spreading parameter 中文意思是什麼
spreading parameter
解釋
擴展參數-
It compute the parameter of deflexion caused by thermal distortion in orbit, deduce the general expression for spreading beam after thermal distortion of reflector and the center deflexion of facula received in ccd. with the method of fixing etc, it put forward the restrain measures adopted accordingly
計算了在軌運行條件下反射鏡面熱變形引起的表面法向偏轉參數，推導了鏡面變形后出射光線的通用表達式以及鏡面變形前後在ccd探測器上的接收光斑中心偏轉量的計算表達式。 -
Obtained by emtp program and the egm, this paper studies on lightning protection performance on 500kv double circuit transmission line the distributed parameter model of tower is built when analyzing the back stroking lightning protection performance for double circuit line, it can truly reflect the spreading course of lightning current on the tower, furthermore, considering the randomness of working voltage ' s phase when lightning strokes the top tower and supposing the probability of lightning appearing arbitrary phase in a cycle of ac is equal, this paper brings forward the statistical method to calculate the rate of back stroking on double circuit line
本文利用emtp程序、擊距法對500kv同桿雙回線路的耐雷性能進行了研究。在分析同桿雙回線路的反擊耐雷性能時，建立了桿塔的分佈參數計算模型，此模型可以真實地反映雷電流在桿塔上的傳播過程。並針對雷擊塔頂時，導線運行電壓相位角的隨機性，本文假定雷擊出現于交流一周期的任一角度區間內的概率相等，提出了利用統計法計算同桿雙回線路的反擊跳閘率。 -
The innovations of this thesis are as the follows : 1 ) it is analyzed that the lower - order jacobi - anger expansion model for an incoherently distributed source has better accuracy performance than some other approximate source models such as space frequency model, two - point source model, and low - rank approximate model. using the parametric decoupling property of the ja - based model, a novel angular parameter estimator is proposed, which is very robust in case of large angular spreading
本文從這三個方面開展了空間分佈源波達方向估計研究，創新點包括： 1 ）分析了低階jacobi - anger級數展開近似模型的誤差性能；利用該近似模型的參數解耦特性，提出了一種新的波達方向估計器，在大角度擴展條件下，該估計器表現非常穩健。
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