極化變換 的英文怎麼說
中文拼音 [jíhuàbiànhuàn]
極化變換
英文
polarization conversion-
Mems ( micro electromechanical system ) has become one of the most rapidly development technologies. along with the rapid development of mems techniques, capacitive sensor is used widely whose capacitance changes small, which has put forward the new request to the measurement technique. the common measure for capacitance measurement is that convert capacitance to voltage, electric current or frequency. the area of polar plate of the capacitor becomes smaller and smaller, and the total capacitance of micro capacitive sensor is usually several pico farad only. as a result, its change amount is smaller
Mems （ microelectromechanicalsystem ）近年來發展最快的技術之一，隨著mems技術的快速發展，電容式加速度計的電容變化變化量越來越小，對檢測技術提出了新的要求。在電容式傳感器中，常用電容檢測電路是將其轉換為電壓、電流或者頻率信號。目前的微型電容傳感器的極板面積變得越來越小，電容總量只有幾個pf ，變化量就更小。As we all known, with the founding of euclidean geometry in ancient greece, with the development of analytic geometry and other kinds of geometries, with f. kline " s erlanger program in 1872 and the new developments of geometry in 20th century such as topology and so on, man has developed their understand of geometry. on the other hand, euclid formed geometry as a deductive system by using axiomatic theory for the first time. the content and method of geometry have dramatically changed, but the geometry curriculum has not changed correspondingly until the first strike from kline and perry " s appealing
縱觀幾何學發展的歷史，可以稱得上波瀾壯闊：一方面，從古希臘時代的歐氏綜合幾何，到近代解析幾何等多種幾何的發展，以及用變換的方法處理幾何的埃爾朗根綱領，到20世紀拓撲學、高維空間理論等幾何學的新發展，這一切都在不斷豐富人們對幾何學的認識；另一方面，從歐幾里得第一次使用公理化方法把幾何學組織成一個邏輯演繹體系，到羅巴切夫斯基非歐幾何的發現，以及希爾伯特形式公理體系的建立，極大地發展了公理化思想方法，不管是幾何學的內容還是方法都發生了質的飛躍。Thus the whole transformation process is expatiated on
闡述極化變換整個過程。The effect of yield and grain protein content with soil water content and nitrogen ( or nitrogen and p2o5 ) was described by isopleth
用極差變換將產量和蛋白質含量理論值標準化，其標準值曲線的交點即為二者的最佳結合點。The high entropy of the real and imaginary parts of sar raw data makes lossless - coding compression techniques unfit for sar raw data. in chapter 4, some compression algorithms for sar raw data compression, such as baq, upq, bavq and wt - subbandcade are analyzed and discussed. an improved unrestricted polar quantizer ( upq ), which can enhance the performance of the quantizer is put forward
第四章分別對塊自適應量化（ baq ）演算法、非約束式極坐標量化（ upq ）演算法、塊自適應矢量量化（ bavq ）演算法和小波變換子帶編碼演算法進行了分析和研究，並詳細討論了這些演算法在工程實際中的應用。Fast algorithms of both discrete and orthonormal wavelet and wavelet packet coefficient are diagrammatized to be introduced. daubechies wavelet is applied to help to discuss the application and test on signal filtering and noise reduction with the principle and threshold implementation ; the basic principle to pickup the fault characteristics is introduced mainly about the relations between the maximum module and signal saltation point and how to characterize the saltation point with lipschitz exponent
展示了離散正交小波變換的mallat快速演算法和小波包系數分解的快速演算法；重點應用daubeches小波探討了小波變換在信號濾波去噪中的應用和實驗，闡述了其基本原理和通過閾值化處理實現濾波的具體方法；探討了用小波變換進行故障特徵提取的原理，說明了小波變換模極大值和信號突變點之間的關系以及怎樣用李氏指數來表徵突變點的性質。So, how to consider about these factors and design out suitable dc / dc converter becomes very important. at the same time, it helps a lot to bring the fuel cell to market use
因此，如何綜合考慮這些因素，合理設計符合要求的dc / dc變換器就顯得尤為重要，同時這對于燃料電池的市場化推廣應用也具有極其重要的意義。Third, this thesis analyzes the angle - control theory based on half bridge converter, and proposes a new way to find the optimized angle. simulation is performed to verify the results. then, this thesis introduces the hardware and software design of the digital control system of doubly salient electro - magnetic motor, which mainly discusses the speed and current loops and angle optimization control
再次，本文介紹了角度控制與電機轉向的關系，並對基於半橋變換器的電勵磁雙凸極電動機換相角與相電流及輸出轉矩的關系進行了理論分析和模擬驗證，提出了優化電勵磁雙凸極電機換相角的方法。At present, people usually use birefrigence and quasi - phase - matching methods to achieve higher effiency in the process of conversion. a significant advantage of quasi - phase - matching method is that the interaction is occurred through the largest element of the x ( 2 ) tensor ; the period of optical superlattice can be designed randomly, and any interaction can be matched without walk - off angle ; they are fitted to be used in frequency conversion of lower power especially. the quasi - phase - matching method has some advantages over birefrigence method, improving the efficiency of frequency conversion ; the range of frequency conversion covers its whole transperant wavelength
由於準相位匹配技術有其獨特的優勢，可以利用非線性光學晶體的最大二階極化張量，如ppln 、 pplt 、 ppktp用的非線性極化張量都是d _ （ 33 ） ，其有效非線性系數高出普通非線性光學介質（如bbo 、 lbo 、 ktp ）一個數量級，而且可以人為靈活設計調制周期，通過周期設計其頻率變換范圍可以覆蓋準相位匹配介質的整個透明波段，選擇無走離效應，解決了常規pm難以解決的問題，拓寬了非線性晶體的應用范圍，極大地提高了頻率轉換效率，已成為非線性光學材料和固體激光器的研究熱點之一。When the charge changes the tourmaline begins to oscillate, similar to a rock crystal but much more pronouncedly
產生變化，在放電過程中正負極會互換，所以它呈現如同水晶石般的震動，但卻更強大。Performance for a piezoresistive transducer pressure sensor to thermal and pressure environments can be predicted by finite element method. a simplified 1 / 8 model, considering silicon dioxide and nitride process as well as stack anodic bonding and adhesive bonding processes, was developed. the fem results were found to be comparable to experimental data. case studies suggested that pyrex stack induces certain amount of non - linearity, while it isolates hard epoxy nonlinear effect. flexible epoxy bonding or soft adhesive bonding is preferred to the packaging process. the viscoelasticity and viscoplasticity of bonding material will result in hysteresis and drift errors to sensor output. however, soft adhesive s influence on sensor can be ignored under relative stable environments. more over, detailed design and process information will help to improve modeling application
熱、壓環境下壓阻變換壓力傳感器的性能可以通過有限元方法預測.這里研究了簡化的1 / 8模型，模型考慮了二氧化硅和氮化硅生成過程及堆陽極鍵合和膠粘結合過程.結果發現有限元預測結果和實驗數據具有可比性.範例研究表明，硼硅堆導致產生一定的非線性，但它隔離了硬環氧樹脂的非線性.在包裝過程中最好使用柔性環氧黏合或軟黏膠性結合.黏合材料的黏彈性和黏塑性將會導致傳感器輸出的滯后和漂移誤差.然而，在相對穩定的環境下，軟黏合劑對傳感器的影響可以忽略.此外，詳細的設計和過程信息有助於提高模型的適用性The main results indicated that : significant differences exist in diurnal average transpiration rate and the range of diurnal transpiration rate ; the transpiration rate of sawtooth oak, amorpha, lalang grass varied with a regular double apex rhythm, but that of the rest varied with a regular single apex rhythm, stomatal conductance play a maximal important role in transpiration rate, temperature ( air temperature, the earth ' s surface temperature ) also influence the transpiration rate ; transpiration rate has prominent negative correlation with the relative air humidity, the biggest coefficient is 0. 866
筆者對日照沿海防護林幾種主要木本植物和草本植物的蒸騰速率和環境因子的關系進行了研究，結果表明： 8種植物日平均蒸騰速率和蒸騰速率日變幅各異；麻櫟、紫穗槐和白茅的蒸騰速率日變換呈現出雙峰式的變化規律，其它5種植物蒸騰速率表現為單峰式的變化規律；氣孔導度影響著植物的蒸騰速率，溫度（氣溫、地面溫度）是影響植物蒸騰速率的主要因子；空氣相對濕度和蒸騰速率表現為顯著或極顯著負相關，相關系數高達0 . 866 。Under single polarized measurement, wavelet transform is used to filter noise, recognition results of target are evidently raised. against the conventional definition, a new time - frequency range profile is present, thereby the more accurate features of target can be picked up and identified. secondly, methods of conductor imaging are studied
對一維距離像的特性進行了分析；利用小波變換濾噪提高了單極化下基於目標一維距離像的識別率；相對一維距離像的傳統定義提出了時頻距離像的新定義，從而更為精確地反映目標的精密結構特徵。The properties of the weak - coupling bound polaron in quantum well are studied using the linear combination operator and the unitary transformation method
摘要採用線性組合算符及幺正變換方法研究了磁場對量子阱中弱耦合束縛極化子的性質的影響。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
摘要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。First we introduce theory and merits of graphic wavelet transform, then mallat algorithm, multi - scale characteristic, quadratic b - alpine wavelet and the coefficients of this filters, and etc. later we calculate the gradient matrix based on the result of wavelet transform, thin the contour and get spatical information
先介紹圖像小波分解方法的原理、 mallat快速演算法、多尺度特性、 3階b -樣條小波基函數的選取及其濾波器系數的推導等，然後根據小波變換結果計算梯度矢量矩陣，進行非極大值抑制和雙閾值化，提取目標輪廓。Analysing circle characters and the feasibility of using it to quality assessment of point group generalization, a new method of assessing point cluster geometry quality is developed based on the technique of polarization transformation
摘要分析圓特性及其運用到點群綜合質量評估中來的可行性，提出一種基於極化變換的點群幾何質量評估方法。In this method, the principal axes method is used to estimate the parameters of the transformation, then with the estimated pamameters as the initialization of powell optimization method and with all of the available information as the feature, a high accurate registration is achieved by calculating the minimum standard deviation between the registered images
該方法首先採用主軸法對變換參數進行初步估計，之後採用powell最優化演算法，利用全圖像灰度信息來作為圖像的參考特徵，通過計算配準圖像之間差的平方和的極值來實現圖像配準，從而提高了配準精度。Firstly, the first eight singular point quantities are computed and conditions for infinity to be a center are deduced as well, then a system that bifurcates eight limit cycles in the neighborhood of infinity are constructed
首先通過同胚變換將系統無窮遠點轉化成原點，然後求出該原點的前8奇點量，從而導出無窮遠點成為中心和最高階細焦點的條件，在此基礎上給出了五次多項式系統在無窮遠點分支出8個極限環的實例。After research surface reconstruction with triangular facets, contours of first layer and the last layer are triangulated with layer separation algorithm firstly. and then the least polar - angle criterion is presented for linking two convex contours, and the method is also given in which non - convex contour is transformed to a set of convex contour. with the splitting and integrating algorithm, the single - to - multi - contour reconstruction with triangular facet has been simplified to one - to - one contour
首先採用層析式演算法對起始層和結束層中的輪廓進行三角剖分；然後採用最小極角法實現兩凸輪廓間的三角片重構，並討論了非凸輪廓變換為凸輪廓的方法；最後，使用分裂與合併技術將單輪廓匹配多輪廓的三角片重構簡化為單輪廓之間的三角片重構，最終完成整個骨骼表面的三角片重構。分享友人