竞争情报是企业自主创新中的重要元素

论述了竞争情报作为企业自主创新中的重要元素,在企业决策创新、技术创新、管理创新中发挥的重要支撑作用.阐述了企业自主创新建设对竞争情报机构的需求,介绍了企业竞争情报研究的组织结构、工作流程、人员分工及系统构成,分析了我国钢铁企业自主创新面临的主要问题,指出了我国钢铁企业情报机构为促进自主创新做贡献的主要途径及自身的建设发展方向.     

马克思主义政治经济学教育的探索

当前马克思主义政治经济学教育面临着诸多的挑战和困惑,由此影响到教学效果,而人本思想在该课程教育中的贯穿将有助于改变这种状况。     

WHOSE GAY COMMUNITY? SOCIAL CLASS,SEXUAL SELF‐EXPRESSION,AND GAY COMMUNITY INVOLVEMENT

The visible and political gay community has been characterized as an increasingly middle-class, white institution. It is hypothesized that this middle-class nature requires economic and psychosocial resources that are not available to the working class and, thus, may limit the expression of sexual orientation for the working class. An analysis of data from the multicity Urban Men's Health Study supports this hypothesis. Nine of 14 hypothesized effects are statistically significant and indicate that working-class men who are homosexually active are less likely to describe themselves as gay, are more likely to have heterosexual experience, and are less likely to be involved in the gay community. Thus, it is important to incorporate class differences when addressing the social and the political dynamics of sexual orientation.     

运河文化的特质及其对当前经济社会发展的启示

运河文化属带状型地域文化,其特质属商业文化。认定此点的依据有三:一是运河贯通带动商贸发展,增加官府税收;二是促进城镇经济的发展;三是打破封闭的农业自然经济,孕育资本主义的萌芽,推动中外经济和文化交流。考察运河文化的兴衰,留给我们的启示很多:从其与当时占主导地位的农业文明关系看,二者并非绝对排斥,可以融合。在社会主义初级阶段,不能简单地对尚有很强生命力和发展空间的农业文明一概排斥,应以商改农,抓住机遇,扩大交流;从其与城市建设角度说,应延续历史文脉,注意保护和发展的关系,既遵循规律又要考虑超越式发展,提升城市文化品位;从其与区域经济发展看,一是区域经济发展既需外力,更需内力;二是应以旅游带动商贸;三是抓南水北调机遇,未雨绸缪,选准切入点和突破口。     

Semi-parametric estimation of ROC curves based on binomial regression modelling

This paper presents a method of estimating a receiver operating characteristic (ROC) curve when the underlying diagnostic variable X is continuous and fully observed. The new method is based on modelling the probability of response given X , rather than the distribution of X given response. The method offers advantages in modelling flexibility and computational simplicity. The resulting ROC curve estimates are semi-parametric and can, in principle, take an infinite variety of shapes. Moreover, model selection can be based on standard methods within the binomial regression framework. Statistical accuracy of the curve estimate is provided by a simply implemented bootstrap approach.     

Improving flexibility and efficiency by adding parallelism to genetic algorithms

In this paper we develop a study on several types of parallel genetic algorithms (PGAs). Our motivation is to bring some uniformity to the proposal, comparison, and knowledge exchange among the traditionally opposite kinds of serial and parallel GAs. We comparatively analyze the properties of steady-state, generational, and cellular genetic algorithms. Afterwards, this study is extended to consider a distributed model consisting in a ring of GA islands. The analyzed features are the time complexity, selection pressure, schema processing rates, efficacy in finding an optimum, efficiency, speedup, and resistance to scalability. Besides that, we briefly discuss how the migration policy affects the search. Also, some of the search properties of cellular GAs are investigated. The selected benchmark is a representative subset of problems containing real world difficulties. We often conclude that parallel GAs are numerically better and faster than equivalent sequential GAs. Our aim is to shed some light on the advantages and drawbacks of various sequential and parallel GAs to help researchers using them in the very diverse application fields of the evolutionary computation.     

硼酸基钝化剂钝化柳钢焦炭的试验研究

通过实验室和工业试验,研究了以硼酸基为主的钝化剂的钝化性能,以及钝化后焦炭的热反应性和热反应后强度的变化.在工业试验中充分证明了以硼酸基为主的钝化剂能够大幅度提高焦炭的热性能.     

解码理论在日语听力理解中的运用

在日语学习中,因受语言环境和学习方法的限制,听力被认为是提高日语水平和成绩的一大难关。作者遵循听觉系统中听力的解码理论,以一年一度的国际日本语能力测试题为例,提出并具体分析了提高日语听力的三种模式———预测法、捕捉法和贯穿法,并指出运用这些技巧时应注意的几个问题。期望学习者能克服心理障碍,讲究科学的方法,把这些模式积极运用到平时的训练和测试中去,以此来提高日语听力水平和成绩。