constant surface method 中文意思是什麼
constant surface method
解釋
恆定表面法-
And the explicit finite difference method, the combining method of the central difference method and newmark s constant average acceleration method, and the transmitting boundary are used. by comparing the acceleration determined by the several methods of the displacements or velocities, a computing method of acceleration employed the one side difference of velocity is more practicality in this research. corresponding to normal incidence of the body waves, p waves or svwaves, and rayleigh surface waves, two two - dimensional finite difference programs are compiled to compu te the dynamic response of two - phase media
以土力學模型為基礎，利用以土骨架和孔隙流體的四個位移為基本未知量的數值方法去模擬二維飽水介質中的地震波傳播，採用了顯式差分方法（中心差分法和newmark常平均加速度法結合）和透射邊界，通過比較利用幾種差分格式求解的加速度結果，發現一種用速度單邊差分求解加速度的方法在本文研究中較為實用，分別編制了體波（ p波或sv波） 、 rayleigh面波輸入時求解兩相介質動力響應的兩個二維數值分析程序。 -
The surface panel method has been applied to predict the hydrodynamic performance of highly skewed propeller. the surface of propeller and its trailing vortex are discreted by a number of small hyperboloidal quadrilateral panels with constant source and doublet distribution. for highly skewed propeller, the conventional method generating grid oriented along constant radii will result in a high aspect ratio and a high skewness and a twist panel near the propeller tip on blade surface, which result easily in incorrect calculation results of velovity on blade surface, even in iteration divergence and calculation failure. a “ non - conventional grid ” is developed to acoid these problems. this grid can effectively solve the problem of the calculation and convergence for highly skewed propeller. the non - linear kutta condition of equal pressure on upper and lower at the trailing edge is executed by the iterative procedure. by sample calculating, the obtained results are satisfied the experimental data
採用面元法預報大側斜螺旋槳水動力性能，螺旋槳表面及尾渦面離散為四邊形雙曲面元，每個面元上布置等強度源匯和偶極子分佈.對于大側斜螺旋槳而言，槳葉表面採用常規的等半徑網格劃分方法在近葉梢處將導致大展弦比、大側斜和扭曲面元，這容易使槳葉表面速度的計算結果不正確，甚至會導致迭代過程發散及計算失敗.文中建立了一種「非常規網格」劃分方法，能有效地解決大側斜螺旋槳的計算和收斂問題.槳葉隨邊處通過迭代實現非線性等壓庫塔條件 -
In this work, the influences of fabrication process on microstructure, dielectric properties, ferroelectric properties and pyroelectric properties of plt films have been studied. plt films were prepared on the pt ( 111 ) / ti / sio2 / si ( 100 ) substrates by radio frequency magnetron sputtering method and then annealed by rapid thermal annealing process ( rta ) or conventional furnace annealing process ( cfa ). with the help of atom force microscopy ( afm ), x - ray diffraction ( xrd ) and some other apparatus, it was found that : lower substrate temperature ( ts ) was helpful for plt films to form better surface morphologies. with the increase of substrate temperature, the dielectric constant of plt films increased
Afm 、 xrd以及性能測試結果表明:較低的基片溫度有利於形成表面均勻緻密的薄膜，且薄膜的表面粗糙度均方根較小;隨著基片溫度的升高，經過快速退火的plt薄膜的介電常數逐漸增大;相比于傳統退火，快速退火縮短了退火時間，提高了薄膜的介電和鐵電性能;快速退火隨著保溫時間的延長，大部分鈣鈦礦結構的特徵峰的峰強增大，半高寬減小，峰形越來越尖銳，但當保溫時間為80s的時候， （ 100 ）和（ 110 ）峰的強度有所下降，因此保溫時間在60s較為適宜。 -
Construction of flat tunnel of large span at extra - shallow depth must be conducted on the principle that advance grouting should be strictly performed before excavation and length of pull at one time should be short, together with reinforced support, immediate closing and constant monitoring and surveying. that preceding pilot tunnels, large - volume excavation divided into small ones, excavation of flank before that of center, upper before lower, arch before wall etc is a good method which could effectively reduce surface subsidence and its adverse effect on adjacent buildings, in addition, some other measures are also taken to lessen blast - induced vibration in the ground and surrounding structures. in a word, all means and steps mentioned above have already proved effective and practicable in practice
軟弱大跨超淺埋扁平隧道必須按「管超前，嚴注漿，多分部、短開挖、強支護、快封閉，勤量測」的施工原則進行施工，採用「眼鏡超前，化大為小，先側后中，先上後下，先拱后墻」的施工方法控制地表沉降和對周邊建築物的影響；採用「多分部，化大為小，短進尺，密布眼，弱裝藥，設減振槽」 ，控制爆破振動，經過實踐證明，這些方法都是行之有效的。 -
Secondly, on the basis of the discrete data and smooth feature of the surface of the radome, the inner surface is reconstructed by the bicubic uniform b - spline surface approximating means with least square method. finally, a tool - path planning method is presented, which is a combination of the constant scallop - height method with the isoparametric method
在分析目前最為成熟的結構化和面向對象軟體工程方法的基礎上，應用結構化和面向對象方法相結合的思想，實現了天線罩測量和磨削的軟體系統的分析、設計和開發。 -
Then virtual dielectric constant method is adopted to calculate the electric field distribution with floating electrodes, and equivalent conductance rate method is adopted to calculate the electric field distribution with surface filth or local puncture in the insulator, furthermore the value scope of virtual conductance rate and equivalent conductance rate are discussed and some useful results are got. for the solution of vortex loss of silicon steel sheets concerning current transformer, the h solution has also been put forward rather than traditional a ? ( p method in order to reduce calculation load
採用虛擬介電常數法計算絕緣子存在懸浮導體的電場分佈，採用等效電導率法計算絕緣子存在表面污穢或局部擊穿情況下的電場分佈。對虛擬介電常數和等效電導率的取值范圍進行了討論，得出了一些有用的結論。對于電流互感器硅鋼片渦流損耗的計算，本文提出了不同於傳統的a -方法的h求解辦法，從而大大簡化了計算。 -
When whole analysis is carried through the beam - lattice method and bridge surface is made of box beams with one box and two cells, according to the principle of constant bending rigidity and every part revolving the same neutral axis, a box beam can be simplified into three beams in the places of corresponding webs. thus effective transfer of shearing force can be ensured, and global property can be reached through that of three beams, this kind of method is simple and is able to ensure engineering precision ; secondly, the paper is based on elastic theory, adopts finite element method and carries through the first kind stability analysis towards zhongshan no. one bridge
在選用梁格法進行整體分析時，遇到橋面系是單箱雙室的箱型梁時，按照抗彎剛度不變且各部分繞著同一中性軸的原則，將一個箱型梁在相應的腹板處簡化成3根梁，能夠保證剪力的有效傳遞，而且可以由這劃分的3根梁的性能得到箱型梁結構的總性能，這種方法簡便易行且能保證工程精度；其次，本文基於彈性理論，採用有限元法對中山一橋進行了第一類穩定分析。 -
A numerical method, based on single temperature sensor, constant heat flux assumed and arbitrary number future time steps, was employed to determine the heat flux during rapid cooling on high temperature surface with multiply immersed impinging water jets the finite volume discretization method and treatment of boundary condition were presented
摘要基於單點測溫、常熱流假設，任意未來時間步長的導熱反問題演算法求解浸沒水射流冷卻過程的熱流密度；採用有限容積法離散方程，附加源項法處理邊界條件。
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