半经验分子轨道理论中Slater轨道指数对分子性质的一些影响

半经验分子轨道理论中Slater轨道指数ζ可表示成原子静电荷q的函数。本文按这种方法讨论了ζ随q的这种变化对分子性质的一些影响。     

基于进化博弈的专利联盟形成研究

专利联盟作为高新技术产业发展的主导范式,对技术标准的建立有重要的作用。但是多数情况下提高社会福利的联盟却难以形成,这就是所谓专利联盟的形成困境问题。从专利权人的有限理性和重复博弈角度分析专利联盟的形成,分别建立对称和非对称专利联盟形成的进化博弈模型,得到不同条件下的进化稳定策略,并探讨影响联盟形成的条件和因素。研究结果表明,专利联盟更容易在弹性高、竞争激烈的市场环境中形成;与事实标准建立以后相比,在事前组建的专利联盟形成可能性更大;通过多方途径保护和提高加入联盟的专利权人的利润,同时抑制阻碍联盟的专利权人的利润,是促进联盟形成的关键;与专业R&D企业相比,纵向一体化企业有更强的动机加入联盟。健全和完善相关法规及配套服务对联盟形成也是有益的。     

基于系统动力学的“互联网+健康医疗”体系模型

“互联网+健康医疗”模式已然成为我国健康医疗产业发展的一个新方向,为解决传统医疗行业中存在的诸多问题提供了新思路。在分析“互联网+健康医疗”对传统医疗的影响及其发展机制的基础上,利用存量流量图等工具构建“互联网+健康医疗”体系模型,运用Vensim软件对我国“互联网+健康医疗”发展情况进行仿真,并模拟相关政策的干预效果。结果表明:“互联网+健康医疗”在降低潜在医疗需求(PMD)、促进分级诊疗中具有重要作用,保障医疗保险能够较好地嵌入“互联网+健康医疗”就诊流程中对降低PMD最有意义,而降低整体门诊价格对于优化就医结构、促进分级诊疗最为有效。     

旅游城镇化驱动乡村振兴的影响效应研究

旅游城镇化作为新型城镇化的一种典型模式,是新发展阶段实现乡村振兴的有效路径。以张家界武陵源区为例,紧扣旅游城镇化驱动乡村振兴的关键影响因素和传导路径,基于系统动力学方法对旅游城镇化驱动乡村振兴的影响效应进行仿真模拟。研究发现,旅游城镇化对乡村振兴的驱动是一个复杂的动态过程,需精准分析旅游城镇化作用乡村振兴的不同路径及其影响效应;武陵源区目前的自然发展模式虽能创造较好的经济增长效应,但会造成结构性失业、资源破坏和环境污染等问题;在5种仿真模式中,兼顾经济-社会-环境的协同发展路径是推进乡村振兴的最佳模式;旅游政策影响因子在不同仿真模式中均成为重要的政策因子,印证了武陵源区旅游发展在乡村振兴战略中的重要地位。实现旅游城镇化对乡村振兴的最佳驱动必须从经济增长、社会文化与生态优化三个层面联合发力,以系统化的协同发展路径促进乡村振兴。研究有助于进一步理解旅游城镇化与乡村振兴的多元内在关系,为我国乡村地区尤其是西部民族地区的乡村振兴提供借鉴。     

医药企业负面网络舆情演化及应对策略研究

探讨因媒体不当报道引发医药企业网络舆情危机的演变规律,为企业找寻适宜的对策,有助于提高医药企业危机应对能力。文章以“深圳康泰公司乙肝疫苗信任危机”为例,构建了医药企业负面网络舆情演化和响应策略的系统动力学模型,并采用Vensim PLE软件进行仿真。结果表明:医药企业负面网络舆情经过酝酿、爆发、衰退三个阶段,且呈现爆发时间短、热度高、负面情绪强的特点;医药企业应根据舆情演化阶段特征采取不同应对策略,三个阶段对应有效应急策略依次是提升舆情监测能力、端正担责态度、提高信息公开度和沟通能力、注意形象修复和注重人文关怀。其中,提高信息公开度和沟通能力对负面网络舆情热度的峰值均有明显的削弱效果,整体提升企业舆情应对能力是改善舆情、挽救医药行业信任危机的有力措施。     

Symbolic correlation integral

This paper aims to introduce the concept of symbolic correlation integral SC that is extensively used in many scientific fields. The new correlation integral SC avoids the noisy parameter 𝜀 of the classical correlation integral, defined by Grassberger and Procaccia (1983 Grassberger, P., Procaccia, I. (1983). Measuring the strangeness of strange attractors. Physica D: Nonlinear Phenomena 9(1–2):189–208.[Crossref], [Web of Science ®] , [Google Scholar]) and extensively used for constructing correlation-integral-based statistics, as in the BDS test. Once the free parameter 𝜀 disappears, it is possible to construct a nonparametric powerful test for independence that can also be used as a diagnostic tool for model selection. The symbolic correlation integral is also extended to deal with multivariate models, and a test for causality is proposed as an example of the theoretical power of the new concept. With extensive Monte Carlo simulations, the paper shows the good size and power performance of symbolic correlation-integral-based tests.     

Learning,signaling, and convincing: The role of experimentation in the business modeling process

This study examines experimentation in the business modeling process, unpacking three different roles of experimentation: learning, signaling, and convincing. Learning is an inherent role of experimentation, as managers typically experiment to engage with the environment and to obtain knowledge. This study uncovers another set of roles, which have a symbolic nature. These roles show that experimentation is not just a learning process, but also a strategic legitimation process, aimed at enacting the environment. Experimentation serves the purpose of signaling to potential customers and other stakeholders, and of convincing them to embrace the business model. Furthermore, this study shows that experimentation takes two forms—purposeful interactions and experimental projects—and that these forms can support the different roles of experimentation.     

The potential of online social networking data for augmenting the study of high-risk personal networks among young men who have sex with men at-risk for HIV

Capturing dynamics in high-risk personal networks is essential for preventing HIV transmission. Online social networking data offer incentive to augment traditional selfreported approaches for network enumeration. To explore what online networks reveal about dynamics among high-risk associates, we examine the relationship between egocentric confidant and sex networks and personal Facebook friendship networks of a cohort of young Black men who have sex with men. Although overlap exists between self-reported and Facebook associates, the stabilities of each were unrelated. Confidants who were also Facebook friends with a respondent were, however, more likely to be retained. Thus, Facebook networks contain stable confidants.