電導變量法 的英文怎麼說
中文拼音 [diàndǎobiànliángfǎ]
電導變量法
英文
conductance-variation method-
In this dissertation, through computer simulation, the problems of modeling, control and guidance of auvs are presented. the first part of this dissertation addresses the problem of dynamically modeling of auvs, and derives thrusters " two - dimension nonlinear dynamic model, which has axial flow speed and propeller rotational velocity as two state variables, voltage or current of motor as inputs, and thruster force and torque as output. the second part focuses on the nonlinear adaptive sliding mode control of auvs in diving plane and steering plane
本論文系統研究了自主式水下航行器的建模、非線性自適應滑模控制、以及深度調整和水平面導引方法等問題，具體成果和創新點如下1 、根據流體力學理論，建立了螺旋槳推進器的動態模型，它以螺旋槳來流速度v _ p和螺旋槳轉速n為狀態變量，以電機施加轉矩為輸入，螺旋槳推力t和轉矩q為輸出。According to the topology of the substation and resistance measurements of down - leaders, the erosion diagnosis equation is built and the resistance variations of grounding grid branches are solved, and the erosion of grounding grid could be found through the fuzzy diagnosis regulation
利用接地網拓撲結構圖及接地網引下線間的電阻測量值，建立腐蝕診斷方程，通過求解診斷方程，計算出接地網支路電阻值變化量，採用模糊診斷方法判斷出接地網導體腐蝕的情況。The addition formula of spherical harmonics function of degree n and order 1 is derived using the relations between coordinate varieties after coordinate rotating and the property of the associated legendre polynomial. the relations among the magnetic vector potential, the modified magnetic vector potential and the second - order vector potential ( sovp ) are shown going forward one by one. it is explained that the solutions of electromagnetic fields in different coordinate systems can be transformed and an example having analytical solution is given
利用坐標旋轉后球坐標變量間的關系和連帶勒讓德多項式的性質推導得到了n次1階球諧函數的加法公式；以遞進的方式說明磁矢量位、修正磁矢量位與二階矢量位的關系，寫出了引入二階矢量位的過程；以時諧場矢量邊值問題為例，闡明了不同坐標系下電磁場解的相互轉化原理，給出了一個解析解的轉化例子；在球坐標下，引入了較球矢量波函數更普遍的兩類矢量函數，給出了其在球面上的正交關系。2801 and lbg was used as polymer matrix because of their different hfp ratio, dbp was used as plasticizer. the films were made by bellcore method. structure, crystallinity, liquid uptake and conductivity of the films with different ratio of pvdf dbp sio2 was determined
本文用hfp含量不同的2801和lbg為基體， dbp為增塑劑，採用bellcore方法制膜，得到了聚合物電解質的結構、結晶度、吸液量和電導率隨sio _ 2 、增塑劑含量、聚合物結晶度的變化規律，並對納米無機粒子改性聚合物電解質的機理進行了一些探討。In this article, the bellcore method was used to prepare polymer electrolyte membrane based on pvdf - hfp, and polymer electrolyte membranes under different conditions were prepared by changing sorts of solvents 、 ratio of dbp and solvent. effects of ratio of plasticizer and solvent on the liquid uptake 、 sem 、 mechanism capability 、 ionic conductivity 、 electrochemical stability window of polymer electrolyte membrane were also studied. through optimizing the preparation technics, the integrated effects of additives such as pc 、 ec 、 dbp and nanophase al2o3 on the ionic conductivity 、 liquid uptake were studied
本文以聚偏氟乙烯-六氟丙烯共聚物pvdf - hfp為基質，採用bellcore制膜法制備了pvdf - hfp聚合物電解質膜，通過改變增塑劑dbp的含量、溶劑的種類及溶劑的含量制備了不同條件下的聚合物電解質膜，分別研究了增塑劑含量、溶劑含量等對聚合物電解質膜的吸液率、表面形貌、機械性能、離子電導率、電化學穩定窗口等的影響;對制備工藝進行了優化，研究了各種添加劑如pc 、 ec 、 dbp及納米al2o3對聚合物電解質膜的離子電導率、吸液率等性能的綜合影響。Conductivity reconstruction, one kind of electromagnetic measurement, reconstructs conductive property distribution of the biological tissue exposed to electromagnetic fields by measuring the fields around it. this thesis presents the application of improved genetic algorithm to reconstruct the conductivity distribution of stratified biological tissue by measuring the change of impedance in the coil
本文主要研究在載流線圈作用下，通過測量生物組織產生的二次場對線圈阻抗的改變，應用改進的遺傳演算法重構分層生物組織各層電導率和厚度的方法。Since high tc superconducting ( hts ) tapes for practical applications became commercially available over the past few years, the development of superconducting power technology has achieved significant progress. it is foreseen that superconducting technology will be the prevailing high technology of the 21st century, and that superconducting power equipment will be commercialized soon, enjoying a large - scale worldwide market before 2010. china ' s economy is expanding fast, and the demand for electricity is increasing quickly. at the same time, higher electricity quality will be required. traditional power technology will no longer be able to satisfy future requirements, so superconducting power technology would be the best solution, leading a revolution in the power industry. the history, present status and prospects of superconducting power technology as well as the economic benefits and basic physics problems involved are reviewed
人們認為，超導體在電力方面出現大規模應用的時間距離我們還非常遙遠.然而，隨著最近幾年來實用高溫超導材料的研製取得重大的進展，高溫超導電力技術的應用已經成為現實，預期將在2010年左右出現大規模的應用，並將帶來電力工業的革命.因此，下一個10年將是國際超導技術競爭最關鍵的10年.我國的經濟發展很快，電能需求量增加十分迅速，對電能質量的要求也越來越高.常規電力技術已經無法滿足我國電力發展的需要，超導電力技術是實現我國電力發展目標的必由之路.文章有代表性地介紹了超導電纜、超導限流器、超導磁儲能系統、超導變壓器和超導旋轉電機等的基本工作原理及研究發展歷史，並著重介紹高溫超導電力應用研究的現狀、應用前景、經濟可行性及基本物理問題The vector magnetic potential of a system consisting a line electric current and an infinite long magnetic dielectric column is calculated with the method of separation of variables and method of images, it is pionted out that the vector magnetic potential of a system consisting a line electric current and a magnetic dielectric plane, an ideal paramagnetic column, a superconductor column, and a line electric current in homogeneous magnetic field can all be deduced from our calculation
摘要用鏡象電流法和分離變量法計算了線電流與無限長磁介質圓柱系統的磁矢勢，指出線電流與無限大磁介質分界平面、線電流與超導體圓柱、均勻外磁場中有磁介質圓柱系統時的磁矢勢都可以由線電流與磁介質圓柱系統的磁矢勢的極限情形給出。The tests of e - o applications by our flux ktp has been realized, the results showed : optical waveguides fabricated by using an ion - exchange process, which have an exchange - ion concentration depth profile and refractive - index profile, is close to a complementary error - function distribution, optical homogeneity and device thermal stability is much better. amplitude modulation switch formed by our flux ktp has the contrast ratio of 150 : 1 and insert loss is 2. 5 % at 1064 nm. high quality optical pulse with 1 ns width was cut successfully by using an e - o modulator from a laser pulse with 50 ns width, this modulator had run for three years, and the crystal did n ' t blackened, it showed our low conductivity flux ktp can endure high modulation voltage for a very long time
Ktp晶體的電光應用試驗表明：用離子交換法製作的電光波導，其離子交換濃度、折射率變化符合餘弦誤差函數，光學均勻性以及器件的溫度穩定性較好；製作的強度調制電光開關，消光比為150 ： 1 ，對1064nm激光的插入損耗為2 . 5 ；製作的電光調制器用於激光脈沖整形試驗，從脈沖寬度50ns的激光脈沖削出脈寬1ns的高質量光脈沖，該電光開關經過長達三年多的使用，沒有出現晶體變黑現象，說明本實驗的低電導率ktp晶體能夠耐受長時間的調制電壓。Tem reveals that the complex possessed good dispersibility in the system and the status varied reversibility with the ph value and the size of the complex is within 20 ~ 40nm. the complex was characterized by ft - ir, uv - vis, fluoresence and electrical conductivity methods. paa - ag nanospheres were also synthesized by coordination of polyacrylic acid and silver ( i ) ion and queued in line in lr
本論文還以低分子量的聚丙烯酸和硝酸銀為主要原料，通過控制體系的ph值合成響應環境ph值變化的聚丙烯酸銀納米微球和納米柱狀物，通過tem觀察尺寸達20 - 40nm ，用ir 、 uv - vis 、熒光、電導率法分析聚丙烯酸和銀的配位作用、所形成配合物的組成與結構，並將聚丙烯酸和硝酸銀置於「線性反應器」中進行配位聚合，合成出線性排列的paa - ag納米微球。Abstract : tensile reducer is one of the necessary apparatuses during the pipe production process at present. this paper deduces a multi - variation formula by using the energy principle and adopting upper limit method. the formula can be used to calculate the parameters such as the drive power, tensile coefficient, roll speed, depth of exit pipe wall, hole type ellipse etc. the existence of minus drive power has also been theoretically calculated
文摘:張減機是鋼管生產中不可缺少的設備之一.本文從一般能量原理出發，採用上限法推導出一個多變量公式，利用該公式可求解電機功率、張力系數、軋輥轉速、出口鋼管壁厚、孔型橢圓度等參數，並且從理論上計算出電機負功率的存在Then, based on the estimation algorithm decomposing the measurement of voltage scope and power scope, the problems of the location of transformation tap settings and the tide current estimation of zero - impedance branches in state estimation are solved ; and detection and identification of bad data in state estimation are deduced and stimulated, also a hybrid method of detection and identification is brought forward
隨后，在基於分解電壓測量量和功率測量量的估計演算法的基礎上，對狀態估計中經常出現的變壓器抽頭位置問題和零阻抗支路潮流估計問題進行了分析和處理；對狀態估計的不良數據檢測與識別方法進行了推導和模擬，並提出了一種混合檢測方法。A coherent electromagnetic pulse in the range between the far - infrared and microwave region is used as a detection source. the amplitude of the wave is recorded by electro - optical or photoconductive sampling. after fast fourier transform, the amplitude and phase of the wave is given, then the complex refractive index standing for the absorption and dispersion of the material in thz region is extracted
Thz （ 10 ~ （ 12 ） hz ）時域光譜技術是20世紀90年代發展起來的一種新型的光譜測量技術，它使用頻率介於遠紅外和微波之間的相干電磁輻射脈沖作為探測源，利用電光取樣或光電導取樣的方法直接記錄thz輻射電場的振幅時間波形，通過傅立葉變換得到測量信號振幅和相位的光譜分佈，進而獲得材料在thz波段的復介電常數，即色散及吸收等信息。Abstract : we conduct a theoretical study on the properties of a bound polaron in a quantum well under an electric field using linear combination operator and unitary transformation methods, which are valid in the whole range of electron - lo phonon coupling. the changing relations between the ground - state energy of the bound polaron in the quantum well and the coulomb bound potential, the electric field strength, and the well width are derived. the numerical results show that the ground - state energy increases with the increase of the electric field strength and the coulomb bound potential and decreases as the well width increases
文摘:採用線性組合算符及幺正變換方法研究了電場對量子阱弱耦合束縛極化子的性質的影響.推導出量子阱中束縛極化子的基態能量和庫侖束縛勢、電場和阱寬的變化關系.數值計算結果表明，基態能量因電場和庫侖束縛勢的不同而不同，隨電場和庫侖束縛勢的增大而增大，隨阱寬的增大而迅速減小By using the method of separation of variables, a recursive formula was derived for the electromagnetic fields in a circular coaxial cable with a radial conductor plate and filled with multilayered homogeneous isotropic media, and the relationship between the first and the nth layers of the electromagnetic fields was determined
摘要採用分離變量方法，推導了有徑向導體板、填充均勻的多層各向同性介質的同軸線各層電磁場之間的遞推關系，得到了第1層與第n層介質中電磁場的關系方程。By adopting appropriate transformation, this paper transform the heat conduction equation with internal heat source into a non - source heat conduction equation, and then solve the problem successfully by the method of separation of variables
其關鍵方法是：通過將電場量引入溫度場方程，作適當變換，把含內熱源的熱傳導方程轉化為不含內熱源的熱傳導方程，然後採用分離變量法進行求解。Taking the soft ? sensing of oxygen content in flue gas, unburned carbon content in fly ash and coal load in ball mill as examples, we emphatically analyze the current status, modeling method of their soft ? sensing and the secondary variable selection in the soft ? sensing ; and also summarize some other thermal parameter soft ? sensing techniques in our country, which is a guidance for the development of the thermal parameter soft ? sensing technique in power plant, and has some value for the optimization of thermal control systems
以煙氣含氧量、飛灰含炭量、球磨機負荷為例，著重分析和總結了其測量的現狀、軟測量建模方法和二次變量的選取，並概括了國內現有的其他熱工參數軟測量技術，對火電廠熱工參數軟測量技術的發展具有一定的指導意義，對熱工控制系統的優化具有一定的參考價值。At first, buck - boost circuit is detailed analyzed and derived strictly in the theory, and on the base, the current of the inductance and the output voltage are analyzed elaborately. when the input voltage is the ac voltage with the nomal frequency, the two variable quantity are analyzed and some conclusions are concluded by means of equal length separation methods and introducing function methods and derivative - equation methods. and this is the basis of the next proceeding
首先，對buck - boost電路進行了嚴謹地理論推導，先對buck - boost電路在輸入為直流電壓時的工作情況進行了分析；在此基礎上，對輸入為工頻交流電壓時的電感電流、輸出電壓作了詳細分析，利用等間距離散化方法、引入函數法、微分方程法分別對變量進行了推導和總結，為下一步工作奠定了理論基礎。The authors have developed a device for measuring the normalized difference vegetation index ( ndvi ) by using four specially designed photoelectric detectors ; the ndvi can reflect the growing information and seasonal nitrogen fertilizer requirement of crops, and offers guidance for rational application of nitrogen fertilization
文中提出了一種由4個專門設計的光電探測器直接得到歸一化植被指數的測量方法，該參數能夠反映作物的生長狀態，知道不同季節的農作物對氮的需求量，對實施變量精準施肥具有重要的指導作用。In order to meet the needs of real time computation of electric power system state estimation, the estimation algorithm based on decomposing the measurement of voltage scope and power scope and the estimation algorithm based on the measurement transformation of the equivalent current are brought forward and deduced in this thesis. these two algorithms all can make the jacobian matrix a constant matrix and they are stimulated
為了滿足電力系統狀態估計實時性的要求，本文首先提出並推導了可以使雅可比矩陣為常數陣的基於分解電壓測量量和功率測量量的估計演算法和基於等效電流測量變換的估計演算法，並對此進行了模擬。分享友人