discrete variation 中文意思是什麼
discrete variation
解釋
不連續變異-
An on - line minimum - variance estimator was developed for thrust acceleration applied to orbit transfer using discrete - time radar measurements. the mass - flow - rate of propellant was selected as a state variant, which was estimated by employing an integral state model and ekf filter. the variation equations for measurement vector to mass - flow - rate have been established to linearize the discrete - time measurement equations. the algorithm has applied successfully to maneuver process in commanding satellite into geo - stationary orbit. the results show that the algorithm developed here can monitor and determine whether engine works well or failure precisely and quickly during orbit transfer process
飛行器軌道機動過程中，為跟蹤、定位機動目標和干預機動控制過程，需要統計處理離散的雷達觀測量實時估計推進發動機的推力，進而確定飛行器的瞬時軌道參數.本文所述演算法是該工程問題的探討和解決方案.文章建立了軌道機動過程中連續變質量運動模型和離散雷達量測模型，推進發動機的質量秒耗量作為表徵推力加速度的一個近似常量，應用擴展卡爾曼濾波對離散的雷達測量數據進行順序統計處理給出秒耗量的最小方差估計;文章詳細地推導了線性化量測模型的變分方程和觀測矩陣;模擬結果表明該演算法能快速、準確地估計推進發動機的質量秒耗量和向機動目標施加的實際推力 -
So there are both continuous and discrete in the progress ( id fact, we always meet such a progress with both continuous and discrete variation during studying the biological model ). then we can model the progress by a dynamic equation on tune scales to solve it easily. since the last decade, there have been much advance on the dynamic equations on time scales
那麼這個過程既有連續的又有離散的（事實上，在描述生物種群狀態的生物模型中我們經常會遇到象這樣的一個變化過程中同時具有連續的和離散的變化） ，我們就可以用一個時間模上的動力學方程來描述，進而用時間模上的運算對此加以解決，那麼問題處理起來就簡單方便了。
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