bessel method 中文意思是什麼
bessel method
解釋
白塞爾法-
5. without making the paraxial approximation, a detailed study on the propagation of ultrashort pulsed bessel beams in linear normal and anomalous dispersive media has been performed using the method of fourier transform
未作近軸近似的條件下，用傅立葉積分變換法詳細研究了超短脈沖貝塞爾光束在正、負色散介質中的傳輸特性。 -
In chapter two, the principle of absolutely calibrating is presented. two kinds of interference measurement methods are introduced : counting of frequency ratio method and bessel function method, and the accuracy of the two methods are analyzed
第二章闡釋了激光干涉測振原理，進而介紹了實現激光干涉測振的兩種方法? ?頻比計數法和貝塞爾函數法，並對兩種方法的精度進行了分析。 -
We propose a chaos - based generation of the random ppm - ps signals, design and implement a generator of the ppm - ps signals. we introduce an if sampling technique and simulate the performances of digital demodulation techniques of using hilbert filters, sine filters, bessel filters and poly - phase filters. the poly - phase filtering method can achieve the higher mirror - frequency rejection ratio by using the low order filters
介紹了中頻采樣技術，並對希爾伯特濾波法、辛格內插函數修正、貝賽爾函數插值法及多相濾波法等數字解調演算法進行了計算機模擬和性能比較，指出多相濾波法能以較低的階數實現較高的鏡頻抑制比。 -
7. propagation properties of flattened gaussian, bessel - super - gaussian and laguerre - gaussian beams are studied by using the collins formula in the frequency - domain and hankel transform. the results are compared with those by means of the collins formula in the space - domain, and the advantage of the method is discussed
用頻域collins公式和hankel變換研究了平頂高斯光束、貝塞耳?超高斯光束以及拉蓋爾?高斯光束的傳輸特性，並與空域collins公式計算結果作了比較，同時討論了該方法的優點。 -
The results of the axial and transversal intensity distributions of gaussian beams and 0 - order bessel - gaussian beams show that the results by the optimized laguerre - gaussian truncated series are in good agreement with those by the fresnel diffraction integral method if the integration plane is not close to the aperture
對高斯光束和零階貝塞爾高斯光束的軸向和橫向光強分佈的計算結果表明：當積分面不是很靠近光闌時，用參數最佳化選取的拉蓋爾高斯截斷級數法與用直接數值積分所得結果符合很好。
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