共查询到20条相似文献，搜索用时 359 毫秒
1.
薛海国 《赤峰学院学报(自然科学版)》2014,(3):8-9
根据双矩孔的夫琅禾费衍射在屏幕上的相对衍射强度公式,利用matlab软件模拟不同形状双矩孔夫琅禾费衍射图样与强度分布,从而找出不同形状双矩孔与衍射图样之间的内在规律. 相似文献
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钱宏明 《绵阳师范学院学报》2015,(2):30-33,113
根据夫琅禾费衍射的光强分布公式,结合Origin软件的矩阵和绘图功能,对夫琅禾费衍射现象进行计算机仿真,得到夫琅禾费圆孔、单缝、矩孔衍射的光强分布以及衍射图样. 相似文献
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利用基尔霍夫衍射理论,推导出不同房子形孔的Fraunhofer（夫朗禾费）衍射在屏幕上的相对衍射强度的分布公式．并利用mathematic软件模拟了不同房子形孔的Fraunhofer衍射图样与强度分布,从而找出了不同房子形孔的形状与Fraunhofer衍射图样之间的内在规律． 相似文献
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《开封教育学院学报》1998,(2)
光的干涉、光的衍射是光学课程中两个最重要的内容。而杨氏双缝干涉实验,夫琅禾费单缝衍射又是光的干涉、光的衍射中的两个最基本问题.在研究杨氏双缝干涉实验时,干涉图样的条纹间距与入射光波长、缝间距离、观察屏和缝的距离都有关系.对夫琅禾费单缝衍射,当入射光的波长及狭缝宽度给定以后,衍射图样条纹间距与透镜焦距f成正比. 相似文献
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分析了在计算机模拟光学衍射过程中,把连续的菲涅耳衍射积分公式离散化为离散菲涅耳变换的方法,并用离散菲涅耳变换计算出任意形状衍射屏的衍射光场．应用MATLAB的GUI工具开发了光学衍射仿真软件,它不仅能模拟常见光孔的衍射,也能对如刀片等复杂形状衍射屏的菲涅耳衍射和夫琅禾费衍射进行模拟,有助于理解衍射光在传播方向上近场衍射和远场衍射的不同和衍射花样的分布特征． 相似文献
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林树 《四川教育学院学报》2005,21(9):95-96
文章研究了夫琅和费衍射图样的对称性与孔径的关系。用夫琅和费衍射的傅里叶变换观点，在衍射孔径上的场无位相变化的情形下，就不同形状孔径，对其夫琅和费衍射图样的对称性问题作比较深入的讨论。 相似文献
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张兴坊 《中国现代教育装备》2024,(5):56-58
根据光的干涉和衍射原理,利用MATLAB GUI设计了杨氏双缝、劈尖、牛顿环、迈克尔逊干涉和夫琅禾费单缝、圆孔、矩孔、多缝衍射等实验的交互式仿真界面,不仅能显示相关物理参量对干涉或衍射图样的影响,而且能展示图样的动态效果。该平台的运用有助于增强学生对光学现象及原理的理解,提高学生的科学创新能力。 相似文献
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分析了夫琅禾费双矩孔衍射及其特例的光强分布,基于Matlab软件实现了夫琅禾费双矩孔衍射及其特例的计算机仿真.结果表明,夫琅禾费双矩孔衍射的光强分布为两个矩孔衍射的相干叠加结果;仿真图像与实际实验的结果一致,可应用于光学辅助教学等. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
12.
Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献