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It is critical to develop the methods and technologies of studying the species and concentration in the processing of adsorption, and diffusion of some important radionuclides in spent fuel waste processing such as Beishan granites in domestic institutions and universities for the geological disposal of high-level radioactive wastes. Enrich the models used or constructed and the calculation procedures developed in the past two decades in this field. In order to evaluate the safety of the repository, chemical speciation analysis of nuclides is the premise of research to accurately predict the migration behavior of nuclides. In view of the rapid development of China's nuclear energy industry and the need to establish the identification of nuclides in the environment, it is of great significance to carry out the study of the chemical forms of nuclides around the repository in China. Aiming at the research requirements of element speciation distribution in the environment, a set of B/S architecture element speciation distribution simulation software is developed with JAVA as the development tool, MySQL as the database, and Tomcat as the container. In order to solve the convergence problem of chemical reaction equilibrium nonlinear equations encountered in simulation calculation, the method based on chemical reaction potential energy is introduced to solve the chemical reaction nonlinear equations quickly, and the multi-phase equilibrium calculation can be expanded. SSCS was used to study the species of U in groundwater and the effects of Eh, pH, different ions and concentrations. The calculation results indicate that neptunium mainly exists as NpO2CO-3(aq) in groundwater. Under strong acidic conditions, neptunium maily exists as NpO+2(aq), while in weak acidic, neutral or weak alkaline conditions, the main species are NpO+2(aq) and NpO2OH.When the solution is in strong alkaline conditions, the species are complicated most of neptunium exists as NpO2(CO3)-3(aq), with the possible generation of NpO2(CO3)3-2 or NpO2(CO3)5-3. Np(Ⅴ) is stable in the reduction condition, while Np(Ⅳ) and Np(Ⅵ) are the possible generation. Comparing the neptunium calculation results of the software in the environment with the PHREEQC calculation results, the relative error is within 10 %. For the distribution of trace elements in the environment, a theoretical calculation solution is provided.

Cutting fluid wastewater contains a large amount of emulsified oil. If it is discharged directly without treatment, it will cause environmental pollution and water ecosystem destruction. In order to efficiently separate oil-in-water emulsion wastewater and reduce membrane fouling, polyvinylidene fluoride (PVDF) hollow fiber membrane with good membrane-forming property, stable mechanical properties and good chemical resistance was used as the support, the amino group of cysteamine was introduced to the membrane surface, and then amidated with the carboxyl group of methacrylic acid, and followed by forming a cyclic polymer functional layer through a free radical polymerization reaction, thus PVDF-based composite membrane with good hydrophilicity, large flux and high oil-water separation rate was obtained. The physical and chemical properties of the modified films were characterized by infrared spectroscopy (IR), scanning electron microscopy (SEM) and water contact angle. The separation effect of n-hexane-in-water emulsion and cutting fluid wastewater was tested by self-made cross-flow filtration device. The results show that the water contact angle (WCA) of the original membrane (M0) is 91.95°, while the WCA of the modified membrane M1, M2 and M3 decrease to 65.78°, 51.08° and 71.70°, respectively, indicating that the hydrophilicity of the modified membrane is improved. The permeation fluxes of M0, M1, M2 and M3 for n-hexane-in-water emulsion are 37.34, 58.40, 81.57, 44.55 L·m-2·h-1, respectively. The water fluxes for cutting fluid and wastewater separation are 7.41, 11.96, 24.36, 10.80 L·m-2·h-1, respectively. The fluxes of the original membrane and the modified membrane in separating high concentration cutting fluid wastewater decrease, but the permeation flux of the modified membrane is obviously higher than that of the original membrane, and the permeation flux of M2 modified membrane is the best, which indicates that the modified membrane has the best hydrophilicity and anti-pollution ability, and is expected to be used in the treatment of industrial oily wastewater.

Currently, the engineering thematic maps used in coal mines are mostly CAD drawings. Extracting data efficiently from CAD drawings and quickly organizing them into geographic information system (GIS) services, thereby supporting the creation of mine spatial objects and business attribute expansion, integrating real-time safety production data are the key to building a coal mine GIS one-map. The implementation process of converting CAD drawings into GIS services based on the ArcGIS platform is cumbersome. The ArcGIS platform has high costs and cannot run well across platforms. In order to solve the above problems, a coal mine GIS one-map rapid construction platform has been designed. The platform includes three major functional modules: CAD drawing management, map service publishing, and thematic map management. The CAD drawing management module is used for basic information management and status tracking of drawings. The map service publishing module is used for map packaging and online preview. The thematic map management module is used for map service management, mine object creation, and attribute extension. Based on the open design alliance (ODA), the Teigha for Java SDK is used to achieve precise recognition and fast and accurate extraction of all elements in CAD drawings. By constructing a hierarchical description model for coal mine CAD drawing data based on GIS data features, rapid storage of all element data in CAD drawings has been achieved. Following the object-oriented design approach, a web-based coal mine CAD drawing dataset storage interface and thematic map service publishing platform are developed under the Spring Cloud framework, achieving rapid construction of coal mine GIS one-map. Taking the mining engineering plan of a certain coal mine as an example, traditional methods and fast construction platforms are used to construct coal mine GIS one-map. The comparison results show that the fast construction platform can significantly improve the efficiency of constructing coal mine GIS one-map, providing a spatiotemporal digital base for the intelligent construction of coal mines.

【Objective】 This study delves into the mechanisms underlying the damage and failure of concrete linings in hydraulic channels in cold regions in Northern China that are prone to freeze-thaw, wind and sand erosion. 【Method】 We prepared concrete samples, in line with canal system engineering standards, using solid waste fly ash and silicon powder sourced from Inner Mongolia. Our investigation focused on the freeze-thaw-wind-sand erosion of the concrete lining when it is laid in different directions and the consequential impact on its service life. 【Result】 ①Wind-sand erosion exacerbates freeze-thaw damage in the concrete lining within. The extent of slurry erosion on the channel concrete surface intensifies with the increase in erosion angle. The most severe surface damage occurs when the wind-sand erosion angle was 90°, accelerating surface slurry shedding and internal damage, which is twice as severe as when the angle was 30°. ②The degradation of the eroded surface showed a distinctive fractal pattern. The combined effects of freeze-thaw-wind-sand erosion initiated small pores which then propagated to larger pores. ③Based on material decay and grey theory, we proposed an GM (1,1) grey model to predict the relative dynamic elastic modulus and a model to predict of serve life of the concrete under cycled freeze-thaw erosion under various wind-sand erosion angles. 【Conclusion】 The service life of the hydraulic concrete lining diminishes as the wind-sand erosion angle increases, with a substantial reduction to 25.83 years when exposed to 90° wind-sand erosion.

With the gradual maturation of virtual computer technology, it is increasingly used in real life to represent its effects realistically. The connection between arts and crafts and digital technology is getting closer. To bring new opportunities to the development of arts and crafts, virtual reality technology and augmented reality technology is integrated to establish a 3D arts and crafts virtual design model with visualized interactive arts and crafts design as the core. In the visualized virtual scene with the support of a craft knowledge base, the coordinates of virtual design tools, original objects inside the tools, and other points are derived according to the pick-up points. By repeating “delete current scene - generate new scene”, the design of arts and crafts is realized. After the verification of properties, performance, and satisfaction, the process error of the virtual design model is only 1.57mm, the average design cycle is 5.91 hours, and the labor cost, pre-preparation cost, and design cost are 214.66 RMB, 100 RMB, and 20 RMB respectively, which are significantly lower than the traditional design mode. Furthermore, the average scoring value of designers for different forms of arts and crafts is greater than 8 points, which is more satisfying with the application effect of the model. The model is connected to design practice with the help of virtual technology, which not only improves work efficiency and saves material and labor consumption but also facilitates the optimization of design solutions and the extension of solution serialization.

A new robotic calligraphy system is constructed to address the problem of robotic calligraphy systems that only consider robotic writing in the straight state of the brush pen, enabling robots to write Chinese characters in the tilted state. A linear regression algorithm-based stroke model suitable for robotic brush writing is developed. Then a genetic algorithm is used to obtain trajectory information from the stroke images, and rules for starting, walking, and closing strokes are added to generate virtual stroke images. Finally, the B spline algorithm was used to realize the robot path planning and coordinate transformation to complete the pose calculation and perform the actual writing. The results show that the width of the pairs of strokes deepens as the stroke depth increases and the stroke speed decreases, corresponding to six sets of experimental speeds from 20mm/s to 120mm/s at stroke depths of 3mm and 7mm, respectively. From this, it can be seen that the relative error of most points is smaller than 10%, and the maximum relative error reaches 79.08%. The higher error was due to its lower benchmark value after comparison, which led to a huge error. In particular, as the independent variable increases in the experiment, making the benchmark value increase, its relative error decreases significantly, indicating the accuracy of the fitted model derived. It can be seen that the linear regression model-based robotic calligraphy copying technique helps to improve the robot’s purely repetitive trajectory in the writing process, adding its writing style to the original one and making it closer to humans.

Background and objectivePrevious studies have shown that patients with psoriasis are at higher risk of developing chronic kidney disease (CKD) and end-stage renal disease (ESRD) compared with general population; however, data on the differences in the occurrence of CKD and ESRD between patients with psoriasis and non-psoriatic controls are limited and inconsistent. The aim of this study was to carry out a comparison of the probability of suffering CKD and ESRD in patients with or without psoriasis by conducting a meta-analysis of cohort studies.MethodsCohort studies on PubMed, Web of Science, Embase and Cochrane Library by March, 2023 were searched for. The studies were screened according to pre-established inclusion criteria. Hazard ratios (HRs) and a 95% confidence intervals (CIs) for the renal outcomes among patients with psoriasis were calculated using the random-effect, generic inverse variance method. Subgroup analysis was related to the severity of psoriasis.ResultsA total of seven retrospective cohort studies were included, including 738,104 psoriasis patients and 3,443,438 non-psoriasis subjects, published from 2013 to 2020. Compared to controls without psoriasis, patients with psoriasis had an increased risk of CKD and ESRD, with pooled hazard ratios of 1.65 (95% CI, 1.29–2.12) and 1.37 (95% CI, 1.14–1.64), respectively. Besides, the incidence of CKD and ESRD is positively correlated with the severity of psoriasis.ConclusionThis study showed that compared to patients without psoriasis, patients with psoriasis, especially those with severe psoriasis, had a significantly increased risk of developing CKD and ESRD. Considering the limitations of this meta-analysis, more high-quality and well-designed studies are needed in the future to validate our findings.

"Place identity" is an important concept that measures personal place emotion and reflects the complicated dynamic relationship between personal identity and one's local environment. Enterprise communities (ECs) are a major type of gated, walled-off residential spaces. They were built and managed mostly by the state or collectively owned enterprises during the planning economy period, and many are still employed in urban China. Understanding the place identity of EC residents is of great significance for community renewal, neighborhood revitalization, and sustainable urban development. Using the Northwestern First Printing and Dyeing Factory community as a typical example, this paper uncovers the changes and mechanisms of personal place identity under the influence of social environment changes and community transformation using grounded theory, while discussing its policy implications. The main results are as follows: first, 13 open coding items, such as cognitive change of identity, reduced familiarity, weakened social interaction, and dilapidated housing construction were defined; further, four axial codings, including personal identity changes, emotional memory changes, identity change in social life, and physical environment identity, were set, and an analysis framework on the change of residents' place identity in the ECs (selective coding) was built. Second, the residents' personal awareness in ECs has changed from Danwei people in the era of planned economy to social people in the market economy period and to left-behind elderly groups in the future. Third, inherited collective memory maintains the residents' positive place identity. Alienation of social interaction and socialization of community management weaken place identity. The dilapidated material environment and backward support facilities cause the residents to experience negative identity. Fourth, residents build their own and local identity in the interaction between the EC environment and society that accompanies their life and growth, and the identity changes along with the variation of external social environment and internal individual characteristics. External factors such as state-owned enterprise reform and housing policies have led to enterprise transitions and changes in social space in the ECs, affecting residents' emotional experience and identity. Internal factors such as length of residence, individual characteristics, psychological factors, and individual experiences all have an effect on identity. These jointly shape the residents' place identity and can alter its processes. Finally, this work is helpful in providing insight into socialist work-unit communities for Chinese transformation and renewal, deepens the understanding of traditional residential space succession theory arising from residential suburbanization, residential segregation, inner-city renewal, gentrification, and polarization of living space, enriches the case types of place identity theory in view of the unique value and function of the ECs, and provides a reference to carry out the renewal of old communities more successfully.

With the rapid development of the new energy industry, distributed generation (DG) is connected to the power grid on a large scale, and the traditional relay protection scheme is no longer suitable for modern power systems. In order to solve this problem, this paper establishes a mathematical model of the equivalent circuit of distributed photovoltaic power supply according to the external characteristics of photovoltaic cells, and analyzes its volt-ampmeter characteristics and voltage output characteristics of power supply. On this basis, it analyzes and puts forward the control mode of DG when the distribution network is faulty. On the basis of the study, this article has double feeder distribution network as an example, the analysis when the line fault occurring at different extents of DG connected to different position on the influence of the distribution network current protection, the results show that when answering DG side in the feeder bus for distribution network of current protection, pick a smaller effect on both ends of feeder, has a certain symmetry. Finally, the accuracy of theoretical analysis is verified by establishing a simulation model in PSCAD.

In this work, we study the corrosion performance of coatings prepared by electrical explosion spraying of metal wires. 316L metal wire with a diameter of 1.5 mm is used as spray material, and the coating is prepared on the 45# steel substrate by electrical explosion spraying. The oil–water corrosion experiment of the coating is carried out in a constant temperature water bath of 60°C for 168 h. The scanning electron microscopy and energy-dispersive spectroscopy results of the experimental samples have shown that some metal oxides are found inside the coating, most of which are distributed at the grain boundaries with a size range of 30–50 nm. The corrosion rate of the coating is measured by weight loss method with a corrosion rate of 0.079 mm/annum. XRD results show that the corrosion generates CaCO3, Fe3O4, and MgFe2O4. Coating corrosion is mainly caused by the formation of electrochemical corrosion between oxides and non-oxides in the coating, and pitting corrosion and intergranular corrosion in the presence of chloride ions.

Nanophotonic devices, composed of metals, dielectrics, or semiconductors, enable precise and high-spatial-resolution manipulation of electromagnetic waves by leveraging diverse light–matter interaction mechanisms at subwavelength length scales. Their compact size, light weight, versatile functionality and unprecedented performance are rapidly revolutionizing how optical devices and systems are constructed across the infrared, visible, and ultraviolet spectra. Here, we review recent advances and future opportunities of nanophotonic elements operating in the ultraviolet spectral region, which include plasmonic devices, optical metamaterials, and optical metasurfaces. We discuss their working principles, material platforms, fabrication, and characterization techniques, followed by representative device applications across various interdisciplinary areas such as imaging, sensing and spectroscopy. We conclude this review by elaborating on future opportunities and challenges for ultraviolet nanophotonic devices.

In order to optimize the raw material formula and processing technology of Guiling fortified rice noodle,L9(34) orthogonal test was used to study the effects of the four factors on product quality and processing efficiency including water content of flour,the amount of corn starch,the amount of concentrate extracted from food materials and the amount of spice powder,when the comprehensive score of cooking quality,sensory quality,rehydration rate and processing effect was take as the evaluation index.The results showed that the effect was as follows:water content of flour＞amount of corn starch＞amount of food material extract concentrate＞amount of spice powder.The optimum formula was as follows:when the rice flour was 100 kg,the moisture content of the flour was 40%,the amount of edible corn starch was 10 kg,the amount of food material extract concentrate was 1.5 kg,and the amount of spice powder was 0.4 kg.Under these conditions,good processing effect and good product quality could be obtained.

To solve some common problems, such as uneven color, half-cooked rice, coarse bubbles, adhesion, breaking, high water content, molds, low yields, etc in the processing of dry rice flour, the reason summary analysis was carried out from the raw materials and processing technique. Meanwhile, some solutions are put forth according to the present author’s experience in production practice. For example: Investment in science and technology should be increased to promote automation, intelligence, modernization, scale and standardization of equipment and technology, thereby promoting the studies and application of new craftwork, new technology, and new equipment. At the same time, new products and new consumption patterns will be created, thus enlarging consumption and increasing economic benefits.

Introduction Haemophilia A is a rare inherited bleeding disease caused by the deficiency of coagulation factor VIII (FVIII). The main treatment protocol is to administer regular exogenous FVIII concentrate infusions. With the discovery of variability in individualised pharmacokinetics (PK) and bleeding phenotype, the previous weight-based approach needs to be replaced by more advanced PK-tailored prophylaxis with an accurate evaluation system. In this study, we combine individualised PK profiles and a complementary evaluation system to guide prophylaxis in paediatric patients with haemophilia A.Methods and analysis This is a single-centre, prospective single-arm study. The aim of this study is to assess the effectiveness of a new strategy combining PK and a complementary evaluation system to treat haemophilia A in Chinese paediatric patients. Sixty paediatric patients with haemophilia will be recruited. After PK testing, they will receive a PK-guided stepup prophylaxis in the next 2 years. The dosing regimen will be determined according to individualised PK profiles and complementary evaluation findings. Related indicators at the end of the study will be compared with the values at treatment initiation to examine the effectiveness of this new strategy. The demographic data of the investigated patients will be summarised by descriptive statistics. Quantitative data will be described by summary statistics, including arithmetic median, range, mean and arithmetic SD. Analyses will use t-test to compare indicators such as bleeding rate and imaging score at both ends of the study as well as during follow-up.Ethics and dissemination The study has been approved by the Ethics Committee of Beijing Children’s Hospital (Number 2020-Z-095). The findings will be presented at international meetings such as World Federation of Hemophilia World Congress. Related manuscripts will be submitted to peer-review journals such as Blood and Hemophilia.Trial registration number ChiCTR2000037821; Pre-results.

Body temperature is an essential physiological index reflecting human health. Accurate measurements of body temperature play a vital role in the diagnosis and treatment of diseases. In this paper, a temperature sensor manufactured by laser-induced graphene is introduced. This sensor has high measurement accuracy, simple preparation, and low production cost. The sensor is made of laser-induced graphene and is easier to fabricate and operate than traditional thermal resistance sensors. The sensor is of high accuracy, is easy to manufacture, and is of low cost. The sensor has high accuracy and is linear between 30°C and 40°C in the human body temperature ranges. Laser-induced graphene (LIG) sensor’s resistance value is correlated linearly with the temperature value, and compared with the infrared thermometer, the accuracy of the sensor is ±0.15°C while that of the infrared thermometer is ±0.30°C. The sensitivity of the LIG sensor is −0.04145%°C−1.

A novel bio-based flame-retardant thermosetting vinyl ester resin monomer was synthesized from castor oil. The chemical structures of the monomer was characterized by FTIR and 1H-NMR. In order to improve its rigidity and expand its application in the field of bio-based materials, it was mixed with certain proportions of another reactive bio-based VER monomer, which had rigid and strong polar groups, and then a series of copolymers were prepared with thermal curing method. Then their tensile property, hardness, morphology of fractured surface, flame retardant property, DMA and thermostability were all investigated. The results indicated that the copolymers had relatively high tensile strength of 11.2 MPa, and the limiting oxygen index is above 23% in all prepared copolymers. DMA demonstrates that the glass transition temperature of the cured resins is up to 56.1°C. Thermogravimetric analysis shows that the copolymers have excellent thermal stability.

Calcium and zinc salts of dimer fatty acids (DFA-Ca and DFA-Zn) were synthesized using direct neutralization and metathesis technologies, respectively. The adduct of maleic anhydride and methyl eleostearate (MAME) was also converted to the corresponding zinc soap (C22TA-Zn) and calcium soap (C22TA-Ca) by the two different synthetic routes. Mixed Ca/Zn salts between DFA-Ca and DFA-Zn, and between C22TA-Zn and C22TA-Ca were used as thermal stabilizers for poly(vinyl chloride) (PVC). The PVC thermal stability was determined using Congo red test, discoloration test, torque rheological analysis and TGA. Dynamic mechanical properties were also tested. Results indicated that the DFA-Ca/DFA-Zn thermal stabilizer from direct neutralization technology was found to be superior to that of the metathesis product. The C22TA-Ca/C22TA-Zn thermal stabilizer from direct neutralization method had overall superior thermal stability, and displayed modulus and glass transition comparable to that of metathesis product. Direct neutralization method was more excellent and convenient than metathesis technology.

The CAN bus is a serial communication network using the CAN protocol. The microcontroller of C8051F041 is a highly integrated mixed-signal system-on-a-chip with an integrated CAN bus controller. The article describes in detail how to implement remote update of all MCU Flash under the same CAN bus network. The result shows that all MCU Flash in the same bus network can be remotely updated. Only CAN bus is needed for update and no additional Connected. Program maintenance and maintenance costs can be effectively reduced in industrial control networks.