联合支护巷修技术在大断面巷道牛鼻子交岔点的应用

由于受22地区采面采动的影响,冯营公司三号交岔点134米至188.5米,以及东绕道25米、东西通道17米,大部分碹体顶破裂、掉渣严重,传统的方法只能是架设U型钢支护,这样做不但消耗大量的人力、物力、而且效果也不佳。在U型钢支架与金属网的基础上通过喷浆注浆来提高围岩的整体性,并且通过对牛鼻子施行加固工艺,来达到减轻巷道破坏程度的目的,保证了支护质量,确定了施工工艺、支护方式和支护参数,取得了良好的支护效果。     

底板巷穿层钻孔在煤巷掘进中的应用

随着国内煤矿开采技术的不断提高,如何提高开采量及提高开采的效率问题摆在我们面前,随着国家提出了"可保尽保,应抽尽抽"的战略方针,在这个战略方针的指导下,国内各大型煤矿对原煤的开采技术进行了技术挖潜和技术革新,研制成了底板巷穿层钻孔技术,该项技术对煤巷掘进过程中,煤瓦斯突抽放的效果显著,确保矿井的稳产、高产及安全生产。     

江南水乡古镇区生活污水收集与管道敷设问题探讨

分析了水乡古镇民居的特点,调查了典型古镇区的排水现状。结合工程实例,给出了古民居的管线走向及污水支管、干管的规划布置方式,并详细介绍了污水干管、合建式泵站、过河管的施工方法。     

Ex post implementation

We analyze the problem of fully implementing a social choice set in ex post equilibrium. We identify an ex post monotonicity condition that is necessary and—in economic environments—sufficient for full implementation in ex post equilibrium. We also identify an ex post monotonicity no veto condition that is sufficient. Ex post monotonicity is satisfied in all single crossing environments with strict ex post incentive constraints.We show by means of two classic examples that ex post monotonicity does not imply nor is it implied by Maskin monotonicity. The single unit auction with interdependent valuations is shown to satisfy ex post monotonicity but not Maskin monotonicity. We further describe a Pareto correspondence that fails ex post monotonicity but satisfies Maskin monotonicity.     

公伯峡水电站调速器的交叉冗余实现方案

介绍了公伯峡水电站（5×300MW）微机调速器的交叉冗余实现方案、双机切换原则和切换方法，同时指出了双可编程逻辑控制器（PLC）微机调速器在国内大型、巨型水轮发电机组上运行的可行性。     

天然气管道穿越工程的防洪分析

结合保定天然气管道穿越漕河建设项目,对定向钻穿越工程的防洪评价要点进行分析,并提出可行的防治与补救措施建议,为项目审批和建设提供科学依据。     

Efficiency of Chinese Enterprises

This paper compares the efficiencies across firm ownership types in China. Empirical results show that the non-state-owned enterprises are more efficient than the state-owned enterprises, which provides evidence to support the continued shifting of industry structure from state-owned enterprises to non-state-owned enterprises. Also, the economic gap between the western and coastal regions are found to be related to the variations of performances of ownership types in these regions. In addition, the issue of crossing frontiers and two interesting features of the Byrnes (1985) technique on the separation of across-group and within-group technical efficiency measures are evaluated.     

Difference in rural and urban driver-injury severities in highway–rail grade crossing accidents

Based on the Federal Railway Administration (FRA) database, there were 25,945 highway–rail crossing accidents in the United States between 2002 and 2011. With an extensive research, analysis results showed that there were substantial differences between rural and urban areas at highway–rail grade crossings. However, there is no published study specific on driver's injury severity at highway–rail grade crossings classified by area types. Using an ordered probit modelling approach, the study explores the determinants of driver-injury severity at rural highway–rail grade crossings compared with urban highway–rail grade crossings. The analysis found that motor vehicle driver's injury level at rural highway–rail grade crossing is extremely higher than urban area. Compared to collisions at urban area, collisions happened at rural area tend to result in more severe injuries. These crashes were more prevalent if vehicle drivers are driving at a high speed or the oncoming trains are high-speed. Moreover, highway–rail grade crossing accidents were more likely to occur at rural area without pavement and lighting.     

商业银行公司金融产品组合营销深化研究

我国商业银行的竞争模式正在从简单的产品扩张向提供深入服务的方向转化,对组合营销这种有效的竞争手段的深化将大大有利于商业银行提升营销层次,提高自身竞争力。作者在总结分析的基础上,提出了公司金融产品进行组合营销深化的基本理念、基本方法和基本策略,以及基于RAROC的组合营销风险考虑方法。本文在分析了阻碍我国商业银行进行组合营销深化的基本因素后,对进一步实施组合营销的深化提出了建议。     

南水北调中线一期工程穿黄方案的论证与选择

穿黄工程是南水北调中线一期工程的关键性控制工程。本文阐述了穿黄工程方案有关河势与路线、结构与施工、水头与水量、地质地震与地基、安全与维护及环境景观等主要关键技术的论证，在充分论证分析的基础上，阐述了穿黄线路、过河建筑物型式选择的决策方法。在此基础上选取主要影响因素，采用多目标优序值决策法的赋权优序值计算方法，对多目标的穿黄方案进行决策支持分析，依据各方案比选设计排序在先的遴选原则，提出了穿黄工程线路采用李村线、过河建筑物型式采用隧洞方案的建设性意见。