bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Performance Test System of Seals in Hydraulic Support Column
Authors: Zhang Xi , Zhao Ping , Bai Yu
Published: February 2012

In order to solve the problem that there is no appropriate testing method for the purchasing process of sealing washer in hydraulic support producing company at present, the author designed a test bed used to test the seal performance of hydraulic cylinder in the mine hydraulic support to provide database supports for purchasing sealing washer for hydraulic support manufacturers, by using the performance testing system of sealing washer worked upright column for hydraulic support. The introduction of the principles, constitutions and functions of the test bed will be shown in this paper. After a number of experiments, it is reflected by the practical applications that the test bed is operating stably, accurately and efficiently which could be used for testing sealing washer.
Particle Swarm Improvement Optimization Algorithm and Performance Study
Authors: Ji Wei Dong , Wang Ke Qi
Published: February 2012

In this paper, the PSO algorithm is improved, and take mutate of idea into PSO, namely algorithm not set particle boundaries constraints to make them limited in the search interval, but produce the same number of random particle replace those particles of flying away from the search area. Put forward a kind of improved particle swarm optimization algorithm. Use three input XOR problem to improve algorithm testing, the results show that the improved algorithm in the convergence speed and global search ability is superior to the PSO and SGA algorithm, and avoid the prematurity and local convergence.
The Track Motion Control of the Flying Shear Based on Quintic Spline Curve
Authors: Zhang De Li , Zhou Lai Shui
Published: February 2012

If the acceleration and deceleration of the flying shear track motion is constant, the acceleration and jerk of the tracking algorithm are not continuous, these result in a mutation of the force on moving parts and a great impact on the abrasion and service life of the equipment. Moreover, these affect the following effect of the servo system, make the cutting precision decreased. To improve the shear precision and cross section quality, an algorithm of the synchronous motion tracking of the flying shear is proposed. This algorithm directly uses the quintic spline curve profile to track the strip feed without any cam profile table. The quintic spline curve trajectory of the flying shear can make the velocity and acceleration of the blade rotation movement smooth. According to the length that user inputs, the control system uses iteration method to calculate the initial waiting length of the feed to carry out long cutting or short cutting automatically. Nonlinear synchronous movement is carried out to synchronize the horizontal speed of the flying shear with the feed speed of the strip on the cutting zone, which ensures the high-precision cutting length and smooth cutting cross section.
Study on CNC Machining Method of EDM Copper Electrode
Authors: Guo Zhong
Published: February 2012

The structural feature of EDM copper electrode is analyzed in this paper from the aspect of machining process, and the NC machining process is studied. The CNC machining method of EDM copper electrode is described briefly; the problem that frequently occurs in the machining that the copper electrode is deformed is solved, and the machining criterion of EDM copper electrode is discussed as well.
Research on Reuse-Oriented Intellectual Development Method for CNC Human-Machine Interface
Authors: Zhai Zhen Kun , Li Di , Li Song , Zhang Chun Hua
Published: February 2012

To improve the productivity of HMI development, this paper proposes an intelligent development method for human-machine interface of CNC according to software reuse theory, of which the core technology consists of configurable intelligent development framework for HMI and functional component library. For the development framework, it includes customized interface editing environment, middle-layer model and automatic code generation engine. As to the design of functional component library, component object model (COM) is used to create various components which can be classified into graphic primitive components, CNC system function components, interpreter components and so on. By use of the component interface, development framework communicates with the above mentioned component and is responsible for the assembly and integration of components through which the complex HMI system is automatically generated. Based on the intelligent method, developers can realize the automatic development of human-machine interface, which will ensure product quality and improve the development efficiency.
Build Structure of Fractal Interorganizational Information Systems and Optimize Supply Chain Structure
Authors: Zhuang Wei Qing , Liu Zhen Yu
Published: February 2012

This paper uses fractal theory to analyze interorganizational information systems (IOS). Firstly, IOS’s structure has fractal characteristics of self-similarity, self-optimization and self-organization, consequently, gives the concept and definition of fractal interorganizational information systems (FIOS). Thirdly, builds IOS topological structure fits actual needs based on Diffused-Limited Aggregation (DLA) model to optimize the growth rule of IOS, then, designs six topological structures of FIOS and estimates approximatively their fractal dimension values. Finally, gives fractal interorganizational information systems application to optimize the supply chain network structure to improve operation efficiency.
The Diversities and Unities of Thermodynamic Function Expressions for Simple Systems
Authors: Zhao Shi Hua
Published: February 2012

For the thermodynamic functions of simple systems, the expressions of different state parameters are proposed, and the equivalence relations between the different expressions are validated, which shows the diversities and unities of the thermodynamic function expressions. A memory approach of the Maxwell equations are also introduced, which is quicker and more accurate to write out the Maxwell equations, than to use any auxiliary figures.
Seismic Studies for Gas Hydrate Characterization in a Marine Case
Authors: Tang Zhi Yuan , Sun Zan Dong , Zhang Yuan Yin
Published: February 2012

We combine an integrated study of gas hydrate reservoirs in a marine area from seismic data which collected for oil and gas exploration purpose. This study combines analyses of geology and seismology. First, geological analysis is made using data of material sources, structures and sediments to determine the hydrocarbon formation conditions of gas hydrate. Then seismic amplitude attributes analysis is conducted to predict the potential existence of four types of BSR in this area. Finally, pre-stacked inversion is conducted to predict the potential existence of hydrate and its free gas. Results show that gas hydrate is widely distribute in this area, and the distribution controlled by material source, reservoir space, and geothermal conditions.
Reactive Divided Wall Distillation Column: Simulation and Experiment of Methyl Acetate Hydrolysis
Authors: Wang Yan , Ma He Xu , Zhu Huai Gong , Tang Wei
Published: February 2012

As a combination of divided wall column (DWC) and reactive-distillation column, the reactive divided wall distillation column is a highly complex technology that reaction and separation can occur simultaneously, which can reduce the energy consumption and decrease the costs of captial and operation. This new process was simulated with PROⅡ software and mini plant experiments were implemented. In addition, we investigated the influences of reflux ratio, liquid distribution ratio and molar ratio of ester in water on the conversion rate of methyl acetate and the purity of the product respectively. It could be seen that the trend from experiments was suitable with simulation results.
Research of Response Characteristics of Elastic Wave Field in Two-Phase Media of Coal Rock
Authors: Yu Tian , Yu Shi Jian , Ren Jia Guo , Ma Yang Min , Li Jia Jia
Published: February 2012

In order to study the characteristics of elastic wave field of the two-phase media of coal rock, a model of stratified two-phase media containing coal rock was proposed. A zero phase wavelet of higher resolution selected, a forward simulation of elastic wave field was performed on the model using MATLAB programming language. Simulation results show that the vibration amplitude of the elastic wave field, when propagating in homogeneous stratified coal rock media, vary with the variation of porosity, which indicates that it is feasible to utilize the elastic wave approach to detect the porosity of two-phase media of coal rock and has a certain significance in exploring the structural feature and pore property of underground water-contained coal rock.
Research and Implementation of Virtual Assembly Motion Guided by Assembly Force
Authors: Yin Lei , Shao Xiao Dong , Li Ke
Published: February 2012

The definition of assembly force is defined in this paper. The assembly force is classified according to the different states of assembly parts. The draft-hole assembly is presented as an example to analyze how the assembly force effects the process of virtual assembly. A kind of virtual assembly motion method guided by assembly force is proposed to simulate the real assembly process. A prototype system based on assembly force is presented.
Design and Characterization of Single Beam for Latching Electrothermal Microswitch
Authors: Zhang Ying , Wang Hong , Wang Yan , Mao Sheng Ping , Ding Gui Fu
Published: February 2012

This paper presents the design, fabrication and characterization of single beam for latching electrothermal microswitch. This microswitch consists of two cantilever beams using bimorph electrothermal actuator with mechanical latching for performing low power bistable relay applications. A stable state can be acquired without continuous power which is only needed to switch between two stable states of the microactuator. The single beam is discussed mainly to judge the possibility of realizing the designed function. First, reasonable shape of the resistance is designed using finite element analysis software ANSYS. Then, mechanical performance was characterized by WYKO NT1100 optical profiling system, the tip deflection of single beam can meet the designed demand.
Removal of Some Heavy Metals by Electrocoagulation
Authors: Al Anbari R. H. , Alfatlawi S. M. , Albaidhani J. H.
Published: February 2012

Heavy metal removal by electrocoagulation using iron electrodes material was investigated in this paper. Several working parameters, such as pH, current density and heavy metal ions concentration were studied in an attempt to achieve a higher removal capacity. A simple and efficient treatment process for removal of heavy metals is essentially necessary. The performance of continuous flow electrocoagulation system, with reactor consists of a ladder series of twelve electrolytic cells, each cell containing stainless steel cathode and iron anode. The treatment of synthetic solutions containing Zn 2+,Cu 2+,Ni 2+,Cr 3+,Cd 2+ and Co 2+ ,has been investigated. Results showed that iron is very effective as sacrificial electrode material for heavy metals removal efficiency and cost points. Also it was concluded that the chromium has lower efficient removal as compared to zinc, copper and nickel. At the same time cadmium and cobalt have minimum removal efficiency.
Research of SCARA Robot Based on Fuzzy_PID Hybrid Control
Authors: Tang Yao Wu , Yu Jing
Published: February 2012

This article put forward a kind of PID compound control algorithm, the arithmetic is the integration of fuzzy control technique and PID control technique, it possesses both the flexible and strong robust advantage of fuzzy control and the precise character of PID control. A simulation study of the system shows that the algorithm is of reliability, high precision and strong ability of anti-interfere and robustness.
Pupil Detection in Facial Images with Using Bag of Pixels
Authors: Azimi Sotudeh Mohammad Ali , Ziafat Hasan , Ghafari Said
Published: February 2012

To detect and track eye images, distinctive features of user eye are used. Generally, an eye-tracking and detection system can be divided into four steps: Face detection, eye region detection, pupil detection and eye tracking. To find the position of pupil, first, face region must be separated from the rest of the image using bag of pixels, this will cause the images background to be non effective in our next steps. We used from horizontal projection, to separate a region containing eyes and eyebrow. This will result in decreasing the computational complexity and ignoring some factors such as bread. Finally, in proposed method points with the highest values of are selected as the eye candidate's. The eye region is well detected among these points. Color entropy in the eye region is used to eliminate the irrelevant candidates. With a pixel of the iris or pupil can be achieved center of pupil. To find the center of pupil can be used line intersection method in the next step, we perform eye tracking. The proposed method achieve a correct eye detection rate of 97.3% on testing set that gathered from different images of face data. Moreover, in the case of glasses the performance is still acceptable.
A Fast Forward Kinematics Algorithm for 3-PRS Parallel Mechanism
Authors: Li Tian Yu , Zhao Ding Xuan , Han Fang Yuan , Shi Zhong Ke , Wang Meng , Huang Guo Ping
Published: February 2012

Parasitic motion of 3-PRS (prismatic-revolute–spherical) parallel mechanism is discussed, inverse kinematics model of this mechanism is established. Based on the structure feature of 3-PRS parallel mechanism, a new forward kinematics algorithm for this mechanism is presented. The algorithm consists of approximate calculation and iterative calculation. The mathematical model of the proposed algorithm is clear simple, no derivative operation or Jacobi matrix inverse operation is needed, so computation is less. The experiment shows that in the same computing environment, the calculation speed of the proposed algorithm is about 2 times of the existing algorithms to achieve the same accuracy, so it can be applied to real-time control. Complexity and workload of programming is less than half of before. The algorithm is based on 3-PRS parallel mechanism, but it is also applicable for other parallel mechanism.
Research on High Precision Time Information Transmission Method
Authors: Zhou Guo Ping , Zhang Ji Cheng
Published: February 2012

Time synchronization system has been widely used in power system. According to the needs of different system, it provides different signals. Usually you can use a GPS clock pulse, serial message, IRIG-B yards and so on. B code contains both plus and serial time message .And the traditional equipment is often used pulse and serial message at the same time. We put forward a method to transmit pulse information and serial message information on a transmission line .And at receiving place, it can restore the signals. It can reduce line costs and outside interferences, is beneficial to the optimization of system.
Research on Forecasting the Research Costs of Applying Cost-Time Cumulative Curve to the Military Container Roll In/Out Platform
Authors: Li Qin Zhen , Xu Hong Tao , Zhai Jun Wei , Wang Qiang
Published: February 2012

On the basis of fully explained the necessary of bringing the Cost–time cumulative curve into estimating costs of the military container roll in/out platform, the paper demonstrates the procedures and method on building the model of Cost–time cumulative curve. And aimed at a certain military container roll in/out platform, the feasibility of these methods is verified by testing instance and experiment.
Study and Selection of Working Fluids for Organic Rankine Cycle (ORC) Using Engine Waste Heat Energy
Authors: Yang Kai , Zhang Jian , Zhang Hong Guang , Chen Yan , Liu Bin , Wu Yu Ting , Wang Wei
Published: February 2012

In this paper, a basic ORC system is proposed to recover the exhaust gas energy of vehicle engines, and the mathematical model of the ORC system is built. Thirteen working fluids are analyzed. The main criterion for selecting working fluids is the mass flow rate and the heat absorption rate under the same power output of single-screw expander. Then, the paper presents an analysis of the irreversibility rate and thermal efficiency of the ORC system using 4 different organic working fluids.
Study on Ultrasonic P-Scan Imaging Technology for Rotary Parts Used in Coal Mine Machinery
Authors: Dong Ming , Ma Hong Wei , Chen Yuan
Published: February 2012

Aiming at implementing numeralization, automatization and imaging of ultrasonic testing in rotary parts used in coal mine machinery, ultrasonic P-scan imaging technology of rotary parts is studied in this paper. Searching pixel units according to the incident direction of ultrasonic, and correcting non-isotropic resolution images to isotropic ones with linear interpolation algorithm to, multi-layer B-/C-/D-scan and 3-D projection view imaging are achieved. Experimental results show P-scan image could accurately reflect the localization, quantification and orientation of flaws.
An Approach to Anatomic Contour Extraction of Vertebra CT Image Combining Contourlet Transform and PCNN
Authors: Deng Jun Min , Li Hai Yun , Wu Hao
Published: February 2012

Methods：In this paper, a new anatomic contour extraction algorithm based on the contourlet transform and pulse-coupled neural network ( PCNN ) was presented. The contourlet transform is applied on the vertebra CT image firstly, using its multiscale and multidirectional characteristics to get the coefficients which can effectively capture the contours of an image and depict the contours sparsely. Then PCNN is utilized to extract contours from the contourlet approximation image. Finally, the contours of image are reconstructed by inverse contourlet transform.Results：The proposed algorithm is tested on vertebra CT images, and we get some encouraging results, which are better than those based on wavelet. Conclusions：In this paper, we extract the contours of vertebra correctly, which effectively represent multiscale and multidirectional singularities of an image. This proposed method is very significant for the clinical applications and medical researches.
Analysis and Improvement of ZigBee Wireless Networks Route
Authors: Tian Qian Qian , Wang Jin Hai
Published: February 2012

ZigBee is an emerging shortrange wireless network technology which based on IEEE802.15.4,but increase in nodes and forwarding data packets significantly reduces the network life cycle.First analysis the two basic routing algorithms in details,then two advanced algorithms resulting from node energy are proposed.The simulation of performance using NS2 indicates that in the same condition the improved routing algorithms can reduce the death of nodes and prolong the network life cycle.
An Innovative Design for High Performance Control Valve by Using the Synergy of QFD and TRIZ Methods
Authors: Hu Chang Ming , Yeh Chi Hao , Huang Jay C.Y.
Published: February 2012

This research proposes QFD and TRIZ integration at stages of the main problems that may arise, creating the high performance control valve in the concept development and manufacturing stages to amend and prevent the main issues in the front-end. In order to eliminate the conflicting requirements to build the prevention front-end design of the design process that will meet customer needs and translate customer needs into measurable technical requirements, the innovative design model integrating two tools were proposed, which based on the consideration of the correlation matrix of engineering characteristics and customer satisfaction on the basis of cost and time. Finally, one example of the method described will be highlighted within the research that will demonstrate the design of the case and achievable resource benefits. They can also provide the design staff with more effective ways to accelerate the product design and manufacturing process.
Comparative Investigations on Measurement Technologies of Metal Surface Residual Stress
Authors: Yu Fu Jin , Wang Lin Lin
Published: February 2012

In this paper, the surface residual stress of spheroidal graphite cast iron was measured by using critically refracted longitudinal (LCR) ultrasonic wave, X-ray diffraction (XRD) and blind-hole measurement methods. The test specimens used in this study were cut from a practical forging roller made from spheroidal graphite cast iron. The measurement results were compared and analyzed. They indicated that the measurement results obtained by this LCR method were consistent with those of the other two methods, which verified that for spheroidal graphite cast iron material, LCR method was an applicable, effective and reliable test technology of surface residual stress measurement.
Designing an Embedded Motion Controller Using a 16-Bit Microprocessor Motion Chip and ARM
Authors: Chi Shi Chun , Zhao Ming Yang
Published: February 2012

This paper describes the design and implementation of a high efficiency motion controller system consisting of host machine and teach pendant. The host machine performs some of the position control processing tasks and receives the processed data from Teach Pendant. Starting with introduction to existing excellent 4-axismotion controller PCL6045B, It describes the overall structure of the system and the hardware that make up the motion controller. Then, this paper discusses the design method of software system, and the motion control chip PCL6045B driver in WindowsCE. Besides, the flow diagram of the use of industrial communication networks transmission about CC_LINK is showed in detail. After testing the system, it has implemented the high precision position controller. Moreover, it has the advantages of low cost, easy use.
Design and Analysis of Cards-Flipping Algorithm
Authors: Zhao Ning , Bao Xue , Wang Yu
Published: February 2012

This paper discusses a new algorithm solving zero-one integer linear programming models. Based on the analysis of different commonly used algorithms, we put forward a new algorithm named cards-flipping algorithm which demonstrate reliability and accuracy equivalent to enumeration methods. The correctness and practicability of the method are verified with mathematical proofs and a great deal of examples.
Application of Disaster Recovery Technology in Power Grid Dispatching Automation System
Authors: Wang Guang Hua , Zheng Hui
Published: February 2012

With the increasing expansion and complexity of the power system structure, the operational reliability of the power grid dispatching automation system has become increasingly demanding. The data’s rapid growth and requirements of high availability and security stimulate the development of the disaster recovery technology which has become a key factor of IT infrastructure. This article describes the disaster recovery technology in details from the measure index and level classification of disaster recovery, and analyzes its implementation process and importance by taking the disaster recovery in the power grid dispatching automation system as an example.
A Novel Design of SOC Prediction for an Electrical Vehicle Based on the Intelligent Algorithm
Authors: Qiu Hao , Lei Zheng Bao , Qi Tom Zi Ming
Published: February 2012

This paper is to present a novel design to predict the State of charge (SOC) of the batteries for the Electric Vehicles (EV) using a voltage descent model which has been built based on the analysis of adaptive fuzzy neural intelligent algorithm (AFNIA) and the charge/discharge experimental data of Electric Vehicle. In this design, an improved BP neural network has also been proposed to indicate the correlation between open circuit voltage and SOC. An experiment employed a Lateral Moving and In Situ Steering EV built by Shenzhen Polytechnic. The test and simulation results showed that the intelligent methods can accurately predict the SOC of lithium batteries. The combination of fuzzy control and neural network can achieve an effective way of predicting the SOC of batteries.
Automated Pedestrian Detection and Recognition Applied to Automatic Gate Machines in Urban Rail Transit
Authors: Zhang Dong Quan
Published: February 2012

This paper presents a novel pedestrian detection and recognition method based on a new photoelectric sensor layout for increasing the recognition rate and the recognition speed of the Automatic Gate Machine (AGM). First of all, a new sensors layout is designed. Next, by collecting the time and sequence of pedestrian breaking the rays of the sensors, an algorithm of combining the time sequence analysis and event analysis is developed to detect and judgment the legality of the pedestrians so that the gate of the AGM is either opened or closed. Then, the algorithm is implemented by software method and FPGA method respectively. Finally, the experiments on the prototype of AGM prove that the recognition rate and the recognition speed are increased effectively.
Based on Energy Recovery of Hydraulic System’s Calculation of Energy Consumption
Authors: Tian Yong , Gao Hong Wei , Liu Bo , Li Wei Qi
Published: February 2012

Introduced the energy recovery hydraulic elevator system's principle of work, calculated the uplink and the downlink of the hydraulic elevator system's useful work, total power and efficiency, results show that energy-saving effect of the hydraulic system was more obvious.
Classifiers’ Environmental Friendly (Green) Re-Design
Authors: Li Kun Shan
Published: February 2012

In this paper, the author redesigned the high efficiency rotor classifier under the premise of the environmentally green theory using the traditional design concepts with modern design methods; combined with years of experiences in classifier designing and integrated practical ideas from expertise in the profession.
Attitude Control of Flapping Wing Micro Aerial Vehicle Based on Double Fuzzy Sliding Mode Control
Authors: Hu Sheng Bin , Lu Wen Hua , Chen Zhi Yi , Lei Lei , Zhang Yi Xuan
Published: February 2012

An adaptive Double Fuzzy Sliding Mode Control scheme for attitude control of Flapping Wing Micro Aerial Vehicle is proposed in this paper. Based on the feedback linearization technique, a sliding mode controller is designed. To faster response speed, a fuzzy controller is designed to adaptively tune the slope of sliding mode surface. To reduce the chattering, another fuzzy controller is designed to adaptively tune the switch part of sliding mode control. The system stability is proved by Lyapunov principle. Simulation results show that the proposed control scheme is effective.
CFD Analysis of PWR Surge Line Subjected to Thermal Stratification
Authors: Rasool Athar , Sun Zhong Ning , Wang Jian Jun , Ge Zeng Fang , Ali Majid
Published: February 2012

Thermal stratification effects have been a great concern in a pressurizer surge line of pressurized water reactor (PWR) since 1988. These effects may damage the structural integrity and contribute in reducing the operational life time of pressurizer surge line. Several nuclear power plants operators have so far reported such mechanical damages. To realistically assess the structural integrity of pressurizer surge line subjected to thermal stratification, it is necessary to analyze the transient temperature distribution. Several researchers and scholars have carried out considerable efforts to determine the temperature distributions in the pressurizer surge line. In this study, an effort has been made to simulate the behavior of thermally stratified flow and predict the transient temperature distributions in the pressurizer surge line realistically. To obtain realistic results for such complex geometry of pressurizer surge line 3D analysis is performed using CFX commercially available CFD software. The transient temperature distributions obtained are presented and discussed.
An Impact Analysis of Corn Plant Spacing on Mechanical Harvesting
Authors: Ni Zhi Qiang , Ren Jing Rui , Yang Bao Ling , Zheng Zhi An , Gao Zhen Jiang
Published: February 2012

The influence of corn plant spacing on mechanical harvesting was analyzed. Corn flexible model was established through the flexible body module of ADAMS by using virtual prototype. Mechanical dynamics simulation was performed. Plant spacing was suggested to a significant positive correlation on the efficiency of mechanical harvesting. During mechanical harvesting, weight loss is dependent on plant spacing. The optional range of corn plant spacing was between 0.15m and 0.2m according to the simulation results.
2D Simulation of Flow and Sludge Distribution in a Circular Secondary Clarifier
Authors: Liu Y.L. , Zhang P. , Wei W.L.
Published: February 2012

In this paper, we use solid–liquid two-phase mixture model and the Realizable k-ε turbulence model to numerically simulate the advection secondary flow and sludge concentration distribution in a circular secondary clarifier. The PISO algorithm is used to decouple velocity and pressure. The velocity field and the sludge concentration distribution are obtained by the proposed model.
Analog Circuit Intelligent Fault Diagnosis Based on PCA and OAOSVM
Authors: Guo Ke , Zhu Yi , San Ye
Published: February 2012

Fault diagnosis of analog circuits is essential for guaranteeing the reliability and maintainability of electronic systems. Analog circuit fault diagnosis can be regarded as a pattern recognition issue and addressed by one-against-one SVM. In order to obtain a good SVM-based fault classifier, the principal component analysis technique is adopted to capture the major fault features. The extracted fault features are then used as the inputs of SVM to solve fault diagnosis problem. The effectiveness of the proposed method is verified by the experimental results.
Design the Information System of the Locating and Tracking Harbor Tug Based on the Web
Authors: Cui Ting Ting , Xiao Han Bin , Dai Jin Shan
Published: February 2012

In order to manage the tug better, efficiently and securely dispatch tug operation, and meet the real-time property, accuracy requirements, the GPS chip of embedding RFID for locating and tracking would be used. Through the wireless Radio Frequency technology and Ethernet, it can complete conveying information between tug and harbor dispatching room, then structure the tug locating and tracking information system. It can real-timely acquire and monitor the tug parameter of position, desired track, operating condition and so on. According to that, it makes real-time dispatching. Efficiently achieve the management in harbor pass, operation and assignments all the time and space.
Design and Research on Piezoelectric Acceleration Geophone
Authors: Xing Ya Min , Liu Sheng Hu , Wang Dong Xu
Published: February 2012

A kind of piezoelectricity acceleration geophone is studied and discussed. carried on its amplitude frequency, phase-frequency characteristic theoretically, obtained the primary factor of the influence on frequency response, and improved in the piezoelectric crystal choice and geophone structure. The theory and the field test result indicated that, this piezoelectricity acceleration geophone has better response characteristic on low frequency and the high-frequency as well as a higher sensitivity, it is one better detection method.
Design of Product Key Characteristics Management System
Authors: Du Wei , Mo Rong , Li Shan , Li Bo
Published: February 2012

The product key characteristics (KCs) which are the small number of key product quality information have a significant impact on customer requirements. Firstly, the definition and classification of KCs was studied. Secondly, KCs evolvement model in the product lifecycle was proposed. The KCs evolvement consists of the KCs breakdown during design and the KCs realization during manufacturing and assembly. Thirdly, according to KCs process analysis, management mechanism of KCs based on workflow technology was presented. The workflow engine drives the KCs process and enables KCs to transfer accurately and quickly. Finally, a model of KCs management system (KCMS) based on web services was proposed.
Design of Hydraulic Transmission Bicycle Based on Top-Down Method
Authors: Yang Yan Hong , Zhong Xiang Qiang
Published: February 2012

Hydraulic transmission bicycle is a new type of vehicle. It is crucial for founding an effective method of rapid development for new product. The concept drafting of hydraulic transmission bicycle was drawn, the multiple layer assembly model was built based on parametric feature modeling technique, the skeleton model and total design of hydraulic transmission bicycle was accomplished by top-down method and drawings of relevant parts based on three-dimensional model were created. The result shows that top-down method provides a new idea to improve the rapid design of product’s updates.
Fingerprint Identification System Based on DSP
Authors: Bao Ya Ping , Liu Li , Wang Yuan , Song Qian
Published: February 2012

This paper introduced a fast fingerprint identification system based on TMS320VC5416 DSP chip and MBF200 solidity fingerprint sensor. It precipitates fingerprint identification device developing into the direction of miniaturization, embedded and automatic.It recommends fingerprint identification system hardware and software design and the main system processing flow, aim at fingerprint identification arithmetic, the influence of system operation speed is being researched at the same time. High-speed data acquisition system is been built in order to achieve a DSP fingerprint identification system with high efficiency and low cost.
Development of Pipe-Soil Interaction Experimental System for Steel Catenary Riser in Touchdown Zone
Authors: Hu Zhi Hui , Duan Meng Lan , Zhao Dong Hong , Li Wei
Published: February 2012

Pipe-soil interaction of steel catenary riser in touchdown zone has complex nonlinear dynamic characteristic, is difficult both in theoretical calculation and in numerical analysis. Meanwhile, pipe-soil interaction model experiment can promote the theoretical and numerical study on the issue well; experimental results can be used to guide the practical engineering design. This paper reviews the achievements of existing model experiment research, and proposes aspects which further research could focus on, then presents a pipe-soil interaction experiment program, develops test devices and achieves better test result. Therefore, these devices can play a key role in further research on the pipe-soil interaction in touchdown zone.
Study and Simulation for Optimization Plan of the Liquamatic Fire Water Cannon with Self-Swinging Device
Authors: Zhou Ji , Li Guo Rong
Published: February 2012

In this paper, fluid field simulation was conducted with the fire water cannon, which is one of the most commonly used equipments in fire fighting. The working principle of the liquamatic fire water cannon was introduced. The internal flow performance was simulated using Fluent software; and the influence rules on jet characteristics were analyzed by changing the cross-sectional shape and diameters of the monitor body, inlet pressure and drive set of the self-swinging device. These analyses led to the optimal structural parameters of flow channel. These simulation results will provide useful theoretical guidance for design of other types of fire water cannon. The liquamatic Fire water cannon with self-swinging device was designed. The mechanism of an impeller driving four bar linkage was applied as the self-swinging device.
The Study of Planar Five-Bar Parallel Robot Dynamic Characteristics
Authors: Chen Shang Yue , Xin Hong Bing , Mo Han Ning , Chen Mei Yu , Zhao Dong Yang
Published: February 2012

By introducing the experimental purpose, instruments and the main function of the planar five-bar parallel robot dynamics, this paper concluded the principle diagram of control system of the planar five-bar parallel robot. And the method and process of the experiment was detailed description. Through the analysis of vibration acceleration curve and frequency domain curve, which were obtained by the experimental data of the planar five-bar parallel robot end-effectors, the characteristics of time and frequency domain of the planar five-bar parallel robot were clearly shown.
The Connecting Performance Analysis for a New High Speed and Precision Double-Contact Toolholder
Authors: An Guo Ping , Chu Hong Ke , Zhao Yong Sheng , Cai Li Gang
Published: February 2012

The connecting performance of a new high speed and precision double-contact toolholder (BTF toolholder) is studied in this paper. The mechanics of elasticity and Finite Element Method (FEM) are used to analyze the effect law between the clamping force and the connecting performance, respectively. The contact stress and deformation are obtained for the tapper and surface of flange interface. The optimal clamping force is derived for the BTF toolholder under the limited rotational speed. By comparing with those of the conventional BT toolholder, the BTF toolholder has higher stiffness and outstanding connecting properties. The research results will provide the basic theory and data support for the optimization and application of toolholder.
The Research of Graphite Electrode to Processing Technology and NC Programming
Authors: Guo Zhong
Published: February 2012

Based on the analysis of graphite processing characteristics, this work presents the research of the graphite electrode structural design for electric discharge machining, and also describes the option of graphite processing cutting tool materials and the angle of cutting parameters. The standard-processing technique of graphite electrode NC machining is discussed, and the special processing method of the kind of thin and narrow electrode machining is explored, The availability of research results is verified by the examine in practical machining
Indoor Ultrasonic Positioning System Based on CDMA-TDOA and its Ultrasonic Signal Analysis
Authors: Yang Yang , Xiao Jin Hong , Liu Zhi , Cui Jin Feng , Liu Dan
Published: February 2012

This paper introduced some indoor positioning techniques. On this basis, the indoor ultrasonic positioning system based on CDMA (Code Division Multiple Access)-TDOA (Time Difference of Arrival) is proposed, and its operating principle and the analysis of ultrasonic signals are described. The system based on the character of radio frequency and ultrasonic sensors encodes the ultrasonic signal using CDMA technology, so that the destination node can distinguish each beacon signal sent beacon ultrasound signal, and combines with the RF signal to achieve TDOA location algorithm, and ultimately performs three-dimensional positioning. Using the MATLAB/Simulink blocks, the three ultrasonic beacon signals are simulated and discussed. Finally, simulation results show that the three ultrasonic beacon signals can be received and identified in the destination node.
Minimum Norm Multidimensional Scaling Solution for Mobile Station Localization in Wireless Sensors Network
Authors: Qin Shuang , Wan Qun , Duan Lin Fu
Published: February 2012

Mobile station (MS) localization which plays an important role in the process of target continuous localization has received considerable attention. In this paper, a novel multidimensional scaling (MDS) method based on Minimum norm solution is proposed for passive emitter location in wireless networks. It is shown that the proposed approach is a generalization of the mobile localization method based on multidimensional scaling (MDS) analysis. Through computer simulations, we can see that the proposed algorithm has a better performance compared with classic MDS and subspace algorithms in time of arrival (TOA) measurements.
Study of Optical Gas Chamber Based on Infrared Gas Sensor
Authors: Liang Ting , Yang Xu Jun , Xue Cheng Yang , Zhang Wen Dong
Published: February 2012

In this work, design method for fabricating optical gas chamber of infrared gas sensor was introduced in detail. IRL715 infrared source, PYS3228 pyroelectric detector with double filters and optical gas chamber were assembled into the optical gas chamber, and then the Nor-infrared (NDIR)gas sensor was produced. After tested in specific methane environment, the performance of optical gas chamber was verified. Meanwhile, optical gas chamber was processed with dustproof and waterproof measures. Experimental results show that response sensitivity of optical gas chamber is good.
Mechanical Properties of High Strength Concrete Filled Steel Tubular Columns
Authors: Tan Ke Feng , Liu Lai Bao
Published: February 2012

This study investigated the mechanical properties of High Strength Concrete filled steel tubular short columns (HSCFSTSC) with length to diameter ratio (L/D) of 3.5.The strength of concrete used to fill the steel tubular columns ranged from 54MPa to 116MPa. The test results showed that using a steel tube as confinement can significantly improve the ductility and compressive strength of core concrete. The magnitude of compressive strength increase of core concrete was directly proportional to the Confinement Index, , and the extent of improvement of the ductility increases as the  increases. For thoroughly improving the ductility of core concrete, the Confinement Index  should be equal or larger than 0.48. The formula used to calculate the load bearing capacity of HSCFSTSC was given out.
The Effect of Element Ag and P in Dissolving Action and Mechanical Performance of the Welds during Weld Brazing of Copper
Authors: Li Yi Nan , Peng Zi Long
Published: February 2012

Dissolving action of Ag and P during weld brazing of thick copper plates without preheating was investigated and the mechanical performance of the weld of copper was analyzed. The difference of dissolving action between Ag and P is that Ag-Cu binary alloys dissolve base metals in form of body dissolution, while P diffuse into grain boundary first and reach the limit solid solubility gradually then the surface layer of base metal begins to dissolving. The stirring function of arc is important for dissolving action of P but has little effect on dissolving action of Ag. P in form of rigid and brittle Cu3P increases the micro-hardness of welds.
Research on the Distributings of Vibration Sensors for Fault Diagnosis in Axial Piston Pump
Authors: Wu Sheng Qiang , Liu Cai Qin , Cao Er Ling
Published: February 2012

Considering that the distributings of sensors will affect the fault diagnosis results directly, how to distribute vibration sensors for fault diagnosis in axial piston pump are researched. The corresponding feature frequency bands of various faults are analyzed, effects of collecting signals are compared in differrent fixings of vibration sensors, placements scheme of the sensors is proposed. Combined with the experimental data, the best distributings of vibration sensors is obtained. Research result provide a strong support in the pump monitoring and fault diagnosis field and reference in other complex mechanical vibration fault diagnosis field.
A Novel Measurement and Qualification Method of GMAW Welding Fault Based on Digital Signals
Authors: Feng Sheng Qiang , Ling Guo Ping , Ma Bing , Hu Sheng Sun
Published: February 2012

Online fault non-destructive detection is crucial to the fabrication of high quality products of welds. In this study, a novel method in the field of weld whose name is Mahalanobis Distance Measurement (MDM) is illustrated and employed to determine whether welding faults have occurred or not. This method is based on an arc method which is employed to get the information of welding voltage and welding current. Through analyzing the calculation results of Mahalanobis Distance of the welding voltage and current signals, the important information of welding process has been obtained. At the meanwhile, whether a fault has occurred or not is decided. In order to verify the effect of the performance of the different width of the gap on the results of Mahalanobis Distance, two widths of the gap generated artificially were chosen: one is 2 mm and the other is 3 mm. The results of the experiment have demonstrated that using the thinking of Mahalanobis Distance to measure the weld faults is feasible.
Study on the Dephosphorization in Basic Electrode Welding
Authors: Xiong Zheng
Published: February 2012

The process of dephosphorization for basic electrode and distribution of phosphours between slag and deposited metal(Lp) in manual metal arc welding has been researched by means of experimental and theortical analyses. The results indicate that P content in deposited metal decreased with the increase of coating basicity of the electrode and FeO content in slag. The distributive coefficient of phosphorus Lp increased with the increase of coating basicity of the electrode and FeO content in slag. Although dephosphprylation in deposited metal was a limit finally, it was satisfactory under suitable selsction of the value of FeO in slag and coating basicity of the electrode according to the experimental results.
Effect of Passivation on Pitting Corrosion of 316L Stainless Steel in Concentrated Seawater
Authors: Lang Feng Jun , Ma Ying , Liu Jian Rong , Huang Xian Qiu , Li Mou Cheng
Published: February 2012

The influence of passivation on pitting corrosion of 316L stainless steel in concentrated seawater was investigated by using cyclic anodic polarization and critical pitting temperature. The results indicated that the pitting potential of passivated specimen was higher than that of matrix specimen in concentrated seawater at 25°C and 85°C. Critical pitting temperature value of passivated specimen was 56°C, which was much higher than 11°C for matrix specimen. Pitting corrosion occurred in the formed pit of passivated specimen, and metastable pit, lacy cover and new pit were observed in pit morphology.
Accelerated Fatigue Life Testing of Nicr-Cr3C2 Coating at Different Loads under Rolling Contact Condition
Authors: Wang Shao Yun , Li Guo Lu , Wang Hai Dou , Liu Jin Hai , Xu Bin Shi
Published: February 2012

The aim of this paper is to address the accelerated fatigue life under rolling contact condition of coatings. The NiCr-Cr3C2ceramic-metal and Ni-Al alloy were deposited on steel substrate as topcoating and undercoating using supersonic plasma spraying technique, respectively. Accelerated fatigue life tests were conducted using a ball-on-disc tester. The life of coatings was evaluated by Weibull distribution plots and the accelerated fatigue life model was established. The results showed that the coupling relationship between the load and failure life of coatings could be obtained using this model. Accelerated life test for fatigue of coatings could improve the experimental efficiency.
Study on Welding Parameters Optimization of Duplex Stainless Steel 2205 Based on Orthogonal
Authors: Wang Zheng Lun , Wang Zhi Xiang , Zhang Yu
Published: February 2012

For the duplex stainless steel 2205 used to make into chemical ships in shipyards，TIG welding is used for the welding test of duplex stainless steel 2205. Residual stress on 2 mm thick welding specimen is tested with the slot-cuting method,and the distribution of longitudinal residual stress along weld cross-section has been found. Orthogonal test methods are also used in this paper to optimize welding parameters.
Wear Behavior of Diamond+SiCp-Reinforced Metal Matrix Composite by Taguchi Method
Authors: Şahin Yusuf , Öksüz K.Emre , Şimşir M.
Published: February 2012

Fe-Co based diamond-reinforced composites (D-MMCs) and diamond+SiC-reinforced composites (D+SiC-MMCs) were produced by cold pressing method. Investigation of the wear behaviors on two-body abrasive wear behavior of the composites were carried out under different conditions. 2k factorial designs of experiments were used to obtain the data in a controlled way. The wear parameters studied were sliding speed, load and sliding distance. An orthogonal array and analysis of variance (ANOVA) were employed to investigate the influence of process parameters on the wear resistance of these composites. The results indicated that the incorporation of SiC particles in the metal matrix as a secondary reinforcement increased the wear resistance. In addition to this, the applied load had the significant effect on the weight loss of both types of composites. Furthermore, a correlation was derived from the results of the experimental design by multiple regressions. Finally, confirmation of experiment was conducted to verify the predicted model.