1)roughness coefficient糙率系数
1.Determination on the roughness coefficient of Wutong River natural river course;梧桐河天然河道糙率系数的确定
2.Velocity distribution on a rough bed is more non-uniform than that on a smooth bed, the turbulence intensity distribution of non-uniform flow becomes uniform with increase of the relative depth, and the regularities of the roughness coefficients of non-uniform flow on a rough bed are.粗糙床面非均匀流的水槽试验表明,非均匀流断面的垂线流速分布需用两个对数公式分别描述;粗糙床面的流速分布较光滑床面不均匀;非均匀流的紊流度分布随相对水深的增大而趋于均匀;粗糙床面非均匀流糙率系数的变化规律与光滑床面近似。
3.It is clearly that the roughness coefficient needs to be corrected in hydraulic calculations for open channel flow.根据明渠水流流动型态的概念,通过对实验资料的分析,得到均匀流时糙率系数随水深增加而减小,形成M1型水面线的非均匀流时糙率系数随水深、水力坡度的增大而增大的规律。
英文短句/例句
1.Study on the Roughness Coefficient of Slope Face in the Granitic Region of Three- Gorge of the Yangtze River长江三峡花岗岩区坡面糙率系数研究
2.Roughness Coefficient and Turbulent Characteristics for Non-uniform Flow in Open Channels;明渠非均匀流糙率系数及水力特性研究
3.Optimal Inverse Method Applied for Determination of Soil Infiltration Parameter and Manning s Roughness Coefficient;土壤入渗参数和糙率系数的优化反求方法及应用
4.Variability of Roughness Coefficient and Its Effect on Border Irrigation Performance畦灌糙率系数的变异规律及其对灌水质量的影响
5.Surface roughness coefficient and its influencing factors on the slope of typical forests in Jinyun mountain of Chongqing重庆缙云山典型林分的坡面糙率系数及影响因素
6.Inversion of Channel's Roughness and Integrated Leakage Coefficient Based on Genetic Algorithm基于遗传算法的渠道糙率及综合渗漏系数反演
7.The Study of Rough Data Querying Based on RRDB;粗糙关系数据库的粗糙数据查询研究
8.Investigation on parameter identification for river network model by using genetic algorithm基于遗传优化的河网数学模型糙率参数反演
9.Synchronously Determining Philip Infiltration Parameter and Synthesis Roughness Model of Border Irrigation畦田Philip入渗参数和田面综合糙率同步推求
10.Direct inversion method of river network roughness based on data mining基于数据挖掘的河网糙率直接反演方法
11.Probability Rough Set Model and Bayes Decision-making under Fuzzy Relationship模糊关系下的概率粗糙集模型及其Bayes决策
12.power coefficient功率系数，动力系数
13.use factor利用系数, 利用率
14.A STUDY ON DETERMINATION OF OPTICAL ABSORPTION COEFFICIENT OF SAMPLE WITH ROUGH SURFACE Ⅰ. THEORY表面粗糙样品吸收系数的测量研究Ⅰ.理论
15.Research on Rough Set Data Analysis Based Intelligent Decision Support Systems基于粗糙集数据分析的智能决策支持系统研究
16.Study of Data Mining in Incomplete Information Systems Based on Rough Set Theory;不完备信息系统数据挖掘的粗糙集方法研究
17.Data Mining System Based on Rough Set Neural Network and Its Application;基于粗糙集神经网络的数据挖掘系统及其应用
18.Investigation and Realization of Rough Set Reduction Algorithm Based on Relational Database;基于关系型数据库的粗糙集约简算法及实现
相关短句/例句
Manning roughness factor曼宁糙率系数
3)synthesis roughness coefficient综合糙率系数
1.Study on field synthesis roughness coefficient for laden surge flow border irrigation;浑水波涌畦灌田面综合糙率系数研究
4)surface roughness coefficient地表糙率系数
1.The surface roughness coefficients of 11 typical stands were quantified by using the Manning Formula for field experiments during the year 2002 and 2003 in Xiangshuixi watershed, Three Gorges Region,at Jiangjin City of Chongqing Municipality.2 0 0 2— 2 0 0 3年期间 ,作者选择三峡库区响水溪流域 1 1块具有典型代表性的林地 ,在野外小区径流实验基础上 ,通过曼宁公式 ,对地表糙率系数进行了定量研究 。
5)roughness parameter糙率参数
1.To detect the effect of roughness parameters in real time correction for flood forecasting, and improve the accuracy of hydraulic forecasting model,the Kalman filter was applied to realize the real time correction of the roughness parameters by the momentum equation.针对洪水预报中糙率参数的实时修正问题,采用卡尔曼滤波技术,实现动量方程实时校正糙率参数,以提高水动力学模型的洪水预报精度。
6)synthetic surface roughness coefficient田面综合糙率系数
1.With combining optimization method, an optimal model of determining synthetic surface roughness coefficient in film hole irrigation was developed.根据膜孔灌溉田面水流运动特性 ,建立了膜孔灌溉田面水流运动零惯性量数学模型 ,并将其与优化理论相结合 ,提出了确定膜孔灌溉田面综合糙率系数的优化模型。
延伸阅读
糙率 见谢才公式。
