換算因數 的英文怎麼說
中文拼音 [huànsuànyīnshǔ]
換算因數
英文
conversion factor- 換 : 動詞1. (給人東西同時從他那裡取得別的東西) exchange; barter; trade 2. (變換; 更換) change 3. (兌換) exchange; cash
- 算 : Ⅰ動詞1 (計算數目) calculate; reckon; compute; figure 2 (計算進去) include; count 3 (謀劃;計...
- 因 : Ⅰ動詞[書面語] (沿襲) follow; carry on Ⅱ介詞1 [書面語] (憑借; 根據) on the basis of; in accord...
- 數 : 數副詞(屢次) frequently; repeatedly
- 換算 : [數學] matrixing; scaler; conversion; convert; translation換算表 conversion table; equivalent tab...
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Since pixel - level contrapose pixel coordinate, trigonometric function must be used to translate polar coordinates to pixel coordinate when the curve is described by polar coordinate. so research is very little on algorithms for generating this sort of curve by now
由於逐點是針對象素坐標系而言,而對極坐標系下描述的曲線,在轉換到象素坐標系時要用到三角函數運算,因此目前很少提到對極坐標曲線生成演算法的研究。Monitor apparatus can measure valid value of three phase voltage and current, power factor, three phase disequilibrium, instant flecker of short time and harmonic without twenty, degree and harmonic distortion total. the paper are laid on the following. ( 1 ) master plan and function of circuit, ( 2 ) hardware design including circuit and principle of a / d conversion, phase lock, liquid crystal display and keystroke and so on, ( 3 ) design of system software including digital filtering, fft, a / d conversion and monitor interface of pc, ( 4 ) system test
監測儀能夠完成包括三相電壓、三相電流的有效值、功率因數、三相不平衡、電壓短期閃變、以及20次內的諧波、諧波相位、諧波失真總量等的測量。論文重點介紹了以下幾部分: ( 1 )電路的總體設計和功能; ( 2 )硬體設計,包括a d轉換、鎖相環、液晶顯示和按鍵輸入等原理和電路。 ( 3 )系統軟體設計,包括a d轉換、 fft 、數字濾波等程序的原理和演算法以及上位機監控界面的設計; ( 4 )系統測試。At present, the typic harmful current detection methods are the fast fourier transform algorithm in frequency domain and methods based on the instantaneous reactive power theory, these methods all require some transform and quick, real - time calculating, so high precision analog multipliers or high speed dsp chip with fast a / d are needed, this results in complex circuit and high cost , which have restricted the development of apf
目前畸變電流檢測常用的方法有頻域法的fft和基於瞬時無功理論的畸變電流檢測法。這些方法均有一定的變換,需要快速、實時運算,因此必須使用高速的數字微處理器和高性能a / d轉換器,這必將大大提高系統成本,使得電路結構復雜,在一定程度上限制了有源濾波器的發展。A quasi - counterflow plate heat exchanger with hexagonal dividing plates is proposed for indirect heat exchange and evaporative cooling. numerical simulation is used to analyze three - dimensional flow and heat transfer processes
採用三維流動與換熱的數值計算方法對換熱器內傳熱過程的影響因素和機理進行了模擬研究。A novel communication receiver which uses lapped transform ( lt ) incorporating modified median filter ( mmf ) algorithm is designed for narrow - band interference excision. the lt domain mmf algorithm takes full advantages of the direct sequence spread spectrum signal, as well as the characteristics of lt, performing the transform domain filtering twice. the first filtering locates the position of interference and mitigates most of them. the second filtering is performed in a small neighborhood of the located interference. so lt domain mmf algorithm can completely mitigate the interference without distorting the desired signal. simulation results demonstrate the improved ber performance and increased robustness of our receiver
本文採用改進的重疊變換域中值濾波演算法進行變換域抗干擾處理.該演算法既考慮到直接序列擴頻信號的特點,同時又利用重疊變換的特性對變換域系數進行了二次濾波.該演算法節省處理時間,並且不需要有關干擾的先驗知識,系統性能不會隨干擾頻率變化而變化,因而是一種很穩健的處理方法These comments should also not be changed because the business intelligence wizard uses this metadata when displaying existing currency conversions
您也不應當更改這些注釋,因為在顯示現有的貨幣換算時,商業智能向導使用此元數據。Based on the analysis and calculation of ship resistance, according to the main factors influencing the resistance, such as sailing speed, water depth and ship draft ratio, and coefficient of sectional form, the deepwater, shallow water and restricted channel are defined by the coefficient factor
摘要通過對船舶阻力的分析和計算,根據影響阻力的主要因素,航速、水深與船吃水比、斷面系數,由換算系數來界定深水、淺水與限制性航道。An empirical formula is used to convert the signal intensity into rainfall rate. thus, the rainfall rate presented here is only an estimate
由於是利用了一經驗公式將信號的強弱換算為降雨率,因此圖像顯示的降雨率僅為一估算數值。The new series has year 2000 as the base year. in the new series, indices for periods prior to 2000 are obtained by re - scaling the previously published series, which has 1990 as the base year, using a conversion factor derived from the levels of the old and new series in the overlapping period of 2000
二零零零年以前的新系列指數是將以往發表的舊系列指數(以一九九零年為基期)按比例換算得來,所用的換算因子是根據新舊系列在二零零零年重疊期間的數值而計算的。On the basis of utilizing geometric conversion and modification principle of spur and helical gears, the mathematical model for geometric parameters and modification of overlapping coefficients of gear was established, and the calculation method of sliding frictional coefficients under elasto - hydrodynamic lubrication state was introduced, thus let the calculation method of meshing efficiency of gears be more coinciding with the practical application
在運用直、斜齒輪幾何換算和變位原理的基礎上,建立齒輪的幾何參數和重迭系數修正的數學模型,介紹了彈流潤清狀態滑動摩擦因數的計算方法,從而使齒輪嚙合效率計算方法與實際應用更吻合。Atomic mass conversion factor
原子質量換算因數Conversion factors for units
單位的換算因數Credit conversion factor
信貸換算因數This paper, regarding the asphalt pavement in the zhoukou region as the study object, according to the prevalent norms ( specifications for design of highway asphalt pavement ), with the beginning of the pavement performance and the transportation investigation, totally and systematically analyzes the traffic parameters and the destroying reason of pavement at the early stage in the point of fatigue property and limit strength, gives the concepts and methods of the growth rate of equivalent axle load action time, seasonal modification factor and overload factor, proposes the method of axle load conversion on the condition of heavy loading. on this basis, it proposes the design method adapting to asphalt pavement construction, explains the steps of thickness computation of construction with the combination of engineering example, finally verifies thedesign method in the paper by test road. theory and practice both prove that the reasonability of pavement structure style and the reliability of design method in the paper can adapt to the present heavy loading and overloading traffic conditions, have highly theoretical and practical value
本文以周口地區瀝青路面為研究對象,以現行《公路瀝青路面設計規范》為依據,從路面使用性能和交通特徵的調查入手,從疲勞特性和極限強度出發分析了路面早期破損的原因,全面系統地進行了交通參數的分析,提出了當量軸次增長率、季節修正系數和超載系數的概念和方法,並提出了重載交通的軸載換算方法。在此基礎上,針對超載、重載交通從結構組合設計、結構厚度計算(包括疲勞強度標準和極限強度標準)等方面提出了適宜的瀝青路面結構設計方法,並結合工程實測,說明了結構層厚度計算的具體步驟,最後通過試驗路驗證本文提出的設計方法。理論與實踐均表明,本文提出的路面結構型式合理、設計方法可靠,能適應目前重載、超載交通的狀況,具有較高理論與實用價值。First, variable speed constant frequency wind energy convertion theory is described in this paper, then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid. then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability. simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established. to convert the variable frequency electricity into utility grid, back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy. then simulation is implemented to test the control strategy. in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數學模型,針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制,通過變流器交-直-交的變換,將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電,通過pwm調治能使其輸出功率因數為一,並且該控制系統功率因數為可調,能在特殊情況下同電網交換一定的無功功率,並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬,取得了良好的模擬效果。在風力發電系統中,採用先進的最大功率俘獲演算法,能有效的從風中獲得最大的能量。The general transfer functions of pwm converter are developed and the small - signal transfer functions controlled by the duty cycle are given using matlab. the voltage adjuster and the current regulator of the control circuit are designed. the isolated cuk converter is analyzed and the features and the description of the uc3854 are presented in detail
論文分析了帶隔離變壓器的cuk變換電路,介紹了平均電流型功率因數校正晶元uc3854的結構、功能;根據uc3854的具體特點與要求,以設計一個具體、實用的帶pfc功能的開關電源為例,設計、計算了主電路電感l1 、 l2 、 c1 、 c2 、隔離變壓器以及電壓、電流調節器電路的參數及要求。It involves not only the detection of signal frequency, signal phase and power factor but also calculation and control of phase. the method of calculating phase is based on fast fourier transform algorithm ( fft ). it is used to calculate signal frequency, signal phase, power factor and the phase on / off time according to sampling instantaneous value of voltage and current
本文主要提出了採用信號處理技術(快速傅里葉變換fft ) ,根據電壓、電流采樣的瞬時值,計算信號頻率、信號相位、功率因數、分合閘相角的選相控制方法,並介紹了最終控制分合閘的原理與實現方法Zh - transformed data are reorganised into binary bitmaps and coded with cae encoder, now cae encoder can predict the next bit more precisely according to the bits have been coded, so coding efficiency of cae encoder is improved
經過zh變換,算術編碼器可以利用已經編碼的數據更準確的預測下一位要編碼的數據,因此算術編碼器的效率得到了提高。On one hand, the problem of " big horse pulls little wagon " is resolved and the working efficiency of motor is improved by optimizing way to control the stator ' s voltage ; on the other hand, an energy automatic processing system of " electric motor generates electricity " is developed, in which, the energy of the feedback of motor generating electricity is processed duly and correctly through real - time switch control of the generating electricity absorbing energy cell and is used at wellhead instead of returning power net
本課題運用新型電力電子技術和計算機控制技術研究開發了一種電機功率因數自調整及節能控制系統,一方面通過對定子電壓的尋優控制,解決了「大馬拉小車」問題,改善了電機的工作效率;另一方面開發了一種電機「倒發電」能量自動處理系統,通過倒發電吸收單元的實時切換控制,將倒發電反饋的能量及時準確地進行處理,使其在井口利用不返回電網。Scale, decimal formatting, currency - symbol placement, and disambiguation are all factors in proper currency display
換算、小數格式、貨幣符號位置和消除二義性都是影響貨幣正確顯示的因素。分享友人