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土壤通报 2004年第1期35卷 78-83页

作者：王为木杨肖娥浙江大学环境与资源学院

养分缺乏是酸性土壤的主要障碍因子之一 ,筛选和培育营养高效的作物品种是维持和提高酸性土壤生产力的重要措施。本文综述了酸性土壤上作物氮、磷、钾营养高效基因型的形态学、生理学及遗传学特征。

关键词：酸性土壤作物营养水平形态特征生理遗传学特征特性

Mobile Robot Path Planning Based on Improved Ant Colony Optimization Algorithm

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Mobile Robot Path Planning Based on Improved Ant Colony Opti...

基于有限元和理论力学的支架顶梁开裂机理研究

第三十届中国控制会议

作者： ZHAO Juanping~(1,2.,gao Xianwen~1,FU Xiuhui~(2.3) 1.college of Information {2. and Engineering,Northeastern University,Shenyang 110004,P.R.china 2.Academy of Information engineering,Shenyang University of Chemical Technology,Shenyang 110142.P.R.china 3.Shenyang Institute of Automation Chinese Academy of {2.s,Shenyang 110015,P.R.china

＜正＞Ant two-way parallel searching strategy presented in[1]is adopted to utilize cooperation ability between ants and to accelerate searching speed,but it is clearly seen that this tactic loses some feasible paths and even loses optimal path,so a new ants encountering judgment method is *** in order to avoid running into local optima a new path selecting strategy and a new global pheromone updating tactic are *** researches indicate improved algorithm has good efficiency and as long as the path objectively exists the algorithm can plan a safe optimal path quickly.

关键词： Ant Colony Optimization Path Planning Mobile Robot Path Selecting Strategy Global Pheromone Updating

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煤矿机械 2024年第10期45卷 80-82页

作者：王勇杨洋高有进永城煤电控股集团有限公司机电设备管理中心河南商丘476600 河南工程学院资源与安全工程学院郑州451191

针对ZY10500-11-2.D支架在实际工程应用中顶梁部分出现的问题,对该支架进行理论力学计算。损坏位置为加强板与主肋交界处。通过力学计算与数值模拟得出,顶梁在该处的损坏与受弯无关,为受扭导致。通过把相邻主肋增高15 mm,将支架的使用... 详细信息

针对ZY10500-11-2.D支架在实际工程应用中顶梁部分出现的问题,对该支架进行理论力学计算。损坏位置为加强板与主肋交界处。通过力学计算与数值模拟得出,顶梁在该处的损坏与受弯无关,为受扭导致。通过把相邻主肋增高15 mm,将支架的使用寿命从15 000次提升至30 000次,为支架在极端情况下受损机理分析及结构优化提供理论支撑。

关键词：液压支架采煤工作面安全开采力学计算数值模拟

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植物长链非编码RNA进展分析

分子植物育种 2018年第3期16卷 791-797页

作者：高成香邓粉妮沈法富潍坊护理职业学院青州262500 山东农业大学农学院泰安271018

长链非编码RNA(lncRNA)是分子长度大于2.0 bp,缺少编码蛋白质功能的RNA,根据lncRNA在基因组来源与邻近蛋白编码基因相对位置,可以分为5类:(1)正义长链非编码RNA;(2.来源内含子的反义转录RNA;(3)基因间的非编码RNA;(4)基因内的非编码RNA;... 详细信息

长链非编码RNA(lncRNA)是分子长度大于2.0 bp,缺少编码蛋白质功能的RNA,根据lncRNA在基因组来源与邻近蛋白编码基因相对位置,可以分为5类:(1)正义长链非编码RNA;(2.来源内含子的反义转录RNA;(3)基因间的非编码RNA;(4)基因内的非编码RNA;(5)双向非编码RNA。lncRNA通过多种机制行使功能,包括激活、聚集或转运蛋白产生表观遗传沉默和抑制,核小体定位修饰启动子活性和调控DNA和组蛋白进行甲基化产生表观遗传学修饰。与m RNA相比较,lncRNA具有植物组织表达的特异性,植物lncRNA参与不同生物学代谢途径、具有多种生物学功能。

关键词：植物长链非编码RNA 结构与功能分子机制

机构投资者网络团体如何影响企业ESG表现?

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研究与发展管理 2024年第1期36卷 14-26页

作者：王凯丁宁高皓王臣博首都经济贸易大学中国ESG研究院北京100070 首都经济贸易大学工商管理学院北京100070 清华大学五道口金融学院北京100083 首都经济贸易大学经济学院北京100070

近年来,证券市场中的机构投资者扮演着越来越重要的角色,它们可能通过共同持股关系形成网络团体,采取一致行动。基于中国2.10—2.2.年A股上市公司数据,构建了机构投资者网络团体,结合社会网络理论与代理理论,探究网络团体持股对企业ESG... 详细信息

近年来,证券市场中的机构投资者扮演着越来越重要的角色,它们可能通过共同持股关系形成网络团体,采取一致行动。基于中国2.10—2.2.年A股上市公司数据,构建了机构投资者网络团体,结合社会网络理论与代理理论,探究网络团体持股对企业ESG表现的影响。研究结果表明:网络团体持股可以有效提升企业ESG表现;网络团体持股能够缓解2.代理问题,通过提升信息透明度以及抑制大股东私利促进了企业ESG表现;在缓解了内生性问题,并进行了稳健性检验后,网络团体持股提升企业ESG表现的结论仍成立。进一步研究的结果表明,网络团体的特征会影响企业的ESG表现,即团体数量更多、规模越大、背景越丰富,持股越稳定,相对力量越强,企业ESG表现越好。研究结论既丰富了机构投资者网络团体的后果研究和企业ESG表现影响因素的研究,也为上市公司、机构投资者和政府提供了一定的实践启示。

关键词：机构投资者机构投资者网络团体 ESG表现信息透明度大股东私利

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小型中医经络检测仪的研制

生物医学工程研究 2004年第3期23卷 170-173页

作者：李娜王洪君山东大学信息科学与工程学院山东济南250100

在传统中医经络理论的基础上 ,结合先进的电子技术设备 ,设计了一种小型中医经络检测仪。此检测仪通过采集人体穴位经电流测试 (给一定电流刺激 )所反射出来的信息 ,经微控制器处理后 ,能够精确显示或打印出人体的健康状况。检测仪具有... 详细信息

在传统中医经络理论的基础上 ,结合先进的电子技术设备 ,设计了一种小型中医经络检测仪。此检测仪通过采集人体穴位经电流测试 (给一定电流刺激 )所反射出来的信息 ,经微控制器处理后 ,能够精确显示或打印出人体的健康状况。检测仪具有方便、快捷等优势 ,易推广普及。

关键词：小型中医经络检测仪研制中医经络理论微控制器单片机

Substitutions of stem-loop subdomains in internal ribosome entry site of Senecavirus A:Impacts on rescue of sequence-modifying viruses

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Journal of Integrative Agriculture 2024年第7期23卷 2391-2406页

作者： Qianqian wang Jie wang Lei Zhang Xiaoxiao Duan Lijie Zhu Youming Zhang Yan Li Fuxiao Liu college of Veterinary Medicine Qingdao Agricultural UniversityQingdao 266109China college of Veterinary Medicine Inner Mongolia Agricultural UniversityHuhhot 010018China Shandong New Hope Liuhe Group Co. Ltd.Qingdao 266100China Qingdao Center for Animal Disease Control&Prevention Qingdao 266199China State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266237China

Senecavirus A(SVA)has a positive-sense,single-stranded RNA *** 5´untranslated region harbors an internal ribosome entry site(IRES),comprising 10 larger or smaller stem-loop structures(including a pseudoknot)that have been demonstrated to be well ***,it is still unclear whether each stem-loop subdomain,such as a single stem or loop,is also highly *** clarify this issue in the present study,a set of 2. SVA cDNA clones were constructed by site-directed mutagenesis(SDM)on the *** SDM-modified scenarios included:(1)stem-formed complementary sequences exchanging with each other;(2.loop transversion;(3)loop transition;and(4)point *** cDNA clones were separately transfected into cells for rescuing viable viruses,whereas only four SVAs of interest could be recovered,and were genetically stable during 2. *** progeny grew significantly slower than the other three *** dual-luciferase reporter assay showed that none of the SDM-modified IRESes significantly inhibited the IRES *** previous study indicated that a single motif from any of the ten stem structures,if completely mutated,would cause the failure of virus ***,our present study revealed three stem structures,whose individual complementary sequences could exchange with each other to rescue sequence-modifying ***,one apical loop was demonstrated to have the ability to tolerate its own full-length transition,also having no impact on the recovery of sequence-modifying *** present study suggested that not every stem-loop structure was strictly conserved in its conformation,while the full-length IRES itself was well *** provides a new research direction on interaction between the IRES and many factors.

关键词： SVA HCV IRES HCV-like IRES stem-loop structure cDNA clone virus rescue mutation

蛋白磷酸酯酶2.调节微管相关蛋白1b的磷酸化

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生物化学与生物物理进展 2004年第11期31卷 986-990页

作者：王丽岳刁路明田青王建枝龚成新湖北省武汉市第三人民医院武汉大学医学院病理教研室华中科技大学同济医学院病理生理系 Department of Neurochemistry New York State Institute for Basic research Staten Island New York 10314 USA

微管相关蛋白MAP1b的生物学活性受其磷酸化修饰的调节 ,后者则受相应的蛋白激酶和蛋白磷酸酯酶(PP)调控 .为研究蛋白磷酸酯酶在脑内对MAP1b磷酸化的调控作用 ,采用有代谢活性的大鼠脑片作为模型 ,分别应用冈田酸 (okadaicacid)和cyclosp... 详细信息

微管相关蛋白MAP1b的生物学活性受其磷酸化修饰的调节 ,后者则受相应的蛋白激酶和蛋白磷酸酯酶(PP)调控 .为研究蛋白磷酸酯酶在脑内对MAP1b磷酸化的调控作用 ,采用有代谢活性的大鼠脑片作为模型 ,分别应用冈田酸 (okadaicacid)和cyclosporinA选择性地抑制PP2.和PP2.活性 ,来研究其对脑内蛋白磷酸酯酶MAP1b磷酸化的调控 .采用特异性的MAP1bⅠ型磷酸化依赖性抗体 5 2.2.免疫印迹技术检测MAP1bⅠ型磷酸化 .结果表明 ,当PP2.被okadaicacid选择性抑制后 ,MAP1bⅠ型磷酸化明显增加 .而PP2.被选择性地抑制后 ,MAP1b磷酸化的变化不大 .免疫组化染色显示 ,MAP1b广泛分布于鼠大脑神经元和突起中 ,与对照组相比 ,在PP2.抑制的脑片中抗体 5 2.2.免疫活性在神经元中明显升高 .上述结果表明 ,PP2.是脑中调控MAP1bⅠ型磷酸化的主要蛋白磷酸酯酶 .

关键词：蛋白磷酸酯酶2. 微管相关蛋白1b 蛋白磷酸化大鼠脑片冈田酸

Limitations on Minimum Tracking Energy for SISO Plants

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Limitations on Minimum Tracking Energy for SISO Plants

Epidemiology and genetic characterization of tet(X4)-positive Klebsiella pneumoniae and Klebsiella quasipneumoniae isolated from raw meat in Chengdu City, china

2.09中国控制与决策会议

作者： Hou-Neng wang~1,Li Ding~1,Zhi-Hong Guan~1,Jie Chen~(1,2. 1.Department of Control science and Engineering, Huazhong University of science and Technology,Wuhan,430074,P.R.china 2.college of Engineering,University of California,Riverside,CA 92.2. USA

＜正＞This paper discusses the fundamental limitations imposed by the intrinsic characteristic of *** plant is stable of *** performance is about minimum tracking energy for tacking error asymptotically approaching *** a time-domain integral of the square of the input as a performance index,we derive relations that represent fundamental limits on the achievable performance for single-input single-output *** relations depend on the unstable poles and right half plane zeros of the plant under study,and the stable and minimum part of part is also related. When the plant is unstable,the two-free-of-controller is addressed,*** limitations are significant references for the controller designs.A numerical example shows the design limitation.

关键词： Limitation Tracking energy Unstable poles Nonminimum phase zero Performance

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Biosafety and Health 2024年第2期6卷 116-124页

作者： Weishuai Zhai Yiqing wang Honghu Sun Bo Fu Qidi Zhang Congming Wu Jianzhong Shen Dejun Liu yang wang National Key Laboratory of Veterinary Public Health and Safety College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China Technology Innovation Center for Food Safety Surveillance and Detection Sanya InstituteChina agricultural University Sanya 572025China Irradiation Preservation Key Laboratory of Sichuan ProvinceChengdu Institute of Food InspectionChengdu 611135China Collge of Veterlnary Medicine Qingdao Agricultural UniversityQingdao 266109China

The rapid spread of mobile tigecycline resistance presents a significant public health threat,particularly with the increasing prevalence of tet(X4)-positive Enterobacterales across various *** study aimed to inves-tigate the epidemic features and transmission dynamics of tet(X4)-positive Klebsiella pneumoniae(***-niae)through the analysis of 2.6 raw meats,including pork(n=182.,beef(n=16),duck(n=5),and chicken(n=3).These samples were collected from schools,markets,and restaurants in Chengdu City,china.A total of 2. isolates were obtained from 13 administrative *** isolates exhibited resistance to tetracycline,tigecycline,ampicillin,chloramphenicol,and *** half of the isolates also demon-strated resistance to streptomycin(80%),sulfamethoxazole/trimethoprim(72.),ciprofloxacin(64%),and ampicillin/sulbactam(56%).Among these strains,14 distinct sequence types(STs)were identified,revealing evidence of inter-regional clonal spread,notably among 9 *** *** analysis revealed the presence of two *** ST5 closely resembling hypervirulent *** from ***,12.isolates were capable of transferring tigecycline resistance to Escherichia coli *** plasmid analysis showed that the tet(X4)-harboring plasmids in *** could be classified into four types,primarily belonging to the IncFIA(HI1)/HI1A/HI1B hybrid plasmid(n=16)and IncFII plasmid(n=7),which significantly contributed to the cross-species dissemination of tet(X4).In summary,this study highlights the prevalence of MDR tet(X4)-positive *** in Chengdu,driven predominantly by clonal expansion and plasmid-mediated horizontal gene *** findings emphasize the importance of contin-uous surveillance of tet(X4)-positive *** in raw meat and the implementation of effective measures to control their spread.

关键词： tet(X4) Tigecycline K.pneumoniae Clonal spread Horizontal transfer