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Calculation of electrostatic energy H_e(fd) on 4f^(N-1)5d Configurations for Heavy Lanthanide Ions

Journal of Rare Earths 2003年第S1期21卷 10-15页

作者：师进生周誓红武志坚张思远 Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied ChemistryChinese Academy of Sciences

For the 4f ( N -1)5d configuration the Coulomb interaction between f and d electrons was parameterized by F_k (fd) with K =2,4,and G_K (fd) with K =1,3,5. The spin-orbit interaction for 4f and 5d electrons can be parameterized by ζ(f) and ζ(d) respectively,which can be compounded into one λ∶λ=aζ(f)+bζ(d) ,where a and b are the corresponding coefficients. The energy expressions of H _e(fd) of the chief low-energy levels of 4f ( N -1)5d configuration for heavy lanthanide ions were calculated and the corresponding spin-orbit parameters λ were also given in LS coupling,which are profitable in analyzing the spectra of the heavy lanthanide ions.

关键词： lanthanide electrostatic energy rare earths

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Analysis of Capacitance Characteristics of Light-Controlled electrostatic Conversion Device

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Chinese Journal of Electronics 2023年第2期32卷 389-396页

作者： LIU Yujie WANG Yang JIN Xiangliang PENG Yan LUO Jun YANG Jun School of Physics and Electronics Hunan Normal University School of Mechatronic Engineering and Automation Shanghai University University of Electronic Science and Technology

In recent years, converting environmental energy into electrical energy to meet the needs of modern society for clean and sustainable energy has become a research hotspot. electrostatic energy is a pollution-free environmental energy source. The use of electrostatic conversion devices to convert electrostatic energy into electrical energy has been proven to be a feasible solution to meet sustainable development. This paper proposes a light-controlled electrostatic conversion device(LCECD).When static electricity comes, an avalanche breakdown occurs inside the LCECD and a low resistance path is generated to clamp the voltage, thereby outputting a smooth square wave of voltage and current. Experiments have proved that LCECD can convert 30k V electrostatic pulses into usable electrical energy for the normal operation of the back-end light-emitting diode lights. In addition, the LCECD will change the parasitic capacitance after being exposed to light. For different wavelengths of light, the parasitic capacitance exhibited by the device will also be different. The smaller the parasitic capacitance of the LCECD, the higher the efficiency of its electrostatic conversion. This is of great significance to the design of electrostatic conversion devices in the future.

关键词： Environmental energy electrostatic energy electrostatic conversion Parasitic capacitance

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Numerical Simulation to Evaluate the Effects of Upward Lightning Discharges on Thunderstorm Electrical Parameters

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Advances in Atmospheric Sciences 2021年第3期38卷 446-459页

作者： Tianxue ZHENG Yongbo TAN Yiru WANG Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory for Aerosol–Cloud–Precipitation of China Meteorological AdministrationNanjing University of Information Science and Technology Nanjing 210044China 2State Key Laboratory of Severe WeatherChinese Academy of Meteorological SciencesBeijing 100081China

A theoretical discussion of the discharge effects of upward lightning simulated with a fine-resolution 2D thunderstorm model is performed in this paper,and the results reveal that the estimates of the total induced charge on the upward lightning discharge channels range from 0.67 to 118.8 C,and the average value is 19.0 C,while the ratio of the induced charge on the leader channels to the total opposite-polarity charge in the discharge region ranges from 5.9%to 47.3%,with an average value of 14.7%.Moreover,the average value of the space electrostatic energy consumed by upward lightning is 1.06×10^9 J.The above values are lower than those related to intracloud lightning discharges.The density of the deposited opposite-polarity charge is comparable in magnitude to that of the preexisting charge in the discharge area,and the deposition of these opposite-polarity charges rapidly destroys the original space potential well in the discharge area and greatly reduces the space electric field strength.In addition,these opposite-polarity charges are redistributed with the development of thunderstorms.The space charge redistribution caused by lightning discharges partly accounts for the complexity of the charge structures in a thunderstorm,and the complexity gradually decreases with the charge neutralization process.

关键词： numerical simulation upward lightning induced charge variation of charge distribution electrostatic energy

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Thermodynamic properties of Reissner-Nordstrm-de Sitter quintessence black holes

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Chinese Physics B 2013年第3期22卷 196-200页

作者：魏益焕任军 Department of Physics Bohai University School of Science Hebei University of Technology

The mass,electric charge,and temperature of black holes in the Reissner-Nordstrm-de Sitter quintessence（RN-dSQ） spacetime are obtained.The heat capacities of the RN-dSQ black holes for certain electric charges and... 详细信息

关键词： Reissner-Nordstrm-de Sitter quintessence(RN-dSQ) black hole heat capacity electrostatic energy dark energy

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