基于指令相对吞吐率的虚拟机检测方法

对于常见的虚拟机检测方法仅适用于特定配置的虚拟机的不足,设计并实现一种基于特权指令与非特权指令的相对吞吐率变化的检测虚拟机的方法,检测过程采用查询-验证的方式。该方法可以成功地分辨出物理机环境与虚拟机环境的不同,并且事先只需了解较少的待检测目标的配置信息,对不同硬件配置的依赖性较小。     

Enhancing graph production skills via programmed instruction: An experimental analysis of the effect of guided-practice on data-based graph production

A computer-based graphing simulator used tutorial modules to teach 61 undergraduate college students how to create cumulative graphs from sets of data. One group was required to complete the steps of constructing an appropriate graph within a computer-provided graphical workspace, while the other group did not have graphic construction requirements during the tutorial, but could optionally construct the graph within the workspace. Following the tutorial instruction, each student was given three blank sheets of graph paper, a pencil, two sets of data, and the requirement of physically constructing graphs based on the given data. Students who were required to actively complete graph construction steps during their tutorial subsequently produced graphs from the new data that were significantly better than those students who had the option of practicing in the workspace. Results suggest that the presence of response contingencies within the graphical workspace increases subsequent graph construction performance. The efficiencies possible with electronic instruction are discussed.     

基于可疑行为识别的PE病毒检测方法

针对当前PE病毒难以防范及查杀的现象,对PE病毒关键技术进行分析,提取病毒典型特征的可疑行为,在此基础上提出一种Windows平台下的静态检测方法。该方法在对程序反编译处理的基础上,以指令序列与控制流图的分析为行为识别依据,完成基于可疑行为识别的病毒检测方法的设计。实验结果证明,该检测方法能有效检测混淆变换病毒。     

一种基于GPU的高精度体系结构级功耗模型

随着硬件功能的不断丰富和软件开发环境的逐渐成熟,GPU开始被应用于通用计算领域,协助CPU加速程序运行。为了追求高性能,GPU往往包含成百上千个核心运算单元,高密度的计算资源使得其性能远高于CPU的同时功耗也高于CPU,功耗问题已经成为制约GPU发展的重要问题之一。在深入研究Fermi GPU架构的基础上,提出一种高精度的体系结构级功耗模型,该模型首先计算不同native指令及每次访问存储器消耗的功耗;然后根据应用在硬件上的执行指令和采样工具获得采样结果,分析预测其功耗;最后通过13个基准测试应用对实际测试与功耗模型测试结果进行对比分析,该模型的预测精度可达90%左右。     

管制指令语音识别在模拟飞行界面的实现

将语音识别技术应用到管制学员的培训中是提高管制模拟机应用效率的重要途径.在深入分析中文管制指令特征的基础上,从语音识别基础技术出发,设计一套适合于中英文管制指令语音特点的语音识别技术,利用MATLAB完成相应程序的编写和模拟飞行界面的设计.通过形成独特的管制指令语音识别模板库,最终在模拟飞行界面实现管制语音指令对航空器飞行的控制.从而为进一步实现自动化模拟机机长席位提供可能,最终完全替代人工机长席位.     

Cooperative group optimization with ants (CGO-AS): Leverage optimization with mixed individual and social learning

We present CGO-AS, a generalized ant system (AS) implemented in the framework of cooperative group optimization (CGO), to show the leveraged optimization with a mixed individual and social learning. Ant colony is a simple yet efficient natural system for understanding the effects of primary intelligence on optimization. However, existing AS algorithms are mostly focusing on their capability of using social heuristic cues while ignoring their individual learning. CGO can integrate the advantages of a cooperative group and a low-level algorithm portfolio design, and the agents of CGO can explore both individual and social search. In CGO-AS, each ant (agent) is added with an individual memory, and is implemented with a novel search strategy to use individual and social cues in a controlled proportion. The presented CGO-AS is therefore especially useful in exposing the power of the mixed individual and social learning for improving optimization. The optimization performance is tested with instances of the traveling salesman problem (TSP). The results prove that a cooperative ant group using both individual and social learning obtains a better performance than the systems solely using either individual or social learning. The best performance is achieved under the condition when agents use individual memory as their primary information source, and simultaneously use social memory as their searching guidance. In comparison with existing AS systems, CGO-AS retains a faster learning speed toward those higher-quality solutions, especially in the later learning cycles. The leverage in optimization by CGO-AS is highly possible due to its inherent feature of adaptively maintaining the population diversity in the individual memory of agents, and of accelerating the learning process with accumulated knowledge in the social memory.     

基于GSM的远程车载防盗报警系统设计

提出了一种基于SIM300的车载无线防盗报警装置。该方案主要由单片机和SIM300模块两部分组成,借助成熟的GSM移动网络,以直观的中文短消息或电话形式进行无线控制,将控制与监测实现了智能化、便捷化及远程化。     

基于SMS远程监控系统

SMS远程监控系统利用GSM网络的SMS(手机短信业务)和低成本的硬件电路构建家居设备的远程监控。在GSM覆盖的地域里,用户可以发送短消息来控制连接到系统的家电设备的开关状态。同样,系统也可以向用户告知其工作状态。用户可以设定特殊短信来监视家中是否发生了特定事件。将GSM/GPRS MODEM主控系统与无线模块相结合,系统构建了一个一主多从的控制网络,从而实现智能化家居监控网络。     

一种适合窄带网络多媒体教学的文件传输协议──NFTP的研究与实现

目前在网络环境下进行多媒体教学,网络速度是一个严重的瓶颈问题。在分析瓶颈产生的基础上,作者提出了一个新的文件传输协议──ＮＦＴＰ（Ｎａｒｒｏｗｂａｎｄ　Ｆｉｌｅ　Ｔｒａｎｓｆｅｒ　Ｐｒｏｔｏｃｏｌ窄带文件传输协议）,利用广播数据包方法解决多媒体教学中的速度问题,并设计了一组协议原语,用于协议的描述。     

计算机辅助阅读英语的专家系统初探

把学生阅读英语作为一种解决问题的活动,把英语教师看作是英语领域的专家,初步构想了一个阅读英语的专家系统,为计算机辅助英语教学提供了一种新思路。