On the inapproximability of the exemplar conserved interval distance problem of genomes

In this paper we present two main results about the inapproximability of the exemplar conserved interval distance problem of genomes. First, we prove that it is NP-complete to decide whether the exemplar conserved interval distance between any two genomes is zero or not. This result implies that the exemplar conserved interval distance problem does not admit any approximation in polynomial time, unless P=NP. In fact, this result holds, even when every gene appears in each of the given genomes at most three times. Second, we strengthen the first result under a weaker definition of approximation, called weak approximation. We show that the exemplar conserved interval distance problem does not admit any weak approximation within a super-linear factor of , where m is the maximal length of the given genomes. We also investigate polynomial time algorithms for solving the exemplar conserved interval distance problem when certain constrains are given. We prove that the zero exemplar conserved interval distance problem of two genomes is decidable in polynomial time when one genome is O(log n)-spanned. We also prove that one can solve the constant-sized exemplar conserved interval distance problem in polynomial time, provided that one genome is trivial.     

Firm-level correlates of emergent green supply chain management practices in the Chinese context

Greening the supply chain is increasingly a concern for many business enterprises and a challenge for logistics management in the 21st century. Of particular concern is how to arouse organizational environmental awareness and put environmental activities into practice in the logistics activities of their supply chains. This paper investigates the correlation of two major factors, organizational learning and management support, with the extent of adoption of green supply chain management (GSCM) practices in Chinese manufacturing firms, where their inbound and outbound logistics activities are potential polluters to the environment. Organizational and operational learning was derived from the firm's experience with programs such as total quality management and environmental management systems. Management support included support for GSCM ideas and practices from top and middle-level management and cooperation across organizational functions. We find significant positive relationships between organizational learning mechanisms, organizational support and the adoption of GSCM practices, after controlling for a number of other influences including regulations, marketing, supplier, cost pressures, industry levels of the relevant practice and organizational size. Implications of our findings on logistics management are discussed.     

浅论知识经济背景下的人才培养

知识经济时代迫切需要培养大批优秀人才。然而，我国人才现状与人才培养面临着严峻的挑战。基于此，本文从我国现实国情出发，试图探索出一条适合我国国情的培养知识经济人才的新路。     

动物剥制标本制作技术

动物生态标本制作过程中 ,关键的技术措施是如何保证所制的标本的形状正常 ,坚固耐用和无毒安全 .本文从实际操作的经验出发 ,对标本制作的各个环节进行了总结 ,并对其中的毒物防腐工艺作了低毒和无毒处理     

论广东第一次全省商民协会代表大会

1926年5月广东第一次全省商民协会代表大会的顺利召开,是国民党初期推行商民运动取得重要成效的具体表现之一。本次会议不仅发表了大会宣言,通过了10余个重要议案,而且还成立了广东全省商民协会,颇受国民政府的重视,也得到舆论的肯定与赞扬。在此之后,更多的商民开始关心政治、积极参与各项政治运动,使广东省的商民运动得到进一步发展。但是,本次大会的召开与广东全省商民协会的成立,并没有完全消除各地商民协会之间相互纷争的混乱状况,甚至全省商民协会内部还曾发生纠纷,与国民党广东省党部所设之商民部之间的关系也没有理顺,最后经国民党中央商民部的直接干预和安排,广东全省商民协会接受了广东省商民部的统辖指挥。     

初等概率论中的收敛性注记

通过介绍初等概率论中的四种收敛性 ,揭示了它们之间的相互关系     

一篇18世纪文人的独立人格宣言——对约翰逊书信的文体学分析

英国18世纪学者塞缪尔·约翰逊以他所编撰的<英文辞典>而在文坛享有盛名.但他于1755年公开发表的<致切斯菲尔德爵爷书>却以其独特的艺术魅力流传于后世.该书信文风典雅庄重,句句暗含弦外之音,堪称18世纪讽刺文体的典范.在短短的几百字篇幅内大量使用修辞手法,各种修辞技巧诸如反讽、排比、反问、长句、低调陈述等在他笔下信手拈来,无不焕发出独特的魅力.它们在赋予我们审美愉悦的同时,也折射出作者的思想.     

现代出版管理学的学科地位、研究对象和意义

出版是人类文明发展进程中最伟大的发明之一,自从有了出版活动就产生了出版管理的萌芽,然而,出版管理从萌芽走向科学,却经历了几千年的探索历程.目前,原始的出版活动已经发展为文化产业,出版活动的发展规律越来越亟待人们重新认识和发现.出版管理学在出版科学体系中的学科地位日益突出,出版学的研究对象日益明晰,开展出版管理学研究的现实意义更加凸显;与出版管理学邻近的出版学、管理学、社会学、传播学、新闻学、编辑学等学科的发展已相当成熟,所有这些都为研究出版管理学提供了客观条件,也奠定了理论基础.因此,作为部门管理学的重要分支--出版管理学的建立具有特殊的政治、社会、经济和文化意义.     

民办高校档案“双套制”管理模式的价值探索与路径选择

民办高校在学校管理活动中形成了大量的纸质档案资料和以电子数据储存为特征的电子档案、胶质缩微品档案。纸质档案资料和以电子数据储存为特征的其它档案,由于它们各自的作用、特点不尽相同,实行双套制管理在高校档案管理系统中有特殊的应用价值。这种新型双套制管理的路径模式主要是：依据数字档案的基础理论考察“双套制”档案管理的基本问题;对双套档案管理的范围做初步限定;建立网络基础环境下的安全技术方案;科学配置“双套制”档案管理的内容。