超声弹性成像参数联合血清MK和VEGF对分化型甲状腺癌的诊断价值及与肿瘤恶性程度关系研究

本研究选取了分化型甲状腺癌(DTC)患者106例为甲状腺癌组,同期106例甲状腺腺瘤患者为甲状腺腺瘤组,检测比较了两组患者的超声弹性成像参数(弹性比值、蓝色面积比值)、血清中期因子(midkine,MK)、血管内皮生长因子(VEGF)水平.研究结果发现,弹性比值、蓝色面积比值、血清MK和VEGF水平与DTC患者淋巴结转...     

面向服务架构汽车软件开发方法和实践

面向服务架构(SOA)是智能网联汽车软件的主要设计模式之一,为有效设计SOA汽车软件,发挥SOA软件设计模式的优势,提出了一种SOA汽车软件分层模型,描述了基于该模型的两种SOA汽车软件开发方法,并介绍了相应的开发实践,最后描述了所开发的SOA汽车软件在域控制器上的部署.     

国防信息基础设施的建设与管理

讨论了国防信息基础设施的概念,分析了美军国防信息基础设施的发展状况、实施方法、主要途径,提出了发展我军信息基础设施的技术途径和措施建议.     

移动支付实现内容消费增值业务方案研究

提出了基于移动支付技术的内容消费概念,分析了移动支付的技术特点,讨论了具体的实现方案和增值业务发展模式,并设计了应用案例.针对当前内容消费的市场现状,给出了发展综合自助终端硬件平台和手机端增值业务综合操作软件平台的建议.     

From application service provision to service-oriented computing: A study of the IT outsourcing evolution

IT outsourcing is not a new concept. Originating from the early 60’s in the form of time sharing, IT outsourcing has evolved to the application service provision (ASP) model, in the late 90’s to pure services in the beginning of the century. Services, and their major representative web services, are actually the next phase of the movement toward Internet-based componentized software, known in the not so distant past as ASP. As the continuous expansion of the Internet and its relating technologies creates new marketing opportunities, traditional monolithic architectures are giving way to service-oriented computing (SOC), the architecture that enables service provision. SOC permits the utilization of large systems which are comprised of self-containing building blocks: services. Services may be made public, searched, reused and combined to form complex business processes while in the same time retaining a significant level of flexibility. Services and SOC have emerged as a response to a fundamental shift in enterprise business culture that started at the late 90’s. Although they are promising as an IT outsourcing enabler, many issues need to be dealt with before they can be considered suitable for wide adoption. These issues are of technological, business, economic and cultural nature and they were also faced by ASPs in the past. It is worth revisiting the successes and failures of the ASP model in order to get a better understanding of the evolving IT outsourcing industry. In this work, we describe the evolution of service provision from its initial form as software application, through the application service provision era and towards the new trend of web services.     

基于XML Web Service身份认证的研究与实现

文章讨论了在多用户环境下Web Service的身份认证问题，分析了如何确保只有经过授权的用户才能访问Web Service提供的服务。并给出了两种切实可行的解决方案。     

3G"新"彩铃引领3G新体验

3G彩铃在2G彩铃的基础上进一步演化，具备了个性化铃声和影像。用户可以自己设定动画、视频等内容。通过介绍3G彩铃的业务平台结构，描述业务平台的核心部分一业务服务器的功能。介绍了3G彩铃实现的原理基础，最后对3G彩铃业务的发展方向进行了阐述。     

深化全面质量管理五管齐下创“熊猫”名牌

介绍了熊猫电子集团公司以全面质量管理为基础，从产品质量、科技研发、规模经济、服务和市场竞争这五个方面入手，创建熊猫名牌的经验。     

Applications of SMP Bounds to Multi-class Traffic in High-speed Networks

In this paper, we consider the stochastic fluid-flow model of a single node in a high-speed telecommunication network handling multi-class traffic. The node has multiple buffers, one for each class of traffic. The contents of these buffers are multiplexed onto a single output channel using one of the service scheduling policies: the Timed Round Robin Policy or the Static Priority Service Policy. The Quality of Service requirements for each class are based on cell loss probabilities. Using effective bandwidth methodologies and the recently developed bounds for semi-Markov modulated traffic, we solve call admission control problems for the two service scheduling policies at this node. We compare the performance of the effective bandwidth methodologies and the SMP bounds technique. We also numerically compare the performance of the two service scheduling policies.     

Pricing based adaptive scheduling method for bandwidth allocation

In this paper we present a packet scheduling method which guarantees bandwidth of the connection and optimizes revenue of the network service provider. A closed form formula for updating the adaptive weights of a packet scheduler is derived from a revenue-based optimization problem. The weight updating procedure is fast and independent on the assumption of the connections’ statistical behavior. The features of the algorithm are simulated and analyzed with and without a call admission control (CAC) mechanism. We also show in context with the CAC procedure a mechanism for guaranteeing a specified mean bandwidth for different service classes.