時變參數模型 的英文怎麼說
中文拼音 [shíbiànshēnshǔmóxíng]
時變參數模型
英文
time-varying parameter model-
Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet - parameter on evaporator. fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio - parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping
本文的主要內容如下： 1 ）對翅片管蒸發器結構特點進行分析，選取適當的微元控制體，就干、濕和霜工況下對每個微元分別進行傳熱傳質分析，基於經驗關系式確定霜的有關參數，對于霜工況下的霜生長建立模型，經適當假設，運用質量守恆、能量守恆和動量守恆方程建立適合動態模擬的蒸發器數學模型，為系統模擬奠定基礎； 2 ）對蒸發在大擾動下的開、停機過程，運用動態集中參數模型進行分析和計算，為更好地描述製冷系統運行的全過程奠定基礎，同時也為製冷系統實現自動控制提供一定的理論基礎； 3 ）對蒸發器正常運行過程，運用動態分佈參數和參數間定量耦合的觀點來分析和計算，為更好地了解穩態工況下各點參數的變化情況及各入口參數對蒸發器動態特性的影響即蒸發器性能對各參數變化的敏感性； 4 ）編寫翅片管蒸發器動態特性模擬計算程序，可以計算不同邊界條件和初始條件下的製冷劑熱力參數、空氣溫濕度和霜厚度分佈場，實現對翅片管蒸發器在干、濕和霜工況下的動態模擬。Then the characteristic and estimation approaches of two important time variant parameter ( tvp ) and state dependent parameter ( sdp ) models are presented and the efficiency of the dbm method is illustrated by three examples based on the analysis of duffing equations, lorenz equations and time - variant equation, in contrast with other methods
本文首先總結了dbm在常規黑箱辨識演算法中的基本框架和兩類重要模型?時變參數（ timevariantparameter ， tvp ）模型和狀態依存參數（ statedependentparameter ， sdp ）模型的特點及其估計演算法。The mathematics model of newsboy problem with time - based parameter is given, and through analyzing model and numerical instance, it shows, with contrast of traditional newsboy problem that time factor is not taken into account, the former can increase the income of the dealer
建立了正態分佈下時變參數的報童問題的數學模型，通過模型的求解和數值分析，結果顯示，與傳統的不考慮時間因素的報童模型相比，前者能夠增加零售商的收益。Based on the fem program on fracture of plane structure developed by professor fu xiaoling of ho hai university, a two demension damage and fracture finite program package which is programed in fortran 90 language is developed. the paper adopts the plane - eight - nodes isoparameters element and compute the developing law of the damage and macro - damage of plane structure under load. considering the original damage and tension and compression damage at the same time, the paper adopts the more reasonable concrete constitute relation of two demension and exponent function model
在河海大學符曉陵副教授所編制的平面結構斷裂有限元程序（ dl08p4 ）基礎之上，本文用fortran90語言編制的二維損傷-斷裂有限元程序包，程序採用平面八結點等參數單元分析計算平面結構在外荷載作用下損傷及宏觀裂縫的發展規律，考慮了混凝土結構體內存在著初始損傷和同時存在的拉、壓損傷，並且採用更為合理的具有損傷含義的混凝土二維本構關系（即正交異性損傷模型中的本構方程）和指數函數模型建立的並可進行拉、壓損傷可比性換算的損傷演變方程，較為真實地反映了實際情況。The predigested calculating model about lunar soft - landing damping system is established in the course of landing shock. the dynamic computer simulation model is established according to the structure parameters
建立了磁流變阻尼器緩沖系統沖擊時的簡化模型，利用本文建立的動力學方程和所用阻尼器結構參數構建了動態模擬模型，並進行了計算機模擬。The sensitivity algorithm is a knowledge of research on the affection of parameters varies to system performance. combination with pressing force and infuse time predicted model, by using sensitivity algorithm, the affection of cast temperature, mould temperature and infuse pressure on infuse time is researched deeply, and the affection of cast temperature, infuse time and infuse pressure on the pressing force in the origination stage of extrusion process. the sensitivity analysis has huge instructing significance to the selection of parameters
靈敏度演算法是分析參數變化對系統性能影響的一種有效工具，所以本文引入靈敏度演算法，結合壓制力和浸滲時間預測模型，深入研究了澆注溫度、模具溫度和浸滲壓力對浸滲時間的影響關系，以及澆注溫度、模具溫度、浸滲時間和浸滲壓力對擠壓過程起始階段壓制力的影響，對于參數的選取，具有一定的指導意義。Time, the paper studies rheology of rockfillwith yin zongze model, of two yield surface and rheological relation of negative exponential, and some formulas are obtained it is difficult to determine the rheological parameters, of rock fills through laboratory test for the limited specimen, dimension, short duration and particle, constituents
本文採用殷宗澤雙屈服面模型與堆石流變的負指數變化關系式，研究堆石的應力與流變關系，並推導了相應公式。在流變參數確定方面，由於室內試驗的試樣尺寸、時間比尺和顆粒破碎很難模擬現場條件，根據室內試驗直接確定堆石的流變參數是困難的。The best dosage of dispersant and disperse medium, and the best time of ultrasonic disperse. secondly, the bp neural network process parameters model which describes the relationship between the important process parameters of the preparation of superfine quartz powder and the important evaluate guidelines was built, based on experimentation data. the forecast of the important guidelines was achieved with this model
其次，本文以試驗數據為基礎，基於bp神經網路建立了球磨法制備超細石英粉體的關鍵工藝參數（轉速，時間，裝樣率，料球比）與粉體的關鍵評價指標（中值粒徑，粗端粒徑，均勻性系數）之間多目標多變量的bp網路工藝參數模型，該模型的建立實現了粉石英制備的關鍵指標預測。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。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。Presents the new independentmodal - space variable structure control for flexible structures with distributed parameter model, which is decoupled into a number of 2 - dimensional subsystems in terms of coordination transmission where, the variable structure control law is designed within the given boundary of structural uncertainty and disturbance, and concludes from simulation results that the algorithm is not only simple so as to accomplish in real time, but also is very robust
對具有分佈參數模型的撓性結構提出了模態空間變結構控制方案，利用坐標變換把整個系統分為若干個獨立的二維模態子空間.在每個獨立的模態子空間內，在給定參數不確定性范圍和干擾力矩范圍的情況下，設計變結構控制控制器.通過模擬驗證了控制演算法的有效性;控制演算法簡單，易於實時完成，又具有較好的魯棒性Identification of time - varying modal parameters of structure using output error time series model
利用輸出誤差時間序列模型識別結構時變模態參數According to the theory of engineering thermodynamics and phase change, heat - transfer process of the special working fluid heat - pipe stove is analyzed. some hypotheses are postulated and with the help of equation of mass - conservation, energy - conservation, the dynamic concentrative parameter model is built, the change of each parameter is prescribed at any stage from starting to stopping. with the thermodynamic calculation of burnable process, the parameter of device, such as heat - transfer coefficient / thermal efficiency etc, are achieved under steady state ; based on theoretic calculation, observing the actual running circumstance of the heating stove in person, with some performance comparison between the new and the old, the high efficiency and reliability of heat - pipe stove is proved, the project which expend it in the oil - filed is feasible
對充入該工質的熱管加熱爐，本文根據工程熱力學和相變傳熱學及相關知識，對其進行了傳熱分析，經過適當假設，運用質量守恆和能量守恆定律，建立了裝置動態集中參數模型，描述了加熱爐從開機到穩定運行這一動態過程各參數的變化情況，同時對燃燒過程也進行了熱力計算，最終得到了穩態工況下裝置的換熱系數、熱效率等熱力參數；在理論計算的基礎上，親赴現場觀察該爐的實際運行情況，通過與原有的加熱爐的各項性能進行對比，最終證明新爐的高效性和可靠性，為其在油田中推廣的可行性提供了依據。The thermal state of the piston has been studied under the thermal shock in the first time. the lumped parameter system of the temperature has been established under the triangle rectangle and instantaneous impact. and the simulation results also have been got
首次建立了活塞在受到矩形波、三角形波、瞬態沖擊等熱激勵時的溫度變化的集總參數模型，進而獲得了在上述熱沖擊下活塞溫度的解析解及穩態解。However, in fact, thephysical parameters and dynamical character of the structure duringthe occurrence ofdamage are time - varying, and the response signalbehaves a non - stationary character. thus, it is generally recognized that the linear time - varying ( ltv ) model is moreappropriate and better than linear time - invariant ( lti ) model to capture theinstantaneous dynamical behaviors
然而事實上，結構的損傷使得其物理參數和動態特性隨著時間而變化，結構的響應具有非穩態的特徵。因此，利用線性時變系統模型，獲取系統的時變特徵，才更有利於結構破損診斷，線性時變系統的參數識別也受到了越來越多的關注。This paper is based on rs and gis, analyses the characteristics of luc of three periods in daqing city, discusses the traits of lucc of different periods, and discusses the driving forces from two aspects - nature factor and social factor, and forecasts the future land use pattern, points out the focus of land use continuable development. this research includes three significant problems, they are : the gaining of the lucc data in daqing area, the translation of land use pattern and its driving forces research, forecasts of the future land use pattern research. in the process of the study, we obtain the data that we need through manpower estimation and interpretation based on gis, then put the results into software envi, reclassify land use types using masking technology and decision tree
本次論文以黑龍江省大慶市為研究對象，基於遙感和gis平臺，提取了1979年、 1990年、 2001年區域土地利用/土地覆蓋數據，分析了研究區三個時期的土地利用/土地覆蓋特徵，利用單一土地利用動態度、綜合土地利用動態度、土地利用相對變化率等參數模型從土地資源數量、土地利用程度及土地利用區域差異等方面，探討了不同時期區域土地利用/覆蓋演化的特點，並從自然因素和人文因素兩個角度探討了區域lucc驅動力，最後利用馬爾科夫鏈模型對區域土地利用格局的發展趨勢進行了預測研究，提出了區域土地利用可持續發展的重點，為轉型時期的大慶市土地利用決策提供參考。It is the result of applying the system - distinguished method out of controlling theory to prediction. spurning the stationary parameter prediction model, the multiplayer - transfer method regards the predicted variable as a random, dynamic, time - changing system. it decomposes the time - changing status variable prediction into two steps : first, predicting the time - changing parameters ; second, on the basis of the first step, predicting the system status variable
多層遞階方法摒棄了一般統計預測方法中所使用的固定參數預測模型，而將預測對象看成是隨機動態的時變系統，把時變系統的狀態預測分離成為對時變參數的預測和在此基礎上對系統狀態的預測兩部分，對時變參數的預測導致狀態預測誤差的減小。In this essay, firstly the author analyzes the predictability of time series from china ' s stock exchange using three kinds of methods : arma model, neural network model and non - parametric estimation and gives evaluation on their performances while at the same time puts forward some conclusions deserving attention from both stock exchange supervising department and stock traders. secondly, the author examines the assumptions closely on which the above - said methods base and gives a detailed discussion on them, especially using garch model to test quantitatively the stability of china ' s stock exchange, afterwards drawing the conclusion that it is hard to make accurate prediction of price or return rate of china ' s stocks for none of the assumptions fully holds ground. thirdly, taking account of the difference between chinese stock traders as a whole and that of developed countries, the author gives a thorough analysis on the complexity and volatility of its ( traders " ) reaction to information and points out that the intrinsic heterogeneous and volatile reaction to information is an important reason for the almost unpredictability of the price or return rate in china ' s stock exchange
本文首先採用arma模型、非參數模型以及神經網路模型對我國股市時間序列進行研究，對三種方法在分析我國股市時間序列的表現進行評價，並得出了一些對監管部門以及股票交易者有借鑒意義的結論；其次作者對三種模型分析我國股市時間序列的前提進行了討論，特別是利用garch模型對我國股市的系統穩定性進行了量化檢驗，得出了前提難以滿足導致準確預測我國股市價格或收益率困難的結論；第三，考慮到中國股市股票交易者群體與發達國家股市股票交易者群體之間的差異，作者借用行為金融學的理論成果對我國股票交易者對信息反應的復雜性和易變性進行了詳細分析，指出股票交易者對信息反應的異質性和易變性是造成難以準確預測我國股市的一個重要原因，考慮到我國股市以散戶為主導的特性將長期存在，因此將行為金融學的研究結論納入對我國股市時間序列的量化研究具有重要的意義；最後，作者從唯理預測與唯象預測之間差異的角度出發，指出了唯象預測的缺點並對我國股市時間序列的研究方向進行了展望。( 4 ) the dynamic data forecasting model of ground settlement is studied, a new prediction model of grey - time serial with time - varying parameters characters is proposed
（ 4 ）研究了隧洞施工中地表沉降動態預測模型，提出了時變參數灰色?時序動態預測模型，並建立了一種改進的時變灰色模型。It is approved that gray model is consistent with asaoka model in mathematics, which placed the theoretical base of gray theory ' s application to settlement prediction. considering on that the prediction model adopted static parameter have low precision, based on gm. this paper established a settlement prediction method with time - dependent parameter
從數學上證明了灰色預測模型和asaoka法預測模型的一致性，這一證明為灰色理論在沉降預測中的應用奠定了理論基礎；針對目前預測模型參數保持恆定，導致預測精度偏低的問題，首次提出了時變參數沉降預測模型，並在灰色模型的基礎上，建立了具體的時變參數沉降預測模型。分享友人