强化小康社会的经济细胞--简论企业核心竞争力

企业是国民经济的细胞，也是小康社会的经济细胞，增强这个细胞的关键是培育和强化企业的核心竞争力。企业核心竞争力是企业自身拥有的、具有垄断性的、不可模仿的、持久的、高创利的市场竞争能力或能力合成。培育和形成企业核心竞争力有基础要素、前沿要素和终端要素。目前我国企业在培育核心竞争力中存在诸多误区。企业要把核心竞争力的培育放在企业战略重点的位置，从体制、技术和管理创新等方面持续投入。     

Driving on liquid sunshine – the Brazilian biofuel experience: a policy driven analysis

This paper analyses Brazil's experience with biofuels, focusing on the central role of the federal government as the main force driving the implementation of alternative locally produced ethanol (ethyl alcohol) and biodiesel. The pioneering, large scale ethanol programme that started over 30 years ago can be considered the most successful experience with the use of biofuels to date, as the government was able to rapidly implement the use of ethanol (ethyl alcohol) as a substitute for petrol in the 1970s and 1980s. The work contributes to the general discussion of sustainable and renewable energy sources and sets out the key policy mechanisms used. The paper also innovatively looks at the second large governmental intervention in the renewable fuels market – the biodiesel programme. In addition to the contribution to the debate surrounding command‐and‐control measures and economic incentive instruments, the paper analyses how lessons learned from the ethanol experiment were taken into consideration in the design and implementation of the biodiesel mandate, including social and environmental facets. It emphasizes the uniqueness of producing sugarcane ethanol in the Brazilian context and how attempts to carry out similar fast growing biofuels programmes may not be possible in other parts of the world. Copyright © 2008 John Wiley & Sons, Ltd and ERP Environment.     

氢燃料电池动力技术在物流运输中的应用

化石燃料的迅速枯竭和环境问题正在推动能源结构向可再生能源进行过渡。目前,运输消耗的燃料主要来自化石能源,更强的运输需求对环境和气候有很大的威胁。氢燃料电池动力汽车使用氢能是化石燃料的清洁替代品。对氢燃料电池在国内最新的政策和市场应用情况进行总结,对其关键技术进行介绍,并对现有的应用场景进行分析,梳理其未来的发展趋势,为氢燃料电池动力汽车在物流运输行业的未来发展提供参考和指导。     

Machine-Part Cell Formation Problem Using a Group Based League Championship Algorithm

This article proposes a new algorithm for grouping problems that is a grouping version of league championship algorithm (GLCA). We compare the performance of GLCA with several well-known algorithms published in the present literature and select a set of 20 most widely used benchmarks of cell formation sample problems posing as a grouping problem. We used a truncated geometric algorithm to find the number of initial cells. Our computations reveal that GLCA can reach the best-known solution for 17 of the 20 benchmark problems, and improve the solution of three others with a 1.4% average gap.     

一次干电池中Hg对环境的污染及其处理方法分析

随着一次干电池消费量的日益扩大，其对环城的污染日益显现出来；从Hg污染的角度，分析了其迁移转化规律；提出了具有针对性的治理方案。     

宽带抗干扰通信系统的跳频同步研究及应用

本文分析了宽带抗干扰跳频通信系统的抗干扰性能，介绍了跳频同步的多种实现方法，提出了一种较好的组合同步方法，并对这种方法的实现原理作了较详细的论述。     

电动汽车所用牵引电池的性能简介与充电技术探讨

本文简要介绍电动汽车常用牵引电池的种类、特点和充电技术。     

基于单片机的多功能电子秤的设计

该设计以51系列单片机AT89S52为控制核心,实现电子秤的基本控制功能。为了更好利用AT89S52的资源,系统扩展了电子日历时钟模块及温度检测和语音报数的功能。整个系统结构简单,使用方便,功能齐全,精度高,具有一定的开发价值。     

Nanog在肿瘤细胞中表达的Meta分析

目的:研究Nanog蛋白在肿瘤细胞中表达的意义。方法:计算机检索Pub Med、Embase、Cochrane图书馆、CNKI、中国生物医学文献和万方数据库,检索时间均从建库到2014年5月,手工检索相关文献,收集Nanog在肿瘤细胞和正常细胞中表达的随机对照实验。对符合纳入标准的临床研究进行质量评价和资料提取后,采用Rev Man5.2软件进行Meta分析。结果:共纳入9篇原始文献,包括852例组织芯片(其中癌细胞组520例,正常细胞组332例)。Meta分析结果显示:癌细胞组中Nanog蛋白表达风险是正常细胞组的13.78(95%CI:9.60~19.77)倍。敏感性分析Z=14.24,P<0.00001,即分析结果稳定且不存在明显偏倚。结论:Nanog在肿瘤细胞中较正常细胞中显著高表达。