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Quadratic Yukawa coupling and matrix Yukawa coupling in the large N expansion

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Chinese Science Bulletin 2014年第5期59卷 484-491页

作者： Song shi Wei-min Sun Hong-shi Zong Department of Physics Nanjing University State Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Science Joint Center for Particle Nuclear Physics and Cosmology

In this article,we study three types of new Yukawa couplings(the boson field is coupled to the fermion field).Two of them are quadratic Yukawa couplings(the boson field is in the form of a vector),and the other one is the matrix Yukawa coupling(the boson field is in the form of a matrix).Based on the above three couplings,we introduce the Higgs mechanism,and find out the properties of the generated mass for the fermions with multiple *** the matrix boson,we introduce its coupling with non-Abelian gauge *** turns out that the generated mass of the gauge field through the Higgs mechanism is *** the large N limit,using the method of auxiliary field,we study the dynamical behaviors of the quadratic Yukawa couplings,including the poles of some dressed propagators.

关键词：场耦合矩阵希格斯机制玻色子场费米子场动力学行为联轴器规范场

Calculation of Partition Function of QCD at Finite Chemical Potential

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Communications in Theoretical Physics 2008年第2期49卷 435-438页

作者： SUN Wei-min ZONG Hong-shi Department of Physics Nanjing University Nanjing 210093 China joint Center for Particle Nuclear Physics and Cosmology Nanjing 210093 China

In equilibrium statistical field theory, the partition function has fundamental importance. In this paper we propose a direct and general method for calculating the partition function and equation of state of QCD at finite chemical potential. It is found that the partition function is totally determined by the dressed quark propagator at finite chemical potential up to a multiplicative constant. From this a criterion for the phase transition between the Nambu and the Wigner phases is obtained. This general method is applied to two specific cases： the free quark theory and QCD with a model dressed quark propagator having confinement features. In the first case, the standard Fermi distribution at T = 0 is reproduced. In the second case, we apply the conclusion in previous works to obtain the dressed quark propagator at finite chemical potential and find the unphysical result that the baryon number density vanishes for all values of chemical potential. The reason for this result is discussed.

关键词： partition function of QCD phase transition

Susceptibilities of QCD Vacuum from Renormalized Dyson-Schwinger Equations]

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Communications in Theoretical Physics 2004年第6期41卷 917-920页

作者： CHENWei QIshi SUNWei-min ZONGHong-shi DepartmentofPhysics NanjingUniversityNanjing210093China CCAST（WorldLaboratory） P.O.Box8730Beijing100080China

The pion and tensor vacuum susceptibilities are calculated in the framework of the renormalizable DysonSchwinger equations. A comparison with the results of other nonperturbative QCD approaches is given.

关键词： QCD vacuum vacuum susceptibility Dyson-Schwinger equations

Plant Pharmacophylogeny:Review and Future Directions

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Chinese Journal of Integrative Medicine 2022年第6期28卷 567-574页

作者： GONG Xue YANG min HE Chun-nian BI Ya-qiong ZHANG Chun-hong LI min-hui XIAO Pei-gen Department of Pharmacy Baotou Medical CollegeBaotouInner Mongolia Autonomous Region014040China Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100193China Pharmaceutical Laboratory Inner Mongolia Institute of Traditional Chinese MedicineHohhot010020China Guangxi Botanical Garden of Medicinal Plants Nanning530000China Inner Mongolia Key Laboratory of Characteristic Geoherbs Resources Protection and Utilization Baotou Medical CollegeBaotouInner Mongolia Autonomous Region014040China

Medicinal plants have provided numerous medicinal active ingredients for thousands of years and these ingredients have been used in Chinese medicine(CM)and traditional pharmacologies ***,the exploitation and utilisation of medicinal plant resources has increased *** results of the studies have led to the identification of many active components,such as steroidal alkaloids,saponins,terpenoids,and glycosides,in various medicinal plants with different evolutionary ***,research on the chemical classification,molecular phylogeny,and pharmacological activity of medicinal plants is increasing in *** is an interdisciplinary topic that studies the correlation between plant phylogeny,chemical composition,and curative effects(pharmacological activity and the traditional curative effect)of medicinal *** addition,it provides the basic tools to enable research and development of CM *** literature review,based on the genetic relationship between phytogroup and species,highlights the formation process,research content,applications,and future directions of pharmacophylogeny.

关键词： pharmacophylogeny phytogroup molecular phylogeny chemical composition curative effect

Experimental studies of H_(2)/Ar plasma in a cylindrical inductive discharge with an expansion region

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Chinese Physics B 2024年第10期33卷 321-330页

作者： shi-Bo Li Si-Yu Xing Fei Gao You-nian Wang Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China

The electrical parameters of H_(2)/Ar plasma in a cylindrical inductive discharge with an expansion region are investigated by a Langmuir probe,where Ar fractions range from 0%to 100%.The influence of gas composition and pressure on electron density,the effective electron temperature and the electron energy probability functions(EEPFs)at different spatial positions are *** driver region,with the introduction of a small amount of Ar at 0.3 Pa,there is a rapid increase in electron density accompanied by a decrease in the effective electron ***,the shape of the EEPF transitions from a three-temperature distribution to a bi-Maxwellian distribution due to an increase in electron-electron ***,this phenomenon resulting from the changes in gas composition vanishes at 5 Pa due to the prior depletion of energetic electrons caused by the increase in pressure during hydrogen *** EEPFs for the total energy in expansion region is coincident to these in the driver region at 0.3 Pa,as do the patterns of electron density variation between these two regions for differing Ar *** 5 Pa,as the discharge transitions from H_(2)to Ar,the EEPFs evolved from a bi-Maxwellian distribution with pronounced low energy electrons to a Maxwellian distribution in expansion *** evolve may be attributed to a reduction in molecular vibrational excitation reactions of electrons during transport and the transition from localized electron dynamics in hydrogen discharge to non-localized electron dynamics in argon *** order to validate the experimental results,we use the COMSOL simulation software to calculate electrical parameters under the same *** evolution and spatial distribution of the electrical parameters of the simulation results agree well with the trend of the experimental results.

关键词： inductively coupled plasma transmission and distribution energy distribution functions

Factors Affecting the Mechanical Properties of Ultra-high-strength Bainitic Steel Containing W and 0.33 mass% C

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Journal of Iron and Steel Research International 2016年第3期23卷 289-296页

作者： shi-meng ZHOU Xing-wang CHENG You-jing ZHANG Meng WANG Wen JIANG Hong-nian CAI School of Materials Science and Engineering Beijing Institute of Technology National Key Laboratory of Science and Technology on Materials under Shock and Impact Beijing Institute of Technology

A novel ultra-high-strength bainitic steel was *** analysis of its mechanical properties by quasistatic testing showed that upper bainitic steel exhibited an ultimate tensile strength of 2 260 MPa（engineering stress）and an ultimate compressive strength of more than 2 700MPa（true stress）.The ultra-high strength of upper bainitic steel was mainly attributed to untempered martensite and upper bainite with a feather-like ***,lower bainitic steel demonstrated an ultimate tensile strength of 1 922 MPa（engineering stress）and an ultimate compressive strength of 2 500MPa（true stress）.The ultra-high strength of lower bainitic steel was primarily due to untempered martensite and lower bainite with an acicular *** untempered martensite in the two kinds of bainitic steels was produced in different *** dynamic test results showed that the ultimate compressive strengths of the two bainitic steels were maintained at 1 600MPa（true stress）under high strain rates（1 100and2 200s-1）at 600℃,because of the added tungsten,confirming the satisfactory hot hardness property of the ***,lower bainitic steel showed better comprehensive mechanical properties than upper bainitic steel.

关键词： upper bainite lower bainite bainitic ferrite retained austenite untempered martensite mechanical property

Radioiodinated tyrosine based carbon dots with efficient renal clearance for single photon emission computed tomography of tumor

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Nano Research 2019年第12期12卷 3037-3043页

作者： nian Liu Yiyue shi Jingru Guo Hai Li Qiang Wang Menglin Song Zhiyuan shi Le He Xinhui Su Jin Xie Xiaolian Sun State Key Laboratory of Natural Medicines Key Laboratory of Drug Quality Control and PharmacovigilanceDepartment of Pharmaceutical AnalysisChina Pharmaceutical UniversityNanjing 210009China Institute of Biological and Medical Imaging Helmholtz Zentrum Miinchen and Technische Universitat MiinchenNeuherberg 85764Germany State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics&Center for Molecular Imaging and Translational Medicine School of Public HealthXiamen UniversityXiamen 361005China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Department of Nuclear Medicine Zhongshan Hospital Xiamen UniversityXiamen 361004China Department of Chemistry Bio-Imaging Research CenterUniversity of GeorgiaAthensGeorgia 30602USA

Nan oparticles with effective tumor accumulation and efficient renal clearance have attracted significant interests for clinical *** 2.5 nm tyrosine based carbon dots(TCDs)with phenolic hydroxyl groups on the surface for directly 125I *** 125I labeledpolyethylene glycol(PEG)functionalized TCDs(125I-TCDPEGs)showed excellent radiochemical stability both in vitro and in *** to theenhanced permeability and retentio n effect,these 125I-TCDPEGs demonstrated a tumor accumulatio n around 4%-5%of the injected doseper gram(ID/g)for U87MG,4T1,HepG2 and MCF7 tumor-bearing mice at 1 h ***,the 125I-TCDPEGs also could befast renally excreted,with less than 0.6%ID/g left in the liver and spleen within 24 *** radioactive carb on dots not only can be used forcellular fluorescence imaging due to their intrinsic optical property,but are also effective single photon emission computed tomography(SPECT)imaging agents for *** with their excellent biocompatibility and stability,we anticipate these 125I-TCDPEGs of great potential for earlytumor diagnosis in *** more,our TCDPEGs are also proved to be feasible carriers for other iodine isotopes such as 127I and 131I fordifferent biomedical application.

关键词： radioiodination tyrosine based carbon dots single photon emissionrenal clearance

Effects on Genome Constitution and Novel Cell Wall Formation Caused by the Addition of 5RS Rye Chromosome to Common Wheat

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Journal of Integrative Plant Biology 2008年第4期50卷 503-509页

作者： Zhi-Jun Cheng minoru Murata Sodmergen Xiao-Mei Li Hai nian Jian-min Wan National Key Facility for Crop Gene Resources and Genetic Improvement institute of Crop Science Chinese Academy of Agriculture Science Beijing 100081 China Research/nstitute for Bioresources Okayama University Kurashiki 710-0046 Japan College of Life Science Peking University Beijing 100871 China State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences Beijing 100093 China South China Agncultural University Guangzhou 300098 China

The cytological instability of common wheat-rye addition lines was investigated in the present study. The chromosome numbers of almost all addition lines were considerably stable, but those of CS ＋ 5R were very variable. The rye chromosome added in this line was found to be much shorter than expected. Fluorescent in situ hybridization with 5S rDNA and the centromere-speciflc probes clearly revealed that the short rye chromosome contains only a short arm of chromosome 5R （5RS）. In this line, chromosome numbers of both 5RS and common wheat were changeable. The chromosome numbers ranged from 2n = 36 to 2n = 44 in the cells carrying two 5RS, and ranged from 2n = 31 to 2n = 44 in one 5RS cells. In addition to the chromosome instability, the muIticells wrapped in a sac-like structure were frequently observed in the root meristematic tissues of CS ＋5RS after the enzyme treatment for chromosome preparation. Genomic in situ hybridization with rye DNA as a probe showed that all cells in sacs investigated were at the interphase stage and contained one or two 5RS chromosomes. An electron microscopic analysis revealed that the cells of CS＋5RS, particularly in sacs, have abnormal （irregular and curved） cell walls. These results indicate that 5RS has （a） specific factor（s） influencing the cell wall development as well as the genome stability.

关键词： addition lines cell wall chromosome instability common wheat rye.

Research on FRP bolt-end failure mechanism

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mining Science and Technology 2009年第4期19卷 522-525页

作者： LI Ying-ming MA nian-jie YANG Ke shi Jian-jun School of Energy and Safety Anhui University of Science and Technology Huainan Anhui 232001 China MOE Key Laboratory for Coalmine Safety and High Efficiency mining Anhui University of Science and Technology Huainan Anhui 232001 China School of Resources and Safety China University of Mining and Technology Beijing 100083 China School of Safety Engineering North China University of Science and Technology Beijing 101601 China

Given the fact that FRP bolts for roadway support are often under a certain amount of eccentric load,we studied the problems of failure of FRP bolt-ends using mechanical analysis,numerical simulation and a laboratory experiment to reveal the FRP bolt-end failure *** results show that bolt-end stress increases rapidly,making the maximum stress under an eccentric load to be 5 to 7 times greater than that under a normal load,resulting first in the formation of some fractures at the bolt-end,which then spreads to the entire cross-section of the bolt.

关键词： FRP bolt bolt-end eccentric load failure mechanism