多结构形式小通道液冷板散热性能对比研究

小通道冷板作为一种有效的热控装置,已被广泛应用于高热流密度电子器件的热管理领域。文中以通道特征尺寸为2 mm 的串行、并行以及射流冲击/小通道混合液冷板为研究对象,旨在获取这3种结构形式冷板的极限散热能力和流动阻力损失的差异。研究结果表明：在相同冷却工质流量条件下,3种冷板的散热功率由大到小依次为串行通道、并行通道、射流冲击/小通道混合液冷板;串行通道冷板的板内阻力损失明显大于其余两者;在综合考虑压力损失和散热性能的基础上,根据不同热源热流密度条件选择合适的冷板结构,有望满足特定应用的需求。该研究可供小通道液冷板的设计和优化参考。     

大型直流电机采用短路法无火花换向区域的测定试验及分析

阐述了大型直流电机不能采用GB1311-89介绍的四种短路加载方式时,采用西门子短路法进行无火花换向区域的测定试验,经多年实践证明是安全可靠的.     

Edge Caching in Blockchain Empowered 6G

The sixth generation(6G)of wireless cellular networks is expected to incorporate the latest developments in network infrastructure and emerging advances in technology.In the age of 6G,edge caching technology will evolve towards intelligence,dynamics,and security.However,the security problems of edge caching,including data tampering and eavesdropping,are seldomly considered in most literatures.In this paper,we consider the two-hop edge caching where the blockchain and physical layer security technologies are adopted to prevent data from being tampered with and eavesdropped.We design blockchain-based framework to guarantee the reliability of important data such as the frequency of contents and jointly optimize content caching probability and redundancy rate to maximize the secure transmission probability.Extensive simulation shows that our optimization scheme can significantly improve the secure transmission probability of edge cache network,whether facing the threat of independent eavesdropping or joint eavesdropping.     

基于多重线性回归模型的翻译等价对获取

翻译等价对在词典编纂、机器翻译和跨语言信息检索中有着广泛的应用。文章从双语句对的译文等价树中抽取翻译等价对。使用译文直译率、短语对齐概率和目标语-源语言短语长度差异等特征对自动获取的等价对进行评价。提出了一种基于多重线性回归模型的等价对评价方法,并结合N-Best策略对候选翻译等价对进行过滤。实验结果表明:在开放测试中,基于多重线性回归模型的等价对评价及过滤方法其性能要优于其它方法。     

基于位置的SIP推送(PUSH)服务

文章首先讨论了PUSH服务的特点,然后提出了一个可以跨越移动网络和SIP网络的PUSH服务模型,此模型包括“服务提供域”和“网络运营域”两个网络。“服务提供域”主要由“PUSH应用”模块组成;“网络运营域”则架构在完整的SIP网络之上,其构成模块同一般SIP网络的元素相似。两网络是通过“PUSH网关”实现交互的,此组件归属于SIP网络运营域。文章最后详细描述了PUSH服务实验流程和实验成果。     

流程企业生产过程集成建模方法研究

针对流程企业对市场变化反应较慢的缺点,提出了流程企业的生产过程物流、资金流和工作流集成建模方法。利用物流模型生成资金流模型,通过对资金流的优化实现物流的优化,在物流优化的实现阶段,将人员的安排以工作流模型的方式集成到物流模型中来,从而实现物流、资金流和工作流的集成建模。利用该集成模型进行决策,可提高企业对市场的反应速度。     

超长周期大地电磁数据采集系统的设计与实现

超长周期大地电磁探测是研究大陆岩石圈导电性结构的有效方法之一.针对超长周期宽频带大地电磁数据的特点和采集技术要求,首次使用CIRRUS LOGIC公司生产的CS5372和CS5376A模数转换及数字滤波套片,建立了低功耗、低采样率、多通道的长周期智能化数据采集系统.并面向系统开发过程,提出该套片与FPGA芯片EP1K300QC208-3组合使用中的软硬件设计.     

环境友好型缓蚀剂对铜的缓蚀作用研究

将钨酸钠和聚天冬氨酸这两种环境友好型水处理药剂有机结合,采用静态挂片实验法,对铜的缓蚀作用进行复配研究,并提出了一个最佳的缓蚀剂配方.     

QoS-Aware Composite Services Retrieval

For current service-oriented applications, individual web service usually cannot meet the requirements arising from real world applications, so it is necessary to combine the functionalities of different web services to obtain a composite service in response to users＇ service requests. In order to address the problem of web service composition, this paper proposes an efficient approach to composing basic services in case no any individual service can fully satisfy users＇ requests. Compared with the general strategies adopted in most previously proposed approaches where only the best composition solution is produced, the QoS-aware service composition approach is given and top k solutions in the framework are provided, rather than focusing on obtaining the best composition solution, since the presented approach allows more candidates that are likely to meet the requirements of the users. The approach is based on a succinct binary tree data structure, and a system,named ATC （Approach to Top-k Composite services retrieval） system is implemented. In ATC, Qos is taken into account for composite service, and a heuristic-based search method is proposed to retrieve top k composite service. Some extensive experiments are designed and two web service benchmarks are used for performance study. The experimental results snow that the proposed approach can assure high precision and efficiency for composite service search.