基于ARM的智能家居监控系统设计   总被引：1，自引：0，他引：1  

丁志文  周悦  韩中华 《科技广场》2008,(12)

本文提出了一种基于ARM微控制器的智能家居监控系统,采用CAN总线方式进行远程数据通信监控操作,结合监控管理软件平台对家居环境状态进行有效监控,降低事故的发生率。本系统硬件实现方案相比基于8位单片机方案具有很高的成本优势,硬件结构简单,很适合智能家居推广与应用。  相似文献   

关于以Intelligence Studies取代Information Studies的建议   总被引：1，自引：0，他引：1  

包昌火 《情报理论与实践》2009,32(7)

值此<情报理论与实践>创刊45周年之际,从国际上出现的信息化和情报化两大潮流的历史背景出发,根据我国情报学界和情报学研究存在的诸多弊端,本文提出了将该刊英文译名由InformationStudies改为Intelligence Studies的建议,以期推动我国Intelligence Studies研究的发展.  相似文献   

大学英语教学中跨文化交际能力的培养     

班红玲 《时代教育》2007,(6)

  相似文献   

Calibrating the tilted scale: (re)constructing fairness in fair wage discourse     

Zhuo Ban 《Journal of Applied Communication Research》2018,46(4):409-428

Guided by the practical question, ‘What is a fair wage?’, this paper takes a culture-centered approach to the discursive construction of a fair wage in the context of industrialized labor. Specifically, this study juxtaposes discursive constructions within (a) corporate social responsibility (CSR) communications concerning wage policies and practices and (b) industrial workers’ narratives about their experiences with wages. Thus, I demonstrate a mutually constitutive process in which the meaning of ‘fair wage’ results from and reifies the structures of supply chain labor. Specifically, I explore how wage fairness is understood in the context of legal and government mandates, international organizations’ recommendations, and the issue of labor sustainability. The culture-centered emphasis of the study explores the possibility of bringing alternative voices to mainstream articulations of labor rights.  相似文献   

多校区读者的信息行为比较研究--以广东药学院为例     

班俊峰 《数字图书馆论坛》2014,(2):54-58

文章以广州市和中山市两地区同学院用户群为研究对象,对两地用户进行问卷调查和访谈调查,从信息需求、信息获取和信息利用行为三个方面调查分析两地用户信息行为的现状,并在此基础上,对两地用户信息行为进行比较,分析两地用户信息行为的共性和差异性,对多校区不同用户的群体提出有针对性的信息服务对策。  相似文献   

Formation of lipid bilayer membrane in a poly(dimethylsiloxane) microchip integrated with a stacked polycarbonate membrane support and an on-site nanoinjector     

Wei Teng  Changill Ban  Jong Hoon Hahn 《Biomicrofluidics》2015,9(2)

This paper describes a new and facile approach for the formation of pore-spanning bilayer lipid membranes (BLMs) within a poly(dimethylsiloxane) (PDMS) microfluidic device. Commercially, readily available polycarbonate (PC) membranes are employed for the support of BLMs. PC sheets with 5 μm, 2 μm, and 0.4 μm pore diameters, respectively, are thermally bonded into a multilayer-stack, reducing the pore density of 0.4 μm-pore PC by a factor of 200. The BLMs on this support are considerably stable (a mean lifetime: 17 h). This multilayer-stack PC (MSPC) membrane is integrated into the PDMS chip by an epoxy bonding method developed to secure durable bonding under the use of organic solvents. The microchip has a special channel for guiding a micropipette in the proximity of the MSPC support. With this on-site injection technique, tens to hundreds of nanoliters of solutions can be directly dispensed to the support. Incorporating gramicidin ion channels into BLMs on the MSPC support has confirmed the formation of single BLMs, which is based on the observation from current signals of 20 pS conductance that is typical to single channel opening. Based on the bilayer capacitance (1.4 pF), about 15% of through pores across the MSPC membrane are estimated to be covered with BLMs.  相似文献   

Effect of electrical double layer on electric conductivity and pressure drop in a pressure-driven microchannel flow     

Heng Ban  Bochuan Lin    Zhuorui Song 《Biomicrofluidics》2010,4(1)

The effect of an electrical double layer (EDL) on microchannel flow has been studied widely, and a constant bulk electric conductivity is often used in calculations of flow rate or pressure drop. In our experimental study of pressure-driven micropipette flows, the pipette diameter is on the same order of magnitude as the Debye length. The overlapping EDL resulted in a much higher electric conductivity, lower streaming potential, and lower electroviscous effect. To elucidate the effect of overlapping EDL, this paper developed a simple model for water flow without salts or dissolved gases (such as CO₂) inside a two-dimensional microchannel. The governing equations for the flow, the Poisson, and Nernst equations for the electric potential and ion concentrations and the charge continuity equation were solved. The effects of overlapping EDL on the electric conductivity, velocity distribution, and overall pressure drop in the microchannel were quantified. The results showed that the average electric conductivity of electrolyte inside the channel increased significantly as the EDL overlaps. With the modified mean electric conductivity, the pressure drop for the pressure-driven flow was smaller than that without the influence of the EDL on conductivity. The results of this study provide a physical explanation for the observed decrease in electroviscous effect for microchannels when the EDL layers from opposing walls overlap.  相似文献