未确知有理数的定义运算及其应用

本文给出未确知有理数的定义、运算。并把它应用到煤矿立井建设中,为矿井施工管理提供了可靠的数学处理方法。     

电网企业优化购电成本方法研究与实证分析

通过购电成本结构分析,指出了当前发电计划编制及执行中存在的问题和当前发电计划编制对电网购电费的影响。重点研究了有关降低电网购电成本的方法及实证,并为政府价格相关部门提出创建节能型社会的政策建议。     

The Impact of Basel II on Lending to Small- and Medium-Sized Firms: A Regulatory Policy Assessment Based on Spanish Credit Register Data

The objective of this paper is to evaluate the impact on bank credit exposures to small- and medium-sized Spanish firms of the current proposal for reform of the 1988 Capital Accord using information from the Spanish Credit Register. Capital requirements for exposures to those firms, according to the various revisions of the proposed capital reform (from the January 2001 consultative document to the April 2003 one), are calculated to analyze whether the existing pattern of bank financing of small- and medium-sized firms might be altered. Finally, the incentives for individual banks to adopt the advanced internal ratings-based approach proposed by Basel II are evaluated.     

潜油电泵泵轴寿命可靠性分析

统计了大庆油田近五年应用的4123套潜油电泵机组，针对248件失效泵轴的寿命进行分布检验分析，验证了其符合威布尔分布规律,并进行了可靠性评定。应用编制的工程软件可计算不同样本下泵轴寿命的概率分布规律，确定其可靠性指标，实现对泵轴使用可靠性的定性分析和定量评定，为进一步开展潜油电泵机组可靠性研究提供必要的基础数据和数据处理手段。     

关于输配电价几个重要问题的探讨

我国电力企业将要由传统的垂直垄断的模式转变为网厂分开、竞价上网的模式。电网公司作为一个独立的经营实体分离开来,有着独立的收益需求。在市场运营过程中,通过输配电价取得收益就成了电网公司取得收益的主要手段。在输配电价的制订过程之中,管制方式、输配电成本、输电定价方法、价格水平及电网投资、输配电价价区、电网提供的辅助服务等六个问题十分重要。文中就这六个问题的解决作了一些有价值的探讨。     

慎重看待大用户直供电问题

论述了在电力市场初期我国缺少实施大用户直供电所必须具备的若干条件,分析了当前开展大用户直供电存在的问题及可能造成的影响,指出开展直供是改革的趋势但不可急于求成.     

Spatial patterns of poverty in Vietnam and their implications for policy

This study examines the geographic distribution of poverty in Vietnam by applying small area estimation methods to household budget data and population census data. The resulting district-level poverty estimates suggest that the incidence of poverty is highest in the remote northern and central highlands and lowest in the south-east and in large urban centres. However, mapping the density of poverty reveals that most poor people do not live in the poorest districts but in the two lowland deltas, where poverty incidence is intermediate. The policy implications of these findings present an important trade-off between targeting poor areas and poor people that can only be resolved with better information on the relative costs of delivering different programmes and their expected impact. Existing government estimates of poverty at the district level are not closely correlated with our poverty estimates, perhaps because of regional variation in their methods of collecting poverty data.     

闽侯县闲置农地生态安全评价研究

[目的]根据闽侯县农用地闲置情况,结合当地社会经济及生态环境发展情况,深入分析闽侯县闲置农地的生态安全发展水平。[方法]建立闽侯县闲置农地生态安全评价指标体系,分别从农村垃圾处理点数量、财政支农资金、外部进入农村投资、农业生产总值、种粮补贴、自然灾害、农业技术水平、农村生物的多样性程度、农村家庭收入结构、农村生态补偿金额、农地的整理规模及环保支出占GDP比重共确定12个指标进行深入研究,运用普通最小二乘法对设计的多元线性回归模型进行回归,进一步对闽侯县闲置农地的生态安全水平进行评价。[结果]农村垃圾处理点数量、财政支农资金、种粮补贴、环保支出占GDP比重、生态补偿金额、生物多样性程度对闽侯县闲置农地生态安全水平起到促进作用,呈正相关趋势;自然灾害则与闲置农地生态安全水平呈负相关趋势。[结论]整体看来,闽侯县闲置农地的生态安全水平主要受到当地经济、环境及生态基础三大因素的影响。     

江西省耕地后备资源潜力分布及开发组合序列分析

[目的]根据耕地后备资源的分布特征研究其开发组合序列是有效开发利用耕地后备资源、补充耕地的重要前提。文章利用江西省耕地后备资源调查评价成果,以县为分级单元对全省耕地后备资源进行开发潜力分级,对江西省耕地后备资源开发组合序列进行研究,从而为江西省耕地后备资源的开发顺序提供参考。[方法]利用Arc GIS空间图形分析法、DPS数据处理系统两维图论聚类等方法确定开发潜力等级以及开发序列。[结果]江西省耕地后备资源开发潜力从高到底依次分为Ⅰ级潜力区、Ⅱ级潜力区、Ⅲ级潜力区和Ⅳ级潜力区,面积分别为2.726 672万hm~2、2.306 897万hm~2、2.873 594万hm~2、1.378 88万hm~2。[结论]根据两维图论聚类法分析结果得知,江西省各县地域相似程度较高可优先开发的组合有进贤县-南昌县-余干县-鄱阳县-彭泽县;袁州区-分宜县-上高县-渝水区-樟树市;进贤县-南昌县-余干县-鄱阳县-都昌县和樟树市-渝水区-上高县-高安市-奉新县-安义县-永修县等。