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Based on a lot of experiment results, a conclusion is drawn: comparing with other factors, the performance of branch handling strategy is the key limits of processor to exploit the instruction level parallelism existed in nonscientific code, cache miss have severe effect on superscalar processor's performance when it runs scientific code. Second, in order to reduce the branch penalty and improve the performance of superscalar processor, a new branch handling strategy—a classification based hierarchical branch handling strategy, CHBHS is proposed. It first expands the traditional processor architecture to support multiple condition code, conditional execution and Mbranch instruction, as a result, compiler can reduce the number of static conditional branch when the code is generated. Then, CHBHS tries to use the best suitable mechanism to deal with different branch base on their different behavior. CHBHS can predict the target address of unconditional branch, subroutine call and conditional branch by buffering their target address in branch target buffer, a newly proposed high efficient return address stack is used to reduce the penalty of subroutine return instruction, a new Counter Register Stack is also proposed to reduce the penalty of loop-closing branch to zero, and dynamic branch predictor is incorporate with branch target buffer to predict the outcome of conditional branch.
基于上述结论,为了尽量消除转移指令对处理器开发指令级并行性能力的影响,进一步提高处理器性能,在详尽分析目前已存在的转移处理策略的特点与局限性的基础上,首次提出了一种新的转移处理策略即基于分类的层次转移处理策略CHBHS(Classification Based Hierarchical Branch Handling Strategy),它首先通过扩展传统的体系结构,支持多条件码、条件式执行及多分支转移技术,以使编译程序在进行代码生成时可尽量少生成条件转移指令,从而减少静态条件转移指令的数目;其次,基于不同的转移指令的行为不同这一事实,提出了对不同的转移指令采用不同的机制进行处理的思想,即对无条件转移指令和函数调用指令以及条件转移指令的目标地址,采用转移目标缓冲器来预测,对于函数返回指令,采用所提出一种的高效返回地址栈来预测其目标地址,对于大多数循环控制转移指令,采用所提出的Counter Register Stack来将其所可能带来的损失减少为0,对于其他的条件转移指令采用动态预测机制来预测其方向。
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ABSTRACT The main contents and key techniques about remote diagnostic techniques based on Internet/Intranet and IRDS (Internet-based Remote Diagnostics System), are researched systematically in this dissertation through theoretical study and engineering practice.
本论文通过理论研究和工程实践,对新兴的基于Internet/Intranet的远程诊断系统IRDS(Internet-based Remote Diagnostics System)的主要研究内容和关键技术进行了深入系统的研究,研制了远程信号分析系统,建立了较完善的IRDS示范体系。
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Based on careful analysis to the users' requirements of real-time interactive multi-view video service, this paper tackles several key practical technologies. To provide flexibility to special video snapshot decoding, the images from different views are predictively re-encoded based on the view correlation. Both the unicast and IP multicast techniques are employed in our system to provide interactive video service based on different system requirements.
然后本文根据系统开发的关键问题,对关键技术进行了深入研究,系统采用了transcoding实时编码技术以解决特效视频快照的解码效率问题;提出了分别基于单播和IP组播技术的系统交互策略,用以在不同应用环境下为用户提供可交互的多视角视频服务;提出了特效视频的automatic组播策略和on-demand组播策略,以达到高度可交互性与合理带宽占用的平衡。
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In this paper, a prototype T-CBESD (Tool for Component-Based Embedded Software Designs) has been designed, which is based on the theory of interface automata and is implemented as a plug-in module on the open-source platform Eclipse.
本文在Eclipse平台上设计并实现了一个基于接口自动机模型的构件化嵌入式软件设计的形式化验证原型工具T-CBESD (Tool for Component-Based Embedded Software Designs)。
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In this paper,we propose an SoC hardware platform based on AMBA bus,and construct a software platform based on μClinux operating system.
在进行SoC设计时,可以用基于模块(block-based)或基于平台(platform-based)的方法[1]。
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This research is to find out the effects of light level, visual angle and eccentricity on the spectral sensitivity of human eyes at mesopic region; to validate the possibility of working out the spectral luminous efficacy curves based on visual performance at mesopic light levels; to find the connection between the results of performance-based method and brightness-matching method.
本论文主要研究照明水平、目标大小和目标偏心度等因素对中间视觉状态下视觉功能的光谱响应特性的影响;探讨在视觉功能的基础上获得人眼光谱光视效率的可能性以及基于视觉功能法(Performance-based Method)和传统的视亮度匹配法(Brightness-matching method)之间所存在的联系。
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In this study, with a total of 798 SOC density data and the 1:500 000 soil maps, the SOC storage in YunnanGuizhouGuangxi Region of China (including Yunnan province, Guizhou province and Guangxi Zhuang Autonomous Region) was estimated using the soil type method with the linkage of arithmetic mean method, median method, and areaweighted mean method (based on the area recorded in the Soil Series) based on different map units and the results were compared with that of the linkage of PKB method (Pedological Professional Knowledge Based Method).
利用中国滇黔桂地区(云南省、贵州省和广西壮族自治区)798个土壤剖面及1∶[KG-*2]50万土壤图在不同的制图单元水平上,分别采用算术平均值法、中值法和面积加权平均值法(以土种志中的面积为权重)估算了该地区1 m深度SOC储量,并与基于土壤学专业知识连接方法(Pedological Knowledge Based Method, PKB)的估算结果进行了比较。
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In this study, with a total of 798 SOC density data and the 1:500 000 soil maps, the SOC storage in Yunnan-Guizhou-Guangxi Region of China (including Yunnan province, Guizhou province and Guangxi Zhuang Autonomous Region) was estimated using the soil type method with the soil type method with the linkage of arithmetic mean method, median method, and area-weighted mean method (based on the area recorded in the Soil Series) based on different map units and the results were compared with that of the linkage of PKB method (Pedological Professional Knowledge Based Method).
利用中国滇黔桂地区(云南省、贵州省和广西壮族自治区)798个土壤剖面及1:50万土壤图在不同的制图单元水平上,分别采用算术平均值法、中值法和面积加权平均值法(以土种志中的面积为权重)估算了该地区1 m深度SOC储量,并与基于土壤学专业知识连接方法(Pedological Knowledge Based Method,PKB)的估算结果进行了比较。
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So its important for network managers to develop system to monitor network traffic, attacks and resources. It will help network managers to manage network more effectively.The article analyzes two normal approaches to realize network monitor, one is based on packets captured and another is based on logs generated by network gateway. Then, it introduces the three common kinds of log format, syslog, traffic log and WELF.
本文首先分析了网络监视系统实现的常用技术,基于包捕获的技术和基于网关设备日志分析的技术,接着详细分析了三种通用的网络设备日志——Syslog格式日志、Traffic Log格式日志与WELF格式日志,在此基础上详细介绍了本文的重点,基于网关日志分析的网络监视系统一LNMS (Log-based Network Monitor System)的设计和实现。
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According to the calibration information, Research and development status of automotive bus network and automotive calibration system is studied and the research significance is generalized. First of all, the collectivity precept for calibration system is designed, the calibration platform is set up based on the XCP Protocol and the calibration object is CAN bus network simulation ECUs. Then how to create the calibration system based on Ethernet and Series communication is expatiated, the communication way from computer to ECUs is introduced and the calibration system is tested. Then how to create the calibration system based on CAN bus communication is expatiated, the design and the interface programme are introduced and the calibration system is tested. At last the platform is used to calibrate the CAN bus network simulation system to regulate the simulation system's topology and communication speed to test the communication protocol's feasibility.
论文首先设计了标定系统的总体方案,以CAN总线实时仿真系统中的节点标定为研究对象,采用XCP协议建立具有串口、以太网和CAN总线三种通讯接口的标定平台;然后,具体开发了基于以太网通讯和基于串口通讯的标定系统,完成了上、下位机部分的软件设计,确定了标定系统在两种通讯方式下的数据处理方法,并分别应用两种标定方式标定下位机仿真系统的参数,让下位机仿真系统在规定的通讯协议和拓扑结构下进行仿真,对所设计的标定系统进行了调试;接着,设计了基于CAN总线通讯的标定系统,完成了CCP协议(&XCP on CAN&)的接口程序设计,并通过混合动力汽车一种拓扑结构的通讯仿真对所设计的系统进行了调试;最后,应用开发的标定系统,对混合动力电动汽车网络通讯协议进行了仿真研究,并根据实验结果进行了分析。
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- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。