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Nonlinear Transmission Property of the Excited State Proton Transfer Molecule 7-Hydroxyquinoline

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Chinese Physics Letters 2000年第11期17卷 809-811页

作者： xiaO Dong ZHANG Gui-Lan WANG hai-yan TANG Guo-Qing CHEN Wen-Ju Institute of Modern Optics Nankai UniversityTianjin 300071 Key Laboratory of Opto-electronics Information Technical ScienceEducation Ministry of China

Nonlinear transmission property of 7-hydroxyquinoline with excited state proton transfer effect was investigated at 355 and 532nm using picosecond laser *** experiment result shows that the transmissivity of 7-hydroxyquinoline is nonlinear at 355nm but it is linear at *** nonlinear transmissivity of 7-hydroxyquinoline originates from the larger nonlinearity of anion and cation formed in excited state proton transfer ***,7-hydroxyquinoline might be used as ultrafast optical amplitude limit material.

关键词： material. process. Nonlinear

Winter cover crops alter methanotrophs community structure in a double-rice paddy soil

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Journal of Integrative Agriculture 2016年第3期15卷 553-565页

作者： LIU Jing-na ZHU Bo YI Li-xia DAI Hong-cui XU He-shui ZHANG Kai HU Yue-gao ZENG Zhao-hai College of Agriculture and Biotechnology China Agricultural University School of Agronomy Yangtze University

Methanotrophs play a vital role in the mitigation of methane emission from soils. However, the influences of cover crops incorporation on paddy soil methanotrophic community structure have not been fully understood. In this study, the impacts of two winter cover crops（Chinese milk vetch（Astragalus sinicus L.） and ryegrass（Lolium multiflorum Lam.）, representing leguminous and non-leguminous cover crops, respectively） on community structure and abundance of methanotrophs were evaluated by using PCR-DGGE（polymerase chain reaction-denaturing gradient gel electrophoresis） and real-time PCR technology in a double-rice cropping system from South China. Four treatments were established in a completely randomized block design： 1） double-rice cropping without nitrogen fertilizer application, CK; 2） double-rice cropping with chemical nitrogen fertilizer application（200 kg ha^（–1） urea for entire double-rice season）, CF; 3） Chinese milk vetch cropping followed by double-rice cultivation with Chinese milk vetch incorporation, MV; 4） ryegrass cropping followed by double-rice cultivation with ryegrass incorporation, RG. Results showed that cultivating Chinese milk vetch and ryegrass in fallow season decreased soil bulk density and increased rice yield in different extents by comparison with CK. Additionally, methanotrophic bacterial abundance and community structure changed significantly with rice growth. Methanotrophic bacterial pmo A gene copies in four treatments were higher during late-rice season（3.18×10^7 to 10.28×10^7 copies g^–1 dry soil） by comparison with early-rice season（2.1×10^7 to 9.62×10^7 copies g^–1 dry soil）. Type Ⅰ methanotrophs absolutely predominated during early-rice season. However, the advantage of type Ⅰ methanotrophs kept narrowing during entire double-rice season and both types Ⅰ and Ⅱ methanotrophs dominated at later stage of late-rice.

关键词： Chinese milk vetch ryegrass methanotrophic bacteria community structure double-rice

Research of Adaptation of Infrastructures for WSRF in Grid Computing

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The Journal of China Universities of Posts and Telecommunications 2005年第4期12卷 1-5页

作者： yanG Qing WANG Ru-chuant WANG hai-yan Department of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing 210003 P.R. China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 P.R. China

One of the challenges that come from the development of Grid Computing applications is to predigest complicated process of compiling, deploying on the infrastructures and toolkits such as Globus Toolkit. As we explain in this article, we think it is essential to find the solution for rapid Grid Computing applications development. GBuilder is just such a tool we worked out for rapid develop on extant Grid Computing infrastructure platforms. By using GBuilder, applications should be able to react dynamically to different infrastructures and toolkits. Since WS-Resource Framework （WSRF） specifications provide technique standard to developers to declare and implement the association between Web service and one or more stateful resources, we aim at making infrastructures provide WS-Resource according these specifications automatically by adding a middleuaare. This paper focuses on the adapting mechanisms that are provided as the lowermost component of GBuilder. First we study the adapting model for Globus Toolkit in patterns of combination dynamic and static. Then it describes how to apply the dynam-static adaptation flexibly to adjust different infrastructures to provide WS-Resource based on WSRF. At last, it comes along the conclusion and we give out our future works.

关键词： grid computing adaptation WSRF globus toolkit

Multi-factor Analysis of Reflection from Granite Surfaces

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Journal of China University of Mining and Technology 2007年第2期17卷 255-257页

作者： ZHAO Nai-zhuo yan Lei ZHAO Yun-sheng LV Yun-feng WU Tai-xia College of Urban and Environmental Science Northeast Normal University Changchun Jilin 130024 China Beijing Key Lab of Spatial Information Integration and 3S Application Peking University Beijing 100871 China

Many earlier experiments have shown that reflection from rock surfaces depends upon surface roughness,in-cidence zenith angle,viewing zenith angle,incidence azimuth and viewing azimuth. However,no research exists show-ing the interaction effects of these variables. Using granite as a model surface,we have designed an orthogonal,two level test having seven factors. Analysis of variance shows that surface roughness,relative viewing azimuth,and the in-teraction between these two factors are the largest sources of variance in our experiment. Hence we should include the interaction term in reflection models of granite.

关键词： granite bidirectional reflectance mutual effect orthogonal test

Plasmon-enhanced photoresponse of deep-subwavelength GaAs NW photodetector

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Optoelectronics Letters 2021年第7期17卷 385-389页

作者： LI Bang TANG yanni yan Xin ZHANG xia LIU Yongg School of Computer&Information Engineering Anyang Normal UniversityAnyang 455000China Key Laboratory of Oracle Bone Inscriptions Information Processing Ministry of Education of ChinaAnyang 455000China Henan Key Laboratory of Oracle Bone Inscriptions Information Processing Anyang 455000China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

According to optical diffraction limit, the photoresponsity of nanowire(NW)-based photodetector exponentially decreases when its NW diameter reduces to the range of deep subwavelength. In this paper, we demonstrate a photoresponse-enhanced method of the deep-subwavelength Ga As NW photodetector by using a plasmon-driven dipole antenna. Considering that the enhancement is extremely influenced by the shape and size of antenna, the structure of antenna is optimized by finite difference time domain(FDTD) solutions. The optimal structure of antenna optimizes the responsivity-enhanced factors to 1123.3 and 224.7 in NW photodetectors with NW diameters of 20 nm and 60 nm, respectively. This photoresponse-enhanced method is promising for easy-integration high-performance nanoscale photodetectors.

关键词： antenna photoresponse photodetector

基于文献计量的全球生物降解地膜研究进展与热点分析

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土壤通报 2024年第1期55卷 254-264页

作者：巩文雯王甲辰董文涛周继华赵海康王学霞梁刚陆安祥北京市农林科学院质量标准与检测技术研究所北京100097 北京市农林科学院植物营养与资源环境研究所北京100097 北京市农业技术推广站北京100029

生物降解地膜是解决塑料地膜残留污染重要途径之一,在农业生产中得到越来越广泛的应用。文章采用文献计量分析与可视化工具,对Web of Science核心数据库中以biodegradable plastic mulch或biodegradable mulching films为主题的文献从... 详细信息

生物降解地膜是解决塑料地膜残留污染重要途径之一,在农业生产中得到越来越广泛的应用。文章采用文献计量分析与可视化工具,对Web of Science核心数据库中以biodegradable plastic mulch或biodegradable mulching films为主题的文献从发展路径、主要研究力量、研究热点及前沿等方面进行了剖析,以此探讨全球生物降解地膜领域的研究进展和发展态势。结果表明,生物降解地膜的研究发文数量不断增长,尤其2019年以来呈快速增长态势;中国的累计论文发表数量最多(177篇,占全球总发文量的34.44%),在国际合作网络中占据重要地位,但发文质量及影响力仍需通过创新及研究深度的拓展进行提高;关键词共线分析表明全球生物降解地膜研究热点主要为“生物高分子材料的制备、性质与降解行为”、“生物降解地膜在可持续农业中的应用”、“生物降解地膜对作物生长及产量的影响”以及“生物降解地膜对土壤质量和生态环境的影响”四个方面。从突现词分析可知,生物降解地膜产生的微塑料(microplastics)所引起的土壤污染及潜在环境风险是未来该研究领域的重要方向和热点内容。

关键词：生物降解地膜文献计量 Web of Science 农业生态环境

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装配式混凝土预制叠合板节点施工技术研究

建筑技术 2024年第8期55卷 962-965页

作者：胡宗华王海珍石岩石彪郑文宝北京建工土木工程有限公司北京100015

随着科技的进步,土建施工技术也在不断地创新,在保证环保节能的同时还要确保施工方便快捷、成本低,装配式混凝土预制构件叠合板施工工艺随之出现并被广泛推广。介绍了装配式混凝土预制构件叠合板节点施工质量控制。通过对预制构件叠合... 详细信息

随着科技的进步,土建施工技术也在不断地创新,在保证环保节能的同时还要确保施工方便快捷、成本低,装配式混凝土预制构件叠合板施工工艺随之出现并被广泛推广。介绍了装配式混凝土预制构件叠合板节点施工质量控制。通过对预制构件叠合板节点施工的阐述,总结了叠合板节点施工注意细节、质量控制技术方法。

关键词：装配式预制叠合板节点施工质量控制

基于血液动力学原理的中医脉搏波特征提取与识别

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中西医结合学报 2010年第8期8卷 742-746页

作者：郭睿王忆勤燕海霞李福凤颜建军许朝霞刘国萍上海中医药大学四诊信息化综合研究实验室上海201203 华东理工大学机械与动力工程学院上海200237

作者根据血液动力学原理,分析脉搏波形成的原因,认为中医不同脉象波形的形成与脉搏波的传播和反射特性有关,提出以表征脉搏波传播特性的波速和表征脉搏波反射特性的反射系数作为中医脉象的特征参数,利用支撑向量机对其进行分类识别。对... 详细信息

作者根据血液动力学原理,分析脉搏波形成的原因,认为中医不同脉象波形的形成与脉搏波的传播和反射特性有关,提出以表征脉搏波传播特性的波速和表征脉搏波反射特性的反射系数作为中医脉象的特征参数,利用支撑向量机对其进行分类识别。对正常人群常见脉象(平脉、弦脉和滑脉)的脉搏波波速和反射系数所作的分析,以及采用径向基核函数的支撑向量机对其所进行的分类,进一步证明血液动力学参数波速和反射系数作为具有生理病理意义的特征参数,能有效区分平、弦、滑脉。这为脉图的识别提供了一个新的思路。

关键词：血液动力学脉搏波波速反射系数支撑向量机

Hypolipidemic effect of SIPI-7623,a derivative of an extract from oriental wormwood,through farnesoid X receptor antagonism

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Chinese Journal of Natural Medicines 2018年第8期16卷 572-579页

作者： DENG Yi-Fang HUANG xiao-Ling SU Mei YU Peng-xia ZHANG Zhen LIU Quan-hai WANG Guo-Ping LIU Min-Yu Department of Pharmacology Shanghai Institute of Pharmaceutical Industry Jiangsu Carephar Pharmaceutical Co. Ltd.

Farnesoid X receptor(FXR) is a member of the nuclear receptor superfamily of ligand-activated transcription *** a metabolic regulator,FXR plays key roles in bile acid and cholesterol metabolism and lipid and glucose ***,FXR is a potential drug target for several metabolic syndromes,especially those related to lipidemia *** the present study,we identified small molecule SIPI-7623,a derivative of an extract from Oriental wormwood(Artemisia capillaris),and found that it specifically upregulated the expression of cholesterol-7-alpha-hydroxylase(CYP7 A1),downregulated the expression of sterol-regulatory element-binding protein 1 c(SREBP-1 c) in the liver,and inhibited the expression of ileal bile acid binding-protein(IBABP) in the ileum of *** found that inhibition of FXR by SIPI-7623 decreased the level of cholesterol and ***-7623 reduced the levels of cholesterol and triglyceride in in vitro Hep G2 cell models,ameliorated diet-induced atherosclerosis,and decreased the serum lipid content on rats and rabbits model of atherosclerosis in ***,SIPI-7623 decreased the extent of atherosclerotic *** resutls demonstrated that antagonism of the FXR pathway can be employed as a therapeutic strategy to treat metabolic diseases such as hyperlipidemia and *** conclusion,SIPI-7623 could be a promising lead compound for development of drugs to treat hyperlipidemia and atherosclerosis.

关键词： Farnesoid X receptor antagonist Hypolipidemic Bile acid enterohepatic circulation Cholesterol-7-alpha-hydroxylase Sterol-regulatory element-binding protein 1c