隨機矢量 的英文怎麼說
中文拼音 [suíjīshǐliáng]
隨機矢量
英文
random vector-
A mathematical model reflecting the tilt rotor unsteady and nonlinear aerodynamic characteristics in the longitudinal channel is presented in the paper. in the full flight envelope, the rotor thrust continues tilting and the aerodynamic forces of each component change as a function of airspeed and nacelle angle
在整個飛行包線內，旋翼的推力矢量方向不斷變化，飛機各部件的氣動力隨發動機短艙傾角和空速的變化而變化，因而飛機的飛行動力學有很強的非定常、非線性特性。Because ga possesses the traits of can global random search, the robustness is strong, been use briefly and broadly, it didn ’ t use path search, and use probability search, didn ’ t care inherence rule of problem itself, can search the global optimum points effectively and rapidly in great vector space of complicated, many peak values, cannot differentiable. so it can offset the shortages of nn study algorithm, can reduce the possibility that the minimum value get into local greatly, the speed of convergence can improve, interpolation time shorten greatly, the quantity of training reduce
因為遺傳演算法具有全局隨機搜索能力，魯棒性強、使用簡單和廣泛的特點，它不採用路徑搜索，而採用概率搜索，不用關心問題本身的內在規律，能夠在復雜的、多峰值的、不可微的大矢量空間中迅速有效地尋找到全局最優解，所以可以彌補神經網路學習演算法的不足，使陷入局部最小值的可能性大大減少，使得收斂速度提高，訓練量減小。In this paper, a new control strategy based on the adaptive deadbeat voltage space vector is presented. this control scheme has a lower sample frequency and a smaller difference between switch frequency and sample frequency. it has many advantages, such as producing zero vectors organically, tracing exactly, non - shaking, etc. and its dynamic response is better
對于電能質量調節器來講， pwm跟隨指令參考信號的控制性能在很大程度上影響著裝置的補償效果，本文選擇無差拍電壓空間矢量控制為系統控制策略，這種控制方法具有采樣頻率低，開關頻率與采樣頻率的差距小，能有機地產主零矢量、跟蹤精確以及無抖振等優點，動態響應快。Motion control is a comprehensive subject. modern ac drive is a important embranchment in the field of motion control. however, it is difficult to rea1ize high - performance ac drive systems because induction motors are a kind of strongly - coupled nonlinear system with many variables and the torque is not easy to control. with vector control technology decoupling and torque control of ac motor are solved. the basic idea of vector control is that three - phase system is equiva1ent to two - phase system by coordinate transformation and it realizes the decoupling between field current and torque current of the stator in order to control the flux and current respectively, thus induction motor can be considered dc motor and high performance is achieved easily. with the progress of electric and electronic technology and the development of computer, high - integrated special modules and high - precision digital signal processor ( dsp ) are applied to ac drive so that vector control has been developed rapidly
但是高性能的交流調速系統實現很困難，這是因為交流電機是多變量、強耦合的非線性系統，不易實現高性能轉矩控制。矢量控制技術則解決了交流電機解耦與轉矩控制問題，其基本思路? ?應用坐標變換將三相等效為二相，實現定子勵磁電流分量與轉矩電流分量之間的解耦，達到對交流電機磁鏈與電流分別控制的目的，交流電機等效為直流電機實現高性能調速。隨著電力電子技術的進步，計算機技術飛躍發展，高度集成的專用模塊和高精度的數字信號處理器應用於交流傳動系統中，促進矢量控制迅猛發展，日趨成熟。This treatise has researched on the construction of structured ldpc codes, including eg, bibd, semi - random - rotation and an approach based on vector - matrix proposed by us and compared random construction and structured construction through theoretical analysis and simulation. we also compared several structured codes
本論文研究了結構化ldpc碼的構造，包括基於歐氏幾何空間的eg （ euclideangeometries ）方法、基於組合代數的bibd （ balancedincompleteblockdesign ）方法、半隨機半結構化的-旋轉構造法，以及我們提出的基於矢量矩陣的結構化構造方法。According to the data of the covariance - stationary stochastic time series, we can get the state space modeling algorithm quickly and stably by singular value decompositi on and orthogonal projection. this algorithm will be faster and more stable
在已知平穩隨機時間序列樣本數據的情況下，論述了如何採用正交投影演算法和正交奇異值演算法建立隨機時間序列的狀態空間模型和狀態矢量估計，這種數學建模方法對于船舶機艙中的系統數學建模有很大的幫助A stochastic competitive learning vector quantization algorithm for image coding
一種隨機競爭學習矢量量化圖像編碼演算法The typical technology for ac motor control has vvvf, vsvf, vc and dtc etc. direct torque control ( dtc ) of asynchronous motors, which has been developed in the recent decades, is a power control method for motor drives
交流電機控制技術具有代表性的有調壓調頻控制、轉差頻率控制、磁場定向控制（矢量控制）以及隨后出現的直接轉矩控制（ dtc ）等。In order to encode the parameters of sinusoidal model, the vector quantization techniques for amplitude parameters and the differential quantization for frequency parameters are proposed and discussed. at the same time, the frequency bin model, the random phase model and the zero phase model are also discussed
針對正弦模型參數的量化編碼，提出了幅度參數矢量量化、頻率參數差分量化等方法，並探討了頻率盒量化模型以及隨機相位和零相位模型等。Last but not least, the simulated and experimental systematic output proves the validity of the random space vector pwm, which is considered producing the input action of the system
提出一種基於電壓空間矢量調制的隨機pwm新演算法，實現有限狀態之間的隨機轉換，並能與提高開關頻率有效結合。In this paper, a feasibility study of the random space - vector pulse width modulation ( pwm ) scheme is reported aiming at the noise reduction by power inverters
針對交流調速裝置中的噪聲問題，論文研究了一種新興的pwm技術- - -隨機空間矢量pwm技術。With the development of the computer, autocontrol technology and the electron and electric power technology, the performance of the frequency conversion of ac drive has been improved greatly, and some new technique such as vector control and direct torque control have been applied widely
隨著電力電子技術、計算機技術和自動控制技術的迅速發展，交流電機變頻調速技術的性能指標已有很大提高，新型調速技術如矢量控制和直接轉矩控制已得到了越來越廣泛的應用。同時，交流變頻調速的控制技術也在不斷進步和完善。分享友人