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Exact Solution of a Backward Scattering Kondo Model

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Chinese Physics Letters 1996年第9期13卷 703-706页

作者： wang yu-peng PU Fu-ke Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Department of Physics Guangzhou Teachers’CollegeGuangzhou 510400 Institute of Physics Chinese Academy of SciencesBeijing 100080

To specify the difference between the one-dimensional Kondo problem and the three-dimensional Kondo problem,we consider a model which describes the interaction between one-dimensional free electrons and a magnetic *** ansatz exact results and scaling analysis show that if J_(F)>-|J_(B)|,the Kondo screening *** is no ferromagnetic Kondo screening in such a system but the long range antiferromagnetic Kondo coupling is *** soon as the Coulomb interaction is introduced,the crossovers between the scaling trajectories in the parameter region J_(F)<-|J_(B)|and the trajectories in other parameter regions arise and ferromagnetic Kondo screening may occur.

关键词： Kondo ferromagnetic scaling

Climatologic comparison of HadISST1 and TMI sea surface temperature datasets

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Science China Earth Sciences 2011年第8期54卷 1238-1247页

作者： wang yu LIU peng LI TianYi FU yunFei Laboratory of Atmospheric Observation and Climatological Environment School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China

Two monthly datasets of sea surface temperature (SST),TMI SST retrieved from satellite observations by Remote Sensing System and HadISST1 (Hadley Centre Sea-ice and Sea-surface Temperature Data Set Version 1) derived from in situ measurements by Hadley Centre,were compared on climatologic multiple time scales over tropical and subtropical areas from 1998 to *** indicate that there is a good consistency in the horizontal global distribution,with 1.0° resolution on multi-year and multi-season mean scales between the two datasets,and also in the time series of global mean SST ***,there are still some significant differences between the ***,TMI SST is relatively higher than *** addition,the differences between the two datasets show not only remarkable regionality,but also distinct seasonal ***,the maximum departure occurs in summer,while theminimum takes place in *** all seasons,over 30% of the regions in the Tropical and Subtropical areas have a difference of more than 0.3°*** analysis of the SST anomaly field also shows that there are differences between the two datasets,where HadISST1 has more significant statistical characteristics than TMI *** the other hand,results show that the difference between the two datasets is related to the vertical structure of ocean temperatures,as well as other simultaneously retrieved parameters in TMI products,such as wind speed,water vapor,liquid cloud water and rain *** addition,large biases between HadISST1 and TMI SST are found in coastal regions,where TMI SST cannot be accurately retrieved because of polluted microwave signals.

关键词： sea surface temperature HadISST1 TMI EOF analysis

Effect of Vegetation Succession on Organic Carbon,Carbon of Humus Acids and Dissolved Organic Carbon in Soils of Copper Mine Tailings Sites

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Pedosphere 2014年第2期24卷 271-279页

作者： SHEN Zhang-Jun wang yu-peng SUN Qing-Ye wang Wei School of Resources and Environment Engineering Anhui University School of life Science Hefei Normal University Anhui Agricultural University

Carbon of humus acids(HSAC) and dissolved organic carbon(DOC) are the most active forms of soil organic carbon(SOC) and play an important role in global carbon recycling. We investigated the concentrations of HSAC,water-soluble organic carbon(WSOC),hot water-extractable organic carbon(HWOC) and SOC in soils under different vegetation types of four copper mine tailings sites with differing vegetation succession time periods in Tongling,China. The concentrations of HSAC,WSOC,HWOC and SOC increased with vegetation succession. WSOC concentration increased with the accumulation of SOC in the tailings,and a linearly positive correlation existed between the concentrations of HSAC and SOC in the tailings. However,the percentages of HSAC and DOC in the SOC decreased during vegetation succession. The rate of SOC accumulation was higher when the succession time was longer than 20 years,whereas the speeds of soil organic matter(SOM) decomposition and humification were slow,and the concentrations of HSAC and DOC increased slowly in the tailings. The percentage of carbon of humic acid(HAC) in HSAC increased with vegetation succession,and the values of humification index(HI),HAC/carbon of fulvic acid,also increased with the accumulation of HSAC and SOC in soils of the tailings sites. However,the HI value in the each of the tailings was less than 0.50. The humification rate of SOM was lower than the accumulation rate of SOM,and the level of soil fertility was still very low in the tailings even after 40 years of natural restoration.

关键词： fulvic acid hot water-extractable organic carbon humic acid humification index water-soluble organic carbon

Ferromagnetism in an Electron Gas Obeying Fractional Statistics

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Chinese Physics Letters 2001年第7期18卷 868-869页

作者： YANG Kai-Hua HAN Ru-Shan wang yu-peng Department of Physics Peking UniversityBeijing 100871 Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080

We study an ideal electron gas obeying fractional *** parameters for exclusion statistics are given by the strength of the repulsive *** some parameter regions,it is found the system shows itinerant ferromagnetism.

关键词： Electron fractional system

An Integrable Bose Fermion Model

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Chinese Physics Letters 1999年第11期16卷 787-789页

作者： YANG Fan wang yu-peng CHEN Shu PU Fu-ke Institute of Physics and Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080 Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Theoretishe Physik II Universität Augsburg 86135AugsburgGermany Department of Physics Guangzhou Normal CollegeGuangzhou 510400

In this paper, we derive the higher order Hamiltonian of the three-wave interaction fermion model II by the Neumann expansion and find it physically interesting as related to the pairing process of the high Tc super-c... 详细信息

关键词： method Fermi inverse

New Resistance Anomaly in Superconducting Bi_(2)Sr_(2)CaCu_(2)O_(8) Single Crystals

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Chinese Physics Letters 2000年第12期17卷 907-908页

作者： wang Wen-Hu ZHOU yu-Qin CHEN Zhao-Jia ZHENG Ping JIN Duo wang yu-peng Institute of Physics&Center for Condensed Matter Physics Chinese Academy of SciencesP.O.Box 2711Beijing 100080

We have measured the resistance of some Bi_(2)Sr_(2)CaCu_(2)O_(8) superconducting single crystals along ab plane and the c *** some of the single crystals,a resistivity anomaly near the superconducting transition temperature is observed in the ab *** giant resistance peak is independent of the small driving current(I≤40 mA),and the peak is suppressed and vanished gradually with the increasing applied magnetic field(>100 G).We proposed that the resistance peak is a quasi-reentrant behavior due to the superconducting phase inhomogeneous distribution.

关键词： resistance Crystal driving

Phenotypic analysis of a dwarf and deformed flower3 (ddf3) mutant in rice (Oryza sativa L.) and characterization of candidate genes

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Journal of Integrative Agriculture 2018年第5期17卷 1057-1065页

作者： wang yu-peng TANG shuang-qin WU Zhi-feng SHI Qing-hua WU Zi-ming Key Laboratory of Crop Physiology Ecology and Genetic BreedingMinistry of Education/Collaborative Innovation Center for the Modernization Production of Double Cropping Rice/College of AgronomyJiangxi Agricultural University

Dwarf mutants are the crucial resources for molecular biology research and rice breeding. Here, a rice mutant, dwarf and deformed flower3（ddf3）, was identified in tissue culture of Oryza sativa cv. Dongjin. Compared with wild type, the ddf3 mutant exhibited severe dwarfism, a greater number of tillers and significantly decreased fertility. In addition, leaf length, panicle length, and grain length, were significantly shorter. All internodes of ddf3 were shorter than those of wild type, and histological analysis revealed that internode cell elongation was significantly inhibited in ddf3. In the ddf3 mutant, pollen activity was significantly decreased, and the development of most stigmas was abnormal. Genetic analysis indicated that the ddf3 mutant phenotypes are controlled by a single or tightly linked nuclear genes. Using an F2 mapping population generated from a cross between ddf3 and Yangdao 6（9311）, the DDF3 gene was mapped to a 45.21-kb region between insertion-deletion（In Del） markers M15 and M16 on the long arm of chromosome 7. Sequencing revealed a 13.98-kbdeletion in this region in the ddf3 mutant genome that resulted in the complete or partial deletion of ZF（DHHC type zinc finger protein）, EP（expressed protein）, and FH2（actin-binding FH2 domain-containing protein） genes. Quantitative RT-PCR analyses revealed that in wild type, the transcript levels of FH2 were almost the same in all organs, while ZF was mainly expressed in the panicle, and no expression of EP was detected in any organ. Based on these results, ZF and FH2 could be potential DDF3 candidate genes involved in the regulation of rice morphology and flower organ development. Our work has laid the foundation for future functional analysis of these candidate genes and has provided a profitable gene resource for rice breeding for increased fertility in the future.

关键词： rice dwarf and deformed flower 3 mapping DHHC-type actin-binding FH2 domain

Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： peng Li Meifeng Cai Shengjun Miao yuan Li yu wang Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification

Magnetic Study on Kondo Semiconductor CeNiSn

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Chinese Physics Letters 1998年第2期15卷 131-133页

作者： HOU yu-min JIN Duo YANG Fu-ming RAN Qi-ze wang yu-peng CHEN Zhao-jia HE yu-sheng Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Institute of Physics Chinese Academy of SciencesBeijing 100080

There are two standpoints to explain the formation of the peak of magnetic susceptibility versus temperature in *** is the presence of the pseudo-gapped density of states(DOS)while the other is the development of an antiferromagnetic *** check which one is more reasonable,an experiment is designed on measuring magnetic susceptibility under different magnetic *** is found that magnetic field can shift the peak of the magnetic susceptibility to lower temperatures while by calculation the presence of the pseudo-gapped DOS cannot shift the peak,which gives another evidence of the existence of antiferromagnetic correlations and is discussed in the light of some recent theoretical model.

关键词： correlation. Kondo susceptibility