巧用绘图命令快速绘图

AutoCAD应用软件绘图具有速度快、精度高、易修改的特点，已经基本取代了手工绘图，熟练掌握、使用绘图软件可以提高绘图的效率和质量。本文讲述了使用绘图命令和绘图工具时的一些技巧，这些技巧可以帮助工程技术人员快速、准确的完成较难图形的绘制以及一些必要的工程标注。     

巧用绘图命令快速绘图

AutoCAD应用软件绘图具有速度快、精度高、易修改的特点,已经基本取代了手工绘图,熟练掌握、使用绘图软件可以提高绘图的效率和质量。本文讲述了使用绘图命令和绘图工具时的一些技巧,这些技巧可以帮助工程技术人员快速、准确的完成较难图形的绘制以及一些必要的工程标注。     

考虑网络流量的最优路径求解模型和算法

本文旨在解决交通网络中群体车辆的路径选择问题．即为每个车辆寻求最优行驶路径．使之在起迄点间的旅行时间最短．考虑到网络流量对路段旅行时间的影响，先进行流量分配，再同时为各个车辆寻求最短路径．为此，首先给出了考虑流量影响的网络模型，然后建立了基于路段的用于流量分配的变分不等式模型．该模型的解给出了车辆按照最优路径行驶时分配到各路段上的车辆数目．由于该模型是完全基于路段的，从而克服了基于路径方法必须进行路径穷举的缺陷．最后给出了最优路径选择算法，并证明了算法的正确性．本文给出的模型和算法适用于交通畅通、交通拥挤等各种情况．实验结果表明本文提出的模型和算法是非常有效的．     

协同理念下建筑企业集团管控模式的选择研究

近年来我国经济发展迅速,改革开放后建立的一批企业纷纷发展壮大,出现了大量的建筑集团化企业,这些集团化企业规模较大,涉及较多的子分公司和业务领域,进而为集团化企业整体的有效管理造成了一定影响。现阶段关于集团化企业管控模式的研究很多,但是对于管控水平的提升并不明显。这就要求对于集团化企业模式研究,应当充分结合企业实际情况和行业发展状况,只有这样确定的模式才能够符合管控实际需求。     

O2O垃圾分类的用户体验中口碑传播的影响机制研究

本文采用S-0-R模型,基于O2O模式下的生活垃圾分类调查对象的反馈结果,对用户体验与口碑传播的影响机制进行统计分析。由最终分析成果可以得出,当将消费选择作为中介变量时,垃圾分类中的用户体验对口碑传播有显著的正向影响,同时为了助力于实现垃圾的减量化和资源化,文章提出了在垃圾源头分类中用户的选择体验和社会体验提升在系统中的重要性,提升垃圾围城和资源浪费问题的解决效率。     

Estimating the Value of Life,Injury, and Travel Time Saved Using a Stated Preference Framework

The incidence of fatality over the period 2010–2014 from automobile accidents in North Cyprus is 2.75 times greater than the average for the EU. With the prospect of North Cyprus entering the EU, many investments will need to be undertaken to improve road safety in order to reach EU benchmarks. The objective of this study is to provide local estimates of the value of a statistical life and injury along with the value of time savings. These are among the parameter values needed for the evaluation of the change in the expected incidence of automotive accidents and time savings brought about by such projects.In this study we conducted a stated choice experiment to identify the preferences and tradeoffs of automobile drivers in North Cyprus for improved travel times, travel costs, and safety. The choice of route was examined using mixed logit models to obtain the marginal utilities associated with each attribute of the routes that consumers choose. These estimates were used to assess the individuals’ willingness to pay (WTP) to avoid fatalities and injuries and to save travel time. We then used the results to obtain community-wide estimates of the value of a statistical life (VSL) saved, the value of injury (VI) prevented, and the value per hour of travel time saved. The estimates for the VSL range from €315,293 to €1,117,856 and the estimates of VI from € 5,603 to € 28,186. These values are consistent, after adjusting for differences in incomes, with the median results of similar studies done for EU countries.     

认知风格与感觉通道对选择盲的影响

目的选择盲的概念是在变化盲的基础上提出的,指在简单的决定任务中不能觉察到选择意向和选择结果之间不匹配的现象。方法从被试间变量认知风格(场独立型vs场依存型)和被试内变量感觉通道(视觉vs听觉)两方面着手,采用混合设计探究两者对选择盲的影响。结果实验结果表明,认知风格对选择盲的影响不显著,但感觉通道对选择盲的发生存在显著影响,并且听觉条件下显著比视觉条件更容易发生选择盲,两者之间的交互作用不显著。结论感觉通道是造成选择盲的重要原因。     

Enjoyment fosters media use frequency and determines its relational outcomes: Toward a synthesis of uses and gratifications theory and media multiplexity theory

Previous work has begun to incorporate psychological constructs into our understanding of media multiplexity (i.e., use of multiple media in a single interpersonal relationship). Following this approach, this investigation examined how a user's enjoyment of a communication medium might both predict medium use frequency and alter the extent to which closeness is an outcome of such use. Results supported this model across six popular interpersonal communication media (voice telephone, text messaging, e-mail, instant messaging, video chat, and social networking sites) in relationships with extended family members. Specifically, at low levels of medium enjoyment, use of a medium was not associated with relational closeness. Practically, these results suggest that communicating via an unsatisfying medium may not foster relational closeness; theoretically, these results argue for including psychological processes to strengthen MMT as a theory of interpersonal media choice.     

How do construal levels affect the intertemporal choices of Internet addicts?

Although various studies have shown that construal levels affect intertemporal choices, how this specifically occurs in individuals with Internet addiction remains unknown. We aimed to examine how do construal levels affect the intertemporal choices of Internet addicts. This study employed a 2 × 2 experimental design to explore this issue in greater depth, with 55 Internet addicts and 55 healthy controls that were well matched in age and gender. Each participant experienced one of two construal level priming conditions (high versus low) before completing an intertemporal decision-making task. The results of the experiment revealed that construal level had an effect on the intertemporal choices of Internet addicts as well as healthy controls. However, the subjective values of the intertemporal choices of participants with Internet addiction were significantly lower. Additionally, the subjective values of intertemporal choices were significantly higher among participants who had been primed to have a high construal (i.e., more abstract) mindset as opposed to a low construal (i.e., more concrete) one. This result further affirmed the influence of construal level on intertemporal choice, regardless of whether individuals were addicted to the Internet. Although Internet addicts discounted delayed gains more steeply than did normal Internet users, both exhibited shortsightedness in the low construal level priming condition. These results suggest that Internet addicts as well as normal users are more long-sighted in high construal level priming condition. Implications of the current findings for long-term benefit planning or goal setting and the development of effective interventions are discussed.     

基于随机选择的返回式动态树形反碰撞算法

基于随机选择的返回式动态树形反碰撞算法在解决射频识别系统中碰撞问题时,通过随机选择碰撞位来影响返回式动态树的分支,让尽可能多的只有一位碰撞的一对标签被同时识别,从而提高识别效率,同时通过减少阅读器检测标签时发送给标签的参数,来提高信道利用率。基于该算法的标签设计逻辑简单,为射频识别技术的推广起到了推动作用。