MULTI-OBJECTIVE OPTIMAL DESIGN OF ALUMINUM CELL by YANG EChuan, HUANG Lu, PANG Tong, ZHANG ZhenHua, YUAN TianXun

“…On the basis of verifying the effectiveness of the simulation method,frontal collision models of the trolley with three different forms of multi-lattice crash box were established. …”
Get full text

Interference detection and diversity suppression algorithm of OFDM system under partial-band jamming by Guo LI, Ni WEN, Fengkui GONG, Jian ZHANG, Sihan ZHANG

“…For the currently widely-used OFDM system, which greatly improved the communication performance under the condition of partial-band jamming, an interference detection algorithm based on FCVE and an interference suppression algorithm based on frequency diversity were proposed.The threshold factor formula of FCVE algorithm was derived theoretically, and the interference detection threshold was calculated by using the threshold factor and the variance of the received signal, so as to achieve the interference detection with high accuracy.The simulation results show that the proposed FCVE algorithm significantly improves the interference detection probability of the classical FCME algorithm under the condition of high signal to interference ratio (SIR).Further, the interference can be greatly suppressed based on the idea of frequency diversity with the result of interference detection.The simulation results show that the bit error rate of the system can be reduced by two orders of magnitude under the same SIR.…”
Get full text

Cooperative Analysis of a Scorpion-like Composite Robot with Multiple Arms by Xue Jiaolong, Gao Qiang, Zhang Jie, Yan Hongwei

“…In order to verify the rationality of the robot structure, the overall D-H structure of the composite robot is modeled by Matlab, the forward and inverse kinematics of the legs of the composite robot are analyzed, and the working space probability model of the infrared thermometer with both arms and tail is obtained by Monte Carlo method simulation. In order to verify the motion stability of the robot, the stable gait of the composite robot was obtained through Adams simulation. …”
Get full text

Influence of the optical switch’s extinction ratio on the crosstalk in fiber-optic seismometer array by Fei LIU, Xian ZHOU, Min ZHANG

“…Optical switch is one of the key components in the time-division multiplexing fiber-optic seismometer array and has significant influence on the crosstalk of the array.The source of crosstalk in the array was analyzed based on differential delay heterodyne demodulation scheme.The expression of crosstalk appearing in the seismometer’s output was deduced with the limited extinction ratio.Via simulation, the relationship between the extinction ratio of optical switch and the seismometer’s crosstalk was presented under different array scales, i.e.basically the crosstalk decreases linearly with the increase of optical switch’s extinction ratio, and increases linearly with the increase of the array scale.Finally, an 8-element fiber-optic seismometer array was set up in the experiment, on which different optical switches (acousto-optic modulator and electro-optic modulator) owning distinct extinction ratios could be applied to generate pulse light.Experimental results verified the theoretical analysis as well as the simulation results.…”
Get full text

Novel coding and decoding scheme for modified optical duobinary signal transmission by SHAO Yu-feng, CHEN Lin, WEN Shuang-chun, ZHU Jiang-zhang

“…A novel pre-coding scheme for modified optical duobinary signals was proposed.It could be applied to trans-mit high speed data rate signals（≥ 10Gbit/s）.Through analyzing the process of coding and decoding,It was demon-strated that modified optical duobinary signals have capability in reduction of pulse-to-pulse interaction,and could be di-rectly measured through a conventional binary intensity modulation direct detection（IM-DD） receiver.Two modified op-tical duobinary signals’ formats were simulated to generate.Simulation results show that MD-NRZ and MD-RZ signals’ formats can avoid the eye diagrams’ distortion for long-distance transmission,if the dispersion can be compensated in each amplifier span.Moreover,the MD-RZ signal has lower BER than the MD-NRZ signal after long-distance commu-nication.…”
Get full text

STUDY ON THE OPERATING CHARACTERISTICS OF UNLOADER OF RECIPROCATING COMPRESSOR STEPLESS CAPACITY REGULATION SYSTEM by ZHENG ZhaoXing, JIANG ZhiNong, WANG Yao, ZHANG JinJie

“…In this paper, ANSYS/Ls-dyna explicit dynamics software is used to simulate the automatic opening process of the intake valve at the rated speed of the compressor. …”
Get full text

Quantum dimer models with Rydberg gadgets by Zhongda Zeng, Giuliano Giudici, Hannes Pichler

“…The Rydberg blockade mechanism is an important ingredient in quantum simulators based on neutral atom arrays. It enables the emergence of a rich variety of quantum phases of matter, such as topological spin liquids. …”
Get full text

Cooperative ARQ protocol based on switch and stay node selection in WSN by HU Ying-bo1, CAI Yue-ming1

“…A cooperative automatic repeat request（ARQ） protocol based on switch and stay node selection（SSNS-CARQ） was proposed,which could obtain high energy efficiency and reliable transmission at the same time.A Markov model for analyzing the system throughput was built,and system throughput performance of the proposed protocol and the traditional ARQ protocol were analyzed based on such model.Based on a widely used energy consumption model in WSN,the energy consumption performance of SSNS-CARQ protocol and the traditional ARQ protocol were discussed and compared in terms of energy efficiency,and the effects that positions of relay nodes imposed on energy efficiency were also disscussed.Numerical and simulation results validated the Markov model effective for analyzing the system throughput.It is shown that SSNS-CARQ protocol could perform better in terms of throughput and energy efficiency when compared with the traditional ARQ protocol through simulations.…”
Get full text

Utility-driven based co-allocation resource reservation strategy in computational grid by Chang-song DING, Zhi-ying WANG, Zhi-gang HU

“…The performance of the proposed strategy was simulated in a grid simulation system using the real task load of the practical grid system. …”
Get full text

Forecasting of Storm Surge in Ningbo Coastal Waters Based on ADCIRC Mode by LI Huan, ZHOU Tianyi, ZHANG Lifen

“…The result shows that the mode has high calculation accuracy and is suitable for numerical simulation forecasting of typhoon storm surge in Ningbo coastal waters, which can provide technical parameters for forecasting and warning in Ningbo coastal waters.…”
Get full text

Vanadium dioxide-based tunable broadband metamaterial absorber in the terahertz by Yuqi Zhu

“…Absorption curves were calculated using the multiple-reflection principle and impedance matching theory, and the obtained results were consistent with the simulation results. According to simulation results, within the range of controllable conductivity of VO _2 , the absorption rate of the as-developed structure varied from 1.5% to 99.8%, with the bandwidth extending from 0 THz to 5.19 THz. …”
Get full text

Analysis of coverage probability in NOMA-HetNet based on Matern cluster process by Xiaorong JING, Yixi CHEN, Qianbin CHEN

“…Considering the correlation between the users and base stations and the network irregularity,the non-orthogonal multiple access heterogeneous networks (NOMA-HetNet) based on Matern cluster process (MCP) was modeled.The coverage probability of UEs was analyzed.Firstly,the signal-to-interference-plus-noise ratios (SINR) of UEs were theoretically derived.Secondly,an updating law for the upper limit of SINR was presented for the imperfect serial interference elimination (SIC) scheme,which was more consistent with the reality.Then,using the mathematical tools such as spatial coordinate system,probability theory,stochastic geometry theory and order statistics,the correlation probability and service distances of the different types of UEs were analyzed.Finally,the theoretical expression of the coverage probability of UEs was derived.The effects of cluster radius,base station density,interference residual factors on service distances,and coverage probability are verified by numerical simulations.The simulation results are consistent with the theoretical analysis,which testifies the correctness of the theoretical analysis.…”
Get full text

Deployment Strategy and Dynamic Analysis of Large Ring Truss Antenna by Jiang Zhao, Jungang Yang, Yong Xiao, Xiaofei Ma

“…The driving forces are predicted according to the dynamic simulation.…”
Get full text

DESIGN AND RESEARCH ARM OF THE CONVERTER SLIDE by ZHAO LiJuan, ZHOU WenChao, TIAN Zhen, MENG Yang

“…By ADAMS kinematics and dynamics simulation analysis,mounting arm motion displacement curve and the mounting process load lifting arm high dynamic stress areas. …”
Get full text

RESEARCH ON VIBRATION CHARACTERISTICS OF LINEAR CONJUGATE PLANETARY GEAR REDUCER WITH SMALL TOOTH DIFFERENCE (MT) by CUI JianKun, XIA Juan, ZHOU KongTao

“…The vibration experiment results are consistent with the simulation results. The vibration characteristics research results show that the input speed has a significant impact on the vibration amplitude and frequency of the linear conjugate small tooth difference planetary gear reducer.…”
Get full text

Research on Transmission Capacity Characteristics of the Cluster Flight Spacecraft Network by Li Su, Jian Wu, Jinrong Mo

“…Subsequently, according to the Macdonald random variable form, the expression of the outage probability of amplify-and-forward is derived. By simulating the transmission capacity of decode-and-forward, the transmission capacity characteristics of a single hop and dual hops are analyzed. …”
Get full text

P（2-RPS）&U Reconfigurable Rehabilitation Mechanism Used for Human Joint and Its Kinematics Analysis by Wangwang Guo, Ruiqin Li, Fengping Ning

“…The singularity positions can be avoided by adding the driver. The kinematics simulation of the P（2-RPS）&U reconfigurable rehabilitation mechanism is carried out by using Adams software. …”
Get full text

CALCULATION OF THE BLADE AND THE BLADE-DISC COUPLING SYSTEM OF COMPRESSOR by YIN ZhiPeng, LI QuanTong, GAO XingWei, CHEN PengFei, TANG Ling

“…Dynamics of the clamped constrained blade was obtained by modal simulation and the influence of centrifugal force on the vibration of blades was researched. …”
Get full text

5G millimeter wave cell search algorithm with beam sweeping by Min SHEN, Jing LIANG, Jiazhi HOU

“…Due to the high carrier frequency of the 5G millimeter wave,a large initial access frequency may cause inaccurate time-frequency synchronization at the transmitting and receiving ends and incorrect detection of the physical layer cell identifier.A cell search scheme for 5G millimeter waves to send synchronization signals in a beam sweeping mode at high frequencies was analyzed and simulated.Specifically,a multi-directional synchronization signal block sent by a DFT codebook at the base station side was proposed.The terminal used an omnidirectional antenna to receive multi-beam signals and used a series of synchronization algorithms to complete time,frequency synchronization,and physical layer cell identification.Simulation results show that the proposed main synchronization signal detection algorithm with cross-correlation of pre-stored integer frequency offset and received signal has good cell search performance on 5G millimeter-wave channels.…”
Get full text

Study on the Anticollision Performance of a New Corrugated Steel Protection System for Bridge Pier by Guicheng Chen, Haidong Huang, Zhongfu Xiang

“…The results show that the new method can effectively simulate the mechanical behavior of bolts and CSP. …”
Get full text