高等职业技术教育专科学制改为二年的探讨

高等职业技术教育专科学制由三年改为二年是教育部根据市场需要、提高高等教育毛入学率的要求以及从减轻家长负担的角度考虑所做出的综合发展战略。我们要紧紧把握高等职业技术教育培养高技能型紧缺人才这一目标，重新定位，坚持以服务为宗旨、以就业为导向，进行广泛的校企合作。通过课程调整，实现与岗位的高匹配、零接轨，提高高等职业技术专科学生的就业率。     

Optimizing service-level and relevant cost for a stochastic multi-item cyclic production system

A multi-item make-to-order production system in a stochastic environment is analyzed. Assuming a common cycle production approach, the impact of safety stock, cycle time, demand, processing time and setup time on service-level and total relevant cost (holding, setup and backorder cost) is determined. To illustrate this relationship a trajectory for the service-level with respect to the relevant cost (holding and setup) is presented. Furthermore algorithms to calculate the cycle time which leads to maximum service-level at constant safety stock and to calculate the pair cycle time and safety stock which minimize total relevant cost are introduced.     

移相法实现单边带信号的调制

本文单边带（ＳＳＢ）信号的２种产生方法，即滤波法和移相法。重点对移相法的产生ＳＳＢ信号的方法作了祥细的讨论并给出了具体的电路，这种产生ＳＳＢ信号的方法具有载波法抑制比低、低成本、不需要滤波器，对相位误差和增益误差要求不高等突出特点。     

Schedule evaluation in unstable manufacturing environments

This paper provides a new approach to validate the feasibility of schedules of multiple-step mixed-model unstable manufacturing environments with different changeover times. Traditionally, continuous lines in a manufacturing process run the same sequence in order to minimize WIP inventory and lead time. Nevertheless, multiple reasons such as different product mixes or setup times can lead managers to run different sequences in continuous lines. Unfortunately, lack of reliability of supply and demand in these environments makes it difficult to manage product inventories and often leads to starvation due to the discoordination between the schedules of both lines. This approach is based on a new type of visual representation of schedules and an estimate the probability of starvation. It assumes stochastic supply and demand and a predefined schedule sequence based on batches of different sizes.     

Stackelberg equilibrium with multiple firms and setup costs

I provide conditions that guarantee that a Stackelberg game with a setup cost and an integer number of identical leaders and followers has an equilibrium in pure strategies. The main feature of the game is that when the marginal follower leaves the market the price jumps up, so that a leader’s payoff is neither continuous nor quasiconcave. To show existence I check that a leader’s value function satisfies the following single crossing condition: When the other leaders produce more the leader never accommodates entry of more followers. If demand is strictly logconcave, and if marginal costs are both non decreasing and not flatter than average costs, then a Stackelberg equilibrium exists. Besides showing existence I characterize the equilibrium set and provide a number of results that contribute to the applied literature. As the number of leaders increases, leaders produce more and eventually they deter entry. Leaders produce more than the Cournot best reply, but they may underinvest in entry deterrence. As the number of followers increases, leaders become more aggressive. When this number is large, if leaders can produce the limit quantity and at the same time have market power, then they deter entry.     

Unrelated parallel machine scheduling with setup consideration and a total weighted completion time objective

This paper addresses the problem of scheduling a set of independent jobs on unrelated parallel machines with job sequence dependent setup times so as to minimize a weighted mean completion time. The study of the problem stemmed from a real service industry problem. This problem is at least NP-hard in the ordinary sense, even when there are only two identical machines with no setups. Seven heuristic algorithms are proposed and tested by simulation. The results and analysis of quite extensive computational experiments are reported and discussed. The findings through the computational results are presented. Whether this problem is strongly NP-hard is left as an open question.     

高职教育专业建设的构思与探索

高职高专办学水平的高低取决于毕业生就业率的高低，而高职高专院校毕业生的就业率如何归根结底取决于专业设置的市场符合性以及专业建设是否满足高职高专的应用型人才培养的需要．文章通过分析我国高职教育在专业建设中存在的问题，从专业设置、专业建设和专业建设管理三个环节提出解决问题的思路和办法。     

大型海运集装箱港口放射性安全方案研究

放射性检测仪器的合理设置是确保放射性检验工作有效的基础。本文参照国际原子能机构推荐的多极检查方案,结合大型港口进出场道口设置的2种模式,对放射性安全仪器的设置方案进行对比讨论,综合考虑全面覆盖、经济合理、计量维修便捷等因素,提出了放射性安全仪器设置的推荐方案,供日常检验参考。     

加强构建中国完备的宏观调控法律体系

在当前社会经济发展中宏观调控作用显著。在进行社会主义市场经济改革中中国重视宏观调控的作用,并不断致力于宏观调控原则和措施的法律化。为满足当前中国市场经济发展和法治原则的要求,应结合中国具体实际经验并借鉴国外有关立法先例,加快构建中国完备的宏观调控法律体系。