numerical experiments 中文意思是什麼
numerical experiments
解釋
數值實驗- numerical : adj 數字的；數值的；用數字表示的。 （a） numerical order 號數。 a numerical statement 統計。 the ...
- experiments : 實驗，153
-
Both theoretical proof and numerical experiments indicate that this algorithm is convergent and effective for solving large - scale semidefinite programming. in the following section, we work over the bisection problems
數值實驗與理論分析均表明該演算法適用於求解大規模問題，且具有良好的收斂性；其次，研究了電路二等分問題。 -
Furthermore, we made a great deal of numerical experiments and the numerical results suggest that the new 9 parameters triangular element is more effective than robust element, and the new 12 parameters rectangular element is more effective than the 12 parameters one in [ 5 ], acm, and the non - complete biquadratic rectangular element
0 ）的收斂性，並進行了大量數值實驗，結果表明：新的9參三角形元比robust非協調元，新的12參矩形元已有的12參矩形元， acm元，不完全雙二次矩形元數值效果都要好 -
Used perturbed method and making inexact generalized gradient projection with cone, perturbed generalized gradient projection method is proposed. the field of the algorithm is extended. numerical experiments show that the method is effective. secondly, using the trust region form and the pseudo - directional derivative of minimax problem, we propose the trust region form of minimax problem
對信賴域法作了進一步的研究，藉助minimax問題的偽方向導數，構造出其信賴域二次模型，並結合非單調策略，給出求解minimax問題的簡單易行的信賴域演算法。 -
With two - dimensional quasi - geostrophic motion, a series of numerical experiments are made to prove the theoretical results
； gj ）傳統識別模式誤差和奶始誤差的方法，是把一系列的初始場輸入到。 -
The numerical experiments of aerosol radiative effects
對大氣氣溶膠的輻射效應的數值試驗 -
Results of recent observation and numerical experiments show that prominent difference exists between air - sea interaction in tropical and in mid - latitude, and work is not enough related to the impact of persistent ssta on the circulation considering different district in pacific
觀測分析和數值模擬結果表明中緯度與熱帶地區的海氣相互作用存在差異，但深入討論不同關鍵海區的持續性ssta對大氣環流影響的工作還不充分。 -
Finally, numerical experiments are carried out to weigh the influence of the artificial dissipation coefficient a and the pseudo - compressibility coefficient
另外，本文也對人工耗散系數和人工可壓縮系數對數值計算的影響進行了實驗。 -
In the last of this paper we apply our algorithms to the learning of feed - forward neural network, and get some new learning algorithms. we also give some numerical experiments to compare our algorithms with others
最後，將得到的這些優化加速收斂方法應用到了多層前饋神經網路的學習過程，給出了加速收斂的bp演算法，通過實際神經網路學習問題驗證了工作的成效。 -
Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter, and the we find that : a. the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor. thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered
本文的第四章通過一系列模型試驗詳細探討了利用射線反演方法反演速度和深度參數的實際步驟，認為走時反演對速度層內頂部和底部速度變化的分辨能力很弱，僅僅依靠走時數據難以反演出層內頂部和底部的速度變化，故一般情況下應採用速度層底部和頂部速度相同的縱向均勻模型。 -
2. nonlinear source term identification problem about a quasilinear parabolic heat equation is investigated. for the given function determined, the existence and the uniqueness of the solution of the state equation are proved and the dependence of the solution of the state equation on the identification parameter is discussed ; then the identifiability is verified ; through choosing suitable basic functions, the above identification problem can be transformed into a constant coefficients identification problem ; and an practical iterative algorithm for solving the identification problem is presented, the feasibility and validity of the algorithm is verified by the numerical experiments
2 、研究一擬線性拋物型熱傳導方程非線性未知源項的識別問題；對于給定識別函數，論證了狀態方程解的存在惟一性、方程解與識別函數的依賴關系和可識別性；通過選取適當的基函數，把對非線性源項的識別轉化成常系數識別問題；給出了實現非線性源項識別的迭代演算法，通過數值實驗證明了演算法的有效性。 -
Numerical experiments on the impact of land cover on climate
土地覆被對氣候影響的數值模擬實驗 -
The two different boundary conditions considered are simply supported and fixed end support, and the different damage forms ( crack characteristics ) are investigated by numerical experiments
對不同的邊界條件（如簡支梁和固端梁）下不同的損傷形式（如豎直裂縫和斜裂縫）引起結構損傷的情況進行試驗。 -
This paper applies generalized multipler method to translate convex quadratic programs with equal constraints and non - negative constraints into simple convex quadratic programs with non - negative constraints. the new algorithm is gotten by solving the simple quadratic program. it avoids the computation of inverse matrix and exploits sparsity structure in the matrix of the quadratic form. the results of numerical experiments show the effectiveness of the algorithm on large scale problems
根據廣義乘子法的思想，將具有等式約束和非負約束的凸二次規劃問題轉化為只有非負約束的簡單凸二次規劃，通過解簡單凸二次規劃來得到解等式約束和非負約束的凸二次規劃新演算法，新演算法不用求逆矩陣，這樣可充分保持矩陣的稀疏性，用來解大規模稀疏問題.數值結果表明：在微機486 / 33上就能解較大規模的凸二次規劃 -
We have deduced the iterative formula by the theory of the dynamic system, proved that the quadratic convergence holds under the weak conditions, and done the numerical experiments
利用動力系統理論推導出該方法的迭代公式，證明其在某些弱條件下至少是二階收斂的，最後給出了數值結果。 -
One of its most important applications is to improve the optimization algorithms by evaluating the relevant derivatives information efficiently the aim of the work includes : to establish and study new algorithms - - cf - pcg algorithrns with ad ; to establish and study the extended cf - pcg algorithm ( ecfpcg ). cf - pcg algorithms with ad is proposed on the basis of cf - pcg algorithms with sd, in addition to replace sd with ad, there are other significant modification to the algorithms. the results by theoretical analysis and numerical experiments implicate that cf - pcg algo - rithm with ad is an improvement to newton method with ad
論文首次將自動微分應用於牛頓- pcg型演算法，構造了新演算法，並從理論上比較了新演算法與牛頓法的效率，證明了新演算法的效率嚴格大於牛頓法的效率，而且新演算法與牛頓法的效率比分別是問題維數n和目標函數復雜性的嚴格單調遞增函數，當n趨于無窮大時，這個效率比的下界以ln （ n ） ln2的速率趨于無窮大。 -
Anisotropic convergences of some famous finite elements are also analyzed, and a lot of numerical experiments have been carried out - many applicable triangular and rectangular elements have been developed for the plate bending problems, some of them are conforming and some of them arc unconforming, but the researches on quadrilateral piar. e elements have been seldom reported
對薄板彎曲問題，已提出了很多適用的三角形元和矩形元，有協調的，也有非協調的。但關于任意四邊形板元的研究尚不多見。對于矩形元，從參考元（ -
According to the demands of weapon composites underwater, such as bearing the hydrostatic pressure of 6. 0mpa, no leak and damage in two years, the leakproof method is worked out with the numerical experiments, namely adding the leakproof laminate between the winding laminates
根據水中兵器用復合材料必須耐60mpa外水壓，在水中2年不滲漏、不破壞等一系列性能要求，通過大量的實驗確定了防滲方案，即在殼體纏繞過程中將防滲漏層加入兩纏繞層之間。 -
The weather analysis and climatic characteristics of the heavy - hard rainfall in this area, structure characteristics during the rainstorm, the mechanism and structure of mesoscale systems bringing rainstorm and etc. are studied by conducting diagnostic analysis, theory of dynamics and numerical simulation. the influence on the rainstorm causing by mesosc ale topography piling on the plateau, the particular valley topography in northeast plateau and complex surface vegetation are researched by numerical experiments
本論文試圖採用診斷方法、診斷和天氣動力學理論相結合的方法、數值模擬等方法對高原地區大到暴雨的天氣、氣候特徵，暴雨產生時的物理量場特徵、產生暴雨的中尺度系統的發生機理和結構特徵等方面進行研究，對疊加在高原上的中尺度地形、高原東北部特殊的外流河谷地形及復雜下墊面性質對暴雨的可能影響進行數值試驗，以揭示高原暴雨發生發展的物理機制。 -
In the suspended sediment transport model, the method of shear stress is adopted to determine the source function in the suspended sediment diffusion equation. through a series numerical experiments and statistical analyses of observed field data, a local coefficient, which can reflect the bottom material and consolidation, is introduced into the classic critical erosion velocity of the sediment
懸沙輸運模型利用切應力方法來確定對流擴散方程中的泥沙源函數，其中的臨界起動速度利用經典的泥沙起動流速公式前面增加一個局地系數得到，這個系數能反映河床底質結構及固結程度，通過系列數值試驗和實測資料的統計分析確定。 -
In fact, we have done theoretical analysis and a series of numerical experiments, which show that for the nine - point scheme applied to a system of two - dimension three - temperature equations over an irregular quadrangle grid, both the local accuracy and global accuracy are very disappointing
事實表明九點格式僅在均勻平行四邊形網格上具有較好精度，在一般的不規則四邊形網格上，其局部及整體精度都是非常令人失望的。
分享友人