bluuebunny/crossref_metadata_2025 huggingface dataset:
Assessment on China’s Power Mix：A View of MCDA
Authors: Tang Song Lin , Zhang Xi Liang
Published: November 2010

Power sector faces serious challenges, e.g. greenhouse effect, acid rain, supply security, etc, along with the durative price rising of fossil and more worsening of environmental problems. An assessment model of power mix is put forward in this paper, basing on multi-criteria Diversity Analysis (MCDA). The efficient frontier can be gained at the basis of analyzing the power mix’s risk factors, such as environment pollution, supply security, system stability and land use. By the assessment model, the author analyzes the efficiency of China’s power mix in 2008 and 2020. We can find that actual China’s power mix is non-efficient, because of excessively depending on coal-fired plants. In order to decrease the risk of power mix, China should reduce the proportion of coal-fired plants, accordingly increase the proportion of clear energy, such as hydro, nuclear energy, wind energy, etc, in power mix. Hydro is the first choice for China to improve the efficiency of power mix. Nuclear is second at present. However, wind will become the second choice in future, if its cost can decrease because of scale effect.
Research on Optimal Routing Algorithm for Public Transit Transfer Based on the Adjacency Matrix
Authors: Zhang Cai Xia , Zhuang Liang Liang , Wang Xiang Dong , Rong Hai Wu
Published: November 2010

This paper introduces the Adjacency Matrix at the very beginning, the least transfer between two nodes can be obtained by using the Adjacency Matrix, and then Z matrix is introduced to achieve optimal routing algorithm for public transit transfer and to obtain optimal route by using the “two-step-descending-proliferation” algorithm. Through the "two-step" approach, efficiency and feasibility of data processing was increased. The algorithm focus on multi-objective optimization - takes the least transfer, the least cost, the shortest time, and so on.
Experiment Study of Rock Damage and Permeability Meso-Mechanical Coupling Failure Model under Complex Condition
Authors: Zhao Ji Kun
Published: November 2010

Pore water pressure and the changes of crustal deformation, fault rupture and seismic activity has important influence. So the pore water pressure and load rock stress – hydro-mechanical coupling mechanism is very important. This paper mainly studies the rock specimens of hydraulic crack damage simulation. This study found: with the increase of the axial compression, sample is on the surface crack. Crack characteristics is smooth and continuously expanding. With the load increasing at the same time, the number of samples is also increased damage elements. The sample was through the cracks. This is due to the effect of water pressure to reduce the size of confining pressure .From the failure mechanism analysis, the distribution of stress non-uniform material will not uniformity, reflected in the actual rock because of the grain and the defects of the random distribution. When the load, the composition of force transmission effect of different deformation and stress in rock, the internal non-uniform stress concentration, local, it will directly cause the weak part, and micro cracks generated change the failure mode of materials.
A Novel UHF RFID Reader Antenna
Authors: Zhang Xin , Li Lei
Published: November 2010

In this paper, a new ultrahigh frequency circularly polarized microstrip antenna using in RFID reader is proposed. The proposed antenna has a simple structure, it has non-symmetrical rectangular corner truncated square patch, ground plane and a probe feed. To achieve good circular polarization(CP) radiation characteristics, it uses air as the dielectric layer. Simulation results of a constructed prototype with the center operating frequency at 923 MHz showed that the antenna has a return loss S11 of about −24 dB, a gain level of about 9.48 dBi. The antenna has good impedance and radiation characteristics over the required bandwidth, 920-925 MHz (Chinese UHF RFID band).
Augmented Reality on Longwall Face for Unmanned Mining
Authors: Zhang Shou Xiang
Published: November 2010

An unmanned mining technology for the fully mechanized longwall face automation production is proposed and studied. The essential technology will bring the longwall face production into visualization through the Virtual Reality (VR) and Augmented Reality (AR) union. Based on the visual theoretical model of the longwall face, the combination of virtual and reality, the real-time interactive and the 3D registration function were realized. The Key technology and Alpha channel are used to the combination of the real long wall face and the virtual user.
Application of Shapley Value Method in Profits Allocation of Cooperation of Enterprises, Colleges and Institutes
Authors: Wu Shu Qin
Published: November 2010

Cooperation of enterprises, colleges and institutes in essence is the management of knowledge supply chain. The cooperation can bring about excess earnings, with fair and reasonable profit allocation playing the role of power mechanism which facilitates cooperation of partners. We adopt a method that combines qualitative and quantitative research and establishes the profit allocation mechanism bonding cooperation of enterprises, colleges and institutes. Empirical analysis of cooperation profits allocation methods are carried out with the application of Shapley value.
Speed Control of Hydraulic Press via Adaptive Back-Stepping
Authors: Li Chang Bin , Wu Ai Guo , Du Chun Yan
Published: November 2010

This paper is concerned with speed control of hydraulic press system. First, the mathematical model of hydraulic press is derived from its physical characteristics. Then, based on this model, the so-called back-stepping approach is used to design a speed controller. Moreover, in order to overcome the unknown deformation resistance and some other resistance, an adaptive control scheme is introduced to this controller. Finally, a real hydraulic press model is used to validate the proposed method. Simulation results show that the adaptive controller deals with the nonlinearity effectively, and the tracking performance of the system is good.
Wavelet-Based Steganography against Histogram Analysis
Authors: Li Yan Hui , Gao Yu Liang
Published: November 2010

Histogram analysis for wavelet coefficients is powerful steganalysis for detecting the presence of secret information embedded in the wavelet coefficients. In order to improve the security, a wavelet-based steganography against histogram analysis is presented. First, a cover image is divided into blocks, and every block is decomposed into wavelet. Then, if the secret bit is not same as the information denoted by nonzero wavelet coefficient, the absolute value of wavelet coefficient is subtracted by 1, if the value of wavelet coefficient was 0 after embedding the secret bit, the secret bit should be embedded into next wavelet coefficient. If the sum of wavelet coefficients is large, the wavelet coefficients of next level should be embedded by secret information. Finally, the stego-image can be obtained by using the inverse wavelet transform. From the experimental results, the proposed method could effectively keep the identity of histogram for wavelet coefficients and maintain a good visual quality of stego-image.
Genetic Algorithm Based on Permutation Distance for Laser Antimissile Problem
Authors: Sun Yong , Zhang Mao Rui , Liu Wei Wei , Zhang Li Na , Li He
Published: November 2010

The genetic algorithm based on permutation distance definition is used to solve the laser antimissile system. When faced with multiple attacking targets, it is clearly important for the laser antimissile system to determine the sequence of the attacking targets to be intercepted so that the maximum attacking targets are destroyed. It’s very difficult to find the global optimal solution, especially when the number of the targets is greater than six. The permutation distance definition is introduced to measure the distribution of the population. The successive zeros permutation distance is to stop the genetic algorithm iterations. Finally, taking ten targets as an example, the simulation results show that the convergence of the algorithm is fast and this achievement can be used in the real application.
The Application of MISEP Blind Separation Algorithm in Coal and Rock Interface Automatic Identification of Fully Mechanized Mining
Authors: Ding Xin Miao
Published: November 2010

MISEP is a validated Algorithm to separate linear and nonlinear mixture signals,In this paper,the MISEP is used for separating mixture falling sound signals of coal and rock in the process of mining.The MISEP can effectively separates the sound signal of coal and rock. According to the frequency spectrum difference of separated signal,the proportion of coal and rock can be determined,so the coal and rock interface automatic identification can be realized.
A Face Recognition Algorithm Based on Block PCA and Wavelet Transform
Authors: Shi Dong Cheng , Wang Qing Qing
Published: November 2010

As the most successful method of linear distinguish, principal component analysis(PCA) method is widely used in identify areas, such as face recognition. But traditional PCA is influenced by light conditions, facial expression and it extracts the global features of the image, so the recognition rate is not very high. In order to improve more accurately identify facial features and extract local features which account for a larger contribution to the identification. This paper brings up a method of a block face recognition based on wavelet transform (WT-BPCA). In the algorithm, face images are done two-dimensional wavelet decomposition, then from which extract low frequency sub-images. According to different face area makes different contribution to recognition, we use sub-block PCA method. According to the contribution of the block recognition results generate weighting factors, the face recognition rate based on PCA is effectively improved. Finally we construct classification to recognite. Do experiments in the ORL face database. Results show that this method is superior to the method of the traditional PCA.
Application and Analysis on Real-Time Protection for Educational Network Based on New UTM Technologies
Authors: Liu Hua Qun , Zheng Liang Bin
Published: November 2010

This paper firstly analyzed the complicated educational network security conditions, especially its’ real-time protection problems; then introduced principle of UTM (United Threat Management) ，and applied the new UTM technology ---Multi-Core UTM in a BIGC’s LAN, at last made a related analysis of this project.
Design of Measure and Control Comprehensive Test-Bed of Mixed Programming on VC++ with MATLAB
Authors: Zhang Li Xun , Wang Bing Bing , Liu Xiao Hong , Liu Bao Guo , Wang Yin Xue
Published: November 2010

There have been more and more types of electromechanical products which is detected and controlled with computer aided techniques, and also they have been more and more automatic. In order to learn and design a system to measure and control electromechanical products quickly, this paper developed a comprehensive test-bed to measure and control parameters. It combines VC++6.0 programming environment, MATLAB and PCL-818HG data acquisition card. This thesis introduced how to examine the displacement, rev, temperature, stress and the scheme of hardware composition to control the rev of engine. It also introduced the multi-threaded programming of VC++6.0 and the development methods of establishing link libraries between MATLAB and PCL-818HG. There were some applications as well.
Blind Digital Watermarking Algorithm Based on SVD Decomposition
Authors: Chen Hai Peng , Shen Xuan Jing , Wang You Wei
Published: November 2010

In order to balance the algorithm’s robustness and the watermark’s transparency better, a blind digital watermarking algorithm based on SVD decomposition was proposed. First, divided the original image into a number of 8*8 size blocks; then execute DCT transform on each block; next, execute SVD decomposition on each 2*2 size block of DC coefficients set with the purpose of get-ting the corresponding singular value matrix; finally, complete the watermark embedding by quali-fying the largest singular value using a step value Q based on the principle of parity quantification. The algorithm extracts DC coefficients as carriers of watermark image from the DCT coefficients domain, ensuring the robustness of this algorithm. Meanwhile, the transparency of the watermark image is increased by using the result of SVD transforms performs intrinsic properties of images ra-ther than the visual characteristics of images. Further more, this paper theoretically analyzes the in-fluence of the quantization step Q on the image quality, and selects the optimal Q value according to the result of the experiments. Experiments show that the algorithm can effectively resist JPEG compression, median filtering, noise and other conventional tampering operations, watermark can be extracted without the participation of the original image, achieving the blind detection of water-mark.
The Research of Intelligent Fault Diagnosis Model on Multi-Information Fusion
Authors: Liu Xiao Hua , Li Song Qing
Published: November 2010

From the intelligent fault diagnosis system requirements, this article analyzes the relationship between the fault diagnosis and the multi-information fusion basing on the summing up the multi-sensor information fusion technology, and studies the hierarchical structure of multi-sensor information fusion system and the content of integration, and establishes an intelligent fault diagnosis model with the multi-information fusion, which provides strong support for large-scale equipments, system monitoring and fault diagnosis in production process.
Improvement of a Self Proxy Signature Scheme
Authors: Xie Qi
Published: November 2010

The aim of self proxy is to protect the signer’s permanent secret key. In 2007, Kim and Chang proposed a self proxy signature scheme. In this paper, we show that their scheme cannot resist the warrant revision attack. Anyone can forge a valid proxy warrant and generate a valid self proxy signature for any message, when he gets a self proxy signature. To overcome their weakness, an improvement scheme is proposed, which is provably secure in random oracle model.
Open Problems for Privacy Preservation in Identity Management
Authors: Fu Zom Bo , Wang Jian Xin , Yang Lin , Cao Yuan , Zhu Wei Xing
Published: November 2010

In Open Computing Environments, more and more applications are deployed as service. They provide services for users from different organizations. Resources are deployed different organizations or enterprises. Users could access them across organizational boundaries. To ensure the security of resources, users have to provide their identity information to be authorized correctly every time they access a new service. It raises the risk of privacy which identity information was transferred frequently. In this paper, we demonstrate the problem of privacy in Identity Management of open computing environments, discuss the risk of privacy.
Case Retrieval Mechanism of the Intelligent RCM Analysis System
Authors: Cheng Zhong Hua , Wang Lu Chao , Lv Li Bo
Published: November 2010

To improve Reliability Centered Maintenance (RCM) analysis efficiency, the Artificial Intelligence (AI) technology, such as case-based reasoning (CBR) is successfully introduced into RCM analysis process and an intelligent RCM analysis (IRCMA) was studied, and an intelligent RCM analysis system (IRCMAS) was developed. The idea for IRCMAS is based on the fact that the historical records of RCM analysis on similar items can be referenced and used for the current RCM analysis of a new item. Case retrieval is the key part of the IRCMAS, of which mechanism has an importance effect on reasoning efficiency of system. In this paper, the IRCMAS is introduced, retrieval mechanism and process of cases are presented, and nearest neighbor retrieval method based on analytic hierarchy process (AHP) is in detail discussed by an example. Design of case retrieval mechanism lays steady foundation for development and realization of intelligent RCM analysis system.
MTTR Grouping Verification Based on Similarity
Authors: Gao Fu , Hao Jian Ping , Li Xing Xin
Published: November 2010

Traditional verification method is not suitable for complex equipment MTTR verify directly for they are more integrative and modularized. A method for group-verification is brought up which comprises sub-system of the complex equipment based on degree of similarity of MTTR curve. Determine similarity degrees of curves. Group by layers and priorities based on similarity, and then verify groups by traditional verification method. The method has been proven efficient in avoiding complex equipment MTTR verification problems and will give guidance in this area.
Modeling and Simulation for the Infrared Guidance System
Authors: Li Nan , Li Yan Jun , Zhang Yun Yan
Published: November 2010

The specific guidance simulation system for the infrared air-to-air missile is built. Seeker model including the target detection and tracking loop has simulated not only the different modes of field of view (FOV) according to the geometrical relationship between the target and missile, but also the jamming effect based on the equivalent target calculation; fuze model contains three different trigger mechanisms; guidance of missile is realized via three-dimensional proportional guidance law; the 6 DOF kinematics model and dynamic model of airframe are derived, through aerodynamic force and torque calculating, triple-channel autopilot model is set up by using the PID control method. Finally simulations under three different cases are implemented and the results show that the whole system is credible.
Design and Implementation of Small Satellite Flexible Test Bed
Authors: Zhu Zhi Lin
Published: November 2010

This paper analyzes the character and performance of the synthesized test bed on ground of small satellites. By studying several small satellite systems, the hardware and software architectures of flexible test bed are presented. The design ideas of the on-board part and the ground part of small satellite are given. The dynamic configuration for communication request/reply relation, the definition and resolution of the telemetry data signals are mainly discussed. The design and corresponding implementation are proven very effectively on the development of three small satellite systems.
Research on a New Model for Accelerated Life Test of Pneumatic Cylinders
Authors: Bai Chuan Dong , Wang Yan , Wang De Yi
Published: November 2010

Pneumatic cylinders, as a long lifetime product, are used continuously under normal conditions. So Accelerated Life Testing is an important tool to get information quickly on lifetime which is achieved by subjecting the test cylinders to conditions that are more severe than the normal ones. This paper firstly analyze the failure mechanism of pneumatic cylinder, then based on the General Log-Linear relationship and Weibull distribution, describes a model for multiple stress-type accelerated life data analysis. The paper gives the parameter statistical method of the mode by using likelihood theory. Based on the test data from ALT of pneumatic cylinders which adopt four test stresses including air temperature, motion frequency, working pressure and operation velocity, the parameter of the model are fitted. According to the test data and the estimated model, the paper extrapolates the pneumatic cylinder’s lifetime information under the normal user level.
The Effect of ENSO on Wheat Futures Based on EMD and GARCH Model
Authors: Lou Ying Jun , Lu Li Na , Zhu Li Jie
Published: November 2010

At present, most of the studies on the relationship between El Nino Southern Oscillation and agricultural futures focus on perceptual analyses and directly data analysis, and these discussions are usually limited to futures price. This article uses EMD algorithm to decompose Wheat futures prices and denoised ENSO index, and finally gets the negative relationship between El Nino Southern Oscillation and wheat Futures prices. Then, this article conducts the comparative analysis of operation performance based on El Niño Southern Oscillation, finding that this mode of operation can greatly increase yields, which further explains the practical significance of ENSO. In order to explore the impact of El Nino Southern Oscillation on wheat futures yields, use classic GARCH models, transform ENSO index into virtual variables, respectively introduce them into the mean value equation and conditional variance equation. After analysis, the conclusion shows that the impact is mainly on the volatility of return rate, which reminds traders of considering risk management first.
Study on Intelligent Fault Diagnosis of a Type of Ammunition’s Flight Control System Based on Fuzzy Theory
Authors: Xu Jing Qing , Qi Xing Lin , Ren Liang Liang , Cui Liang
Published: November 2010

Fault symptom of a type of ammunition’s flight control system shows fuzzy, and there is no intelligent fault diagnosis method for this control system fault diagnosis. This paper studies on intelligent fault diagnosis of terminally guide projectile based on fuzzy theory. The procedure of fuzzy fault diagnosis is shown. Combining with the practical situation of a type of ammunition’s flight control system and a large quantity of expert’ experience knowledge, the fuzzy diagnosis model is established. After given fuzzy diagnosis matrix, fault diagnosis of a type of ammunition’s flight control system was done as example. It practicability and credibility is shown by fault diagnosis result, and application of fuzzy theory in diagnosing the fault of a type of ammunition’s flight control system is proved valid. Two piece of proposal is proposed after analyzing the function parameter changing of this control system stored in storehouse longtime.
Research on Jamming Effect Evaluation Method of ISAR Using Moment Invariants
Authors: Lei Xue , Rui Cui , Jing Zhu
Published: November 2010

The Inverse Synthetic Aperture Radar (ISAR) is a high resolution imaging radar. Some methods used to evaluate the jamming effect of general radar are unsuitable to ISAR. Considering the principle of radar jamming and the theory of image disposal, the paper gives a new evaluation method of barrage jamming effect on ISAR, it evaluates the jamming effect through calculating the difference of two picture’s Moment Invariants, and this method can reflect distortion degree of the jammed target during the whole jamming process. The results of simulation prove the method is corrective and effective.
Determination of the Minimum Sampling Size for Performance Verification of Security Gate
Authors: Chen Juan , Song Chun Wen , Wu Wei
Published: November 2010

This Security Gate is thought to be of great importance to aviation safety. Verification need to be done to make sure of quality of security gate. In order to do verification well, specific sampling size need to be determined first. So how to select proper sampling size is supposed to be significant. According to central limit theorem this problem is solved in this paper.
A New Image Encryption Algorithm of Input-Output Feedback Based on Multi-Chaotic System
Authors: Mao Yong Yi , Deng Zi Chao
Published: November 2010

In this paper, a new method is proposed for image encryption by using Transformed Logistic map and Cat map. First, the Transformed logistic map is used to generating two coordinate sequences, and then the primary image's pixels shuffled by the two coordinate sequences. After shuffling, the key stream is produced by the Cat map to encrypt the shuffled image. Theoretical analysis and experimental results indicate that the proposed algorithm has a perfect encryption effect and can resist common attacks
Error Oblate
Authors: You Yang Sheng , Gao Yang Hua , Chen Yan Ying , Deng Xin Jie
Published: November 2010

Error Ellipse can’t correctly depict the distribution of random variables in non-normal distribution, so this paper presents the concept, theory and methods of Error Oblate. Error Oblate is the natural extension of Error Ellipse. It is widely applicable and carries great theoretical significance in data processing.
Formal Modeling of Automotive Software Requirements by Correctness
Authors: Liu Xiao Jian , Wang Zhi Xue , Yan Xu Qin , Li Yang , Li Jian Xin
Published: November 2010

Correctly modeling software requirements is one of the grand challenges of current ECU (Electronic control Unit) development. To ensure the correctness of the requirements, formal modeling techniques are usually used because they allow analyzers to simulate, verify and even conduct performance analysis in the requirement level. In this paper, we propose a requirements modeling framework, based on the philosophy of separation of concerns and the formal modeling techniques. The main contributions of this paper are two-fold: (1) We divide a complicated automotive software as several concerns, each of which is modeled by different formal techniques, thus the descriptive complexity of the requirements is decreased, and accordingly the models’ understandability is enhanced; (2) The adoption of formal techniques allows us to simulate the execution of the software and calculate the performance in the early stage of development, therefore the correctness of requirements can be improved.
Research and Application on Reverse Engineering of Tooth Surfaces of Hypoid Gear
Authors: Zhang Li Mei , Nie Li Xin
Published: November 2010

Reverse engineering, which is an approach for constructing a CAD model from a material solid through dimensional measurement and surface modeling, could be used to structure digitized tooth surfaces of hypoid gear. The reverse engineering of a NURBS tooth surface can be considered as specific number of curve's reverse solution, and the key is the structure of control equations and the selection of boundary conditions in each of reverse processes. According to NURBS theory, the coordinate, normal vector and various kinds of curvatures of all of points in the tooth surface can be solved. Thereupon, the engagement analysis of gear pairs can be achieved before manufacturing, and it is possible to amend manufacturing parameters in time so as to obtain tooth surfaces which meet the needs of function.
Wear Mechanism of Tool Head in Ultrasonic Polishing without Abrasives
Authors: Liu Chuan Shao , Li Yi Hui
Published: November 2010

Ultrasonic polishing without abrasives may enhance the fatigue strength, abrasion resistance and corrosion resistance of the part. The wear law and mechanism of tool head in the process of ultrasonic polishing without abrasives were analyzed according to the processing conditions and the specific experiments. The influences of processing parameters on wear rate of the tool head were studied. The experimental results showed that longer service life could be gotten in the ultrasonic polishing without abrasives than conventional extrusion process, and the wear rate of the tool head increased with the increment of the preload, rotating speed of the spindle and the feed rate of the work piece.
Simulation and Analysis of Cutting Tools Corner Radius in Cutting Process
Authors: Dong Zhao Wei , Wan Xiao Hang , Liu Sheng Yong
Published: November 2010

In the procedure of cutting, its corner radius influences cutting forces, chip breaking, chip shaping, and the distribution status of residual stress. The author adopts the Finite Element Method (FEM) in this paper, and establishes the reasonable two-dimension milling model based on the orthogonal cutting process, which is used the adaptive meshing criteria. And, a typical work-piece chip breaking process with different cutting tools corner radius, which gets the cutting forces curves and the total status of residual stress distribution and the status is simulated in this paper.
Experimental Study on the Subsurface Damage in the Ultrasonic Vibration Grinding of Nano-ZrO2 Ceramics
Authors: Zhao Ming Li , Zhao Bo , Wang Yu Qing , Kong Ling Zhi
Published: November 2010

Because of the hard-brittle character of ceramics, the ultrasonic vibration grinding method was used in the experiment. And the effects of ultrasonic vibration on the subsurface damage were analyzed in this paper. The experiment indicates that the frequency of 35 KHz will be more suitable for ultrasonic grinding ceramics, and under this frequency the damage layer thickness will be controlled in 11μm. The effect of vibration amplitude on the subsurface damage was also analyzed in this paper. The experiment results show that smaller amplitude will impair the efficiency of ultrasonic vibration grinding. The ultrasonic vibration mode was also an effect factor to the subsurface damage. Only the longitudinal vibration mode can improve the subsurface quality, while the bending vibration and torsion vibration will lead to the contrary results.
Developing History and Trend of Mine Support Equipment in China
Authors: Xue Tong Long , Zhang Xiao Hui , Du De Tai
Published: November 2010

The development of mine support equipments, which has a long history, is accompanied with the development of the coal mining industry. From its developing process, it can been seen that the developing trend of mine support equipments is from primordial to hi-tech type with characteristics of high efficiency, high speed, complete set. The developing history from the primary stage to the advanced stage has been introduced in this paper, and the further direction of the mine support equipments in China is also indicated.
Research of Fault Warning System of the Cooling Tower Fan Blade
Authors: Chen Jian Ping , Dong Wei
Published: November 2010

A new monitoring method is described on the basis of the technology of the cooling tower fan monitoring and failure diagnosis, the warning system uses microprogrammed control unit real-time monitoring the blade. A magnet was fixed on the tip of every blade and these magnets were uniformly distributed in the same plane. A Hall proximity switch was fixed on the air duct which was at the same plane with the magenet, and the Hall proximity switch was used as a signal acquisition sensor, and the pulse signal of the Hall proximity swith was collected through microprogrammed control unit. Using the timing and interrupt function of microprogrammed control unit, the pulse signal was analysed and processed, when the blade breaks down and deforms, the preprogramme shut down the fan and outputted a forecast alarm, so the blade accident would be prevented. It is proved that running state of the system is good by production and practice and the monitoring method can greatly improve the reliability of the fault monitoring and warning. The monitoring system has a wide application.
Identification of Fractal Scale Parameter of Machined Surface Profile
Authors: Li Ding Shi , Zhang Yi Du , Wu Qiong , Wang Peng
Published: November 2010

In order to identify fractal scale parameters of machined surface profile accurately, the precisions of different parameter identification methods, such as power spectrum method, structure function method and variance method, are analyzed and compared. Based on discrete power spectrum function and variance method, a revised method of scale parameter identification is advanced. Results show that, in contrast with other methods, the new method could identify more accurate parameter. Those methods are adopted to identify parameters of machined surface profile. The variation of fractal parameters with surface roughness is studied. Research indicated that the preferred method to identify fractal scale parameter is the revised method; otherwise, significant error may occur in the results of parameter identification.
Patran Based Results Processing System for Spacecraft Mechanical Analysis
Authors: Wang Bin , Wang Chun Jie , Wu Hong Chun
Published: November 2010

Regarding the basic method and process of current spacecraft structural mechanics analysis, the paper used the secondary development language of Patran (PCL) to automatically extract the finite element model information such as mass property, material property, element property etc; According to the mission of spacecraft mechanical analysis, the obtained results were re-solved to get the required information. Executable program was written in Java to transform the extracted results into specific forms in accordance with the predetermined templates. Finally, using the forms and menu libraries provided by PCL language, graphical interfaces were created to integrate all the functions and procedures in to Patran so that the whole process could be accomplished through an intuitive graphical interface, which was user-friendly. Adoption of the result processing system on specific examples verified the feasibility of the system.
Development and Application of CAD/CAE Technology in China Coal Mine Machinery Equipment
Authors: Guo Pei Hong , Zhu Jian An
Published: November 2010

This paper briefly reviews the development and application process of the CAD/CAE technology in China coal mine machinery equipment, it is the process of from 2-D drafting to 3-D modeling, from Down-Top the building blocks design to Top-Down the really design process, from the geometry structure to comprehensive properties design; Then it introduces the CAD/CAE application status in the three aspects of interactive conventional design, secondary development professional software and virtual prototyping technology; And it also analyzes the development and application trend in constructing the based project database, building the development platform for dedicated equipments design, and using the collaborative design CAD system
The Design of Compact Five-Coordinate Measuring Machine
Authors: Fei Zhi Gen , Guo Jun Jie , Luo Guo Fu
Published: November 2010

In this paper, a novel type compact five-coordinate measuring machine with laser probe, which contains three translational axes and two rotational axes, was designed and built. The overall mechanical structure and several key components are introduced in detail. The structure form of column and cantilever beam is adopted, which enhances the measuring flexibility and make the probe feasible to detect the objects from various directions. With the help of results of finite element analysis on the beam, the method of pre-deformation assembly is employed to guarantee the location accuracy of the probe. Using a standard ball, the calibrating results show that the uncertainty of this machine is within 2.2
Research on Forms of Grinding Allowance Based on NC Form Grinding Cylinder Gear
Authors: He Hong Xia
Published: November 2010

The machining principle and characteristics of form grinding cylinder gear are introduced as well as the characteristics of form grinding machine in this paper. By analyzing and comparing three kinds of grinding allowance for cylinder gear grinding, a reasonable and effective axial section shape is determined in experience, which is a practical profile to shape the axial section of grinding wheel for numerical control grinding cylinder gears.
Design and Development on the Processing and Managing System of Spaceflight Products Analysis and Experimental Data
Authors: Liu Yi Tao , Wang Chun Jie , Wang Bin
Published: November 2010

Based on analysis of problems in spaceflight products R&D data process and management, a solution is proposed in this paper. An analysis and experimental data processing and managing system is realized in a WEB environment based on B/S frame. This paper has also introduced the composition and principle of the system.
Investigation on the Motion States of the Hammers while Hammer Mill Steady Running by High-Speed Photography
Authors: Liu Bao , Zhang Dong Xing , Zong Li
Published: November 2010

Actual motion states of the hammers while hammer mill steady running is an important analysis basis for the dynamic characteristics of the hammer mill rotor and the wear mechanism between hammers and hammer pivots. To investigation the actual motion states of hammers, a high-speed photography was used in this paper to record the instantaneous states of the hammers. And comparison analysis on the pictures recorded at three different working speeds was made, the results showed that, for each hammer on the hammer mill, there exists random static deflection phenomenon; and for all hammers, there exist chaos phenomena with relative rest positions in range of a certain angle.
Data Communication Methods for the Fault Diagnosis Instrument System
Authors: Zhang Deng Pan , Zhu Hong Li , Shi Yong Gang
Published: November 2010

The data communication plays a very important role in fault diagnosis instrument system. In this paper, a flexible software bus method is proposed which is designed for the communication among instrument components. In this way, the data processing modules can be prefabricated together dynamically and in parallel. To carry out the communication between the bus and components, the design principle and the architecture of the components is discussed, and then the fault diagnosis instrument cases can be constructed by configuring the instrument components with the communication addresses. Based on the software bus, the processed data of fault diagnosis can propagate among the configured data flow ways asynchronously, and users can plug and unplug any components to the instrument platform. The application cases shows that the proposed way can accelerate data exchange among the modules based on the components and improve the working processes efficiency.
Research of Automatic Camshaft Detection and Data Processing Technology
Authors: Zhong Li Juan , Tong Jing Lin
Published: November 2010

The traditional optical-mechanical measurement instrument as well as manual data processing methods has unable to meet the efficient and accurate detection requirements for camshaft. In this article, the principle of automatic camshaft detection technology and the control system’s structure are introduced. The data acquisition system independent of movement controller and the data processing method of "all the sensitive" and evaluation method are introduced sequent.
The Transformer Simulation and Performance Testing in Ultrasonic Vibration Assisted Grinding System
Authors: Yao Jian Guo , Zhao Bo , Jia Zhen Feng
Published: November 2010

According the designing theory of transformer, it could be designed by big end diameter, magnification, area index and other parameters. then theoretical resonance length, small end diameter, displacement node, magnification factor, shape factor and other parameters of the transformer could be determined. This model can be built by ANSYS and vibration performance of transformer can be judged by numerical analysis. Finally, the performance of the transformer vibration would be tested and analyzed.
Research on Crack Mechanism of Surface/Subsurface Based on Grinding Stress Field in Ultrasonic Grinding Nano-Ceramics
Authors: Zhao Chong Yang , Li Xiang Dong , Jiao Feng
Published: November 2010

The crack nucleation and propagation process in ultrasonic grinding engineering ceramics are studied based on indentation fracture mechanics. The study shows ultrasonic grinding can be considered as continuous loading and unloading process in view of a single grain. The loading makes cracks form and preliminarily propagate; while the unloading makes them propagate further and makes the direction of crack propagation offset to the workpiece surface, not so far as to extend to the material interior. In common grinding cracks have extended to the material interior, resulting in deep subsurface crack in the subsurface layers. In this paper, the ground surface of small crack damage can be obtained with large grinding depth in ultrasonic grinding compared with common grinding under the same conditions.
Optimization Design of Coordinate Measuring Machine Based on ANSYS Software
Authors: Yan Yong Gang , Li Yan Qin , Wang Zhan Kui
Published: November 2010

Coordinate measuring machine (CMM) is a large-scale geometrical detecting instrument. It is of high accuracy, high efficiency simple operation and automation. So, it can ensure the product quality for modern mechanical manufacture industry, and is widely used in the industry such as aircraft, automobile, military and national defense. However, it does not meet gradually the requirement of modern industry because of its measuring accuracy. How to monitor geometrical error rapidly and high accurately is a key research project. To solve the problem, some studies have been carried out. In this paper, a coordinate measuring machine was firstly designed by modern design method. Three dimensional model is built using PRO/E software. And some key components were optimized by using finite element analysis method. The simulating results show that the size and structure of the designed coordinate measuring machines are optimized and improved relate to previous CMM. This study will play an important instructing role for us in studying a novel CMM.
Experimental Study and Finite Element Analysis of the Performance of Reciprocating Seal in Rapping Device of Gasifier
Authors: Yu Jiu Yang , Gao Jiu Yang , Lin Wei , Wang Cheng Gang , Wu Yan Yang , Xu Jian Min
Published: November 2010

The performance of reciprocating seals in rapping device of gasifier was studied through finite element method. The contact stress, Von-Mises stress, and friction power loss of O-ring and Sliding-ring combined Seal-ring were obtained. Meanwhile, the experimental study in performance of seal structures of rapping device were carried out. The results show that both of the seal structures are satisfied seal requirement, but compared with the Sliding-ring combined Seal-ring, the O-ring is easier to be destroyed and power loss of O-ring is higher than Sliding-ring combined Seal-ring. The results also verify the superiority of Sliding-ring combined Seal-ring in rapping device of gasifier.
Fault Diagnosis of Emulsion Pump Valve
Authors: Han Xiao Ming
Published: November 2010

The abruption of the valve spring will deteriorate the opening and closing hysteresis characteristic and reduce the volumetric efficiency of the emulsion pump further. With the singularity detection and the improved algorithm of the Lipschitz exponents based on least median of squares, the singularities in signals could be localized to find the impact hour between the discharge valve disc and the valve seat or the lift limiter. The diagnosis results show that the discharge valve spring abruption fault of the emulsion pump can be identified correctly and effectively.
Research and Application of Subsidiary Transport in Mines Based on Flexible Surge Bin Design
Authors: Wan Li Rong , Wang Zai Chang
Published: November 2010

The concept of flexibly connected surge bin transport system was given in this paper. On this basis, the reliability of subsidiary transport system in mines has been researched, and the main factors that affect the system’s reliability were given. After the flexible surge bin was applied, Xin Wen Mining Bureau successfully carried out new subsidiary transport methods, for example: storing the coal and waste rock in different places and transporting them at different time with different ways, and disposing the waste rock timely at the large cross-section all-rock driving face, etc. The achievements in Xin Wen Mining Bureau prove that the flexible surge bin can remarkably improve the reliability of subsidiary transport system, so the application of the flexible surge bin really has a promising prospect.
Research on 3C Integrated System of CBN Turning Tool for Small and Medium-Sized Enterprises
Authors: Liu Nan Bo , Wu Zhao Yun , Li Gang Yan , Hu Shu Long , Yang Cheng Lin
Published: November 2010

In view of the problems and difficulties in the information system integration of the small and medium-sized super-hard cutting tools enterprises, the characteristics of the design and manufacture of the CBN turning tool were analyzed. The demand of the enterprises for the 3C integrated system of CBN turning tool was presented. The 3-layer architecture of the 3C integrated system of CBN turning tool was proposed, which included the data layer, the application layer and the user layer. The object-oriented method was adopted to design the system and the class model of the system was constructed. Based on these, the 3C integrated system of CBN turning tool for small and medium-sized enterprises was developed. The key technologies of the system were put forward. The system had been applied to the enterprise and run well.
Research of Rolling Mill Friction Quivering Properties Based on the Rolling Interface
Authors: Fan Xiao Bin , Wang Hui Gang , Zang Yong
Published: November 2010

In order to find the vibration source of a rolling mill, the dynamical characteristic of friction of the rolling interface was analyzed. Characteristic between friction coefficient and rolling speed has been gotten based on test. It is shown the friction or friction coefficient of rolling interface declined sharply with the rolling speed variety in some time. By the comparison test on the spot, it is shown that closing emulsion is conducive to vibration suppression. A lateral friction roller flutter model was established. According to the model numerical analysis, it is shown that when the external disturbance forces being smaller the system showed an almost periodic motion, while a chaotic ones when the external disturbance forces being bigger. Moreover, with the change in external disturbance force roll amplitude bifurcation was occurred. That is to say, reducing the rate and frequency of exciting force will improve the stability of the system dynamics.
Research on Decision of ANP-Based Enterprise Software Outsourcing Alliance
Authors: Wang Xia , Sun Shi Lei
Published: November 2010

With outsourcing and the software market competition intensifies, software alliance and outsourcing of the organization for the enterprise, scientific, reasonable assessment software alliance ability outsourcing decision to build a key factor is the prerequisite for business to obtain continuous competition advantages of decision-making. to provide the basis of the resources of studies on the basis of ability, the enterprise, from the background, the core, trust control mechanism and coalition partners four an alliance decision-making body of appraisal target.(ANP) constructs ability software outsourcing alliance decision model based on the indicator system using the analytic hierarchy process, and unifies the example utilization super decision-making (Super Dicisions, called SD) the software confirmation model.
Frequency Dependence of the Internal Friction for Ti50Ni48.5Fe1.5 Shape Memory Alloy
Authors: Xing Ting Yong , Mi Xu Jun , Yin Xiang Qian , Gao Bao Dong , Li Yan Feng
Published: November 2010

The objective of this work is to investigate the influence of measuring frequency on the internal friction of Ti50Ni48.5Fe1.5 shape memory alloy. The DSC, DC electrical resistivity and internal friction measurements were employed to characterize the sample in this study. Comparing the DSC result, the two internal friction peaks were confirmed which are corresponding to the R-phase transformation and martensitic transformation of Ti50Ni48.5Fe1.5 alloy during the cooling process, respectively. The height of internal friction peak corresponding to martensitic transformation increased with decreasing of measuring frequency. But, the height of the internal friction peak corresponding to R-phase transformation exhibited little measuring frequency dependence. Meanwhile, the value of the relative modulus peaks of the specimen increased with measuring frequency increasing. Furthermore, there was an interesting phenomenon that the martensitic transformation finish temperature shifted to higher temperature side with increasing of measuring frequency. It could be associated with the variation of applied vibration energy.