bluuebunny/crossref_metadata_2025 huggingface dataset:
L'impératif écologique
Authors: Bourg Dominique
Published: October 2012

La question environnementale a changé : il ne s’agit plus de s’inquiéter des impacts d’une série de pollutions localisables ou isolables, c’est désormais l’intensité des prélèvements de matières et d’énergie qui est excessive et touche aux limites de la biosphère. Mais prendre en compte la limitation nécessaire de nos activités touche désormais au coeur même du fonctionnement de nos sociétés.
Changer les comportements : une utopie ?
Authors: Zaccai Edwin , Mongin Olivier , Padis Marc-Olivier
Published: October 2012

Quelle peut être la contribution du consommateur à l’effort collectif pour limiter les dégâts que nous provoquons sur la nature ? Le volet de la consommation « responsable » n’est pas dissociable de politiques structurelles orientant la production elle-même par des normes plus strictes ou mieux pensées. Entre indifférence, culpabilité et désir de pureté, l’individu est-il voué à l’impuissance ?
Study on the Application of Puffing Glutinous Rice Starch
Authors: Zhai Guang Yu , Qu Wen Tao , Zhu Wei
Published: October 2012

The puffing glutinous rice starch (PGRS) could be obtained by adding glutinous broken rice into bulking machine and expanding at a certain temperature and pressure. Compared with gelatinization by heating and adding alkali, gelatinization by puffing was easier to control and had a higher degree of starch gelation. The starch granule disintegrated after puffing and therefore more hydrophilic hydroxyls were exposed. The water-solubility of PGRS was increased which was shown in IR spectrometry with a broad and strengthened peak of O-H stretching vibration. Scanning electron micrograph (SEM) found that the PGRS granules were in shape of rough surface, which would be a strong affinity for water. Therefore, it could be used to prepare corrugated cardboard case adhesive, stamp envelope adhesive, wallpaper adhesive and dry mortar internal wall paint.
Experimental Investigation of Flexure Properties for High-Strength Corrugated Composite Paperboard
Authors: Wen Shi Bao
Published: October 2012

In order to investigate flexure properties of high-strength corrugated composite paperboard(HCCP), applying the method of flexure property test for sandwich structure, four kinds of thickness paperboard –10,15,20 and 30mm– were tested according to longitudinal and transverse direction respectively, then the curve of flexure load – deflection was analyzed, the paper focused on the relationship between flexure yield load, flexure strength of face sheet, shear strength of core and thickness and direction of paperboard. The investigation has a strong significance for HCCP’s application in practice.
Fabrication of a Super-Hydrophobic Micro-Nanoporous Aluminum Surface by Anodic Oxidation
Authors: Wu Ruo Mei , Liang Shu Quan , Chen Hong , Pan An Qiang , Jiang Hai Yun , Deng Jing , Yu Ya , Yuan Zhi Qing , Liu Qi Long
Published: October 2012

A novel and stable super-hydrophobic film was prepared by stearic acid (C18H36O2), which was chemically adsorbed onto the anodized aluminum surface. The maximum static water contact angle (WCA) of the super-hydrophobic surface was 157.5º ± 2.0º and the contact angle hysteresis was less than 3º. The superhydrophobic property is attributed to the micro-nanoporous surface morphology and stearic acid. The pore size on the surface of anodic aluminum oxide is an important factor for controlling the superhydrophobic adhesiveness. The superhydrophobic surface is a factor to reduce device-associated infection and can be used in metal packaging practice.
Study on Identification Method and Property for Packaging Plastic Materials
Authors: Huang Xiu Ling , Ding Ya Feng , Pasbrig Erwin , Wang Zhi Wei , Li Mei Hong
Published: October 2012

Plastic packaging is an indispensable element in the packaging industry. The identification of plastic component can provide important information for industry and inspection and quarantine departments. However, the development of plastic processing technology brings more difficulties and challenges to the identification. Identification methods of non-instrument are put forward in the paper. Density, halogen testing, solubility and burning test are investigated to learn some physical properties and get detailed features. Among, different liquids combination used for density, solubility of plastic in different solution, flame colour and smell of smoke during burning test are given. These can help to promote research and development, ensure export safety, ect.
Prediction of Bending Creep Behavior of Rice Hull Flour/Polypropylene Composite
Authors: Xu Zhao Yang , Li Da Gang , Wu Yan
Published: October 2012

The creep behaviors of rice hull flour/PP composite under different stress levels were studied through bending test. The results show that the bending creep behaviors of rice hull flour/PP composite have obviously correlation to the stress levels. Based on the time-temperature-stress equivalence principle and 15% stress level as a reference, the creep compliance master curve of 15% stress level was constructed by horizontally shift the creep compliance curve of other stress levels, which can predict the creep behavior of rice hull flour/PP composite at the 15% stress level.
Theory Model for Ameliorative Airbag Based on Precision Airdrop
Authors: Li Liang Chun , Huang Gang
Published: October 2012

Analyzed the ameliorative landing cushion airbag’s structure and cushion theory based on precision airdrop. Built its physics model and mathematics model using thermodynamics and engineering mechanics methods. Established the correlativity of the structural parameters. And then, validate the cushioning effect of the ameliorative airbag by computing the example. Summarized the analyzing and computing theories which to reduce the acceleration peak-value by ameliorating the structure of airbag, which offered a new route and theoretical basis for improving the precision airdrop security of dangerous and frangible goods.
Preparation of Silica Hollow Spheres Used as Filler for Paper
Authors: Gu Wen Juan , Li Ying , Zhang Xiao Hui
Published: October 2012

Silica of hollow structure exhibits a number of special characteristic. In this paper, a new way to prepare hollow silica spheres which can be used as filler for paper was reported. In this approach, when silica shells were coated on polyvinylacetate (PVAc) template particles by the sol-gel method, the PVAc cores would be dissolved synchronously, forming hollow spheres. Neither additional dissolution nor a calcination process was needed to remove the PVAc cores. The morphology of the hollow silica spheres was also characterized by TEM. It was shown that the hollow silica spheres with 130-400nm in diameter and 15-35nm in the shell thickness could be synthesized. The possible formation mechanism was also brought forward. The possibility and potential advantages in usage as filler for paper were analyzed theoretically. We confer that this filler can improve the printability of the paper, and reduce its density compared with traditional fillers.
Effects of Processing Temperature on the Mechanical Properties of Calcium Carbonate-Plastic Composite Packaging Materials
Authors: Wang Zhao Xia , Xu Wen Cai , Gao De
Published: October 2012

The basic parameters of calcium carbonate-plastic composite packaging materials, such as tensile strength and flexural strength, were obtained by means of mechanical properties test at different temperatures. Through the experimental tests, the best processing temperature was determined at 190°C and the test data were fitted and optimized. Also, the residual of fitting curves was calculated by using the mathematical analysis software of MATLAB. Besides, mathematical models were established between temperatures and target parameters, from which the mechanical properties of materials at any other temperatures can be predicted theoretically. So, it provides a scientific basis for the regulation of processing temperatures.
Preparation and Property Characterization of Chitosan/Microcrystalline Cellulose Antimicrobial Preservative Films
Authors: Ren Dan , Fang Jian , Liu Ping , Sun Xiao , Zhang Rui Han
Published: October 2012

The preparation of chitosan (CTS)/microcrystalline cellulose (MCC) antimicrobial preservative film was optimized by Quadratic Rotation Combinative Design. The composite film structure was characterized by FT-IR, SEM and TG. Results showed that the optimum parameters of film formation were when chitosan solution concentration was 1.8g/100ml, MCC addition amount was 4.5g/100ml, and glycerin addition amount was 1.6g/100ml. Under this condition, the TS and elongation (E) at break of the composite film were 16.58 MPa and 17.3% respectively. Under room temperature, cherry tomatoes packed by chitosan/MCC antimicrobial preservative film (CTS-Fh) shrunk partially after 10 days, while placed under natural circumstances almost all cherry tomatoes shrunk after 4 days. Meanwhile, the composite film had excellent antibacterial activity, and the antibacterial rate (AR) for Escherichia coli and Staphylococcus aureus could be as high as 99%. Therefore, the composite film has a promising developmental prospect in the fields of fresh fruits and vegetables antibacterial preservation, biodegradable packaging film and so on.
Research on the Penetration and Diffusing Dynamics of Inkjet Droplet in Paper Coating
Authors: Chen Qi Feng , Chen Guang Xue , Tang Bao Lin , Tai Jing Lei
Published: October 2012

The penetration and diffusion of ink droplet in paper coating have significant influence on the image quality in the inkjet imaging. The flight physical phenomenon of the ink droplet was researched and analyzed according to the hydrodynamic equations of multiphase flow discrete phase in this paper. Base on studying on the surface structure of paper coating, the mechanism of impact, penetration and diffusion between ink droplet and paper coating also was researched in this paper from the perspective of energy conversion in the imaging process. The proposed mathematical model consisted of the factors of hydrodynamic characteristics for ink droplet and the physical characteristics of paper coating, we could get the maximum diameter of ink droplet spreading in paper coating through solving the model and obtain viscous loss and energy consumption in penetration of ink droplet by experiment, and then calculated the average penetration depth of ink droplet.
Quality Evaluation of Strawberries Packed with Perforated Film
Authors: Shu Zu Ju , Liu Sheng Quan , Yuan Yan , Xia Ye Bao
Published: October 2012

Strawberries were stored in perforated film packages with different number and diameter of perforation for 5 days at 18°C simulating the ordinary logistics in Hefei. The non-perforated film packages were used as the control. Several quality parameters of strawberries were determined and analyzed everyday during storage. The principal component analysis was applied to the comprehensive assessment of strawberry quality. The results showed that suitable diameter and number of perforation could maintain strawberry quality. The comprehensive quality of strawberries packed in perforated film with 36 perforations of diameter 0.5mm was the best, followed by the ones packed in non-perforated film with internal atmosphere of low oxygen and high carbon dioxide concentration.
Comparison Studies on Modified Atmosphere Packaging of Post-Harvest Apple
Authors: Guo Yan Feng , Hou Qin Rui , Xu Wen Cai , Pan Song Nian
Published: October 2012

Modified atmosphere packaging, Transpiration, Weight loss, Apple Abstract. In the article the modified atmosphere packaging (MAP) of post-harvest apples are developed and evaluated. Firstly, the comparison package box with MAP and without package is developed and applied to make comparison experiments of post-harvest apples during storage of 30 days, 60 days and 90 days. Secondly, the influence of MAP on the transpiration of post-harvest apples is evaluated by comparison experimental studies, the respiration model and the change of water loss for post-harvest apples is analyzed. These results show that, within the initial storage of 20 days the change of water loss of apples with MAP or without package is approximate and almost linear. After 20 days of storage duration, the two cases of water loss have obvious difference, the water loss by transpiration for apples without package still shows linearity and maintain constant transpiration rate, yet the transpiration rate of apples with MAP would gradually decrease. In addition the transpiration of post-harvest apples with MAP can be effectively retarded at high relative humidity, and the post-harvest may maintain better quality and 90 days shelf life at storage condition of constant temperature 5°C and relative humidity 60%.
Design of Mobile Platform Based Food Sorting Robot
Authors: Zhang Tie Feng , Pang Ming , Yan Zu Gen , Ma Liang
Published: October 2012

A food sorting robot based on a mobile platform was developed. The design indexes, mechanical and control system structure was given. The workspace of the proposed robot was simulated. The experiments results of the position accuracy of the end of the robot proved that the developed food sorting robot based on the mobile platform is designed reasonably and can operation accurately.
Research on Elastic Modulus of Wooden Crates for Simulation
Authors: Shu Zu Ju , Liu Sheng Quan , Yuan Yan
Published: October 2012

The manufacturing process sheet can be output by the design of wooden crates based on Solid Edge. According to the process sheet, the sample crate was produced to obtain and process experimental data of stacking test. By applying inverse method combined with finite element method, the CAE model can be reconstructed quickly. Deflections of the wooden crate were computed by finite element analysis. By comparing deflections to experimental data, elastic modulus of the wooden crate can be adjusted to meet the requirements. The research on elastic modulus will lay the foundation for determining CAE model and structural design optimization of wooden crates.
Research on the Kinetics Model of Hazel Nut Quality
Authors: Wang He Teng
Published: October 2012

The time-course of lipid oxidation determined by peroxide value and acid value of hazel nut packed at different temperatures were evaluated, and the separate kinetic models of peroxide value and acid value with respect to storage time at different storage temperatures were established based on Arrhenius equation, so as to predict and control the quality of hazel nut during storage. The result show that the peroxide value and acid value of hazelnut increased with the storage time prolonged, besides, it will increase rapidly with the storage temperature increased. The Acid value and peroxide value has a high fitting precision with the chemical reaction model and the Arrhenius equation.
Research on Different Structures of Folding Carton and Loading Weight
Authors: Jiang Dong Sheng , Fu Chun Ying
Published: October 2012

This paper studies a relationship of different structures of folding carton and the weight of contents. It can analyze the relationship of structures and weight by studying the difference from package design. By dropping a series of cartons at different heights and pressing a series of cartons at different pressure, this experiment can gain some important data of destroying these cartons. These data from the experiment can provide a reference for transport package, and more economical and more reliable of folding cartons can be choose by package designers.
Research on Standardized Design Method of the Size of Corrugated Box
Authors: Zheng Xuan , Cao Guo Rong
Published: October 2012

Based on standard pallet sizes, paper puts forward the calculation method of corrugated box which is fit for the the standard pallet sizes. This method can improve the utilization rate of pallet area, reduce logistics costs, promote the widespread using of standard pallet, and have realistic meanings to establish pallet exchange system.
Problem of Joint Size Design of Tube Type Folding Packaging
Authors: Zhang Yan Mei , Sun Cheng , Huang Li Qiang
Published: October 2012

The forming methods of tube carton or box have three kinds. This paper mainly analyzes the noticed points of the design on the edge of the joint size of box from gluing and nail. The edge of the joints size of adhesive paper box should be corresponding less 0.5~1.5 cardboard thickness, and the nail rated-locking carton should be more 0.5 cardboard thickness compared with the opposite of the carton.
Research and Development of Box/Carton CAD System Based on AutoLISP Language
Authors: Li Guo Zhi , Gao Jian Li , Li Wen Feng , Chen Man Ru
Published: October 2012

By using AutoLISP language based on Autocad, the development process of the tray /carton CAD system should focus on software workflow and overall development program. The system uses nodes descript by a relatively polar coordinate, parametric design, the combination of box/carton-type library with box/carton components library, splicing design methods, etc. With the program designed by AutoLISP language, paper box/carton structure parametric drawing can be achieved according to the mathematical model. The system has the input data legality verification, error handling function, output expansion plan, and automatic dimensioning features.
Chromatic Adaptation Transforms to Accommodate Printed Color Matching in Paper with Optical Brightening Agents (OBA)
Authors: Tian Quan Hui , Liu Zhen
Published: October 2012

The color reproduction is based on visual perception. The psychophysics experiments present the light source; illuminants and view background affect the results of color matching. Paper is a typical substrate for printed color matching and effects printed color greatly. Now almost all of print papers contain optical brightening agents, which changes significantly the color appearance of printed color and makes color shifting of printed color matching. This paper used CAT02 chromatic adaptation models to transform the measurements of printed color in paper with and without OBA, compared the effect of printed color matching between before and after transforming with display, present the method using chromatic adaptation transforms to improve the accurate of printed color matching.
Frequency Characteristics Analysis of Simulated Horizontal and Vertical Motion Blurred Image
Authors: Song Yue Hong , Wang Peng Fei
Published: October 2012

This paper based on the degradation model of the blurred image by uniform rectilinear motion, simulated horizontal and vertical motion blurred images. The Fourier transform method was employed to analyze the frequency characteristics of blurred images. The simulation test result shows that ideally via the frequency characteristics of the blurred images, we can obtain the motion parameter, including distance and direction. These can be of great useful for image restoration of many blurring circumstances such as camera and printing images.
Experimental Study for the Influencing Factors of Electrograining Quality of PS Plate
Authors: Ma Yi Wen
Published: October 2012

Aiming at quality control of grain of PS plate，the orthogonal experiments on electrolyte concentration, current density, electrolysis temperature and time in the process of electrograining have done by surface roughometer, metalloscope, etc. Experimental results indicate that the electrolyte concentration has great influence on the amplitude parameters of surface roughness, the other factors influence the amplitude parameters and the spacing parameters significantly; the interactions of current density with electrolyte concentration or electrolysis time have not significance.
Research on Mechanical Properties of Integrated Handle Structure
Authors: Xiao Ying Zhe , Hao Xi Hai
Published: October 2012

Varies of existing handle shapes are discussed in this paper. In condition of comfortable, we made load-bearing and tearing strength tests on handles of different shapes, and summarized the experimental results to perform a scientific design of handles.
Experiment and Simulation on the Flexural Properties of Fiber-Paper Honeycomb Sandwich Structure Compound Panel
Authors: Yang Xiao Jun , Lan Qing Shan , Zhong Yu Ning , Zeng Li Xia
Published: October 2012

Two equivalent models based on sandwich panel theory and equivalent panel theory were discussed in this paper. By analyzing the performance of fiber - paper honeycomb sandwich structure compound panel by bending load, the computational results are in accordance with test and Engineering software ANSYS. Therefore, it shows that the finite element equivalent models are reasonable and practical for the optimization design of fiber - paper honeycomb sandwich composites.
Construction of Die and Mould Technology Innovation Chain Based on Resource Tree
Authors: Tu Jian Fei
Published: October 2012

Die and mould technology innovation chain is a chained enterprise cluster which crossing many related links of die and mould technology innovation, and chained innovation is an important method to promote die and mould enterprises’ technology innovation development. Adopting resource tree tool, this paper analyzes die and mould technology innovation’s resource requirements, proposes the construction method of die and mould technology innovation chain, and illustrates an example of one electric tool base’s innovation chain.
Die and Mould Technology Transfer in the Environment of Industrial Cluster
Authors: Tu Jian Fei
Published: October 2012

In the field of the technology intensive die and mould industry, technological capacity is the significant factor related to die and mould enterprises’ competition level. Industrial cluster development of die and mould industry has contributed various changes to die and mould enterprises’ innovative technology development, including diversity of technology transfer type, increased success rate of technology transfer, etc. This paper deeply analyzes these changes’ impacts on die and mould technology transfer, and demonstrates that die and mould enterprises can effectively develop technology transfer in the industrial cluster environment.
Mechanism Research on Multi-Wedge Synchrostep Rolling Asymmetric Shaft-Parts by Cross-Wedge Rolling
Authors: Chen Le Ping , Shu Xue Dao , Peng Wen Fei , Sun Bao Shou
Published: October 2012

Because most of the asymmetric shaft-parts have relatively large size in the axial direction, single-wedge cross-wedge rolling (CWR) exposes many imperfections, such as the huge roller, higher cost etc. The paper adopted finite element method (FEM) to simulate multi-wedge synchrostep CWR (MS-CWR) based on the typical asymmetric shaft-part, and gained its distribution and characteristics of stress and strain. In the knifing stage, the deformation of work piece only emerges on the local region, but in the stretching stage, most of regions are observed the deformation except two ends of the billet and the transition position between inner and outer wedge of multi-wedges. The results offer theoretical basis for promoting and applying MS-CWR technology on asymmetric shaft-parts.
Machining Efficiency Model Based on the Multiple Regression Theory in Turning Glass Ceramics
Authors: Ma Lian Jie , Yu Ai Bing , Gong Ya Dong
Published: October 2012

The materials removal rate (V/VB) was selected to be objective function. It is comprehensive parameter about materials and tools wear. Through turning glass ceramics experimentation, the materials removal influence of cutting speed, cutting depth and feed speed were study. Based on least square method, the multiple regression prediction model of materials removal rate was built. And the model was tested. It was applied to predictive and control. The results indicated: this model was well to express materials removal law in turning glass ceramics. The multiple regression prediction model is high remarkable. The prediction value was coincident with measure value. This model is high reliability. So, expect materials removal rate can been obtained by this model, and choosing the technological parameter can been guided.
Research on Welding Technology of the Belt Conveyor Roller
Authors: Chen Hong Wei , Wang Rong Jie
Published: October 2012

In view of the fracturing occurred at the welded joint of the belt conveyor roller while being in use in a coal mine of Fujian Province, the paper analyses the roller’s structure and stress in the basis of the transmission principle. It explores the reasons of the fracturing problem, and then proposes method to improve the roller’s welding technology. These are the cause of the roller fracturing，which the tension of the belt is great, and the roller itself is not strong enough, and welding process of steel plate is poor, and welding quality is not high. Use CO2 and Ar mixed gas shielded arc welding to do backing weld, then use the welding method of automatic submerged arc welding. Finally the tempering to the welded joint part with the track-type far-infrared heater eliminate the welding residual stress. By actual use, it’s proved that the Welding Process Improvement is feasible, reasonable, reliable and practical.
Study on the Cavity Defects of Low-Pressure Lost Foam Casting for Magnesium Alloy
Authors: Li Ji Qiang , Zhao Zhong , Jia Zhi Xin , Xu Yun Wei , Liu Zhi Yuan
Published: October 2012

Cavity defects of low-pressure lost foam casting (LP-LFC) for magnesium alloy were investigated by using ladder samples and claviform samples.The physical feature of typical cavity defects of LP-LFC for magnesium castings had been tested by optical microscopy and scanning electron microscopy. And the chemical constitution of cavity surface was also tseted by energy spectrometer. The result indicated that the cluster cavity defects were formed with the application of higher vacuum at the metal-mold interface, which caused the liquid-EPS residue in the castings. Some irregular shape cavity defects were caused by slag entrapment or coating slough. These cavity defects could be avoided through reducing pouring temperature, filling velocity and vacuum level, improving the permeability of coating.
The Design and Application of NC Macro Programs
Authors: Jia Yu Jing , Cheng Guang Zhen
Published: October 2012

This paper describes a method about curves interpolation. Linear interpolation and circular interpolation feature is often used in the NC system, however, the processing of complex curves have not correspondence interpolation instructions, but most of the NC system have function feature to achieve the processing of the complex curves. Here analyze how to establish the parameters equation of the cam profile, and how to compilate the corresponding processing programs with the function feature of NC system. Point out using the numerical control system's function may complete all kind of curve interpolation, that the curve has the definite functional relations. The establishment equation is the key using linear interpolation command G01 to realize curve processing. Using Variable function of the numerical control system to prepare CNC machining macro program, the programming is very convenient.
Research on the Characteristic Description and the Numerical Model of 4G15-6L Automotive Engine
Authors: Zhang Lei , Chen Yan , Yang Xiu Min , Zhou Chun Yang , Zhang Wen Jia
Published: October 2012

This article mainly discussed the establishing process of the 4G15-6L automotive engine simulation model. The numerical model was set up for the engine using engine’s experimental data. Therefore the engine’s optimal economic and dynamic curves were drawn. According to the established mathematical model, the simulation experiment model can be built by Matlab or Simulink. The feasibility and reliability of the model were verified through the test, and the model met the requirements of hardware in loop simulation. Meanwhile, the model built the foundation of the engine’s simulation platform in the next step.
Design of a Control System for a Turret Based Test Handler
Authors: Zhang Zhi Sheng , He Fan
Published: October 2012

Final testing procedures are performed to assure the quality of manufactured parts before their shipping to customers. Turret based test handler is a general kind of IC Test Handler for final testing. This paper discusses how to develop a general control system for a test handler of turret style in which every workstation moves up and down separately based on an industrial control computer. The combination of object-oriented programming and the cycling scanning working mode is the key of the whole system. To achieve ideal performance, special control flags are designed as an efficient way for making all the workstations work as setting orders stably. The method to developing the control system in this paper can be also applied to similar systems, which would greatly reduce development cycles. A turret based test handler with this control system has passed the test of a semiconductor factory and operates well in actual production.
The Spiral Collection-Scraper Conveyor Loader
Authors: Zhu Xin Zhong , Zheng Yun Ting , Cheng Guang Zhen
Published: October 2012

This article is intended to provide a mobile loader, it is consist of spiral drum collecting device, chain transmission device, rotary table, expansion bend and mobile platform vehicle. design the rotary table which can rotate about a fixed axis relative to the mobile platform vehicle in the horizontal plane, and the expansion bend which can rotate about a fixed axis relative to the rotary table in the vertical plane, Combined with electrical control system and to realize the function requirements of the loader, it mainly used for coal mine underground sump cleaning, and focus on the structure, working principle and process of the spiral collection-scraper loader, point out the applicable working conditions and main features of the machine.
Electromagnetic Tube Compression: A Novel Experimental Technique and Finite Element Simulation
Authors: Li Lai Ze , Dong Xin Long , Zhou Gang Yi
Published: October 2012

The dynamic electromagnetic compression technique of metal tube which can be used for study of collapse with cylindrical symmetry like the thick-walled cylinder (TWC) technique is introduced. 3D simulations by multiphysics ANSYS finite element code are used for metal tube compression, and the magnetic flux density, displacement, and strain in process are obtained. The influence of the sizes of the tube is considered in the tube compression. The finite element analysis results show that the specimen which has small height or thinner thickness is easier to compress than the big one. The study can offer valuable information about the process analysis of metal tube electromagnetic compression and specimen design.
Development of the Smoothed Natural Neighbor Petrov-Galerkin Method
Authors: Wang Kai , Zhou Shen Jie , Nie Zhi Feng
Published: October 2012

The strain smoothing technique is employed in the natural neighbor Petrov-Galerkin method (NNPG), and the so-called smoothed natural neighbor Petrov-Galerkin method is proposed and studied. This method inherits the advantages of the generalized MLPG method and possesses the easy imposition of essential boundary condition and the domain integration is completely avoided. In comparison with the traditional NNPG, the smoothed natural neighbor Petrov-Galerkin method can obtained more stable and accurate result without increasing the computational cost.
Dimension Error Analysis and Simulation of Sheet Metal Multistage Assemblies
Authors: Yu De Zhong , Xu Xiang Hong
Published: October 2012

The dimension quality of sheet metal subassembly（SMS）, which is usually assembled in the multistage process, has serious effect on its performance. Based on the multistage transmitting model of dimension errors of SMS, this paper detailedly analyzed the dimension errors of SMS in locating phase, over-locating phase and springback phase, and also simulated their dimension errors by Matlab and FEM, and finally predicted the assembly dimension errors of aeroplane wainscot subassembly sample.
Improved Design of 2-DOF Micro-Positional Stage Based on Parallel Structure with Flexible Sheet
Authors: Zheng Shao Yong , Cui Yu Guo , Fang Fan
Published: October 2012

In order to obtain good static and dynamic characteristics of the 2-DOF micro-positional stage, improved design of developed stage were done. First, the part of displacement coupling for the stage was improved, which making the stage only have linear displacement at driving direction; Second, in order to acquire the highest natural frequency under the condition of given output displacement, micro-positional stage was designed by using the size optimization method. Finally, the static and dynamic characteristics of the stage were analyzed by the finite element software ANSYS. The finite element results show that: the stage completely eliminates the displacement coupling after improving design; under the condition of given 30 μm output displacement, natural frequency reaches 1.86 kHz.
Calculation on Rotation Stiffness of Asymmetrical Right Circular Flexure Hinge
Authors: Shen Jian Ying
Published: October 2012

Flexure hinge has been widely used in high precision micro-positioning mechanism and the most common type is right circular flexure hinge. Firstly, asymmetrical right circular flexure hinge is presented and the structure factor is introduced in the paper according to the size of the cutting arc radius of both sides of right circular flexure hinge. Then, asymmetrical right circular flexure hinge is classified by the value of structure factor. Finally, the analytical expression of rotation stiffness for asymmetrical right circular flexure hinge is deduced, and the relationships between the structure factor and rotation stiffness are calculated with Matlab software. The analytic result has an important significance to design flexure hinge.
The Influence of Pillow Material on Body Distribution and Sleeping Comfort in Supine Position
Authors: Shen Li Ming , Hou Jian Jun , Zhu Yu Ding , Song Jie
Published: October 2012

The material of pillow has influenced on body pressure distribution and human comfort. This paper studied the relationship between the characteristic of pillow materials and sleeping comfort in supine position through head, neck, back pressure distribution system and subjective evaluation on ergonomics methods. This paper selected chemical fiber, buckwheat, latex, memory foam, inflatable cushion, traditional Chinese medicine / tea and pearl cotton for experimental materials. The results showed that the pillows with memory foam and latex was better in pressure distribution and subjective evaluation. The pillow with traditional Chinese medicine / tea and inflatable cushion had lower elasticity and poorer sleeping comfort. The buckwheat pillow can relieve neck fatigue. This study results have important reference value to the material of pillow and comfort pillow design.
The Improvement of the Machining Accuracy by Factor Analysis Approach
Authors: Huang Zheng Hua , Jiang Cheng Rong
Published: October 2012

In machining, a complete machining process system consists of the machine tool, the fixture, the tool and the part together, the various errors are also inevitable. The factor analysis approach and the statistical analysis method were put forward to study the machining accuracy on the basis of the error sources analysis of the machining accuracy, and the measures were introduced to improve the machining accuracy by using the factor analysis approach. The change laws are grasped by the analysis of the machining errors, so as to take the appropriate measure to reduce the machining error and improve the machining accuracy.
Extraction of Characteristic Parameters of Keyhole during High Power Fiber Laser Welding
Authors: Liu Yong Hua , Gao Xiang Dong
Published: October 2012

During deep penetration laser welding, a keyhole is formed in the molten pool. The characteristics of keyhole are related to the welding quality and stability. Analyzing the characteristic parameters of a keyhole during high power fiber laser welding is one of effective measures to control the welding quality and improve the welding stability. This paper studies a fiber laser butt-joint welding of Type 304 austenitic stainless steel plate with a high power 10 kW continuous wave fiber laser, and an infrared sensitive high-speed video camera was used to capture the dynamic images of the molten pools. A combination filtering system with a filter length of 960-990nm in front of the vision sensor was used to obtain the near infrared image and eliminate other light disturbances. The width, the area, the leftmost point, the rightmost point, the upmost point and the bottommost point of a keyhole were defined as the keyhole characteristic parameters. By using the image preprocessing method, such as median filtering, Wiener filtering, threshold segmentation and Canny edge detection methods, the characteristic parameters of a keyhole were obtained. By analyzing the change of the keyhole characteristic parameters during welding process, it was found that these parameters could reflect the quality and stability of laser welding effectively.
An Investigation into the Characteristics of a New High-Frequency Electro-Hydraulic Flutter Device
Authors: Jin De Feng , Xing Tong , Fu Liang , Yang Yong Shuai
Published: October 2012

This paper presents a new structure of electro-hydraulic flutter device, taking into consideration the high frequency response and low inertia. A simulation model is established based on AMEsim and simulated the vibration of the flutter. The dynamic characteristics of the flutter device and the flow field in the chamber of the flutter are investigated by experiment. Basically the experimental results were in accord with the simulation results. The results show that the electro-hydraulic flutter device can get a high frequency vibration performance. The average chamber pressure of the flutter device is half of the system pressure without the exciting valve pressure drop.The amplitude is 4um in 1572Hz and 3um in 1853Hz.
A Driver Model for Direction Control in Intelligent Driving Based on Fuzzy Control
Authors: Chu Liang , Chen Jian , Wang Yan Bo
Published: October 2012

Driver model is the most essential part of intelligent driving system. In Driver-Vehicle- Environment system, a driver is a pre-condition, to correct pedal input and the steering wheel angle position in right time, which makes the vehicle drive in expected path. A new driver model is introduced. Firstly, a real-time algorithm based on dynamic parameters of vehicle body is proposed to estimate body posture in the next step moment. Secondly, vehicle’s posture is compared with the target trajectory to get a deviation quantity. And a correction value for angle at the steering wheel is obtained according to a driver model based on fuzzy gain modulated PID control, which is completed in Simulink workspace. Finally, driver model is verified by two typical driving maneuvers in simulation. And results show that the driver model achieves a good performance and suitability in different applications of Driver-Vehicle-Environment.
NINU: An Incremental User-Based Algorithm for Data Sparsity Recommender Systems
Authors: Zhang Yang , Shen Hua , Zhou Guo Shun
Published: October 2012

Collaborative Filtering (CF) algorithms are widely used in recommender systems to deal with information overload. However, with the rapid growth in the amount of information and the number of visitors to web sites in recent years, CF researchers are facing challenges with improving the quality of recommendations for users with sparse data and improving the scalability of the CF algorithms. To address these issues, an incremental user-based algorithm combined with item-based approach is proposed in this paper. By using N-nearest users and N-nearest items in the prediction generation, the algorithm requires an O(N) space for storing necessary similarities for the online prediction computation and at the same time gets improvement of scalability. The experiments suggest that the incremental user-based algorithm provides better quality than the best available classic Pearson correlation-based CF algorithms when the data set is sparse.
Winding Modeling and Driving Method of Varying Length Rope Based on ADAMS
Authors: Wang Jin Jie , Cao Guo Hua , Song Jing , Wu Rong Hua
Published: October 2012

It is necessary to study the dynamics and load-bearing characteristics of ropes in order to guarantee the stability and reliability of hoisting equipments. Based on ADAMS, a parametric coupling model of rope winded along cylindrical helix is built by force field. An optimized simulation method, cooperating fixed joints with angle sensors under the control of script, is recommended. Studying on the construction system of deep vertical shaft wall, the bucket is placed at static equilibrium position by preload defined in force field and dynamics behaviors of the center of mass in bucket are researched. The results indicate that the displacement curve is successive and complete, thus it confirms that the driving method is reasonable and feasible. This method could not only guarantee the accuracy and stability but also increase simulation efficiency, providing a new simulation approach for one kind of flexible body such as ropes and cables.
A Risk-Based Conceptual Design Method for Submarine Rescue Vehicle
Authors: Huang Xing Ling , Huang Xiang Bing
Published: October 2012

In order to reduce the risks and uncertainties in conceptual design of submarine rescue vehicle (SRV), the paper proposed a risk-based conceptual design method, which consisted of three focus areas: problem setup, risk assessment, risk mitigation and decision support. Conventional risk assessment tools (e.g. probability risk assessment) were not suited for initial design because of lack of data, and a safety analysis model using fuzzy-logic approach employing fuzzy IF-THEN rules was introduced to carry out risk analysis in conceptual design. Subsequently, it was investigated that the main risky factors which influenced system risk in initial design were technology level of SRV, safety of SRV, task complexity, investment and repayment. And then a risk analysis model for submarine rescue vehicle was introduced. Lastly a case was studied to demonstrate the application of the model, and the results showed that it was an effective way to reduce the risks and uncertainties in conceptual design process.
Secondary Developing and Structure Design of Steam Ejector in Parameterized Modelling
Authors: Liu Jie , Zhang He Ping
Published: October 2012

Parametric design has become effective means of the initial or dynamic design with its powerful sketch design and dimension driven function. When the structure of the steam injector is redesigned, its sizes would also change, but the topology information did not change, so steam injector may be parameterized drawing by dimension driven.In this paper, parametric thought of the size driving would be used in parts drawing of steam injector, and the parts drawings assembly method would be implemented in the generation of assembly drawings.
Failure Analysis of Plane Thrust Bearing of Oil Screw Press
Authors: Li Shi Long , Hu Zhi Gang
Published: October 2012

The service condition of plane thrust bearing of worm shaft in an oil screw press was analyzed. The fracture failure of the bearing rings was systematically investigated through physical-chemical test, trace inspection, fractographic appearance, and metallographic structure analysis. The results showed that a great amount of network surface cracks near bearing ring edge, some dot shaped internal oxidations and secondary crack initiation, higher hardness, as well as the network carbides and coarse quenching martensites led to the early brittle fracture of the bearing rings. The further improvements were normalizing and isothermal spheroidizing annealing can eliminate the network carbides and improve the microstructure in preheat treatment process, and quenching temperature and heating time can not be too high and long in final heat treatment. Hardness of the material is preferably 60-62 HRC.
Die-Casting Die Design Based on the Application of CAE Simulation
Authors: Jia Zhi Xin , Hu Ning Bo , Li Ji Qiang , Liu Li Jun , Chen Li Qiong
Published: October 2012

High pressure die casting is a high volume component manufacturing process which is used extensively in many aspects. There are many factors affecting the quality of die-casting die. In this paper, the CAE simulations of filling and solidification processes for die-casting are studied. Numerical analyses are presented for two practical die-casting parts using HZ CAE software. The temperature distributions and filling states in solidification and filling process are presented. Then the deficiencies of the part are predicted. Based on the analyzing results, the structures of the two dies are optimized and longer die service life and high-quality castings are obtained. It is proved that CAE simulation results can offer a helpful reference for die-casting die design.
Development of the Pattern Preparing System for Fully Automatic Flat Knitting Machine Which Based on Embedded Technology
Authors: Zhai Zhi Yong , Chang Min
Published: October 2012

A new controlling system of fully automatic flat machine based on embedded technology is introduced in the paper. The computer is replaced by a 32 bits micro-processor and its expansions in the system, it downloads data that has been handled by the pattern preparing system, then sends the data to corresponding address of chips, in this way knitting is implemented. As an important part of the controlling system, the pattern preparing system provides programming interface to the users, and handles the work information in the users’ file. Work information is saved in the computer which is used as the server. Functions of every block, structure of software and data structure adopt of the pattern preparing system are described in detail.
Design of Dynamic Tension Detection System of Multi-Hoisting Wire Rope
Authors: Jin Hua Wei , Zhang Xin
Published: October 2012

In order to solve the problem about the tension detection of the multi-hoisting wire rope, this paper designs dynamic tension detection system of the multi-hoisting wire rope. The system can real-time detect the tension of rope, alarm to overload, imbalance and other security hazards during the operation, and guarantee the safe operation of the elevator. This paper designs a tension sensor for the hoist wire rope. The sensor uses the strain gauge as the measurement principle and the spoke as the flexible structure. It has the advantages of large measuring range, small size, anti-interference etc. At the same time, this paper adopts configuration software as detection system software. The software system includes the show of the rope tension and its force diagram, the simulation of hoisting state, and the alarm function to security hazards etc. It realizes online detection of the tension.
Customization Research on Collaborative Simulation of the Parts of Truck-Mounted Crane
Authors: Ji Ai Min , Xu Zhong Hua , Lu Li Xia , Wang Yao Cheng
Published: October 2012

The base frame of the truck-mounted crane was taken for an example, the collaborative simulation process based on the Pro/E and ANSYS Workbench software was put forward. Firstly, the collaborative scheme based on Pro/E and ANSYS Workbench was made; secondly, the model parametric extraction and the two-way transmission path of parameters between Pro/E and ANSYS Workbench were studied. The interface technology of model’s data was discussed; thirdly, the key technology of the implementation of analytic model was discussed. With the ANSYS Workbench, customization development technology of the collaborative simulation process was studied. Based on the method of customized script components, the support platform of customizing simulation of the base frame was built, which includes part’s simulation menu customized by XML language; simulation procedure controlled by Jscript language; interactive interface and input interface of model parameters and load parameters realized by HTML language. Thus, the parametric modeling and analysis of truck-mounted crane’s key parts were implemented automatically. The customization of collaborative simulation process provides important reference for the customization development of product parts.