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Numerical Mathematics(Theory,Methods and Applications) 2022年第3期15卷 620-640页

作者： Ting Li changying liu Bin Wang School of Mathematics and Statistics Xi’an Jiaotong University710049 Xi’anChina School of Mathematics and Statistics Nanjing University of Information Science and TechnologyNanjing 210044China

In this paper,we investigate the long-time near-conservations of energy and kinetic energy by the widely used exponential integrators to highly oscillatory conservative *** modulated Fourier expansions of two kinds of exponential integrators have been constructed and the long-time numerical conservations of energy and kinetic energy are obtained by deriving two almost-invariants of the *** examples of the methods are given and the theoretical results are confirmed and demonstrated by a numerical experiment.

关键词： Highly oscillatory conservative systems modulated Fourier expansion exponential integrators long-time conservation

Two-phase early prediction method for remaining useful life of lithium-ion batteries based on a neural network and Gaussian process regression

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Frontiers in Energy 2024年第4期18卷 447-462页

作者： Zhiyuan WEI changying liu Xiaowen SUN Yiduo LI Haiyan LU College of Instrumentation and Electrical Engineering Jilin UniversityChangchun 130021China College of Chemistry Jilin UniversityChangchun 130012China Changsha Automobile Innovation Research Institute of Jilin University Changsha 410006China

Lithium-ion batteries(LIBs)are widely used in transportation,energy storage,and other *** prediction of the remaining useful life(RUL)of lithium batteries not only provides a reference for health management but also serves as a basis for assessing the residual value of the *** order to improve the prediction accuracy of the RUL of LIBs,a two-phase RUL early prediction method combining neural network and Gaussian process regression(GPR)is *** the initial phase,the features related to the capacity degradation of LIBs are utilized to train the neural network model,which is used to predict the initial cycle lifetime of 124 *** Pearson coefficient’s two most significant characteristic factors and the predicted normalized lifetime form a 3D *** Euclidean distance between the test dataset and each cell in the training dataset and validation dataset is calculated,and the shortest distance is considered to have a similar degradation pattern,which is used to determine the initial Dual Exponential Model(DEM).In the second phase,GPR uses the DEM as the initial parameter to predict each test set’s early RUL(ERUL).By testing four batteries under different working conditions,the RMSE of all capacity estimation is less than 1.2%,and the accuracy percentage(AP)of remaining life prediction is more than 98%.Experiments show that the method does not need human intervention and has high prediction accuracy.

关键词： lithium-ion batteries RUL prediction double exponential model neural network Gaussian process regression(GPR)

A Facile Synthetic Approach to 3-Halo-4-substituted-l,5-dihydro-4H-1,2,4-triazoline-5-thiones Based on Retro-Michael Addition

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Chemical Research in Chinese Universities 2017年第4期33卷 587-593页

作者： TIAN He liu Yuqiang LI Xingwei XIE Yafei liu changying WANG Jianwu ZHAO Guilong School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China Eanjin Key Laboratory of Molecular Design and Drug Discovery Eanjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

A facile 3-step synthetic approach to 3-halo-4-substituted-l,5-dihydro-4H-1,2,4-triazolme-5-thiones （la--lk） from corresponding unhalogenated 8a---8i was developed based on the strategy of retro-Michael addition, with the key steps being regioselective S-alkylation of compounds 8a-8i with ethyl 3-iodopropionate（12c） and alkaline cleavage of the propionate protecting group via retro-Michael addition. The synthetic approach was characterized by simplicity of operation and wide substrate scope.

关键词： Synthetic approach Protecting group Triazole Halogenation Regioselectivity Retro-Michael addition

A thermal actuated switchable dry adhesive with high reversibility for transfer printing

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International Journal of Extreme Manufacturing 2021年第3期3卷 74-82页

作者： Shun Zhang Hongyu Luo Suhao Wang Zhou Chen Shuang Nie changying liu Jizhou Song Department of Engineering Mechanics Soft Matter Research Centerand Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang UniversityHangzhou 310027People’s Republic of China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027People’s Republic of China

Transfer printing based on switchable adhesive that heterogeneously integrates materials is essential to develop novel electronic systems,such as flexible electronics and micro LED ***,we report a robust design of a thermal actuated switchable dry adhesive,which features a stiff sphere embedded in a thermally responsive shape memory polymer(SMP)substrate and encapsulated by an elastomeric *** construct bypasses the unfavorable micro-and nano-fabrication processes and yields an adhesion switchability of over1000 by combining the peel-rate dependent effect of the elastomeric membrane and the thermal actuation of the sub-surface embedded stiff *** and numerical studies reveal the underlying thermal actuated mechanism and provide insights into the design and operation of the switchable *** of this concept in stamps for transfer printing of fragile objects,such as silicon wafers,silicon chips,and inorganic micro-LED chips,onto challenging non-adhesive surfaces illustrate its potential in heterogeneous material integration applications,such as flexible electronics manufacturing and deterministic assembly.

关键词： switchable adhesive reversible adhesive transfer printing flexible electronics

Design, Synthesis and Biological Activity of Tetrazole-bearing Uric Acid Transporter 1 Inhibitors

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Chemical Research in Chinese Universities 2017年第1期33卷 49-60页

作者： CAI Wenqing liu Wei XIE Yafei WU Jingwei liu Yuqiang liu changying XU Weiren TANG Lida WANG Jianwu ZHAO Guilong School of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China Tianjin Key Laboratory of Molecular Design and Drug Discovery Tianjin Institute of Pharmaceutical Research Tianjin 300193 P. R. China

Systematic structure-activity relationship（SAR） exploration of a moderately active tetrazole-bearmg lesinurad-based hit If led to the discovery of a potent uric acid transporter I（URAT1） inhibitor li, which possessed a novel molecular skeleton and was 11-fold more potent than the parent lesinurad against human URAT1 in-vitro （IC50=0.66 gmol/L for li vs. 7.18 μmol/L for lesinurad）.

关键词： URAT1 inhibitor Structure-activity relationship Drug discovery Lesinurad Tetrazole Bioisostere

Seed Setting and Its Spatial Characteristics in Tartary Buckwheat(Fagopyrum tataricum)

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Phyton-International Journal of Experimental Botany 2022年第8期91卷 1659-1669页

作者： Dabing Xiang Yue Song Chao Song Yan Wan Xueling Ye changying liu Chenggang Liang Gang Zhao Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsCollege of Food and Biological EngineeringChengdu UniversityChengdu610106China French Associates Institute for Agriculture&Biotechnology of Drylands Jacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevBeersheba84990Israel Research Center of Buckwheat Industry Technology Guizhou Normal UniversityGuiyang550001China

A low seed-setting rate is the main limiting factor influencing Tartary buckwheat production under high-yield cultivation *** investigate the seed setting and its spatial characteristics,two Tartary buckwheat cultivars(high seed-setting rate cultivar Qianku 3;low seed-setting rate cultivar liuku 3)were compared by a two-year field trial in 2017 and *** results showed that the Tartary buckwheat underwent simultaneous flowering and ***,generated from branch,were still blooming during the mature stage of grains on stem,which resulting in a greater number of flowers and grains on the branch than those on the stem at the low part of *** seed-setting characteristics significantly differed between two *** high seed-setting rate of Qianku 3 was 26.6%and 33.2%higher than liuku 3 in 2017 and 2018,***,Qianku 3 showed a higher filled grain number(157.8%)and seed-setting rate(66.4%)on branch than liuku 3.A network analysis showed that the whole-plant seed-setting rate was positively correlated with grain number,which was closely correlated with flower number at the same position of *** path-coefficient analysis revealed that grains number on branches was the most dominant component(Path coefficient(P)=2.19)of the seed-setting rate,followed by grains number on stem(P=0.60).The grains number on branches showed the greatest positive direct effect with significant correlation(r=0.76 and P<0.01)on the seed-setting ***,the present study indicated that the grain number of branches may play a vital role in improving the seed-setting rate in Tartary buckwheat.

关键词： Grain number path-coefficient analysis seed-setting rate tartary buckwheat

Chromosome-level Genomes Reveal the Genetic Basis of Descending Dysploidy and Sex Determination in Morus Plants

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Genomics, Proteomics & Bioinformatics 2022年第6期20卷 1119-1137页

作者： Zhongqiang Xia Xuelei Dai Wei Fan changying liu Meirong Zhang Peipei Bian Yuping Zhou Liang Li Baozhong Zhu Shuman liu Zhengang Li Xiling Wang Maode Yu Zhonghuai Xiang Yu Jiang Aichun Zhao State Key Laboratory of Silkworm Genome Biology Institute of Sericulture and Systems BiologySouthwest UniversityChongqing 400716China Key Laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsChengdu UniversityChengdu 610106China The Sericultural and Apicultural Research Institute Yunnan Academy of Agricultural SciencesMengzi 661100China College of Sericulture Textile and Biomass SciencesSouthwest UniversityChongqing 400716China

Multiple plant lineages have independently evolved sex chromosomes and variable karyotypes to maintain their sessile lifestyles through constant biological *** notabilis,a dioecious mulberry species,has the fewest chromosomes among Morus spp.,but the genetic basis of sex determination and karyotype evolution in this species has not been *** this study,three high-quality genome assemblies were generated for Morus spp.[including dioecious ***(male and female)and Morus yunnanensis(female)]with genome sizes of 301–329 Mb and were grouped into six *** a combination of genomic approaches,we found that the putative ancestral karyotype of Morus species was close to 14 protochromosomes,and that several chromosome fusion events resulted in descending dysploidy(2n=2x=12).We also characterized a~6.2-Mb sex-determining region on chromosome *** potential male-specific genes,a partially duplicated DNA helicase gene(named MSDH)and three Ty3_Gypsy long terminal repeat retrotransposons(named MSTG1/2/3),were identified in the Y-linked area and considered to be strong candidate genes for sex determination or *** genomic analysis showed that Guangdong accessions in China were genetically similar to Japanese accessions of *** addition,genomic areas containing selective sweeps that distinguish domesticated mulberry from wild populations in terms of flowering and disease resistance were *** study provides an important genetic resource for sex identification research and molecular breeding in mulberry.

关键词： Mulberry Karyotype evolution Dioecy Sex determination Population genomics

Growth,ROS Markers,Antioxidant Enzymes,Osmotic Regulators and Metabolic Changes in Tartary Buckwheat Subjected to Short Drought

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Phyton-International Journal of Experimental Botany 2023年第1期92卷 35-54页

作者： Yan Wan Yuan Liang Xuxiao Gong Jianyong Ouyang Jingwei Huang Xiaoyong Wu Qi Wu changying liu Xueling Ye Xiaoning Cao Gang Zhao Liang Zou Dabing Xiang Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSichuan Engineering&Technology Research Center of Coarse Cereal IndustrializationCollege of Food and Biological EngineeringChengdu UniversityChengdu610106China School of Preclinical Medicine Chengdu UniversityChengdu610106China Center for Agricultural Genetic Resources Research Shanxi Agricultural UniversityTaiyuan030031China

Tartary buckwheat(Fagopyrum tataricum)is an important pseudocereal feed crop with medicinal and nutritional *** is one of the main causes of reduced growth and yield in these *** investigated the growth,physiological,and metabolic responses of the widely promoted Tartary buckwheat variety Chuan Qiao No.1 to polyethylene glycol(PEG)-mediated drought *** significantly decreased shoot length,shoot biomass and relative water *** length,malondialdehyde content,electrolyte leakage,activities of superoxide dismutase,peroxidase,catalase and amylase,and contents of soluble sugar,soluble protein and proline were increased by PEG-mediated *** metabolomics analysis identified 32 core metabolites in seedlings subjected to PEG-mediated drought,16 of which increased—including quercetin,isovitexin,cyanidin 3-O-beta-D-glucoside,L-arginine,and glycerophosphocholine,while the other 16 decreased—including 3-methoxytyramine,2,6-diaminopimelic acid,citric acid,UDP-alpha-D-glucose,adenosine,*** 32 core metabolites were enriched in 29 metabolic pathways,including lysine biosynthesis,citrate(TCA)cycle,anthocyanin biosynthesis,and aminoacyl-tRNA *** them,taurine and hypotaurine metabolism,flavor and flavor biosynthesis,indole alkaline biosynthesis,and alanine,aspartate and glutamate metabolism were the four main metabolic pathways affected by *** findings provide new insights into the physiological and metabolic response mechanisms of Tartary buckwheat to drought stress.

关键词： Tartary buckwheat drought untargeted metabolomics analysis metabolic pathway physiological response

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单目视觉测量系统不确定度的分析

机械工程学报 2008年第7期44卷 75-78页

作者：刘长英高印寒车仁生吉林大学仪器科学与电气工程学院长春130025 吉林大学测试科学与实验中心长春130025 哈尔滨工业大学电气工程与自动化学院哈尔滨150001

基于光学测头特征点成像的单目视觉坐标测量系统是一种新兴的高精度、大尺寸、三维整体、在线测试系统,在现代工业生产中具有重要应用价值。为评价这种单目视觉测量系统的测量精度,对基于测量不确定度的评定方法进行研究。在对影响单目... 详细信息

基于光学测头特征点成像的单目视觉坐标测量系统是一种新兴的高精度、大尺寸、三维整体、在线测试系统,在现代工业生产中具有重要应用价值。为评价这种单目视觉测量系统的测量精度,对基于测量不确定度的评定方法进行研究。在对影响单目视觉坐标测量系统测量精度的主要因素进行深入分析研究的基础上,建立测量不确定度评定表达式,实现对测量系统测量精度的评定;通过测量试验对评定方法加以验证,试验证明测量系统的测量精度与分析结果相吻合。

关键词：视觉测量测量不确定度光学测头扩展测量不确定度

Discussion on Construction and Mechanism of Practice Bases for Professional Degree Postgraduates Based on the Integration of Production and Education in Local Universities

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Agricultural Biotechnology 2023年第5期12卷 75-77,87页

作者： Dabing XIANG Yu FAN Xueling YE changying liu Liangzhen JIANG Yan WAN Yuehua WANG Yanxia SUN College of Food and Biological Engineering Chengdu UniversityChengdu 610106China

Under the background of emerging agricultural education,practice bases are an important place to train profession talented person that match social needs,so it is very important to build stable and long-term practice *** present,the main problems in the construction of practice bases for postgraduates in local colleges and universities are mainly focusing on construction and neglecting management,imperfect cooperation mechanism and lack of teaching management *** is of great significance to build a long-term management mechanism to ensure the education quality of practice ***,constructing the mode of"double integration and double promotion of production and education"with practice bases as the carrier and realizing the organic combination of industrial needs and postgraduate projects is an important idea for local colleges and universities to train professional degree postgraduates to"know agriculture,love agriculture,strengthen agriculture and promote agriculture",and it also provides a reference for the mechanism construction of postgraduate bases.

关键词： Emerging Agricultural Education Professional master Integration of science and education Practice base Mechanism