多语言用户界面的实现技术分析

分析和比较4种主要的多语言用户界面的实现技术,列出实现的具体步骤,评价其实现机制特点和应用场合.以Windows为平台,给出在应用系统中实施这些技术的方案.     

智能天线在CDMA2000 1x EV-DO中的实现方案

讨论了智能天线技术及其在CDMA2000 1x EV-DO标准中的应用,否定了有关智能天线应用的传统观点:智能天线最适合用于上下行链路同频点的TDD(时分双工)系统.依据1x EV-DO标准支持上下行链路工作于FDD CDMA/TDMA模式和智能天线(SA)的定向收发信原理,对智能天线技术在CDMA2000 1x EV-DO标准中的实现提出了两种实现方案.两种方案需要估计出上行链路用户的DOA后,即可用一副SA实现单一载波上多个CDMA用户的定向接收,再将该DOA及时用于下行高速数据载波多个TDMA用户的定向发信,可大幅度提高上下行链路的频谱和功率的利用率.     

A Generic TC-Based Method to Find the Weakness in Different Phases of Masking Schemes

Masking is one of the most commonly used Side-Channel Attack(SCA) countermeasures and is built on a security framework, such as the ISW framework, and ensures theoretical security through secret sharing.Unfortunately, the theoretical security cannot guarantee practical security, because several possible weaknesses may exist in the actual implementation. These weaknesses likely come from the masking schemes or are introduced by the implementation methods. Finding the possible weakness of the masking scheme is an interesting and important issue for real applications. In this paper, the possible weaknesses for masking schemes in FieldProgrammable Gate Array(FPGA) design are discussed. It was found that the combinational circuit is the key to the security of masking schemes. The Toggle Count(TC) method and its extension are utilized to evaluate the security of masking schemes in the design phase and the implementation phase separately. Comparing different logic-level simulators for the Xilinx FPGA platform, the behavioral and post-translate simulations are considered as the analysis method in the design phase, while the post-map and the post-route simulations are used to find the weakness during the implementation phase. Moreover, a Standard Delay Format(SDF) based improvement scheme is proposed to significantly increase the effectiveness of the TC model.     

在校园网上实现移动IP技术

分析了移动IP技术的工作机理,提出了在校园网上实现移动IP技术的重要性,同时给出一个在校园网上实现移动IP的具体方案,最后,对移动IP的路由算法,移动IP与无线局域网的结合以及移动IP的安全性等问题进行了探讨。     

基于AHP方法的湖泊群引水方案综合评价体系

针对湖泊群整治中引水活水方案实施前均需对各方案进行可行性分析,本文建立一种基于AHP层次分析方法的综合评价体系(简称为“ESLI”),可以对包含水质改善指标、生态动力学指标、经济指标和感观指标等多目标、多层次的湖泊群引水方案进行综合评价,并将ESLI方法用于福州市西湖左海湖泊群水质改善的方案优选中,为设计与决策提供相对较优的方案集。     

基于软件通信体系结构的软件定义无线电系统

该文主要研究了基于软件通信体系结构(SCA)的软件定义无线电(SDR)系统设计与实现。首先介绍了SCA的相关背景,然后根据SCA的标准设计了基于SCA的SDR系统硬件平台、硬件抽象层(MHAL)、核心框架、波形软件的实现技术方案,最后通过测试波形对该系统的实时性能进行测试和分析。结果表明:基于SCA的SDR系统互操作性和波形可移植性得到很大提高,实时性能可以满足实际应用需求,但依旧是系统的性能瓶颈。     

图像的小波压缩技术及研究进展

讨论了利用离散小波进行图像压缩的方法和特点,其中重点分析了嵌入式零树编码算法.评述了小波图像压缩技术的研究现状,指出小波编码理论在第二代编码技术中的应用前景.     

级联前馈多层神经网络在动态信道分配中的应用

传统的动态信道分配方案既复杂又耗时，本文根据前馈多层神经网络的特点，基于有序信道搜索方案提出了一种具体的动态信道分配的实时实现方法。     

海洋立体监测信息网络服务体系

以台湾海峡及毗邻海域立体监测系统为例，研究海洋立体监测信息网络服务体系的服务内容分类、服务的层次、服务系统总体设计和关键技术实现，针对不同用户类型的需求，提出以We—bGIS和Web Service为基础的技术实现方案，这种多层次海洋立体监测信息网络服务体系，更多地考虑不同用户的需求和监测信息价值的更深层次挖掘和利用。     

基于WIN 9X／NT的机器人控制器高层软件系统的研发技术

介绍基于工控微机（IPC）和WIN 9X／NT操作系统的工业机器人控制高层软件系统的研发技术,详细介绍了机器人软件系统第二层的模块组成和实现方案,并讨论了开发过程中的关键技术。     

重叠网络中QoS机制研究

从应用的角度出发，根据OverQoS的驱动者不同，将基于重叠网的QoS架构分为主机系统驱动型和Overlay ISP驱动型，并剖析了两种OverQoS模型的内在特点，最后提出了相应的技术实现方案。     

Entanglement purification for quantum communication

The distribution of entangled states between distant locations will be essential for the future large-scale realization of quantum communication schemes such as quantum cryptography and quantum teleportation. Because of unavoidable noise in the quantum communication channel, the entanglement between two particles is more and more degraded the further they propagate. Entanglement purification is thus essential to distil highly entangled states from less entangled ones. Existing general purification protocols are based on the quantum controlled-NOT (CNOT) or similar quantum logic operations, which are very difficult to implement experimentally. Present realizations of CNOT gates are much too imperfect to be useful for long-distance quantum communication. Here we present a scheme for the entanglement purification of general mixed entangled states, which achieves 50 per cent of the success probability of schemes based on the CNOT operation, but requires only simple linear optical elements. Because the perfection of such elements is very high, the local operations necessary for purification can be performed with the required precision. Our procedure is within the reach of current technology, and should significantly simplify the implementation of long-distance quantum communication.     

采用数字调制解调实现的无绝缘轨道电路

无绝缘轨道电路是未来轨道电路的发展方向．随着数据通信的发展，传统的ｍｏｄｅｍ设计方法已经过时，数字信号处理技术在数据传输领域中愈来愈广泛．本文主要讨论了无绝缘轨道电路下调制解调数字实现的结构和主要技术．     

线性调频信号源的研制

提出了一种具体的C波段的线性调频信号源的设计方案．该方案是基于最新的直接数字频率合成技术（DDS）和锁相环频率合成（PLL）相结合的结构,利用DDS与PLL进行混频产生所需信号,重点阐述了系统的硬件实现,包括系统设计方案、主要电路模块设计及高速PCB板设计的关键技术等,并针对实际调试过程中的常见问题给出具体的解决方案．     

基于多扫描链相容压缩的距离标记压缩方法

文章提出了一种基于多扫描链相容压缩的距离标记压缩方法,该方法可以有效压缩芯片测试数据量。此方法利用相容压缩和基于差分的编码压缩方法两次压缩测试数据,相比类似的编码测试数据压缩方案,具有压缩测试数据传输协议简单、解压控制过程容易实现的突出特点;对ISCAS-85和ISCAS-89部分标准电路硬故障集的实验结果显示,本文建议的方法在压缩效率以及解压的实现上都明显优于混合码。     

Web平台下动态统计图表的两种实现方案比较研究

针对数据分析统计图表在Web应用程序中动态绘制的特点和要求,在分析研究Owc组件包和Flot插件的基础上,归纳并设计了两种实现方案,并在某酒厂窖池温度数据的分析统计中,对两种方案分别进行了应用实践。通过对两种方案的性能进行分析和对比,提出了一个具备实时刷新效果好、图片存储效率高的综合绘图方案。     

Personalized Real-Time Movie Recommendation System:Practical Prototype and Evaluation

With the eruption of big data,practical recommendation schemes are now very important in various fields,including e-commerce,social networks,and a number of web-based services.Nowadays,there exist many personalized movie recommendation schemes utilizing publicly available movie datasets(e.g.,MovieLens and Netflix),and returning improved performance metrics(e.g.,Root-Mean-Square Error(RMSE)).However,two fundamental issues faced by movie recommendation systems are still neglected:first,scalability,and second,practical usage feedback and verification based on real implementation.In particular,Collaborative Filtering(CF)is one of the major prevailing techniques for implementing recommendation systems.However,traditional CF schemes suffer from a time complexity problem,which makes them bad candidates for real-world recommendation systems.In this paper,we address these two issues.Firstly,a simple but high-efficient recommendation algorithm is proposed,which exploits users' profile attributes to partition them into several clusters.For each cluster,a virtual opinion leader is conceived to represent the whole cluster,such that the dimension of the original useritem matrix can be significantly reduced,then a Weighted Slope One-VU method is designed and applied to the virtual opinion leader-item matrix to obtain the recommendation results.Compared to traditional clusteringbased CF recommendation schemes,our method can significantly reduce the time complexity,while achieving comparable recommendation performance.Furthermore,we have constructed a real personalized web-based movie recommendation system,MovieWatch,opened it to the public,collected user feedback on recommendations,and evaluated the feasibility and accuracy of our system based on this real-world data.     

Deterministic Teleportation Channel Using Bell State Measurements Only

Teleportation schemes based on probabilistic channels usually rely heavily on the implementation of high-dimensional unitary operations. Since high-dimensional unitary operations are very difficult to directly implement in physics experiments, methods are used to avoid high-dimensional unitary operations during the teleportation process. This paper describes how to construct a deterministic teleportation channel and a control channel using Bell state measurements only instead of high-dimensional unitary ope...     

基于移动机器人的可重构多智能体系统平台的构建

介绍了构建基于移动机器人的可重构多智能体系统实验平台的方法.在详细分析了可重构系统的主要特点的基础上,阐述了分布式人工智能领域中任务分解理论、多智能体基于对策论的协调理论,给出了构建实验平台的实现策略,包括整个可重构系统的体系结构设计、单智能体结构设计.最后,采用开放式智能体结构技术实现了系统多智能体的组织协调.