餘弦公式 的英文怎麼說
中文拼音 [yúxiángōngshì]
餘弦公式
英文
the cosine formula-
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。Experiments are performed and results show : 1 the popular retrieval models the okapi s bm25 model and the smart s vector space model with length normalization do not perform well for document similarity search ; 2 the proposed model based on texttiling is effective and outperforms other models, including the cosine measure ; 3 the methods for the three components in the proposed model are validated to be appropriately employed
我們通過實驗驗證了以下三點： 1 trec中的常用信息檢索模型不能很好地解決文檔相似搜索2我們提出的基於texttiling技術的模型是有效的，性能優于其他模型3我們提出的模型中所採用的方法是有效的，包括利用texttiling技術進行文本子主題分割，利用餘弦公式來計算文本塊之間的相似度，以及利用最優匹配方法來求解文檔之間的總體相似度。Based on the theories described above, calculation formula of general dimension of least square measure and multi - fractal fault diagnosis and analysis system have been established with borland c + + builder 5. 0, and checked by pure sinusoidal and cosine signal and sinusoidal signal with noise, and verified by the examples
基於上述原理，建立了最小二乘法的廣義維數計算公式，用borlandc + + builder5 . 0編制了以廣義維數計算分析為基礎的多重分形故障診斷系統，並對標準的正弦信號、餘弦信號及帶有噪聲的正弦信號進行了驗證。On the base of above it, this paper discuss the synthesis of optimum distributed arrays by nonuniform spacing in the sense of dolph - chebyshev. having derived the equations of optimum element distribution, we analyze the exponentially spaced array, which are optimum when the elements are isotropic and equally weighted, and the array by general raised cosine function. the formulate for estimating the sidelobe envelope, beamwidth of the array pattern and clean region width are obtained
推導了最佳陣元分佈方程，分別對陣元無方向性和等加權時的最佳分散式陣列? ?指數間隔陣列和採用廣義升餘弦加權的最佳分散式陣列進行了分析，推導了天線方向圖旁瓣包絡、波束寬度，干凈掃描區寬度的估計公式，給出了近軸旁瓣電平與陣列參數的關系。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。2 ) for the ability of searching, a formula of adaptive crossover rate decreasing with the increasing of genetic generation
2 ）設計出餘弦下降的自適應交叉率公式以改善遺傳演算法搜索能力。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。Starting from the collins formula, a recurrence equation of hermite - cosine - gaussian ( hcg ) beams propagating through a paraxial abcd system with a hard - edged aperture is derived, from which the analytical propagation expressions for apertured hcg beams of any order can be derived by using the recursive algorithm
從collins公式出發，推導出了厄米?餘弦?高斯光束通過有硬邊光闌近軸abcd光學系統傳輸的遞推公式。由遞推公式，藉助迭代演算法，得出受光闌限制的任意階厄米?餘弦?高斯光束的解析傳輸公式。Solving the helen theorem with the cosine theorem
用餘弦定理證明海倫公式The laser scatter ' s characteristics of the objects are computed based on the lambert law of cosines, while the scatter ' s characteristics of sun light and moon light are calculated separately using the illuminance of sun light and moon light on the ground. the radiation characteristics of the objects are computed using the plank law
由朗伯餘弦定律計算了目標對激光的散射特性，根據太陽光和滿月月光在地面的照度分別計算了目標對太陽光和月光的散射特性，根據普朗克公式計算了目標自身的熱輻射特性。分享友人