基于共词分析的国外图书馆学情报学领域研究现状探析     

郭璇 《情报杂志》2011,30(11)

以Emerald期刊全文数据库为数据源,采用聚类共词分析法确定出,国外图书馆学情报学领域2005-2010年的6个研究主题(数字图书馆、馆际互借与文献传递、信息检索技术、电子资源、知识管理和信息服务)和这些主题中的12个研究热点。当前,这些研究呈现跨学科研究、应用研究为主、定量研究占一定比例和以用户为导向等特点。国外图情领域今后大致的发展是,以信息的管理、检索和服务等研究为依托,数字图书馆研究将有实质性进展。  相似文献   

基于多媒体自助服务终端系统安全的研究     

杨萱 《科技广场》2011,(1):79-82

本文论述和分析了多媒体自助服务终端系统安全方面的现状,以及面临的一系列安全问题,并从管理制度、数据安全、远程风险方面介绍了一些相关的管理与安全技术,用于控制自助服务终端系统中存在的安全隐患。  相似文献   

基于Verilog HDL的逻辑分析仪电路设计     

霍秋珍  轩克辉 《科技广场》2011,(3)

本文设计的是一个基于Verilog HDL的简易逻辑分析仪电路,在满足触发条件时,对被测信号进行采集、存储、并在示波器上显示所采集到的信号波形和时间标志线。在该逻辑分析仪电路中,所有信号都与时间相关,从而可以观察到时间的设置与保持、脉冲宽度、外部丢失的数据关系、也能够帮助我们实施数字硬件故障检测。  相似文献   

基于钻石模型对湖南农业产业集群竞争力研究     

许烜  周磊 《科技与管理》2011,13(6):17-20

农业产业集群是现代农业发展的重要方向,基于钻石模型分析湖南农业产业集群的现状,分别从生产要素、需求条件、相关与支持产业、企业战略、企业结构、同业竞争等方面对湖南农业产业集群竞争力进行分析,在结合自身区域的特点下,提出提升湖南农业产业集群竞争力的策略,从而构建湖南特色农业产业集群。  相似文献   

浅谈中等职业学校如何加强素质教育     

宣蕊青 《科教文汇》2011,(5):47-48

文章阐述了素质教育的内涵,分析了现今中职学校在办学模式、办学观念、师资队伍和生源等方面存在的问题。提出了中职学校应通过搞活办学模式、调整专业设置、改进课程结构、全面实施学分制等弹性学习制度,强化素质教育队伍,培养适应全面推进素质教育的新型教师;加强学校、家庭和社会三者的有机结合,形成学校、家庭和社会三位一体的素质教育体系;改进学科教学,把素质教育渗透于学科教学活动之中;把素质教育融进日常行为规范管理和学生＂三自＂工作中,建立于开放型的社会活动、课外活动上等途径和对策来加强素质教育。  相似文献   

Shrink-film microfluidic education modules: Complete devices within minutes     

Nguyen D  McLane J  Lew V  Pegan J  Khine M 《Biomicrofluidics》2011,5(2):22209

As advances in microfluidics continue to make contributions to diagnostics and life sciences, broader awareness of this expanding field becomes necessary. By leveraging low-cost microfabrication techniques that require no capital equipment or infrastructure, simple, accessible, and effective educational modules can be made available for a broad range of educational needs from middle school demonstrations to college laboratory classes. These modules demonstrate key microfluidic concepts such as diffusion and separation as well as "laboratory on-chip" applications including chemical reactions and biological assays. These modules are intended to provide an interdisciplinary hands-on experience, including chip design, fabrication of functional devices, and experiments at the microscale. Consequently, students will be able to conceptualize physics at small scales, gain experience in computer-aided design and microfabrication, and perform experiments-all in the context of addressing real-world challenges by making their own lab-on-chip devices.  相似文献   

Label-free microfluidic characterization of temperature-dependent biomolecular interactions     

Nguyen T  Pei R  Landry DW  Stojanovic MN  Lin Q 《Biomicrofluidics》2011,5(3):34118-341187

We present a microfluidic approach to characterizing temperature-dependent biomolecular interactions. Solvated L-arginine vasopressin (AVP) and its immobilized RNA aptamer (spiegelmer) were allowed to achieve equilibrium binding in a microchip at a series of selected temperatures. Unbound AVP were collected and analyzed with matrix-assisted laser desorption∕ionization mass spectrometry (MALDI-MS), yielding melting curves that reveal highly temperature-dependent zones in which affinity binding (36–45 °C) or dissociation (25–33 °C and 50–65 °C) occurs. Additionally, temperature-dependent binding isotherms were constructed; from these, thermodynamic quantities involved in binding were extracted. The results illustrated a strong change in heat capacity of interaction for this system, suggesting a considerable thermodynamic influence controlling vasopressin-spiegelmer interaction.  相似文献   

Microfluidic droplet encapsulation of highly motile single zoospores for phenotypic screening of an antioomycete chemical     

Yang H  Qiao X  Bhattacharyya MK  Dong L 《Biomicrofluidics》2011,5(4):44103-4410311

Highly motile Phytophthora sojae (P. sojae) zoospores of an oomycete plant pathogen and antioomycete candidate chemicals were encapsulated into microdroplets. Random fast self-motion of P. sojae zoospores was overcome by choosing an appropriate flow rate for a zoospore suspension. To influence stochastic loading of zoospores into a microfluidic channel, a zoospore suspension was directly preloaded into a microtubing with a largely reduced inner diameter. A relatively high single zoospore encapsulation rate of 60.5% was achieved on a most trivial T-junction droplet generator platform, without involving any specially designed channel geometry. We speculated that spatial reduction in the diameter direction of microtubing added a degree of zoospore ordering in the longitudinal direction of microtubing and thus influenced positively to change the inherent limitation of stochastic encapsulation of zoospores. Comparative phenotypic study of a plant oomycete pathogen at a single zoospore level had not been achieved earlier. Phenotypic changes of zoospores responding to various chemical concentration conditions were measured in multiple droplets in parallel, providing a reliable data set and thus an improved statistic at a low chemical consumption. Since each droplet compartment contained a single zoospore, we were able to track the germinating history of individual zoospores without being interfered by other germinating zoospores, achieving a high spatial resolution. By adapting some existing droplet immobilization and concentration gradient generation techniques, the droplet approach could potentially lead to a medium-to-high throughput, reliable screening assay for chemicals against many other highly motile zoospores of pathogens.  相似文献   

高校创业教育社会支持体系构建     

张兄武  刘轩  徐银香 《科技创业月刊》2021,34(1):129-134

高校创业教育有着显著的社会实践性,对社会资源的依赖性强,提高高校创业教育质量,破解大学生低创业率与低成功率"两低"问题需要广泛的社会支持.对创业教育认识不够、内生动力不足以及互动机制不健全等原因,导致高校创业教育社会支持的不足.实现优势互补、相互配合、资源共享,增强高校创业教育社会支持效果,需要构建构成要素明确、角色定位清晰、保障机制健全的"六方协同"的高校创业教育社会支持体系.  相似文献   

烟草商业企业财务共享服务中心建设探究与实践     

陈璇 《科技创业月刊》2021,34(9):61-63

近年来,随着财务数字化和财务职能转型,烟草行业财务智能化建设不断深入,多数商业企业探索建设FSSC(财务共享服务中心).FSSC作为一种起源于20世纪80年代的先进管理模式,在实践中有着成熟的应用经验,但是烟草行业作为特殊行业,兼具企业和行政双重职能,在建设过程中存在较多特殊性,无法照搬照抄.从烟草行业智能财务建设背景出发,阐明建设财务共享服务中心的必要性,梳理实践中遇到的困境,提出"小步快走,分步实施"的总体思路,从顶层设计、配套制度、数据挖掘、应用导向等方面提出针对性措施.  相似文献