共查询到20条相似文献，搜索用时 140 毫秒
1.
在本文中,提出了一种建立多原子纠缠态的方法．这种方法是基于原子一腔场相互作用．适当制备的原子与初始处于真空态的腔场相互作用后,腔场处于数态和真空态的叠加态;随后把制备在基态的原子注入腔中并经历一个共振单光子转移,原子处于纠缠GHZ态而腔场仍处于真空态． 相似文献
2.
在本文中,提出了一种建立多原子纠缠态的方法,这种方法是基于原子─腔场相互作用．适当制备的原子与初始处于真空态的腔场相互作用后,腔场处于数态和真空态的叠加态;随后把制备在基态的原子注入腔中共经历一个共振单光子转移,原子处于纠缠GHZ态而腔场仍处于真空态． 相似文献
3.
熊志斌 《湖南师范大学教育科学学报》1999,(5)
∧型三能级原子与圆极化光相互作用时,圆极化光将对原子寿命及原子的自发衰变规律产生影响．∧型三能级原子最初处于激发态,圆极化光将改变原子的寿命,并且在几率表达式中出现振荡项． 相似文献
4.
本文研究多模辐射场与N个两能级原子的相互作用。当初始状态为一个原子处于激发态其余原子都处于基态时，得到了自发发射过程中系统的动力学规律。并将计算结果与其他一些已知的理论结果进行比较。 相似文献
5.
本文研究多模辐射场与Ｎ个两能级原子的相互作用。当初始状态为一个原子处于激发态、其余原子都处于基态时，得到了自发发射过程中系统的动力学规律。并将计算结果与一些已知的理论结果进行比较。 相似文献
6.
熊光哲 《数理化学习(高中版)》2006,(6)
一、氢原子能级问题 1．玻尔原子模型假说内容①轨道量子化:原子核外电子的可能轨道是某些分立的数值,即rn=n2r1．②能量状态量子化:原子只能处于与轨道量子化对应的不连续的能量状态中,在这些状态原子量是稳定 相似文献
7.
一、光子使原子跃迁
原子的跃迁条件hv=Em-En,适用于光子使原子在各定态之间跃迁的情况,当光子能量较大时,与原子作用而使原子电离,产生离子和自由电子时,原子结构被破坏,如基态氢原子的电离能为13．6eV,只要大于或等于13．6eV的光子都能被处于基态的氢原子吸收而发生电离,电离所产生的自由电子的动能等于入射光子能量减去电离能． 相似文献
8.
运用量子熵理论并借助于数值计算方法。研究与级联三能级原子相互作用的二项式光场的熵压缩性质．光场的初始参量对光场熵压缩的影响．当初始光场处于相干态时．在较短时间内光场出现熵压缩效应；当初始光场处于中间态时。光场熵压缩的深度和持续时间增加；当初始光场过渡到数态时．光场熵压缩明显减弱直到消失．研究结果表明：在与原子相互作用过程中。从相干态到数态过渡的中间态光场具有较好的熵压缩性质． 相似文献
9.
本文用量子理论研究激光场与三个原子的相互作用。当初始条件为激光场中有N个光子,而三个原子都处于高能级时,得到了光子数和原子状态各自随时间的变化关系。光子数很大时,量子理论结果与半经典理论结果是一致的。 相似文献
10.
用三维型哈密顿量描述单模激光场与N个两能级原子相互作用。当模2很强（即处于基态的原子数目很大）时，得到了作用系统的动力学规律，并将计算结果与一些已知的结果进行比较。 相似文献
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12.
Resonant frequencies of a piezoelectric drum transducer 总被引：1，自引：0，他引：1
This paper presents a piezoelectric-metal structure called a drum transducer. An equation for calculating the resonance frequency of the drum transducer is obtained based on thin plate elastic theory of piezoelectric and metal material combined with the Rayleigh-Ritz method. The finite element method （FEM） was used to predict the excitation frequency of the drum transducer. To verify the theoretical analysis, the input impedance characteristic of the drum transducer was measured using an experimental method. The results obtained from theoretical analysis were in very good agreement with those from the FEM and experimental results. The effect of geometrical changes to the thick-walled steel ring of the drum transducer at the first resonance frequency is also described. The calculated results were found to be in good agreement with the FEM results. The results indicate that the first resonance frequency of the drum decreases with the increasing inner diameter of the thick-walled steel ring. 相似文献
13.
本文运用矩法分析了我院2000级成人医专的7门医学基础课的考试成绩,结果显示考试成绩呈正态分布的有2门,呈非正态分布有5门.根据成绩分布特点结合本院教学实情,讨论在新形势下如何提高成教医专科的教学质量问题. 相似文献
14.
钢筋砼L-形截面双向拉弯构件正截面承载力的研究 总被引：1，自引：0，他引：1
对钢筋砼 L-形截面双向拉弯构件的正截面承载力进行了研究 ,还对三根钢筋砼 L-形截面双向拉弯构件进行了试验研究 .编制了计算机程序 ,可用于各种类型截面的计算 ;并用此程序对 L-形截面在双向拉弯作用下的 N- M相关曲线、等轴力下的 Mx- My相关曲线进行了计算分析 ,理论计算结果与试验结果吻合较好 相似文献
15.
This study investigated students’ responses to presentations of experimental results that conflicted with their preconceptions
regarding electric circuits, and how those responses varied according to the type of inquiry skills required to obtain the
results. One hundred and twenty students of both sexes were randomly selected from a science high school in Korea. They were
questioned about their preconceptions regarding an electric circuit and forty-two students with relevant misconceptions were
selected. The students were randomly assigned to two groups, and presented with one of two sheets of paper presenting results
obtained by a fictional investigator. The first group was presented with results that were obtained by simple observation
and asked for their evaluation of them. The second group was presented with a set of results that were obtained by controlling
variables, and asked to draw a conclusion and to evaluate it. Students’ responses were classified into two categories. Some
students rejected their own preconceptions and introduced a new explanatory model when contradictory results were presented,
and others denied the results for the simple reason that they conflicted with their preconceptions, or only modified a protective
belt without changing their core of preconceptions. We found that this distribution of responses varied considerably by inquiry
skill type. For the results obtained by controlling variables, almost all students accepted them and changed their preconceptions,
but for the results obtained by simple observation, fifty-five percent of students preserved their own preconceptions by denying
the contradictory results or modifying the protective belt. 相似文献
16.
本文通过对糯玉米评价体系进行量化,以形成量化评定的结果,从产量和品质两方面,依次与原始评定结果及排序进行比较.最后得出:量化指标评定体系是目前较为科学、合理的方法. 相似文献
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18.
传统的主动轮廓模型只利用图像的边缘或者只利用区域特征实现图像分割。在有些情况下图像分割效果较差．本文给出了一种综合利用图像边缘和区域特征的主动轮廓图像分割方法．实验表明,演变后的曲线与图像的边缘是吻合的,图像分割的结果较好．而对相同的图像应用传统的主动轮廓分割算法得到的图像分割结果则很差．这说明新算法明显提高了传统算法的图像分割性能． 相似文献
19.
基于B/S结构的学生成绩管理系统的设计与实现 总被引：3，自引：0，他引：3
孙雯 《安徽教育学院学报》2006,24(6):54-57
在分析了现有高校学生成绩管理状况的基础上,提出了基于B/S结构,以ASP为关键技术的学生成绩管理系统的合理解决方案。该系统的设计与开发能够实现学生成绩管理的网络化,方便教师网上登录成绩和学生网上查询成绩,不仅大大节省了人力资源,更有利于推动高校“无纸化办公”的进程。 相似文献
20.
Joanna Ulatowska 《教育心理学》2017,37(3):251-260
This study aimed to test beliefs about cues to deception and the ability to detect lies in a group of teachers with different teaching experience. Their results were compared with the results of non-teachers matched in age and with the results of educational studies and psychology students. Both the beliefs of deception indicators and overall truthfulness assessment did not differ between groups. Teaching experience had no effect on any of the skills tested. In accordance with expectations, the truth bias appeared in both the control group and in the group of teachers. 相似文献