bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Annealing Temperature on Two-Step Method of GaN Films
Authors: Liu Mei , Xu Xue You , Man Bao Yuan , Kong De Min
Published: December 2012

GaN thin films have been deposited on Si (111) substrates by pulsed laser deposition (PLD) of a GaN target in nitrogen atmosphere. An Nd: YAG pulsed laser with a wavelength of 1064 nm was used as a laser source. The results indicate that the GaN thin films deposited only by PLD are amorphous. By annealing in an NH3 atmosphere, the quality of the GaN thin films is improved, and the crystallzinity GaN thin films were obtained. The influence of annealing temperature on the crystallinity, structure, surface morphology and optical properties of GaN films have been examined by X-ray diffraction (XRD), atomic force microscopy (AFM) and infrared spectrum. In our experimental conditions, the GaN thin films deposited by PLD with a laser energy of 250 mJ, growth temperature of 800 °C and annealed at 1000 °C have the best surface morphology and crystalline quality.
Fundamental Study on the NMR Spectroscopy in a Time Dependent Longitudinal Field
Authors: Hu Yi Fan , Ma Hong , Li Jin Bo , Xu Bin
Published: December 2012

The paper mainly focuses on the possibility of realizing the NMR spectroscopy in a non-static external field and discusses the experimental scheme for developing the probes with the abilities to provide a precise real-time map of the time dependent magnetic field. From theoretical side, the paper analyzes the effect on the spin transition by a time dependent longitudinal field. For a 1/2 spin system, we have derived a simple formula for the prediction of the probabilities of occupation of the 1/2 and -1/2 states in a non-static field.
A Study of Magnetic Susceptibility of NMR Samples in a Time Dependent Longitudinal Field
Authors: Hu Yi Fan , Ma Hong , Li Jin Bo , Xu Bin
Published: December 2012

The paper mainly focuses on the possibility of realizing the NMR spectroscopy in a non-static external field. The behaviour of magnetic moment under a time-dependent magnetic longitudinal field is much different from that one under a static magnetic longitudinal field, because the magnetic susceptibility is a more complicated complex when both of transverse magnetic field and longitudinal field are time dependent. In this paper, we calculate the magnetic susceptibility of the water and give an analysis of the effect on the magnetic susceptibility in a time dependent longitudinal field and RF frequency.
Optimization and Practice on Method of Roof Control in Single-Support Coalface for Ascending Mining
Authors: Wang Xu Feng , Tian Li Wei , Wang Jin Liang
Published: December 2012

Based on the geology and mining technology conditions of III2 coal seam in Xinzhuang Mine, the method of similar material simulation test was adopted to analyze the characteristics of overburden caving and weighting in coalface under ascending mining, and the software of Rock Failure Process Analysis System(RFPA2D) was applied to simulate and analyze the roof control effect under different mining sequence and supporting method, then engineering practice was made in III2-12111 coalface. The results showed: mining the III2 coal seam under ascending mining, the periodical weighting was 6.7 m; compared with the method of four rows single-support in maximum roof control span and three rows single-support in minimum roof control span (shorting for three-four rows roof control method) in coalface, adopting the method of three rows single-support in maximum roof control span and two rows single-support in minimum roof control span (shorting for three-two rows roof control method), gob stowing was tighter, and hanging arch distance was reduced, and roof strata stress reduced by 10~15%; the observed result of mine pressure showed, adopting three-two rows roof control method (row space for 1.2 m, column space for 0.5 m) in coalface, compression of props and roof-to-floor convergence meet the requirements, it ensured the safely and efficiently mining in coalface, and obtained the largest monthly output of 30000 t, average monthly output of 26000 t.
Reverse Service: A New Concept of Service Science
Authors: Hao Hao , Zhang Feng , Tang Guo Chun , Wu Xing Gen
Published: December 2012

The service industry have become vital strength of today’s global economy. The traditional service are almost designed and drived from enterprise. This article firstly brings forward the concept of ‘Reverse Service’, which feature is ‘Customer Pull’, individuation, green low carbon and circulation friendly. The article introduce the meaning of the reverse service from the perspective of customer experience with its core content of the optimization of customer experience, path of reverse service and system optimization, intellectual value added and interface innovation, which objective is implementing cycle use of resource, green environment protection, maintaining service reputation, building up brand image and enterprise sustainable development. Based on this, this article summarize the scientific significance of research from this perspective including particularity, systematic science and green sustainability. Finally, the article gives the summary of the current research status and development trend of the relevant field.
Optimize the Governance Structure of Private Enterprises from Social Angle
Authors: Li Ji Guang
Published: December 2012

Because the optimization objective for governance system of Private enterprise is not to accurate, this thesis proves that the optimization objective for governance system of Private enterprise is not the maximization of “boss” interests, but also should be the maximization of enterprise and social efficiency, as well as the maximization of social total welfare; For Private enterprise, which kind of governance system is the most optimal, depending on the objective that is to ensure the interests of family controlling shareholders, or to protect the interests of non-controlling shareholders, or to meet the requirements of society and government for the enterprises. Different angles have different optimal standard, the Government will have to play a comprehensive role in guiding and leading. For that, Private enterprise should implement the system of distributing the number of director, setting up the shareholder committee, the source of supervisor socialization, the authority of supervisors' board higher than directors’ board, bringing employee into the governance framework, and implement government audit.
Analysis of Inventory Management in Internal Controls Perspective
Authors: Song Yuan Yuan
Published: December 2012

Inventory management is an important part of enterprise internal control. This paper analyzes based on the internal control perspective the internal control measures on the inventory during the stage of procurement, inspection and storage, delivery, warehousing and storage.
Cutting Characteristics of Titanium Graphite Composite by Wire Electrical Discharge Machining
Authors: Ramulu Mamidala , Spaulding Mathew , Laxminarayana P.
Published: December 2012

To improve strength to weight ratios, the fiber reinforced polymer composite materials are often used in conjunction with another material, like metals, to form hybrid structure. This paper reports the feasibility of using wire electrical discharge machining (WEDM) for cutting Titanium/Graphite Hybrid Composites (TiGr). Slit and slot cuts with WEDM process has been performed. Cutting times and process parameters were recorded, and cut surface characteristics were evaluated both with an optical and scanning electron microscopy (SEM). The results in terms of cutting time, workpiece material removal rate, and damage were presented and discussed. It was found that use of WEDM is possible for machining advanced hybrid metal composite laminates with appropriate machine settings.
Study on Numerical Simulation of Projectile Penetrating UHMWPE Fiber Layers and Effects of Projectile Parameters
Authors: Huang Gong Wu , Chen Ai Jun , Luo Shao Min , Xu Cheng
Published: December 2012

Finite element models of bullet penetrating UHMWPE fiber layers are established to study the relationship between parameters of projectile and penetration ability using LS-DYNA software. The numerical simulation results of penetration calculated in Lagrange algorithm are in good agreement with the real experimental results, which verify the validity of the finite element models and algorithm. The numerical results show that high speed and small angle of attack can improve the penetration ability, the penetration ability of oval projectile is better than flat head projectile. A valid and reliable research approach for evaluating the design of protective equipment and efficiency of projectiles are proposed.
The Analysis of Straightening Machine Straightening Parameter
Authors: Li Shan , Xu Liang , Wang Yu Qi
Published: December 2012

Copper is important to the national economy as a kind of raw material, the Copper metal with higher purity is got by electrolysis in generally. In order to ensure the uniform space between cathode and anode when they are in electro-groove, to attain the better quality of cathode copper and raising production efficiency, verticality of the cathode and anode must be well. So it is very necessary to straighten the Copper starting sheet to acquire the better verticality, this paper adopt the roller type straightening machine to straighten the Copper starting sheet by analysis and comparison according to the material and structure characteristic of Copper starting sheet .this paper will analysis and research the straightening parameter of straightening machine .
The Numerical Simulation and Parameter Optimization Analysis of Straightening Machine Straightening Process Based on ANSYS/LS-DYNA
Authors: Li Shan , Wang Yu Qi , Xu Liang
Published: December 2012

Copper is important to the national economy as a kind of raw material, the Copper metal with higher purity is got by electrolysis in generally. In order to ensure the uniform space between cathode and anode when they are in electro-groove, to attain the better quality of cathode copper and raising production efficiency, verticality of the cathode and anode must be well. So it is very necessary to straighten the Copper starting sheet to acquire the better verticality, this paper adopt the roller type straightening machine to straighten the Copper starting sheet by analysis and comparison according to the material and structure characteristic of Copper starting sheet . In order to test the straightening ,this paper will use the ANSYS/LS-DYNA to simulate straightening machine to meet the need of company.
Theoretical Analysis and Experimental Study of Material Removal Characteristics in Bonnet Tool Polishing Process
Authors: Zhong Bo , Chen Xian Hua , Li Jie
Published: December 2012

To achieve ultra-precision optical elements, this paper research on removal-function of bonnet tool polishing from the theoretical and experimental aspects. Firstly, based on the principle of bonnet tool polishing, we calculate the velocity distribution through the geometric relationship, the pressure distribution through finite element model. Then, according to Preston formula, the removal function model is built. Finally, experimental system of bonnet tool polishing is built to accomplish removal-function experiment. And the experimental result indicates that removal-function model is reliable.
Tool Wear and Surface Roughness Observation when Milling SKS3 Tool Steel with Electromagnetic Effects
Authors: Azuddin M.
Published: December 2012

Machining of hard steel through milling process is common technique nowadays. This work explores the possibility of using electromagnetic field to improve tool life and machined surface roughness. The milling experiments was conducted using carbide insert tool for cutting a SKS3 Tool Steel. Generally, the tool life quality and machine surface roughness was increase between 5 to 10% when milling with the present of electromagnetic field.
Analysis of UV Laser Machining Process for High Density Embedded IC Substrates
Authors: Park Sung Jun , Song Jung Han , Lee Geun An
Published: December 2012

New manufacturing process capable of high density patterns has been required. The most popular technique used today to form such fine pitch conductors is Semi-Additive Process(SAP) or variations of semi-additive process. New manufacturing method focus on the technologies designed to produce a smooth interface between resin and copper conductors for advantages in the high frequency application and fine conductor pitch capabilities. In this study, laser microprocessing was investigated for resin materials with various filler size, and was selected by suitable materials with processability and physical characteristics.
The Study of Matching Technology between Magnetometer and Vehicle
Authors: Zhang Yang , Kang Chong
Published: December 2012

With measuring instrument accuracy enhancement, it is to meet the requirements of the geomagnetic matching location, but the underwater vehicle is mainly made of ferromagnetic material, the sensor measured except magnetic field, besides magnetic field that the vehicle of the inherent hard magnetic and soft magnetic materials produce and vehicle magnetic fields produced in mechanical and electrical equipment. At the same time, the precision of the geomagnetic measurements will be affected by sensor manufacturing error and installation error factors. Therefore, how to extract the magnetic field from complex environment is a real time measurement of a difficult problem. This paper is based on the magnetic dipole magnetic field distribution theory to establish the vehicle of the magnetic field distribution mathematical model, and through the carrier of space and azimuth magnetic measurement get vehicle plane space magnetic figure. Through the related coefficient to deduce the best position of the magnetometer attaching on the vehicle to make magnetometer the smallest influence while sailing in.
A Study on Hydrostatic Extrusion of Al Duo-Casted Billet
Authors: Lee Jong Sup , Kim Yong Bae , Lee Geun An , Bae Dong Su , Park Jun Pyo , Lee Sang Mok
Published: December 2012

In this study, a Hydro Co-Extrusion Process of Al-Mn/Al-Si hybrid alloys prepared by electromagnetic duo-casting was investigated. Sleeve of the duo-casted billets is 3003 Al-Mn alloy and core is 4004 Al-Si alloy. It is expected hydrostatic stress during the HCE process enhances formability of materials and minimize any defects in extruded billets due to different material properties between two Al alloys. The duo-casted billet was extruded at temperature of 423K and with extrusion ratio of 5. Finally, the effect of the HCE on microstructure of the billet was investigated by an optical microscope.
The Minimum Circumscribed Circle Based Method for Hydro-Turbine Generator Unit Bearing Clearance Adjustment Analysis
Authors: Du Can Xun , Gui Wei Hua , Hu Zhi Kun , Liu Chun Bo
Published: December 2012

Hydro-turbine generator unit turning test is a key step to check the installation quality of the shafting system. The unit turning data is very important for bearing clearance adjustment. The traditional unit turning test and bearing clearance adjustment are based on a condition of that the spindle turning orbit is an approximate circle. It is simple to be used in the field operation and applicable to the most units. The trajectory of the turning orbit shows irregular shape when the spindle has a certain part of the flaw. If the traditional method is used for the unit turning and adjusting the bearing clearance, this may cause the eccentricity of three guide bearing bushes and uneven of the bearing clearance. The unit may appear a high temperature or large swing phenomenon after its commission. Seriously the unit may be burned and permanent damage. To solve this problem, this paper proposed a new method to calculate a minimum rotation space of the shaft in the bearing for each guide bearing clearance according to a geometric algorithm. Using the new method, according to the minimum circumscribed circle of the turning axis locus and final position of the turning spindle after unit turning, the bearing clearances corresponding to each turning number on the shaft can be calculated precisely. And then the bearing radial position is distributed properly so that the bearing is in the centre of rotation to the centre of the concentric circle. Therefore, the specific value of each bearing clearance adjustment is obtained. Site testing results show that using the new method the high temperature and large adjustment gap caused by using the traditional method can be avoided. Thus, the hydro-turbine generator unit operating stability is improved.
Design of a Rotor Assembly for Bandwidth Limiting Neutron Chopper
Authors: Zhang Xiao Zhang , Zhang Kai , Zhao Li Ru , Jiang Lei
Published: December 2012

A bandwidth limiting neutron chopper is an important device in neutron scattering facilities. It contains a rotor assembly running precisely under control to cut a neutron beam into designed pulses. There are a number of requirements for the rotor assembly to function rightly. The work described in this paper is on design and developing of the rotor assembly. Main content includes structure consideration, numerical calculation of the rotating part stress, test of resin composite adhesion, dynamic balancing process, as well as system operation result. A prototype of rotor assembly was made and operated at the speed of 3000 rpm, which satisfied the requirements.
Digital Frequency Synthesis Using DDS-Based Approach
Authors: Zhu Wei Hua , Shen Ying , Huang Guo Bing
Published: December 2012

This paper deals with some issues during the synthesis of DF signals such as change of phase and sine amplitude, smooth output and wave filter which features dynamics and variability. Utilizing AD9833 chip, this paper design the circuit that is used for synthesizing DF signals, including external circuit, wave filter circuit and amplify circuit. Given the characteristics of this chip, this paper provides the procedure design methodology that includes AD9833 initiative, write control and synthesis frequency. The testing experiments indicate the accurateness and reliability of this design.
Research on Metrological Characteristic of Micro-Differential Pressure Sensor in Draw Resistance Device
Authors: Ting Fang , Xue Ding
Published: December 2012

Micro-differential pressure sensor is one of the core components in the draw resistance device. Its metrological characteristic directly affects the accuracy of cigarettes’ draw resistance. Because different principles of micro-differential pressure sensors are used by each equipment manufacturer, the influences are not consistent on measuring the draw resistance. In order to study the influences of micro-differential pressure sensor on the draw resistance measurement, we will analyze its metrological characteristic through the acquisition of the output voltages under the different standard pressures. The experimental results show that the precision level of micro-differential pressure sensor using is higher, and it has little effect on the draw resistance measurement.
Evaluation the Performance of Fault Detection for dEWMA Control System
Authors: Jen Chih Hung
Published: December 2012

Recently, the dEWMA control system has been applied extensively for the semiconductor manufacturing. However, this control scheme exhibits a problem is that the existing R2R control system is scarcely discussed and evaluated about the operation of fault detection. In view of this, the research would combine double exponentially weighted moving average (dEWMA) control, weighted sum squared residual (WSSR), and joint angle analysis (JAA) methods to execute the process control and evaluated the performance of fault detection. Using various process simulations, a better parameter condition in WSSR and JAA algorithm can also be found. At last, a critical step for superconducting wire was used to illustrate the detection procedure for verifying the feasibility in practical application.
Study Ramp Steering Dynamics Problem of Small Tracked Vehicle
Authors: Chen An Cheng , Mu Xi Hui , Du Feng Po
Published: December 2012

The necessity and importance of studying the dynamical characteristics of ramp steering was described. After the force analysis of ramping going up, down and along the slope, Especially don‘t ignored unchanged load distribution that was caused by the longitudinal force and lateral force, Establish the mathematical model of traction and braking force. Through the simulation experiment, the result showed that the traction and braking force changed with definite rules when the tracked vehicle turned on the slope, which has practical significance for the further study of the vehicle’s power matching problems.
Research on Several Key Techniques of Power Tool Rest Noise Detection System
Authors: Lu Xiao Hong , Shang Yong Yan , Han Peng Zhuo , Li Guang Jun , Wu Wen Yi
Published: December 2012

The scarcity and imperfection of power tool rest noise detection method have seriously limited the development of the industry of CNC lathe, lathe and milling composite machining center. A noise detection system based on LabVIEW is developed. The developed system adopts a noise sensor as noise detection component to test the noise information of the power tool rest. To enhance the anti-interference ability of this system, the sampled signals are amplified and adjusted by the signal disposal instrument. Through the spectrum transformation and spectrum analysis of the sampled noise signals, the noise causes of the power tool rest can be inquired and the concerned measurements can be taken to reduce the noise effectively. Finally, the sampled data is stored by the data saving function.
Design and Simulation of Multicast Communication Model Based on 2D Torus Network on Chip
Authors: Wang Hao , Wu Ling
Published: December 2012

In order to avoid the deadlock and high transmission delay of network on chip in multicast communication, this paper put forward a solution of multicast communication model. First, the author carried out a formalized description for the multicast communication model. Secondly, illustrate the deadlock caused by the loop circuit waiting. To solve this problem, the NOC multicast communication model was proposed based on the 2D Torus topology. In addition, this paper also presented an example to validate its correctness. Finally, simulate and apply this model simulation to the NOC of 2D Torus topology structure by the OPNET Modeler. The test results show that this multicast communication model has lower transmission delay and higher throughput volume compared with the unicast routing strategy using XY routing.
Obtaining Plant Models for Formal Verification Tasks from 3D CAD Models: Which is the Best Approach?
Authors: Lobo Edgar , Fertuzinhos João , Silva João P.M.A. , Machado José
Published: December 2012

The use of analysis techniques for industrial controller’s analysis, such as Simulation and Formal Verification, is sometimes complex on industrial context. This complexity is due to the fact that such techniques require sometimes big investment in highly qualified human resources that have sufficient theoretical knowledge in those domains. This paper aims, mainly, to show that it is possible to improve the implementation and industrial using of such techniques, by facilitating their application. As any mechatronic system needs to be modeled by using CAD models, these models could be used, in a systematic way, by these companies in order to increase the use of such techniques for the analysis of industrial controllers. For this purpose, it is discussed, in the paper, the best way to systematize these procedures, and this paper describes, only, the first step of a complex process and promotes a discussion of the main difficulties that can be found and a possibility for handle those difficulties is presented. A case study is presented in order to illustrate how to obtain a plant model for formal verification purposes from an original 3D CAD model.
Joint Modeling and Simulation of the Spindle System of Hammer Crusher Based on Finite Element Analysis and Flexible Multi-Body Dynamics. Part2: Analysis
Authors: Wang Yu , Chen En , Gao Jun Qing , Gong Yun Feng
Published: December 2012

The hammer crusher always works under heavy load, discontinuous and impact working condition, which is complex, especially when impact happens. The spindle is one of the most important parts of the hammer crusher, the performance of which has a great effect on the whole structure. This paper discussed the main loads acting on the spindle. After the multi-body system dynamics (MBD) models were built up in previous paper, three kinds of multi-body system simulation (MBS) analysis were conducted to gain the impact loads, then a static analysis of spindle was carried out with the loads, which verified the reliability of the design of the spindle. To evaluate the correctness of the MBS results, comparisons between simulation and theoretical impact force results were done, which proved the acceptance of the MBD models. Another theoretical analysis model for the spindle was established and employed to verify the results of FEA and reliability of the design of the spindle.
Precipitation of Inhibitors in Grain-Oriented Electrical Steel during Hot-Rolling and Normalizing Based on CSP
Authors: Jin Zi Li , Ren Hui Ping , Li Wei , Guo Li Zhen
Published: December 2012

In this article, the behavior of dynamic recrystallization and precipitation of inhibitors in the grain-oriented silicon steel based on CSP technology was investigated during hot rolling and normalizing using Gleeble-1500D thermal-simulation machine. The factors of affecting behavior of recrystallization and precipitation of inhibitors were analyzed. The results provided a theoretical basis to understand the behavior of precipitation of inhibitors during hot rolling and normalizing in grain oriented silicon steel.
The Effect of the Magnetic Properties of NdFeB Magnets on the Zn or ZnO Intergranular Addition
Authors: Zhang Xue Feng , Ju Xiang Ming , Liu Yan Li , Ma Qiang
Published: December 2012

In this work we have studied the effects of Zn and ZnO addition on grain boundaries in the magnetic properties of NdFeB magnets. Zn and ZnO were added at the grain boundaries by double alloy process. Study on Zn and ZnO were effected of sintered NdFeB permanent magnetic materials .Results show that Zn and ZnO powder were added to grain boundary of improves magnets, coercivityHcj, remanenceBr, maxi-mum magnetic energy (BH)max, Zn was added1.2wt%,ZnO was added 1wt% to the maximum value, continue to add drop。Zn powders were added to the intergranular regions of NdFeB magnets, and their effects on the magnetic properties and corrosion resistance were investigated. In the scanning electron microscope, energy spectrum analysis showed that Zn and ZnO did not appear after entering the new metallographicals, Zn or ZnO distributed in where the main enrich at the Nd-rich phase[1]
Study on Networking Technology Based on ZigBee with Water PH Monitoring for Wireless Mesh Sensor Network
Authors: Fan Jing , Chen Nan , Xiang Chang Song , Wang Jin Long
Published: December 2012

According to the requirement of remote real-time water quality monitoring, this paper design a heterogeneous network topology including wireless sensor network and wireless mesh network. Based on Zigbee protocol a network system that can realize real-time water PH remote monitoring was constructed. In the system, the networking technology and network performance were studied by programming on real equipment. The study results shown that the system can realize real-time water quality PH monitoring data acquire and wireless transmission. Through Zigbee protocol under wireless mesh sensor network the performance of data transmission such as drop rate, delay, error rate are better than before. Those result proved that the manual based water quality monitoring can be replaced by Zigbee based wireless mesh sensor network monitoring system with more detail data acquire.
Quality Monitoring of Surface Roughness and Roundness Using Hidden Markov Model
Authors: He Kang , Jia Min Ping , Zhao Zhuan Zhe
Published: December 2012

The surface roughness and roundness(SRR) are widely used indexes of mechanical product quality. How to implement the SRR monitoring is a crucial task. In this study, the hidden Markov models (HMMs) and the cutting vibration signals are applied to monitor the SRR in variant cutting conditions. Unlike most of the prior work only to reveal one element of the geometric specifications, based on the theoretical analysis of the influence of tool vibration displacement on the SRR, the vibration energy characteristic(VEC) is determined to serve as the characteristic for monitoring surface roughness(Ra) and roundness(Rd) synchronously.Which make up the insufficiency of the comprehensive monitoring of workpiece quality. Moreover, although classical hidden Markov models (HMMs) have been successfully used for fault diagnostics of mechanical systems, this method based on recognition rate is becoming unreliable to monitor the accuracy of the workpiece. Hence, the HMM-based judgment matrix method is proposed and it is tested and validated successfully using for SRR monitoring through a series of experiments.
Analysis on Influence Coefficient of Workspace about a Configuration Palletizing Robot
Authors: Zhu Su Xia , Lei Quan Sheng , Li Jin Quan
Published: December 2012

A Case Study of IRB460 configuration palletizing robot of ABB. On one hand, we use D-H method to set up its kinematics model, and adopt numerical method to get its three-dimensional workspace maps and coordinate plane projection maps by using Matlab programming. On the other hand, this paper introduces the concept of workspace influence coefficient, which provides an important basis for the optimized design of its structure, to discuss in detail and make a quantitative analysis of the influence degree and influence trend caused by the change of rod length and angle parameters.
Multibus Based ECU Online Function Test System Development
Authors: Wang Pan Feng , Zhu Yu Tian , Wu Hao , Xie Bo , Gong Xian Yuan
Published: December 2012

As the key part of vehicle control, ECU must be tested after manufacturing. This online function test system aims to automatically test the hardware and software of ECU PCB after they are welded. Ａ test system consisting of upper PC, test board, and tested ECU is built. According to the feature of the ECU (mutibus based, hardware and software included), the communication protocol, as well as testing software for upper and lower devices is developed. This system is easy to be applied and expanded in related ECU PCB testing. Batch test with this test system for newly-produced ECU is implemented, which ensures high quality and stability of the products.
Keyboard Design for UAV Ground Station Based on VC++ Multi-Thread Technology
Authors: Yuan Dong Li , Li Huan , Xi Ao , Zhang Zheng Ming , Wei Jing
Published: December 2012

For the flight velocity of some UAV is high and the practice operation is much complex, the ground station keyboard based on multi-thread technology is designed. Also the keyboard is on the base of MSComm control in VC++ 6.0. There are two threads in this keyboard. According to the Serial Communication Protocols defined original the main thread accepts and transfers ground station command and GPS information. At the same time, the other thread scans matrix keyboard from which the UAV sends remote control command. The experiments testify that the keyboard can control UAV smoothly; meanwhile it is easy to operate for its simple configuration.
Development of Controlled Micro-Mirrors with Large Rotation Angle
Authors: Timoshenkov Sergei , Evstafyev S. , Britkov I.
Published: December 2012

Development of micro-mechanical sensors and systems based on them is one of the development branches in microelectronic technology and labeled as one of the technologies of the 21-st century. The relevance and significance of the paper related to the methodology creation for the development and manufacture of micro-mirror with large rotation angle. Methodology was based on an integrated approach to solving such problems as the processes of surface preparation, etching of the complex profile surfaces, matching the silicon structures, etc. which allows to create MOEMS elements.
Comparison of Workability of ZK60A Alloy Depending on Casting Methods
Authors: Jung K.H. , Ahn B. , Lee S. , Choi D.S. , Lee Y.S. , Lee G.A.
Published: December 2012

In this research, the effect of casting methods on the workability of magnesium alloy ZK60A was investigated by comparing two different billets, fabricated by semi-continuous casting and die casting. To determine the workability of the materials, uniaxial compression tests were conducted at different elevated temperatures and strain rate of 0.01/s. In addition, the X-ray inspection system and electron backscatter diffraction (EBSD) were employed to compare their internal defects and microstructures, respectively. The workability of ZK60A depending on the casting methods is discussed based on the obtained experimental results.
A Study on the Process of Lithium Battery Formation Manipulator
Authors: Han Liang , Xiao Feng , Chen Jia Wen
Published: December 2012

This article introduces two manipulator design schemes which can be applied in lithium battery formation process. According to the actual production conditions, we chose the second design scheme and successfully made a manipulator. In order to achieve effective gripping of the lithium battery, flexible shift and precise placement, the manipulator uses the pneumatic drive which is controlled by a computer to achieve the rotation movement, vertical offset and the gripper of the manipulator closing and opening operations. The manipulator can be completely able to meet the production line demand and the efficiency is much higher than manual work, which is proved by practice.
A Study on Li-Ion Power Battery Formation Energy Recycling Technology
Authors: Han Liang , Xiao Feng , Li Yuan An
Published: December 2012

Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation is a necessary process in battery manufacture. Every battery should be charged and discharged several times. On account of the current li-ion power battery’s problem of great amount of energy waste for using conventional techniques in the process of formation, two schemes about formation energy recycling are proposed. One of the schemes is to transfer energy from discharging batteries to charging batteries. It uses energy balance control strategy, and the efficiency can reach to 98%. The other one which uses PWM rectifier is energy feedback to grid scheme. The efficiency can reach to 95%.
Global Optimization Based on Weighting-Integral Expected Improvement
Authors: Li Zheng , Wang Xi Cheng
Published: December 2012

Balancing the global exploration and the local exploitation has received particular attention in global optimization algorithm. In this paper, based on Kriging model an infill sample criteria named weighting-integral expected improvement is proposed, which provides a high flexibility to balance the scope of search. Coupled with this infill sample criteria, a strategy is proposed that on each iteration step, the infill sample point was selected by the urgency of each search scope. Two mathematical functions and one engineering problem are used to test this method. The numerical experiments show that this method has excellent efficiency in finding global optimum solutions.
Study on Blood Compatibility of a Central Venous Catheter and its Pyrogen Test
Authors: Guo Feng , Yang Yang , Liu Fen Ju , Liu Qing Fang
Published: December 2012

Objective:To evaluate the blood compatibility of a central venous catheter in order to provide evidence for the safety of medical devices. Methods:The indexes of coagulation including thrombin time(TT), prothrombin time(PT), activated partial thromboplastin time (APTT) and fibrinogen (Fg) concentration, as well as the indexes of platelet function parameters including TXB2 and platelet count were measured, hemolysis test was conducted as well to detect the hemolysis rate of the sample. Results:There was no significant difference between the samples and negative controls on indexes of coagulation and platelet function (p>0.05), hemolysis test showed that the hemolysis rate of the sample was 1.35% (less than 5%), which was coincident with the criteria of the medical devices. Conclusion:The test sample of central venous catheter has good blood compatibility.
Process of Die Cavity Filling in Pressure Die-Casting Production
Authors: Fedák Marcel , Semanco Pavol , Ragan Emil , Rimár Miroslav
Published: December 2012

Process of die cavity filling in pressure die casting is described by relations for the laminar and turbulent flow and simulating in transparent die. It is shown at pressure die casting machines trough arrangement of the derived differential equations that the circuit of the process is stable aperiodical or damped oscillating favorable for control.
Evaluation of the Effects of Sterilization by Irradiation on Teratogenic Toxicity of Central Vein Catheter
Authors: Yang Yang , Liu Fen Ju , Liu Qing Fang
Published: December 2012

Purpose: The objective of this study was to evaluate the teraogenic toxicity of central vein catheters after irradiation sterilization and provide basis for further application of medical apparatus in future. Methods: central vein catheters were sterilized by irradiation as ISO11137 standard, afterwards, a series of tests including chromosome aberration test, micronucleus test and Ames test were performed to evaluate their teratogenic toxicity. Results: After irradiation sterilization, the samples showed no genetic toxicity (did not cause chromosomal aberrations) and no mutagenic effect, and did not increase the incidence of bone marrow cells micronucleus, demonstrating that the product material was quite stable after irradiation. Conclusions: No teratogenicity was induced in central vein catheters by the setting dose of irradiation sterilization. And therefore irradiation sterilization is a commendable method for such kind of materials, which deserves further promotion and application.
Development of a Miniature Strain Gauge
Authors: Chen Hai Bin , Wang Yi , Zhang Li Ying , Yang Guang Yu , Ning Xin , Cheng Xue Mei , Wang Zheng Guo
Published: December 2012

The cervical facet joint capsule is the major origin of neck pain. To in vivo test the cervical facet capsule strain, a flexible, miniature strain gauge was developed. A special liquid metal served as the strain sensitive element, and a tubular structure was selected as the configuration of this miniature strain gauge. Calibration tests and rear-end crash simulation experiments were performed to analyses the behavior of this new gauge. A physical head-neck model or living goat model was used as a human surrogate. Experiment results indicated the good linearity and stability of this miniature strain gauge. With the improvement of structural designs and manufacturing techniques, the miniature strain gauge stated in this paper has the potential to in vivo test the cervical facet capsule strain.
Research on Dynamic Alignment for Sophisticated System Based on ACP Technology
Authors: Wan Fei , Li Guo Xi , Gong Jing Zhong , Wu Bao Zhong
Published: December 2012

To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, the ACP technology is presented. The mapping between alignment process parameters and dynamic parameters was established through contact theory to build the agent model for parts. While the second mapping between dynamic parameters and machine dynamic characteristics is calculated by dynamic simulation software to conduct computational experiments. Experimental data is analyzed in order to implement data mine, optimize the alignment process, guide technician alignment, modify the theory mapping and improve the alignment efficiency.
Research on the Plateau Combat Support of Guided Ammunition
Authors: Li Tao , Liu Tao , Chen Li , Li Xiao Chen
Published: December 2012

In order to meet the new requirements of guided ammunition support ability in the new era, from the view of direction and degree of the guidance ammunition influenced by the plateau ,the theoretical research are combined with experiment methods used to explore the idea and the method under the special environment of guided ammunition, the guarantee mode and the adaptable improvement measures of the guidance ammunition plateau are put forward, the limitation of the routine guidance ammunition used at Plateau is break.
Dissemination of Manufacturing Knowledge: Manufacturing Knowledge Portal of Korea
Authors: Kim Young Gue , Heo Young Moo , Bae Sung Uk , Bae Sung Min
Published: December 2012

Automobile, shipbuilding, and semiconductors account for a large amount of Korea’s export industry rate. These industries need production technology which is a result of converting Worker’s know-how and R&D. Manufacturing knowledge portal aims to enables transforming production experience such as worker’s know-how into standardized form for constructing database and sharing technologies systemically. Manufacturing knowledge portal can contribute to small and mid-sized manufacturing companies with further improvements.
Effects of Rare Earths on Cast Microstructure and Mechanical Properties of 8Cr4MoV Cold Work Roll Steel
Authors: Wu Guo Sheng , Xu Zhu Tao , Zhang You Deng
Published: December 2012

Cast performance study of 8Cr4MoV cold work roll steels with four kinds of different rare earth content was carried out in the laboratory, the steels smelting by 50kg vacuum induction furnace, atmospheric casting, processing sample after annealing, then inspecting the microstructure, mechanical properties and micro-fracture characteristics of the steels; The results showed that the steels’ microstructure fine, micro-hardness and tensile strength increased with increasing rare earth content, while the shrinkage to eliminate, the micro-fracture characteristics of the tensile specimen showed a tendency of the cleavage unit narrowing and reduction of secondary cracks, and also the ductility improved.
Manufacturing Capability to Improve Project/Engineer-to-Order Manufacturing Performance
Authors: Yang Li Ren
Published: December 2012

Project manufacturing or engineer-to-order (ETO) manufacturing is an operation designed to provide unique but similar products. It not only takes advantage of common manufacturing requirements and efficiency, but also allow for customization into unique combinations. Unique orders may be managed like a manufacturing project. However, many manufacturers do not adequately enhance manufacturing capability leading to a poor project manufacturing performance. Thus, the primary purpose of this study was to assess the relationships between manufacturing capability and manufacturing project performance. The results suggest that manufacturing capability can improve manufacturing project performance. Furthermore, the positive association between manufacturing capability and manufacturing project performance depends on process maturity, complexity, time availability, and team size.
Effect of Mg Content on Age Hardening of an Extruded Al-Si-Mg-Mn Alloy
Authors: Kim Bong Hwan , Jung Su Kwon , Yoon Young Ok , Lim Hyun Kyu , Kim Shae K.
Published: December 2012

The main task of this study was to investigate the effect of Mg content on hardness of extruded Al-Si-Mg-Mn alloy after solution and artificial ageing heat-treatments. The Al-Si-Mg-Mn alloys with the variation of Mg content were fabricated through casting, homogenization and extrusion processes. The extruded samples were heat-treated – T6 temper. Thermal analysis with metallurgical examination was performed in order to optimize the condition of solution heat-treatment. Then, microstructure change was discussed by using optical microscopy and SEM-EDS. And the corresponding Vickers hardness was measured as a function of ageing time. It was found that the Vickers hardness slightly increased due to improved ageing efficiency and increased hard phase as the Mg content increased.
Effect of Heat Treatment Process on Microstructure and Properties of High Strength Heavy Plate for Ship Hull
Authors: Wan De Cheng , Cai Qing Wu , Yu Wei , Li Xiao Lin , Dong Chang Zheng
Published: December 2012

The variation of microstructure and their effect on the mechanical properties of heavy plate for ship hull treated by quenching in full austenite region at 910°C once or twice and tempering, or quenching in full austenite region and quenching in intercritical austenite region at 840°C again and tempering were studied with SEM and TEM. It was found that the strength and low temperature toughness of the steel were higher after double quenching in full austenite region and tempering than the steel which was quenched once and tempering, because smaller bainite inter-lath spacing, finer grains were obtained. The steel treated by intercritical quenching at 840°C after quenching in full austenite region and tempering showed the best combination of mechanical properties. This can be attributed to comprehensive effect of the uniform distribution of ferrite and bainite, stronger grain refining effect caused by formation of ferrite.
Preparation of Shape Stabilized PCMs by Vacuum Impregnating Method of Diatomite
Authors: Jeong Su Gwang , Lee Jeong Hun , Kim Su Min
Published: December 2012

This paper deals with the thermal performances of PCM/diatomite composites for energy saving. The PCM/diatomite composites were prepared by incorporating PCMs in the pores of diatomite to increase form stability of PCMs. In experiment, we used hexadecane and octadecane as PCM. The PCMs could be retained at 50wt% in the pores of the diatomite without leakage. Thermal efficiency was also analyzed through vacuum treatment during the preparation process. An optimal preparing method for 50wt% of PCM impregnation is proposed. Thermal properties of PCM/diatomite composites were determined using DSC, and were characterized by SEM and FTIR analysis. SEM results showed that the PCMs are well- infiltrated into the structure of diatomite. DSC analysis results showed that the latent heat capacities of PCM/diatomite composites were 50% the value of pure PCMs.
Research on Technology of Wood-Plastic Composites
Authors: Zhang Hua Yong , Liu Xiao Jian , Sun Hai Yan
Published: December 2012

Wood-plastic composites were produced by heating, blending and extruding with recycled plastics and wood fiber as chief raw materials and some thermoplastic resin as the additive. The compounding formula and producing craft were researched and optimized. The influence of the ratio of wood fiber and additives was examined. Wood-plastics composites with excellent performance were produced.
Artificial Neural Network – An Application to Predict the Fatigue Crack Growth Rate of HSLA Steel and Copper
Authors: Mishra Archana , Mishra Antaryami
Published: December 2012

In the present work , a prediction method has been used to describe the life of High Speed Low Alloy steel (HSLA Steel ) and Copper under constant load ratio by using Artificial Neural Network (ANN). Therefore a methodology has been developed to determine the fatigue crack growth rate (da/dN) of HSLA steel and Copper under constant amplitude loading at different load ratios i.e. R = 0, 0.2, 0.4, 0.5, 0.6 and 0.8 by adopting an exponential model to raw experimental a – N data. A soft-computing technique, i.e. Artificial Neural Network (ANN) has been formulated and implemented to estimate the fatigue life at R = 0.5. A comparison has been made with experimental data obtained by earlier researchers and found to be within limits and in good agreement. It is observed that percentage deviations from the experimental values for HSLA steel and Copper are 4.14 and 4.574 respectively. The error values are well within limits of -0.06% and -0.09% for both the materials.