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A potential distribution map of wintering Swan Goose(Anser cygnoides)in the middle and lower Yangtze River floodplain,China

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Avian Research 2018年第4期9卷 344-353页

作者： An An Yong Zhang Lei Cao qiang jia Xin Wang State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China School of Life Sciences University of Science and Technology of ChinaHefei 230026China

Background: Reliable information on the distribution of target species and influencing environmental factors is essential for effective conservation management. However, ecologists have often derived data from costly field surveys. The Swan Goose(Anser cygnoides), a vulnerable Anatidae species, winters almost exclusively in China's Yangtze River floodplain, but wintering numbers have been steadily decreasing. To better safeguard this unique species, modern modeling approaches can be used to quantify and predict its suitable wintering habitat. Specifically, a potential wintering distribution map of this species is critically ***: This study used the maximum entropy approach to model a distribution map of this species. In total, data from 97 up-to-date sites were extracted from 1263 survey sites(excluding duplicate data). After eliminating spatial autocorrelation, 11 environmental variables, including factors related to climate, land structure, vegetation, and anthropogenic activities, were used for model ***: The prediction distribution map shows that the population has concentrated mainly in the boundary area of Anhui, Hubei, and jiangxi provinces, especially along the Yangtze River. Modeling results suggest that areas within the middle and lower Yangtze River floodplain, such as those in Hunan and Hubei provinces and the eastern coastal area of Zhejiang Province, demonstrate a potential level of "medium" suitability for this species to ***: Results from this study provide fundamental information for the restoration and management of the Swan Goose. Our "visualized" potential distribution map can assist in planning optimal conservation strategies, and consequently may help to increase the number of wintering populations in China.

关键词： Swan Goose Species distribution map Maxent Ecological conservation management

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Accurate two-degree-of-freedom discrete-time current controller design for PMSM using complex vectors

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Frontiers of Information Technology & Electronic Engineering 2018年第4期19卷 569-581页

作者： Meng WANG jia-qiang YANG Xiang ZHANG Chang-sheng ZHU College of Electrical Engineering Zhejiang University

Properties of the current controller are essential for permanent magnet synchronous machine(PMSM)drives,but the conventional continuous-time current controller cannot fully decouple the cross-coupling terms when applied in the digital *** performance is related closely to the rotational *** improve the performance of the current loop,the direct design method in the discrete-time domain is adopted using the accurate discrete-time complex vector *** integrated accurate hold-equivalent discrete model for PMSM is derived considering the difference between the output of the voltage source inverter and the back electro-motive *** an accurate two-degree-of-freedom(2DOF)current controller with a third-order closed-loop transfer function is *** 2DOF controller has more freedom in pole placement,and two schemes with a different cancelled pole-zero pair are *** is conducted by the robust root locus method via the complex vector root locus and sensitivity functions,showing properties in disturbance rejection and sensitivity to parameter variation of two *** schemes have their own ***,the dynamic performance and flexibility of the proposed current controller is verified on a 2.5-kW PMSM test bench.

关键词： Permanent magnet synchronous machine(PMSM) Discrete-time current controller Complex vector

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BRANCHING GENERATION DURING THE FREE RADICAL COPOLYMERIZATION OF p-VINYL BENZENE SULFONYL CHLORIDE WITH STYRENE

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Chinese Journal of Polymer Science 2013年第10期31卷 1404-1414页

作者： Cui-ping Li Rong Huang jia-qiang Wang Zan Liu Department of Applied Chemistry Key Laboratory of Medicinal Chemistry for Natural Resource College of Chemistry Science and Engineering Yunnan University Kunming Cable Co. Ltd

The branching generation during the free radical copolymerization of chain transfer monomer p-vinyl benzene sulfonyl chloride （VBSC） with styrene was investigated by a simple mathematic model. Chain transfer constant of VBSC was determined to be around 0.3 by fitting the 1H-NMR monitored experimental results with a mathematic model. According to the theoretical analysis, the obtained poIy（VBSC） and its copolymers were substantiated to have a grafting-like main chain with residual pendent sulfonyl chloride groups after consuming most of the vinyl groups. The copolymerization results of VBSC with styrene at varied feed ratios demonstrated that conversion of sulfonyl chloride groups was lower than that of the monomer, which was in agreement with the theoretical results. The glass transition temperature, number average molecular weight and distribution of those obtained polymers were primarily investigated. Comparing with other chain transfer monomers, VBSC has a chain transfer constant much closer to unity therefore a more branched polymer is expected. Additionally, the branched polystyrene with residual sulfonyl chloride groups is hopefully to be further used as ATRP macro- initiators or reactive intermediates to synthesize functional polymers with complex structure.

关键词： Branched polystyrene Chain transfer constant Chain transfer monomer p-Vinyl benzene sulfonyl chloride Radical polymerization.

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Neonatal Propofol and Etomidate Exposure Enhance Inhibitory Synaptic Transmission in Hippocampal Cornus Ammonis 1 Pyramidal Neurons

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Chinese Medical Journal 2016年第22期129卷 2714-2724页

作者： jia-qiang Zhang Wan-Ying Xu Chang-Qing Xu Department of Anesthesiology University of Florida College of Medicine Gainesville FL 32611 USA Department of Anesthesiology The People's Hospital of Zhengzhou University Zhengzhou Henan 450003 China Department of Neurobiology Wake Forest University Winston-Salem NC 27106 USA

Background：Propofol and etomidate are the most important intravenous general anesthetics in the current clinical use and that mediate gamma-aminobutyric acid＇s （GABAergic） synaptic ***,their long-term effects on GABAergic synaptic transmission induced by neonatal propofol or etomidate exposure remain *** investigated the long-term GABAergic neurotransmission alterations,following neonatal propofol and etomidate ***：Sprague-Dawley rat pups at postnatal days 4 6 were underwent 6-h-long propofol-induced or 5-h-long etomidate-induced *** performed whole-cell patch-clamp recording from pyramidal cells in the cornus ammonis 1 area of acute hippocampal slices of postnatal 80-90 *** and miniature inhibitory GABAergic currents （spontaneous inhibitory postsynaptic currents [sIPSCs] and miniature inhibitory postsynaptic currents [mIPSCs]） and their kinetic characters were *** glutamatergic tonic effect on inhibitory transmission and the effect of bumetanide on neonatal propofol exposure were also ***：Neonatal propofol exposure significantly increased the frequency of mIPSCs （from 1.87 ± 0.35 Hz to 3.43 ± 0.51 Hz,P 〈 0.05） and did not affect the amplitude of mIPSCs and *** propofol and etomidate slowed the decay time of mIPSCs kinetics （168.39 ± 27.91 ms and 267.02 ± 100.08 ms vs.68.18 ± 12.43 ms;P 〈 0.05）.Bumetanide significantly blocked the frequency increase and reversed the kinetic alteration of mIPSCs induced by neonatal propofol exposure （3.01 ± 0.45 Hz and 94.30 ± 32.56 ms）.Conclusions：Neonatal propofol and etomidate exposure has long-term effects on inhibitory GABAergic *** might act at pre-and post-synaptic GABA receptor A （GABAA） receptors within GABAergic synapses and impairs the glutamatergic tonic input to GABAergic synapses;etomidate might act at the postsynaptic site.

关键词： Etomidate Gamma-aminobutyric Acid Glutamate Propofol Synapse Transmission

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作物氮素遥感估算的研究综述

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价值工程 2024年第3期43卷 162-165页

作者：高菊王家强塔里木大学农学院阿拉尔843300

氮素是组成作物的核心元素,并且与作物光合作用密切相关,监测作物氮素含量对于作物高产具有重要意义。目前作物氮素的估算已经从最初的人工目视解译、生理生化分析监测发展到以遥感技术为核心光谱估算。本文对作物氮素遥感估算的进展进... 详细信息

氮素是组成作物的核心元素,并且与作物光合作用密切相关,监测作物氮素含量对于作物高产具有重要意义。目前作物氮素的估算已经从最初的人工目视解译、生理生化分析监测发展到以遥感技术为核心光谱估算。本文对作物氮素遥感估算的进展进行综述,回顾了作物氮素估算的发展历程,列举了常见的几种建模方法,总结了基于叶片尺度和冠层尺度的作物氮素含量估算研究进展,分析了影响作物氮素含量估算的两大因素:作物氮素的垂直分布、光谱数据采集的角度差异。最终从多角度立体观测、多源数据的协同应用、估算模型的普适性、估算模型的田间应用四个方面进行了总结与展望。

关键词：作物氮素含量遥感技术估算模型研究进展

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Homochirality in Ferroelectrochemistry

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Chinese Journal of Chemistry 2024年第10期42卷 1133-1144页

作者： Hang Peng Jun-Chao Qi Yu-Si Liu jia-Mei Zhang Wei-qiang Liao Ren-Gen Xiong Ordered Matter Science Research Center Nanchang UniversityNanchangJiangxi 330031China

What is the most favorite and original chemistry developed in your research group?We originally proposed the design principle for molecular ferroelectrics:ferroelectrochemistry,including quasi-spherical theory,the introduction of homochirality,and H/F *** changed the blind search for molecular ferroelectrics into targeted chemical design,which will develop into a new discipline.

关键词： Molecular ferroelectrics Homochirality Ferroelectricity Chemical design Point groups

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miR-200b-3p accelerates progression of pituitary adenomas by negatively regulating expression of RECK

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Oncology Research 2024年第5期32卷 933-941页

作者： XIAOXI WANG YANFEI jia qiang LI qiang YANG YINGFENG LIU BEIFENG WEI XIANG NIU YINJIE ZHANG XIAODONG LUO ZIYU ZHAO PENG WANG Department of Neurosurgery Tianshui First People’s HospitalTianshuiChina Department of Neurosurgery The Second Affiliated Hospital of Lanzhou UniversityLanzhouChina

MicroRNA(miR)-200b-3p has been associated with many tumors,but its involvement in pituitary adenoma is *** study investigated the molecular mechanism underlying miR-200b-3p regulation in pituitary adenomas to provide a theoretical basis for *** was used to analyze pituitary adenoma-related genes and screen new targets related to RECK and *** well,the relationship between miR-200b-3p and RECK protein was verified using a double-luciferase reporter gene *** expression of miR-200b-3p in clinical samples was analyzed by in situ *** of the miR-200b-3p inhibitor and small interfering-RECK(si-RECK)was verified by ***3 cell viability and proliferation were detected using CCK8 and EdU *** was detected by flow cytometry and western *** healing and Transwell assays were used to detect cell migration and *** effects of miR-200b-3p and RECK on GH3 cells were verified using salvage ***-200b-3p was highly expressed in pituitary tumor *** of miR-200b-3p inhibited cell proliferation promoted cell apoptosis,inhibited invasion and migration,and inhibited the expression of matrix ***,miR-200b-3p negatively regulated *** expression of RECK in pituitary adenoma tissues was lower than that in neighboring ***-RECK rescued the function of miR-200b-3p inhibitors in the above cellular behaviors,and miR-200b-3p accelerated the development of pituitary adenoma by negatively regulating RECK *** summary,this study investigated the molecular mechanism by which miR-200b-3p regulates the progression of pituitary adenoma through the negative regulation of *** findings provide a new target for the treatment of pituitary adenoma.

关键词： Pituitary adenomas miR-200b-3p RECK Matrix metalloproteinase

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Systemin/Jasmonate-Mediated Systemic Defense Signaling in Tomato

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Molecular Plant 2011年第4期4卷 607-615页

作者： jia-qiang Sun Hong-Ling jiang Chuan-You Li State Key Laboratory of Plant Genomics National Centre for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy ofSciences Datun Road Beijing 100101 China

Wound-inducible proteinase inhibitors （PIs） in tomato plants provide a useful model system to elucidate the signal transduction pathways that regulate systemic defense response. Among the proposed intercellular signals for wound-induced PIs expression are the peptide systemin and the oxylipin-derived phytohormone jasmonic acid （JA）. An increasing body of evidence indicates that systemin and JA work in the same signaling pathway to activate the ex- pression of PIs and other defense-related genes. However, relatively less is known about how these signals interact to promote cell-to-cell communication over long distances. Genetic analysis of the systemin/JA signaling pathway in tomato plants provides a unique opportunity to study, in a single experimental system, the mechanism by which peptide and oxylipin signals interact to coordinate systemic expression of defense-related genes. Previously, it has been proposed that systemin is the long-distance mobile signal for defense gene expression. Recently, grafting experiments with tomato mutants defective in JA biosynthesis and signaling provide new evidence that JA, rather than systemin, functions as the systemic wound signal, and that the biosynthesis of JA is regulated by the peptide systemin. Further understanding of the systemin/JA signaling pathway promises to provide new insights into the basic mechanisms governing plant defense to biotic stress.

关键词： Systemic defense response systemin jasmonic acid tomato Arabidopsis.

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Exponential response electrical pole-changing method for a five-phase induction machine with a current sliding mode control strategy

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Frontiers of Information Technology & Electronic Engineering 2017年第8期18卷 1151-1166页

作者： jia-qiang YANG Rong-sen YIN Xiao-jun ZHANG Jin HUANG College of Electrical Engineering Zhejiang University Hangzhou 310027 China

现有电子变极技术可以拓宽多相感应电机系统的恒功率调速范围,但是会带来转矩脉动和转速波动。为减小电机在变极过程中的转矩脉动和转速波动,本文研究了基于电流滑模控制策略的五相感应电机指数响应电子变极技术。本技术采用双平面(

关键词：五相感应电机电子变极滑模控制指数响应转矩脉动减小

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Evaluation of genetic response of mesenchymal stem cells to nanosecond pulsed electric fields by whole transcriptome sequencing

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World Journal of Stem Cells 2024年第3期16卷 305-323页

作者： jian-Jing Lin Tong Ning Shi-Cheng jia Ke-jia Li Yong-Can Huang qiang Liu jian-Hao Lin Xin-Tao Zhang Department of Sports Medicine and Rehabilitation Peking University Shenzhen HospitalShenzhen 518036Guangdong ProvinceChina Institute of Medical Science The Second HospitalCheeloo College of MedicineShandong UniversityJinan 250033Shandong ProvinceChina Department of Biomedical Engineering Institute of Future TechnologyPeking UniversityBeijing 100871China Shenzhen Engineering Laboratory of Orthopaedic Regenerative Technologies Peking University Shenzhen HospitalShenzhen 518036Guangdong ProvinceChina Arthritis Clinical and Research Center Peking University People’s HospitalBeijing 100044China

BACKGROUND Mesenchymal stem cells(MSCs)modulated by various exogenous signals have been applied extensively in regenerative medicine ***,nanosecond pulsed electric fields(nsPEFs),characterized by short duration and high strength,significantly influence cell phenotypes and regulate MSCs differentiation via multiple ***,we used transcriptomics to study changes in messenger RNA(mRNA),long noncoding RNA(lncRNA),microRNA(miRNA),and circular RNA expression during nsPEFs *** To explore gene expression profiles and potential transcriptional regulatory mechanisms in MSCs pretreated with *** The impact of nsPEFs on the MSCs transcriptome was investigated through whole transcriptome *** were pretreated with 5-pulse nsPEFs(100 ns at 10 kV/cm,1 Hz),followed by total RNA *** transcript was normalized by fragments per kilobase per *** change and difference significance were applied to screen the differentially expressed genes(DEGs).Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses were performed to elucidate gene functions,complemented by quantitative polymerase chain reaction *** In total,263 DEGs were discovered,with 92 upregulated and 171 *** were predominantly enriched in epithelial cell proliferation,osteoblast differentiation,mesenchymal cell differentiation,nuclear division,and wound *** cellular components,DEGs are primarily involved in condensed chromosome,chromosomal region,actin cytoskeleton,and *** aspect of molecular functions,DEGs are mainly involved in glycosaminoglycan binding,integrin binding,nuclear steroid receptor activity,cytoskeletal motor activity,and steroid *** real-time polymerase chain reaction confirmed targeted transcript *** Our systematic investigation of the wide-ranging transcriptional pattern modulated by nsPEFs revealed the differential expression of 26

关键词： Nanosecond pulsed electric fields Whole transcriptome sequencing Mesenchymal stem cells Genetic response Stem cell engineering

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