图书出版流程、知识螺旋与员工创新行为的影响研究——基于国内少儿出版社转企改制的实证调查

立足近两年中国出版行业转企改制后的现状,以图书出版流程四维度为解释变量,知识螺旋为中介变量,构建了影响员工创新行为的结构方程模型,基于中国56家少儿出版社279份问卷调查的样本数据进行实证分析。研究发现:首先,图书流程中的选题策划、技术选择和营销服务分别显著影响员工创新行为,编校质量对员工创新行为的影响作用不显著;其次,选题策划、编校质量和技术选择分别显著影响知识螺旋,营销服务对知识螺旋的影响作用不显著;最后,知识螺旋在选题策划与员工创新行为间具有部分中介效应,知识螺旋在技术选择与员工创新行为间具有部分中介效应,知识螺旋在编校质量与员工创新行为间具有完全中介效应,知识螺旋在营销服务与员工创新行为间的中介效应不显著。     

Social media and political discussion: when online presence silences offline conversation

ABSTRACT

This paper explores the relationship between the use of social media, attitudinal strength, perceived opinion agreement with social ties, and willingness to discuss a political issue in different online and offline contexts. Unlike the anonymous environment of some Internet forums, social media are closely tied to the relationships and activities of everyday life. Social media increasingly make ties from offline contexts persistent online, and, because of the ambient nature of these technologies, awareness of the opinions, interests, and activities of social ties has become pervasive. As such, the use of social media is likely to affect everyday conversation about political issues in on- and offline contexts, including the home, workplace, social gatherings with friends, community meetings, and on social network sites (SNSs). Based on a national probability survey, we find that the use of SNSs (i.e., Facebook and Twitter) has a direct, negative relationship to deliberation in many offline settings. Some uses of these platforms are associated with having a lower, perceived opinion agreement with social ties. As part of a spiral of silence, this further reduces the willingness of social media users to join political conversations in some offline settings. Only those with the strongest attitudes on an issue are immune.     

对判断螺卷形切屑折断的研究

本文以螺卷屑为研究对象,对其折断过程进行了分析,理论推导出螺卷屑的折断判据。并通过单因素实验,正交组合实验验证了这个判据的可靠性。从理论上证明了对螺卷形折断的判据可适用于 C 形屑,不断长螺卷屑。     

Threshold-range scaling of excitable cellular automata

Each cell of a two-dimensional lattice is painted one of colors, arranged in a color wheel. The colors advance (k tok+1 mod ) either automatically or by contact with at least a threshold number of successor colors in a prescribed local neighborhood. Discrete-time parallel systems of this sort in which color 0 updates by contact and the rest update automatically are called Greenberg-Hastings (GH) rules. A system in which all colors update by contact is called a cyclic cellular automation (CCA). Started from appropriate initial conditions, these models generate periodic traveling waves. Started from random configurations the same rules exhibit complex self-organization, typically characterized by nucleation of locally periodic ram's horns or spirals. Corresponding random processes give rise to a variety of forest fire equilibria that display large-scale stochastic wave fronts. This paper describes a framework, theoretically based, but relying on extensive interactive computer graphics experimentation, for investigation of the complex dynamics shared by excitable media in a broad spectrum of scientific contexts. By focusing on simple mathematical prototypes we hope to obtain a better understanding of the basic organizational principles underlying spatially distributed oscillating systems.     

网络传播中的“反沉默螺旋”现象研究

在网络时代，“沉默螺旋”理论明显地表现出局限性，网络传播出现一种新的态势，即“反沉默螺旋”现象。通过观察“反沉默螺旋”现象在现实中的诸多案例，得出了其出现一种模式和两种路径:即理性和非理性途径，这主要是由于网络的匿名性、网络的交互性、中坚分子等原因造成的。     

乳化炸药装药机螺旋叶片基于UG参数化设计研究

通过构建叶片数学模型,在UG平台上完成乳化炸药装药机螺旋叶片参数化设计,给出构造叶片模板、创建UG参数化设计界面及UG二次开发设计步骤,并基于UG/OPEN API,采用C/C＋＋语言开发出参数化设计系统,编制应用程序,为后续螺旋叶片的三维制造提供了便捷的设计模型。     

对互联网条件下流言传播动力机制的实证研究

运用控制实验和观察的实证方法检验网络条件下流言传播的群体动力效应,表明网络流言传播在一定的群体压力的作用下,会出现明显的群体极化和＂沉默的螺旋＂效应,这不仅会使流言在强度和广度上扩大,而且证实了网络流言与人际传播一样,其传播也受到群体效应的影响。在对实验和观察结果的总结和分析基础上,提出了网络流言传播的群体动力模式。     

微型动静压轴承FLUENT仿真研究

采用动静压轴承的工作特点,分析和建立了微型动静压轴承工作时油膜数学模型。通过计算流体力学软件Fluent对螺旋油腔在低黏度介质中的仿真研究,得到出口截面的温度数据,并且分析了该轴承在静态和动态时的温度场和压力场分布情况。     

技术创新、制度创新和产业系统的协同演化机理及实证研究

技术创新、制度创新是产业系统演进的基础,产业系统演进为技术创新和制度创新提供条件,三者呈现螺旋协同演化趋势。从协同演化视角,在分析三者协同演进机理的基础上,构建复合系统协同度模型,选取福建省软件业为例研究技术创新、制度创新和产业系统发展的协同度,证实了三者之间的螺旋演化关系。     

单头螺旋槽管凝结换热实验研究

本文对垂直布置的单头螺旋槽管在凝结条件下的传热和阻力特性进行了实验研究。得出了具有一定精度和适用范围的管内对流换热及阻力特性关联式，并应用量纲分析方法得出了管外凝结换热的准则方程式。