density boundary 中文意思是什麼
density boundary
解釋
密度邊界-
The method of the model retrieval breaks down the traditional population density statistics method according to the administrative area boundary and changes to evenly distributed and same size grid units to compute the population density. it enriches the methods to obtain the population density indexes and increases the accurate degree and application fields of the indexes. so, it will benefit to the decision process of the population and economic policy, benefit to the sustainable development of regions
這種模型反演的方法，突破了傳統的按行政區界線統計人口密度的方法，改為按照均勻分佈、規則大小的格點單元來計算人口密度，豐富了獲取人口密度指標的方法，提高了人口密度指標的精確程度和應用范圍，將有利於人口、經濟政策的決策過程，有利於區域可持續發展。 -
In the aspect of output characteristics, after applying the boundary conditions and the continue condition of two segments, the correlative dependence of average photon density in each segment has been obtained. combining this dependence with the threshold conditions, the theory foundation is settled
在兩段式dfb激光器的輸出特性研究方面，利用邊界條件以及兩段之間的連續條件，導出了兩段平均光子數密度之間的依賴關系；這和兩段式dfb激光器的閾值條件表達式相結合，構造了本文研究激光器輸出特性的理論框架。 -
In boundary treatment, the model turns into generally adds coarseness boundary made of specially complex many coarseness body in the physical model experiment as the coarseness body highly and discharges the density to add the coarseness spot as the main characteristic whole, both to avoid the location within the body of this complex mathematical simulation problems, and could realize this model after to simulate the apron that adds the coarseness namely adds the coarseness section downriver speed of flow to the downriver current of water base speed of flow influence in to hang upward
該模型在邊界處理時，將物理模型試驗中由特別復雜的多個加糙體組成的加糙邊界概化成以糙體高度為主要特徵的整個加糙部位，既避開了對加糙體內部進行極其復雜數學模擬的這一難題，又能實現模擬海漫加糙段下游水流流速在垂向上的分佈變化這一主要目的。在獲得基本的入流流速分佈、初始水位及加糙體的絕對高度和加糙段長度的情況下，能迅速模擬出加糙段下游各個斷面在垂向上的流速分佈情況。 -
Testing results are analyzed, then the boundary condition ( the heat transfer coefficient of and the water density ) for computer simulation is acquired. through simulation in computer using the all - purpose computer simulation software secondary cooling in slab continuous casting and test results, the influence of the factor such as casting speed, casting temperature, shell thickness and secondary cooling system are analyzed. the secondary cooling system is evaluated, the reasons of crack are analyzed
應用模擬軟體和實驗數據對寶鋼1930鑄機進行了模擬計算，分析了拉速、配水制度、過熱度對鑄坯溫度場和坯殼厚度的影響；對寶鋼1930鑄機的二冷制度進行了評估，分析了產生裂紋的原因；並對二冷制度進行優化，提出了改進建議。 -
Liquefaction of saturated sands is a greatly complicated phenomenon. its generation, development and dissipation are restricted by physical property, stresscondition and boundary condition of soils. in addition, there are a lot of influencing factors such as density, structure property ， clay content, degree of saturation, gradation, hydraulic conductivity, initial stress condition and dynamic load character and so on
砂土液化是一種相當復雜的現象，它的產生、發展和消散主要由土的物理性質、受力狀態和邊界條件所制約，存在許多影響因素，例如土的密度、土的結構性、粘粒含量、飽和度、級配、透水性能以及初始應力狀態和動荷載特徵等。 -
Firstly in this part, computer simulation methodology based on the baecher model for generating network of discrete fractures was presented, which includes the follow details : probability distributions of fracture density, orientation, trace length, size, and aperture and estimation of their statistical parameters ; stochastic models of fracture network ; monte - carlo ' s simulation method ; numerical simulation procedure and technicality. then, boundary element method was used to calculate flow through the generated fractured network. assuming single fracture as a two - dimension inexpressible isotropic porous media, boundary element method equations for flow in single fracture and then in fracture network were derived using the weighted residual method
給出了離散裂隙網路模型所依據的基本假定；發展了基於baecher模型的離散裂隙網路計算機隨機生成技術：詳細地推導了單裂隙滲流和多裂隙相交網路滲流的邊界單元法公式，發展了離散裂隙網路中穩態滲流的邊界元數值技術，並且討論了相關的具體數值技術細節，如角點的處理方法，單元的自動剖分等：描述了混合邊界元?管流模擬方法及其數值實現；研究了裂隙網路的簡化方法，並針對裂隙網路邊界元法的特點提出了一種改進的分塊三角分解法。 -
These results show the expected increases in solar wind plasma density downstream of the bow - shock boundary, as well as significant solar wind plasma densities within mercury ' s magnetosphere close to the planet
這些調查結果表明，預計增幅在太陽風等離子體密度下游弓激波邊界，以及大量的太陽風等離子體密度與水星的磁層接近地球。 -
We also analyze the influence of the boundary condition 、 safety distance and deceleration probability to the traffic flow. finally, we propose an crossroad modle. this model is made up of one main road and one branches ： traffic with lights placed on the crossing, vehicles " breaking while running and turning to other direction while jamming. we investigate the velocity and flow of the model when the initial density, the brake and turning probabilities, the green to signal ratio are changed. then the reasons causing all the kinds of phenomena are analyzed
最後研究了周期性邊界條件下的十字路口的ca模型，該模型由一條主幹道和一條支道組成，在幹道與支道的交叉路口設置紅綠燈，車輛在運行中對突發事件發生反應的剎車，路口的車輛可以轉向等各種實際交通行為，並通過計算機模擬，研究模型在改變車輛的初始密度、剎車概率、轉向概率、紅綠燈信號的綠信比等各種情況下支、主幹道車輛的速度、流量的變化，並分析在各種情況下交通狀況的成因，提出改善交通的有效措施。 -
Based on some discussions on the mathematic model set up for the cathodic protection potential field, a two - dimensional boundary element method ( bem ) is developed, and by using which, a study on the shielding effect resulted from some typical inner structures such as the reinforcing elements and the partition walls with man holes on distribution of potential and current density in the cathodic protection is performed. the investigated parameters which affect the shielding effect in the calculating model include : the height and thickness of the reinforcing elements, the distance between the anode and the reinforcing elements, and the diameter of man hole on the partition walls, and so on
本文在討論了陰極保護電位場問題的數學模型的基礎上，以二維邊界元法對陰極保護問題中的電位及電流密度分佈進行了模擬計算，重點對船舶壓載艙中的典型結構如加強筋、人孔等在陰極保護中所產生的屏蔽效應進行了分析和研究，通過對不同高度、厚度的擋板及不同孔徑的帶孔板所產生的屏蔽效應進行模擬計算，首次得到了一些對實際工程設計具有重要參考意義的見解。 -
On the surface of annealed 45 steel, as the pearlite in it contains cementite phase and has high crystal boundary density, the nucleation and growth of deposits prefer to occur at the pearlite at the beginning during depositioa the coating exists in form of nano - polycrystal layers composed by gathering of nano - sized crystals
在退火態45鋼表面，由於珠光體組織中含有滲碳體相且具有比較高的晶界密度，因而在沉積初期鍍層優先在此處形核和生長；鍍層在基體表面是以納米尺度的晶粒聚集在一起形成的聚晶體形式存在的。 -
Finally, the wave equation of the electromagnetic field of this kind damper is derived from the maxwell ' s equation. the magnetic flux density at the boundary is assumed to be harmonic, so the analytical result of the wave equation is solved. when the rotor rotates, eddy currents flowing inside the conducting material field are caused
最後，應用ahrens的電磁軸承簡化模型，從maxwell方程出發推導了應用於本文所述的被動式電磁阻尼器的波動方程，並用傅立葉級數把矩形磁場展開的諧變磁場作為磁場的邊界條件，通過求解波動方程得到磁場的解析解，從而計算了阻尼器對轉子的電磁力和由渦流引起的切向力產生的阻尼器附加功耗。 -
In the theoretical simulation on the behavior of single helium atom in aluminum, the varieties of energy data including the formation, migration, binding, and dissociation energies for single helium atom at the interstitial, vacancy, grain boundary, and dislocation sites in aluminum lattice were calculated, based on the density functional theories, general gradient approximation and pseudopotential plane wave method. results showed that the most fittable sites for containing helium atoms inside the cell are vacancies. but in the view of the whole lattice, grain boundaries are the best
計算結果表明，晶內he原子擇優佔位區是空位，而在整個晶體范圍，最有利於容納he原子的區域是晶界，位錯容納he原子的能力次於晶界和空位；在fcc -鋁的間隙位中， he原子優先充填四面體間隙位；晶內間隙he原子是可動的，通過間隙he原子的運動，可在晶內聚集，或被空位、晶界、位錯等缺陷束縛。 -
The studies of circulation in ecs were most based on the analysis of temperature and salinity data and diagnostic mode. aim at breaking this limitation, we had established a quasi - predictive model in the ecs by reconstructing the pom model to overcome the difficulties brought to the simulations by steep terrain and great density gradient in the new model, the monthly mean sst data in the ecs and the result of global ocean model were used as the boundary conditions to simulate the distribution of the temperature and the circulation structure in the ecs
針對以往溫、鹽資料分析和模式診斷方法為主的東中國海環流研究的局限性，通過改造pom模式，克服因陡峭地形和大密度梯度給模擬帶來的困難，建立了東中國海環流準預報模式，運用本文第三章獲得的sst資料和全球大區模式的結果作為模式的邊界條件，模擬了東中國海溫度分佈與環流結構。 -
At last, the validity and the superiority of boundary - spectrum are improved by contrasting with power spectrum density ( psd ) to analyze tested data
同時通過實驗信號的局域波邊界譜和功率譜分析比較，突出了局域波邊界譜分析的可行性和優點。 -
Abstract : this paper describes the boundary element numerical solution technique for high - density resistivity two - dimensional topographic correction, with examples given illustrating its application to two - dimensional topographic correction in detecting underground gas pipes
摘要給出了高密度電阻率法二維地形改正的邊界元數值解法及其探測地下煤氣管道時進行二維地形改正的應用實例。 -
At last, with the stiffness method, the effect of diaphragm density on restraining the distortion of thin - walled bar is analyzed. with different load cases of uniformly load and concentrated load and different boundary conditions of two fixed ends and two simply supported ends and cantilever, the distortion and torsion of the same rectangle thin - walled girder is examined
在均布和集中兩種反對稱荷載情況下，按兩端固定、兩端簡支和懸臂三種不同的支承情況，採用剛度法對同一矩形截面薄壁桿件的畸變和剛性扭轉分別進行分析。 -
Transient convective mass transfer at constant boundary density
定壁面濃度瞬態對流傳質的理論分析 -
The integral seismic behaviors of other three kinds of connection, namely bfp, dst, and sep connections are better than that of normal wfp connection. by the way, finite - element ( fe ) analyses were conducted to predict the influence on cfst structure under different kinds of elements, mesh density, load manners and boundary conditions. after that, a special program was designed to define the constitutive relationship of concrete material in cfst structures based on apdl in ansys program
此外，本文探討了不同的單元類型、不同的網格劃分密度、加載方式與邊界條件對鋼管混凝土組合結構數值計算的影響，運用ansys中的apdl語言，編寫了適合鋼管混凝土結構分析的混凝土材料本構關系程序，並運用該程序結合ansys對常規栓焊節點與翼緣全螺栓連接節點的滯回性能進行了初步計算，為進一步地數值分析打下了基礎。 -
The separation algorithm based on boundary tracing do not need the acute angle and / or the low density contrast at the points where the objects touched and get better separation result
基於邊界跟蹤的分離演算法能夠克服聚堆目標連接處的凹陷比較明顯並且或者在連接處存在灰度局部最小邊緣的要求，取得了較好的分離效果。
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