攝動定理 的英文怎麼說
中文拼音 [shèdòngdìnglǐ]
攝動定理
英文
perturbation theorem-
Secondly, programmed the image processing arithmetic code which include the bottom arithmetic for the general condition comprises threshold division, region combination and informate and the middle level arithmetic for the given task comprises detecting the line dation creirection according to the hough transform in order to fix on the hole ’ s azimuth angle, detecting the aiguille tip position according to the image movement according to the environment and the image format
然後,根據目標環境要求和攝像機採集圖像格式,開發了圖像處理演算法程序。圖像處理演算法包括底層演算法和中層演算法兩部分,底層演算法針對通用情況,包括閾值分割、區域合併和信息生成。中層演算法針對具體任務設計,包括利用hough變換檢測棱線的方向,從而確定圓孔的方位角和利用基於圖像運動檢測鉆頭尖端位置。Materials and methods : in this study, we describe an automatic segmentation algorithm to extract contrast medium enhanced esophagus in x - ray fluoroscopy
材料與方法:本研究是利用模擬攝影中,藉由吞食鋇劑后之透視影像,利用影像前置處理、邊緣偵測、和邊緣定位來自動搜尋食道影像邊緣。Second, we discuss the influence of environmental referance potential temperture and thermal wind on mesoscale symmetric instability. we find the expression of disturbance stream function and criterion of symmetric instability by analytical method and conclude that change caused by environmental referance potential temperture with height and thermal wind make critical richardson number and disturbance critical half - wave length of symmetric instability larger, that is to say, they benefit the occurance of symmetric instability. third, we study nonlinear perturbation analysis of mesoscale vertical circulation and evolution equation by means of f - plane. non - hydrostatic balance and filiter model
第二,討論了環境位溫與熱成風因子對中尺度對稱不穩定的影響。運用解析的方法求出了擾動流函數的表達式和對稱不穩定的判據,發現環境參考位溫隨高度的變化與熱成風因子使得對稱不穩定臨界理查遜數及擾動的臨界半波長都變大,這有利於對稱不穩定的發生。第三,採用f平面、非靜力平衡、濾聲波模式,討論了中尺度垂直環流非線性攝動分析及演變方程。Second, it presents the project design of an astronauts ’ kinetic measurement system that can precisely measure the forces and moments of key points on motorial person. it presents a principle and flow of the project design of an astronauts ’ kinetic measurement system. and it particularly discusses the demarcate of camera system, the gathering and storage of experiment pictures, pick - up of the symbol data, the parameter calculating method of target movement, and the general design of assistant equipment
然後給出航天員作用力測量實驗系統的設計方案,該系統能夠克服重力影響,較精確地得出運動時人體各關鍵點產生的力和力矩;給出了航天員運動參數測量實驗系統的原理及流程,並詳細論述了攝像系統標定,實驗圖像的採集與存儲,標志點數據的提取及目標運動參數解算的方法;給出了輔助設備的概要設計。This paper is concerned with, the existence and stability of travelling wave solutions for the viscous balance law which is an extension of viscous conservation law where a reaction term g ( u ) is added. l ) the existence of travelling wave solutions by geometric singular perturbation method, we investigate the existence of travelling waves ( a2 ) connecting a saddle point and a sink point and the existence of viscous shock waves c connecting two adjacent or disadjacent saddle points. by giving a detailed analysis of the fast and slow manifolds and verifying the transversality of the intersection of singular stable and unstable manifolds of the reduced problem along the singular heteroclinic orbit, we obtain the existence of travelling waves ( a2 ) in the case of a convex flow function / and that of viscous shock waves c under the assumption that f " is bounded
主要結果如下: 1 )行波的存在性本文利用[ 37 ]中幾何奇異攝動理論,通過仔細分析= 0時的快流、慢流,驗證= 0時慢流方程的穩定與不穩定流形橫截相交於奇異異宿軌道,先在f為凸的條件下嚴格證明了( )存在連接不相鄰的鞍點、結點的行波( a2 ) ;然後在地f有界的條件下得到( )存在連接鞍點(包括相鄰和不相鄰)的粘性沖擊波c ,彌補了[ 11 ]缺少嚴格證明的不足,並推廣了[ 11 ]在f為凸的條件下得到的粘性沖擊波的存在性結果。Based on the perturbation riccati transfer matrix method, the calculating program are developed. the program can be used to the perturbation analysis and the sensitivity analysis of the real and complex, the single and repeated eigenvalues and eigenvectors for lateral vibration of rod and beam structures, especially suitable to the perturbation analysis and the sensitivity analysis of eigenvalues and eigenvectors for rotordynamic systems ; 2. the perturbation riccati transfer matrix method was applied to identify the parameters of the rotor for a boiler supply pump, and the accurate dynamic model of the rotor was archived
該程序可以對桿、梁結構橫向彎曲振動的實數、復數的孤立和重頻特徵值問題進行攝動分析和靈敏度分析,特別是適合於轉子動力學系統特徵值和特徵向量問題的攝動分析和靈敏度分析; 2 、用攝動riccati傳遞矩陣方法解決了某電站鍋爐給水泵轉子的參數識別及動力模型修改的問題,並給出了該種型號的給水泵轉子的更準確的力學模型,為進一步的轉子動力學分析與設計奠定了可靠基礎; 3 、給出了攝動理論在相關領域如隨機特徵值分析、隨機振動響應分析、可靠性分析、靈敏度分析、優化設計以及參數識別中的應用公式。Sometimes, we can not choose a proper lyapunov function that satifies theory ' s conditions, but we can consider its perturbed systems and can use sevsral lyapunov functions to study the systems
有時,我們不能選取到一個恰當的lyapunov函數滿足定理的條件來直接判斷系統的穩定性,但是,我們可以考慮其攝動系統以及採用多個lyapunov函數來解決問題The author built the dynamics model of its constrained motion with frictional contact, and its moving stability is analyzed by singular perturbation theory
提出了管道內受限微機器人運動的動力學模型,並根據這一模型利用奇異攝動理論對微管道機器人管內運動穩定性進行了研究。By comparing with stochastic structural analysis, relations between the two methods have been found. the response surface method is used to obtain the second order estimates of the calculated results bound. by means of viscoelastic stochastic finite element method, the instantaneous reliability, the first passage reliability and fuzzy reliability of srm grain are investigated
採用凸集合模型表示藥柱參數的不確定性,在粘彈性有限元攝動分析基礎上進行了結構的響應區間計算,討論了概率方法和集合理論模型得到的響應區間之間的關系,利用響應曲面法進行了區間的二次估計。The new method of design robust h _ asac controller with mixed uncertainty is presented. the main ideal of the new method is as follows : the reduced modals are taken as additional disturbance for system, the original problem is transformed into the problem of robust performance design for the parameter uncertain system. then the parameter uncertain problem is reduced to the standard h _ control problem to solve
2 .首次基於魯棒h _控制理論,提出了設計具有復合攝動的結構振動聲輻射系統魯棒h _控制器的新方法,即:通過將未建模動態作為系統的附加干擾,把復合攝動問題的魯棒性能設計問題轉化為參數不確定系統的魯棒性能設計問題,然後將參數不確定問題變化為標準h _控制問題求解。Under different conditions, for example, with variable additional resists or system parameters, the system applies the variable structure controller to adjust the speed system with train. the results of simulation show the variable structure control can achieve a fast response, high stability under parametric variations and disturbances, with no overshoot. additionally, it has stability for the adjustment speed of atcs and provides the comfortable speed, for the travelers, and improves the system performance
採用變結構理論分析在不同情況下,如附加阻力變化,系統參數變化等,模擬滑模變結構控制器控制的列車自動調速控制系統,模擬結果表明,滑模變結構控制的列車自動調速控制系統能實現速度響應快、無超調,系統對參數的攝動和外部干擾不敏感,實現列車自動控制系統的速度調節的穩定性,保證旅客的舒適,改善了系統性能。The perturbation resistance of vehicle impact accident reconstruction models is analyzed by thee common mathematical methods based on perturbation theory
摘要基於攝動理論,應用3種常用的數學方法對基於動量定理建立的汽車碰撞事故模型的抗擾性進行分析。To ensure all segments under construction to approach corresponding construction segmental reasonable states in both configuration and mechanics states and good behavior of structure after completion, escaping from all kinds of accidents in whole process of construction with high efficiency, safety, excellent quality of engineering achieved, the grey prediction model ngm ( 1, 1 ) was proposed to fit prediction of any raw grey series by studying grey causes and whitening results based on the normalized mapping rules ; random perturbation method of genetic algorithms was proposed to raise efficiency of forward rolling optimization ; simultaneous analysis of strength and stability was carried out to ensure safety of strength and stability
摘要為了保證實際施工中結構各節段在構形和受力狀態兩方面逼近施工節段合理狀態,避免事故發生,確保工程高效、安全、優質,基於歸一化映射規則,研究灰因和白果,提出了適應任意灰序列的灰預測模型ngm ( 1 , 1 ) ;研究遺傳演算法的隨機攝動法,提高向前滾動優化效率;研究強度、穩定性的同步分析技術,保證施工過程強度、穩定性安全。Abstract : based on the fundamental theory of computation of the cable - prestressed steel trusses established in paper 1, the iterative perturbation formulas which inversively determine the stiffenesses of elements of steel trusses and cables with the restraint of vertical displacements of the truss are put forward on matrix perturbation principle
文摘:基於文1所建立的拉索式予應力鋼桁架基本計算理論,根據矩陣攝動原理進一步給出了以豎向結點位移為約束反演確定任意布索張拉予應力鋼桁架單元剛度和拉索剛度的攝動迭代公式。On the other hand, quite a number of practical systems with numerous dimensions may have some fast variables taking on singular impulse characteristic, such as electric power system, control system of rolling mill assembly, biochemical process, nuclear reactor, control system of airplane and rocket, and chemical diffused reaction, etc. so, it is important to study the problem of robust control of singular system i n the domain of control theory
一般這些不確定性並非不可度量的,通常能給出這些不確定性大小的某種約束,魯棒控制理論正是處理系統模型具有不確定性的有效方法。另一方面,在大多數維數很大的實際系統中,都有呈現奇異攝動特性的快變變量,如電力系統,冷軋機的工業控制系統,生物化學過程,核反應堆,飛機和火箭系統,以及化學擴散反應等。This paper get a result about practical stability of its perturbed systems and a result about its practical stability using several lyapunov functions
本文又得到了脈沖混合微分系統的攝動系統的關于兩個測度的實際穩定性定理,給出了一個例子,並利用多個tapanunov函數得到了關于該系統的實際穩定性結果Pseudo excitation method ( pem ) is used, thus one random process excitation can be transformed into a deterministic transient excitation, so the joint - random problem is turned into a single - random problem accurately, it can be solved easily by means of perturbation method and sequence orthogonal decomposition theory respectively. the probabilistic approach is used to transform stochastic optimization into deterministic optimization, therefore the optimization can be achieved through multiple objective decision making theory
以虛擬激勵法為基礎,將隨機過程激勵轉化為確定性動力激勵,從而將復合隨機問題精確地轉化為僅結構參數具有隨機性的問題,分別利用攝動理論和次序正交分解理論推導了確定性動力激勵下隨機結構響應特徵,採用概率方法將隨機優化問題轉化為確定性優化問題,從而可以通過多目標決策理論進行結構優化設計。The influence of optical source chirp on femtosecond soliton interaction is studied numerically, and the unequal amplitude method can reduce the interaction. in addition high - order coupled equations governing the evolution of two orthogonal polarization components of the same wave are derived by using multi - dimension derivation expansion method of singular perturbation theory and the dispersion relation. furthermore, a class of optical solitary wave solutions, such as the bright - bright, dark - dark, bright - dark, and combined solitary waves are found under certain parametric conditions
數值研究了源啁啾飛秒孤子間相互作用,提出了抑制該作用的可能方案;用奇異攝動多重尺度導數展開法和色散關系推導了耦合高階非線性薛定諤方程( chnlse ) ,並用行波變換法得到了一系列孤波解析解,分析了它們在光纖中傳輸的必要條件,也討論了它們的穩定性,為實現飛秒光脈沖在光纖中的無畸變傳輸作理論上的探索。Oscillation theorems for second order perturbed nonlinear differential equations
二階非線性攝動微分方程的振動性定理3. under the conditions of sound velocity perturbation and the unmodel dynamic, active structure acoustic control system with robust h _ controller is simulated in this thesis. the performance of the robust h _ controller is compared with standard controller, the results show that the robust h _ controller possess famous robust performance
3 .對基於魯棒h _控制理論的結構振動聲輻射主動控制系統,在考慮流體聲速攝動和未建模動態的影響下進行了模擬研究,同標稱控制器的性能對比表明,魯棒h _控制器具有令人滿意的的穩定魯棒和性能魯棒性。分享友人