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Efective Object Identification and Association by Varying Coverage Through RFID Power Control

Journal of Computer Science & Technology 2014年第1期29卷 4-20页

作者： Shung han Cho Kyung hoon Kim Sangjin Hong IEEE System LSI Business Samsung Electronics Department of Electrical and Computer Engineering Stony Brook University

This paper presents an effective power scheduling strategy for energy efficient multiple objects identification and association. The proposed method can be utilized in many heterogeneous surveillance systems with visual sensors and RFID （radio-frequency identification） readers where energy efficiency as well as association rate are critical Multiple objects positions and trajectory estimates are used to decide the power level of RFID readers. Several key parameters including the time windows and the distance separations are defined in the method in order to minimize the effects of RFID coverage uncertainty. The power cost model is defined and incorporated into the method to minimize energy consumption and to maximize association performance. The proposed method computes the power cost using the range of the outermost position for possible single association and group associations at every sampling time. An RFID reader is activated with the proper coverage range when the power cost for the current time is lower than the power cost for the next time sample. The simplicity of the power cost model relieves the problematic combinatorial comparisons in multiple object cases. The performance comparison simulation with the minimum and maximum energy consumption shows that the proposed method achieves fast single associations with less energy consumption. Finally, the realistic comparison simulation with the fixed range RFID readers demonstrates that the proposed method outperforms the fixed ranges in terms of single association rate and energy consumption.

关键词： object association RFID power control power scheduling visual sensor collaboration

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Optimal Sales Promotion in a Supply Chain Using Consignment Contract under Stochastic Demand

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Journal of Systems Science and Systems Engineering 2022年第4期31卷 414-436页

作者： Ruotong Wang Jianbin Li han Xu Bin dai School of Management Huazhong University of Science&TechnologyWuhan430074China School of Economics and Management Wuhan UniversityWuhan430072China

Sales promotion is getting more and more prosperous in Chinese cross-border e-commerce platforms where the demand is ***,most existing literature on promotion strategies is focusing on deterministic *** this paper,we propose a game-theoretical model under multiplicative stochastic demand to investigate the pricing,inventory quantity and sales promotion strategies for a supply chain which is consisted of one cross-border distributor and one capital-constrained retailer under a consignment *** obtain the equilibrium outcomes under stochastic demand,and find that the optimal price and promotion investment depend on demand uncertainty under endogenous inventory *** exogenous unlimited inventory,the retailer prefers owing promotion right when the elasticity of price and promotion is small enough and its capital is sufficient,while the distributor always prefers to control sales *** endogenous inventory quantity,the sensitivity of demand to price is influence by the demand *** retailer prefers to decide the promotion when the price-elasticity is small,while the distributor prefers to decide the promotion under large *** the intensity of optimal sales promotion made by retailers may be stronger than that when the distributor owns the promotion right,which depends on the elasticity of price and *** importantly,it is always better for consumers when the distributor reserves the promotion right as a lower optimal retailing price is offered.

关键词： Supply chain management pricing strategy promotion decisions consignment contract revenue sharing

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The Nonlinear Schrdinger Equations with Combined Nonlinearities of Power-Type and Hartree-Type

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Chinese Annals of Mathematics,Series B 2011年第3期32卷 435-474页

作者： Daoyuan FANG Zheng han Jialing dai Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematics The University of the Pacific Stockton CA 95211 USA

The primary goal of this paper is to present a comprehensive study of the nonlinear Schrodinger equations with combined nonlinearities of the power-type and Hartreetype. Under certain structural conditions, the authors are able to provide a complete picture of how the nonlinear Schrodinger equations with combined nonlinearities interact in the given energy space. The method used in the paper is based upon the Morawetz estimates and perturbation principles.

关键词： Global well-posedness Scattering blowup Morawetz estimates Perturbation principles

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The Influence of Different Solar System Planetary Ephemerides on Pulsar Timing

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Research in Astronomy and Astrophysics 2024年第8期24卷 85-99页

作者： Jian-Peng dai Wei han Na Wang School of Physical Science and Technology Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China

Pulsar timing offers a comprehensive avenue for exploring diverse topics in physics and *** solar system planetary ephemeris is crucial for pulsar timing as it provides the positions and velocities of solar system planets including the ***,it is inevitable that inherent inconsistencies exist in these *** between various ephemerides can significantly impact pulsar timing and parameter ***,pulsar timing highly depends on the JPL DE ephemeris,for instance,the Pulsar Timing Array data analysis predominantly utilizes *** this study,we examine inconsistencies across various ephemeris series,including JPL DE,EPM,and ***,discrepancies emerge particularly between the current ephemeris DE436 and the earliest released ephemeris DE200,as well as the most recent ephemerides,e.g.,DE440,INPOP21A,and *** detailed analysis of the effects of ephemeris on geometric correction procedures for the conversion of measured topocentric times of arrival is presented in this *** researches reveal that variations in the Roemer delays across different ephemerides lead to distinct *** timing residuals and the fact that these discrepancies can be readily incorporated into the subsequent pulsar parameters,leading to inconsistent fitting estimates,suggest that the influence of errors in the ephemeris on the timing process might currently be underappreciated.

关键词： (stars)pulsars general-Planetary Systems-time-ephemerides

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The Mechanics and Trajectory Control in Locust Jumping

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Journal of Bionic Engineering 2013年第2期10卷 194-200页

作者： Longbao han Zhouyi Wang Aihong Ji Zhendong dai Institute of Bio-Inspired Structure and Surface Engineering Nanjing University of Aeronautics and Astronauties Nanjing 210016 P. R. China China International Engineering Consulting Corporation Beijing 100048 P. R. China

Locusts （Locusta migratoria manilensis） are characterised by their flying ability and abiding jump ability. Research on the jumping mechanics and behavior of locusts plays an important role in elucidating the mechanism of hexapod locomotion. The jump gestures of locusts were observed using high-speed video camera at 250 fps. The reaction forces of the hindlegs were measured using two three-dimensional sensors, in case the two hindlegs attached on separated sensor plates. The jump gestures and reaction forces were used to illustrate the locust jumping mechanism. Results show that the trajectory control is achieved by rapid rolling and yawing movements of the locust body, caused by the forelegs, midlegs and hindlegs in different jumping phases. The final jump trajectory was not determined until hind tarsi left platform. The horizontal co-impulse between two hindlegs might play a key role in jump stability and accuracy. Besides, the angle between two hindlegs affects the control of jump trajectory but has a little effect on the elevation angle of a jump, which is controlled mechanically by the initial position of the hindlegs. This research lays the groundwork for the probable design and development ofbiomimetic robotics.

关键词： locust hindleg reaction force elevation angle jump trajectory

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Lanthanum incorporated in MCM-41 and its application as a support for a stable Ni-based methanation catalyst

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Journal of Rare Earths 2018年第4期36卷 367-373页

作者： Yang han Bo Wen Mingyuan Zhu Bin dai School of Chemistry and Chemical Engineering of Shihezi University Shihezi 832000China Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan Shihezi 832000Chino

Herein, lanthanum was incorporated via hydrothermal synthesis into a MCM-41 framework structure with La/Si molar ratios from 0.01 to 0.1. Samples of NiO supported on LaMCM-41 were prepared using the impregnation method. The catalyst performance was evaluated using a fixed bed CO methanation reactor. A Ni/LaMCM-41 catalyst with La/Si = 0.1 shows the best catalytic performance with a CO conversion of almost 100% and a CH4 selectivity of 89.5% at 250 ℃ under a pressure of 1.5 MPa and at an airspeed of 36,000 mL/（g·h）. Compared with Ni-La/MCM-41（La/Si = 0.1） and Ni/MCM-41 prepared via the impregnation method, Ni/LaMCM-41（La/Si = 0.1） shows a higher CO conversion and CH4 *** a 100 h stability test, the Ni/LaMCM-41（La/Si = 0.1） catalyst shows excellent stability; furthermore, the CO conversion is always greater than 98.0%, which is significantly better than the results for Ni/*** experimentally demonstrate that elemental La enters the framework of MCM-41. The Ni/LaMCM-41 catalyst performs well because the La reduces the average particle size of the NiO particles and enhances the interaction between NiO and MCM-41; moreover, the introduction of La significantly inhibits the sintering of the catalyst and the formation of carbon deposits.

关键词： Syngas methanation LaMCM-41 Anti-carbon deposition Catalytic stability Rare earths

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On the behaviour characterization of metallic cellular materials under impact loading

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Acta Mechanica Sinica 2010年第6期26卷 837-846页

作者： dai-Ning Fang Yu-Long Li han Zhao College of Engineering Peking University 100871 BeijingChina School of Aeronautics Northwestern Polytechnical University 710072 Xi'anChina Laboratoire de Mecanique et Technologie ENS-Cachan/CNRS-UMR8535/Universite Pierre and Marie Curie61avenue du president Wilson 94235 Cachan CedexFrance

This paper reviews the common mechanical features of the metallic cellular material under impact loading as well as the characterization methods of such behaviours. The main focus is on the innovations of various testing methods at impact loading *** aspects were discussed in details.（1） The use of soft nylon Hopkinson/Kolsky bar for an enhanced measuring accuracy in order to assess if there is a strength enhancement or not for this class of cellular materials under moderate impact loading;（2） The use of digital image correlations to determine the strain fields during the tests to confirm the existence of a pseudo-shock wave propagation inside the cellular material under high speed impact：（3） The use of new combined shear compression device to determine the loading envelop of cellular materials under impact multiaxial loadings.

关键词： Foam Honeycomb Lattice Hopkinson bar Rate sensitivity

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Corrigendum to ＂The Mechanics and Trajectory Control in Locust Jumping＂ [Journal of Bionic Engineering, 2013, 10, 194-200]

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Journal of Bionic Engineering 2014年第2期11卷 322-323页

作者： Longbao han Zhouyi Wang Aihong Ji Zhendong dai Institute of Bio-inspired Structure and Surface Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China China International Engineering Consulting Corporation Beijing 100048 P. R. China

This communication gives the corrigendum to the paper ＂The Mechanics and Trajectory Control in Locust Jumping＂, Journal of Bionic Engineering, 2013, 10, 194-200. doi： 10.1016/S1672-6529（13）60215-2

关键词： Mechanics Trajectory Control Locust Jumping

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Structure change of 430 stainless steel in the heating process

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Journal of University of Science and Technology Beijing 2008年第1期15卷 34-37页

作者： Xinzhong Liu Jingtao han Wanhua Yu Shifeng dai School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

The microstructure analysis was employed for the ferrific stainless steel （SUS430） with the carbon content from 0.029wt% to 0.100wt% under the simulated heating process condition. The higher carbon sample （430H） contains the duplex phase microstructure at the temperature of 1150℃; on the other hand, the lower carbon content sample （430L） does not touch two phase area even at the temperature of 1450℃ and has the single phase ferritic microstructure. The carbon content need be well controlled for the 430 ferritic stainless steel since it can significantly affect the heating process curve, and the heating process may not be done in the two phase area due to the uncontrolled carbon content. With the low carbon content and the proper soaking time, the grain size is not sensitive to the heating process temperature and the soaking time. In the present heat treatment experiments, the soaking time is about 10 min, and the processing parameters can be chosen according to the requirement of the gross energy, the efficiency and the continual forming. 2008 University of Science and Technology Beijing. All rights reserved.

关键词： ferritic stainless steel carbon content microstructure heating curve

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State to State Photodissociation Dynamics of Vibrationally Excited D2O in B Band

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Chinese Journal of Chemical Physics 2015年第4期28卷 -页

作者： Shan-yu han Lin-sen Zhou dai-qian Xie Institute of Theoretical and Computational Chemistry Key Laboratory of Mesoscopic ChemistrySchool of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China Institute of Theoretical and Computational Chemistry Key Laboratory of Mesoscopic ChemistrySchool of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China Hefei 230026 China

The state-to-state photodissociassion dynamics for the B band of D2O have been explored from quantum dynamical calculations including the electronic ̃X and ̃B states. The calculations were carried out using a Chebyshev real wave packet method. The calculated absorption spectra, product state distributions, and branching ratios from different initial vibrational states show different dynamic features, due to the different shapes of the vibrational wavefunctions. The initial bending mode (0,1,0) generates two lobes with a shallow minimum on the absorption spectrum and a slight inverted vibrational population of OD(̃X) product at high total energies. The rotational state distributions of OD(̃X, v=0) product are highly inverted and depend weakly on the initial state and total energy. On the other hand, the ro-vibrational distributions of OD(̃A) product strongly oscillate with the total energy, which are dominated by the long-living resonances and depend sensitively on the potential surfaces. The antisymmetric stretching mode (0,0,1) has large OD(̃A)/OD(̃X) branching ratios at high total energies, which indicates that the B band dissociation proceeds mainly via the adiabatic pathway in some cases.

关键词： Photodissociation D2O Vibrationally excited state Conical intersection Quantum dynamics

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