非线性二阶边值问题解的存在性

利用上下解方法讨论了一类二阶边值问题解的存在性问题 ,并给出了一种求解方法。     

无线传感器网络的SPIN协议研究

无线传感器网络是计算机科学技术的一个新的研究领域，是传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术相结合的产物，具有广阔的理论研究和应用前景。本文对一种无线传感器网络路由协议SPIN-PP作了分析，并针对无线传感器网络的特点对其进行了一些改进工作，经NS2上的仿真结果表明这是一种有效的改进方案。     

孤石花岗岩残积土层中挖孔桩设计评述与改进

在肯定人工挖孔桩的技术性能、尤其是在阐明含孤石花岗岩残积土层中独特优点的基础上，重点论述适当扩底、合理配筋与简化柱下单桩基础桩帽设计，在保证安全的前提下带来的经济效益。     

第4代白盒测试方法的理论研究

介绍了第4代白盒测试方法的理论,描述了3个关键领域内9项关键特征的概念与固有特征。同时介绍了白盒测试发展历程,对比说明了第4代白盒测试方法(4GWM)与以往测试方法的异同及优化要素。     

Time allocation scheme in IEEE 802.15.3 TDMA mechanism

In network with a shared channel in TDMA mechanism, it is a core issue to effectively allocate channel time to provide service guarantees for flows with QoS requirements. This paper proposes a simple and efficient time allocation scheme called MES-ESRPT (MCTA at the End of Superframe-Enhanced Shortest Remaining Processing Time) for delay-sensitive VBR traffic in accordance with IEEE 802.15.3 standard. In this algorithm, PNC (piconet coordinator) allocates one MCTA (Management Channel Time Allocation) for each stream which is the process of communication at the end of superframe. During the MCTA period, each transmitter should report current fragments number of the first MSDU (MAC Service Data Unit) and the fragments number of the remainder MSDUs to PNC. In the next superframe, PNC firstly allocates part CTAs (Channel Time Allocation) for each stream based on the remainder fragments number of the first MSDU by SRPT rule, then allocates remainder CTAs for each stream based on all fragments number of remainder MSDUs by the same SRPT rule. Simulation results showed that our proposed MES-ESRPT method achieves significantly better performance in QoS for multimedia streams compared to the existing schemes.     

图书馆学知识边界的凝聚与学科认同建立-基于《图书馆学季刊》共词网络的案例研究

学科的知识边界是构建学科认同的必要条件,以《图书馆学季刊》为案例,通过共词分析展示民国图书馆学研究的知识边界;研究发现,民国图书馆学研究主要分类6大领域、2大范式,管理范式的图书馆学研究延续至今,文史范式的图书馆学研究逐渐衰退;文史范畴研究的衰退是导致当代图书馆学学科地位和学科认同不高的主要原因。     

文化层次结构模型比较研究

文化结构决定了文化功能实现以及文化的自适应发展模式。同心圆模型把文化划分为由内及外的多个层次,由内到外的层次之间是渐次主导的关系,而由外到内是对这种关系的反应。睡莲模型把同心圆模型中的观念层作了严格区分,以强调“所倡导的”与“所共享的”之间的不一致。目前的文化结构模型都有“把文化分层”的思想,从同心圆模型到睡莲模型,对层次性的强调依次减弱,而对文化系统内部的功能实现机制强调依次上升。不使用“固定层”的概念,而使用“动态块”的概念或许能弥补当前文化层次结构模型的不足。     

Employee Perceptions of E-mail Monitoring from a Boundary Management Perspective

This research contributes to the growing body of literature exploring employee perceptions of workplace communication monitoring and surveillance by developing an explanatory model based on predictions derived from communication boundary management theory (CBM; Petronio, 1991 Petronio , S. ( 1991 ). Communication boundary management: A theoretical model of managing disclosure of private information between marital couples . Communication Theory , 1 , 311 – 335 .[Crossref] , [Google Scholar], 2001 American Management Association . ( 2001 ). 2001 AMA survey: Workplace monitoring and surveillance . Retrieved September 27, 2003, from http://www.amanet.org  [Google Scholar]). Specifically, this study explores the perceptions of workplace e-mail monitoring from a cross-section of 155 workers. The data suggest that when employees feel that there is a large amount of e-mail monitoring and believe that the monitoring is inappropriate, they respond negatively to top management. The implications of these findings are discussed.     

802.11 MAC层协议分析

本文深入了分析802.11MAC子层协议,重点阐述并讨论MAC层结构,访问控制方式、信包重垫等,并对其发展趋势作了展望.     

军用软件的黑盒测试方法综述

在对军用软件进行功能测试时,通常采用黑盒测试方法,常用的黑盒测试方法有等价类划分法、边界值分析法、错误猜测法、因果图法和场景法等。在设计测试用例时针对实际军用软件综合应用这几种黑盒测试方法。