Exponential stability analysis for a class of neutral singular Markovian jump systems with time-varying delays

This paper deals with the exponential stability problem for a class of neutral singular systems with Markovian jump parameters. The considered systems involve time-varying delays not only in their state but also in their derivatives of state. By using the Lyapunov–Krasovskii functional method, some sufficient conditions are derived, which ensure that the considered systems are regular, impulse-free and exponentially stable. Finally, some numerical examples are employed to demonstrate the effectiveness of the obtained approaches.     

自我牺牲型领导对员工建言的影响:有调节的中介效应

基于社会认同理论视角,探讨了自我牺牲性领导对员工建言的影响及其内在机制。选择贵州省12家企业员工及其领导作为研究对象,采用层级回归等方法分析295份配对样本,结果表明：自我牺牲型领导对员工建言行为有正向促进作用,领导认同中介自我牺牲型领导与员工建言之间的关系,领导虚伪感知负向调节着自我牺牲型领导与领导认同之间的关系,同时也负向调节自我牺牲型领导经由领导认同影响员工建言的间接效应。     

一种磁耦合谐振线圈结构阻抗测量装置设计

提出了一种基于矢量伏安法测量原理的便携式阻抗测量装置,并分析了磁耦合谐振式无线电能传输中耦合线圈结构阻抗测量电路的设计原理,通过单片机系统控制AD5933阻抗转换器测量待测谐振耦合结构的阻抗,利用串口通讯协议实现LabVIEW软件和单片机系统的相互通讯。实验结果表明,耦合线圈工作在谐振态下,阻抗测量值与理论阻抗值相对误差为2%,成本较低,便于携带,能够满足大部分耦合线圈设计需求。     

Validating a High Performance Liquid Chromatography-Ion Chromatography (HPLC-IC) Method with Conductivity Detection After Chemical Suppression for Water Fluoride Estimation

Abstract A variety of methods, including the Ion Selective Electrode (ISE), have been used for estimation of fluoride levels in drinking water. But as these methods suffer many drawbacks, the newer method of IC has replaced many of these methods. The study aimed at (1) validating IC for estimation of fluoride levels in drinking water and (2) to assess drinking water fluoride levels of villages in and around Vellore district using IC. Forty nine paired drinking water samples were measured using ISE and IC method (Metrohm). Water samples from 165 randomly selected villages in and around Vellore district were collected for fluoride estimation over 1 year. Standardization of IC method showed good within run precision, linearity and coefficient of variance with correlation coefficient R² = 0.998. The limit of detection was 0.027 ppm and limit of quantification was 0.083 ppm. Among 165 villages, 46.1% of the villages recorded water fluoride levels >1.00 ppm from which 19.4% had levels ranging from 1 to 1.5 ppm, 10.9% had recorded levels 1.5–2 ppm and about 12.7% had levels of 2.0–3.0 ppm. Three percent of villages had more than 3.0 ppm fluoride in the water tested. Most (44.42%) of these villages belonged to Jolarpet taluk with moderate to high (0.86–3.56 ppm) water fluoride levels. Ion Chromatography method has been validated and is therefore a reliable method in assessment of fluoride levels in the drinking water. While the residents of Jolarpet taluk (Vellore distict) are found to be at a high risk of developing dental and skeletal fluorosis.     

对少数民族传统体育文化研究的文献综述——基于我国硕士论文的研究

以中国知网为检索源,通过查阅近10年来以少数民族传统体育文化为主题的硕士论文,运用文献资料法、数据统计法和逻辑分析法,从文献来源、文化现状、地区分布传承发展等几方面进行整理分类,发现了有关少数民族传统体育文化论文存在研究地区分布不均、研究的局限性等问题,最后提出了相关建议,望能成为今后学者们研究的参考和论据.     

ALEPH500流通模块的应用研究

通过对ILASII和ALEPH500这两个系统的流通模块进行比较分析,对ALEPH500流通模块在本馆应用所取得的效果进行概括,并针对目前运行中存在的问题进行分析和研究。     

在ALEPH500系统中实现西文规范数据库的更新

详细介绍国家图书馆西文规范数据库的更新过程,包括国家图书馆西文规范数据库的设置原则以及LC规范数据的合并规则、处理过程和灌入步骤.     

MODS的发展现状及其对图书馆网络化的影响

MARC在网络应用上存在先天不足,本文介绍了一种可以替代MARC的编目技术——MODS．重点介绍MODS的体系结构及特点,并对MODS在我国的应用提出了展望。     

基于TPI系统建构大学生优秀作品数据库

本文结合本梗大学生优秀作品数据库建设实例,着重阐述了应用清华同方TPI系统平台构建大学生优秀作品数据库的意义及技术手段,旨在使高校图书馆更好地为学科建设、教学、科研提供服务.     

基于产业融合的唐山市生产性服务业与制造业互动发展研究

随着生产性服务业的发展,制造业生产过程融入越来越多的服务要素,服务业与制造业出现了融合互动的态势。唐山市作为典型的工业基地,其制造业快速发展和升级,但缺乏现代生产性服务业为其提供战略支撑。因此,唐山市需大力推动生产性服务业与制造业的深层融合,依托深水港口和基础产业优势,以唐山湾"四点一带"和"四大主体功能区"为布局重点,推进现代物流、专业服务、会展服务等关键领域的发展,以增强制造业的国际竞争力。