项目教学在高职《音视频编辑与制作》课程中的探索与实践

以《音视频编辑与制作》课程为例,按照“以培养学生职业能力为核心,以实际工作过程为导向,以多媒体作品的制作流程为主线”的总体设计要求,构建和设计项目课程的教学内容,并对该课程在项目教学改革做了深入的探索与实践.     

《微机维修技术》课程教学改革实践

介绍了通过对《微机维修技术》这门课程进行教学改革实践,确定了本课程的课程目标、教学组织安排和考核内容与方法,并在教学组织安排中讲到了教学组织形式、课程实施、教师指导方法和教学效果等方面。通过实践,效果显著。     

动态模式识别算法的GPU平台实现

研究动态模式识别算法在GPU并行计算平台的实现。随着GPGPU(通用计算图形处理器)硬件的发展,基于GPU的大规模并行计算技术将有效地处理动态模式识别算法带来的海量计算问题。文中通过介绍动态模式识别算法,对算法中涉及的巨大计算量进行分析,并针对性地对其中密集计算部分进行并行化分解,移除原算法中在执行中存在的依赖关系,最终得到算法在特定的GPU平台———Jacket上的并行计算实现。实例验证表明,相比于原CPU串行程序,在GPU上运行的并行化程序能实现明显加速,因而具有很好的工程应用价值。     

我国绿色水电认证实施策略探讨

在当前社会基础和技术条件下,我国绿色水电认证工作已经具备了开展试点评价的条件。提出了在生态流域、健康河流与绿色水电三个层面的整体框架下,开展绿色水电试点评价标识工作的实施策略,即以设立"绿色水电示范项目"为切入点,编制《绿色水电评价标识管理办法(试行)》作为工作依据,通过提供财政补贴、电价补偿等激励措施,分类、分期地开展试点评价与标识工作,最终全面、规范地实施我国绿色水电认证,促进人水关系和谐,实现水电开发与生态环境的协调发展。     

TinyPBC: Pairings for authenticated identity-based non-interactive key distribution in sensor networks

Key distribution in Wireless Sensor Networks (WSNs) is challenging. Symmetric cryptosystems can perform it efficiently, but they often do not provide a perfect trade-off between resilience and storage. Further, even though conventional public key and elliptic curve cryptosystems are computationally feasible on sensor nodes, protocols based on them are not, as they require the exchange and storage of large keys and certificates, which is expensive.Using Pairing-Based Cryptography (PBC) protocols parties can agree on keys without any interaction. In this work, we (i) show how security in WSNs can be bootstrapped using an authenticated identity-based non-interactive protocol and (ii) present TinyPBC, to our knowledge, the most efficient implementation of PBC primitives for 8, 16 and 32-bit processors commonly found in sensor nodes. TinyPBC is able to compute pairings, the most expensive primitive of PBC, in 1.90 s on ATmega128L, 1.27 s on MSP430 and 0.14 s on PXA27x.     

矩形乘法器的另一结构设计

文章给出了矩形乘法器的另一个结构设计,该设计在计算速度上优于文献[1]的方案而劣于文献[2]的方案,在流水线分级方面则比文献[2]的方案有灵活性。这一实现把大整数乘的数据相关之时间代价降为1个二选一选通器加上3位加法器所需的时间,即把乘法器流水线的节拍时间值降到了该值,从而大大提高了用流水线实现大整数乘的效率。在某些应用中,用矩形乘法器来实现平行四边形乘法器的功能,则可大大降低规模。     

两种因特网服务模型的比较研究

未来的计算机网络将是一种能够提供多种有同服务,以支持多种不同应用需求,有着集成服务（ｉｎｔｅｇｒａｔｅｄ ｓｅｒｖｉｃｅｓ）支持能力的网络．这种网络是通过在统一的分组交换网络上实现各种不同的服务性能保证机制来构造的．针对止目前广泛研究的两种不同因特网服务模型进行比较研究,分析它们各自组成部件的功能入作用,比较两者之间存在的内在联系,从而进一步提出了一种融合两者优点的组合扩展模型,并以此为基础提出了     

管理员端虚拟主机管理子系统设计与实现分析

进入到21世纪,随着Internet应用的不断深入与发展,越来越多的企事业单位和个人卷入到了Internet的大潮之中,积极开展各种网上活动,更有不少企业或个人纷纷创建自己的站点,于是,虚拟主机服务日益受到互联网平台服务提供商（IPP）的重视。该文主要针对管理员端虚拟主机管理子系统设计与实现进行初步分析。     

.NET平台下MVC设计模式的实现策略

.NET平台下ASP.NET的应用开发得到了越来越多的应用,而MVC设计模式在ASP.NET中得到了充分的实现和支持。该文对.NET技术结合MVC设计模式的三层架构进行了深入剖析,给出了一个三层架构模型及各层的实现策略,该模型及实现策略对于web应用开发而言,能够实现系统的设计目标,具有通用性。     

A multi-level, multi-theory perspective of information technology implementation

Abstract.  Much of information technology (IT) implementation research has focused on individuals' acceptance of IT by examining their behaviour when faced with new IT and the antecedents of these behaviours. As they are frequently undertaken within a project framework, IT implementations also entail the application of project management practices in order to be successful. Based on the premise that antecedents of lower level theories are frequently determined by the outcomes of a higher level theory, the present paper illustrates how organizational-level decisions, examined from the perspective of economics theories, can help explain the antecedents of project risk management at the project and individual levels. To do so, the paper describes an IT implementation effort which went through three phases; the first two of which were abandoned versions of the same project. An organizational-level analysis of the case from an economics perspective and its project-level analysis from a risk management perspective show how organizational-level decisions influenced the antecedents at the project and individual levels, providing a more complete understanding of the IT implementation in question, an understanding which neither a theory approach nor a level perspective could provide on its own.