关于理想平行板电容器充电过程的能量传输问题

通过对基于简单RC电路的理想平行板电容器缓慢充电过程的研究,得到了相关的电磁场分布以及能量分布,并讨论了其中的电磁场能量传输问题．     

也谈理想平行板电容器充电过程的能量传输问题

通过对理想平行板电容器充电过程中内部电场与磁场的计算,得出内部电场与磁场分布不均匀的结论,从而较圆满地解释了充电过程中的能量传输问题．     

Instability of a periodically moving plate

The parametric instability of the in-plane motion of a rectangular plate of periodically varying length is investigated. The boundaries of the instability regions are found and plotted.     

旋转椭球形电容器的静电能

利用复数坐标系z上的儒可夫斯基变换,计算带电旋转椭球形电容器的静电能,并对结果进行了讨论.     

非平行板电容器电容的边缘效应研究

本文利用保角变换将非平行板电容器变换为平行板电容器;再利用施瓦兹-克利斯多菲变换计算考虑边缘效应时电容器的电容.讨论了平板倾斜角和边缘效应对平板电容器电容的影响.     

Method for controlled extraction of energy stored in a capacitor

A method of controlled extraction of the energy stored in a capacitor with the required power over a long period of time is proposed. It is shown that capacitors can be used as autonomous source of electric power. Zh. Tekh. Fiz. 69, 118–121 (August 1999)     

非平行板电容器电容的又一算法

应用平行板电容器电容的概念和并联电容器电容公式,给出了非平行板电容器的电容及电场分布.     

Eddy currents in a metal plate moving in a steady magnetic field

Russian Physics Journal -     

The electrostatic capacitance of an inclined plate capacitor

Considering the dimension and relative position of the two plates, the capacitance of an inclined plate capacitor is precisely calculated. Conformal mappings are employed and elliptic functions are used for achieving the general result. Taking the fringing effect into account, the inner capacitance and outer capacitance of the inclined angle are added to obtain a reliable result. The expression for computing the fringing capacitance of a parallel-plate capacitor and the capacitance of a parallel-strip transmission line in a plane are presented as special cases.     

旋转椭球形电容器的电容与静电能

采取一种新的方法求解得出了旋转椭球形电容器的电容和静电能.     

Flow past a continuously moving flat plate in transverse magnetic field

The analysis of flow past a continuously moving semi-infinite flat plate in the presence of transverse magnetic field has been presented. Model solutions have been derived and the resulting equations are integrated numerically. Velocity profiles are displayed graphically and the numerical values of the transverse velocity skin friction are given in the form of tables. It has been observed that an increase inM (magnetic field parameter) leads to a decrease in velocity.The author wishes to express his thanks to Dr. H. N. Siddiquie, Director, and Dr. J. S. Sastry, Head, Physical Oceanography Division, for their keen interest and encouragement throughout this work.     

Force exerted on a conducting spherical particle near the plate of a plane capacitor

The potential energy and the interaction force of a conducting spherical particle and a similarly charged plane plate are calculated for relatively small distances. The force is calculated from the potential energy and the plate is represented as a conducting sphere whose radius is 100 times greater than the radius of the particle. It is assumed that the particle is not charged by the plate. The domains of parameters in which the particle is always repulsed from the plate and in which the attraction takes place are determined.     

Active control of the plate energy transmission in a semi-infinite ribbed plate

Active control of the plate flexural wave transmission through the beam in a semi-infinite beam-reinforced plate is analytically investigated. The ribbed plate is modeled as a continuous system, using equations of motion to describe the plate in flexure and the beam in both flexure and torsion. The maximum transmission of the plate flexural waves through the reinforcing beam is found to occur at resonance frequencies corresponding to the optimal coupling between the plate flexural waves and the flexural and torsional waves in the beam. A single control force is applied to the beam, and a cost function is developed to attenuate the far-field flexural energy transmission. It can be observed that the transmission peaks corresponding to the flexural resonances in the beam are reduced. Similarly, the transmission peaks corresponding to the torsional resonance conditions in the beam can be attenuated using a single control moment applied to the beam. Significant attenuation of all the resonance peaks in the flexural wave transmission can also be achieved with the application of a single force and a single moment collocated on the beam. In this paper, the feasibility of attenuating the flexural wave transmission due to both the flexural and torsional resonance conditions by using a single point force and point moment collocated on the beam is demonstrated.     

高储能密度陶瓷电容器的性能

 根据陶瓷介质材料具有高介电常数和高工作场强的特性，从理论上分析了陶瓷电容器具有的储能密度高、可工作在数kHz至数MHz的振荡放电回路中和老化缓慢等特性。对试制的1μF/500V的多层陶瓷电容器（MLC）试样品进行了750V 的1min直流耐压和100Hz重复充放电等可靠性试验研究，结果表明：该MLC在500V工作电压下（对应的体积储能密度达到720J/L）重复充放电寿命达10⁷次以上；50kHz振荡放电输出电流峰值达320A；试验前后电气性能保持不变。因此，这种陶瓷电容器适合用作强脉冲大功率电源的储能元件。     

Dissipation energy for a charge moving near a metal surface

The energy dissipated by a moving charge approaching a metal has been obtained for a wide range of the incoming velocities. Regime limits for very small or very great velocities are analysed as particular cases, and some experimental evidence for the system He⁺/Au is discussed in the light of our results.     

Fermi energy of electrons in a thin metallic plate

A strict analytical expression for the Fermi energy of electrons in a thin metallic plate as a function of the plate thickness at a given electron density has been derived for the first time. The derivation has been carried out taking into account the size quantization in the free-electron approximation at zero temperature.