bluuebunny/crossref_metadata_2025 huggingface dataset:
Inverse Kinematics and Dynamics Simulation of a Dredging Clamshell
Authors: Xiong Qiao , Xiao Han Bin
Published: August 2013

This paper proposes a problem of flat dredging because of the phenomenon of overdredging casuing bottom roughness in dredging engineering and presents the formulation of the inverse kinematics and dynamics simulation of a dredging clamshell. A dynamical model of dredging clamshell is built based on Adams and the position analysis is firstly performed by adding a general point motion to the dredging clamshell. By analyzing and solving kinematics equations in inverse, movement curves of the steel wire ropes are obtained, and the pulling force curves are acquired by dynamics simulation. The results show that the method automatically generates inverse dynamic solutions and the movement curves are intuitive and can offer help to the flat dredging control scheme effectively.
Mechanics Modeling for Bearing Rigid-Flexible Coupling Multi-Body System Based on ADAMS
Authors: Zhen Jun Wei , Cui Ling Li , Chen Xue
Published: August 2013

Rigid-flexible coupling model is the most common mechanics model for multi-body system, and discovering the law of multi-body system modeling is an important part of the study on multi-body mechanics. This paper uses finite element analysis software PATRAN to make flexibility treatment on the parts of deep groove ball bearing, combines with the virtual prototype technology and establishes the multi-flexibility body rigid-flexible coupling model which can truly reflect the dynamic characteristics of the bearing, and discusses the process and the matters needing attention for generating modal neutral file, realizes the precise modeling for fault bearing, and provides a new method for using virtual prototype to create model.
The Nonlinear Vibration Characteristics of Gear Swing System of Overload Swing Angle Milling Head
Authors: Yang Wen Tong , Yang Shen Teng , Guo Tie Neng , Liu Zhi Feng , Cai Li Gang
Published: August 2013

The overloaded swing angle milling head is an important part of the CNC machine tools; the swing system is the drive components of overloaded swing angle milling head for feed movement, mainly by gears for cutting the feed motion. In this paper, a multi-degree-of-freedom nonlinear dynamic model with multi-level multi-backlash spur gears was established, by using of numerical analysis method to solve the analysis of gears wing nonlinear vibration characteristics of the system, the results show that the gaps between the gears have a rich nonlinear characteristics of the vibration of the system.
Evaluation of the Uncertainty in Constant Speed Fuel Consumption Test
Authors: Tong Jing , Zhao Jian
Published: August 2013

With the growth of vehicle ownership, a great quantity of yearly oil import is necessary in China. Because of the energy shortage, people are forced to pay more and more attention to the automobile fuel economy, and government and automotive manufactories are forced to pursue the ways to reduce the vehicle fuel consumption. As the fuel economy has to be evaluated by the measurement of fuel consumption test, the accuracies of these tests are also attracted more and more attention. In this paper, various factors influencing the constant speed fuel consumption are analyzed. Furthermore, a feasible evaluation method of the measurement uncertainty is proposed, and the expanded uncertainty of the test results is calculated using this method.
An Adaptive Threshold Algorithm Based on Satisfactory Filtering Principle
Authors: Gou Lin Feng , Han Bing Jie
Published: August 2013

In this paper, the problem of designing a adaptive threshold for Fault diagnostic in Full Authority Digital Engine Control system that are subject to environmental disturbances and various input is investigated. According to aero-engine small deviation linearization model, state matrix perturbation model with "soft boundary" pseudo normal distribution is built. The proposed algorithm bases on satisfaction filtering principle. Linear matrix inequality (LMI) method is applied to get upper bound of residual. With the residual distribution probability model and the target false alarm rate, the optimal threshold is determined. The proposed algorithm is then applied to sensor fault detection on a turbofan aero-engine. Simulation results demonstrate and validate the performance and capability of the adaptive threshold algorithm.
Research on Public Transportation Based on Complex Network and Multi-Agent Simulation
Authors: Liu Shang , Dong Shao Hua , An Qing Hu
Published: August 2013

This paper uses genetic algorithm to optimize public transportation network by extracting the topology of a local public transportation network as an instance. An optimization model is formulated and characteristics of the optimal network are analyzed. A simulation using multi-agent simulation software NetLogo is successfully implemented to verify the optimal results. Results show the validity of optimization in public transportation network by the proposed genetic algorithm. From the study, it is also found that NetLogo is of great advantage for simulation verification in complex networks.
Grey New Information GRM(1,1) Model and its Application Based on Reciprocal Accumulated Generating and Background Value Optimization
Authors: Cai Yue Hua , Xiao Wei Yue , Zeng Bin
Published: August 2013

As the monotonic decreasing data the traditional grey model is characteristic with low accuracy, using reciprocal generating operation, making full use of the new information, optimizing the background values, the formula of the parameters was induced and the grey new information GRM(1,1) model was established based on reciprocal accumulating and background value optimization. It provides a new way for the grey model. The examples show the new information model has high accuracy than the non-new information model.
A Flexible Chain Conveying System with Workpiece Model Marking
Authors: Yuan Gui Dong , Li Cui Ying
Published: August 2013

This paper show a flexible chain conveying system with workpiece model marking, which could meet the need of the flexible manufacturing system for the processing different types products on a single product line. By using the hall switches and forming a various placement arrangement of the magnet sheets adhering to the workpiece carrier bracket on the conveyor belt; the identification results give a good correspondence one by one between the part and the type information. The workpiece carrier on the entire conveyor belt can be changed flexibility by changing the magnet sheets placement at the same time, because of the easy replacement of the magnet sheets. With the help of PLC control system, it turn to reality to complete automatically feeding work with discharge manipulator or unloading manipulator, to convey and unload automatic material delivery process. The use of chain transmission combined with the energy consumption braking can realize the accurate positioning of the belt when parking.
Research of a General Method for the Data Migration in Cutting Parameters Database of Industry-Oriented Applications
Authors: Wang Dan , Liu Qiang , Yuan Song Mei
Published: August 2013

This paper is based on a numerical control milling cutting parameters database, DataCut, which is constructed on SQL Server. This paper focuses on a normal measure to separate and combine databases. This kind of measure can transfer databases, which are from different areas, into metabases of cutting parameters database of industry-oriented applications, and then combine them. This will take advantage of all the resource, and help to build a cutting parameters database of industry-oriented applications. Besides, in order to protect the commercial secrets of different areas expertise, this database system should also be able to be used separately. This normal measure has been applied to an experiment, which realized the combination of databases.
The Wear Behavior of Shots Impeller Pair in Shot Blast Cleaning
Authors: Song Ling Hui , Wang Shou Ren , Wang Ying Zi , Song Pei Long , Xue Guang Ji
Published: August 2013

This article discussed the compound impact-abrasive wear behavior of shots impeller pair in shot blast cleaning. The shots impeller pairs were fabricated by investment casting processing. The predominance and shortcoming of investment casting for high chromium wear resistance materials used in shot blasting machine were also analyzed. Using investment casting technology, the high-Cr iron casting would be improvement in interal and explicit quality. And, owing to different included angles of shots, the blade show different wear behavior. The ideal included angle of shots is 12o. Increase in the angles leads to decreases of the wear resistance.
Design of an Active-Gm-RC Reconfigurable Filter for the Multi-Mode Receiver
Authors: Qian Lei , Fan Xiang Ning
Published: August 2013

Based on TSMC 0.18m RF CMOS process a reconfigurable low-pass filter (LPF) is presented in this paper. The LPF adopts active-Gm-RC structure. By manually adjusting the capacitor arrays, the LPF can switch working mode and correct frequency offset caused by process deviation. The pre-layout simulation shows that with 1.8V power supply, the bandwidth ranges from 1.4MHz to 9.8MHz with a step of 1.4MHz. The out of band attenuation is about-80dB/10 octave and the power consumption is 0.43mW .
Multi-Objective Technologic Parameter Optimization of Face Milling Based on GRA-PSO Algorithm
Authors: Tang Dong Hong , Han Yue
Published: August 2013

The development and characteristics of Steer-By-Wire is introduced and the design of Steer-By-Wire in articulated wheel loader is fully discussed in this paper. The whole system takes advantage of proportional decompression valve to control the motion of preferential flow amplifier valve, and further to achieve steering by controlling steering cylinder. Whats more, this paper has also elaborated on a design of new-type steering angle detection devices of vehicle frame, which aims at more accurate corner detection and is also a breakthrough in steering system of wheel loader.
A Hybrid Approach Based on the Fuzzy AHP and Benefit Cost Analysis to Evaluating Cutting Blade Alternatives
Authors: Xu Chen Wei , Yao Jin , Li Jun
Published: August 2013

The cutting blade selection has been important issue for manufacturing systems due to the fact that it might affect productivity, precision and manufacturing cost. It is a multiple-criteria decision making problem for evaluating blade alternatives. In this paper, the hybrid approach is discussed,which combined the fuzzy AHP and benefit cost analysis. An improved AHP method based on triangular fuzzy number is used to analyze the cutting performance of blade alternatives. It can make up for the deficiency in the conventional AHP. Furthermore, the benefit cost analysis is carried out to evaluate the economic performance of alternatives. The benefit cost ratio is calculated by using the fuzzy AHP score and tool consumption cost. Tool consumption cost is obtained in consideration of tool service life and procurement cost. The optimal blade alternative with highest benefit/cost ratio can be found out. In addition, the proposed approach is also illustrated on a sample case study.
Study of the Knife-Gap Adjustment for Rolling-Cut Bilateral Shear
Authors: Zhang Yu Bao , Zhang Da Zhi , Jin Meng
Published: August 2013

The knife-gap accuracy of rolling-cut bilateral shear is one of the key factors influencing the cutting quality. This paper through the site of a high strength low alloy steel shear test, a linear regression equation for the relation between knife-gap and plate thickness is obtained and optimize by using MATLAB Toolbox, after optimization of the linear regression equation can be conveniently used, reduce knife-gap adjustment time, improve production efficiency, reduce shearing defects.
Application of Temperature Forecasting in Cupola Melting Process Based on BP Neural Network
Authors: Sun Xiao Yu , Zhou Jian Xin , Sun Liang , Wang Hong
Published: August 2013

In cupola melting process, the temperature of molten iron is an important indicator of the quality of cast iron. Its difficult to optimize the design because of the varicosity of influencing factors in cupola melting process. This article established a BP neural network model to forecast the temperature of molten iron in cupola melting process, thus use the genetic algorithm to optimize the model. Comparing the average errors of the temperature of molten iron before and after optimization, it indicated that the BP neural network model using genetic algorithm optimization forecasted the actual situation in cupola melting more accurately.
Numerical Analysis of Temperature Field of Co-Based Alloy Coatings by Laser Cladding on the Mild Steel
Authors: Ding Lin , Li Ming Xi , Zhu Xiu Chuan , Jiang Hong Yun
Published: August 2013

In order to analyze temperature field of Co-based alloys laser cladding, the model of Co-based alloys laser cladding with preset-powder method has been made by finite element method. The temperature field of coatings was analyzed by SYSWELD software, and Experimental verification is done. The results showed that temperature field changed from non-steady-state to steady-state in the laser cladding process. Favorable metallurgy bonding with 8.26% dilution was obtained by scanning velocity was 5 mm/s, the temperature gradient of surface coatings is obviously decreased to 1/20 of bonding interface, the solidification rate of surface is nearly 70 times of bonding interface. Right power with 1.6 kW and 1.87 kW was found when scanning velocity was 3 mm/s and 4 mm/s by SYSWELD software. Based on solidification theory, shape factor of crystallization are analyzed, these are consistent with experimental results. These results provide reference and guide for parametric optimization and control dilution rate of laser cladding. Key words: Laser cladding, Co-based alloy, SYSWELD, Simulation
Study on the Microstructure and Oxidation Properties of near Eutectic Nb-Si Alloys
Authors: Jiang Yong Jun
Published: August 2013

In this paper, we report a significant improvement in Microstructure and oxidation roperties of near eutectic NbSi alloys by the addition of aluminum (Al) and control of microstructural length scale. A comparative study of two alloys Nb-18.79at%Si and Nb-12.3at%Si-9at%Al were carried out. The processing for microstructure refinements were carried out by vacuum suction casting in water cooled thick copper mould. It is shown that addition of Al suppresses Nb3Si phase and promotes βNb5Si3phase under nonequilibrium solidification condition. The microstructural length scale and in particular eutectic spacing reduces significantly to 50100 nm in suction cast ternary alloy. The indentation fracture toughness of Al containing suction cast alloy shows a value of 20.2±0.5 MPam which represents a major improvement over bulk NbSi eutectic alloy. The detailed thermal studies confirm a multifold improvement in oxidation resistance up to 1000°C.
The Research on Information Fusion Methods of Leakage Failure Mode Identification of Hydraulic Cylinder
Authors: Zhao Xiu Xu , Zhou Chuan Li , Hu Zhe Min , Zhang Wei Bin
Published: August 2013

The hydraulic cylinder is an important actuator in hydraulic system, and its leakage has a great influence on the performance of the hydraulic system. Therefore, researching the accurate identification of hydraulic cylinder leakage fault is very important to eliminate leakage fault as soon as possible. Based on the fault mechanism, the paper proposes a fault diagnosis method for hydraulic cylinder based on displacement signal and pressure signal fusion. BP neural network and DS evidence theory are respectively used for fault mode identification. Through the research, it is found that combining the two methods can improve the identification accuracy of hydraulic cylinder leakage failure mode.
Thermal Kinetics Phase Field Model for the Metals' Solidification - Mathematic Derivation of the Dendrite Growth Phase Field Variable Diffusion Model
Authors: Ding Heng Min , Pu Lv Chun
Published: August 2013

Phase field equations for simulation of dendritic growth have a history of nearly twenty years. The existing phase field equations are directly derived through the Ginzburg-Landau equations. However, though widely used, the physical meaning of each variable in the equations is not clear. So the domestic and foreign researchers have made a lot of mistakes and interpretation. In this paper, with the solid fraction as a phase field variables in the field, based on thermodynamics and heat transfer theory, author gives a rigorous scientific phase variable diffusion model of the pure metal solidification and its derivation process.
Research on the Process Parameters of W-Mo-Dy Co-Diffusion by Plasma
Authors: Wu Wei Qin , Gao Yuan , Zhang Yan , Zhang Wei , Wang Cheng Lei , Ma Zhi Kang , Cai Hang Wei
Published: August 2013

W-Mo-Dy alloying layer were prepared on the surface of different carbon content of steel by plasma alloying technique and the optimum parameters were obtained under the experimental conditions. The optimal process parameters are as follows: Source material is Φ 5mm × 30mm tungsten and molybdenum wire, the number of W:Mo is 2:8, spacing is 10~15mm; Rare earth Dy using an independent plate source and evenly arranged on the Φ 100mm the barrel auxiliary cathode; the source voltage is-850~-900V, the cathode voltage is-700~-750V, the limit vacuum is 2Pa; the working pressure is argon gas, gas pressure is 30pa, the insulation temperature is 1020°C; the holding time is 4.5h. Available to meet the test requirement and obtain the alloying layer thickness is 128um.
Study on the Effect of Cone Diameter on the Flow Characteristic of Hydraulic Poppet Valve
Authors: Shi Jin Yan
Published: August 2013

This paper adopts the Computational Fluid Dynamics(CFD) method to analyze the different inner structure of hydraulic poppet valve, under different cone diameter it gains the value of flow characteristic of hydraulic poppet valve in different uncork. And it gives suggestions for the structure design of hydraulic poppet valve.
Tread Rubber Material Oxidation Experiment and Influence on Tire Performance
Authors: Wang You Shan , Cui Zhi Bo , Liu Qiang , Wang Jun
Published: August 2013

In this article, tire tread rubber material is analyzed. An experiment is designed to investigate the oxidation resistance property of the material. The micro-morphology is studied by using SEM and the amount change of chemical elements in the material is investigated by EDS. The hardness, permanent deformation and modulus are tested on the aged specimens. At last, rough analysis for these changes influence in tire performance are done correspondingly. The results show that the modules, hardness, compression permanent deformation have great changes, the microscope show that there are micro cracks in the aged rubber material, the elements also have great changes. And the analysis shows that the tread rubber oxidation has a great influence on tire performance.
A Study on Early Apoptosis of Hepatoma Bel-7402 Cells In Vitro Treated by Altering-Electric Magnetic Field Exposure of Extremely Low Frequency Combined with Magnetic Nano-Fe3O4 Powders
Authors: Chen Zhi Qiang , Wen Jian , Tu Wen Yong , Xiao Li , Fang Zheng
Published: August 2013

An investigation was made on the early apoptosis of hepatoma Bel-7402 cells, which were cultured on the magnetic nanoFe3O4 powders in different diameters (MNPs) in vitro, by an altering electro-magnetic field (ELFF) exposure of extremely low frequency. MNPs would strengthen the ELFF effects on the cell metabolism, and the effects were dependent on the diameter of powders. The experiments showed that MNPs could not influence the cell physiology obviously. However, ELFF exposure would inhibit the cell proliferation because some cells were arrested at G0/G1 period and the early apoptosis was induced with significant difference (P<0.05) as compared with the control group. The combination of MNPs with ELFF could strengthen the ratio of cells arrested at G0/G1 period and induced early apoptosis. As compared with the control group and the radiation group by ELFF with effects to cells ion metabolism, the significant difference was also present (P<0.05). The western-blot and patch-clamp experiments showed that the mechanism on the combined method was the same as that of the single ELFF exposure and treated by 40nm MNPs could be induced more cells into early apoptosis than those by the 80nm powders combined with ELFF.
Dynamic Mechanical Properties of a Novel Structural Radar Absorbing Materials
Authors: Zhao Jun Liang , Li Li Xin , Yang Zhong Juan
Published: August 2013

A novel structural radar absorbing materials (SRAM), which give the new absorbing microwaves function to the normal resin-base composites, were prepared. The dynamic compressive tests of SRAM were carried out along both in-plane and normal plane directions of composites by means of the Split Hopkinson Pressure Bar (SHPB). In compressive test along in-plane direction, failure happened at the interface between fiber and matrix. Fracture mode and mechanism was proposed to explain these results. The adding of magnetic absorbing particles resulted in the deterioration of the compressive properties. But there was no obvious decrease on compressive strength of SRAM with the radar absorbing properties.
Study on Attenuation Performance of Expanded Graphite at 8 mm Wave under Different Experiment Conditions
Authors: Pang Min Hui , Wang Xuan Yu , Dong Wen Jie , Bai Hai Ta
Published: August 2013

On the base of analyzing the attenuation mechanism of expanded graphite, the influence of expanding volume of expanded graphite prepared by inserting nitric acid and attenuation performance of expanded graphite at 8mm wave in different expanding temperature is studied. Attenuation performance of expanded graphite prepared in the lab and by smoke equipment is compared in the same surface density. The results show that the temperature is over 500°C when the worm-like graphite can weaken 8mm wave effectively. At 1100°C, it will be up to the maximum, 4.9dBm. It is proved that attenuation performance at 8mm wave of the expanded graphite prepared in the lab is the same as that by smoke equipment.
Improved Antireflection Property of Subwavelength Structures Based on Finite Difference Time Domain Method
Authors: Chen Chi Feng , Cheng Yu Cheng , Ting Chia Jen
Published: August 2013

A kind of subwavelength structure array is numerically investigated to improved antireflection property. Based on finite difference time domain method, we consider adding a small conical structure in the gap between the pure periodic conical subwavelength structure to analylz the antireflection property in spectral range of 400-1100 nm. The improved antireflection property of subwavelength structures have distinguishing characteristic in particular places. The result shows the morphological effect on reflectance of new conical shape subwavelength structures.
Industrial Design and Engineering Analysis of Multi-Function Bicycle on Children Factors
Authors: Wu Xiao Li , Wang Yu Xing , Yao Yue Yang
Published: August 2013

Through researching and studying the entertainment, functionality, safety of the Children bike design, this paper shows that many problems should to be solved met in function using, to combine the children bike in entrainment and bike, which brings or combines swing machine and childs bicycle together. The project has designed the handle size, the seat height and the bike length in adjustability on Ergonomics. Moreover, the children bike is redesigned from the modeling, the structure and the producing process etc. At last, the paper introduces the engineering output and rapid prototyping process of the project, and it will promote the designing and producing of the children bike in the future.
Product Integrated Design Knowledge Modeling for Multidisciplinary Design Optimization System
Authors: Liu Hai Qiang , Lv Ming
Published: August 2013

A framework structure of product integrated design knowledge model for supporting multidisciplinary design optimization was proposed, the fusion method of product integrated design knowledge was explored, knowledge expression of product design was introduced, design knowledge acquisition of multidisciplinary design along with evaluating satisfaction degree in process and method of objection were analyzed. Associated with the methodology of multidisciplinary design optimization, a prototype system supporting multidisciplinary design optimization was developed based on ideal framework of product integrated design knowledge model with the suitable software development tool .
Research for Scale Effect Based on Similarity Theory
Authors: Wang Ai Lun , Zhu Chong
Published: August 2013

Scale effect widely exists, but there is no researcher considers similarity of objects under scale effect. In this paper, the similarity theory has been used to judge the similarity of objects and analyze the differences of the objects under different scales. Finally, find out and analyze the physical quantities that caused the scale effect.
Recovery Techniques for Complex Grain Boundaries
Authors: Sun Chao Ming
Published: August 2013

When estimating the grain size, the processing effect for complex grain boundaries is often poor. To solve this problem, the recovery techniques for complex grain boundary are studied. After analysis of steps to estimate the grain size, we know that it is critical to get more accurate boundary before quantitative determination, and the discontinuous points among grain boundaries should be connected. Therefore, two methods to connect the discontinuous points were established, and it showed that watershed method is more efficient; however over-segmentation and under-segmentation exist. Accordingly, recovery techniques of complex grain boundary were put forward, that is to edit the regional minimum manually or to connect the discontinuous points in the gray image before watershed transform. By this technique, the grain boundary can be got more accurately, conveniently and continuously closed, independently of interfere of noise, scratches, illumination etc.
Growth Retardation of Fatigue Crack by Cold Expanded with Ring Indented Method for AISI 304 Stainless Steel
Authors: Shiah Guan Chyun , Huang Guo Zhang , Tseng Cheng Yung
Published: August 2013

Drilled, cold expanded with ring indented method was employed for crack-tip on the both sides and front side of the specimens, thus build up the residual compressive stresses, strain hardening and plasticity induced closure, and lead toward crack growth retardation. The compact tension specimens of AISI 304 stainless steel were used drilled, cold expanded with ring indented in the fatigue test. The experimental methods were drilled (Φ=2mm ) and cold expanded (Φ=2.074mm) and both sides at 2mm and 1mm position of the crack-tip in the specimen, then apply 0kN, 6KN, and 9kN test loads, respectively. The experimental results showed that, for the same test position, the number of delay cycles result from cold expanded than that of drilled and the number of delay cycles are 220798. For the same position, the stronger test load is, the greater crack growth retardation effect is. And, This study proposed some useful information on utilizing cold expanded with ring indented method for AISI 304 Stainless Steel crack growth retardation.
Study on the Dent Resistance of Warm Forming HSS Parts with Free-Form Surface
Authors: Guo Yu Qin , Zhao Meng , Li Fu Zhu , Chen Wei , Chen Long
Published: August 2013

Recently, due to the harsh demands for automobile lightweight and safety, more and more attention is focused on the warm forming process of various high strength steel sheet. In the present work, aiming to the formed parts safety problems caused by elevating temperature, take B340/590DP steel as the research object, the dent resistance of the warm-forming parts with free-form surface is studied. Firstly, combing the warm tensile tests under various conditions with the secondary room temperature tensile tests, a secondary yield constitutive model is established for the researched material by the regression analysis method, which reveals the influences of temperature, strain rate and pre-deformation on the secondary yield behaviors. Secondly, based on the plastic deformation theory and the free-form curves and surfaces theory, a dent resistance evaluation system is proposed for the warm-forming high-strength steel parts with free-form surface. Finally, design a dent resistance model experiment, validate the dent resistance of the warm-forming B340/590DP steel specimens, and determine the relevant coefficient value in the proposed dent resistance evaluation system by means of the obtained experiment data. The research results can be used directly to select the reasonable warm-forming process conditions, control and improve the warm-forming parts quality and performances.
Effect of Twist Coefficient and Thermal Treatment Temperature on the Properties of PET Yarn
Authors: Lin Jia Horng , Lu Po Ching , Hu Jin Jia , Chen Yueh Sheng , Lou Ching Wen
Published: August 2013

Twisting has an influence on not only the strength, luster, softness, and elasticity of the yarns, but also the properties of the resulting fabrics. This study aims to evaluate how the rotor twister speed and the thermal treatment temperature influence the properties of the polyethylene terephthalate (PET) plied yarns and wrap yarns. Both yarn types are made with a twist coefficient of 1, 1.5, or 2, and then thermally treated in an oven at 70, 110, and 150 °C. The resulting plied yarns are wrap yarns are tested for tensile strength and elongation, and their surface is also observed by a stereomicroscope to determine the influences of the two parameters. The results of the experiment show that twist coefficient does not influence the tensile strength nor the elongation. The tensile strength of various plied yarns and wrap yarns is approximately 4.4cN/dtex; the variation in the twist coefficients is too small and thus hardly causes any significant differences in the yarns properties.
Comparative Sound Absorption and Thermal Insulation Properties of Compound Fabrics
Authors: Lin Jia Horng , Li Ting Ting , Lin Jan Yi , Lin Mei Chen , Lou Ching Wen
Published: August 2013

The compound fabrics comprised of double layers of nonwovens and carbon fabrics were prepared by needle-punching and thermal bonding techniques. The thermal bonding and number of layers effect on thermal insulating and sound absorbing property have been discussed. The resulting compound fabrics have thermal conductivity decreases to 0.02 W/(m*K) for single layer of thermo-bonded compound fabrics and sound-absorbing coefficient reaches to 0.848 at 4000 Hz for 3-layer un-thermo-bonded fabrics .
The Development of Small Size Double Side Metal Plate with Internal Structure Utilizing Metal Injection Molding Process
Authors: Shin Kwang Ho , Heo Young Moo , Kim Jong Deok
Published: August 2013

In this study, it is focused to make a double side metal plate with internal structure. The stainless steel powder (17-4PH 15F) was used in PIM process. PE(HDPE and LDPE) and PP were used to make the sacrificed insert with honeycomb structure using plastic injection molding process. And then these sacrificed insert parts were inserted at metal injection mold and metal injection molding process was carried out to build green part with rectangular shape. Subsequently, de-binding and sintering process were adopted. The dimensional contraction was occurred about 15.5% in width direction and about 16.2% in thickness direction.
Manufacturing Technique and Property Evaluation of Resilient Nonwoven Fabrics
Authors: Lou Ching Wen , Huang Shih Yu , Lin Ching Hui , Yang Yi Chang , Lin Jia Horng
Published: August 2013

This study creates the high resilience nonwoven fabrics by using modified polyester fiber. In order to have resilience, the nonwoven fabrics are thermally bonded with various temperatures and the air permeability and mechanical properties of the nonwoven fabrics are then evaluated. The optimum tensile strength of 481 N and resiliency of 26 cm occur when the nonwoven fabrics are thermally bonded at 180 °C, and the optimum tear strength of 276 N occurs when the nonwoven fabrics are thermally bonded at 160 °C.
Research of Design Evaluation Method Based on the Jack Human Model
Authors: Li Ying , Chen Deng Kai , Yu Sui Huai , Li Zheng
Published: August 2013

This paper focused on the area of simulation of man-machine applications, using JACK ergonomic software, and have a detailed analysis of sight of domain, and comfort of human-computer design factors to achieve a auxiliary design. The paper combines the emergency communications vehicles emergency communication vehicle cabin man-machine design examples to verify the effectiveness of the proposed method.
Microstructure and Electrochemical Properties of La0.7Mg0.3(Ni1-xCox)3.5(x=0.0-0.2) Type Hydrogen Storage Alloy
Authors: Zhao Xiao Yun
Published: August 2013

La0.7Mg0.3(Ni1-xCox)3.5 (x=0.0-0.2) type hydrogen storage alloy was prepared. In order to optimizing the content of Co it was studied effects that Co replaced Ni on the structure and electrochemical properties of La0.7Mg0.3(Ni1-xCox)3.5(x=0.0-0.2) type hydrogen storage alloy X-ray diffraction (XRD) analyses showed that the alloys were composed of the LaNi5 phase with the CaCu5-type structure and the (La,Mg)2Ni7 phase with the Ce2Ni7-type structure. The maximum electrochemical discharge capacity increases with the increase of Co content. Moreover, the cycle stabilities of La0.7Mg0.3(Ni1-xCox)3.5 was improved remarkably by small quantity replacement Ni by Co, after 250 times, the discharge capacity was increased from 30% (x=0.0) to 65% (x=0.20).
Parametric Human Body Model for Digital Apparel Design
Authors: Wang Shu Xia , Qin Sheng Feng , Guan Cong Ying , Yu Sui Huai
Published: August 2013

With the advance in 3D body scanning technology, it opens opportunities for virtual try-on and automatic made-to-measure in apparel products domain. This paper proposed a novel feature-based parametric method of human body shape from the cloud points of 3D body scanner [T2. Firstly, we improved the skeleton construction through adding and adjusting the position of joints. Secondly, automatic extraction approach of semantic feature cross-sections is developed based on the hierarchy. According to the unique distribution of cloud points of each cross-section of each body part, the extraction method of key points on the cross-section is described. Thirdly, we presented an interpolation approach of key points which fit cardinal spline to cross-section for each body part, in which tension parameter is used to represent the simple deformation of body shape. Finally, a connection approach of body part is proposed by sharing a boundary curve. The proposed method has been tested with our virtual human model (VHM) system which is robust and easier to use. The process generally requires about five minutes for generating a full body model that represents the body shape captured by 3D body scanner. The model can be imported in a CAD environment for application to a wide variety of ergonomic analyses.
The Design and Optimization of Nonwoven Composite Boards on Sound Absorption Performance
Authors: Huang Chen Hung , Chuang Yu Chun
Published: August 2013

This study aims to investigate the optimal value of design parameters for the sound-absorbing nonwoven composite board. The number of laminated layers and thickness of polyester fiber are viewed as the design parameters for fabricating the nonwoven composite board. The 2D, 7D and 12D polyester fibers are individually mixed with 4D low-melting point polyester fiber to produce 2D polyester nonwoven fabric (2D-PETF), 7D polyester nonwoven fabric (7D-PETF) and 12D polyester nonwoven fabric (12D-PETF) respectively. The developed nonwoven fabrics are then used to fabricate 2D-PET, 7D-PET and 12D-PET nonwoven composite boards through the multiple needle-punching and thermal bonding techniques. The sound absorption performance of each PET composite board is carefully examined. The experimental results reveal that the 7D-PET composite board with 10 laminated layers has the optimal sound absorption performance.
Effects of Warp-Knit Structure on the Properties of the Elastic Bamboo Charcoal/Stainless Steel Warp-Knitted Fabrics
Authors: Lin Jia Horng , Huang Yu Tien , Lin Ching Hui , Lin Chin Mei , Lou Ching Wen
Published: August 2013

In recent years, the improvement of scientific techniques has significantly promoted the quality of peoples lives as well as concepts of health care. This study manufactures bamboo charcoal (BC)/stainless steel (SS) covered yarns, which are then made into four types of elastic BC/SS warp-knitted fabrics. The far infrared emissivity, anion amount, and air permeability of the resulting fabrics are then evaluated to determine the influence of the warp-knit structure and amount of layers. The experimental results show that the far infrared emissivity of BC/SS warp-knitted fabrics decreases when the lamination layer number increases. Single-layer BC/SS warp-knitted fabrics all have a far infrared emissivity beyond 0.8.
Research on Market-Oriented Souvenirs Development Strategy
Authors: Ding Lan , Jiang Chao , Zhao Xiao Tong , Chen Li Ling
Published: August 2013

Travel souvenir industry is driven by the rapid development of the tourism industry. In the product development process, researching and developing (R&D) strategy needs to be studied in order to obtain the corresponding policy of market positioning, research and development cycle and the development number. According to the survey data, scientific and rational calculations are carried out to maximize the ratio of benefits and costs, the allocation of resources are improve effectively, and market demands and customer needs can be satisfied in a better way.
Research on the Selection Method of Tourism Cultural Souvenir Products Types Based on Multiply Drive Factors
Authors: Gao Jun Jie , Jiang Chao , Chen Li Ling , Ding Lan
Published: August 2013

Based on the status of modern cultural tourism souvenir market survey and research, the consumption preferences in the market of cultural tourism souvenirs are studied, the driving factors of production and cost and pricing constraint are analyzed, the production information database and the type of product configuration database are established in order to realize rational allocation of product type. By the scientific thinking method, the selection theory and application system over development of culture tourist souvenirs are improved and perfected. And it is of a certain degree of reference and guidance to develop cultural tourism souvenirs.
Research on Injection Products Molding Defects Warping Based on Moldflow
Authors: Yu Bei , Wang He Qing
Published: August 2013

The molding quality of plastic injection products are affected by such factors as mold structure and molding technology in the forming process. If the products have any quality problem, every forming process will have to be reviewed, which will intangibly lead to an increase in workload for mold-related staff and in the costs of production. Based on an example of molding defects warping in the practical production of a PBT plastic injection product, this essay analyzes the molding defects by using Moldflow software, with the aim of optimizing molding scheme and the molding quality of injection products and finally improving the social and economic benefits.
Truss Structural Optimization Based on NLPQL and MIGA
Authors: Zhang Yan , Xie Ji Long
Published: August 2013

Based on the minimum mass as optimal objective function, it sets up an FE model of the truss structure. The Multi-Island Genetic Algorithm (MIGA) and NLPQL are adopted as the optimization policy. Experimented with a truss walking platform as an example the validity of the methods was proved. The results showed that the NLPQL can get better optimal solutions of structure and reduce the mass effectively. It has important theoretical value and practical engineering significance.
Modified Harmony Search Algorithm for 0-1 Knapsack Problems
Authors: Xia Hong Gang , Wang Qing Liang
Published: August 2013

In this paper, a modified harmony search (MHS) algorithm was presented for solving 0-1 knapsack problems. MHS employs position update strategy for generating new solution vectors that enhances accuracy and convergence rate of harmony search (HS) algorithm. Besides, the harmony memory consideration rate (HMCR) is dynamically adapted to the changing of objective function value in the current harmony memory, and the key parameters PAR and BW dynamically adjusted with the number of generation. Based on the experiment of solving ten classic 0-1 knapsack problems, the MHS has demonstrated stronger convergence and stability than original harmony search (HS) algorithm and its two improved algorithms (IHS and NGHS).
Study on the Improvement of Genetic Algorithm by Using Vehicle Routing Problem
Authors: Guo Mei Ni
Published: August 2013

mprove the existing genetic algorithm, make the vehicle path planning problem solving can be higher quality and faster solution. The mathematic model for study of VRP with genetic algorithms was established. An improved genetic algorithm was proposed, which consist of a new method of initial population and partheno genetic algorithm revolution operation.Exploited Computer Aided Platform and Validated VRP by simulation software. Compared this improved genetic algorithm with the existing genetic algorithm and approximation algorithms through an example, convergence rate Much faster and the Optimal results from 117.0km Reduced to 107.8km,proved that this article improved genetic algorithm can be faster to reach an optimal solution. The results showed that the improved GA can keep the variety of cross and accelerate the search speed.
Analysis of Injection Molding Machine's Energy Consumption Based on Two Different Hydraulic Circuits
Authors: Xi Guan Nan , Sun Miao , Gao Jun , Zhou Yi Dan
Published: August 2013

As is known to all, domestic productions of injection molding machine are huge and exported to all over the world. However, the production can only occupy the low-end markets because of its high-energy consumption and low molding precision. Besides the problems of mechanical components, the main reason led to such results lie in the its too backward hydraulic system. By comparing domestic traditional hydraulic system with foreign new hydraulic servo system, this paper focuses on the analysis of the characteristics of foreign new hydraulic servo system and verify the results by experiments based on the upper two different hydraulic system. Through this paper hopefully can it provide some practical directs to the design of domestic new hydraulic system.
The Study on Airborne Equipments Life Prediction Based on the Finite Element Simulation under Comprehensive Stress
Authors: Ma Tian , Li Chuan Ri , Rong Shuang Long
Published: August 2013

To predict an airborne equipment lifetime with finite element simulation method, use ANSYS and Flothem, respectively, to analysis vibration stress and temperature stress, corrected by kinetic experiment; then import the results into the failure prediction software-CALCE PWA, set the intensity and duration of stress according to its mission profile, finally get the component failure life prediction results under comprehensive temperature and vibration stress; extract the Monte-Carlo simulation data, use the single point of failure distribution fitting, fault clustering and multipoint distribution fusion method to get the board and the whole machines lifetime and reliability prediction. The design refinement suggestion of the airborne equipment is given at the end of the conclusion.
Dynamic Simulation and Experimental Research of High Pressure Pneumatic Valve in Gas-Driven Light Gas Gun
Authors: Liu Yang , Song Xiao Dong , Yao Xiao Xian , Li Kun
Published: August 2013

Use gas-driven light gas gun is one of the techniques extensively used to achieve hypervelocity projectiles. The device was made up of a compressed gas gun as the first-stage drive. A new type high pressure pneumatic injecting system of gas-driven light gas gun for hypervelocity launching is introduced. As a critical component of the injecting system, the high pressure pneumatic valve was designed. Functions of the pneumatic valve were preserved and relevant techniques were discussed. Besides, a high pressure pneumatic mass flow control test-bed using inert medium was built in order to study the dynamic response characteristic of high pressure pneumatic valve in gas-driven light gas gun. To ascertain the response delay time of the valve, several turn-on and turn-off experimental tests of the valve were initiated. The results suggest that: the pressure of pneumatic electromagnetic valve gas supply circuit seriously influenced the properties of high pressure pneumatic valve; the mean delay time of the high pressure pneumatic valve was 190ms approximately at 6.5MPa gas pressure of the pneumatic electromagnetic valve gas supply circuit.
Simulation of the Self-Adhesive Label Printing Pressure Based on Non-Linear Contact
Authors: Yin Jiao
Published: August 2013

Based on the finite element non-linear contact theory, the calculation model of the self-adhesive label printing pressure is achieved, then doing the non-linear contact of this model by using ANSYS. By changing the magnitude of interference between the printing cylinder and the printing platform, printing pressure is achieved in different magnitudes of interference. Contrast to the traditional empirical method, this method make up for the lack of calculating the printing pressure. It turns out help correcting mechanism parameters to achieve the optimal design.
Application of Chaos Theory in the Garment Industry and Design
Authors: Jiao Hui Qin , Chen Sui Yang , Sun Xiao Fei , Wang Wu Fan
Published: August 2013

In this paper, we use chaos theory to explain the phenomenon in the field of fashion design. First we do a comparative analysis between nonlinear and garment industry trends of chaos theory, and then discuss the effect of Butterfly Effect to the product positioning of clothing brand, study the relationship of the fractal theory between the integrity and locality of the garment industry brand design. Finally, make examples of the wide range of applications of chaos theory in the field of artistic form design. This paper introduces chaos theory into the field of garment industry and design, which will bring far-reaching influence to the development of the garment industry and the future design.
Finite Element Analysis for a Certain Type of Vehicle Engine Shock Absorber Assembly Performance Based on ANSYS Workbench
Authors: Chen Yuan , Sun Jian Jun , Zhu Ya Qiao
Published: August 2013

The engine is the power source of the vehicle, it is the main and the most directly reason which causey the vehicle vibration. If you cannot control and attenuation of the vibration generated by it will make other parts of the body associated with strong vibration and noise, and also seriously affect vehicle handling stability and ride comfort, the occupant generated feel discomfort , even when serious damage to the body parts, shorten the car's life. Therefore, the role of the engine mounting system for attenuation and control of vehicle vibration is very important, the shock absorber is an important part of the engine mounting system; engine shock absorbers assembly performance will directly determine them can or cannot work to achieve the desired damping effect. In this paper, the authors propose a new, reliable assembly process; the assembly of the damper can achieve the production process requirements.
Design of the Oscillating Follower Cam Profile Based on NX8.0
Authors: Zhang En Guang
Published: August 2013

Based on the principle of reversal method, the Motion Simulation module of NX8.0 is adopted to find the trajectory of the oscillating follower roller center relative to the cam with the IF function driving the oscillating follower .At the same time, the contour line of oscillating follower disk cam is also designed using the quintic polynomial spline curve and the motion simulation is verified. The cam design by the reversal method and the theoretical one are compared and analyzed.