Cortex—MO＋的RFID读卡器模块设计

本文设计一种基于NXP公司的LPC812微控制器和SLRC610射频芯片的RFID模块方法。该模块采用内置天线,预留串口与外部通信。该模块性能优良、易于集成到RFID系统中,使用户更专注于系统功能方面的设计。     

基于信令分析的伪基站侦测与追踪系统

伪基站是通过仿真移动通信无线基站,采用大功率的无线信号发射器,强迫用户手机在仿真基站上进行登记,并强行推送商业广告短信,甚至诈骗短信,给手机用户带来骚扰和损失.“伪基站侦测与追踪系统”是对海量信令数据进行深入挖掘,并且结合无线覆盖模型、GIS等技术实现对伪基站跟踪、定位的系统.     

一种通过USB接口的可靠固件升级技术

本文提出一种可靠固件升级的技术。该技术采用外部主晶振,工作异常时自动切换到校准后的内部晶振,还使用了DFU检测序列、看门狗等方法。相对于传统的固件升级技术,该技术具有抗干扰能力强、可靠、易于使用等优点。     

Accommodation and convergence in integral imaging 3D display

In this paper, we analyze the visual fatigue of integral imaging three‐dimensional (3D) display by studying the accommodation and convergence when viewing the integral imaging 3D images. The theoretical analyses show that there is no inconsistency between the accommodation and convergence distances, which means that the integral imaging 3D display has no visual fatigue. Experiments are implemented, and the results finally demonstrate the rationality of the theoretical analyses. These analyses can be quite beneficial for researchers to better understand the performances and promote the practical applications of the integral imaging 3D display.     

Visual experience for autostereoscopic 3D projection display

In order to investigate visual experience for watching the autostereoscopic three‐dimensional (3D) projection display, we conduct a subjective evaluation experiment by a questionnaire when viewing video clips. Factor analysis is adopted to classify the evaluation items for the perpetual constructs of visual experience. Then a mixed design with repeated measurement analysis of variance with dimension and display duration as factors is carried out on the evaluation data to check the factorial effects and interactions for statistical significance. The results of factor analysis extract five factors including visual comfort, image quality, distortion, naturalness, and presence, which can be used as comprehensive indicators to evaluate the autostereoscopic 3D projection display. The results of analysis of variance indicate that image quality, which is used to assess two‐dimensional contents, is no longer applicable. It is necessary to give consideration to depth when evaluating 3D visual experience. Although 3D scenes enhance the overall subjective performance such as naturalness and presence, the health issues and stereoscopic distortion related to the introduction of depth cannot be ignored.     

GCr15轴承钢连铸过程中热物性参数的研究

借鉴前人实验数据,采用一定的数学方法,对轴承钢的热物性参数进行了研究.结果表明：GCr15轴承钢的液相线温度为1 465.7℃,固相线温度为1 328.4℃,零强度温度为1 380℃左右,零塑性温度为1 330℃左右;在固相区、液固两相区、液相区分别采用不同的公式进行处理,可使结果更加准确,还避免了奇异性.研究结果可为轴承钢连铸工艺有限元模拟提供基础.     

Oil monitoring methods based on information theory

To evaluate the wear condition of machines accurately,oil spectrographic entropy,mutual information and ICA analysis methods based on information theory are presented. A full-scale diagnosis utilizing all channels of spectrographic analysis can be obtained. By measuring the complexity and correlativity,the characteristics of wear condition of machines can be shown clearly. The diagnostic quality is improved. The analysis processes of these monitoring methods are given through the explanation of examples. The availability of these methods is validated and further research fields are demonstrated.     

大学英语读写课堂教师提问的逻辑性调查分析

教师提问、学生回答是语言课堂中的一个逻辑过程。教师的提的问题和课堂模式具有逻辑艺术,与学生产生思维共振,教与学才能统一。通过对大学英语读、写、译课堂观摩调查结果的分析,提出重视课堂提问的逻辑性,让学习者开动脑筋把注意力从学什么转移到怎样学和怎样思考的问题上,从而提高语言学习者的学习能力、理解能力和表达能力。     

环签名在电子签章系统中的应用研究

随着电子商务活动和电子政务活动的飞速发展,电子签章开始广泛地应用到各个领域中.电子签章实质上就是一种数学签名运算.传统的电子签章系统采用“一人一章”的签名体制,实现签署人的身份认证,使得签名效率无法得到提升,同时存在滥用职权的隐患.在研究传统电子签章设计原则和关键技术的基础上,重点分析其存在的安全缺陷,提出基于环签名技术设计安全可靠的电子签章方案,并讨论其安全性.     

基于认知负荷理论的多媒体课件设计研究

多媒体课件的信息加工主要包括信息的选择、组织和整合策略,它直接影响学习者对学习内容的选择、组织和整合。目前高校的多媒体课件比较注重体现多媒体技术形象直观、信息量大、效率高等特点,却往往忽视过量信息加工和学习者认知资源有限之间的矛盾。依据认知负荷理论,合理设计多媒体课件中文字、图片、声音、动画和视频等的呈现方式,可以降低认知负荷,最大限度提高学习者的信息加工水平,以达到提高教学效果的目的,同时对指导当前多媒体辅助教学实践也有重大意义。