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Chinese Physics Letters 2014年第4期31卷 139-142页

作者： LI Zeng-Peng WU Shao-Quan ZHAO guo-Ping College of Physics and Electronic Engineering Siehuan Normal University Chengdu 610086

We theoretically study the effects of the antiferromagnetic （AF） spin coupling and the interdot Coulomb repulsion on the Kondo effects in serial double quantum dots by means of the slave-boson mean-field approximation. Our results indicate that in the weak coupling regime, the AF spin coupling strengthens the Kondo resonance, while the interdot Coulomb repulsion suppresses them for the equilibrium case. In the non-equilibrium case, the AF spin coupling strengthens the Kondo resonance only when J 〉 2.5TK0, while the interdot Coulomb repulsion does not suppress Kondo peaks. In the strong coupling regime, the bias voltage has no effects on the Kondo resonance in this system, and the AF spin coupling increases the height of Kondo peaks only when J 〈 2.5TK0. However, the inter-dot Coulomb repulsion suppresses the spin Kondo effect, which induces the orbit Kondo effect. Moreover, the relevant underlying physics of these problems are discussed.

关键词： ANTIFERROMAGNETIC resonance SPIN-spin interactions COULOMB potential KONDO effect QUANTUM dots

Research on Key Technologies and Application of Internet of Things

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Research on Key Technologies and Application of Internet of ...

Embedding Periodic Maps on Surfaces into Those on S^3

第25届中国控制与决策会议

作者： Zhen-jun guo Institute of Information and Technology Guilin University of Electronic Technology Graduate University of Chinese Academy of Sciences

ISBN: (纸本)9781467355339

Three partssuch as: EPC middleware, ONS and EPC Information Service were studiedin depthin this *** an EPC Middleware System,an ONS system,an EPC Information Services ystem were designed *** more complete information network system hasbeen established, which providesa platform for "Internet of Things" rapidly extended to the enterprise and information-sharing among *** middleware system isalink between RFID equipmentand enterprise *** provides connections to RFID equipment,puts EPC information into networks,checks EPC, lters EPC,bu ers EPC,*** system nds out the addresses of EPCIS servers through pretreatsintg EPC,and sends the addresses to EPC *** system accesses to the corporate databases,provides externa services for quering item information. Finally in laboratory,a simulation platform was set up , and it veri ed the easibility of *** test results show that EPC middleware, when it’s work parameters has been adjusted according to the environment, can quickly, accurately eliminate redundancy brought along by dumb *** Information Server can accurately, safely return information of items.

关键词： Internet of Things middleware EPC Information Service

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Chinese Annals of Mathematics,Series B 2015年第2期36卷 161-180页

作者： Yu guo Chao WANG Shicheng WANG Yimu ZHANG School of Mathematical Sciences Peking University

Call a periodic map h on the closed orientable surface Σg extendable if h extends to a periodic map over the pair(S3, Σg) for possible embeddings e : Σg→ S3. The authors determine the extendabilities for all periodical maps on Σ2. The results involve various orientation preserving/reversing behalves of the periodical maps on the pair(S3, Σg). To do this the authors first list all periodic maps on Σ2, and indeed the authors exhibit each of them as a composition of primary and explicit symmetries, like rotations, reflections and antipodal maps, which itself should be interesting. A by-product is that for each even g,the maximum order periodic map on Σg is extendable, which contrasts sharply with the situation in the orientation preserving category.

关键词： Symmetry of surface Symmetry of 3-sphere Extendable action

Asymmetric Cationic [P, O] Type Palladium Complexes in Olefin Homopolymerization and Copolymerization

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Chinese Journal of Chemistry 2017年第8期35卷 1209-1221页

作者： Shuoyan Xiong Lihua guo Shumiao Zhang Zhe Liu Key Laboratory of Soft Matter Chemistry Chinese Academy of Sciences Department of Polymer Science and Engineering University of Science and Technology of China Hefei Anhui 230026 China Shool of Chemistry and ChemtcalEngmeermg Qufu Normal University Qufu Shandong 273165 China

Metal-catalyzed ethylene homopolymerization and ethylene-polar monomer copolymerization to produce new kinds of polyolefins with novel microstructures are of great interest. So far, there are some disadvantages for traditional transition metal catalyst systems. Therefore, it is critical to develop new catalysts or alternative strategies. In recent years, some cationic [P, O] palladium complexes have been demonstrated with the abilities to obtain oligomers and the high molecular weight polymers. Most importantly, these complexes showed high activity and generated polymers with specific microstructures when used for copolymerization of ethylene with industrially relevant polar monomers. This review summarizes several types of high performance cationic [P, O] palladium catalysts in ethylene oligomerization, ethylene homopolymerization and the copolymerization of ethylene with polar monomers Specially, the regulation of steric and electronic effects at specific sites of the metal complexes was focused.

关键词： palladium olefin polymerization copolymerization cationic metal center substituent effect

Bare Strange Stars Might Not Be Bare

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Chinese Physics Letters 1998年第12期15卷 934-936页

作者： XU Ren-xin QIAO guo-jun Department of Geophysics Peking UniversityBeijing 100871 Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center Beijing 100871

It is proposed that the bare strange matter stars might not be bare,and the observed pulsars might be in fact the bare strange *** intensely magnetized strange matter stars rotate,the induced unipolar electric fields would be large enough to construct *** situation is very similar to that discussed by many authors for rotating neutron ***,the strange stars with accretion crusts in binaries could act as x-ray pulsars or x-ray *** are some advantages if pulsars are bare strange stars.

关键词： stars crust accretion

Mixed Volumes and Measures of Asymmetry

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Acta Mathematica Sinica,English Series 2014年第11期30卷 1905-1916页

作者： Hai Lin JIN Gang Song LENG Qi guo Department of Mathematics Suzhou University of Science and Technology Department of Mathematics Shanghai University

The mixed volume and the measure of asymmetry for convex bodies are two important topics in convex *** this paper,we first reveal a close connection between the Lp-mixed volumes proposed by *** and the p-measures of asymmetry,which have the Minkowski measure as a special case,introduced by ***,a family of measures of asymmetry is defined in terms of the Orlicz mixed volumes introduced by ***,*** and *** recently,which is an extension of the p-measures.

关键词： Minkowski measure of asymmetry p-measure of asymmetry Lp-mixed volume Orlicz measure of asymmetry Orlicz mixed volume

Sediment transportation and bed morphology reshaping in Yellow River Delta

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Science China(Technological Sciences) 2009年第11期52卷 3382-3390页

作者： KONG QingRong JIANG ChunBo QIN JunJie guo Bin State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China

The Yellow River Delta supports the ecological function as a typical estuarine foreshore wetland. The wetland area is changing greatly every year because of sediment deposition and erosion, which influences the wetland function tremendously. Application of environmental fluid dynamics code (EFDC) to the Yellow River Delta is on the basis of the mobile bed dynamic model and wetting-drying process. Careful calibration is carried out for the numerical model which is set up for the Yellow River Delta, the sediment transport process of the model is compatible to the Yellow River situation. The simulated bed elevation by considering the sediment deposition in the Mouth is particularly focused on, the numerical results are in agreement with the measured bed morphology within 1992 2000. Simulation in this paper indicates that most of the sediment deposited just out of the Mouth which makes the mouth move forward into the sea 2.5 km per year. This paper presents good results in simulation of varying sediment deposition and provides further methods to predict the future morphology and area of the Yellow River Delta.

关键词： sediment morphology environmental fluid dynamics code (EFDC) Yellow River Delta

Stability of the Standing Waves for a Class of Coupled Nonlinear Klein-Gordon Equations

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Acta Mathematicae Applicatae Sinica 2010年第3期26卷 427-442页

作者： Jian Zhang Zai-hui Gan Bo-ling guo College of Mathematics and Software Science Sichuan Normal University Chengdu 610066 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

This paper deals with the standing waves for a class of coupled nonlinear Klein-Gordon equations with space dimension N ≥ 3, 0 〈 p, q 〈 2/N-2 and p ＋ q 〈 4/N. By using the variational calculus and scaling argument, we establish the existence of standing waves with ground state, discuss the behavior of standing waves as a function of the frequency ω and give the sufficient conditions of the stability of the standing waves with the least energy for the equations under study.

关键词： Coupled nonlinear Klein-Gordon equations Stability Standing wave Variational calculus

An Improved Whale Optimization Algorithm for Global Optimization and Realized Volatility Prediction

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Computers, Materials & Continua 2023年第12期77卷 2935-2969页

作者： Xiang Wang Liangsa Wang Han Li Yibin guo School of Civil Engineering and Architecture Zhengzhou University of AeronauticsZhengzhou450015China School of Civil and Architectural Engineering Jiangsu University of Science and TechnologyZhenjiang212003China

The original whale optimization algorithm(WOA)has a low initial population quality and tends to converge to local optimal *** address these challenges,this paper introduces an improved whale optimization algorithm called OLCHWOA,incorporating a chaos mechanism and an opposition-based learning *** algorithm introduces chaotic initialization and opposition-based initialization operators during the population initialization phase,thereby enhancing the quality of the initial whale ***,including an elite opposition-based learning operator significantly improves the algorithm’s global search capabilities during *** work and contributions of this paper are primarily reflected in two ***,an improved whale algorithm with enhanced development capabilities and a wide range of application scenarios is ***,the proposed OLCHWOA is used to optimize the hyperparameters of the Long Short-Term Memory(LSTM)***,a prediction model for Realized Volatility(RV)based on OLCHWOA-LSTM is proposed to optimize hyperparameters *** evaluate the performance of OLCHWOA,a series of comparative experiments were conducted using a variety of advanced *** experiments included 38 standard test functions from CEC2013 and CEC2019 and three constrained engineering design *** experimental results show that OLCHWOA ranks first in accuracy and stability under the same maximum fitness function calls ***,the China Securities Index 300(CSI 300)dataset is used to evaluate the effectiveness of the proposed OLCHWOA-LSTM model in predicting *** comparison results with the other eight models show that the proposed model has the highest accuracy and goodness of fit in predicting *** further confirms that OLCHWOA effectively addresses real-world optimization problems.

关键词： Whale optimization algorithm chaos mechanism opposition-based learning long short-term memory realized volatility

An estimation method of soil wind erosion in Inner Mongolia of China based on geographic information system and remote sensing

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Journal of Arid Land 2015年第3期7卷 304-317页

作者： Yi ZHOU Bing guo ShiXin WANG HePing TAO Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences University of Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chinese Academy of Sciences

Studies of wind erosion based on Geographic Information System（GIS） and Remote Sensing（RS） have not attracted sufficient attention because they are limited by natural and scientific *** studies have been conducted to estimate the intensity of large-scale wind erosion in Inner Mongolia,*** the present study,a new model based on five factors including the number of snow cover days,soil erodibility,aridity,vegetation index and wind field intensity was developed to quantitatively estimate the amount of wind *** results showed that wind erosion widely existed in Inner *** covers an area of approximately 90×104 km2,accounting for 80% of the study *** 1985–2011,wind erosion has aggravated over the entire region of Inner Mongolia,which was indicated by enlarged zones of erosion at severe,intensive and mild *** Inner Mongolia,a distinct spatial differentiation of wind erosion intensity was *** distribution of change intensity exhibited a downward trend that decreased from severe increase in the southwest to mild decrease in the northeast of the *** occupied by barren land or sparse vegetation showed the most severe erosion,followed by land occupied by open *** would have the most dramatic potential for changes in the future because these areas showed the largest fluctuation range of change *** addition,a significantly negative relation was noted between change intensity and land *** relation between soil type and change intensity differed with the content of Ca CO3 and the surface composition of sandy,loamy and clayey soils with particle sizes of 0–1 *** results have certain significance for understanding the mechanism and change process of wind erosion that has occurred during the study ***,the present study can provide a scientific basis for the prevention and treatment of wind erosion in Inner Mongolia.

关键词： wind erosion estimation model soil erodibility snow cover days aridity Inner Mongolia