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- Runoff from up-slope had an important effect on rill flow hydraulics parameters, such as rill flow v elocity, Reynolds number and Daycy-weisbach coefficient. 上方来水对细沟水流水力学参数(流速、水力半径、雷诺数、弗劳德数和阻力系数)有重要影响。
- The flow field of PDC bits is very complicated during drilling process, while optimizing its hydraulics parameters is an effective method to improve its drilling performance. PDC钻头在实钻过程中井底流场非常复杂,而优化其水力学参数是提高钻头钻井能力的有效手段。
- Rill erosion processes and rill flow hydraulic parameters. 土壤溶质运移参数估计图解方法。
- Appling different rheological models would cause in great effect on calculation of drilling hydraulic parameters. 选用不同的流变模式对钻井水力参数的计算影响很大。
- The mathematical model,the method for optimizing design,and the design princi-ple of hydraulic parameters are proposed to make head-flow curve flat. 流量曲线特点,提出了旋喷泵叶轮的优化设计数学模型、叶轮优化设计方法及水力参数的设计原则。
- The pollution straps of one-side mirror model and two-side mirror model were simulated and compared by using the hydraulic parameters of the Lishui River in Hunan Province. 根据湖南省澧水某段枯水期的水文参数 ,对一侧镜像模型和两侧镜像模型的污染带进行了模拟 ,发现一侧镜像模型由于忽略了一个虚源而使河流中污染物的浓度分布产生较大的误差 ,从而导致污染带异常 ;
- Different combinations of PDC drilling bits( hydraulic parameters are comprehensively reflected by flow field energy transformation at oil well bottoms. PDC水力参数的不同综合表现为井底流场能量的变化。
- The measurement error may occur due the soil sample for determining the hydraulic parameters is always not the same sample for determining the solute transport parameters. 目前由于实验系统和研究方法的限制,在测定水力参数和溶质运移参数时所采用的土壤样本不一致,产生了样本误差。
- Research on Rill Erosion Process and Rill Flow Hydraulics Parameters 细沟侵蚀过程与细沟水流水力学参数的关系研究
- Based on the assumption of logarithmic velocity distribution within turbulent boundary layer and the aplication of energy equilibrium theory, formulas for Hydraulic parameters are obtained in this paper. 在紊流边界层内,流速为对数分布假定的基础上,本文利用水流能量平衡方程计算紊流边界层沿流程发展的厚度从而推导出溢流面一些水流参数的计算公式。
- The model indicates that three types of parameters affect the ADCP discharge measurement random uncertainty: ADCP system parameters, river hydraulic parameters and field operation parameters. 该模型表明,影响ADCP流量测验随机不确定度的参数可以分为三类:即ADCP系统性能参数、河流水力参数、测验作业参数。
- The indeterminacy of hydraulic parameter of the pebble rapids on the upper reaches of the Yangtze River is one of the reasons of failure in rapids regulation. 摘要长江上游卵石急滩经过多次整治,仍然碍航,水力指标的不确定性是卵石急滩整治不成功的原因之一。
- Estimate of Hydraulic Parameters of Overland Flow 坡面流水力学参数的估算
- Jinzhou Lite Cylinder Pump Valve Hydraul. 锦州市立特缸泵阀液压制造有限公。
- Yancheng Huaxing Hydraulics Machinery Co., Ltd. 盐城华兴液压机械有限公司。
- One-parameter models of soil hydraulic parameters 土壤水力参数的单一参数模型
- W ater and Low V iscosity Fluid Hydraulics[ Z]. 刘银水;黄艳;贺小峰;等.;水压阀的研究与发展
- We have to work within the parameters of time and budget. 我们工作受时间和财力所限。
- L- 300 hydraulic parameters tester L-300液压参数检测仪
- unsaturated hydraulic parameters 非饱和水力学参数