bluuebunny/crossref_metadata_2025 huggingface dataset:
Large Deformations of Low Density Open-Cell Elastomeric Foams: Kelvin Model Study
Authors: Zhang Qing Ping , Fan Zhi Geng
Published: October 2011

Based on Kelvin model, the large deformations of elastomeric foams were simulated by finite element method (FEM). Numerical results indicated that edge bending, edge stretching and edge torsion were important deformation mechanisms of low density open-cell Kelvin foam. The hyperelasticity of the cell material had little effect on the macro-mechanical properties of the foam at low strain in [111] direction and finite compressive strain in [100] direction when edge bending was the main deformation mechanism of the foams. With the increase of the uniaxial tensile strain, edge stretching played notable roles, which resulted in that the hyperelasticity of the solid had significantly influence on the deformation of the foam at large uniaxial tensile strain. And the high strain compressive stress-strain curves in the [111] direction based on the hyperelastic relation differed from the linear elastic results remarkably as edge torsion was an important deformation mechanism of the foam.
Experimental Study on Impact Compression and Spliting of Granite
Authors: Wang Wan Peng , Hu Yong Le , Ren Xing Tao , Xiong Yi Bo , Ying Liang
Published: October 2011

In order to systematically study on dynamic mechanics character of granite, impact compression experiments and impact flattened Brazilian disc specimens of granite have been investigated with modified split Hopkinson pressure bar (SHPB) experimental facility, curve about stress versus strain and other parameter at strain rates of 23.9/s～108.4/s were obtained from impact compression. The dynamic tensile strength and critical tensile failure strain at strain rates of 2.3/s～25.6/s were obtained from impact flattened Brazilian. The experimental result show that dynamic compression strength , elastic modulus and failure strain，dynamic tensile strength significantly increase comparing to quasi-static experiment, and the above mechanics parameter include dynamic strength etc will increase with strain rate increasing, granite have the character of impact harding and ductility enhancement. The failure degree of failure will increase with increasing strain rate under impact compression; the failure configurations of the specimens present an center splitting mode under impact flattened Brazilian experiments. Whether impact compression or impact splitting under strain rate including this paper ’s experiments, the relationship between the DIFC or DIFT and the logarithm of strain rate is linear.
Two Dimensional Acoustic Manipulation in Microfluidic Channels
Authors: Xu Lin , Neild Adrian
Published: October 2011

Acoustic radiation forces can be used to collect particles within microfluidic systems. The standard way of doing this is to excite a one-dimensional standing wave between a pair of solid walls; the particles will then typically collect at the pressure nodes. Higher degrees of positioning control can be achieved by excitation of additional orthogonal one-dimensional standing waves; this usually requires further walled constraints (two-dimensional collection for example requiring a chamber rather than a channel). In this work we examine methods of exciting two-dimensional fields in a channel using a single transducer as well as the use of pressure fields which are not one-dimensional in nature and the advantages they can offer.
Numerical Simulation of Two High Speed Trains Passing by each other in a Long Tunnel
Authors: Zhang Ming Lu , Yang Yi Ren , Lu Li , Fan Chen Guang
Published: October 2011

Large eddy simulation (LES) was made to solve the flow around two simplified CRH2 high speed trains passing by each other at the same speed in a long tunnel base on the finite volume method and dynamic layering mesh method and three dimensional incompressible Navier-Stokes equations. Wind tunnel experimental method of resting train with relative flowing air and dynamic mesh method of moving train were compared. The results of numerical simulation show that the flow field structure around train is completely different between wind tunnel experiment and factual running. Two opposite moving couple of point source and point sink constitute the whole flow field structure during the high speed trains passing by each other. All of streamlines originate from point source (nose) and finish with the closer point sink (tail). The flow field structure around train is similar with different vehicle speed in a long tunnel, and they have a little difference with on the ground.
Safety Assessment of Bridge Structures under the Random Dense Vehicle Loads
Authors: Hu Bo Xue , Zhang Jian Ren , Yin Xin Feng , Peng Hui
Published: October 2011

Based on the investigation of vehicle loads, the model of the random dense vehicle load was simulated, and three different degree dense vehicle loads were obtained with the simulated model. The calculated results show that the random dense vehicle loads moving on the bridge structures is very dangerous for the security of the structures; the combination factor 1.4 designed in the code is not precise for the situation of random dense vehicle loads, and it is suitable for the common vehicle loads.
Biomechanical Comparison of Different Pedicle Screw Fixations for Thoracolumbar Burst Fractures Using Finite Element Method
Authors: Wang Dong Mei , Shi Du Fang , Li Xi Lei , Dong Jian , Wang Chun Hui , Chen Shan Guang
Published: October 2011

This study was designed to compare the biomechanical effects of three posterior fixations for thoracolumbar burst fractures using the finite element (FE) method. Five T11-L1 FE models, including the intact, the fractured at T12, the monosegment fixated at the level of the fracture, the short-segment fixated with four pedicle screws and the short-segment fixated with five pedicle screws, were created. And four loading conditions (flexion, extension, lateral bending and torsion) were imposed on these models and deformations in these models under different loading conditions were calculated by finite element method. The biomechanical effects of the three different pedicle screw fixations for thoracolumbar burst fractures were compared and analyzed. The results showed that the displacement level in monosegment fixation model was close to that in the intact one. The extension motion was more limited in short-segment fixation models than that in monosegment fixation model. Under the lateral bending condition, the level of the displacements in these models were similar and the peak rotation angles in the three fixation models were close to that in the intact one. The displacements in fractured T12 were increased in monosegment fixation model under all loading conditions. These indicated that the monosegment fixation couldn’t provide desirable stability for the fractured T11-L1 and the short-segment fixation with five pedicle screws was the best selection because of ideal stability and movability.
Analysis of Discharge of Transmission Line in Sandstorm
Authors: Gao Qiang , Shi Yao Hu
Published: October 2011

A gas-solid flow model of transmission line surrounded by sand storm is built. Numerical simulation under different velocity, different sand diameter and different transmission line diameter situation is taken to obtain the volume fraction distribution of sand around the transmission line. Finite element-image method is chosen to build a sand-electricity coupling model made up of high voltage transmission line and sand around transmission line. Electric field distribution of transmission line with sand around it is obtained. Analysis results show that the model is effective.
Effect of the Stress Balance on Determination of Rock Dynamic Fracture Toughness Using Holed-Cracked Flattened Brazilian Disc
Authors: Zhang Sheng , Li Xin Wen
Published: October 2011

Based on the experimental and FEM analysis, it was discussed that the stress balance was not a necessary condition for determining rock dynamic fracture toughness accurately using holed-cracked flattened Brazilian disc. The dynamic stress distribution modes of disc sample with time change were analyzed from the early loading stage to continued loading process. It was proved that the fracture time may occur before the balance of stress was achieved. It was not necessary meet the condition of the stress balance using the experiment combined with numerical method. We could get dynamic fracture toughness, according to the dynamic stress intensity factor of the crack tip and fracture time.
Structural Analysis of Conical Bottom-Supported Offshore Wind Turbine Foundation
Authors: Zhao Yuan Lin , Zhu Zhi Wen , Deng Shi
Published: October 2011

In this paper, a kind of conical bottom-supported offshore wind turbine foundation was developed. The finite element model was built in SESAM and the structure was analyzed in operating condition and survival condition. The result shows that both the bearing platform and the conical bottom can satisfy the requirement of displacement and strength. The new kind of platform can be applied in shallow sea and offshore, easy to tow, and has low cost, which is helpful to offshore wind power exploitation.
One Dynamic Model of Human Elbow Joint in the Sagittal Plane
Authors: Hou Xin Ping , Wang Xi Shi
Published: October 2011

After a series of impactful predigestion,the paper established one elbow joint dynamic model in the sgittal plane when the humerus was not fixed. According to the results of the example, two conclusions were drawed: firstly, the joint reaction engendered when the humerus movable were far less than the situation of fixing;secondly, we suggested ,when upright position bend elbow strength training was making , desirable buckling shoulder angle position is at 100~200 .
Effect of Tensile Strain and Gold Thickness on the Micropattern Topography of Gold Thin Coatings Deposited on Polydimethylsiloxane
Authors: Chang Zue Chin , Lin C. B. , Yang Wen Hua , Ho Jin Shin
Published: October 2011

Abstract: The polydimethylsiloxane (PDMS) film was applied a tensile strain, next the following steps was should be done: fixing the tensile strain, sputtering the gold film on the surface of PDMS film, and then releasing the tensile strain, a large-scale area ripple structure was formed. The ripple dislocations, the cracks and the oriented surface cracks appeared simultaneously during the forming of the ripple structure. This study also discussed the wavelengths of ripple structures resulted from the amount of tensile strain (30%, 50%, 70%, 90% and 110%) and gold thickness (4Å and 10Å). The wavelengths of ripple structures decreased as the tensile strains increased and gold thickness decreased.
Quality Control of Casting Slab for 510L Steel
Authors: Pan Hong , Wu Guo Rong , Li Zhi Qiang
Published: October 2011

Slab quality affects the quality of hot rolled sheet significantly. There were serious transverse corner cracks on continuous casting slab of 510L steel plate in Panzhihua Steel before. Based on this, some effective countermeasures are put forward, such as the optimization of ratio of heat flux on narrow side and broad side of casting slab and mold powder, as well as the stabilization of casting speed and working condition of caster. With these countermeasures, transverse corner cracks on continuous casting slab have been significantly reduced, and the lines and peeling defects on hot rolled sheet reduce from 30% to 0.
Effect of Temper Temperature on Microstructures and Mechanical Properties of 8CrV Saw Blade for Metallurgy
Authors: Yuan Shao Qiang , Liang Guo Li
Published: October 2011

Using metallographic observation and mechanical measurement, metallurgical saw blade made of 8CrV steel was continuously tempered at 300 °C-460 °C.The experimental results demonstrated that: with the increasing tempered temperature, the quenched martensite will transform into the tempered martensite, tempered martensite+tempered sorbite and tempered sorbite; the strength of samples declined continuously but yield ratio increased a little. At about 420°C, the temper brittleness occurred and obvious properties change happened of the samples, such as impact value, reduction area and elongation percent. However, the hardness values enhanced at this temperature.
The Factors that Affect the Absorption of CO2 on the Lithium Zirconate Materials
Authors: Wang Yin Jie , Liu Ji Ping , Kan Mei Xiu , Lu Xiao Bing
Published: October 2011

Use the Monoclinic phase of nano-scale ZrO2 , Li2ZrO3 and MgO as raw materials, with high temperature solid state reaction, we synthesized the Lithium zirconate materials which can directly absorb CO2 at high temperatures of 450~550°C. Then use the scanning electron microscopy (SEM) and X-ray diffraction (XRD) for the morphology and structure analysis. The CO2 absorption properties were tested by thermal analyzer (TG). The experimental results showed that the amount of MgO addition affected the Lithium zirconate’s CO2 absorption properties, but to the pH and surface area, there is on influence.
The Effects of Nickel-Plating on Al2O3 Particles Reinforced Steel Matrix Composites
Authors: Zhang Guo Shang , Gao Yi Min , Xing Jian Dong , Wei Shi Zhong , Li Ji Wen , Xu Liu Jie
Published: October 2011

The wettability between ceramic particles and metal play an important role in fabrication of ceramic particles reinforced metal matrix composites(PRMMCs). In present paper, Al2O3 particles were coated with nickel by chemical plating to modify the preparation and properties of Al2O3 particles reinforced steel matrix composites. Using the Al2O3 particles treated by chemical nickel-plating, Al2O3 particles reinforced steel matrix composites were fabricated by powder metallurgy process(PM). And the wear resistance of the composites was investigated. The results show that: the nickel coating can fully and tightly cover on the surface of Al2O3 particles, and the nickel coating thickness is uniform about 2~3 micron; The nickel coating can effectively improve the uniform distribution of Al2O3 particles in the composites. And the treated Al2O3 particles can be tightly bonded with steel matrix,which improve the wear resistance of composites. The wear resistance of composites reinforced treated and untreated Al2O3 particles each is 2.5 and 1.6 times of Hadfield steel.
Evaluation of Antioxidative Activity between CoQ10-Nanostructured Lipid Carrier and CoQ10 Cosmetic
Authors: Wang Jian Min , Li Yan , Wang Hong Xia , Yao Yun Long , Zhou Hong Jing , Liu Guang Yu , Xia Qiang
Published: October 2011

Coenzyme Q10 (CoQ10) is a poorly water-soluble active ingredient with intrinsic chemical instability, but holds strongly antioxidative capacity. The CoQ10-NLC aqueous dispersion has been prepared, the antioxidative activity between CoQ10-NLC and CoQ10 cosmetic have been investigated, and several employed methods such as scavenging efficiency on DPPH radical and inhibition of superoxide anion and hydroxyl radical generation illustrated its potentially antioxidative activity. The test results displayed that CoQ10-NLC aqueous dispersion indicated higher antioxidative activity than commercially available CoQ10 cosmetic.
The Thermal Fatigue Performance for Cast Iron Brake Drum of Large Trucks
Authors: Lu Gao , Wang Wen Yan , Xie Jing Pei
Published: October 2011

This paper studies the application in different cast iron brake drum the thermal fatigue properties of materials. The results show that the stress concentration factor of grey cast iron, hot fatigue crack initiation, low intensity, and easy to expand, organization crack initiation poor stability, antioxidant ability is poor, thermal fatigue is poorer. 35% of vermicular cast iron and of ductile iron high strength, toughness, good stress concentration factor small, thermal fatigue is well.
The Research on Fabrication Technique of Al2O3 Short Fiber Preform
Authors: Yang Yong Shun , Feng Ke , Yin Tian Tian
Published: October 2011

The preform of Al2O3 fiber was obtained by wet method,and the result shows that the fiber distribution of preform is more uniform after the pretreatment, and the length - diameter ratio can fully meet the demand of qualified preform. The surface of preform prepared by this process is flat, and fiber is distributed evenly, with certain strength,so it can be used for pressure infiltration fabrication of alumina fiber reinforced metal matrix composites.
New Results of Buckling and Postbuckling Behaviors for Fiber-Reinforced Composite Shear Deformable Anisotropic Laminated Cylindrical Shell Subjected to Torsion
Authors: Li Zhi Min
Published: October 2011

New results of buckling and postbuckling analysis are presented for a shear deformable anisotropic laminated cylindrical shell of finite length subjected to torsion. The governing equations are based on a higher order shear deformation shell theory with von Kármán-Donnell-type of kinematic nonlinearity and including the extension/twist, extension/flexural and flexural/twist couplings. The nonlinear prebuckling deformations and initial geometric imperfections of the shell are both taken into account. A singular perturbation technique is employed to determine the buckling loads and postbuckling equilibrium paths. The numerical illustrations concern the postbuckling response of perfect and imperfect, moderately thick, anisotropic laminated cylindrical shells with different values of shell parameters and stacking sequence. The postbuckling equilibrium path is unstable for a moderately thick laminated cylindrical shell under torsion and the shell structure is virtually imperfection-sensitive.
Synthesis of Monodispersed Ag-Coated SiO2 Nanoparticles with one-Pot Method and Investigation of its Antibacterial Activity
Authors: Zhang Nian Chun , Yu Xiang , Ding En Yong
Published: October 2011

Monodispersed SiO2/Ag core-shell nanoparticles have been synthesized successfully via a facile and fast route. Morphology of the product was investigated by high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) technique. It has been revealed that the diameter of SiO2/Ag compostie was ca. 220 nm and the shell of Ag nanoparticle are homogeneous and monodispersed. The antibacterial activities of SiO2/Ag core-shell nanoparticles were tested by means of minimal inhibitory concentration (MIC) and viable cell counting method. The results showed that the SiO2/Ag presents a good antibacterial performance against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Candida albicans (C. albicans), which indicated its potential applications as antibacterial material for microbiocides.
The Impact of Grain Size on Oxidation Behavior of TP304H Austenitic Stainless Steel at High Temperature in Air
Authors: Wei Wei , Wang Zhi Wu , Liu Mao Lin
Published: October 2011

Exposed to 650°C air, TP304H stainless steel with two different grain size was oxidized at this temperature. At the meantime, comparison of their oxidation was through the oxidation kinetics curves and analysis of the morphology and composition of oxide scale which conducted by SEM and X-ray. The results showed that the oxidation rate of TP304H stainless steel was slowed down by grain refinement and oxide scale of fine-grained TP304H steel was thinner than that of coarse-grained steel. The nucleation and the growth of nuclei of coarse-grained oxide scale were more rapid. In addition, the grain refinement of austenitic stainless steel accelerated the diffusivity of Cr and made for the formation of dense and continuous oxide scale, so that the oxidation of stainless steel can be effectively inhabited.
Research on Efficiency and Stability of Computer Numerical Control Lathe
Authors: Long Hua , Luo Yong Xin , Shen Xiao Long , Zhao Bei Chen
Published: October 2011

In order to study the highly efficient and stable cutting of computer numerical control lathe (CNC lathe), this paper established a dynamics model of chatter turning system on tool side, and analyzed the influences of the chatter stable lobes about the CNC lathe system’s overlap coefficient, cutting rigidity coefficient in unit width, main vibration system’s damping ratio, and observed the chatter effects about the chatter stable lobes in different regions by experimental methods. Research shows that the choice of the cutting speed in the stable regions can significantly increase the cutting width, and improve the efficiency of cutting.
The Experimental Research on Friction and Wear of the New Type Rock Bit Floating Ring Journal Bearing
Authors: Xu Fang , Zhou Zhi Gang , Wang Guo Rong
Published: October 2011

A new type rock bit floating ring journal bearing is designed to solve the current problems of large heat, excessive wear and short life of rock bit journal bearing in high-speed and heavy-loads conditions, and the experimental research on friction moment, temperature rising and friction loss of bearings are carried out in different parameters and different working conditions. The experimental results show that the floating ring speed is changed because of the influence of loads and cone speed, the mean speed of floating ring remains relatively constant when the loads and the cone speed are constant and the speed of floating ring slows down as the speed increases, the inner and outer clearance of rock bit floating ring journal bearing have much effect on the speed of floating ring, the bearing life can significantly extend when the inner clearance is 0.058-0.064 and the outer clearance is 0.024-0.030, the rock bit floating ring journal bearing have more excellent tribological properties compared to the traditional thrust bearings and can replace the silver mangansese alloy slot currently used for the thrust bearings. The research provides important basis for further develop working performance research of rock bit floating ring journal bearing and design the new type rock bit floating ring journal bearing.
The Study on Recovery Vehicle Scheduling Problem of Industrial Waste Recycling
Authors: Zhang Xiao Nan , Fan Hou Ming , Li Jia Shu
Published: October 2011

In recent years, china are paying attention to the development of the circular economy and the ecological industrial parks, industry, as the industry of the largest emissions of industrial waste, the circular economy is more concern by people. The recovery transport process of industrial waste recycling is the important part of the industrial circular economy, reasonable scheduling solution is the effective means to improve the recovery and processing speed of industrial wastes and make the cost of recycling lower. In this paper, through analysis and research the recovery transport links of industrial waste recycling, points out that the vehicle scheduling problem of industrial waste recycling is the scheduling problem combined full load with not-full load, and for this problem, build vehicle scheduling optimization model, use ant colony optimization algorithm to solve it, and that achieved good results.
Optimal Design of Conjugate Cam-Linkage Combined Mechanism for Pressure Device in Die-Cutting
Authors: Shen Shao Hua , Shi Xiang Dong , Yuan Ying Cai
Published: October 2011

The conjugate cam is used to actuate the platform organization of the die-cutting machine based on raises the die cutting speed, the precision and the complete machine stable request. Which realize long exerting presses time n the high spot, and causes the platform to realize the parallel high and low translational motion. The objective function is established to satisfied the special position on the displacement requests, and the constraints is established to satisfied the structure size request, a circulation can only exert pressure in one operating cycle, and the self-locking request in last exert presses .The conjugate cam rocking bar slide organization optimization design is done, obtain the row spacing short and adds the retarded control to increase the tooth row of running time, could realize the platform smoothly.
A Study of High-Pressure Descaling Nozzle Jet Flow Characteristics by CFD Simulation
Authors: Qian Cheng , Chen Yong Li , Jiao He , Shen Chong , Yan Hui , Wu Ming Quan , Chen Li Qing
Published: October 2011

In this paper,through combination research methods of Gambit modeling and Fuent solving,we has received the curve of nozzle pressure vector, vector of velocity and velocity change curve,Which has provided the effective analysis method for eliminating descaling ineffective and the steel plate surface defect. Minimum field pressure Locate in the middle of the nozzle and hit place,Maximum field pressure Locate in close to the body surface part;220mm is the maximum target distance;According to the formula-type fluid calculate,it can concluded that simulatere result is credible.
Pattern Recognition of Chatter Gestation Based on Hybrid PCA-SVM
Authors: Shao Qiang , Feng Chang Jian
Published: October 2011

To distinguish chatter gestation, chatter recognition method based on hybrid PCA(Principal Compenent Analysis) and SVM(Support Vector Machine) is proposed for dynamic patterns of chatter gestation in cutting process. At first, FFT features are extracted from the vibration signal of cutting process, then FFT vectors are presorted and introduced to PCA-SVM for machine learning and classification. Finally the results of chatter gestation recognition and chatter prediction experiments are presented and show that the method proposed is effective.
Structure Analysis and Optimization for High-Speed Vertical Machining Tool Table
Authors: Zhang Fei , Gao Dong Qiang , Mao Zhi Yun , Yi Jiang Miao , Lin Huan
Published: October 2011

In order to meet high-speed machining center’s overall performance requirements, there are four different worktable structures established in SolidWorks, and they are carried out static analysis in ANSYS Workbench to calculate their static stiffness, so that find out the best structure. In meeting the worktable stiffness, the best structure is optimized in ANSYS Workbench, then the worktable’s quality reduces 8.43% in the original foundation and the cost also decreases, which is a basis for worktable’s dynamic performance analysis.
Experimental Study on the Shaft Laser Cladding Bending and the Establishment of the Empirical Formula
Authors: Zheng Hui , Wang Guo Dong , Han Zhi Ren
Published: October 2011

In order to study the influence of the layer of the laser cladding to the bending degree, obtain the mathematical formulation in shaft laser cladding bending and derive the empirical formula, the laser cladding test for shaft was designed. The laser cladding test had been proceeded at the same cladding area and different layer of cladding. The results of the experiment show that the shaft is bended facing the laser beam. The bending degree and the layer of laser cladding are at the direct proportion. At the same time mathematical formulation in shaft laser cladding bending has been established and the parameter which is used to measure the degree of the bending has been obtained. Empirical formula between bending degree and the layer of laser cladding has been established. The circular run-out formula along the shaft length has been derived. The calculated value and the measured value are of the goodness fit. The maximal error is 0.035mm, and the average error is 0.017mm. It illustrates that the mathematic formulation is correct and the empirical formula has high accuracy.
A Novel CNC Grinding Method about Relief Surface of Corner Radius End Mill Based on a CAM System
Authors: Zhao Cai Xia , Tang Fei , Li Shu Zhe , Wang Xiao Hao
Published: October 2011

Corner radius end mill, whose cutting capability is mostly affected by the relief surface, is a kind of highly effective end mill [1]. So a novel mathematical model of relief surface curve about corner radius end mill, which is verified with a five-axis computer numerical control (CNC) grinding machine and simulated based on a system CAM, is derived and presented in the paper. According to the proposed tool coordinates system and the mechanical coordinate of the machine, the relative motion between the cup wheel and the tool is determined. In order to obtain an accurate relief curve when machining, the model of a cup wheel edge is also introduced. The coordinates of grinding point when grinding relief surface are calculated. With the input data of the corner radius end geometry, wheels geometry, wheel setting and machine setting, the NC code is generated automatically from the program. Then the code is used to simulate in 3 Dimension before actual machining. Finally, the NC code will be used for machining in the CNC grinding machine. The roundness of the round corner in the final product is very well, means this model is effective.
Structural Principle and Performance of Three Cylinder Hydraulic Confined Piston Engine
Authors: Yang Dao Zhai , Zhang Hong Xin , Zhang Tie Zhu
Published: October 2011

Three cylinder HCPE integrates the advantages of HFPE and engine driving plunger pump system, whose structure is compact, energy transforming and transmitting route is short. The structural principle of three cylinder HCPE was described. The dynamical simulation model of HCPE was constructed. Through simulation, volumetric efficiency ranges between 27% and 97%, is slightly influenced by output pressure and more practical rotational speed should be 1 600～1 800 r/min; the universal characteristic of fuel consumption rate ranges between 228.23 g/(kW • h) and 984.11 g/(kW • h), output pressure between 1.01 MPa and 4.27 MPa, output flow between 3.80 m3/h and 16.91 m3/h, effective thermal efficiency between 12.06% and 37.67%, and effective power between 1.12 kW and 19.93 kW, which are evidently better than engine driving lunger system, but slightly worse than HFPE.
Mathematical Modeling and Experimental Verification of the Radial Stiffness for a Wire Race Ball Bearing
Authors: Shan Xiao Biao , Wang Li Li , Xie Tao , Chen Wei Shan
Published: October 2011

This paper firstly presented a mathematical model of the radial stiffness of a wire race ball bearing in a certain type of three-axis aircraft simulating rotary table. The Stribeck theory was used to determine the radial load distribution of the bearing. By treating the contact between balls and wires as equivalent compression springs, the relationships of these springs in series and parallel can be obtained to solve the total radial stiffness. Experiments verified the theoretical results of the radial stiffness. This work provides an effective support for further studying the complex contact dynamics of the wire race ball bearing in the future.
Analysis of Adaptability of Manipulator for Grasping Apple by Cable-Driven Pneumatic Pressure
Authors: Li Zeng Qiang , Zhang Jun , Liu Guang Yuan
Published: October 2011

To sort different sizes of apples, a kind of passive grab cable-driven of flexible manipulator is designed. Each finger consists two single degree-of-freedom joints and a torsional spring is installed on each joint. The two-point of finger is stretched by a cable, which is connected to pistonstem of cy- linder. However, when the cable looses,the torsional spring drive the finger bend and grab the apple. The objective function is determined by the minimum change range of grasping force, Which can be optimized by the fmincon-function provided by the software MATLAB. We can conclude that: twist the stiffness of hydropneumatic spring arek2 andk3 ,preloaded angle areΦ02 andΦ03, moreover it show that the manipulator has a good supple adaptation without causing damage to apple.
Digit Expression for Structure of Planar Gear Trains
Authors: Sun Jin Feng , Zhao Da Xing , Yin Ye Hong
Published: October 2011

In order to realize the analysis and design on planar gear trains with computer, the structure information of gear trains must be found out, which is easy to extract, store and operate by computer. According to the structure analysis of planar gear trains, the basic return loop matrix of gear trains etc are adopted to express digitally the structure of gear trains. The structure of gear trains will be automatically identified, which will provide information for computer aided analysis and design of planar gear trains.
Simulation of Micro-Bolometer Using Double Sacrificial Layers Structure
Authors: Jian Qi Xia , Wang Jun , Yuan Kai , Peng Zi Qiu , Jiang Ya Dong
Published: October 2011

Micro-bolometer using double sacrificial layers with smaller pixel size and higher resolution has been a new trend for microbolometers. Optical design and simulation of microbolometer with double sacrificial layers were analyzed in this article. Also, the manufacture, test and optimization of doule layer structure were discussed. The micro-bolometer cell structure models were constructed and simulated with Intellisuite software. The devices with and without umbrella structure were compared in this paper. The models of different structure and manufacture conditions were simulated with Intellisuite, such as the thickness of micro-bridge, the width of legs and the residual stress of thin films.
Quantitatively Calculated Parameters Configuration of Concrete Pump Accumulator
Authors: Wang An Lin , Shi Zhong Qiu , Hu Yu Qin , Yuan Cai Xing
Published: October 2011

In order to solve the problem of the response time of concrete pump distribution circuit unmatching pumping construcution requirement,which caused by selecting accumulator based on experience, the parameter configuration of the accumulator was quantitatively expressed. The response time of the distribution circuit is divided into switch time of S tube distribution valve and accumulated pressure differential time of the accumulator. In order to meet the requirements of the response time of the pumping construction, based on the existing parameter configuration of the accumulator, with dynamic characteristic equation and gas state equation respectively, the switch time of S tube distribution valve and accumulated pressure differential time of the accumulator is quantitatively calculated, and the parameters of the accumulator is configurated.Compared to the traditional accumulator choice method, namely selecting accumulator according to experience and testing whether the response time of the distribution circuit is reasonable, quantitative calculated parameter configuration of concrete pump accumulator is more accurate, and can fully meet the requirments of pumping construction. This method also provides theoretical basis for design and choice of engineering machinery accumulator.
Development of an Integrated System of Geometric Modeling and Machining Simulation of End Mill
Authors: Li Rong , Chen Xue Feng , Ding Guo Fu , Liu Jian Jun , Jin Xiao Bo
Published: October 2011

An integrated system of geometric modeling and machining simulation of end mills is presented for supporting end mill’s cutting analysis, structural optimization and digital manufacturing. In order to obtain accurate structural models, the main elements and detail features of end mills are modeled precisely, based on modular design and parametric design methodology. Through integrates 2D tool path and 3D virtual machining simulation seamlessly, a comprehensive simulation platform is constructed. To ensure the accuracy of manufacturing simulation model, the machining simulation model is compared to ideal design model. The results verify the correctness and rationality of the geometric modeling and machining simulation. NC codes generated by machining simulation can be output to tool grinder, supporting digital manufacturing of end mills.
Innovative Design and Static Analysis of Magnesium Alloy Automobile Wheel
Authors: Han Shan Ling , Yang Lei , Wang Gui Shen , Zeng Qing Liang
Published: October 2011

The utilization of magnesium alloy wheels is useful for automobile lightweight. A kind of magnesium alloy wheel was designed by using TRIZ theory, and then the three-dimensional CAD model was created using UG NX 7.0. According to these, the static structural analysis of the magnesium alloy wheel had been simulated with finite-element method. It can be shown that the high stress distributes mainly in the region of bolt holes and the transitional region between the rim and spokes of the wheel. The maximum stress is less than the yield stress of magnesium alloy. Some valuable references are provided for the design and development of magnesium alloy wheel.
A New Method of Data Processing Based on Geomagic Studio and Imageware in Reverse Modeling of Equipment Parts
Authors: Tu Qun Zhang , Zhao Jian Xun , Su Da Zhen , Yan Jun
Published: October 2011

The processing flow of data clouds is analyzed concretely. Based on software Geomagic Studio and Imageware, a new method of data processing for point clouds is put forward, and the scheme of data processing is designed. Taking a mechanism part for example, the practical application is performed, and proves the feasibility and practicality of the method.
Preparation and Characterization of Flowerlike Nickel Oxide
Authors: Li Chang Yu , Liu Shou Xin , Liu Li Li
Published: October 2011

Flowerlike nickel oxide was synthesized by a simple liquid-phase process to obtain the hydroxide precursor and then calcined to form the nickel oxide. The precursor and the nickel oxide were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TG) , the scanning electron microscope(SEM) and Brunauer–Emmett–Teller-specific surface area measurement. The results indicated α-Nickel hydroxide was transferred to NiO with a cubic crystalline structure after being calcined at 450 °C; the NiO still kept the morphology of the precursors and the specific surface area of the NiO was 125.2m2/g.
Study on the Memory Properties of Fractional Order Differential to Signals
Authors: Liu Yu Ran , Hou Ming Liang
Published: October 2011

By comparing and analyzing various orders coefficient curves of fractional order, this article studies the influence of order to the extraction of signal memory information, and then extends the result to image processing, as well as analyzes the influence of fractional order differential order to texture information extraction, then gives the order scope of texture information extraction.
The Experimental Research on 2×2 Game with Unique Mixed Strategy Nash Equilibrium
Authors: Cheng Hong , Huang Mei Ping , Su Ying Sheng , Wang Xian Yu
Published: October 2011

This paper reports the results of an experimental study of playing a simple 2×2 non-zero sum game with asymmetrical payoff function. Subjects make decisions about their estimation for their opponent, and then each of them chooses a strategy after their roles are changed at random. As a result, steady states which subjects estimates are quite different from those predicted by the Nash equilibrium theory. Through comparative analysis, it is found that the selections of strategies are related to others’ payoff as well as subjects’ own return. And what is more, the subjects’ risk attitudes influence the choice of game.
The Research on Macro Charged Jet Phenomenon and its Orderly Collection
Authors: Liu Yuan Yuan , Li Qing Wei , Hu Qing Xi , Jing Chang Juan , Wang Qiang Gao
Published: October 2011

Macro charged jet molding combines with Rapid Prototyping and electrospinning together, it solved the problem of insufficient forming precision with RP molding and the difficulty of collection with electrospinning which caused by highly injection speed and small diameter. This article talks about Macro charged jet phenomena of PEO solution and its influence factors through experiment, detected diameter of the shoot fluid by using microscope, measured micro-injection speed by using the rotating disk with linear motion collection device, achieved orderly collection of Macro charged jet with different diameter and injection speed.
Based on PLC in the Coin Cell Production Line Fault Diagnosis
Authors: Wang Wen Jiang , Sun Hui Lai , Lin Shu Zhong
Published: October 2011

Expert system using fault tree with a combination of mixed diagnostic method designed coin cell production line fault diagnosis system. It will describe the analysis of faults structure in the system. According to the hierarchical model of fault structure, it is divided into fault tree diagnosis section and expert system diagnostics section. And it will analyze the two diagnostic methods of reasoning mechanisms.
Numerical Simulation of the Influence of Deposits on Heat Transfer Process in a Heat Recovery Steam Generator
Authors: Mu Lin , Yin Hong Chao
Published: October 2011

Flue gas entrains a large number of ash particles which are composed of alkali substances into the heat recovery steam generator (HRSG). The deposition of particles on the tube surface of heat transfer can reduce the heat transfer efficiency significantly. In the present work, an Eulerian- Lagrangian model based on Computational Fluid Dynamics (CFD) is implemented to simulation flue gas turbulent flow, heat transfer and the particle transport in the HRSG. Several User-Defined Functions (UDFs) are developed to predict the particle deposition/ rebounding as well as the influence of physical properties and microstructure of deposits on the heat transfer process. The results show that only after one day deposition, the total heat transfer rate reduces 27.68% compared with the case no deposition. Furthermore, the total heat transfer rate reduces to only 238.74kW after 30 days of continuous operation without any slag removal manipulation. Both numerical simulation and field measurement identify that the deposits play an important role in the heat transfer in the HRSG. Especially, when the deposits can’t be removed designedly according to the actual operating conditions, the HRSG experiences a noticeable decline in heat transfer efficiency due to continuous fouling and slagging on the tube surface.
A High Robust SRAM Bitcell under Optimum-Energy Supply Voltage
Authors: Bai Na , Li Rui Xing , Gong Zhan Li , Tan Shou Biao
Published: October 2011

Simulation results illustrate that there is an optimum-energy supply voltage point (Vopt) for SoC. And these voltage points normally lie in weak sub-threshold or near-threshold region. Considering about the degraded robustness under this low supply voltage, structural change instead of the sizing change is considered in proposed design. Different from conventional 6T SRAM design, the trip point voltage of proposed design changes according to bit-line voltage values. In this way, its read margin is 45% greater than conventional 6T SRAM. The proposed bit-cell exhibits wide hysteresis effect, making the design less vulnerable to process variation. Its hold margin is 30.2% greater than conventional 6T SRAM. The optimum-energy supply voltage of proposed array (256×16) is 400 mV. At the same time, the power consumption at 400 mV decreases to 16% compared to that at 1200 mV.
Evolution of Micro-Orientations on Non-Oriented Silicon Steels during the Annealing Process Based on the CSP
Authors: Jin Zi Li , Li Wei , Guo Li Zhen
Published: October 2011

In this paper, studied was the low carbon and low silicon (0.003%C,0.3%Si) cold-rolling steel sheet whose reduction ratio was 81% annealed at 870 °C in the laboratory salt-bath furnace and heated for 180s.The evolution of micro-orientations of grain coarsening at 1050°C and 1150°C on cold-rolling samples that were annealed at temperature 870°C and heated for 180s was studied by EBSD technology.
The Double-Station Fixture Based on Air-Liquid and Air-Liquid-Mechanical Composite Transmission Technology and its Application in Press
Authors: Zhong Kang Min , Xiao Ying Hua , Wang Ming Di
Published: October 2011

When adopting the air-liquid and air-liquid-mechanical composite transmission technology, the comparative advantages of various transmission techniques can be played, while their shortcomings can be avoided. The efficient fixture and press with double-station based on these composite transmission technology are introduced, and their working principles and mechanical formulas are given out. The innovative design of the fixture and press with double station can achieve the two station order-processing operations when only using one drive cylinder, which have high efficiency, the large output force, and will not pollute the environment.
Experimental Investigation on the Heat Transfer Properties of Micro-Channel Flat Plate Heat Pipe
Authors: Liu Dong Yao , Ding Xian Hu
Published: October 2011

The surface temperature and equivalent heat conductivity of Flat Plate Heat Pipe (FPHP) under different heat flux, liquid filling and tilt angles are investigated experimentally. Electrical discharge machining (EDM) micro-channels wick are select as the wick inside FPHP. A set of experimental facility to measure the temperatures of FPHP is build up. The surface temperature along channels under different tilt angles, liquid filling and heat flux are measured by thermal couples. The results indicate that the temperatures are independent to the tilt angles and liquid filling. The equivalent thermal conductivity increases with the increasing of heat flux, and is 1.36 to 1.44 times to that of brass.
DrawLight: Learning Colors by Creating Physically Interactive and Immersive Lighting
Authors: Ying Fang Tian , Shi Yan , Yao Li Ning
Published: October 2011

In this paper, we present DrawLight, a physically interactive and immersive lighting system aimed at young children, ages two to six, to help them learn colors and immerse themselves into their imaginary colorful environment by creating correspondent ambient lighting through their former paintings and colorful objects combination. As the same time as children are drawing colorful pictures, playing with colorful objects, or hanging painting somewhere inside the space, specially designed ambient lights will change to the correspond color mode. DrawLight invites children to explore the transformation from concrete colorful painting and physical objects into abstract ambient lighting, which gives children an immersive impression about the color effect. General terms: Children, painting, colorful physical objects, color learning, creating interactive and immersive lighting
Optimization for Turning Metal Matrix Composites with Multiple Performance Characteristics
Authors: Sriprateep Keartisak
Published: October 2011

In this paper, an optimization technique for turning metal matrix composites (MMCs) is proposed using the Taguchi method with multiple performance characteristics. The orthogonal array, multi-response signal to noise (S/N) ratio and analysis of variance (ANOVA) are employed to study the performance characteristics. The cutting parameters (cutting velocity and feed) and cutting time are optimized with consideration of multiple performance characteristics including tool wear, surface roughness and the power required to perform the machining operation. The results showed that cutting time was the dominant variable on multiple cutting performance characteristics. Confirmation tests of the optimal levels with the initial cutting parameters are carried out in order to illustrate the effectiveness of this method in turning metal matrix composite.
Research on the Flow Field of the Exhaust Valve for High Temperature Booster Pump
Authors: Wu Bo , Li Jian Ying , Li Jin Cheng , Shao Jun Peng
Published: October 2011

Exhaust valve is the key component of the reciprocating high temperature booster pump, its performance will directly affect the characteristic of the reciprocating high temperature booster pump. In order to improve the performance of the booster pump from structural optimization design, two types of exhaust valve are designed. Finite volume method is used to simulate the velocity filed and pressure field of the two types of exhaust valve. Simulation results show that the velocity gradient and pressure gradient of the cone-type exhaust valve is smaller and more uniform than the disk-type exhaust valve, and the performance of cone-type exhaust valve is better than the performance of disk-type exhaust valve, which provides the valuable theoretical basis for the exhaust valve in the practical production.