varying parameter 中文意思是什麼
varying parameter
解釋
可變參數-
For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying - thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field, by establishing the equations of motion, the equations of distortion, the equations of lorentz force, the equations of electronic dynamic mechenical, and adopting iterative method, we gained the nonlinear magneto - elastic calculation method and outcome of current - carrying shell, and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field
摘要為了獲得內邊界固定的環形導電薄板在均布力與橫向磁場作用下的變形問題的數值解，通過建立運動方程、變形方程、電動力學方程和洛侖茲力方程，運用迭代法得出了載流板殼的非線性磁彈性的計算方法和結果，以及機械場、電磁場對鐵質變厚度圓板各力學參量的影響程度。 -
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。 -
Thirdly, a novel parameter - varying adaptive algorithm for rtt and rto estimations based on the information theory and the maximum entropy principle ( mep ) is presented. it is used in the implementation of trinomial protocol to detect packet losses and to adjust the sending rate
再次，給出了一種新的基於信息理論和最大熵原理（ mep ）的變參數自適應rtt和rto估計演算法，在三項式協議實現過程中用於探測丟包及速率調整。 -
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。 -
Compared with other documents, these formulae more comprehensively consider all situations of varying areas from small glasses to large ones. with the change of parameter a / c, the coefficients are changing
本公式與其他文獻相比，最大的特點是更全面地考慮了玻璃面板面積由小變大的所有情況（隨著a c的變化，系數是變化的） 。 -
And varying interval and grey power function of grey parameter in this model is also defined with experimental results of the author and many related references
根據筆者自己的實測實驗結果和他人實驗的結果，分析了室內空氣品質灰色非本徵方程中各個灰參數取值范圍（上下界）和灰色權函數。 -
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 -
Abstract : 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
文摘: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。 -
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。 -
According to the analysis of simulation curves and the contrast between pid controller with disturbance feedforward compensation and fuzzy controller, it can be concluded that the new method of control not only has better robustness to the disturbance and varying parameter, but also has quick response and simple realization applying to the system with strict demand on the range of export parameter under variational condition
通過對模擬曲線的分析並與干擾前饋pid控制及模糊控制相比較，可以看出這種新的演算法對干擾及參數攝動的魯棒性強、響應快速且實現簡單，尤其適用於工程上在變工況情況下對輸出參數變化范圍要求較高的系統。 -
A robust algorithm for time varying parameter estimation
梯度演算法在轉子時變控制中的應用 -
Third, to make the vehicle meet the performance index in full flight envelop, a h gain - scheduled controller based on linear varying parameter ( lpv ) system are designed. a lpv plant with a linear fractional dependent variable can be represented by upper lft ( linear fractional transformation ) interconnection. with this technique, the overall control problem can be transformed to a traditional robust control problem, and the ultimate results are given by solving a series of linear matrix inequalities ( lmis )
通過把非線性系統簡化為了線性變參數系統（ lpv ） ，再有通過線性分式變換（ lft ）將lpv系統轉化為一個線性定常系統和不確定性組成的lft互聯形式，使之轉換成為一個經典魯棒控制問題，然後通過求解一組線性矩陣不等式（ lmis ）得到變增益h _控制器。 -
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。
分享友人