bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation and Optimization of a New Hydraulic Impactor
Authors: Zhao Hong Qiang , Liu Peng , Shu Min Fei , Wen Guo Chen
Published: October 2011

Based on assumed condition, this paper sets up the digital simulation model and basic movement equations of a new hydraulic impactor’s dynamic mathematics numerical model. Upon analysis, the result of the simulation and optimization is close to that of the test, which indicates that the simulation and optimization dynamic mathematics numerical model is correct. This model facilitates accurate analysis of parameters affecting the property of impactor, thus providing a better design method for the optimization design of hydraulic impactor.
Study on the pin Track of Four-Bar Linkage with Clearances
Authors: Yuan Ying Cai , Li Yan , Liu Xin
Published: October 2011

The pair clearance is inevitably exists in the mechanical system. With the speed of mechanical system increasing, clearance does harm to the stability and precision of mechanical system. Using four-bar linkage as the example to research the clearances’ characters, a dynamics model is established based on the kinematics and dynamics relations of the mechanism. Through the dynamics model, the track of pin center to collar in pair can be gotten. The irregularity of pin center track is related to the clearance and velocity and seriously influences the mechanical performance. So, it has to pay more attention to the clearance, especially in high speed.
Study on the Construction Process Control Claims Management
Authors: Chen Chang Bing , Wang Duo Ci
Published: October 2011

Engineering construction counterclaim occupy a very important position in the construction project cost management, is also a key part in engineering settlement audit. This paper introduces the properties, claim evidence, procedures, cost calculation and management etc. To safeguard the lawful rights and interests of all parties construction, to promote the healthy development of the construction industry.
Production Management for Manufacturing Based on Activity-Based Costing
Authors: Liu Yan Hong , Gong Shu Lin
Published: October 2011

In order to solve the current problems of cost management in manufacturing industry by using traditional management accounting systems, two-stage approach analytical method of activity-based costing is presented. The proposed method allocates indirect costs to products based on cost drivers of various levels. There are many advantages of the proposed method, it can make the production processes more transparent, help to identify production efficiencies, encourages managers to introduce corrective actions, allow the evaluation of corrective actions to be undertaken, reduce costs, and enhance competitiveness of enterprises. A case is analyzed, it is seem that the peoposed method is of efficiency and feasibility.
Improved Algorithm of Image Scaling Based on Edge Features and its VLSI Implementation
Authors: Sun Hua Fang , Lu Shu Fang , Chen Shu Li
Published: October 2011

Abstract: Causes of defects in common image scaling algorithms are summed up at first in this paper. Then a new image scaling algorithm based on edge features is presented to inhibit the defects. The algorithm is also improved by simplifying the calculation, making it more suitable for VLSI implementation. The improved algorithm can greatly reduce the computation and obtain a good visual effect at the same time. It can increase the computing speed and save a lot of chip resources.
Grey Modeling Method of Wear Prediction for Reciprocating Machinery Based on Spectrum Analysis
Authors: Wang Li Yong , Xu Xiao Li , Wu Guo Xin
Published: October 2011

Oil spectrum analysis technology is an important method to research wear of mechanism without unpacking, based on the characteristics of limited amount of oil analysis samples and randomness of sample data changes to apply gray theory to prediction of wearing capacity of reciprocating engine. When gray modeling, if sample data does not meet smoothness conditions, firstly parametric process is carried out for the data in order to weaken randomness of the original random sequence, then equal interval process for initial data sequence is conducted and sequence of gray values is determined according to variation rules of sample data, finally, base on four-dimensional data to carry out unequal interval process by timing fitting method. Test confirms that gray modeling by timing fitting methods based on wearing law to determine gray values point can significantly increase prediction accuracy of wearing capacity.
Fatigue Strength and Modal Analysis of S195 Engine Crankshaft
Authors: Wang Jian Hua , Hua Jian , Li Chao
Published: October 2011

Fatigue rupture is the major reason of crankshaft parts failure. Traditional fatigue analysis is fairly complicated and causes a great error. The finite element model of s195 engine crankshaft is created under SolidWorks environment, whose static analysis and fatigue analysis is carried out by using Simulation module. Also the vibration character of the crankshaft is calculated through modal analysis. Result shows the fatigue strength of the crankshaft is enough and it will not produce resonance in operation.
Channel Mill’s Top Shell Prototyping with the Single Point Incremental Forming Technology of Sheet Metal
Authors: Liu Gang
Published: October 2011

First of all, the theory and application of the Single Point Incremental Forming (SPIF) technology of sheet metal are introduced at the beginning of this paper; second, several traditional forming technologies of channel mill’s top shell are compared; third, The advantages of SPIF Technology of Sheet Metal in channel mill’s top shell prototyping are analyzed; finally, the steps and methods of channel mill’s top shell design and prototyping with SPIF technology are elaborated through a real business case.
Optical Design of LED Street Lights
Authors: Xu Ying Chao , Zhu Wen Zhang , Lin Hong Yi , Xiong Fei Bing
Published: October 2011

High-power light emitting diode (LED) develops greatly owing to its energy efficiency, light mono-direction and long operating life. But it is critical to have a secondary optics design for the LED street light, for obtaining good output efficiency and light distribution pattern. This article introduces many advantages of LED as street lightings source, and also analyzes the status and features of LED lamps’ application as street lightings. This article mainly designs a secondary optical light distribution implement using Lighttools 7.1. This paper also gives an example of one kind of freeform surfaces lens which can realize rectangular light shape.
Optimal Design of the Curvilinear Tapered Coat-Hanger Die
Authors: Meng Kai , Zhao Zi Long
Published: October 2011

A preliminary study of optimal designing the curvilinear tapered coat-hanger die is conducted by the method of evolution strategy combined with the finite element method. The design parameters are searched according to the evolution strategy and the objective function is achieved by the three-dimensional finite element method. Design results are attractive in very low coefficient of variation of polymer flow velocity at the die outlet. It shows that the provided method is feasible and effective in the design of the curvilinear tapered coat-hanger die. However, For the purpose of decreasing the coefficient of variation value further, both the curve equation and the tapered equation of the manifolds should be considered.
Secondary Development Research of Historytree
Authors: Ge Liang , Cai Ling
Published: October 2011

Based on 3D design software and taking the design of automobile driver seat for instance, this paper studies the secondary development technology and writes general program of historytree. It forms image database through parts historytree query, re-construct tree-view control by data, and updates parts.
Study on Design Method of Magneto-Rheological Fluid Shock Absorber Employing Shear Rate Profiles and Experimental Tests
Authors: Liao Chang Rong , Hao J.H. , Zhao D.X. , Wang K.L.
Published: October 2011

The flow differential equation for Magneto-rheological (MR) fluids in annular channels of MR fluid shock absorber is set up and several rational simplifications are made. Analytical shear stress profiles of MR fluids through annular channels are obtained via solution of the flow differential equation. An analytical study on MR fluid shock absorber is present employing shear stress profiles. Both boundary conditions and compatible conditions are established. Both flow velocity profiles and total volumetric flow rate are developed by integration by parts and numerical integration. The prediction method for damping force of MR fluid shock absorber is developed via simultaneous equations. The analytical study on MR fluid shock absorber is validated by means of reformative Herschel–Bulkley constitutive model, in which flow velocity profiles and flow regions boundary radii are drawed. A MR fluid shock absorber, which is designed and fabricated in Chongqing University, is tested by electro-hydraulic servo vibrator in National Center for Test and Supervision of Coach Quality. The experimental results reveal that the methodology is able to predict damping force of MR fluid shock absorber via shear rate profiles and experimental damping forces are in good agreement with analytical those.
Study on the Method of Pavement Quality Test and Device Design
Authors: Si Jun Shan , Shi Hong , Shi Xian Jiang
Published: October 2011

This paper presents a practical method for engineering test on the base of mechanical eccentricity principle, and a new vibration test equipment for testing the quality of pavement is designed. A sensor was installed on the exciting bar for measuring the exciting force and frequency which generated by the equipment. The mechanical performance could be detected according to the deformation of object. The equipment has the merits such as small volume, light weight and compact conformation. It can be used not only in laboratorybut also in field and has great practical value.
The Research on Image Segmentation Based on the Minimum Error Probability Bayesian Decision Theory
Authors: Chen Zhi Yuan , Luo Gang , Fei Zhi Gen
Published: October 2011

The image segmentation technology has been extensively applied in many fields. As the foundation of image identification, the effective image segmentation plays a significant role during the course of subsequent image processing. Many theories and methods have been presented and discussed about image segmentation, such as K-means and fuzzy C-means methods, method based on regions information, method based on image edge detection, etc. In this work, it is proposed to apply Bayesian decision-making theory based on minimum error probability to gray image segmentation. The approach to image segmentation can guarantee the segmentation error probability minimum, which is generally what we desire. On the assumption that the gray values accord with the probability distribution of Gaussian finite mixture model in image feature space, EM algorithm is used to estimate the parameters of mixture model. In order to improve the convergence speed of EM algorithm, a novel method called weighted equal interval sampling is presented to obtain the contracted sample set. Consequently, the computation burden of EM algorithm is greatly reduced. The final experiments demonstrate the feasibility and high effectiveness of the method.
Visual Psychology and View Methods in Modern Calligraphy Education
Authors: Li Dan Ying , Li Jian Zhong
Published: October 2011

This paper introduces composition of painting and western view methods as part of specialized training in college calligraphy education, so as to enlarge students’ visual information, improve their ability of analyzing calligraphy works, cultivate creative thought, increase their sensitivity to inspiration from various art forms besides calligraphy, and help them develop the habit of observing with great sensitiveness.
Production Improvement of the Bacterial Cellulose by Taguchi Method
Authors: Lin Jun Hong , Lin Ya Yin , Chen Yu Hsuan
Published: October 2011

The production rate and pellicle thickness of bacterial cellulose (BC) from Gluconacetobacter xylinus ATCC 23768 could be improved by Taguchi method. The initial pH is the important factor of medium to affect the BC production. After the confirmed experiment, the optimum modified YPD medium is: initial pH=4.5, glucose concentration = 2% (w/v), acetic acid concentration= 1.5% (v/v), medium volume = 430 mL and vessel basal area = 246 cm2. By the modified factors and levels, the maximum wet BC production rate and wet film thickness could be increased 53.1% to 111.90 g-BC/L and 43.3% to 4.43 mm, respectively. Higher basal area could get higher pellicle production rate.
Study on Contact Characteristic of Globoidal Continuous Cam with Ball
Authors: Feng Xian Ying , Li Hui , Yue Ming Jun , Su Yan Ying
Published: October 2011

Globoidal continuous cam with ball is a new type of transmission mechanism which can realize rolling instead of sliding. By designing the double-circular arc raceway and reforming ball seats of the indexing plate, energy loss caused by friction in the meshing movement can be decreased greatly. In this paper, firstly, the raceway is designed and the integral structure is presented. Then, the contact characteristic between raceway and steel balls is further studied based on Hertz theory; the influence of structural parameter to contact stress is discussed and methods for enhancing the load capacity of cam mechanism are proposed. Finally, the load distribution model of the ball seat is established through Stribeck load distribution theory, the meshing characteristic between ball and the ball seat is investigated. This research provides theoretical basis for the design, manufacturing and experimental study of globoidal continuous cam with ball.
Design of Building PV Power Station Data Transmission and Monitoring System Based on ZigBee
Authors: Yao Zhong Min , Liu Xi Guang , Wang Ya Zhen
Published: October 2011

With the application scale and area of the building PV power station continuous extension, data transmission and monitoring management of the building PV power station have become increasingly important.This paper introduces a kind of data delivering and distributed monitoring management system of the building PV power station based on ZigBee wireless network,this system has information transmission modules based on ZigBee wireless network, region monitoring and magement module and remote access module. ZigBee wireless network could deliver datas of the building PV power station to the center of region monitoring and management system,ultimately,the datas were deposited in the database of region monitoring and management system,The Electricity Regulatory Office and The Power Company used remote transmission and monitoring system by remote access system on the Internet, to access data reports of the building PV power station in the database of region monitoring and magement system.System test results can carry out the building PV power station’s data transmission, monitoring system’s data management and remote access by the Internet.
Error Compensation on a NC-Machine Tool Based on Integrated Intelligent Computation
Authors: Zeng Huang Lin , Sun Yong , Ren Xiao Hong , Liu Li Xin
Published: October 2011

This paper is a study of the application of integrated intelligent computation to solve the problems of error compensation for high-precision a NC machining system. The primary focus is on the development of integrated intelligent computation approach to get an error compensation system which is a dynamic feedback neural network embedded in a NC machine tool. Optimization of error measurement points of a NC machine tool is realized by way of application of error variable attribute reduction on rough set theory. A principal component analysis is used for data compression and feature extraction to reduce the input dimension of a dynamic feedback neural network and reduce training time of the network. Taking advantage of ant colony algorithm on training of a dynamic feedback neural network does the global search so that network can converge to get a global optimum. Positioning error caused in thermal deformation compensation capabilities were tested using industry standard equipment and procedures. The results obtained shows that this approach can effectively improve compensation precision and real time of error compensation on machine tools.
Research of Spindle Runout Testing Methods
Authors: Gao Yi , Cao Guo Hua , Xu Hong Ji , Yu Zheng Lin
Published: October 2011

The paper aims at the analysis of machine spindle runout characteristics and designs of a laser displacement sensor in non-contact spindle runout measurement system. To ensure accuracy, we designed the laser displacement sensor calibration device, and the test calibration experiment was carried out by using laser displacement sensor. Experimental results showed that the test methods met the accuracy requirements of test system.
Bilingual Teaching Design and Teaching Case of “Advanced Manufacturing Technology”
Authors: Xiao Fan , Peng Wei , Yao Jian Hua , Ni Hao
Published: October 2011

This article discusses the influence factors of bilingual teaching effect by bilingual teaching practice of the Advanced Manufacturing Technology, and proposes solutions. Practice shows that the reform of teaching idea is the prerequisite for the effective bilingual teaching, and PBL teaching model is the effect ways to improve the effects of bilingual teaching.
Synthesis and Characterization of PVP/Eu4/3L(phen)•2H2O Luminescent Complex
Authors: Ren Hui Juan , Yang Hua , Sun De Hui , Cui Zhen Feng , Hong Guang Yan
Published: October 2011

Rare earth europium (Eu(III))-pyromellitic acid (H4L)-1,10-phenanthroline (phen) ternary luminescent complex has been synthesized in polyvinylpyrrolidone (PVP) matrix by precipitation method. The chemical constitution of the complex has been demonstrated as PVP/EuL4/3L(phen)•2H2O by a combination of elemental analysis, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and Fourier-transform infrared spectroscopy (FT-IR). X-ray diffraction analysis (XRD) has shown that the complex is a new kind of crystal whose structure is totally different from two ligands. The morphology of the complex has been investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results have shown that the complex has a rodlike crystal structure and the diameter of the rod is about 400 nm. Thermogravimetric analysis (TG) has indicated that the luminescent complex is thermally stable below 300 °C. Photoluminescence spectra (PL) have revealed that the complex can emit Eu3+ characteristic red fluorescence under ultraviolet excitation.
Quasi-Robust Blind Deblurring with Multiple Color Images
Authors: Liu Rui Hua , Li Fang , Su Li Yun
Published: October 2011

In this paper, we firstly introduce the limitation and deficiency of L1-norm and L2-norm in deblurring and denoising and the merit of quasi-robust function. Then, we propose a new blind deblurring model using multiple color images. Finally, we give some simulations and the results show the effect of our new model for color degraded images. To see how well our algorithm compared against the non-blind deblurring model.
Influence of Convalescence on Soil Temperature Field around a Vertically Buried Single-U-Tube Ground Heat Exchanger
Authors: Du Zhen Yu , Zhang Yi Xing
Published: October 2011

The mathematical physical model of the heat and moisture transfer in the single-U-tube heat exchanger of a ground source heat pump (GSHP) is validated using observed data from the practical rock-soil thermal response test on a resident district in Taiyuan, the soil is layered according to the geological structure of an actual drill in the depth direction in this model. Inputting the dynamic design cooling and heating load of the district into the Realizable turbulent model in Fluent, the temperature fields of a single well in the GSHP project running for 1 year in 2 conditions in which convalescence is considered and not, are simulated numerically. It shows that it rather necessary to take the influence of convalescence into consideration while predicting the soil temperature field of a GSHP system running for a long term, or may not correspond to the reality and make a wrong theory guide to the practical engineering.
Sealing Structure Analysis of a Non-API Tubing Connection during Load Envelope Test
Authors: Wang Peng , Hu Mei Juan , Shen Zhao Xi , Li Lei , Feng Chun
Published: October 2011

In the paper, a non-API tubing connection’s sealing structure is analyzed through numerical simulation. It is very important for sealing integrity to maintain intimate and usually high contact stress of mating metal surfaces under different loading. First, the contact pressure of main sealing surface and torque shoulder surface generated by interference fit after make-up procedure is analyzed. Then, the variation of contact pressure of sealing system during the load envelope test consisting of the axial loads and internal pressure is analyzed. The analysis results can be used to optimum design and operational suitability test of non-API tubing connections.
Theoretical Research on Hydro-Viscous Transmission to Power Equilibrium in Multi-Motored Starting of Belt Conveyor
Authors: Hao Ni Ni , Yu Yan , Liu Hua Wei
Published: October 2011

Through research on the importance of power equilibrium in multi-motored starting of belt conveyor, this paper concluded that the factors which influenced the power equilibrium and how to achieve power equilibrium. With the example of hydro-viscous soft start device, this paper introduced the principles of hydro-viscous transmission and put forward concrete adjusting methods of staring power equilibrium in multi-motored belt conveyor. Based on the analysis and design above, finally power equilibrium controlling system in starting progress was designed.
Influencing on the Wall Thickness of Deep Cavity Injection Molding Shell
Authors: Yang Li Yun , Zhang Jia Min
Published: October 2011

The quality question of deep cavity shell was the wall thickness, its influence factors, together with the product structure, die-structure, technology and other factors. The reasons of molding the wall with a thick beyond tolerance were discussed from products design, molding equipment and die, forming technology and material properties for a comprehensive analysis, and the corresponding resolution methods were presented.The methods of the adjustment of a cavity molding were introduced.
Vibration Mode of Gearbox in Test Bed of Gear with Intersecting Axis
Authors: Jin Xiang Yang , Zhang Tie Feng , Zhao Li Li , Zhang Li , Wang Yang Jun
Published: October 2011

A test bed of closed-end mechanical beveloid gear with intersecting axes is designed to measure various parameters. In order to analyze the reasonableness of the structural design and test the performance of the test bed, a three-dimensional solid simulation model of the test bed is set up first with virtual simulation technology to analyze motion characteristics of test-bed and modal analysis to analyze the vibration characteristics of the key components. Simulation test obtains the vibration mode of the test gear box and drive gear box, providing a useful result for the optimization of the test bed. This solves some problems such as that a common test bed cannot test gear with intersecting axis and must have the same test pair gear, and inaccuracies of measuring transmission efficiency.
A Study on the Impact of Deflection Angle and Revolving Speed of Stirring Blades on Reactor Flow Field
Authors: Wu Yu Lieh , Sun Tzu Wen , Liu Wang Lin , Chuang Wei Yen
Published: October 2011

Stirring blades are the most important part of the reactor. Blades transmit the mechanical energy to the liquid through self-rotation, thus generating high degree turbulences in neighboring areas, and forcing all the liquid to flow inside the tank on a certain route for recycling. This study analyzed the speed deviation and turbulence intensity inside the reactor in case of two or four propeller blades at 45 degree forward, 45 degree backward, or at no deflection angle to explore the impact of different revolving speeds on the flow field inside the reactor. Results suggested that when the blade at positive deflection angle should be applied to generate larger turbulence intensity in the lower flow field to more easily mix relatively weighty particles or quality dispersion.
Preparation and Characterization of ZnO Nanostructures with Different Precursors via Solochemical Technique
Authors: Gusatti Marivone , Maduro de Campos Carlos Eduardo , Barroso Gilvan Sérgio , Ribeiro de Souza Daniel Aragão , Riella Humberto Gracher , Kuhnen Nivaldo Cabral
Published: October 2011

In this work, the precursors zinc nitrate hexahydrate and zinc chloride were used to synthesize zinc oxide (ZnO) nanocrystals, applying a simple solochemical technique. ZnO rod-like nanostructures were successfully obtained by chemical reaction between NaOH and zinc nitrate hexahydrate at 90 °C. The sample formed by chemical reaction between NaOH and zinc chloride at 90 °C showed the ZnO phase mixed with the Zn5(OH)8Cl2•H2O phase. Only after thermal treatment at 500 °C for 3 hours, the conversion of Zn5(OH)8Cl2•H2O in ZnO was achieved. The samples prepared with different precursors were characterized by X-ray diffraction, Raman spectroscopy and transmission electron microscopy. Rietveld analysis to the X-ray diffraction data indicated that ZnO nanocrystals obtained have hexagonal wurtzite structure and nanometric-sized crystallites.
Analyst the Inherent Characteristic of the General Support Pipeline with DQ Method Based on Matlab Programming
Authors: Qin Jiang , Yuan Xin Mei , Huang Yu Zhou , Xiang Hai Lin
Published: October 2011

The Differential Quadrature Method（abbreviated as DQM）is easy to be implemented by computers to solve many problems in engineering mechanics. In the field of pipe vibration methods are mainly finite element method , finite difference calculus and so on. In the formation of coefficient matrix these methods need to calculate a large number of numerical integration , resulting in low efficiency, while we can use matlab to program, taking the advantage of easy programming of DQM, after establishing mathematical model of the pipe conveying fluid .The program designed in this paper can be a very good solution to pipe nature frequency.After obtaining the nature frequency, we have analyzed the relationship between pipe length and nature frequency and have found out the critical value of the pipe length. The method can also be applied to engineering filed related .
Application of the Block Correction Interpolation Technology in the Ultrasonic Temperature Measurement
Authors: Xie Feng Qin , Zhang Hua Yu , Xiao Lin Jing , Ding Hong Chang
Published: October 2011

A new method about the air temperature reconstruction based on the block correction interpolation was put forward. Its theoretical basis is the principles of thermodynamics relations and ultrasonic temperature measurement. The frequency of ultrasonic generator is 40 KHz. Because of the one-to-one relationship between gas temperature and gas velocity, the gas temperature field can be reconstructed through the rebuilding of velocity field. As the distance between the generator and receiver is known, so the average speed on the path can be obtained by detecting the ultrasonic transit-time. After obtaining the average speed of many paths in the field, the correction of the measured data can be done by using the block correction interpolation technology. And through the mathematical analysis software, the reconstruction of the measured field was given.
Application Research Color Management in the Transfer Printing Based on the Linear Regression Algorithm
Authors: Guo Ling Hua , Zhang Mei Yun , Guo Xin Hua , Liu Guo Dong
Published: October 2011

There are many factors that effect the quality of the heat transfer printing products. The CRT in prepress is the most important factor. In this paper, the color ladder segmentation is spaced at 5. The color of the CRT is tested with X-RITE color monitor optiomizer. According to the data and the curve, the function model of color characteristic features is set up. We made the common test plates which is to verify the error of the function model. As a result, The range of color error in the heat transferring printing is reduced. The color management profile is put forward, the quality of transferring printing is improved. A reference is provided for the color management in the heat transfer printing.
Comparison of Effects of Dimensional Manufacturing Tolerances and Journal Out-of-Roundness on Stability of Hydrodynamic Journal Bearing System
Authors: Xu Wu Bin , Zhou De Jian , Ogrodnik Peter , Goodwin Mike
Published: October 2011

The manufacturing tolerances of a hydrodynamic journal bearing system are inevitable in manufacturing process. To examine and understand the effect of manufacturing tolerances on the system stability can help engineers to confidently choose reasonable tolerances at design stage. This study presented a theoretical analysis method to determine and compare the effects of dimensional manufacturing tolerances and journal out-of-roundness on system stability by Taguchi method. The results show that the journal out-of-roundness has the most significant effect on the system stability and the journal out-of-roundness appears to stabilize the system. The authors suggest that both dimensional manufacturing tolerances and journal roundness should be taken into account in the design of cylindrical journal bearings.
Research on Automatic Test System of Radar Board Based on Virtual Instrument Technology
Authors: Du Wei Ming , Liu Cai Bin
Published: October 2011

Following the test work is difficult and complex in the modern radar maintenance support, the automatic testing of radar board is necessary for the radar maintenance man. A automatic test system of radar board based on virtual instrument technology is discussed. The system used PXI bus technology and Labview program language. The design of automatic testing system is given, its hardware solution and software solution is designed. And finally the reliability and expansibility of system design is discussed at last.
Fixture Optimization for Robotic Belt Grinding System
Authors: Zhang Dong , Yun Chao , Zhang Ling
Published: October 2011

The precision is impacted when the robotic grinding path is discontinuous and the gripper needs to be replaced during manufacturing. In order to solve this problem, a new type PPPRRR grinding robot was proposed. The mathematical model for the robotic grinding paths was set up. The factors including the pose of the workpiece respect to the end joint and the position of contact wheel respect to the robot base frame {O}were analyzed to influence the grinding ability of the system. Base on the Monte Carlo method the posture and position factors above had been optimized, and the grinding ability of the system was increased. The optimization methods were proved right and workable by grinding golf head experiment.
Kinematics Simulation Analysis of Shots in Shot Blasting Machine Based on EDEM
Authors: Hou Lin , Yang Li Ying , Wang Ying Zi , Wang Shou Ren
Published: October 2011

A three-dimension discrete element model of the shot blasting machine has been established to study the principles of shots flow motion in shot blasting machine. The three-dimension discrete element method (EDEM) was used to analyse the shot-motion process inside the shot blasting machine. The dynamic law of shots motional process inside shot blasting machine was shown through simulation.
Modeling and Simulation of Milling Forces for Ball-End Cutter with Considering Comprehensive Factors
Authors: Sui Xiu Lin , Zhang Ping
Published: October 2011

In this paper, influence mechanism of variously physical factors for milling force in any feed direction is studied during the milling process. Firstly, the effects of spindle eccentricity, cutter deflection and cutter vibration for the instantaneously undeformed cutting thickness are analyzed, and the mathematical expressions of chip thickness is set up. Then,on this basis of cutting force and chip load, the milling force model of ball-end mill with considering integrated physical factors is established though the differential method, and a simulation system for prediction of milling forces during the milling process is developed. This milling force model is verified through simulation and analysis of milling forces.
Nonlinear Model and Simulation Experiment Research of Vibratory Rollers
Authors: Hao Yuan , Ren Zhao Hui , Wen Feng
Published: October 2011

On the basis of the relation between force and deformation when the plastic deformation of soil mass is studied, nonlinear vibration roller model is built. Based on one type vibratory rollers select the system parameters and calculate the natural frequency. And according to the selected numerical value proceed the numerical simulation with different excitation force frequencies. Meanwhile, obtain and analyze the experimental data according to the vibratory roller experiment. Then the system response characteristic of nonlinear vibration roller is obtained, and the availability of system model is checked. All above provide the valuable theoretical basis for the research of vibrating compacting.
Numerical Simulation of Lobed Exhaust Ejector
Authors: Wang Zhong Yi , Chu Shu Guang , Yu Yun Liang , Sun Tao
Published: October 2011

Exhaust ejectors are good ventilations and cooling equipments. By the method of numerical simulation, researches on cylindrical exhaust ejector, lobed exhaust ejector and lobed exhaust ejector with twisted blades are conducted in this paper to study the effects of different ejector structures on flow field uniformity. The results show that: lobe structure can well improve the velocity field uniformity and temperature uniformity field of the ejector; meanwhile it can also ensure that there is no obvious change of the ejector coefficient, but the total pressure loss is larger; while the flow field of lobed exhaust ejector with twisted blades possesses more uniformity.
On the ESD EMP Effect and Strengthening Technology of SCMs
Authors: Yang Shi Liang , Wang Wei Kui , Zhang Xin Hui , Liu Yun , Wei Yan
Published: October 2011

In order to study the interference and destructive effects of electromagnetic pulse for electronic systems, a test was done for an SCM system to check the irradiation effect of ESD EMP for it. According to the result of the test, under the effect of ESD EMP, the SCM would suffer multiple kinds of faults. This paper mainly introduces an exterior RAM effect test done for an SCM and the corresponding measures taken on the basis.
Research for NC Milling Error Analysis and Compensation
Authors: Sui Xiu Lin , Zhao Ping , Wang Ya Ping
Published: October 2011

Aiming at NC milling processing error problem, ball-end milling cutter is taken as researching object, its the stressed deformation, heated deformation, tool wear and workpieces’ heated deformation are modeled. The milling comprehensive error at all coordinate directions are obtained with superposition method. Corresponding error prediction and compensation scheme are put forward, and milling error models are tested and verified through experiments, thus to make try cutting cost reduce and processing efficiency improve, to lay the foundation for NC milling machining simulation system improvement.
Study on Agricultural Products Logistics Operational Pattern Based on Information Share
Authors: Xu Guang Yin , Qu Jian Hua , Wu Rui Juan , Qin Wei Feng
Published: October 2011

By analyzing the typical operational pattern of agricultural products logistics, the agricultural products logistics operational pattern based on information share was built. The pattern was demonstrated by the watermelon logistics operational pattern based on information share. The result showed that the pattern was effective and practicable.
The Effect of Pressure on Burnthrough Susceptibility during in-Service Welding
Authors: Liu Wei , Tao Han , Li Chao Wen , Guo Guang Fei , Gu Guo Lin
Published: October 2011

3D finite element models have been developed for X70 pipelines during the in-service welding. These models have been used to analyze the effects of internal pressure on the susceptibility of burnthrough. The work has showed that radial deflection could be regarded as a burnthrough limit. The same internal pressure has more important effect on the thinner materials and bigger diameter pipes. Internal pressure also has a great impact on the temperature profiles and the thermal cycle of inside surface. For thinner materials, Battelle’s 982°C temperature limit is overly conservative.
The Exploration of Innovation of Mould Lesson in Vocational College
Authors: Sun Xiao , Xu Li Jun
Published: October 2011

The essay analysizes existing typical problems in current teaching of Molding Design, and raises a set of teaching innovation to meet practical needs. In the change, the author strengthens the process and guidance for molding, which obviously triggers students’ interests in study. By the innovation, we get satisfactory results.
Thermo-Mechanical Simulation of Hot Stamping Tools Design
Authors: Cai Yu Jun , Halim Felix Stephanus , Li Guo He , Wang Yu Guang
Published: October 2011

Hot stamping is a process which simultaneously forms and quenches the hot blanks at the austenization temperature (900-1200 °C) to produce full martensitic Ultra High Strength (UHS) steel structure. Automobile manufacturers use hot stamping to produce many car frame components which can decrease the total weight of the car and increase the car safety. The aim of this paper is to simulate the thermo-mechanical process of the hot stamping which consists of FEA simulations by using Abaqus/Explicit. The process includes too steps: heating of the blank to 900°C, and simultaneous punching and quenching process to increase the tensile strength of the material. The objectives of the FEA simulation are to obtain thermo-mechanical properties of the material and to predict strength of the steel as the product of hot stamping. The results of this simulation will be the values of maximum Von Mises stress and nodal temperature of the blank, the punch reaction force, and also the prediction of the yield strength and tensile strength of the material which will be compared to the yield strength and tensile strength of the available steel alloy data.
Trust-Aware Information Dissemination in Social Network
Authors: Zhang Bo , Xiang Yang
Published: October 2011

Information dissemination security is a crucial factor for social network interaction. In this paper, we present a trust-aware information dissemination algorithm for social network in order to make the nodes transmitting more trustable information. Firstly, we propose information trust computation from two aspects: entity trust of information and source trust. Two above aspects can be integrated into whole trust of information. Likewise, we propose the trust relationship comutation method among nodes. Further, we present a multiple paths trust computation method (MPTC) for information dissmination in social network. Then, we address the trust-aware information dissemination algorithm (TIDA) based on above trust computaiton. Finally, our experiments show that TIDA is a feasible and effective solution for social network information dissemination.
Cloud Manufacturing Resource Access System Based on Internet of Things
Authors: Xiang Feng , Hu Ye Fa
Published: October 2011

The cloud manufacturing (CloudM) resource access solution of Internet of Things (IOT) application was discussed. According to resource access requirements, a kind of CloudM resource access architecture based on IOT was described, as well as several key technologies in the architecture. Several key issues such as classification of resource information accesses, access processes were studied. Related explanations about QoS information expanding, manufacturing capacity information constructing, EPC information collection were illustrated. With magnetic bearing as an example, its conceptual information model and QoS expanded information described by PML were given.
A Simulation Approach to Improve Forming Limitation of Truss Core Panel
Authors: Xia Zhi Zhen , Zhao Xi Lu , Hagiwara Ichiro
Published: October 2011

New structure patterns of metal panel are used in modern life such as Truss Core Panel (TCP). It is used as flooring or wall material in train, car, aircraft, and buildings etc. at present. Beyond the traditional material, the new patterns have lighter weight and harder stiffness. However, in general, there are difficulties in forming truss core panel, which should be getting forming limit and developed. In this paper, firstly forming limitation is discussed for tetrahedral truss core. Secondly improved hotforming simulation was set for improvement.
An Integrated Analysis Methodology Based on Incidence Matrix of Maintainability and Maintenance Tasks
Authors: Zhou Dong , Kang Le , Guo Zhi Qi , Wang Mei Hui
Published: October 2011

A integrated analysis methodology(IAM) based on incidence matrix is presented in the paper, aiming at the independent and imbalance between maintainability analysis (MA) and maintenance task analysis (MTA) in practical projects. This paper presents correlativity between support resources and maintenance task, support resources and maintainability factors, maintainability and maintenance task to achieve the process oriented integrated analysis based on incidence matrix, which can expose design defects effectively. Besides, the methodology puts forwards the compositive measures for design improvement through screening key problems and common problems from analysis results. A simple case study is used to demonstrate how the methodology is more effective than usual.
Characteristic and Equilibrium Studies of Fungi Penicillium sp. QQ Biosorption Bacteria Exiguobacterium sp. TL
Authors: Yan Bin , Zhou Ji Ti , Liao Wen Chao , Li Dai Lin , Xu Su
Published: October 2011

This study aimed at investigating the characteristics and equilibrium of Penicillium sp. QQ biosorption bacteria Exiguobacterium sp. TL. The optimal biosorption conditions were as follows: 50 mM Fe3+, 2.50 g of strain QQ, 480.80 mg/L of strain TL, 120 min of contact time, pH 5 and 40oC. The biosorption isotherms of strain TL by strain QQ could be well described by both Langmuir and Freundlich models. The maximal biosorption capacity of strain QQ for TL was 62.62 (mg/g) at 40oC, evaluated by Langmuir isotherm. It could be concluded from the results that the strain QQ was a promising biological carrier for the biosoption of strain TL, and the establishing of fungi-bacteria biosorption system was potential for pollutant removal and field application.
Analysis on Spindle of 2MW Wind Generator
Authors: Zheng Jia Hong , Li Min
Published: October 2011

The model of the spindle was made while the related characteristics and parameters were analysising,and then it was inducted in ANSYS finite element analysis software. Through carrying the constraint on the finite element model, the spindle was completed to realize the finite element analysis. At last, the model was inducted in MATLAB to establish the optimal model, through the mathematical model ,it was realised to complete optimization analysis.
Persulfate Oxidation Activated by Peroxide with and without Iron for Remediation of Soil Contaminated by Heavy Fuel Oil: Laboratory and Pilot-Scale Demonstrations
Authors: Fang Shyang Chyuan , Lo Shang Lien
Published: October 2011

The main objective of this study was to evaluate and optimize the chemical oxidation process to be implemented at a power plant in Penghu County, Taiwan through laboratory and pilot-scale experiments were used to evaluate and optimize the chemical oxidation process at a power plant in Penghu County, Taiwan. Prior to pilot test, bench-scale tests were performed in the laboratory and analytical results indicated that persulfate oxidation achieved 90% removal of fuel oil while Fenton-like oxidation achieved only 41% removal of fuel oil within three days of testing period. Persulfate oxidation coupled with Fenton-like reaction was then used in a pilot test to treat the contaminated soil onsite. The Fenton-like reaction served the first stage of oxidation which formed hydroxyl radicals to break down fuel oil. The excess heat and ferrous ions resulted from such oxidation process would then activate persulfate oxidation which, in turn, produced sulfate radicals for continual brake-down of fuel oil. Result of soil pilot test indicated that the concentration of fuel oil was reduced to below the regulated standard in less than a week. Because the treated soil was originated from the local basaltic basement rock, it is rich in heavy metals, by nature. As such, the heavy metals as nickel and chromium were detected in leachate collected from the treatment cells, at concentrations exceeding the Taiwan Contaminant Control Standard and would have posed secondary contamination to the ambient environment if in-situ soil persulfate oxidation was implemented. Therefore, the result of this case study provides an alert that implementation of in-situ persulfate oxidation for soil and groundwater treatment could pose a threat of secondary contamination of heavy metals to the ambient environment.
Optimization for the Specification of a New Type of Optical Disk Concerning about its Tracking Signal
Authors: Cheng Xue Min , Wang De Xi , Hao Qun , Hou Xin Nan , Ma Jian She
Published: October 2011

15GB optical disk, or Next Generation Versatile Disk (NVD), is a new type of disk handling the high definition video in China. In this paper, its specifications are optimized for commercialize concerning about the tracking signal. Then a new specification with robust tracking signal and reasonable pit/track ratio is proposed for NVD.
Application Research of Kalman Filter and SVM Applied to Condition Monitoring and Fault Diagnosis
Authors: Li Ke , Zhang Yue Lei , Li Zhi Xiong
Published: October 2011

In the condition monitoring and fault diagnosis, useful information about the incipient fault features in the measured signal is always corrupted by noise. Fortunately, the Kalman filtering technique can filter the noise effectively, and the impending system fault can be revealed to prevent the system from malfunction. This paper has discussed recent progress of the Kalman filters for the condition monitoring and fault diagnosis. A case study on the rolling bearing condition monitoring and fault diagnosis using Kalman filter and support vector machine (SVM) has been presented. The analysis result showed that the integration of the Kalman filter and SVM was feasible and reliable for the rolling bearing condition monitoring and fault diagnosis and the fault detection rate was over 96.5%.
Influential Factors of SHS-Densification Methods of Solidified Nuclear Waste in SrTiO3 Synroc
Authors: Zhang Rui Zhu , Li Quan Cai , Wu Jin Mei , Li Lu Ke
Published: October 2011

Through self-propagation high–temperature synthesis (SHS), SrTiO3 in which Sr2+ had been included was solidified. The actors permitted to the solid dendification were analyzed by experimentation. Optimal process parameters were obtained for preparing SrTiO3 and composites, including 56% of density of preform, 10 MPa of pre-pressure P1, 4 s of pressing time t1; 300 MPa of high pressure P2 and 8 s of dwell time t2 at high pressure period.