熱電耦合 的英文怎麼說
中文拼音 [rèdiànǒugě]
熱電耦合
英文
thermoelectric coupling-
In section one, by using fice scheme and time - gcm, a model of trace gases and oh airglow affected by gravity wave is set up, then the propagation of nonlinear gravity wave and the effect on trace gases and oh airglow are analyzed. the result shows gravity wave excited by tropospause forcing can propagate stably to the mesosphere through the stratosphere so that energy and momentum can be transferred from one region to another. in this process, gravity wave undergoes growth, overturning, convection and breaking
在第一部分的工作中,利用全隱歐拉格式和全球熱層-電離層-中間層-電動力學環流耦合模式( time - gcm ) ,對重力波的非線性傳播及其在傳播過程中對中高層大氣中氧族和氫族成分和與之密切相關的oh氣輝輻射的影響進行了數值模擬,結果表明,從對流層向上傳播的重力波經歷了產生、發展、飽和、對流產生直至破碎的非線性演化,大氣的非等溫結構加速了重力波在中層頂區的破碎,重力波的非線性傳播是小尺度對流和湍流產生的一個重要的源。Iv ) for the strong interfacial coupling, there exist three pyroelectric peaks in the temperature curve of pyroelectric coefficient, and with the decrease of the interfacial coupling, the number of the pyroelectric peaks will decrease gradually
我們還發現,較強的界面耦合導致熱電系數的溫度曲線上的三個熱電峰的出現;而界面耦合強度的減弱及鐵電超晶格尺寸的減少將導致某些熱電峰的消失。Aiming at such problems in combustion system of homemade middle and miniature boiler, as a complex system with the character of dead zone, time variation, serious non - linearity, large time delay, coupling and a lot of disturbance, this paper presents a new set of optimal control resources. by using well - matched control method on system, stable automatic running is realized. having the serious divulgence coals difference a lot from each other in character, instability of chemistry, value of lowest emission of heat, home - made boiler controller is not at all ideal. instead of traditional model that controls the ratio based on proportional control or with the correct signal of the amount of oxygen, this paper, combined with intellect control theory - - fuzzy control and self - optimizing concept, propounded a kind of fuzzy self - optimizing controller to be used in air supplying system of the boiler, and expatiates on the idea of dividing the control process into two parts, dynamic and static to realize, thus meets the demand of homemade boiler economic running
本設計針對國產中、小型電站鍋爐燃燒系統參數時變、嚴重非線性、干擾因素復雜、耦合嚴重、模型不易確定的特點,提出多變量協調控制方案,解決了系統可控性差,難以實現穩定自動運行的問題;在此基礎上,改變以往以煙氣含氧量控制送風的傳統模式,針對國產電站鍋爐設備主體及一、二次送風迴路泄露嚴重,煤種混雜、成分不穩定、燃燒發熱值低、燃燒效率不高等問題,應用智能控制理論中的模糊控制技術,結合自尋最優控制的思想,設計了一種模糊自尋優控制器,應用在電站鍋爐送風控制系統上,並闡述了動靜態兩種實現途徑,通過在線優化風煤配比,實現最佳經濟燃燒,切實保障了鍋爐的經濟運行。Tantalum lithium ( litao3 ), a novel single crystal material, developed and industrialized with the development of communication and information industries recently, owns the excellent performances such as high mechanical - electrical coupling coefficient, lower wear - resistance, excellent high - temperature stability, excellent high - frequency capability, etc. however, researches on tantalum lithium single crystal wafer around world are still lacking
鉭酸鋰是近年來隨著通訊、信息產業迅速發展而開發並產業化的新型光電子材料。它具有機電耦合系數大、低損耗、高溫穩定性、高頻性能好等優良的壓電、電光和熱電性能。The signal sampling circuit fulfill the tasks of sampling signal and changing the double polarities signal to the single polarity signal ; the drive circuit receives the pwm signals from dsp and pass the signals to ipm through optical - couple devices ; the protective circuit safeguard the system against high current, high voltage, low voltage and high temperature on the ipm model
其中信號處理電路主要完成採集輸出電流和中間直流環節電壓信號,並對採集到的電流信號進行極性變換處理的功能;驅動電路接收dsp輸出的高頻驅動信號,通過耦合器件直接驅動ipm模塊;保護電路利用採集到電氣信號對整個系統實施保護,包括過電流、過電壓、欠電壓、 ipm模塊過熱等。It is found that the pyroelectric coefficient and susceptibility increase with the decrease of the magnitude of the long - range interaction and the interfacial coupling when the temperature is lower than the phase transition temperature
我們發現,在相變溫度以下,隨著雙層薄膜的界面耦合的減弱,鐵電雙層薄膜的熱電系數和介電極化率增加。We also find that the strong long - range interaction, the large transverse field and weak interfacial coupling can lead to the disappearance of some of the peaks of the pyroelectric coefficient and susceptibility of the ferroelectric bilayer. we believe that it is the reason why these phenomena always take place in the experimental studies
我們還發現,較強的長程相互作用,較大的橫場以及相對較弱的界面耦合作用將會導致鐵電雙層薄膜的熱電系數和介電極化率的某些峰消失,這可以用來解釋在實驗中常常觀測不到熱釋電系數和介電極化率的某些峰值的原因。The homogeneous state control equations with mechanic electric heat coupling effect of piezoelectric thermoelastic open shell is derived by uniting the static equilibrium equations, the charge displacement equilibrium equations and thermal flow equilibrium equations
依據此增維的本構關系,結合壓電熱彈性體平衡方程和熱平衡方程,成功地導出了壓電熱彈性體層合開口殼機、電、熱耦合問題的齊次狀態方程。The treatments simplifies greatly the solution programs which are often performed to solving non - homogeneous equation and second order differential equation on the thermal equilibrium and gradient relationship and the workload of numerical computation at same time
這類方法大大簡化了人們在分析壓電熱彈性體耦合問題時通常要求解的非齊次微分方程和關于溫度的平衡方程和導熱方程的二階微分方程的繁瑣方法,同時,齊次狀態方程的提出大大減少了數值計算的工作量。The paper establishes mathematics model of electromagnetic heating system of eddy current field and temperature field, and gives corresponding discrete format with elements as eight nodes, hexahedron equal cell, through calculating eddy - current field to gain the internal heat source that the temperature field needed, to use discrete method to solve the problem of induction - heating part ' s temperature field by axial symmetrical electromagnetic, and then to analyze the characteristic of instantaneous temperature field
本文建立了電磁加熱系統的渦流場和溫度場間接耦合的數學模型,分析了不同頻率下渦流和溫度的分佈情況,並以八節點六面體等參元為例給出了渦流場對應的離散格式,通過計算渦流場獲得溫度場所需要的內熱源強度,加熱部件的溫度場以軸對稱格式進行離散求解,並對瞬態溫度場有限單元法的求解特點進行了分析。After a simulated sample is given, we compute on this sample coupling analysis and steady non - linear analysis. by contrast with the experimental outcome of short circuit, we make certain that steady non - linear analysis should be used to analyze a true model. and then, we confirm the external conditions of finite element heat analysis after analyzing the cooling ways of multiple magnetic circuit transformers
2 、論述了有限元分析的電磁場和溫度場的理論基礎;製造出模擬樣機,分別用耦合場分析法和穩態非線性分析法對其進行計算,計算結果與其短路實驗結果進行對比,驗證了穩態非線性分析法計算結果的可信性;分析多磁路變壓器的冷卻方式,確定有限元熱分析的外部條件。Ii ) with the increase of the long - range interaction and the interfacial coupling, the pyroelectric coefficient before the phase transition temperature decreases
另外,隨著長程相互作用以及界面耦合強度的增強,相變溫度以下的熱電系數明顯減小。We obtain that i ) with the increase of the phonon - pseudospin interaction and the thickness of the superlattice, the phase transition temperature of the superlattice will increase. ii ) the increase of the phonon - pseudospin interaction leads to the change of the number of the pyroelectric peaks in the temperature curve of pyroelectric coefficient and to the change of the pyroelectric coefficient
研究發現,聲子與贗自旋的相互作用會影響鐵電超晶格熱電峰的數目以及熱電系數的溫度曲線的形態,而且聲子與贗自旋耦合作用的增強以及超晶格尺寸的增大都會使整個材料的相變溫度增加。The effects of the interfacial coupling and the thickness of one period on the pyroelectric properties of the superlartice are investigated by taking into account the long - range interaction
研究了長程相互作用對鐵電超晶格熱電性質的影響,並在考慮了長程相互作用的情況下,分別研究了界面耦合和尺寸效應對鐵電超晶格熱電性質的影響。The main work can be summed up as follows : firstly, we studied the thermal - field properties of vcsels, and analyzed the influences of current spreading, material parameters and operating conditions on the temperature distributions. secondly, we began with the electrode voltage and calculated the equipotential s distributions, compared the distributions of voltages and current densities in different depths of vcsels, and then studied the influences of the oxide - confining region with different position or thickness, and the different sizes of the gain - guided aperture and emitting window on the distributions of the injected current density, carrier concentration and temperature in the active region. thirdly, we realized the coupling of electricity, optical and thermal - fields, worked out the threshold voltage, calculated the distributions of the injected current density, carrier concentration and temperature under different offset voltages, and analyzed the impacts of temperature profile and carrier density on the refractive index, fermi levels and optical - field
具體工作可以概括如下:首先,研究了vcsel的熱場特性,分析了電流擴展,材料參數和工作條件對于溫度分佈的影響;其次,從電極電壓入手,計算出激光器中的等勢線分佈,並對不同深度處的電壓和電流分佈進行比較,研究了高阻區的不同位置和不同厚度、限制層和出射窗口半徑的大小對電流密度、載流子濃度和溫度分佈的影響;再次,實現了電、光、熱耦合,求出了閾值電壓,計算了不同偏置電壓下的電流密度分佈、載流子濃度分佈和熱場分佈,分析了溫度和載流子濃度變化對折射率、費米能級和光場的影響;最後,給出了考慮n - dbr和雙氧化限制層時激光器中的等勢線分佈,分析了n - dbr和雙氧化限制層對vcsel電流密度、載流子濃度、溫度和光場分佈的影響。The great engineering software ansys was used to simulate the induction heating process of a continuous casting square billet in multi - physical coupling field based on the electromagnetic induction and heat exchange theory
摘要根據電磁感應理論及傳熱基本原理,利用大型工程軟體ansys對連鑄方坯的感應補熱過程進行了多物理場耦合的有限元模擬,並對鑄坯斷面上的溫度梯度、磁場分佈等進行了分析。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。In the present paper, according to the characteristics of the dynamic running of the thermoelectric refrigerating devices and its components for the refrigerator is analyzed and the independent components " models are established. the entire model describing the working procedure of the refrigerating system is set up with the method of parameters coupling to combine the models of the refrigerating system, load, cabinet and air in the cabinet. the running characteristics of thermoelectric refrigerators on the effects of received current, load and ambient temperature are investigated using small - signal linearization method
本文根據熱電製冷系統動態運行的特點,分析了電冰箱製冷系統及各個部件的熱物理過程,運用參數耦合的方法把製冷系統、負載、箱體及箱內空氣模型有機地結合在一起,建立了完整的製冷系統工作過程模型,用小階躍信號線性化法分析了電流、負載功率和環境溫度波動共同作用下的熱電製冷器工作特性。Accordingly, a new framework, which provides a common scheme for the numerical simulation on the macroscopic behavior of ferroelectrics though multi - scale analysis on the coupled thermo - electrics - mechanical behavior of multiphase in heterogeneous material, is induced to construct the effective constitutive equation of multiphase. in chapter four, based on the law of domain nucleation and domain wall motion of 1800 domain switching, a new scheme of domain switching and numerical simulation approach is put forward on the foundation of thermodynamics. driving traction, nucleation criterion, velocity of domain wall motion, kinetic relation and rate of domain switching in a single grain are given
第四章以鐵電體1800疇變的過程中形核規律和疇界運動規律的實驗觀察結果為基礎,根據熱力學理論建立鐵電體疇變的理論框架和數值模擬方法;給出了單疇內疇變驅動力、新疇形核準則、疇界運動速度公式、疇變動力學的表達式,單晶的疇變速率公式;用細觀力學的觀點給出了對多晶鐵電體多場耦合的有效性質進行包含疇變速率影響的多尺度分析方法。The theory and basic equations of piezothermoelectric elastic medium were established by analyzing the function mechanism of piezothermoelectric coupling field
分析熱壓電耦合場的作用機理,建立熱壓電彈性介質理論和基本方程。分享友人