城市基础设施风险影响因素与作用路径——基于20个特大城市案例定性比较分析

特大城市基础设施由于复杂网络的关联性使其脆弱性更加显著,在外部风险冲击下,一旦应对失当,不仅会导致基础设施关联系统产生级联灾害,而且会引发风险外溢等问题。在风险社会的语境下,基于特大城市的发展现状,本文针对复杂关联系统基础设施网络的脆弱性,选取国内20个特大城市基础设施风险事件案例,利用定性比较分析方法解析特大城市基础设施系统关联风险的主体性影响因素,揭示政府应急管理各因素之间的逻辑关系和作用路径,提出“监管执行—应急能力—主体行为—制度规范”四维安全监管模式,以有效提升其应对风险的韧性。

涉警网络舆情的影响因素与生成机理研究——基于30个案例的模糊集定性比较分析

基于政治沟通理论,以近年来国内发生的30起涉警事件为例,运用模糊集定性比较分析方法,探究公安机关、公众、媒体在涉警网络舆情中的联动效应和涉警网络舆情的触发机理,结果显示,单一变量不构成高热度涉警网络舆情的必要条件。公安机关信息回应的时效性与客观性对于涉警网络舆情的产生与发展具有重要影响。数字场景下的涉警网络舆情在生发机制上愈发表现出一种“公众聚焦+媒体放大”的路径组合样态,在治理模式上呈现出由公权力主导向多主体协同转变的趋势。

上市公司ESG责任履行驱动模式研究——基于TOE框架的动态数据分析

本文基于TOE框架和组态视角构建企业ESG责任履行的理论模型,采用NCA和fsQCA方法对我国上市公司案例进行组态分析。通过跨案例定性比较分析拓展了企业ESG责任履行的研究内容,进而为企业ESG责任履行提供了管理建议,旨在推动企业管理者依据外部环境和自身资源优势,利用差异化组态实现ESG战略。

吴某的行为是否构成挪用公款罪

[案例]中国A技术进出口总公司工会于1992年在深圳开会期间,由吴某(男,54岁,中国A技术进出口总公司工会副主席)、吕某、孙某等人倡议搞个人集资。会后先由吴等几个人凑钱,后又有多人参加,吴让当时工会职员杜某收钱,单独记账,存转利用了工会风险基金账户,集资款最高时达900...

Ground stability of underground gateroad with 1 km burial depth： A case study from Xingdong coal mine, China

This paper presents an integrated investigation of the ground stability of a deep gateroad with a 1 km burial depth based on a field test, case studies, and numerical modelling. In situ stress measurements and mechanical properties tests were first conducted in the test site. Then, the deformation behavior, stress and yield zone distributions, as well as the bolts load of the gateroad, were simulated using FLAC3D software. The model results demonstrated that the soft rock properties and high in situ stress were the main factors for the deep gateroad instability, and the shear slip failure induced by the high stress was the primary failure model for the deep rock mass. In addition, the unsuitable support patterns, especially the relatively short bolts/cables with low pre-tensions, the lack of high-strengthen secondary supports and the unsupported floor strata, also contributed to the gateroad instability. Subsequently, a new combined supporting strategy, incorporating longer bolts/cables, yielding ring supports, and grouting measures, was proposed for the deep gateroad, and its validity was verified via field monitoring. All these could be a reference for understanding the failure mechanism of the gateroad with 1 km burial depth.

Intelligent model of rehabilitation training program for stroke

In view of the uncertainty and complexity,the intelligent model of rehabilitation training program for stroke was proposed,combining with the case-based reasoning(CBR) and interval type-2 fuzzy reasoning(IT2FR).The model consists of two parts:the setting model based on CBR and the feedback compensation model based on IT2FR.The former presets the value of rehabilitation training program,and the latter carries on the feedback compensation of the preset value.Experimental results show that the average percentage error of two rehabilitation training programs is 0.074%.The two programs are made by the intelligent model and rehabilitation physician.That is,the two different programs are nearly identical.It means that the intelligent model can make a rehabilitation training program effectively and improve the rehabilitation efficiency.

Stability analysis via the concept of Lyapunov exponents―a case study

The dynamics characteristics of the robotic arm system are usually highly nonlinear and strongly coupling,which will make it difficult to analyze the stability by the methods of solving kinetic equations or constructing Lyapunov function,especially,these methods cannot calculate the quantitative relationship between mechanical structures or control input and dynamics parameters and stability.The theoretical analysis process from symbol dynamics modeling of the robotic arm system to the movement stability is studied by using the concept of Lyapunov exponents method. To verify the algorithm effectiveness,the inner relation between its joint input torque and stability or chaotic and stable motion of the 2-DOF robotic arm system is analyzed quantitatively. As compared with its counterpart of Lyapunov's direct method,the main advantage of the concept of Lyapunov exponents is that the methods for calculating the exponents are constructive to provide an effective analysis tool for analyzing robotic arm system movement stability of nonlinear systems.

Enhancing stability through ligand-shell engineering： A case study with Au25（SR）18 nanoclusters

While thiolate-protected Au nanoclusters （NCs） have drawn considerable interest in various fields, their poor stability in aqueous solution remains a major hurdle for practical applications. Here, we report a unique strategy based on ligand-shell engineering to improve the stability of thiolated Au NCs in solution. By employing two thiol-terminated ligands having oppositely charged functional groups on the surface of the NCs, we demonstrate that the electrostatic attraction between the oppositely charged functional groups of neighboring ligands could amplify the coordination among surface ligands, leading to the formation of pseudo-cage-like structures on the NC surface that could offer higher protection to the Au core in aqueous solution. The strategy developed in this study could be extended to toward practical applications. other metal NCs, further paving the way

将对文化活动的直接控制作为调解区域可持续吸引力的手段——对成功管理条件的分析

当今分权的公共机构所固有的管理问题之一是,其行为模式会发生深刻的变化(Divay and Mazouz,2008)。我们特别注意到,各地日益从战略上将文化政策和文化活动进行整合,以期保持其可持续的吸引力。为了达到这一战略性目标,越来越多的地方都选择组织活动,尤其是文化活动,这被看作是中期目标。各个城市策划和举办一系列丰富多彩的活动,这些活动标志着区域管理越来越趋向于项目管理,与此同时提出了一系列问题,如如何拟定活动战略,以及如何在组织和区域内实施该战略。本文以'毕加索-艾克斯2009(Picasso-Aix 2009)'为案例,通过对这一独特而典型的案例进行分析,对充分利用文化活动来保持区域可持续吸引力的管理条件进行了讨论。对实践工作者的启示本研究强调文化和区域'活动化(eventization)'的危险,提出在社区间(区域战略相关因素)层面上管理文化活动的方法性问题,这些问题是在社区部门(内部管理方法相关因素)的直接控制下产生的。通过对这一问题的多视角分析,本文提出了包含普遍成功关键因素的一套程序,实践者可以据此构建区域层面上的文化活动,本文还讨论了战略发展以及项目管理和利益相关者。