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	Approximate calculation method of hydrodynamic solution of an array with a large number of truncated cylinders 期刊论文 OAI收割 OCEAN ENGINEERING, 2022, 卷号: 257, 页码: 16 作者: Zeng, Xiaohui; Wang, Guangyuan; Kang, Yuanshun; Xue, Zhen; Yu, FaJun \| 收藏 \| 浏览/下载：52/0 \| 提交时间：2022/08/02 Approximate calculation method Truncated cylinders Added damping coefficients Added mass coefficients
	The approximate calculation of atmospheric path radiance in close range and horizontal direction (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Sensors, Measurement and Intelligent Materials, ICSMIM 2012, December 26, 2012 - December 27, 2012, Guilin, China 作者: Sun Z.; Chen Y.; Zhang Y. 收藏 \| 浏览/下载：33/0 \| 提交时间：2013/03/25 Atmospheric path radiance is the key factor in the accuracy of objective radiation measurement. In the traditional radiation character measurements it is compared with the results of MODTRAN and measurement in experiment. It is revealed that the accuracy of software is 7.8% under the help of the atmospheric observation equipment and the formula is 4.9% MODTRAN and other software likewise which could demonstrate the validity of the pproximate calculation formula in close range and horizontal direction. In this article the indeterminacy rate could be around 10~20% in the process of deducing and experiment it is highly restricts the measurement accuracy of objective radiation. For this reason the validity of the approximate calculation formula in close range and horizontal direction is fully proved it is quite significant to develop the study of measure and calculation in path radiance. The approximate calculation formula for path radiance in close range and horizontal direction is expressed in this article which supply a new method in approximate calculation of path radiance for objective radiation measurement. (2013) Trans Tech Publications Switzerland.
	A new method for comparing Zernike circular polynomials with Zernike annular polynomials in annular pupils (EI CONFERENCE) 会议论文 OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China Jing S.; Dongmei M. 收藏 \| 浏览/下载：27/0 \| 提交时间：2013/03/25 To compare the difference between Zernike annular polynomial and Zernike circular polynomial an approximate mathematic relationship between Zernike annular polynomial coefficients and SEIDEL coefficients is proposed. A new method is applied in comparing experiment. For real interferometric data of annular wave front the SEIDEL aberration calculated in different ways is removed from the original wave front. Residual astigmatism aberration in annular polynomial way is close to zero but defocus and sphere aberration are 0.002709 -0.00182. The residual SEIDEL using annular polynomial is least. Data used in comparison shows that Zernike annular polynomial is more accurate and meaningful for the decomposition of aberrations and the calculation of Seidel aberrations in annular pupil. The calculation in astigmatism aberration is most accurate and those in defocus and sphere aberration are least accurate when the first 9 terms are used in approximate solving SEIDEL. More coefficients are needed to obtain the real SEIDEL. 2010 IEEE.
	The three-dimensional focusing behaviors of the compound x-ray lenses (EI CONFERENCE) 会议论文 OAI收割 Optical Design and Testing II, November 8, 2004 - November 11, 2004, Beijing, United states Le Z.; Liu K.; Liang J.; Zhang M.; Quan B. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 A theoretical method for evaluating the three-dimensional focusing performances of the compound x-rays lenses is presented in the present paper. The relationship between the transverse and axial focusing behaviors is considered and a simple calculation that predicts the transverse and axial focusing behaviors of the compound x-ray lenses is also presented. As an example the three-dimensional focusing performance of a compound x-ray lens with Al material is predicted. The dependences of the three-dimensional focusing performances on the compound lenses' structural parameters are observed for the Al compound x-ray lens. Moreover the approximate tolerances in the setting of the receiving planes are also considered for x-rays of 4.95keV 14.99keV and 29.78keV.