开设PSpice课程改革大学电路的教学

文章首先介绍了计算机辅助电路设计软件PSpice的功能及特点,讲述了高校在应用电子技术等专业开设PSpice课程的必要性和可行性,提出了开设PSpice课程的具体教学安排、讲授方法及注意事项,最后给出了应用PSpice对电路进行仿真的实例.     

On the Superiority of a Variable Sampling Interval Control Chart

The paper establishes the analytical grounds of the uniform superiority of a variable sampling interval (VSI) Shewhart control chart over the conventional fixed sampling interval (FSI) control chart, with respect to the zero-time performance, for a wide class of process distributions. We provide a sufficient condition on the distribution of a control chart statistic, and propose a criterion to determine the control limits and the regions in the in-control area of the VSI chart, corresponding to the different sampling intervals used by it. The condition and the criterion together ensure the uniform zero-time superiority of the VSI chart over the matched FSI chart, in detecting a process shift of any magnitude. It is shown that normal, Student's t and Laplace distributions satisfy the sufficient condition. In addition, chi-square, F and beta distributions satisfy it, provided that these are not extremely skewed. Further, it is illustrated that the superiority of the VSI feature is not trivial and cannot be assured if the sufficient condition is not satisfied or the control limits and the regions are not determined according to the proposed criterion. An application of the result to confirm the superiority of the VSI feature is demonstrated for the control chart for individual observations used to monitor a milk-pouch filling process.     

一种改进的线性容差电路的k-故障诊断

提出了一种改进的线性容差电路的k-故障诊断方法。与现有方法相比,较多地利用了已知的统计特性,缩小了电路可能的故障范围。同时,还证明了故障诊断与信号解卷积模型的相似性,将信号处理领域的方法引入线性电路故障诊断中。计算机模拟实验证实了该方法的有效性。     

借助仿真平台整体提升信号与系统课程教学质量

分析影响信号与系统课程教学质量的关键因素结果表明,将Matlab仿真平台、科研实践成果引入到课程理论与实践教学环节中可以提高教学质量。主要措施包括对数学推导繁琐、物理意义抽象的理论内容配以仿真演示课件,为实验配置硬件实验与仿真实验双环节,将科研实践成果纳入课程设计环节,在理论、实验、实践环节上克服传统教学方式的缺陷。教学实践证明,改进措施有益于信号与系统课程教学质量的提高。     

“信号处理”课程群建设的改革研究与实践

文章分析了"信号处理"课程群化后的工作任务,要求提高各门课程的相融性,正确处理理论教学和实践教学的关系,以培养适应未来发展需要的信息处理人才。     

生长素的生理功能，受体和信号传导的研究进展

本文涵盖涉及生长素有关于植物生理功能、受体和信号传导的最新国内外研究进展。生长素作为植物生长过程中必需的一种植物激素,在植物生长发育过程中单独或与其它植物激素协同作用,调节植物发育、分化、生长及应答环境变化。受体（receptor）是一种分子结构,定位在细胞表面,或者被类似激素物质包裹在细胞内部,生长素受体的特性和生长素的感应机制是在生长素发现的一个世纪以来被热切关注的课题。本文对从生长素的生理功能,受体和信号传导这几个方面进行综述分析,以期明晰其进展及存在的问题。     

基于MATLAB的信号与系统仿真分析

以计算机为辅助教学手段 ,用信号分析的软件帮助完成数值计算、信号与系统分析的可视化建模及仿真调试。     

对我国经济周期波动变化特征的实证分析

我国正处于向市场经济转轨的关键时期,经济结构发生着深刻的变化,这使得我国近 几次出现的经济波动特征也很不相同。近十几年来,我们一直使用预警信号系统等方法监测宏观经 济运行态势,在此基础上,通过对比分析我国20世纪80年代末以来发生的几次经济波动,及各主 要经济变量的动态变化,探寻我国增长率循环(growthratecycles)的产生原因。     

Social signals as design interventions for enhancing citizen science contributions*

Despite the scientific potential and increasing popularity of web-based citizen science, low contribution from volunteers is often a major hurdle. Studies have shown that individual behavior could be altered through targeted design interventions, but little is known about the specific factors that modulate volunteers’ contributions. A particularly elusive question entails the role of social feedback, in the form of targeted notifications about the contribution of other volunteers. Based on social comparison theory, we hypothesized that (1) volunteers increase contribution when presented with information about a high-performing peer or group, and (2) volunteers conform more strongly to a group rather than to a single peer. To test whether volunteers’ contributions change due to the exposure to the contribution of a peer or group norm, we systematically varied the information presented to participants in an environmental monitoring citizen science project. Volunteers increased their contributions when they were presented with the contribution of a high-performing peer and norm, but they were not influenced by a low-performing peer or norm. Further, we found that volunteers were more likely to match the contributions of a group than that of a peer. However, when volunteers were simultaneously exposed to information about a peer and a group, the effect depended on the respective performance of the peer and group. A theoretical model was developed to explain volunteers’ response and dissect the specific role of social comparison. Our findings offer the possibility of increasing volunteers’ contributions through design interventions.     

社会规范的形成与运作——以合作为视角

秩序的萌发、形成与维系并非完全以法律为依托,对其理解应摆脱法律中心主义的观念。社会规范在前政府时代社会秩序维持中起着重要的作用。博弈论和信号传递理论为理解社会规范的出现和运作提供了一个更加清晰的视角,同时也为社会规范的弱点及法律的功能提供了一个较为有力的解说。