基于LQ系数的广州会展产业集群

文章运用区位商(Location Quotient,LQ)分析法和问卷调查法,对广州会展产业集群现状进行了测量,分析了广州会展产业集群的LQ系数,得出结论:广州会展产业集群已形成,有较高的集聚程度及一定的优势和特色,但也存在一些问题。同时提出了广州会展产业集群化发展的策略,藉此加快广州会展产业集群化发展的步伐。     

防沙治沙贵在综合 重在林业 关键在政府——《省级政府防沙治沙目标责任考核办法》析

2009年出台的《省级政府防沙治沙目标责任考核办法》,是我国继计划生育、保护1.2亿hm2耕地和节能减排后又一个对省级政府要进行量化考核的重要工作。论述了《办法》出台的必然性,归纳总结了《办法》的特点,阐述了《办法》的重要意义,提出了下一步具体实施还要提高认识、理清思路和明确责任。     

桥梁加固设计方案的技术经济评价研究

桥梁加固设计方案的选择既是一个技术问题,更是一个经济问题,目前还没有较为成熟和系统的方法。运用工程经济学的基本原理,对既有桥梁加固在其寿命周期内可能产生的各项费用进行了详细的对比分析,建立了桥梁技术改造的经济分析比选模型,提出了基于寿命周期成本的桥梁加固的经济评价方法。列举实例说明方案比选过程,由计算结果可知该方法能较准确地反映桥梁加固工程的经济效果,能够为既有桥梁改造方案的合理选择提供参考。     

Social Position and Behaviour: A Formalization

Modern society has witnessed anever-increasing development in the social sciences;partly due to changes in mentality, and partly due tothe growing requirements of the economic and political world – requirements which frequently takeon the guise of necessity, as for instance in thecases of market research and electoral opinion polls.Such development has produced an increasing paralleldemand for mathematical accuracy and exactitude inthese fields.The intention here is to rationalize the basic logicand methodology of the sociological procedure; anintention, it is hoped, which could be influential inimproving practical sociological work by rendering itmore comprehensible. This requires the employment offairly sophisticated mathematical and statisticalnotions.Section 1 outlines the definitions considered essential for the rationalization of the basiclogic framework previously described.Section 2 discusses the general concept of statisticalvariance. Section 3 introduces the notion of ``heterogeneity'and offers several propositions linked to this concept.Section 5 revolves around the notion of ``inaccuracy'.Section 6 presents a theorem relating to theimmersion of metric spaces in Banach spaces, andshows how the theorem can be used to constructtheoretically satisfactory immersion algorithms.Section 7 together with the material, which ispreviously introduced in Section 4, outlines thecluster analysis and the principal components methodologies.     

A Probabilistic Clustering Model for Variables of Mixed Type

This paper develops a probabilistic clustering model for mixeddata. The model allows analysis of variables of mixed type: thevariables may be nominal, ordinal and/or quantitative. The modelcontains the well-known models of latent class analysis as submodels.As in latent class analysis, local independence of the variables isassumed. The parameters of the model are estimated by the EMalgorithm. Test statistics and goodness-of-fit measures are proposedfor model selection. Two artificial data sets show the usefulness ofthese tests. An empirical example completes the presentation.     

Fuzzy Pair-wise Dominance and Implications for Technical Efficiency Performance Assessment

Classically, the concept of efficiency measurement is based on the definition of a frontier that envelops the observed production plans. The efficiency score itself is based on the distance of an observed production plan from this frontier. The frontier along with the required technological assumptions (such as convexity) needed for its definition may be replaced with the concept of pair-wise dominance. This concept leads to a classification scheme for all production plans instead of a ranking based on efficiency scores. Also, the traditional assumption of deterministic or crisp production plans may be substituted with the weaker assumption of fuzzy production plans as proposed by fuzzy set theory. This paper merges these two concepts and defines a new classification scheme based on fuzzy dominance.     

钢筋混凝土叠合梁的斜截面承载力灰关联分析

为了经济合理地设计叠合梁,应用灰色系统理论,对均布荷载下钢筋混凝土叠合梁的斜截面积承载力及其关联因素进行关联度分析。结果表明,对叠合梁斜截面承载力影响最大的是预制梁混凝土强度等级,其次是叠合层混凝土强度等级、叠合特征参数αｈ,影响最小的是叠合特征参数αｍ。     

浅析房地产项目环境影响评价中的公众参与

公众参与是环境影响评价的重要组成部分,本文针对房地产环评的特殊性,着重分析了房地产环评中公众参与存在的问题,并针对这些问题提出了几点提高公众参与效力的建议。     

关于城市污水处理的环境影响评价问题探讨

随着我国社会经济的不断发展,以及城市化进程的日益加快,城市生活废水的排放量日益增加,城市污水处理出现的问题也日益突出。本文对城市污水处理的环境影响评价问题进行了深入的分析和探讨。     

我国保险公估业的现状及发展对策分析

公估业的发展在保险市场中扮演着重要的角色,是我国保险业完善与发展的必然要求。但公估业在我国发展起步晚,且发展缓慢,因此需要我们正确分析保险公估发展前景的利弊,以确保公估业在我国健康发展。