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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 498-506页

作者： ming yue Linjiu Wang Teng Ma School of Automotive Engineering Dalian University of Technology State Key Laboratory of Robotics and System Harbin Institute of Technology

Wheeled mobile robots(WMRs) encounter unavoidable slippage especially on the low adhesion terrain such that the robots stability and accuracy are reduced *** overcome this drawback,this article presents a neural network(NN) based terminal sliding mode control(TSMC) for WMRs where an augmented ground friction model is reported by which the uncertain friction can be estimated and compensated according to the required *** contrast to the existing friction models,the developed augmented ground friction model corresponds to actual fact because not only the effects associated with the mobile platform velocity but also the slippage related to the wheel slip rate are concerned ***,the presented control approach can combine the merits of both TSMC and radial basis function(RBF) neural networks techniques,thereby providing numerous excellent performances for the closed-loop system,such as finite time convergence and faster friction estimation *** results validate the proposed friction model and robustness of controller;these research results will improve the autonomy and intelligence of WMRs,particularly when the mobile platform suffers from the sophisticated unstructured environment.

关键词： Ground friction radial basis function(RBF) neural network(NN) slippage effect terminal sliding mode control(TSMC) wheeled mobile robot(WMR)

Tunable Adsorption and Desorption of Hydrogen Atoms on Single-Walled Carbon Nanotubes

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Chinese Physics Letters 2002年第10期19卷 1498-1500页

作者： Zhao ming-Wen, Xia yue-Yuan Department of Physics Shandong University Department of Optoelectronics Shandong University

Chemical adsorption and desorption of hydrogen atoms on single-walled carbon nanotubes (SWNTs) are investigated by using molecular dynamics simulations. It is found that the adsorption and desorption energy of hydrogen atoms depend on the hydrogen coverage and the diameter of the SWNTs. Hydrogen-adsorption geometry at the coverage of 1.0 is more energetically stable. The adsorption energy decreases with the increasing diameter of the armchair tubes. The adsorption and desorption energy of hydrogen atoms can be modified reversibly by externally radial deformation. The averaged C-H bond energy on the high curvature sites of the deformed tube increases with increasing radial deformation, while that on the low curvature sites decreases

关键词： Molecular dynamics

Magnetically recyclable Sm2Co17/Cu catalyst to chemoselectively reduce the 3-nitrostyrene into 3-vinylaniline under room temperature

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Nano Research 2019年第12期12卷 3085-3088页

作者： Zhenhui Ma Hu Liu ming yue College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

Using non-noble metal catalysts to chemoselectively reduce the 3-nitrostyrene into 3-vinylaniline is extremely attractive due to the importantapplications of aromatic ***,the separation and recycle of catalytic particles to sustainably catalyze are still challenging on accountof their small *** this communication,we report a novel magnetically recyclable catalyst of Sm2Co17/Cu to chemoselectively reduce3-nitrostyrene into 3-vinylaniline by activating ammonia borane(AB)to yield *** Sm2Co17/Cu,composited of 180 nm Sm2Co17nano magnet and 10 nm Cu catalyst nano particles,shows a high conversi on(98%)and a high selectivity(99%)for 3-nitrostyrene under ultrasonic *** importantly,they are easily collected by self-separation method without any magnetic *** a consequenee,the excellent recyclable feature is acquired even underwent 10 *** approach provides a green strategy to synthesize magneticallyrecyclable catalysts.

关键词： Sm2Co17/Cu chemoselective catalysis 3-nitrostyrene magnetic recycle

THE ROLE FORE AIR FLOW IN SOIL SLOPE STABILITY ANALYSIS

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Journal of Hydrodynamics 2009年第5期21卷 640-646页

作者： ZHANG Xiao-yue ZHU yue-ming FANG Chun-hui College of Water Conservancy and Hydropower Engineering Hohai University Nanjing 210098 China

In order to investigate the effect of the pore air flow in the soil slope stability analysis, a water-air two-phase flow model, based on the multi-phase flow theory, is proposed and with the model, the water-phase and air-phase seepages of the soil slope in the stable seepage and rainfall situations are simulated. The soil slope safety coefficients are obtained according to the simulated pore air pressure and pore water pressure. The calculation results show that in the stable seepage situation, the influence of the pore air pressure on the soil slope stability can be neglected, while in the rainfall situation, the pore air pressure generated in the unsaturated zone will reduce the safety coefficient, and the larger the distance between the slip surface and the underground water level is, the greater the influence of the pore air pressure on the soil slope stability will be.

关键词： unsaturated soil water-air two-phase flow rainfall slope stability

On Real-rootedness of Independence Polynomials of Rooted Products of Graphs

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Acta Mathematicae Applicatae Sinica 2023年第4期39卷 854-867页

作者： Aria ming-yue ZHU Bao-xuan ZHU School of Mathematics and Statistics Jiangsu Normal UniversityXuzhou 221116China

An independent set in a graph G is a set of pairwise non-adjacent vertices. The independence polynomial of G is the polynomial AΣx^(|A|), where the sum is over all independent sets A of G. In 1987, Alavi,Malde, Schwenk and Erd os conjectured that the independence polynomial of any tree or forest is *** this unimodality conjecture has attracted many researchers’ attention, it is still open. Recently, Basit and Galvin even asked a much stronger question whether the independence polynomial of every tree is ordered log-concave. Note that if a polynomial has only negative real zeros then it is ordered log-concave and *** this paper, we observe real-rootedness of independence polynomials of rooted products of graphs. We find some trees whose rooted product preserves real-rootedness of independence polynomials. In consequence, starting from any graph whose independence polynomial has only real zeros, we can obtain an infinite family of graphs whose independence polynomials have only real zeros. In particular, applying it to trees or forests, we obtain that their independence polynomials are unimodal and ordered log-concave.

关键词： independence polynomials unimodality real zeros rooted products claw-free graphs

Geodesic acoustic modes in tokamak plasmas with anisotropic distribution and a radial equilibrium electric field

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Plasma Science and Technology 2018年第8期20卷 16-21页

作者： yue ming Deng ZHOU Wenjia WANG Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 People's Republic of China University of Science and Technology of China Hefei 230026 People's Republic of China Center for Magnetic Fusion Theory Chinese Academy of Sciences Hefei 230031 People's Republic of China

The dispersion relation of standard geodesic acoustic modes in tokamak plasmas with anisotropic distribution and a radial equilibrium electric field is derived and analyzed. Both frequencies and damping rates increase with respect to the poloidal Mach number which indicates the strength of the radial electric field. The strength of anisotropy is denoted by the ratio of the parallel temperature（T_‖） to the perpendicular temperature（T_⊥）. It is shown that, when the parallel temperature is lower than the perpendicular temperature, the enhanced anisotropy tends to enlarge the real frequency but reduces the damping rate, and when the parallel temperature is higher than the perpendicular temperature, the effect is opposite. The radial equilibrium electric field has stronger effect on the frequency and damping rate for the case with higher parallel temperature than the case with higher perpendicular temperature.

关键词： geodesic acoustic mode anisotropy equilibrium flow

Periodic oscillation and fine structure of wedge-induced oblique detonation waves

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Acta Mechanica Sinica 2011年第6期27卷 922-928页

作者： ming-yue Gui Bao-Chun Fan Gang Dong State Key Laboratory of Transient Physics Nanjing University of Science and Technology 210094 Nanjing China State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology 100081 Beijing China

An oblique detonation wave for a Mach 7 inlet flow over a long enough wedge of 30 turning angle is simulated numerically using Euler equation and one-step rection *** fifth-order WENO scheme is adopted to capture the shock *** numerical results show that with the compression of the wedge wall the detonation wave front structure is divided into three sections：the ZND model-like strcuture,single-sided triple point structure and dual-headed triple point *** first structure is the smooth straight,and the second has the characteristic of the triple points propagating dowanstream only with the same velocity,while the dual-headed triple point structure is very *** detonation waves facing upstream and downstream propagate with different velocities,in which the periodic collisions of the triple points cause the oscillation of the detonation wave *** oscillation process has temporal and spatial *** addition,the triple point trace are recorded to obtain different cell structures in three sections.

关键词： Oblique detonation wave Wedge - Periodic oscillation Fine structure

Novel disjoint path selection scheme based on link availability in ASON

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The Journal of China Universities of Posts and Telecommunications 2007年第3期14卷 70-73页

作者： WANG Xian-qing LU yue-ming JI yue-feng Key Laboratory of Optical Communication and Lightwave Technologies Ministry of Education Beijing University of Posts and TelecommunicationsBeijing 100876 China

Risk-disjoint routing is an efficient way to improve network survivability. In this article, a partial risk-disjoint routing algorithm based on link availability （PRDRA-LA） is proposed based on the complete risk-disjoint routing algorithm （CRDRA）. While calculating the protection path with PRDRA-LA, the links that share risks with the links in the working path are filtered by link availability. In addition, the risk disjoint degree between the protection path and the working path can be adjusted freely. Simulation results showed that when compared with CRDRA, routing connections with PRDRA-LA can achieve improved survivability while the number of connections that can be successfully routed over the current network is kept from serious decline.

关键词： automatically switched optical network risk- sharing links partial risk-disjoint routing algorithm based on link availability risk-disjoint degree

Effects of Some Neurobiological Factors in a Self-organized Critical Model Based on Neural Networks

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Communications in Theoretical Physics 2005年第1X期44卷 155-159页

作者： ZHOULi-ming ZHANGYing-yue CHENTian-Lun DepartmentofPhysics NankaiUniversityTianjin300071China

Based on an integrate-and-fire mechanism, we investigate the effect of changing the efficacy of the synapse,the transmitting time-delayed, and the relative refractoryperiod on the self-organized criticality in our neu... 详细信息

关键词：生物因素自体组织临界模型神经网络神经原时间延迟

Supporting multi-user real-time VBR video service using dynamic bandwidth management based on prediction

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 64-71页

作者： XU Zhi-yuan LI Hui LU yue-ming JI yue-feng Key Laboratory of Optical Communications and Lightwave Technologies Beijing University of Posts and Telecommunications Beijing 100876 China

Real-time variable bit rate（VBR） video is expected to take a significant portion of multimedia ***,plentiful challenges to VBR video service provision have been raised for its characteristic of high traffic *** support multi-user real-time VBR video transmission with high bandwidth utilization and satisfied quality of service（QoS）,this article proposes a practical dynamic bandwidth management *** scheme forecasts future media rate of VBR video by employing time-domain adaptive linear predictor and using media delivery index（MDI） as both QoS measurement and complementary management *** addition,to support multi-user application,an adjustment priorities classified strategy is also put ***,a test-bed based on this management scheme is *** experimental results demonstrate that the scheme proposed in this article is efficient with bandwidth utilization increased by 20%-60% compared to a fixed service rate and QoS guaranteed.

关键词： dynamic bandwidth management MDI QoS real-time time-domain adaptive linear predictor VBR video