• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database

2007 Vol. 20, No. 2

Display Method:
mici
Effect of Geometric Nonlinearity on Deformation of Extra-Long-Span Cable-Stayed Bridge
LI Qiao, YANG Xingwang, BU Yizhi
2007, 20(2): 133-137.
Abstract:
To fully take the effect of geometric nonlinearity on the deformation of extra-long-span cable-stayed bridges into account, the effect of geometric nonlinearity on the deformation of a cable-stayed bridge with a main span of 1 088 m, as an example, was analyzed on the basis of the girder initial fab...
Full Scale Model Test on Cable-Girder Anchorage of Zhanjian Gulf Bridge
WANG Zijian, WEI Xing, LI Xiaozhen, LI Jun, QIANG Shizhong
2007, 20(2): 138-142.
Abstract:
By taking Zhanjiang gulf bridge as the research object, a full scale model test for cable-girder anchorage, as the key part of bearing safety of cable-stayed bridges, was made to further investigate the mechanism of cable force transmission and the regularity of stress distribution to evaluate its s...
Geodetic Coordinate System Suitable for Shanghai-Hangzhou Magnetic Suspension Project
SHI Yimin, LUO Yan
2007, 20(2): 143-147.
Abstract:
In order to satisfy the requirement for the route location of the Shanghai-Hangzhou magnetic suspension project, a new form of geodetic coordinate system was proposed.This geodetic coordinate system is defined by meridians and parallel circles, but with two coordinate parameters expressed by length....
Study on Method of GPS Height Fitting Based on BP Artificial Neural Network
LIU Chenglong, YANG Tianyu
2007, 20(2): 148-152.
Abstract:
In order to provide an effective method of GPS height fitting, a novel method based on BP artificial neural network was proposed, and compared with the polynomial surface fitting method by taking the data of two engineering control networks as examples.Theory and practice show that GPS height fittin...
Water Environment Capacity Calculation of Fujiang River in Mianyang
YANG Lizhong, XIONG Feng, LUO Jie
2007, 20(2): 153-157.
Abstract:
To decrease the water pollution of the Fujiang river within the administrative district of Mianyang, the standard exponent method was used to appraise the water quality.Nine functional water areas were partitioned, different models based on the characteristics of each area were constructed, and the ...
Study on Mechanism of High Fill Settlement Controlled by Dynamic Compaction and Bedded-Earth Rolling
HUANG Tao, LIU Hui
2007, 20(2): 158-162.
Abstract:
In order to improve the effect of dynamic compaction, from the present situation of the research on the mechanism of uneven high fill settlement controlled by dynamic compaction, the mechanism of high fill settlement controlled by dynamic compaction and bedded-earth rolling was investigated on the b...
Deformation Law and Disaster Prediction of Tunnel in Creep Landslide
TAG Zhiping, ZHOU Depei
2007, 20(2): 163-168.
Abstract:
To provide a decision-making basis for the prevention of tunnel disasters in creep landslide, three typical geological mechanics models for tunnel deformation were given.Then an equal-dimensional new-information grey model GM (1,1) for predicting tunnel deformation was presented by investigating and...
Optimal Design of Grounding Grid Based on Improved Genetic Algorithm
WU Guangning, FU Longhai, WANG Hao, LI Jin
2007, 20(2): 169-174.
Abstract:
To decrease earth surface potential gradients and minimize the length of grid conductors, an optimization method was proposed, and an optimization model for grounding grids was presented.An improved genetic algorithm (GA) was applied to optimize the model, in which the fitness function, crossover an...
Time Delay Estimation and Adaptive Control of Networked Control Systems
LI Chunmao, XIAO Jian, ZHANG Yue
2007, 20(2): 175-180.
Abstract:
A novel approach for predictive control of an NCS (networked control system) was proposed.To derive the model for prediction of time delays in an NCS, the time delays were transformed into a nonlinear time series, and a RBF (radial basis function) was taken as the kernel function of LS-SVM (least sq...
Feedback Linearization and Decoupling Control of Induction Motors
WANG Tao, XIAO Jian, YAN Shu
2007, 20(2): 181-185.
Abstract:
A new control strategy was proposed to decouple magnetic flux linkage in the rotor from speed into two independent linear subsystems, namely,Φ=φrα2+φrβ2, The decoupled system can be solved with the linear quadratic optimal control theory.The designed control law is globally defined without singulari...
Microwave Output Patterns of Coaxial Vircators
LUO Xiong, UAO Cheng, MENG Fanbao
2007, 20(2): 186-189.
Abstract:
To thoroughly understand the principle of the coaxial virtual cathode oscillator, the microwave output patterns of coaxial vircators were studied by theoretical analysis and numerical simulation.The analysis results were compared with the directional radiation diagram obtained from experiments on a ...
Frequency-Domain Characterization for Electromagnetic Pulses with Random Timing Jitter
XU Jianjun, UAO Cheng, XIAO Kaiqi
2007, 20(2): 190-193.
Abstract:
To study the periodical electromagnetic pulses with random timing jitter radiated by electromagnetic pulse transmitters, the PSD (power spectral density) of periodical electromagnetic pulses with random timing jitter was obtained based on the analysis of the g-function of the PSD of timing jitter.Th...
Pulse Repetition Interval Modulation Recognition Based on Frequencies and Patterns
RONG Haina, ZHANG Gexiang, JIN Weidong
2007, 20(2): 194-199.
Abstract:
According to the characteristics of pulse trains of radar signals, frequency and pattern are extracted from radar emitter signals.The two features constitute two-dimensional vectors, which are taken as inputs of a classifier designed by a support vector machine to identify the pulse repetition inter...
Dynamic Source Routing Protocol Based on Frame Delivery Ratio in Wireless Mesh Networks
SHEN Qiang, FANG Xuming
2007, 20(2): 200-205.
Abstract:
For load balance in wireless mesh networks (WMNs), a dynamic source routing (DSR) protocol based on frame delivery ratio (FDR) was proposed.In the protocol, route discovery and route decision are optimized through awareness of FDR in WMNs.Simulation results show that, in a quasi-static network topol...
Dynamic Optimum Design of Tower Crane Structures
YU Lanfeng, WANG Jinnuo
2007, 20(2): 206-210.
Abstract:
To improve the dynamic performances of tower cranes, a dynamic optimum mathematical model was established to optimize the dynamic stiffness.The key modal frequency was determined based on modal analysis and harmonic response analysis, and the modal frequency was taken as the optimization objective.S...
Variable Linear Phase IIR Filter for Extraction of Track Inspection Signals
ZHENG Shubin, LIN Jianhm, LIN Guobin
2007, 20(2): 211-216.
Abstract:
A design method for variable IIR (infinite impulse response) filter based on spectral transformation was presented, and time reversed section technique was utilized to achieve its linear phase characteristic.The filter was designed to conform with the specification of extracting irregularity with wa...
Fatigue Life Simulation of Flexible Carbody under Dynamic Loading
MIAO Bingrong, XIAO Shoune, ZHANG Weihua, JIN Dingchang, HU Wenhui
2007, 20(2): 217-222.
Abstract:
To accurately evaluate the fatigue lives of flexible carbodies under dynamic loading, a full locomotive multi-body dynamic model was established by integrating multi-body dynamic simulation (MBS)and finite element method (FEM).Loading histories at 35 critical positions were calculated, and quasi-sta...
Numerical Analysis of Impact Dynamics with Meshless Method
ZHAO Guangming, SONG Shuncheng, CHANG Zhiyu
2007, 20(2): 223-228.
Abstract:
Dynamic impact processes was analyzed and simulated with reproducing-kernel particle method (RKPM).To solve the nonlinear problem, such as material nonlinearity and geometrical nonlinearity, incremental method was used.For a impact process with a normal impact velocity, the control equation for RKPM...
Width Error Analysis of Stent Strut and Optimization of Laser Cutting Procedure
ZHANG Yong, QIANG Hua, HAO Jing, HUANG Nan, DU Quanxing
2007, 20(2): 229-233.
Abstract:
To solve the problem of uneven strut widths of stents cut by laser, laser cutting procedure test was conducted, and the motion of the tube was analyzed.The results show that the deviation of the strut width is mainly caused by the variation in laser defocus and that in the tangent velocity at the cu...
Departure Time of Passenger Train Based on Reasonable Following Condition
CHEN Lingling, WANG Ciguang
2007, 20(2): 234-237.
Abstract:
In order to make the arrival time of up and down direction passenger trains join mutually in drawing up of a passenger train diagram to shorten the change and ride time of passengers in a transfer station, the congruence theory was applied to investigate the time interrelation for two passenger trai...
Cooperative Simulation Model for Driving Behavior Based on Cognition Activity Chain
WANG Xiaoyuan, WANG Lei
2007, 20(2): 238-242.
Abstract:
To provide a theoretical reference for the development of advanced vehicle control systems and intelligent vehicles, the principal component analysis was used to determine the influence coefficient of multi-information on driving behavior decision-making, and the fuzzy integral fusion algorithm was ...
Relationship between Bus Stoppage Time and Passenger Behavior
WU Yang, LUO Xia
2007, 20(2): 243-248.
Abstract:
To enhance the prediction precision of self-service bus stoppage time, the action sequence and action duration of passenger boarding and alighting behaviors were investigated in order to establish a bus stoppage time model for self-service buses.The investigation shows that if passenger density is n...
Integrated Logistics Network Design for Hybrid Manufacturing/ Remanufacturing Systems Based on Present Worth Method
DAI Ying, MA Zujun
2007, 20(2): 249-254.
Abstract:
To set up an appropriate integrated logistics network for hybrid manufacturing/ remanufacturing systems, an optimization model for designing such a network was established based on mixed integer linear programming approach.In this model, the present worth method was used to consider the time value o...