sine and cosine 中文意思是什麼

sine and cosine 解釋
正弦和餘弦
  • sine : n 【數學】正弦〈略 sin〉。 sine curve 正弦曲線。 sine wave 正弦波。〈拉丁語〉 無。 sine die 無限...
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • cosine : n. 【數學】餘弦。
  1. We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.

    用復數算術推導了正弦，餘弦的加法公式。
  2. This paper introduces the calculation of the loads of different waves and the combination of sine wave and cosine wave. furthermore, stressing on discussing the corresponding problems of the fem of the whole structure and putting forward the basic principles of building a fleet. taking a fleet for example, the paper discusses the whole response of the fleet and the local response of it according to different load cases

    本文介紹了船舶的波浪載荷計算及按動態載荷法進行載荷分量組合，而且研究了結構有限元模型的有關問題，給出了結構的模型化原則；本文以一條051艦為例，討論了不同的工況下整船艦艇結構應力的響應以及局部結構的響應。
  3. This paper include the following parts. firstly the sine exciting - voltage is guaranteed by direct digital synthesize technology ; secondly the digital output of cos ( 9 ) and sin ( 9 ) are generated by microcontroller ; thirdly the two voltage signals which are the product of the two former signals gained by the multiplying d / a converter, being filtered and amplified, have constant frequency, and one amplitude has sine function relationship of with the input angle, and the other amplitude has cosine function relationship of with the input angle ; finally the two signals are acquired and analyzed by relative instrument and software

    主要由以下幾部分組成：用數字頻率合成技術（ dds ）產生正弦激勵電壓信號u _ msin （ t ） ；用單片機產生幅度的數字量輸出sin （ ）和cos （ ） ；用乘法型d a轉換器實現激勵電壓和幅度的乘積，並通過濾波器和功放后即得到頻率固定，幅值隨輸入角成正餘弦變化的電壓信號；最後用數據採集卡採集輸出信號，顯示波形並進行頻譜分析。
  4. This paper develops iterative formula of sine and cosine function in document [ 40 ], and presents new pixel - level algorithms for generating archimedes and involute curves which are widely used in engineering

    本文推廣了文獻[ 40 ]中正弦、餘弦函數的遞推公式，對工程繪圖中常用的阿基米德曲線和漸開線設計了新的逐點生成演算法。
  5. The regional spectral model component is a primitive equation model on a stereographic projection and uses sine - cosine series as horizontal basis functions. the regional component predicts deviations from the forecasting of the global morjel component

    區域部分的預報偏差來自全球模式部分的預報，在區域范圍內，半隱式時間格式、時間濾波、初始化和水平擴散的應用都與偏差有關。
  6. It builds a relative coordinates based on the jumping - off point of circular interpolation as its origin, caculates the sine and cosine of the angle formed by x axis and the line which connects the origin and the centre of the circle, then gets the coordinates of the centre in the relative coordinates, and enduces a uniform fomula, which is easy to program in computer

    摘要用圓弧插補起點作為相對坐標系原點，連接圓弧起點和圓心，求出該連接線和相對坐標x軸的夾角的正餘弦值，由此解出圓心在相對坐標系的坐標，並得到一個統一的計算公式，易於計算機編程實現。
  7. The main module of sensorless pmsm vector control such as voltage sensing, current sensing, smo rotor position estimation, speed calculation, generation of sine and cosine, vector coordinate transformation, pi regulators, svpwm vector modulation are all accomplished in the pwm interrupt service routines

    永磁同步電機無位置傳感器矢量控制的主要模塊如電壓采樣、電流采樣、滑模轉子位置估算、速度計算、正餘弦值生成、矢量坐標變換、比例積分調節器、空間電壓矢量脈寬調制等都是在pwm中斷服務子程序中完成。
  8. Secondly, the main stuctures of the software and hardware parts of the control system are introduced. principles and realization of the main functional blocks of these two parts are illuminated. on the hardware of the system, parts of control circuit and the design and debugging of peripheral circuits are discussed thoroughly. based on the hardware circuit, the software is programmed with assembly language. dual close loop vector control weth feedback of speed and current are realized. the flow charts of main programme and pwm interrupt service routines are given. the important control strategies of vector control pmsm such as current sensint and scaling, speed sensing and scaling, bector co - ordinate transformation, generation of sine and cosine, pi regulators, svpwm vector modulation and so on are all accomplished in the pwm interrupt sevice routines. in order to unite all the variables in the programme, scaling is used

    硬體方面主要論述了控制電路各部分及外圍輔助電路的設計和調試。在硬體的基礎上，軟體採用匯編語言編程，實現了轉速和電流雙閉環矢量控制。給出了系統主程序和pwm下溢中斷處理程序流程圖， pmsm矢量控制的主要控制策略如電流采樣與定標、速度采樣與定標、矢量坐標變換、 sin和cos值生成、 pi調節、 svpwm波形生成等都是在pwm下溢中斷服務子程序中完成的。
  9. Thirdly, similarity matrix, dissimilarity matrix or similarity table are established based on the n - strong peaks, the overlap rate of common peaks and the cosine / sine of vectors " angle which are derived from the fingerprint chromatograms of samples. and based on these data model, clustering research has been done by k - means algorithm, biggest tree in fuzzy clustering and improved cobweb algorithm, where different results have been gained. by comparing, cobweb algorithm is the best

    本次研究利用n強峰、共有峰的重疊率和向量夾角正餘弦值對樣品色譜指紋圖譜分別建立了相似度矩陣、相異性矩陣或相似度表，以這些數據模型為基礎，分別用了k -平均、模糊聚類的最大樹法和改進的cobweb法進行了聚類研究，得到了不同的效果。
  10. Design of the sine and cosine precision reference of high precision excitation power supply with closed loop control

    高精度閉環激磁電源正餘弦精密基準的設計
  11. The type of the base function of wavelet analysis is not single, while the ft has only the sine ( or cosine ) function or exponential function. wavelet transformation has the character of multi - resolution analysis. wavelet transformation can analyze the signal in any precision ( resolution ) at any part of time and frequency according to the different translation factors and dilatation factors

    小波變換具有多解析度分析的性質，對應于不同的伸縮因子和位移因子，小波變換能對信號的任何時間（空間）段、任何頻率段進行任何精度（解析度）的分析，在非平穩信號（包括瞬間信號）的分析中具有很大的優越性，分析時，在信號的低頻部分具有較高的頻率解析度和較低的時間解析度，在高頻部分則具有較高的時間解析度和較低的頻率解析度，被譽為「數學顯微鏡」 。
  12. Firstly, making out the walking poses and tracks of the robot, according to the study on the humans ’ gait and the sine and cosine curves are used to program its center - of - gravity track and its feet - lifting track. secondly, the kinematics model is established, and according to the constraint and the programmed tracks, the kinematics equations of each walking stages are available. then find the solutions of each equation and get the motion curves of its joints, which are also the motion curves of the mini - servomotor

    首先，結合對人類行走步態的研究，規劃機器人行走姿態及軌跡;在此基礎上建立並求解運動學方程，獲得機器人行走時各關節的轉角曲線;最後，針對前向運動與側向運動之間的耦合，對求得的運動曲線進行修正，使機器人在保證穩定的前提下，動作更加流暢。
  13. Resolving - transformers is a kind of component that converts the rotor corners to electrical signals, one has sine functional relationship with the rotor - comers, while the other has cosine ones, and this component has been widely used in many fields such as automatic controls, aviation and firepower fields to implement the information transmission of shaft - angle between systems

    正餘弦旋轉變壓器是一種將轉子轉角變換成與之成正餘弦函數關系的電信號的元件，被廣泛應用於自動控制、航空、火力控制等領域，以實現系統之間軸角信息的傳輸功能。
  14. On a group of identity of sine and cosine function

    餘弦函數的一組恆等式
  15. A high precision direct integration method to solve sine and cosine matrix functions

    正餘弦矩陣函數的精細積分演算法
  16. Static members are often used to represent data or calculations that do not change in response to object state ; for instance, a math library might contain static methods for calculating sine and cosine

    靜態成員通常用於表示不會隨對象狀態而變化的數據或計算；例如，數學庫可能包含用於計算正弦和餘弦的靜態方法。
  17. New proofs of n - dimensional sine theorem and cosine theorem

    維正弦定理和餘弦定理的新作用
  18. New proofs of the n - dimensional sine theorem and cosine theorem

    維正弦定理和餘弦定理的新證明
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