流數法 的英文怎麼說
中文拼音 [liúshǔfǎ]
流數法
英文
method of fluxions-
Simulation of flow around an airfoil by the lattice boltzmann method
方法的翼型繞流數值模擬When calculous was at it ' s initial stage, newton computed the integral by contradictorily operation of differential, leibniz used the " tiny elements " method
在微積分的初創時期, newton通過微分法的逆運算,即「反流數術』來解決求積問題,而leibniz則採用「微元法』 。Using the split steps finite element method, the varied - boundary two - dimensional numerical model of diurnal tide and tidal current in the luoyuan bay is constructed
摘要採用不規則三角形網格的分步雜交法,建立羅源灣海域二維變邊界全日潮汐和潮流數值模型。The studies of plane heterogeneity are as follows : the text counts the parameters of the sandlayers " geometric shape of different sedimentous microfacies ; speculates the conditions of lateral communication by sandstone density according to the method brought forward by j. r. l. allen ; gets a group of parameters including the reservoir thickness, porosity and coefficient of permeability by using kriging method according to the data of logging results ; makes certain the direction of coefficient of permeability with variation function by modeling globosity function ; divides the sandlayers into five types by using the method of flowing cell based on three parameters, that is x h, kxh and h / h, and accounts the favorable region. on the base of above - mentioned studies, the text evaluates the heterogeneity of sandlayers and gives the resolutions to these problems to serve the development of the field
Allen )等人提出的統計方法,用垂向上砂體密度的界限來推測砂體側向連通情況;根據每口井的測井解釋資料,利用克里金插值法對外間進行插值,得到了一組反映儲層特徵在平面上變化的參數,包括儲層厚度分佈、孔隙度以及滲透率,並且成圖;利用變差函數法,通過球狀函數模擬,確定儲層優勢滲透率方向:根據流動單元法,以儲能系數、容積系數以及凈毛厚度比三個參數為依據,通過聚類分析方法進行流動單元劃分,並且按照參數特徵將其分為五類,統計各砂層有利流動單元區塊。The method that measuring horzontal component of the earth magnetic field with digital quantometer is introdnces, the computational formule are given, systematic error are discussed, the advantages of the this method with tangent galvanometer measuring horizontal component of the earth magnetic field are simply expounded
摘要介紹了用數字沖擊電流計測量地磁場水平分量的方法,給出了計算公式,對系統誤差進行了討論,簡述了該方法與用正切電流計法測量地磁場水平分量的優點。Finite volume method is appilied in numerical modeling of the flow in no - pressure tunnel of high water reservoir in this paper. i select standard k - turbulence modeling that put forward by launder and spalding in 1972 by weighted poly - turbulence modeling. the difficulty is that there is free surface in flow, but free surface problem ' s calculating region is indefinitely
本文利用有限體積法對高水頭下水庫無壓泄水洞水流進行了紊流數值模擬,根據多種紊流模型的優缺點進行比較,選擇了launder和spalding於1972年提出的標準的k ?紊流模型。Objective : to provide a minimum sample size approach and a sequential sampling approach for testing whether the sporozoite rate has exceeded the critical level of malaria epidemics using the pool sampling method
摘要目的:給出基於混合樣本的最小檢測次數法和序貫檢驗法,以檢驗子孢子陽性率是否超過導致瘧疾流行的臨界水平。Liu changgen, tao jianhua. modeling the interaction of solitary waves and semi - circular breakwaters by using unsteady reynolds equations. applied mathematics and mechanics ( english edition ). 2004, 25 ( 10 ) : 1118 - 1129
孫健,陶建華.潮流數值模擬中動邊界處理方法研究[ j ] .水動力學研究與進展(已錄用)The calculation method of ln ( / tan # ) index widely used is the multiple flow direction algorithm developed by quinn et al. it can been seen that, in the algorithm, the contour length normal to the direction of flow flowing out the current cell is used to determine both a and tan #, and that the calculated total cumulative contributing area of downslide grid cell does not include the area of the current cell
目前普遍使用的計算該地形指數的方法為多流向法。方法中計算和tan用的均是與流出單元網格流向垂直的等高線長。另外計算下坡單元網格累積匯流面積時沒有考慮欲計算ln ( tan )值的單元網格的面積,這些是不合理的。Aiming at the study actuality of fan performance monitoring system and analysis of fan performance curve changes affected by inlet - box and the different fixed - angles of guide blades in the course of installation, a fan flow monitoring model based on rbfnn in whole flow zone was established in this thesis. in the model, the method of no throttle and fan performance curve were used as basis. and on the basis of that model, fan performance curves of 4 - 73no. 8d were approached with experimental data of different speed, different opening - angles of guide blade and different resistance of pipeline, the precision and the error law of model were studied
本文針對電站風機性能監測系統研究較少的現狀,在實驗的基礎上分析了現場加裝進氣箱和由於安裝造成的導流器葉片開度不一致對風機性能曲線的影響,並在此基礎上採用無節流方法測量流量,以風機調節性能曲線為依據,建立了基於徑向基函數( rbf )神經網路的風機流量全程監測模型;以實驗室4 - 73no . 8d離心風機為研究對象,探討了rbf神經網路差壓模型在變轉速、變導流器開度和變管網阻力等工況下的應用精度和誤差分佈規律;最後用visualc + +語言開發了風機性能在線監測系統。Numerical simulation of square cavity flow by second - order up - wind finite volume method
二階迎風有限體積法方腔流數值模擬The application of character word in terminal guiding radar multi - target generating system
特徵字數據流方法在信號源多目標生成系統中應用( l ) the three - dimensional equations for tidal flow are derived from the navier - stokes equations based on some assumptions. the model is based on the vincenzo casulli method, and semi - implicit finite difference scheme has been used
( 1 )從navier - stokes方程上經過假設和簡化得到的三維潮流控制方程,以vincenzocasulli法,採用半顯半隱差分格式,建立了一個三維潮流數值模型。Though adopting the - coordinate transformation in the control equations and mode - splitting technique, the external mode ( surface gravity waves ) is solved by the improved double - sweep - implicit finite difference method ; the internal mode ( internal gravity waves ) untilizes the eulerian - lagrangian method, which improves the implicit - difference scheme for the vertical direction. the newly developed 3d numerical tidal model with implicit scheme has been successfully applied in the radial sandbanks area
基於過程分裂法及垂向坐標伸縮變換,外模式採用改進型雙步全隱有限差分dsi法,內模式採用歐拉?拉格朗日公式,改進了三維垂向隱式格式,成功地建立了南黃海輻射狀沙脊群海域三維全隱格式潮流數學模型。In the second part, for the purpose of poverty identification, we elaborate the poverty line and its types. by incorporating its determinants, i. e. minimum demand, income and other factors, the problem to choose poverty line is explored. we explained some popular methods to determine a poverty line, that is, shopping basket method, engle ’ s ratio method, international poverty line standard and life style method
從貧困的識別看,在定義並劃分貧困線之後,從最小需求和收入兩個基本要素出發,結合其他因素來確定貧困線,並著重分析了市場菜籃法、恩格爾系數法、國際貧困標準法、生活形態法四種主流的貧困線測量方法。Some correlative designs and experiments are finished before the microwave test experiment. the property of a finite long magnetic coil is studied and the coil magnetic field circuit is constructed for the experiment of microwave. a digital two - channel trigger device is designed and successfully applied in the experiment
為了微波實驗的順利進行,我們設計並加工了磁場線圈,研製了控制磁場線圈迴路觸發和強流電子束加速器觸發同步的兩路數字同步觸發器,研製了測量電子束流的法拉第筒,並成功地將這些設備應用於微波實驗研究。A non - grid hydrodynamic numerical model is established by using the moving particle semi - implicit ( mps ) method to investigating the possibility of the model in the research of the hydrodynamics of the coastal structures under the action of water movement
摘要運用一種移動粒子半隱式法建立無網格水流數值模型,探討該模型在結構物水動力特性研究中的可能性。Through flume experiment and numerical simulation, preliminary work on computation of water surface profile in regulation river reach, numerical simulation of flow with single spur dike in flume, and 3 - d numerical solution of flow around spur dikes group are carried out in this paper
本文通過模型實驗和數值模擬相結合的研究方法,在整治河段一維水面曲線計算,單丁壩繞流數值模擬,紊流數學模型在航道整治工程中的應用以及丁壩群附近水流的三維流動特性等方面做了一些初步研究。In this article, simulations of air distribution in the vav air - conditioned office are carried out in the cases of different air - supplying diffusers including slot diffuser, sqaure grille, bar grille and square diffuser to supply air, the standard three - dimensional k - ? two - equation turbulence model with correctional item of buoyancy effect and simple algorithm are adopted, and wall function method is used to handle boundary conditions
本文採用經過浮升力項修正的-兩方程模型和simple演算法,應用壁面函數法處理邊界條件,對利用包括條縫風口、方型百葉風口、長條型百葉風口和方型散流器不同型式送風口送風的變風量空調房間內的氣流組織進行了模擬。Based on the vibration test in yantan hydropower house, in this paper the author adopt les method which belong to three dimensions unsteady turbulent flow numerical analysis to simulate vibration resource characteristics of hydrogenerator set, a harmonic vibration model of powerhouse substructure is put forward to carry out firstly a precise modal analysis and dynamic response analysis for generator floor. the numerical calculation results agree well with the surveyed data in situ
本文結合巖灘水電站廠房振動的試驗研究,採用非定常湍流數值分析的大渦模擬方法進行混流機組水力振動振源模擬;提出一種水電站廠房下部結構簡諧振動模型,首次進行了發電機層樓板結構的精確模態分析和水力激振荷載下的動力響應分析,各項計算結果與實測數據吻合良好。分享友人