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2024 7th International Conference on Mechanical, Electrical and Material Application, MEMA 2024

作者： Zhang, Xingjian Fan, Jinjuan Liu, Changkui Ye, Jinfa Peng, Ruiqi AECC Beijing Institute of Aeronautical Materials Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation Beijing100095 China Fujian LEADASIA New Material Limited Company Fujian Quanzhou362000 China

In fiber reinforced composites (FRP), silicon carbide fiber is indispensable. Its mechanical properties determine the performance of ceramic matrix composites. Therefore, the tensile and fracture behavior of silicon carbide fiber monofilaments should be studied in depth. In order to make the test results of fiber properties more accurate, this paper takes SiC fiber monofilament as the research object, carries out tensile tests at different deflection angles, and carries out WEIBULL statistical analysis and comparison of the data. The microscopic morphology of the tensile fracture of each single fiber was observed by SEM, and the change rule of the mechanical properties and fracture behavior of the fiber with the deflection angle was summarized, and whether the slight deflection affected the test results was explored. The results showed that: (1) The mechanical properties of SiC fiber monofilament decreased gradually with the increase of deflection angle, and the extent of decline gradually increased. (2) With the increase of deflection angle, the proportion of stepped fracture gradually increases, and that of flat fracture gradually decreases. © Published under licence by IOP Publishing Ltd.

关键词： Fracture

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Peroxymonosulfate enhanced photoelectrocatalytic oxidation of organic contaminants and simultaneously cathodic recycling of silver

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Journal of Environmental sciences 2022年第10期34卷 74-83页

作者： Huixin Shao Xia Li Juanjuan Zhang Xu Zhao Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Beijing Capital Co.Ltd. Beijing 100028China

Degradation of organic contaminants with simultaneous recycling of Ag+from silvercontaining organic wastewater such as photographic effluents is desired. Although photoelectrocatalysis(PEC) technology is a good candidate for this type of wastewater, its reaction kinetics still needs to be improved. Herein, peroxymonosulfate(PMS) was employed to enhance the PEC kinetics for oxidation of phenol(PhOH) at the anode and reduction of Ag^(+) at the cathode. The degradation efficiency of phenol(PhOH, 0.1 mmol/L) was increased from 42.8% to 96.9% by adding 5 mmol/L PMS at a potential of 0.25 V. Meanwhile, the Ag(by wt%)deposited on the cathode was 28.1%(Ag_(2)O) in PEC process, while that of Ag(by wt%) was 69.7%(Ag^(0)) by adding PMS. According to the electrochemistry analysis, PMS, as photoelectrons acceptor, enhances the separation efficiency of charges and the direct hoxidation of Ph OH at the photoanode. Meantime, the increasing cathode potential avoided Hevolution and strongly alkaline at the surface of cathode, thus enabling the deposition of Ag+in the form of metallic silver with the help of PMS. In addition, PMS combined with PEC process was effective in treating photographic effluents.

关键词： Peroxymonosulfate Photoelectrocatalysis Organic contaminants degradation Silver recycling Photographic effluents

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Grouping bi-chi-squared method for pulsar navigation experiment using observations of Rossi X-ray timing explorer

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Chinese Journal of Aeronautics 2023年第1期36卷 386-395页

作者： Haifeng SUN Jianyu SU Zhongwen DENG Lirong SHEN Weimin BAO Xiaoping LI Liansheng LI Zhe SU Wencong WANG School of Aerospace Science and Technology Xidian UniversityXi’an 710126China Shaanxi Key Laboratory of Space Extreme Detection Xi’an 710126China Peng Cheng Laboratory Shenzhen 518000China Academy of Advanced Interdisciplinary Research Xidian UniversityXi’an 710126China Beijing Institute of Control Engineering Beijing 100190China Institute of Space Electronic Information Technology Xi’an 710100China Shandong Institute of Aerospace Electronic Technology Yantai 264032China

X-ray pulsar-based navigation is a revolutionary technology which is capable of providing the required navigation information in the solar system. Performing as an important pulsar-based navigation technique, the Significance Enhancement of Pulse-profile with Orbit-dynamics(SEPO)can estimate orbital elements by using the distortion of pulse profile. Based on the SEPO technique,we propose a grouping bi-chi-squared technique and adopt the observations of Rossi X-ray Timing Explorer(RXTE) to carry out experimental verification. The pulsar timing is refined to determine spin parameters of the Crab pulsar(PSR B0531+21) during the observation periods, and a short-term dynamic model for RXTE satellite is established by considering the effects of diverse *** results suggest that the position and velocity errors are 16.3 km(3σ) and 13.3 m/s(3σ) with two adjacent observations split by one day(exposure time of 1.5 ks), outperforming those of the POLAR experiment whose results are 19.2 km(3σ) and 432 m/s(3σ). The approach provided is particularly applicable to the estimation of orbital elements via using high-flux observations.

关键词： Model buildings Navigation analysis Navigation testing Pulsars RXTE observations

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Natural variation of CT2 affects the embryo/kernel weight ratio in maize

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Journal of Genetics and Genomics 2025年第3期52卷 432-440页

作者： Yumin Zhang Sihan Zhen Chunxia Zhang Jie Zhang Xiaoqing Shangguan Jiawen Lu Qingyu Wu Lynnette M.A.Dirk A.Bruce Downie Guoying Wang Tianyong Zhao Junjie Fu State Key Laboratory for Crop Stress Resistance and High-Efficiency Production College of Life SciencesNorthwest A&F UniversityYanglingShaanxi 712100China The Key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxi 712100China State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Seed Science and Technology Research Center Beijing Innovation Center for Seed Technology(MOA)Beijing Key Laboratory for Crop Genetic ImprovementCollege of Agronomy and BiotechnologyChina Agricultural UniversityBeijing 100193China School of Management Science and Real Estate Chongqing UniversityChonging 400045China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Department of Horticulture Seed BiologyCollege of AgricultureFood and EnvironmentUniversity of KentuckyLexingtonKY 40546USA

Embryo size is a critical trait determining not only grain yield but also the nutrition of the maize *** to the present,only a few genes have been characterized affecting the maize embryo/kernel ***,we identify 63 genes significantly associated with maize embryo/kernel weight ratio using a genome-wide association study(GWAS).The peak GWAS signal shows that the natural variation in Zea mays COMPACT PLANT2(CT2),encoding the heterotrimeric G proteinαsubunit,is significantly associated with the Embryo/Kernel Weight Ratio(EKWR).Further analyses show that a missense mutation of CT2 increases its enzyme activity and associates with *** function of CT2 on affecting embryo/kernel weight ratio is further validated by the characterization of two ct2 mutants,for which EKWR is significantly ***,the key downstream genes of CT2 are identified by combining the differential expression analysis of the ct2 mutant and quantitative trait transcript analysis in the GWAS *** addition,the allele frequency spectrum shows that CT2 was under selective pressure during maize *** study provides important genetic insights into the natural variation of maize embryo/kernel weight ratio,which could be applied in future maize breeding programs to improve grain yield and nutritional content.

关键词： Maize Embryo size GWAS CT2 Natural variation

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Inhibition of Wnt activity improves peri-implantation development of somatic cell nuclear transfer embryos

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National science Review 2023年第9期10卷 163-179页

作者： Yanhe Li Caihong Zheng Yingdong Liu Jincan He Qiang Zhang Yalin Zhang Xiaochen Kou Yanhong Zhao Kuisheng Liu Dandan Bai Yanping Jia Xiaoxiao Han Yifan Sheng Jiqing Yin Hong Wang Shuai Gao Wenqiang Liu Shaorong Gao Shanghai Key Laboratory of Maternal Fetal Medicine Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital Shanghai Institute of Maternal-Fetal Medicine and Gynecologic OncologyShanghai Key Laboratory of Signaling and Disease Research Frontier Science Center for Stem Cell ResearchSchool of Life Sciences and Technology Tongji University CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of Genomics Chinese Academy of Sciences and China National Center for Bioinformation Key Laboratory of Animal Genetics Breeding and Reproduction of the MARA National Engineering Laboratory for Animal Breeding College of Animal Science and Technology China Agricultural University

Somatic cell nuclear transfer(SCNT) can reprogram differentiated somatic cells into *** pre-implantation development of SCNT embryos has greatly improved,most SCNT blastocysts are still arrested at the peri-implantation stage,and the underlying mechanism remains ***,we develop a 3D in vitro culture system for SCNT peri-implantation embryos and discover that persistent Wnt signals block the naive-to-primed pluripotency transition of epiblasts with aberrant H3K27me3 occupancy,which in turn leads to defects in epiblast transformation events and subsequent implantation ***,manipulating Wnt signals can attenuate the pluripotency transition and H3K27me3 deposition defects in epiblasts and achieve up to a 9-fold increase in cloning ***,single-cell RNA-seq analysis reveals that Wnt inhibition marke dly enhances the lineage developmental trajectories of SCNT blastocysts during peri-implantation ***,these findings reveal diminished potentials of SCNT blastocysts for lineage specification and validate a critical peri-implantation barrier for SCNT embryos.

关键词： SCNT reprogramming implantation Wnt naïve pluripotency primed pluripotency epiblast single-cell RNA-seq epigenetic barrier

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Proteomic and phosphoproteomic analysis reveal threonine deficiency increases hepatic lipid deposition in Pekin ducks via reducing STAT phosphorylation

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Animal Nutrition 2023年第2期13卷 249-260页

作者： Yong Jiang Zhong Zhuang Wenqia Jia Zhiguo Wen Ming Xie Hao Bai Yulin Bi Zhixiu Wang Guobin Chang Shuisheng Hou Guohong Chen College of Animal Science and Technology Yangzhou UniversityYangzhou 225009China State Key Laboratory of Animal Nutrition Key Laboratory of Animal(Poultry)Genetics Breeding and ReproductionMinistry of Agriculture and Rural AffairsInstitute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China Joint International Research Laboratory of Agriculture and Agri-Product Safety the Ministry of Education of ChinaInstitutes of Agricultural Science and Technology DevelopmentYangzhou UniversityYangzhou 225009China Key Laboratory of Feed Biotechnology of Ministry of Agriculture and Rural Affairs Institute of Feed ResearchChinese Academy of Agricultural SciencesBeijing 100081China

Dietary threonine(Thr)deficiency enhances triglyceride(TG)deposition in the liver of Pekin ducks,which injures hepatic function and impairs growth ***,the underlying molecular mechanisms remain *** the present study,we investigated the effects of dietary Thr deficiency on the expressions of proteins and phosphoproteins in liver of Pekin ducks,to identify the underlying molecular changes.A total of 300 one-day-old ducklings were divided into 3 groups with 10 replicates of 10 *** ducks were fed corn-wheat-peanut meal diets containing 0.46%,0.71%,and 0.96%Thr,respectively,from 1 to 21 days of *** performance,serum parameters,hepatic TG content,and expression of genes involved in lipid metabolism of Pekin ducks were determined.A Thr deficiency group(Thr-D,0.46%Thr)and a Thr sufficiency group(Thr-S,0.71%Thr)were selected for subsequent proteomic and phosphoproteomic *** results showed that Thr-D reduced the growth performance(P<0.001),and increased the plasma concentrations of cholesterol,high-density lipoprotein cholesterol,low-density lipoprotein cholesterol,and hepatic TG(P<0.05).Thr-D increased gene expression related to fatty acid and TG synthesis(P<0.05).A total of 176 proteins and 259 phosphosites(containing 198 phosphoproteins)were observed to be differentially expressed as a result of *** upregulated proteins were enriched in the pathway related to amino acid metabolism,*** down-regulated proteins were enriched in linolenic and arachidonic acid metabolism,and the Janus kinase-signal transducer and activator of transcription(JAK-STAT)signaling *** upregulated phos-phoproteins were enriched in the pathways related to fatty acid biosynthesis,fructose and mannose metabolism,and glycolysis/***-D reduced the phosphorylation of STAT1 at S729 and STAT3 at S728,and expression of *** contrast,Thr-D increased non-receptor tyrosine-protein kinase(TYK2)expression and STAT1 phosphoryla

关键词： Threonine deficiency Triglyceride accumulation Proteomic Phosphoproteomic Pekin duck

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Fast least-squares prestack time migration via accelerating the explicit calculation of Hessian matrix with dip-angle Fresnel zone

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Petroleum science 2022年第3期19卷 1031-1047页

作者： Bo-Wu Jiang Jiang-Jie Zhang Hao Zhang Wen-Kai Lu College of Mechanical and Electrical Engineering Beijing University of Chemical TechnologyBeijing100029China The Institute for Artificial Intelligence(THUAI) Beijing100084China State Key Laboratory of Intelligent Technology and Systems Beijing100084China Beijing National Research Center for Information Science and Technology(BNRist) Beijing100084China The Department of Automation Tsinghua UniversityBeijing100084China Key Laboratory of Petroleum Resource Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing100081China

Amplitude versus offset analysis is a fundamental tool for determining the physical properties of reservoirs but generally hampered by the blurred common image gathers(CIGs).The blurring can be optimally corrected using the blockwise least-squares prestack time migration(BLS-PSTM),where common-offset migrated sections are divided into a series of blocks related to the explicit offsetdependent Hessian matrix and the following inverse filtering is iteratively applied to invert the corresponding ***,calculating the Hessian matrix is *** present a fast BLS-PSTM via accelerating Hessian calculation with dip-angle Fresnel zone(DFZ).DFZ is closely related to optimal migration aperture,which significantly attenuates migration swings and reduces the computational cost of ***,our fast BLS-PSTM is implemented as a two-stage ***,we limit the aperture for any imaging point with an approximated the projected Fresnel zone before calculating the Hessian ***,we determine whether a seismic trace contributes to the imaging point via DFZ during calculating the Hessian *** tests on synthetic and field data validate the distinct speedup with higher-quality CIGs compared to BLS-PSTM.

关键词： Prestack time migration Fresnel zone Hessian Least squares migration Migrated gather

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Straightforward Guess and Determine analysis Based on Genetic Algorithm

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Journal of Systems science & Complexity 2022年第5期35卷 1988-2003页

作者： CAO Chunping CEN Zhe FENG Xiutao WANG Zhangyi ZHU Yamin Department of Computer Science and Technology University of Shanghai for Science and TechnologyShang-hai 200093China Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Cyber Science and Engineering Wuhan UniversityWuhan 430072China School of Science Xi'an Technological UniversityXi'an 710021China

With the development of artificial intelligence,the genetic algorithm has been widely used in many *** cryptography,the authors find it is natural to code an individual and design its fitness in a genetic algorithm for a straightforward guess and determine analysis(SGDA,in short).Based on this observation,the authors propose an SGDA based on genetic *** it with the other three SGDAs based on exhaustive search,MILP method and CPP method respectively,the authors illustrate its effectiveness by three stream ciphers:Small scale SNOW 2.0,medium scale Enocoro-128v2 and large scale *** results show our method is significantly superior to them,especially for Trivium,the method can find a solution of 165 variables in less than one hour,while the other three methods are not applicable due to its enormous search space of size 2^(619.37).As far as we know,it is a best solution in an SGDA for Trivium so far.

关键词： Enocoro-128v2 genetic algorithm guess and determine analysis SNOW 2.0 trivium

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Secondary electron emission yield from vertical graphene nanosheets by helicon plasma deposition

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Chinese Physics B 2022年第2期31卷 613-617页

作者： Xue-Lian Jin Pei-Yu Ji Lan-Jian Zhuge Xue-Mei Wu Cheng-Gang Jin School of Physical Science and Technology Soochow UniversitySuzhou 215006China Provincial Key Laboratory of Thin Films Soochow UniversitySuzhou 215006China Soochow University Analysis and Testing Center Suzhou 215006China Laboratory for Space Environment and Physical Sciences Harbin Institute of TechnologyHarbin 150001China

The secondary electron emission yields of materials depend on the geometries of their surface *** this paper,a method of depositing vertical graphene nanosheet(VGN)on the surface of the material is proposed,and the secondary electron emission(SEE)characteristics for the VGN structure are *** COMSOL simulation and the scanning electron microscope(SEM)image analysis are carried out to study the secondary electron yield(SEY).The effect of aspect ratio and packing density of VGN on SEY under normal incident condition are *** results show that the VGN structure has a good effect on suppressing SEE.

关键词： secondary electron emission secondary electron yield vertical graphene nanosheets scanning electron microscope

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Occurrence and potential risks of organophosphate esters in agricultural soils:A case study of Fuzhou City,Southeast China

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Journal of Environmental sciences 2025年第4期150卷 571-581页

作者： Tao Wang Hong Zhang Chong Huang Yujie Ben Hanlin Zhou Hangting Guo Yonghe Han Yong Zhang Ping Tong Fujian Key Laboratory of Pollution Control and Resource Reuse College of Environmental and Resource SciencesFujian Normal UniversityFuzhou 350117China Laboratory for Earth Surface Processes Ministry of EducationCollege of Urban and Environmental SciencesPeking UniversityBeijing 100871China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Fujian College Association Instrument Analysis Center Fuzhou UniversityFuzhou 350007China

Fifty agricultural soil samples collected from Fuzhou,southeast China,were first investigated for the occurrence,distribution,and potential risks of twelve organophosphate esters(OPEs).The total concentration of OPEs(ΣOPEs)in soil ranged from 1.33 to 96.5 ng/g dry weight(dw),with an average value of 17.1 ng/g ***,halogenated-OPEs were the predominant group with amean level of 9.75 ng/g dw,and tris(1-chloro-2-propyl)phosphate(TCIPP)was the most abundant OPEs,accounting for 51.1%ofΣ*** concentrations of TCIPP andΣOPEs were found to be significantly higher(P<0.05)in soils of urban areas than those in suburban *** addition,the use of agricultural plastic films and total organic carbon had a positive effect on the occurrence of OPE in this *** positive matrix factorization model suggested complex sources of OPEs in agricultural soils from *** ecological risk assessment demonstrated that tricresyl phosphate presented a medium risk to land-based organisms(0.1≤risk quotient<1.0).Nevertheless,the carcinogenic and noncarcinogenic risks for human exposure to OPEs through soil ingestion and dermal absorption were *** findings would facilitate further investigations into the pollution management and risk control of OPEs.

关键词： Organophosphate esters(OPEs) Agricultural soils Spatial distribution Source identification Risk assessment

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