bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Mechanism of Welding Hot Crack for Magnesium Alloys
Authors: Jiang De Ping , Yao Zong Xiang
Published: November 2012

The TIG welding was used to weld AZ31B magnesium alloys. The results indicate that hot cracking is related to the chemical composition of the filler metal and the welding current. When the AZ40M alloy, with low content of Zn, is used for the filler metal, no hot cracking appears in the weld. While the AZ31B alloy is used as the filler metal, or with no filler metal, hot crack appears in the weld seam.The hot crack will appear when the weleding current is over one point.The reason of hot crack appeared is some low melting eutectic appearing in weld. Key word: TIG Welding;Magnesium Alloys; Hot Cracking; AZ31B
The Classification of Non-Asbestos Gasket Formulation Using Clustering Method
Authors: Liu Mei Hong , Li Zhen Hua , Li Yu Xian , Chen Jun Ruo
Published: November 2012

At present, study on the non-asbestos gasket materials is the hotspot research in static sealing field. The non-asbestos sealing gaskets research and development has made great strides into the practical phase. Formula is an important factor of material, which determines performance of material. In order to obtain well performance, it is needed to optimization formula to get optimal formula that not only improve performance of non-asbestos gasket, but also reduce development time accordingly reduce cost of non-asbestos gasket. Classification of raw materials can be transformed into a mathematical clustering problem. It means that according to some algorithm, there will be some sort of input values of similar links together. Many neural networks were widely used in the classification of different materials. A method of classification by using neural network to the known 15 kinds of the non-asbestos gaskets of formula data was proposed in this paper. By using the PNN (probabilistic neural network), LVQ(Learning Vector Quantization) neural network and SOM (Self-Organizing Feature Map) neural network respectively to classify the non-asbestos gaskets to find a suitable method in the classification of non-asbestos gaskets formula. The results indicated that PNN neural network and LVQ neural network method based on the data that provided in the paper both can effectively classify, while SOM neural network can not classify them ideally, thus it provides a new theoretical basis for the classification of the non-asbestos gaskets.
Modeling for Production Rate Measurement of Hydrocyanic Acid Based on PSONN
Authors: Tang Zhong Jian , Song Miao
Published: November 2012

Aimed at the problem that it is difficult to measure production rate of hydrocyanic acid directly. So the soft measurement model of production rate of hydrocyanic acid can be established based on neural networks according to interrelated measurable engineering signals. Before being application to engineering, the soft measurement model is trained by PSO algorithm instead of the fast gradient descent method; Simulations prove that the soft measurement model trained by PSO possesses better measuring accuracy and stronger generalization ability. This kind of soft measurement model can be applied to practical production engineering of hydrocyanic acid.
Structural Design and Simulation Optimization of New Type Telescoping Heavy Hydraulic Trailer Steering System
Authors: Guo Rui , Zhao Jing Yi , Wang Yong Chang , Han De Cai
Published: November 2012

The length variability of telescoping heavy hydraulic trailer wills casue friction and sliding, increasing drag torque and power consumption of steering, moreover, and reducing the security and reliability of steering, so the new type follow-up steering system is designed and studied. In order to reduce the turning radius and tire wear, the adjustable steering wheel structure and double front axle mechanism are designed. On this basis, the theoretical analysis of the steering system is carried out, and the mathematical model is established. The minimum error of actual and ideal angle is regarded as the optimization goal of pure rolling condition, and the simulation optimization and experimental research is done. The results show that: the steering structural optimization is feasible, the performance is optimal on the condition that the actual and ideal angle valves of inside and outside wheels of each axis are approximately equal in turning process, and can reflect the advantage of new follow-up steering system in lowering power consumption, improving product life cycle and other areas.
A Hydraulic Control System Design for Change-Wheel Garage of Light Rail Based on PLC
Authors: Yang Yong Gang , Sun Jun , Yang Meng Tao
Published: November 2012

This paper introduces the hydraulic control system design for the change-wheel garage of Chongqing light rails through analysis of three-stage cylinder synchronization circuit for lifting bodies, and optimizing the design of the slewing mechanism with respect to the hydraulic servo control system of digital cylinder. The results improved the smoothness in the process of changing wheel lifting and the rotary accuracy of the rotary mechanism. Design on the PLC control system of the system is also included as part of this paper.
Performance Evaluation of CRM System Based on Cloud Computing
Authors: Fendy  , Handoko Iman Prasetya , Gaol Ford Lumban
Published: November 2012

PT. XYZ is a retail company that distributes electronic, furniture and home appliance products across Indonesia. As the business grows, the company faces many problems in manages their customer. So the company decided to implement CRM system based on cloud computing to manage their customer relationship. This research aims to evaluate the performance of CRM System based on cloud computing (Salesforce.com) on PT. XYZ which the results can be used by management to make decisions and strategies for the next steps. The performance evaluation divided into 3 which are financial, technology and business evaluation. The result shows that the system is working as expected. It has good financial, technology and business performance. Conclusions obtained from this research are, the company can continue the subscription of salesforce.com and even develop their system to cover and manage all companys customer.
Stress and Deformation Analysis for Caster Segment Based on ANSYS
Authors: Wu Yi , Liu Zhi , Yang Yu Jie
Published: November 2012

The segment is an important part of the slab caster. the designing and manufacturing of segment directly impact the quality of slab. It is necessary to research and analysis the segment. This paper analyses stress and deformation of segment. Firstly, specify the characteristic of segment structure, legitimately simplify the structure, figure out the force of every bearing box. Secondly, develop the 3-D model with SolidWorks software, then import it into ANSYS software, with which we develop the FEM model. Lastly, analysis FEM stress and deformation of FEM model, so the maximum stress and deformation is obtained. The state of stress is safe, but the stiffness is kind of insufficient. It can be improved in the designing process.
Numerical Investigations of Steel Beam-to-Column Connections with Reinforcing Plates
Authors: Valente Marco
Published: November 2012

This study presents the results of nonlinear finite element analyses performed on improved steel beam-to-column connections with reinforcing plates. The aim is to protect the potentially vulnerable beam-to-column groove welded joint by relocating the plastic hinge away from the column interface. The numerical investigation is based on results from experimental tests carried out on a two-storey steel frame tested at the JRC ELSA Laboratory and involves the modeling of the 3-way beam-to-column joint. The results of the numerical analyses on reinforced joints show that failure indices decrease in the weld region and near the weld access hole compared to the unreinforced connection, but high values of the Triaxiality Index are registered in the weld at the column interface. In order to eliminate the high shear stress in the beam flange and to reduce the high triaxial stress condition at the beam flange-column flange interface, the beam flange was disconnected from the column flange.
Seismical Protection Properties of High Damping Rubber Bearing and Lead Rubber Bearing Base Isolation Systems for Multi-Storey RC Buildings
Authors: Cancellara Donato , de Angelis Fabio
Published: November 2012

In the present paper two different base isolation systems, designed and verified according to the european seismic code (EC2 and EC8), are compared for evaluating the behaviour of a base isolated building, highly irregular in plan, in presence of a seismic excitation. The devices adopted for realizing the different base isolation systems are the High Damping Rubber Bearing (HDRB) and the Lead Rubber Bearing (LRB) both of them actuated in parallel with a Friction Slider (FS). A dynamic nonlinear analysis for a three-dimensional base isolated structure has been performed. Recorded accelerograms for bi-directional ground motions, compatible with the reference elastic response spectrum for each limit state have been used for a more realistic evaluation of the seismic response of the structure and a more realistic comparative analysis between the base isolated structure with the different considered base isolation systems and the traditional fixed base structure.
Quaternions and Vector Mapping in Three-Dimensional Space
Authors: Li Gui San
Published: November 2012

On the basis of analyzing the relations between vector operation and properties of multiplication operation of quaternions, the geometric representation and mapping of quaternions and vectors defined in three-dimensional space are established. The mathmatic operation of space vector, in addition to any space unit vector, rotating around three coordinate axises is carried based on the utilization of quaternions.The main purpose of this paper is to solve the issues of mathmatic tools introduced in spatial mechanism analysises and integrations by making use of quatnions.
The Optimal Regulations of the Interconnection-Degrees of Large Scale Systems under Instable Case
Authors: Wo Ying Ge
Published: November 2012

This paper discusses the stabilization problem of a large-scale system via cutting off the connections or decreasing the degree of interconnections among its subsystems subject to a cost function. Under the assumption that the large system is unstable but its sub-systems are all stable, a sufficient condition about the degree of interconnection is presented via cutting off the connections or decreasing the degree of interconnections among its subsystems such that the new large system is stable. This condition can be expressed by linear matrix inequalities (LMIs). Based on this analysis, an optimal regulation for such controls is obtained ensures the minimization of the cost function. An illustrating example is also given to show the effectiveness of the proposed method.
A Threat Sorting Approach Based on the Fuzzy Beliefs
Authors: Liang Wei Tai , Gao Jian , Yang Jin Pei
Published: November 2012

To overcome the limitations of the traditional threat assessment algorithms, a new threat sorting approach based on the fuzzy belief is proposed in this paper. In the new approach, the threat degrees described by quantitative number, interval number or linguistic label are all converted into the triangular fuzzy beliefs. The proportional conflict redistribution rule is used to combine the threat degrees of the same kind of assessment factors, the decision discounting rule is used to combine the threat degrees of different kinds of assessment factors, and the centroid method is utilized to make threat sorting. The new approach can not only deal with uncertain threat degrees, but also fuse the quantitative and qualitative threat degrees. The performance of the approach is analyzed in theory in this paper and the experimental results have certified its validity too.
Research on Acquaintance Coalition Based Integrated Fire Control
Authors: Dai Ya Ting , Yang Lu Jing , Lv Ying , Li Rui
Published: November 2012

This paper analyzes the characteristics of Integrated Fire Control, one of the combat models of the Network-Centric war, and presents the hierarchical control structure of different combat units according to their corresponding functions. The Multi-Agent System structure is also presented, and different Agent models are established according to roles they play in the system. This paper adopts the acquaintance coalition theory and the Contract Net Protocol to realize the negotiation among different hierarchical Agents. The acquaintance coalition has the advantage of reducing the range of bids and costs of communications. The Contract Net Protocol is employed in the three-layer Multi-Agent System, and is an effective negotiation to allocate the missile intercept tasks in real-time and dynamic environment.
Solving 3-6 Parallel Robots by Dixon Resultant
Authors: Sun Wei Kun
Published: November 2012

In this paper, we investigated the forward kinematic problem of the 3-6 parallel robots (Stewart platform) via a symbolic computation tool called Dixon resultant. 3-6 parallel robot is a variation of the classic 6-6 Stewart platform. First we constructed the system equations of 3-6 parallel robots with a certain coordinate system, and then gave the necessary and sufficient condition for the existence of roots of this system by resultant. With the expression of resultant, we could find the solution of the original system and determined the position of mobile platform. We also discussed how to deal with the extraneous roots.
A Trusted Multi-Party Authentication Scheme Based on Proactive-ElGamal Threshold Secret Sharing System
Authors: Yang Yu Guang , Chai Hai Ping
Published: November 2012

In most existing authentication schemes users are authenticated by the server one by one which results in lower efficiency of authentication when the number of users is large. Aiming at the drawback, this paper propose an efficient trusted multi-party authentication scheme based on threshold secret sharing, the discrete logarithm problem and ElGamal cryptosystem. Using (t,n) threshold secret sharing idea, the paper propose a (t,n) threshold authentication scheme which can not only simultaneously authenticate t users satisfying some specific conditions, but also authenticate new users dynamically by distributing a new authentication key for the new user which was produced by t old users and the new user together. Finally, the security and efficiency of the proposed scheme are analyzed.
Stochastic Admissibility for a Class of Nonlinear Singular Markovian Jump Systems with Time-Delay and Partially Unknown Transition Probabilities
Authors: Long Shao Hua , Zhong Shou Ming
Published: November 2012

The problem of the stochastic admissibility for a class of nonlinear singular Markovian jump systems with time-delay and partially unknown transition probabilities is discussed in this note. The considered singular matrices Er(t) in the discussed system are mode-dependent. By using the free-weighting matrix method and the Lyapunov functional method, a sufficient condition which guarantees the considered system to be stochastically admissible is presented in the form of linear matrix inequalities(LMIs). Finally, a numerical example is given to show the effectiveness of the presented method.
Impact of Risk Aversion on Optimal Decisions in Supply Contracts with Bidirectional Options
Authors: Wang Li Li , Wang Rong Zhong
Published: November 2012

Supply contracts with options have been proposed to provide flexibility in supply chains with high demand uncertainties. In this paper, we consider a flexible supply contract model with bidirectional options in which a risk-averse retailer subject to high uncertain market demand and ordering decisions. We use the Conditional Value-at-Risk, a risk measure commonly used in finance, as a decision criterion and derive the retailer's optimal ordering decisions equations. In particular, we obtain closed-form formulae to describe the retailer's optimal behavior when the demand is uniformly distributed. Numerical examples analyze that how the risk aversion and contract parameters affect the retailer's optimal decisions. We also numerically prove that bidirectional options improve the retailer's profit under risk aversions, compared with the wholesale price contract.
Construction Project Risk Decision-Making Based on Grey Multi-Objective Decision-Making
Authors: Li Hong , Yao Zhong
Published: November 2012

In order to make Construction project risk decision under multiple objectives and high uncertainty, this paper adopts grey multi-objective decision-making method to a highway construction project in Huanghua city to make a choice from the feasible alternatives. It proves that grey multi-objective decision-making result is a relatively optimal solution, which offers method for enterprises to make decisions practicably, accessibly and effectively under risks.
Study on Multi-BOM System of MES Based on Product Process Configuration
Authors: Jiang Zeng Qiang , Lin Ju Guang
Published: November 2012

Many kinds of datum are included in MES, and they are correlative each other, so organizing them is very difficult. In this paper, these data is described by a multi-BOM System including product-BOM, process-BOM, resource-BOM, plan-BOM and manufacturing-BOM. By the tache of Process-BOM, the five BOMs are mapping each other and organized as an integrated BOM system.
A New Method for the Production Process Optimization Management Based on Evolution Game and Failure Mode and Effects Analysis
Authors: Li Ding
Published: November 2012

To reduce product costs and improve the competitiveness of a enterprise, it is essential to optimize and manage the production processing in an efficient way. However, in many large-scale enterprises, the supervision and optimization of production processing is very complex and effective regularization is often difficult to achieve. To address this issue, a new method is proposed to optimize the production processing in large-scale enterprises in this work. The innovation of the proposed method lies on that it is the first time to use the integration of failure mode and effects analysis (FMEA) and evolution game analysis to deal with the issue of production processing optimization. The FMEA was firstly used to reveal the critical factors on the production processing optimization and the evolution game analysis was then applied to finding efficient/inefficient correlated equilibria in the optimization processing. A case study has been carried out in a company to evaluate and verify the new method. The actual situation has been taken into account for the practice evaluation of the proposed method. The analysis results show that the proposed method provides good production processing optimization and hence is feasible and easy to use in practice.
Evaluation of the Cooperative Innovation Efficiency in China’s Manufacturing Based on an DEA Clustering Model
Authors: Huang Xian Feng , Wu Bo , Wang Jian Hua
Published: November 2012

Cooperative innovation is an important way to improve an enterprise’s independent innovation ability. In this paper, an efficiency evaluation index system of cooperative innovation is set up for China’s manufacturing firstly, then a Data Envelopment Analysis (DEA) clustering model is proposed to classify the cooperative innovation efficiency of each manufacturing industries by pure technical efficiency and scale efficiency separately, finally an empirical study on China’s 28 manufacturing industries is done. Results show that most of China’s manufacturing industries have lower cooperative innovation efficiencies, the lower utilization of science and technology funds at internal payment and industry-university-institute external cooperative payment, and the insufficiency of patent application are the reasons for the lower efficiency in cooperative innovation. Lastly, some suggestions are presented to enterprises, cooperative members and the government for increasing cooperative innovation efficiencies of China’s manufacturing industries.
Agent-Based Modeling of Gates Assignment System
Authors: Gao Wei , Huang Hui Min
Published: November 2012

The optimization of Gate Assignment System is to reduce flight delays and improve the operation efficiency of airports, due to many complex factors and vulnerably sudden situation. Through analyzing the working process of gates assignment system and the rules of Agent technology, Agent concept is introduced into Gate Assignment System and a modeling architecture of Agent-based system is put forward, as well as the structure and function of each Agent is declared and the communication and collaboration mechanism among Agents is recommended. Additionally, in the framework construction, the Agents interaction is divided into two stages, or plan making and plan implementing, in order to realize the real-time adjustment of the whole assignment system. The results could be references for other related studies.
New Intelligent Condition Monitoring and Fault Diagnosis System for Diesel Engines Using Embedded System
Authors: Xu Hai Feng
Published: November 2012

Diesel engines are power source of various vehicles. Their complex structures make it difficult to detect pending faults in a timely manner. In fact, simultaneous existence of different faults is frequently found in diesel engines. To ensure the security of diesel engines, it is involved with two issues. One is the on-line condition monitoring, and the other is the intelligent fault diagnosis. However, the investigations have been addressed to one of the two problems extensively in previous work while very limited work has been done to develop an on-line intelligent condition monitoring and fault diagnosis (CMFD) system. For this reason, a new intelligent CMFD system is proposed to on-line analyze the vibration signals using the Hessian-based locally linear embedding (HLLE) and support vector machine (SVM) in this work to detect the diesel engine faults and to prevent the malfunction of the machines. The vibration signals were firstly recorded on-line by an embedded system. Then the HLLE was used to reduce the dimensions of original vibration signals to extract useful fault features, and lastly the SVM was adopted for faults detection. Experimental tests have been implemented to evaluate the performance of the on-line intelligent CMFD system. The diagnosis results demonstrate that the proposed method is very effective for the fault diagnosis of diesel engines. The faults can be detected on-line with a high rate of 90%
Study on Standard Map Index Mechanism Based on Multi-Source GIS Data
Authors: Xiong Wei , Wu Fang , Ge Sen , Li Bin
Published: November 2012

In allusion to the problem of quick search based on multi-source GIS data when studying render of GIS data, the author points out one standard map index mechanism. Using this index, we can quickly get right map data format, right map resolving power and right maps in the visible scope, and we improve the speed of map rendering.
Evaluation Model of Unemployment Difference by Region Using the Grey Cluster Theory
Authors: Chen Bao Ping
Published: November 2012

Abstract. Due to the different levels of economic development and employment policies,the unemployment problem is quite different in different regions of China.How to correctly evaluate the unemployment situation in different areas is the objective reality our country must take seriously in the times of economic transition. 30 provinces and Autonomous regions are used as clustering objects. The unemployment rates from various years are chosen as clustering indexes and whitening weight functions from corresponding indexes are defined. Meanwhile, clustering models of the unemployment assessment are provided and corresponding algorithms are compiled. 30 regions are divided into 3 groups by the unemployment rates: low,medium, and high. The conclusion from our research provided a systematic, objective and accurate evaluation of unemployment in various regions, it may has some reference value for solving China’s unemployment problems.
Numerical Simulation and Experimental Verification of a Vertical Jet in Swirling Cross-Flow
Authors: Kou Shun Li , Li Guo Neng
Published: November 2012

In order to investigate the bending and mixing characteristics in a vertical jet issuing into a swirling cross-flow, large eddy simulation method was employed to simulate the flow field of a jet in swirling cross-flow. Several jet to cross-flow velocity ratios (r=15, 30, 60) were investigated. The numerical results were compared to the experimental data measured from a phase tunable laser and CCD system. The Reynolds number Re based on the characteristic length of the cross-flow tunnel and the jet velocity lies between 22,537 and 90,146. Numerical results showed that the penetration depth of the vertical jet maintains nearly unchanged when the jet to cross-flow velocity ratio is large enough (r>30), which agreed well with the experimental data and was different from the flow field of jet in straight cross-flow. On the other hand, the case of r=60 obtained largest spread width, and the spread width maintains relatively large in a large penetration zone, which is consist with the experimental finding.
Efficient and Instant Transmission for Wireless Broadcast
Authors: Lu Ji , Wang Jun Fang
Published: November 2012

An Opportunistic Network Coding (ONC) based transmission approach (OCRA) is proposed to improve the transmission efficiency in wireless broadcast scenario. OCRA combines as many as lost packets by adopting opportunistic coding strategy, and makes terminals retrieve lost packets from single retransmission packet thus improving transmission efficiency. The theoretical analysis and simulation results show the feasibility and effectiveness of proposed approach.
Simple Synthesis of Layered Zinc Phosphate and its Evaluation of the Corrosive Effectiveness
Authors: Ma Shao Mei , Wei Dong Ping , Wu Sheng Fu , Huang Zeng Wei , Liao An Ping , Yuan Ai Qun
Published: November 2012

A simple synthesis method namely solvent displacement crystallization was used to prepare zinc phosphate, and obtained product was characterized by X-ray diffraction, scanning electron microscope and chemical analysis. The corrosive effectiveness of title zinc phosphate was evaluated by electrochemical impedance of two coatings immersion test. The results show that the obtained product is a highly crystalline, micronized and layered zinc phosphate. Comparing with commercial zinc phosphate, the synthesized layered microcrystalline product has excellent anticorrosive property in alkyd or epoxy coatings.
A Novel CBCD Method Based on 3-Dimensional SIFT Descriptors in Dynamic Tunnels
Authors: Hou Jie , Guo Bao Long
Published: November 2012

Content-Based Copy Detection (CBCD) is a heated research area. A variety of features are extracted and applied extensively to improve the performance of CBCD systems. A novel scheme which adopts 3-Dimensional SIFT Descriptors (Paul Scavenger, 2007) based on the innovative dynamic tunnels is proposed in this paper. The algorithm is aim to reach a proper balance between efficiency and accuracy. Experimental results indicate that the algorithm achieves an accuracy match with inexpensive computational cost.
The Application of 3-Colour Theorem and 4-Colour Theorem in the Problem of Repeaters’ Site Selection
Authors: Pei Liang Zhen , Lu Xin Zhong , Meng Ji Xian , Xu Feng
Published: November 2012

In wireless networks, implementing repeaters can improve network capacity and CCTSS systems can be used to mitigate interference. This paper discussed the selection of covering shapes in a given area, and presented an optimum scheme of channel assignment and PL allocation. Meanwhile, the 3-colour theorem and 4-colour theorem in graph theory will be given. At last, we introduce the application of 3-colour theorem and 4-colour theorem in the problem of repeaters’ site selection. By the relevant calculation, we can prove the application is reasonable.
Microstructures and Properties of W-26Re Alloy by SPS
Authors: Wang Song , Xie Ming
Published: November 2012

W-26Re alloy was fabricated by spark plasma sintering (SPS) technology. The phases, microstructures and mechanical properties of the alloy were investigated by X-ray diffraction, optical light microscope, scanning electron microscope, energy dispersion spectroscope, digital display micro-hardness tester and tensile test. Results show that, using SPS technique can prepare W-26Re alloy with high density, fine grain and excellent mechanical properties. The relative density of W-26Re alloy was 96.2%. The main phases in the alloy were determined by the amount of (W) solid solution and the intermetallic  phases. The micro-hardness was 729HV, the ultimate tensile strength was 1680MPa, yield tensile strength was 1143MPa and elongation of alloy was 8.7%.
Design of Weather Modification Assessment System for Evaluating Artificial Test Effect
Authors: Du Jing Lin , Shang Jin Long , Chi Wen Yu , Liu Rong
Published: November 2012

This paper presents an assessment system for evaluating artificial test effectiveness on weather modification. Algorithms that we used in the system depend on statistical test and regression analysis theory. Due to functional requirements, the system is mainly divided into two subsystems which are meteorological storage system and statistical evaluation system respectively. We implement it for handling and uploading meteorological data in special database service and making multi-index comprehensive assessment on artificial test effectiveness by rainfall and temperature materials. From the result of system test, the assessment system works efficiently and performances satisfactory fault tolerance.
SVM Based Land/Sea Clutter Classification Algorithm
Authors: Jin Zhen Lu , Pan Quan , Zhao Chun Hui , Zhou Wen Tian
Published: November 2012

In this paper, a support vector machine (SVM) based land/sea clutter classification algorithm was proposed. For target location error correction based on passive beacon reference source of over-the-horizon radar (OTHR), the signal model of land/sea clutter is established, the three kinds of multi-features of land/sea clutter are analyzed, and the classification algorithm based on SVM using multi-features is detailed. Simulation experiments were carried out for different clutter-noise- ratios, and the results showed that the proposed algorithm has a higher recognition rate of land/sea clutter than algorithms based on single feature of backscatter amplitude or linear discriminant analysis. This paper could provide theoretical guidance for improving target location accuracy.
Face Detection Based on Gabor Wavelet Transform and Statistical Cluster Model
Authors: Yu Wei Wei
Published: November 2012

A gray-image face detection algorithm was proposed, in which feature vectors were Gabor wavelet coefficients at 4 scales and 6 orientations. Firstly, feature vectors of training samples and negative samples were separately clustered. Secondly, these clusters were reduced by discriminate analysis. Finally, distribution model of feature vectors was built and average probability was calculated to determine if the testing image was similar to face samples. The experimental results show the algorithm is effective.
The Development of ECG and PPG Measurement Device
Authors: Hong Ming
Published: November 2012

We design a portable measurement device which can simultaneously detect ECG (electrocardiograph) and PPG (photoplethysmograph pulse wave) signal, analyze arrhythmia and calculate SpO2(oxygen saturation of blood). It consists of two parts: the main and the sub. Besides of the most important part MSP430 MCU, there are front-end amplifiers, filter circuit, Bluetooth module, data management module, keyboard and LCD display module, etc. The device can detect QRS complex and PPG signals in real time. For the Fantasia database and patients, the monitor can correctly judge the QRS complex of ECG signals and PPG signal.
Control Method Research of Electrical Vehicle Used IPM Synchronous Motor
Authors: Chen Dan Ya , Zhang Jian Qiang , Huang He , Lu Yun
Published: November 2012

The salient effect of the rotor structure of the interior permanent magnet synchronous machine (IPMSM) makes it more suitable for running in the zone that exceeds the rated revolution by flux-weakening control. Therefore, the closed-loop speed regulation system composed by IPMSM can achieve excellent dynamic performance, high precision and wide speed performance. On the basis of the mathematical model of d / q coordinates of IPMSM, this paper discusses the control proposal of IPMSM: to control the current of d / q axis to maximize the speed range.
PSP Statistical Modeling for 40nm MOSFET
Authors: Zhou Hui , Li Xi , Ren Zheng , Zhang Meng Di , Sun Li Jie , Hu Shao Jian , Shi Yan Ling
Published: November 2012

This paper presents a statistical model based on PSP MOSFET model in 40nm CMOS technology. Nine parameters are modified in PSP model to establish the statistical model. The simulation result verifies the accuracy of the model, the error of σ value is controlled within 5% and the error of mean value within 2%. The proposed model could optimize the circuit design in nanometer CMOS technology node.
Discrete Harmony Search Algorithm for the Disassembly Scheduling Remanufacturing Engineering
Authors: Gao K.Z. , Suganthan P.N. , Chua T.J.
Published: November 2012

Remanufacturing is a growing branch of the traditional manufacturing industry. In this study, a discrete harmony search (DHS) algorithm is proposed for thedisassembly scheduling of products in the remanufacturing engineering.Firstly, the disassembly scheduling of products is regarded as flexible job shop scheduling problem. Then, the harmony search algorithm is discretized for the disassembly scheduling problem.Finally, simulation experiments are carried out to test the proposed discrete harmony search algorithm. The results and comparisons show the effectiveness of the proposed DHS algorithm in solving the disassemblyscheduling problem in remanufacturing engineering.
Application of Distributed Control System in Papermaking Process Based on CIPS Technology
Authors: Liu Xing Ping , Xiao Zhong Jun
Published: November 2012

According to the user’s high technical requirement in papermaking process, advanced control system has been supplied to satisfy the performances. Meanwhile, energy consumption and cost are considered. The computer integrated process system (CIPS) of process industry which could effectively integrate enterprise resource planning, management execution system and process control system information is necessary and suitable for papermaking process. Here based on the analysis of pulp and paper process, we put forward the papermaking process computer integrated process system and try to obtain the optimal control project and execution system. And a novel optimized application project based on SIMATIC PCS7 distributed control system proves the excellence of computer integrated process system.
Study on Control Strategy of Shape Set up System for HSM
Authors: Guo Zhong Feng , Hu Jun Hong , Sun Xue Yan
Published: November 2012

Shape Set Up (SSU) system is the key technology for Hot Strip Mill (HSM). Precise SSU system is applied to improve the strip quality for HSM. The function of SSU, Setup and Feedback, is introduced. The main mathematic model of strip profile is set up. SSU system strategy is studied of a certain domestic 1700mm HSM. The SSU system is carried out in produce and the measurement data show that strip flatness deviant and strip profile deviant could be controlled in target scope. The study has set a sound base to improve the setting accuracy and develop SSU system for HSM further.
The Analysis of Intra-Industry Trade in Auto Parts Industry in Jiin Province
Authors: Wang Dong
Published: November 2012

In recent years, the import and export scale of auto parts industry grows increasingly in Jilin Province. According to the index of intra-industry trade of auto parts, the intra-industry trade level of the Jilin Province’s auto parts is relatively lowly, there are a great of room for development. In order to enhance the level of intra-industry trade, the enterprises should promote the upgrading of the processing trade, improve the quality of imports, take the independent brand and intellectual property rights as the key, to enhance the export competitiveness. The auto parts enterprises must shift gradually to the plurality of supporting activities from the original single production activities.
Inverse Design of Air-to-Air Missile System Based on Improved Genetic Algorithm
Authors: Zhao Hua Chao , Nan Ying , Gu Liang Xian
Published: November 2012

The inverse design of air-to-air missile system was researched according to its target performance database. Firstly the initial model and database of air-to-air missile were set based on a foregone and similar missile model which includes the database of aerodynamic coefficients, engine performance, mass properties, guidance law and so on. Then this initial model and database were optimally modified by using the improved elitist preserved genetic algorithm and flight simulation based on the 4-D motion differential equations of both the air-to-air missile and target vehicle. The inverse design algorithm globally minimized the performance errors which were obtained from the inversely designed envelopes compared with the desired target performance database of maximum intercept envelope and the maximum impossible escape (no-escape) envelope. The optimized numerical simulation results of inverse design are showing that both the average error and the maximum error of missile envelopes are very small and can be acceptable, which verified that the inverse design algorithm of system is high accuracy and reliable.
Network Design and Implementation of Intelligent Warehouse Based on EPC/RFID and WSN
Authors: Li Hong Sheng , Bian Guang Rong , He Ning Hui
Published: November 2012

The establishment of intelligent warehouse improves the efficiency of the items storage and realizes the localization and tracking of the various elements of the warehouse. Users can dynamically monitor the location and whereabouts of material, operating machinery and vehicles in warehouse by intelligent terminal. The overall architecture of the intelligent warehouse is built on the Internet and the Internet of Things.With the use of RFID technology, the wireless sensor network technology, the short-range wireless communication technology and automatic identification technology to locate and track the various elements of the warehouse for making warehouse management automatic, intelligent and accurate. The paper first analyzes the basic architecture of the intelligent warehouse system and designs the network architecture of the intelligent warehouse. It also compares the real-time location tracking system based on the RFID with the one based on wireless sensor networks. Therefore it can develop improved method of intelligent location tracking system and apply 8421 coding techniques in the localization and tracking of the intelligent warehouse so as to obtain a satisfactory effect of static and dynamic positioning.
A Performance Modeling Language for Automotive Embedded Control Systems Based on UML
Authors: Yin Xiao Feng , Tan Jing Xing , Wu Xiu Ting , Gong Zhi Jun
Published: November 2012

To improve the timing related performance of the embedded software of automotive control system, a performance modeling language has been developed based on UML (Unified Modeling Language) using meta-modeling technique. The proposed language consists of three kinds of meta-models used to define the high-level modeling paradigms for software structure, target platform and runtime system respectively. The modeling environment configured by the proposed language and software modules of functional model importation, components allocation, task forming and timing analysis can reuse the existing functional models, add timing requirement as well as resource constraints, and fulfill formal timing analysis at an early design stage. As results, the reliability of the automotive embedded control software can be improved and the development cycle and cost can also be reduced.
Based on the PS/T Method Control Design of Flexible Systems
Authors: Meng Fan Wei , He Zhen , Yu Zu Yu , Wang Li Hua
Published: November 2012

The lightly damped resonant poles of flexible system increased norm of coprime factor perturbation, which reduced robust of system after loop shaping design. This paper proposes approaches considering the performance of constraints, to select performance weight function through disturbance attenuation and to adjust the complementary sensitivity weight function through design index. The flexible satellite's attitude control demonstrates that the two approaches are able to rapidly select weight function under ensuring the system's robust and have the ability to depress disturbance.
Experimental Investigation on Fatigue Property of Asphalt Concrete Modified by Diatomite-Glass Fibers
Authors: Cheng Yong Chun , Ma Hui Li , Guo Qing Lin , Xu Chun , Zhang Peng
Published: November 2012

Diatomite and glass fiber are used for modifying asphalt concrete in this paper. Besides, wet and dry processes are adopted to achieve the composite modified asphalt concrete. Meanwhile, experimental investigation has been done on its fatigue properties and dynamic mechanical property, it indicates that diatomite-glass fiber modified asphalt concrete has a better capacity to resist fatigue damage. Compared with matrix asphalt concrete, the modified asphalt concrete has higher fatigue life. Thus, its mechanical parameter of fatigue property changes obviously so as to provide a reference basis for the durability design of pavement materials.
Study on the Hot Stamping Process of DP Steel Engine Dumping Plank Based on FEM
Authors: Liu Han Wu , Dong Rui Hua , Li Xiao Xia , Ping Shao Bo
Published: November 2012

In order to lessen the worsened formability, failures and fractures occurring in the cold stamping process, the hot stamping technology was adopted in the forming of DP steel engine dumping plank. The simulation technology of finite element method was also used to forecast the forming defects in the stamping process of the DP steel engine dumping plank. In the paper, the forming limit, the influences of stamping gaps and the influences of different blank holder force on the stamping part were analyzed by using eta/DYNAFORM software. Meanwhile, the thickness changes and the materials flow conditions of the DP plank during the hot stamping process were also analyzed. Through the experimental analysis, the result of the finite element numerical simulation complied very well with that of actual production results. The research results show that duplex steel plate can meet the performance requirements of car engine dumping plank forming, which offers theory basis for the production of similar parts.
Algorithm of Identifying Pencil-Cutting Regions for Free-Form Surface
Authors: Li Wan Jun
Published: November 2012

This paper presents a methodology for pencil-cutting regions detection in five axis NC machining of free-form surfaces. The local interference of surface occurs when the radius of the local surface curvature is smaller than that of the cutter. It is a time-consuming work to calculate the free-form surface curvature by differential geometry, so the arc radius is used to approximately compute the curvature radius of the surface to judge the local interference. Computer implementation and practical examples are also presented in this paper.
Stress Distribution in Reverse-Bent Bonded Joint
Authors: Tang Yong , He Xiao Cong , Zheng Jun Chao , Zeng Kai , Ding Yan Fang , Hu Yue Bo
Published: November 2012

Adhesively bonding technology is used increasingly by the automotive and aerospace industries. The design of reverse-bent joint is effective way for improving the bonded joint performance. The influence of preformed angle on the stress distribution of the adhesive-adherend interface is studied in this paper using finite element analysis (FEA). By comparing the results of the FEA for reverse-bent joints with different preformed angle, it can be seen that the preformed angle not only have significant influence on the stress distribution of overlap section, but also changes stress concentration at the spew fillet of bonded joint. The results also indicate that there is a best value of preformed angle in which the reverse-bent bonded joint has the best performance.
Data Storage Model for Laser CDs
Authors: Wei Ying
Published: November 2012

In this paper, we present an analysis of the data capacity for different types of laser disc technologies. Two design factors, laser wavelength (infrared, red or blue) and disc drive mechanics (CLV or CAV) are studied, and brief introductions to these two design factors are given. Moreover, diffraction, technical data and background information about disc drive mechanics are discussed, the conclusion is drawn that CAV-type is more than CLV type of capacity, consistent with its production principles.
Effect of Instrument Precision on Area Quality Measurement Used in Digital Printing Quality Assessment
Authors: Cui Xiao Meng , Chen Guang Xue , Chen Qi Feng , Tang Bao Ling , Tai Jing Lei
Published: November 2012

In this study the effect on quality measurement introduced by input precision of instrument in image digitizing process was verified through a series experiment. Two categories of samples, which were outputted by EPSON Stylus Pro7880c digital inkjet printer and Xerox DocuColor5000 digital xerographic printer individually, were transformed into digital image with a normal flatbed scanner in 600 DPI, 1200 DPI and 1600DPI resolution. The area quality attributes such as graininess, mottle, NPS and banding were surveyed and analyzed with the aid of PIAS™-II personal image analysis software to investigate the stability of normal instrument used in digital prints measurement system. Results show that precision demands are different for various quality parameters and different application backgrounds, namely it is precise enough for common industry detection which has lager tolerance, but higher resolution does good to more effective and more precise measurement especially in R&D.
Test and Finite Element Simulation of Steady-State Temperature Field of Rolling Tire
Authors: Duan Xiang Lei , Zuo Shu Guang , Li Yong , Jiang Chen Fei , Guo Xue Liang
Published: November 2012

To analyze the steady-state temperature field, a three-factor orthogonal test was taken to study comprehensively how the load, speed and tire pressure can influence the tire temperature. The finite element simulation was carried out according to the uncoupled idea. Based on the single-factor analysis towards the speed factor, the actual convection coefficient of different boundaries was determined to calculate the steady-state temperature field at last. These analyses indicate that the tire temperature rise increase with the factor of load and speed, decrease with the increase of the initial tire pressure. The load has the biggest influence on the tire temperature rise, while the speed has the least. With the combination of steady-state temperature field and heat generation rate distribution, all these high-temperature regions can be explained clearly from the finite element perspective.
Voltage and Frequency Droop Control in an Autonomous Microgrid
Authors: Ying Xiao , Lin Heng Wei , Yan Zhao Yang , Li Jian Xia , Su Ming
Published: November 2012

In this paper, a method for the parallel operation of inverters in an autonomous microgrid system is adopted. This paper presents the resistive output impedance control scheme that allows multiple voltage source converters (VSCs) to operate in parallel in a VSC fed microgrid. The control loops are taking into account the special nature of a low-voltage microgrid, in which the line impedance is mainly resistive. In contrast with the conventional droop-control method, the proposed controller uses a virtual resistance without communication signals to achieve good power sharing, which is insensitive to line-impedance unbalances.