次生波 的英文怎麼說
中文拼音 [cìshēngbō]
次生波
英文
secondary wave-
Device that sends out lethal infrasonic sound wares to cause the internal organs of the human body to vibrate, displacing, distorting and rupturing them, and even resulting in death
發出次聲波來殺傷人的武器。次聲波能引起人體內臟共振，使內臟發生位移和形變，功能損壞，甚至造成人死亡。Effects of infrasound on biological characteristics of osteoblast - like cells
次聲波對成骨樣細胞生物學特性的影響There is great change of negative current component when it happens the line - open fault. it is marked as the occurrence of the fault. and it can be concluded the phase characteristic of negative current in the line. in the transient course, there are plenty of harmonics in the fault line. through the transient analysis, it is drawed that the amplitude of each harmonic in fault phase is greater than other phases. harmonic current in fault line is far greater than other normal lines
發生斷線故障以後，線路中會出現負序電流的突變，可以作為故障啟動判斷的標志，並且通過分析得出了故障時負序基波電流的相位特點。在故障暫態過程中，故障電流中含有大量豐富的諧波成分，各次諧波在故障期間有突變，並且衰減很快。Abstract : temporal properties of the second - ordre process with a chirped incident pulse are theoretically calculated. the chirp influences the irradiance and the pulse shape of the second harmonic wave with large phase mismatch. the phase distortion of all three waves is dependent more strongly on the chirp than on the phase mismatch
文摘:討論了在大相位失諧下，基波為頻率啁啾脈沖的二次諧波產生過程，結果表明選取合適的啁啾參量可以使二次諧波的光強提高，但同時會使其波形和相位發生變化.三波相位的畸變主要取決于入射的基波啁啾脈沖，而與相位匹配的失諧量關系不大And by means of semiclassical theory, the changes of hhg for realistic hydrogen atom in the static electric field is explained
藉助於半經典理論，解釋了在靜電場作用下高次諧波發生變化的機制。Study on second filtering algorithm based on tracing the interfering spectral peaks of radar non - contact life - parameter detection system
基於雷達式非接觸生命參數檢測中跟蹤干擾譜峰的二次濾波演算法研究Carrier frequency leakage less than - 40db can be attained since good agreement of the two diodes antiparalleled in even - harmonic mixer is guaranteed inherently
在簡化載波信號產生電路的同時，利用偶次諧波混頻器固有的本振偶次諧波高抑制度特性，來抑制載波泄漏。On the base of widely investigating and researching, author deems that the conventional reactive power compensation devices used by consumer had many defects with among others : lower response time, remaining residual voltage on the compensation capacitors, and so on. because of existing improper trigging time, it is impossible to realizing balance compensation for 3 - phrase unbalance loads
本文在充分調研的基礎上，認為目前採用的傳統的無功功率補償裝置存在響應速度慢、觸發時刻不合適、補償電容器上有殘壓、不能實行三相平衡補償、對電網產生污染、不能消除負荷本身產生的高次諧波等弊病。Point originally possessed the harmful interference of the frequency s every kind of times. enlarge 1 khz sine wave the hour will produce 2 khz of two times wave with 3 khz of three times wave wave for and much higher time
指原有頻率的各種倍頻的有害干擾。放大1khz正弦波時將會產生2khz的二次諧波和3khz的三次諧波以及許多更高次的諧波。Tangyin substation is an important substation which has two transformer of 120mva, eight 220kv lines and three 110kv lines. tangqian line is a 110kv line specially for traction transformer substation. because traction load is high - power nonlinear and asymmetry. it will produce much harmonic and negatvie sequence current, which have done harm to compensation capacitors of tangyin substation. in recent years, the tang6c capacitor often interrupted and in 2001 july the tang7c capacitor ' s discharge pt exploded
湯陰變電站是豫北一座樞紐變電站，有2臺120mva的主變， 8條220kv線路和3條110kv線路，其中的湯牽線是專為牽引變電站供電的110kv線路。由於電力機車屬于大功率的非線性負荷，且三相不對稱，在其運行過程中必然會產生較大的高次諧波和負序電流。The wave length of infra - sound is quite long : typical infra - sound from the eye of a typhoon has a 4 to 8 second cycle 0. 25 to 0. 125 hz, meaning that its wavelength is a few kilo - metres long
次聲波的波長很長，例如臺臺風眼所產生的次聲振動周期約秒0 . 250 . 125赫茲，波長便可達數公里。In riverbed, rqd is an appropriate index of rock mass structure classification. because the weathering agent causes the change of integrity and structure of rock mass, the relationship between rock mass structure indexes and weathering zoning is discussed through wave velocity ratio
風化營力的作用使巖體中次生裂隙增多從而導致巖體完整性、巖體結構的變化，本文以波速比為紐帶，研究了兩岸壩肩部位巖體結構量化指標與風化分帶的關系。When zero sequence or high secondary harmonic current component appear in the circuit, the total current in the shield is zero, no electromagnetic interference with outside
當線路出現零序或高次諧波電流分量時，屏蔽層內電流總和為零，不對外界產生電磁干擾。In accord with the state standard about harmonic. the harmonic permission value of tangqian line is calculated. some measurement data are shown and analyzed, and some main conclusion is drawed that the 7th harmonic voltages of tangqian line is near to the permission value, total harmonic voltage distortion ratio has oversteped the permission value. the 3th harmonic, the 5th harmonic, the 7th harmonic and the 9th harmonic current from tangqian line all overstep the permission, the largest 5th harmonic current ratio in tangsc reaches 44 %, the 7th harmonic and the 9th harmonic current in tang7c and tangsc is large maybe because the harmonic current is magnified. this paper studies the model of each element in tang yin substation
根據有關公用電網諧波的國家標準，計算出湯牽線注入湯陰變電站的諧波電流允許值，從實測數據可以得出一些重要結論：湯牽線7次諧波電壓含有率的最大值接近國標中的限值，湯牽線的諧波電壓總畸變率的最大值已超標；湯牽線注入電網的3 、 5 、 7 、 9次諧波電流都超標；湯6c電容器的5次諧波電流含有率較高，最高達到44 ；湯7c和湯8c電容摘要器的7次和9次諧波電流含有率偏高，原因可能是發生了諧波電流放大現象。The widely applications of nonlinear instruments have produced many high order harmonics, they are flowing into the power network and greatly influence the quality of electric power. and the frequency is n ' t constant but changed around 50hz
電網中非線性設備的使用日益增多，所產生的高次諧波電流大量注入電力線路中，使得電網電壓、電流波形發生畸變，同時電網頻率並不是固定不變的，而是在50hz附近波動。Through theoretic reckoning and simulating analyzing, several control strategies for shunt apf were compared and chose ip - iq arithmetic of the instantaneous reactive power theory control strategy as the right scheme to produce the instructing current. based on it, some new control arithmetic was subjoined to suppress the resonance in system and balance the dc side capacitor voltage. two topologies of main circuit were compared and chose the three - phase voltage - source converter with a split - capacitor as its main circuit structure
通過理論計算和模擬分析，比較了並聯型apf的幾種控制策略的優點和缺點，從中選擇瞬時無功理論控制策略i _ p - i _ q計算方式為指令電流產生的演算法，並在此基礎上增加了抑制系統諧振和平衡直流側電容電壓的控制；比較了並聯型apf主電路的兩種常見形式，從中選擇了三相電壓型變流器的主電路形式；算出適合該apf的直流側電容和出線電感的參數；設計出能有效消除apf產生的高次諧波的高通濾波器。Two generating methods of compensation current are also proposed for the purpose of eliminating detuning or limiting harmonic voltage contents, in which the compensation current is the weighted superposition of filter harmonic currents or voltages and the regulating factor
針對消除失諧或限制諧波電壓含量的不同控制目標，提出了諧波磁通補償電流的兩種生成方法，補償電流分別是濾波器電流或母線電壓中各次諧波分量與調節系數的加權合成。High - order harmonic generation by relativistic lasers in a maxwellian distributed plasma
分佈等離子體中產生的高次諧波From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling
現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。Because the harmonics in tangyin substation are primarily from electric traction loads, this paper gives the structures of several main locomotive models and general harmonics they produce. the harmonics produced by electric locomotive have a characteristic that their range and phase are both dispersive. this paper also analyzes the impedance - matching balance transformer ' s structure and harmonics injected into the power system at its primary side, and sums up the characteristics of the harmonics from electric traction loads in the tangyin traction substation
鑒于湯陰變電站的諧波主要來自電力牽引負荷，本文列舉了電力機車幾種主要車型的結構以及它們產生諧波的概況，得出了電力機車的各次諧波電流幅值和相角具有較大分散性的特點。針對湯陰牽引變電站的牽引變壓器，分析了阻抗匹配平衡變壓器的結構及其高壓側注入電網的諧波，推導了有關計算公式。通過理論分析並結合湯牽線的實測諧波數據，歸納了電力牽引負荷注入湯陰變電站的諧波的特點。分享友人