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Dianchi Lake urban wetland park in Kunming is an important component of Dianchi lakeside wetlands, it is of great significance to the urban development and ecological protection of Kunming. To solve the problem of non-point source pollution of Dianchi Lake basin, the Dianchi Lake Pan-Asian International Urban Wetland Park is taken as an example, the rapid artificial infiltration treatment system and the comprehensive constructed wetland treatment system were designed for Dianchi Lake urban wetland park, and various design parameters and its influencing factors have been analyzed. After the deep treatment by the treatment system, the water quality reached the standards of landscape water. The planning of water system for Dianchi Lake urban wetland park provides a reference for designing plateau lake urban wetland parks.

This paper first introduces the basic theory of CFD method, including basic control equations, finite volume method, control equation solving algorithm and turbulence model selection. Second, based on OpenFOAM, an open-source fluid mechanics software, a numerical simulation method of vertical axis tidal turbine was proposed by using k-ω SST turbulence model and PIMPLE algorithm. The hydrodynamic characteristics of the vertical axis turbine were studied, and the calculation results were compared with experiments. The higher consistency proves the feasibility of the numerical simulation method proposed in this paper. Finally, the influence of inlet turbulence on numerical simulation was explored, and a set of effective CFD simulation strategies was concluded, which provided a valuable reference for future CFD simulation and research on vertical axis tidal turbines.

The proposal to build the “Yangtze River Golden Waterway” strategy has enabled the shipbuilding volume of the Yangtze River trunk to grow rapidly. With the increase of ship traffic flow, the Yangtze River water traffic safety is facing severe challenges. This paper draws on the road traffic black spots and existing research methods of water traffic accidents and the definition of water traffic black spots. The DBSCAN algorithm and the accident-level weighted average method are used to establish the blackpoint identification model for waterborne traffic. The model is applied to the Yangtze River mid-stream Wuhan Port 2013-2017 water traffic safety accident as an example. Ten black spots and corresponding boundaries are identified. The black point analysis method used in this paper can effectively quantitatively analyze the spatial distribution and characteristics of water traffic black spots, which can provide a new theoretical basis for ensuring the safety of water traffic.

The immune system plays an essential role in aging. Polygala fallax Hemsl. (PFH) enhances the immune response and promotes immune function. The study aimed to investigate whether PFH had a positive effect on the immune function of aging mice to delay aging. Kunming mice were selected to establish an aging mouse model by intraperitoneal injection of D-galactose at 500 mg/kg/day for 6 weeks. Astragalus membranaceus, which has been used as one of the positive control groups. After modeling, A. membranaceus low, medium, and high doses of PFH were administered by gavage for 4 weeks, Serum superoxide dismutase (SOD) and malondialdehyde (MDA) levels were evaluated using enzyme-linked immunosorbent assay. Flow cytometry was used to determine T-cell subsets and the expression of CD38, CD95, and PD-1 in peripheral blood. Prism 9.5.1 statistical software for classification analysis was used with all data expressed in (¯x ± s). One way ANOVA was further used to detect statistically significant differences between group. Results revealed that serum SOD activity was decreased and MDA content was elevated in the MODEL group compared with those in the CONTROL group. A. membranaceus and PFH increased SOD activity and decreased MDA content. Furthermore, the expression of CD38, CD95, and PD-1 in CD4+ and CD8+ T cells was increased in the MODEL group compared with those in the CONTROL group. CD38, CD95, and PD-1 expression decreasing trend after the administration of A. membranaceus and PFH. Among them, CD38, CD95, and PD-1 were the most significantly reduced in PFH-L group. It is therefore concluded that PFH had a positive effect on CD4+ and CD8+ T-cell function in aging mice, which could delay aging to a certain extent.

The article defines the content of the training process of hydrologists and the need to develop and use digital resources in it. The main difficulty in the realization of such an approach is the complexity of the processes under study due to their hard-to-predict changes in states under the influence of many heterogeneous factors, duration in time and the scope of consequences. The solution to this problem is the use of digital resources, which are based on simulation models capable of recreating the behavior of a real object in a virtual environment and predicting changes from the given conditions of external influence with a certain accuracy. Based on this, a model of the learning process has been developed. It includes digital resources that implement scenarios of water object behavior in addition to traditional methods and means of training. The use of such tools provides a practice-oriented approach to training and efficient use of resources for educational activities.

At present, the construction industry is changing the traditional architectural design mode and construction method, in order to ensure the quality of the project, save resources and reduce costs while building green buildings, energy saving and emission reduction. As a result, assembly building is becoming the mainstream of the current development of the construction industry. This paper takes an assembly residential building as an object to conduct an example study, discusses the assembly building construction process and its difficulties, and the results are favorable to provide reference for assembly building construction and related construction difficulties.

The study of flexural load capacity of small radius steel plate composite girder bridges is of great academic and engineering value. This study is based on an actual engineering project and modelled by MIDAS finite element software, aiming to explore the limit states of load carrying capacity of small radius steel plate girder bridges under various conditions. The results show that under different radii of curvature, the flexural performance of the inner and outer main girders is similar, and as the radius of curvature increases from R100 to R400, the maximum positive stress of the combined girder bridge changes less and does not exceed its resistance value, revealing the low sensitivity of flexural load carrying capacity to the radius of curvature. While the load carrying performance of inner and outer main girders is still similar when examining different calculated span diameters, the adverse effect of the positive temperature gradient on the flexural performance is more obvious, which makes the flexural load carrying capacity show a high sensitivity to the change of the calculated span diameter. Finally, when different numbers of main girders are considered, the positive stress values of each main girder are similar, and the sensitivity of the flexural capacity to the number of main girders remains low despite the relatively unfavourable effect of the positive temperature gradient. The study of flexural capacity of small-radius steel plate composite girder bridges is of great significance for the structural design and safety assessment of bridges.

Yang Yuhuan is a controversial consort from ancient China. From historical records to literary works and even contemporary film and television dramas, the image of Yang Yuhuan has been constantly reshaped. However, in the fields of stage drama and film and television works, there has been relatively limited scholarly research on her image, with even fewer touching on arts and cultural management. This paper adopts a feminist perspective to analyze the evolution of Yang Yuhuan’s image over different periods, taking her drama and film portrayals as the study subjects. The aim is to explore how, in the current societal context, one might enrich the image of Yang Yuhuan from the standpoint of arts management. Through this research, the author observes that the underlying representation of Yang Yuhuan is that of a beautiful and nation-damaging favored consort. Notably, such an image is not merely the result of personal choice but a collective product of power and knowledge. In recent years, China’s art market has seen abundant creative representations of Yang Yuhuan, but innovations concerning her image have been scant, largely adhering to its original mold. This does not align with contemporary societal and cultural norms and fails to meet audience demands. Therefore, to further diversify the image of Yang Yuhuan, creators should transcend her traditional objectified portrayal, emphasize the unique political aspects of her love story with Emperor Li Longji, reconsider the notion that “a woman can cause the downfall of a nation,” and collaboratively innovate her image through arts management.

Liupanshui city is located in the western part of Guizhou province, the region is extremely rich in coal resources, coal industry is more concentrated, coal mining and processing and other aspects of the solid waste resources if the good use of the city of Liupanshui city will get new development opportunities. The article takes the solid waste resources of coal industry in Liupanshui city as the research object, and uses the hierarchical analysis method to measure and evaluate the factors affecting the comprehensive utilisation of the solid waste resources of coal industry in Liupanshui city. The evaluation results show that the comprehensive utilisation of coal-based industrial solid waste resources in Liupanshui city is affected by the investment amount of solid waste per unit, technological maturity, industrial policy, and friendliness to the atmosphere. Countermeasures are proposed for these four constraints in anticipation of improving the comprehensive utilisation of coal-based industrial solid waste resources in Liupanshui city.

This article utilizes panel data from 2005 to 2020, covering 21 cities in Sichuan Province, to empirically examine the relationship between agricultural industry concentration and carbon emissions. The findings reveal a clear inverted U-shaped relationship between agricultural industry agglomeration and carbon emissions. This relationship also exhibits temporal lag and regional disparities. In Sichuan Province, the link between agricultural industry agglomeration and carbon emissions follows this inverted U-shaped pattern, emphasizing the need for a comprehensive understanding of agglomeration's role in shaping emissions. Carbon emissions in agriculture display strong temporal path dependence, underscoring the importance of timely policies for carbon reduction. Local governments should adapt their strategies to regional peculiarities, promoting the growth of local agricultural industries through increased scale and agglomeration. A well-planned distribution of agricultural industries across regions is essential for sustainable development.

The Long Short-Term Memory network of deep learning neural network is widely used to predict stock price in financial field. In order to optimize the accuracy of stock price prediction by LSTM network, this paper firstly uses principal component analysis method to extract various influencing indexes of stock. Then, use Circle mapping method to select the initial value more evenly, use sine and cosine factors to improve factors of particle swarm optimization algorithm, so as to find the optimal parameters of LSTM model more effectively. Finally, the optimization results of IPSO algorithm are substituted into the LSTM model for the regression prediction with the principal components. Through empirical analysis and comparative test, the results show that the improved particle swarm optimization algorithm proposed in this paper has better optimization effect, is not prone to local optimal problems, and the prediction model based on this method has higher prediction accuracy.

The traditional bus bay stops are prone to ponding, with reduced waiting comfort, low traffic efficiency and easily damaged pavement structure. Given the problem, based on the sponge design of the bay stop in northern China, the rainstorm flood management model under the traditional and sponge modes is constructed, and the runoff condition of the bus stop is analyzed. The results show that the combination design of LID facilities, such as permeable pavement and the recessed green belt has a good control effect on rainwater runoff in the stop section. The larger the range of LID measures adopted in the stop section, the more pronounced the runoff control effect. The combined design of sponge facilities can effectively control rainwater runoff. However, with the increase in rainfall intensity, the control effect of sponge measures on rainwater runoff at the bus stop gradually decreases.

Microplastics are widely distributed in a variety of environments, absorbing heavy metals in the environment while aging due to various environmental factors. In this paper, the effects of different aging factors (pH, DOM, and H2O2) on the adsorption capacity of heavy metals Cu and Zn on polyethylene microplastics (PE-MPs) were investigated, and the changes in physical and chemical properties of PE microplastics were analyzed. The results demonstrate that H2O2 aging bears the greatest effect on the adsorption effect of PE microplastics, dissolved organic matter (DOM) aging has the least effect on the adsorption effect of PE microplastics, and the adsorption effect of microplastics aged with pH=9 is stronger than that aged with pH=4; the adsorption kinetics model of microplastics fitted to the pseudo-second-order kinetic model, and the thermodynamic model fitted to Langmuir model; aging mainly changed the surface structure of microplastics, increased the Zeta potential of microplastics, introduced more oxygen-containing functional groups, and finally affected the ability of microplastics to adsorb heavy metals. The research provides data reference for understanding the influence of different aging on the adsorption capacity of heavy metals in microplastics.

In order to develop a kind of APAP double-release pellet capsules, which was prepared with the manual filling method, the immediate and sustained release pellets of a certain proportion were prepared by the fluidized bed coating and the extrusion spheroidization process, respectively. It was founded that both the prepared immediate-release pellets and sustained-release pellets had smooth and round surfaces. The particle size distribution ranged evenly from 16 to 35 mesh. Response surface plots showed that the optimal preparation prescription for immediate-release pellets were that ethanol concentration (X1) 70%, APAP 20%, MCC (X2) 40%, PVP K30 (X3) 20%, and sucrose pellet core 20%; and the optimal preparation prescription for sustained-release pellets were that HPMC concentration (X*3) 6.5%, APAP 30%, EC (X*1) 20%, MCC (X*2) 40%, PVP K30 4%, and lactose 6%. The results of pharmacokinetic analysis revealed that, after the APAP double-release pellet was orally administered, compared with that of conventional tablets, the plasma APAP levels in the blood circulation dramatically rose to significant peaks as a result of the quick and slow release of APAP from the capsules, which significantly prolonged the effective time of drugs in blood. Finally, immediate and sustained antipyretic-analgesic effects were obtained.

This paper introduces the vehicle fuel cell system and EMC test methods, and systematically analyses the research progress of EMC test standards for the automotive industry and fuel cell system. Taking the air compressor controller of the fuel cell system as an example, this study puts forward a method for formulating the electromagnetic compatibility test standard of the vehicle fuel cell system, and gives suggestions for formulating the relevant series of standards.

The system uses the OpenMV algorithm module combined with the k-means framework through the Euclidean distance formula to facilitate the automation of logistics sorting, which identifies the color of logistics parcels in the LAB color space. It sends the identified color information to the motion drive module, which sorts and transports the logistics parcels to the designated storage area. The fusion of algorithms allows the system to identify colors and transportation accurately.

Le présent article est consacré à la problématique des registres de langue en rapport avec l’enseignement du français. Cette notion clé est d’abord révisée du point de vue de la linguistique pour exposer la complexité terminologique, elle est ensuite examinée sous l’angle de la sociolinguistique en vue de justifier la diversité des usages de la langue liés aux facteurs socio-culturels. Dans l’optique de l’approche communicative, le traitement des registres de langue dans l’enseignement du français doit intégrer l’objectif central de travailler la compétence de communication.

By considering the symbiosis between rest behavior with charging behavior during intercity traveling, the inconvenience of battery electric vehicles (BEVs) confined by the battery capacity can be relieved. This paper proposed a quantitative analysis method for revealing this phenomenon from an accessibility perspective. This proposed method involved a calculation model of intercity travel time for electric vehicle by considering the current configuration of electric vehicle charging facilities and energy consumption with travel speed. Based on the highway network and charging pile network in Beijing-Tianjin-Hebei region, a case study has been analyzed to verify the feasibility of the model. The results show that the accessibility performance of BEVs and fuel vehicles is close in Beijing Tianjin Hebei region, which has relatively perfect charging facilities. And by joint the charging behavior and rest behavior, there is almost no difference between BEV models with a large range and advanced charging technology and fuel vehicles in intercity travel. In addition, the charging facilities along the expressway in the region can basically satisfy the experience of intercity travel for BEVs, and further increasing the number of charging stations cannot significantly improve the accessibility of electric vehicles.

The remote online system of heavy-duty vehicles is composed of vehicle terminal and monitoring platform based on the specified communication protocol, data format and data transmission frequency, which is an important embodiment of heavy-duty vehicle pollution control in the application for Internet of Vehicles. The influence of different collection frequencies and compute cycles on vehicle energy consumption and emission calculation is studied in this paper. The calculation errors of mileage, vehicle fuel consumption per 100 kilometers and emission factors of 14 collection frequencies and 7 compute cycles were calculated by continuously monitoring the emission and energy consumption data for 10 heavy-duty vehicles uploaded in 1 month. The result shows that decreasing the data collection frequency will lead to the increase of error and the decrease of correlation, while increasing the computing cycle can reduce the error. When the calculation error is 1%, 5% and 10%, the collection frequency shall be at least 0.5Hz, 0.2Hz and 0.1Hz, and the computing cycle shall be greater than 1800 seconds, 3600 seconds and 7200 seconds. The study content of this paper provides the theoretical foundation for the application and storage of remote monitoring data of heavy-duty vehicles, and provides a solution to the waste of data storage space caused by the problem of remote monitoring big data set.

At present, the research on ecological civilization city construction in China is in the stage of blooming. The evaluation of ecological civilization, the indicator system and the implementation path are all in the preliminary stage of research, and a unified and complete understanding has not yet been formed. The purpose of this paper is to study the informatization construction of ecological civilization evaluation based on data mining technology. On the basis of a comprehensive understanding of the current research status of the development of ecological civilization, using the combination of subjective and objective screening methods, comprehensively considering the construction of ecological civilization, the evaluation index system suitable for the construction of ecological civilization is analyzed. This paper builds an ecological civilization evaluation system based on data mining technology, uses the system to evaluate the efficiency of ecological civilization construction in M province, and guides the construction of ecological civilization in China. Through the evaluation results, it enriches the understanding of ecological civilization construction, and scientifically grasps development advantages, providing the government with accurate and effective evaluation tools.

The purpose of this study is to establish a novel, simple and rapid surface-enhanced Raman spectroscopy (SERS) detection technology for fenamidone. Fenamidone is a fungicide widely used with curative activity against oomycete diseases. Gold nanoparticles (AuNPs) were prepared by improved trisodium citrate reduction method of chloroauric acid. As a surface-enhanced Raman scattering (SERS) active colloid, the optimized product had the advantages of high sensitivity, reproducibility and chemical stability. The Results showed that the detection limit of fenamidone adsorbed on AuNPs was 0.01 mg/kg. The linear response between SERS intensity and logarithmic concentration was R2 = 0.9562. The method was preliminary applied in tobacco sample and showed its potential to serve as an alternative rapid quantification method of fenamidone residues with simplicity, efficiency, high accuracy and precision.

Thermo-activated Building Systems is an energy-efficient envelope insulation technology. In this paper, the Modular Thermo-activated Building Systems (MTABS) is proposed to enable flexible installation and maintenance of embedded pipe. Two scaled-down experimental rooms of the same size were built, in which the normal energy-saving wall (NW) and the MTABS wall were applied to the south-facing wall respectively. The MTABS for impacting on the indoor thermal environment and energy saving were measured in continuous low-grade heat injection mode under winter outdoor conditions in Hefei, and were analyzed in comparison with the NW. Experimental results show that MTABS can effectively improve the indoor thermal environment. The average temperature difference between indoor and outdoor of MTABS is 6.72 °C higher than that of NW; when the heat source temperature is 25 °C, the cumulative daily heat fluxes of MTABS is 44.0 kWh·m-2, which providing auxiliary indoor heating while significantly reduces energy consumption.

Using firm-level data of Chinese manufacturing enterprises between 1998 and 2007, we investigate the existence and channels of “learning by outward FDI”. Difference-in-differences estimation reveals that productivity of Chinese parent firms is significantly improved by their outward foreign direct investment and the learning effects form a “V” shape in the following years. There is no significant difference in learning effects between state-owned enterprises and non-state-owned enterprises; neither do we find any evidence that investing in countries with advanced technology gives more learning effects. In addition, we find that learning effects mainly come from technology transfer, technology spillovers and an enlarged production scale.

In the current period when the highway industry is accelerating the improvement of infrastructure construction and implementing new development concepts, the construction of green service area is an important part of promoting the high-quality development of highway transportation infrastructure. Based on the study of the connotation of the green service area, in order to provide experience and reference for its construction and transformation, this article put forward the content of the construction of green service area, and further combined the comprehensive survey of service areas of a certain province in central China, analysed and summarized current situation of green construction technologies from aspects of location and land use, buildings, environmental protection facilities, and renewable energy utilization.

This article uses the design analysis and insights of the Weiping Tourism Cultural Street, which the author participated in and practice to discuss how Huizhou culture can be protected and inherited in tourism cultural projects. Through the planning of the buildings of the project and the site planning of the surrounding environment, the formation of public spaces such as traditional streets, traditional theaters, as well as the influence of Huizhou culture on the space and architectural style and details of the building, the article interprets in detail the application of Huizhou architectural design and its traditional cultural connotations in cultural tourism development projects. At the same time, the article also discusses and summarizes the problems encountered in the protection and inheritance of Huizhou culture in the design and development process of the project, which has an enlightening effect on the better integration of the current practice of new Huizhou architecture with the current social and economic environment.

In view of the problem of huge computations and multiple solutions, a method for optimizing and accelerating the progress of history matching by using material balance analysis was established. Based on simple measuring data, such as average pressure, daily production rate and PVT test, a material balance model can be constructed for a three phase system of hydrocarbon reservoir. According to the material balance calculation, original oil in place and aquifer parameters can be obtained as optimized parameters for numerical simulation, which contributes to solve the multi-solutions problem of history matching. Besides, by conducting uncertainty analysis using Monte-Carlo simulation method, one can determine the adjustment range of input parameters, which helps the engineer definite a clear direction, reduce the number of computations and consequently accelerate the progress of history matching. The reliability of the proposed method was verified according to two examples.

This paper introduces the structure of the existing on-line monitoring system, and analyzes the problems of poor compatibility and reliability of IED in different manufacturers. Then it gives two ways to transform the on-line monitoring system of substation equipment to the Internet of things, which is to retain IED and to remove IED. On this basis, this paper introduces the application scenarios of the on-line monitoring system of substation equipment connected to the Internet of things, including accurate perception of equipment status, accurate evaluation of equipment status and intelligent research and judgment of equipment status.

For now, many hospitals that require nurses to move patients by hand from stretchers to a hospital bed, so a design of stretcher with auxiliary functions of lateral positioning and transferring for immobilized patients, which is a mechanical mechanism consisted of rigid rods, joints and sliders, was designed to help the nurses to move patients between beds and reduce their workload. Driven by motors, the rigid rods can be rotated, stretched or shortened so that the entire stretcher bed board can archive to a proper posture and position. In this paper, the following objectives will be achieved: (i) Create a schematic of the mechanism and describe the principles and functions (ii) the calculation of inverse kinematics, forward kinematics, dynamics (including energy), and PD control in the mechanism (iii) The motion process of simulating the mechanism using MATLAB (iv) Using MATLAB to create the plots of angle, torque, and position state (v) Using SolidWorks to construct the prototype and to implement the motion simulation of the mechanism (vi) Describe the practical application and future Extensions of this mechanism.

Under the current situation of prevention and control Corona Virus Disease 2019(COVID-19), the development of fitness industry in Liuzhou is analyzed, and the survival environment, management, coaches' quality and reasons for the closure of the club are analyzed. The results show that Liuzhou fitness market is greatly affected by the economic and social environment, and the seemingly prosperous fitness market has met with bottlenecks, and its operation is in danger. Taking “Internet+” as a new power engine, we should build a service platform of Liuzhou fitness alliance, strengthen the supply side reform such as management and coach quality, increase effective supply of high quality, and guide clubs to play their own advantages to develop differentiated competition, which is an effective way to promote the transformation and upgrading of traditional fitness industry.

GIS is prone to various defects and faults after putting into operation, and the failure rate is high. At present, the inspection methods of GIS in operation include traditional inspection mode, two-dimensional code inspection mode, radio frequency identification technology mode and robot inspection mode. However, the current inspection robot has the disadvantages of weak adaptability to complex environment, insufficient inspection scope, low efficiency and low intelligence. Therefore, this paper designs a GIS monitoring system based on the rail robot. By installing all kinds of sensors on the rail robot, with the help of binocular vision and mechanical arm, the omni-directional live detection of GIS in transit can be realized.

Compared with the traditional reactor abnormal state detection method, the acoustic vibration detection method combines the advantages of acoustic detection and vibration detection, which has the advantages of simple installation, strong portability and good signal integrity, and has a broad application prospect. In this paper, the characteristic parameters of reactor acoustic vibration, including sound pressure level, sound power level, acoustic signal spectrum, vibration amplitude, vibration acceleration value, vibration signal spectrum, harmonic proportion and frequency complexity, are obtained to analyze the range and distribution rule of each characteristic parameter under long-term operation condition of reactor, and the weight factor of each characteristic parameter is determined by analytic hierarchy process On the basis of fuzzy reasoning, the state evaluation model of reactor is established.

Although the state evaluation method based on characteristic parameters and weight factors can extract the characteristic quantities in time domain and frequency domain according to the collected acoustic and vibration signals of reactors, it is necessary to analyze a large number of test data to establish the functional relationship between the characteristic quantities and the defect states, and to establish the function relationship between the characteristic quantities and the defect states, and to establish the function relationship between the characteristic quantities and the defect states The method can directly learn the data samples, and self-study the correlation rules of characteristic parameters and defects through the training of neural network. In this paper, the deep learning neural network model is constructed, and the data obtained from reactor defect simulation experiment and field measurement are used as samples to train the deep learning network. Through the training of neural network, the characteristics of acoustic vibration signal are automatically learned, and the characteristics are stored in the parameters of neural network. Finally, the state of reactor is realized by the classifier at the end of the network assessment

Passive building is a kind of building that can use natural way to reduce energy consumption on the premise of satisfying indoor comfort. The characteristics of energy saving and emission reduction can solve the problem of energy shortage, which is the future development trend of buildings in the Yangtze River Delta region. However, the popularization of passive architecture in the Yangtze River Delta region is relatively slow in recent years. This paper analyzes its development status and influencing factors, and puts forward some suggestions to provide some reference for promoting the explosive development of passive buildings in the Yangtze River Delta region.

Industrial parks cover a variety of production capacities and energy-consuming entities, with large load demand and complex energy-using structure, and common problems such as low energy utilization efficiency and unreasonable energy structure. The construction of an integrated energy system (IES) with a combined cooling, heating and power system as the core unit in the industrial park is of great significance for achieving reliable, efficient and clean energy use in the park. Therefore, this article is based on the integrated energy system of the industrial park, aims at the lowest total cost of park operators, and considers the constraints of grid node balance, equipment output and energy storage equipment, and constructs source-grid-load-storage linkage operation optimization model, and build a chaotic particle swarm algorithm (CPSO) to solve the model. Finally, a typical industrial park in my country is taken as an example to analyze the scientificity of the model.

In the present study, a plant regeneration system was established by using young leaf explants from aseptic seedlings of Cassia mimosoides. The results showed that when the explants were inoculated on the 1/2MS medium contained 2.0 mg/L 6-BA and 0.5 mg/L NAA, high rate of callus induction and good growth status of adventitious bud, and the highest number of buds were obtained. Further studies conclusively suggested that IBA could not promote root formation effectively, but the root regeneration could be induced by NAA. However, although the rooting of regeneration buds could be induced when adventitious buds were placed into 1/2MS medium supplemented with 0.5 mg/L NAA, the rate of rooting was reduced, and the roots became shorter. Therefore, the best medium for adventitious bud regeneration using young leaf as explants in C. mimosoides was 1/2MS medium contained 2.0 mg/L 6-BA and 0.5 mg/L NAA, and the best rooting medium was 1/2MS.

At persent, multi expandable patching can’t be operated below the patched period of casing damage wells, a varible diameter expandable cone has been designed, so expandable tools can be put into wells with small diameter and expanded with large diameter which can achieve the purpose of patching for casing damage wells for many times. The indoor prototype testing showed that the tools had a suitable structure, start-up pressure was 3–5MPa,complete closure pressure was 52MPa,maximum overall diameter increased from 188 mm to 220 mm, with the same size of conventional expandable cone, expandable rate was 17.02%.The research results showed that expandable force increases linearly with the increase of thrust, expandable tools could be put into wells with small diameter and expanded with large diameter with the help of variable diameter expandable cone, it should have a broad application prospect after rudcing the closure pressure.

The tensile properties of fiber-reinforced composites (FRP) under various factors of composite aging were studied by tensile test. The test parameters mainly include temperature, salt spray, ultraviolet, rainwater, and stress. The results show that the higher the temperature, the faster the FRP tensile strength decreases; At the same temperature, the ultraviolet radiation has little effect on BFRP bars. Salt spray and rainwater hydrolyze the resin on the surface of the steel bars and expose the inner steel bars. Stress can accelerate the degradation of tensile properties of FRP bars. It has little effect on the elastic modulus of FRP bars. A scanning electron microscope (SEM) was used to observe the changes of steel bars and the mechanism of mechanical property degradation was studied

Injecting polymer materials is an important means to improve the ultimate recovery, maintain stable production and improve the development effect of the oil field in the high water cut period. However, in the development process of polymer flooding, with the continuous increase of the cumulative polymer injection, the problem of high-pressure under-injection frequently occurs in the injection well. In this paper, based on geological characteristics and plugging material analysis, the causes of high pressure/under-injection and production characteristics of different types of measure wells. To study and optimize the rubber breaking, degradation and synergistic acidification liquid system that are applicable to different blockage conditions can effectively improve the adaptability of the blockage liquid system; Meanwhile, the formation of a quick plugging process with the characteristic of “single-stage single-step injection + prescription formula structure” can effectively improve the success rate of polymer plugging process measures, providing strong technical support for polymer flooding technology.

Cyclo crosslinked polyphosphazenes (PPNs) were prepared by Hexachlorocyclotriphosphazene (HCCP) with unique P = n structure and active p-cl group and green compound phloretin. The synthesis pro cess of polyphosphazene nanospheres with Hexachlorocyclotriphosphazene as the main body and phloretin was discussed. The effects of pH value and solid-liquid ratio of solution on the adsorption of uranium by pol yphosphazene nanospheres were studied. The results show that polyphosphazene nanospheres are off white powder in appearance and spherical in microstructure. When the pH value of the solution is 4 and the solid-l iquid ratio is 0.5g ·L-1, the maximum adsorption rate of uranium is obtained.

Early clinical, multi clinical and repeated clinical has always been one of the key contents of practice teaching reform of medical image technology, and also one of the basic requirements of the post-experience reform. Combined with the requirements of national policy and vocational education, medical imaging technology students of our department regularly enter the imaging departments of different levels of hospitals for the post-experience activities through freshmen and sophomores. The results show that this practice teaching activity can cultivate students’ clinical thinking of imaging technology, doctor-patient communication ability, practical operation ability and improve self-learning ability, and lay a solid foundation for students ’ internship and employment. It is well received by employers and students all the time to cultivate the comprehensive quality of students majoring in imaging technology and systematically understand the clinical situation of the specialty by using post-experience practice teaching. It is worth combining the national policy, the needs of grass-roots employers and the actual situation of the Department to continue the in-depth development and continuous optimization, and effectively promote the cooperation of medical and education, jointly educate people and serve primary health care.

With the development of renewable energy technology, integrating a variety of renewable energy integrated energy systems can effectively solve the problem of optimizing the scheduling of buildings with high energy consumption and fast growth rate. Based on the modeling and analysis of various energy equipment in the system, the integrated energy system of building buildings, based on the demand response compensation price, with the lowest construction operating cost as the goal function, establishes the optimization scheduling model of building-level integrated energy system based on demand response, and uses the particle group algorithm based on cloud model improvement to optimize the solution of the model. The study is introduced for simulation to compare the two different modes of participation in demand response, and the optimal performance of cloud model particle group algorithm and elementary particle group algorithm. The results show that the cloud model particle group algorithm model based on demand response can effectively save the operating cost of the building-level integrated energy system, and reduce the power grid side load peak and valley difference.

For distribution systems where wind sources are poor, low-wind-speed wind turbines (LWTG) plays an important role in improving the security, economy and reliability of the system. However, the stochastic volatility of LWTG output and loads poses a challenge to the technology of distribution network reconfiguration. Considering the uncertainty of LWTG output, photovoltaic output and changes of load in multiple continuous periods, a dynamic robust reconfiguration model is established. The optimization target is to minimize the three-phase current unbalance and network loss. The model solving process combines the Latin hypercube sampling-based Monte Carlo method, the Semi-invariant method and the compound differential evolution algorithm. The influence of LWTG on the reconfiguration results is explored based on the modified IEEE34-node simulation system, and the performance of the proposed dynamic robust reconfiguration method is then verified.

As the rapid growth of photovoltaic (PV) generation capacity, the form of regional PV power integrated by multiple PV plants is becoming more and more common. The changing law of regional PV power is of great significance to control the operation of the power system. This paper presents a novel regional PV power point forecast method that uses the convolutional neural network (CNN) model. In the method, the structure of CNN is applied to extract the nonlinear features between the input data and regional PV power. The forecast of regional PV power in a real power grid is carried out to illustrate the validity of the proposed method. Verification results show that the CNN model can provide more accurate point forecast for regional PV power results than the traditional regional PV power forecast methods.

Safety standards are foundation for the deployment and development of hydrogen industry. In this paper, standards for hydrogen safety published by ISO, IEC and SAC are summarized and discussed. Standard framework of hydrogen safety is analysed. ISO standards are mainly focused on general safety standards and safety standards of hydrogen production. IEC standards are mainly focused on safety standards of fuel cell and fuel cell applications. China has basically established a safety standard framework for hydrogen industry. Safety standards for different stage of hydrogen industry are discussed and analysed. Suggestions of safety standards preparation for China are proposed.

In this study, the young leaves of Cassia mimosoides were used as explants. On the basis of 1/2 MS +2.0 mg/L 6-BA +0.5 mg/L NAA medium, we observed the effect of adding different factors on the callus induction of C. mimosoides. The results shown that after 20 days of callus induction, it was found that the addition of 150 mg/L vitamin C (VC) did not affect the induction efficiency, but the growth of callus became slower; and when the concentration was higher than 150 mg/L, the formation of callus would be inhibited. The induction of callus would be restrained while adding different concentrations of Cu2+ into mediums. Moreover, glutamine (Gln) had little effect on the induction of callus. Furthermore, the addition of hydrolyzed casein (CH) would not affect the formation of callus, but the high concentration of CH could affect the growth status of callus. The induction efficiency of callus was severely inhibited by exogenous addition of silver nitrate (AgNO3), and the growth status of callus was poor, and the phenomenons of early rooting had happened at the same time. The results of this study provided a theoretical basis for the subsequent optimization of bud proliferation and rooting in C. mimosoides.

In view of the lack of coordination or guidance of green road concept and relevant evaluation to encourage sustainability, we redefined the concept of green road and its characteristics, and then reviewed some cross-sector targets of various departments related to green development. The history of green road related policies and studies were reviewed, and a green road evaluation indices system were established with 2 broad categories-compulsory and selective. The compulsory category contains 8 indices; and the selective category includes 76 indices, which are divided into 7 categories and 31 subcategories, covering design, construction and operation. In order to improve the evaluation continually, rating principles, grading methods and main reference literature were given. Then we selected 30 indices and design in a questionnaire to trial evaluation, and 11 projects of Hubei province were collected and used for analysis. Finally, based on the long-term and complexity of the evaluation system, we suggest some key improving strategies of green road evaluation in China. The establishment of the green road system is an attempt to bridge the requirements of different departments, and to stimulate the progressing technology to meet various challenges.

The water resource is the basic natural resource and one of the controlling factors of the ecological environment. However, for China with extensive economic growth and high population pressure, deterioration of water quality has been a very serious problem. This research will focus on five main provinces along the Yangtze River, one of the richest and most economically developed areas in China. The data of lakes in five provinces is mainly from China Lake Scientific Database and the study chooses and analyzes four elements of the lake: nitrogen content, phosphorus content, dissolved oxygen content and pH value. These four elements represent water quality or reflect the source of pollution. By R studio, both the ANOVA test and regression equation are used to indicate four elements’ relationship among each other in the whole five provinces and each province’s water quality and use condition. Jiangsu’s average dissolved oxygen content is the highest among the five provinces and is supposed to have the highest water quality because of the strong self-purification ability of water. However, since it also owns the most developed industry seen from data of the number of industrial enterprise and industrial wastewater, lakes in Jiangsu have the highest average nitrogen and phosphorus content. Anhui has low dissolved oxygen content which can harm the production in the fishery. The pH value of lakes in Jiangxi is much lower than that of lakes in other provinces. Jiangxi province suffers from acid rain all year- round, which causes the acidification of groundwater and surface lakes.

Hydrogen storage and transportation are the intermediate link of hydrogen production and the point of end-use. Standards for hydrogen storage and transportation published by ISO, CGA, NFPA, ASME, ANSI, SAC, CEN and JISC are reviewed and analysed in this paper. Numbers of standards for hydrogen embrittlement are more than the others. Standards for hydrogen piping and pipelines are only published by CGA and ASME. Chinese GB standards are mainly focused on general design and safety, gaseous hydrogen receptacles and hydrogen embrittlement. Standards for liquid hydrogen storage receptacles and safety, hydrogen piping and pipelines, and hydrogen transportation should be emphasized.

In this paper, the pavement performance of recycled hot mix asphalt with 30% recycled asphalt pavement (RAP) content is studied by mix design, splitting test, freeze-thaw splitting test and dynamic modulus test. The results show that the recycled hot mix asphalt with 30% RAP content has better high-temperature deformation resistance than hot mix asphalt, but low temperature performance is slightly worse, and the water stability is not much different. It is proved that the road performance of recycled hot mix asphalt with 30% RAP content is the same as that of hot mix asphalt. Recycled hot mix asphalt with 30% RAP content can be widely used. The flexural creep test data at different temperatures were fitted to the exponential decay function, which proved that the recycled hot mix asphalt conformed to the generalized Maxwell model, and provided parameters for the establishment and analysis of the viscoelastic mechanical model of the recycled hot mix asphalt.

This article analyzes the factors affecting the nitrification and denitrification sludge granulation, including carbon source abundance, environmental pH, electron acceptors, SRT conditions, reaction temperature, etc. In this paper, the content of impurities in sewage is clarified, and the entire treatment process, COD removal, sludge denitrification and sedimentation, and sludge formation process analysis are analyzed. The purpose is to improve the application value of activated carbon and improve the treatment effect of sewage.