基于矿区水文地质条件及含水层分布特征分析

本文对七台河东部某矿区进行了水文地质条件综合分析。就含水层和隔水层的分布,对第四系裂隙含水带,风化裂隙含水带,亚风化孔隙含水带,立新河第四系孔隙含水层,侏罗系含煤地层裂隙含水层,含水性较强的岩层,含水性中等岩层,含水性较弱的岩层等进行了规律与特征分析。     

水文地质条件在抽水蓄能电站的地下厂房的排水设计影响分析

水电站在建设地下厂房时,最重要的一块就是排水设计。而水文地质条件在排水设计中起着举足轻重的的地位,很多水电站周围的地质条件相当复杂,对排水设计的的影响也较为大。文章主要根据笔者前期勘测获得的相关资料,再加上一些实际考察经验,对地下厂房排水时设计时的水文地质条件进行深入的探讨分析,以提供相关经验供同类工程进行参考。     

曲靖越州盆地水文地质条件对煤系地层的影响

越州向斜(盆地)是曲靖地区主要的褐煤富集区,区内煤层主要位于新近系茨营组中,该地层含大量孔隙水。大气降水、地表的南盘江水系的江水和基岩承压水都会对含煤地层补给地下水。在未来的开采中应提前做好预防和防止工作,避免矿坑充水带来的危害。     

预结算管理在企业生产活动中的重要性

现代企业面临着激烈的市场竞争,在企业的生产活动的运行中,运用现代企业的管理方法,做好预结算管理,加强核算,降低成本,对全面提高企业管理水平,为企业取得更好的经营成果,提高企业经济效益,促进企业科学发展有着重要的意义。     

浅谈计量工作在企业生产活动中的作用

我们都知道,现代企业生产过程中。没有准确、一致、可靠的计量工作;组织科学、有效的生产和质量管理也是不可能的。所以,计量工作（包括测试、化验、分析等工作）是企业生产的重要环节,是保证零部件具有互换性和产品质量的重要手段和方法。     

浅谈计量工作在企业生产活动中的作用

我们都知道。现代企业生产过程中,没有准确、一致、可靠的计量工作;组织科学、有效的生产和质量管理也是不可能的。所以,计量工作（包括测试、化验、分析等工作）是企业生产的重要环节,是保证零部件具有互换性和产品质量的重要手段和方法。     

生产环境不确定条件下的生产调度优化

生产调度是企业生产运营的指挥中心,提高生产调度质量与效率对提高企业社会效益与经济效益有着积极意义.所以,加大生产调度研究力度是十分重要的,具有非常重要的理论价值与现实意义.本文在分析生产环境不确定性因素的基础上,阐述生产调度的优化方法.     

活动工期下造船单件小批生产单元成本控制研究

为解决当前造船企业生产计划频繁调整导致工期不确定性及资源占用的不均衡性,从而引起制造成本增加突出的问题,文章针对船舶制造边设计边生产的特点,以单件小批生产单元制造成本控制为研究对象,构建活动工期下的满足目标分解成本与制造资源可扩充但有代价情形下的造船单件小批生产单元制造环节的成本控制模型,运用遗传算法对该模型求解,以国内某船厂生产单元为例进行计算和分析。结果表明,该方法能够有效寻找活动工期、目标成本与资源可扩充条件下的单件小批生产单元作业安排,实现制造环节的动态成本监控,为造船企业提升成本管控水平、实现准时化生产提供决策参考。     

第四系含水层下煤层开采水文工程地质条件研究与应用

根据松散含水层富水性,合理留设浅部工作面的露头安全保护煤岩柱,可解放大量浅部压煤,延长矿井服务年限,提高资源回收率,缓解工作面接续,有显著的社会和经济效益。     

Joint estimation of technical efficiency and production risk for multi-output banks under a panel data cost frontier model

This article generalizes production risk from a single output production function to a multiple output cost frontier, which is able to examine input-oriented technical efficiencies and production risk simultaneously in the context of a panel data. Furthermore, the joint confidence interval estimates for technical efficiencies are constructed by means of multiple comparisons with the best approach. Whether taking production risk into account or not offers quite dissimilar implications in terms of the average technical efficiency measure and the identification of multiple efficient banks achieving the optimal cost frontier. It is suggested that inferences drawn on the basis of the confidence intervals of technical efficiency provide much more fruitful and insightful information than the point estimation alone. Bank specific risk parameters are found to be highly and positively correlated with fixed-effect estimates, implying that the more risk-averse a bank is, the more technically efficient it will be.

福建龙岩罗厝山煤矿突水机理分析

龙岩罗厝山煤矿+435m水平平硐39煤层南运输巷迎头灰岩1999年发生了数次水量不等的突水事件,文章科学分析灰岩突水现象,结合有关资料,借助设置突水水文地质模型,尝试解释突水机理,为今后有针对性地制定井下防治水方案提供理论参考依据。     

Manipulation of the Walrasian mechanism in production economies with unbounded short-selling

Hurwicz (1979) and Otani and Sicilian (1982, 1990) characterized the Nash equilibrium allocations of the Walrasian demand manipulation game in successively more general exchange environments. In this paper, I extend the analysis to production economies with short-selling. First, I generalize Hurwicz’s and Otani and Sicilian’s theorem that any allocation at which each agent’s consumption bundle lies above her true offer curve can be supported in Nash equilibrium. I then show that for finite economies of any size the set of such allocations is often topologically large.Received: 17 January 2003, Accepted: 4 April 2005, JEL Classification: D51, D82For comments on this and earlier versions of the paper, I wish to thank Rick Bond, Bhaskar Chakravorti, Tom Gresik, Costas Syropoulos and William Thomson. I would especially like to thank Mike Jerison for helping to overcome a difficulty with a previous version. Also, the comments of the anonymous referees are gratefully acknowledged.     

Revisiting the theory of production competence: Extensions and cross-validations

This paper examines a widely cited work in operations management, the theory of production competence, advanced initially by Cleveland, Schroeder, and Anderson (CSA). This intuitively appealing proposition asserts that production competence leads to improved business performance. However, CSA's empirical work has been criticized by Vickery and her collaborators and by Safizadeh, Ritzman, and Mallick (SRM). Moreover, SRM's own empirical work suggested that the CSA proposition only holds for batch processes. Using data from two large studies, we avoid the problems that plagued CSA's analysis, improve on their result, and call into question the SRM finding that restricts that result to batch operations.     

以政府为主导提供节事活动旅游公共服务

旅游节事活动作为旅游业的重要组成部分日益显示出对举办地经济社会发展的促进作用.国内重大节事活动成功的旅游公共服务案例给我们提供了许多经验启示.为促进旅游节事活动的健康可持续发展,政府应切实做好节事活动的旅游公共服务工作.     

A discussion on the factor of technological change in production function

The purpose of this paper is to discuss the factor of Technological Change (innovation) in terms of CROPPES (Constant Ratio of Pairwise Partial Elasticities of Substitution) Production function, and classical price theory model.

---

Riassunto Scopo del presente lavoro è quello di discutere il fattore di innovazione tecnological nell'ambito delle funzioni di produzione del tipo C.R.O.P.P.E.S. e del modello classico della teoria dei prezzi.

     

“阳光体育运动”背景下陕西省大学生课外体育活动特征研究

运用文献资料法、问卷调查法、访谈法、数理统计法、比较分析法等方法,对陕西省大学生在阳光体育运动启动后,课外体育活动的参与状况进行了调查和分析,为陕西省高校落实《大学生体质健康标准》和阳光体育活动、推动西部学校体育的研究与开发提供理论参考。     

Production in advance versus production to order: The role of downstream spatial clustering and product differentiation

In every production process, suppliers have to decide whether an item should be produced and stored as inventory before an explicit purchase order is received (production in advance), or whether it should be produced only after such an order is received (production to order). We study the determinants of this firm-level choice. We present a simple conceptual framework to derive predictions that we subsequently test in the empirical analysis. We argue that an increment in buyers’ spatial concentration benefits production in advance more in homogenous industries than in differentiated ones, while the benefits for production to order are larger as product differentiation increases. Consequently, the propensity to adopt one of the two production modes, following an increase in the number of local downstream buyers, changes according to the degree of product differentiation of the goods. Relying on a large data set of Italian manufacturing firms, we find empirical support to our ideas.     

对称四极电测深法在九寨沟县沙坝村找水工作中的应用

九寨沟县地区地下水资源丰富,自2008年汶川地震以来,受地震影响,多处存在山体滑坡和泥石流灾害,导致地表水源被滑坡体覆盖,地表水常年浑浊,难以满足山区日常用水需求。因此,在当地打井取水成了目前必要的工作。本次工作的任务是:配合传统地质勘查手段查明工作区内地下的含水层,储水层、储水点的分布、埋深、位置和地下水位情况,为布钻打井提供重要依据。结合工区地质情况、实际环境及工作任务综合分析,确定采用对称四极电测深法在工作区内进行勘探。通过对该区的勘探,基本查明了其地下水的含水层,储水层的分布、埋深等情况,为后续的布钻打井提供了重要的地球物理依据。