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 principle and method 原理与方法(392)
 原理与方法
 ON THE PRINCIPLE AND METHOD OF LAKE WATER ENVIRONMENT PREDICTION 湖泊水环境预测的原理与方法 短句来源 After the description of its principle and method, the hybrid model of displacement moniting for Shangyoujiang hollow gravity dam is established in this paper. 文章首先简要阐述建立大坝位移混合模型的原理与方法,据此建立上犹江大坝位移的混合模型. 短句来源 Basing on the principle and method of analogical and gray correlation analytic, this thesis put forward a method of comprehensive analogy evaluation of embankment bank slope. 基于工程类比和灰关联分析原理与方法，本文提出了堤防工程的综合类比评价方法。 短句来源 Firstly,Based on probability statistics and the reliability theory , in view of the characteristics of the earth-rock dam,this paper has elaborated the principle and method of the reliability analysis of soil slopes systematically , emphatically discussed the statistic method and characteristics of shearing strength of the dam material ,has concluded that Direct method should be adopted in the statistic of shearing strength of the dam material. 本文首先基于概率统计和可靠度理论，针对土石坝工程的特点，系统地阐述了土石坝坝坡可靠度分析的原理与方法、重点研究探讨了土石坝土料抗剪强度参数的统计方法和统计特性，得出应采用直接法进行土料抗剪强度参数统计的结论； 短句来源 The characteristies of air cushion surge chamber are described in this paper,and the principle and method of design are introduced. 本文阐述了气垫式调压室的特点，介绍了其设计原理与方法。 短句来源 更多
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 Design principle and Method of Comprehensive Control of Chamber Blast in Quarry for Rockfill Dam 综合控制硐室爆破的原理及其在坝料开采中的应用 短句来源 The computation principle and method, parameter selection, load determination and boundary condition treatment are given. 给出了计算原理、计算方法、参数选取、荷载确定和边界条件的处理,并对太平驿水电站防渗墙进行了计算。 短句来源 In this thesis, the modeling principle and method for Gray-BP model and BP-Residual model are presented too. 同时，本文还提出了灰色-BP模型、BP残差模型的建模方法与思路。 短句来源 Based on analysis of ecological environment characteristics and essential problems in the karst mountain region of the northwest Hunan province, eco-agriculture construction of a case that is representative example of eco-agriculture construction only depending on rainwater and county scale are researched respectively in Cili county by applying ecology principle and method of system. 在从整体上了解和认识湘西北岩溶山区的基本特征及存在问题的基础上，选取位于该区域内的全国生态农业建设试点县—慈利县作为研究基点，应用生态学原理与系统分析的方法对当地一个雨养生态农业建设典型与县级区域生态农业建设进行了研究。 短句来源 The principle and method in this poper can be extended to other parameters optimisation of the powerhouses. 其原理也可用于优选设置其它型式调压室的电站引水系统参数。 短句来源 更多

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 principle and method
 Principle and method of kinetic microphotometric enzyme activity determination in situ A systematic analysis and processing of the relation between the fault deformation network in the Beijing-Tianjin area and earthquakes by part of the principle and method of system science (Information theory) is reported in this paper. This paper reviews the development history and application status of high frequency wave radar, introduces its remote-sensing principle and method to inverse offshore fluid, and wave and wind field. The constitutional principle and method of the new evaluation method were given and its feasibility and effectiveness were proved by the practical example. The principle and method of GPR for cracks investigation of tunnel lining were expounded. 更多
 The theory of equilibrium of rigid bodies is familiar for analysis on stability of an arch dam abutment, But solution of its non-linear system of equations is complicated, and sometimes negative normal push forces occur on some slides. This is non-conformable to practice. In this paper, the principles and methods of solution of the non-linear system of equations of equal K value method,based on the theory of equilibrium of rigid bodies by means of method of optimization, are described. When... The theory of equilibrium of rigid bodies is familiar for analysis on stability of an arch dam abutment, But solution of its non-linear system of equations is complicated, and sometimes negative normal push forces occur on some slides. This is non-conformable to practice. In this paper, the principles and methods of solution of the non-linear system of equations of equal K value method,based on the theory of equilibrium of rigid bodies by means of method of optimization, are described. When negative normal push forces occur on some lateral slides,directions of shears on underside will be adjusted to destroy negative values. Result of comparing the calculation by means of this program with that by three-dimensional non-linear F. E. M. has proved that this method is feasible. 在拱坝坝肩稳定分析中经常使用刚体极限平衡法。但是,它的非线性方程组求解复杂,且有时某滑动面出现负的法向反力,这是与实际不符合的。本文论述了利用最优化方法求解刚体极限平衡等K值法的非线性方程组的原理和方法。并且,当有的侧滑面出现负值时,调整底滑面的剪力方向以消除负值。将这种方法的计算成果和非线性三维有限元计算成果进行比较,结果表明,这种调整方法是可行的。 The total process in static and dynamic characteristic tests of water turbine governor consist of the operation, measurement, data treatment, numerical approximating, choice of specific points, calculation of eigen value, display of characteristic curve, straigh and Nyquist diagram on the screen and graphing etc. It can be done automatically and continuously by microcomputer. And in the paper, the software and hardware in measuring system, to describe static characteristic curves are advanced by optimum approximation... The total process in static and dynamic characteristic tests of water turbine governor consist of the operation, measurement, data treatment, numerical approximating, choice of specific points, calculation of eigen value, display of characteristic curve, straigh and Nyquist diagram on the screen and graphing etc. It can be done automatically and continuously by microcomputer. And in the paper, the software and hardware in measuring system, to describe static characteristic curves are advanced by optimum approximation multinomial the amplitude and value phase-angles of harmonic response are defined by system discriminating method, the choosing principle and method of specific points are discussed. And measuring results in the workshop are introduced. 水轮机调速器静、动特性试验的全过程包括操作、测量、数据处理、数值逼近、特定点选定、特征值计算以及特性曲线、直线和奈奎斯特图的屏幕显示和图形绘制等,可以由微机自动连续进行。本文介绍了测试系统的硬、软件,提出用最佳逼近多项式描述静态特性曲线,用系统辨识方法确定谐波响应的幅值和相角,论述了特定点的选择原则和方法,最后介绍在制造厂的车间测试结果。 This paper summarizes the principles and methods of the contact pressure between gate and bearing which were studied by authors with the method of photoelasticity during the years from 1985 to 1988 and presents the stress distribution properties of two rollers with different types, drum and cylindrical and the stress results of two rollers with diameters 0= 400mm and I 000mm under loads of 1 X 103kN ,7×103kN and 1×104kN, some results of which have been verified with the solution in elasticity mechanics... This paper summarizes the principles and methods of the contact pressure between gate and bearing which were studied by authors with the method of photoelasticity during the years from 1985 to 1988 and presents the stress distribution properties of two rollers with different types, drum and cylindrical and the stress results of two rollers with diameters 0= 400mm and I 000mm under loads of 1 X 103kN ,7×103kN and 1×104kN, some results of which have been verified with the solution in elasticity mechanics theory. Measurement and investigation are made on the contact surface (plastic zone) and several relevant problems above have been discussed in detail. 本文总结了作者自1985年至1988年间,用光弹性方法研究水工平板闸门支承滚轮接触应力的原理、方法,并介绍了两种不同类型的支承滚轮(鼓形轮及柱形轮)的应力分布特性,以及不同轮径(φ400mm和φ1000mm)的滚轮在1×10~3kN、7×10~3kN、1×10~4kN等载荷下的应力成果,对其中的一些成果用弹性力学理论解作了验证,对接触压痕塑性区做了测量和研究,并对上述涉及的有关问题做了详尽的分析。 << 更多相关文摘
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