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光电效应实验及理论解释,为量子理论的建立奠定了基础,在光电效应伏安特性实验中,如何有效减少实验影响因素,提高测量结果的精确度,成为光电效应伏安特性实验改进的一个关键点。本从光电效应实验测量的伏安曲线出发,分析理论与实验结果上的差异,提出了影响实验结果的因素以及相应的实验操作办法,为光电效应伏安特性实验的改进,获得更加精确的实验数据以及光电效应实验的应用奠定了基础。 相似文献
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给出了阻尼振动实验中测量圆板阻力的结果并提出了一种改进的实验方法,通过实验与粘滞阻力进行比较并对实验结果进行了定性分析。 相似文献
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介绍了“神光-I”ICF实验中硬X射线发射角分布实验观察结果,做了简单讨论并与国外同类实验结果做了比较。 相似文献
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为研究MCNP伴随计算与正算的一致性及其差异, 利用3个模型作为算例进行比较计算, 并对其结果进行分析。 模型I的计算结果表明, 伴随计算与正算结果基本一致, 而且伴随计算的FOM值大约为正算的2倍左右; 模型Ⅱ研究了伴随计算对不同材料的适用性, 结果显示, 在散射截面较大的情况下, 伴随计算的通量与正算通量的差异在20%左右, 而且正算的FOM值比伴随计算的大; 模型Ⅲ研究了伴随在产生重要函数中的应用, 并与权窗进行比较, 经分析, 虽然它们产生重要函数的机制不同, 但所得函数的性质基本相同, 而且使用伴随重要函数的FOM值大约是使用权窗的1.5倍。 In order to investigate the agreement and difference between adjoint and forward calculations with Monte Carlo method, three models have been simulated, and the calculated results are compared and analyzed. First, the comparison shows that the calculated results of the adjoint calculation are basically consistent with those of the forward calculation in modelⅠ. The FOM value of adjoint calculation is about two times of the value of forward calculation. Second, it is investigated with modelⅡ that the applicability of the adjoint calculation for the different materials, and the results show that the difference is about 20% for the case of strong scattering between the adjoint calculation and forward calculation. The FOM value of the forward calculation is larger than that of the adjoint calculation. Finally, the important function is generated by the adjoint calculation in model Ⅲ, and the results are compared with ones of the weight window game. Although their important functions are produced by different mechanisms, the values of functions are in agreement with each other, and the FOM value of ajoint calculation is about 1.5 times of the value from the weight windows. 相似文献
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Different methods for the calculation of the sound reduction index using modal analysis are described. The calculations use two steps: a vibratory study to determine the transverse displacement of the plate and a study of radiation. Orthotropic plates are studied in particular and the resulting calculation algorithm has been programmed. Initial hypotheses are indicated, as well as results obtained for various plates or partitions. Modal analysis calculation results are then compared to results of the Cremer-Sewell approach. 相似文献
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简要阐述了求解离子光学系统电场结构分布以及带电粒子在该电场中运行轨迹的通用数值计算方法,分析了在保证计算精度的前提下,节省磁盘空间、提高计算速度的PC级计算机上优化算法,并提出一种寻找最佳超松弛因子的可行性方法.在PC级计算机上应用该计算方法对一台无栅网结构高分辨率反射式飞行时间质谱仪进行计算,给出了电场分布、粒子飞行轨迹和设定各种不同条件对电场进行优化的结果.根据计算结果调整的反射式飞行时间质谱仪达到了其优化工作状态,所测得的质谱分辨率显著提高. 相似文献
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MODTRAN是目前流行的红外辐射传输计算模型。应用FORTRAN语言编写的MODTRAN源代码,集成MODRAN计算软件,设计了MODTRAN软件图形界面。针对FORTRAN语言计算效率高而图形功能弱,Visual Basic (VB) 计算效率低而图形功能强的特点,用VB 和FORTRAN 2种语言混合编程,实现FORTRAN 计算程序资源的再利用。将FORTRAN 程序转化为动态链接库函数,通过函数参数传递使VB程序和FORTRAN动态链接库函数之间交换数据,将FORTRAN的计算结果在VB窗体上显示并进行作图处理,从而实现MODTRAN计算程序的图形界面及计算结果的可视化。设计出MODTRAN的汉化使用界面,有利于MODTRAN在国内推广应用。 相似文献
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The results of a variation after angular momentum projection calculation with axial Nilsson-BCS-like intrinsic wave functions and a cranked Hartree-Fock-Bogoliubov calculation for the back-bending region in 158Er are reported. The moment-of-inertia values in the former are closer to the experimental results. 相似文献
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本文介绍了高空核爆炸火球的二维辐射流体力学计算的主要计算方法和部分计算结果,用柱对称最大熵变Eddington因子P-1近似方程描述了高空核爆炸的辐射输运过程,讨论了P-1近似的边界条件,对能量方程和P-1近似方程的耦合,给出了一个新的差分格式,提高了耦合计算的精度,显著地减少了计算量,同时有效地克服了辐射输运计算中出现的非物理振荡现象。 相似文献
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《Waves in Random and Complex Media》2013,23(2):362-377
This paper presents calculations of a new formulation of the three‐dimensional Kirchhoff approximation which allows calculation of the scattering of vector waves from two-dimensional (2D) metal and dielectric rough surfaces containing infinite slopes. Results are presented for scattering from metal surfaces with rectangular surface structures. This type of surface has applications, for example, in remote sensing and in testing or imaging of printed circuits. Some calculations for rectangular-shaped grooves in a plane are presented for the 2D surface method and are compared to previously published results using a different method of calculation. Good agreement is found between the results for the different calculation methods. 相似文献