Minimum power assignment in wireless ad hoc networks with spanner property

Power assignment for wireless ad hoc networks is to assign a power for each wireless node such that the induced communication graph has some required properties. Recently research efforts have focused on finding the minimum power assignment to guarantee the connectivity or fault-tolerance of the network. In this paper, we study a new problem of finding the power assignment such that the induced communication graph is a spanner for the original communication graph when all nodes have the maximum power. Here, a spanner means that the length of the shortest path in the induced communication graph is at most a constant times of the length of the shortest path in the original communication graph. Polynomial time algorithm is given to minimize the maximum assigned power with spanner property. The algorithm also works for any other property that can be tested in polynomial time and is monotone. We then give a polynomial time approximation method to minimize the total transmission radius of all nodes. Finally, we propose two heuristics and conduct extensive simulations to study their performance when we aim to minimize the total assigned power of all nodes. The author is partially supported by NSF CCR-0311174.     

Flow shop scheduling with deteriorating jobs under dominating machines

This paper addresses no-wait or no-idle flow shop scheduling problems with deteriorating jobs, i.e., jobs whose processing times are an increasing function of their starting time. A simple linear deterioration function is assumed and some dominating relationships between machines can be satisfied. It is shown that for the problems to minimize makespan or weighted sum of completion time, polynomial algorithms still exist, although these problems are more complicated than the classical ones. When the objective is to minimize maximum lateness or maximum tardiness, the solutions of a classical version may not hold.     

回报计划感知价值及其与计划忠诚和品牌忠诚的关系研究

目前,客户回报计划已成为一种重要的关系营销手段,相关问题也开始引起学术界的关注。本文研究了回报计划的不同形式是如何影响客户对计划的感知价值的,同时回报计划的感知价值又是如何影响计划忠诚和品牌忠诚的,并且在研究的过程中考虑了产品或服务对客户涉入度的调节作用。结果显示,仅回报类型对计划感知价值的影响受到涉入度的调节,强涉入度下直接回报优于间接回报;而回报时间和回报额度对计划感知价值的影响不受涉入度的调节,延迟回报和差额回报优于立即回报和等额回报。同时,在强涉入度情况下,回报计划的感知价值通过直接和间接两务途径影响品牌忠诚;而在低涉入度争件下,回报计划感知价值对品牌忠诚没有直接影响,而是通过计划忠诚间接影响品牌忠诚。     

家族企业可持续发展的路径选择研究

家族企业在全世界经济中占有重要地位。从各个不同角度研究家族企业可持续发展的理论问题,介绍家族企业可持续发展路径选择的SHEMP理论,并且探讨了此种路径选择与环境的关系:从宏观的角度进行家族企业可持续发展的PEST分析,进而提出在现有融资环境、诚信环境和职业经理人市场条件下,我国家族企业的选择路径。     

Minimal Tetrahedralizations of a Class of Polyhedra

Given a simple polyhedron P in the three dimensional Euclidean space, different tetrahedralizations of P may contain different numbers of tetrahedra. The minimal tetrahedralization is a tetrahedralization with the minimum number of tetrahedra. In this paper, we present some properties of the graph of polyhedra. Then we identify a class of polyhedra and show that this kind of polyhedra can be minimally tetrahedralized in O(n ²) time.     

基于持续竞争能力观的EVA改进

作为业绩衡量的指标,EVA的目的是为了起到更好的激励作用。但实际中却频频起到相反的效果--EVA的激励使经理人不断缩减经营规模。针对上述问题,本文在运用经济学理论对EVA这种业绩评价方式进行深入分析基础上,从持续竞争能力培养的角度提出了EVA的改进方法。     

江苏省综合性医院临床医生对新医改认知研究

为了解江苏省综合性医院临床医生对新医改现状的看法,评价新医改在江苏省内的实施进展和效果,该研究选取了新医改部分重点问题,采用自设计问卷,调查江苏省内7家三级综合性医院和7家二级综合性医院临床医生,运用描述性分析和卡方检验辅助分析研究结果。发现66.5%的医生更希望政府医改经费投入能侧重于医务人员劳动收入;对家庭医生签约服务的认知度及成效评价低于分级诊疗及医联体建设;认为医患关系和看病难、看病贵问题略有改善的医生分别占20.3%、24.9%、27.9%。需正确认识医务人员认知差异及原因;重视医务人员权益、优化薪酬管理制度;加强家庭医生签约服务的宣传和推广;丰富医联体间活动形式;建立及时有效的临床医生反馈机制。     

论先唐所传王逸《楚辞》著作之名实为《楚辞注》 ——兼谈其传播时间

范晔《后汉书·文苑传》较早提出王逸撰《楚辞章句》的说法,此后学者撰述引用而无疑.但《隋志》等目录并未见"王逸《楚辞章句》"之所载;而汉魏晋南北朝时人称引《楚辞》时也无一例外皆不见称引王逸《楚辞章句》.而据李善《文选注》以及其同时代人著作来看,其所称引皆谓"王逸《楚辞注》"而已.且据《文选注》称引其它《章句》如薛君《韩诗章句》、蔡邕《月令章句》等著,以及其言《章句》与"王逸《楚辞注》"等并列而皆不言《楚辞章句》等作法来看,李善等所见王逸《楚辞》著作之书名实为《楚辞注》而非《楚辞章句》.且其著述始为人知当大致在范晔之世,而其初步与广泛流传则当裴骃与顾野王之时,至于唐初方取得权威之地位.     

高校马克思主义信仰教育原则初探

马克思主义信仰教育是思想政治教育的核心,是深化思想政治教育改革的方向.深入地研究合目的性和合规律性的马克思主义信仰教育的原则,具有重大的理论和现实意义."理论与实践结合""科学性与人文性结合""显性与隐性结合""主导性与斗争性结合""合力与分力结合",此五个结合便是马克思主义信仰教育应遵循的原则.五个原则具有内在一致性,相互联系形成了有机的原则体系群,为马克思主义信仰教育提供了相应的标准或准则.     

"秦暴"评议:以秦兼并天下的历史舆论为对象

虽然秦国及后来实现统一之后的秦王朝执政者自诩"秦德",然敌对政治势力多以"秦暴"指斥其军事强势与行政风格.对于秦实现统一的战争攻势,"秦暴"也是失败者历史感觉和文化情绪的记忆.基于对秦王朝政治节奏与政治倾向的反感,后来的政论与史论有持续长久的"秦暴"批判.通过对战国秦汉时期"秦暴"舆论的分析,可以从另一角度考察遭遇败军灭国者的心理,有益于全方位认识秦统一这一历史变化的社会影响.