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Based on the analyses of the physical and mechanical properties of ore/rock and the behavior of ground stress field in the deep deposit of Fankou Lead-zinc Mine, the authors researched the unloading measures to prevent and control rock burst in mining the
中文意思:
根据凡口铅锌矿深部矿岩体的物理力学性质及地应力场特性,对凡口矿深部矿床开采的岩爆防治措施进行了研究,并应用三维弹塑性有限元程序对各种防治措施引起的应力分布进行了数值模拟分析,以期为凡口铅锌矿深部矿床开采的岩爆控制提供决策依据。


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Based on the analyses of pricing process, cost determination philosophy and pricing method at each phase of engineering construction, this paper summarizes the experience of engineering cost control in three aspects: (1) design phase is a key phase of eng 文章在分析工程建设各个阶段计价过程以及各个阶段造价确定依据、定价方法的基础上,从3个方面总结了工程造价控制的经验:(1)设计阶段是工程造价控制的关键阶段;(2)技术与经济相结合是工程造价控制的最有效手段;(3)工程项目全过程的合同管理是工程造价控制的重要内容。
Based on the analyses of structural features, volcanic activities, sequence construction and so on, It is believed that Liaohe Basin has experienced the period of dextral transtensional stress field in Late Jurassic-Early Cretaceous, Middle and Late Paleo 对构造现象、火山活动、层序充填型式等多种实际资料的分析表明:辽河盆地经历了侏罗纪末-白垩纪早期、古新世中后期、始新世中后期、中新世等右旋张扭应力场作用阶段,以及白垩纪晚期、古新世初期、始新世早中期、渐新世、上新世以来等左旋压旋应力场作用阶段。
Based on the analyses of the diversity of shape and structure of tarsometatarsus of living birds and its corresponding function, we can study the shape and habit of birds in the early stages, at the same time can discuss the evolutive law of functional be 特别是通过对现生鸟类跗跖骨形态结构多样性与对应功能的分析,可以此作为研究早期鸟类形态习性的参考依据,同时也可进一步探讨不同地质历史时期鸟类功能行为的演化规律。
Based on the analyses of the flow and sediment characteristics and evolution trend of the river bed of the Fuling reach in the Yangtze River before and after the impoundment of the Three Gorges Reservoir, the water level, velocity variation and influenced 摘要在分析长江涪陵段的水沙特性和三峡水库蓄水前后该河段河床演变趋势的基础上,运用二维水流数学模型,分析了4种流量组合情况下在三峡水库运用前和运用50年,涪陵港区码头修建前后的水位、流速变化及其影响范围。
Based on the analyses of the investment of nozzle tube net and relationship between the annual operation cost and tube diameter function of a fixed spray irrigation system, a mathematic model to calculate the economical tube diameter of a spray irrigation 摘要在分析了固定式喷灌系统的管网投资、年运行费用与管径函数关系的基础上,利用工程经济分析中费用最小化准则和非线性规划理论,建立了求解喷灌系统管网经济管径的数学模型,并给出了无约束条件直接求解经济管径的计算式。
Based on the analyses of the physical and mechanical properties of ore/rock and the behavior of ground stress field in the deep deposit of Fankou Lead-zinc Mine, the authors researched the unloading measures to prevent and control rock burst in mining the 根据凡口铅锌矿深部矿岩体的物理力学性质及地应力场特性,对凡口矿深部矿床开采的岩爆防治措施进行了研究,并应用三维弹塑性有限元程序对各种防治措施引起的应力分布进行了数值模拟分析,以期为凡口铅锌矿深部矿床开采的岩爆控制提供决策依据。
Based on the analyses of the problems mainly existing in public accumulation fund for housing construction loaning, this article tries to propose solutions to the problems in the three aspects, that is, expanding the source of public accumulation fund for 文章分析了我国住房公积金制度运行现状,基于我国实践和国际经验,从积极拓宽公积金资金来源、创新我国公积金运作模式、建立健全公积金风险防范体系等三个方面提出解决问题的对策。
Based on the analyses on the present situation of the energy and the biomass energy in China today,this paper points out the necessity and probability of developing the biomass energy strongly in China when the energy resource in short supply and environm 基于对我国能源现状和生物质能的分析,提出在能源紧缺和环境污染成为制约我国发展的重要问题的时候,我国大力发展生物质能的必要性与可能性。
Based on the analyses, the paper discusses countermeasures like marketing of property rights, external subsidizing to comprehensive utilization, internalization of external costs, and the rational discount rates so as to improve the evaluation measures of 在此基础上,探讨了产权市场化、对综合利用实施外部补贴、社会成本内部化和压缩贴现率等措施,调整矿产资源开发思路以实现矿产资源开发利用的可持续性。
Based on the analysis a mixed flow model and a generalized appoximate formula are presented. 理论公式与各类实验公式比较指出了这些公式的共同缺陷和相互间不能统一的原因。
Based on the analysis about the influences of the mixing time, the penetration ratio of injected powder and the residence time of injected powder in the bath on the desulphurization process, a mathematical model which taken these three parameters into acc 在具体分析熔池均混时间、粉剂穿透比及粉剂停留时间这3个基本参数对脱硫过程影响的基础上,建立了能体现这3个参数影响的模拟铁水喷吹镁粒和碳化钙复合粉剂脱硫处理的数学模型,并讨论了两种粉剂在脱硫过程中的耦合效果。
 
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