bluuebunny/crossref_metadata_2025 huggingface dataset:
Applications of Extended Kalman Filter for Position Sensorless Control of Permanent Magnet Linear Synchronous Motor
Authors: Yang Wei Min , Pan Li Jiao , Zheng Peng Fei , He Yong Qiang
Published: October 2013

Control system with position sensor is susceptible to the severe environment such as high temperature, humidity and vibration, which reduce the stability of control system. Position sensorless control of permanent magnet linear synchronous motor need not position sensor so that it can use in abominable environment. According to three phases voltage and two phases current measured from motor, the position and speed of motors mover can be estimated directly based on extended Kalman filter algorithm which is a kind of recursive algorithm. So position sensorless close loop control of PMLSM can be realized.
On Fuzzy Sliding Control for a Robot Manipulator
Authors: Tang Pu Hua , Lei Yu Yong
Published: October 2013

A fuzzy sliding control for the motion of the robot manipulator is proposed. The quasi-sliding mode control (QSMC) was added to the fuzzy control. Therefore the system inputs and fuzzy rules can be reduced in fuzzy sliding control. Then the system will be a Single Input Single Output (SISO) system and it has only five fuzzy rules. This makes design process much more simple. The simulation results show that by employing proposed controller to the position control of a three-axis robot manipulator, the overshoot was drastically reduced. Also fast rising time and a small extent of steady-state error can be obtained.
Self-Repairing Control System for a Hybrid Underwater Vehicle
Authors: Wang Biao , Wu Chao , Ge Tong
Published: October 2013

A novel remotely operated underwater vehicle-a hybrid remotely operated underwater vehicle (HROV) capable of working to the full ocean depth has been developed. The battery powered vehicle operates in two modes. For broad-area survey, the vehicle can operate as an autonomous underwater vehicle (AUV) capable of mapping the sea floor with sonars and cameras. For close up imaging and sampling, the vehicle can operate as a remotely operated underwater vehicle (ROV) employing a optic fiber tether for real-time telemetry of data and video to its operators on a surface ship. In order for the vehicle to achieve a certain survivability and reliability level, a self-repairing control system (SRCS) has been designed. This paper presents the two basic technologies in SRCS: fault diagnosis and isolation (FDI) and reconfigurable control. For FDI, a model-based hierarchical fault diagnosis system is designed for the HROV. Then, control strategies which reconfigure the control system at intervals according to information from the FDI system are presented. Combining the two technologies, we obtained the fundamental frame of SRCS for the HROV.
Periodic and Chaotic Dynamic Responses of Face Gear Transmission System
Authors: Hu Ze Hua , Tang Jin Yuan , Chen Si Yu
Published: October 2013

The periodic and chaotic dynamic responses of face gear transmission system considering time-varying mesh stiffness and backlash nonlinearity are studied. Firstly, a nonlinear time-varying dynamic model of face gear pair is developed and the motion equations are presented, the real accurate mesh stiffness is obtained by applying Finite element approach. Then, the dynamic equations are solved using Runge-Kutta numerical integral method and bifurcation diagrams are presented and analyzed. The stability properties of steady state responses are illustrated with Floquet multipliers and Lyapunov exponents. The results show that a process of periodic-chaotic-periodic motion exists with the dimensionless pinion rotational frequency as control parameters. The analysis can be a reference to avoid the chaotic motion and unstable periodic motion through choosing suitable rotational frequency.
Crystallization Regimes and Spherulitic Morphology of Poly(trimethylene terephthalate/isophthalate) Random Copolyesters
Authors: Tung Chia Hsin , Shyr Tien Wei
Published: October 2013

The crystallization regimes and spherulitic morphology of poly (trimethylene terephthalate/isophthalate) (TI) random copolyesters were studied in this work. A hot stage polarizing microscope was used to observe morphology and measure growth rate of the spherulite of TI copolyesters. Lauritzen-Hoffman secondary nucleation theory was applied to investigate crystallization kinetics and regimes of TI copolyesters. Results show that the spherulitic growth rate decreased with an increase in isophthalic acid content of the copolyesters. The analysis of Lauritzen-Hoffman secondary nucleation theory shows that regime I, II, and III were observed in TI11 and TI21. Regime III was observed in TI29. The spherulitic morphology of TI11, TI21, and TI29 changed from elliptical-shaped spherulite to irregular spherulite and then to normal spherulite at the regime transitions.
The Mechanical Performance Evaluation of a Mechanism with Curved Edge Driving Component
Authors: Liu Xin Qin
Published: October 2013

Mechanicalmethods were employed to study the motion and force transmission performance ofa kind of connecting rod slider mechanism with a curved edge driving component.The deduction methods and the computation formulae of the slider displacement,velocity, acceleration and the executive force gain coefficient were given.Considering two cases of the driving components with straight line edge andexponential function edge, the numerical examples was computed respectively,the results show that the former one is suitable for the force transmission andcan be used in the grip design and the other one is suitable for the motiontransmission which can be used in the fast moving mechanism
Dynamic Performance Analysis and Simulation of Hybrid-Driven Seven-Bar Mechanical Press with Double Cranks
Authors: Dang Xiao Zheng , Zhou Liang Sheng , Liang Dong
Published: October 2013

Planar multi-bar mechanisms are widely used in the machinery industry. In this article, the hybrid mechanical press, a typical planar seven-bar mechanism is investigated. The dynamics mathematical model is established based on the simultaneous constraint method. On the basis of it, a relevant simulation is carried out by virtue of MATLAB. Thus, the dynamic response law and stress state for the key part (ram) of the mechanism are yielded. The simulation results show that this method is much more effective and efficient and provides a theoretical foundation and a better analytical approach of simulation for design and analysis of complex hybrid-driven mechanical equipment in the future.
Double Laplace Transform Computing Dynamic Response of the Large Thickness to Span Ratio Beam
Authors: Zhang Wei
Published: October 2013

In this paper, use double Laplace transform, in the image space deep beam deflection and corner of analytic is obtained,Then use the numerical inversion of Laplace transform ,time domain dynamic response curve is calculated. Also apply to the combined effects of sandwich beam bending and torsion beam dynamic response calculation.
Computation of Dynamic Stress Intensity Factor by Direct Integral Boundary Element Method
Authors: Zhang Wei
Published: October 2013

A linear temporal value of the displacement and stress on the boundary over a time interval is adopted, and the boundary integral equation calculating dynamic SIF (Stress intensity factor) in time domain is set up by the travelling characters of elastic wave and the dynamic extention of Betti’s reciprocal theorem. The dynamic SIF of the cracked finite plate is calculated. The comparison shows that the computational results agree favourably with other published results .
Analysis and Simulation on Vehicle Rollover Dynamic Driving on Curving Path
Authors: Bao Wei Ning
Published: October 2013

When vehicle driving on turning, its easy to rollover because of high speed and large steering angle. Aim at Sports Utility Vehicle, a rollover dynamic model of three degree of freedom is established and used to simulation test of typical cornering. The relation of steering wheel, steering wheel rotation speed and suspension stiffness to vehicle rollover characteristics was analyzed by Fishhook simulation test. Then, the sensitivity analysis was carried out to confirm the biggest factor influencde vehicle rollover.
Mechanical Analysis on the Scour of Submarine Pipeline
Authors: Han Yan
Published: October 2013

The reason about the scour of the submarine pipeline is researched in this paper. Through the mechanical analysis about the sand grain in the downstream of the pipe, the critical condition about of scour start is derived. The balance condition about the scour is studied. Through the mechanical analysis about the sand grain in the scour hole, the maximal scour hole depth is got.
The Pressure Performance of a Slide-Style Multianvil Large Volume Press
Authors: Lv Shi Jie , Cui Hong Ling , Du Kai
Published: October 2013

A slide-style 6-8 multianvil high pressure apparatus which has a better synchronicity and smaller step difference uncertainty has been developed in recent years. The second-stage pressure-generating system was established successfully. The cell pressures for 18/8, 14/8, 12/6, 10/4, 8/3 assemblies have been calibrated by using fixed point method at room temperature. The 8/3 assembly has an excellent pressure efficiency and could be obtained 22.5GPa with only 250 ton loading force. The size of gaskets and performance of transmitting medium have a great influence on cell pressure. Semi-sintered MgO (porosity 40%) medium is more excellent than pyrophyllite in performance of transmitting pressure.
Aircraft Navigation Model Based on Genetic Algorithms
Authors: Yang Qi Wei , Jin Bo , Huang Jing Xiong
Published: October 2013

Integrating spectrum and navigation technology is an impotant research field. Using air-ground position model for earth observation is a hot topic in the field of photogrammetry and remote-sensing. When in the absence of ground control points or only a small amount of ground control points, through the acquisition and display of images, data processing and analysis of a series of process, accurate navigation information for aircraft can be provided. In this paper a new method of multispectral navigationOtsu method is presented. Begin with the images of spectral features, the paper explored the method of the multispectral image navigation,using genetic algorithms and realized the spectrum of aircraft navigation.
3D CAD Model Retrieval Algorithm Based on Accessibility Cone Distributions
Authors: Qiang Wei
Published: October 2013

To reuse 3D CAD models more efficiently, a new 3D CAD model retrieval algorithm based on accessibility cone distributions is proposed. Firstly, a sufficiently large number of random sample points on surface of 3D CAD model are taken and the normal direction of each sample point is recorded. Then, the accessibility cone of the given sampled point is computed. Secondly, a planar grid is constructed to express the accessibility cone distribution by obtaining a statistic data of the sampled points. Lastly, the L1 distance metric method is taken to compute the similarity between the two accessibility cone matrices, which can give the similarity coefficient for two compared 3D CAD models. Experiments results show that the algorithm can effectively support 3D CAD model retrieval, and the efficiency meets the requirement of engineering application.
An Engineering Drawing Retrieval Method Based on Spherical Harmonics
Authors: Wei Zhen Da
Published: October 2013

In this paper, an engineering drawing retrieval method based on spherical harmonics is proposed. Firstly, the sample points are uniformly generated by computing the interaction points between the rays and the engineering drawing. Secondly, the sampled points are transformed from the 2D space into the 3D space to get the spherical harmonics shape descriptors. Finally, the Euclidean distance is adopted to compute the distance between the two feature vectors, which can give the similarity coefficient for two compared engineering drawings. Experimental results show that the proposed method is good at retrieving engineering drawings and the retrieval performance can meet the requirement of the practical retrieval.
Numerical Analysis on Mechanical Property of Bolted Joint
Authors: Yang Lihua , Li Zhi , Yu Lie
Published: October 2013

The bolted joint is the important fastening parts of structures. Its fatigue and self-loosing will affect the safety of the system. In this paper, the finite element contact models are built to analyze the mechanical property of bolted joint numerically. The stress, strain and clamping force when the bolted joint is subjected to preload, axial force and transverse load are investigated. The results show that the bolt is the most dangerous part of bolt-nut connected member. The clamping force of bolted joint will gradually lose with the increasing loading cycles of cyclic transverse load which generally explains the stress loosing rule of bolted joint.
Analysis of Stinky Components in Natural Rubber Latex
Authors: Liu Hong Chao , Wei Fei Yun , Wang Qi Fang , Zeng Zong Qiang , Yu He Ping
Published: October 2013

The reason for the natural rubber latex giving out stink during long-term storage or transportation was studied. The stinky component in the latex detected by gas chromatography-mass spectrometry was phenol, the generated content of which increases as the storage temperature rising. It is most possible that the phenol was generated from the decomposition of the inwall coating of iron bucket which loading the natural rubber latex in the strong alkaline during the long-term and high-temperature storage.
Static and Dynamic Characteristic Analysis for the HSR Series Linear Motion Guide
Authors: Zhang Yao Man , Gu Ren Jun , Yang Guang Xiao
Published: October 2013

The dynamic characteristic of junction surface is an important part of the dynamic characteristics of NC machine tools, and it is sometimes the weakest link of the machine tool's dynamic characteristics. The precision of the finite element calculation of the machine tool's dynamic characteristics shall be affected by the junction surface parameters directly. Linear Motion guide is one of the most widely used components of the NC machine tool, and its characteristic is one of the most important components of the performances of the NC machine tool. The HSR series of linear motion guides are taken as the object of the paper, and its static and dynamic characteristics are studied. And the parameters of static and dynamic characteristics of HSR, such as static stiffness, natural frequency and modal shape are obtained. The accuracy of the finite element analysis mode is verified, which establishes the foundation for the dynamics analysis of machine tool.
Dynamic Characteristics Research of Boring-Milling Ram Based on ANSYS
Authors: Deng Luo Hong , Chen Zai Liang , Zhou Zhen Dong
Published: October 2013

This paper carried out the modal analysis for ram based on ANSYS, and calculated the first six natural frequencies and vibration modes and finally verified that the dynamic incentive caused by the spindle rotation on the ram does not produce resonance phenomenon generally. By adding harmonic load, made the harmonic response analysis based on the modal analysis, calculated displacement and stress responses of the system under the action of the exciting force and obtained the dynamics and the frequency response curve, that is, amplitude-frequency curve which verified the ram can withstand various sine loads of different frequency. The dynamic characteristics were studied and the dynamic parameters were obtained after the studies above, which provide important foundation for the design and improvement of the machine ram structure.
Hydrodynamic Analysis of Submarine of the Wave Glider
Authors: Jia Li Juan , Zhang Xuan Ming , Qi Zhan Feng , Qin Yu Feng , Sun Xiu Jun
Published: October 2013

Wave glider harvests the abundant ocean wave energy for long term ocean cruising due to its particular two-part architecture. Its submerged part named glider converts vertical fluctuation of waves to horizontally forward propulsion. Because of the uncertainty of the ocean condition and irregularity of its wave motion, the design parameters of the submerged glider vary in a confined range in the state of art design models. In order to indicate the hydrodynamic characteristics and summarize the dynamic law of the submerged glider with different design parameters, this paper concentrates on three critical design details: profile of the wings, interval space of the arrayed multiple flapping wings and maximum rotating angle of wings, and performs the corresponding CFD analysis. Finally, we conclude that the lift curve of NACA0006 and plate profile is almost the same with small waves at sea, but NACA0006 profile can generate much larger forward lift than the plate profile with seawater velocity up to 0.5m/s; Decreasing space of intermittent causes more obvious decrement of forward lift while space of intermittent overpasses the inflection point at 20cm; With the decrement of the maximum rotating angle, the forward lift occurs to take a sharp decline if the angle strides the inflection point.
Microwave-Assisted Preparation of PS Phase Change Microcapsules
Authors: Wang Gu Xia , Guo Sheng Wei , Xu Wei Bing
Published: October 2013

Polymer phase change microcapsules were prepared through microwave-assisted emulsion polymerization, with the core of hexadecane, the shell of styrene, the emulsifier of sodium dodecyl sulfate, the initiator of potassium persulfate. A few of key factors which can influence the thermal performance and the encapsulation, such as emulsifiers, initiators, temperature and reaction time were investigated. FTIR and DSC were employed to characterize the structure, the phase transition temperature and latent heat.
Analysis on Static Character of Piezoelectric Tubular Composite Actuator
Authors: Ma Yu Ting , Wang Ce , Zhong Jin Feng , Wu Yun Liang
Published: October 2013

The static character of piezoelectric composite actuator with four tubes is studied. Taking into account the non-uniform electric field distribution in piezoelectric tube, the bending deflection, axial strain, output axial force and bending moment are discussed. The results calculated by proposed method are compared to that calculated by traditional thin wall theory and the proposed method is more accurate and reasonable. A prototype actuator was fabricated and tested to validate the theory results. The theoretic result and tested results agree well with each other. This research provides theoretical guidance and basis for the design of piezoelectric tubular composites actuators.
Simulation on Stress Relaxation of DD3 Nickel-Based Single Crystal Superalloy Based on Micro-Cell Model
Authors: Ding Zhi Ping , Zeng Jun , Bai Xiao Peng , Fang Jian Hui
Published: October 2013

Tension-torsion experiments at 680°C and 850°C on thin-wall tube specimens of DD3 nickel-based single crystal superalloys were successfully completed. It shows that specimens have stress relaxation obviously and inelastic deformation accumulation phenomenon with different crystal orientation under asymmetric cyclic loadings. Based on the microstructure characteristics of nickel-based single crystal superalloys, a two-phase multi-cell microscopic mechanical model was established by finite element method to simulate the test with displacement. Numerical simulation studies showed that the matrix phase appeared plastic deformation accumulation at first and resulted in low cycle fatigue damage, but stress distortion occurred on the boundary with a single cell model under tension-torsion displacement loading, which is not consistent with experimental results. While using multi-cell model can avoid this phenomenon, it could be better to simulate stress relaxation behavior under asymmetric cyclic loading at elevated temperature and to study on stress weaken damage for single crystal superalloys.
How to Increase the Accuracy of Analysis and Reduce the Computational Time in ANSYS in the Case of Deformation Study of Orthopedic Bone Plates
Authors: Malekani Javad , Yarlagadda Prasad K.D.V. , Schmutz Beat , Gu Yuan Tong , Schuetz Michael
Published: October 2013

Currently, finite element analyses are usually done by means of commercial software tools. Accuracy of analysis and computational time are two important factors in efficiency of these tools. This paper studies the effective parameters in computational time and accuracy of finite element analyses performed by ANSYS and provides the guidelines for the users of this software whenever they us this software for study on deformation of orthopedic bone plates or study on similar cases. It is not a fundamental scientific study and only shares the findings of the authors about structural analysis by means of ANSYS workbench. It gives an idea to the readers about improving the performance of the software and avoiding the traps. The solutions provided in this paper are not the only possible solutions of the problems and in similar cases there are other solutions which are not given in this paper. The parameters of solution method, material model, geometric model, mesh configuration, number of the analysis steps, program controlled parameters and computer settings are discussed through thoroughly in this paper.
Shape Recovery Characteristics of Shape Memory Polymers Subjected to Bending
Authors: Zhou Tao , Tan Hui Feng , Liu Yu Yan
Published: October 2013

Shape recovery is a critical characterization of the Shape Memory Polymers (SMP); so far, there has not been a set of uniform specifications, however, on the deformation recovery characterization of SMP, more exactly, on the shape recovery ratio measurement. A simple and effective experimental method is designed to obtain the shape recovery ratio of SMP; and a series of experiments are carried out to measure the shape recovery ratio of a thermoset shape-memory epoxy resin within the finite bending deformation at various test temperatures. And the results show that the shape recovery ratio and rate of the thin sample are larger than that of the thick one; the deformation curvature has little effect on the shape recovery ratio with the test temperatures over, or below, the glass-transition temperature,Tg, but has significant effect nearTg. The conclusions provide an important basis for the structural design of SMP.
Manufacture of Nb3Al Short Wires by RHQT Method Using a Newly Designed Apparatus
Authors: Chen Chuan , Bai Zhi Ming , Zhang Ping Xiang
Published: October 2013

A new apparatus is designed and fabricated for rapid heating and quenching (RHQ) process of Nb/Al precursor short wires. As the primary step, Nb/Al precursor with large Nb/Al filaments is manufactured through rod-in-tube (RIT) method to study the RHQ parameters. This apparatus could heat Nb/Al precursor short wire up to about 2000 °C in 10 ms-100 ms and then quench the wire into molten gallium. Results of line scan from SEM-EDS show that Nb3Al is formed in short wires. Tests show that the zero-resistance temperature of Nb3Al short wire is about 17.7 K, which also indicates that stoichiometric Nb3Al is formed. However, the critical current (IC) is only 1.8 A at 10.2 K. The low ICcan be explained by the low volume ratio of superconducting Nb3Al and lots of voids along the wire. Further optimization and improvements will be performed.
A Protection Scheme for Standard Equipment to Avoid Harmful Random Large Current
Authors: Qi Shu Zhe , Han Wei , Zhou Song Bin , Li Chang , Huang Ke Jia
Published: October 2013

In the process of detecting and calibrating for power equipments, it appears a phenomenon that standard equipment is damaged by harmful random large current from tested equipment. This danger signal mainly occurs in the transient state of tested equipment, i.e., in a short time after starting to output new set current. This paper proposes a method for protecting standard equipment to eliminate damage caused by random large current. Its content mainly describes one of the key parts of this scheme including accurately sampling and transient signal removing intelligently in details. Design the related current sampling circuit, test results show that the resolution of circuit can reach to 10mA, which satisfies the work well.
An Integrated Approach to Index Weight Based on Improved D-S Evidence Theory and Application of the Product Solution Evaluation
Authors: Hua Er Tian , Han Wei , Chen Da Qiang , Zhang Jian
Published: October 2013

To overcome the defect of the traditional method to determine attribute weight in the multiple attribute decision making problems, this paper proposed a kind of data fusion method based on The D-S Evidence Theory improved by The Grey Correlation Analysis. The method, firstly, calculated the basic probability assignment functions discount factor based on The Grey Correlation Analysis, then let the subjective weight and objective weight together based on D-S combination rules in order to avoid the deficiency of the single weighting method. Using the fusion of evaluation indexs subjective and objective weight of mobile phone product solution as an example, the results show that the proposed method is effective.
Analysis on Apparel Marker Making's Technical Requirements and its Influencing Factors
Authors: Huang Can Yi
Published: October 2013

Apparel marker making is also called apparel plates setting; it refers to the process of products marker making diagram design. The implement of marker making has to satisfy the design effect, production and other requirements; it also can be explained by putting various specifications of all garment plates for scientific arrangement within designated fabric width, then determining the materials quota by the smallest area or the shortest length. The purpose of marker making is making fabric utilization up to the highest rate, at the same time reducing the production cost and providing a feasible basis to fabric spreading, cutting and other processes.
Design of Holes Distance Adjustable Device of Duckbill Seeder
Authors: Lü Xiao Rong , Lü Xiao Lian , Zhang Li Hua
Published: October 2013

At present the duckbill seeder has small use range, the low frequency of use, hard to adjust the holes distance problem, design the hole distance adjustable mechanism for continuously adjustable planting distance of duckbilled seeder . The mechanism realizes seeder certain range continuous adjustable distance, to achieve the aim of a machine used several purposes, expand the scope of use, improve the frequency of use. By the virtual prototyping technology, completed the design of the overall structure of the holes distance adjustable device.
Analogical Transfer: A Practical Approach to Innovative Product Design
Authors: Zhang Jing
Published: October 2013

For the purpose of presenting a practical approach that is contributed to breakthrough product design, we investigated certain firms and their novel products. The findings reveal that cross-industry knowledge acquisition has played an essential role in providing innovative design solutions, and the connotation of this phenomenon is the application of analogical transfer. Based on the cognitive psychology theories, we further discussed the procedures for an analogy-based design, which includes goal-setting, representation, retrieval and mapping. Finally, a systematic design method is proposed.
Design and Application of Online Calibration System for Automatic Verification Pipeline of Electric Energy Data Acquisition Terminal
Authors: Dong Li Jun
Published: October 2013

In order to improve the detection ability of acquisition terminal, the design scheme of automatic verification pipeline for electric energy data acquisition terminal was proposed. It designed the verification units of automatic verification pipeline and developed the calibration system for dielectric strength test unit, function and error test unit. The testing software to issue test report was developed. The analysis model for calibration data was set up. The process of uncertainty in measurement for auto-measuring result based on GUM algorithm was specified. The results show that the power parameter of automatic verification pipeline can be accurately checked by the calibration system, and consistency of multi-leaving can be ensured. The calibration system is suitable to evaluate the reliability and veracity for the set of automatic verification pipeline. So it provides technical support for speeding up the construction of the electric energy data acquisition system and strong smart grid.
Study on Natural Rubber Quality of Micro-Cut Tapping with Gas-Stimulation
Authors: Wang Kai Dian , Huang Mao Fang , Yang Chun Liang , Zeng Zong Qiang , Liang Zhi Xiong , Xiao Xian Zhou
Published: October 2013

The natural rubber samples produced by conventional tapping methods were used as a control, then analyzed the dry rubber property of natural rubber, the dynamic property and Physical & mechanical property of vulcanized rubber using Rubber processing analyzer and Thermogravimetric Analyze the difference between the properties of dry rubber and vulcanized rubber produced by Micro-cut Tapping with Gas-stimulation. The results indicated that the tensile strength, tear strength elastic modulus of dry rubber that produced by Micro-cut Tapping with Gas-stimulation are respectively 20%, 7% lower than the control. The protein content of dry rubber materials produced by Micro-cut Tapping with Gas-stimulation is 16.7% higher than control group.
The Simulation and Optimization of Chain Tool Magazine Automatic Tool Change Process
Authors: Yan Yi Long , Yin Yan Chao , Xiong Zhuang , Wu Lei
Published: October 2013

In order to ensure processing quality and validate the accurary of macro program. VERICUT software was often used to achieve five-axis gantry milling machine automatic tool changer (ATC) of the whole process simulation.The results show that the validity of macro program is verified by NC simulation and the efficiency of NC simulation is improved. It provides a guide for the modeling and simulation of multi-axis CNC machine tools.
Information Fusion of Multi-Source Isomerous NC Machining in Networked Manufacturing
Authors: Liu Pei Yue , Wang Jun Fen , Zhang Ya Han
Published: October 2013

Aiming at the question that processing information can not be extracted effectively because of heterogeneity of NC machine tools and information extracting method is not widely used. A multi-source isomerous NC machining process tracking and fusion method based on information fusion is proposed. This method can determine the current process state of NC machine to realize effective tracking of processing.
OD-Characterization of Symmetric Group S57
Authors: Yang Mei
Published: October 2013

In this paper, we show that the symmetric group can be characterized by its order and degree pattern. In fact, we get the following theorem: Let G be a finite group such that and . Then G is isomorphisic to one of the almost simple groups: and . Particularly, is 3-fold OD-characterizable.
Research on Insulator Detection by Nuclear Magnetic Resonance
Authors: Zhang Lai Fu , Li Xiao Nan , Liu Guo Qiang
Published: October 2013

Long-term used insulator for power transmission may suffer heavy aging problems for outdoor environment, such as rain corrosion. For Si-Rubber material, the chemical attributes under bad dielectric condition are good indicators for on-line equipment safety alert. In this work, both principle and experiment research were undertaken for the T2 measurements by NMR method. The problems of un-quantitative for other convenient methods had been solved. Most importantly, the chemical reasons for insulator aging has been analyzed for the first time. The results show that the relaxation time would decrease sensitively as the aging increases. In future NMR data scaling will be accomplished by virtue of DC impedance measurements.
Boost Keywords Conversion of Search Engine
Authors: Xu Yan Yan , Zou Pin Jia , Fang Zheng
Published: October 2013

more and more people are used to purchase online. And companies also want to pay for the keyword on big search engine, such as Baidu, Google. So the strength of the competition plays a significant role in the efficiency of an online advertising campaign. Models for keyword auctions usually assume that, the value of a click is fixed and independent of the other sponsored ads in the auctions result, for the advertiser. In china, the big Online shopping mallTmall. Consumers can search products and service through Tmall Search Engine, a search engine allows consumers search in the Tmall. And we employ a zero-inflated Poisson regression to model the conversion of keywords.
A Comparison of Approaches to Opinion Mining
Authors: Wang Ge , He Cheng Wan
Published: October 2013

Opinion mining aims at extracting information which is from Internet or documents and useful for human beings. We analyze five opinion mining methods and compare these methods from the aspects of mining granularity, automation, input, defect, the scope of application. Finally, we point out our future work.
Design on Virtual Machine Frame of Cloud Computing Platform
Authors: Wu Jing , Zhao Feng Zhi , Dong Yu Dan
Published: October 2013

In the framework of the virtual machine can be well applied to cloud computing platforms such as multi-level security environment for guest virtual machines and communication between the fine-grained access control to prevent malicious software attacks and the spread between the guest virtual machine. This paper presents a set of virtual machines framework for assurance in the cloud computing software services in the guest virtual machines user-level application security.
The Research of Group Hierarchy Access Control in E-Government System
Authors: Qin Sheng Jun , Li Ken E
Published: October 2013

In order to meet the requirements of E-Government System with complex user relationships and diversified business process , this paper proposed an advanced RBAC model named Group Hierarchy Role-Based Access Control (GH-RBAC). In this model, tradition user role assignment have been reformed to multilayer user group role group assignment which improve the scalability and adaptability of access control. Finally, we design and implement the extend model which emphasis the way to carry out access control module with the low coupling.
Research on Standard Domain and Non Standard Domain Based on SIP Protocol
Authors: Zhu Lian Peng , Jiang Shu Ming , Zhu Ying Xia , Zhang Jiang Zhou , He Wei
Published: October 2013

SIP protocol is a for the establishment, change and terminate multimedia session control protocol of application layer, based on the analysis of SIP protocol stack, in view of the non SIP video communication field has designed a communication strategy, achieved with the standard SIP domain as well as the standard SIP device and the existing non SIP domain communication, makes SIP protocol is compatible with existing video scheduling system, enhances the use range, avoid re design of non SIP domain, and the validation and application in the bus company project.
Studying on the Industrial Competitiveness of Internet of Things in China's Provinces Based on Principal Component Analysis
Authors: Li Jia Jun , Zhang Ying , Ma Nan
Published: October 2013

According to the present situation of the industrial resources of Internet of Things (IOT) are distributed in unbalance in different provinces, in this paper, using principal component analysis, it has ranked the competency of the industrial development of Internet of Things in 31 provinces; On the basis of the result, analyzing the top five provinces, the factors that restrict the industrial development of Internet of Things, we find the competitive advantage of the Internet of Things industry is concentrated in key points, which include the number of developing projects in new products high technology and the number of regional patent authorizations, providing the basis for the Internet of Things industry to develop system layout and competitive strategy.
Design and Analysis of Optimization Algorithm for a Class of Uncertain Linear System
Authors: Liu Hong
Published: October 2013

An optimization algorithm method design and analysis is presented for class of linear uncertain systems. Firstly, it is shown that disturbances of linear uncertain systems are divided two parts by the projection matrix, one is matched and the other is unmatched part. Then the controller based on integral sliding mode and optimization performance index is constructed to ensure the robustness of the linear uncertain systems. Additionally, we give an optimization performance guaranteeing the stability of proposed procedure by using the Lyapunov theory. Simulations show the effectiveness of the method proposed that a linear system is best controlled by a linear controller.
Virtual Campus Roaming System Optimization Algorithms Based on Virtual Reality
Authors: Wei Yu Qing , Xiao Juan , Hao Dong Qing
Published: October 2013

Virtual Reality combines multiple computer technology and information technology branch, to create a simulation of the real space provided strong support for an image of human-computer interaction techniques. VR calculated by computer simulation of various lights, sound and sensor devices allow users to feel immersive, real-time perception and conduct a natural interaction. This thesis is mainly based on virtual reality technology Virtual Campus Roaming System optimization algorithm for practical engineering application of virtual reality technology to provide a basis.
Reliability Modeling and Availability Simulating Based on GSPN Considering Hardware, Software and Human Factors
Authors: Xu Yong Cheng , Dong Bin , Li Yue , Shen Guo Ji , Luo Ming Lei
Published: October 2013

Aiming at the functional and structural characteristics of helicopter power transmission systems, this paper researches on the dynamic reliability modeling and simulating methods of complex mechanical systems. The hardware reliability, the human reliability and the software reliability related to helicopter power transmission systems are analyzed in this paper from the view point of systems engineering; the General Stochastic Petri Nets (GSPN) reliability models are established and the availability is simulated. According to the logistic connection among the attributions of the systems availability, two conceptions are presented: degree of facilitation and a new availability calculation model. Results show that the calculational value is very close to the simulating value. The new model based on facilitation is proved to be correct. The paper contributes to provide an effective reliability analyzing method and theoretical basis for complex mechanical system.
Study on Manufacturing Enterprises Distribution Center Location
Authors: Ji Shou Wen , Huang Ting Ting , Zhang Yun Feng
Published: October 2013

The problem of one-level distribution centers is researched in this paper. It is a customer-oriented problem. This paper is from the perspective of manufacturing enterprises. The assumed conditions about location are put forward. The costs associated with distribution center location are analyzed. Distribution center location model is built by 0-1 mixed integer programming. And the software LINGO is used to solve the model. Distribution center location algorithm is verified by an example in the paper. The example explains that combining 0-1 mixed integer programming with LINGO is simple and effective to distribution center location.
Study on Cross-Border Network Purchasing through Agents Risk Evaluation Index System
Authors: Chen Jia Juan , Wu Ya Shuang
Published: October 2013

The related issues are constantly emerging as the cross-border network purchasing through agents develops rapidly. The paper analyzes the risk on cross-border network purchasing through agents. The Delphi method is used to establish the risk evaluation index for domestic buyers, online purchasing agent platform and customs supervision department in order to provide a scientific and reasonable evaluaiton index system.
Damping Properties of Novel Organic Hybrids of Textile Reclaimed Rubber and Hindered Phenol
Authors: Zhou Xiao Ou , Jiang Sheng , Yan Xiong , Liu Xue Ting , Li Li
Published: October 2013

A series of thin, low-cost and environment-friendly organic hybrid composites consisting of reclaimed rubber (R-Rubber) which is a waste product of roller processing of textile mill filled with organic hindered phenol compound 2, 2-methylenebis (6-tert-butyl-4-methyl-phenol) (AO2246) were fabricated. In this study the damping property of the R-Rubber composites were tested in the dynamic mechanical analysis (DMA). The study concluded that R-Rubber/AO2246 composites exhibited an exceptional damping performance with a broad temperature range. Meanwhile, by addition of AO2246, the tan δ peak maximum (tan δmax) of R-Rubber/AO2246 composite was remarkably increased up to 1.5. Furthermore, with increasing the AO2246 content, storage modulus (E') and loss modulus (E") increases up to R-Rubber/AO2246 (100/80) and then becomes smaller. There is critical value on E and E" increasing which is caused by the excessive crystallization. The Interaction of AO2246 crystallizing, hybridized state and Molecular hydrogen bond led not only to control Tan δmaxof R-Rubber, but also to regulate glass transition temperature and improve the storage modulus, which make R-Rubber have potential applications in fields of engineering.
Efficiency and Economy Research of a Tunnel Kiln's Flue Gas Heat Exchanger
Authors: Li Jie , Zhu Yong Hong , Jian Sun
Published: October 2013

In order to obtain efficiency and economy of a ceramic tunnel kiln’s flue gas heat exchanger, firstly, the exchanger’s sizes and thermal parameters on operative conditions were measured. Secondly, flow field and temperature field in the operative exchanger were numerically simulated by using FLUENT, a computational fluid dynamics soft ware. Finally, on base of the simulation, the exchanger’s efficiency and economy were calculated. The calculation results are listed as the following: (1) Energy savings in per unit time for utilizing the heat exchanger to recycle and reuse the flue gas’s waste heat is 112.2kW. (2) Efficiency of the heat exchanger equals 77%.
Identification of Water Traffic Black Spot
Authors: Chen Hou Zhong , Du Shan Shan
Published: October 2013

Through defining Water Traffic Black Spot and analyzing the advantages and disadvantages of identification methods of Road Traffic Black Spot, then choosing Quality Control Method to recognize water area of intensive traffic accidents and applying integrated influential intensity of accident rate based on Systematical Clustering Algorithm into defining the boundary of the area, an effective evaluation method of black spot identification is established, which lays a foundation for the subsequent evaluation work.
The Property of Waterborne UV-Curable Polyurethane Based on Alkali Lignin of Wheat Straw
Authors: Chao Ji Lei , Chu Fu Qiang , Xu Chang Li , Wang Hui , Liu Yu Xin
Published: October 2013

To improve the added value of lignin, the modified alkali lignin of wheat straw was used to prepare waterborne UV-curable polyurethane. The purpose of this paper is to discuss the properties of the cured films made from the above lignin-based polyurethane. The mechanical and optical properties of the cured films were investigated. Results showed that the tensile storage modulus, tensile loss modulus, and tensile loss factor of the cured film were influenced by the addition of the lignin, which indicated that proper dosage of the lignin could change the micro-phase separation structure and improve the mechanical properties of the product. The addition of the lignin also influenced the gloss and light transmittance of the cured film. On the whole, the lignin-based polyurethane exhibits good mechanical and optical performance if proper proportion of the lignin was added to the product. The study was beneficial for utilizing the lignin in high value products.
The Managerial Strategies of Logistics Based on Three-Tier Control Mechanism
Authors: Xiong Man Chen
Published: October 2013

Ours is an epoch when stratagem will win. The strategic planning of logistics is closely related to the rise and fall of a modern enterprise. With the constant social progress and fast economic development, the social and economic environment faced by enterprises is continuously changing and there exist uncertainties of strategic planning of the logistics of enterprise. The thesis discusses about the Three-tier model, its activities and technologies in the context of the concept design. The research can not only serve as a theoretical guidance, but also be applied to the real-world issues. From the perspective of the relationship between concept design and value flow of enterprises, it advances methods of implementing logistic strategy in enterprises. To ensure the effective implementation of logistic management, a platform is indispensable that will be formed by making use of the Internet and the intranet.
An Economic Comparison between Electric and Conventional Vehicles Based on System Dynamics
Authors: Xu Jian Quan , Yang Yan Ping , Yin Ren Shu
Published: October 2013

Currently the number of electric vehicles on road is still small, the main reasons are their high cost, poor economic returns, which lead to their weak market competitiveness. In this paper, a system dynamics model was built to compare the life cycle costs of the electric vehicles and the conventional vehicles using Vensim. The results show that by the second half of 2016, the electric vehicles will be more economical than the conventional vehicles, and with the passage of time and the progress of technologies, economic benefits of electric vehicles would be more significant, and then the electric vehicles market could enter a period of rapid development.
Research on Value Chain of China's Railway Oil Supply Chain
Authors: Chen Jia Juan , Yan Kui , Huang Ting Ting
Published: October 2013

The efficient and economic organization of railway oil supply is very significant to reduce operating costs and ensure the safety. This paper introduces the processes of China's railway oil supply system and uses value chain model to analyze current railway oil supply pattern by analyzing the value activities and value orientations, points out the problems, proposes the optimization directions and adjustment recommendations. It provides the revolution of China's railway oil supply system with a basic direction.
Friction and Wear Property of Ti(C,N)/ZrO2/WC Nano-Composite Cermet Die Material
Authors: Ma Jun , Xu Chong Hai , Yi Ming Dong , Xiao Guang Chun , Wang Xing Hai
Published: October 2013

Ti (C,N)/ZrO2/WC nanocomposite cermet die materials were fabricated by vacuum hot pressing process, the materials have better comprehensive mechanical properties. The friction and wear properties of Ti (C,N)-based nanocomposite cermet die materials were studied, and the worn surfaces microstructure were observed and analysed by SEM and XRD. The experimental results showed that when the rotate speed was higher, the coefficient of friction of the developed cermet die material, which is 0.3-0.4, was lower than that without the addition of nanoZrO2 and micrometer WC. The main wear mechanisms were abrasive wear, oxidation wear and adhesive wear.
Impact Resistance of Shear Thickening Fluid (STF)/Kevlar Composites for Body Armor Application
Authors: Zhao Shuang , Zhang Ming Yue , Ren Ya Nan , Yang Wei , Wu Si Zhu
Published: October 2013

A molecular colloidal shear thickening fluid (STF), polyborondimethylsioxane (PBDMS) was synthesized, which differs from traditionally studied Silica/PEG system. Differential Scanning Calorimetry (DSC), the controlled stress rheometer.etc, were used to characterize the produced PBDMS. Scanning Electron Microscope (SEM) is the method to get the surface morphology of the Kevlar fabric impregnated by the fluid. Meanwhile the ballistic and stab tests of the composites materials were investigated.