bluuebunny/crossref_metadata_2025 huggingface dataset:
Multichannel Vibration Fault Diagnosis for Rolling Bearings Based on QPCA and SVM
Authors: Li Zi Fa , Li Jin Guo
Published: February 2011

A new method had been proposed in this paper of fault diagnosis for rolling bearings based on multichannel vibration signals and QPCA-SVM-based method. The vibration signals were obtained by some multi-sensors with three channels X, Y, Z, that were orthogonal axes. The three orthogonal axes signals were constructed a pure quaternion sequences as samples for processing. The pure quaternion sequences data set was processed by quaternion principle components analysis (QPCA) for feature extraction, and then combined with pattern recognition tools support vector machine (SVM) for classifying some faults patterns. The experimental results indicated its efficiency, and it provided a method for fault diagnosis on multichannel vibration signals.
Dynamic Response of Complex Structure in Half Space
Authors: Gao Ming Song , Chen Zhi Gang
Published: February 2011

The problems of SH-wave scattering caused by a subsurface circular lining structure and a beeline crack with arbitrary length at an arbitrary position were studied by using the methods of Green's function, complex variables and multi-polar coordinates. A adaptive Green's function, an essential solution to the displacement field for the elastic space possessing circular lining structure while bearing out-plane harmonic lining loads at an arbitrary point, was constructed firstly, and then a crack was created using “crack-division”. Thus the expressions of displacement and stress were established while the crack and the inclusion both existed. Finally, we give some numerical examples to discuss the variety of the horizontal surface displacement in the case of different parameters.
The Effect of Ultra-High Pressure on the Functional Property and Conformation of Whey Protein Isolated
Authors: Liu Hui Ping , Wei Yong Hua , Xu Yi Wen
Published: February 2011

The whey protein has a highly nutritional value but poor functional properties. Ultra-high pressure (UHP) is a new technology for food processing. It dose not cause environmental pollution and could maintain food nutrition as much as possible. The effects of applied pressure and treatment time on functional properties and conformation changes of whey protein isolated (WPI) treated by UHP were studied in present paper. The results indicated that WPI treated by UHP showed reduced solubility, foaming and emulsifying property with the increasing of applied pressure and prolonging of treatment time. For WPI treated at 400MPa for 15min, the 1-anilinonaphthalene-8-sulphonate (ANS) studies showed the increasing fluorescence regions when the applied pressure increased. The most fluorescence regions were exposed to aqueous solution for WPI treated at 400MPa for 5min, and degree of exposure reduced when treatment time was prolonged. With the increasing of applied pressure and prolonging of treatment time, the amino acid residues having ultraviolet absorbance showed the same change as hydrophobic group.
The Oil Absorption of Soy Protein Isolate in High Temperature and Humidity Storage
Authors: Sun Bing Yu , Shi Yan Guo
Published: February 2011

The SPI was applied in food industry widely, but the functionalities of it may change during storage. The effect of store temperature, time, RH and package material on SPI component and oil absorption were studied, when SPI was packaged in 100% N2 and Al, 80%N2:20%CO2 and Al, 60%N2:40% CO2 and Al, vacuum and Al, white paper/plastic/HDPE, and PE and then stored for 5 months in the conditions of RH 80% and 30°С. It was observed by SDS-PAGE that the subunit of SPI disaggregated and molecules aggregated. Comparing the functionalities of SPI with different packaging material, it was shown that the sequence of the barrier property of material to T and RH was Al packaging >factory packaging >PE packaging. Analysis by relatedness, it was shown that the 7S/11S of SPI with PE packaging storage was significantly positive with oil absorption (0.942**). The content of -SH with 60%N2:40%CO2 was significantly negative with oil absorption (-0.819*) but the -S-S- of SPI in 60%N2:40%CO2 was significantly positive (0.811*) correlation with oil absorption.
The Research and Realization of Efficient DDA Interpolation Algorithm for Multi-Axis Linear Linkage
Authors: Yan Xiao Ling , Zhang Jia Ying , Wang Wang Long
Published: February 2011

A new efficient interpolation algorithm for multi-axis linear linkage is proposed in this paper, which uses the principle of DDA algorithm, its function be extended and improved. the left normalized data is used in this algorithm, the maximum amount of movement is used as the basis for the calculation of speed, the efficiency of the interpolation is improved and the uniformity of speed is ensured. At last machining result are presented, which shows that this algorithm is powerful to machine spherical surfaces and planes.
Cost Optimization of Scheduling Based on Simulation
Authors: Li Ji , Du Ping An
Published: February 2011

For most past scheduling problems, research condition is based on enough orders. But on the condition of production capability more than the number of the orders, how to accomplish the limited orders to make the production cost as small as possible is a significantly considered question. Based on Plant Simulation and its Genetic Algorithm, a method of optimizing production cost when scheduling is put forward. This research realizes the relevant scheduling to minimize the production cost and propose a solution for these problems of complex combined cost optimization.
Balance Analysis and Improvement of Flywheel Production Line
Authors: Jia Qiu Hong , Xiao Yan , Gong Yu Jie , Zhou Kang Qu
Published: February 2011

It studies the balance problems of cycle time of a flywheel production line in this paper. Based on the working time measured using lean manufacturing (LP) methods, the bottleneck processes of production line are found by simulating with software Witness, which is improved by using production cycle balancing method. Comparing the relevant parameters before and after the production line balance,the improvement results of production line are significant and the production efficiency can be improved.
Study on Application of Grey System Theory in Fatigue Span Design of Machine Tool Axles
Authors: Xu Jin , Wang Chun Xia
Published: February 2011

The interdependent relationship of fatigue stress and span was regarded as a grey system using grey system theory and method. The stress level of fatigue test was uniformly divided into many grades and the whiting value of safe span was found out. A smooth discrete function was formed based on one accumulation of safe span value series. Therefore, the model of grey system was set up and the differential equation of grey system was solved. The accuracy of model was improved by revising the residual model. The safe span value at every stress level could be calculated using the reduction model of the grey system. It provided a new way for the safe span calculation of mechanical parts, which would be of great application value.
The Design of Automatic Conveying System for Hot Rolling Bearing-Steel-Ball Blanks
Authors: Zhou Yi Dan , Wang Qian , Ma Su Yang
Published: February 2011

According to the hot rolling technological requirements on the bearing-steel-ball blanks, an automated conveying system program was proposed. The primary structure and the characteristic of this automatic conveying system was introduced as well as the working principle of it. It was found that the system possessed the advantages such as higher feeding accuracy, good job stability and rational construction and it can meet the process requirements.
The Design of Jumping Robot
Authors: Wang Ke She , Mi Jie , Zhang Wei , Xu Yu Xiang , Wang Dong
Published: February 2011

With the rapid development of the robot and changing functions, there are most of the problems existing over barriers. Therefore, the rescue jumping robot comes. It uses mainly compression spring to produce elastic energy which effect on the ground. The jumping robot leaps better to solve the problem of turning over obstacle. The jumping robot is controlled by single-chip microcomputer to walk, jump, and detect and so on, which can realize remote wireless control and has broad application prospect.
Construction of 7YGS-45 Type Orchard Transport Automatic Control Test Platform
Authors: Li Shan Jun , Xing Jun Jun , Zhang Yan Lin , Li Xue Jie , Fan Qi Zhou
Published: February 2011

In order to solve the problems during the mountain orchard transportation, the 7YGS-45 type self-propelled duel-track orchard transport was developed. Since the optimization of operating parameters and structure parameters are difficult to be settled at the site of installation, so it’s necessary to construct the automatic control test platform. The Platform is mainly consists of rack section, automatic control part and testing part and other components, and can be used to analyze the changing index of wheel pair’s structural parameters of the driving mechanism, when under the different situations of loading capacity, pre-load, running-speed, and slope angle; spindle torque and rotating-speed of the driving mechanism; wear rate of driving wheel’s groove; and slipping rate of steel wire rope. The platform can also be used to test the overall performance’s parameters of other small track transports, and provide test conditions and theoretical analysis basis for optimization of the transport’s performance, which absolutely has application values.
The System Model of the Bulldozer Machine Based on the Theory of Design Space Integration and its Experimental Verification
Authors: Wang An Lin , Yue Bin Nan , Liu He , Zhou Peng Ju , Gong Bang Fu
Published: February 2011

Bulldozer transmission and control of physical energy involved in a variety of forms, many parts of local parameters for the overall performance of mutual coupling, and it is difficult to quantify. To solve the bulldozer engineering machinery represents more conditions, more energy state, and difficult to quantification, this paper integrated chassis, ground mechanics, mechanical, hydraulic, hydraulic transmission and other theories, the use of mechanical ,electronic and hydraulic integration design space thought, a hydraulic transmission system model bulldozer is established. For the dynamic performance of the hydraulic drive bulldozer prototype test, testing and simulation complement each other, through the test results to verify the accuracy of models and simulation, through the simulation to make up for poor reproducibility of test defects. To achieve the applications of engineering in typical models, the performance analysis platform of hydraulic drive bulldozer has been developed.
Factors Affecting the Design of Product Innovation
Authors: Wang Ting , Zhao Feng , Deng Han
Published: February 2011

This paper offers five factors affecting the design of product innovation. It involves that demand and need, the development of science and technology, enterprise, society and nature. Through the analysis, the author built a relational graph of the five factors affecting the design of product innovation.
Constant-Universal Joint of Double Cross-Cross Ring Based on Spatial Linkage
Authors: Zhang Xin , Chen Zai Liang , Gao Hui
Published: February 2011

This paper discuss the develepment of constant-universal joint and bing up a new type of constant-universal Joint through analysing the advantages and disadvantages of constant-universal joint and simulation of movement with PROE that testified its possibility of constantspeed.the new type constant-universal Joint can attain the same function of Thomson constant-universal Joint,iding capacity,low friction loss and bearing axial load.Further,it get a more effective centring type.
The Research and Application of Drilling Fluids Technology in Zhoushen Well X1
Authors: Wei Zhong Liang , Ge Lin
Published: February 2011

Zhoushen Well X1 is a deep and exploration well, there are some difficulties in drilling fluids treating: The borehole is large, the open hole is long and the rock density proportion is high in the overlying strata. So the drilling fluids must have good suspended and sand carrying; there are brown mudstone, gypsum mudstone and light gray fine sandstone in the lower strata, swelling and hole shrinkage always happen. So the key point is ensuring well wall stability and preventing swelling and hole shrinkage. The drilling fluids must have strong Calcium-tolerance and good compatibility with formation for coping the swelling and hole shrinkage of the high conductivity mudstone in the deep well section. Because well temperature is high in the lower section, the stability of anti-high temperature is very important. The drilling fluids must have prevention against high temperature denseness ability and good rheological property.
Development of CAD/CAE Software System for Raw-Soil Structure
Authors: Zhou Zhi Hao , Hu Jia , Zhang Qi Lin
Published: February 2011

With the good ecological functions, the raw-soil structures attract attention of the people all over the world recently. According to surveys, more than 30 million farmers in China still choose to build their house using raw-soil. Since the advent of CAD/CAE techology, it became easier for engineers to design better buildings. However, for lack of adequate research on raw-soil structure, existing domestic and oversea softwares are incapable of solving the detailing work of this structure. In this paper, characteristics of the raw-soil structure and software function requirements are analyzed; the framework, data structure kernel are designed for a specialized detailing CAD information system based on BIM (Bulidgin Information Modeling). Finally the raw-soil software is developed with Object ARX technology and AutoCAD graphics platform, and an example is introduced to show the main functions.
Research on PCB Electroplating Current Monitoring System Based on a Wireless Sensor Network
Authors: Li Xiu Feng , Xian Hong Xiong
Published: February 2011

A system by using computer techniques， wireless communication and sensors is designed for monitoring electroplating current of PCB. This monitoring system uses wireless sensor nodes based on NEF9E5 MCU as the center unit, and uses a Hall current-sensor and its peripheral circuit. The system implements the wireless communication between wireless sensor nodes and the computer by using the method of time partitioned multiple addresses. The tested results show that the system is practicable, reliable and low-cost，and could be widely applied and developed in the future．
Study on Polarization Distribution of Polarization Encoder in Oblique Incidence
Authors: Zhou Mu Zhun , Chen Yan Ru , Zhao Qi , Xin Yu
Published: February 2011

Principle of polarization encoding based on electro-optic effect of LiNbO3 crystal is analyzed, effact on polarization encoding optical field effects is studied when the incident light direction changes. Theoretical calculations show that, with the angle between the direction of incident laser beam and the main axis of LiNbO3 crystal increases, rotation angle of polarization ellipse remain unchanged,but ellipticity changes at any other position except in the center of the encoder,at the top and bottom of encoder,polarization state changes from circularly polarized to elliptically polarized,at other position of the encoder, polarization states are still elliptically polarized light but with different ellipticity angle. Experiment measurement results are in accord with ones of the calculation.
The HSM Intelligent Database System Based on Neural Networks
Authors: Liu Li Juan , Lv Ming , Wu Wen Ge
Published: February 2011

High speed cutting (HSM) is one of the main trends of cutting machinery. In our country, the relevant research of HSM starts later, the actual machining and experiment on the machining technology and the machining parameters of HSM are few, the reasonable machining parameters selection scheme and the appropriate cutter choice method are lack. The paper established the HSM cutters management system based on BP artificial neural networks to facilitate optimized database system and to improve cutting efficiency. The result shows the system is very helpful to select cutting parameters and the value of prediction fits with the test very well.
3D Finite Element Analysis for Magnetic Flux Leakage Testing
Authors: Song Qiang
Published: February 2011

Magnetic flux leakage (MFL) is a non-destructive testing method used to inspect ferrous materials. However, apparatus parameters could affect the MFL inspection tool’s ability to characterize anomalies. In this paper, MFL signals obtained during the inspection of pipes have been simulated using three-dimensional finite element analysis and the effects of magnet assembly on MFL signals are investigated. According to numerical simulations, an increase in the leakage flux amplitude is observed with an increase in the permanent magnet size and the inflexion point may indicate the presence of magnetizing pipe wall to near saturation. It clearly illustrates degradation in the MFL with increasing backing iron length. The relationship between MFL apparatus parameters and MFL signals could be utilized in the MFL technique to characterize the defect.
Griffith-II Type Crack Generation and Chip Formation Simulation in Vibration Turning Based on Prandtl-Reuss Flow Principle
Authors: Gu Li Zhi , Hong Qi , Cheng Bin
Published: February 2011

In order to profound the function of stress wave in vibration turning and present the effectiveness of instant change of stress and strain in the workpiece under the shock load,put forward a simulation model of materials obeying Prandtl-Reuss flow principle with non-linear constitutive relation for vibration turning with low frequency.Related techniques have been stressed on criterion of chip separation from the workpiece, friction between the chip and the rake of the tool. Results of simulation for both conventional and vibratory turning show that the dynamic stress intension factor is 1.45 times or more in vibratory turning than that in conventional turning. It is the stress wave that leads to the accumulation and concentration of stress, the dislocation pile-up, facilitating the chip generation and development.
Feedstock Characterization for Micro Powder Injection Molding (μPIM)
Authors: Li Haw Pei , Muhamad Norhamidi
Published: February 2011

In this experimental work, Micro Powder Injection Molding (μPIM) was carried out with stainless steel feedstock. The feedstocks with powder loading between 60 v/o to 62 v/o were prepared with 5μm stainless steel powder, Polyethelena Glycol (PEG), Polymethyl Methacrilate (PMMA) and Cellulose Acetate Butyrate (CAB). The main objective was to determine the homogeneity and flow characteristics of the mixture. Capillary rheometer method was performed to define the sensitivity of viscosity to shear rate and temperature for the mixture. The rheological properties were investigated and analyzed through relevant equations. Results show that the flow ability and characteristics of μPIM feedstocks highly depend on the mixture composition. Feedstock at 61 v/o exhibited the most suitable characteristics when mixed at temperature of 130°C with a rotor speed of 30rpm.
Local Gouge Detection Algorithm for 5-Axis Sculptured Surface Machining Using the Toroidal Cutter
Authors: Fan Wen Gang , Li Jian Yong , Cai Yong Lin , Huang Ze Hua
Published: February 2011

Based on the geometrical property of the toroidal cutter, an improved local gouge detection method for 5-axis sculptured surface machining was presented here. By alternately taking full advantage of point projection principles on curve and surface, the minimum distance between the circular curve of the toroidal cutter and the design surface was firstly calculated. Then the local gouge detection was accomplished through comparing the minimum distance with the corner radius of the toroidal cutter. The maximum interference quantity required for correction was also gotton. Results of an example showed the new method was correct and stable.
Circumferential Distribution Characteristics of Airflow in Blast Furnace Hot Blast Systems
Authors: Liu Cheng Song , Wu Sheng Li , Xu Jian , Fu Chang Liang , Kou Ming Yin
Published: February 2011

The circumferential distribution characteristics of airflow in bustle pipe and each tuyere have been simulated and researched through establishing mathematical model of blast furnace (BF) hot blast systems. The disputes on the circumferential distribution characteristics of airflow in bustle pipe at home and abroad were settled. The results show that, under the premise of uniform pressure distribution in hearth and tuyere section area, except that of the nearest ones, the velocity of airflow in these tuyeres which are near to the main pipe is lower than those far away from the main pipe because of the existence of vortex. However, both the fluctuation range of all tuyeres’ air velocity and its influence on tuyere raceway depth are small and can be ignored.
Design and Research of a New Portable Barrel-Scrubbing Robot
Authors: Tao Wei Jun , Liao Kai , Feng Hu Tian
Published: February 2011

Aiming at the existing problem of cleaning the inner barrel hard, a new portable barrel-scrubbing robot was designed and researched. First of all, the working principle and scrubbing mode of this robot were described. Secondly, the main modules of this robot were designed and its control system was constructed. Finally, a developed prototype of this robot was introduced, and the robot’s motion function was validated through some experiments.
Analysis and Implementation of Coulomb’s Frictional Material on the Wheeled Platform of Moving Robots
Authors: Wang Ching Kuo
Published: February 2011

This paper develops an intelligent braking system (IBS) to navigate escaping motions of wheeled robots with variable center of gravity. The piecewise mapping in geometric space instead of the traditionally pointwise coordinate transformation in algebraic space is developed for quasi-nonholonomic systems in the topological point of view. The escaping dynamics of wheeled robots, not only onto the constrained space but also onto the unconstrained space, occurs when the vehicle escapes from the constraint manifold during braking or cornering. Traditionally, such slippage phenomenon is usually ignored because of strong nonlinear features. The proposed IBS consists of a traditional controller designed for the “rigid” subsystem and an IBS controller designed for the “softened” subsystem. This paper is primarily focused on modeling, analysis and control issues of intelligent braking problems for moving robots with variable center of gravity. Finally, computer simulations of wheeled robots are carefully made under the assumption of Coulomb’s viscous friction to justify the advantages of the proposed IBS algorithm.
The Optimize Design of the Intelligent Electric Mini-Car
Authors: Zhang Yun Zuo , Zhao Qiu Ming
Published: February 2011

In the fields of auto-control, the requirement for dependability and intelligence of the instrument is often to be considered seriously. Since the capability of the electronic sensor and affect of the ambient temperature, the high dependability and intelligence is a hard aim to be reached. And the error through normal methods to design may be very large. The intelligence is poor. The article introduces the project process of making an Intelligent Electric Mini-car with high dependability and intelligence: which is consisted of SCM (single-chip microcomputer) SPCE061A, multiple kinds of sensors and some modules to support. Base on the SCM SPCE061A, the mini-car can identify different voice, record & play, race intellectually by the order of voice, dodge the barriers automatically and measure the distance accurately while running at different speed by introducing the PWM and the HALL speed sensor. At the same time, it has radar of backing a car, GPS (Global Position System) and the ability to detect alcohol in a motorman. To enhance the function of the mini-car, radiogram, MTV and LED of kinds of color is added, too. With the information displayed on the LCD and the voice register, it is easier to communicate with the mini-car. With the separate of circuit of controlling and electromotor, the stability of the system has improved. It has made good use of power to adopt 3.3V for the switch circuit and high efficiency PWM. Under the control of the voice order, it also can detect the real time and temperature meticulously. The project is adopting intelligent sensor and new SCM, which combined the multiple kinds of new intelligent electronic device, not only to measure the data for the system accurately, but also to communicate with us. At last the actual data of speed and distance is given to prove the feasibility of the project.
Research on Welding Robot Path Planning Using Ant Colony Optimization
Authors: Wang Jia Hai , Xiao Rui Heng , Ma Yun Lei
Published: February 2011

The path planning is one core aspect of the research of robotics. In order to solve the problem that the welding robot path planning in the production line of BIW is inefficient, this paper analyzes the problem of the welding robot path planning and abstracts it into the TSP model. Finally, the optimal welding path is calculated using Ant Colony Optimization (ACO) based on the MATLAB7.0 environment. The result shows that this algorithm is an accurate and effective tool for welding path planning.
Modeling and Analysis of the Steering Resistance Moment in Small Tracked Robot
Authors: Ou Yi , Huang Si Ji , Feng Hu Tian , Tao Wei Jun
Published: February 2011

A modeling method for steering resistance moment in small tracked robot is studied. First of all, Classical steering resistance torque modeling with uniform resistance is studied in low speed and high speed. Then the steering resistance torque modeling while lateral resistance and the pressure are linearly distributed is proposed. After that steering resistance moment modeling based on the stress-strain theory is used to describe the robot's steering resistance above different soil. Among them, the lateral resistance is nonlinear distribution. The driving experiments in three different vehicle terramechanics models are simulated and analyzed. Steering resistance moment modeling based on the stress-strain theory is closer to the actual working state of the robot. This modeling method for steering resistance moment has advantage on optimization and study in and control algorithm.
Design of an Intelligent Vehicle System for Storehouse Management Based on Image Processing and RFID Technologies
Authors: Li Wen Dong , Chen Guo Wei , Chen Jing , Zhang Xue Jun
Published: February 2011

This paper describes a new intelligent storehouse management vehicle system based on image processing and Radio Frequency Identification (RFID) technologies to ensure the security of storehouses of logistics enterprises and improve the efficiency of storage. The vehicle is able to go ahead automatically by visual navigation in storehouses with the function of face recognition and alarm, as well as automatic statistics of commodities. Hough transformation is used to detect straight lines for angle control, and RFID based component is applied to the commodity management. The results show that our vehicle and storehouse management system can successfully fulfill various tasks with high accuracy of performance, which will lead to a practical merchandise application after further improvements.
A Novel Approach for PC-Based Test and Measurement Applications Development with Autonomous Sensors
Authors: Zhao Jiang Bin , Shi Tie Lin , Yan Xin Ping , Yuan Cheng Qing
Published: February 2011

With technology advancement, more and more elements are integrated together. We briefly describe integrated sensors and summarize them into 4 generations, which are bare sensor, integrated analog sensor, integrated digital sensor and autonomous sensor. We propose an application-layer protocol named AgileSN to realize autonomous interchangeability and inter- operability, and made standard tools possible. We propose a novel autonomous sensor based PC test and measurement application development methodology and software tool, in which, a whole application is totally made up of autonomous entities, and the functionality is realized through soft- ware components and their links. We further give the Petri-Net model and a collision-free software bus design, and present an autonomous sensor based PC performance monitor application at last.
Hardware-in-the-Loop Simulation System in the Development of Temperature Controller of Plastic Extruder
Authors: Xu Jia Lin , Zuo Guo Kun , Chen Jian Hua
Published: February 2011

In order to verify the performance of the designed temperature controller of the plastic extruder using supercritical CO2, we developed a Hardware-In-the-Loop (HIL) simulation system based on Matlab/Simulink RTW. In this platform, data transmission between real process and Matlab workshop was carried out by the data acquisition cards supported by xPC Target, so that the physical system was integrated to the simulation loop, and the system modeling, analysis, digital simulation and target downloading were all realized. The result showed that the designed temperature control algorithm had better effect when used in the plastic exturder production field. This HIL simulation system can shorten the development cycle and cost, improve the design level of the control system, and provide a solution to the demonstration of the controller in the real-time mode. What’s more, this simulation system can be applied in other process control fields as flow, pressure, etc.
Infinite AdaBoost and its Application on Fault Diagnosis for Analog Circuits
Authors: Wang He Xun , Liu Chong , Sun Yu Qing
Published: February 2011

AdaBoost algorithm can achieve better performance by averaging over the predictions of some weak hypotheses. To improve the power of classification ability of AdaBoost, an infinite ensemble learning framework based on the Support Vector Machine was formulated. The framework can output an infinite AdaBoost through embedding infinite hypotheses into a new kernel of Support Vector Machine. The stump kernel embodies infinite decision stumps. At last, the algorithm was used in fault diagnosis for analog circuits. Experimental results show that infinite AdaBoost with Support Vector Machine is superior than finite AdaBoost with the same base hypothesis set. The purpose of enhancing classification accuracy of AdaBoost algorithm is achieved.
Research on Automatic Booster Valve of Powered Props of Powered Supports
Authors: Jia Chun Qiang , Li Wei , Yu Ling
Published: February 2011

For the insufficient setting load of powered props of powered supports, an automatic booster valve, which can work continuously, is development by further analyzing the principle of automatic booster setting load system of powered supports. A simulation model is established based on AMESim ,and it is discussed that the internal relations between the efficiency ,pressure ratio and stroke of the automatic booster valve, the theoretical data and support are offered on solving the problem of insufficient and inhomogeneous setting force of powered support, it is shown that the automatic booster valve have the functions that lifting the leg by low pressure and mass flow and boosting automatically by high pressure and small flow,which can ensure the requirement on the setting load of powered supports, provide advantageous conditions for safety and efficiency in coal mine production.
Intelligent Design of Mechanism Kinematic Chains by Advanced Optimal Methods
Authors: Zhang Miao , Liao Ning Bo , Zhou Chen , Tao Xi
Published: February 2011

When using graph theory to conduct intelligent design for kinematic structure enumeration, the isomorphism identification of graphs is an important and complicated problem. In this paper, the methodology of transferring isomorphism identification into optimization issue was introduced. Then the recent development of applying advanced optimal methods for isomorphism identification was reviewed, the advantages and disadvantages of there methods were discussed.
Kinematics Analysis and Simulation of a New Type of Mechanical Excavator with Controllable Mechanism
Authors: Cai Gan Wei , Zhang Zhuan , Pan Yu Chen , Wu Du Chao , Xu Xi Yong
Published: February 2011

A new type of excavator is introduced in this paper aiming at solving the problems the hydraulic excavator and traditional mechanical excavator (also called Electric Shovel) have respectively, which are hydraulic leaks and high maintenance cost of the former one and the lack of flexibility of the latter one. The analysis of the proposed novel excavator is carried out including: Degree-of-Freedom (DOF) of the new mechanism by constraint screw theory, inverse kinematics using the method of constraint equations, velocities and acceleration. A simulation study is proposed based on the analysis above. Results show that: the new type of mechanical excavator has the ability to achieve flexible trajectory output within its workspace.
Research on a New Type of Device of Laminar Water Draining with No External Force
Authors: Li Qin , Li Fu Bao , Su Xing Ye
Published: February 2011

A new type of device of laminar water draining with no external force is proposed in this essay which established the physical and mathematical models of laminar water draining so as to make the oil-water mixture, in the use of different density under the laminar water, have different buoyancy in vertical direction to reach the separation of oil and water; at the same time, due to the design of the spring-loaded throttle control device, adjusting the flow rate to achieve laminar flow; using the fact that different densities of oil and water resulting different pressure, it formed the oil water interface pressure which provided power of water draining, and through float level static and dynamic state, it controlled solenoid valve opened and closed to achieve the automatic draining of water.
Study and Design of CAN Bus Node Based on MC912D60A Microcontroller in Automobile
Authors: Chen Ji Fei , Zhao Long Qing
Published: February 2011

Controller Area Network (CAN) is a kind of serial communication network that supports the distributed control and the real time control. The CAN have high performances and high reliabilities. It can solve many problems of complex circuitry, wiring harness increasing, operation reliability reducing and the difficulty of fault maintain increasing while using CAN Bus technology in automobile. In this paper, the form of CAN bus and node design method based on MC912D60A single chip microcomputer were studied and introduced. At last, the hardware design principle diagrams and software flow charts were given.
Remote Monitoring Technology on Oil of Large Equipment
Authors: Zhang Xue Song , Cui Jiang Hong
Published: February 2011

A remote monitoring system of lubricants based on GPRS is introduced. This system collect data from sensors which installed in oil duct by microprocessor, transmit the data to GPRS module, and send it out to the remote monitoring center by GPRS network. This system has the advantages of data wireless long-distance transmission, real-time, high reliability
Self-Sencing Control Research on a Linear Compressor
Authors: Zhang Li Qin , Peng Guo Hong , Zou Hui Ming , Tian Chang Qing
Published: February 2011

Compared to conventional compressors, the linear compressor with a free piston can improve efficiency and save energy, but the displacement varies due to different load conditions, which seriously influences its performance. In this paper, based on the theoretical analysis, a self-sensing control system with a SPWM inverter and a PC software interface for a moving-magnet linear compressor is developed, and the displacement of the linear compressor which is under control is tested. The result shows the error of the control system is under 0.2mm, and the accuracy fulfils the requirements.
Strain Transfer From the Host Structure to Optical Fiber Sensor
Authors: Her Shiuh Chuan , Tsai Chang Yu
Published: February 2011

Optical fiber sensors with light weight, small dimension and immunity to electromagnetic interference are considered as a superior structural health monitoring device. It is well known that the strain transfer from the host structure to the optical fiber sensor is dependent on the bonding characteristics such as adhesive layer, protective coating and host material. In this investigation, a theoretical model with three concentric cylinders represented optical fiber, protective coating, and host material, respectively, is proposed to determine the strain in the optical fiber sensor induced by the host structure. The theoretical predictions are validated with the numerical analysis using the finite element method. The effect of host material on the strain transferred is presented through a parametric study.
A Study on the Method of Rust Prevention of High-Strength Bolts for the Bridge Parrel
Authors: Wang Li Cun , Chen Jin , Li Shi Liu , Wang Xu Dong
Published: February 2011

For the parrel bolt of Egongyan Yangtze River Bridge uses rust-proof paint which can easily come off, workers should often examine cable and re-paint. Without repairing in time, bolt will be rusty in a short time, which causes serious problems. According to the present state of naked bolt of Egongyan Yangtze River Bridge, we investigate the corrosion action of high effective paint stripper and conduct an analytic experiment, using high effective paint to remove the paint of naked high-strength bolt and testing four engineering plastics in a high temperature and freezing temperature. Through a comparative analysis, we adopt MC-PA for protective cover and load it on the top for bolts, achieving a good protective effect.
The Design of Embedded Control System in Knee-Joint Rehabilitation Trainer Based on S3C2440
Authors: Li Xiao , Zhang Zhi Bin , Hong Xia
Published: February 2011

To improve the general performance of knee-joint rehabilitation trainer (KRT), an embedded control system for the KRT based on embedded linux OS was designed, taking 32bits processor S3C2440 as core control unit. The overall scheme, hardware and software architectures of the system were designed. The key technologies dealing with the embedded linux drivers and the applications based on QT were studied. Experimental results proved that the designed embedded control system is reliable, easy to handle, and can control the KRT to realize isokinetic continuous passive motion and isokinetic active resistance motion. This can provide the guidance for the design of embedded control system in similar medical devices.
Performance Test and Analysis of Clothing Materials
Authors: Yu Yao , Qian Xiao Ming
Published: February 2011

In this paper, we focus on the need for researching the performance of clothing materials. It chose the knitting fabric to be the object of study, and took the performance tests, which include basic performance, style, comfort and clothing comfort. After that, it analysis that these three variables— “fibers”, “yarn properties” and “fabric performance”— influence clothing thermal-wet comfort. The statistic analyses include one-way ANOVE, correlation analysis and principal component analysis. Based on the contrastive analysis of test results, it can be gain the effect of these three variables on clothing comfort.
Application of Neural Network and Particle Swarm Optimization Algorithm in Slope Runoff and Sediment Yield Calculation
Authors: Huang Jun , Wu Pu Te , Zhao Xi Ning , Wang Juan
Published: February 2011

Neural network black box model for predicting the slope runoff and sediment yield and two empirical equations for calculating the slope runoff and sediment yield were established with the basis of practical field data of slope runoff and sediment amount by artificial simulated rainfall experiments. In additional, particle swarm optimization algorithm is used to inquire the empirical equation’s unknown parameters based on least square method. And results show that, neural network model might represent the nonlinear relationship between runoff, sediment amount and each impact factor excellently. Furthermore, predicted results are satisfactory and its relative error mean is around 10%. Empirical equations are reasonably and reliable, its relative error mean is less than 20%. These two methods provide an operable means for such intricate research of slope runoff and sediment yield predication and calculation.
Inventory Control Policy of Service Parts under the Background of Service-Embedded Manufacturing
Authors: Wang Peng Peng , Ming Xin Guo , Zhang Dong , Li Dong , Wu Zhen Yong
Published: February 2011

This paper studied service parts inventory control policy of a large equipment manufacturer which is on the transformation to service-embedded manufacturing. In order to get win-win solution for both supplier and client, a new cooperation pattern of service parts management was proposed. And a service parts model of multi-echelon inventory system in the after-sale service market was build based on the analysis of service parts demand under servitizaion. Based on this model, many issues of service parts inventory management were studied. Finally the inventory control parameters were exploited which aims at the maximum profit of service parts inventory. With this method, the reduced inventory of suppliers and improved service level could be calculated quantitatively, which could work as a reference to set price of extensional services. Experiments showed the method proposed in this paper is valid for service-embedded manufacturing firms.
Optimization of Fermentation Process of Pear Vinegar by Response Surface Methodology
Authors: Gao Han , Xu Gui Fang , Fan Yuan Yuan , Nan Hai Juan , Fu Su Fang
Published: February 2011

The fermentation process of pear vinegar was optimized to maximize the amount of acetate in this study. A central composite design of response surface methodology involving inoculation rate, temperature, time was used, and second-order model for the amount of acetate was employed to generate the response surface. The optimum condition for the fermentation process was determined as follows: inoculation rate 8.65 %, temperature 30.17 °C, time 7.44 d. The obtained amount of acetate at the optimum condition was 9.53%.
A Low Dimensional Embedding Method for Combining Clusterings
Authors: Xu Sen , Zhou Tian , Yu Hua Long
Published: February 2011

Clustering combination has recently become a hotspot in machine learning, while its critical problem lies on how to combine multiple clusterings to yield a final superior result. In this paper, a low dimensional embedding method is proposed. It first obtains the low dimensional embeddings of hyperedges by performing spectral clustering algorithms and then obtains the low dimensional embeddings of objects indirectly by composition of mappings and finally performs K-means algorithm to cluster the objects according to their coordinates in the low dimensional space. Experimentally the proposed method is shown to perform well.
Study on Heavy Metal Adsorption in Coastal Sediment of the Yellow River Estuary
Authors: Wu Qian Qian , Ren Jia Guo
Published: February 2011

We took the surface sediments of the Yellow River as the objects to study the adsorption characteristics of Cu and Pb in coastal sediments. The results indicated that: the smaller the granularity is, the bigger the saturated adsorption capacity is; The adsorption equilibrium time of Cu2+, Pb2+is different, but all can achieve adsorption equilibrium in 1.5h; The adsorption capacity increases gradually along with pH, which increases rapidly for Cu2+, but increaseing slowly for Pb2+. The adsorption capacity of Cu2+assumes a linear relation with initial concentration of absorbent basically; which increases rapidly under lower initial concentration of absorbent for Pb2+, but then becomes lower. The adsorption capacity of Cu2+, Pb2+increases along with the equilibrium concentration, which increases rapidly for Cu2+, but increases rapidly for Pb2+when the equilibrium concentration is relatively lower, then tends to slow down along with the concentration.
Microwave Synthesis of Schiff-Base Complexes and Organic Tin
Authors: Deng Chao Yong , Lin Zhen Yan , Yang Mao Lin , Xu Ben Jun
Published: February 2011

Used seven different aldehyde besides salicylaldehyde, respectively, reacted with the amino acid in the ethanol ratio of 1:1 has prepared seven Schiff base;then used 2(2(4-chlorobenzeneyl) methyl)tin and 2(4-on cyanoacrylate benzylidene)2 chloride tin reacted with above seven Schiff base in anhydrous ethanol, has prepared a series of new organo tin (IV) Schiff base complexes . The synthesis process was used the new technology of microwave and all the compounds were characterized.
Study on Bore Cores Evaluation Systems of Asphalt Pavement
Authors: Zhao Yan , Ma Huan
Published: February 2011

The bore core method has used extensively in the field of asphalt pavement detection, maintains and final acceptance. Using the core’s evaluation index systems, the structural thickness, the disease range and the material grade of the road can be known and analyzed, as well as the attenuation of the key index of bitumen. The disease intensity of road surface and development trend in depth can be found out; the reason of the disease can be ascertained, through the compression strength, resisting and shearing mechanics indexes such as bonding strength, etc. Facts show that features in-depth analysis of bore core will help to identify causes of disease, and then adopt measures for improvement.
Research on Oil-Water Interfacial Properties Effect of Polymer / Surfactant Binary Flooding System
Authors: Wu Wen Xiang , Yu Zhong Qi
Published: February 2011

The formula of surfactant(QY-3、SHSA-HN6、SS) and polymer compound system, and the interfacial characteristics between oil and water of Henan oil field were evaluated, the binary composite system formula adapt to the field was explored. The results show that the binary composite system (surfactant QY-3 and polymer 1630S) and oil-water in Henan can achieve ultra-low interfacial tension(＜10-3mN/m); If the addition agent NaCl was added to the composite system (Surfactant Ss and polymer ZL-Ⅱ or Surfactant Ss and polymer KYPAM) that the interfacial tension between oil and water can be reduced effectively.
Finite Element Analysis Technique and its Application in Numerical Simulation of Knitted Fabric
Authors: Li Cui Yu , Wang Rui
Published: February 2011

The draping and buckling of knitted fabric is simulated based on the micro-mechanical constitutive model with full Lagrange finite element method under gravity load. The micro-constitutive model reveals the mechanical properties of fabric more elaborately, especially fabric has its own properties owing to its micro-knitted structure. In the finite element analysis, the knitted fabric sheet is discretized with 8-node shell elements and reduced-integration method is used. The simulated results are in good agreement with the experimental observations. The work provides a theoretical and technical basis for the development of the virtual trial system of garments.
Experimental Study of Hematite Melting Reduction under High Temperature
Authors: Nie Yi Miao , Niu Fu Sheng , Liu Shu Xian
Published: February 2011

For low-grade and fine disseminated grain size hematite, there is no good effect through traditional mineral separation. In this study, hematite will be smelted directly to separate quartz and hematite.The optimal technological condition is as: reduction time is 60 min, reduction temperature is 1550°C and alkalinity of slag should be controlled between 0.3~0.5 in order to get better slag to form glass ceramics.