共查询到20条相似文献,搜索用时 78 毫秒
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经典的波动理论与量子理论均分别对杨氏双缝干涉实验进行了解释。由于两个解释理论一个简单直观、一个复杂抽象,但两者结果一致,使得学生在学习中容易接受波动理论而排斥量子理论。文中通过实验观测了杨氏双缝干涉光场中能量传递与叠加的实际情况,结果显示实验实际情况与波动理论解释明显不相符合,而与量子理论解释完全相符。通过实验,使学生直观地看到波动理论的局限性,并加深学生对量子力学相关理论的理解。 相似文献
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一、引言 光跃迁和热跃迁 早期的工作二、位形坐标理论 位形坐标图和弗郎克-康登原理的应用(赛兹-莫特理论) 能量交换的机构 阿基若维奇关于热跃迁的工作 威廉姆斯关于光跃迁的定量理论 单坐标理论的基本困难三、单频率多坐标理论 光跃迁理论 多坐标,多声子问题的分析 热跃迁理论四、多频率理论的发展 变换式的方法 变换式和光谱分布的各级矩五、理论结果的概述 目前具体计算结果的概况 系统理论与位形坐标图的联系 有待进一步研究的问题 相似文献
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战争有自己的规律可循。战争规律的形成和演变既受内在因素的作用,也受外部条件和环境的影响。工业革命时代孕育了机械化战争,出现了大兵团作战理论、空战理论、海战理论和坦克战理论等,在信息时代有的理论显得过时了,有些理论则在新的条件下有所发展。新的战争理论仍在层出不穷,有些将在新的环境中起主导作用。第二次世界大战是大规模机械化战争的鼎盛时期,也使大兵团作战理论、空战理论、海战理论和坦克战理论等达到了登峰造极的程度。工业的机械化直接推动了战争的机械化,大工业生产使武器系统的全面机械化成为可能,大量的装备是… 相似文献
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分别利用速率方程理论和六温度模型理论对Q开关CO2激光器动力学过程进行了理论分析比较,实验上测得电光调Q射频波导CO2激光器脉冲激光建立时间及峰值功率与速率方程理论和六温度模型理论计算结果一致.但速率方程理论计算的激光脉冲宽度较“窄”,并且几乎没有拖尾,而六温度模型理论计算的脉冲激光波形有明显的拖尾,符合实际测量的波形.另外,六温度模型理论可以全面反映激光器工作气体中不同分子能级的能量转移过程,因此六温度模型理论分析更全面
关键词:
2激光器')" href="#">电光调QCO2激光器
六温度模型理论
速率方程理论 相似文献
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本文回顾了玻尔理论,系统地分析了玻尔理论和经典理论、量子力学之间的联系与本质区别,简要论述了玻尔理论对物理学发展的贡献与历史地位。 相似文献
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N. G. Gusein-zade A. V. Kukushkin A. A. Rukhadze 《Bulletin of the Lebedev Physics Institute》2016,43(6):199-202
The similarity and difference between the Fresnel problem, i.e., the problem of electromagnetic wave reflection and refraction, including that at the Brewster angle, and the problem of surface electromagnetic wave (SEW) excitation on a plane surface of a conducting medium is studied. 相似文献
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Alfredo Canelas Antonio A. Novotny Jean R. Roche 《Journal of computational physics》2011,230(9):3570-3588
The inverse electromagnetic casting problem consists in looking for a suitable set of electric wires such that the electromagnetic field induced by an alternating current passing through them makes a given mass of liquid metal acquire a predefined shape. In this paper we propose a new method for the topology design of such inductors. The inverse electromagnetic casting problem is formulated as an optimization problem, and topological derivatives are considered in order to locate new wires in the right position. Several numerical examples are presented showing that the proposed technique is effective to design suitable inductors. 相似文献
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本文对35 GHz和96 GHz电磁波在等离子体中的传输特性进行了理论与实验研究, 得到了电磁波衰减随等离子体密度、碰撞频率和电磁波频率的变化规律. 等离子体密度增加一个数量级时, 电磁波衰减增加一个数量级; 随着等离子体碰撞频率的增加, 电磁波衰减先增加后减小; 随着电磁波频率的增加, 衰减下降. 以激波管为实验平台进行了电磁波在等离子体中传输特性的实验研究, 实验结果和理论结果吻合较好. 理论和实验结果均表明, 提高电磁波频率是解决黑障问题的有效途径. 相似文献
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The problem of the electromagnetic coupling for spin-3/2 particles is discussed. Following supergravity and some previous researches in the field of classical supersymmetric particles, we found that the electromagnetic coupling must not obey a minimal coupling in the sense of coupling the electromagnetic potential, but some kind of an electromagnetic field strength. 相似文献
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The well-posedness of the initial-boundary value problem of the time-varying
linear electromagnetic field in a multi-medium region is investigated.
Function spaces are defined, with Faraday's law of
electromagnetic induction and the initial-boundary conditions considered
as constraints. Gauss's
formula applied to a multi-medium region is used to derive
the energy-estimating
inequality. After converting the initial-boundary conditions into
homogeneous ones and analysing the characteristics of an operator introduced
according to the total current law, the existence, uniqueness and stability
of the weak solution to the initial-boundary value problem of
the time-varying linear electromagnetic field are proved. 相似文献
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线性瞬态涡流电磁场定解问题的主要特点是边界条件使用磁感应强度的法向分量边界条件代替了电场强度的切向分量边界条件,约束方程中忽略了位移电流.这种具有特殊性的定解问题的解是否唯一和稳定对于求解瞬态涡流电磁场而言是一个基本问题.本文在非涡流区引入标量位函数,证明了在推导过程中起重要作用的辅助函数的存在性.通过推导线性瞬态涡流电磁场定解问题的能量估计式,证明了该定解问题的解是唯一的,并且关于初始条件和外源项是稳定的.本结果对于线性瞬态涡流电磁场的求解有一定的指导意义.作为应用,给出了通有单脉冲电流的单匝圆环线圈与球形导体共轴的涡流问题的解析解.
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瞬态涡流电磁场
能量估计式
唯一性
稳定性 相似文献
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The radiation-driven plasma-turbulence problem is in essence an application problem of electrodynamics. In electrodynamics, electromagnetic fields at any point are determined by all charges and currents in the underlying physical system, the fields' history and physical constraints. Starting from this standpoint, we have proved that radiation-driven electromagnetic turbulence in a plasma can be studied in the same way we study the electrostatic turbulence excited by electromagnetic waves in a plasma by means of a two-fluid approximation, a two-timescale technique, and a two-spacescale technique. The main difference between electromagnetic turbulence model equations and the Zakharov equations governing electrostatic turbulence is that a driving term appears in the former. The physical origin of this driving term is the current that emits the radiation which supplies the free energy source that gives rise to both electromagnetic and electrostatic turbulences. Simulated electromagnetic emissions, large scale density perturbation and anomalous absorption can be calculated quantitatively based on the electromagnetic turbulence model equations.Published from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 39, No. 1, pp. 108–120, January, 1996. 相似文献
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在二维埋均匀介质中,将大地电磁问题可看作电磁波在有耗开放波导中的传播问题,借用研究波导问题的数值模式匹配法予以解决,在计算Ex型问题时,使用Hermite基函数和非均匀无素;在计算Hx型问题时,使用变型Hermite基函数,并与有限元法进行了比较。 相似文献
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S. P. Gavrilov S. I. Tarapov A. A. Vertiy M. E. Özel 《International Journal of Infrared and Millimeter Waves》1996,17(10):1719-1734
The problem deals with the evolution of the electromagnetic field inside resonator with the paramagnetic filling is considered. The complex magnetic susceptibility obtained from the Bloch equations has been presented in a form of power series intensity of the electromagnetic field. The solution of evolution equations describing the time dependence of the electromagnetic field inside the resonator under the conditions of harmonical excitation is obtained. 相似文献