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Independent N-Electron Method and High Accuracy Calculations of the Ground State Energy of the Nonrelativistic Light Atoms (3 Ne 10)

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Communications in Theoretical Physics 2001年第7期36卷 79-84页

作者： xie Yan-bo Department of Modern Physics University of Science and Technology of China Hefei 230026 China

A new method based on the independent electron-pair approximation is developed to calculate the correlation energy and the basis size truncation error. The formalisms for the nondegenerate systems are described in this paper. Because all important terms are very efficiently selected and the calculations can be separated into several parts, this new method gives very accurate results and does not require expensive computing facilities. As a test, the ground state energies (GSE) of the nonrelativistic atoms for (3 ≤ Ne ≤ 10) are calculated using this new method. The calculated results are found to be in close agreement with the most recent available version of the exact GSE which is derived from the experimental data after subtracting the contributions from the relativistic effect, QED radiative corrections, finite nucleon mass corrections, and the finite radius of the nuclear size. Those accurate results have not been reproduced for Ne ≥ 5 by any direct theoretical calculations in literatures. Since this method is not restrained to nonrelativistic or Coulomb systems, it should become powerful to study other quantum interacting systems.

关键词： correlation energy basis truncation error independent N-electron approximations ground state energies

Tuning Li_(3)PO_(4)modification on the electrochemical performance of nickel-rich LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)

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International Journal of Minerals,Metallurgy and Materials 2021年第9期28卷 1488-1496页

作者： zhi-kun Zhao Hui-lin xie Zi-yue Wen Ling Liu bo-rong Wu Shi Chen Dao-bin Mu Chao-xiang xie School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Guangdong Key Laboratory of Battery Safety Guangzhou Institute of Energy TestingGuangzhou 511447China Sinoma Synthetic Crystals Co. Ltd.Beijing 100018China Department Shanghai Institute of Space Power-Sources Shanghai 200245China

Surface deterioration occurs more easily in nickel-rich cathode materials with the increase of nickel *** simultaneously pre-vent deterioration of active cathode materials and improve the electrochemical performance of the nickel-rich cathode material,the surface of nickel-rich LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)cathode material is decorated with the stable structure and conductive Li_(3)PO_(4)by a facile *** LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)-1wt%,2wt%,3wt%Li_(3)PO_(4)samples deliver a high-capacity retention of more than 85%after 100 cycles at 1 C under a high voltage of 4.5 *** effect of different coating amounts(0-5wt%)for the LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)cathode is analyzed in *** show that 2wt%coating of Li_(3)PO_(4)gives better performance compared to other coating *** analysis of the structure of the samples during the charge−discharge process is performed by in-situ X-ray *** is indicated that the modification for LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)cathode could protect the well-layered structure under high *** consequence,the electrochemical performance of modified samples is greatly improved.

关键词： nickel rich lithium phosphate coating high voltage

光谱辐射照度国际关键比对装置、方法与结果分析

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光谱学与光谱分析 2025年第1期45卷 1-7页

作者：代彩红王彦飞李玲吴志峰谢一航中国计量科学研究院光学与激光计量科学研究所北京100029

基于高温黑体辐射源和双光栅光谱辐射比较测量系统,中国计量科学研究院自主研制了新一代光谱辐射照度国家基准装置,波长范围覆盖230~2550 nm,以一组稳定的卤钨灯作为副基准灯组,保存和传递光谱辐射照度量值。黑体的温度溯源至铂-碳Pt-C... 详细信息

基于高温黑体辐射源和双光栅光谱辐射比较测量系统,中国计量科学研究院自主研制了新一代光谱辐射照度国家基准装置,波长范围覆盖230~2550 nm,以一组稳定的卤钨灯作为副基准灯组,保存和传递光谱辐射照度量值。黑体的温度溯源至铂-碳Pt-C和铼-碳Re-C共晶点黑体,在3021 K采用钨碳-碳WC-C共晶点黑体进行验证。采用新基准装置,2017年-2019年NIM参加国际计量局组织的光谱辐射照度国际关键比对CCPR-K1.a,比对由全俄光学物理学测量研究院(VNIIOFI)主导,共有12个实验室参加。比对结果表明:除少数实验室外,在250~290、300~1300、1500~2500 nm波长范围,各参比实验室之间的一致性分别为±2.0%、±1.0%和±2.0%。在紫外、可见和近红外波段,NIM与国际比对参考值的平均相对偏差分别为0.13%、0.28%和0.15%。在250~2500 nm全波段,NIM与国际比对参考值的平均相对偏差为0.17%,与2004年平均相对偏差0.9%相比,测量能力提升显著。

关键词：光谱辐射照度国际比对高温黑体测量不确定度国家基准

Spatial Characteristics of Thomson Scattering Spectra in Laser and Magnetic Fields

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Chinese Physics Letters 2019年第7期36卷 34-38页

作者： Li Zhao zhi-Jing Chen Hai-bo Sang Bai-Song xie Key Laboratory of Beam Technology of the Ministry of Education and College of Nuclear Science and Technology Beijing Normal University Beijing 100875 Beijing Radiation Center Beijing 100875

Spatial characteristics of Thomson scattering spectra are studied for an electron moving in the circularly polarized laser field in the presence of a strong uniform magnetic field. The results show that the angular distributions of the spectra with respect to the azimuthal and polar angles exhibit different symmetries, respectively, which depend on the fields and electron parameters sensitively and significantly. Moreover, for relatively large parameters such as high laser intensity, high magnetic resonance parameter as well as large initial momentum of electron, the two lobes in spectra tend to the laser-propagating direction so that the radiation can be collimated in the forward direction. Furthermore, an important finding is that by choosing the appropriate fields and initial momentum of electron, the high frequency part of the Thomson scattering spectra can reach the frequency range of soft x-ray,in which a high radiation power per solid angle as ~10^11 a.u. can be obtained.

关键词： Spatial characteristics studied for an electron can be obtained

Evaluation and analysis of intraspecific competition in maize: A case study on plant density experiment

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Journal of Integrative Agriculture 2018年第10期17卷 2235-2244页

作者： ZHAI Li-chao xie Rui-zhi MING bo LI Shao-kun MA Da-ling Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology Ministry of Agriculture Center for Agricultural Resources Research Institute of Genetics and Development Biology Chinese Academy of Sciences Key Laboratory of Cash Crop Stress Biology for Ulanqab Jining Normal University

Intraspecific competition is a common phenomenon in agricultural production,and maize is one of the most sensitive grass species to intraspecific competition due to its low tillering *** study evaluated and analyzed intraspecific competition in maize,and screened competitive indices that could be used to evaluate intraspecific competition in a maize population.A 2-year field experiment was conducted using the maize hybrid Zhongdan 2 at 12 plant densities ranging from 1.5 to 18.0 plants（pl）*** results showed that the response of single-plant grain yield and dry matter at harvest to increased plant density decreased exponentially and that the harvest index decreased *** response of population-level grain yield to plant density was curvilinear,producing a maximum value at the optimum population ***,the yielddensity equation agreed well with the Steinhart-Hart equation curves,but not with the quadratic equation curves reported by most previous *** indices are used to evaluate competition in a plant population or plant *** present results show that competitive intensity（CI）and absolute severity of competition（ASC）increased with increasing plant density;however,relative yield（RY）and relative reproductive efficiency（RReff）*** different responses of these indices reflect different aspects of *** to the analysis of CI,ASC,RY,and RReff,higher CI and ASC values indicate higher intraspecific competition,whereas higher RY and RReff values indirectly reflect lower intraspecific *** competitive indices evaluate not only the intraspecific competitive intensity under different plant densities of the same cultivar but also those of different cultivars under the same plant ***,some overlap exists in the calculations of ASC,CI,and RY,so one could simply select any one of these indices to evaluate intraspecific competition in a maize *** conclusion,the present study

关键词： maize intraspecific competition plant density competitive indices grain yield

Luminescence and Energy Transfer in Europium and Bismuth Codoped Trisodium Yttrium Silicates

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Chinese Physics Letters 2013年第8期30卷 173-177页

作者： xie Guo-bo Faculty of Computer Guangdong University of TechnologyGuangzhou 510006

Bi^(3+)and Eu^(3+)doped Na_(3)YSi_(2)O_(7) phosphors are prepared with solid state *** luminescence properties of Bi^(3+)and Eu^(3+)in Na_(3)YSi_(2)O_(7) and the energy transfer(ET)from Bi^(3+)to Eu^(3+)are investigated in *** ET mechanism is also ***^(3+)in Na_(3)YSi_(2)O_(7) emits near-ultraviolet(UV)light in a broad band peaking at 394 nm which can be attributed to the transition from excited states 3P0,1 to ground state 1S0 under the excitation of UV light with a wavelength of 309 ***^(3+)in Na_(3)YSi_(2)O_(7) emits orange and red *** co-doping of Bi^(3+)into Eu^(3+)doped Na_(3)YSi_(2)O_(7) introduces an intense absorption band from 270 to 350 nm due to ET from Bi^(3+)to Eu^(3+).The sensitization effect of Bi^(3+)on Eu^(3+)makes it possible that Bi^(3+)and Eu^(3+)co-doped Na_(3)YSi_(2)O_(7) could be used in AlGaN-based UV light emitting diodes as a red phosphor.

关键词： orange attributed excited

Building the toolbox for in vivo glia-to-neuron reprogramming

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Neural Regeneration Research 2024年第6期19卷 1171-1172页

作者： Ye xie bo Chen Departments of Ophthalmology and Neuroscience Icahn School of Medicine at Mount SinaiNew YorkNYUSA

Unlike regenerative-competent species that possess a remarkable intrinsic capacity to replenish lost neurons and restore neurocircuits spontaneously,the central nervous system in adult mammals lacks the ability to compensate for the neuronal loss caused by neurodegenerative diseases or traumatic injuries resulting in permanent loss of *** by earlier discoveries that radial glia or astrocytes isolated from the postnatal cortex can generate neurons.

关键词： injuries cortex diseases

L^(p)-Estimate for Linear Forward-Backward Stochastic Differential Equations

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Acta Mathematica Sinica,English Series 2023年第5期39卷 827-845页

作者： Bing xie zhi Yong YU School of Mathematics Shandong UniversityJinan 250100P.R.China

This paper is concerned with coupled linear forward-backward stochastic differential equations(FBSDEs,for short).When the homogeneous coefficients are deterministic(the non-homogeneous coefficients can be random),we obtain an L^(P)-result(p>2),including the existence and uniqueness of the p-th power integrable solution,a p-th power estimate,and a related continuous dependence property of the solution on the coefficients,for coupled linear FBSDEs in the monotonicity framework over large time *** order to get rid of the stubborn constraint commonly existing in the literature,i.e.,the Lipschitz constant of σ with respect to z is very small,we introduce a linear transformation to overcome the difficulty on small intervals,and then"splice"the L^(P)-results obtained on many small intervals to yield the desired one on a large interval.

关键词： Forward-backward stochastic differential equation L^(P)-estimate monotonicity condition large interval

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Effects of Freeze–thaw Cycles on Soil Mechanical and Physical Properties in the Qinghai–Tibet Plateau

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Journal of Mountain Science 2015年第4期12卷 999-1009页

作者： xie Sheng-bo QU Jian-jun LAI Yuan-ming ZHOU zhi-wei XU Xiang-tian Key Laboratory of Desert and Desertification/State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Institute of Transportation Inner Mongolia University

Extreme freeze-thaw action occurs on the Qinghai-Tibet Plateau due to its unique climate resulting from high elevation and cold *** action causes damage to the surface soil structure, as soil erosion in the Qinghai-Tibet Plateau is dominated by freeze-thaw *** this research,freezing–thawing process of the soil samples collected from the Qinghai–Tibet Plateau was carried out by laboratory experiments to determinate the volume variation of soil as well as physical and mechanical properties, such as porosity, granularity and uniaxial compressive strength, after the soil experiences various freeze–thaw *** show that cohesion and uniaxial compressive strength decreased as the volume and porosity of the soil increased after experiencing various freeze–thaw cycles, especially in the first six freeze–thaw ***, the physical and mechanical properties of the soil were ***, granularity and internal friction angle did not vary significantly with an increase in the freeze–thaw *** structural damage among soil particles due to frozen water expansion was the major cause of changes in soil mechanical behavior in the Qinghai–Tibet Plateau.

关键词： Qinghai Tibet Plateau Soil erosion Freeze thaw action Mechanical behavior