正弦形基波 的英文怎麼說
中文拼音 [zhēngxiánxíngjībō]
正弦形基波
英文
primary sinusoid-
On basis of the producing fact of kiu ming heavy machine ltd, the author get much fact material through inner research, and presents a imagine of new corrugated - web structure of overhead traveling crane. through enough compare and argumentation, this paper presents using sine curve as corrugated sheet of web
作者根據昆明重機股份有限公司的生產實際，深入調查研究，在掌握大量生產應用實際的資料基礎上，提出了橋式起重機的箱形主梁的新型波形腹板結構的設想，並在充分比較和論證的基礎上提出了以正弦曲線波形作為腹板的波形。Biology, etc. owing to many merits has not yet been used to measure parameters of gratings. the paper researches on the subject in view of current lack of it. the main tasks of the paper include : analyzing ellipsometric characteristics of gratings in detail with vector diffraction theory and ellipsometrics ; devising a reflective quarter wave plate at normal incidence according to some ellipsometric characteristics ; making use of normal simplex algorithm during ellipsometric inversion of gratings parameters, inversing ellipsometric parameters with gaussian noise of different standard deviations to simulate actually measured values with examples of isotropic metallic and anisotropic step gratings and testing that ellipsometry about gratings parameters is feasible with the range of certain precision ; discussing choice of incidence angle at length
本論文的主要工作包括：結合光柵的矢量衍射理論和薄膜的橢偏理論，詳細分析了光柵的橢偏特性；並且根據一些橢偏特性設計出一款正入射反射型單波長1 4波片；在光柵參數的橢偏反演中，引入正單純形法作為反演演算法，分別以各向同性的正弦形金屬光柵和各向異性的階梯型光柵為例，在標準橢偏值的基礎上加入不同偏差的高斯噪聲來模擬實際的橢偏測量值進行反演，在一定精度范圍內得出滿意的光柵參數，說明光柵參數的橢偏測量是可行的；還就入射角的選取問題進行了一定的探討。Most of the traditional real - time detecting method for harmonic current is based on sinusoidal voltage or locking the voltage phase accurately, which deviating from the real circumstances
由於傳統的諧波電流實時檢測方法大都是基於正弦的電壓系統或對于電壓波形達到精確鎖相的前提，而現實情況卻往往不是如此。The method to get the parameters for each basic waveform was given by choosing the sine window function waveform as the basic waveform, and based on the srs time - history synthesis principle
依據沖擊響應譜時域合成的一般原則，選擇合成小波中的正弦窗波作為基本波形，給出了確定各基本波形的波形參數的方法。The inverted pwm changing electric current the technique is applied in the prototype model. the prototype model was tested and operated on spot, power factor could reach beyond 0. 95, the effect of following modulating voltage was better, the curve of factor of modulated voltage of exchanging systems changed following load rate was linear, the output of wave form was a flat and steady sinusoidal wave
樣機採用了逆變式pwm變流技術，對其進行了現場測試與試運行，測試結果是電網側的功率因數可達0 . 95以上，跟蹤調壓效果良好，變流系統輸出調壓系數（ k ）隨負載率（ p ）的變化曲線基本滿足直線關系，輸出波形呈平滑穩定的正弦波。Sinusoidal profile and triangular profile are chosen as the bottom profile, and the undulated profile varies periodically. newtonian fluid and non - newtonian fluid are considered in each flow model
選取兩種波形底板模型:一種為正弦板基面;另一種為三角板基面，其輪廓曲線分別為周期變化的正弦和三角形曲線。At last the components of the system are modeled and simulated with matlab software. the simulation results indicate that the combined system can reduce the capacity of apf effectively, detecting the harmonic current effectively, compensating harmonic current effectively
結果表明，對單位容量的諧波源，採用與可變參數lc濾波器混合使用的並聯型有源電力濾波器系統，能夠有效地減少有源濾波器的容量，有效地檢測出高次諧波分量，並進行諧波補償，使系統的電流波形基本保持正弦。The prototype test results indicate : voltage mode and current mode ac - ac mode ac / ac converters with high frequency link have the advantages such as high frequency electrical isolation. simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, no audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type regulated sinusoidal ac power supply, electronic transformer, ac regulator, and wave converter etc
試驗表明，這類變換器具有高頻電氣隔離、電路拓撲簡潔、兩級功率變換（ lfac hfac lfac ） 、功率密度高、雙向功率流、無音頻噪音、變換效率高、網側功率因數高等優點。為新一代正弦交流穩壓器、電子變壓器、交流調壓器、同頻波形變換器的實現奠定了關鍵技術基礎。Many types of dynamic load can be used to analyze the problems of interaction of soils and structures with this program. and it is necessary to use effective stress method to study dynamic deformation problems of soil subgrade. for convenience, traffic load is simplified as half - sinusoidal load, and the soil of subgrade is assumed to be strain - hardening
將交通荷載簡化為半波正弦荷載，假定地基土體為硬化型土，運用本文編制的動態彈塑性有限元程序，分析了單次動力加載和循環動力加載條件下道路橫截面與軟土地基共同變形特性。Based on the analysis of stable and transient waveforms in the power system, the paper use the exponent - typed signal to describe the signals in the power system including the dc element, fundamental, harmonics, interharmonics, subharmonics and the attenuation of the dc element and the sine waveform
根據對電力系統暫、穩態信號波形的分析，本文用指數型信號來描述電力系統信號（包括直流分量、基波、諧波、間諧波、次諧波以及衰減直流分量、衰減正弦波等） 。The volume of the output filter can be reduced greatly used in cascade inverter with carrier - phase - shifted spwm technology which has a high equivalent switching frequency and a good output sine wave. it is the base of the high power density of asi
載波移相正弦脈寬調制技術有獨特的消諧波優勢，其等效開關頻率高，輸出波形正弦度好，可以大幅減小濾波器體積，為實現系統的高功率密度奠定基礎。Firstly, according to the characteristic that the doppler frequency shift signal can be approximated as a single sinusoid signal, the extended sinusoid signal retrieval ( pisarenko and esprit ) methods are presented and signal state and measurement formulations are developed, so the kalman filter recursive method is got. the brief introduction of low velocity moving target doppler frequency shift signal wigner - ville transformation and wavelet transformation expression are presented in this paper. secondly, because the clutter is gaussian distribution, cumement and high - order spectrum based methods are presented and the simulation results prove their good performance to suppress gaussian clutter in low velocity moving target doppler frequency shift signal processing
一個方面是根據低速目標的多普勒信號可簡化為單一正弦波形式這一特點，得到了擴展的高斯色噪聲背景下的諧波恢復演算法，即高斯色噪聲中的pisarenko諧波恢復法和旋轉因子不變法（ esprit ） ；並推導了信號的狀態方程和觀測方程，進而得到基於卡爾曼濾波的遞推演算法對信號進行提取；本文還簡單的介紹了低速運動目標的多普勒頻移信號的wigner - ville變換與小波變換；另一個方面是針對雜波服從高斯分佈這一特點，提出了對接收信號求累積量和高階譜來對高斯雜波進行抑制。On base of listing the technical index of switch power supply, basal principle and circuit, the chapter expounds the scheme and comes into being. chapter four is a main chapter, that expands the design and realization of control cell, lists the circuits and programs
第三章重點介紹了超聲治療的高頻正弦波產生電路的設計與實現，在詳細列出了開關電源的技術指標、基本原理、基本電路形式等基礎上給出了該系統採取的設計方案。This thesis mainly studies sinusoidal - and trapezoidal - current compound driven technology of the rare earth permanent magnet ( repm ) motor. first we respectively explore the characteristics of both sinusoidal driven and trapezoidal driven control technologies, and then study the connection between them
首先從正弦波驅動電機和方波驅動電機的基本概念和數學模型著手，分別探討正弦波驅動電機和方波驅動電機控制的特點，然後尋找方波驅動電機和正弦波驅動電機的內在聯系，將其有機的結合起來，從而形成獨具特點的復合驅動控制策略。Therefore, it has been widely used in the domains of communication, radar, navigation, etc. this article focuses on the generating of the function waves which include sine wave, triangle wave and square wave, depict the concepts of dds ( direct digital synthesis ) and surveying frequency on equal precision, analyze the key techniques in the development and present solutions of function generator. author also present the system structures of hardware and software, discuss the performance indexes and consider the possibility of the system. finally, with respect to the problems in debugging and testing process, author do some analyzing and present the practical solutions
本文主要圍繞函數發生器輸出的正弦、三角和方波三種基本波形的產生這一課題來展開，闡述了其中的直接數字合成（ dds ） 、等精度測頻等概念;分析了研製函數發生器所需攻克的關鍵技術，提出了技術解決途徑;對方案軟體進行編制和系統進行設計、安裝調試，實現了課題功能;最後針對調試中出現的問題，進行了較深入的分析，並提出了實際的解決措施。Secondly, this paper details the basic theory of fourier transform, and the problems which must be paid attention to in the practical application. the reasons of the error caused by the traditional electric signal detection methods based on the windowed dft are thoroughly analyzed. besides, many cosine windows are introduced
其次對傅立葉變換的基本理論、基本形式以及實際應用中應注意的問題進行了詳細的闡述，對傳統的基於加窗dft的諧波檢測方法的誤差原因及減少誤差的方法進行了分析，並介紹了各種不同的餘弦窗函數，進而簡要分析了幾種常見的頻譜校正方法。分享友人