second-order systems 中文意思是什麼
second-order systems
解釋
二階系統-
Symmetric homoclinic orbits for second order hamiltonian systems
系統的偶同宿軌 -
The addition formula of spherical harmonics function of degree n and order 1 is derived using the relations between coordinate varieties after coordinate rotating and the property of the associated legendre polynomial. the relations among the magnetic vector potential, the modified magnetic vector potential and the second - order vector potential ( sovp ) are shown going forward one by one. it is explained that the solutions of electromagnetic fields in different coordinate systems can be transformed and an example having analytical solution is given
利用坐標旋轉后球坐標變量間的關系和連帶勒讓德多項式的性質推導得到了n次1階球諧函數的加法公式；以遞進的方式說明磁矢量位、修正磁矢量位與二階矢量位的關系，寫出了引入二階矢量位的過程；以時諧場矢量邊值問題為例，闡明了不同坐標系下電磁場解的相互轉化原理，給出了一個解析解的轉化例子；在球坐標下，引入了較球矢量波函數更普遍的兩類矢量函數，給出了其在球面上的正交關系。 -
On the oscillation of second order linear matrix differential systems
二階線性矩陣微分系統的振動性 -
Existence of periodic solutions with saddle point characteristics for some non - autonomous second order systems
某類非自治二階系統具鞍點特徵的周期解的存在性 -
Upper and lower bounds of eigenvalues of uncertain closed - loop systems with second - order perturbation
不確定性閉環系統特徵上下界的二階攝動法 -
During this evolution, seven second - order tectonic units were formed ; from north to south are the mingqianri cretaceous residual sea basin, the arsuo tectonic melange zone, the taricuo - wenbu yenshan magmatic arc belt, the cuoqin - bangduo late paleozoic composite back - arc basin, the jiangrang - geerdi faulted uplift, the gangdise - chazi himalayan magmatic arc belt, and the xigaze - anba fore - arc basin. these units comprise important parts of a poly - arc - basin system and exhibit evolutional features of mesozoic to cenozoic arc - basin systems. mosaic pattern of these tectonic units delineates the lithosphere coupling processes of the gangdise tectonic belt under mechanisms such as back - arc basin attenuation and arc - continent collision
自中新生代以來，岡底斯構造帶經歷了洋殼俯沖、弧陸碰撞、陸內俯沖-碰撞、走滑和塊段隆升的多階段構造演化歷程，形成了由北向南七個二級構造單元，即岷千日白堊紀殘余海盆、阿索構造混雜巖帶、它日錯?文部燕山期巖漿弧帶、措勤?幫多晚古生代復合弧后盆地、江讓?格爾耿斷隆、岡底斯?查孜喜馬拉雅期巖漿弧帶、日喀則?安巴弧前盆地。 -
On convergence of solutions for a class of second - order differential systems
一類二階微分系統的解的收斂性 -
The paper is concerned with periodic solutions to nonautonomous second order hamilton systems where, m : [ 0, t ] - s ( rn, rn ) is a continuous mapping in the space s ( rn, rn ) of symmetric real ( n x n ) - matrices, such that for some u > 0 and all ( t, z ) [ 0, t ] x rn, ( m ( t ) x, x ) > u | x | 2. a s ( rn, rn ), f : [ 0, t ] x rn r is continuous and f : [ 0, t ] xr r exists, is continuous and we study the existence of periodic solutions of the systems by using ekeland variational principle and the saddle points theorem. we suppose that the nonlinearity vf and potential f belongs to a class of unbounded functional. our work improves the existed results. we obtained the results of multiplicity of periodic solutions of the systems by using lusternik - schnirelman category theory and the generalized saddle points theorem, and the functional does not need the condition of constant definite. at last, we obtained the existence of infinity many distinct periodic solutions of the corresponding non - perturbation systems by using the symmetric mountain pass theorem
（ ? ， ? ）為r ~ n中內積， | ? |為對應范數。 f [ 0 ， t ] r ~ n r連續， ? f （ t ， x ）存在且連續， h l ~ 1 （ 0 ， t ； r ~ n ） 。利用ekeland變分原理和鞍點定理討論了該系統周期解的存在性，把非線性項和位勢函數放寬到一類無界函數，推廣了這方面工作的一些已有結果；利用廣義鞍點定理和lusternik - schnirelman疇數理論得到了該系統的多重周期解，取掉了泛函的常定要求；最後利用對稱山路定理得到沒有擾動時系統的無窮多周期解。 -
Comparing fuzzy control with optimal control, it is found that the fuzzy control of a class of second order systems is actually a near - optimal control
通過二階系統的模糊控制和時間最優控制的對比發現，一類二階系統或可近似為二階系統的模糊控制實際上是對二階系統最優控制的一種近似。 -
The simulation results show that this method is effective and successful with strong robustness, and can also be used to some other linear or nonlinear second order systems
理論分析和模擬表明，這種基於時間最優控制的非線性設計方法具有很好的控制效果和魯棒性，適用於一類二階系統的控制。 -
The asymptotical convergence of the identifier is proved. a discrete variable structure control algorithm with time - varying sliding surface is developed for a class of second - order uncertain discrete systems
針對一類二階不確定離散系統，利用離散變結構控制系統所具有的滑動模態區，提出了一種具有強魯棒性的時變滑模面離散變結構控制方法。 -
Uniaxial motion, fixed - axis rotation ; first and second order systems ; natural and forced response ; transfer functions, zeroes, poles ; elementary control : open - loop, closed - loop ; closing the loop alters the natural and forced response characteristics ; stability and instability
003單軸運動，固定軸的轉動，一階與二階系統，自然與強迫響應；轉移函數，零點，極點；基本控制：開迴路，閉迴路；回授對自然與強迫響應特性之改變；穩定與不穩定。 -
On the reflective function and the periodic solution of the second order differential quadratic systems
二次微分系統的反射函數及其周期解 -
We apply this condition and elementary properties of fourier series to prove a uniqueness theorem for periodic solutions of a class of second order nonlinear ordinary differential systems
我們應用這個條件和傅立葉級數的基本性質證明了二階非線性常微系統周期解的唯一性定理。 -
Exact boundary controllability for second order quasilinear hyperbolic systems
二階擬線性雙曲型方程組的精確邊界能控性 -
By means of the existence and uniqueness of semi - global c1 solution to the mixed initialboundary value problem with general nonlinear boundary conditions for first order quasilinear hyperbolic systems with zero eigenvalues, we establish the local exact boundary controllability for second order quasilinear hyperbolic systems with general nonlinear boundary conditions
本文利用具零特徵的一階擬線性雙曲型方程組帶一般非線性邊界條件的混合初-邊值問題的半整體c1解的存在唯一性，對具一般類型非線性邊界條件的二階擬線性雙曲型方程組建立了精確邊界能控性 -
Positive solutions of boundary value problems of some singular second order systems
一類奇異二階系統邊值問題的正解 -
Existence of two positive solutions to boundary value problems of second order systems
二階微分方程組邊值問題2個正解的存在性 -
Existence of periodic solutions for a class of second order systems with sublinear nonlinearity
一類帶有次線性非線性項的二階系統周期解的存在性 -
Multiplicity of periodic and subharmonic solutions to second order nonhomogeneous nonlinear difference equations and systems
二階非齊次非線性差分方程與方程組的次調和周期解的多解性
分享友人