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Polymer aging under environmental conditions causes deterioration of service properties. Understanding the aging behavior and mechanism is important not only for lifetime prediction, but also for material improvement and development. Therefore, comprehensive characterization of polymer materials during aging is crucial. In this review, various analytical methods for characterization of chemical changes, physical changes and service properties are introduced. Based on that, methods for stabilization evaluation and lifetime prediction, especially sensitive evaluation methods are reviewed. Chemical changes include molecular weight changes by chain scission and crosslinking, functional group changes on the surface and in the bulk, formation of free radicals, formation of small molecular species as the degradation products, and chemical distribution by heterogeneous aging and additives migration. Physical changes include crystallization changes (post- or chemi-crystallization) and morphology changes (cracking, debonding, etc.). Service property changes include deterioration of processability, mechanical properties, electrical properties and appearance. In the end, existing problems and future research perspective are proposed, including relationship between chemical/physical changes and service properties, introduction of modern mathematical and computer tools. [ABSTRACT FROM AUTHOR]

The research on slope stability of open-pit mine has always been a key technical problem that plagues safe production, and it is also an important research topic in geotechnical engineering. Changshanhao open-pit mine is the largest gold mine in northern China. The increasing mining depth has led to various slope instability problems. Based on the background of ' 2021·10 landslide ' in the northeast stope, this paper carries out a new round of slope stability evaluation and disaster prevention countermeasures from the strategic height of the future development of the mining area. Firstly, the site engineering geological survey is carried out by using scanline method, and the main structural characteristics such as faults are summarized, and the comprehensive zoning map of engineering geology is established to reveal the failure mode of the slope in northeast stope are planar sliding and wedge sliding. Secondly, based on the principle of slope classification analysis, the study area is divided into overall slope, combined step slope and step slope, and the structural plane is matched with it. The stability of mining slope is preliminarily evaluated by stereographic projection method and Q-slope method. Approximately 13.9% of the area was classified as high-risk. Finally, the three-dimensional calculation model of the stope is established, and the FLAC3D is used to invert the landslide to reveal the influence mechanism of the fault on the slope stability. Combined with the analytical solution and the numerical solution, a suggestion is made to optimize the slope angle by raising the boundary., which lays a foundation for the sustainable and safe mining of the mine. [ABSTRACT FROM AUTHOR]

To address the problems of randomness and dynamics in the evaluation of the stability of the mined-out area in medium-deep hole mining，method of evaluating the stability of the mined-out area in medium-deep hole mining based on the improved entropy weight method and the object element analysis method was proposed in this paper. Considering three aspects of environment, geology and engineering，14 evaluation indexes such as maximum geostress were selected > the improved entropy weighting method was utilized > and the 14 evaluation indexes were objectvelyassgned. An objectvely empowered elemental analyss model was constructed，and a setof gradng standards for the stability of the mined-out area of medium-deep hole mining was formulated. Taking H8 ore body of Hexi district of Maoping lead-zinc mine as the research object, the stability evaluation of the mined-out area of medium-deep hole mining arranged along the strike of the ore body was carried out. Numerical simulation was used to invert the process of medium-deep hole mining and filling, and analyze the results of stress, plastic zone and displacement of the rock in the mined-out aera after medium-deep hole mining, so as to compare and verify the feasibility of the method of evaluating the stability of the mined-out aera in the medium-deep hole stope. The results show that the eigenvalues of the variables of the medium-deep hole stope mined-out area level in the H8 ore body of the Hexi district of Maoping lead-zinc mine are 2. 27, i. e., B(more stable)grade, and combined with the capacity of on-site equipments and the morphology of the ore body, the industrial test of optimization of the stope structural parameters can be further carried out. The model overcomes the subjectivity of evaluation index weighting analysis, and the results are accurate， whIch can guide the selection and optmzaton of the structural parameters of the medum-deep hole mining feld guarantee the safe and efficient mining of the medium-deep hole minig field andat the same time provide theoretical support for the application of the medium-deep hole mining technology in similar underground mnes. [ABSTRACT FROM AUTHOR]

In order to study the bearing characteristics and treatment effects of anti-sliping piles in the treatment of accumulation landslides in the Bailong River Basin, Zhouqu section, Zhouqu Jiangdingya landslide treatment project was taken as the object. Steel bar stress gauges were arranged at the middle and corners of the upstream and downstream sliding surfaces of the three anti-sliping piles at the front edge of the landslide, and dynamic data from three years were obtained on site. Numerical simulation analysis was conducted on the treated landslide using ABAQUS. The results show that: (1) The stress growth rate of pile reinforcement has significantly slowed down compared to the end of construction, which is lower than the design value of tensile strength, and the rebar is still in an elastic working state, indicating that the treatment effect of anti-sliding piles on the landslide control is good; (2) The multi-level sliding of Jiangdingya landslide causes the anti-sliding piles to not only be effected by the landslide thrust, but also by the frictional force of the rock and soil body. Specifically, the steel bars on both sides of the sliding and backing surfaces of the three test piles is mainly tensile stress at depths of 5 m, 10 m and 20 m, which is opposite to the stress state of tension and compression on both sides of the section when designing anti-sliding piles according to current standards. This discrepancy is due to the superposition effect of stress. When the tensile stress generated by friction force on the pile is greater than the bending compressive stress, the overall stress of the steel bar on that side will be tensile stress. (3) After the completion of the treatment project, the horizontal displacement of the landslide is analyzed by numerical simulation. It was found that the maximum horizontal displacement of the landslide was 33.93 mm, indicating that the reinforcement of the landslide support structure is good. The landslide body is in a stable state after reinforcement, and a new deformation coordination between piles and soil has been formed. The research results can provide scientific basis for the design of accumulation landslide control project in this area. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: RT-qPCR is a powerful strategy for recognizing the most appropriate reference genes, which can successfully minimize experimental mistakes through accurate normalization. Ludisia discolor, recognized for its ornamental value, features little, distinctive blossoms with twisted lips and gynostemium showing chiral asymmetry, together with striking blood-red fallen leaves periodically marked with golden blood vessels. Methods and Results: To ensure the accuracy of qRT-PCR, selecting appropriate reference genes for quantifying target gene expression levels is essential. This study aims to identify stable reference genes during the development of L. discolor. In this study, the entire floral buds, including the lips and gynostemium from different development stages, were taken as materials. Based upon the transcriptome information of L. discolor, nine housekeeping genes, ACT, HIS, EF1-α1, EF1-α2, PP2A, UBQ1, UBQ2, UBQ3, and TUB, were selected in this research study as prospect interior referral genes. The expression of these nine genes were found by RT-qPCR and afterwards comprehensively examined by four software options: geNorm, NormFinder, BestKeeper, and ΔCt. The outcomes of the analysis showed that ACT was the most steady gene, which could be the most effective inner referral gene for the expression evaluation of flower advancement in L. discolor. Conclusions: The results of this study will contribute to the molecular biology research of flower development in L. discolor and closely related species. [ABSTRACT FROM AUTHOR]

Underground oil storage is the development trend for large-scale energy storage. The anhydrite rock cavern oil storage (ARCOS) has the potential to become an oil storage medium, and the tightness and stability are the key parameters to ensure the safety of oil storage. Thus, the novelty of this paper aims to analyze the tightness and stability of ARCOS from experimental and numerical research. In detail, a series of anhydrite rock experiments (permeability experiments, rock surface experiments, breakthrough experiments, water solubility experiments, component experiments and microstructure experiments) are conducted to evaluate the tightness of ARCOS based on Taian's anhydrite mine. A 3D numerical model is built to analyze the stability of ARCOS in two conditions (long-term and injection–production) by the three-dimensional explicit finite difference method. The results show that the permeability of anhydrite rock is low ( 10 - 20 - 10 - 19 m 2 ), the anhydrite rock has high breakthrough pressure (9.61 MPa) which is less than maximum operating pressure (5.52 MPa), the solubility of anhydrite is only 0.011 g/100 g H2O. The maximum displacements of ARCOS under long-term and injection–production are 0.13 m and 0.18 m, respectively. The simulation results show great stability under the two working conditions. The research has a reference for the development of large-scale underground ARCOS. Highlights: A novel underground oil storage method that uses anhydrite rock caverns is proposed. A series of anhydrite rock experiments are conducted to analyze the tightness of oil storage. A 3D numerical model is built to analyze the stability of anhydrite rock cavern. The application and prospects of anhydrite rock cavern oil storage are analyzed. [ABSTRACT FROM AUTHOR]

The oil body is an organelle that stores oil in oil crop seeds. The presence of a phospholipid-protein membrane on its surface allows for the dispersion of oil bodies in water, resulting in the formation of a stable water-in-oil emulsion. Oil bodies hold immense potential in the food industry due to its exceptional physicochemical stability and emulsifying properties. The extraction and stability of oil bodies has always been a research hotspot, driven by the need for enhanced extraction efficiency and applicability. There are diverse extraction methods and conditions for plant oil bodies, which can be generally classified into three categories: water extraction, solution extraction, and enzyme-assisted extraction. The choice of extraction methods depends on plant sources and applications. The stability of oil bodies is assessed from physical, chemical, and biological aspects. This comprehensive review summarizes the commonly employed evaluation methods with the aim of encouraging further research and application of oil bodies.

For the problem that the potential risk of coal mine roadway is difficult to be quantified and predicted, the risk factors affecting the stability of roadway are screened and extracted. The fuzzy analytic hierarchy process (FAHP) risk evaluation model and grey relational analysis (GRA) risk evaluation model are fused by fusion operator, and the FAHP-GRA dual algorithm structure model of mining roadway stability evaluation is constructed. The evaluation results are compared with the field engineering and corrected. According to the evaluation results, the main risk factors affecting the stability of mining roadway are found out, and the targeted risk control measures are put forward. The stability evaluation system of mining roadway based on FAHP-GRA fusion algorithm was developed to evaluate the mining roadway of 3−2A07 working face and 3−1116 working face in Luxi Coal Mine. The evaluation results were in high consistency with the monitoring situation of the field roadway, realizing the purpose of “effective evaluation, rapid diagnosis and accurate prevention” of the stability of mining roadway.

Deep-seated toppling in the upper reaches of the Lancang River, southwest China involves deformations exceeding 100 m in depth. The slope deformation is initiated by river downcutting and evolves distinctive characteristics with a depth of river incision. In this study, we propose a system for evaluating the stability of deep-seated toppled slopes in different evolutionary stages. This system contains identification criteria for each evolutionary stage and provides the corresponding stability evaluation methods. Based on the mechanical and kinematic analysis of slope blocks, the specific stage of slope movement can be identified in the field through outcrop mapping, in situ tests, surface displacement monitoring, and adit and borehole explorations. The stability evaluation methods are established based on the limiting equilibrium theory and the strain compatibility between the undisturbed zone and the toppled zone. Finally, several sample slopes in different evolution stages have been investigated to verify the applicability and accuracy of the proposed stability evaluation system. The results indicate that intense tectonic activity and rapid river incision lead to a maximum principal stress ratio exceeding 10 near the slope surface, thus triggering widespread toppling deformations along the river valley. When considering the losses of joint cohesion during the further rotation process, the safety factor of the slope drops by 7%–28%. The self-stabilization of toppling deformation can be recognized by the layer symmetry configuration after the free rotation of the deflected layers. Intensely toppled rock blocks mainly suffer sliding failures beyond the layer symmetry condition. The factor of safety of the K73 rockslide decreased from 1.17 to 0.87 by considering the development of the potential sliding surface and the toe-saturated zone.

The hazardous rock zone on the Wansui Mountain slope in Ganzi Town, Ganzi County, has experienced frequent rockfalls over the years, posing a serious threat to the lives and property of residents below. Therefore, it is crucial to conduct stability analysis of the hazardous rock zone and rockfall trajectory prediction for the Wansui Mountain slope. Focusing on the dangerous rock zone of Wansui Mountain's slope, the geometric dimensions and 3D morphology of the zone were obtained using drone oblique photography combined with field surveys. The development characteristics of the dangerous rock zone and the distribution characteristics of the dangerous rock bodies were analyzed, and the stability of the dangerous rocks was assessed. Based on RAMMS-ROCKFALL, considering the geometric shapes of the dangerous rocks and the 3D terrain, potential rockfall trajectories after the collapse of the dangerous rocks were simulated.The results show that:The slope is generally intact, with the main instability modes being falling and toppling due to weathering. A total of seven dangerous rock zones have developed, which are in an unstable state under seismic conditions; the simulation provided the relationships between rolling and bouncing heights, speeds, kinetic energy, trajectories, and positions. By predicting the rockfall trajectories, the threat range and targets of the dangerous rock zone were determined. The prediction results indicate a significant threat to the houses and pedestrians on the streets below the slope of Wansui Mountain, and remedial measures should be taken as soon as possible.The research results indicate that the use of drone oblique photography is beneficial for the stability analysis of dangerous rock bodies on slopes, compensating for the blind spots of traditional surveys, and improving the efficiency and quality of the investigation. This provides a new approach for the investigation of dangerous rock bodies and rockfall trajectory analysis, which has positive significance for disaster mitigation technology research and the management of dangerous rock bodies.

It is well known that the deformation and damage of reservoir colluvium landslides are often determined by the combined dynamics of reservoir water level change and rainfall. Based on the systematic analysis of the change law of reservoir water level, rainfall and displacements of reservoir colluvium landslide, this paper proposes the compound hydrodynamic action of rainfall and reservoir water as the unload-load parameter, and the landslide displacement as the unload-load response parameter. Based on this, a physical prediction model of the compound hydrodynamic unload-load response ratio of reservoir colluvium landslide was established, and the quantitative relationship between the compound hydrodynamic unload-load response ratio and its stability evolution was in-depth analyzed and determined. On the basis of the above research, taking Shuping landslide, a typical hydrodynamic pressure landslide as an example, the unload-load response ratio model is used to systematically evaluate and predict the stability evolution law and the change trend of the landslide under compound hydrodynamic action. The prediction result shows that the variation law of the compound hydrodynamic unload-load response ratio is consistent with the dynamic evolution law of its stability. Therefore, the above studies show that the compound hydrodynamic unload-load response ratio parameter is an effective displacement dynamic evaluation parameter for reservoir colluvium landslides, so it can be used in the prediction of the reservoir colluvium landslides. [ABSTRACT FROM AUTHOR]

The development of new electric power system is a requirement for China to realize its "carbon peaking and carbon neutrality goals", so it is of great importance that we assess the stability of a new electric power system under certain conditions. Firstly, according to the factors affecting the stability of the new power system, the characteristics of the new electric power system are analyzed in depth, so as to establish a stability evaluation index system including four first-level indices of safety, adequacy, flexibility, and adaptability. Secondly, a stability evaluation model is proposed. Based on the game theory, the entropy weight method, criteria importance though intercrieria correlation (CRITIC) method, and coefficient of variation method are combined and assigned, and the cloud model is improved through the combination of weights, which is used for evaluating the stability of the new electric power system. Finally, the applicability of the proposed evaluation model is verified by an arithmetic example analysis, which can identify the vulnerability of the new electric power system and provide suggestions for improving its stability. The model can provide a theoretical basis for promoting energy transition and sustainable development. [ABSTRACT FROM AUTHOR]

The viaduct is an important infrastructure for urban sustainable development, but it will inevitably pass through a coal mining subsidence area in coal resource-based cities, which poses a threat to the construction and operation of the viaduct. However, there is a lack of research on long time-series monitoring and assessing the safety of elevated bridges above subsidence areas, both domestically and internationally. In this study, a resource-based city viaduct in Shandong, China, was selected as the research object, utilizing SBAS-InSAR technology for deformation monitoring during bridge construction and post-opening phases. The viaduct based on the goaf was analyzed by the key settlement subsection. Before completing construction (March 2019 to December 2020), research revealed that the cumulative maximum deformation in the bridge area was 44mm and the maximum uplift was 22 mm, with overall stability in the underlying subsidence area. After completion (January 2021 to July 2023), the cumulative maximum deformation value in the elevated bridge area was 10mm and the maximum uplift was 6 mm, indicating minimal fluctuations over three years, maintaining overall stability. This stable condition ensures the safety of construction and operation of regional elevated bridges. These findings not only support the safe operation of bridges in underlying subsidence areas but also provide a new approach to sustainable areas globally, especially in coal resource-based urban areas. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Ground Improvement is the property of Journal of Ground Improvement Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The hazardous rock zone on the Wansui Mountain slope in Ganzi Town, Ganzi County, has experienced frequent rockfalls over the years, posing a serious threat to the lives and property of residents below. Therefore, it is crucial to conduct stability analysis of the hazardous rock zone and rockfall trajectory prediction for the Wansui Mountain slope. Focusing on the dangerous rock zone of Wansui Mountain's slope, the geometric dimensions and 3D morphology of the zone were obtained using drone oblique photography combined with field surveys. The development characteristics of the dangerous rock zone and the distribution characteristics of the dangerous rock bodies were analyzed, and the stability of the dangerous rocks was assessed. Based on RAMMS-ROCKFALL, considering the geometric shapes of the dangerous rocks and the 3D terrain, potential rockfall trajectories after the collapse of the dangerous rocks were simulated.The results show that:The slope is generally intact, with the main instability modes being falling and toppling due to weathering. A total of seven dangerous rock zones have developed, which are in an unstable state under seismic conditions; the simulation provided the relationships between rolling and bouncing heights, speeds, kinetic energy, trajectories, and positions. By predicting the rockfall trajectories, the threat range and targets of the dangerous rock zone were determined. The prediction results indicate a significant threat to the houses and pedestrians on the streets below the slope of Wansui Mountain, and remedial measures should be taken as soon as possible.The research results indicate that the use of drone oblique photography is beneficial for the stability analysis of dangerous rock bodies on slopes, compensating for the blind spots of traditional surveys, and improving the efficiency and quality of the investigation. This provides a new approach for the investigation of dangerous rock bodies and rockfall trajectory analysis, which has positive significance for disaster mitigation technology research and the management of dangerous rock bodies. [ABSTRACT FROM AUTHOR]

Abstract The Three Gorges Reservoir Area (TGRA) is characterized by unique geological features that increase its susceptibility to landslides. These slopes are especially prone to destabilization when influenced by external triggers like rainfall. This research focuses on the Piansongshu landslide within the TGRA, aiming at unraveling the complex internal deformation mechanisms of landslides triggered by rainfall and providing critical insights for their prevention and mitigation. The study begins with on-site geological surveys to meticulously examine the macroscopic signs and mechanisms of deformation. It then utilizes the GeoStudio numerical simulation software to assess the landslide's stability, focusing on the changes in internal seepage fields and stability under various rainfall scenarios. Results indicate that continuous rainfall leads to the formation of a temporary saturation zone on the slope, which gradually deepens. In regions with more pronounced deformation, the infiltration line at the leading edge of accumulation notably protrudes towards the surface. Notably, the stability coefficient of the secondary shear surface of the landslide fluctuates more significantly than that of the primary sliding surface. Higher rainfall intensity and longer duration are positively correlated with a more pronounced decrease in stability coefficients. The impact on stability also varies across different rainfall patterns. As rainfall infiltrates over time, the slope's safety factor gradually decreases. This reduction continues even post-rainfall, indicating a delayed restoration period before stability returns to a safe level. These results yield valuable data for forecasting and mitigating landslides.

After the “6 • 1” Lushan earthquake, unstable rock mass was discovered in Zhangjiagou, posing a severe threat to the safety of the residents and their property below. The dangerous rock mass was evaluated using stability calculation and the discrete element numerical analysis method, and the seismic condition with the highest threat level was selected for kinematic analysis. Based on this research, a combination of analytical solution and numerical solution was used to design corresponding protective measures. The main conclusions are as follows : (1) The structure of the unstable rock mass in Zhangjiagou is broken, and a controlling structural plane is developed along the slope. (2) The stability calculations and numerical simulations show that the Zhangjiagou unstable rock mass will become unstable under natural, rainstorm and seismic conditions, with the longest movement distance occurring during an earthquake. (3) The failure mode of the dangerous rock mass under seismic conditions is a shatter-slip type, where the rock mainly slips during movement, and the jump height is small. Additionally, the slope shape significantly affects the characteristics of rockfall movement. (4) The collision and extrusion between rockfalls can change their motion characteristics and impact kinetic energy, potentially increasing the scope of the disaster. The research results can provide a reference for similar disaster prevention and control efforts.

In this paper, by considering the dynamic water pressure and particle migration effect caused by reservoir level variation, the weakening effect of slip zone soil influenced by rainfall infiltration, and the interaction force between multistage sliding bodies, an improved transfer coefficient method for multistage sliding ancient landslide is proposed under the combined action of reservoir level variation and rainfall. The results show that (1) the combined action of reservoir level variation and rainfall has a significant influence on the stability of multistage sliding ancient landslides. (2) The sliding force calculated by the improved transfer coefficient method is smaller than the calculation result by the traditional transfer coefficient method, and the residual sliding force is larger. The different sliding body stability coefficient is reduced by about 28.84, 18.13, 19.26, and 21.01%, respectively. (3) The stability results calculated by the traditional transfer coefficient are higher than the improved transfer coefficient method, which may lead to deviation in the multistage sliding ancient landslide stable state judgment. (4) This improved transfer coefficient method can provide a reference for the multistage sliding ancient landslides stability accurate evaluation in hydropower station reservoir area. HIGHLIGHTS For the landslide disaster risk management in hydropower station reservoir area, a new method of ancient landslide multistage landslide stability evaluation under the combined influence of water storage and rainfall is proposed.; This improved transfer coefficient method considers the effect of particle migration caused by dynamic water pressure, the difference of strength parameters in slip zone different parts, and the influence of the interaction force between multistage sliding bodies.;

Geological sequestration of CO2 in closed coal mines' coal seams is a significant method for CO2 sequestration and an effective strategy to achieve short-term carbon emission reduction goals. This study focuses on the Sanhejian coal mine in Xuzhou City, Jiangsu Province. The study scrutinizes the features of the coal rock and the quality of the mined No. 7 and No. 9 coal seams. Additionally, it calculates the remaining coal resource reserves. The study also applies the fuzzy comprehensive evaluation method to identify nine main influencing factors for the CO2 storage stability of the No. 7 and No. 9 coals. These factors include the stability factor, the nature of the overlying rock strata, the complexity of the geotectonic structure, the index of groundwater, the ratio of the sealed coal bed pressure to temperature, the ratio of the sealed coal bed depth to depth, the permeability of sealed coal beds, the degree of the hollowing-out collapse, and other relevant factors. We assessed the stability of CO2 storage in No. 7 and No. 9 coals based on key influencing elements. We developed a CO2 storage evaluation method to assess the CO2 storage capacity of coal seams in sealed coal mines. The findings indicate that the remaining reserves of No. 7 coal and No. 9 coal in the Sanhejian closed coal mine are substantial. The comprehensive evaluation results for CO2 storage stability are 86.209 and 87.698, respectively, indicating a higher level of stability and greater potential for storage. The CO2 storage capacity of the No. 7 and No. 9 coal seams in the closed coal mines of Sanhejian was determined using the established evaluation method. We calculated the theoretical storage capacity to be 207.6 Mt and 80.9 Mt, respectively. This led to the division of the storage area into three levels: favorable, more favorable, and unfavorable. The work can establish a fundamental foundation for investigating the storage of CO2 in coal seams within decommissioned coal mines.

Abstract Freeze–thaw failure of frozen rock slope often occurs during engineering construction and mining in cold area, which poses a great threat to engineering construction and people's life safety. The properties of rock mass in cold region will change with the periodic change of temperature, which makes it difficult to accurately evaluate the stability of slope under the action of freeze–thaw cycle by conventional methods. Based on field investigation and literature review, this paper discusses the characteristics of frozen rock mass and the failure mechanism of frozen rock slope, and gives the types and failure modes of frozen rock slope. Then, the research status of frozen rock slope is analyzed. It is pointed out that the failure of frozen rock slope is the result of thermo-hydro-mechanical (THM) coupling. It is considered that freeze–thaw cycle, rainfall infiltration and fracture propagation have significant effects on the stability of frozen rock slope, and numerical simulation is used to demonstrate. The research shows that the safety factor of frozen rock slope changes dynamically with the surface temperature, and the safety factor of slope decreases year by year with the increase of freeze–thaw cycles, and the fracture expansion will significantly reduce the safety factor. Based on the above knowledge, a time-varying evaluation method of frozen rock slope stability based on THM coupling theory is proposed. This paper can deepen scholars' understanding of rock fracture slope in cold area and promote related research work.

The Three Gorges Reservoir Area (TGRA) is characterized by unique geological features that increase its susceptibility to landslides. These slopes are especially prone to destabilization when influenced by external triggers like rainfall. This research focuses on the Piansongshu landslide within the TGRA, aiming at unraveling the complex internal deformation mechanisms of landslides triggered by rainfall and providing critical insights for their prevention and mitigation. The study begins with on-site geological surveys to meticulously examine the macroscopic signs and mechanisms of deformation. It then utilizes the GeoStudio numerical simulation software to assess the landslide's stability, focusing on the changes in internal seepage fields and stability under various rainfall scenarios. Results indicate that continuous rainfall leads to the formation of a temporary saturation zone on the slope, which gradually deepens. In regions with more pronounced deformation, the infiltration line at the leading edge of accumulation notably protrudes towards the surface. Notably, the stability coefficient of the secondary shear surface of the landslide fluctuates more significantly than that of the primary sliding surface. Higher rainfall intensity and longer duration are positively correlated with a more pronounced decrease in stability coefficients. The impact on stability also varies across different rainfall patterns. As rainfall infiltrates over time, the slope's safety factor gradually decreases. This reduction continues even post-rainfall, indicating a delayed restoration period before stability returns to a safe level. These results yield valuable data for forecasting and mitigating landslides. [ABSTRACT FROM AUTHOR]

Recent optoelectronics domain studies concluded the increased need to provide improved, stable, and efficient designs to operate high-power NIR (Near-infrared) laser diodes. The existing current regulators provide either stability or high efficiency, with the actual studied design representing a solution providing both advantages in a complex constant current driver. Therefore, this study covers the LTI (Linear Time-Invariant) analysis of a cascade feedback loop current regulator, aiming to achieve a constant current through a high transconductance load. Furthermore, this analysis also refers to such transconductance loads as NIR laser diode bars, having their emission spectrum closely matching one major absorption band of Nd:YAG (Neodymium-dopped Yttrium Aluminum Garnet) solid-state lasers, potentially providing an increased-stability solution to high power, continuous wave side-pumped applications, as well as various DPSS (Diode-Pumped Solid-State) laser prototypes. This design is a suitable solution for an infinite transconductance load, allowing the indefinite power increase in either direct diode or pumped laser applications while maintaining adequate stability. However, as it will be covered, multiple constraints occur for this hardware design. [ABSTRACT FROM AUTHOR]

The evaluation and classification of goaf stability are fuzzy and random. To address this problem, a new classification method is proposed. A cavity monitoring system is used to detect the goaf, 3DMine and FLAC3D software are used to conduct the 3D visual modeling of the scanning results, and numerical simulation analysis is performed on the goaf. According to the analysis results, the stability classification standard of the goaf is constructed, and the characteristics of each classification are described. The evaluation indicator system of goaf stability is constructed in accordance with similar engineering experience, and the evaluation indicator is weighted by using the analytic hierarchy process. The cloud–element coupling evaluation model is built, the field measured values of indicators are collected, the cloud correlation degree of goafs belonging to each stability level is calculated, the stability level is evaluated according to the principle of maximum membership degree, and the results are compared with the numerical simulation to analyze the reasons for the differences in the stability evaluation results obtained by the two methods and to improve the accuracy of the evaluation of goaf stability. The pillar stress and surrounding rock deformation are monitored in Room 1# of the inclined mining area of Shirengou Iron Mine. The monitoring results are consistent with the evaluation results, which proves the accuracy of the proposed goaf stability classification method. [ABSTRACT FROM AUTHOR]

The powered aeroassisted orbital maneuver (AOM) is an emerging type of AOM manner, which can fulfill various complicated orbital transfer missions more flexibly and efficiently by virtue of aerodynamic forces and synergetic thrust. In this paper, an adaptive control strategy is presented for the reference trajectory tracking guidance of powered AOM under system uncertainties and input constraints. The presented controller is designed with an attack angle control law and a bank angle control law. The constrained control inputs are smoothly described through a hyperbolic tangent-type function. Then, the attack angle and bank angle control laws are separately developed by utilizing the first-order and second-order backstepping control methods. Besides, the parametric adaptive mechanism is incorporated to identify the squares of the upper bounds of the total uncertain items. Benefiting from this design, the presented controller can not only resist system uncertainties, but also accommodate input constraints. The stability evaluation shows that the radial distance and velocity tracking errors under the presented controller can eventually stabilize to the bounded minor fields around zero. Lastly, the derived results are verified through comparative studies with an existing controller and Monte Carlo simulations under different conditions. [ABSTRACT FROM AUTHOR]

The undisturbed soil in the slip zone is highly water sensitive. Elucidation of its strength properties and degradation mechanism is important for assessing the stability of slopes with bedding planes parallel to the slope. For this purpose, a series of direct shear test, ring shear test, scanning electronic microscope (SEM) test, and nuclear magnetic resonance (NMR) test were conducted on undisturbed slip zone soil samples sourced from a typical bedding slope along the Mabian River. Finally, an evaluation method of the bedding slope stability was investigated. The results show that the shear strength of undisturbed slip zone soils under saturated softening degrades sharply within the first hour. During this period, the moisture content of slip zone soil increased by 79.6%, and the cohesion and internal friction angle decreased by 45.0% and 36.2%, respectively. The occlusion of coarse grains in the slip zone soil hinders the formation of the shear plane, thus transforming the occlusal friction into sliding friction under saturated softening, leading to an obvious characteristic strain softening. The decreasing shear strength of the slip zone soil is caused by the shear failure of its internal structure. Under saturated softening, cementation between solid grains is destroyed when clay minerals are swelled by water absorption. Furthermore, the NMR shows the increase in the volume of small pores in the samples under submerged conditions, indicating a more losing structure, which provides a reasonable explanation for the significant strength degradation of undisturbed samples. A quantitative relationship is proposed for the bedding slope stability considering the effect of saturated softening. [ABSTRACT FROM AUTHOR]

Introduction: The active compound (E)‐1‐(3′,4′‐dimethoxyphenyl)butadiene (DMPBD) isolated from the rhizomes of Zingiber cassumunar Roxb. has potent anti‐inflammatory and anticancer activities. Although DMPBD is one of the promising drug candidates for phytomedicine, its limited stability impedes its widespread use. For the development of new drugs, the assessment of their chemical stability is essential, ensuring they maintain their properties within specified limits throughout the period from production until use. Objective: In the present study, we aimed to evaluate the stability of DMPBD under various conditions, including different solvents, temperatures, and lighting conditions, to identify the factors affecting stability and optimize the storage and handling conditions. Methodology: DMPBD samples subjected to the different conditions tested were monitored by quantitative 1H NMR (qHNMR), using an internal standard for the determination of the absolute quantity of DMPBD as a function of time and the changes thereof within 1 month. Results: Significant decomposition of DMPBD was observed in chloroform‐d1, whereas its content remained constant in methanol‐d4. The content of DMPBD was maintained upon storage at temperatures below 4°C, both as methanolic solution and in the crude extract. Exposure to light had a slight negative impact on its contents. Some degradation products could be identified as resulting from O2‐induced cleavage of the diene moiety. Conclusions: For pharmacological/therapeutic applications, DMPBD should be stored in the form of the crude extract or as a purified material in methanolic solution. Ideally, the storage temperature should be below 4°C and O2 should be excluded. The stability of DMPBD under various conditions was studied using qHNMR to monitor its changes in content over 1 month. Solvent and storage temperature significantly influenced the stability of DMPBD, while light exposure had a slight negative impact on its stability. The DMPBD content remained constant upon storage at temperatures below 4°C, both as a methanolic solution and in the crude extract. Some degradation products could be identified as resulting from O2‐induced cleavage of the diene moiety. [ABSTRACT FROM AUTHOR]

Freeze–thaw failure of frozen rock slope often occurs during engineering construction and mining in cold area, which poses a great threat to engineering construction and people's life safety. The properties of rock mass in cold region will change with the periodic change of temperature, which makes it difficult to accurately evaluate the stability of slope under the action of freeze–thaw cycle by conventional methods. Based on field investigation and literature review, this paper discusses the characteristics of frozen rock mass and the failure mechanism of frozen rock slope, and gives the types and failure modes of frozen rock slope. Then, the research status of frozen rock slope is analyzed. It is pointed out that the failure of frozen rock slope is the result of thermo-hydro-mechanical (THM) coupling. It is considered that freeze–thaw cycle, rainfall infiltration and fracture propagation have significant effects on the stability of frozen rock slope, and numerical simulation is used to demonstrate. The research shows that the safety factor of frozen rock slope changes dynamically with the surface temperature, and the safety factor of slope decreases year by year with the increase of freeze–thaw cycles, and the fracture expansion will significantly reduce the safety factor. Based on the above knowledge, a time-varying evaluation method of frozen rock slope stability based on THM coupling theory is proposed. This paper can deepen scholars' understanding of rock fracture slope in cold area and promote related research work. [ABSTRACT FROM AUTHOR]

Objective: The current study aimed to provide preliminary insights into potential biopharmaceutical applications of Carica papaya seed extract by evaluating its phytochemical and biological profiles. Furthermore, the study aimed to develop a stable oil‐in‐water (O/W) emulsion for the effective delivery of antioxidant‐rich biologicals for cosmetic purposes. Methods: The hydroethanolic (ethanol 80%: 20% water) extract of C. papaya seeds was prepared via maceration technique. The chemical composition was carried out through preliminary phytochemical screening and estimation of total phenolic contents (TPC) and total flavonoid contents (TFC). The biological profile of the extract was explored using various in‐vitro antioxidant methods. The homogenization procedure was used to create a cream of O/W and various tests were applied to assess the stability of the emulsion. By keeping the emulsion at different storage conditions (8 ± 0.5°C, 25 ± 0.5°C, 40 ± 0.5°C, and 40 ± 0.5°C ± 75% relative humidity [RH]) for a period of 28 days), the physical stability parameters of the emulsion, including pH, viscosity, centrifugation, phase separation, and conductivity, as well as rheological parameters and organoleptic parameters (odor, color, liquefaction, and creaming), were assessed. Results: The preliminary phytochemical screening assay revealed the presence of various plant secondary metabolites including alkaloids, phenolics, flavonoids, tannins, saponins, and quinones. The extract was found to be rich in TPC and TFC. The in vitro antioxidant study gave maximum activity in the DPPH method. The plant extract containing cosmetic cream exhibited remarkable stability during the entire research. Data gathered indicated that no phase separation or liquefaction was seen after the experimental period. Throughout the experimental period, a small variation in the pH and conductivity values of the base and formulation was seen. Conclusion: The findings suggest that the seed extract of C. papaya is a rich source of polyphenols with antioxidant potential and can be a promising alternative for the treatment of various ailments. The stability of emulsion paves the way for its utilization as a carrier for the delivery of 3% C. papaya seed extract and applications in cosmetics products. [ABSTRACT FROM AUTHOR]

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Geological Hazard & Control is the property of China Institute of Geological Environmental Monitoring (CIGEM) Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Rock collapse is the most frequent type of sudden geological hazards in Beijing area. Mostly developed on high-steep slopes, this kind of collapses is difficult to investigate through the traditional contact survey method. In this paper, the three-dimensional (3D) laser scanning is used to investigate Nangang rock collapse in Mentougou District, Beijing. By combining the point cloud data and high-definition image data, the 3D space model of the Nangang collapse is constructed. On this Basis, the development characteristics of structural planes in the study area are analyzed, and three typical dangerous rock masses are selected for characteristic parameters. These parameters provide data support for the stability analysis of dangerous rock masses. Rockfall software is used to simulate and analyze the movement track of these typically dangerous rock masses, and the danger posed by rock collapses to nearby houses is studied. The results of this work provide important references for the exploration and stability evaluation of rock collapses in Beijing. [ABSTRACT FROM AUTHOR]

The analysis and evaluation of slope stability is an indispensable link in slope investigation and evaluation. This article takes the Jinlong Slope in Zhuhai City as the research object to analyze its development characteristics, influencing factors, and formation mechanism. Through identifying the exposed and structural characteristics of the slope rock and soil, and based on the typical section C and φ Value inversion analysis and sensitivity analysis results, the physical and mechanical parameters are obtained of the rock and soil mass of the Jinlong slope. Then the limit equilibrium method is used to analyze and evaluate the stability of the Jinlong slope. The evaluation results indicate that the Jinlong slope lacks stability under natural conditions and is unstable under saturated and saturated+seismic conditions. [ABSTRACT FROM AUTHOR]

In order to explore the genetic mechanism and ecological governance model of the landslide and collapse geological disaster on the unstable slope in the Metamorphic rock area of northwest Hubei, the unstable slope in the bedding Metamorphic rock of Sanyongtang was chosen as the research object, on the basis of identifying the geological and deformation characteristics of the disaster body, the possible failure modes and main influencing factors were analyzed, and the mechanism of progressive deformation and failure of bedding metamorphic rock slopes was deeply explored. The stability calculation and evaluation of an unstable slope were conducted using methods such as limit equilibrium, and the results show that the slope was in an unstable state. Based on the concept of ecological management of geological disasters, the comprehensive prevention and control measures have been proposed, including cutting and shaping, foot protection walls, framed anchor, truncation drain, ecological greening and monitoring. Through engineering implementation and effectiveness monitoring, it has been shown that this treatment scheme not only effectively eliminates the safety problem of landslide and collapse geological hazards in the Sanyongtang, but also achieves good environmental greening and beautification effects. Its comprehensive prevention measures, especially the ecological governance mode integrating geological disaster prevention and ecological greening, can provide reference for the reinforcement and slope protection of similar bedding Metamorphic rock unstable slopes. [ABSTRACT FROM AUTHOR]

For the current problems of poor grasping force control performance and complex control systems in robot hands, a forward-looking predictive intelligent force control method for complaisant grasping of thin-skinned fruits based on the structural performance advantages of flexible hands was proposed. Four grasping planning methods suitable for flexible hand structure configuration were proposed with the optimal configuration and force closure as constraints, and grasping stability evaluation mechanism was established. The nonlinear regression prediction model based on radial basis function neural network was constructed, and the prospective intelligent force control algorithm based on minimum grasping force was put forward emphatically. The structure of the grasping system was analyzed, a layered modular flexible hand control system was designed, and finally a flexible hand grasping experimental platform was built to conduct grasping performance testing. The experimental results show that our proposed method reduces the grasping force by 10.64% and 6.91% compared to the other two methods, respectively. At the same time, the success rate of grasping is increased by 2.67% and 5.00%, respectively, with an average success rate of 98.00%. The study provides a reference for further research on flexible hands. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Remote Sensing is the property of Editorial Office of Journal of Remote Sensing & Science Publishing Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To ensure the safety of construction and operation of the tunnel near the goaf. Based on dynamic numerical analysis, three-dimensional finite difference numerical simulation software was developed by FISH programming. Then, on basis of the construction of practical engineering, the safety distance and energy evolution mechanism in an underlying mining goaf area of deep tunnel are studied. The results show that according to the different safe distance in an underlying mining goaf area of deep tunnel, the tunnel structure is divided into danger zone, influence zone and safe zone. The relationship between the cumulative horizontal energy and stress ratio can be divided into three stages: acceleration, average stability, and deceleration. The energy evolution of the three stages can also better reflect the damage and failure mechanism inside the surrounding rock mass. The measured field curve shows that when the safety distance is 12 m, the goaf has limited influence on the stability of the tunnel, and the construction in an underlying mining goaf area of deep tunnel is stable overall and meets the safety requirements. The best safe distance between the tunnel and goaf is about one time of the tunnel span. [ABSTRACT FROM AUTHOR]

Resource-based cities often face land scarcity during their developmental and expansionary phases. However, repurposing the goaf sites of suburban coal mines has been recognized as an effective strategy for alleviating this issue, particularly pertinent for suburban coal mines using strip mining techniques to protect ground-level structures. Old strip mining goaf is easily influenced by disturbance and leads to secondary surface deformation, which will threaten the construction above old strip mining goaf. Therefore, it is essential to provide a basis and reference for decision-makers regarding surface residual subsidence for strip mining. In the paper, based on the morphology and structure of the old strip mining goaf before the surface residual subsidence, the reason and mechanism of the residual subsidence of old strip mining goaf are studied. The results show that the main reasons for the "activation" of old strip mining goaf are the re-compaction of the under-compacted part of the fractured rock mass in the caving zone, the stripping and yielding of coal pillar under the action of groundwater erosion, weathering, and the collapse of residual voids. Based on the above analysis, a prediction model of the surface residual subsidence of the old strip mining goaf is proposed, which takes into account the compaction of the under-compacted area, the collapse of the residual voids, and the stripping and yielding of the coal pillar. The proposed method is implemented to evaluate the stability of a city viaduct goaf. Our research outcomes bear valuable theoretical and practical implications for site stability assessments of old strip mining goafs and the sustainable repurposing of land resources in suburban resource-based cities. [ABSTRACT FROM AUTHOR]

In order to identify the occurrence characteristics of old gob in abandoned iron mine accurately, evaluate its stability scientifically, prevent and control surface collapse disaster of gob effectively, Dunqiu iron mine in Jinan City was taken as an engineering background, occurrence characteristics and stability of old gob were studied. By the geophysical exploration and exploration drilling, the plane and horizon distribution of the goaf was obtained, furthermore, a three-dimensional geological model of old gob was built, which could realize the three-dimensional display of gob occurrence characteristics. Three methods of surface deformation monitoring, critical load depth calculation and ratio of burial depth to mining thickness were used to evaluate the stability of old gob. The results show that the plane area of gob formed by the mining of No. 2 orebody group is 4 992. 5 m² . The gob can be divided into pure gob and backfill gob, which is 2 ~ 4 floors, 38 ~ 152 m depth and 1. 6 ~ 45. 7 m thickness, the maximum thickness of pure gob is 10. 8 m. The stability of old gob is poor and has a risk of collapse. It is concluded that the research methods and results have certain guiding significance for the detection and treatment of old gob in iron mine. [ABSTRACT FROM AUTHOR]

Henggu 12 is a new millet variety with low stalk, extremely early maturity and strong tillering ability, which was developed by the Institute of Dry Farming Agriculture of Hebei Academy of Agriculture and Forestry Sciences. In 2019, the hetero-short and tall mutant was obtained from Henggu 12 breeding field. In order to identify the stability of the mutant and provide reliable test materials for further study of plant height, tillering and heading stage, the material was sown at one point in two years, two points in one year and at the cutoff stage. The results showed that the hetero-tall and short mutant of Henggu 12 had stable genetic characteristics, and the agronomic traits and phenotypes were not affected by time, location or sowing date, so it could be used as stable genetic material. [ABSTRACT FROM AUTHOR]

The stability of inclined shaft lining structure (ISLS) in complex water-rich strata is affected by many factors, such as water pressure, joint, soft rock, lining corrosion and so on. The instability of the ISLS will affect the safe and efficient coal mine production. Bathe sed on the geological conditions of the Xiaobaodang coal mine, this paper tested the evolution characteristics of concrete composition in long-term water seepage areas and revealed the influence mechanism of corrosion weakening of shaft lining (SL) in water-rich strata. Meanwhile, transient electromagnetic, ground penetrating radar, and infrared monitoring are used to detect the water-rich zones, and damage zones of surrounding rock and lining water seepage zones, and a three-level safety evaluation model for the instability risk of ISLS is constructed. Water abundance of the surrounding rock, surrounding rock deterioration, and shaft lining seepage were the specific indicators in the model. The main inclined shaft (MIS) in the studied coal mine is divided into three levels: non instability risk zone, potential instability risk zone, and high instability risk zone. According to the evaluation results, comprehensive prevention and control measures of “hydrophobic hole drainage” and “back-lining grouting” are adopted for the water inrush source and the surrounding rock micro-crack water channel. The precise prevention and control of ISLS is realized. The research results also provide a reference for the stability evaluation of ISLS and the accurate prevention and control under similar conditions. [ABSTRACT FROM AUTHOR]

The foundation of a large river crossing bridge is often located on high and steep slopes in mountainous area, and the stability of the slope has a significant impact on the safety of the bridge. Not only the bridge load, but also the hydro-dynamical action in the reservoir area has a significant impact on the stability of the bank slope where the bridge foundation is located, especially for the toppling bank slope. This paper takes the stability of the toppling bank slope where the one major bridge foundation is located at on the Lancang River in China as an example. Through on-site exploration, drilling data and core conditions, and television images of the borehole, the geological structure of the on-site bank slope were conducted. Based on the development of the dumping body obtained from on-site exploration, corresponding indicators have been proposed from the perspectives of rock inclination, deformation, and rock quality to clarify the degree of dumping along the depth of the bank slope. The failure mechanism of the overturned bank slope under the action of a bridge was analyzed from a mechanical perspective. Numerical simulations were conducted using GeoStudio 2018:SEEP/W and FLAC3D 6.0 software to analyze the failure modes of bridge loads and hydrodynamic forces under different water levels and rainfall conditions. The seepage field characteristics, failure modes, and stability characteristics were analyzed from a two-dimensional perspective, while the displacement characteristics, plastic zone, and stress–strain characteristics were explored from a three-dimensional perspective, which revealed the evolution mode of overturned deformation under the action of bridge foundation loads. Finally, the stability of the wide slope was numerically calculated using the strength reduction method, and the stability calculation data was combined with the numerical simulation results to determine the optimal location of the bridge foundation. [ABSTRACT FROM AUTHOR]

To address the problem of low evaluation accuracy of the Sinmap model in evaluating the stability of shallow loess landslides under the action of rainfall, a method based on the Maxent-Sinmap model is constructed to evaluate the stability of regional shallow rainfall loess landslides under the action of rainfall by improving the evaluation of the Sinmap model based on the maximum entropy model.Taking Zhidan County, Shaanxi Province, a high-incidence area of loess landslides, as an example, the relevant data of topography, geotechnical parameters and geological disasters were obtained by field and indoor work. The main environmental variables were obtained by Maxent model, and then the main environmental variables were partitioned. The Sinmap model was used to evaluate the stability of shallow loess landslides in different partitions under rainfall. The results show that based on the Maxent model, the landslide in Zhidan County is mainly affected by five indicators, such as slope, rainfall, landform, road buffer zone and normalized vegetation coverage index. The contribution rates to historical disaster points are 27.1 %, 20.3 %, 18.8 %, 18.7 % and 6.2 %, respectively. Compared with the traditional Sinmap model, the density of disaster points in the unstable area of the model increased by 17.26 %, 16.54 %, 17.39 %, 14.20 % and 12.96 % respectively under the conditions of light rainfall, moderate rainfall, heavy rainfall, rainstorm and downpour. The results of the Maxent-Sinmap model have a larger stable area than those of the Sinmap model, and there is no historical disaster distribution in the expanded area of the stable area. The model has higher accuracy and more reliable results, which can provide a better scientific basis for the evaluation of regional shallow rainfall landslides.

The stability of newly failed soil slopes, particularly under the influence of heavy rainfall, presents a significant threat to the safety of on-site rescue personnel. It is urgent to find a quick and accurate method for evaluating the stability of such slopes. The evaluation methods used for reactivating ancient landslides cannot be directly applied because the shear strength of the soil at the sliding surface of ancient landslides improves over time. Common numerical analysis methods such as limit equilibrium slice method or finite element method require time-consuming on-site surveys, which may affect the progress of rescue operations. The cloud model evaluation method is suitable for evaluating the stability of these slopes as it has lower accuracy requirements for evaluation factors, thus compensating for the limitations of the aforementioned methods. However, the current research on the weight of evaluation factors in cloud model evaluation still has some deficiencies. Therefore, a weight inversion method is proposed to calculate the weights of each evaluation factor. Nine primary influencing factors, including slope height, which are easily obtainable, were selected as evaluation factors. By referencing the "Technical Requirements for Geological Hazard Investigation" and previous research findings, grading intervals for each evaluation factor were determined. The corresponding comprehensive cloud model was generated using the MATLAB programming platform. According to the value of each evaluation factor before sliding, the cloud model’s characteristic parameters for weight inversion were obtained. And the cloud model for evaluating the stability of the newly failed slope was established. The Python language and the Qt Designer tool were used to develop the application of stability evaluation. The stability of a newly failed slope in Lengshui Village, Yongchun County, Fujian Province, during November 3-8 2016, was assessed using this application. The result align closely with the actual on-site conditions, validating the accuracy of the proposed evaluation method. The efficient runtime of the application further demonstrates its speed.