托巴水电站古松料场开采运输方案研究

溜井运输方案在国内外的冶金、煤炭、建材等行业已被广泛采用,并在设计、运行方面取得了较为成功的经验,在国内龙滩、锦屏等水电工程的料场开采运输中也得到了成功的运用。托巴水电工程古松料场地形陡峻,开采边坡高约300m,开采运输道路修建困难,且距坝区较近,对坝区施工干扰较大。通过对"公路运输方案、溜井+公路运输方案、溜井+胶带机运输方案"3个开采运输方案进行比较,初步推荐采用"溜井+公路运输方案",以有效解决料场开采运输存在的问题。     

Targeting Financial Management Training at Low‐Income Audiences

While interest in financial management training programs for low‐income persons has grown in recent years, the specific training needs of low‐income consumers have not been well articulated. This article describes needed training content for such audiences, based on review of previous research and the authors’ experiences in evaluating the Financial Links for Low‐Income People (FLLIP) program. We also illustrate how the choice of financial management training models can seriously impact the subgroups of the low‐income population who attend training, as well as the success of programs in recruiting and graduating participants. The implications of these findings both for financial management curriculum development and for the selection of program models are presented.     

空气动力学标准体系研究初探

标准体系建设对规范行业发展和提升工程产品质量具有重要意义。文章简要分析研究了欧、美空气动力学标准体系,介绍了我国空气动力标准发展现状,提出了构建我国空气动力学标准体系的初步设想。     

NUMERICAL INVESTIGATION OF FLOW PATTERNS IN DIFFERENT PUMP INTAKE SYSTEMS

A 3-D numerical model for pump intake is established based on the Navier-Stokes equations with the RNG turbulence model and the VOF method to simulate the free surface.The applicability of the proposed model is validated by a test case of non-symmetric pump-intake bay.The predicted locations,structures and shapes of all vortices are in good agreement with those observed in experiments,though with some differences in vorticity strengths.The flow pattern and the efficiency of five types of pump intake systems are studied.The discharge and the velocity uniformity of the intake system are used as indices to evaluate its performance.     

粘性泥石流掺气减阻作用初探——云南东川蒋家沟泥石流

根据野外泥石流观测资料 ,分析了泥石流掺气与降粘减阻现象 ,建立了泥石流掺气量与流速的经验公式 ,并根据泥浆掺气降粘减阻的试验 ,揭示了泥石流掺气降粘减阻机理 ,提出了泥石流屈服应力与气体含量及固体浓度的经验公式。本文对解释泥石流减阻 ,预估泥石流流变特性有重要意义。     

飞来峡水电厂机组停机状态跳闸故障的分析及处理

针对飞来峡水电厂近期4台机组在停机状态下多次出现跳闸信号、转速报蠕动信号、电调跳闸信号,以及机组轴承油系统应急响应的现象,展开了试验调查分析,提出了防范措施和解决办法,取得了良好效果。     

官地水电站大坝碾压混凝土抗冻性能试验研究

结合官地水电站的实际,对大坝碾压混凝土的抗冻性能进行的试验研究结果表明:在大坝碾压混凝土中掺用6.0/万的引气剂,使得碾压混凝土的含气量为2.5%-3.0%时,大坝碾压混凝土的抗冻等级可以满足F50-F100的设计要求.     

FORCES ON A NEAR-WALL CIRCULAR CYLINDER

NOMENCLATURECD ———dragcoefficient ,drag/(ρV∞2 DL/2 )CL ———liftcoefficient ,lift/(ρV∞2 DL/2 )Cp ———pressurecoefficient ,(P- ρ∞) /(1/2 ρV∞2 )D———diameterofcircularcylinderinmetersG———gapbetweencircularcylinderandflatplateinmeterG/D———ratioofthe gapbetweencircularcylinderandflatplatetothediameterofthecircu larcylinderL———lengthofcircularcylinderinmetersP———measuredstationarypressureinpasP∞ ———pressureoffreestreaminpasRe———Reynoldsnumber ,Re=V∞ …     

产业集群的人才集聚机制研究

在产业集群的经济增长作用日益突出的今天,集群内的人才集聚现象也越来越受到学者们的关注。文章基于成本收益理论以及人口迁移中的“推－拉理论”等,对产业集群作用下的人才集聚现象进行了分析,并进一步阐述了产业集群内的产业链与人才链的耦合效应以及产业集群生命周期阶段人才集聚的演化过程,得出由于在产业集群的外部经济效应和知识溢出效应等自身诸多特征的作用下人才集聚得以实现,并且产业集群生命周期的不同阶段人才集聚对经济的贡献是有所差异的基本结论。这一结论将会给地方政府在制定区域人才开发政策时提供不同的视角,以便有针对性地遵循产业生命周期阶段来进行人才结构的调整与升级,保证人才集聚的持续性与区域经济的可持续发展。     

全面践行群众路线提高社会治理能力

群众路线是党的生命线,也是提高我国社会治理能力的重要法宝.分析了当前我国社会治理领域存在的问题和原因,并从密切联系群众的角度提出了相应的对策建议,以期对新时期提高社会治理能力有所裨益.