Endogenous structural change and crisis in a multiple time-scales growth model

The slow and endogenous twist of economic macro-structure makes up an important evolutionary feature of capitalist economies, and may be at the root of structural crisis. In this line, a Goodwinian growth model with increasing returns and profit-sharing that tries to picture a simple scenario of the seventies crisis is considered. It is shown that the exhaustion of the Kaldor-Verdoorn “productivity law” can entail, in a nonlinear framework, a “catastrophic” bifurcation from a “high” to a “low” growth path. Slow/fast dynamical systems then allow one to formalize a multiple time-scales dynamics where the growth path is shaped by the structural framework in which it takes place, but has also a long -un feedback. Structural change and crisis appear as long term and endogenous outcomes.     

浅谈军地一体化物流体系的构建

在作战和后勤日益融合的今天,单纯由军队负责物资供应保障已经变得很不经济甚至不现实.本文从现代战争特点和物流业的发展出发,提出了构建军地一体化物流体系的设想,并给出了相关建议.     

影响我国农民市场主体地位确立的制度因素

拥有自主产权是农民成为真正市场主体的必要条件,包括诸如组织制度、户籍制度、金融制度、社会保障制度等在内的产权支持系统是影响农民成为市场主体的充分条件。市场主体地位的高低在某种意义上是由经济实体在参与市场经济活动时所拥有的权利束决定的。推进农村经济市场化的过程就是加强农民市场主体地位的过程。进一步深化农村体制改革,从根本上消除不合理制度对农民的束缚,使农民成为真正的市场主体是解决当前“三农”问题的根本出路。     

旅游景区电子解说系统发展初探

随着旅游的发展,旅游解说系统在景区的作用日益引起人们的注意,而电子旅游解说系统的出现,使看起来简单的解说系统融入了科技的因素。文章分析了电子解说系统的现状及与传统解说系统的区别,在此基础上提出了策划的原则及要素,为景区发展电子解说系统提供了借鉴。     

Comparing the impact of management support on police officers’ perceptions of discretionary power and engagement: Australia,USA and Malta

Abstract

This paper uses Social Exchange Theory as a lens for comparing the impact of management support upon police perceptions of discretionary power and employee engagement, across three countries. A survey-based, self-report process collected data from 193 police officers in Australia, 588 from the USA, and 249 from Malta. Structural equation modelling was used to analyse the data. The findings suggest a significantly different management support context across the three countries, as well as significantly different perceptions of discretionary power. Across the three countries, police perceived relatively poor satisfaction with organizational management support and only some engagement levels. However, USA police perceived significantly more discretionary power than the other country samples. These findings provide greater clarity about the link between management support, discretionary power and engagement for the police officers. Since employee engagement likely affects policing outcomes, the findings suggest that poor management support of police officers could negatively affect the provided service. Potential strategies to enhance police engagement include (a) training police managers about how to manage so as to promote greater engagement, and (b) modifying police managers’ performance indicators in line with achieving better police engagement.     

Doing the right thing in the workplace: Responsibility in the face of accountability

Changing trends and the nature of the work force dictate increased personal responsibility by employees and expanded use of self-management practices. Nevertheless, organizations also feel the need to maintain external control. We propose a progressive view of accountability theory which can resolve the dilemma of how internal and external control can effectively coexist. Success of accountability forces is determined primarily by the relationship between the principal (party to whom one is accountable) and the agent (employee). The agent’s felt responsibility is enhanced to the extent that accountability leads to the structuring of expectations, the agent’s perceptions of the task or activity as significant, and the agent’s perception of control over the situation. Propositions that may be used to guide future research are offered throughout the article.     

基于系统动力学理论的军事物资保障系统分析与研究

从军事供应链理论的系统角度出发，对传统的保障模式进行优化整合，引进军事物资保障系统的概念。然后，以系统动力学理论为基础，分析了军事物资保障系统并运用Vensim_PLE软件进行计算机仿真建模。最后，通过对备选方案的评价分析，我们可以选出最优决策方案，并辅助决策者进行决策。     

引入供应链管理思想实现军事物流跨越式发展

供应链管理是物流管理的发展方向和趋势，是一体化的物流管理，是一种新的管理理念和模式。在军事物流领域借鉴和引入供应链管理思想，对提高军事物流保障能力和效益，促进军事物流跨越式发展提供了重要的契机和理论依据。本文从供应链管理的科学内涵、引入供应链管理的必要性以及应关注的几个问题等三个方面进行了论述。     

A Dynamic Leontief Model with Non-renewable Resources

In this paper we study a generalization of the dynamic Leontief input–output model. We extend the standard dynamic Leontief model with the balance equation of non-renewable resources. Obviously, the non-renewable stocks will decrease, exploiting primary resources. In this study we examine the controllability of this extended model by taking the consumption as the control parameter. Assuming balanced growth for both consumption and production, we investigate how long these scarce resources will cover the input needs of production and how the lifetime of the system depends on the balanced growth rate and on the consumption. In doing so, we apply classic results from control theory and on eigenvalue problems in linear algebra.     

模糊自动控制理论在高速公路机电设备中的应用

文章介绍了在直流并励电动机控制中引进模糊自动控制,可以实现电动机恒流起动、恒速运行,降低电机的故障率,保障它的运行。