大学生产品卷入度对冲动性网络购物的影响

本研究采用问卷法对224名大学生施测,探究产品卷入度与冲动性购买倾向对大学生群体网络冲动性购买行为的影响及作用方式。结果显示,冲动性购买倾向与网络冲动性购买行为总体正相关,二者关系受到产品卷入度水平及其认知成分的调节作用,当产品卷入度或其认知成分水平较低时,高冲动性购买倾向的被试比低冲动性购买倾向被试更容易发生网络冲动性购买行为,而当产品卷入度或其认知成分水平较高时,冲动性购买倾向对网络冲动性购买行为的影响趋于消失。     

浅谈污水处理厂在线仪表的日常管理和维护

随着我国科学技术的不断发展和污水处理工艺要求的不断提升,大量在线仪表的广泛应用和普及推动了当下污水处理过程中的自动化控制水平.本文主要结合工作实践对污水处理厂在线仪表的日常管理和维护进行简单分析和总结.     

DS7400Xi可编程输出口应用

DS7400Xi大型报警主机系统具有很强的实用性,被广泛应用在小区住户及周界报警系统、大楼安保系统、以及工厂、学校、仓储等各类大型安保系统,其可编程输出口功能较多,使用者难于掌握。文中就可编程输出口的防区报警、系统复位、出入口控制三种常用功能进行详细介绍,从使用范围、系统结构接线图设计、编程设置及效果等方面进行了总结归纳。     

A Study of Online Portal Users’ Loyalty From Core Service,Additional Value-added Service and Switching Barriers Perspectives

This study proposes a research model elucidating the effects of core service satisfaction, additional value-added service satisfaction, and switching barriers as determinants of portal loyalty and tests the model using empirical data collected from game portal users. The results suggest that different service satisfaction and switching barriers are strong antecedents of p-loyalty; the moderating effect of switching barriers on the relationship between satisfactions and p-loyalty is contingent on the portal users’ usage patterns.     

以网络百科为平台发展学生在物理化学课程学习中的批判性思维

文章探索了一种大学生批判性思维的培养模式。讨论了批判性思维的重要意义、介绍了利用网络百科实施课堂教学的方法和步骤、对反馈结果进行分析。实践结果表明教学效果良好。     

Assessment of gradient-based iterative learning controllers using a multivariable test facility with varying interaction

A multiple input, multiple output (MIMO) experimental test facility has been developed for the evaluation, benchmarking and comparison of iterative learning control (ILC) strategies. The system addresses the distinct lack of experimental studies for the multivariable case and enables controller performance and robustness to be rigorously investigated over a broad range of operating conditions. The electromechanical facility is multi-configurable with up to 3 inputs and permits both exogenous disturbance injection and a variable level of coupling to be applied between input and output pairs. To confirm its suitability for evaluation and comparison of ILC, theoretical results are derived for two popular forms of gradient-type ILC algorithm, linking interaction with fundamental performance limitations. The test facility is then used to establish how well theoretical predictions match experimental results. The analysis is then extended to provide solutions to address this performance degradation, and these are again confirmed using the test facility.     

Energy-saving self-configuring networked data centers

In this paper, we develop the optimal minimum-energy scheduler for the dynamic online joint allocation of the task sizes, computing rates, communication rates and communication powers in virtualized Networked Data Centers (NetDCs) that operates under hard per-job delay-constraints. The referred NetDC’s infrastructure is composed by multiple frequency-scalable Virtual Machines (VMs), that are interconnected by a bandwidth and power-limited switched Local Area Network (LAN). Due to the nonlinear power-vs.-communication rate relationship, the resulting Computing-Communication Optimization Problem (CCOP) is inherently nonconvex. In order to analytically compute the exact solution of the CCOP, we develop a solving approach that relies on the following two main steps: (i) we prove that the CCOP retains a loosely coupled structure, that allows us to perform the lossless decomposition of the CCOP into the cascade of two simpler sub-problems; and, (ii) we prove that the coupling between the aforementioned sub-problems is provided by a (scalar) constraint, that is linear in the offered workload. The resulting optimal scheduler is amenable of scalable and distributed online implementation and its analytical characterization is in closed-form. After numerically testing its actual performance under randomly time-varying synthetically generated and real-world measured workload traces, we compare the obtained performance with the corresponding ones of some state-of-the-art static and sequential schedulers.     

Who am I? Representing the self offline and in different online contexts

The present paper examines the extent to which self-presentation may be affected by the context in which is it undertaken. Individuals were asked to complete the Twenty Statements Test both privately and publicly, but were given an opportunity to withhold any of their personal information before it was made public. Four contexts were examined: an offline context (face-to-face), an un-contextualized general online context, or two specific online contexts (dating or job-seeking). The results suggested that participants were willing to disclose substantially less personal information online than offline. Moreover, disclosure decreased as the online context became more specific, and those in the job-seeking context disclosed the least amount of information. Surprisingly, individual differences in personality did not predict disclosure behavior. Instead, the results are set in the context of audience visibility and social norms, and implications for self-presentation in digital contexts are discussed.     

在线手绘投影线图的端点融合

针对现有3D手绘投影图端点融合方法的不足，提出通过变系数容差带进行端点融合的方法．首先利用容差半径计算变系数容差带，通过将二次曲线求交转化为直线段与二次曲线求交确定节点；然后按线元为棱线还是转向轮廓线，依据聚类点类型和融合规则分别给出其端点融合方法；最后结合完整线图和3D重建技术进行端点规整．通过算例对文中方法予以验证并与现有方法进行比较．实验结果证明该方法能得到满意的3D手绘投影图规整效果．     

适应网络教育自动组卷算法的研究

针对网络教育开放性、自主性的特点,本文提出了适应于网络教育的以知识点为核心的自动组卷算法.在分析试题库层次结构和数据表属性设置的基础上,该算法把题型平均难度系数、题型个数作为主要控制目标,以包含题目题型作为主要条件筛选知识点,以此选择试题,而后对题目按知识点的各难度等级分类,从而按知识点选题组卷,并运用适当的组卷策略优化组卷结果.实验表明,该算法依据不同的组卷策略自动生成的试卷,组卷效率、成功率和知识点覆盖率均比较理想.