非時變的 的英文怎麼說
中文拼音 [fēishíbiànde]
非時變的
英文
time invariant-
It is a orient - subject, integrating conformance gather and come into being by processing data in cleanout, change, loading. it supports integrate, uniform, accurate data for data mining. the data warehouse saves account message from customers and relation data of competitions
數據倉庫是一個面向主題的，集成的，時變的，非易失的數據集合，它是將各種數據通過清洗、轉換、裝載過程而形成的，它為數據挖掘提供完整、統一、準確的數據。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 major job is manufactured a transmitter, which has three upmixer channels. its function is to up convert the signals from c - band to ka - band. the input local oscillator is provided by a low frequency crystal oscillator which has a good performance of phase noise, through 512 times multiply to ka band. this sysetem is used in the laboratory as transmitter source of the fuze, for the multidimensional objects in practise, which lead to the complexity of the reflect signal, so the amplitude, frequency and the phase of the transmit signals both have a key role in dealing with the reflection signals. therefore, this system requires for both the coherence of the single channel ’ s amplitude, phase and multi channels
本文的主要工作是應用戶要求製作一具有三發射通道的上變頻系統，可以將c波段的微波信號上變頻到ka波段的毫米波信號。系統的本振輸入基頻由一相位噪聲非常好的低頻率晶振提供，經過512次的倍頻放大至ka波段。本系統作為實驗室中引信的發射源，由於目標反射信號具有時變的多維性，反射信號變得極為復雜，在信號處理時，不僅信號幅值、頻率有決定意義而且相位關系也很有決定意義。The second part studies optimal pure proportional navigation ( ppn ), with time - dependent gain of navigation to maneuvering target based on proportional navigation theory. optimal gain of navigation is constant for ppn without maneuvering ; based on this, solution of time - dependent gain of navigation is given by iteration approach, and the time required for capture is given, the times of iteration is decided by comparing this time with the iteration step
對目標機動的追逃問題，考慮導航增益可為任意實數，且隨時間和初始條件改變，這一思想是建立在目標非機動的純比例導引制導規律，最佳導航增益為常數的基礎之上，利用迭代的方法，給出了時變的導航增益的求解方法，並給出了實現捕獲所需的時間，用此時間與迭代步長進行比較，判定迭代次數。Systems are lumped, time-invariant, or linear if all their elements have these properties.
如果一個系統的所有元素都有集總的，非時變的或線性的性質，則該系統是集總的，非時變的，或線性的。First, we examine whether the momentum strategies and contrarian strategies can create significant profits under different formulation horizons and holding horizons, whether past factors ( market return, characteristic of individual stock ) can provide an important implication about the profits of momentum and contrarian strategies. second, we discuss the reasons for the significant profits of momentum or contrarian strategies, including seasonality, cross - sectional risk factors, time - varying risk premium, industry momentum, and stock underreaction, overreaction, and random walk. third, we discuss the link of time series predictability of stock returns and momentum profits, including stock underreation, overreaction, delayed reaction, and time - varying risk premium
研究目的有四：其一，探討中國股市執行慣性策略或反向策略的顯著獲利模式及與各狀態因子（市場及個股狀態）的關系；其二，全面分析中國股市慣性與反向效應之潛在成因，包括截面風險因素、季節因素、時變的風險溢價、行業慣性效應以及行為金融模型與conradandkaul （ 1998 ）的隨機遊走觀點之爭論；其三，構建非效率市場之股票價格運動方程，並基於此，規范地演進慣性效應之時序生成途徑，包括反應不足、過度反應、滯后反應以及風險溢價的時變性；其四，探討中國股市中投資者的特殊信息反應模式，並以此來解讀中國股市的中短期過度反應與反應不足的現象，以及個股間的超前一滯后關系的表現模式及形成機理。There are many plants that have the character of time - varying, large delay, large inertia in the process of production of modern power station such as the superheated steam temperature, the reheated steam temperature, the water treatment of boiler and the load regulation. some of them have the strong character of nonlinear and some of them are multivariable coupling systems it is very difficult to obtain good effect of control by conventional pid control. it is necessary to set up the mathematics models of controlled plants if applying control means of modern control theory such as self - adaptive control, optimal control ， decoupling control and predictive control. and these control systems have large calculation and bad character of real time in general. these disadvantages make them be not able to meet the need of real production process and limit the application of them in modern power station. now the generator units are developing towards large capacity and high parameters. many new kinds of generating electricity means are coming into being. the characers of production units of power station become more and more complex but the demand to quality of control becomes more and more strict. the new control means are in bad need to control them effectively
現代電站的生產過程中存在過熱汽溫、再熱汽溫、鍋爐水處理、負荷調節等許多大遲延、大滯后、特性時變的對象，它們中有些還是具有強非線性特性的對象或多變量耦合系統，採用常規的pid控制手段很難取得良好的控制效果。若應用現代控制理論中的自適應控制、最優控制、解耦控制、預測控制等控制手段，則需要建立被控對象的數學模型，而且往往控制系統的計算量大、實時性差。這些缺點使其很難滿足實際生產過程的需要從而極大地限制了其在現代電站中的應用。The paper consists of several parts as following : firstly, we probe an estimating method with the time - change parameters to overcome the problem with greater errors that us think a dynamical process with the time - change parameters as a static process with the no time - change parameters and forecast the time - change parameters system by the model with the no time - change parameters
本文主要進行了以下幾方面的工作： 1探討了一種動態系統的時變參數的估計方法，克服了以往把一個時變參數的動態過程當作了非時變參數的靜態過程，而用非時變參數模型預報時變參數系統的狀態時帶來的較大誤差問題。A data warehouse is a subject oriented, integrated, non - volatile, and time variant collection of data in support of management ' s decisions
數據倉庫是（ datawarehouse ）一個面向主題的、集成的、時變的和非易失的數據集合，支持管理部門的決策過程。Fourier transform cannot offer entire information of signals, namely frequency information presenting to any period of time cannot be confirmed on earth. although, short time fourier transform can obtain local information, it is difficult to find a " good " time window to fit for every period of time
傅立葉變換不能提供信號完全的信息，即不知道頻率信息究竟出現在那些時間段上；短時傅立葉變換雖然可以獲得局部信息，但是對於一個時變的非穩定信號我們很難找到一個「好的」時間窗口來適應各個時間段。Electro - hydraulic regulating system of turbine is a non - linear time - varied minimum phase system
水輪機調節系統是一個非線性、參數時變的非最小相位系統。Usually the system is time - variant nonlinear system, and can automatically match with ( i. e. " adaptation " ) variational environment
通常這類系統是時變的非線性系統，可以自動適應（即「自適應」 ）信號傳輸變化的環境和要求。Inverse synthetic aperture radar ( isar ) imaging of non - cooperative maneuvering multi - target is a challenging task due to its time varying orientation and the relative motion among targets
摘要非合作的機動多目標相對于雷達射線的姿態是時變的，而且目標間可能存在相對運動，給逆合成孔徑雷達（ isar ）成像造成較大困難。Although the research of industrial robotic manipulators and their control algorithms has had a long history, it ' s difficult to apply many algorithms to real plants because of the high non - linearity, high coupling, time variation of the system, problem in model accuracy, computation consumption and equipment costs
工業機械手及其控制演算法研究已經有了幾十年的歷史。但是由於工業機械手是一個高度非線性、強耦合、時變的系統，模型精度問題、龐大的計算量和設備成本成為了很多理論演算法投入生產實踐應用的「瓶頸」 。At present, variable air volume ( vav ) air - conditioning system is the main steam of the whole air conditioning system in china and abroad because of its large energy conservatioa however, since vav system is multivariable, strongly coupled, nonlinear and time variant, its design, performance and management are more difficult than constant air volume ( cav ) system, and stable control of the entire vav system is focused in particular in china study on the stability, the key condition of the vav operation, the paper divide the vav system into ahu part and terminal part based on the coordination control strategy
目前，變風量（ variableairvolume ， vav ）空調系統以其巨大的節能潛力逐漸成為國內外空調系統的主流。但是，變風量（ vav ）空調系統具有多變量、強耦合、非線性、時變的特點，因此它的設計、運行和管理都比定風量（ constantairvolume ， cav ）系統難度大。這也是限制vav系統更廣泛應用的一個重要原因。However, since vav system is multivariable, strongty counted, nonlinear and time variant, its design, performance and management are more difficult than cav system ' s
但是，變風量空調系統具有多變量、強耦合、非線性、時變的特點，因此它的設計、運行和管理都比定風量（ constantairvolume ， cav ）系統難度大。5. according to the non - linear and time variant feature of the object under control in dynamic positioning system, a controller for dynamic positioning system is designed, and a strong robust self - learning fuzzy - sliding mode controller is produced, which enhanced the performance of the control system
5 ）根據動力定位系統被控對象非線性和時變的特點，設計了動力定位系統控制器，提出了一種強魯棒性的自學習模糊變結構控制器，提高了控制系統的性能。First, because pipelines are so complex that controlled object is high order, delay, coupling, nolinear and time - varing, it is difficult to realize closed loop control for it using valid mathematic model. to resolve this problem, the paper presents a fuzzy - pid control algorithm with self - adjusting regulation factor. second, if a moving motor supplied by inverter power is switched to be supplied by power supply, the impact of overload - voltage and overload - current appears
主要針對中、大容量供水系統中，由於供水管網鋪設復雜、彎管多、控制對象具有高階、滯后、耦合、非線性及參數時變的特點，難以利用有效的解析式數學模型進行閉環控制，以及多臺水泵並聯運行時，水泵電機由變頻電源供電向工頻電源供電切換過程中產生的過電壓過電流沖擊這兩個難題，提出了可調整因子fuzzy - pid控制演算法及利用鎖相環控制實現水泵電機由變頻電源向工頻電源的同頻同相平滑切換。Analyzing much experiment result, the paper presents a logical controlling method based on pan - bool algebra and constructs the controlling model in allusion to the non - linear, time - varying, delaying do control system
在分析了大量實驗數據的基礎上，針對微生物深層發酵過程中非線性、大滯后、時變的溶解氧系統，建立了基於泛布爾代數的邏輯控制模型。The data warehouse is a subject - oriented, integrated, time - variant, non - volatile collection of data used to support the strategic decision - making process for the enterprise
數據倉庫是基於主題的、集成的、時變的、非易失的數據的集合，為企業的戰略決策制定過程提供支持。分享友人