time-varying parameter 中文意思是什麼
time-varying parameter
解釋
時變參數-
Suction gas pressure goes up as the compressor run at the lower speed in the lower burthen, and this is beneficial to lower systems energy - consume. when the system is controlled by wvf, the discharge change of the evaporator is not linear ; the electronic expansion valve is adopted to regulate the system superheat degree, and the controlled object is parameter time varying, accordingly, the time varying controller should be adopted
在負荷較小時，壓縮機採用低速運轉，吸氣壓力升高，這對系統降低能耗是有利的；變頻控制時，蒸發器製冷劑流量的變化並非線性；系統中採用電子膨脹閥進行過熱度控制，被控對象具有參數時變的特性，相應地宜採用變結構的控制器。 -
The time - varying parameter ( tvp ) model is put forward to estimate the dynamic coefficient of fiscal expenditure to economic growth, and further to evaluate the effectiveness of fiscal policy
摘要利用狀態空間方法，對1978年以來我國財政支出總量和有關項目的經濟產出進行了動態測算。 -
The conventional variable structure control technique for uncertain system requires that the uncertainty bound is known as a premise to assure robustness. the requirement creates an over - conservative controller and enlarges chattering. the proposed controller regards the influence of unknown disturbances and parameter uncertainties as an equivalent disturbance and generates an on - line estimation used in smc to cancel the slowly varying uncertainties by the mechanism of time delay. the reaching law approach is used to get the conditions and band of quasi - sliding mode. the new methodology offers a robust feedback control with much lower gains and reduces chattering without a prior knowledge of the uncertainty bounds or matched conditions
常規變結構控制用於不確定系統，須利用不確定性界確保系統的魯棒性，控制器過于保守且抖振變大.本文把未知干擾和參數不確定性的影響等效為名義系統的外界干擾，利用時延技術對干擾進行在線估計，並將估計值引入到變結構控制中，從而抵消掉系統中的慢變不確定性，利用離散趨近律法，推出了準滑動模態的存在條件及其帶寬.該方法克服了以往控制方法中須已知不確定性界的限制，且不必滿足匹配條件，用較低的控制增益保證了系統的魯棒性，降低了準滑動模態帶即削弱了抖振 -
Stochastic and uncertain performance of power systems is thoroughly studied with a probabilistic simulation method in this paper. based on modeling of element failure and dispatching measures, static, dynamic and integrated securities are analyzed, and hence operation states are quantitatively classified. in probabilistic static security assessment, sequential and non - sequential monte - carlo sampling techniques are applied considering time varying parameter and constraints
本文採用概率模擬方法，深入研究了電力系統運行中的隨機和不確定特性，在對元件隨機故障和調度控制措施建模的基礎上，對系統的靜態安全、動態安全和綜合安全進行概率評估，建立了電力系統運行狀態的量化分析模型。 -
Firstly, sufficient conditions of lagrange stability for nominal unperturbed pendulum - like systems are derived based on the nonlocal reduction method. then the static state feedback controller design methods are presented for uncetain pendulum - like systems with time - varying norm - bounded parameter uncertainty to obtain robust lagrange stability. it is shown that the above problem can be reduced to the existence of the solutions to a set of lmis
在具體的推導過程中，首先基於非局部降階法，推導了高階標稱類擺系統lagrange穩定的充分性條件，然後基於此條件，針對具有范數有界參數不確定性的受控高階類擺系統，給出了使其魯棒lagrange穩定的狀態反饋控制器設計的充分性條件。 -
Empirical analysis of fiscal expenditure effectiveness with time - varying parameter model
財政支出政策效應的時變參數分析 -
This paper lays emphasis on the research of internal connection of various time varying parameter identification methods
摘要本文重點研究了現有各種時變參數識別方法的內在聯系及各自特點。 -
Parameters of the dynamic statistical model at the time - varying parameters, variation of parameter reflects the variable trend of seepage
動態模型的統計參數是隨時間變化的時變參數，參數的變化反映了大壩的滲流變化趨勢。 -
( 2 ) for linear systems with time - varying delays both in state and control, and subject to norm - bounded parameter uncertainties, the problems of robust stabilization and robust h control are studied and delay independent results are derived by constructing proper lyapunov function to deal with the time - delay, also by using riccati equations method and inequalities transformations to deal with the uncertainties. according to the transform function of the system, frequency domain method and time domain method are combined together to analyze the robust h control problem of the uncertain time - delay system
（ 2 ）研究了一類狀態和控制同時具有時變時滯以及參數時變有界不確定性系統的時滯無關的魯棒鎮定及h控制問題，採用把時滯因素和不確定因素分開處理的思路，通過構造適當形式的lyapunov函數來處理時滯，採用不等式變換及riccati方程方法來處理不確定性，採用頻域與時域相結合的方法根據系統的傳遞函數分析時滯不確定系統的魯棒h控制問題。 -
Engine operating conditions cold be changed quickly and are very bad sometimes, such as : from suddenly cranking to driving in winter, acceleration to sudden torque demand. in the light of zero emission vehicles, in order to achieve better hot efficiency, maximum power, higher safety and best emission, engine controls become more and more difficult. automotive engines are typical nonlinear, time - delay, time - varying parameter systems
汽車發動機使用環境變化大，使用條件有時非常惡劣，從寒冷的冬天突然啟動進入行駛狀態，行駛過程中的突然加速，急劇的扭矩變化等等，在這樣的條件下，為了使其熱效率、輸出功率、行駛性、安全性和排氣清潔性處于最佳狀態，給汽車發動機的控制帶來了極大的困難，特別是零排放汽車排放標準的提出，對發動機控制提出了更高的要求。 -
Three improvements were proposed. that is : coding the chromosome with floating point numbers, selecting different optimal strategy according to the electric dimension of the target, utilizing subsection varying parameter genetic algorithm to avoid trapping in premature convergence. the optimization time was saved significantly after adopting these methods
針對球面和半球面結構的雷達吸波材料優化設計時間長，提出三點改進方法：染色體採用浮點數編碼；依據優化目標的電尺寸採用不同的優化策略；優化過程中採用分段變參數的優化方法。 -
Then, robust fault detection and isolation problems for time - delay linear parameter - varying systems are investigated in this thesis. the residual generators are created by parameter - dependent filters, i. e. the designed filters are time - varying whose matrices parameters are known functions of time - varying parameters
其次，本論文研究了時滯lpv系統的魯棒故障檢測與分離問題，利用參數依賴濾波器構造殘差產生系統，即所設計的故障檢測濾波器也是時變系統，其參數矩陣是時變參數的確定函數。 -
Modal parameter identification of time varying vibration systems using the time varying multivariate prony method
法的時變振動系統模態參數辨識 -
Parameter estimation of time - varying structures by the adaptive kalman filter
基於自適應卡爾曼濾波的時變結構參數估計 -
Parameter identification of time - varying systems based on the least - squares modified algorithm
基於最小二乘改進演算法的時變系統參數辨識 -
A robust algorithm for time varying parameter estimation
梯度演算法在轉子時變控制中的應用 -
A recursive parameter estimation algorithm then adjusts the controller online to guarantee the precise current tracking, independent of time - varying motor parameters
針對電流控制器對電機參數變化敏感的問題，對電機參數進行在線辨識，保證控制器參數與電機的實際參數一致。 -
A chaotic synchronized secure communication scheme based on the active - passive pattern, with time - varying behavior via a parameter perturbation technique is proposed in the end of this thesis. the computer simulation and performance analysis results show that the compensation is well done to solve the conflict between the synchronized error and the parameter sensitivity. its capacity against attacks is also discussed
最後以主動?被動同步方法為基礎，提出了一種變參數混沌同步保密通信方案，對該方案的抗攻擊性、同步特性等各方面特性作了詳細的分析，分析結果表明該方案具有一定的抗攻擊性與實用性。 -
Abstract : this paper discusses an adaptive control scheme on time varying parameter with pure delay and inertia. first, control system predicts parameter of the plant based on the parameters recognized, and then calculates control output according to minimum error control. by using this method, the system can maintain good performance when the parameters of the plant are varying. the steam generator system model is simulated, and a satisfied control effect is achieved
文摘:對具有滯后和慣性時變對象，提出了一種自適應預測控制方案，對對象參數進行預測，利用最小方差控制方法進行控制，確保系統在對象參數變化時仍保持優良的控制性能.根據本文提出的方法，對蒸汽爐系統蒸汽溫度控制進行了模擬，取得了較滿意的控制效果 -
First, robust eigenstructure assignment, eigenstructure assignment is an effective method for output decoupling of mimo system. here, we first design an objective function in term of desired location of close - loop eigensvalues, achievable structure of close - loop eigenvectors and the unstructured time - varying parameter perturbations in system matrix
特徵結構配置對于mimo系統的解耦控制是一種很有效的方法，本文提出的演算法是：設計一個性能指標函數，綜合考慮特徵向量的接近程度，未被配置的特徵值的穩定性及系統的非結構型擾動。
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