bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of a New Fire Detection and Alarm System Based on Self-Organizing Wireless Sensor Networks
Authors: Hu H.B. , Luo W.L. , Liu S.X. , Zhang Y.M.
Published: March 2011

The system is composed of Fire center console, wireless control board, wireless multifunctional fire detector and wireless PTZ camera control system. It is based on string-like network topology self-organizing wireless sensor networks, which adopts Simplici TI network protocol that can reduce power consumption of the system. The system uses BP algorithm program for judging whether there is a fire, uses Wireless PTZ camera control system, which is convenient to install, for real-time monitoring the detect area, uses voice module for fire automatic voice alarm to the fire department and uses Micro-Fire GIS to show the location of a fire. BP algorithm program is embedded in wireless multifunctional fire detector. The samples of BP algorithm were derived from the fire detection standard room of the State Key Laboratory of Fire Science of China. The system is low false alarm rate, low cost, fast response and convenient to install.
Analysis on Anti-Corrosion Technology of New Dual-Plate Air Preheaters
Authors: Guo Zhi Ping , Li Bao Zong , Yang Zhi Dan , Li Dong Wei
Published: March 2011

Unlike ordinary plate air preheater, the new dual-plate air preheater can generate temperature gradient through adding another plate in cold side to maintain certain space. And it can decrease the temperature of hot fluid in the outlet while increasing the temperature of plate surface to achieve the purpose of anti-corrosion.
The Vibration Response Analysis for a Car Left Front Shaft Head Based on User Conditions
Authors: Guo Zhi Ping , Wang Lian Lei , Zhou Wei , Li Wen Liang , Zhang Chao , Li Bao Zong
Published: March 2011

As one of the main reason of fatigue failure, vibration has received more attention in reliability and comfort research on vehicles. The shock from bumpy roads has a great impact to the fatigue of vehicle parts and components. The method of survey user conditions is described for the road test in the article, and three accelerating data of X, Y, Z directions of a vehicle left shaft position have been obtained with the typical user condition. Through studied the data, we have obtained the load spectrum and the power spectral density data of one car. The obtained quantitative results from the analysis can be used for evaluating the comfort of using vehicle.
Research of Filtering Algorithm for Echo of Ultrasonic Wave Based on Wavelet Transformation
Authors: Zhu Xiao Li , Zhang Ze
Published: March 2011

This paper proposes an improved wavelet threshold denoising method, threshold function by selecting different thresholds to filter out the noisy signal. Firstly, do the wavelet transformation for noisy signal, and then use soft threshold, hard threshold and the improved threshold algorithm to denoising the signal, finally realized by Matlab simulation of wavelet thresholding. Threshold denoising via different methods of simulation experiments show that the improved threshold denoising algorithm can effectively filter plate bonding ultrasonic echo signal in the noise detection and can be a good feature to retain the original signal.
A Query Expansion Method Based on User's Historical Interested Web Pages and Historical Query Terms
Authors: Zhu Zheng Yu , Yu Chun Lei , Dong Shu Jia , He Jie
Published: March 2011

Current popular search engines are built to serve all users, independent of the needs of any individual user. A personalized query expansion method based on user's historical interested Web pages (UHIWPs) and user’s historical query terms (UHQTs) is proposed in this paper. When a user submits a query keyword to a search engine, the new algorithm can automatically locate the current user’s implicit search intention and compute the term-term associations dynamically according to the user’s UHIWPs and UHQTs. More personalized expansion terms then will be generated and submitted to the search engine together with the query keyword. As a result, different search results can be returned to different users even though they input the same query keywords. Experimental results show that this method is better than the current algorithm in average precision.
A Simplified Time-Division Based on Road Network Model Considering Intersection Delay for Vehicle Navigation
Authors: Zhu Zheng Yu , Li Jin Yan , Wang Li Na , Liu Wei , Cui Ming , Liu Lin
Published: March 2011

How to model a dynamic road network has great practical significance in a vehicle navigation system. This paper has proposed a simplified time-division based on road network model which implicitly takes into account the delay time at various intersections, the degree of a road congestion and the different road quality, but avoids a complicated calculation and collection for these traffic data. An improved Dijkstra algorithm based on the new model has also been given. The simulation results show that the model can work well and the algorithm is efficient.
Localization of In-Plane Guided Elastic Waves in a Two-Dimensional Solid Waveguiding Phononic Crystal
Authors: Chen A Li , Wang Yue Sheng , Zhang Chuan Zeng
Published: March 2011

Combined with the supercell technique, the plane wave expansion method is used to calculate the band structures for the in-plane wave of the two-dimensional solid-solid phononic crystals with line defects and the random disorders in either radius or location of the scatterers. The influences of the random disorders on the band structures and guided waves will be discussed. Propagation of the wave with one certain frequency in the waveguiding phononic crystals with different disorder degree is studied.
Research on Glass Fiber/Microcellular Unsaturated Polyester Composites
Authors: Zhao Xue Ni , Wan Wu Yong , Ren Wei , Zeng Shan Qi , Lei Jing , Zhou Bin
Published: March 2011

Glass fiber/microcellular unsaturated polyester composites (GF/MCUP) were prepared using the supersaturated gas technology. Technological process included three stages. The effect of processing parameters on average cell size, cell density, impact strength and tensile strength was investigaed by orthogonal experiment. The results indicated that the major factor affecting them was the temperature in stageⅡ(T2). Under the optimizing processing condition, the average cell size of GF/MCUP was about 8 μm and the cell density was 1.57×109 cells/cm3. It was found that impact strength of GF/MCUP increased 88.81 and 188.12 % than that of glass fiber/unsaturated polyester composites (GF/UP) and unsaturated polyester plastics (UP), respectively. The corresponding 16.56 and 69.25 % increase in tensile strength-to-weight ratio were gained over that of GF/UP and UP, respectively.
Effect of Microstructure and Mechanical Properties on Two Body Abrasive Wear Resistance of Medium-Carbon Low-Alloy Steel
Authors: Miao Jun , Wang Li Jun , Liu Chun Ming
Published: March 2011

The effect of microstructure and mechanical properties on abrasion resistance of the medium-carbon low-alloy steel has been investigated under two body abrasive wear conditions. The results show that the microstructure of the test steel is mastenite and bainite/mastenite when the specimen subjected to water quenching and blow cooling respectively. The hardness of the test steel was over 52HRC when the specimen subjected to water quenching and blow cooling, however, effect of tempering temperature on hardness is slightly. The strength of the test steel is increased with the tempering temperature increased and the impact toughness change slightly under the blow cooling condition. The tensile strength of the test steel is decreased and the yield strength is increased with the tempering temperature increased when the specimen subjected to water quenching and followed tempering. The wear rate is increased with load and the wear mechanism is micro-cutting and microploughing. The wear resistance of bainite/martensite is better than single-phase martensite. The hardness and impact toughness are important factor under two body abrasive wear condition.
Survey on Node Mobility Model for Opportunistic Network
Authors: Yang Ming Xia , Han Shuang Xia , Yang Cai Yun , Zhang Lu , Ye Dong Fen
Published: March 2011

Opportunistic networks is one of the newest hot research spots in wireless networks after mobile ad hoc net-works(MANET) and wireless sensor networks(WSN). Mobility model describes mobility manners of nodes. It has been widely used in research on wireless network. This paper firstly introduced, classifies, and compares the current familiar mobility models. Secondly, it classifies, and compares the current familiar mobility models. Next, it was discussed that current research focus on new mobility models, analysis of nodes mobility features, trace strategy, and evaluation of mobility model. Finally, this paper involved what calls for further study.
Finite Element Analysis and Optimization of ZF2800/6/24 Type Hydraulic Support's Canopy
Authors: Zhu Min , Chen Chang Hua , Wang Gang
Published: March 2011

The paper puts virtual prototyping technology,finite element technology and optimal design into the design of hydraulic support for the development status of hydraulic support and the problems in the traditional design. It takes ZF2800/16/24 hydraulic support as a model and establishes the 3-D model of hydraulic support by using Solidwork sofrware, also builds the simulation model of the hydraulic support and does a simulation exereise.The performance of the four link bar is analyzed.By analysing to the canopy which is subjected to torque by using Cosmos software, the paper obtains the stress and strain distribution of all the elements or nodes on the canopy by a graph. From the analysis of the result ,designers can fully and exactly find out the force of all points of the canopy .And this way can also solve the question that there is not enough number of the testpoint in the traditional prototype test. In the meantime, the canopy can be optimized because its biggest stress is far smaller than the allowable stress of the material. And the canopy can be optimized,increase the economic benefit.
FEM Analysis and Study on Plate Mill Housing
Authors: Wang Li Ping , Li Shao Qiang , Piao Jing Wei
Published: March 2011

The strength and stiffness of 4300 rolling mill housing affect the quality of plate much. In presented research a problem that belongs to the stresses, deformations and modal analysis topic was investigated. The finite element method (FEM) and the electrical measuring method were used for the investigation. Modeling, meshing, loading and analysis on the housing are finished by Pro/E and Ansys 10.0. The dangerous point locates on the chamfer of upright and low carriage. The FEM results are larger than those of measuring by comparison. Natural frequencies and main vibration modes of the housing from first to fifteenth step are found. The dynamic bending and twisting deformation are the main factors which affect the dynamic characters of rolling mill. The middle of upright is the weakest position. The results of this article supply the basis for understanding the working state, maintenance and design of the 4300 rolling mill housing.
Small Tooth Number Difference Planetary Gear Drive with a Crank and Oscillating Block Inputting Mechanism
Authors: Cui Jian Kun
Published: March 2011

A new mechanism construction for small tooth number difference planetary gear drive is developed in which the planet wheel is guided by a planar crank and oscillating block mechanism. The sizes of linkage are design dexterously to get an approximate circumference linkage curve so that the engaging condition of internal gear pair can be satisfied. The trajectory of the inner gear center motion is analyzed and its error comparing with a standard circle is calculated to avoid movement interference. The movement of inner gear is study particularly to deduced formula of instantaneous transmission ratio. Despite observable fluctuation of output speed, this new type of gear transmission mechanism still has potential application value in situation with large ratio and low input speed. A hand drive winch prototype using the mechanism is also illustrated in this paper.
Computer Aided Design for PDC Die
Authors: Zhou Si Zhu , Li Chao , Yuan Xin Mei
Published: March 2011

The polycrystalline diamond compact (PDC) is the key component of the diamond bit used in oil drilling. PDC is manufactured by die-cast molding process. The PDC die withstand 1500 degree and 6000 MPa, the designing process is very complex, it is necessary to develop a CAD software for PDC Die, it can improve design efficiency and accuracy. The software has been developed and used in Kingdream Corp. of China for many years.
On an Optimal Linear Control Applied to a Non-Ideal Load Transportation System, Modeled with Periodic Coefficients
Authors: Chavarette Fábio Roverto , Peruzzi Nelson José , Balthazar José Manoel , Barbanti Luciano , Damasceno Berenice Carmargo
Published: March 2011

In this paper, a load transportation system in platforms or suspended by cables is considered. It is a monorail device and is modelled as an inverted pendulum built on a car driven by a DC motor. The governing equations of motion were derived via Lagrange’s equations. In the mathematical model we consider the interaction between the DC motor and the dynamical system, that is, we have a so-called non-ideal periodic problem. The problem is analysed and we also developed an optimal linear control design to stabilize the problem.
Research on a Control Unit of in-Wheel Motor Applied in Mobile Robot
Authors: Yin Qiang , Gao Quan Jie , Chen Xiao Peng , Zuo Jiu Lin
Published: March 2011

Compared with the driving system of traditional motors, the advantages of in-wheel motor are described in this article. A kind of drive control unit of in-wheel motor is designed for mobile robot, and its composition, working principle, hardware and software design are described. Experiments show that the control unit can make a good performance to meet the requirements of mobile robot.
Strength and Deformation Analysis of the Double-Layer Subgrade by Finite Element Method
Authors: Yu Shu Qiang , Qin Peng Ju
Published: March 2011

In the area of alluvial soft soil, the double layer subgrade with rigid upper layer and soft lower layer is common. In such subgrade, the stress diffusion phenomena will occur under vertical load. In this paper, the stress and deformation of such subgrade are studied by ABAQUS. According to the calculation results, the plastic zone of subgrade appears in the upper layer soil of the interface, and then, it expands up and down the interface with the increase of load. The plastic zone expands rapidly in the lower layer soil. Finally, the subgrade gets up to its ultimate bearing capacity when the plastic zone reaches the foundation bottom. This results provides an effective analytical methods to the engineering designers. It has practical meaning.
A Universal Finite Element of Thick and Thin Plate without Shear Locking
Authors: Yu Shu Qiang , Zhang Ming , Fan Lu Lu
Published: March 2011

In order to prevent shear locking, a method using theory of deep beam is proposed. A universal finite element for thick and thin plates is constructed. When the plate thickness approaches to the limit of thin plate, the universal element degenerates to the thin plate element automatically. As a results, the shear locking phenomenon will not appear. The computational results indicate that the current element has high-accuracy and good usefulness.
Reliability Analysis of Uncertain Input Variables for Cracked Structures
Authors: Akramin M.R.M. , Ahmad Zulkifli , Mahat M. Mazwan
Published: March 2011

Probabilistic analysis aims at providing an assessment of cracked structures and taking relevant uncertainties into account in a rational quantitative manner. The main focus of this research work is on uncertainties aspect which relates with the nature of crack in materials. By using cracked structures modelling, finite element calculation, generation of adaptive mesh, sampling of cracked structure including uncertainties factors and probabilistic analysis using Monte Carlo method, the rigidity of cracked structures is estimated. Assessment of the accuracy in probabilistic structures is essential when limited amount of data is available. The hybrid finite element and probabilistic analysis represents the failure probability of the structures. The probability of failure caused by uncertainties relates to loads and material properties of the structure are estimated using Monte Carlo simulation technique. Numerical examples are presented to show probabilistic analysis based on Monte Carlo simulation provides accurate estimates of failure probability. The comparison shows that the combination between finite element analysis and probabilistic analysis provides a simple and realistic of quantify the failure probability.
Study on Fillet Stresses Distribution of Crankshaft of High-Duty Diesel Engine
Authors: Li Wen , Liao Ri Dong , Zuo Zheng Xing
Published: March 2011

Stresses distribution in crankshaft fillet region are mainly discussed in this paper. FEM is used for calculating the stresses. With the analysis of the regional stresses distribution, we concludes that the stresses can be fitted by first order of Fourier expansions, while all the parameters in the expansions can be expressed as second order polynomial expansions.
Electromechanical Coupling Modeling in Permanent Magnet AC Servo-Driven Precision Gear Transmission System
Authors: Zhou Wei , Lin Li Hong , Chen Xiao An
Published: March 2011

Electromechanical coupling effect must be considered in the dynamic analysis of permanent magnet AC servo-driven precision gear transmission system. According to the global coupling and local coupling analysis in servo-driven system, the global electromechanical coupling relation diagram of whole system and the local electromechanical coupling relation diagram of the permanent magnet synchronous motor-precision gear transmission subsystem are established. For this subsystem, a physical model is built up. And a mathematical model is constituted by using Lagrange-Maxwell equation, that is the dynamic equation of the subsystem. The mathematical model can provide theoretical basis for follow-up researches.
Simulations of Bearing Capacity of Foundation on Unsaturated Granular Soils
Authors: Uchaipichat Anuchit , Man-Koksung Ekachai
Published: March 2011

Typically a shallow foundation is chosen to support several types of common structure. Several equations for the ultimate bearing capacity of shallow foundation have been proposed with assumption of fully saturated or completely dry conditions. In fact, almost 40 percent of natural soils on the earth surface are in an unsaturated state. Therefore, the ultimate bearing capacity of shallow strip foundation on unsaturated granular soils is developed in this paper using limit equilibrium concept. The simulations from the developed equation for a laboratory-compacted-sand are performed. The results are carefully presented and discussed.
The Influence of Soft Soil on the Analysis of Soil-Pile Dynamic Interaction
Authors: Cheng Xu Dong , Li Jie , Wang Yong
Published: March 2011

In the seismic design of pile foundation, current research mainly adopts the theory of auxiliary experiences engineering design methods. In particular ground, the pile must be specially designed to meet the seismic requirements. In this paper, with large scale finite element software ADINA,a 2-d finite element entity model is established to calculate and analyze the influence of soft soil to the dynamic interaction of soft pile-soil under the earthquake. The maximum displacements and acceleration of the measuring points on the pile are analyzed in different thickness and position of the soft soil. Calculation results show that: Soft soil effect the maximal displacement and acceleration of the measuring points on the pile which changed with the different thickness and positions of the soft soil. It should be noticed in the design of pile foundation and ground treatment.
Influence about the Cooling Pipe´s Inlet of Bars Pattern on the Cooling Effect
Authors: Zhang Shao Jun , Zhang Hua , Zhu Dong Mei , Liu Guo Yong
Published: March 2011

In this paper, the cooling process of Large-diameter bars is simulated by the 3D numerical simulation calculation method of Finite Element Coupling Field. Then, the influence, which about the controlled cooling inlet pattern on the cooling effect, has been analyzed. The results show that the bar cooling effect of annular nozzle inlet cooling pipe is the best among the several inlet patterns in this paper; relatively the bar cooling effect of four circular nozzles inlet cooling pipe is the worst among the several nozzles patterns in this paper. This numerical simulation result provides reference for choosing inlet pattern of bar controlled cooling equipment.
Decentralized Decision on Emergency Transshipment
Authors: Ma Zhong Hua
Published: March 2011

Utilizing emergency transshipment between two retailers at the end of the season of sales to meet special customer demand can be an effective mean for companies to reduce sale lost cost and/or holding on cost. This paper provides a decision rule for how much (if any) to transshipment, with the condition that the two retailers involved have profit objects and decision made respectively. While the model explicitly of fixed and variable transshipment costs for each of them, it is possible to decide the amount of proposition cost helping to bring about the emergency transshipment.
Evolution of Internal Friction and Boundary Pressure in Dislocated Bearing
Authors: Dai Yu Jie
Published: March 2011

In order to study the influencing factor of hydrodynamics characteristic in dislocated bearing, the evolution of internal friction and boundary pressure is simulated with boundary element method (BEM). The results indicate that boundary pressure increases with the increase of journal’s radius and △R (stagger displacement of bearing). Internal friction approaches minimum value if △R is zero and the dimensionless radiuses of bearing and journal are 1 and 0.45 respectively. The results provide theoretical fundament in the design of high efficient bearing.
Testing and Analysis of the Dynamic Characteristics of Vertical Machining Centers
Authors: Yi Wang , Zhang Jian Fu , Xu Chao , Wu Zhi Jun , Yu Ding Wen
Published: March 2011

This paper analyzed the dynamic performances of vertical machining center and investigated the problems of dynamiccharacteristics. The modal analysis in both experiment and simulation wascarried out to obtain the modal parameters. The vibrations of the machine spindle were tested to obtain the vibration spectrum under different spindle speeds. It synthesized and compared with the vibration and modal characteristic in order to investigatethe weak parts of the structure. It is concluded that modal characteristic has something to do with the vibration, and there is eccentric between the active rotor and driven rotor. This comprehensive comparison method for dynamic analysis is very effective.
A Wideband Monopole Antenna Using Parasitic Elements
Authors: Zhu Ru Sheng , Wang Xue Liang , Yang Guo Yan
Published: March 2011

A novel wide band U-shaped monopole antenna with two C-shaped parasitic elements, suitable for WLAN and WiMAX operations, is pretented experimentally and numerically. The wide-band characteristics are obtained by using the U-shaped patch and the two C-shaped parasitic elements along the CPW signal strip. And the simulated wide antenna yields a 10dB impedance bandwidth range from 2.51GHz to 6.0GHz. The antenna is as small as 20×30×1.6mm3. The investigated antennas have been successfully designed, simulated, showing good impedance bandwidth and omni-directional radiation patterns.
Corrosion Behaviors of 310S and AL-6XN Steels in MgCl2 Molten Salts
Authors: Lu Gui Min , Shang Shu Zhen , Yu Jin Jin , Yu Jian Guo
Published: March 2011

The corrosion behaviors and mechanisms of 310S and AL-6XN stainless steels in MgCl2 molten salts were investigated at 800°C for 8-72h. The weight change kinetics, surface and cross-sectional morphologies as well as corrosion products and compositions were analyzed. The results showed that corrosion velocities of both steels were very high in the preliminary period, then diminished quickly and trended to zero afterward. The AL-6XN steels exhibited better corrosion resistance in MgCl2 molten salts than 310S. The predominant peaks of MgO were detected from both steels after corrosion in molten MgCl2 at 800°C, which could serve as the protective barriers between the alloy and the MgCl2 molten salts. The depletion of Cr was very serious throughout the corrosion layer for both steels due to their preferential oxidation for the formation of an outer corrosion layer. The other elements in alloy were corroded in succession through the outward diffusion with the progress of the corrosion. The outward migrations of the metal ions led to the coalescence of vacancies to form the voids. The two steels possessed the uniform corrosion behavior.
Synthesize and Evaluation of Electrospun Perovskite (Ba0.5Sr0.5Co0.2Fe0.8O3- δ) Nanofibers for Intermediate Temperature Solid- Oxide Fuel Cell
Authors: Shahgaldi Samaneh , Yaakob Zahira , Khadem Dariush Jafar , Wan Daud Wan Ramli
Published: March 2011

In recent years, one dimensional nanostructure, nanofibers with unique properties have been subjected of intense research due to potential properties in many applications. This study presents synthesize of Perovskite-type Ba0.5Sr0.5Co0.2Fe0.8O3−δ (BSCF) nanofibers using sol-gel via electrospinning as a cathode for intermediate temperature solid oxide fuel cell. BSCF nanofibers are prepared by treating electrospun polyvinyl Pyrrolidon/ Ba0.5Sr0.5Co0.8Fe0.2O3−δ composite fibers at high temperature in an air atmosphere. BSCF nanofibers were characterized by x-ray diffraction (XRD) to observe desired structure, scanning electron microscopy (SEM) to investigated the morphology of fibers, and Brunauer, Emmett and Teller (BET) for measuring the surface area. To the best of our knowledge, investigation on Ba0.5Sr0.5 Co0.2 Fe 0.8O3−δ nanofibers has not been reported up to now.
Mathematical Model and Error Analysis of Coordinate Measuring Arm with Revo Revolving Body
Authors: Zhao Lei , Liu Shu Gui
Published: March 2011

A new type of coordinate measuring arm with a Revo revolving body which can realize quick measuring in spherical domain has high stability, fast measuring speed and high accuracy compared with common coordinate measuring arm. We use the method of space coordinate transformation to solve the problem that the transformation matrix can’t be got from Revo body to test head by DH method, and apply DH theory to build the mathematical model of system. The system model is verified right by sketching. The error model is built and the effect of measurement accuracy from all error sources is deeply analyzed. It presents a theory foundation for further researching on improving accuracy of this new type of coordinate measuring arm.
Experimental Research on Influence Factors of Thermal Contact Resistance between Joints
Authors: Zhao Hong Lin , Li Dian Xin , Huang Yu Mei , Gao Feng , Yu Jia , Wang Bo , Mu Dong Hui
Published: March 2011

Contact heat transfer are widely used in mechanical system and research on thermal contact resistance is a significant link in engineering application. In this article, main influencing factors of thermal contact resistance such as material characteristics, contact pressure, surface roughness, intermediate medium had been further researched by experimental methods, and the relations between pressure and thermal contact resistance had been taken under different materials, different suface processing quality and different medium. Several other problems related to thermal contact resistance had also been discussed. The research contents provide reference for the application of thermal contact resistance and reasonable design of mechanical structure.
Improve the Control of Residential Heating Systems
Authors: Jassar Surinder , Liao Zai Yi
Published: March 2011

A recurrent neuro-fuzzy based inferential sensor is applied to design an inferential control algorithm that can improve the operation of residential heating systems in which both energy efficiency and indoor environment quality are below expectation due to insufficient control. In current practice, the control of these heating systems is based on the measurement of air temperature at one point within the building. The inferential control strategy presented in this paper allows the control to be based on an estimate of the overall thermal performance, minimizing the chance of overheating (saving energy) and underheating (improving comfort) in the building. The performance of this control technology has been investigated through simulation study. The results show that the proposed control scheme can effectively maintain the temperature at set-point, and results in energy savings and improved thermal comfort.
Interface Structure and Properties of Explosive Welded Beryllium Bronze/Steel Composite Plates
Authors: Zhang Guo Shang , Hou Shu Zeng , Wei Shi Zhong , Li Ji Wen , Xu Liu Jie
Published: March 2011

In this study, beryllium bronze/steel composite plates were fabricated through explosive welding process using different ratios of explosive. Microstructures of the joint were examined, and then shearing strength, peeling strength, Bending tests and hardness measurements were carried out on the bonded specimens. Experimental studies show that, beryllium bronze and steel could be bonded with a good quality. The interface is wavy texture changing in turns from flat - wavelet - large wave - stable large wave beginning with initiation point. Grains near the interface are elongated parallel to the explosion direction. As the ratio of explosive increase, the amplitude and wavelength of wave are increased, which leads to the increasing of shearing strength and bonging strength. No shearing in the interface is seen from the tensile-shear tests and fracture take place in the low strength material. The bended specimens show that defects such as separation and tearing were not observed. Hardness is increased with increasing explosive ratio and the highest hardness values are obtained near the bonding interface.
Aerodynamic Simulation of High Speed Container Flat Wagon
Authors: Tian Dan , Zhang Ji Min , Wang Yong Qiang
Published: March 2011

Through the external flow analysis of 200 km/h high-speed container flat wagon utilizing SST k- turbulence model, we got the surface pressure distributions, flow field, locomotive resistance, containers resistance and so on. The researches show that pressure drag dominates large resistance of high-speed container flat wagon; the size difference between locomotive and container as well as the gap between vehicles will complex the flow in return increase the total aerodynamic resistance of train; due to the influence of bottom flow, the pressure drag of middle container with bogies is smaller than without, but still large.
Aircraft Platforms Vibration Measurement System Design and Verification
Authors: Zhu Shu , Wang Guang Lu , Chang Hai Juan
Published: March 2011

For acquiring the data about how did the aircraft platforms environment impact on its equipment, designed a measurement system for measuring aircraft platform environment. How to select the measurement position, where did the system install and how to verify the system parameter measurement precision are introduced in this article. Finally, according to the using environment a environment test was designed to verify the environmental worthiness of the system.
A Distributed MDS-MAP Algorithm for Wireless Sensor Networks
Authors: Zhang Lu , Han Shuang Xia , Fan Wei , Yang Ming Xia
Published: March 2011

Aiming at the deficiencies of positioning accuracy and matrix operating complexity in the classical MDS-MAP locating algorithm in WSN, a distributed multi-dimensional scaling-MAP algorithm (MDS-MAP (D)) was proposed in this paper. In this algorithm, the distance of the nodes was quantified to obtain the close-neighbor vector (CNV), the distance matrix D and the initial value of nodes location was calculated. Theoretical analysis and simulation experimental results show that, the advance algorithm can realize the positioning of sensor nodes with good accuracy.
The Control Research of Neural Network on Barrel Temperature of the Plastic Injection-Molding Machine
Authors: Lai Wu Jun , Chen Shuang
Published: March 2011

The temperaturel contror of injection molding machine barrel was acted as the research object in this paper, by combining artificial neural network with SPIDNN ,we created the basic structure and algorithm models of neural network on the injection molding machine barrel temperature control. Using of Matlab, control of the neural network on barrel temperature was simulated, the quite satisfactory control effect had obtained. The results show that the control strategy proposed can effectively improve the injection molding machine barrel temperature control accuracy, there is important reference value for temperature control of injection molding machine barrel.
A New Product Information Model for ERP Systems in Assembly-to-Order Environment
Authors: Wang Gui Cong , Cui Huan Yong , Tian Xi Jie
Published: March 2011

Basically, present enterprise resource planning systems (ERP) do not perform well in an assembly-to-order (ATO) environment due to the lack of effective management of product varieties. To support customized requirements and frequent engineering changes (ECs), we propose a manufacturing-oriented product information model (OMPIM), which consists of item property information and structure information. The proposed model has been applied to an ERP system of an automobile plant.
Adaptive Force/Position Control Law of Nonlinear Robotic System
Authors: Jiang Chun Di , Wang Hai Lun , Zhang Lu
Published: March 2011

Based on the reference [1], this paper presents an adaptive control law of nonlinear robotic systems. The performance of robot system is testified by a simulation example of 2-dof robots system and doing experiment in SRV-02 equipment which is made in Canada, the results obtained are satisfactory and the tracking error is negligible.
Formation and Control of Inclusions during Steelmaking Process
Authors: Li Yang , Jiang Zhou Hua , Yin Shi You , Zhuang Ying , Li Ming
Published: March 2011

The variation of non-metallic inclusions and total oxygen contents in different steel grades were investigated by taking samples in steelmaking process, including gear steel, anchor chain steel, hard wire steel, bearing steel and spring steel. The inclusions mainly were Al2O3, MnS, and their composite inclusions in aluminum killed steel at the beginning of LF refining due to addition of FeAl alloy during the tapping from EAF and feeding of Al wire in LF process, and then Al2O3 inclusion changed to the Al2O3 - CaO composite inclusions after feeding of SiCa wire. The inclusions at the beginning of LF refining mainly were MnS, SiC and their composite inclusions in non-aluminum killed steel due to addition of the composite deoxidation and slagging agents (mainly including CaC2 and SiC) when EAF taping, while the inclusions in tundish mainly were MnS, CaO - SiO2 - Al2O3 composite oxide - sulfide inclusions. It is showed that the inclusions in bearing steel and spring steel samples were mainly globular oxide inclusions and silicate inclusions with higher rated results. Therefore, the refining process should be improved to remove globular oxide inclusions. The inclusions in molten steel were controlled by enhancing the diffusion deoxidation process, adjusting and controlling the basicity and composition of refining slags, respectively, and satisfactory results were obtained. The industrial test shows that the total oxygen content of the aluminum killed steel in the test heat after feeding wire reached the minimum value, which indicates that the optimized slag has a strong ability of absorbing Al2O3 inclusions. For non-aluminum killed steel, the total oxygen content was 0.0027 % to 0.0029 % in rolled products. The inclusions in the end of refining and rolled product were small and dispersed composite inclusions, and the separate Al2O3 inclusions can not be found in the non-aluminum killed steel after optimization of the refining process.
Dynamic Analysis of Cross Simulator
Authors: Yang Xu Dong , Jin Liang Liang , Li Jia Chun , Jin Zhi Qiang , Zhao Jin
Published: March 2011

The finite element model of cross simulator including supporting structure, beam, etc. was set up in the environment of ABAQUS. After the static analysis which meets the requirements, the model’s dynamic characteristics when bearing impact load was obtained using explicit method according to modal analysis results. Comparing different analysis results with technical index, it indicates that larger impact load makes the dynamic characteristics worse significantly.
Development of a Novel Fiber Optic Sensor for On-Line Monitoring of Soymilk Coagulation
Authors: He Peng , Zhou Zhen , Wang Na
Published: March 2011

Mechanical evolution of soymilk coagulation was investigated using a novel fiber optic sensor in order to solve the problem of instability in Chinese traditional tofu quality. The sensor signal was measured, and studied the effects of temperature, soymilk concentration, and calcium chloride solution concentrations on tofu making parameters. The scattering light ratio followed a sigmoid increase during soymilk coagulation. Tofu firmness, tofu moisture content, and tofu yield were predicted from the time to the maximum slope of the first derivative of scattering light ratio. The proposed mathematical model shows potential for on-line monitoring of soymilk coagulation.
Dynamic Characteristics of a Jetting Dispenser for Wafer Die Marking
Authors: Zhang Lue , Hu Hong , Cao Yong
Published: March 2011

Ink marking is a key process for die sorting of IC wafer manufacturing. Intensive production of wafer is urging the inkers for more rapid and more stable ink marking performance on surface of defective wafer dies safely. In this paper, a non-contact jetting dispenser is introduced to the wafer die marking. After presenting the mathematical description of dynamic fluid for 2-phase flow, numerical simulations are launched to reveal the characteristics of droplet generation and key factors are discussed. A jetting dispenser is developed and experimental results are analyzed. According to the simulative results and the dotting performance shown in experiments, the non-contact jetting dispenser is capable for wafer die marking in dotting efficiency and stability.
Crack Detecting by Carbon Fiber Polymer-Matrix Layer
Authors: Fang Xi , Li Zhuo Qiu , Zhu Si Rong , Lv Yong
Published: March 2011

Carbon fiber (CF) is an essential functional material focused on widely, especially in civil engineering. The mechano-electric character of carbon fiber layer based on the polymer-matrix and its sensing application to the pre-embedded crack detecting were experimentally discussed in this paper. Through the uniaxial tension the CF layer reveals a good performance by resistance changing with response to the loading. By three-points bending test, the crack of the structure would lead to an evident increasing of the resistance change ratio of CF layer. From the experimental results, the ratio of resistance increasing of CF layer laid on crack will be higher by 14.25% in average than that of CF layer with no crack laid. Thus carbon fiber mat composed with polymer will provides a new kind of potential sensor which can detect the defects of the structure.
Reliability Method to Estimate Shear Strength Parameters
Authors: Chen Li Hong , Zhao Yu Fei
Published: March 2011

The design and safety evaluation of a geotechnical project is influenced by the shear strength parameters of geo-material. Moment method and linear regression method are the mainly used methods to estimate the shear strength parameters. But moment method is always over estimate the variation of strength parameters due to the smaller sample size, meanwhile the conventional linear regression method cannot obtain the standard deviation. Base on the reliability theory, a new method employing Solver add-in of spreadsheet was developed to calculate the shear strength parameters. The method was simplified by the principle that the shortest distance form origin point to the limit state surface in the normalization space was the reliability index. Four hundred and four samples of direct shear tests of rock mass from many large hydraulic projects in China were analyzed by four statistic methods including the new proposed one. Comparing results of different methods indicated that the new reliability statistic method had good performance than the traditional ways.
Analytical Method to Equivalent Modulus of Entrainment Multiphase Composite
Authors: Lai Jin Xing , Zhang Qian
Published: March 2011

Energy equivalent modulus medium of entrainment multiphase composite body is one of main methods, Those methods study frangible materials damage in micromechanics. Through studying the physical and mechanical process of microstructure varity, we can introduce some kind averaging method to find the material’s macroscopic property. It has not been studied as yet that we study entrainment composite body’s damage trough introducing continous field variable of every exponent tensor from macrophenomenology angle. This paper regards entrainment multiphase composite body as the micropolar medium of introducing inner structure. It provides analytic formula to describe equivalent modus of entrainment multiphase composite body damage, through the stress in micropolar theory of elasticity,couple-stresses tensor and Helmhoetz degrees of freedom density.
Improved Taylor-Series Expansion for MS Location Estimation
Authors: Chen Chien Sheng , Lin Yung Chuan , Liu Wen Hsiung , Shou He Nian
Published: March 2011

The objective of wireless location is to determine the mobile station (MS) location in a wireless cellular communications system. Due to the measurement with large errors, location schemes give poorer performance in non-line-of-sight (NLOS) environments. To determine MS location, Taylor-series algorithm (TSA) is commonly used scheme. TSA can give a least-square (LS) solution to a set of simultaneous linearized equations. The disadvantage of TSA is the need for an initial position guess to start the solution process. The iteration process may not converge due to a poor initial estimate of the MS location. To improve the location accuracy with less complexity, the initial MS location selection criterion is proposed. Numerical results demonstrate that the proposed criterion always provides more accurate positioning.
An Approach of Constrained Damping Design and Application for the Fine Stage
Authors: Gao Ling Fei , Zhang Ming , Zhu Yu , Wang Jing
Published: March 2011

High dynamic property is a major object in fine stage design, as well as high stability. To raise structural damping is a feasible and effective method. In this paper, an approach is advanced by choosing parameters of structural damping for fine stage, via analysis of the loss factor of the structure. Through the experimental verification, this method could double the damping ratios, and be applicable to the same structures without changing the original interface.
The Buckling and Dynamic Analysis of Composite Grid Stiffened Structure
Authors: Liang Wei , He Yu , Yang Lu Lu , Sha Lin
Published: March 2011

In this paper, a refined model of interlocked composite gird stiffened structure and an equivalent model based on simplified ICG panel are built. Buckling and dynamic response of the composite panel are then analyzed using the models. The result is the accuracy of buckling and mode analysis of refined model is greatly improved compared with the equivalent model. Simulation for impact response under different impactors is considered. The coefficients such as material properties and structure dimension of the slot are discussed.
Research on Impact of Fiber Strength in Pulp Blowing
Authors: Qiao Li Jie , Chen Hai Feng , Shi Nuo
Published: March 2011

Based on the research of mechanism of energy conversion in blowing process, design and manufacture a couple of damper and expander. The experiment simulates hot blowing process with the damper and expander. Main paper properties and the fiber microstructure are examined. The results show that flash vaporization and its negative influence on pulp properties can be avoided when hot blowing using damp.
Using Fuzzy Preference Relations to Predict the Success Possibility of Implementing the Oceanographic & Meteorologic Integration Orchestrator
Authors: Chen Wen Ting , Shih Ching Tien , Tsai J.C.
Published: March 2011

This study proposes an analytic hierarchical prediction model based on consistent fuzzy preference relations to help the organizations become aware of the essential factors affecting the implementation oceanographic & meteorologic Integration Orchestrator. Pairwise comparisons are used to determine the priority weights of influential factors and the ratings of success or failure outcomes amongst decision makers. The subjectivity and vagueness in the prediction procedures are dealt with using linguistic terms quantified in an interval scale [0,1]. Then predicted success/failure values are obtained to enable organizations to decide whether to initiate knowledge management, inhibit adoption or take remedial actions to increase the possibility of successful oceanographic & meteorologic initiatives. This proposed approach is demonstrated with a real case study involving seven influential factors assessed by eleven evaluators solicited from a semiconductor engineering incorporation located in Taiwan.
Optimal Statistical Tolerance Allocation of Assemblies for Minimum Manufacturing Cost
Authors: Cheng Kuo Ming , Tsai Jhy Cherng
Published: March 2011

This paper explores a systematic method for optimal statistical tolerance allocation using the Lagrange multiplier method for minimizing manufacturing cost subject to constraints on dimensional chains and machining capabilities. The reciprocal power and exponential cost-tolerance models for statistical tolerancing are investigated for employing this method. The optimization problem is solved by applying the algorithmic approach. Especially, we further derive a closed-form expression of the tolerance optimization problem for reciprocal exponential cost-tolerance model by introducing the Lambert W function. For constrained minimization problems with only equality constraints, the optimum tolerance allocation can be obtained by solving simultaneous equations without further differentiating. An example is illustrated to demonstrate this approach. The result also shows that tolerances can be allocated quickly, economically and accurately using this method.
Graph-Based Process Planning for Rotational Part Machined with Tolerancing
Authors: Cheng Kuo Ming , Tsai Jhy Cherng
Published: March 2011

This paper investigates a methodology and corresponding graph modeling of process planning for cylindrical machined parts with tolerancing. Methods and techniques for representing possible process plans, reducing the complexity and eliminating over-toleranced plans are developed. The method first maps each feature of a part into feasible finishing processes that are capable to achieve the specified tolerances associated with the feature. All possible process plans are then developed by expanding preceding processes of each finishing process. The expanded processes form a graph, or a forest, with processes as nodes and process sequence as links. Processes with same specifications can be further merged and pruned to reduce the complexity of the graph. Tolerance stack-up of each possible plan for simplified results is also further computed by tolerance chart such that over-toleranced plans are eliminated. As there are often many feasible plans for machining a part, the qualified plan that satisfies design specifications is achieved by traversal through the graph imposing tolerance chart. An example is also demonstrated to illustrate the approach and the model. The merit of this method is to employ a unified graph model for representing and reasoning.