bluuebunny/crossref_metadata_2025 huggingface dataset:
Fuzzy Information Retrieval Method Based on Fuzzy-Valued Concept Networks
Authors: Wang Liu Yang , Yu Yang Xin , Zhou Lei , Jin Sheng Hua
Published: February 2014

In order to reduce the time of fuzzy inference, the relevant matrices and the relationship matrices are used to constitute the fuzzy-valued concept networks. The elements of a relevant matrix represent the relevant degrees between concepts. The elements of a relationship matrix represent the relevant relationships between concepts. Fuzzy positive association relationship or fuzzy negative association relationship are used for formulating users queries in order to increase the flexibility of fuzzy information retrieval systems. Expanding the fuzzy-valued concept network architecture to the Internet environment, we propose a fuzzy information retrieval method based on the network-type fuzzy-valued concept network and it can be relatively more effective information retrieval in the distributed network
Study on Calibration of the Dielectric Sensor Based on FDR by Pavement Structures
Authors: Wang Bo , Wang Feng Cheng
Published: February 2014

Considering the detection of pavement moisture content not currently specialized sensor, this paper has studied the dielectric sensor based on FDR working principles, properties and condition. The dielectric sensor based on FDR was used for the exploratory study pavement structures and brief description the embedding method and technical requirements. The dielectric sensor based on FDR readings law was summarized by a variety of materials and field calibration method, the dielectric sensor based on FDR being used for field calibration method and data processing method was mastered first-hand data, and the detection of pavement moisture content was resolved preliminarily as the foundation for subsequent problems relating to studying in this paper.
Existence of Periodic Solution for a Class of Symmetric Superquadratic Second-Order Non-Autonomous Hamiltonian Systems
Authors: Jiang Qin , Ma Sheng
Published: February 2014

In the paper, by the symmetrical Mountain-Pass lemma in critical point theory, the existence of infinitely anti-and odd periodic solutions with a fixed period is obtained for a class of symmetric superquadratic non-autonomous Hamiltonian systems.
The Series Solution of Fractional Partial Differential Equations via Homotopy Analysis Method
Authors: Yu Jia Ju
Published: February 2014

In this letter, we apply the homotopy analysis method (HAM) to obtain analytical solution of the fractional equation where the fractional derivatives are Caputo sense. The example is given to show the efficiency of the method.
On Semilattices of R-Ample Semigroups with Left Central Idempotents
Authors: Sun Yan
Published: February 2014

In this article, the semilattice decomposition of r-ample semigroups with left central idempotents is given. By using this decomposition, we show that a semigroup is a r-ample semigroup with left central idempotents if and only if it is a strong semilattice of , where is a monoid and is a right zero band. As a corollary, the characterization theorem of Clifford semigroups is also extended from a strong semilattice of groups to a strong semilattice of right groups. These theories are the basis that the structure theorem of r-ample semigroups with left central idempotents can be established.
Mediating Cross-Domain Network Threat in Cooperative Way
Authors: Cao Hua Yang , Zhu Pei Dong , Bi Wen Qi
Published: February 2014

Network attacks, either in aggressive or silent way, are main threat to network security. Modern network environment normally involves multiple domains, and there are connections between them, so an adversary can impact the important network domain via attacking a normal one. When the threat is found in one domain, there isnt a mean to identify how large scale this threat has spread, and there isnt an effective method to mediate such threat. This paper focused on detecting the real topology of multi-domain network and proposed a cooperative method to mediate the threat propagation. The network topology is identified by tracing the propagation of designed benign worm, and the cooperative method is based on novelly collaborating local firewalls on hosts. Performance evaluation is given at the end of this paper to demonstrate the feasibility and effectiveness of the proposed measure.
On the Research of Cloud Service and Library in China
Authors: Xu Shui , Liu Bang Fan , Zhang Wei Fan
Published: February 2014

Current domestic study on cloud service and library is still relatively weak and it needs all to be promoted whether from the research system to see or to see the depth of research. On the view of current domestic research, it is mainly reflect in the following three points. First, there have fifty published academic theses. Second, the main focus of research are still focused on the cloud platform and cloud service model. Third, the related research and disciplinary platform are still relatively narrow.
Protocols Analysis by Base-Function
Authors: Zhao Wen Hong
Published: February 2014

A new description method of protocol structure is presented by base-function firstly. Then, a protocol analysis method base on it is proposed. To analyses the private protocols, a new self-learning algorithm is discussed. Finally, the flow of protocol analysis based on base-function is given. Experiment results show the efficiency of presented method.
Research into Metro Project Management System Based on 4G Network
Authors: Han Jian Jun , Cheng Yu
Published: February 2014

This paper begins with analyzing the characteristics of metro project construction, creatively puts forward building a metro project management system by using the existing 4G network. It gives the structure diagram and function chart of metro project management system based on the 4G network as well as illustrating the implementation methods of important functions and key technologies.
Research of Autonomous Learning System of University Based on Virtualization Technology
Authors: Liu Ying , Yao Jun
Published: February 2014

Through the research of virtualization and cloud computing platform, the thesis is aimed at the problem of autonomous learning system and propose the solutions. This is the starting point in the application of the technology of cloud computing, and for further research on the construction of digital campus is based on cloud computing technology laid the foundation. This system has been completed the demonstration in the virtual cloud platform programming with Java combined with HBase .
The Design and Implementation of Short-Range Communications System in Mobile Community
Authors: Cheng Ke Fei , Zhou Qian
Published: February 2014

With the promotion and popularity of smart-phone, the technology of short-range wireless communications is maturing with each passing day. The situation where communications is based on the services provided by ISP is changing. By using the smart phone as a carrier, this paper discusses how to design a flexible and handy solution of the services of community communication, based on the Ad Hoc network architecture. On the basis of the infrastructure and the function modules of the mobile community, this paper proposes the method to achieve the key modules. Experimental result shows that the proposed solution of mobile community can meet the demands of the short range of the communication system.
The Research of the Magnetic Guidance Prototype
Authors: Cao Xiang Feng , Guan Zhi Chuan , Feng Guang Tong , Sun Feng
Published: February 2014

Magnetic guidance drilling technology is use of magnetic guidance instrument measuring the distance between the signal source and the location of the instrument, and it is used to control the well trajectory to connect or parallel the target layer. And it is an effective supplement of the existing steering drilling technology. At present, the magnetic guidance drilling technology is mainly applied to drill horizontal wells in pairs for the super heavy recovery, CBM horizontal connected wells, underground soluble minerals, relief well and so on. This paper introduces the research process of the magnetic guidance prototype.
Link Assignment for Wireless Sensor Networks with Load Balancing Control
Authors: Yang Yan Hong , Zhang Xiao Tong
Published: February 2014

This paper proposes and analyzes load balancing control in which numbers of sensors randomly join the original network. Sensors are better suited according to some metrics than arbitrary accessing. Analytic performance results are made in terms of message complexity, link changes and delay. Specially, we discussed the link assignment in dynamic network which is caused adjustment. In load balancing control, sensors are selected based on transmission queue and children number. Results indicate that with observed metrics contributes to better performance.
Study on RFID Authentication Technology Based on Public-Key Algorithms and HASH Function
Authors: Wang Chang Quan
Published: February 2014

As an advanced information recognition and data capture techniques,RFID are widely used in many areas. However, due to the RFID tag works and cost constraints, information security through wireless channel is threatened. Through analyzing the security risks and existing defect of the RFID authentication protocol,this paper proposes a new RFID authentication scheme combined public key encryption algorithm and hash function. Analysis result shows that it has higher security and the smaller resources consumption in achieving.
Design on DDoS Attack Detection and Prevention Systems
Authors: Li Feng , Wang Hai Ying
Published: February 2014

For DDoS attacks, it must be sniffing this step, the attacker to be able to successfully launch the final realization of the invasion and attack, we must find a suitable host computer and can be used as hosts puppet machine. In this thesis, a DDoS attack detection technologies, and further proposed based DDoS attack defense system design, the results show that our design can effectively prevent DDoS network attacks.
Abnormal Network Behavior Analysis System Based on Traffic Monitoring
Authors: Li Feng , Wang Hai Ying
Published: February 2014

This study based on characteristics of network traffic is significant, it can improve network design, improve network performance, is often used in the abnormal traffic detection and so on. In this paper, the significance of abnormal flow monitoring is design based on an analysis of network behavior anomaly traffic monitoring system, the system for use of the network traffic characteristics of network attacks detected has a good prospect.
Research on Data Quality of E&P Database Base on Metadata-Driven Data Quality Assessment Architecture
Authors: Huang Gang , Wu Xiu Ying , Yuan Man , Li Rui Fang
Published: February 2014

So far there have never been systematic evaluation criteria and entire assessment and evaluation system in Data quality internationally. Based on the research on the relative content of both international and domestic data quality, this article analyzes the requests of data quality for the large enterprises. First of all, this paper raises and builds a complete data quality assessment system. Second, the definitions and specific algorithms of data quality assessment indicators and poses data quality analysis are built to evaluate the architecture and processes. A frame structure of data quality meta-model is presented in this paper. In addition, this paper also designs an evaluation system. This system includes the classification and definition of data quality and the algorithm in evaluation index and the system and process of data quality evaluation. This paper provides credibility basis for enterprises in evaluation of data quality.
Metal Detecting Sensor Based on Linear Hall Effect Elements
Authors: Zheng Zhe , Zhang Ren Jie
Published: February 2014

This paper presents a new type metal detector measurement system based on linear Hall-effect elements. This system adopts a low voltage DC power supply, which drives a U type (or C type) core coil to generate a magnetic field space. Two linear Hall-effect elements are placed at the center of core coil measurement section. With the differential operational testing method, the sensing signal is collected and displayed with SCM system. In the paper, we analyze the feasibility of the measurement system in theory. Further a practical measurement device is designed and produced to verify the theoretical analysis. Experiments data shows that, within a sensing gap between 0.5mm and 3mm, this new Hall-effect element metal detection equipment could effectively resolute nondestructive metal and the damage metal with small cracks, especially sensitive to the longitudinal crack. As a conclusion, this metal detector has several advantages such as simple structure, small volume, low cost, no radiation, so that it would be convenient for production, carrying and application. The new type metal detector measurement system proposed in this paper has important significance for industrial and manufacturing production testing and maintenance of equipment.
Malware Analysis Platform Based on Secondary Development of Xen
Authors: Bai Jin Rong , Zou Guo Zhong , Mu Shi Guang
Published: February 2014

The API calls reflect the functional levels of a program, analysis of the API calls would lead to an understanding of the behavior of the malware. Malware analysis environment has been widely used, but some malware already have the anti-virtual, anti-debugging and anti-tracking ability with the evolution of the malware. These analysis environments use a combination of API hooking and/or API virtualization, which are detectable by malware running at the same privilege level. In this work, we develop the fully automated platform to trace the native API calls based on secondary development of Xen and have obtained the most transparent and similar system to a Windows OS as possible in order to obtain an execution trace of a program as if it was run in an environment with no tracer present. In contrast to other approaches, the hardware-assisted nature of our approach implicitly avoids many shortcomings that arise from incomplete or inaccurate system emulation.
The Design of a Physical Education Subject Testing System
Authors: Zhang Jian Jun , Yang Jin Bao , Yang Jia Lang
Published: February 2014

In this paper, a physical education test system is proposed and implemented, which is designed to solve slower testing and lower degree of electronic information in current college entrance physical examination. This system is consisted of single chip microcomputer, ultrasonic and infrared sensors, modeled by using the Unified Modeling Language, designed by using the Model-View-Controller design pattern, and implemented on the Microsoft Visual Studio 2010 development platform with SQL server 2008. Improving test efficiency, reducing error rate, and more fairness are achieved through practical application of this system.
Extracting Images from Chinese PDF Documents
Authors: Yin Yong Hua , Jin Ying , Zhu Quan Yin , Yan Yun Yang
Published: February 2014

In order to efficient tap the potential value in Chinese PDF documents and use Chinese PDF documents, an unique idea that extracting images from Chinese PDF documents is proposed in this paper. The idea combines PDFs document structure and page tree to extract images. Based on this idea, the experiments in this paper are done with one hundred Chinese PDF documents. And the extraction rate of the experiments obtains 83.56 percent. According to the analysis of experimental results, it is proved that the idea proposed in this paper is applicable to most of Chinese PDF documents and it is able to meet most of the needs of practical application.
Study of Page Replacement Algorithm Based on Experiment
Authors: Wang Hong
Published: February 2014

The page replacement algorithm is an very important step which realize virtual memory control. A good page replacement algorithm can reduce the fault frequency when program executing, reduce the number of I/O, and then increase the systems efficiency effectively. In this paper, we studied the principle of various of page replacement algorithm, designed an program which simulated the procession and result of page replacement algorithm, in this program, we assume a few condition, record the experiment results. According to these data, we compared and analyzed the page fault and page fault frequency of different algorithm, and compare their performance.
Intelligent Traditional Chinese Hairstyle System in Computer Animation
Authors: Tang Jun , Zeng Yu Lin
Published: February 2014

Traditional Chinese hairstyle is an important part of the traditional Chinese culture, which provides rich material for computer animation. The creation process of traditional Chinese hairstyle model in computer animation is complex working and time-consuming. This study establishes the traditional Chinese hairstyle database, which covers from Tang Dynasty to Qing Dynasty. According to the characteristics of the traditional Chinese hairstyle, this study develops an Intelligent Traditional Chinese Hairstyle System by MEL, which can display the condition of traditional Chinese hairstyle models in real time and change attributes related with models efficiently. The system is the combination among computer technology, animation art and traditional Chinese culture. It will improve the efficiency and quality in the computer animation creation.
Fast and Effective Congestion Refinement Technique
Authors: Zhao Yan , Zhao Yin Yao , Qian Xu
Published: February 2014

Due to the promotion of modern design feature, the placement solution is becoming more and more difficult to route. Previous routability-driven based technology is usually coupled with the original placer, which is difficult to be widely used in various placement tools. In this paper, we proposed a tool called CRT (Congestion Refinement Technique), which is independent of any placer and any router, and can be applied to various placemen to improve the routability. CRT is a congestion-driven based module shifting technique. Basically, CRT is one kind of technology that better allocating routing resources by shifting the modules. The boundary of tile is shifted in the horizontal and vertical directions without affecting the original placement. Here a longest path solution is presented to solve the problem fast and effectively. The experimental results show that the CRT can effectively alleviate the congestion of unroutable placement solutions. We apply it to placement solutions generated by placers on ISPD2011 [ placement benchmarks. From the result we can see that CRT greatly improves the routbility and saves execution time for the routing stage after refinement.
The Practice of BIM Technology in Railway Station
Authors: Li Huan , Mao Ling
Published: February 2014

The practice of BIM technology in the entire life cycle of East railway station building. BIM technology has many advantages in the visualization, coordination and simulation relative to the traditional two-dimensional design. The paper summarizes the use of BIM technology in the design phase of railway station, and point out the use directions of BIM technology in the next stages of construction and operation.
Automatic Corn Potted-Seedling Transplanter of Cycloid Gear Trains
Authors: Yin Da Qing , Wang Jin Wu , Zhao Yun
Published: February 2014

On the basis of the existing potted-seedling transplanting mechanism, a new type of transplanter,a automatic rotary potted seedling transplanter of "Cycloid gear train" was proposed .The trajectory and posture were analyzed while the corn potted seedling was transplanted, the principle and characteristics of the transplanter were demonstrated, the kinematics model was established, and the equation of (anglar) displacement, (anglar ) velocity, and (anglar) acceleration were deduced. Based on above research results, the transplanters computer aided software was developed with Visual Basic6.0, then the structural parameters were calculated which could meet the work requirement . Before the prototype is designed, the feasibility of the structure can be proved through the test of the software, and then the final data would be got: α1=334°, α2=0°, α3=66°, α4=-40°,α5=90°,α6=110°,l1=106mm,l2=187mm.Two-dimensional and three-dimensional drawings were drawn according to above data; the designed model was simulated by ADAMS, the trajectory and posture that meet the work requirements were verified, too.
Vibro-Acoustic Coupling Analysis of High Velocity Aircraft Based on Hybrid Acoustic Simulation Method
Authors: Zhang Li Jun , Chen Xiao Jiao , Wang Jia , Li Min
Published: February 2014

High-speed aircraft is in service condition of high temperature, high pressure and strong noise during flight. Strong noise will damage structures and equipments of an aircraft, and the existence of high temperature and high pressure will greatly increase the damage degree. Therefore, research on aircraft structure characteristic and surface acoustic characteristic is very significant. The hybrid method of CFD and acoustic solver combination method can accurately obtain aerodynamic noise load on the aircraft structure surface in a high velocity environment. The hybrid method can make acoustic and vibration analysis for aircraft structure, and get influence of noise load on it. The simulated results show that the presence of high temperature and high pressure can make the natural frequency of typical components and whole machine model reduction, and the acoustic load on the aircraft structure model surface is larger at low frequency, smaller at high frequency.
Networked Control Systems Based on New Smith Predictor and Fuzzy-PID Controller
Authors: Zou Zi Ming , Liu Xiao Yang , Zeng Jie Hui
Published: February 2014

To the question of networked control system with random time-delay in both forward and feedback channels, a new class of Smith predictor combined to Fuzzy PID control is presented. It sets up a new Smith forecast model and designs the parameter self-tuning fuzzy PID controller. The results of system simulation using MATLAB show that the network control system of the proposed scheme has better dynamic and stability, and in the case of model miss-matching has high robustness.
A New View of Mode Mixing Phenomenon
Authors: Du Yan Rui , Chen Li Hui , He Jin
Published: February 2014

The EMD method is to separate a composite signal into simple oscillatory mode functions called intrinsic mode functions (IMFs) which are generated by a sifting process. IMFs can lose their physical meaning when mode mixing phenomenon occurs. For mode mixing, do not have an exact definition by now, the purpose of this paper is to analysis the mode mixing phenomenon in the EMD method and to advance a new view of mode mixing. By the model and the simulations, we point out that cutoff frequency and the extrema rate of signal is the fundamental reason of mode mixing.
An Algorithm of Digital Image Watermarking Based on Turbo Code and Particle Swarm Optimization
Authors: Wang Yong Qi , Zhang Hui
Published: February 2014

To protect the copyright information of digital images, this paper presents a combination of Particle Swarm Optimization and turbo code of the image watermarking algorithm. Firstly, in order to enhance the security of watermark information, binary image is encrypted by Aronld transform and error correction coding technology. Based on the block of the host image, according to human visual properties, make discrete cosine transform to the block with larger texture complexity, and embed the watermark information in the low frequency coefficients of discrete cosine transform with the embedding intensity of watermarking searched by PSO. The simulation results show that the algorithm not only improves the security of the watermarking, but also has better robustness and invisibility of the watermarking.
Research on Demodulation Algorithm of PCM/FM Signal
Authors: Fu Gang , Feng Yue , Wu Guang Zhi , Wang Li Ping
Published: February 2014

According to the characteristics of PCM/FM signal demodulation, the research based on short-time Fourier transform STFT software resolving method. First detected using STFT f1 and f0 corresponding spectrum energy, according to the comparison of two energy spectrum of element. Software demodulation system is discussed in detail the synchronous digital detection and software algorithms, analysis of demodulation performance of the algorithm. The simulation and test results verify the effectiveness of the method.
Application Research of Integrated Design Using Reinforcement Learning Model
Authors: Cao Jian , Yan Cong , Wang Xiao Nan
Published: February 2014

RL can autonomously get optional policy with the knowledge obtained by trial-and-error and continuously interacting with dynamic environment. firstly, the model and theory of reinforcement learning is given. Then, a description of the controller architecture and associated stability analysis is given, followed by a more in-depth look at its application to a tiltrotor aircraft. This is followed by a summary of future research directions, and possibilities for technology transition that are currently underway.
Motion Control System and Control Algorithm of 3-Axes Platform Based on Controller Area Network
Authors: Zhou Cheng Long , Wang Xing Song , Mao Yu Liang
Published: February 2014

3-axes motion is broadly used in industry numerical control machine. Many motion controller we use are usually limited by the number of interface it consist. But the kind of motion controller based on CAN (Controller Area Network ) can solve this problem properly. We can add a controller of one axe conveniently. I use a Advantech CAN motion controller to build the motion control system.
The Internal Model Control of Greenhouse System Based on LS_SVM
Authors: Dai Qing Ling
Published: February 2014

The greenhouse environment has the characteristics of nonlinear, time-varying, large time delay, so it is difficult to obtain satisfactory result using conventional control method. The internal model control system method and the algorithm based on LS_SVM is proposed for the problem. The simulation experiment was performed on the greenhouse environment control system. Results shows that the controlled object internal mode and inverse model have very high precision and generalization ability and the control system has not only good control performance but also strong anti-interference ability and robust performance which has the great value to application and extension
Model Reference Adaptive Motion Control Research of Servo Press
Authors: Zhang Juan , Wang Xing Song
Published: February 2014

Servo press is a new developing trend in forming equipment. In order to improve the position control accuracy, the movement rule of crank press slide block is analyzed. In view of the servo press poison PID control algorithm parameters cant realize real-time adjustment, model reference adaptive control strategy is presented, and a real-time control experiment platform is established in xPC target environment based on MATLAB RTW. The experiment results shows that the model reference adaptive control strategy is of higher accuracy and better robustness than the PID control strategy.
Research and Application on NURBS Curve Inverse Algorithm
Authors: Zhao Yu Gang , Cai Tian Ci , Wang Zhan Jun , Liu Xin Yu
Published: February 2014

Firstly, based on the Cox-de Boor recursive formula, random degree NURBS curve generation algorithm is given. Then, this article discusses knot vector, the weight factor's influence on NURBS and presents the determination method of knot vector and weight factor. Secondly, NURBS curve inverse algorithm is studied and the focus is on cubic NURBS curve inverse algorithm, which is widely applied in engineering. Finally, based on C++ Builder development environment, the paper completes algorithm simulation and gives the specific application examples. Examples verify the efficiency and reliability of the algorithms, which has a high practical value in the CAD/CAM.
Modeling and Performance Analysis of Switched Reluctance Motor in Electric Vehicles
Authors: Zhu Yue Ying , Mou Jiang Feng
Published: February 2014

The power performance of the Switched Reluctance Motor (SRM) drive used in electric vehicles is very important for improving the dynamic performance of the vehicle and matching the parameters of the vehicle power train. In order to analyses the drive performance of the SRM drive under the electric vehicle, the nonlinear dynamic model of the SRM drive is established in the MATLAB/Simulink environment. Then the vehicle dynamic load model is designed to connect with the SRM drive model, and the performance analysis of the SRM used in the developing electric vehicle is carried out based on power output and equivalent power factor. The analysis results are significant for the design and improvement of the electric vehicle.
A General Inverse Kinematic Analysis of 6-Dof Articulated Manipulators
Authors: Yang Xiao Ping , Zhou Ke , Ni Zao
Published: February 2014

This paper summarized the basic structure of industry articulated 6-dof manipulators, general DH parameters were obtained by the DH modeling method and the general analytical solution methods was derived. For different structural forms and different coordinate systems establishing method, this solution can give consistent results, and the industrial manipulator inverse kinematic analysis method was simplified.
A Practical Real-Time Motion Cueing Algorithm for Crane Simulator
Authors: Zhu Ze , Xiao Han Bin , Wang Guo Xian , Hu Kan
Published: February 2014

This paper addresses motion simulation issues involved in a crane simulator with a 6-Degree-Of-Freedom platform. The crane dynamical models in terms of a range of motion equations are built for the operator cab in various main operating conditions. The ways to make the motion to be reproduced are investigated and the corresponding real-time motion cueing algorithm is proposed based on a special curve-merging approach. The algorithm is of simplified form and the needed computing time is very short, which makes it very practicable. The crane simulation system with this algorithm being adopted has been successfully developed and put into practice. The field application showed that the algorithm is able to ensure achievement of satisfied motion cueing effects. The proposed motion simulation models and the corresponding algorithm will provide significant reference value for developing similar motion simulation systems for all types of large-scale cranes or construction machinery.
Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding
Authors: Shen Nan Yan , Li Jing , Wang Xue Dong , Ye Jun , Yu Zhi Xiang
Published: February 2014

Due to the discontinuous axis and the big ratio of length to diameter, the large-scale crankshaft is easy to generate the complex elastic deformation under the effect of the huge gravity and the clamping force on non-circular grinding machine. The distinctive deformation deteriorates the coaxiality of all the main journals and thus the grinding precision of crankpins in non-circular grinding. In this paper, the statics analysis of large-scale crankshaft has been conducted by using the finite element simulation. The overall deformation of crankshaft and the position offset of each main journal center without or with the auxiliary supports have been simulated and contrasted. The results manifest that the auxiliary support forces produced by the steady rests have the positive effect on the compensation for crankshaft deformation. On this basis, to satisfy the demand of position adjustment of the upper and lower support pads of servo-controlled open steady rest, the on-machine measurement method and device of the position of main journal center is proposed. And then the offset calculation model of the main journal center is deduced using the measured data. The measurement method and device are beneficial for the straightening of the crankshaft and the improvement of machining accuracy of crankpins in non-circular grinding.
The Sensorless Control of IPMSM Based on the Extended State Sliding Mode Observer
Authors: Liu Jia Xi , Du Peng Cheng , Li Li Yi
Published: February 2014

This paper presents a novel method to estimate the rotor position based on the linear flux. Firstly, Interior Permanent Magnetic Synchronous Motor(IPMSM) mathematics model is established in the stationary frame based on linear flux, and rotor position is estimated by the extended state sliding mode observer. Secondly, the second order non-singular terminal sliding mode control is put forward to substitute for linear sliding mode in combination with the advantages of the high order sliding mode and non-singular terminal sliding mode due to the low converging speed of linear sliding mode and chatting. The stability of observer is proved by Lyapunov theory and the adaptive of sliding mode gain matrix is obtained. Thirdly, the effect of varieties of stator resistance and q-axis inductance on sliding mode observer estimated flux amplitude and phase is analyzed quantitatively. Rotor position and speed are obtained by PLL. Finally, the simulation and the experimental platform of sensorless IPMSM full-digital vector control system are designed. The experiment results prove the correctness and feasibility of this algorithm mentioned in the dissertation
Design and Experiment of Thermal Water and Mechanical Deicing Device
Authors: Zhu Zi Cheng , Zhang Xue Jun , Mou Guo Liang , Li Chao Xin , You Jun
Published: February 2014

Fast and economical removal of icing snow on the airport runways, road, highways and other roads is a problem for reducing traffic accident rate in frozen weather. Based on the analysis of current researches on various deicing methods, a new deicing method that combines thermal deicing method, water-jet cutting with mechanical deicing technology was presented. This context introduces the construction and working principle of this device, and milling cutting model was constructed, power calculation of milling equipment is also carried out. Subsequently, indoor experiments results was repeated. The feasibility of this scheme is validated by experiments of the compound equipment.
Optimization of Roadheader Crawler Parameters Based on the Theory of Driving
Authors: Fei Ye , Zhang Wei Na , Wu Zhe Hao
Published: February 2014

The heading machine is one of the key equipment of coal mine roadway drivage, and cantilever machine applied most widel, A lot of coal roadway floor condition is very poor in our country, so its travel mechanism performance also have a higher requirements. Especially when driving on slopes, frequently, caterpillar not firm grip, and backward. This article is based on crawler and the ground interaction theory optimization model is established, the crawler structure parameters are optimized in order to obtain maximum tractive force,thereby improving the performance of walking.
Precise Frequency Calculation Model on BTA Boring Bar
Authors: Zhao Wu , Jia Wei Tao , Zhang Quan Bin , Hu Zhan Qi
Published: February 2014

For the purpose of precise calculation on intrinsic frequency of the deep-hole boring bar in trepanning heavy-duty processing, a new frequency calculation model is proposed, based on the synthetically investigation of the axial press effects, intermediate supported, Coriolis inertia effects induced by cutting fluid and other relevant various factors of boring bar. The boring bar can be decomposed into the two parts, corresponding to the liquid-solid coupling vibration model inside the work part and Timoshenko beam model outside the work part, respectively. Then assume the whole system as continuous equal span beam model to combine these two parts. Through nesting liquid-solid coupled vibration model (considering cutting fluid velocity) and Timoshenko beam model (containing axial pressure and lateral bending) among the continuous beam model (considering equal span), the precise calculation on intrinsic frequency of the boring system can be completed.
Shallowly Discuss the SUV External Projections Check
Authors: Yu Guang Xu
Published: February 2014

The paper check external projections of the SUV to provide measurement methods, design methods and design basis,research how to meet the regulations beyond to the example to analysis the request of GB basing on GB11566-2009.
Thermal Fatigue Analysis of HSK Shrink Toolholder
Authors: Chen Jian , Tian Liang , Shang Hong Mo , Wang Gui Cheng
Published: February 2014

The principle which the tool is embedded into the HSK shrink toolholder is expanding with heat and contracting with cold. The thermal cycle that the tool is embedded into or taken out the toolholder is heating toolholder and cooling it quickly. After a few thermal cycles, the HSK shrink toolholder is damaged with the way of thermal fatigue. The analysis of thermal fatigue is transient heat transfer and stress coupling and the temperature distributionstress and strain of every time are gained in thermal cycle. The fatigue of shrink tool holder is strain fatigue by analyzing the stress. The fatigue life is gained with Coffin-Manson formula.
Development of High-Speed Response Electromagnetic Linear Actuator Using for Pneumatic Control Valve
Authors: Chung Myung Jin
Published: February 2014

Analytic model of electromagnetic linear actuator in the function of electric and geometric parameters is proposed and the effects of the design parameters on the dynamic characteristics are analyzed. To improve the dynamic characteristics, optimal design is conducted by applying sequential quadratic programming method to the analytic model. This optimal design method aims to minimize the response time and maximize force efficiency. By this procedure, electromagnetic linear actuator having high-speed characteristics is developed.
The Modal and Harmonic Response Analysis of the Oil and Water Separation Process under the Shaft
Authors: Cao Xi Cheng , Jiang Ming Hu
Published: February 2014

Compared with the traditional drilling string, the components of the new string downhole oil-water separation process is increased. To prevent the vibration fault and structure damage of the new downhole oil-water separation process string, the analysis of the finite element, modal and harmonic response on the structure system made. By solving the dynamics equation, the finite element model is determined, the inherent frequency and vibration model are calculated, and the vibration characteristics of system structure are analyzed. By analyzing the harmonic response and determining the reasonable speed of the string, the dynamic characteristics of the structure is optimized.
Development of a Grinding Carriage for an Inner Cooling Grinding in a General Grinding Machine
Authors: Zhang Liang Dong , Wang Yong , Li Zhi Rong
Published: February 2014

As inner cooling grinding can break the closure of grinding area and solve practical engineering problems resulting from too high grinding temperature, it can be used to realize the grinding of difficult-to-machine materials, such as Titanium alloy, in a general machine such as M7130. An inner cooling grinding wheel, a grinding carriage and cutting fluid system are the key parts of a inner cooling grinding system, and an inner cooling grinding wheel must be fixed on a plain grinder by a grinding carriage, so this paper mainly studies how to design and manufacture a tooling for an inner cooling grinding wheel, which has simple construction and reliable performance. Grinding experiment shows it can dramatically reduce cutting temperature and effectively avoid grinding burn, thus grinding quality is improved.
Heat Transfer Analysis of Exhaust Manifold with Water Jacket of a High Speed Gasoline Based on FSI
Authors: Yang Jing , Lu Zhen , Li Ke , Wang Yi
Published: February 2014

The fluid-structure interaction (FSI) method is employed to analyze heat transfer of a exhaust manifold with a water jacket. Three different turbulence models are valued to predict their spheres of application. The mutual effect on complex flow distribution and heat transfer with and without transition is also considered respectively. The results show that reasonable turbulence model and transition will contribute to a better numerical precision of temperature distribution. Considering transition will have a impact on the design of novel exhaust manifold of high speed gasoline engine. In addition, numerical results can be referred to improve the structure.
Numerical Simulation for the Spray Field in Absorption Refrigerator for Automotive Air-Conditioning
Authors: Qiao Hai Jun , Wu Jia Nan
Published: February 2014

Absorption cold source in the vehicles differs from ordinary absorption cold source especially in its narrow space and relatively compact arrangement. In this study, CFD simulation technology, simulation and analysis of spray flow field in an absorber of automotive absorption refrigerator is carried out to verify the effectiveness of packings. This could lay a foundation for making further improvement on performance of car's absorption cold source
The Design of Indexable Gear Insert and Cutting Parameter Optimization
Authors: Chen Jian , Shang Hong Mo , Tian Liang , Wang Gui Cheng
Published: February 2014

The gear is widely used in manufacturing industry. The object of study is straight spur gear. According to the feature of involute gear, a three-edged indexable milling insert is designed. Firstly, the milling model is built in Deform3D. Then, the optimal relief angle is gained based on the cutting temperature and the optimal relief angle is 6°. The cutting parameters are researched and the optimal parameters are obtained according to the cutting force.
Numerical Simulation Study of Metal Transfer in MIG Welding with Magnetic Control
Authors: Yang Chao , Jiang Shu Yuan , Bi Hai Bo
Published: February 2014

This paper simulate the mode of metal transfer in MIG magnetic control welding by using CFD software FLUENT, establishing mathematical model based on fluid dynamics and electromagnetic theory, and simulate the form, grow and drop process of metal transfer with and without magnetic. Meanwhile, do experiments to confirm the simulate result, and it is well consistent with the experimental result.
Mechanical Performance Degradation Rule of Deformed Bar under Different Corrosion States
Authors: Hao Bao Hong , Guo Ju Yi , Zeng Ding , Zeng Qi Hui
Published: February 2014

This paper will systematically study the different shapes of steels corrosion rate under different corrosion environments through accelerated corrosion test of orthogonal experiment and the corresponding physical tests and electrochemical detection methods. The experimental results show that the corrosion resistance of the deformed bar is poorer than the plain round bar. In the same corrosive environment, its tensile strength, yield strength and elongation decline are more significantly than the round steel, and the change of the elongation is more obvious. Experimental results also show that in the environment which is absence of chloride ion, reinforced is basically with uniform corrosion in previous time, late stage for the development of local corrosion, the mechanics performance index is also present a corresponding positive correlation with the corrosion situation. But the uneven corrosion condition appears at the previous period when it is in the chlorine ion environment. In this condition, the mechanical performance and corrosion situation is no longer in linear relationship, but the trend of rapidly decline. Results of weightlessness rate test confirm that the correlation of degree of corrosion and the mechanical properties.
Research on Parallel Operation Technology of Following-Setting Compensation Mode Arc-Suppression Coils
Authors: Cai Bo
Published: February 2014

currently, more and more following-setting compensation arc suppression coils are applied. When the power distribution network is operated in a loop closing mode, the problems about the parallel operation of the following-setting compensation arc suppression coils are caused. On the basis that the operational characteristics of the following-setting compensation arc suppression coils are analyzed, the improved master-slaved type automatic control technology of the parallel operation of the multiple following-setting compensation suppression coils is proposed. When the capacitive current is calculated, all slave arc suppression coils should go into service with the respective compensating capacity of each when operated on the respective shunt, then the master arc suppression coil is adjusted, and therefore the calculation accuracy is guaranteed. After the calculation of the capacitive current is completed, the compensating current should be proportionally distributed according to the capacity of the arc suppression coils so that the loads of all the arc suppression coils are balanced. The technology is mature and reliable and the practicability of the technology is fully proved by the actual field operation.
Chinese library classification number: TM475;TM761
Production Process Modeling and Realizing Based on Activiti
Authors: Zhang Da Wei , Zhang Rui Yuan , Ma Hong Wei , Cao Xian Gang
Published: February 2014

In a view of the problem of traditional workflow in the manufacturing process management, such as low utilization, complex modeling and difficulty of combing system, modeling based on the commonness of manufacturing enterprise production process, in combination with Activiti workflow engine characteristics, to achieve the goal of integrate process model into system quickly. The whole process, including modeling, packaging, deployment, test validation, is easy to be modified and published quickly. Experimental results show that the Activiti modeling method has the characteristics of flexible, simple and diverse, greatly improvement of the utilization of production process model and the efficiency of modeling.
Analysis Methods of Reasonable Finished State of Space-Twisting Cable Leaning Tower Cable-Stayed Bridge
Authors: Lv Ying Zhao , Chen Guo Qiang , Lei Bo , Ren Wei
Published: February 2014

Aimed to solve the problem that the reasonable finished state (RFS) of space-twisting cable leaning tower cable-stayed bridge (SLCSB) is inconsistence with actual finished state. The numerical analysis and field test methods are used. Firstly, based on comprehensive studying of the interaction between influencing factors of the finished state and construction state, analysis methods of coupling RFS and rational construction state (RCS) are proposed with the thought of construction process control implanting into design stage. Secondly, a main span of 220m SLCSB is used as example, the coupling analysis method proposed in the paper was proved. Finally, with some data measured from actual project, it shows that: this method can ensure the cable tension, the main beam and the main tower bending moments forming RFS at the same time, while the problems of the inconsistency between RFS and one-step bridge status is solved.
Analysis of Structure Technology and Sports Buildings Design Factors
Authors: Chen Xiao Jie
Published: February 2014

Sports building are different from the common civil buildings, which are characterized by strong professional, high technical requirements, especially in large scale, complex function of large-scale comprehensive stadium, frequently become the latest technology, strong ability of science and technology places. At the same time, structural engineering, material engineering, ecology and intelligence information and other scientific and technological achievements to provide a great degree of freedom and comprehensive technical support for the development of sports buildings, this also fully annotated sports material and cultural attribute of buildings. This paper will analyze the main technical factors involved in sports building design, to explore the basic idea of sports building technology based on.