基于S7-200的盐业自动化包装生产线供料系统的一种面向对象程序设计方法

本文分析了盐业自动化包装生产线供料系统的控制要求,并描述了一种在S7-200CPU上实现面向对象编程的技巧。通过对被控模型的分析,叙述了如何利用此技巧,构造整个程序方法,从而达到了快速,高效的生成优质控制程序的效果。     

中小型污水处理厂控制系统的设计与应用

以某城市污水处理工程为例,构建了基于PLC的污水处理厂自动控制系统;重点阐述了该工程自动控制系统的实现过程;为PLC在污水处理工程中的使用提供了一个实例.     

Excise Tax Harmonisation in Australia at Federation

Constitutional changes at the time of Federation in Australia required the harmonisation of the excise tax rates of the former Colonies. This paper outlines the excise tax systems of the Colonies before Federation and that of the Commonwealth after Federation. Estimates are made of the consumer tax equivalent rates and of the implicit rates of protection in each Colony and in the Commonwealth after Federation. The Commonwealth Government harmonised the excise tax rates of the Colonies at about the mid‐points of the rates of the Colonies but the implicit rates of protection increased after Federation.     

我国开放式基金营销策略组合研究

伴随着开放式基金业的发展,传统的4PS营销策略已经越来越不能适应开放式基金发展的需要,结合开放式基金业是金融服务业这一特点,借助CS营销战略及7PS营销理论这两大理论的优势,构建了CS营销战略指导下的7PS营销理论模型及实施效果评估体系。     

7-ELEVEN的特色物流对我国特许经营企业物流的启示

我国特许经营企业经过近20多年的发展,已经初具规模,但是便利店(特许经营方式)行业的经营现状却不容乐观,个别加盟店甚至面临经营困境.在此经济环境下,7-ELEVEN一枝独秀,堪称业内奇迹.从确立科学的供应链物流区域战略,到构建独特的物流配送体系,7-ELEVEN特色物流对相关行业有一定的借鉴意义.     

Quo vadis Euro?

This paper calculates the equilibrium exchange rates for the Euro and the rest of the G-7 currencies. Building on the methodology of Alberola et al., it is shown that the stock of net foreign assets and the evolution of productivity are the fundamentals underlying the behaviour of the real exchange rate. Panel cointegration techniques allow for the extraction, using an unobserved components methodology, of a time-varying equilibrium real exchange rate, and deviations from this equilibrium provide an estimate of the degree of multilateral misalignment. Finally, an algebraic transformation converts these multilateral equilibrium real rates into bilateral equilibrium nominal rates. The results uncover that the Euro was slightly undervalued by the start of Stage III of EMU and that, despite a faint fall of its fundamentals since then, the slide during 1999 has widened the misalignment above 10% against other main currencies.     

How economic rewards affect cooperation reconsidered

Recent studies suggest that payoffs in cents, compared to dollars, produce less defection in a repeated prisoner’s dilemma game. We are unable to replicate these findings with conventional economic procedures or in a direct replication.     

A theory of the competitive saving motive

Motivated by recent empirical work, this paper formalizes a theory of competitive savings — an arms race in household savings for mating competition that is made more fierce by an increase in the male-to-female ratio in the pre-marital cohort. Relative to the empirical work, the theory can clarify a number of important questions: What determines the strength of the savings response by males (or households with a son)? Can women (or households with a daughter) dis-save? What are the conditions under which aggregate savings would go up in response to a higher sex ratio? This theory can potentially help to understand the savings patterns in China, India, Vietnam, Singapore, Hong Kong, and other economies that have experienced a dramatic increase in the pre-marital sex ratio.     

Information aggregation in financial markets with career concerns

What are the equilibrium features of a dynamic financial market in which traders care about their reputation for ability? We modify a standard sequential trading model to include traders with career concerns. We show that this market cannot be informationally efficient: there is no equilibrium in which prices converge to the true value, even after an infinite sequence of trades. We characterize the most revealing equilibrium of this game and show that an increase in the strength of the traders' reputational concerns has a negative effect on the extent of information that can be revealed in equilibrium but a positive effect on market liquidity.