bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization of Process Parameters in Spark Plasma Sintering Al6061 and Al2124 Aluminum Alloys
Authors: Khalil Abdullah , Hakeem Abbas , Saheb Nouari
Published: September 2011

In the present study, Al2124 and Al6061 alloys were consolidated through spark plasma sintering at 400, 450 and 500 °C using three different combinations of pressure and time (35 MPa - 20 min, 40 MPa - 15 min and 45 MPa - 10 min). The microstructure, density and hardness of sintered samples were evaluated. Full densification and the highest hardness were obtained at 450 °C. Beyond 450 °C, there was only small change of hardness. Densification of specimens was less sensitive to the applied pressure. However, the lowest pressure of 35 MPa led to the highest hardness. At higher temperatures, the increase in pressure resulted in grain growth which decreased the hardness.
Microstructures Finite Element Simulation of Laser Cladding Layer Regulated by Micro-Forging
Authors: Zhou Ju , Qiu Chang Jun , Cheng Xi Yang
Published: September 2011

In the whole process of micro-forging regulation laser cladding layer, the microstructure structure of cladding layer would change. In order to establish the microstructure evolution of the whole process, firstly re-crystallization model was set up based on Avrami equation and experimental data, and various material constants were gained with regress; secondly calculation for the model was carried out on DEFORM-2D,then the results were compared with experimental data, which showed that calculation results of this model kept good consistency with experimental data, and proved that the model could be applied in a full size finite element simulation of the micro forging process.
Preparation of Cottonseed Protein-Based Superabsorbent Hydrogel Composite
Authors: Zhang Bu Ning , Cui Ying De , Yin Guo Qiang , Zhou Hong Bin
Published: September 2011

A novel superabsorbent hydrogel was obtained by graft coplolymerization of cottonseed protein (CP), acrylic acid (AA) and 2-hydroxyethyl methacrylate (HEMA). This composite was synthesized by free radical copolymerization in aqueous solution in the presence of redox initiators, potassium persulphate and sodium sulfite, and N, N-Methylene bisacrylamide (NMBA) as cross-linking agent. The effects of the certain variables of the copolymerization on the swelling capacity of the hydrogel were measured and its swelling properties in different solutions were investigated. This approach shows a promising method in utilizing cottonseed protein to synthesis superabsorbent polymer with excellent water absorbency and potential in various applications.
Research on Inner Cooling Apparatus Sets in the Mold of 700mm×700mm Bloom
Authors: Bai Ming Hua , Liu Jing Jing , Ge Jun Li , Liu Zhi Qiang , Zhang Zhi Ming
Published: September 2011

Based on the problems emerged from market, 700mm×700mm super-large billet has been advanced. This paper calculated the casting speed and the depth of liquid core according to empirical formula for 700mm×700mm super-large billet, based on calculate and feasibility analysis acquired the appropriate casting speed is 0.2 m/min. A new mold has been advance based on mold thermoanalysis that is complex mold. Theoretically analyzed the function of setting inner cooling and deflected SEN, indicate that complex mold can improve heat transfer efficiency and equiaxed crystal ratio, reducing center segregation; level rotary flow can uniform molten steel ingredient and growth of shell, reduce the impact depth, achieve the effect of E-EMS; calculation show that reduce the depth of liquid core by applying complex mold, finally, reduce infrastructure fee of caster.
Study on the Graphite-Based Cementitious Material for the Soil Moisture Detective Probe
Authors: Yao Li , Liu Xiao Chu , Wu Hua Long , Li Wen Xiong
Published: September 2011

Soil moisture detective probe is an important part of automatic irrigation system. Soil moisture probe is usually made of metal material which is easy to be corroded and passivated as long-term working in the damp soil, especially containing acid, alkali and salt. We developed a new soil moisture probe material - the graphite-based cementitious material. The mechanical properties and the conductive properties of the material were tested and we found the graphite-based cementitious material which contains 30% to 50% of graphite could be an applicable material for the soil moisture probe.
The Bending of Symmetrical Laminated Composite Plate Based on Symplectic Method
Authors: Yang Y.Z.
Published: September 2011

This paper applies a symplectic method to study analytically the stress distributions of Composite laminated plates. Using variation principle and introducing separation of variables, dual equations were presented. Then in the symplectic space which consists of the original variables and their dual variables,the problem can be solved via effective mathematical physics methods such as the method of sepatation of variables and eigenfunction vector expansion. The transcendental equation and eigen-vector are deduced. The results of cross-ply and angle-ply laminated graphite–epoxy composite plate are shown, which is compared with established results. The parameters’ influences on mechanical property are also discussed.
Modeling and Simulation of PMSM DTC System Based on the Speed Sensorless
Authors: Gao Wen Gen , Jiang Ming , Qiang Shan Shan
Published: September 2011

The permanent magnet synchronous motor (PMSM) with its high efficiency, high power factor, small volume and advantage of saving electricity in many areas, has been widely used. The paper mainly analyses PMSM direct torque control (DTC) system, and estimates the speed based on speed sensorless control system, which based on the angle of speed estimation method of the motor rotor flux vector. Use Simulink tool in MATLAB to design and realize the control system simulation, and the simulation results are analyzed. Simulation results show the correctness and feasibility of the speed observation algorithm.
Research on Electromagnetic Pick-up Type Grip Device
Authors: Zheng Gang Feng , Yang Jie , Zhang Wen Li , Ling Li
Published: September 2011

An electromagnetic pick-up grip device is designed in the paper. The device is used to realize mutual attraction of the spot galvanized solenoid with iron core by using principle of electromagnetic induction. Thus, it can realize effective contact between sensor and testing specimen. It belongs to nondestructive testing support equipment. The device has the following characteristics of high accuracy, easy operation and continuous test of multi-sensors and multi-specimens because it adopts electromagnetic pick-up, step-motor controlling and recoil of spring device.
Studying on Multiple Services Precoding of MIMO System
Authors: Zhao Li Guo , Fan Wen
Published: September 2011

Multiple antennas at the transmitter and receiver have the potential to either increase data through spatial multiplexing or enhance the quality of transmission through exploitation of diversity. In this paper, based on studying proceeding of MIMO system, we propose a multi-service preceding algorithm. It makes sure different kinds of service have different SINR due to power allocation. The complex problem is decomposed into two separate steps. First, we achieve transmit vector for each user according SLNR to suppress CCI and noise. Then, we allocate the transmit power for users to satisfy SINR at receive end. Numerical simulation illustrates the effectiveness and support the use of multiple services in maximizing data rate and fairness among users.
Ant Colony Algorithm’s Application of Textile Monitoring Image Recognition
Authors: Fu Yang Lie , Chen Shu Qian , Zhang Li Hong
Published: September 2011

We can use video surveillance method to detection the weft in Glass fiber textile machine, avoids glass fiber weft bristling by contact weft detection sensor, Glass fiber dust damages to human health. Using Ant Colony algorithm of intelligent search, global optimization, robust, positive feedback, distributed computing, easy combination with other methods and other characteristics, resolve image segmentation, extraction monitor weft system in regional conditions, then use the default rule-based artificial intelligence reasoning in the region separately.
Fault Diagnosis of Hoist Gearbox Based on Time-Domain Analysis of EMD and Fuzzy Clustering
Authors: Li Zi Gui , Yan Bi Juan
Published: September 2011

In this paper, the method of combining the time-domain analysis of empirical mode decomposition (EMD) and fuzzy clustering is explored for the hoist gearbox fault diagnosis. Firstly, it adopts the EMD technique to decompose the signal of vibration. With it, any complicated dataset can be decomposed into a finite and often small number of intrinsic mode functions (IMFs). Then a number of IMFs containing main fault information were selected, from which time domain feature parameters-- variance and kurtosis coefficient were extracted. At last, fuzzy clustering is used to diagnose and identify the kind of fault. The numerical simulation and the analysis of the response signal data from the hoist gearbox show that the method is effective at discriminating the three condition of the gear, i.e. the normal, surface fatigue pitting and cracked tooth.
Construction Enterprise Supply Chain Design Research
Authors: Chen Lan Fang , Wu Gang , Zhang Yi Bin
Published: September 2011

The introduction of the thought of supply chain management into the construction industry can improve the competitiveness of enterprises. Based on the integration of both the effect of the supply chain as well as supply chain management and the actual situation, this paper analyzed the necessity of the construction and implementation of supply chain management of the construction enterprise. Compared with the supply chain of manufacturing industry, we found it feasible to implement supply chain management in the construction industry and analyzed the obstacles in it. Finally, it pointed out that the clustering of construction materials, information technology, business process reengineering, outsourcing of projects logistics and so on were the basis of constructing supply chain management of the construction enterprise, and accordingly the joint-design supply chain model of the project cost-oriented and the responsiveness-oriented was established.
Study of Coplanor Capacitance Prong Teeth Sensors
Authors: Wu Chun Hong , Zhang Cui , Wang Zhi Gang
Published: September 2011

Online sensors which are used to testing moisture play an important role in greenhouse system. Testing moisture which sensors is a key role to the accuracy is very important to agricultural development. The character of the sensors was directly associated with the development of greenhouse automatic system. There is no doubt that the structure of the sensors is critical to the testing results. A study of different sizes of sensors and the structure of capacitance sensors on precision was studied in the paper. We design the structure of the sensors and then conduct an experiment. According to the experiment, we decide the best size of the sensors.
Research of Fabric Weave Pattern’s Recognition Using Texture Orientation Features
Authors: Shen Jian Qiang , Zou Xuan
Published: September 2011

A novel approach is proposed for measuring fabric texture orientations and recognizing weave patterns. Wavelet transform is suited for fabric image decomposition and Radon Transform is fit for line detection in fabric texture. Since different weave patterns have their own regular orientations in original image and sub-band images decomposed by Wavelet transform, these orientations features are extracted and used as SOM and LVQ inputs to achieve automatic recognition of fabric weave. The experimental results show that the neural network of LVQ is more effective than SOM. The contribution of this study is that it not only can identify fundamental fabric weaves but also can classify double layer and some derivative twill weaves such as angular twill and pointed twill.
A Novel Precision Ultrasonic Thermometer
Authors: Zhang Xing Hong , Cai Wei , Xiang Feng Yun , Zhang Tian Heng , Liu Shu Xiang
Published: September 2011

A new type of temperature measurement apparatus is designed by utilizing the characteristic that the velocity of the ultrasonic wave varies with the temperature through the medium, with both merits low cost and high precision. This paper introduces the principle of ultrasonic thermometer and puts forward the realization of hardware and software of thermometer, and details the special software subdivision algorithm which is used to measure the ultrasonic transmission time accurately. The experimental results indicate that the thermometer achieves the measure of the ultrasonic wave transmitting time with nanosecond level. The key problems are solved in the practical application of the ultrasonic temperature measuring technology, and the resolution of the temperature measurement is better than 0.001 centigrade.
Study on Tooth Profile of Involute Conjugated Internal Gear for High-Pressure Internal Gear Pumps
Authors: Song Wei , Zhou Hua
Published: September 2011

Conjugated internal gear is the key component of high-pressure internal gear pumps, which decides the performance of the pumps, such like volumetric efficiency, capacity of fluid discharge, wear life, flow pulse, vibration and noise. In this paper, a method of generating tooth profiles for conjugated internal gear is presented. Based on gear geometry and meshing theory, the parametric equations of involute conjugated internal gear are derived. With the help of MATLAB and SolidWorks, 3D models of the gear couple are built to evaluate the feasibility of the method.
A Study on Improved Eclat Data Mining Algorithm
Authors: Li Zhi Fang , Liu Xiu Fang , Cao Xu
Published: September 2011

An introduction on the algorithm Apriori and FP-growth is given. And their advantages and disadvantages are pointed out. The rule of mining transaction databases has two common formats, horizontal layout and vertical layout. Normally, algorithm using vertical database layout is often superior to those using horizontal layout. A new Eclat algorithm was brought out, which is an improvement of Eclat and show good performance with a lot of datasets.
A New Approach for Coverage Area Computing of Radar Network
Authors: Wang Shen Shen , Che Wan Fang , Feng Jin Fu , Li Ming Zhong
Published: September 2011

Traditional methods regard coverage area of radar network as the union of every radar’s coverage area. Aiming at this issue, the relationship among radar detection range, radar cross section, signal-to-noise ratio, detection probability and false alarm probability is analyzed. Detection probability model for single radar is established. Calculation method of detection probability for radar network is also researched. Coverage area of radar network can be obtained according to the detection probability. Simulation results show coverage area of radar network is not simply the union of every radar’s coverage area and it is decided by the detection probability. Research of this paper provides a theoretical base of detecting, tracking and placement for radar network.
Application of Vibration and Noise Analysis in Water-Lubricated Rubber Bearings Fault Diagnosis
Authors: Peng En Gao , Liu Zheng Lin , Zhou Xin Cong , Zhao Mei Yun , Lan Fang
Published: September 2011

In order to investigate the failure mechanism of water-lubricated rubber bearings based on the method of time domain and frequency range of vibration signals, the characteristic performance is analyzed when there is failure and it is found that the abnormal vibration has relations with the contact pressure and the negative curve of speed-friction coefficient. Furthermore, some failure forms are quoted and applied to analyze the fault diagnosis of the rubber bearings. At a certain speed range and specific pressure, when the contact pressure is larger and the friction coefficient is higher, the vibration will be more obvious. Moreover, there are some preventive measures to avoid or eliminate potential hidden troubles.
The Research of the Ultrasonic Heat Meter Adopting the Two Reflection Structure
Authors: Liao Bin
Published: September 2011

The pattern of using the household billing to promote heating energy savings has become a focus discussion in the current national energy conservation. The key factor for following such way is to find a reasonable heat meter. To the national standard CJ128-2007, the length of the heat meter body is limited to 130/190 mm, compared with the actual diameter of the tube is 18 mm(standard20), the measuring of the small flux by ultrasonic is to some extend difficult. In this paper, we report a research of a two reflection structure flow meter. By a procedure of twice reflection, the effective distance of the spreading of the ultrasonic signal is longer than some other usual structures. So it can work in above conditions. The flow meter has been carried on the online testing in a district of Beijing since 2009.
The Design of Paver Driving Control System on SCM
Authors: Song Cheng Fa , Wang Ming Di
Published: September 2011

The digital controller applied to the traveling system of the paving machine is researched in this paper. The software and hardware designs of the control system utilizing microcomputer are accomplished; the complete mathematical model of dynamic characteristics for whole drive system is also given out. A specific control strategy to control the machine’s running forwards and backwards of starting, braking, accelerating and decelerating is designed, and the control of turning right or left and steering is put out too. At the same time, when the PID theory is put into the design of the digital controller, the study of constant velocity control technology is emphasized greatly.
Design and Modal Analysis of Automatic Cleaning Wall Mechanism
Authors: Li Dong Wei , Li Sen , Chen Xiao Min
Published: September 2011

As people’s living pace becoming faster and faster in modern society, a lot of machines which can substitute human beings, such as washing machine, dishwasher, have appeared. These machines can greatly save people the necessary labor times. The automatic cleaning wall mechanism which is studied in this paper belongs to a category of cleaning machine. It aims to clean the body cavity wall of a square. The primary research includes the mechanical structure design, the electrical control system design, and modal analysis for this mechanism in order to avoid resonance phenomena occurred between motors and bodies. At last, via experimental running, this mechanism can move forward according to our predetermined trajectory.
Design and Implementation of Nonlinear Junction Detection FPGA-Based System
Authors: Zhang Jie , Liu Xiao Jie , Li Yue
Published: September 2011

In this work, according to the nonlinear re-radiation characteristic of semiconductor PN junction, the nonlinear junction detection system for semiconductor junction targets based on second harmonic reception is designed on the basis of the analysis for nonlinear re-radiation characteristics of semiconductor junction targets, derivation of the system implementation scheme. By the system simulation and experiment, the preliminary test results show that the system can detect well the junction of nonlinear component with gain high enough for signal detection.
E-Business Data Integration Scheme Based on XML Technology
Authors: Hu Ya Ping
Published: September 2011

Integration of the distributed business process is a hard task within the enterprise. It has a very high cost for the integration between enterprises. There is still a lot of work to do in order to simplify coordination of business process within or between the corporations in essence. XML has broad prospects in e-commerce application, promoting the development of distributed business processes to some extent. In many XML-related technologies, XML-based Simple Object Access Protocol (SOAP) and WEB services technology is particularly prominent. Using XML and related standards and technologies, combined with e-commerce security and other available technologies, the paper established WEB services for SOAP as the media. It proposed economical, compatible, extensible and safe e-commerce data integration scheme, so as to deal with the problems in E-commerce data integration for enterprises.
Design of Control System of DC Motor Based on Fusion FPGA
Authors: Zhu Dan Dan , Li Hong Wen
Published: September 2011

Along with the development of microelectronic process, it is possible to integrate a big system in one chip. A new way to implement system on a chip is provided by the advent of FPGA. Based on Verilog HDL and the Actel Fusion AFS600 FPGA chip, the speed closed-loop control system of DC motor was designed by using options of combining the top-down thinking and the bottom-up method. PID control algorithm, encoder signal processing and PWM waveform generation etc were realized by the system. The results show that the system structure is simplified and the stability and reliability are improved. A solution of system on a chip is realized to some extent. It has extensive application value in engineering practice.
Feedforward and Feedback Control of an Inverted Pendulum
Authors: Wu Yun Feng , Ming Zhu , Fu Ke Chang
Published: September 2011

A feedforward-feedback controller (FFC), which is constructed by a feedforward controller and conventional PID in the global control scheme, is presented to control Inverted Pendulum in this paper. The angle of the swing-bar is defined as controlled variable for the controlled system and the displacement of swing-bar is taken as the disturbance. The feedback controller is used to control the angle and the feedforward controller is used to compensate for the displacement. Experiment results show that the proposed controller is of better control performance than the PID control scheme with two loops and the neural network control (NNC) scheme designed by Googol Technology (HK) Ltd.
Forming Process and Mechanism of Microcapillary Grooves of Miniature Cylindrical Heat Pipe
Authors: Wan Zhen Ping , Li Yao Chao
Published: September 2011

Miniature heat pipe is one of promising means of removing high heat flux for electronics cooling in limited available space. How to produce narrow and deep microcapillary grooves is the critical issue in promoting performance of axially grooved miniature heat pipe. In this work, the microcapillary grooves for miniature cylindrical heat pipe was fabricated by using oil-filled high speed spinning method. The forming process of microcapillary grooves was investigated. The influence of technical parameters on characteristics of microcapillary grooves was analyzed and the optimal technical parameters were found out. The experimental results show that drawing speed ranging from 48cm/min to 64cm/min, spinning ball number of 4 and big distance between the end of multi-tooth mandrel and the center of spinning balls within 3.7 mm should be chosen to obtain narrow and deep microcapillary grooves. In addition, the forming mechanism was investigated by observing microstructure of cross-section of microcapillary grooved tubes.
A New Strengthening-Polishing Bearings Equipment Based on the Anti-Fatigue Manufacturing Technology
Authors: Wang Hao , Liu Xiao Chu , Liu Chuan Jian , Li Wen Xiong
Published: September 2011

Aimed to eliminate the harmful residual tensile stress produced on the surface of bearing ring in the conventional bearing processing and join the automatically strengthen and polished technology together, the paper provide a set of new strengthening-polishing bearings equipment, designed to effectively improve the bearing surface’s quality and produce the surface residual stress which can extend the bearing’s fatigue life. The prototype, based on the pre-theoretical design, has been successfully developed, and now is in field testing.
Research on High Dynamic Target Electro-Optical Tracking Based Improved Robust Disturbance Observer
Authors: Yu Xiang , Liu Zheng Hua , Ren Yan
Published: September 2011

The compound axis control technique is an effective means to improve the accuracy and bandwidth of high precision electro-optical tracking systems. However, traditional methods of lead and lag correction can not achieve ideal performance. The robust control method based on the disturbance observer (DOB) is introduced in this paper, and the method is applied to the electro-optical tracking system together with the Kalman Filter. Compared to the traditional method of lead and lag correction, the method based on DOB can inhibit high-frequency noise and compensate for low-frequency interference better, such as frictions, and achieve better precision finally.
Study on Relief Valve with Permanent Magnetic Spring
Authors: Si Guo Lei , Yang Feng Yu , Wang Wen Jie , Liu Yu Hui
Published: September 2011

Based on mechanical phenomena between two fixed magnetic, when the distance is short, the electromagnetic force are linear,therefore,we can make full use of the characters and make it to be permanent magnetic spring replacing the mechanical spring in hydraulic relief valves. Through the use of the Rare-earth magnetic springs in relief valves, we find it is more sensitive to load. Besides these, the rare-earth magnetic springs have a long life and high temperature resistance without failure by fatigue. So the study and design of permanent magnetic spring type relief valve have large application and research value.
Secondary Source Modeling Based on Analogue Circuits of Electrical Mechanical and Acoustical Systems
Authors: Nie Yong Hong , Cheng Jun Sheng
Published: September 2011

A method of secondary source modeling based on analogue circuits of electrical, mechanical and acoustical systems (SSM-ACEMAS) was provided in order to reduce the mismatch of transfer function estimation of secondary path in the simulation of active noise control (ANC) system. The convergence range and noise reduction performance of the system with SSM-ACEMAS and Filtered-X LMS algorithm were investigated. The results show that the transfer function of such a secondary source model has different amplitude and phase from the ideal model, which makes the noise reduction performance of an ANC system be much worse than the one with ideal model. Meantime, the convergence range of the control system is increased at low frequencies while decreased at high frequencies. The proposed model can provide a new method of secondary source modeling for further research on the simulation of active noise control system.
Design of Portable ECG Tester
Authors: Fu Xiu Hui , Lin Hong Ru , Ouyang Shu Li , Song Wei Bo
Published: September 2011

In order to solve the problem of ECG acquisition and processing better, this paper designs a portable ECG tester, which uses the SCM as the core controller. Power basic frequency interference was removed by 50 Hz trap filter. Power harmonic interference, electrode polarization interference and my electricity interference were removed by low- pass filter. Baseline drift was removed by high- pass filter. At the same time; we test the performance of acquisition circuit, filter circuit and amplification circuit. As a result, it is shown that the system can well collect and process ECG signal.
The Design of Control System for Auto-Packing Pantyhose Machine
Authors: Li Pei Xing , Sun Zhi Jun , Zhu He Lei , Sun Yi Ze
Published: September 2011

In this article, the Control System based on the OMRON CJIM series PLC has been discussed, which meets requirements of the auto-packing pantyhose machine well. The principle and hardware configuration of the Control System were introduced, and the assignment of input/output, control programs as well as Human-machine Interface were designed. Importantly, the speed and quality of the packing of pantyhose were successfully enhanced, so this control system can effectively reduce the human resources.
Study on High Accuracy Constant Tension Controller of Winding Machine
Authors: Peng Zhi Hui , Ma Guang
Published: September 2011

Fiber winding tension control is a key technique in the winding machine which influences the quality of winding product directly. The change of diameter results in the winding tension becoming more complicated, time varying and non-linear and has a severe influence on steady and transient performance of winding system. This paper proposes a novel control scheme, which integrates the feedforward observation algorithm with PID control algorithm. One of the most merits is that it can compensate disturbance value based on the measuring data of rotational inertia and rotational accelerometer in real time. Simulation results show that control system has well qualified with high control precision and high response speed.
Study on Integrated Setup System with Computer Vision for Breast Cancer Radiotherapy
Authors: Tong Lei , Zhu Chao Hua , He Zhi Qiang
Published: September 2011

Purpose: To discuss a setup verification method based on computer stereo vision for the repeat setup in breast cancer fractional irradiation. Methods and Materials: A photogrammetric system is composed of two cameras and one computer. First, multiple characteristic markers’ coordinates are gotten by the two cameras, then the three-dimensional coordinates of the markers are calculated according to the basic principle of binocular calculated, which can construct breast and chest surface stereo features shape, thus the setup error can judge and correct before radiation therapy. At the tracking process, we use SITF (Scale Invariant Feature Transform) as the registration algorithm, which has strong robustness and accurate matching performance, meanwhile, dynamic choice matching image and local searching strategy are used in the process of calculation and mergence in order to make the target image matching more precisely. Results: Experimental results show that in breast cancer fractional irradiation, the system can accurately display setup error and can achieve real-time calculation. Conclusion: The proposed method can reduce setup error in breast cancer fractional irradiation, and has good stability and high precision.
ONAMA: A Quantum Leap in High Performance Computing
Authors: Misra Goldi , Agrawal Sandeep , Kurkure Nisha , Das Shweta , Mathur Kapil , Pawar Sucheta
Published: September 2011

The growth of serial and High Performance Computing (HPC) applications presents the challenge of porting of scientific and engineering applications. A number of key issues and trends in High Performance Computing will impact the delivery of breakthrough science and engineering in the future. ONAMA was developed to cope with increasing demands for HPC. ONAMA, which means a new beginning, is a desktop based Graphical User Interface which is developed using C and GTK. It aims to satisfy the research needs of academic institutions. ONAMA is a comprehensive package, comprising of applications covering many engineering branches. ONAMA provides tools that have a close affinity with practical simulation, thus making the learning process for students more applied. Most of the software tools and libraries are open source and supported on Linux, thereby promoting the use of open source software. It also provides tools to the researchers to solve their day-to-day as well as long term problems accurately in lesser time. The Execution Model of ONAMA serves to execute engineering and scientific applications either in sequential or in parallel on Linux computing clusters.
Identifying Variables for Measuring Organizational Performance Relative to QMS Implementation in Chinese Defense Industry
Authors: Peng Zhi , Li Jian , Zhang Jun
Published: September 2011

Identifying variables for measuring organizational performance relative to QMS implementation is the basis work for research of relation between QMS and organizational performance. Firstly, by literature analysis empirical researches in commercial industry are reviewed and the main variables are listed that help comparatively identify those in defense industry. Secondly, Chinese defense industry’s market structure, property of defense enterprises and defense product features are systematically analyzed and the preliminary variables for measuring organizational performance relative to QMS implementation are identified. Thirdly, with using Delphi method, those preliminary variables are screened and supplemented. At last, final twelve variables are identified, which are divided into three categories that are quality, innovation and operation. This study contributes not only to test the efficacy of QMS implementation in defense industry, but also to extend and deepen modern quality management theory.
A Bayesian Network Based Approach to Defect Prediction in New Product Development
Authors: Song Wen Yan , Ming Xin Guo , Wu Zhen Yong , Xu Zhi Tao , He Li Na
Published: September 2011

The development of new product with low cost and reliable quality is one of important means to improve customer satisfaction and increase manufactures’ profits. It is necessary to identify the key factors affecting product defects and control them early in the new product development (NPD) process with defect prediction methods, because defect prediction can effectively avoid or lower testing and unnecessary rework costs. The author proposes a new product defect prediction approach on the basis of Bayesian Network theory for decision-making in the NPD process. The proposed approach makes use of Bayesian Network to simulate defects’ formation process, and it has a strong learning ability without requiring much data at the beginning of defect prediction. Product developers can easily predict the probability of defect occurrence of new products with this practical approach. The proposed product defect prediction approach can also help to focus on key factors influencing defects most. An example of turbine valve development is used to illustrate the proposed defect prediction approach. Also, recommendations for future research have been suggested.
Study on Situation Awareness in Aviation Ergonomics
Authors: Liu Wei , Mu Dong Mei , Zhuang Da Min , Yuan Xiu Gan
Published: September 2011

With the development of aviation equipment automation, the research on situation awareness (SA) of pilots has become an active direction in the field of aviation ergonomics. Based on the research of the development of SA history, the concept, the impacting factors and the analysis of qualitative model, and combined with previous research results, the paper has established a new definition of SA and the corresponding multi-level trigger qualitative analysis model, which has laid a foundation for further design of virtual experiments and the establishment of quantitative simulation model.
The Design of a New Network Cabling Experimental Instrument Based on Embedded System
Authors: Wen Wu , He De Hua , Feng Hua , Gu Peng
Published: September 2011

Structured Cabling is not a demonstrative course, but a course to stimulate students’ learning interest and to improve experiment’s efficiency. Unfortunately there are some disadvantages for experimental instruments on the present market, such as low testing speed, low automation level and less functions, etc. A multi-processor structure is proposed in this paper, which consists of a 32-bit ARM processor S3C2440 and a 8-bit Single Chip Microcomputer STC89LE54. This structure is used to develop a new network cabling experimental instrument, which is based on embedded system. The instrument can achieve precise processing, such as synchronous data acquisition for wire cores of 32 standard network lines according to EIA/TIA568A Standard or EIA/TIA568B Standard, display and data storage, etc. The instrument has characteristics of high efficiency, fast response, automatic identification, and ease of use. It is used to implement consistency between teaching and job training. Therefore it has high practical value.
The Study of Forewarning Management Control System on Coal Mine
Authors: Hu Dong Hong
Published: September 2011

Two-thirds of fuel consumption is from coal, coal mine safety accident causes huge loss of property and threatens the life safety of workers. However, 80% of the accidents are caused by poor management. It is greatly necessary to study coal mine safety management control. The construction of forewarning management control system has great benefits on reducing accident. As it transforms the management model of the coal mine from afterwards controls to beforehand control. Forewarning management control system that composed by subsystem, data storage layer and show layer have the functions of. This paper will focus on management control with building forewarning management control system identifying, monitoring and diagnosing and evaluating dangerous factors to change it within security state.
The Applications of Direct Fluorinated HDPE in Oil & Gas Storage and Transportation
Authors: Yang Hong Wei , Yang Shi Liang , Wu Chao , Fei Yi Wei , Wei Xian Yong
Published: September 2011

Characteristics of elemental fluorine and carbon-fluorine bonds were analyzed. The barrier and oil-resistance properties of direct fluorination of HDOE were unveiled from molecule structure. The HDPE surface fluorination results in the increase of surface energy, cross link to some extent and shrinkage of polymer free volume.The application of direct fluorination of HDPE in oil in oil ＆ gas storage and transportation fields were reviewed, including oil and gas pipe,plastic petrol-tanks and HDPE impermeable membrane applied in oil tank foundation. After direct fluorination processing, the anti-corrosion and the permeability to hydrocarbons of HDPE pipes are strengthened. With the development of technology, it will be the trend that the multi-layer fuel tanks replace the single layer fuel tanks. The HDPE is applied as the outermost layer of multi-layer structure to ensure the processing property and the impact resistance in low temperature.
Design of Paving Equipment for Coiled Waterproof Material on Bridge
Authors: Liu Wen Xue , Shan Gen Li , Chen Hong Bo
Published: September 2011

In terms of the problem about paving coiled waterproof material on the highway bridge surface, an effective coiled waterproof material paving equipment is designed, and the total structure of the equipment and the function of important parts are described. The paper mainly introduces the characteristic and function of the stable walking system, automatic speed regulation system for uncoiling coiled waterproof material, agitating and leaking system of binding agent, coiled waterproof material paving self-adapted mechanism of the road surface. The equipment can adapt the condition of road surface, realizing wide area paving of waterproof material. It ensures the quality of the paving, and at the same time, enhances the paving efficiency, increases automatic level, and eases labor of technicians.
Theoretical Study on the Microwave Assisted Reversal of Magnetic Moment for Graining
Authors: Li Shuang Mei
Published: September 2011

This paper presents the dynamic precession of the moments of the grains based on LL equation, and the impact of the interaction between the grains on the minimum switching field threshold and the speed of the switching process in the microwave field is investigated.As an isolate grain, microwave assisted switching could enhance minimum switching field threshold and switching speed.
Analysis and Research on Fractal Model of Normal Contact Stiffness of Joint Interfaces
Authors: Lan Guo Sheng , Zhang Xue Liang , Ding Hong Qin , Wen Shu Hua , Zhang Zhong Yang
Published: September 2011

Through the analysis and research on three fractal models of normal contact stiffness of joint interfaces, the differences between them can be found. Furthermore, numerical simulation was carried out to obtain the complicated nonlinear relations between normal contact stiffness and the normal load. The results show that the normal contact stiffness increases with the normal load, decreases with G but complicatedly varies with D. According to different fractal dimension, we can chose an appropriate one among the three fractal models of normal contact stiffness of joint interfaces when describing normal contact stiffness of joint interfaces.
Effects of Laser Multiple Processing on Properties of Heat-Resistant Steel
Authors: Ruan Liang , Ren Xu Dong , Huangfu Yong Zhuo , Zhang Yong Kang
Published: September 2011

The heat-resistant steel after aluminized was treated by laser shock processing (LSP) with high power Nd:YAG laser, and then was tensile tested at 400°C. The effects of the high-temperature behavior after LSP were analyzed from residual stress and fracture organization. The results showed that the yield strength and tensile strength of heat-resistant steel after aluminized were improved obviously during the tensile testing at high temperature, and the High-temperature fatigue life of 00Cr12 with composite processing was enhanced vastly. Compared with the LSP, the High-temperature fatigue life of 00Cr12 heat-resistant steel by aluminizing and LSP had a larger increase.
A New Technique for Preparation of Two-Phase Foam Materials for Controlling Mine Dust and its Application
Authors: Wang He Tang , Wang De Ming , Ren Wan Xing
Published: September 2011

In order to overcvome the shortage of current dust control technology in coal mine, especially the traditional water spray method, a two-phase foam materials preparation experimental system was established based on the simulation of water and air conditions in underground coal mine. And a new technique which can prepare high-performance foam was proposed, and the main technical parameters and application conditions to implement foam dedusting were determined through plenty of experimental. Then, the new technique had been applied in two large underground coal mine. The results show that its dedusting efficiency to total dust and respirable dust reached 90.5% and 85.4% in the fully-mechanized excavated face, as 1.97 times and 1.88 times higher than water spray respectively. However, its water consumption is only as 10% to 20% as conventional water spray. It is proved that this new technique for preparation of foam can reduce mine dust concentration remarkably and improved the working environment obviously, and has a broad application prospect and promotion value to control dust in underground coal mines and other related industry.
Study on Single-Hoist Multi-Objective Optimization Rescheduling Problem
Authors: Wang Shi Long , Zhou Heng , Zhou Jie , Tang Rui
Published: September 2011

Combining with the actual production case, a multi-objective optimization rescheduling problem about that multiple products with various manufacturing processes in auto-production line aiming at a single hoist production in sequence where a new product is inserted is studied. Mathematical model and algorithm with a new stochastic scheduling method are proposed in fully consideration of the equipment (tank) and constraint of manufacture process. The model and algorithm which have been used in auto-production line of a surface treatment over half a year can meet the practical production requirements.
Numerical Analysis on Surface Stress of Rectangle Piston Ring with Chromium Coating
Authors: Ye Zi Bo , Qu Sheng Guan , Wang Guang Hong , Xia Wei
Published: September 2011

To investigate surface stress distribution of rectangle piston ring, method of increment loading based on energy variational principle is used to ascertain contact state and solve elastic contact problems by iteration. Calculation results show that the central section of the first sealing surface is subjected to lower stress while two sides higher stress. The theoretical analysis and experimental results indicate that appearance of stress peak on surface is related to movement direction of piston ring. Relatively critical wear regions of piston ring are consistent with finite element analysis results. Wear width of both sides is 0.2mm more or less. The section of maximal stress appears at position near ring groove of the first sealing area.
Study on Quality Control and Evaluation Methods of Development of Complex Product System
Authors: Yang Liang En , Zheng Lin , Ding Shan Ting
Published: September 2011

The development of complex product system (CoPS) has longer cycle and many factors affecting development quality. Therefore the quality control of development process is very important. This paper analyzes the characteristics of CoPS, discusses the current situation of the research at home and abroad about quality control and quality evaluation of the development of CoPS, proposes 3D model of quality evaluation and assessment. Development of CoPS can be divided into 8 stages: needs / development objective analysis, scheme design, technical design, manufacture (or building) design, manufacturing, overall test, online test, running test. For every assessed stage, third level index are determined based on resource and conditions, technical conditions and management. A structure of assessment index system of development quality of CoPS is proposed.
Study on Fiber Laser Welding for DP780 High Strength Steel
Authors: Huang Tao , Xin Li Jun , Wang Zhi Yong
Published: September 2011

Welding experiments of DP780 high strength steel plate produced by Baosteel with IPG YLR-6000-ST2 fiber laser have been processed. The influence of welding parameters on welding quality has been investigated. As well as microstructure and mechanical character of welding seam have been analyzed. The results show that the joint appearance of DP780 high strength steel welded with IPG YLR-6000-ST2 fiber laser has good performance and the mechanics property is good without fit-up gap. The microstructure of weld bead is columnar crystals, mainly lath-shaped ferrite, needle-like lower bainite and a small amount of martensite. Heat-affected zone is narrow and the grain grows with little size. The measured micro-hardness values of the sample decrease smoothly from weld center to base metal and there does not have softened zone.
Drawing and CNC Software System for Light Gage Steel Structure
Authors: Chang Zhi Guo , Yang Hui Zhu , Zhang Qi Lin
Published: September 2011

The primary program development principles and techniques of detailed drawings and CNC programming based on three-dimensional solid model for light gage steel structure are discussed. Components of the structure with complex spatial relationships and construction details are shown directly, accurately and completely based on 3D solid model, and structure properties and design requirements are integrated into the intelligent model. Therefore, drawings and detailed drawings can be drawn and labeled automatically by projecting and hiding with the extracted geometric information of particular entities. Further more, an automatic programming method for computerized numerical control is proposed, and CNC program are encoded according to manufacture information of parts in the model.
Active and Passive Deformation of Large Thin-Walled Workpiece in Heat Treatment Process
Authors: Lu Yuan , Kang Jin Wu , Nie Gang , Huang Tian You
Published: September 2011

Displacement is traditionally deemed to be equivalent to deformation. However, displacement is not exactly deformation, for example, the tip of a workpiece illustrates big displacement, but, it caused by the deformation of main body. In this paper, theory of active and passive deformation is proposed for the evaluation of the deformation of workpiece during heat treatment process and the corresponding algorithm was established. The deformation consists of active and passive deformation; the former is the actual deformation, while the latter is caused by the deformation of other areas. This algorithm was applied to the deformation analysis of a hydraulic turbine blade which is a large thin-walled workpiece. And the real deformation area of the blade is found.