bluuebunny/crossref_metadata_2025 huggingface dataset:
Estimation of K in Ductile CT and SENB Specimens under LEFM and SSY Regimes by J Integral Method: A Review
Authors: Karadin Bhimsen , Satonkar Nilesh , Bhat Sunil
Published: March 2013

Stress intensity factor (K) is the measure of severity of stress at the crack tip. When K exceeds the critical limit (i.e., the material fracture toughness), the crack grows. K is valid in brittle materials (LEFM) and to some extent in ductile materials also provided there is small scale yielding (SSY) at the crack tip. The paper reviews the numerical methodology to obtain KI of ductile, Mode I cracked, CT and SENB test specimens in LEFM and SSY regimes with the help of J integral method. The numerical values are successfully compared with the theoretical values.
Research on Wire-Plugging Robot System Based on Machine Vision
Authors: Xing Si Ming , Luo Zhi Yong
Published: March 2013

ADSL line test in the field of telecommunication is high-strength work. But current testing method has low working efficiency and cannot realize automatic test. In this paper, the wire-plugging test robot system based on machine vision is designed to realize remote test and automatic wire-plugging, and it also can improve work efficiency. Dual-positioning method which based on technologies of color-coded blocks recognition and visual locating is used in this system. Color-coded blocks are recognized to realize socket coarse-positioning, the stepper motors in directions of X-axis and Y-axis are drived to move to nearby the socket quickly. Video-positioning technology is used to realized pinpoint the socket. The stepper motors of X-axis and Y-axis are drived to make a plugging to align a socket after the pinpoint action is realized, and then the motor in the direction of Z-axis is drived to realize wire-plugging action. Plugging is resetted to a safe place after the end of the wire-plugging. Performance tests have improved that this wire-plugging test robot system can realize plug-testing task quickly and accurately, so it is a stable wire-plugging equipment.
A New Memristor Based Chaotic System
Authors: Li Yu Xia , Zhao Lan Ying , Chi Wen Qing , Lu Shu Li , Huang Xia
Published: March 2013

In this paper, we present a new memristor based chaotic circuit, which is obtained by replacing the nonlinear resistor in the canonical Chua’s circuit with a charge-controlled memristor. This chaotic circuit uses only the four basic circuit elements, and has only one negative element in addition to the nonlinearity. The existence of the chaos is not only demonstrated by computer simulations, but also verified with Lyapunov exponents, bifurcation, poincaré mapping and power spectrum analysis.
The Application of RFID in Cigarette Warehouse Logistics
Authors: Du Guang Jie , Feng Yi Hua , Sun Hao
Published: March 2013

Current problems in cigarette warehouse are described in this article .The mechanism of RFID and system components are discussed. Besides, two examples of application based on RFID are analyzed. Then, the significance of the introduction of RFID in warehouse and logistics management is expounded in the paper.
Introduction of Quantum Cryptography
Authors: Guo Xiao Qiang , Yan Yan , Feng Li Chao , Zheng Shi Qiu
Published: March 2013

Quantum cryptography is the use of quantum existence state as the key of information encrption and decryption, the principle is the Einstein called "mysterious long distance activities" quantum entangled state. It is a quantum mechanical phenomenon, regardless of the distance between the two particles far, a particle changes will affect another particle, compared with the traditional password technology has a higher level of security. Quantum cryptography is a research hotspot of international academia in recent years. We introduce quantum key distribution, quantum commitment, bounded quantum storage model, position based quantum cryptography and post-quantum cryptography.
Point Cloud Process of Laser Scanning with a Mathematical Noise Model
Authors: Meng Na , Zhang Jian Zhong , Dai Bao Qing , Chen Xin Li
Published: March 2013

Considering the unreasonable noise of laser scanning point data during measuring, which causes the reconstructed curve and surface rough, some problems are analyzed to deal with noise. The mathematical noise model on scanning point cloud is proposed, which consists of deterministic and random noise error, and the random error mainly consists of geometric error and measurement one. The data process is proposed to reduce noise and to simplify data. The noise process consists of obvious noise removed, random filter algorithm and data fairing with an optimized correction value. Due to redundant data about mass point cloud, method of combining deviation parameters with allowed angle is proposed to simplify point cloud. The experiments show that the proposed method has many obvious advantages than a single algorithm of data processing, such as all sorts of noise data can be removed respectively, mass data can be streamlined. And the proposed algorithm has the advantages of high reservation of curve and surface reconstruction of point cloud.
Review on Certain Group Planning Domain of IPC
Authors: Luktarhan Nurbol , Xie Nan Nan , Niyazbek Muheyatn , He Jin Shan
Published: March 2013

Automated Planning is a very important branch of Artificial Intelligence, and one of the top competitions of Automated Planning is International Planning Competition, which is held by International Conference on Automated Planning and Scheduling. This paper gives the concepts about planning domains, and lists the sources of planning domains of IPC. Then from the aspects of application, the planning domains used in IPC are classified to three parts, theoretical research domains, application-oriented domains and comprehensive domains. And application-oriented domains are divided into five groups: robots-related domains, astronomy domains, engineering domains, games domains and network-related domains. Combining with the development of planning domains in 6 sessions of IPC, potential trends of the development of planning domains are explored.
Study on Discriminant Criterion of Highway Landslide Disaster
Authors: Li Yun Jun , Xie Qian Li
Published: March 2013

Highway landslide disaster is the main type of geological hazard in China, which causes great economic loss and casualty. According to the engineering experience, discrimination and criterion of highway landslide disaster is put forward in this paper on the basis of laws and types of highway landslide disaster, which includes nine big macroscopic discriminant criterion and five big microscopic discriminant criterion. On the basis of development process and stage, the development of landslide disaster is divided into three stages according to the practical needs: early embryonic stage, medium potential stage, late induced phase. To regional discriminant criterion of highway landslide disaster as the foundation, this paper presents the discriminant criterion of development for highway landslide disaster. It is hoped that the findings herein will provide science direction for temporal discriminant of highway landslide disaster.
Study of the Construction Plan Bid Assessment Method of the Coal Mine Project Based on Entropy-Weight Method
Authors: Wang Yang , Zhang Chuan Ming , Wang Zu He
Published: March 2013

In order to choose the optimal construction scheme in the coal mine construction project, this paper establishes evaluation indexes and applies entropy weight method to determine the objective weight of evaluation index based on the expert scoring so that the evaluation results are more consistent with the actual situation. This method solves the drawbacks that the evaluation indexes depend on the subjective assumptions too much and provide an effective method for choosing the optimal bid scheme of the coal mine construction.
Regional Evaluation of the Transportation Infrastructure Construction Level in China
Authors: Sun Ji De , Shen Liang Fa , Peng Wei
Published: March 2013

In order to evaluate the level of transportation infrastructure construction of 31 regions in China, 14 indicators are selected. Four factors are summarized to evaluate the construction level of transportation infrastructure using factor analysis, namely construction investment factor, traffic consumption factor, the per capita road factor and vehicle facilities factor, then the level of transportation infrastructure of 31 regions is evaluated based on these four factors’ variance contribution; cluster analysis using Ward 's Method is performed in order to assist the analysis, and the result is consistent with that of factor analysis. It is showed that, the construction level of transportation infrastructure in different regions is not balanced and the main reason is insufficient input in the construction. This paper proposes suggestions for analysis results.
Numerical Simulation and Laboratory Experiments of Hydraulic Fracturing of Highly Deviated Well
Authors: Zhu Hai Yan , Deng Jing Gen , Li Song Yang , Chen Zi Jian , Yan Wei , Hu Lian Bo , Lin Hai , Yan Chuan Liang
Published: March 2013

Considering the combined action of the fluid penetration and the casing, the seepage coupled deformation finite element model of the highly deviated casing perforation well is established by using the tensile strength failure criterion and applied on the BZ25-1 oil filed. The results show that the increasing of the perforation angle and the well azimuth and the decreasing of the inclination would lead to a higher fracture initiation pressure. The fracture initiation point always locates on the wellbore face when the influence of the casing is considered. When the casing is ignored: when the perforation angle is 0°-45°, the fracture initiation point locates on the root of the tunnel; when the angle is 45°-90°, the fracture initiation point may be on the wellbore face or the perforation biased toward the maximum horizontal stress direction; when the angle is near to 90°, the hydraulic fracturing difficultly fractures the rock through the perforation tunnels. The laboratory hydraulic fracturing simulation experiments of 45° deviated well are carried through 400mm3 cement specimen so as to obtain the fracture initiation point and geometric shape under different perforation angles, the results verify the accuracy of the numerical simulation method.
Coal in China
Authors: Mei Yong
Published: March 2013

This study analyzes China’s coal industry by focusing on five related areas, namely, resource flow, coal consumption, carbon footprint, accidents and deaths and international opinions.
Efficiency Comparison in Chinese Construction Industry Based on Data Envelopment Analysis and Super Efficiency Data Envelopment Analysis
Authors: Gao You Min , Wang Xiao Wen
Published: March 2013

Construction industry is a main industry in national economy, Chinese construction industry has made huge achievement, but the developments between different provinces in China are imbalanced. To compare the different efficiencies between them, data envelopment analysis and an important extended means of DEA were introduced, compared and applied in empirical analysis of Chinese construction industry efficiency between different provinces based on statistical data. Then some conclusions and advices were reached in the end.
Research on Geological Tourism Resources of Lingchuan-Wangmangling National Geopark
Authors: Wang Yan Hong , Wu Fa Dong , Xu Yuan Yuan
Published: March 2013

Lingchuan National Geopark, a place where has many kinds of geoheritages, unique natural landscape, profound cultural history, graceful ecologic environment. This article differentiated and evaluatedmain tourism resources in the geopark by the detailed investigation and research.Considering the situations of tourism resource development and Special geoheritages resources (karst and Canyon resources)in the geopark, department in charge was suggested to take appropriate method to developtourism resources and protect geoheritage resources.
Research on Fairway Condition for Safety Navigation in Bridge Waters
Authors: Ai Wan Zheng , Hu Bo Hua
Published: March 2013

Bridge construction can promote economic development, but if the bridge layout is unreasonable, it would hinder ship’s safety navigation in the bridge area. There is little reference for fairway width design about curved bridge channel in inland river navigation standards of China. The fairway conditions for ship safety navigation in bridge waters were discussed in this paper, and the mentioned determination methods for fairway dimension in bridge waters in this paper can provide some reference to solve other channel design problem.
A New Method to Estimate Rock Mechanics Composed both the Dynamic and Static Test Means
Authors: Yi Xin Bin , Ding Yun Hong , Wang Xin , Lu Hai Bing
Published: March 2013

The reasonable estimate of rock mechanics is extremely important to the design of hydraulic fracture, but the direct triaxial test is a high consumption of time and money. The relation between the dynamic rock mass parameters and the static ones could be used to establish a new method to assess rock mechanics. This new method which was composed by some formulations generated by the well logging data and the Hoek-Brown criterion with the iterative computation way could provide calculated GSI, Young modulus and Poisson ratio data. These data has a little deviation, less than 10% which can be acceptable in project scope, with triaxial test value of rock core. As a result, this method has been proved to be easy and credible to use.
Research on Deformation Stability of Soft Rock Slope under Excavation Based on FLAC3D
Authors: Guo Fang , Gu Wei , Tang Jie Jun , Murong Ming Hai
Published: March 2013

In order to study deformation and stability of soft rock slope in excavation process, the deformation, plastic area distribution, and the change of safety factor of example slope based on FLAC3D software were studied in this paper. Results show that: (1) the vertical and horizontal displacement of slope gradually increase with excavation; (2) in the process of slope excavation, tension plastic zone occurs in slope surface, and shear plastic zone with connected properties gradually forms internally; (3) based on the strength reduction method and limit equilibrium method calculation, the safety factor of slope gradually reduces with excavation, and adopting the construction form of excavation with supporting meantime is very necessary.
Experimental Techniques for Mechanical Properties of Gas Hydrate-Bearing Sediments
Authors: Zhang Jian , Ye Yu Guang , Liu Chang Ling , Sun Zhong Ming , Zhang Lei , Diao Shao Bo , Cheng Jun
Published: March 2013

The mechanical properties of gas hydrate-bearing sediments are important basic parameters during natural gas hydrate drilling and exploitation. It’s very hard to get and preserve the actual gas hydrate specimens for the measurements of these characteristics. Experimental techniques for mechanical properties of gas hydrate-bearing sediments are essential and unique because of the special high pressure and low temperature conditions for the stability of gas hydrate. Qingdao Institute of Marine Geology has developed an experimental equipment (Chinese National patent No. ZL 2010 2 0253067.3) to study the variation of mechanical properties along with gas hydrate saturation in different sediments. The combination, configuration and advantages of the equipment, as well as some preliminary experimental results were introduced in this article.
Small Scale Effect on Boundary Conditions of Cantilever Single Carbon Nanotubes
Authors: Li Ming , Zheng Hui Ming , Xia Luo , Yang Liu
Published: March 2013

In this paper, the boundary condition on free vibration of cantilever single-walled carbon nanotubes (SWCNTs) with Winkler elastic medium is investigated. The Euler beam theory with nonlocal elasticity is modeled as SWCNT. The analytical solution is derived and the numerical results show that the additional boundary conditions from small scale do not change natural frequencies. The reason is that the additional work made by the moment and shear force at the free end from small scale effect cancel each other, the boundary conditions due to local elasticity and nonlocal elasticity are also equivalent. Thus for simplicity, one can apply the local boundary condition to replace the small scale boundary condition.
The Principle of Effective Stress Theory Research Based on Channel Rate
Authors: Wu Xiao Feng , Li Guang Fan , He Wan Cheng
Published: March 2013

Based on the debate of effective stress principle applicability on cohesive soil in recent years and the predecessor's research achievements, this paper puts forward the idea that the effective stress surface including hydrated film surrounding soil particles. And we obtained the extended soil effective stress equation by establishment of the model of channel rate.Combined with the physical significance of permeability coefficient and substantial experimental data, it can establish the fitting equation between permeability coefficient and new proposed physical parameter channel rate. A new calculation method to unify the separate calculation and combined calculation of water and earth pressures is proposed to carry out the transition between results of the two conventional calculation methods and provide a new idea for solving the jump problem between the two results.
Analysis of Displacement and Deformation Caused by Underground Mining in one Coal Mine of China
Authors: Liang Xu Li , Li Fang Hong
Published: March 2013

A hyperbolic tangent function model was used to make analysis for the rock mass displacement and deformation caused by underground mining, the model is verified correctness through real engineering practice. The cracking damage of the above buildings was analyzed using the model; the result could provide guidance for the underground mining and safe production.
Numerical Simulation of Unsteady Flow around Ahmed Body with Active Flow Control
Authors: Wang Bing Xin , Hui Zhu , Yang Zhi Gang
Published: March 2013

The numerical investigations presented in this paper deal with active flow control approach at the rear end of the Ahmed body model with the slant angle of 25°.Results of the velocity, pressure and vorticity field demonstrate the main reasons that cause the pressure drag. The influence of the spanwise and streamwise vortices rolling up from the slant and the edges on the recirculation zone behind the body is examined. A control slot is set on the separated line at the conjunction of the roof and the slant. Two different actuation concepts by blowing and suction steady jets through the slot lead to a drug increase of 5.61% and a drug reduction of 13.20% with the efficiency of 12.53% respectively.
A Multi-Scale and Level Set Algorithm for the Inverse Problem of Wave Equation
Authors: He Ying , He Chun Yan
Published: March 2013

In this paper, we construct the multi-scale and level set algorithm of the parameter recovery for the elastic wave equations in the fluid-saturated porous media. Firstly, based on the Biot theory, we apply the multi-scale method to simulate the propagation of 2-D elastic wave in fluid-saturated porous media. Secondly, the level set method is introduced to the general parameter estimation problem.
Finite Element Mechanical Analysis of Cushion Seals in High Speed Pneumatic Cylinder
Authors: Zhang Ri Hong , Shi Jun Xia , Hu Ji Wen
Published: March 2013

The design of pneumatic cylinder seals is in accordance with the theory of fluid elastic tight seal. The sealing mechanism depends on the contact force which is created by the interference of initial elastic seal assembly and the sealing force which is created by the working fluid acting on the elastomeric material. In the high-speed pneumatic cylinder, the buffer structure enables the piston decelerates rapidly and stops stably. When the buffer stage begins, it will produce a strong dynamic contact between the cushion seals and the cushion spear. After the failure of cushion seals happen，the buffering capacity will be declined sharply. Therefore, the mechanical properties analysis of the cushion seals becomes very important. The material characteristics and the magnitude of interference of the cushion seals as well as the operating speed of the cylinder piston have a large impact on the life of the cushion seals. In this paper, based on the finite element analysis software ABAQUS, it provides certain reference value for the cushion seals material selection and structural parameters.
Non-Newtonian Fluid Flow and Heat Transfer in Microchannels
Authors: Chen Chien Hsin , Hwang Yunn Lin , Hwang Shen Jenn
Published: March 2013

Convective heat transfer of non-Newtonian power-law fluids in a microchannel is investigated. The governing parameters include the flow behavior index, the length scale ratio (ratio of Debye length to half channel height), the Joule heating parameter (ratio of Joule heating to surface heat flux), and the Brinkman number. Analytical expressions are presented for velocity and temperature profiles, as well as the Nusselt number. The flow and heat transfer parameters can be obtained by numerical integrations of the analytical expressions. The dimensionless temperature distribution across the microchannel and the fully-developed Nusselt number are illustrated for a wide range of governing parameters.
Numerical Simulation of Underwater Ellipsoid Motion near Free Surface
Authors: Dong Xu , Wang Ya Xing , Li Ye , Zeng Li
Published: March 2013

To analyze hydrodynamic characteristics of small scale body motion near free surface, finite volume method was adopt to compute incompressible Reynolds Averaged N-S (RANS) equations, numerical methods were conducted to simulate changes of drag coefficient and surface shape when moving near free surface. VOF method with Geo-Reconstruct form was used to deal with free surface. Fully developed turbulent flow can be solved by RNG k-ε model, and near wall region by near-wall functions. Quick upwind schemes were used to overcome instability problem when simulating high Reynolds flow. The results showed that VOF method, combined with RNG k-ε model, can be put to use to numerically simulate underwater body moving near free surface, and catch shape change of free surface in high Froude number.
Influence of Rolling Bearing Steel Ball Temperature Deformation on Radial Clearance
Authors: Wang Xiao Zeng , Yang Jiu Hong
Published: March 2013

According to theory of thermoelasticity, the paper deduces the formulas of the rolling bearing steel ball transient temperature, radial stress, tangential stress, radial displacement, and radial clearance, analyzes the influence of the temperature deformation on the radial clearance. The result shows that the radial displacement changes slowly on the surface, reaches the maximum when temperature becomes stable. The reduction value of the radial clearance is the linear function of the temperature and position. Fitness formula is adopted to calculate the radial clearance in the different temperature and radius. The error is less than 0.2% and 0.18%. The radial clearance formula is used to calculate the bearing’s maximum working temperature when the radial clearance reaches the standard radial clearance to ensure the reliable work of the bearing.
Singular Cell Adaptive Method for Adaptively Refined Cartesian Grid in the Simulation of Flow around Airfoil
Authors: Han Yu Qi , Gao Lin , Gao Ge
Published: March 2013

A novel adaptive method for singular geometric regions was proposed. Combined with conventional cut cell adaption, curvature cell adaption and solution adaption, adaptively refined Cartesian grid was automatically generated after geometries had been specified by users. Solid wall boundary was implemented by ghost body-cell method which efficiently relieved the time step restriction of small cut cells. Flow field was well resolved on adaptively refined Cartesian grid with finite volume method. Transonic flow around the RAE2822 airfoil and subsonic flow around the Suddhoo four-element airfoil are carefully investigated, which validate the efficiency of current approach and its feasibility in complicated geometric regions.
Finite Element Analysis of Airflow Field for Vacuum Chamber in Air-Suction Seed Metering Device of No-Till Seeder
Authors: Liu Yue Qin , Zhao Man Quan , Hu Yong Wen
Published: March 2013

In order to study the impact of the different structures in the air-suction seed metering device of no-tillage planter on seeding performance, based on the structural characteristics of vacuum chamber in air-suction seed metering device of no-tillage planter, the air flow finite element analysis of air-suction seed metering device and experimental verification were did. Mainly the law of the distribution of airflow field and seeding performance of the vacuum chamber under the situation of the different distribution diameters of the suction hole were studied in this paper. The result shows that the adsorption performance is best when the suction hole distribution diameter is 150 mm. The conclusion can provide a reference for structural optimization and performance improvement of the air-suction seed metering device of no-tillage planter.
Mechanical Model and Finite-Element Simulation Analysis of Hemp Stalk
Authors: Liu Xue Qiang , Zhang Jian Chun , Yang Han , Zhang Xiang Hong
Published: March 2013

It is assumed that hemp stalk, bast fibre and xylem are the geometrical model of hollow cylinder on the basis of getting the average size and the average elastic constants. The stress and strain distributions of hemp stalk under the transversely even-distributed load are analyzed through ANSYS software. According to the geometrical size and the material attributes of peeling roller, the dynamic simulation model of roller and hemp stalk is built.
A Study on Elliptical Gas Flow in Double Porosity Gas Reservoirs
Authors: Zhang Xiao Tao , Yang Ji Yuan , Xie Jin Xuan
Published: March 2013

Elliptical flow exists in the near vertical fracture area, or in anisotropic reservoirs, and the classical radial flow models cannot provide complete analysis for elliptical flow. This paper presents a mathematic model for gas elliptical flow in double porosity gas reservoirs. The differential equation of gas flow is written in Mathieu equation, so that the solution can be expressed also by Mathieu functions. The numerical calculation of relevant Mathieu functions , and its derivative is done to obtain the dimensionless pseudo pressure drop in Laplace space. Property sensitivities of double porosity systems including combination of , parameter related to anisotropy, storativity ratio , interporosity flow coefficient are studied by using the Laplace numerical inversion. The new solution not only includes factors considered for classic solutions in previous papers, but also incorporates the effect of reservoir anisotropy. It is kind of modification and supplementation to classic solutions.
Research on the Coarse Particles Velocity Characteristic in Fluidized Bed
Authors: Fan Jin He , Li Hui , Fan Hai Hong
Published: March 2013

In order to understand the particle velocity distribution characteristics of the 2D bubbling fluidized bed. The paper study that several mainly factors (static bed height, particle size and gas speed) influence on velocity distribution of the outer particles by experiment. The results for particles around bubble show that: ①Under the condition of the same static bed height and particle size, the particle velocity increases with the gas speed; the particle velocity increase at the axial direction and has no rule at radial direction. ②On the basis of the same wind speed and particle size, the particle velocity reduce with the static bed height; the particle velocity decreases at the axial direction and has no regular at radial direction. ③At the same wind speed and static bed height, the particle velocity is gradual reducing with the particle size; the particle velocity also reduce at the axial direction and has no rule at radial direction.
Numerical Analysis of Aerodynamic Noise of a New High-Speed Train
Authors: Chen Wei , Wu Song Ping
Published: March 2013

Along with the raising of the train speed, aerodynamic noise of the high-speed train is generated more and more significantly and their reduction has become one of the key factors to control noise of the high-speed train. Aerodynamic noise radiated from the high-speed train surface was analyzed numerically. The mathematical and physical models of the three dimensional flow field of the high-speed train were established and the external steady and unsteady flow fields of the high-speed train were calculated by using the standard "k-ε" turbulence model and large eddy simulation (LES) respectively. On the basis of the steady flow field, aerodynamic noise sources on the car body surface of the high-speed train are calculated by using the broadband noise source model. On the basis of the unsteady flow field, the time domain characteristics of fluctuating pressures on the car body surface are analyzed. The sound pressure level on the surface pressure demonstrating is calculated and the flow field of some critical parts is analyzed.
Impact Response of Circular Tube with Concentric Plunger
Authors: Ab Ghani Amir Radzi , Lukman Hafizi , Hashim Hafizan
Published: March 2013

Thin-walled tubes are generally used as impact energy absorber in various application due to their ease of fabrication and installation, high energy absorption capacity and long stroke. However, the main drawback of plain tube is the high initial peak force. A concentric plunger in the form of tapered block is proposed to overcome this shortcoming while at the same time, improving the impact performance. Static and dynamic axial crushing were performed to determine the initial peak force (IPF), crush force efficiency (CFE) and specific energy absorption (SEA) for the concentric plunger with various taper angles. It was found that the concentric plunger affected the tube impact response. Comparison with plain circular tube was carried out and it was found that the concentric plunger improved the impact response of the tube especially in term of initial peak force.
Research on the Dynamic Response of Floating Foundation of a Tri-Floater Offshore Wind Turbine
Authors: Yao Zhuang Le , Chen Chao He , Chen Yuan Ming
Published: March 2013

In this paper, the overall finite element model is established, to analyze the small-sized floating foundation of a tri-floater and to make a local optimization on the stress concentration area. The transfer functions and the response spectrums of wave load and motion of floating wind turbine system are calculated by AQWA. Besides the concept of the floating foundation group is put forward in this paper. It is small in structure, easy to assemble, and it can be developed for any power of wind field.This concept has a certain reference value for the development of offshore wind industry in China.
A Method for Improving Envelope Spectrum Symptom of Fault Rolling Bearing Based on the Auto-Correlation Acceleration Signal
Authors: Guo Yu Jie , Liu Jing Yu , Li Jie , Liu Zhan Hui , Zhang Wen Tao
Published: March 2013

Envelope analysis is the popular fault diagnosis method of rolling bearing. It can diagnosis rolling bearing fault, such as inner race fault and outer race fault. The traditional envelope analysis is set up on the measured acceleration signal. It is influenced by noise seriously, especially in bearing early fault stage. Research shows that the amplitude modulation phenomenon can be enlarged if the envelope analysis is done for the auto-correlation signal. Vibration test was done for a driving motor with fault rolling bearing. Factors influencing the effect of envelope analysis were analyzed.
Research on Dynamic Transfer Performance of High-Speed Wheel Set
Authors: Shi Xiao Ling , Xie Ji Long , Yuan Yu Qing , Zhao Fang Wei
Published: March 2013

The parameters of high speed trailer wheel were identified by modal test using hammering method. Based on the actual measured dynamic stress data, the frequency spectrum was obtained and the transfer function was analyzed. Compared the results of the frequency spectrum analysis and the modal parameters of the wheel set, the primary frequency in frequency analysis and all the frequencies with higher amplitude in the transfer function were far from the natural frequency of the wheel set. The results show that the train is safe running on high speed line.
The Static Analysis about Complicated-Welded on Tubular Rectangle-Joints
Authors: Jiao Jin Feng , Wu Han , Shi Xue Dong , Lei Hong Gang
Published: March 2013

Welded rectangular steel tubular joints have been widely used in large span complicated steel structure engineering .With the type of the joints and structural measures complicated, there is no suitable joints theory formula in design specifications. In this paper, two different structural measures types of umbrella steel truss # 8 joints and 68 # joints in a Railway Station are static analysis ,which is by means of finite element software ANSYS and based on the principle of the joints member loading simultaneously. The analysis results show that: in the case of the joints member loading simultaneously, the carrying capacity variation of each member is not uniform coordination; With the different angle between the branch pipe of joints and main pipe, the changes of the degree of stress concentration in the four side surfaces of the member is different. The maximum difference is about 2-fold; compared 68 #joint with 8 # joint, its degree of stress concentration on the overall is small, which prove that structural measures of its domain joints is reasonable.
Study on Dynamic Response Test of Long Span PC Girder Bridge under the Operating Conditions
Authors: Chen Xiao Dong , Liu Xia Ping , Sun Zhuo , Cai Ka Hong , Yang Hong
Published: March 2013

In this paper, based on the Guangzhou Pazhou Bridge ,the acceleration and dynamic deflection was tested synchronously under normal operating conditions. Power spectral density analysis of the measured signal was done with frequency domain analysis methods.The measured value was compared with the finite element calculated value.The studies are as follows: first, the acceleration and deflection power spectral density function shows a multimodal distribution；the vibration frequency is concentrated in the low frequency range；the bridge vibration energy is concentrated in the first three frequency.Second, the actual operating conditions of Pazhou Bridge is good and it has a good bearing capacity. Third，the bridge impact coefficient measured maximum value is much greater than the national specification values.The researchs can provide the basic data for study on bridge health monitoring system development and bridge vibration signal separation technique.
A Study on the Force Distribution for Artificial Antagonistic Muscles
Authors: Yang Hou Zhong , Duan Xiao Gang , Deng Hua
Published: March 2013

The muscle of the body’s joint always appears in the form of a pair of antagonistic muscles. Based on the establishment of the humanoid elbow joint’s mathematical model and focused on the force distribution of the antagonistic muscles, a force distribution system consisted of a fuzzy controller and a force distribution planner is proposed. The fuzzy controller is used to ensure the control performance of the whole system and the force distribution planner to implement the force distribution of the flexor and extensor. The simulation show that in the case of confirming the good control performance, the system can get different force distribution results through regulating the algorithm and parameters of the force distribution planner. Among these,we can find a more suitable and energy-efficient way to distribute the force.
Design and Application of Solar Mobile Power Based on Single Chip Microcomputer
Authors: Zhang Qiao Jie , Xiong Ming
Published: March 2013

A solar mobile power based on single chip microcomputer (SCM) is proposed in this paper, which has the functions of charge control, power management, communication, voltage\current\temperature detection and protection. This paper takes wireless sensor as its research object, conducting experimental research in the charging\discharging character of the solar mobile power and the accuracy of its residual capacity prediction algorithm. The results show that the maximum error of the current is 4.8% during the constant current charging process, while the maximum error of the voltage is 0.05% during the constant voltage charging process. Besides, the discharging character and residual capacity prediction accuracy can also guarantee the quality of power supply.
Computing Areas of Pinched Hysteresis Loops of Mem-Systems in OrCAD PSPICE
Authors: Biolek Dalibor , Biolek Zdenek , Biolkova Viera , Kolka Zdenek
Published: March 2013

The pinched hysteresis loop belongs to the fingerprints of the so-called mem-systems, their well-known special cases being memristors. The memory effect of the system is determined by the area of the curve lobes which gradually decrease with increasing repeating frequency of the excitation signal. The paper describes a method for automated computation of the above areas via the commonly utilized OrCAD PSpice simulation software with the help of special measuring functions of the PROBE postprocessor. The usefulness of the method is illustrated on an example of the analysis of a TiO2 memristor.
A New Period Detecting Method for Periodic Signal Based on Singular Value Decomposition
Authors: Zeng Zuo Qin , Zheng Li Xin
Published: March 2013

This paper firstly starts from the theory research of singular value ratio (SVR) spectrum and discusses the invalid reason of this spectrum and its improved one in some period detection. Then, on this basis, we put forward a new method utilizing delayed way to change the internal element arrangement of a fixed structure matrix to solve the invalid problem and realize reliable period detection for periodic signal. After that, we study the best number of row and column for constructing this matrix and propose the period judging principle. Finally, by contrast, the validity and superiority of the proposed method are verified in the processing of rotor system signal.
Design and Performance Evaluation of Tactile Device Using MR Fluid
Authors: Kim Jin Kyu , Choi Seung Bok
Published: March 2013

This paper proposes a novel type of tactile device using magnetorheological (MR) fluid which can be applied in minimally invasive surgery (MIS) robotic system. The remarkable feature of rheological properties of MR fluid by the intensity of the magnetic field makes this potential candidate of the tactile device. As the first step, in order to determine proper input magnetic field the repulsive forces of the real body parts such as hand and neck are measured. Secondly, an appropriate size of the tactile device is designed and manufactured base on magnetic analysis. The final step of this study is to measure the repulsive forces of dividing 5 areas in the tactile device.
Edge Detection with Information Measure and Support Vector Machine
Authors: Wang Pei
Published: March 2013

It is presented a novel method for image edge detection with information measure and Support Vector Machine, which is called EDWIS (edge detection with information measure and support vector machine). Both the theory analyses and the experimental results show that EDWIS not only can effectively reduce the noises of the image, but also can precisely realize the edge-position, and keep the image edges’ details well. For three kinds of images, two of them including noise, the edge detection results of EDWIS are better than those of Canny, or Sobel differential operator.
The Ancient Ceramics Identification Methods Based on Non-Linear Support Vector Machines
Authors: Zhang Ru
Published: March 2013

With the ceramics market's developing, the use of image processing and intelligent algorithm is applied to the ancient ceramics recognition and appreciation is one of the most challenging issues in the field of ancient ceramics. Article focuses on selected Ming Qing Dynasty blue and white porcelain as research samples, and explore how to extract the effective image recognition features of ancient ceramics, and to quantify the comparison, given the ancient craft of evaluation index system, and improve the identification of categories of, and appreciation evaluation model to extract special recognition feature, image preprocessing, discussion handwritten the key technology of Chinese character segmentation, feature extraction and classifier design a variety of methods, and non-linear support vector machine analysis method using multiple classifiers based, so that the sample's accuracy greatly improved.
Application of Gabor Dictionary and SL0 Norm in Disguise Face Recognition
Authors: Zeng Jun Ying , Gan Jun Ying , Zhai Yi Kui
Published: March 2013

A fast sparse representation face recognition algorithm based on Gabor dictionary and SL0 norm is proposed in this paper. The Gabor filters, which could effectively extract local directional features of the image at multiple scales, are less sensitive to variations of illumination, expression and camouflage. SL0 algorithm, with the advantages of calculation speed，require fewer measurement values by continuously differentiable function approximation L0 norm and reconstructed sparse signal by minimizing the approximate L0 norm. The algorithm obtain the local feature face by extracting the Gabor face feature, reduce the dimensions by principal component analysis, fast sparse classify by the SL0 norm. Under camouflage condition, The algorithm block the Gabor facial feature and improve the speed of formation of the Gabor dictionary. The experimental results on AR face database show that the proposed algorithm can improve recognition speed and recognition rate to some extent and can generalize well to the face recognition, even with a few training image per class.
Power Spectrum Estimation of the Welch Method Based on Imagery EEG
Authors: Zhao Li , He Yang
Published: March 2013

Welch method is a direct evolution from the periodogram method. Periodogram method is also commonly used in the power spectrum estimation, there are some inherent shortcomings in periodogram method, such as the variance and resolution of the spectrum estimation is not good, it does not satisfy the consistency estimation conditions and so on, so this paper uses improved periodogram method (welch method) to estimate the motor imagery EEG power spectrum, with Matlab for tools, through the simulation on the experimental data, comparativing and analysising the welch method’s different spectrum estimation properties with different window functions, which provides the theoretical guidance for selecting a suitable window function and makes the welch method play a good role in the EEG feature extraction.
An Efficient Algorithm for License Plate Recognition
Authors: Liu Zhong Yan , Yang Jian , Nie Hong Mei
Published: March 2013

The license plate recognition(LPR) is the key technology in intelligent transportation system. This paper discusses the whole process of license plate recognition technology, include the license plate image preprocessing, license plate location, character segmentation and character recognition, and simulated it by MATLAB. The experimental result show this method can obtain good recognition effect.
An Improved Algorithm Using B-Spline Weight Functions for Training Feedforward Neural Networks
Authors: Zhang Dai Yuan
Published: March 2013

An improved algorithm using B-splines as weight functions for training neural networks is proposed. There is no need for training neural networks or solving linear equations. The most important advantage is that we can get the forms of weight functions by the given patterns directly. Each of weight function is a one-variable function and takes one associated input point (input neuron) as its argument. The form of each weight function is a linear combination of some B-splines defined on the sets of given input variables (input knots or input patterns), whose coefficients are associated with the given output patterns. Some examples are presented to illustrate good performance of the new algorithm.
Application of Hybrid Algorithm to Real-Time Face Recognition
Authors: Wang Chi Jo , Chiou Juing Shian , Hu Yu Chia
Published: March 2013

This paper proposed the principal component analysis (PCA) and support vector machine-genetic algorithm (SVM-GA) to the real-time face recognition. The integrated scheme aims to apply the SVM-GA method to improve the validity of PCA based real-time recognition systems. Experimental results show that the proposed method simplifies features effectively and obtains a higher classification accuracy.
A New Denoising Approach for Optical Coherence Tomography Image Based on the Total Variational Model
Authors: Liu Jing , Tian Xiao Lin , Sun Yan Kui
Published: March 2013

The traditional total variational (TV) model performs well for most noise image. However, the method will lose some information and details for the image which has rich texture and tiny boundary. Therefore, according to the requirements of the OCT pearl image, a novel denoising approach based on the TV model is proposed in this paper. This method combined the adaptive image denoising model and the novel fidelity term. Numerical experiments show that the proposed method can remove the noise while preserving significant image details. At pearl OCT image the method achieves at least 0.1dB gain over other existing denoising methods for Signal-Noise Ratio (SNR) measurement and Peak Signal-Noise Ratio (PSNR) measurement.
Hyper-Chaotic Cat Map and its Application in Image Processing
Authors: Zhang Chao Xia
Published: March 2013

In this paper, a digital image encryption scheme is investigated based on n dimensional (n-D) generalized hyper-chaotic cat map. Firstly, the transformation matrix in n-D map is constructed by using n(n-1)/2 transformation sub-matrix multiplication. Secondly, a novel approach is proposed that the possible sorting numbers of transformation sub-matrix multiplication are used as encrypted keys, which is applied to image encryption. It is the first time in the literature to report the image encryption scheme based on high dimensional hyper-chaotic cat map. Both theoretical analysis and numerical experiment results have confirmed the feasibility of the proposed method.
Test Method of Suspension Kinematics and Compliance
Authors: Zhan Jun , Lu Jiang Li , Guan Xin
Published: March 2013

For the wide use of the suspension K&C test rig, this paper presents the basic requirements of the vehicle suspension K&C test and provides a reference for unifying the test methods and the test standards. Then, it also gives the specific test specifications and requirements of the vertical wheel jump test, the roll test, the longitudinal force test, and the lateral force test. Finally, the main indicators of the suspension, the steering system and the tire can be obtained.
Adaptive Coordination Control of Multi-Agent Systems with Switching Topologies and Unknown Nonlinear Dynamics
Authors: Liu Gao Yang , Yu Hui , Zhang Yi
Published: March 2013

In this paper, we study the leader-following adaptive consensus problem for multi-agent systems with unknown nonlinear dynamics. The topologies of the networks are switching. A novel adaptive consensus algorithm is proposed by using linear parameterizations of unknown nonlinear dynamics of all agents. By stability analysis and parameter convergence analysis of the proposed algorithm, adaptive consensus can be realized based on neighboring graphs. The stability analysis is based on algebraic graph theory and Lyapunov theory, the PE condition plays a key role in parameter convergence analysis. Example is given to validate the theoretical results.