first-order transformation 中文意思是什麼

first-order transformation 解釋
第一級相轉變
  • first : adj 1 最初的，最早的。2 最上等的，第一流的。3 基本的，概要的。4 高音（調）的。n 1 最初，第一；第...
  • order : n 1 次序，順序；整齊；（社會）秩序，治安；狀況，常態；健康狀態；條理；會場秩序；議事程序，日程；...
  • transformation : n 轉變，變化；變形；【生物學】（尤指昆蟲的）轉化，變態，改造，改革；變質；【數學】變換；【電學】...
  1. Because of the presence of the first - order sea echoes with dominant amplitude, the doppler resolution technique which based on the range - velocity transformation is needed to extract the targets information in hf radar

    高頻雷達工作在擁擠的短波波段，由於絕對占優的一階海浪回波的存在，必須採用基於距離?速度譜變換的多普勒頻率分辨技術來處理雜波，以提取目標信息。
  2. ( 2 ) based on the propagation equation of fgbs passing through unapertured paraxial abcd optical systems, the similar transformation conditions are obtained for the first time, which is expressed as that two fgbs with the same beam order have similar intensity distributions at the two positions of equal generalized fresnel number when they propagate through two ajb, cjdi ( i = l, 2 ) systems. furthermore, a comparison between a fob and a sgb of the same beam a ^ - factor but different waist widths is performed for the first time

    （ 2 ）通過對作為整體的平頂高斯光束在無光闌限制近軸abcd光學系統中傳輸公式的分析，首次得到了平頂高斯光束的相似變換條件，即階數相同的平頂高斯光束在傳輸矩陣為a _ ib _ ic _ id _ i （ i = 1 ， 2 ）的兩個光學系統中傳輸時，在菲涅爾數相等的兩個面上具有相似的光強分佈。
  3. In order to guide the university students to design the reasonable employment target and to complete the role transformation from university students to social common workers as soon as possible, and to make students become the main force in the first social production, the key is to make university students foster the consciousness of needs, quality and adaptability to the society

    摘要大學生就業指導工作要引導大學生設計合理的就業目標，使其盡快完成從在校生到社會普通勞動者的角色轉換，成為發展第一生產力的生力軍，其關鍵在於引導大學生樹立需求意識、質量意識和適應社會的意識，正確處理就業中的各種矛盾。
  4. In the proposed technique the bemf waveform of bldcm need to be measured in advance at first, through computer simulation and frame transformation, the optimum q - axis current command is achieved. in order to minimize the torque ripple, the d and 0 - axis current command should be zero. furthermore, through reference frame transformation from dqo - axis to abc - axis, we can get the optimum current command in static abc reference frame

    在這種控制方法中首先測量出電機的實際反電動勢波形，然後通過計算機擬合和坐標變換，求得產生恆定電磁轉矩所需的q軸電流，令i _ d ~ * = i _ 0 ~ * = 0 ，通過坐標變換，得到三相靜止坐標系a - b - c下的參考電流i _ a ~ * ， i _ b ~ * ， i _ c ~ * ，利用電流滯環控制來產生pwm信號，由於這種控制方法中電流不會突變，從而可以較好的抑制轉矩脈動。
  5. Abstract : in order to solve the double parameters enveloped in the geartooth flank generating, the complicated double parameter envelope is simplified to the generating process between work - piece and imaginary crown generating gear by means of mathematical transformation. the equation of the imaginary crown generating surface and the partial derivatives are deduced, so the differential geometric parameters of the generating surface can be obtained. by analyzing the generating motion between the imaginary crown generating gear and the work - piece, all the first to third order geometric parameters of the generated tooth flank at any given point can be calculated

    文摘:為了解決直接求解展成法加工中存在的復雜雙參數包絡問題時的困難，提出通過數學變換，將此包絡問題轉化為假想平面產形輪與工件之間的展成問題來進行研究.推導了假想產形面的方程和各階偏導矢，於是可獲得產形面的微分幾何參數.通過分析假想平面產形輪與工件之間的展成運動，即可得到被展成齒面上任意指定點的全部一至三階微分幾何參數
  6. Based on some problems about random draft, energy conservation and ensemble efficiency of hydraulic - projects utilization, by the way of full - scale test, the application of frequency changer in agricultural water saving have been studied. it is the first time in china for the imagination that frequency changer has been used in tube - well irrigation in order to make the water pump keep constant transformation

    本項目針對目前農業節水灌溉工程中存在的隨機取水、節能問題和水利工程資源的綜合利用效率提高問題，以實地工程應用試驗為基礎，對變頻調速裝置在農業節水灌溉工程中的應用進行了研究。
  7. The solving theorem of first order and third power differential equation under transformation of polar coordinates and its application

    一階三次微分方程在極坐標變換下的求解定理及應用
  8. In the process first does the literature research to the ancient egyptian spinning and weaving evolution, in order to help carries on the transformation chart grain decoration application in the clothing, tests mural of and research the archaeology culture including the collection ancient egypt, the affiliation expresses the modem clothing and fusion the wall painting grain by the materials behavior, creates has the popular clothing

    過程中先對古埃及紡織的演變做文獻研究，以利進行轉換圖紋裝飾應用在服裝中，實驗包括搜集古埃及之壁畫及考古文化之研究，藉由材料特性表達出現代服飾及壁畫圖紋之融合，創造出具有流行之服裝。
  9. In order to resolve the nonlinear distortion occurring in the course of image acquiring, first we apply affme transformation to adjust image, then recovery image by means of linear interleration algorithms

    為了解決圖像掃描過程中出現的非線性畸變，首先運用仿射變換校正圖像象素位置發生的非線性移位，然後採用線性插值演算法進行圖像恢復。
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