direct dynamic problem 中文意思是什麼
direct dynamic problem
解釋
動力學直接問題-
The direct root - finding method, as a conventional method for analyzing transient heat conduction of wall, will produce much inevitable problem such as root - missing and low efficiency. at all times, people quested for more efficient and simple method to analyze its dynamic heat conduction
傳統的分析墻體不穩定傳熱的方法?直接求根法存在失根、效率低下等諸多問題，一直以來，人們不斷尋求更加簡單、更高效率的方法來分析其動態傳熱過程。 -
One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system
第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。 -
Direct dynamic problem
動力學直接問題 -
This algorithm focuses the key problem of path planning on the dynamic center and can direct robot to carry out safe motion in dynamic uncertain environment. the simulations and the practices of robot contest indicate that the control system of " giant " and the dynamic center algorithm acquire some achievements and are feasible
動態圓心法是基於全局規劃的局部規劃方法，使機器人路徑規劃的中心都集中到了動態圓心上，以動態圓心的運動為控制量，驅動機器人實現在動態不確定環境下的安全運動。 -
The penalty function method first change the optimization problem with constraints to no constraint problem then solve the no constrains optimization problems using hooke - jeeves direct search method. the above method only use the dynamic analysis result together with penalty function method to solve the multibody desigen optimization problems, and separate the process of dynamic analysis and design optimization, so it is more common
由於該方法是將約束優化問題轉化為無約束優化問題，針對無約束優化問題，本文採用通用的hooke - jeeves直接探索優化方法，有效的實現了多體系統動力學分析與優化設計的分離，從而具有通用性。 -
In the parallel computation, there are two strategies, namely sbs and ebe ; for the nonlinear problem solution, there are direct and iterative algorithms, but for dynamic analysis there are explicit and implicit integration, and high precision direct integration
有限元并行計算有sbs 、 ebe兩種策略，非線性求解有直接與迭代解法，動力時程分析有顯式、隱式和精細時程積分法。
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