SIP协议及其在网络中的应用

随着下一代互联网技术的不断发展,人们将不仅仅满足于将现有的PSTN(公共电话网)业务移植到IP网,而是需要电信运营商提供一个优秀的体系架构,将话音业务、视频业务、新兴的互联网业务整合到一个统一的框架中.SIP协议就是其中的关键纽带.     

A Novel Whiteheadean Science Program for 14-16 Year Olds in England and Wales

A novel “Whiteheadean” science program was initiated in England and Wales in September 2006. Following a critical House of Commons report in 2002, the government altered the National Curriculum targets and thus forced the Examination Boards to alter their specifications in order to come in line. Assessment at GCSE level (i.e., the 14-16 year cohort) was criticised for: a) failing to inspire students to continue with science, b) discouraging students from thinking for themselves, c) neglecting contemporary science, d) lacking flexibility, and e) making practical work into a tedious and dull activity. The British government has insisted that all pupils in state funded schools must know the names of some modern scientists and their work. They must discuss some current scientific problems. History and philosophy of science is included under the topic heading “How Science Works.” In Chemistry these objectives have destroyed the traditional linear top-down sequential approach of teaching into an approach based more closely on Whiteheadean lines (cf., the ideas expressed in The Aims of Education, 1926, Chapters 1-3).     

从目的论看林语堂英译《浮生六记》

翻译的"目的论"认为,所有翻译要遵循的首要法则就是"目的法则"。翻译行为所要达到的目的决定整个翻译行为的过程。由于译文预期达到的目的或功能不同,决定它在翻译过程中处理方法的不同。翻译不是纯语言的转换活动,它体现了不同文化之间的交流。因此,如何处理文化差异现象是不容忽视的问题。依据"目的法则",林语堂在《浮生六记》的英译本中善于兼用归化和异化的方法,既符合英语的表达习惯,又保留了中国文化的特点,达到了两者的满意结合。     

转型、困惑与出路——美国“进步主义运动”略论

19、20世纪之交美国社会经济的巨变和转型促成了“进步主义运动”的兴起。运动的倡导者源自美国社会各主要阶层和集团，共同的社会责任感和危机意识将其维系在一起。作为自由主义改革的集大成者，这场运动从19世纪后期美国的各类改革实践中汲取营养，以之作为渊源和动力并有所超越。由于该时期美国社会转型的复杂性，“进步主义运动”也蕴涵诸多悖论，对其加以准确释读对于观照普遍意义上的资本主义转型不无裨益。     

基于Unity3D反恐排爆机器人虚拟仿真设计

基于虚拟现实技术开发软件对反恐排爆机器人虚拟实验系统进行功能开发,该系统应用于反恐排爆机器人教学,建立D-H机械臂坐标系,实现反恐排爆机器人结构认知、装配操作、工作空间、关节运动控制,实现人机交互,利用D-H参数法建立反恐排爆机器人运动学模型,进行了正、逆运动学求解及轨迹规划。系统有着较好的沉浸性与交互性,能够完成反恐排爆机器人的虚拟实践教学。     

Thermodynamic Analysis and Comparison on Low Temperature CO_2-NH_3 Cascade Refrigeration Cycle

Intheapplicationsofindustrialandcommercialrefrig erationsystem ,iftherequiredrefrigerationtemperatureisverylow ,theconventionalvaporcompressionsystemisdiffi culttomeettherequirementbecausewhenthedifferencebe tweentheevaporatingtemperatureandthecondensingtemper atureissohighthatitishardtofindarefrigeranttomeettheneedsasthecondensingpressureisnottoohighandtheevap oratingpressureisnottoolow .Whentherefrigeratingtemper atureisverylow ,thecascaderefrigerationcycleissuitabletobeused .Itcannotonlysat…     

超导体中的双体模型

在戈德（Gorter．C．J）和卡西米尔（Casimir．H．B．G）的二流体模型的基础上，建立了适合于高温超导体的新模型──双体模型，通过论证，双体模型是合理的．     

Cu-ZnO/Al2O3催化仲丁醇制备甲乙酮

用Cu-ZnO/Al2O3催化仲丁醇制备甲乙酮。研究了催化剂的焙烧温度和焙烧时间、仲丁醇脱氢反应的温度和压力以及仲丁醇的流量对仲丁醇转化率和甲乙酮选择性的影响。结果表明,催化剂的焙烧温度为300-400℃,焙烧时间为6h,脱氢反应的温度为300℃,压力为0.2Mpa,仲丁醇的流量为140mL/h时,仲丁醇的转化率和甲乙酮的选择性较好。     

Creativity, integrativism and a pedagogy of connection

A case is made for working in higher education across and between disciplines, variously known as inter- and multidisciplinarity. Integrativism is proposed as an inclusive term for these different but related modes of academic work. Working integratively is presented as a creative activity. The application of integrativism to the curriculum leads to the notion of a pedagogy of connection. Sociocultural theory is a theoretical foundation for a pedagogy of connection which consists of a framework for focusing on the contexts of connection and tools for making connections. Activity theory is the basis of analysing context and analogy and conceptual blending are examples of tools. The pedagogy of connection is demonstrated through the example of a sense of place. The example takes the form of a design experiment.     

8253定时/计数器方式3计数过程的实验研究

对于我系选用教材和部分参考资料关于8253定时/计数器在方式3的计数过程中表述中所存在的矛盾之处,基于武汉众友电子科技有限公司的接口实验台,提出了一个探究8253计数过程的实验方案。通过分析实验结果,指出了正确的计数过程。