bluuebunny/crossref_metadata_2025 huggingface dataset:
Finite Element Analysis of Deformation and Flow of Two-Way Cartridge Valve under Different Pressures
Authors: Liu Han Wu , Liu Jun Ming , Feng Fan
Published: April 2012

In the working process of the two way cartridge valve, deformation and stress are generated by the effect of the changed internal fluid pressures. In this process, the flow of the liquid flowing through the cross section also changes with it. To analyse the stress and deformation distributions of the cartridge valve under the different pressures and the flow analysis in different flow rates and different pressures, finite element method has been used in this paper for analysis and calculation in order to find the structure weak part, the instable flow rate region and the part which hinder the flow rate increased. The results show that: the phenomenon of stress concentration significantly existed in the opening part on the outlet side of the two-way cartridge valve. Under the maximum operating pressure (the maximum working pressure is 31.5 MPa, the maximum flow rate is 4500 L / min), the deformation was larger in the part of girdle. There was nearly no deformation on the upside of the valve body and the stress was less. So, the valve body was the redundant part of two-way cartridge valves. The instable flow rate region was located in the region of the two-way cartridge valve opening across. In the junction of the export of plug-in mounting component and the plug-in mounting block, the flow of liquid was impeded because of its much block and angular structure. The analysis results above have laid a theoretical foundation for the fatigue strength analysis and structural optimization of two-way cartridge valves.
The Stability of Premixed Flame on Water-Cooled Copper Slot
Authors: Xu Peng , Shi Yong Zheng , Yao Da Rong , Fu Zhong Cheng
Published: April 2012

Through experimental research on a new-style water-cooled copper burner, the critical width of natural gas for back-fire was determined between 1.5 and 2 mm, which was much smaller than the number given in general reference. The burner was applied on a condensing boiler upside down. The out-flame limits on copper slot, combusting normally and inversely, were determined. The out-flame limits combusting inversely are not quite different from the normal on and they are just little bigger. Within the range 0.6～5.0W/mm2 of thermal intensity of fire port, primary air ratios are in the extent of 1.6～1.4 at out-flame, which is suitable for small domestic gas burner.
Study on Vibration Absorption of New-Energy Autos Batteries’ Cooling Fan
Authors: Ren Jin Bo , Zhang Xiang , Hu Bing Le
Published: April 2012

This paper mainly talks about the structure of new-energy autos batteries’ cooling fan. It gives the reasons for vibration in theory. It also improved the structure of damping pads for vibration absorption by comparing vibration absorption effect of damping pads made of two different kinds of material. In the end, the better-effect structure and material for vibration absorption is selected after the experimental comparison. In addition, the assembly technique is advanced for fan, which left a notable alleviation of vibration.
Dislocations in Gan Grown on Silicon
Authors: Hao Qiu Yan , Xie Xin Jian , Liu Cai Chi , Zhao Li Wei
Published: April 2012

In order to understand dislocations in GaN grown on silicon using metal organic chemical vapor deposition (MOCVD), two samples with different film thickness were grown. The distribution of dislocations and its influence on epitaxial layer were studied. Wet etching can effectively reveal the dislocations in GaN, and the hexagonal etch pits are the emergence of dislocations. After etching in the aqueous KOH: H2O =3:20 (m:m), there are more pits with longer etch time. SEM shows that there are more hexagonal etch pits near the micro-cracks because many dislocations are induced by micro-cracks. In the experiment, ribbon slopes in the two sides of the pits are observed, and they are paralleled to each other. If the growth time prolonged, the ribbon slopes would disappear and the surface become flat, and this mechanism is discussed in this paper.
Study on the Influence of Manufacturing Defects on Coefficient of Thermal Expansion of Plain Weave C/SiC
Authors: Liu Jian Jun , Yao Lei Jiang , Li Bin , Tong Xiao Yan
Published: April 2012

The aim of this paper is to study the influence of manufacturing defects on coefficient of thermal expansion (CTE) of Plain Weave C/SiC by using the finite element computational micromechanics (FECM) method. Utilizing photomicrographs taken by scanning electron microscope (SEM), we established an accurate representative volume element (RVE) model for the plain weave C/SiC composites with consideration of manufacturing defects, which have different influence on CTE. The study shows that matrix cracks make CTE increase by 2.7% and matrix porosities make CTE decrease by 2.4% compared with the no defects RVE model. The variation law of CTE along with cracks density and porosity volume is also obtained: CTE of plain weave C/SiC is decreasing correspondingly while the speed gradually slows with the increasing of matrix crack density and matrix porosity volume fraction.
Fabricate Mould Insert with Conformal Cooling Channel Using Selective Laser Melting
Authors: Wang Li , Wei Qing Song , Xue Peng Ju , Shi Yu Sheng
Published: April 2012

Selective Laser Melting (SLM) technology can be used to fabricate plastic mould with complex conformal cooling channels directly and rapidly. In this paper, 316L stainless steel powders were used to produced a mould with an emphasis on attaining excellent mechanical properties.The precision, density and mechanical properties of parts were studied. Simulation and experimental results showed: the mould manufactured by SLM reveals good accuracy and performance, and the cooling efficiency of conformal cooling channels in mould has been greatly improved and the uniformity of cooling has been also upgraded.
Study on Dielectric Relaxation in BiFeO3/Bi3.25La0.75Ti3O12 Film
Authors: Wang Hui Xian , Zhu Wei Li , Li Li Ben , Chen Qing Dong
Published: April 2012

BiFeO3 (BFO) film is considered as relaxor ferroelectric film with a leakage current, and Bi3.25La0.75Ti3O12 (BLT) film is regarded as ferroelectric film with a leakage current. Maxwell- Wagner (M-W) theory has been used to study the dielectric relaxation behavior of BiFeO3 (BFO)/Bi3.25La0.75Ti3O12 (BLT) films grown on Pt/Ti/SiO2/Si substrate. Results show that the characteristics of BFO film significantly affect the dielectric relaxation behavior of the BFO/BLT film. The theoretical results agree well with the experimental data when the temperature is above 400K. It is inferred that the polycrystalline orientation of BFO film leads to the presence of disorganized polar nanoregions (PNRs) in BFO film. And BFO film exhibits relaxation characteristics at high temperatures.
The Modal Analysis of the Ceramic Ball’s Rolling Contact Fatigue Tester’s Drive Shaft
Authors: Zhou Jing Ling , Zuo Wei Ming , Li Yu Jing , Ren Yu Song , Zhu Wei Nan
Published: April 2012

The Modal Analysis of the Ceramic Ball Rolling Contact Fatigue Life Test Rig Drive Shaft Abstract: With the increasing of the rolling contact fatigue life tester’s speed, the vibration problem is getting more and more serious. In order to optimize the dynamic performance test rig, the modal analysis of the drive shaft was carried. First the vibration mechanics model was got by simplifying the shaft and get the first order of horizontal natural frequency which is 787.4266Hz with the theoretic algorithm. Then the drive shaft’s modal analysis was made by using the finite element software and that is 779Hz. The relative error between the former and the latter is 1.1%. It has demonstrated the accuracy of the finite element result, and its modal analysis could be the basis of the dynamic optimization.
Application and Management of Modular Fixture Parts Library Based on SolidWorks
Authors: Lu Gui Ping , Wang Li Tao , Lu Shan
Published: April 2012

According to the characteristics of fixture, a method is introduced to develop a modular fixture parts library by using visual programming language VC + +, SolidWorks API interface and configuration technology. First of all, the modular fixture Library has been established through the configuration technology of driving parameters. Secondly, it is programmed to generate a pop-up menu and SolidWorks plug-ins to achieve the module fixture parts call. At the same time, management and utilization of the modular fixture Library is completed, providing users with rapid fixture design based on 3D modeling environment, and contributing to the promotion and application of CAD technology in the machine tool industry
Research of Test Method for the Bogie Rotary Torque
Authors: Wang Xiu Gang , Qiu Hai Bing , Su Jian , Cao Xiao Ning , Wang Heng Gang
Published: April 2012

Rotary torque is one of the important parameters of the bogie. A scheme of the rotary torque test for the bogie was put forward, and the homogeneous matrix based on the Euler angle was introduced, the model of inverse pose of the slewing platform was built. Also, it implemented the real-time solution by means of simulink, and fitted the curve of hydraulic cylinder expansion amount and time by use of the MATLAB curve fitting toolbox. The method that took the motion curves of the actuators as the control input is put forward, which was of great value and laid the foundation for the test of rotary torque.
Research of Test Method for the Natural Vibration Frequency of Bogie
Authors: Wang Xiu Gang , Ji Zheng , Su Jian , Cao Xiao Ning , Li Meng Meng
Published: April 2012

In order to determine the，a test bench for the natural vibration characteristics of the bogie suspension was put forward. Firstly the natural vibration characteristics structure composition and the testing principle was introduced, the sine sweep incentive was simulated, and the inverse kinematics solution model and the real-time solution model were developed. The Comparison of the simulation result and the geometric theory results was carried out, proving the accuracy of the inverse kinematics solution model and the simulation model.
Numerical Study on the Spectrum Control Based on the Chaos Synchronization Technology
Authors: Liu Yong , Sun Jiong , Lou Jing Jun
Published: April 2012

The response spectrum of the nonlinear vibration isolation system under harmonic excitation is a continuous one when chaos occurs. This feature is utilized to eliminate or reduce the line spectrum in the radiated noise of the marine vessel. A nonlinear feedback controller was designed with the active control synchronization technology, and the projective chaos synchronization (PCS) was realized with different chaotic driving system. Simulation results show that the spectrum can be attenuated greatly through changing the ratio factor.
The Applied Analysis of Virtual Technology in Modern Manufacturing Industry
Authors: Liao Mei Hong
Published: April 2012

Virtual mechanical manufacturing technology refers to a simulation technology for the mechanical manufacturing process whose objectives are to reduce the production cost and increase the production efficiency. This paper is intended to probe into the practical applications of computer virtual manufacturing technology in modern manufacturing industry combining with the latest development in the virtual mechanical manufacturing technology.
Influence of Material Properties on Modal Characteristics for Fluid-Structure Coupled Vibration System
Authors: Zhu Lin , Zhu Chun Yan , Xu De Yuan , Tang Guo An
Published: April 2012

The analysis processing for the linear coupled vibration of a flume and its inner fluid often uses FEM method. An equation set which contained the fluid node pressure and the structure node displacement is formed, based on this equation, reduction form and symmetry form is used to get the same modal frequency. Computers can calculate out the frequency more rapidly by a smaller control equation. According to the frequency comparison of different fluid-structure coupled vibration system with different materials, this paper draws some conclusions on the influence of material properties on modal characteristics for fluid-structure coupled vibration system. It can give a reference to select the material in practical engineer.
Seismic Response Analysis of Container Crane
Authors: Lu Shi Qing , Xiao Han Bin , Deng Ping
Published: April 2012

Earthquakes pose a threat to large-scale container cranes. Previous earthquakes damaged many container cranes, which had a significant impact on business interruption losses of the port. In this paper, a container crane’s seismic response is analyzed in ANSYS. First, a finite element model of a container crane is developed. Then, based on the equations of structural dynamics, the four most important modes of the container crane are extracted. Finally, a time history analysis is conducted to obtain the displacements of some critical nodes on the crane model under the excitation of an earthquake wave. The result of this paper provides a reference for the seismic design of container cranes.
Study on the Combination of Multilayer Piezoelectric Seismometer
Authors: Xing Ya Min , Liu Sheng Hu
Published: April 2012

The key problem on seismic exploration is how to improve accuracy and resolution, A kind of multilayer 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 advantages over conventional geophones in frequency spectrum, resolution and high-frequency response, it is one better detection method, and the upgrade product of traditional geophone.
Application Analysis of the Fuel Viscosity and Temperature Control System Based on the Sliding Mode Theory
Authors: Liu Zhuan Zhao , Chang De Shang , Liu Xin Jian
Published: April 2012

With the shortage of the petroleum resources day by day, the fuel oil price is becoming higher and higher. The ship companies want to use the heavy diesel oil and inferior fuel with lower price for the marine diesel. Temperature is a variable with great inertia. Using the PID control algorithm, which will lead to the consequence of over correction in the controlling process, the advantage of sliding mode variable structure control is the small over correction. In this paper, based on thermodynamics and heat transfer theory, the mathematical model of temperature control system is built, the sliding mode movement equation and the sliding mode variable structure controller is obtained. This makes the application of temperature control take the advantage of sliding mode variable structure control.
Analysis of Permethrin in Cole by Dispersive Solid Phase Extraction
Authors: Qiao Feng Xia , Wang Meng Ge
Published: April 2012

A new dispersive solid phase extraction (DSPE) method coupled with GC detection was established for determination of permethrin residue in cole. The proposed DSPE method was carried out using acetonitrile as the extraction solvent, and neutral alumina oxide as dispersive adsorbent. The factors that affected DSPE efficiency were validated in terms of extraction solvent, extraction time, and dispersive adsorbent kinds and interaction time. The developed method could give satisfactory recovery (91.2–107.4%) with RSD≤4.9%. Good linearity was observed in the range of 0.005-1.19 mg/g with the correlation coefficients (r2) of 0.9992. The detection limits for permethrin was of 0.43 μg/g. The method had been successfully applied to the analysis of permethrin esidues in cole samples.
48″600lb Full-Welded Ball Valve Ultimate Bearing Capacity Optimal Design
Authors: Mo Chun Li , Du Shou Peng , Tang Xing Wei
Published: April 2012

Fully-welded ball valve has been applied in large oil and gas pipelines, and its quality is directly related to the safety of the transportation of national energy. The wall thickness of 48″600lb ball valve is greater than theoretical design thickness. In this article, FEM software was used to design ultimate bearing pressure using linear stress analysis method. By applying different inner pressure load, the stress distribution of the ball valve was studied. Stress verification lines were draw at stress maximum location and each stress item were checked under corresponding safe value. Optical design obtained maximum inner pressure can provide theoretical support for practical engineering application
Application of Transient Rayleigh Wave for Highway Testing of Compaction Grouting in Subgrade Reinforcement
Authors: Xu Wei , Du Shao Wen , Wang Xuan Cang
Published: April 2012

The paper, based on expressway cases of foundations reinforcement by compaction grouting, presents the results of comparative test among the different traditional engineering method, including soil test, in-situ test, deflection test. It is proved that the application of transient Rayleigh wave(TRW) technology will greatly improve the efficiency of highway surveys, with advantages of high-efficiency, wide –use, non-destructivity and reliability.
Calibration of Large Scale Coordinate Measuring System Based on Scanning Laser Plane
Authors: Lao Da Bao , Zhou Wei Hu , Zhang Zi Li , Yang Xue You , Zhu Ji Gui
Published: April 2012

To overcome the disadvantages of existing large-scale coordinate measurement systems about low level of automation and poor parallelism, this paper introduces a novel system which characters multi-sensor measuring network, while a single sensor measures angle via a couple of non-parallel planar laser beams rotating around a fixed shaft. The novel method for measuring angle improves automation in large-scale coordinate measurement. Furthermore, measuring network assures that measurement accuracy keeps to the same level even when the measuring range is enlarged. Measurement model and calibration are the key technologies of the system. They are the main sources of measuring errors. Therefore, to minimize the error, a practical global calibration method for the multi-sensor network system is proposed, with constructing a precise mathematical model. In this model, the parameters of the system are divided to inner and outer parts. While the inner parameters are obtained by aided instrument, the outer which means transform parameters between different sensors are figured out in spot calibration. Finally, the objective function based on transform coefficients between different sensor coordinate systems is defined and the outer parameters are optimized by bundle adjustment method. Thus, the whole system can finish global calibration by one time，and no medi-coordinate-frame is needed．Therewith，transformation time of coordinate frame decreases and calibration process is facilitated. Finally，measurement experiments are conducted with root mean square(RMS) error of not more than 0.1 mm.
A Simple Wireless Mesh Network for Auto Meter Reading
Authors: Zeng Xin , Yu Shi Kun
Published: April 2012

There is strong interest in a robust lower power wireless solution for utility meter reading, especially for reading electricity meters. This paper describes a mesh network that is relatively simple to implement and takes up less resources than well known alternatives such as Zigbee.
Arterial Stiffness Index Measurement Based on the Oscillometry
Authors: Zhou Nan Quan
Published: April 2012

Arterial stiffness is a very important physical parameter and the measurement to it is very important in clinic. This paper describes the principle and arithmetic of arterial stiffness index. The measuring algorithm based on oscillometric method is also discussed. The algorithm proves effective and reliable through the analysis of many cases and doing lots of clinical tests, it has been developed software under LabVIEW7.0 and applied in the hospital. Furthermore, it can give the information of the measurer’s arterial stiffness and provide reference to doctor to determine the measurer’s cirrhosis level.
Design and Fabrication of Vibration Measurement Device for Completion Tubing Strings in High Pressure Gas Well
Authors: Zhang Fu Xiang , Ji Xiao Hong , Yang Xiang Tong , Dou Yi Hua
Published: April 2012

The vibration of completion tubing strings and mechanical analysis were not accurately verified by field experiment because of the limited downhole space and the difficulty of downhole measurement. So vibration measurement device for completion tubing strings was designed and fabricated. The device was fixed in thousands of meters downhole with tubing strings. The vibration data of the tubing strings was recorded in the well testing process and compared with the theoretical calculation result to perfect the theory research and analysis results. The device design referred to downhole electronic pressure gauge and other downhole tools and was proved to meet design requirements by laboratory experiments and field. Through the device of the built-in accelerometer measuring string vibration acceleration, the vibration state of completion tubing strings were known and vibration frequency of tubing strings were estimated. Vibration state was proved to exist in completion tubing string of high pressure gas well by field testing
Design of Mine Production Safety Monitoring System
Authors: Wang Yan Kun , Shi Yun Xu , Fan Hong Mei
Published: April 2012

The mine safety monitoring system is a set of sensor technology, electronics technology, power electronics technology, computer technology, wireless communication and network technology in one of China's leading multi-functional computer network systems, including underground, Inoue environment and equipment the detection of network systems and the Inoue monitoring data processing system. Environment and equipment for testing network system to achieve underground, of Inoue environment physical monitoring and control; monitoring data processing system is a comprehensive treatment of the collected data in order to achieve the sub-station set up and control equipment or detection sensors, through LAN detection information sharing, may constitute the enterprise information system.
The Design of the Network Weighing Monitoring System Based on Embedded Controller
Authors: Zhou Geng Lie , Hu Chi Bing , Wang Ya Zhou
Published: April 2012

The functions and the characteristics of RS-485 bus, I-7188 embedded controller, and SK2001 intellectual weighting controller are introduced briefly in this paper. The communication protocol of weighing controller, design of system hardware and software, and implementation of communication function are also analyzed in detail here. The serial communication between I-7188 and multiple weighing controllers has been implemented by using RS-485. As a result, the centralized control of the distributed equipments, the acquisition and automation upload of the metering data have been accomplished. The results of practical application show that this system has the characteristic of high stability and tolerance; it is easy to be managed and expanded as well.
Design of the Automated Packaging Systems with the Phthalic Anhydride Products
Authors: Yang Hui Jun , Guan Wei Guo
Published: April 2012

This study focuses on the automated packaging systems of the Phthalic anhydride made up of the PLC of Siemens S7-200 series and the weighing instruments, the sensor is mainly used to complete the Phthalic anhydride product weighing, bagging, sealing, and other functions, and The field text display , the configuration software of PC is used to display real-time monitoring interface. The weighing, bagging, sealing and other functions of the Phthalic anhydride product is completed mainly. The coarse and fine spiral motor is used to ensure system accuracy in the entire Control of the packaging process, the Phthalic anhydride product quickly and accurately weighing can be completed in this design. The application of the photoelectric sensor control the sewing machine start and stop of the sealed packaging process fast and accurate; Combination of TD400C and SIMATIC WinCC configuration software provides the packaging system fine human-computer interface.
Long-Distance Methanol Monitoring System Based on GSM
Authors: Jiang Xiao Mei , Rui Yan Nian
Published: April 2012

This thesis introduces long-distance methanol monitoring system through catalytic combustion, describing its hardware structure and software module, achieving dynamic display of data, analysis, remote control and data management. It is an effective mode to use GSM network as information transport platform for wireless monitoring system, with advantages of simple principle, high security, wide spread and so on, valuing important in practical use
Transmission Design of the Ultrasonic Flow Measurement Based on the Correlation Method
Authors: Xu Hui , Yan Zeng Tian , Wang Yang , Gao Song Wei
Published: April 2012

In design of ultrasonic flow measurement, the reproducibility of constant amplitude periodic signal will lead to a not unique time difference based on the correlation method. The aim of this paper is to design a set of amplitude modulation transmitting signal to solve the multiple values calculation of the time difference. The frequency characteristics of ultrasonic probe and the amplitude frequency characteristic of different duty cycle square wave are researched and tested. We cleverly combine the logic device FPGA with the property of the ultrasonic probe to achieve the amplitude modulation waveform in the circuit design. The experimental results show that FET switch controlled by the logic device FPGA can transmit amplitude modulation signal. The measured error of time difference after correlation is not more than 1.62s.
Realization of Miniature Air Data System Based on Silicon Micro Pressure Sensor
Authors: Chang Li Min , Yu Xiang Bin , Zhang Li Jing
Published: April 2012

In this paper, miniature air data system is designed based on thermally excited resonant silicon micro structural pressure sensor. The system employs thermally excited resonant silicon micro structural pressure sensor for the pressure measurement. Using miniature embedded computer, calculation of the parameters such as height, airspeed and mach number and real-time display by LCD are realized. The volume and weight of this system is only one-twelfth of the original. In addition, it has the characteristics of high accuracy, high resolution, high stability and repeatability.
Sensor Deployment Optimization Based on Simulation of Gas Distribution in Underground Fully Mechanized Coal Face
Authors: Ma Feng Ying
Published: April 2012

The gas sensor is very important for coalmine production safety. The Fluent software was used to simulate underground gas distribution. Geometry model was established and divided by grids. Gas distribution in fully mechanized coal face was simulated using RNG k-ε model according to conversation equation in turbulent state, turbulent kinetic energy equation and turbulent dissipation rate equation. The results show that gas is likely to accumulate in the upper corner, when wind passes through the corner after washing fully mechanized coal face, wind velocity is unstable, performance of sensor placed in inner side of turning is different from that placed in outer side of turning. The result shows that gas can be monitored effectively with this method which has an important value and instructive significance.
Fault Detection Filter for Markov Jump Systems
Authors: Ding Yu Cai , Zhu Hong , Zhong Shou Ming , Zhang Yu Ping
Published: April 2012

This paper deals with the problem of fault detection for Markov jump systems (MJSs) with time-varying delays and partly unknown transition probabilities. The aim of this paper is to design a fault detection filter such that the filtering error system is stochastically asymptotically stable with an attenuation level. By using the Lyapunov-Krasovskii functional, a sufficient condition for the existence of the desired fault detection filter is formulated in terms of linear matrix inequalities. A numerical example is given to illustrate the effectiveness of the proposed main results.
Which Parameters Should Be Used to Represent a Typical Breath Flow
Authors: He Zhong Hai , Du Yi Hao , Ma Zhen He
Published: April 2012

There are many parameters that be used to represent typical breath flow, mainly divided into three types: one is temporal, the second is frequency, and the last is pressure driven model. The temporal parameters include breath period, tidal volume, inspiration expiration ratio, and functional residual volume, to name a few. The frequency parameters mainly include every harmonic content variation. The pressure driven model use mechanical parameters to calculate flow. All the methods above have one common disadvantage: they do not take variation into account. We proposed here that the fourth type parameter should be also used to describe flow pattern, namely fractal parameter, fractal dimension of breath flow signal. The necessity and advantage of the fractal parameter is elucidated. The fractal dimension parameter is optional because of its stability compared with other parameters.
A New Design Method for Converting Wave Energy to Electricity
Authors: Lou Bao Dong , Zhao Xiao Jiang , Gao Jiao Rong , Yang Zhi Yong , Zhang Yu Quan , Huang Hao
Published: April 2012

Sustainable energy generation is becoming increasingly important. Our oceans are largely an untapped source of energy. This paper presents an innovative design method for converting the linear motion of ocean waves into electricity energy. The design principle and the construction details have been presented.
The Faults Analysis of HPTACCV Fuel Leakage on CFM56-5B Engine
Authors: Ao Liang Zhong
Published: April 2012

The high pressure turbine clearance control valve (HPTACCV) fuel leakage on CFM56-5B engine can cause some flight delays and cancellations. The basic structure of HPTACCV is introduced. The root cause of the fuel leakage is given. In the field, to provide a more reliable engine, Weibull Analysis can be used to determine the soft time. This paper presents how to use Weibull Distribution to calculate the soft time life and forecast the spare parts equipments. This method can be used to evaluate the other failures of the aero engine components.
Testing System Development of Outdoor Fitness Equipment
Authors: Zhang Fan , Wang Tian Jie
Published: April 2012

A testing system for the outdoor fitness equipment has been developed, which conforms to the new national standard. It can be applied to fatigue performance test, stability test and impact deformation test. Using Omron CPM2A PLC, the system guarantees industrial-level reliability. Measurement data is acquired and subsequently transmitted to PC via Host Link protocol. Developed in C#, the monitoring program applies a dedicated measurement thread. Attention has been paid to the assignment of PLC data memory. Therefore improved performance in speed can be achieved.
Yaw-Angle Control Channel of Subminiature Unmanned Helicopter Based on ADRC
Authors: Wang Hao , Peng Yan , Wu Wei Qing
Published: April 2012

In this paper ADRC algorithm is introduced to design the yaw-angle channel controller of subminiature unmanned helicopter. The original system is extended to a new system with an augmented variable. This approach can realize perfect tracking performance as well as robustness and stability without the exact mathematical model of the system. The simulation results further demonstrate the superiority of the proposed algorithm.
The Design of Welding Control System for Intersection of T-Tube's Seam Welding Based on the Multi-Axis
Authors: Liu Hong Sheng , Zhou Jian Ping , Xu Yan
Published: April 2012

To improve the quality and efficiency of T-shaped pipe welding, a double-gun welding CNC is designed based on Multi-axis Control. The control program using Delphi software can accomplish system management and control functions. This system could display current status of each axis in real-time, complete automatic fault diagnosis, modify the welding parameters and so on.
Research on the Supplementary Analysis System Based on CPS Standard
Authors: Tao Hua Ting , Ji Li Li
Published: April 2012

CPS test standard has put forward new demands to the management of power grids. This paper analyzes the main influence factors of CPS, and introduces the way of building data warehouse and constructing supplementary analysis system on this basis, which can effectively help power grid workers to research the pros and cons in dispatch and operation. The application of the supplementary analysis system is helpful for Shanghai power grid to enhance AGC control and frequency control ability under the control performance standard.
Embedded Multi-Parameter Monitoring System for Submersible Electric Pump
Authors: Liu Fei , Li Qiang
Published: April 2012

The multi-parameter measurement of submersible electric pump is an important part of monitoring data underground. The system measures the temperature, pressure, leakage current and vibration signals, which return through the power line carrier technology and data processing on the oil well. This article also focuses on the pressure sensor temperature compensation algorithm, using an anti-linear curve fitting to approximating, and effectively eliminates the error of silicon pressure sensor resulting from temperature changing. The system has brought about a striking effect in experiments of oil field.
The Application of TeeChart Control in UHV DC Converter Switch Test System
Authors: Wang Tian Cheng , Zheng Jian Feng , Wang Hong Yuan
Published: April 2012

With the development of component technology, there are many powerful third party components. TeeChart control as one of them was widely used for waveform display and processing. Combining the software development of multi-channel waveform analysis, this paper introduces the characteristics and attributes method of TeeChart control. With using the control, it can realize graphical display of keeping historical data, contrast analyze of the multiple wave etc. And the waveform can be saved as picture or PDF format. Be given the correlation realization code in the Delphi 7.0 development environment.
The Photoelectric Detection System Design of Conductive Film Loophole
Authors: Huang Kun
Published: April 2012

Based on the problem of conductive film loophole detection, this paper presents the overall system design plan, design a set of practical photoelectric detection system. The system hardware include photoelectric sensor module, signal conditioning module, MCU minimize system module, control module, alarm module, power supply module; System software flow chart are given. Finally, after making of objects, installation, debugging, software and hardware modified, the system achieve the design requirements, realize the design function.
Research and Development of the Generation Method of Clothing Process Diagram Based on CAPP Integration System
Authors: Yang Li Na
Published: April 2012

Modern clothing products have diverse styles changing rapidly and complex processing techniques. They are greatly affected by artificial factor and the equipment conditions are differential. In consideration of these characteristics of the products,Based on the design of the clothing manufacturing craft, this thesis develops a generation method of clothing manufacturing process diagram based on interaction to search for the technical method of accelerating the automatic integrated system progress of the clothing manufacturing craft. Since clothing manufacturing process diagram is an important element of clothing process planning, the generation of process diagram is indispensable in the craft design software. CAPP (Computer Aided Process Planning) refers to the decision of the industrial clothing processing craft by clothing parts making use of the functions of numerical calculation, logic and reasoning and etc. of the computer and with the aid of computer hardware and software technology and support environment [1].
The Green Manufacturing - The Development Trend of Machinery Manufacturing Industry in the 21st Century
Authors: Huang Yan
Published: April 2012

Green manufacturing is a strategy of sustainable development of human society in the modern manufacturing. This paper explored the meaning of green manufacturing, analysed the status and prospects of green manufacturing development, green manufacturing, and green design, cleaned production, green materials, green packaging and green recycling technology, and believe that the machinery of the 21st century is greenmanufacturing.
Adsorption and Removal of Congo Red Dye from Aqueous Solution by Using Nano-Fe3O4
Authors: Tang Zhu Xing , Chen Yin , Xue Jun , Yue Shuang
Published: April 2012

In this paper, nano-Fe3O4 as sorbent was used to remove Congo red dye from aqueous solution, in order to investigate its adsorption properties. Fe3O4 nano-particles were synthesized by hydrothermal method, and were characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and X-ray Powder Diffraction (XRD) to examine their size, morphology and property. The adsorption and removal of Congo red dye from aqueous solution on nano-Fe3O4 was studied in batch equilibrium experiments. These results showed an excellent adsorption capability for Congo red with a maximum adsorption capacity of 1395mg•g-1 at 20°C and pH2.0. It indicates that Fe3O4 nano-particles can be effectively used to remove color from wastewater containing dyes.
Based on Immune Genetic Algorithm of Alloy Heat Research
Authors: Zhang Shu , Meng Lei
Published: April 2012

In this paper single crystal alloys [111] orientation on tensile stress creep performance testing and organization was observed, on the high temperature and low stress conditions, combining with the creep characteristics of SEM observation, organizational morphology constructed raft shape g in 3d space ordered phase mode of existence of; Study the single crystal alloys [111] orientation in high-temperature creep of tensile stress during directional coarsening regularity, and using the finite element method, this paper analyzes the monocrystal [111] orientation in ni-based alloy cubic / two-phase interface von Mises stress distribution and the lattice strain energy change rule, through the immune genetic algorithm analysis [111] orientation of single crystal alloy phase of evolution rule ordered .
Study on the Function of Steel Tube Concrete in the Fire Prevention
Authors: Zhu De Sheng , Lei Shi
Published: April 2012

Using circumferential constraint action of steel tube to concrete, steel tube concrete makes concrete be in the condition of three-dimensional pressure, to increase the strength of concrete and enhance the plastic performance. Due to the existence of the concrete could prevent or delay the steel tube from crippling, it makes steel tube material performance can be fulfilled. Steel tube concrete can not only make up two materials their shortcomings, but also give full play to the advantages of both. With high bearing capacity, good plasticity, convenience to construction and good refractory performance, and many other advantages, steel tube concrete make the loss in the fire reduced, and play a certain role in fire prevention and mitigation
Study on Material of Computer Aluminum-Magnesium Alloy Casing
Authors: Liao Mei Hong
Published: April 2012

When the field of the hospital physical examination has entered the computerized era, people can use computers to store large amounts of physical examination information, greatly improving the efficiency of physical examination. However, with more and more examination items, it will bring about some bias if the doctors give physical examination findings for participants by subjective analysis, so the use of advanced software analysis technology is needed to help analyze and retrieve physical examination information. This paper mainly discusses the application of the Agent technology in the analysis of physical examination information.
Synthesis and Characterization of Cobalt Nanoparticles by Cobalt-Acetate
Authors: Yang Xia , Shao Hui Ping
Published: April 2012

In this study, cobalt nanoparticles with an average size of 16 nm were synthesized using cobalt-acetate as precursor. Besides oleylamine and oleic acid, sodium oleate was selected as surfactants to control the size of particles. The obtained particles show cubic shape and uniformly disperse. The hysteresis curve of cubic nanoparticles detected by vibrating sample magnetometer (VSM) reveals that the coercive force Hc is 297.62 Oe and the saturation magnetization Ms is 56.55 emu/g.
An Overview of the Sheet Metal CNC Incremental Forming Toolpath Generation
Authors: Zhu Hu , Lin Wen Wen , Bai Jin Lan
Published: April 2012

The sheet metal CNC incremental forming is a flexible dieless forming technology that forms a sheet part by extruding the sheet metal point by point with the movement of forming tool along the forming path. The tool paths therefore have a great effect on the dimensional accuracy, surface quality and forming time. In this paper, an overview of the research status about the forming tool path generation for sheet metal CNC incremental forming is presented briefly.
Fabrication and Study of P-Type ZnO Films by RF Magnetron Sputtering of ZnO: In2O3 Powder Together with the N-Implantation
Authors: Nan Mao , Kong Chun Yang , Qin Guo Ping , Ruan Hai Bo
Published: April 2012

The N-In codoped p-type ZnO films with preferential orientation along (002) plane have been fabricated on quartz glass substrates using radio frequency magnetron sputtering technique of ZnO:In2O3 powder target combining with N-implantation. The samples annealed at 700°C deserved the optimal properties, the best of which exhibits electrical characteristics with the hole concentration of 4.04×1018 cm-3, the lowest resistivity of 1.15 Ωcm and Hall mobility of about 1.35 cm2V-1s-1. The effects of post-annealing on the microstructure and electronic properties of the codoped ZnO films is analyzed via SEM, XRD, XPS and Hall measurements system, and the trend of carrier concentration with annealing time is discussed theoretically.
Film Morphology and Film-Forming Ability of Supramolecular Compound Self-Assembled with Amino Polysiloxane Emulsion and Carboxyl Polysiloxane Emulsion
Authors: Huang Liang Xian , An Qiu Feng , Men Jing , Wang Qian Jin
Published: April 2012

Using cation amino polysiloxane emulsion(ASE) and anion carboxyl polysiloxane emulsion (CSE) as materials, mixing ASE and CSE together to self-assemble or aggregate by electrostatic interaction, supramolecular compound emulsion (ASE-CSE) was formed. TEM and particle size analyzer observation showed that the particle of ASE-CSE is sphericity, and its particle diameter is bigger than that of mono-composition emulsion and has single-peak distribution. SEM, atomic force microscope (AFM) and other instruments detections indicated that the ASE-CSE possesses good form-film property. The ASE-CSE film on the silicon wafer is very rough. There are many islands or peaks package on the film surface. The average thickness of the film is 12.45nm, and it is about 7.1 times as against ASE. With the ASE-CSE film, the stripes or grooves on the fiber surface is weakened or disappeared. And the surface is smoother than that of the control sample. In addition, the contact angle of the cotton fabric treated by ASE-CSE is 86.5°. This reveals that the ASE-CSE film brings fiber fabric from hydrophile to hydrophobe.
Measurement of SiC Particle Size Based on Ultrasonic Attenuation Spectrum
Authors: Fan Ying Yuan , Qiu Zhao Yun , Li Shu Wei , Liu Fa Ming
Published: April 2012

To compare the different effects under different excitation methods during the measurement on the particle size of silicon carbide (SiC), an experimental system has been established to get different signal excitations of burst wave, continuous wave and pulsed wave. Variable sound path method is adopted during the measurement to obtain the ultrasonic attenuation spectrum of SiC suspensions with two immersion transducers at four different mass concentrations under the same experimental condition. It is found that the ultrasonic attenuation coefficients excited by three different waves increase with increasing frequency and the tendency is approaching the same. The result calculated by a normalized spectrum of the optimal regularization methods shows that SiC particle size distribution under the three excitation methods is similar, which indicate that the different excitation methods on particle size characterization have almost no influence to result.
Solidification Path Calculations of Al-Cu-Si Alloys in Al-Rich Corner
Authors: Zhao Wei Guang , Ye Xi Cong , Liu Wen Jun , Gu Ming Chun
Published: April 2012

The solidification path of Al-Cu-Si alloys in the Al-rich corner are investigated. The thermodynamic data needed in the calculation are obtained by direct coupling with the CALPHAD software Thermo-Calc. A paralell experimental investigation is conducted to validate the prediction results. The calculated results show that, the sensitivity of the variations in the solidification paths to the cooling rates are depended on the distance of the initial compositions from the binary eutectic troughs or the ternary eutectic point. Reasonable agreements are observed between the predicted amounts of θ-phase and the measured results.
Studies on the Microstructure and Properties of TiO2/(Ag) Thin Films
Authors: Gao Fei , Liu Xiao Yan , Zheng Li Yun , Li Mei Xia , Jiang Rui Jiao
Published: April 2012

TiO2/(Ag) thin films were prepared by DC magnetron sputtering. The effects of Ag-doping on the microstructure and properties were compared studied by atomic force microscopy (AFM), X-ray diffraction (XRD), UV-Vis spectra and photocatalysis tesing, respectively. The results show that when doped with Ag, the surface of TiO2 thin film was improved and the growth of anatase phase was promoted. The absoption properties of Ag-doped TiO2 thin film was enhanced dramatically compared with that of TiO2 thin film. And the photocatalysis properties of Ag-doped TiO2 thin film was increased twice as well.
The Study on TiAl Based Alloy Blade Casting Structure by Bottom Pouring Vacuum Casting
Authors: Ye Xi Cong , Zhao Wei Guang , Liu Wen Jun , Tang Shuang Qing , Fang Zi Fan
Published: April 2012

In this paper, the bottom pouring vacuum suction casting is used, and the TiAl-based alloy blade with a certain flexivity, the brim thickness 1.5mm, and the blade Falcon with high 8mm, width 10mm, length 27mm was obtained. The structures of this blade are studied. The grain sizes are different from bottom to top, in bottom position, the blade leaves structure have the equiaxed, and the central part have the columnar crystals. The TiAl-based alloy structures have fully lamellar. Comparing with different position structures, the bottom position TiAl based alloy structure have the least lamellar space, is about 0.13μm; the average space of top lamellar structure is about 0.38μm; the central region of the lamellar spacing slightly larger than the bottom area.
Microstructural Evolution of In Situ (Fe,Cr)7C3 Particles Reinforced Iron Matrix Composites
Authors: Niu Li Bin , Tian Jing Lai , Wang Xiao Gang
Published: April 2012

A kind of (Fe,Cr)7C3particles reinforced iron matrix composite was prepared by metallurgical bonding between Cr wires and gray cast iron at 1200°C with subsequent heat treatment. The obtained composites were comparatively characterized by XRD, SEM and microhardness tests. The results showed that the composites mainly consisted of α-Fe matrix and the reinforcements of particle bundles, which include (Fe,Cr)7C3 carbides and γ-Fe. The cross-section of the reinforcements gradually increase with heat treatment time, and the microstructures change from eutectic to hypoeutectic, the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics.