symmetrical wave 中文意思是什麼
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In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Then, this thesis presents an algorithn of 2 - terminal quantity fault location based on synchronous gps sampling. this algorithm conducts fault location with only the 3 - phase fundemental wave voltage and current phasors of the 2 terminals of transmission lines and apples to lines of both symmetrical and asymmetrical parameters, irrelerant to the impedence, fault types and transitional resistance of the 2 terminals of lines
然後，本文提出了一種基於gps同步采樣的雙端量故障測距演算法。該演算法僅利用輸電線路兩端的三相基波電壓、電流分量來進行故障定位，不受線路兩端系統阻抗、故障類型、過渡電阻等因素的影響，對參數對稱線路和非對稱線路均適用。 -
Spin - wave resonance in a symmetrical ferromagnetic bilayer films
兩層對稱鐵磁薄膜中的自旋波共振 -
( 2 ) based on the wave equation in the acoustic fluid space and the theory of thin - wall structure, the non - symmetrical coupled structure - acoustic dynamic equation without damping is studied. the non - symmetric system of the finite element model for coupled structure - acoustic response is solved by the conjugate subspace iteration method
由聲空間波動方程和薄板理論出發，對聲場?結構耦合系統的模態分析提出了有限元數值方法，採用共扼子空間迭代法對非對稱特徵方程進行處理，採用靜凝聚法消除質量矩陣的奇異性。 -
Then the hamiltonian of the io algebraic model was diagonalized on the symmetrical bases, and the energy spectra of benzene and the corresponding wave function are obtained
在對稱基上將io代數模型中的哈密頓量對角化，得到苯分子振子數高達10的能譜及相應的波函數。 -
Four - dimensional generalized symmetrical formalism in classical physics and quantum mechanics and mechanical wave theory
經典物理和量子力學中的四維廣義對稱形式和力學波動論 -
The dissolution and deposition of stainless steel electrode under non - symmetrical square wave electric field were investigated by using atomic absorption spectroscopy ( aas ) and electrochemical measurement
摘要採用原子吸收光譜結合電化學技術研究了交變電場對304型不銹鋼電極表面的溶解和沉積的影響。 -
On the basis of three - dimensional axially symmetrical soil model and taking consideration of vertical wave effect of soil layer, the interaction between visco - elastic layered soil and an integral pile or a multi - defective pile with arbitrary bottom boundaries and its engineering application is systematically studied in this dissertation
本文從三維軸對稱土模型出發，較系統地對考慮樁周土豎向波動效應、任意樁底支承邊界條件下、成層粘彈性土中完整樁及變阻抗樁與土縱向耦合振動理論及其工程應用進行了研究。 -
Based on the optical theory of planar wave - guide, this paper analyzes the transformation of pattern from symmetrical wave - guide to asymmetrical wave - guide. and the result shows that some patterns will radiate from the wave - guide when applying an external force on the sensor
論文以平面光波導的幾何光學理論為基礎，分析了光波導從（ n0 - n1 - n0 ）對稱波導向（ n2 - n1 - n0 ）非對稱波導轉變中導波模式所發生的變化。 -
The pseudorandom codes have a good autocorrelation of double - values. in recent years, to solve the problems of anti - interference and the ambiguity of range and velocity, a lot of countries do much research to change the waveform of radar signal. the most important improve is to use symmetrical pulses to interrupt frequency modulated continuous wave ( fmpcw )
早期的fmicw採用偽碼序列截斷，偽隨機碼具有良好的雙值自相關特性，其中最常用的是m序列截斷的fmicw 。近年來，為了解決抗干擾和測距、測速模糊問題，許多國家已對雷達信號波形的改進進行了研究。
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