bluuebunny/crossref_metadata_2025 huggingface dataset:
Finite Element Analysis of Bullet Penetration Circular Sandwich Plate
Authors: Zhao Pei Long , Song Fang Zhen , Chen Nai Jian , Song Bo
Published: August 2013

A nonlinear dynamic finite element method based on ANSYS/LS-DYNA is used to simulate the physical process of a bullet penetrating circular sandwich plate at a speed of about 400 m/s. In the simulation, Lagrange algorithm, Johnson-Cook and Crushable-foam constitutive model are choosed. Energy time history curve, impact force time history curve, Von-Mises stress nephogram and displacement nephogram are obtained. At the same time, stress time history curve of the maximum stress element and displacement time history curve of the maximum displacement node are obtained. Compared with the non-sandwich plate, it is found that the use of sandwich plate can reduce the total mass, inner plate stress and displacement, and can protect inner plate well.
Test and Analysis of Machine Center's Principal Spindle Dynamic Errors
Authors: Liu Kuo , Liu Chun Shi , Tan Zhi , Zhou Shuai
Published: August 2013

The form of principal spindle's dynamic errors is analysed firstly. Principal spindle's radial average errors and asynchronous errors, axial average errors and asynchronous errors, minimum radial separation center of some vertical machine center are all tested with SPN-300 of API. Three vertical machine centers are tested and every machine center is tested three times at different rotating speed. The test results and the influences of all errors are analysed at last.
Researches of the Differential Fiber Bragg Grating Seepage Pressure Sensor
Authors: He Bi , Li De Li , Li Chuan , Li Ying Na , Zhou Ya Ping
Published: August 2013

Seepage pressure is the pressure of pore fluid inside soil, which directly influences the stability state of engineering structure. A differential fiber Bragg grating seepage pressure sensor is developed, in which two fiber Bragg gratings are respectively pasted on the top and bottom surfaces of the uniform intensity cantilever. Acted as the seepage pressure measurement cavity, the free end of metal bellows is connected to the cantilever girder free end. Under the pressure of pore fluid function, the engender axial displacement of metal bellows is converted to the deflection change of cantilever girder free end, which generates the wavelength shifts of two pasted fiber Bragg gratings. The experiment results of pressure loading and unloading show that the sensitivity of the sensor is 1.96 nm/ MPa, the repeatability error is 2.27% FS, and the nonlinear error is 1.7% FS.
The Research of Equal Probability Newton Iterative Method to Mechanism Synthesis & Approximate Synthesis
Authors: Che Xiao Yi , Luo You Xin , Li Ling Fang
Published: August 2013

Many questions in natural science and engineering are transformed into nonlinear equations to be found, Newton iterative method is an important technique to one dimensional and multidimensional variables and iterative process exhibits sensitive dependence on initial guess point. For the first time, utilizing an equal probability random number to produce initial value, a new method to find all solutions based on utilizing equal probability random number to obtain locate initial points to find all solutions of the nonlinear equations was proposed. The numerical examples in linkage synthesis and approximate synthesis show that the method is correct and effective.
In Situ Measurement of Elastic Modulus of Individual Layers for Composite Thin Films by MEMS Test Structures
Authors: Sun Chao , Zhou Zai Fa , Li Wei Hua , Huang Qing An
Published: August 2013

In this paper, a direct and simple method to characterize the elastic modulus of individual layers for composite films byin situmeasuring of MEMS test structures is presented. The structure is composed of a set of microactuators which contains a rigid plate with two supporting composite beams. A model is developed to describe analytically the relationship between the force and the deflection of microactuators by electrostatic measurements, and the elastic modulus of multi-layered beams with different widths are evaluated. FEM simulations are implemented to validate the accuracy of the relationship between the on-load voltage and the capacitance between the microactuator and the electrode on the substrate. Test structures are fabricated using CMOS-MEMS process and experiments are to be carried out soon.
Research on Gap Adjustment for Offset Printing Machine Based on ARM
Authors: Gao Zhen Qing , Sun Han Xu
Published: August 2013

Many problems exist in traditional gap adjusting for offset printing machine, so an automatic regulating technology is proposed. In the course of this research, the hardware system of the gap adjusting is designed by the embedded ARM controller as the core of the automatic control system, the developing process of the ARM control program is illustrated. The method for automatically adjusting the gap can simplify the operation, improve performance of the offset press, improve the stability and reliability of the offset printing process, and has a certain practical value, and has obtained the ideal effect.
GPC Control on Exhaust Gas in Regenerative Furnace Based on Feedforward of Hearth Temperature and Air Flow
Authors: Sun Xue Gang , Zhou Zheng Gan
Published: August 2013

Exhaust temperature is an important indicator in regenerative furnace with characteristics of nonlinearity, time-varying and large inertia. Also, it is affected by the hearth temperature and flow rate of combustion air, which makes it hard to be well controlled by traditional methods, such as PID and etc. In this paper, a strategy of generalized predictive control (GPC) integrated with feedforward of hearth temperature and air flow is presented to optimize the exhaust temperature control. Practices show that the control index is more stable and errors are obviously narrowed.
Research on the Integrated Control System of a Small Marine Condenser
Authors: Zhang Yong Sheng , Peng Xue Chuang , Ma Rui , Fang Wei Ming
Published: August 2013

In order to effectively control the main parameters of the condenser, the lumped parameter mathematic model of a small marine condenser is presented according to its structure and working principle. The integrated control system of the condenser is designed. Matlab/Simulink software is used for the simulation of the control system. Different operating conditions of the condenser are calculated. Result shows that the integrated control system of the condenser could effectively keep such controlled parameters as vacuum, condensate subcooling degree and water level at the set value. It has guiding significance for control system design of the marine condenser.
Design of Biped Walking Robot Based on the Arduino
Authors: Liu Jie , Wu Tao
Published: August 2013

This paper probes a six-degree of freedom bipedal robot driving by servos and introduces the walking principle, structure composition and control system of the biped robot. Arduino is used to control the entire course of the movement. Based on the motion analysis of the biped walking robot, programming with the servo function, which is the Arduino software platform own specialized library functions to control the servo motor, control the rotation angle of the servos precisely. Ultimately complete the gait of the robot successfully.
Kinematics Simulation of 3-RPS Parallel Mechanisms Based on Virtual Reality
Authors: Tang Yi , Liu Jie , Li Li Hua , Liang Xiao Dong
Published: August 2013

In order that every part of the mechanism is not destroyed in real application, motion of 3-RPS parallel mechanisms is analyzed, the kinematics inverse solution of 3-RPS parallel mechanismselongation of branch poles is solved. The paper is based on the inverse solution, simulate the motion of 3-RPS parallel mechanisms, and get the normal kinematics solution of 3-RPS parallel mechanismsthe pose of top-flat. Compare the pose curves of mechanisms top-flat which are initialized and solved by simulation to validate the correctness of solving methods of 3-RPS parallel mechanisms. At the same time, provide a way of kinematics simulation of complex parallel mechanisms.
A Wideband 9 GHz LC-VCO with Tail Current Source Array in 0.18-μm RF CMOS Process
Authors: Ma Peng , Fan Xiang Ning
Published: August 2013

A wideband 9 GHz LC-VCO with tail current source array based on TSMC 0.18-μm RF CMOS process is presented in this paper. After discussing the start-up conditions, the structure of tail current source array is utilized to lower the power consumption in high frequency bands and guarantee start-up at low frequency bands. Furthermore, to extend the frequency range, a 4-bit switched capacitor array is used. Based on our analysis, a NMOS cross-coupled VCO with 4-bit PMOS tail current source array is implemented. Post-simulation results show that the tuning range is from 6.372GHz to 9.154GHz and the phase noise at 1MHz offset is less than-110dBc/Hz in the entire tuning range. The operating current of the VCO core is from 8.24mA to 13.362mA in the entire tuning range under 1.8V supply voltage. And the area of the proposed VCO is 1177.775μm × 577.54μm, with two buffer stages and pads.
The Simulation and Application in Eliminating Noise of Adaptive Filter
Authors: Xiong Fei Qiao , Ao Bang Qian
Published: August 2013

In practical application, signal and noise statistical characteristics are often unknown or not informed, fixed filter is difficult to process these signals and the filtering effect is poor. To address the issue, this paper design the adaptive filter which is based on the algorithm LMS and RLS. By simulation in the MATLAB environment, we can compare the analytical results of the two algorithms and observe the effect of noise elimination, the adaptive filter can be a good noise suppression.
Design and Preparation Method of Fiber Optoacoustic Effect Device Used for Artificial Optical Cochlea
Authors: Li Chen , Wang Jing Xuan , Tian Lan
Published: August 2013

Laser can stimulate sound wave, its possible for fiber laser to evoke neural activity safely and produce the auditory perception, this acts as the electrode role in cochlear implant. Moreover, the laser is characterized by definite direction and optical signal between adjacent fibers dont readily interfere. Therefore, optical fiber cochlear implant based on optoacoustic effect is promising. The design and preparation of an experimental system based on optoacoustic effect is introduced in this paper. The selection of laser source and the control methods of optical signal were discussed, and testing results of the fiber optoacoustic effect, including the time domain waveforms and spectrograms of the evoked optoacoustic sound were given. Also, a preliminary discussion for the extended fiber array system applied in artificial fiber cochlea as an alternative to electrodes stimulation was progressed.
Progress of Theoretical Research-Oriented Multi-Species Small Batch Machining Process
Authors: Yue Ming Yue , Zhou Yi Dan
Published: August 2013

With the rapid development of machinery manufacturing industry, multi variety and small batch production has gradually become one of the main means of manufacturing enterprises. On the basis of describing the characteristics and meaning of multi variety and small batch production, this article summarizes its domestic and international situation of machinery process theory, optimization and evaluation methods, presents several methods of mathematical description and model for multi variety and small batch production and finally summarize the trends of matching problem between the processing technology and production system.
Simulation of Induction Quenching on the Work Area of Reading Arm in Electronic Dobby Shedding Device
Authors: Li Zhi Long , Chen Rong Fa , Lu Hua Feng , Wu Long , Yang Hua , Li Qing Qing , Pan Yi , Liu Tao
Published: August 2013

Reading arm is a key component of the high-speed looms, thin-walled parts, 3mm thick, easy to be deformation during heat treatment.The hardness HRC60 of workeded area is required and uniform distribution.Temperature field of induction hardening process and distribution of residual stress field were simulated by ANSYS software.The decarburization of induction hardening region was also simulated by Deform software. Heat treatment process was optimized by the simulated results.
Upsetting Process Analysis and Numerical Simulation of Metal Pipe’s End
Authors: Su Yong Lei , Yang Wu Zi , Wang Chang Ping
Published: August 2013

Upsetting is a common method in the production of connectors, a new technology to avoid instability of long pipe under compression was taken in this paper, which would get the upsetting shape of long pipe by changing the length of deformation zone. Forming process was simulated by finite element, and some mechanisms of metal deformation and load were obtained. The simulation results showed that: instability was not occurred and one could have specified shape by using conical die upsetting only once. Then the upsetting experiment was conducted, the trail had a good match with simulation results, which expanded upsetting rules, and provided a reference for design of die.
Prediction of EVA Plastic's Expansion Ratio Based on BP Neural Network
Authors: Zhu Lai Fa , Liu Bin , Xu Jian Wen
Published: August 2013

Combined with Taguchi method of experimental design and BP neural network technology, select process parameters including molding temperature, molding time and injection pressure, Taguchi experiments are respectively arranged for different diameters of sphere and cylinder, different side lengths of tri-prism and quadrangular prism, different thicknesses of thin sheet without hole and with hole etc. molds, then these experiment results are used as neural network sample data, and expansion ratio of EVA plastic can be predicted more accurately after neural network is trained.
Influence of Sizing and Cooling Process on Properties of N80-1 Seamless Casing Using Steel 40Mn2V and the Process Parameter Control
Authors: Wu Le Sheng , Fang Jian , Li Ming Xin , Yuan Ze Xi
Published: August 2013

nfluence of process parameters such as deformation strain and temperature in sizing, and pipe cooling rate on strength, impact toughness and microstructure in steel 40Mn2V was investigated, by hot simulation test, tensile test, impact test and microstructure observation test. The quantitative relationship between strength values and process parameters was analyzed using software Matlab, and the formulas with higher accuracy were established. It is indicated that strength, impact toughness and microstructure are mainly influenced by sizing deformation temperature and pipe cooling rate. Bainite transformation, the main cause of bad impact toughness occurs when pipe cooling rate reaches or exceeds a critical value. To satisfy the property requirements of N80-1 casing when steel 40Mn2V is used, a suitable sizing temperature shall be controlled in the range of 695~870°C when pipe cooling rate is at or below 0.6°C/s, and in the range of 695~820°C when pipe cooling rate is above 0.6°C/s but not exceed 1.1°C/s.
LJ707-Crnimo Flux Cored Wire of Basic Slag System Be Applied to Non-Preheating Welding Technology of HSLA
Authors: Hurile Tao Gao , Chen Fu Rong , Hao Yong Fei , Zhang Ai Ai
Published: August 2013

This article investigates the welded joints of HSLA Q550 without preheating and post-heating treatment process. Tensile test, bending test, low temperature impact test, and the impact fractures and joint microstructure observation and analysis are used.The test result shows that the welded joins achieves equal strength with base metal. The average values of the welded joints impact absorbed energy at-20 °C are greater than 40J and at-40 °C its average values are greater than 27J, thus the low-temperature impact energy joint can meet the service requirements of hydraulic support. It shows that choosing proper welding material, developing reasonable welding and post-heating treatment process can cancel the preheating process of Q550 steel welding.
The Effect of Modification of Hydroxyapatite Whisker with Zinc Acetate via Sol-Gel Technology
Authors: Jin Jian Feng , Liu Wen Ying , Zhang Wen Yun , Chen Qing Hua , Yuan Yan Bo , Yang Li Dou , Xiao Yu Hong , Li Ming Qiu
Published: August 2013

Antibacterial activity of zinc oxide (ZnO) or strengthening of hydroxylapatite whisker (HAPw) had been studied and applied widely. However, antibacterial property of ZnO-HAPw was scarcely researched nowadays. The aim of this study was to further investigate several kinds of morphologies of ZnO-HAPw prepared by sol-gel technology at different pondus hydrogenii (pH) value and temperature. Four kinds of morphologies of ZnO-HAPw were granule, triangle, short rod and gongs nail at 70°C and pH=6.4, 37°C and pH=6.6, 70°C and pH=6.6, 70°C and pH=6.6. The SEM images of HAPw and ZnO-HAPw samples showed that the HAPw surface was smooth and no difference after annealing treatment. In addition, different shapes of nanoZnO fused uniformly on the HAPw surface. The EDS indicates nanoZnO fuses on HAPw surface.
Pressure Adaptive Feeding System Based on Piston Extrusion
Authors: Liu Ying , Yu Yong Ze , Liu Yuan Yuan , Hu Qing Xi
Published: August 2013

Additive manufacturing (AM) with high flexibility are widely used in tissue engineering to produce customized designs with good controllability of scaffold materials and structures. Paper develops a pressure adaptive feeding system based on piston extrusion to form hydrogel scaffolds and discusses the extrusion process. The experiments show that, pressure adaptive feeding system based on piston extrusion can precisely form scaffolds for tissue engineering, and the flux has been well controlled, the over-accumulation on deposition path at the end has been eliminated, which lead to effective guarantee of scaffold forming quality.
Preparation of Sulfonated Cyclohexanone-Formaldehyde Resin
Authors: Guo Hong Xia , Liu Qiang , Wang Zi Ming , Cui Su Ping
Published: August 2013

Sulfonated cyclohexanone-formaldehyde resin (SCF) was synthesized using cyclohexanone and formaldehyde as raw materials, sodium sulfite as sulfonating agent. The composition of the SCF resin was characterized by FTIR and 13C NMR, and the possible mechanism for formation of the resin was suggested. The effects of reaction parameters, such as ratio of formaldehyde and cyclohexanone, the amount of sulfonating agent, as well as reaction temperature and pH, on the viscosity and average molecular weight were investigated. The results showed that the optimum reaction conditions was that the ratio of reactant was n (formaldehyde):n (cyclohexanone):n (sodium sulfite) = 2.0:1.0:0.7, and pH value of the system was 10 at 90°C temperature. The average molecular weight of the resulted resin was 58392.
Study of Surface Characteristics of T700 Carbon Fibers and Interfacial Properties of their Reinforced Epoxy Composites
Authors: Li Ling Cong , Wang Li Li , Hao Hua , Ling Hui , Sun Hong Jie , Yu Yun Hua , Yang Xiao Ping
Published: August 2013

The purpose of this paper is to comparatively study the surface characteristics of domestic and Toray T700 carbon fibers (T700-CFs) and the interfacial properties of their reinforced epoxy composites. The surface roughness and surface energy of the fibers were characterized by scanning electron microscope (SEM) and dynamic contact angle analysis (DCAA). The surface chemistry analysis of the fibers was carried out by using X-ray photoelectron spectroscopy (XPS). The interfacial properties of the T700-CF/epoxy composites were studied by testing the interlaminar shear strength (ILSS), observing SEM images of composites profiles and calculating the interfacial adhesion factors from dynamic mechanical thermal analysis (DMTA) data. The results show that domestic T700-CFs have a better interfacial adhesion to epoxy matrix due to its higher surface roughness, chemical activity and surface energy than Toray T700-CFs.
Modification of PP by Using Recycled Materials
Authors: Xie An , Jin Huan Lin , Zhang Ming
Published: August 2013

As a kind of general-purpose plastic, PP possesses a good mechanical property and excellent resistance to chemical attack. So, now, it is widely used. In this article, a kind of decorating materials used in automobile and rubber powders were used to undertake a modification of PP. Besides, mechanical property was tested and SEM,TMA,TG technology were used to investigate some of the property of composites. We drew a conclusion that the composite with a ternary system consists of PP,POE and rubber powder got the best integrated performance.
Research on the Process of (Ti,Cr)N by Multi-Arc Ion Plating and Microstructure of Composite Films
Authors: Zhang Yan , Gao Yuan , Wu Wei Qin , Yuan Lin , Wang Cheng Lei , Ma Zhi Kang , Cai Hang Wei
Published: August 2013

In this study, the (Ti,Cr)N composite films were deposited on 4Cr13 martensitic stainless steel by multi-arc ion plating (MAIP), researched the composition, morphology and micro-hardness of (Ti,Cr)N composite films by the method of changing the current of Cr target and Ti target. The result show that: with the acr current increasing, the Cr content of (Ti,Cr)N composite films increased, the Ti content decreased, the number and size of droplets decreased, and the hardness of composite films increased first, then decreased. When the acr current was 70A, the hardness reached the maximum. At the same time, the phases of composite films changed when the Cr content increased. When the value of X was 0.28, the phase of composite was TiN and when the value of X was 0.37 or 0.65, the composite films appeared the phase of CrN and Cr2N.
BST Nano-Powder for Infrared Detector Prepared by Sol-Gel Method
Authors: Fan Mao Yan , Zhang Li Fang
Published: August 2013

As a typical composite with perovskite structure, (Ba1-xSrx)TiO3(briefly named BST) shows many merits, This paper provides a new sol-gel method to prepare BST gel, and carry out a research and analysis on the thermal evolution of gel. The BST nanopowder is prepared by the heat treatment through the traditional sintering method and microwave sintering technique, respectively. The synthesis temperature of perovskite phase by sol-gel method decreases from 1380°C to 900°C, comparing with that by traditional solid-state reaction method. The XRD and SEM results show that microwave sintering technique can control effectively the grain growth size of BST ceramic, and the powder has the uniform chemical components and grain size of around 60nm. Furthermore, the grain size is reduced, the dielectric constant increased dramatically and the dispersivity reduced.
Research on Attenuation Law of Expandable Graphite to Millimeter Wave in the Three-Dimensional Space
Authors: Bai Hai Tao , Wang Xuan Yu , Dong Wen Jie , Pang Min Hui
Published: August 2013

In this paper, researchers test the attenuation law of millimeter wave to expandable graphite of different concentrations with 3mm (8mm) artificial fog insertion loss test system, through laboratory tests and smoke device field tests. The results of tests proved that the attenuation performance of expandable graphite to 3mm wave is better than to 8mm wave, which could reach 18dBm and 16dBm respectively when the density is 60g/m3 and the optical path is 0.2m. Besides, the indoor attenuation performance of expandable graphite is better than outdoor performance, which means that meteorological conditions have great impact on the attenuation performance of expandable graphite in the field tests, and that the sedimentation of expandable graphite is quite speedy under wind-free circumstances. Therefore, it is suggested to extend the suspension time of expandable graphite as long as possible, so as to improve the anti-interference ability of expandable graphite smoke.
Effect of Surface Modification on Slip Casting of SiC Slurry
Authors: Zheng Cai Hua , Ji Xiao Li
Published: August 2013

In this study,the Zeta potential of original and modified SiC micropowder was researched,and the effects of surface modification on SiC slurry solid loading,rheologyh and density of slip casting body were studied.The structure of body was looked through SEM. The results indicated that the dispersion of modified SiC micropowder was greatly improved,the slip casting SiC slurry which had 73vol% solid loading,low viscosity and good fluidity was prepared,after slip casting,the density of body was 2.698[g·cm-3],and the structure was uniform.
Membrane System Processes of Edible Gelatin Film
Authors: Xue Fei , Jiang Yun Sheng , Han Yu Chen , Wang Chun Jing
Published: August 2013

Using food grade gelatin as a substrate in combination with edible film-forming agent, it can be made ;the edible film which thickness is about 0.16mm is homogeneous, transparent, and have a certain strength . Experiments explore the preferred film-forming process of the gelatin film, through the comprehensive consideration of several aspects from hygroscopicity, transparency, mechanical properties, determination of the best film-forming solution pH of about 7, with temperature of 55 ° C ,drying out for around 9h.After 10h post treatment of drying,the best integrity of membrane can be obtained.
Studies on Classification Performance Assessment of a Dry Classifier Based on Analytical Hierarchy Process
Authors: Yu Yuan , Liu Jia Xiang
Published: August 2013

The classification performance of a dry classifier depends on cut size, classification accuracy, classification efficiency, classifier process capability, and yield of fine powders, which should meet the required particle-size distribution. Consequently, the classification performance indices limit each other and only a comprehensive assessment of these classification performance indices can evaluate the classification performance truly and synthetically. In the present paper, the Analytic Hierarchy Process is used to calculate the weights of the classification performance indices after determining the hierarchical model. The dimensionless transformation eliminates the effect of the different dimensions. Then, the comprehensive assessed value of the classification performance for each experiment is obtained using the linear weighted method. The maximum value corresponds to the best classification performance among these assessed values. In the present study, a turbo air classifier was used as the classification system and talc powders were used as materials. The best classification performance indices were a cut size of 21 μm, a classification precision index of 0.6, a Newton classification efficiency of 61%, and a yield of fine powders of 57%. The corresponding optimal operational parameter combination consists of a feeding speed of 1.1 kg/min, a wind speed of 8 m/s, and the rotary speed of its rotor cage is 1200 rpm. This assessment method avoids the limitation of evaluating a single classification performance index and the incomplete information derived from single factor experiments. Furthermore, the method also provides quantitative evaluation criteria for the classification performance of a dry classifier. In the proposed method, the classification performance indices can be selected and the comparison matrix can be set flexibly according to production requirements.
A Model of Human Cone Based on Physiological Distribution
Authors: Duan Fei Long , Wang Zhi Jie
Published: August 2013

A good computer retinal model is the key to realize retinal prosthesis. In some of the previous studies, the modeling of cone cell was not considered in retinal models; in other studies, although the model of cone cell was included in the retinal models, its distribution features was hardly taken into consideration at all. In this paper we present an improved cone cell model and realize the model based on cameras. First, based on the physiological data that cone cell is high in the fovea and falls quickly with eccentricity increased, distribution function model of the retina is successfully built in a realistic way. Second, considering non-homogeneity distribution feature of the cone cells, we build a corresponding function between the pixel and the cone cell for simulating retina with a camera. Third, the cone cell model based on its distribution features is constructed. In the end, simulation is carried out for the model, and it is verified that the model is useful for the design of retinal prosthesis.
The Precision Horizontal Machining Center Integrated Dynamic Accuracy Modeling Based on Multi-Body System Theory
Authors: Cai Li Gang , Xiao Chuan Ming , Cheng Qiang , Liu Zhi Feng , Gu Pei Hua
Published: August 2013

According to multi-body theory, establish the precision horizontal machining centers characteristic matrix and geometric accuracy model, and then establish the relation model between thermal error and collected temperature according to the five line measurement method and multiple linear regression method, which will be studied next. After the superposition of geometric accuracy model and thermal error model, getting precision horizontal machining center integrated dynamic accuracy model.
Morphology of Poly(vinyl alcohol)/Graphene Nanosheets Composite Nanofibers
Authors: Huang Chien Lin , Peng Sheng Yin , Wang Yu Jyun , Chen Wen Cheng , Lin Jia Horng
Published: August 2013

The morphology of poly (vinyl alcohol) (PVA)/graphene nanosheet (GNS) electrospun fibers was studied. GNSs were prepared from chemically reduced graphene oxide using freeze drying. The effect of adding GNSs on solution viscosity and conductivity were investigated. The PVA nanofibers with GNSs have smaller diameters than those without GNSs.
Numerical Simulations of Micromechanical Properties of Al Alloy/SiC Hollow Sphere Syntactic Foams Composites
Authors: Lu Zheng Jie , Wei Han Long , Liao Shu De , Lu Sen Kai
Published: August 2013

The micromechanical properties of a Al alloy/SiC hollow sphere syntactic foams composite material have been studied using the Solidwork simulation code applied the finite element method (FEM). The simulated results have shown that the values of quasi-static compressive strength, plateau stress, and densification strain are 175 MPa, 120 MPa and 0.50, respectively. The general trend of dynamic stress–strain graphs is similar to quasi-static compression graphs. The compressive properties of the composite are not strain rate sensitive. The simulated peak strength value is ≈140 MPa. Al matrix and SiC hollow sphere exhibit different mechanical behaviour. The ultimate stress is found near the interface of composites. The failure initiates by the fracture of weak particles, some of the cracks can propagate to the matrix as well. Shear band formation in the matrix and shearing of SiChs lead to the major failure activity.
Comparison of the Simulation and Experimental Mechanical Properties of B4C-ZrB2/Al Interpenetrating Phase Composites (IPC)
Authors: Wei Yong Sen , Huang Ping , Yang Ri Fei , Lu Sen Kai
Published: August 2013

Interpenetrating phase composites (IPCs) are becoming an important class of materials as the result of the development of a number of new techniques for producing composites with interpenetrating microstructures. In this paper, the mechanical properties of a B4C-ZrB2/Al IPCs have been studied using the Solidwork simulation code applied the finite element method (FEM). The results have shown that the B4C-ZrB2ceramic matrix and Al network exhibit different mechanical behaviour. The ultimate stress is found near the interface of the composites. Simulated data shows ultimate tensile strengths of up to 453 MPa at a failure strain of up to 0.5%. The compression strength was up to 615 MPa with 0.41% compressive strain to failure. The composites show an excellent resistance to high cycle fatigue. Fatigue life for specimen was 5.1×104cycles for 210 MPa while R =-1.0, and 5.6×104cycles for 133 MPa while R=-0.05. Infiltrated Al addition was the leading reason for the fracture toughness improvement of the composites. The simulated results are consistent with the experimental results well.
Property Evaluation of PET Fiber and Metal Fiber Composite Woven Fabric
Authors: Chang Yuan Jen , Shiu Bing Chiuan , Lin Jia Horng , Lou Ching Wen
Published: August 2013

This study aims to fabricate strong mechanical properties and electrical conduction woven fabric, which provides flexible and strength for application. Polyethylene Terephthalate fiber (PET fiber) having fine mechanical properties are widely used in industry, as well as metal fiber are often used on electromagnetic shielding and static electricity protection. This study took both advantages of PET fiber and metal fiber for water sensitive functional textile. The result showed that warp yarns has a tensile strength of 1363.3N/mm and weft yarns has a tensile strength of 1483.3N/mm. In addition, both textiles with 20 wt% water absorption can be electrical conduction. Various metal yarns have different electrical resistivity and conductivity with various water absorption percentage.
Topology Optimization of Thermo-Mechanical Structure Using the Hybrid Celluar Automata Method
Authors: Zhan Jin Qing
Published: August 2013

Topology optimization of thermo-elastic structures using the hybrid cellular automata method is investigated in this paper. The objective is to minimize the mean compliance of a structure with a single material volume constraint. The hybrid cellular automata method is used to solve the optimization problem. The local change in the design variable is determined by a local rule based on the proportional control law. The numerical example is presented to show the feasibility of the present approach.
NGV. Using to be Alternative Energy in Metal Melting
Authors: Prasertsook S. , Saranan P. , Udomsree N. , Sukachart N.
Published: August 2013

This research used 20 kilograms crucible furnace to be experiment furnace. The furnace used NGV. to be fuel for aluminum melting while melting process melting time, melting temperature, pouring time and fuel consumption were recorded. The fuel consumption comparison between NGV. With LPG are one kilogram of aluminum used 0.35 kilogram of NGV or 3.92 Thai bath/kilogram (NGV .price 11 bath/kilogram) and one kilogram of aluminum used 0.25 kilogram of LPG or 4.53 Thai bath/kilograms (LPG.price 17.93Thai baht/kilogram)
Algorithm Design of Four-Step Three-Dimensional Braided Composite Structures in Matlab Environment
Authors: Deng Chao , Jiang Jian Jun , Fang Liang Chao
Published: August 2013

For solving the problem of the geometric simulation of 3D braided composites, taking four-step rectangular 3D braided fabrics as an example, and based on the analysis of yarn moving regulation, the mathematical models between the braiding technique parameters and the geometric structures is established. By taking UG as the 3D display platform and MATLAB as the control core, 3D geometric simulation of the pre-modeling entity is realized. Such a simulation enables the users to observe the braid spatial structure and braiding moving process intuitively and modify them dynamically on the Internet. With this method, the design quality and efficiency of products will be raised remarkably.
Manufacturing Technique and Property Evaluation of RFPET/TPET Hybrid Nonwoven Fabric
Authors: Lin Jia Horng , Hsing Ya Lan , Hsing Wen Hao , Chen Jin Mao , Lou Ching Wen
Published: August 2013

Heat energy plays a significant role in resources and industries, which makes the development of energy-saving and thermal retention materials important to environment protection. This study combines three-dimensional hollow Polyethylene Terephthalate (TPET) fibers, recycled far-infrared polyethylene terephthalate (RFPET) fibers, and low melting temperature polyethylene terephthalate (LPET) fibers at various ratios to make the RFPET/TPET hybrid nonwoven fabric. The tensile strength, tearing strength, air permeability, and far infrared emissivity of the fabrics are evaluated. With a blending ratio of 8:0:2, the hybrid nonwoven fabrics have the optimum tensile strength of 145 N, tear strength of 184 N, and air permeability of 205 cm3/cm2/s.
Manufacturing Technique and Antimicrobial Activity of Silver Nanoparticles
Authors: Chen An Pang , Lou Ching Wen , Chung Ya Yuan , Lin Mei Chen , Lin Jia Horng
Published: August 2013

Recently, the biomaterial is in rapid development stage, which could be widely applying in medical application, due to its biodegradability, nontoxic and biocompatibility. Chitosan is naturally abundant polymers have the biodegradability, nontoxic and biocompatibility. In this research, the chitosan and silver nitrate were used to develop the antibacterial agent via nanotechnique. In the reaction system, the reaction time and stirring speed were discussed, which will affect the surface plasmon resonance. The particle sizes were measured using transmission electron microscopy (TEM) and UV visible spectrophotometry. The silver nanoparticles size was below 100 nm via TEM. In addition, the results of antimicrobial activity indicated that the antibacterial agent has well antimicrobial activity on staphylococcus aureus. Due to the silver nanoparticle provides relatively higher surface area to contact with bacteria affect DNA molecules by losing their replication abilities.
Manufacturing Technique and Properties Evaluation of Ni-Coated Copper Composite Fabrics
Authors: Chen An Pang , Hwang Po Wen , Lin Ching Wen , Lin Ting An , Chuang Ya Yuan , Lin Jia Horng
Published: August 2013

The existence of the electromagnetic radiation may lead to diseases, which also includes cancer and cause the repellence of electrical compatibility. The textiles which have electromagnetic shielding effectiveness become more important in modern life. In the research, the PET/ Ni-coated Copper composite yarn were made by the wrapping machine, which the core yarn is Ni-coated Copper wire and the wrapped yarn is PET filament. After that, the composite yarn is fabricated by the automatic sampling loom into woven fabrics and had the tests of mechanical properties and electromagnetic shielding effectiveness. The test results revealed that the EMSE of the PET/Ni-Cu complex woven fabrics is 32.28dB, which the test frequency is 900 MHz, laminated layer number is 3 and the laminated angles are 0°/45°/90°, respectively.
Effects of Lubricant Viscosity-Temperature Relationship on the Capacity of Sliding Bearing
Authors: Dong Xiao Fei , Lin Bin , Zhang Guan Wei
Published: August 2013

Depending on the experimental data of Water-based lubricant viscosity-temperature relationship, this paper adopts Fluent software to analyze how lubricant viscosity-temperature relationship affects load-carrying properties of hybrid sliding bearings. The results show that lubricants will rise obviously when hybrid sliding bearings are in high speed, which will greatly affect bearing capacity and stiffness of bearings. The maximum stiffness of hybrid sliding bearings appears when the eccentricity is from 0.4 to 0.5. This conclusion is dramatically different from bearing capacity number ignored lubricant viscosity-temperature relationship.
An Analytical Method of Analyzing the Heat Conduction for the Unequal Cross-Section Straight Fin
Authors: Zhang Fan , Song Peng Yun
Published: August 2013

The cross-section area of straight fin is often considered to be equal in the thermal analyses of straight fin, but sometimes it is unequalin actual situation. Taking a straight fin with two unequal cross-sectional areas as an example,an analytical method of heat conduction for unequal section straight fin is presented. The analytical expressions of temperature field and heat dissipating capacity about the fin,which has a smaller cross-section area near the fin base and a larger one, is obtained respectively. The calculation results of the unequal cross-section are fully consistent with the equal area one, so the method is proved right. The results show that the larger the cross section areanear the base,the better is the heat transfer, and the temperature at the base with larger cross-section area is lower than that with smaller cross-section area when the amount of heat is fixed.
Interpretations to the Esthetics of Exposed Symbol in Product Design
Authors: Yang Zhuo Lin , Bian Fang
Published: August 2013

A designer tends to think of first most is how to give the product a beautiful coat when he faces the product design. He always attempts to hide the parts which is ugly, cluttered, easy to rust from the gorgeous products' shell. However, in today's modern society, exposed design way is more accepted and used, from costumes to buildings, even product today. The popularity of exposed symbol not only shows the sexy female beauty, but also is endued with more significations. How to represent beauty by exposure. How to expose brilliantly and wittily. Where to be exposed to show particular style and resonate with beauty. Actually, exposed design is also a philosophy. So, study how to use the exposed design way to present product design beauty, as well as to build the community and their own personal values. Thus it may be a reliable guide to the product design in the future.
Computer-Integrated Manufacturing for Chinese Herbal Medicine Drinks Products
Authors: Ho Zih Ping , Lee Ing Chuang , Chen Jing Jung
Published: August 2013

Chinese herbal medicine has a long history, based on the Statistical Yearbook of the World Health Organization; half of people on earth have ever taken herbal remedies as an alternative health treatment. Except China, there are 123 countries that have established Chinese herbal medicine research related institutions. People didnt like taking medicine directly due to taste, therefore, Chinese herbal medicine drinks (CHMD) are moving toward a rising trend of quantity, partly replacing Western style medicine. This research tries to integrate CHMD products with customer preferences in Taiwan, aiming at customer CHMD preference analyzing and modeling. Each different CHMD has its own attribute and efficacy trend. Two distribution data sets of customer behavior were introduced to design computer integrated manufacturing parameters within a dynamic selection model software. Results also found that immunity adjust and anti-fatigue were the main reasons when customers purchased these CHMD. The reason may be from the tension life style caused.
The Research of the Rehabilitative Exercises System of Residual Limbs Based on EMG Sensor
Authors: Wang Qiang , Lan Zhi , Zhang Xiu Feng , Ma Yan
Published: August 2013

According to the characteristic of amputees of lower limbs, the scheme of research project apply the mode of seat-form training for amputees of below knee, and carry on exercise function recover training. Establish kinematics model and analyses electromyographic signal (EMG) of quadriceps when volunteers do rehabilitative exercises, and study pattern recognition and classification for the rehabilitative exercises system of lower residual limbs. Use threshold control, and make use of power spectrum coefficient of EMG acquire character value, establish the relation of the EMG character value and lower limbs in rehabilitative exercises, definite a method which can recognize rehabilitative exercises.
The Development of the ACIS-Based Deformation Modeling System and its Application
Authors: Cao Jiang Lin , Chen Si Yuan , Yang Xue Rong , Ma Deng Fu , Luo Shao Ming
Published: August 2013

ACIS is a graphics system development platform constructed with C++. It includes a series of C++ functions and classes. In this paper, ACIS and the ACIS-based deformation modeling technology are first introduced, and then an ACIS-based Deformation Modeling System is developed, which includes modeling, reading and writing, deforming functions and so on. The experimental analysis on the application of the deformation modeling system to reverse engineering is proposed, and it verifies its effectiveness in reverse design.
Opposition-Based Improved Harmony Search Algorithm Solve Unconstrained Optimization Problems
Authors: Xia Hong Gang , Wang Qing Zhou , Gao Li Qun
Published: August 2013

This paper develops an opposition-based improved harmony search algorithm (OIHS) for solving global continuous optimization problems. The proposed method is different from the classical harmony search (HS) in three aspects. Firstly, the candidate harmony is randomly chosen from the harmony memory or opposition harmony memory was generated by opposition-based learning, which enlarged the algorithm search space. Secondly, two key control parameters, pitch adjustment rate (PAR) and bandwidth distance (bw), are adjusted dynamically with respect to the evolution of the search process. Numerical results demonstrate that the proposed algorithm performs much better than the existing HS variants in terms of the solution quality and the stability.
Opposition-Based Modified Differential Evolution Algorithm for Power System Economic Load Dispatch
Authors: Xia Hong Gang , Ding Wei Xiang
Published: August 2013

Opposition-based modified differential evolution algorithm (OMDE) is proposed for solving power System economic load dispatch in this paper. This algorithm integrates the opposition-based learning operation with the crossover operation to enhance the convergence of the algorithm and to prevent the algorithm from being trapped into the local optimum effectively. Besides, we employed a new strategy to dynamic adjust mutation rate (MR) and crossover rate (CR), which is aimed at further improving algorithm performance. Based on 6 units and 13 units power system experiment simulations, the OMDE has demonstrated stronger convergence and stability than original differential (DE) algorithm and other improved algorithms that reported in recent literature.
Computational Modelling of Liquid Sloshing in Rectangular Tank
Authors: Gradinscak Marija , Jafar Farial
Published: August 2013

Liquid sloshing inside a partially filled rectangular tank has been investigated. The fluid is assumed to be water and the tank is forced to move along x axis to simulate the actual tank excitation. The volume of fluid technique is used to track the free surface and the model solves Navier_Stokes equations by the use of the finite difference estimation. At each time step, a donar-acceptor method is used to transport the volume of fluid function and locations of the free surface. In this paper the location and transport of the free surface in the tank have been investigated using a CFD code (FLUENT) for 3D configuration. The use of a numerical tool has resulted in a detailed investigation of these characteristics, which have not been available in the literature previously.
On Starting Population Selection for GSAT
Authors: Gorbenko Anna , Popov Vladimir
Published: August 2013

GSAT is a well-known satisfiability search algorithm for conjunctive normal forms. GSAT uses some random functions. One of such functions is a function of starting population of truth assignments for the variables of conjunctive normal form. In this paper, we consider a method of artificial physics optimization for computing a function of starting population.
Dynamic Simulation and Analysis of Resistance Ring Correction Mechanism
Authors: Qin Jie , Zhang Ming Yu
Published: August 2013

A correction mechanism prototype is set up on the basis of ADAMS platform. Under the condition that the projectile is in the set flight state, the changing law and affecting factors of general kinetic motion characteristics of the correction mechanism virtual prototype are surveyed through motion analysis of resistance.