bluuebunny/crossref_metadata_2025 huggingface dataset:
Aero-Engine Vibration Fault Diagnosis Based on Harmonic Wavelet
Authors: Xu Tao , Jin Yan , Xu Jin
Published: March 2012

Because of the complicated structure of rollers, it is very difficult to diagnosis aero-engine vibration fault. Harmonic wavelet method is proposed target towards whole-body vibration of aero-engine in this paper. To implement vibration fault diagnosis of Aero-engine, vibration signals are presented with time-frequency and spectrum of coefficients after harmonic wavelet transform. The designed method overcome noise disturbance and energy leakage and possesses better performance for aero-engine vibration analysis compared with traditional wavelet analysis method. With the vibration data from whole-body vibration experiment, the effectiveness of the designed method is illustrated and it could identify three classical vibration faulty modes accurately, which provides a better method for whole-body vibration fault diagnosis of Aero-engine.
Comparative Study on Optimization Design Methods of Steering Mechanism
Authors: Lin Jing Gao , Yang Jue , Zhang Wen Ming
Published: March 2012

In the paper, analysis and comparison is made for different optimization design methods of the separation steering trapezoidal mechanism based on the steering system of 170 tons mining dump truck. The optimal design method is obtained, and research shows that the steering mechanism analysis method introduced in many automotive design textbooks has errors and should be improved.
Experimental Study of Heat Pipe Exchanger for High Power LED Cooling System
Authors: Gou Yun Jun , Zhong Xiao Hui
Published: March 2012

A new cooling concept for high power LED street lamp by combining the heat release of high power LED with two-phase heat transfer heat pipes was proposed, and in this study a series of heat pipes with specific fins structure were developed. Through experimental results, we found the new heat pipe heat exchangers have the features of higher efficiency of heat dissipation and more compact construction which meets the demand of heat dissipation for high power LED than the traditional heat pipe heat exchangers and the new exchanger with outwards-radiate structure has the best heat dissipation performance.
Developing on Experiment System of Process Equipment and Control Engineering Based on PC and PLC
Authors: Han Jun , Chang Rui Li
Published: March 2012

Being established in the requirement of teaching and practice, and connecting to the development of process equipment and control engineering specialty, a suit of experiment teaching instrument is designed, which relates to process control, automation, survey and control and correlative specialties. By the instrument, students can taste the actualizing of process equipment control and the application of advanced technology when learning engineering theory. This stimulates their enthusiasm in specialty courses study and enhances their practice capability and creative thinking
Numerical Simulation on Dynamic Analysis for Pipe Vibration Control Based on an Actively Generated Hydraulic Excitation Force
Authors: Wu Juan , Zhang Hui Xian , Kou Zi Ming , Lu Chun Yue
Published: March 2012

In order to study dynamic characteristics of fluid filled pipe under hydraulic excitation force generated actively by a new developed vibration exciter, at first mathematical model of pulsating fluid was established and a computer code based on the method of characteristics (MOC) was developed. Then the excitation force calculated by MOC was forced upon the corresponding nodes of finite element of pipe, meanwhile, the nodes of fluid by MOC were assured to coincide with that of the pipe by the method of finite element (FEM). Finally, using Newmark’s method, the dynamic response at every cross section of pipe was solved. The numerical simulations show that a simple harmonic motion arises at every cross section of the pipe. The lateral vibration amplitude of every node along the pipe increases as the rising system pressure. So, this work is expected to provide some theoretical and exploratory basis for studying two dimensional vibration characteristics of fluid filled pipe.
Mechanism Study on the Grading of the 5BF-3 Fruits Grading Machine
Authors: Zhou Xiao Rong
Published: March 2012

The physical experiment study of affecting factors for fruits grading rate is presented by means of the 5BF-3 fruits grading machine and is applying the design of four factors quadratic regression general rotary to grade the spheroid fruit citrus. By using virtual simulation and dynamic to dynamically analyze the test results, ascertain the grading rate influence mechanism of the grading transportation chain speed at the stage of artificially chosen, fruits conveyer belt speed, the fruit graded wooden roller speed and the friction coefficient of the 5BF-3 fruits grading machine are verified.
Modeling and Simulation of Inert Gas System for Dangerous Cargo Tankers
Authors: Su Shu , Shang Q.M. , Chen H.
Published: March 2012

This Inert gas system (IGS) plays an important role in fire-prevention and anti-explosion for dangerous cargo tanker. Development of an operation simulation system of IGS is useful for technology studying, technician training and cost savings. Based on analysis of IGS working principle and system structure, this paper develops an IGS simulation system, which can be used for simulation studies about IGS operations.
Process of Micro-Simulation of Infilitration Clogging for Highland Reservoir Dam Foundation
Authors: Wang Yuan Yuan , Wang Gang Cheng , Cao Yu
Published: March 2012

Using of numerical models of particle flow are based on discrete element theory, combining with the indoor infiltration clogging tests in the region of south mountain in Tibet, the whole development process of the infiltration clogging of loose foundation is simulated. The loss volume, fluid velocity，osmotic coefficient, porosity and moving track of particle samples are recorded and traced in the analytical model, which reveals the water-soil interaction throughout the whole process of the infiltration clogging. The results show that clogging often occurs in the upper soil. Particle trajectory is random reveals the certain randomness of formation of pores. Results of simulation are consistent with the indoor test, to some extent, which validate the feasibility of numerical method in infiltration clogging research. These results provide certain useful data for the further study of infiltration clogging, and also provide a new way for interpretation and analysis of penetration clogging phenomenon in micro-scale .
A Method for Path Generation of Robot Automatic Polishing Based on Bounding Box
Authors: Han Li Li , Zhang Qing Wei , Jia Kai
Published: March 2012

In order to solve the problem of high intensity and low efficiency by manual labor during the polishing machining of mold free-form surface, this paper present a method for path generation of robot automatic polishing based on bounding box. Firstly, ascertain the location and direction of the mold by constructing a box that is most close to the mold. Secondly, generate the tool path by introducing the improved direction-parallel machining. Finally, by using Visual C++6.0 development tool, the algorithm discussed above has been implemented and a software for trajectory generation has been developed. The results show that the method can generate the tool path better along the surface contour and is simple, effective. Besides, the software supplies a visible trajectory for robot polishing so that the unreasonable points can be modified before machining.
Design and Entity Modeling of Wet Double Clutch
Authors: Guo Xiao Lin , Pan Jia Ping , Sun Wei , Chen Gan
Published: March 2012

In this paper, we calculates the main parameters of a c-class car, choose the friction material, confirm the structural dimensions of pivotal components, acquires the friction power and heat capacity, and design three kinds of wet double clutch arranged radially with hydraulic driving unit, arranged longitudinally with hydraulic driving unit and arranged longitudinally with mechanical driving unit respectively according to the dimensions of interspaces. Finally, the entity modeling of each structure is established through the three-dimensional modeling software.
Research on Playing Board Process of Kimono Sleeves with Triangle under the Armpit Based on CAD System
Authors: Yi Dong Fang , Zhai Ya Li
Published: March 2012

Kimono sleeves have the very good functional for lack of seams between bodies and sleeves. But its playing board process is more complex especially with the triangle under the armpit. CAD is a new method of playing board and very popular currently in Chinese apparel industries. This paper researchs the playing board process of Kimono sleeves with the triangle under the armpit based on Richforever CAD system for clothing. This will help designers to use better CAD systems and improve the efficiency of playing board. Also this helps related person to know Chinese CAD softwares for clothing and promotes interpersonal exchange.
Multiple Integrators Control Based on Feature Data of Controlled System with Random Disturbance
Authors: Qiao Gui Hua
Published: March 2012

In order to solve the control problem under the environment with random disturbancel by means of the existing industrial PID controlling module, the multiple integrator control method based on feature data of the controlled object is proposed. This method is an extension of common PID control; it identifies the feature data of the controlled object with the inputting and outputting data firstly, then it deletes the differential control of common PID and extends the integrators in series or parallel connection to cancel the magnification of high-frequency random signal. With the feature data and reference control output, it calculates the controller’s parameters to improve the performance of control system. Simulation shows its feasibility and effectiveness.
Mobile Robot Movement Analysis and Design
Authors: Liu Xue Peng , Zhao Dong Mei
Published: March 2012

The mobile robot trajectory curve track and circular track arc analyzed. The stability condition of wheeled mobile robots is discussed. A new robots walk system design is presented. And the walking process is analyzed.
Research on Stray Current Monitoring of Subway Tracks
Authors: Zhang Dong Liang , Yang Yun Lin
Published: March 2012

This paper analyzes the cause of stray current of subway tracks, classifies the stray current, and explains the hazards. Based on this, the paper also summarizes the advantages and disadvantages of traditional monitoring technologies and current monitoring technologies, and applies the current CIPS detection technology to make simulation in the laboratory. The simulation result well reflects the distribution of stray current on the rail.
Research on a Combined Directional Instrument of DMC and Gyro for Vehicles
Authors: Feng Yi Bo , Li Xi Sheng , Zhang Xiao Juan
Published: March 2012

In the view of the disadvantages brought by DMC(digital magnetic compass) and gyro when they are used separately, a combined directional instrument composed by a 3-axes digital magnetic compass and a 3-axes MEMS gyro for vehicles is introduced, which is less influenced to the magnetic field interference and random drift. In the abnormal magnetic field, the MEMS gyro is used for correcting the heading angle of DMC. The experiment data shows that this instrument can output a stable and high-precision heading angle. It can be used to provide heading angle for vehicles.
Breast Tumor Recognition Based on Multiple Support Vector Machine
Authors: Jiang Hong , Chen Xi , Liu Bai Lin , Liu Yun Qing
Published: March 2012

In order to solve unfixed size and individual difference with the breast tumor, this paper provides a method of Multi-Support Vector Machine (MSVM) for breast tumor recognition. We take Support Vector Machine (SVM) on the eight direction of bump area to generate vector classifier and select Gauss kernel function as kernel function. The breast tumor recognition accuracy can reach 97.3% when σ=30. The experiment shows that the application of MSVM in breast tumor recognition can achieve good result, and provide the reliable basis for further medical diagnosis.
Road Stress-Absorbing Interlayer Mix Design Method
Authors: Xu Wen Yuan , Deng Chun Yao , Yang Hong Yu
Published: March 2012

The stress-absorbing interlayer of modified asphalt mixture studied in this report is a special asphalt pavement mixture. Capable of delaying the occurrence of reflection cracks, the asphalt mixture is mainly composed of aggregate passing through a 9.5 mm sieve, machine-made or natural sand, and modified asphalt binder.
Research on Prospect and Strategy of Civil Engineering Informatization
Authors: Jiang Shun Ji
Published: March 2012

Applying information technology in industry has been an irreversible trend now. Based on information technology, civil engineering industry is experiencing revolutionary progress in management level and construction technology. This paper mainly focuses on the significance and some key elements for building the information system in civil engineering and gives a brief series of suggestions, wishing to help establish an efficient and transparent industry, further seeking highest operation efficiency and maximum economic profits.
Simulation Analysis of a Novel Magnetic Gear
Authors: Man Yong Kui , Hao Wen Sheng , Zhang Yi Sheng , Zhang Shuo , Zhang Jun Feng , Li Hua
Published: March 2012

Compared with mechanical gear, permanent magnetic gear has unique advantages which are high efficiency, noise free, zero friction, vibrationless, overload protection, etc. This paper introduced a novel coaxial magnetic gear with high speed radio and analyzed the efficient performance including peak torque, starting, braking, and no-loading procedures on the basis of calculating in finite element software Ansoft. The results prove that the novel magnetic gear is reasonable and efficient.
The Experimental Study about Relationship of Centrifugal Fan Shape and Tuyeres Wind Speed
Authors: Si Hai Bing , Zhou Chang , Liu Zhong , Lei Yi , Fang Wen Jie , Zhang Fa Jun
Published: March 2012

This paper mainly study the relationship between the different shape of air-out tube and the wind velocity based on variable frequency centrifugal fan.Several common shape of pipeline spouts were tested in the static environment in this experiment,the test results were made data process and theoretic original discussion,and we deduced a formula about the relationship between the effective velocity and distance.Finally,we obtained the reference valuable spout shape in the practical spray engineering.
Optimized Design for the Number of Injection Mold Cavities
Authors: Liu Yan Guo , Xu Chun Wei
Published: March 2012

The determination of the number of cavities is a very important part of the injection mold design process. In this paper, various factors influencing the number of cavities are analyzed comprehensively, a variety of methods are introduced for the calculation of the number of cavities, and the optimization principles for the reasonable choice of the number of cavities are proposed, for the reference of mold designers
Research on Dynamic Characteristic of the Rotors Connected by the Misaligned Gear Coupling
Authors: Lei Wen Ping , Han Jie , Li Ling Jun , Chen Lei
Published: March 2012

The misalignment of gear coupling is the most commonly observed fault in industry fields. It can cause great harm. In order to find out its physical mechanism and dynamic charactersic, a new Finite Element Modal of misaligned rotor-bearing system with gear coupling is presented in this paper. By considering the forces and moments which applied on rotor in two typical misaligned conditions, i.e. parallel and angular misalignment, the dynamic equation is established. Through simulation and dynamic analysis of two-span rotor system with misalignment, quantitive relationship between the misalignment and steady-state response is obtained. Meanwhile, an investigation on phase of twice rotational speed freqency (2X) reveals that in parallel misaligned condition, the phases of two sides of coupling are same, while in angular misalignment condition the phases are opposite (almost 180°difference). This feature can be used as an important reference when confirming a misalignment fault.
An Improved Simulated Annealing Algorithm Based on Genetic Algorithm
Authors: Li Shu Fei
Published: March 2012

An effective hybrid Simulated Annealing Algorithm based on Genetic Algorithm is proposed to apply to reservoir operation. Compared with other optimal methods, it is proved that SA-GA algorithm is a quite effective optimization method to solve reservoir operation problem. The simulated annealing algorithm is introduced to Genetic Algorithm, which is feasibility and validity. As a result of stronger ability of global search and better convergence property of SA-GA, and compared with other algorithms, the approximate global optimal solution would be obtained in little time. The operation speed is more quickness and the results are more stabilization by SA-GA, than Genetic Algorithm and the traditional Dynamic Programming and POA.
The Reconstruction Scheme Design and Experiment of the Height-Adjustable W-Beam Guardrail
Authors: Cui Hong Jun , Shen Xiao Jing , Liu Yu , Sun Xi Xin
Published: March 2012

Pave overlay to the freeway repeatedly causes the guardrail’s height lower and lower, which seriously influences its performance in protection and safety. The paper aims to work out a height-adjustable W-beam guardrail which is economic, feasible and safe to solve the shortage in barrier’s height causes from paving overlays by computer simulation tests and full-scale crash tests, which will improve the roadside safety of the guardrail and save the reconstruction cost.
Optimal Design of a Planar Five-Bar Parallel Manipulator Driven by Two Orthogonal Layout Actuators
Authors: Zhu Xiao Rong , Lu Yi , Shen Hui Ping
Published: March 2012

This paper addresses geometry design of a new kind of 2-DOF five-bar parallel manipulator actuated by two orthogonal layout linear actuators. Although the manipulator has only one geometric parameter, i.e., the link length, the distribution of performance index is more complex. Here, we propose a design approach utilizing a performance chart and local condition index. The key problem in the design of the manipulator is the determination of not the link length but the workspace satisfying the design index. This paper gives an effective method to obtain the basic good-condition workspace without dimension. Then, based on the optimum non-dimensional result, the optimum dimensional parameters are achieved which is suitable for the desired workspace. The optimum methodology of this paper is convenient and can be extended to other parallel manipulators
The Safe and Environmentally Sound Recycling of Ships and its Application in China
Authors: Du Zun Feng
Published: March 2012

Ship recycling is labour intensive and takes place largely in developing countries. Worker safety and environmental issues have clearly been focused by international community. In this paper, the hazardous wastes onboard were presented and the impact of these pollutants discharged from ship recycling was analyzed. Then, the current international conventions and standards were introduced. Herein, the Hong Kong International Convention for the Safe and Environmentally Sound Recycling of Ships, 2009 (the Hong Kong Convention), was mentioned in detail, including its background, main content and enforcement. Finally, China’s green ship recycling was investigated and some suggestions were proposed to our government and shipbreaking companies. In summary, ship recycling is facing to great opportunities and challenges. Only through the cooperation of the stakeholders, can ship recycling industry get the sustained development.
Core Characteristics of Server Virtualization and Functional Upgrading Issues
Authors: Gong Song Chun , Fu Song Yin , Chen Zheng
Published: March 2012

Server refers to computer software that manages resources and offers services to users. It is usually divided into a file server, database server and application program server. Server virtualization is an important trend of the server development. This paper makes relevant research on such aspects as the followings: the server virtualization technology; the characteristics of the server virtualization; and the difficult points of functional upgrading of the server virtualization and that optimization of the server performance is the fundamental aspect of upgrading. It hopes to play a promotion role for knowing the server virtualization in a better way.
Secure, Robust and Adaptive Echo-Based Information Hiding in Voice Communications for Equipment Maintenance in Marine Ships
Authors: Chen Hu
Published: March 2012

The maintenance of equipments in marine ships is a critical issue, in which the security of robustness of the communications between the marine ships and the base present foremost importance. As the communication link confronts bandwidth and delay constraints, it is challengeable to design an appropriate scheme. In this paper, we propose an echo-based information hiding scheme for addressing this problem. The confidentiality and integrity of the maintenance communications can be guaranteed. The robustness of the communication indicates the resilience to artificial tampering. The interaction for maintenance guidance can provide associated text or images via voice communications. Our echo-based method utilizes the sound echo delay to hide the information in the voices. The simulation verified that the scheme is secure and robust.
Virtual Prototype Design of No-Tillage Planter Based on Solidworks
Authors: Wu Shi Hong , Bao Wen Yu
Published: March 2012

No-tillage planter is researched by using virtual prototype technology and Each machine parts of no-tillage planter were modeled and simulated by solidworks software. the efficiency of the mechanical product development and design quality are improved, the development cycle is shorten, design cost is reduced. The simulation results show that ridge clearing coulter endpoint track, displacement, velocity and acceleration curve have been obtained through simulation are the same as theoretical analysis. The accuracy of theoretical analysis results is Verified, through the finite element analysis to residue breaking device of no-tillage planter, device stress, strain and displacement, and twisted, modal indexes under specified load are tested , providing the basis for further optimization design.
The Parameters Identification of Airplane Flutter Model Based Global Nonlinear Separable Least Square Method
Authors: Yao Jie , Wang Jian Hong
Published: March 2012

considering the noisy input-output data, this paper come up with an idea extending the deviation compensation least square (CLS)to the nonlinear separable least square (NSLS).The least square method employed nonlinear separable least square adaptive to the noisy situation is able to identify accurately the airplane flutter model parameters. Combining the transfer function model, this algorithm successfully converts the identification of noisy system into nonlinear separable least square problem. The square deviation of two noises and the model parameter of the transfer function can be estimated separately by using of above algorithm.
Research on the Rapid Response Production Preparation System for Compressor Blades of Aero-Engine
Authors: Shi Xiao Qiang , Zhang Shu Sheng , Li Shan , Ma Rui Xue
Published: March 2012

For improving currently the low manufacturing level and the long cycle of the production reparation period of aero-engine compressor blades, the rapid response production preparation system for compressor blades was proposed. Blade product line data was managed based on the process main model by the PDM platform to finish data sharing and integration. With the support of the process master model technology and the technical maturity, the cooperation of the process design and the process equipment design was achieved. Three subsystems about blade production were developed and integrated based on the PDM. It is proved that the system can improve the efficiency of the CNC processing and quality of compressor blades, meanwhile it can improve the utilization rate of CNC equipments, and excavate the potential of blade production lines.
Study on Ship Motion under Internal Sloshing Impacts
Authors: Wei Zhuo Bin , Xiong Xian Wei , Zhang Ning
Published: March 2012

The purpose of this paper was to investigate the internal liquid sloshing and its effects on the ship motion. A mechanical model of ship motion under sloshing impacts is described. The lateral sloshing forces are included in the model. The nonlinear dynamical system is introduced to describe the sway motion of the ship. The results of the numerical simulation and the effects of the internal sloshing loads are analyzed. The feasibility of the approach is thus verified.
The Single Straw Composite Board Manufacturing Process Research
Authors: Zhang Shi Cheng , Jiang Ya Ji , Pang Jiu Yin
Published: March 2012

This experiment used high temperature short cycle hot-pressing process suppress the single composite straw, found that the density decided single composite straw bending capacity, inside combinative strength and bibulous ply the inflation rate important factors, among which the effect of internal bond strength is more obvious.
A New Kind of Locking Device for Centrifuge Nacelle
Authors: Liu Qian , Deng Zhi Gang , Xiong Xin
Published: March 2012

In this paper, a new kind of locking device is introduced. Aiming at the 1# centrifuge of CAEP(China Academy of Engineering Physics), the mechanical design of locking device has been done, and its maximum locking torque is 8000N•M. The simulation model has been established in ANSYS to obtain key parameters of the locking device, such as the thickness of shaft, the distribution of circular groove, the working pressure of oil source and so on. Through the test, the feasibility of the locking device is validated.
Test on the Shape Schemes of Jilintai-I Hydropower Station Flood Discharge System
Authors: Zheng Wen Xin
Published: March 2012

According to the original scheme, the surface spillway tunnel of the Jilintai-I hydropower station flood discharge system was designed to be arranged separately, but not to be combined with diversion tunnel; the radial gate of the lower level spillway tunnel was designed not to have the vertical drop and lateral sudden enlargement, and the discharge structures at oblique tunnel were designed to be cancelled. In this paper, through the test on the hydraulic model, the analysis on the test results and many advisory demonstrations, multiple modifications and optimizations are made for the shape design of the axis, bottom slope and local structure of bottom slope and local structure, and also an analysis is conducted on the test results of the main shape scheme of surface spillway tunnel, and then the related opinions and suggestions are proposed according to the existing problems. The way of the pressured vertical drop and lateral sudden enlargement was ultimately used in lower level spillway tunnel of the hydropower station flood discharge system. Also, in this paper, the author makes a hydraulic test on the main shape design of lower level spillway tunnel based on the original scheme, and then an analysis is conducted on the test results and a final scheme is proposed according to the actual problems.
Research on Cooperative Equipment Maintenance Technology Supported Platform
Authors: Xing Yong , Chen Xiao Hu
Published: March 2012

To deal with problems of the front-line maintenance staff in technology support, a cooperative platform which is supported by maintenance techniques based on knowledge service is put forward. This thesis discusses its operational model and key techniques based on the analysis of its structure and functions. The platform provides the front-line workers with “one-stop” technology support and “customized” knowledge service to form a “win-win” and cooperative model which is secured by those departments related to equipment maintenance.
The Application of the Vector Control in Centrifuge
Authors: Ou Feng , Chen Hong , Xiong Xin
Published: March 2012

In order to ensure the stably operation for centrifuge, this paper presents a new speed regulation method based on the vector control technology, and designs the control system with the inverter for the centrifuge. The paper introduces the fundamental principal of vector control, and analyses the power and torque required for the centrifuge from the result of the calculation and simulation. At last, the paper shows the result the application of the vector control technology in centrifuge. The result shows that the vector control speed regulation system is simple, reliable, and its acceleration stability is very high. The analysis can also provide a reference for similar centrifuge design personnel
H∞ Dynamic Output Feedback Control for a Class of Discrete-Time Stochastic Systems with Sector Nonlinearities and Mixed Time-Delays
Authors: Ma Wei Jun , Hu Yan Mei , Zhang Xian
Published: March 2012

This paper deals with the dynamic output feedback control problem for a class of discrete-time stochastic systems involving sector nonlinearities and mixed time-delays. Based on the control theory and Lyapunov-Krasovskii functional method, an effective approach is proposed to design a dynamic output feedback controller such that the resultant closed-loop system is stochastically stable with a prescribed disturbance attention in the mean square sense and has a performance level. A numerical example demonstrates the effectiveness of the method.
The Model Analysis of Mobile Emergency Platform Car Frame Based on ANSYS
Authors: Gao Bo , Kou Zi Ming , Wu Juan
Published: March 2012

Mobile emergency platform is the carrier of mechanical and electrical equipment. The car frame vibration would make mechanical and electrical equipment failure even damaged. Mobile emergency platform car frame can be considered as the elastic vibration system with many degrees of freedom. Modal analysis is used to analyze the car frame. It is shown that the first natural frequency is 15.153 Hz and the second natural frequency is 19.579 Hz, which is close to20 Hz that is generated by the excitation frequency . Resonance is ocuuered. Optimization design is used to design car frame.After optimization design the natural frequency of car frame avoid the excitation frequency. Emergency mobile platform is environmental emergencies emergency treatment equipment, which video and audio monitoring equipment, wireless communications equipment , sophisticated electronic equipment and instrumentation need are carried in. When transportation or work process, these equipments, especially data-receiving treatment equipment, communications data transmission control equipment, image processing service and other equipment, will be affected inevitably even be failure for the mechanical vibration of the engine and the uneven road. If the equipment is damaged, the entire mobile platform of paralysis will be occurred. Car frame of mobile emergency platform can be considered as the elastic vibration system with many degrees of freedom and vibration led directly to the equipment failure. It is necessary to make modal analysis for the car frame.
Nuclear Polarization and Σ ¯ Atom Energy Levels
Authors: Wang Bing Zhang , You Yang Ming , Wang Ji You
Published: March 2012

Based on SIC-Xα the more rigorous method of calculating the electronic states for Ry dberg exchange parameters using a self-consistent field model, taking into account the Rydberg electron and the interaction between real atoms, the calculation does not include empirical parameters. Use this method to correct C.J.Batty nuclear polarization under optical model potential and theΣ Atom energy level transition, and the results compared with the classical method, the results to be much more accurate. For ultra-depth analysis of sub-atomic to provide a theoretical basis.
Emulation Analysis for Construction Process of High-Rise Building
Authors: Pei Fang Qiong , Zhang Qi Lin
Published: March 2012

Construction process design for high-rise building has been brought up by many researchers. In traditional design method, loads are applied to the structure once. Obviously, this is not the real loading condition. For concrete structure, shrinkage and creep during construction also effects on the structural deformation. An emulation analysis was done in this paper in an attempt to clarify the effect of construction process in structural analysis.
A R-p-da/dN-ΔK Surface Formula and the Statistical Analysis of Effects of Stress Ratio on Crack Growth for GC4 Steel
Authors: Wang Kun Qian , Xu Ren Ping , Lin Jie Hui
Published: March 2012

surface formula based on stress ratio was proposed in consideration of the effects of stress ratio on fatigue crack growth rate and the scatter of fatigue crack growth. The parameters of surface formula were estimated by using the linear principle of no-linear function. The surface formula was applied on GC4 steel to analyze statistically the effects of stress ratio on fatigue crack growth rate. The results showed that the crack growth rate will increases as the stress ratio increases in the stable stage of fatigue crack propagation for GC4 steel. The increase trend is more obvious when higher reliability is demanded.
Application of the High Strength Steel in the Automobile
Authors: Guo Rong Chun , Zhou Jin , Shi Ying
Published: March 2012

With the development of automotive industry, new high strength and high performance steel sheets are used more and more widely, which are the basis of weight reduction and safety improvement for automobiles. Taking examples of the design of car body, this paper focused on the remarkable effects of the application of AHSS in automobile lightweight, car safety and environment. It was also pointed out that the key topics will fall in the forming technique of AHSS and the applications of AHSS to new car body design to enhance automobile safety.
Analysis of Disturbance Signals in Steel Rolling Process
Authors: Yan Wei , Zhang Jie , Zhou Ying Sheng
Published: March 2012

Many control systems are subject to extraneous disturbance signals that cause the system to provide an inaccurate output. The extraneous disturbance signals in steel rolling process are analysis in this paper. If the frequency spectrums of the noise and input signals are of a different character, the output signal-noise ratio can be maximized, often by simply designing a closed-loop system transfer function that has a low-pass frequency response.
Effect of Strip Defect on Cleavage Fracture Toughness of Steel 16MnR
Authors: Liu Yan Guo , Ma Jin , Sun Xian Ming
Published: March 2012

A research on the effect of strip defect in the notched specimen of low alloy hot rolled steel 16MnR at -196°C is carried out in this paper. 4-point positive and negative bending experiments of notched specimen with different preloads are carried out to introduce strip defects of different dimensions in the front of notch. And then the residual stress and work hardening is eliminated through high temperature tempering. Bending fracture experiment is carried out at -196°C. Through microscopic observation and the measurement and analysis of mechanical parameters, it is discovered that: when the preload ratio P0/Pgy0.861, the Pf /Pgy rapidly decreases as the P0/Pgy increases. That’s because the increase of local high stress-strain region caused by the strip defect at the front notch end makes the distribution of crack-shaped nucleus active region of cleavage fracture increase, causes the cleavage initiation and leads to discrete numeric values of material notch toughness Pf and W.
Fundamental Research on Development of Micro-Actuator Driven by Liquid Crystal
Authors: Zhang Zhan Zhe , Li Gang
Published: March 2012

For the purpose of developing liquid crystalline micro-actuators, the transient behaviors of a nematic liquid crystal between two parallel plates have been computed for various parameters such as applied voltage, the gap between the plates, and the twist and tilt angles at the plates. The Leslie–Ericksen theory has been selected as a constitutive equation. As conclusion of this study, we can develop micro-actuators with arbitrary characteristics by suitably controlling the applied voltage, the size of the actuators, and the director anchoring conditions.
Influence of Fluoride Ion on the Electrochemical Properties of Al/β-PbO2 Electrode
Authors: Chen Zhen , Wu Jian , Guo Zhong Cheng , Yu Qiang
Published: March 2012

Al/α-PbO2/β-PbO2 electrodes doped with fluoride ion (NaF) were prepared by anodic co-deposition in order to investigate the influence of NaF dopants on the properties of Al/α-PbO2/β-PbO2 electrodes. In our work, we found fluoride ion will benefit for the crystallization of β-PbO2 and change the crystallite size, crystal structure, enhance the catalytic activity, and even change the mechanism of the reaction in the oxidation of the material. The presence of NaF in the β-PbO2 electrolyte could enhance the electrochemical properties of the coating and therefore make itself as a superior anode material.
On the Stability Capacity of Steel Tube Filled with Steel-Reinforced Concrete Column Subject to Axial Compression
Authors: Liu Xiao , Zhao Lei
Published: March 2012

Steel tube filled with steel-reinforced concrete (STSRC) is a new kind of heavy load column, which made by inserting steel skeletons into the steel tube, then injecting the concrete to the tube. In order to study the combined column’s stability subject to axial compression, we use energy method and numerical methods analysis derives the formula of stability coefficient in which slenderness ratio as the main parameters. Using the 1/1000 column length as the initial deflection of the STSRC columns by FORTUNE calculation program, stability coefficient is produced through comparison and analysis between calculated results from quantile regression and that from ordinary least square regression respectively. According to the computer results and energy method, the formula for calculating the axial stability bearing capacity of STSRC was established. A good agreement between the calculation results and testing results illustrates, which is feasible to using the calculating formula to calculate the bearing capacity of STSRC
Automatic Classification of Welding Flaws in Ultrasonic Testing Using the Layer Multi-Class Classifier Based on v-SVM
Authors: Chen Yuan , Ma Hong Wei
Published: March 2012

Aiming at the difficult question of qualitative analysis for welding flaws in ultrasonic testing, a novel method of flaw classification utilizing the combination of wavelet packet transform (WPT) with the layer multi-class classifier based on -SVM is presented in this paper. First, WPT is applied to extract features for ultrasonic echo-signals of welding flaws, and flaws are automatically classified by using the layer multi-class classifier based on -SVM. Then, its classification results are compared with that of several widely used multi-class SVM classification methods. To validate the method above, a series sample of butt girth welds of seamless steel tube with four types of welding flaws is made, and some experiments are performed. The results show that the proposed method is superior to other multi-class SVM classification methods in the aspects of classification accuracy, training and testing time.
Extremely High Efficiency Orange Phosphorescent Organic Light-Emitting Devices
Authors: Lv Yan Fang , Zhou Peng Chao , Lin Hong , Wang Fei Fei , Wei Na , Wei Bin
Published: March 2012

We have developed extremely high efficiency orange phosphorescent organic light-emitting diodes based on an orange phosphorescent material, employing the structure of phosphorescent dye-doped hole transporting layer to improve the power efficiency. The device shows a bright orange emission at approximately 564 nm (Commission Internationale d’Eclairage (0.49, 0.50)) and a maximum brightness of 31030 cd/m2 at a driving voltage of 7.6 V. The power efficiency of device has reached 83.56 lm/W at turn-on voltage of 2.2 V. Moreover, this power efficiency has the potential to be raised to 150 lm/W if the light outcouping can be further improved.
Influence of Alloying on the Uniformity of Strength and Structure of Gray Iron
Authors: Xiao Li Li , Ren Feng Zhang , Liu Meng Qi , Wang Yu Fei , Zhang Na Wen , Wu Rui
Published: March 2012

Two gray cast irons with equal tensile strength were prepared to investigate the influence of alloying on the machinability of gray iron. After 75SiFe modifying treatment, they were alloyed by the mixture additive containing RE, Cr, Mn, Si and Fe with a certain proportion and pure copper, respectively. The hardness, section sensitivity, structuralhomogenity and machinability were tested in this experiment. The results show that both of the gray irons have the same brinell hardness and the micro-hardness. The section sensitivity of the gray iron alloyed by the mixture additive is smaller than the gray iron alloyed by copper. The main cutting force of the cast iron alloyed by the mixture additive is lower than that of the cast iron alloyed by copper, therefore, the gray cast iron alloyed by the mixture additive has a better machinability than the cast iron alloyed by copper.
Numerical Simulation Analysis of the Cold Bending Forming Technology Based on DEFORM
Authors: Xu Xiao Bing , Luo Hong Run
Published: March 2012

In this paper, the accurate numerical simulations using the DEFORM-3D software are carried out in terms of the cold bending pipe technology. Correspondingly, the changes of state variables are gained, such as the stress, the strain, the material deformation speed, the damage severity and so on. Meanwhile, the important technical parameters concerned with the quality of pipe bending formation like the speed of the punch press, the friction coefficient and the friction types are comprehensively analyzed. Thus, it can be realized in practice to control and optimize the quality of the bent pipe production
Photoinduced Anisotropy in a New Diarylethene Bearing Five and Six-Membered Aryl
Authors: Tong Zhi Peng , Pu Shou Zhi , Cui Shi Qiang
Published: March 2012

A new symmetrical photochromic diarylethene, 1-(2-methyl-5-formyl)-2-(2- cyanophenyl) perfluorocyclopentene(1a), was synthesized, and its photochromic properties were investigated in detail. The compound exhibited good photochromism both in solution and in PMMA film with alternating irradiation by UV/VIS light, and the maxima absorption of its closed-ring isomer 1b are 544 and 549 nm, respectively. The photochromism properties of 1a diarylethene show good photochromism in hexane and in PMMA amorphous film. Steady state fluorescence studies indicated that 1a diarylethene is higher fluorescent in the open-ring isomer, but there almost no fluorescence in the closed-ring isomer in PMMA amorphous film. The diarylethene 1a has promising application for photo-switching, fluorescence-switching which can use for data storage.
Preparation and Basic Characterizations of Alginate-Chitosan Hydrogel
Authors: Xing Nan , Tian Feng , Yang Jian , Li Yu Kun
Published: March 2012

The aim of this study is to prepare and characterize an alginate-chitosan hydrogel for wound dressing application. The influence of alginate concentrations (1%, 2%, 3% and 4% (w/v)) was investigated. This polyelectrolyte hydrogel is observed to be transparent and flexible. The SEM morphological structure of hydrogel is composed of a dense outer skin layer and a porous cross-section layer. The FTIR and DSC measurements indicated the protonated amino group of chitosan has reacted with the carbonyl group of alginate. Some other properties for the wound dressing application are also reported in other paper. Taken together these results point out that alginate-chitosan polyelectrolyte hydrogel can be considered for wound dressing applications.
Research of the Morphology and Distribution of the Primary Silicon in Al-18Si Alloy under a Gradient High Magnetic Field
Authors: Jin Fang Wei , Wu Long , Ai Zi Jian , Qiu Li Mei , Ren Zhong Ming
Published: March 2012

A gradient high magnetic field effected significantly the morphology and distribution of the primary silicon grains in Al-18Si alloy. Experimental studies shew that in the gradient high magnetic field the primary silicon phase grains, which are large plate-like or five-star-like in the case of solidification without magnetic field, are accumulated on the top of the specimen and refined remarkably with the morphology of polygonal or nodular shapes when the alloy solidifies from the semisolid state. In the segregated layer of the silicon, the distribution of the silicon grains is homogeneous. The size of the primary silicon grains decreases and the grain number density rises with the increase of the magnetic strength maintaining the magnetization force unchangeable. It seems that the high magnetic field influences the diffusion of silicon. Theoretical models have been proposed to explain the refining and the distribution of the silicon grains.
Recognition of Partial Discharge Pulse Based on Short-Term Energy and DTW
Authors: La Yuan , Tian Li Bin , Ye Jia Hua , Wang Jiang Lin
Published: March 2012

In partial discharge location system of cable, both original and reflected waves have been produced by the same PD location, there is an intrinsic link between them. Through the traditional correlation analysis can’t identify partial discharge pulse effectively, can’t well reflect the association characteristics between the original and reflected waves, such as the amplitude and pulse width. For the identification process of the original wave and reflected wave, this paper proposed short-term energy and DTW method. Experimental results show that the proposed algorithm is increased the efficiency and reliability of the identification of the original and reflected waves.
Microwave-Assisted Hydrothermal Synthesis of Ag/BiVO4 Architecture with Enhanced Photocatalytic Activities
Authors: Guo Li , Wang Dan Jun , Fu Feng , Qiang Xiao Dan , Yang Yuan
Published: March 2012

BiVO4 microcrystals were prepared via a microwave-assisted hydrothermal process. Ag loaded BiVO4 photocatalyst was prepared by a photoreduction process. XRD, UV-Vis-DRS and FE-SEM techniques were employed to investigate its’ phase composition, absorption property and morphology. The photocatalytic activity of the as-prepared samples was evaluated by the degradation ratio of Rhodamine B. The result indicated that the as-synthesized BiVO4 are spherical microcrystals built up by square nanoplates. After Ag nanoparticles deposite, the photocatalytic activity of BiVO4 was greatly enhanced. Furthermore, the photoctalytic activity enhancement mechanism was also discussed.
Research on the Method of Measurement of Nonlinear Refractive Index of Optical Materials by Interference of Capillary
Authors: Qi Sheng Wen , Liu An Ping , Lu Hong Guang
Published: March 2012

With the intensity distribution of interference fringes formed by a capillary filled with transparency liquid, the variations in refractive index (RI) of nonlinear optical materials, corresponding to change of the intensity at the centre of fringes for a period, are deduced. Using this conclusion, we measure variations in RI of water solution of methyl orange (MO) excited by laser at 441.6nm. As an experimental result, the change of RI is 0.00216 and the corresponding effective index of refraction is -1.65×10-10 m2W-1. So, it can be used to measure nonlinear optical materials as a novel and simple method.
Kinematic Performance Analysis of the Double Wishbone Independent Front Suspension
Authors: Jin Jia Qi , Li Jiao Jiao
Published: March 2012

The vector method is applied to study the kinematic performance of the double wishbone independent front suspension.The model of the right front suspension is established in this paper, on this basis, the local motion reference frames of the upper and lower arms are established by using the coordinate transformation method. Therefore, the space relations between of the arms can be transformed into the plane motion of their respectively local reference frame by this method. Furthermore, the variable law of the wheel alignment parameters with the swing angle φ of the lower arm, is obtained through establishing the constrain equations of the key points.