quadratic system 中文意思是什麼
quadratic system
解釋
四方晶系-
The prospect geological disaster geographic information system is based on the visual basic, and make use of mapobject of esri corporation to do then quadratic programming of cis, connected with the mapobject prepotency of geological information system
地質災害勘察綜合地球物理信息管理與解釋系統是在visualbasic的基礎上，利用esri公司的mapobject軟體進行gis的二次開發，把visualbasic的強大的平臺和mapobject地理信息系統方面的優勢緊密的結合在一起。 -
The quadratic nonlinear term and the cubic nonlinear term that coexist in equation ( 1 ), thus causes difficulty in studying this sort of system through the analytical method and correspondingly makes the solution of analytical expression of homoclinic orbit or heteroclinic orbit in hamilton system extremely difficult
二次非線性項和三次非線性項共同存在於方程（ 1 ）中，使得用解析方法研究這類系統的難度增大，對應hamilton系統中的同宿軌道或異宿軌道的解析表達式的求解相當困難。 -
The results prove that df could simplify the solve process and its shortcoming of restriction in approximately denotation, frequency unitary 1 and inapplicability in more commonly quadratic system are also shown at the same time
結果證明：使用描述函數法能夠簡化該問題的求解，但也暴露出其存在著近似表示，頻率歸1以及更一般二階系統不適用等方面的局限和不足。 -
With the basis of the system of nonlinear equations which is established by minimizing the error quadratic sum of theoretical and actual shaded value of the points on the typical surface, the parameters of the illumination models can be firstly determined by means of the least - square procedure
首先，以典型曲面上各點的理論灰度值與實測灰度值的誤差平方和最小為目標建立非線性方程組，以非線性最小二乘理論為基礎，通過解非線性方程組確定光照模型各個參數值。 -
With the basis of nonlinear least squares theory, the system of nonlinear equations is established by minimizing the error quadratic sum of theoretical and actual gray level of the points on the typical surface, and the parameters of the illumination models can be determined by means of the least - squares procedure
以非線性最小二乘理論為基礎，以典型曲面上各點的理論灰度值與實測灰度值的誤差平方和最小為目標建立非線性方程組，通過求解非線性方程組來確定光照模型的各個光照參數。 -
( 3 ) the theory of morden optimal control is used for the controller design of the active vibration isolation system. two algorithms, instantaneous optimal control and linear quadratic gauss optimal control, have been discussed and compared. an instantaneous optimal closed - loop control algorithm in structural space is derived by using the newmark scheme
（ 3 ）應用最優控制理論設計控制器，對瞬時最優控制和線性二次型gauss （ lqg ）閉環控制方法進行研究和對比，並導出構形空間內的瞬時最優閉環控制演算法。 -
We have deduced the iterative formula by the theory of the dynamic system, proved that the quadratic convergence holds under the weak conditions, and done the numerical experiments
利用動力系統理論推導出該方法的迭代公式，證明其在某些弱條件下至少是二階收斂的，最後給出了數值結果。 -
To explore why the ratio of collectable wort extract is higher than that of non - extruded, the influences of all parameters of rice extrusion system ( barrel temperature, material moisture, screw speed ) on resistant starch content of extuded rice were studied by using second - order quadratic orthogonal rotating combination design method
摘要為探索擠壓蒸煮大米啤酒輔料麥汁浸出物收得率高於傳統不擠壓蒸煮啤酒輔料收得率的原因，用二次正交旋轉組合試驗法設計安排試驗，研究了大米擠壓蒸煮系統諸參數（套筒溫度、物料含水量、螺桿轉速）對大米抗性澱粉含量的影響規律。 -
According to location optimum means of passive control devices based on active control theory, the method using system index delicacy and system index increment to solve linear quadratic objection function is improved. thus such cases as repetitive location of ved can be taken into account
根據主動控制理論的被動控制器位置優化，改進了採用系統指標靈敏度和系統指標增量實現二次型目標函數的方法，使其能考慮ved位置的重復放置情況。 -
It is superior to passive vibration isolation system, and also to the general active - passive hybrid vibration isolation system. the functions of the weighting matrices q and r are analysed and the conclusion is obtained that instantaneous optimal control algorithm is superior to linear quadratic gauss when choosing the same weighting matrices
（ 4 ）用計算機模擬驗證了智能結構主動隔振的有效性和優越性；分析了加權矩陣對控制系統的影響並探討其選取方法；證明了在加權矩陣選取相同時，瞬時最優控制優于lqg控制。 -
By using the method of qualitative analysis, phase portraits for a class of quadratic differential system are investigated. nine phase portraits are found and shown for this system
用定性理論方法研究了一類二次微分系統的相圖，得出該類系統的相圖共有9種，並且給出了這9種相圖 -
On the other hand the research about dry friction system response calculation method is limited in passive control system. in this article, the precise solution to the linear quadratic optimal control system with load is analyzed firstly, and then a gradually deduced response solution method of lq control dry friction system is brought forward
另外人們對干摩擦系統響應計算方法的研究大都局限於不受外載的控制系統，本文在研究外載作用下lq控制系統riccati方程精確解法的基礎上，也提出了干摩擦lq控制系統響應計算的遞推求解方法。 -
For a nonlinear system with time - delay, the optimal control problem based on quadratic performance indexes is usually transformed to a nonlinear two - point boundary value problem with not only time - delay terms but also time - advance terms. therefore, this kind of optimal control problem is especially difficult to be solved, no matter exact solutions or numeral solutions
對于帶時滯的非線性控制系統，其基於二次型性能指標的最優控制問題往往轉化為一個既有時間滯后項又有時間超前項的非線性兩點邊值問題，因此解決這一類控制問題尤其困難，不論是求其精確解還是數值解。 -
Creation and disappearance of limit cycles in quadratic system
0類二次系統極限環的產生與消失 -
The planar quadratic system with an invariant cubic curve has at most one limit cycle
類方程的極限環存在性的注記 -
Limit cycle problem of quadratic system n
0的極限環問題 -
Sufficient and necessary conditions of existence of limit cycle for one kind quadratic system
一類二次系統極限環存在的充要條件 -
At the end of this paper we talk about the question of the maximal number of limit cycles in quadratic system and some applied uses in ecological circumstances
在本文的最後略為涉及hilbert第十六問題中的極限環的個數問題及其在生態環境上的應用。 -
By using the known results of type quadratic system, we analyse thecreation and disappearance of limit cycles for type system as a = 0, and obtainsome new topological structures of phase - portraits, which do not appear for type system
利用關于類二次系統的已知結果，在此文中我們系統分析了類二次系統當= 0時其極限環的產生與消失的整個過程，並給出了一些新的拓撲結構變化，它們在類系統中是不會出現的 -
In this paper we will prove that quadratic system has at most finitely limit cycles. bamon claimed that he had finished the demonstration of the finiteness of limit cycles, but he used il ' yashenko theorem, which involves some knowledge of complex domain, so it is the main idea to give il ' yashenko theorem an elementary proof in this paper
本文將用純初等方法研究二次系統極限環的有限性，雖然bamon宣布已經完成了二次系統極限環的有限性證明，但其證明過程中用到了涉及復域的il ' yashenko定理，從而給il ' yashenko定理一個初等的證明是本文的主要思想。
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