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Search Results: 1 - 10 of 59120 matches for " Yanbin YANG "
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A MAC Scheme with QoS Guarantee for MANETs  [PDF]
Yanbin YANG, Yulin WEI
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.28088
Abstract: IEEE 802.11 distributed coordination function (DCF) can alleviate the collision and hidden station problem, but it doesn’t differentiate traffic categories (TC). Therefore, it can’t provide sufficient QoS support for different traffic categories. Recently, a new contention-based enhanced distributed channel access (EDCA) scheme was proposed which provides a probabilistic QoS support. In this paper, an adaptive EDCA scheme with QoS guarantee for mobile ad hoc networks (MANETs) is proposed. In this scheme, the EDCA scheme and the token bucket algorithm (TBA) are combined to adjust the contention window (CW). Our scheme provides the traffic differentiation.
The Research on the Appraisal of Market Opportunity Based on AHP  [PDF]
Donghong YANG, Yujie TAN, Yanbin SUN
Journal of Service Science and Management (JSSM) , 2009, DOI: 10.4236/jssm.2009.24033
Abstract: In this article, through analyzing the inner and external environments of the manufacture enterprise, the hierarchy model of the market opportunity has been constructed. Based on the AHP, the mathematics evaluation model of the market opportunity has been established. Take a simulative enterprise as example, according to the hierarchy model and the mathematics evaluation model of the market opportunity, the judgment matrixes of every hierarchy have been established and the weight of each market opportunity opposite to the target hierarchy is obtained. The reasonable decision-making method has been provided to choose the market opportunity for the manufacture enterprise.
Towards Behavior Control for Evolutionary Robot Based on RL with ENN
Jingan Yang,Yanbin Zhuang
IAES International Journal of Robotics and Automation (IJRA) , 2012, DOI: 10.11591/ijra.v1i1.259
Abstract: This paper proposes a behavior-switching control strategy of an evolutionary robotics based on Artificial Neural Network (ANN) and Genetic Algorithms (GA). This method is able not only to construct the reinforcement learning models for autonomous robots and evolutionary robot modules that control behaviors and reinforcement learning environments, and but also to perform the behavior-switching control and obstacle avoidance of an evolutionary robotics (ER) in time-varying environments with static and moving obstacles by combining ANN and GA. The experimental results on the basic behaviors and behavior-switching control have demonstrated that our method can perform the decision-making strategy and parameters set opimization of FNN and GA by learning and can escape successfully from the trap of a local minima and avoid emph{"motion deadlock" status} of humanoid soccer robotics agents, and reduce the oscillation of the planned trajectory between the multiple obstacles by crossover and mutation. Some results of the proposed algorithm have been successfully applied to our simulation humanoid robotics soccer team CIT3D which won emph{the 1st prize} of RoboCup Championship and ChinaOpen2010 (July 2010) and emph{the $2^{nd}$ place} of the official RoboCup World Championship on 5-11 July, 2011 in Istanbul, Turkey. As compared with the conventional behavior network and the adaptive behavior method, the genetic encoding complexity of our algorithm is simplified, and the network performance and the {em convergence rate $ ho$} have been greatly improved.
Could the Magellanic Clouds be tidal dwarves expelled from a past-merger event occurring in Andromeda?
Yanbin YANG,Francois HAMMER
Physics , 2010, DOI: 10.1088/2041-8205/725/1/L24
Abstract: The Magellanic Clouds are often considered as outliers in the satellite system of the Milky Way because they are irregular and gas-rich galaxies. From their large relative motion, they are likely from their first pass near the Milky Way, possibly originating from another region of the Local Group or its outskirts. M31 could have been in a merger stage in its past and we investigate whether or not the Large Magellanic Cloud could have been a tidal dwarf expelled during this event. Such an hypothesis is tested in the frame of present-day measurements and uncertainties of the relative motions of LMC and M31. Our method is to trace back the LMC trajectory using several thousands of different configurations that sample the corresponding parameter space. We find several configurations that let LMC at 50 kpc from M31, 4.3 to 8 Gyrs ago, depending on the adopted shape of the Milky Way halo. For all configurations, the LMC velocity at such a location is invariably slightly larger than the escape velocity at such a radius. The preferred solutions correspond to a spherical to prolate Milky Way halo, predicting a transversal motion of M31 of less than 107 km/s and down to values that are close to zero. We conclude that from present-day measurements, Magellanic Clouds could well be tidal dwarves expelled from a former merger events occurring in M31.
Composite nanowires for room-temperature mechanical and electrical bonding
Yanbin Cui,Yang Ju
Physics , 2015,
Abstract: At millimeter dimension or less, the conventional bonding technology in electronic assembly relies heavily on reflow soldering and suffers from severe performance and reliability degradation. Meanwhile, the traditional high temperature bonding process (easily reach 220 oC) tends to result in undesired thermal damage and residual stress at the bonding interface. It is therefore a major challenge to find a means to preparing room-temperature connectors or fasteners with good mechanical and electrical bonding. Very recently, composite nanowire have been used to fabricate room-temperature fasteners. In this chapter, we summarize the state-of-the-art progress on the use of composite nanowires for room-temperature mechanical and electrical bonding. Using anodic aluminum oxide (AAO) and polycarbonate (PC) membrane as template, the fabrication of Cu/parylene and Cu/polystyrene nanowires were described. Meanwhile, the fabrication of carbon nanotube (CNTs) array was summarized. Then, the performances of the composite nanowires (Cu/parylene, Cu/polystyrene and CNT-Cu/parylene) used as surface fastener for room-temperature mechanical and electrical bonding were demonstrated.
Evaluation on the Consumer Credit in Returns Reverse Logistics
Donghong Yang,Wenyan Duan,Yanbin Sun,Hui Li
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n2p126
Abstract: In buyers’ market, the returns reverse logistics caused by consumer credit can increase the management costs that enterprises spend dealing with the reverse logistics, and it can also cause bad community atmosphere. Based on the consumer's gender, age, education, occasion, position and the average monthly income, this paper establishes index system to evaluate consumer credit and uses Fischer discrimination ? to measure the credit level of consumers, which provides a reference for enterprises to establish a scientific assessment system to evaluate the consumer credit.
The Formation of Large Galactic Disks Through The Hierarchical Scenario: Further consequences
Francois Hammer,Yanbin Yang,Hector Flores,Mathieu Puech
Physics , 2012,
Abstract: Using the deepest and most complete observations of distant galaxies, we investigate the progenitors of present-day large spirals. Observations include spatially-resolved kinematics, detailed morphologies and photometry from UV to mid-IR. Six billions years ago, half of the present-day spirals were starbursts experiencing major mergers, evidenced by their anomalous kinematics and morphologies. They are consequently modeled using hydrodynamics models of mergers and it perfectly matches with merger rate predictions by state-of-the-art-{\Lambda}CDM semi-empirical models. Furthermore imprints in the halo of local galaxies such as M31 or NGC5907 are likely caused by major merger relics. This suggests that the hierarchical scenario has played a major role in shaping the massive galaxies of the Hubble sequence. Linking galaxy properties at different epochs is the best way to fully understand galaxy formation processes and we have tested such a link through generated series of simulations of gas-rich mergers. Mergers have expelled material in galactic haloes and beyond, possibly explaining 60% of the missing baryons in Milky-Way (MW) mass galaxies. A past major merger in M31 might affect drastically our understanding of Local Group galaxies, including MW dwarves. We also propose future directions to observationally constrain the necessary ingredients in galaxy simulations.
The NGC 4013 tale: a pseudo-bulged, late-type spiral shaped by a major merger
Jianling Wang,Francois Hammer,Mathieu Puech,Yanbin Yang,Hector Flores
Physics , 2015, DOI: 10.1093/mnras/stv1531
Abstract: Many spiral galaxy haloes show stellar streams with various morphologies when observed with deep images. The origin of these tidal features is discussed, either coming from a satellite infall or caused by residuals of an ancient, gas-rich major merger. By modelling the formation of the peculiar features observed in the NGC 4013 halo, we investigate their origin. By using GADGET -2 with implemented gas cooling, star formation, and feedback, we have modelled the overall NGC 4013 galaxy and its associated halo features. A gas-rich major merger occurring 2.7-4.6 Gyr ago succeeds in reproducing the NGC 4013 galaxy properties, including all the faint stellar features, strong gas warp, boxy-shaped halo and vertical 3.6 mum luminosity distribution. High gas fractions in the progenitors are sufficient to reproduce the observed thin and thick discs, with a small bulge fraction, as observed. A major merger is able to reproduce the overall NGC 4013 system, including the warp strength, the red colour and the high stellar mass density of the loop, while a minor merger model cannot. Because the gas-rich model suffices to create a pseudo-bulge with a small fraction of the light, NGC 4013 is perhaps the archetype of a late-type galaxy formed by a relatively recent merger. Then late type, pseudo-bulge spirals are not mandatorily made through secular evolution, and the NGC 4013 properties also illustrate that strong warps in isolated galaxies may well occur at a late phase of a gas-rich major merger.
Deviations of Steady States of the Traveling Wave to a Competition Diffusion System with Random Perturbation  [PDF]
Xiaorong Hu, Yanbin Tang
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.35062
Abstract: This paper considers the asymptotic dynamics of steady states to the Lotka-Volterra competition diffusion systems with random perturbations by two-parameter white noise on the whole real line. By the fundamental solution of heat equation, we get the asymptotic fluctuating behaviors near the stable states respectively. That is, near the steady state (u,v)=(0,1), the mean value Eu(x,t) is shifted above the equilibrium u=0 and Ev(x,t) is shifted below the equilibrium v=1. However, near the steady state (u,v)=(1,0), the mean value Eu(x,t) is shifted below the equilibrium u =1 and Eu(x,t)=0.
Influence of Carrier Phase on the Center of Time Gravity of the Ultrashort Pulses

Yang Zhenfeng,Yang Zhenjun,Men Yanbin,

光子学报 , 2006,
Abstract: The relation between the center of time gravity of the ultrashort pulse and the carrier phase was studied by using three kinds of pulses,named Gauss,Hyperbolic Secant and Lorentz pulses.The analytical expressions of the relation between them was deduced.The results show that the carrier phase affects the center of time gravity of the ultrashort pulse seriously when the pulsed width is shorter than the optical oscillation duration.
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