• 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

2010 Vol. 23, No. 5

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Effect of Coupler Compression Force on Locomotive Safety on Tangent Track
YANG Guang-Wu, XIAO Shou-Ne, MA Wei-Hua
2010, 23(5): 657-662. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1747)
Abstract:
Equations of loads on the car-body were derived, and relations between yaw stiffness of the coupler and yaw angle of the car-body as well as compression forces were determined based on the car- body geometry and loads on the coupler and the car-body. The load equations were solved with a Newton iter...
Influences of Relative Position between Turnout and Bridge on Coupled Vibration of Train-Turnout-Bridge System
QUAN Shunxi, WANG Ping, CHENG Rong
2010, 23(5): 663-668. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1714)
Abstract:
In order to determine the reasonable relative position between turnout and bridge, a vibration analysis model for the coupled train-turnout-bridge system was built, and the numerical simulation method was applied to analyze the influences of the relative position between turnout and bridge on the dy...
Mechanical Properties of Continuous-Slab-Track Welded Turnout on Bridge
QIAO Shenlu, GAO Liang, QU Cun, XIN Tao
2010, 23(5): 669-675. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1228)
Abstract:
In order to study the mechanical properties of longitudinal connected ballastless welded turnouts on bridges, a longitudinal-transverse-vertical spatial coupling model was established according to the characteristics of the turnouts using finite element method. Taking the single crossover of No. 18 ...
Shakedown Limit Analysis for Plastic Deformation Failure of Gears
LIAO Haiping, 2, LIU Qiyue
2010, 23(5): 676-680. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1018)
Abstract:
In order to study the influences of residual stresses on the plastic limit of gear material for optimal design of cylindrical spur gears, the elastic contact stress, residual stress, and elastic-plastic contact stress in gear engagement were analyzed using the Hertz contact theory and elastic-plasti...
Effects of Refrigerant Charge on Performances of Transcritical CO2 Heat Pump Water Heater
JIN Dongxu, 2, KOYAMA Shigeru, XUE Jun, TAKATA Nobuo
2010, 23(5): 680-684. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1032)
Abstract:
The performance parameters such as heating COP ( coefficient of performance ), compression ratio, suction and discharge pressures, and so on, of a transcritical CO2 heat pump water heater were experimentally investigated under various refrigerant charging conditions to study the effects of refrigera...
Intelligent Monitoring System for Screw Life Evaluation
GAO Hongli, LI Dengwan, XU Mingheng
2010, 23(5): 685-691. doi: 10.3969/j.issn.0258-2724.2010.05.006
[Abstract](1619)
Abstract:
The effects of rotating speed and load on screw life were investigated to study the performance degradation of screws of NC (numerical control) machine tools under different machining conditions. The real time data of vibration and cutting forces were collected. The key effects on the screw life wer...
Checking Calculation of Fatigue Strength for Cast Steel Joints of Offshore Tour Tower under Wave Loads
JIN Hui, 2, LI Jing, LI Aiqun
2010, 23(5): 692-697. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1062)
Abstract:
In order to estimate the fatigue life of cast steel joints, by taking the steel tour tower structure on the offshore platform of Hangzhou Bay bridge as an example, a checking calculation method of fatigue strength for cast steel joints under wave loads was proposed. Using the statistical method, the...
Load-Bearing Capacity of Reinforced Joint of Complicated Multi-dimensional Rectangular Hollow Section Truss
XU Hu, YU Zhixiang, ZHAO Shichun
2010, 23(5): 698-704. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1103)
Abstract:
To compare the mechanical behaviors of multi-dimensional rectangular hollow section joints with different reinforced measures, the load-bearing capacity of a typical joint in the long-span steel structure roof of Hohhot eastern railway station was calculated and analyzed. Three kinds of joints, thic...
Experimental Research on Aseismic Behaviors of High-Strength Reinforced Concrete Frame Columns
FENG Hong, LI Liren, CHEN Yongqing
2010, 23(5): 705-712. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1045)
Abstract:
In order to investigate the failure mode and seismic behaviors of high-strength reinforced concrete (HSRC) frame columns under the combined action of compression, bending and shear, quasi-static experiments on 19 such frame columns under low cyclic reversed loading were conducted. The influences of ...
Limit Cycle Oscillation of Conical Shells with Standing Wave Flutter
FAN Chenguang, YANG Yiren, LU Li
2010, 23(5): 713-717. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](729)
Abstract:
To study the nonlinear fluttering response of a truncated conical shell under large-amplitude nonlinear vibrations, aeroelastic equations were derived using the aerodynamic force method of the piston theory. The discretization of the equations was realized with differential quadrature method. The ef...
Void Identification of Concrete Pavement Slab Based on Transient Impulse Response
WANG Qi, 2, HAN Xi, YI Zhijian
2010, 23(5): 718-724. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](898)
Abstract:
In order to develop a special instrument for the detection of voids beneath a concrete pavement slab, cut down detection cost and simplify detection process, a transient impulse response method was proposed based on the analysis of the existing detection methods and the changes in the frequency and ...
802. 11s Based Fast Transition Scheme for Wireless Mesh Network
FANG Xuming, SUN Shujie, HE Rong
2010, 23(5): 725-731. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](998)
Abstract:
In order to guarantee that a mobile station without mesh function can still keep a high transmission rate while it moves fast between wireless access points in the wireless mesh network (WMN), a layer two (L2) fast transition scheme based on 802. 11s WMN was proposed. This scheme employs the idea of...
Blind Recognition of OFDM Signals Based on Multi-parameter Characteristics
GUO Lili, YU Zhiming
2010, 23(5): 732-738. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1275)
Abstract:
A blind identification algorithm of multi-carrier modulation under the condition of Rayleigh fading channels was proposed to distinguish multi-carrier modulation OFDM (orthogonal frequency division multiplexing) signals and digital single-carrier signals (such as MASK (multiple amplitude shift keyin...
Group Successive Interference Cancelator Based on Minimum Mean-Square Error Detection
ZHANG Donghong, 2, LIAO Guisheng
2010, 23(5): 739-744. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](916)
Abstract:
In order to reduce the demodulation delay of the conventional successive interference cancelator (SIC) and improve the BER (bit error rate) performance of each stage, an improved SIC was proposed based on the diagonal loading method and the interval grouping method. This improved SIC loads the corre...
Key Recovery Attack on Stream Cipher Grain v1 and Its Improvement
YANG Wenfeng, HU Yupu, GAO Juntao
2010, 23(5): 745-750. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](730)
Abstract:
In order to probe into the security of the stream cipher Grain v1, three design weaknesses of the Grain v1 key-stream generator were pointed out by studying its structure. Based on the above work, a key recovery attack on the stream cipher Grain v1 with an intermediate state was proposed. Time compl...
One-Way Hash Function Construction Based on Chaotic Message Expansion
GUO Wei, WANG Xiaomin, LIU Jing, HE Dake
2010, 23(5): 751-757. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](840)
Abstract:
In order to overcome the defects of the existing Hash algorithm, a novel Hash algorithm based on chaotic message expansion was proposed. This algorithm combines the advantages of a chaotic system and conventional one-way Hash function, follows the traditional Merkle-Damgard construction and compress...
Comprehensive Evaluation of Risk Severity Level of Railway Signal System
ZHANG Yadong, GUO Jin, SHAN Na
2010, 23(5): 759-763. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1746)
Abstract:
In order to assess the risk severity level of a railway signal system more scientifically, a comprehensive evaluation method of the risk severity level was proposed based on the expert evaluation method and the characteristic of the risk severity level of railway signal systems and by comprehensive ...
Integral Dropper Assembly fornOverhead Contact Line of High-Speed Railway
FANG Yan, GAO Shi-Bin
2010, 23(5): 763-767. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1583)
Abstract:
In order to accurately calculate the dropper lengths，strictly control the contact wire height, improve the uniformity of elasticity and achieve good current collection quality, a new algorithm for integral dropper assembly based on form-finding for cable structure and finite element method was propo...
Evaluation Model for Damage Extent of Roads in Wenchuan Earthquake-Stricken Areas Based on Remote Sensing Information
QIN Jun, CAO Yun-Gang, GENG Juan
2010, 23(5): 768-774. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1235)
Abstract:
A low-altitude remote sensing data-based evaluation model for damage extent of roads was proposed for rapid assessment of transport facilities in Wenchuan earthquake-stricken areas. Spatial information about roads, bridges, tunnel portals and spatial distributional information about landslides, coll...
Planar Angle Measurement Based on Computer Vision
WANG De-Hui, YUAN Zhong-Fan, FAN Qiang-Wen
2010, 23(5): 775-780. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](822)
Abstract:
In order to solve the rapid angle measurement problem in the fields such as manufacturing, geology and control engineering, a non-contact angle measurement algorithm based on computer vision was proposed. In this algorithm, the camera's intrinsic parameters should be known before measurement and onl...
Additional Stresses in High-Strength Pile Composite Foundation under Embankment Load
LUO Qiang, ZHANG Minjing, ZHANG Liang, ZHANG Lixiang
2010, 23(5): 780-786. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](916)
Abstract:
In order to calculate additional stresses in high-strength pile composite foundation, the Mindlin and Boussinesq union method was used. This method calculates the additional stresses caused by pile load and inter-pile soil load separately. Based on test data from a soft foundation, the distribution ...
Cushion Effect Analysis of Pile-Net Composite Foundation Based on Field Tests
ZHANG Liang, LUO Qiang, LIU Xiaoxiao, ZHANG Lixiang, LIN Kun, ZHANG Shengli
2010, 23(5): 787-793. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1019)
Abstract:
In order to provide a reference for the cushion design of pile-net composite foundation, four groups of field tests with different pile cap sizes were carried out, and data of foundation settlement, foundation pressure and cushion bar tension were obtained. The test result shows that pile cap can si...
Application of Point Safety Factor to Study on Spatial Sliding Mechanism of Landslide
YANG Tao, YOU Xiang, QIN Yongtao
2010, 23(5): 794-799. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](975)
Abstract:
In order to describe quantitatively the spatial sliding mechanism of landslides, a 3-D numerical model was set up, and spatial stress states and sliding directions of elements in slide zone were obtained. The ratio of shear strength to shear stress paralleling to sliding direction was defined as poi...
Syntheses and Structure of Drug-Loaded Multilayer Composite
ZHANG Zhibin, 2, WU Jing, SHUAI Yunfeng, YAN Xiaoli, WAN Changxiu
2010, 23(5): 800-804. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1187)
Abstract:
Drug-loaded CS ( chitosan), TCS ( tetracycline hydrochloride/ chitosan/ sodium alginate) composite, and multilayer composite microspheres for bone repair were synthesized respectively by the emulsion-crosslinking method, coacervation phase separation method, and a heated suspension composition proce...
Effect of Aramid Fibre and Pulp Morphologies on Properties of Sheet
ZHANG Sufeng, 2, LIU Wen, ZHANG Meiyun
2010, 23(5): 805-810. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](930)
Abstract:
In order to reveal the relationship between the morphology of aramid fibre and pulp and the sheet structures and properties, the morphologies of aramid fibre and fibrids (pulp) were characterized using light microscopy (LM), scanning electrical microscopy (SEM), and atomic force microscopy (AFM); th...
Determination Method of the Optimal Revenue-Sharing Coefficient in Three-Echelon Logistics Service Supply Chain
LIU Wei-Hua
2010, 23(5): 811-816. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1195)
Abstract:
In order to determine the revenue-sharing coefficient of supply chain with a revenue-sharing contract, a Stackelberg game model with the logistics service integrator as a leader was built by taking the non-storage property of logistics service supply chain into consideration. On the basis of the rev...
Trajectory Planning Model of 2-Directional Air Traffic Flows Based on Improved Clearance Strategy
ZHANG Chen, HU Ming-Hua, ZHANG Jin
2010, 23(5): 817-823. doi: 10. 3969/ j. issn. 0258-2724.
[Abstract](1548)
Abstract:
To study the traffic patterns of the 2-directional high-density air traffic flows, aircraft trajectory planning methods were discussed. Based on the model of the offset maneuver strategy, an improved strategy was proposed through a geometric analysis of the trajectories generated in a distributed de...

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