零次近似 的英文怎麼說
中文拼音 [língcìjìnsì]
零次近似
英文
zeroth order approximation- 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
- 次 : Ⅰ名詞1 （次序; 等第） order; sequence 2 [書面語] （出外遠行時停留的處所） stopping place on a jou...
- 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
- 近似 : approximate; similar; approach; approximation; roughness; propinquity
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Finally, in the third section, by constructing some functional which similar to the conservation law of evolution equation and the technical estimates, we prove that in the inviscid limit the solution of generalized derivative ginzburg - landau equation ( ggl equation ) converges to the solution of derivative nonlinear schrodinger equation correspondently in one - dimension ; the existence of global smooth solution for a class of generalized derivative ginzburg - landau equation are proved in two - dimension, in some special case, we prove that the solution of ggl equation converges to the weak solution of derivative nonlinear schrodinger equation ; in general case, by using some integral identities of solution for generalized ginzburg - landau equations with inhomogeneous boundary condition and the estimates for the l ~ ( 2 ) norm on boundary of normal derivative and h ~ ( 1 ) ' norm of solution, we prove the existence of global weak solution of the inhomogeneous boundary value problem for generalized ginzburg - landau equations
第三部分：在一維情形，我們考慮了一類帶導數項的ginzburg ? landau方程，通過構造一些類似於發展方程守恆律的泛函及巧妙的積分估計，證明了當粘性系數趨于零時， ginzburg ? landau方程的解逼近相應的帶導數項的schr （ ? ） dinger方程的解，並給出了最優收斂速度估計；在二維情形，我們證明了一類帶導數項的廣義ginzburg ? landau方程整體光滑解的存在性，以及在某種特殊情形下， gl方程的解趨近於相應的帶導數項的schr （ ? ） dinger方程的弱解；在一般情形下，我們討論了一類ginzburg ? landau方程的非齊次邊值問題，通過幾個積分恆等式，同時估計解的h ~ 1模及法向導數在邊界上的模，證明了整體弱解的存在性。Get the main conclusion as follows : when producing advantage enterprises in horizontal merger, if the figure of leaders enterprise do n ' t equal to zero, the horizontal merger motive exists, and under certain condition, this kind of horizontal merger will increase the social total welfare, this is exactly the reason why horizontal merger gets support ; when horizontal merger does not produce advantage enterprises, the condition that the motive exists is extremely harsh, and this kind of merger rises the product price and reduce the social total welfare ; when the market is couront market, if merging side ' s production capacity after merge ca n ' t reach optimum in theories satisfied, so long as its production capacity exceed the sum of optimum output of merger participate, merge motive exists, and horizontal merger will increase the social total welfare rises ; when high - level enterprises merge low level enterprises, because merging side ca n ' t get profit or those do n ' t participate in merger get more profit than merging side, motive
得到主要結論如下:當橫向並購產生優勢企業時，原先市場的領導層企業數目不等於零時，橫向並購動機存在，而且在一定條件下，這種橫向並購會使社會福利增加，這正是橫向並購得到支持的原因所在;當橫向並購不產生上優勢企業時，動機存在的條件極為苛刻，基本上與不產生優勢企業的假設相違背，可以認為這種並購的動機不存在，而且這種並購導致產品價格上升，社會總福利降低;如果市場近似古諾競爭市場，並購后並購方生產能力不能滿足理論上的最優產量，只要其生產能力超過並購前參與並購各方的最優產量之和，那麼並購動機就會存在，而且橫向並購會導致產品價格下降，社會總福利上升;當處于高層次的企業並購低層次企業時，由於並購者不能獲利或者未參與並購者獲利增加比並購方多，並購動機不存在或者很微弱。In this paper, we used the characteristics and introduced the delta operator to linear quadratic following control system, the results show that when sampling period is approaching to zero the results of the discrete - time system is approaching the continuous - time system, and the design of the following controller is completed by linear riccati equation
本文利用上面導出的delta運算元性質，把delta運算元應用於二次型跟蹤系統當中，得出了采樣周期趨近於零時delta域內的最優解趨近於相應的連續域最優解，並指出了離散域的輸出跟蹤器的設計可用連續riccati方程得到近似解。本文把delta運算元引入線性系統的廳。
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