无线网络在大学图书馆网络建设中的应用设计--以四川大学图书馆为例   总被引：5，自引：0，他引：5  

林兴国 《四川图书馆学报》2004,(2):55-58

简介了无线网络的技术基础，井以四川大学图书馆为例，结合图书馆网络现状，阐述了基于IEEE802．11b标准建立符合大学图书馆服务要求的无线网络建设方案和应注意的关键问题。  相似文献   

无线局域网技术在图书馆的应用   总被引：3，自引：0，他引：3  

巩林立 《现代图书情报技术》2004,20(6):38-41

随着无线局域网技术标准的不断推出以及基于这些标准的无线产品的出现, 无线局域网的应用和普及已发展到了一个新阶段。无线局域网技术的发展对图书馆网络的建设有何影响, 如何将无线局域网技术应用到图书馆中去, 已成为业界人士日益关注的焦点。本文介绍了无线局域网相关的概念和技术, 从应用角度给出了图书馆无线局域网的几种组建模式, 并结合实际, 探讨了图书馆无线电子阅览室的创建过程。  相似文献   

无线局域网在图书馆的应用   总被引：7，自引：0，他引：7  

邹荣  姜爱蓉 《现代图书情报技术》2004,20(8):74-76

无线局域网是利用无线通信技术实现网络互联，与有线网络相比，无线局域网最主要的优势在于可以不受布线条件的限制，在有线网络所不能达的地方也能提供方便地网络接入。2002年4月清华大学图书馆采用符合 IEEE 802.11b标准的产品建立了无线局域网。本文介绍了清华大学图书馆无线局域网的建立及用户使用情况，并且讨论在图书馆建立无线网
络的特点和发展趋势。  相似文献   

基于802.11b的社区无线信息终端的设计与实现     

李靖平 《黎明职业大学学报》2006,(1):36-40

介绍了基于IEEE 802.11b无线局域网标准和PCMCIA无线网卡设计社区无线信息终端,并以Motorola最新推出的高速超低功耗微控制器MC9S08GB32作为社区无线信息终端的控制器。  相似文献   

不同溶剂提取法对赤胫散中总黄酮含量的影响   总被引：2，自引：1，他引：1  

王毅红  王绪英 《六盘水师范高等专科学校学报》2004,16(6):19-20

分别以80%乙醇、甲醇为提取溶剂,芦丁为标准品,用分光光度法于510nm处测定不同溶剂提取时赤胫散中总黄酮含量分别为3.46%、3.17%。  相似文献   

基于IEEE 802.11的Ad Hoc网络中的一种节能路由改进算法*     

黄景博  洪佩琳  卢汉成  张幸 《中国科学院大学学报》2008,25(1):93-100

根据IEEE 802.11协议在链路层提供有限次数链路重传的特点,提出了一种在基于IEEE 802.11的移动Ad Hoc网络（MANET）中保证可靠通信的节能路由改进算法——ERRC（Energy-efficient Routing algorithm for Reliable Communication in IEEE 802.11-based MANET）,它可以方便地应用于MANET中现有的反应式路由协议。ERRC分析并建立了适合于IEEE 802.11情况的重传模型和能耗模型,提供了在发送数据分组时的功率控制机制,在节点选路时综合考虑了分组错误概率、节点代价函数的影响。仿真结果表明,ERRC算法可以显著提高网络生存期,在节省能耗方面比没有考虑分组错误概率的节能路由算法更为精确。  相似文献   

Activated Carbon Fabric Mask Reduces Lead Absorption and Improves the Heme Biosynthesis and Hematological Parameters of Battery Manufacturing Workers     

Jyotsna A. Patil  Mandakini S. Kshirsagar  Arun J. Patil 《Indian journal of clinical biochemistry : IJCB》2021,36(1):94

Activated carbon fabrics (ACF) mask prevents the absorption of lead and reduce its adverse effects of human health. Aim of this study to know the blood lead level and its effects on heme biosynthesis and hematological parameters after using 2 months activated carbon fabric mask of battery manufacturing workers (BMW). Blood lead level, heme biosynthesis and hematological parameters were measured by using standard method. Blood lead level (P < 0.001, − 13.5%) was significantly decreased, activated δ-aminolevulinic acid dehydratase (P < 0.001, 11.97%) and non-activated δ- aminolevulinic acid dehydratase (P < 0.001, 23.17%) enzyme activity were significantly increased, however, the ratio of activated to Non-activated δ- ALAD (P < 0.001, − 10.13%) was significantly decreased, urinary excretion of δ- aminolevulinic acid (P < 0.001, − 10.49%) and porphobilinogen (P < 0.001, − 7.38%) were significantly decreased after using 2 months ACF mask as compared to before using mask of BMW. Hematological parameters i.e Hb (P < 0.05, 13.42%), PCV (P < 0.05, 7.23%), MCV (P < 0.05, 1.9%) were significantly increased and total WBC count (P < 0.05, − 5.18%) was significantly decreased after using 2 months ACF mask as compared to before using mask of BMW. Two months using ACF mask reduces the blood lead level and improves the δ-ALDH activity and hematological parameters, decreases the urinary excretion of δ-ALA, PBG of battery manufacturing workers. Therefore, the regular using of ACF mask is beneficial to prevent the lead absorption and its adverse effects on human health.  相似文献   

Determination of Acid β-Galactosidase Activity: Methodology and Perspectives     

Radoslaw Kwapiszewski  Justyna Szczudlowska  Karina Kwapiszewska  Michal Chudy  Zbigniew Brzozka 《Indian journal of clinical biochemistry : IJCB》2014,29(1):57-62

Early, accurate diagnosis of lysosomal storage disorders is a major challenge, even for trained specialists. Finding innovative, accurate diagnostic methods, and high throughput, cost-effective tools are crucial to medical progress and will contribute to improved quality of life. The goal of this work was to improve currently used protocols to determine activity of acid β-galactosidase, and discuss the possibility analysing lysosomal enzymes with microfluidic systems. A principle of the determination of β-galactosidase activity was fluorometric measurement of a deprotonated form of 4-methylumbelliferone released in the enzymatic reaction. Measurements were performed using Jurkat T cells as a source of the enzyme. We observed the temperature-dependent substrate inhibition effect and determined the substrate (4-MU-β-d-galactopyranoside) concentration which should be used to determine acid β-galactosidase activity at 37 °C (0.8 mM) and at room temperature (0.6 mM). We proved that the sample incubation time may be significantly reduced to only a few minutes. We also showed that the amount of alkaline buffer used to stop the enzymatic reaction may be minimized and even, in some cases, eliminated. The presented results show how the sensitivity of the available methods to diagnose patients suffer from gangliosidosis GM1 or Morquio B disease can be improved. The proposed method may be easily implemented with microfluidic systems, which currently are promising tools for point-of-care applications.  相似文献   

无线局域网IEEE802.11标准浅析     

黄颖  李伟 《赣南师范学院学报》2004,25(6):60-61

介绍无线局域网的IEEE802.11标准的常用标准,及其为满足不同要求指定的特殊标准,分析了各具体标准的基本特性、特征,以及它们的适用范围和发展前景,对读者了解WLAN的IEEE802.11系列标准的有关知识有一定的帮助.  相似文献   

以特色打造高职教育品牌     

蔡泽寰 《襄樊职业技术学院学报》2002,1(1):29-32

在我国,高等职业技术教育是一种新兴的高等教育类型。在激烈竞争中,要办好高职教育,必须以特色取胜。而要打造高职教育特色品牌,必须充分认识其本质特征,更新办学观念。要大力推行“六双”改革,按职业岗位（群）设置专业,按照“厚基础,宽口径,强技能”的原则建立基础知识、专业理论和职业技能三大“平台”, 建设“理论型”、“技能型”、“双师型”并重的师资队伍和产教研有机结合的办学机制。  相似文献