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Frontiers of Information Technology & Electronic Engineering 2019年第2期20卷 141-151页

作者： Panati SUBBASH Kil To chong Department of Electronics and Information Engineering Chonbuk National University Advanced Electronics and Information Research Center Chonbuk National University

Autonomous navigation of a mobile robot in an unknown environment with highly cluttered obstacles is a fundamental issue in mobile robotics research. We propose an adaptive network fuzzy inference system(ANFIS) based navigation controller for a differential drive mobile robot in an unknown environment with cluttered obstacles. Ultrasonic sensors are used to capture the environmental information around the mobile robot. A training data set required to train the ANFIS controller has been obtained by designing a fuzzy logic based navigation controller. Additive white Gaussian noise has been added to the sensor readings and fed to the trained ANFIS controller during mobile robot navigation, to account for the effect of environmental noise on sensor readings. The robustness of the proposed navigation controller has been evaluated by navigating the mobile robot in three different environments. The performance of the proposed controller has been verified by comparing the travelled path length/efficiency and bending energy obtained by the proposed method with reference mobile robot navigation controllers, such as neural network, fuzzy logic, and ANFIS. Simulation results presented in this paper show that the proposed controller has better performance compared with reference controllers and can successfully navigate in different environments without any collision with obstacles.

关键词： Adaptive network fuzzy inference system Additive white Gaussian noise Autonomous navigation Mobile robot

When thermoelectric materials come across with magnetism

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Rare Metals 2021年第4期40卷 752-766页

作者： Chen-Chen Zhao chong Xiao Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China

Nowadays,thermoelectric materials have attracted a lot of attention as they can directly convert heat into electricity and vice ***,while strenuous efforts have been made,those conventional strategies are still inevitably going to meet their performance optimization *** this reason,brand new strategies are badly needed to achieve further ***,the roles played by magnetism in recent advances of thermoelectric optimization are ***,magnetic thermoelectric materials can just be treated like other normal materials because the use of universal optimization strategies can still get good ***,it is not a situation which is all or nothing and the tactics of using magnetism for thermoelectric optimization can coexist with other ***,through magnetic doping,we can introduce and adjust magnetism in materials for further *** provides more possibilities in thermoelectric optimization as it can directly influence the spin states in ***,in the form of magnetic secondphase nanoclusters,magnetism can be introduced to thermoelectric materials to conquer the dilemma that the solid solubility of many magnetic ions in thermoelectric materials is too low to have any significant effect on thermoelectric ***,when exposed to an external magnetic field,topological materials can rely on its unique band structures to optimize.

关键词： Thermoelectricity Magnetic thermoelectric materials Magnetism Magnetic doping Magnetic second phase

Dynamic flight stability of a model dronefly in vertical flight

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Acta Mechanica Sinica 2014年第6期30卷 828-838页

作者： chong Shen Mao Sun Institute of Fluid Mechanics Beijing University of Aeronautics & Astronautics

The dynamic flight stability of a model dronefly in hovering and upward flight is *** method of computational fluid dynamics is used to compute the stability derivatives and the techniques of eigenvalue and eigenvector used to solve the equations of *** major finding is as *** flight of the model dronefly is unstable because of the existence of an unstable longitudinal and an unstable lateral natural mode of *** flight of the insect is also unstable,and the instability increases as the upward flight speed *** force generated by the upward flight velocity coupled with the disturbance in pitching angular velocity is responsible for the enhancement of the instability.

关键词： Insect vertical flight Flight stability Natural modes of motion

A KIND OF MULTIVARIATE NURBS SURFACES

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Journal of Computational Mathematics 2004年第1期22卷 137-144页

作者： Ren-HongWang chong-JunLi InstituteofMathematicalSciences DalianUniversityofTechnologyDalian116024China

The purpose of this paper is to construct a kind of multivariate NURBS surfaces by using the bivariate B-splines in the space S1/2(Δmn^(2) and discuss some properties of this kind of NURBS surfaces with multiple knot... 详细信息

关键词： Bivariate B-spline Type-2 triangulationΔ_(mn)~((2)) NURBS surfaces

MIL-100(Fe)-based functional materials for water decontamination: A state of the art review

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Progress in Natural Science:Materials International 2023年第4期33卷 386-406页

作者： Hongyu Chu chong-Chen Wang School of Environment and Energy Engineering Beijing University of Civil Engineering and Architecture Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation

Iron-based metal-organic frameworks(MOFs) have been received extensive attentions over the past years due to the low biotoxicity, multi-function, and wide applications. MIL-100(Fe) bearing unique structure has become the most popular Fe-based MOF up to now, and it is well-recognized as desirable environmental function material,especially for water purification. To provide systematic insight into MIL-100(Fe) for oriented design of novel materials, we review the recent progress and characteristics of MIL-100(Fe)-based materials, including MIL-100(Fe)-based composites, derivatives, and monoliths for water decontamination via adsorption, separation,and advanced oxidation processes(AOPs). Based on existing challenges and limitations discussed in this review,we further propose the future perspectives of MIL-100(Fe)-based materials for sustainable application in water remediation.

关键词： MIL-100(Fe) Water purification Adsorption Separation Advanced oxidation process

Editorial for special issue on mitigating the impacts of mining

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1007-1008页

作者： chong-chong Qi Andy Fourie Qiu-song Chen Ryan Veenstra School of Civil Environmental and Mining EngineeringUniversity of Western AustraliaCrawley WA 6009Australia School of Resources and Safety Engineering Central South UniversityChangsha 410083China Newmont Corporation Subiaco WA 6008Australia

Dear readers,A special issue(SI)entitled"Mitigating the Impacts of Mining"has been successfully organized at International Journal of Minerals,Metallurgy and Materials(IJMMM).The primary reason for this SI lies in that this topic is gaining increasing attentions worldwide.A collection of high-quality papers will contribute to the sustainable development of the mining industry.

关键词： mining entitled collection

Non-existence of KAM Torus

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Acta Mathematica Sinica,English Series 2011年第2期27卷 397-404页

作者： chong Qing CHENG Department of Mathematics Nanjing University Nanjing 210093 P. R. China

Given an integrable Hamiltonian ho with n-degrees of freedom and a Diophantme trequency ω, then, arbitrarily close to h0 in the C^r topology with r 〈 2n, there exists an analytical Hamiltonian he with no KAM torus o... 详细信息

关键词： KAM theory minimal invariant measure α-function

Topcolor Assisted Technicolor Models and Single Top Quark Production via at the Tevatron

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Communications in Theoretical Physics 2001年第7期36卷 53-60页

作者： YUE chong-Xing College of Physics and Information Engineering Henan Normal University Xinxiang 453002 China

TC2 theory predicts a number of new particles including gauge bosons, technipions and top-pions. In this paper, we study and calculate the corrections of all these new particles to single top-quark production rate via the process at the Fermilab Tevatron. Our results show that the correction mainly comes from the virtual effect of the top-pions. With reasonable value of the parameters, the relative correction is larger than 15% which may be detected at the Tevatron RunII or RunIII.

关键词： single top-quark production gauge bosons technipions top-pions cross section

Comparative studies on Zn_(0.95)Co_(0.05)O thin films on C- and R-sapphire substrates

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Chinese Physics B 2009年第12期18卷 5501-5506页

作者：彭英姿 Thomas Liew Song Wen-Dong chong Tow chong Data Storage Instit u re DSI Building 5 Engineering Drive 1 Singapore 117608 Electrical and Computer Engineering Department National University of Singapore Singapore 119260 School of Science Hangzhou Dianzi University Hangzhou 310018 China

Zn0.95Co0.05O precipitate-free single crystal thin films were synthesized by a dual beam pulsed laser deposition method. The films form a wurtzite structure whose hexagonal axis is perpendicular or parallel to the plane of the surface depending on the C-plane （0001） or R-plane （1120） sapphire substrate. Based on the results of high-resolution transmission electron microscopy and x-ray diffraction, C-plane films show larger lattice mismatch. The films exhibit magnetic and semiconductor properties at room temperature. The coercivity of the film is about 8000 A/m at room temperature. They are soft magnetic materials with small remanent squareness S for both crystal orientations. There is no evidence to show that the anisotropy is fixed to the hexagonal axis （C-axis） for the wurtzite structure.

关键词： Co-doped ZnO thin films diluted magnetic semiconductor anisotropy

Qualitative Analyses of Correlations between Strong Ground Motions of the Three Large Earthquakes and Landslide Distributions

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Journal of Earth Science 2023年第2期34卷 369-380页

作者： Yuzhu Bai chong Xu Institute of Geology China Earthquake AdministrationBeijing 100029China National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing 100085China

In this work,the correlations between spatial distributions of landslide point density(LPD)and strong ground motions of the three strong earthquakes are qualitatively *** the qualitative relationship between the distribution of LPD and the fault rupture process is also *** strong events are the Lushan,Wenchuan,and Jiuzhaigou *** order to reconstruct the near filed strong ground motions and the fault processes of these earthquakes,the broadband ground simulation method of University of California Santa Barbara(UCSB)and the simplified crustal layer structures are *** show the rationality of the UCSB method,the fault slip distributions of the three earthquakes reconstructed by the kinematic rupture generator model in the UCSB method are compared with those by ***,the validation of the UCSB method for the three earthquakes is also carried according to the validation exercise of the Southern California Earthquake Center(SCEC)Broadband Platform(BBP).Lastly,the fields of peak ground acceleration(PGA)and peak ground velocity(PGV)in three mutually perpendicular directions of the three earthquakes are ***,the landslide distribution length of large LPD values along the fault strike is less than the fault strike ***,the slip modes of earthquake faults affect the distributions of *** the strike slip earthquakes,the distributions of large LPD values relate well to PGA and PGV components of the parallel and normal to the fault *** the reverse slip earthquakes,distributions of LPD relate to ground motion components in all ***,distributions of landslides in near fields of earthquakes are significantly affected by the focus parameters and fault scales.

关键词： Lushan earthquake Wenchuan earthquake Jiuzhaigou earthquake landslide ground motions engineering geology