定时器的PLC程序设计

本文旨在实现接通延时定时器、断开延时定时器、多谐震荡器的时序图及PLC程序设计。     

浅谈丘陵地区市政排水管道的设计思路

本文主要探讨丘陵地区市政排水管道的设计思路,着重分析了丘陵地区排水系统的特点及相应的工程设计方案,确保丘陵地区市政排水管道建设具有可行性。     

Advanced information technology: transforming service innovation and design

This research explores the role of advanced information technologies at the ‘fuzzy’ front-end of service innovation and design. Service researchers have been exploring the application of technology to services for a while, however there has been little attention paid to the use of technology at the front-end of service innovation and design. Research suggests that advanced information technologies should be useful in research and development for services; but how this may occur has not been explored. Bringing together design thinking and the technology–organization–environment framework for technology adoption this research develops propositions for research to expose how technology can advance and transform service innovation and design. Theoretical and practical research questions are offered to guide inquiry in this emerging research space.     

Measuring the perceived container leasing prices in liner shipping network design with empty container repositioning

This paper aims to measure the perceived container leasing prices at different ports by presenting a two-stage optimization method. In stage I, we propose a practical liner shipping network design problem with empty container repositioning. The proposed problem further considers the use of foldable containers and allows the mutual substitution between empty containers to decrease the number of empty containers to be repositioned. In stage II, the inverse optimization technique is used to determine the perceived container leasing prices at different ports, based on the solution obtained in stage I. Based on a set of candidate liner shipping service routes, a mixed-integer nonlinear programming model is built for the proposed problem in stage I. The nonlinear terms are linearized by introducing the auxiliary variables. Numerical experiments based on a realistic Asia-Europe-Oceania liner shipping network are carried out to account for the effectiveness of our two-stage optimization method.     

A profit-maximization location-capacity model for designing a service system with risk of service interruptions

This paper considers the design of an immobile service system in which each facility’s service process is subject to the risk of interruptions. The location-capacity decisions and allocations are simultaneously made to maximize the difference between the service provider’s profit and the sum of customers’ transportation and waiting costs. An efficient Lagrangian-based solution algorithm is developed, which solves large-sized instances with up to 50 service facilities and 500 customers in a few seconds. Several sensitivity analyses and managerial insights are presented. The model is also applied to a case study on a logistics network design problem in the zinc mining industry.     

Counterfeiting as Private Money in Mechanism Design

We describe counterfeiting activity as the issuance of private money, one that is difficult to monitor. Our approach, which amends the basic random‐matching model of money in mechanism design, allows a tractable welfare analysis of currency competition. We show that it is not efficient to eliminate counterfeiting activity completely. We do not appeal to lottery devices, and we argue that this is consistent with imperfect monitoring.     

寒地城市街旁绿地园林小品设计研究

寒地城市具有特殊的气候特点和人文特色，园林小品在寒地城市街旁绿地设计过程中具有重要的作用。只有克服寒冷气候对园林造景的不利影响，充分挖掘寒地城市的特色，并将其体现在街旁绿地的园林小品设计过程中，才能提高户外绿地的吸引力，为居民提供舒适的体闲环境。     

大跨度屋盖结构的抗风设计缺陷与对策

本文分析了当今大跨度屋盖结构的抗风设计方法,并指出了其缺陷,而后探索了相应的对策,以解决现实问题。     

简述建筑设计与城市设计的关系

建筑设计与城市设计在许多理论和观点上是一致的,它们在设计上有共同交集的部分。但由于二者在城市建设中,处在不同层面,担当着不同角色,有着各自不同的利益,不免会产生矛盾。本文就我国的发展状况简单叙述如何处理好建筑设计与城市设计的关系,旨在提升城市的品位。     

山区变电站竖向设计初探

文章阐述了变电站总图设计中竖向设计的4种形式和影响变电站竖向设计的因素,并通过实例分析指出适宜山区变电站采取的竖向布置形式。