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An experimental setup with controllable tuning parameters for studying the Kondo systems

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Science China(Physics,Mechanics & Astronomy) 2022年第4期65卷 121-122页

作者： zhong-yi Lu Department of Physics Renmin University of ChinaBeijing 100872China

The Kondo physics has been studied since the 1960 s in condensed matter physics[1,2],which is mainly determined by two competing factors namely the Kondo effect and the Ruderman-Kittel-Kasuya-Yosida(RKKY)interaction.

关键词： interaction Kondo condensed

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A survey on intelligence approaches that may be useful for information and communication technology research

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 1-5,17页

作者： zhong yi-xin School of Information Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

The concepts on information and communication technology （ICT） and ＂intelligence＂ are defined firstly and the analyses on the environment and requirements for ICT are then followed. Based on the definitions and the analyses, a survey on intelligence approaches that may be useful for ICT is thus made. The conclusion drawn from the survey is a recommendation by saying that intelligence approaches have been one of the keys for further development of the entirety of ICT and therefore should receive much more attentions from ICT researchers in the years to come.

关键词： uncertainty complexity intelligence approaches,ICT

A Review of Chitin Solvents and Their Dissolution Mechanisms

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Chinese Journal of Polymer Science 2020年第10期38卷 1047-1060,I0004页

作者： yi zhong Jie Cai LiNa Zhang Cllege ofChemistry&Molecule Sciences Wuhan UniversityWuhan 430072China Hubei Engineering Center of Natural Polymer based Medical Materlals Wuhan University Wuhan 430072 China Research Institute ofShenzhen Wuhan UniversityShenzhen 518057China

Chitin is an abundant natural nitrogen-containing biopolymer with great application potential in materials,environment,energy,and ***,the structure characteristics and processing technologies have required intense research in related *** particular,there have been great efforts to developing solvents for chitin,and the results s0 far are quite *** review summarizes the main solvent systems used for chitin,namely the aqueous solvent systems(mineral acids,inorganic salt aqueous solutions,alkali aqueous solutions)and non aqueous ones(LiCl-dimethylacetamide solvents,CaCl22H2O saturated methanol,ionic liquids,deep eutectic solvents,and protic organic solvents).The solvent properties,dissolution methods,and solution properties are discussed in *** attention is paid to the dissolution mechanism in each *** review can provide a reference for understanding the dissolution behavior of chitin and finding suitable solvents for it.

关键词： Chitin Solvents Dissolution mechanism Hydrogen bonding

Localization of q-form fields on a de Sitter brane in chameleon gravity

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Frontiers of physics 2024年第3期19卷 11-18页

作者： yi zhong Tao-Tao Sui School of Physics and Electronics Science Hunan UniversityChangsha 410082China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu Provinceand Key Laboratory of Quantum Theory and Applications of MoELanzhou UniversityLanzhou 730000China College of Physics Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Recently,it was found that the vector field can be naturally localized on the thick brane in chameleon *** this work,we extend this study to encompass de Sitter brane *** focus on the localization of q-form *** scalar and vector fields can be localized on the de Sitter brane,while the KR field cannot be *** condition for localization of the scalar and vector fields is ***,we investigate the localization characteristics in two examples with given conformal factor b(ϕ).In the first case,the effective potentials and KK modes of the matter fields are obtained asymmetric even though the de Sitter brane has Z2 *** the second case,volcano-like effective potentials are generated in the de Sitter brane model.

关键词： brane q-form field chameleon gravity

Bio-inspired vibrational wireless underground communication system

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第4期14卷 1042-1051页

作者： yi zhong Junliang(Julian)Tao Center for Bio-mediated and Bio-inspired Geotechnics School of Sustainable Engineering and the Built EnvironmentArizona State UniversityTempeAZ85287USA

The internet of the underground things(IoUT)is an emerging field that concerns connected underground sensing nodes and can find applications in various fields such as geotechnical engineering,precision agriculture,and search and rescue *** complex underground environment and multiphase nature of the soil pose challenges to wireless underground *** existing studies on wireless underground communication focus on the use of electromagnetic ***,as a highly lossy material for electromagnetic waves,soil can limit the range and reliability of data *** by subterranean animals that rely on vibrations or seismic waves for underground communication,the prototype system developed in this study is based on *** system includes a bioinspired vibrating source,a micro-electromechanical system(MEMS)accelerometer,a microcontroller,and a set of algorithms for encoding and decoding ***,the mole ratsinspired source is small in size,low in cost,and *** on-off-keying decoding algorithm enhanced with an error-correction algorithm is found to be robust in transmitting textual and imaginary *** the current design,a maximum transmission bit rate of 16e17 bits per second and a transmission distance of 80 cm can be *** bit error ratio is as low as 0.1%,demonstrating the robustness of the *** performance of the developed system shows that seismic waves produced by vibration can be used as an information carrier and can potentially be implemented in the IoUT.

关键词： Bio-inspired vibration Underground communication Seismic wave Wireless communication Internet of underground things(IoUT)

Heat engines of the Kerr-AdS black hole

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Communications in Theoretical Physics 2023年第12期75卷 129-137页

作者： yi zhong Yun-Zhi Du School of Physics and Electronics Hunan UniversityChangsha 410082China Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

In this paper,we investigate three types of heat engines for the rotating Kerr-Anti de Sitter(Kerr-AdS)black *** first briefly review the thermodynamics and phase structure of the Kerr-AdS black hole and obtain the phase structure in the T-S *** thermal stability of Kerr-AdS black holes,along with their dependence on various parameters,is thoroughly ***,by utilizing the phase diagram,we consider three types of heat engines:the maximal Carnot engine,Stirling engine,and Rankine *** calculate both the work and efficiency for these *** results indicate that angular momentum has a significant influence on these heat engines.

关键词： black hole heat engine Kerr-AdS

Forgetting and small G protein Rac

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Protein & Cell 2010年第6期1卷 503-506页

作者： yichun Shuai yi zhong School of Life Sciences Tsinghua UniversityBeijing 100084China Cold Spring Harbor Laboratory Cold Spring HarborNY 11724USA

It is far from understood why we forget things that are known to us seconds *** evidence emphasizes that small G protein Rac could be a key to understanding this type of rapid early memory *** current perspective article will first review these studies and then discuss their implications for the internal processes underlying forgetting.

关键词： forget getting Rac

TAILORED FINITE CELL METHOD FOR SOLVING HELMHOLTZ EQUATION IN LAYERED HETEROGENEOUS MEDIUM

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Journal of Computational Mathematics 2012年第4期30卷 381-391页

作者： zhong-yi Huang Xu Yang Department of Mathematical Sciences Tsinghua University Beijing 100084 China Department of Mathematics Courant Institute of Mathematical Sciences New York UniversityNew York NY 10012 USA

In this paper, we propose a tailored finite cell method for the computation of two- dimensional Helmholtz equation in layered heterogeneous medium. The idea underlying the method is to construct a numerical scheme based on a local approximation of the solution to Helmholtz equation. This provides a computational tool of achieving high accuracy with coarse mesh even for large wave number （high frequency）. The stability analysis and error estimates of this method are also proved. We present several numerical results to show its efficiency and accuracy.

关键词： Tailored finite cell method Helmholtz equation Heterogeneous media Som-merfeld condition.

Variable Selection for the Partial Linear Single-Index Model

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Acta Mathematicae Applicatae Sinica 2017年第2期33卷 373-388页

作者： Wu WANG zhong-yi ZHU Department of Statistics School of Management Fudan University Shanghai 200433 China

In this paper, we consider the issue of variable selection in partial linear single-index models under the assumption that the vector of regression coefficients is sparse. We apply penalized spline to estimate the nonparametric function and SCAD penalty to achieve sparse estimates of regression parameters in both the linear and single-index parts of the model. Under some mild conditions, it is shown that the penalized estimators have oracle property, in the sense that it is asymptotically normal with the same mean and covariance that they would have if zero coefficients are known in advance. Our model owns a least square representation, therefore standard least square programming algorithms can be implemented without extra programming efforts. In the meantime, parametric estimation, variable selection and nonparametric estimation can be realized in one step, which incredibly increases computational stability. The finite sample performance of the penalized estimators is evaluated through Monte Carlo studies and illustrated with a real data set.

关键词： nonparametric link function SCAD penalty semiparametric model spline estimation variable selection