电磁学与电信技术发展简述

本文简述了以法拉第电磁感应定律和麦克斯韦电磁场为中心的电磁学发展简史,论述了几种基于电磁理论建立起来的重要电信技术的工作原理和简单发展历程,并略论了未来电信技术的发展趋势.     

国家科技奖励是通向院士大门的敲门砖吗?

本文采用公开的数据资料对两院院士候选人及当选院士获得国家科技三大奖励的比例进行了实证研究。研究发现,近年来中国科学院院士候选人和当选院士中以第一完成人名义获得国家自然科学奖和国家科技进步奖的比例均明显上升;中国工程院院士候选人和当选院士中以第一完成人名义获得国家发明奖和国家科技进步奖的比例均明显上升。获得国家自然科学奖和国家科技进步奖对两院院士增选第一轮评选有明显的正面影响,但是对第二轮及以后的评选没有明显的影响。获得国家发明奖只对中国工程院院士增选第一轮评选有一定的正面影响。这大概就是圈内所谓获得国家科技奖励是通向两院院士大门的"敲门砖"的真实含义。     

论身体思维

不能把人的认知都归功于大脑,无视身体和身体思维的认知价值.其实正是人的身体结构、身体欲望、身体行为、身体意向、身体爱好、认识冲动、好奇心、求知欲、潜意识、自由意志、身体场、知觉场,以及在此基础上形成的身体思维或身体智能,一起构成认知的源泉和机制.因此身体思维才是大智慧;才是一切认识、文化艺术、科学技术的起点;才是获得知识、成就事业、完善人性、推进人类发展的基础.     

A new two-party bargaining mechanism

If resources and facilities from different partners need to be engaged for a large-scale project with a huge number of tasks, any of which is indivisible, decision on the number of tasks assigned to any collaborating partner often requires a certain amount of coordination and bargaining among these partners so that the ultimate task allocation can be accepted by any partner in a business union for the project. In the current global financial crisis, such cases may appear frequently. In this paper, we first investigate the behavior of such a discrete bargaining model often faced by service-based organizations. In particular, we address the general situation of two partners, where the finite Pareto efficient (profit allocation) set does not possess any convenient assumption for deriving a bargaining solution, namely a final profit allocation (corresponding to a task assignment) acceptable to both partners. We show that it is not appropriate for our discrete bargaining model to offer the union only one profit allocation. Modifying the original optimization problem used to derive the Nash Bargaining Solution (NBS), we develop a bargaining mechanism and define a related bargaining solution set to fulfil one type of needs on balance between profit-earning efficiency and profit-earning fairness. We then show that our mechanism can also suit both Nash’s original concave bargaining model and its continuous extension without the concavity of Pareto efficient frontier on profit allocation.     

对于乡村旅游业发展的思路

发展乡村旅游业,对于促进新农村建设,促进农业发展,提高农民生活水平质量都具有非常重要的意义。本文从发展乡村旅游业的重要性出发,提出了乡村旅游业对农村经济的作用,分析了我国乡村旅游业的现状和存在的问题,在此基础上,重点探讨了乡村旅游业未来发展的新思路:转变观念,充分认识乡村旅游的重要性;沿着与生态旅游、文化旅游相结合的方向发展;开展可持续乡村旅游的发展规划;注重人才培养,从业人员服务质量的提高。     

CRM赢回策略对消费者购买行为影响的实证研究

一直以来,营销学界都把客户关系管理(Customer Rehtionship Management)的重点放在如何获得新顾客和维持现有顾客身上,而流失顾客赢回管理工作的重要性却长久地被忽视.为了证明失而复得顾客的重要价值,作者把顾客在流失前、赢回后两个不同阶段的满意度和购买份额作对比分析,结果发现,赢回后的顾客满意度和购买份额较流失前显著增加;用关系投资或价格促销策略赢回来的顾客满意度和购买份额,较被关系投资或价格促销吸引来的新顾客满意度和购买份额显著提高;流失前,顾客满意度与购买份额之间拟合的函数曲线呈反S型,厂商策略对这一阶段的顾客行为影响不显著;赢回后,顾客满意度与购买份额之间拟合的函数曲线呈S型,赢回策略对这一阶段的顾客行为影响显著;满意度与购买份额拟合的函数曲线参考点发生了位移.     

谦卑领导行为与下属工作投入：有中介的调节模型

谦卑领导行为是近年来新出现的一个广受研究者和管理实务者关注的领导主题,其有效性和作用机制有待更多实证研究的深入探讨.基于自我概念衍生理论视角,采用问卷调查法收集375份员工数据,在检验共同方法偏差和问卷信效度的基础上,通过有中介的调节作用检验程序,考察谦卑领导行为对下属工作投入的影响,并探讨下属组织自尊的中介作用和权力距离的调节作用.研究结果表明,谦卑领导行为能够显著正向预测下属的工作投入;下属的权力距离在谦卑领导行为与下属工作投入关系间发挥有中介的调节作用,对于高权力距离的下属,谦卑领导行为对其工作投入的积极影响更强;下属权力距离的调节作用通过下属组织自尊的中介实现,当下属权力距离较高时,谦卑领导行为通过下属组织自尊的中介对其工作投入产生的积极影响更加强烈.     

概率准则下的投资决策与有效边界间的关系

本文在证券收益率服从正态分布的前提下,对于允许卖空与不允许卖空这两种情况,分别讨论了概率准则下的投资决策与有效边界间的关系,并举例予以了说明。     

Decision support system for the batching problems of steelmaking and continuous-casting production

This paper investigates two batching problems for steelmaking and continuous-casting (SCC) production in an integrated iron and steel enterprise. The tasks of the problems are to make the decisions as how to consolidate ordered slabs into charges, and then how to group charges into casts. The effective decisions on these batching problems can help to balance the requirements of materials in downstream production lines, improve the customer satisfaction levels, and reduce production costs (including reduction of open ordered slabs, less slabs quality upgrading, reduction of steel-grade changeovers, and reduction of inefficient utilization of tundishes lives). We first formulate the problems as integer-programming models by consider practical constraints and requirements, and then develop the two heuristic algorithms for the corresponding batching problems. By embedding above models and algorithms, we develop decision support system (DSS) software with interactive planning editor. The DSS has been tested by using practical data set collected from the steelmaking plant in Baosteel which is one of the most advanced iron and steel enterprises in China. Computational experiments demonstrate that the models and algorithms developed can generate the satisfactory solutions when they work together with the planning editor in the DSS.