bluuebunny/crossref_metadata_2025 huggingface dataset:
Linear Rail Space Dynamic Scheduling Technology for Multi-Tasking Hybrid Assembly Sections
Authors: Lu Zhi Bing , Wang Ai Min , Tang Cheng Tong , Li Jing Sheng
Published: December 2012

For the rapid response to production scheduling problem driven by high-density production tasks, a dynamic scheduling technology for the large precision strip products assembly with a mixture of task time nodes and line-rail space is proposed. A scheduling constrained model containing coverage, proximity, timeliness and resource is established. A linear rail space production scheduling technology using heuristic automatic scheduling and event-driven method is put forward. The time rule based on delivery and single completion assembly is formed, at the same time the space rule based on the adjacent rail and comprehensive utilization is researched. Supposing the privilege of single product assembling as the core, the scheduling parts filter method based on multiple constraints and former rules. For the space layout problem, a clingy forward and backward algorithms is proposed to judge the assemble position regarding the space comprehensive utilization rate. The classification of the various disturbances in the actual production is summarized. Three basic algorithms are proposed, including insertion, moving and re-scheduling algorithm, in order to solve the assembly dynamic scheduling problem driven by production disturbance events. Finally, take rocket as the example， the rocket assembly space production scheduling system is developed, combining with the proposed algorithm. The practicability of the system is validated using real data.
Performance Prediction of Assembly Based on Dynamic Alignment
Authors: Wan Fei , Li Guo Xi , Rao Zhi Hua
Published: December 2012

To change the status of time-consuming and over-reliance on technicians in mechanical system alignment process, performance prediction based on dynamic alignment was proposed. The mapping relationship between alignment process parameters and machine dynamic characteristics was established. A large number of computational experiments are implemented by adjusting the value of process parameters in order to learn and anticipate experimental data and also find out the rules of process parameters on machine dynamic characteristics. The method can optimize the alignment process, guide technician alignment, modify the theory mapping, and improve the alignment efficiency.
Analysis of Glass Packing Materials in Packing Design
Authors: Li Xin Zhuo , Wang Fu Ting
Published: December 2012

In this modern time with rapidly developing science and technology, packing materials have taken an important role in packing design, and glass packing container takes a huger proportion all the time. Glass’s main raw materials include quartz sand, sodium carbonate, feldspar and limestone and so on. At times, a little bit clarifier, colorant, or opacifier will be blended into the glass. With the procedures of blending, melting, clarifying and homogenizing, the glass will be processed successfully after annealing treatment. Glass packing materials’ workmanship is simple with various forms, and they are apt to clean whilst can be used repeatedly. In modern packing design, glass packing materials have a higher utilization rate, so they have become a kind of indispensable packing materials.
A New Design Method of the Milling Machine Headstock Based on Frequency Converter Technology
Authors: Wu Tao
Published: December 2012

After discuss how to select frequency range and design speed diagram, a new kind of milling machine headstock is proposed in this paper. The design of the frequency converter is discussed as well. The hardware of frequency converter contains main circuit and control circuit. Main circuit includes rectifier and inverter. Control circuit is made up of single-chip microcomputer and specific integrated circuit. In the new kind of milling machine, the spindle box is simplified at the same time.
A Video Extensometer Design for The Tensile Strain Test of Fiber Optic Cable
Authors: Ning Sheng Ke , Chen Yan Yan , Ma Bao Ji
Published: December 2012

A strain measurement system for fiber optic is established based on digital image processing techniques. The hardware of the system is consists of a light source, optical fiber cable tensile equipment, CCD camera and image acquisition card. Hardware equipment was selected by the technical requirements of the system, such as measurement accuracy, velocity and so on. The software of the system, including image acquisition module, data processing module, edge detection module, image measurement module and image storage module, is designed.
Application of ANSYS in Grid Structure
Authors: Chen Hong Jiang , Wu Yue Hai
Published: December 2012

Space grid structure of modern large span structure engineering in the most commonly used structure form. This paper used ANSYS network space truss finite element analysis, discuss the element type, and the selection of material models, and the definition of the limit stress, when necessary, even considering the bar buckling state ( buckling ). Under various load (permanent loads, wind loads, seismic loads, under the action of gravity ), using the powerful finite element analysis software ANSYS on the structure static analysis, after the use of ANSYS powerful optimization design function, the structure safety, the bar section optimization design, and then on the basis of the existing rod a cross section, a reasonable choice of bar section, reduce the material consumption, to achieve the best economic, reasonable design, implementation can develop continuously, make the satisfactory design.
Design and Simulation Analysis of Hydrostatic Supporting Excitation Hydraulic Cylinder
Authors: Chen Kui Sheng , Fu Shu Guang , Zeng Liang Cai , Zheng Fei Long
Published: December 2012

This paper designs an excitation servo hydraulic cylinder which uses clearance seal and hydrostatic supporting technology for high-speed railway subgrade dynamic response in-situ test system. It puts forward a structure with dynamic pressure chamber and static pressure chamber and calculates the main parameters of the cylinder. The paper briefly introduces the principle of hydrostatic supporting and analyzes the flow characteristics of the hydrostatic supporting oil chamber by simulation based on Fluent.
A Method for Associated Design Based on Skeleton Model
Authors: Fu Lei , Yu Jian Feng , Zhang Jie , Sun Yuan Liang
Published: December 2012

In order to achieve associated design of multi-discipline in aircraft development, a method of associated design based on skeleton model is proposed. Firstly, a method to establish the multi-level skeleton models which can realize the transmission of design intention is proposed and the top skeleton model which can be broke down into more subassembly skeleton model is gained from the general layout; secondly, after a analysis of the longitudinal and transvestite design data among all the skeleton models of an aircraft, a constraint network model among all skeleton models is established to realize the association or unity of design data. Thirdly, the key steps and principles are introduced. Finally, a wing is set as an example to validate this method.
An Analysis on the Failure of Bearing Coordination
Authors: Xu Jie , Cao Jian Guo
Published: December 2012

There are many forms of bearing failure. One of the forms often arises in engineering is that the outer ring of heavy-duty bearing and the corresponding wheel hub generating relative motion. In this article, AutoCAD was used to establish the three-dimensional model of the hub and bearing. With the help of HyperWorks, meshing, setting properties and imposing constraints to three-dimensional model were done. Then the model was imported into Patran to set the exposure and parameters. Therefore, the complete finite element model of was established. And then it was solved using SOL600. Finally, the calculation results were analyzed, and we found out the reason for the failed bearing. Finally, by analyzing the calculation results, the reason for the failure of the bearing was found out. This paper is of certain practical significance and theoretical engineering guiding value.
Analysis of Tire Cornering Stiffness Property under Slight Driving or Braking Condition
Authors: Bai Fan , Guo Kong Hui , Zhang Bao Jun , Lu Dang
Published: December 2012

A tire model considering the lateral and longitudinal stiffness of carcass was built to describe tire cornering stiffness property under slight driving or braking condition. The effects of carcass elastic on the tire cornering stiffness were analyzed by varying carcass stiffness. Analysis shows that tire cornering stiffness have a strong relationship to the tire carcass stiffness and the tire longitudinal force. Tire cornering stiffness increases with the increase of carcass bending stiffness and torsional stiffness. And tire cornering stiffness increases with the increase of the braking force if the carcass translation stiffness in the longitudinal direction is far more than that in the lateral direction. When carcass translation stiffness in the longitudinal direction is equal or less than that in the lateral direction, tire cornering stiffness decreases with the increase of the braking force.
Analysis on the Study of Machine Design from Green Aspect
Authors: Jing Wei Yun , Li Tie
Published: December 2012

With the development of our society, natural resources, environment and population have become more and more important for human beings to live and develop. People started to focus on the “Green” index of products. As a result of that, we should combine environment protection, control and pollutant prevention with the whole process of design and production in mechanical manufacture industries. Additionally, we also should choose the path of sustainable development to improve “Green” index by the rational resources and energy utilization.
Application of CFD to Building Thermal Control Analysis
Authors: Chang Jing Yi , Kuan Yean Der
Published: December 2012

Building-integrated photovoltaic system is to import a photovoltaic panel system into the shell structure of a building by using building design techniques, so that the system constituents not only generate power, but are also a part of the building’s shell. If the photovoltaic panel is integrated with a sun shield, a power benefit could be obtained and both solar irradiation and the cooling load could be reduced. This study aimed to use CFD technology for analysis of building surface thermal control and flow field simulation, and further discuss the effects of the relative position of the sun and atmospheric wind flow field on the distribution of building surface temperatures and flow fields at different hours and in different seasons. Understanding the sun's position and other climatic conditions accurately is helpful for locating solar panels and solar collectors on buildings.
Application of Reverse Engineering Technology on Beverage Packaging
Authors: Tao Chun Sheng , Bai Qiao , Ma Song Bai
Published: December 2012

This article briefly introduces the concept, processes and key technologies of reverse engineering. It demonstrate the feasibility and significance of application of reverse engineering technology on beverage packaging by rebuilding the model for a beverage bottle with complex geometries: firstly, acquiring point cloud data of the beverage bottle by 3D laser scanning system; then processing point cloud data and materializing model by using reverse engineering software; finally, rebuilding CAD model. The application could provide a new method of designing beverage packaging.
Application Research of Design Ethics in the Product Design
Authors: Yu Rong Biao
Published: December 2012

Through the analysis of design ethics principle and content, the design concept of humanism, sustainable development and harmonious are applied to the Touch mouse product design practice, and analyzed the its positive significance in market research, product design positioning, concept sketches design, computer aided industrial design and shell structure design, effectively avoid the appear of various product function, complex modelling, large energy consumption and pollution mode, so as to design a fashion practical and green environmental protection Touch type new mouse, and provide a high quality IT products for consumers. Finally, the goal of balance and harmony between the people, resources and environment is realized.
Cell Layout of Aircraft Assembly System Based on Sequence Pair
Authors: Xu Jia Jia , Li Yuan , Yu Jian Feng , Zhang Jie
Published: December 2012

This paper aims to investigate the cell layout problem of aircraft assembly system. A mathematical model for this problem is proposed, taking into account the integration design of cell layout and logistics network. The means of logistics transportation are divided into horizontal transportation and space transportation, meanwhile, the logistics transportation route is calculated. Based on sequence pair, the presentation of solution structure for cell layout is put forward, and the solution structure is solved using simulated annealing algorithm. This method is applied successfully to the assembly cell layout of the fuselage-wing assembly system for a giant aircraft, and the result shows its feasibility and effectiveness.
Impact and Flexural Properties of Imbalance Plain Woven Coir and Kenaf Composite
Authors: Azrin Hani Abdul Rashid , Seang Chan Tze , Ahmad Roslan , Mariatti Jaafar Mustapha
Published: December 2012

Natural fibre has become the subject of interest for research and development by various organizations due to its biodegradable and competitive mechanical properties. However most of the researchers are focusing on random orientation and compressed mat with only little researches concerned with woven or textile structure. This research work involved with mechanical analysis of woven natural fibres composite specifically coir and kenaf natural fibres. Plain woven coir and kenaf were produced from their yarns using self designed weaving device. The woven fibres were then converted as reinforcement in composite. Woven composite was prepared using manual hand lay up technique couple with vacuum bagging. Impact penetration and flexural (three point bending) test were conducted on composite sample. Morphological analysis was performed using Scanning Electron Microscope (SEM). From the results obtained, dry woven coir composite displayed better mechanical properties for both impact and flexural properties compared to kenaf composite. Warp direction of coir composite and kenaf composite showed a better flexural strength compared to weft composite direction. Coir yarn with slight lower fineness value than kenaf yarn had contributed to the higher fibre density in woven structure. The structure used as composite reinforcement in turn produced better mechanical properties.
Design and Application of a Planetary Gearbox for Small Wind Turbines
Authors: Park Sung Hoon , Yang Hyun Dai , Kim Jee Ho , Shin Joong Ho
Published: December 2012

A planetary gear train consists of a sun gear, planet gears, and a ring gear and these gears are arranged as a concentric circle type. The gearbox proposed in this study arranges the planetary gear type as a double planetary gear train in which the output of the primary gear train is used as an input to the secondary planetary gear for accelerating its speed. In this design, a method that directly connects the input and output sections is introduced to obtain a high acceleration ratio and its applicability is verified for applying it to a small wind turbine through designing and fabricating the planetary gearbox.
Design of Lightweight Graded Hot Structures for Hypersonic Vehicles
Authors: Lu Qin , Jiang Gui Qing , Zhang Xue Jun , Deng Dai Ying
Published: December 2012

New-type hypersonic vehicle will encounter significant challenges due to severe heating environments during its long-time hypersonic flying in the atmosphere. Therefore, resusable, lightweight, high thermal resistance and anti-collision are demanded for Thermal Protection System. Traditional thermal protection system(TPS) can’t survive extreme thermal environments. In this paper, lightweight and integrated graded hot structures which composed of functionally graded materials (FGM) are addressed according to new thermal environment. It has been established nonlinear fundamental equations for hot structures. It is significant that gradation in material properties of hot structures allows the designer to tailor thermal response to meet variable thermal environment.
Development of Computer Aided Design System for Ordinary V-Belt Transmission Based on VB
Authors: She Wen Zhi , Gu Li Zhi , Zhou Zong Zhi
Published: December 2012

The computer-aided design is applied more and more widely in the engineering field. In order to enhance the design efficiency of the V-belt transmission, combined the computer-aided design with the optimization design. With the analysis on the characteristics of chart data in the traditional design, put forward a programmed method for the data, lists, charts in the ordinary V-belt transmission design, by using the linear weighted sum method with VB as a programming language, to establish the optimal mathematical model. A sample has been carried out and results have shown that the programmed method may simplify the design process and reach the purpose of improving the design efficiency and accuracy.
Engineering Change Propagation Analysis Based on Linkage Model in Complex Product Development
Authors: Wang Yang , Duan Gui Jiang
Published: December 2012

To handle change propagations during complex product development, an analysis framework based on linkage model was proposed. Firstly linkage was defined to encapsulate the relations among product characteristics, and methods of linkage identification from multi-dimensions and linkage model construction were given. Then how to identify change propagation paths step by step in open scene and how to identify change propagation paths with improved mouse maze algorithm in closed scene were discussed. In the following a quantitative evaluation method of change impact risk was advanced. Finally an example of carrier robot moving structure design change was provided to validate this method.
Ergonomics Evaluation of Interior Environment of Aircraft Passenger Cabin Based on Multi-Hierarchy Grey Relation
Authors: Jiang Chao , Yu Sui Huai , Yao Lan
Published: December 2012

For a more reasonable evaluating method of the ergonomics performance of airplane passenger cabin interior environment, the system of related evaluation indexes was analyzed and proposed, the hierarchies and the character of grey system were clarified, the index weights were established, and three design works were evaluated by the MHGR model practically and feed back with some constructive design suggestions. The result indicates that the MHGR model used in Ergonomics evaluation can obtain accurate and scientific consequences.
Finite Element Analysis of Multi-Roller Contact Roller-Gear Cam Reducer
Authors: Cao Ju Jiang , Feng Cheng Guo , Zhang Lei
Published: December 2012

This paper presents the multi-roller contact roller-gear cam reducer. It’s a special kind of the indexing roller-gear cam that changes the stopping stage of the indexing cam to zero and chooses the equal-velocity law. And with multi-roller contact the carrying capacity is greatly improved. In this paper, we created the 3D solid model of the main components of the reducer: the cam, the turntable and the rollers. After that, we used the FEA software ANSYS Workbench to calculate the static structural behavior and the results showed us the weak or dangerous part of the mechanism so that we can optimize the structural. However the static structural behavior does not always shows the working condition. Thus we calculated the flexible dynamic behavior of the reducer and it showed us vividly that which part is weak and we could see the real deformation and stress distribution of the structural while working. Then we can pay more attention to these parts.
Finite-Element Analysis and Optimization for Gradient Porous Structure of Artificial Bone
Authors: Qi Yan Mei , Yang Li Jun , Wang Li Li
Published: December 2012

The loading force of the artificial bone implanted into the human body and the flowing, growth and deposition of cells were influenced by the gradient porous structure. The software of ANSYS Workbench was used in the paper for the stress and strain analysis of the gradient porous structure of the established 3D artificial bone. The variation of the maximum equivalent stress and maximum equivalent strain and elastic modulus changed through the changing of the loading force and porosity. Basis on meeting the mechanical properties, the porosity was used as the index for the optimization of the porous structure of the artificial bone. And it also laid the foundation for the subsequent laser sintering.
Finite-Element Analysis and Reliability Test of Power Steering Gear on the Fatigue Performance
Authors: Wu Ying , Li Jun , Lu Wen Hao , Xiong Shi Yuan
Published: December 2012

The study on power steering gear is less than other auto parts at home or abroad. Compared with developed countries, the independent design and manufacture of power steering starts late, and lacks practical and effective evaluation standards. The combination of the theoretical analysis, numerical calculation and experimental verification is the key technology to optimize the design or test to evaluate the power steering gear’s function and performance. In this paper, the power steering gear’s finite element analysis(FEA) model was built to analyse the fatigue stress and fatigue life of the power steering gear’s components, such as housing, input shaft and output shaft. and the fatigue test of the power steering gear was also designed and implemented. Research showed that, the power steering gear fatigue properties of FEA and reliability test have the same results. The total damage of 4 A-B-C event cycles is less than 1, the steering gear system is judged safe after 4 event cycles per design requirements. Each component of the power steering gear has different maximum average stress. The stress of the sector shaft, the piston and the screws is very close to the yield stress, which is much larger than the other components, and needed to be treated with caution The maximum stresses of the gear housing are a little over the yield strengths at the stress of 6,118 lbs, which is more dangerous than the other components, and great attention should be paid to it.
Gridless Adaptive Method for Simulating Unsteady Flows with Moving Shocks
Authors: Pu Sai Hu
Published: December 2012

In this paper, the gridless adaptive method is extended to simulate unsteady flows with moving shocks. In order to capture physical features like moving shocks with local high resolution, a technique of dynamic cloud of points is achieved by adopting clouds refinement and clouds coarsening procedures during the evolution of the unsteady flows. The regions for clouds refinement and clouds coarsening are determined at every time step by an indicator, which is defined as a function of the local pressure gradient. Once the regions of cloud of points to be adjusted are located by the indicator, the clouds refinement is carried out by introducing new points based on the existing structure of cloud of points, and the clouds coarsening procedure is also implemented simultaneously in order to control the size of the points distributed in the whole computational domain. The numerical test cases show that the gridless adaptive method presented can capture moving shocks with high resolution successfully in both inviscid and viscous test cases.
Jitter Transmission Analysis and Experimental Research for Frame Structure in the Median and High Frequency Regions
Authors: Wang You Yi , Zhao Yang , Ma Wen Lai
Published: December 2012

Frame structure is widely used in practical projects. For jitter of the frame structure excited by median and high frequency disturbances, firstly, the dynamic model of thin plate substructure is built by wave method, and then the dynamic model of frame structure is established by combining wave method and substructure technique. At last, the accurate dynamic response was obtained. The simulation of dynamic characteristic is made, and simulation results are compared with FEM results. On this basis, modal experiment and frequency response experiment is done to verify theoretical results. In comparison to FEM, the results by wave method are accurate in low frequency regions, and the results are more accurate in the median and high frequency regions. The experiment proves wave method is correct and effective for jitter transmission analysis of frame structure in the median and high frequency regions.
Kinematic Solution of 6-DOF Stewart Mechanism Applying Mathematic and Simulation Method
Authors: Zhang Xue Ling , Duan Xiu Bing , Chai Shu Feng
Published: December 2012

In order to control the 6-DOF Stewart mechanisms to move accurately with given position and pose, technology of virtual reality, simulation and modeling are adopted, kinematic/dynamic model of Stewart mechanisms is built, under the physical displacement its movement is computed and simulated, by which the difficult problem of solving the normal kinematics solution of Stewart mechanisms is solved. Compare the pose curves of mechanisms top platform which are initialized and solved by simulation, the resemblance of two curves shows that the solving method of Stewart mechanisms is correct and accurate, and it can be used in controlling of real mechanisms.
Kinematics Performance Simulation and Optimization of Large Face-Shovel Hydraulic Excavator Working Device Based on ADAMS
Authors: She Yi Ni , Ning Xiao Bin , Lin Qiong
Published: December 2012

In order to study the influence of key hinge point’s positions to the kinematical performance of the face-shovel hydraulic excavator working device, a forward kinematics model of the working device is presented firstly. And then the simulation model is established in ADAMS. The working processes are simulated and the bucket digging envelope diagram is drawn. Then different simulation models in ADAMS are established by using Monte Carlo method to sample data which are the range of key hinge point’s position. According to a certain order and requirement of objective response, the model with better motive performance can be chosen. The results show that the chosen model has better kinematical performance than that of the initial model where all of important objective responses can be improved differently.
Phloridzin Isolated from Apple Pomace by Resin
Authors: Liu Di , Shang Hua , Ji Hui Jun
Published: December 2012

In order to investigate the processing technology of phloridzin isolated from apple pomace by resin, apple pomace was used as raw material in this study, and HPLC was used to test phloridzin content. Absorption rates and desorption rates of phloridzin from 5 resins (LS-6、HPD-600、XDA-8、D-101、D4020) were contrasted, and the best resin for isolation was chosen. The best processing technology was determined by single factor experiment. The result shows that D-101 resin exhibits higher absorption rate and highest desorption rate, and it is the best resin for phloridzin isolation; the best processing technology: the absorbed solution content is 0.45 mg/mL, the absorption flow rate is 1.0 mL/min, the desorption solution pH is 7, the desorption solution is 90% ethanol, the adsorption flow rate is 0.5mL/min.
The Mineral Chemistry and Classification of New Ordinary Chondrites Collected in Antarctica
Authors: Wang Bao Hua , Li Shi Jie , Miao Bing Kui
Published: December 2012

Petrography and mineral chemistry of ninety-eight ordinary chondrites from Grove Mountains, Antarctica, have been studied, in order to assign their chemical-petrographic types. The chemical-petrographic types of these meteorites are presented below: 36 H-groups (21 H4, 9 H5, 6 H6) and 62 L-groups (25 L5, 37 L6). The compositions of olivines and low-Ca pyroxenes in the all these ordinary chondrites have similar composition, respectively, reflecting some degree thermodynamics equilibration in them. The weathering degrees of all the ordinary chondrites, consisting of predominant weathering degrees of W1, suggest lightly weathered among them. More than 30% meteorites experienced severe shock metamorphism, as indicated by the presences of shock-induced melt veins and pockets. These heavily shocked meteorites provide us with natural samples for study of high-pressure polymorphs of minerals.
Preparation and Characterization of Cyclophosphamide-Loaded Chitosan Microspheres
Authors: Ding Yi Lin , Ding Su Su , Ding Guo Fang
Published: December 2012

Chitosan microspheres were prepared by using a cross linking agent combined with an emulsion technique. Cyclophosphamide was loaded as an anticancer agent. Obtained microspheres were spherical and regular, with a smooth surface morphology, having an average diameter of 15.7±9.0μm. After preparation, the drug-loading rate and entrapment rate of cyclophosphamide was investigated by UV spectrophotometry. Drug release was tested in vitro in a dynamic dialysis system with a dialysis bag. The chitosan microspheres prepared were proved to have good drug release profiles.
Study on Adsorption Properties of Anion Exchange Fiber
Authors: Yang Sun , Zheng Wu
Published: December 2012

This paper mainly introduces the static method and dynamic method to study the adsorption properties of CrO42- and F- by using the anion exchange fiber, and then compares the adsorption properties of the hydroxide-type and chlorine-type anion exchange fiber. The results show that the anion exchange fiber has excellent performance of the fast adsorption rate and adsorption capacity.
PPS/Metal Composite Materials Preparation and Friction Performance
Authors: Luo Zhi Gao , Zhao Bing , Li Jin , Xu Jian Wei
Published: December 2012

In the roughened surface of 25# steel composite with a plastic layer which consists of PPS、TLCP、TPI and Graphite. The dry friction performance of composite material was tested in room temperature environment. The surface of wear was observed and analyzed by scanning electron microscope. Finally, to analyze the bond strength between the metal material and plastic work layer through the bond strength test. The results showed: the composite material has excellent tribological properties, after the shot peening coarsening in the metal matrix surface can well improve the binding force between plastic layer and metal matrix, the thickness of plastic layer has a certain effect to bond strength, the maximum bond strength was obtained when the thickness of 1.5 mm.
Discuss the Applications of the Automotive Lightweight Materials in China Briefly
Authors: Wang Xiu Jie , Chen Yi Song
Published: December 2012

Before the Copenhagen Conference china had made a solemn promise that the unit GDP emission of carbon dioxide would drop than 2005 40%~45% before the year of 2020. To achieve this goal, at the same time in order to realize the sustainable development of the whole society, our country is actively travel commitments, and is working to promote automotive industry’s energy saving and emission reduction, green development. Through the use of lightweight materials, is an effective way to achieve vehicle energy saving and environmental protection. Although in the "Eleventh Five-Year Plan", we have obtained partial victory in the course of promoting the application of automotive light materials, but in comparison with powerful countries of the automobile, automobile enterprises of our country is still at the starting stage. In this paper, firstly, the main difference between China's automobile enterprises in lightweight materials application with multinational enterprises is described, and then the main reasons are analyzed. Finally, on the basis of this, some countermeasures and suggestions are given.
Synthesis of Microcrystalline Cellulose Grafting Poly (methyl methacrylate) Copolymers by ATRP in 1-Allyl-3-Methylimidazolium Chloride
Authors: Tang Er Jun , Yuan Miao , Li Liang , Bian Feng , Zhao Di Shun
Published: December 2012

The microcrystalline cellulose grafting polymethylmethacrylate (MCC-g-PMMA) copolymer was successfully synthesized by atom transfer radical polymerization (ATRP) using ethanediamine as ligand in Ionic liquid 1-allyl-3-methylimidazolium chloride ([AMIM]Cl). The MCC-g-PMMA was characterized by FT-IR, 1H NMR, SEM and GPC spectroscopies. The results confirmed that the PMMA had been covalently bonded to cellulose backbone. The molecular weight of graft copolymers linearly increased during the polymerization and presented a low polydispersity.
Observation of a Lamella Structure in a Baked Carbon
Authors: Wen Ke Yun , Xu You Liang , Li Li Li , Chen Jian Mei , Xiao Peng
Published: December 2012

Transmission electron microscopy (TEM) study of a baked carbon revealed the occurrence of a lamella structure, in addition to the isotropic structure. Selected area diffraction (SAD) and High resolution transmission electron microscopy (HRTEM) were employed to study the microtexture of the lamella structure and the isotropic structure. The lamella structure was shown to exhibit a much higher degree of order than the isotropic structure. The cracks between lamella and their possible development with heat treatment temperature as well as their possible relation to the Mrozowski cracks in graphite are discussed.
Photoreactive Carbon and Nitrogen-Codoped ZnWO4 Nanoparticles: Synthesis and Reactivity
Authors: Chen Su Hua , Wang Bi Xuan , Qiu Xian Hua , Xiong Zhen Sheng
Published: December 2012

In order to improve ZnWO4 photocatalytic activity under visible light, the C, N-codoped ZnWO4 nanoparticles have been successfully synthesized by choosing C3N4 generated from tripolycyanamide pyrolysis as the source of Carbon and Nitrogen and the influence of C3N4 concentration on structural, optical and morphological properties of C, N-codoped ZnWO4 using X-ray diffraction (XRD), UV-visible spectroscopy, scanning electron microscopy (SEM) and photocatalytic decoloration of rhodamine B (RhB) aqueous solution under visible light. It was found that the presence of carbon and nitrogen could not improve the crystallization of ZnWO4 species but could enhance their photoabsorption property in the visible region. The results also showed that the photocatalytic activity of the as-prepared ZnWO4 is higher than that of pure ZnWO4 with the optimum effect occurring at RC3N4 = 9 % (the weight ratio of tripolycyanamide to ZnWO4)
Cytotoxic Effects of Transforming Growth Factor-α Conjugated with Cytotoxin Saporin on Proliferating Vascular Smooth Muscle Cells
Authors: Yang Jun , Chu Chun , Deng Biao , Ding Sai Liang , Wang Guang Hui , Zhang Yong , Quan Zhi Hua
Published: December 2012

Abstract Objective To testify the special cytotoxicity of TGF-alpha-SAP on proliferating vascular smooth muscle cells and endothelial cells. Methods Conjugation of saporin to TGF-alpha was accomplished after derivatization of saporin and TGF-alpha with N-succinimidyl-3 (2-pyridyldithio) proprionate and final purification of the conjugate was achieved within Eppendorf Centrifugal Filter Cytotoxicity assays were measured by cell count. The studies of influence of TGF-alpha-SAP on values of Thymidine and leucine incorporation into SMCs and ECs were measured by 3H-thymidine uptake and 3H-leucine uptake, respectively. and receptor competition studies of TGF-alpha-SAP are measured by adding excess TGF-alpha in SMCs exposed for TGF-SAP. Results Cytotoxicity assays testified TGF-alpha-SAP conjugate could inhibit remarkably proliferation of SMCs in culture. The values of thymidine of TGF-alpha-SAP group (10-9M and 10-7M) in comparison significantly decreased to 60.9% and 56.0% of the control group respectively, suggesting that cellular DNA synthesis obviously decreased as TGF-alpha-SAP was added. But Saporin did not affect cellular DNA synthesis at higher level. The rate of 3H-leucine incorporation of TGF-alpha-SAP group significantly decreased to 47.3% of the control group, suggesting that SMCs protein synthesis obviously decreased as TGF-alpha-SAP was added. But TGF-alpha-SAP at the same level did not affect DNA synthesis and protein synthesis of ECs compared with the control group. Conclusion The results indicated that TGF-alpha-SAP possesses the more effective cytotoxicity than Saporin and the more special citotoxicity on proliferating vascular smooth muscle cells than on proliferating endothelial cells. Key words：cytotoxicity;selective; Drug-eluting stents;proliferation;saporin
Wind Power Prediction Based on Similar Day Clustering Support Vector Machine
Authors: Wang Xian Bin , Ding Zhi Yong , Yang Ping , Yang Xi
Published: December 2012

Wind power prediction technology is important to improve the reliability of grid-connected, the common statistic modeling method result is not satisfied because it lacks of effective pretreatment. This paper puts forward wind power prediction based on similar day clustering support vector machine, which catches the training data by similar day and modeling respectively, each model is used to predict specific similar days. Experiment on a wind farm shows the proposed method is effective.
Study on Turbine Blade Abrasion Mechanism and Abrasion Resistance Performance Testing Machine
Authors: Li Hao Ping , Li Feng , Fang Zhi Fan , Chen Yong Qing
Published: December 2012

This paper studied the flow indicators affecting abrasion through turbine component surface, analyzed the indicator data of major rivers, which provided design parameters and design basis of the abrasion test equipment; and studied abrasion test methods of turbine overflow surface, determined the rotating-jet mode abrasion test principle and design parameters of the rotating-jet abrasion testing machine
Research on Contact Force Control in Process of Aspheric Surface Polish
Authors: Lin Jie Qiong , Ran Tong Huan , Feng Li
Published: December 2012

Contact force control is one of the key technologies of polishing aspheric optical parts, and keeping a stable polishing contact force on the basis of accurate position control is an important condition to obtain high quality aspheric. The paper bases on ideal surface, decouples the contact force that between polishing tool and workpiece in each direction of the drive shaft in process of polish. Then get output force of all sports shaft. Finally, realize the polishing contact force control that take the position as a control goals, and take constant force output as a constraints. Simulation results show that the control method can achieve constant contact force output in the processing of polishing free-form surface, which provide a new idea to research the compliant control of polishing free-form surface.
Research on Exhaust Gas Temperature inside Catalytic Honeycomb Monolith Channel of Natural Gas Burner Start-up
Authors: Wang Zhi Hua , Zhang Shi Hong
Published: December 2012

This article discussed exhaust gas temperature and pollutant emissions characteristics of the combustion of rich natural gas-air mixtures in Pd metal based honeycomb monoliths in burner during the period of start-up process. The burner need to be ignited by gas phase combustion with the excessive air coefficient (a) at 1.3. The experimental results in catalytic monolith can be explained from SPFR. In this experiment, exhaust gas temperature and pollutant emissions were measured by thermocouple K of diameter 0.5 and the analyser every 1 minute, respectively. The finding would be applied for industrial catalytic combustion process start-up.
A New Experimental Identification Method for Fluid-Induced Force in Labyrinth Seals
Authors: Sun Dan , Ai Yan Ting , Zhang Wan Fu , Yang Jian Gang
Published: December 2012

Seal force is an important factor in turbomachineries. The paper puts forward an expanded seal force identification model. A seal test rig with many sets of seals was set up. The distributed seal force in the cylinder was equivalent to the two selected planes by using double-plane unbalance force identification theory in rotordynamics. To consider the complex vibration of cylinder with the increasing rotating speed and inlet pressure, the cylinder was regarded as a vibration system with 4 degree of freedom. The 4×4 impedance matrix was tested with shaker at the two selected planes in two orthogonal directions. The equivalent seal force can be obtained via multiplying the impedance matrix by the measured cylinder vibration change. Influence of inlet pressure, rotating speed, eccentricity ratio, rotor vibration, and clearance was tested in the seal rig. Test results show that the seal force increases almost linearly with increasing inlet pressure, eccentricity ratio and vibration amplitude.
A Pseudo-Fourier Series Method and its Application in Tilt Data Processing
Authors: Wu Ye , Yang Shu , Zhao Xiao Yan
Published: December 2012

The basic principle of a new pseudo-Fourier series method is derived in detail in this paper. Simulation experiments show that the algorithm can effectively remove the noise and preserve signal's original energy effectively compared with the filtering results based on adaptive LMS algorithm. In addition, the experiment shows that the filtering speed of like Fourier methods is about 25 times the speed of adaptive LMS algorithm. The four types of ground tides are successfully filtered for picking-up the long-term trend of the tilt observation.
Research Progress of Application of Porous Polymer in Energy Storage
Authors: Fang Zhang , Yang Yu
Published: December 2012

Nowadays, one of the research emphases in clean energy field is to apply porous polymer as energy storage media to capture and save abundant energy. Researches in this area focus on theoretical methods and syntheses of new materials. Researches on theoretical methods include investigations on mechanical strength, characteristic of heat and mass transfer, internal structure and hydrophilicity of materials using mathematical, physical and chemical methods. Syntheses of new materials include synthesis of porous carbon and porous metal organic frameworks materials and construction of battery structure use polymer organics as matrix.
The Efficiency of Material Utilization and Energy Conversion of Biogas Fermentation by Annua
Authors: Wang Chang Mei , Zhang Wu Di , Chen Yu Bao , Yin Fang , Liu Shi Qing , Zhao Xing Lin , Liu Jing
Published: December 2012

This paper used annua as material to do a biogas fermentation experiment. The result suggests that biogas-fermentation by pretreated annua is a preferable approach compared with methane production followed by hydrogen production, only methane production, or only hydrogen production, due to its decreasing overall fermentation time, and increasing material utilization efficiency and energy conversion efficiency. It shows that the TS and VS utilization ratio of first hydrogen production then methane production is higher than that of first methane production then hydrogen production.
Tendency of Beach Surface between Maojiagang Two Moles
Authors: Wang Ke Dao , Wang Jin Hua
Published: December 2012

After Maojiagang two moles was established, beach surfaces between two moles have occurred obvious silt up, rush to silt tendency and have occurred obvious change. The speed that beach surface silts up has occurred obvious change: In first year, it is rapid that beach surface silt up; Second year, beach surface silts up obvious slack off , and reaches balance step by step; After 3 years, beach surface silt up was obvious seasonal change elevation change.
Digital Walking Control System Study for Asphalt Paver Based on DSP
Authors: Tao Wu
Published: December 2012

The digital control system of the walking system of the asphalt paver based on the TMS320LF2407 DSP is introduced in this paper. The paper accomplishes the software and hardware design of the control system, integrates the PID and fuzzy control into the design of the digital control system so as to conduct constant-velocity control under paving. The thesis proves fuzzy-adjustable-PID control is superior to traditional PID control by simulation and analysis. The feasibility and rationality of control system design are proved by the test.
Preparation and Properties of Graphene/Polyamide 6 Composites by Melt Compounding
Authors: Zhang Pei Pei , Zhu Ke Ying , Su Li Qiang , Xiao Ru
Published: December 2012

In this paper, graphene was obtained by Oxidation-reduction method. The obtained graphene was characterized by XRD and FTIR. On this basis, graphene/polyamide 6(PA6) composites were prepared by melt compounding. The well-dispersed graphene nanosheets in PA6 matrix was investigated by SEM. The properties were characterized by XRD, DSC and TGA. The results showed that the α-phase of polyamide 6 induced into γ-phase by adding graphene. The crystallization temperature and the crystallinity of composites have been increased in some degree. Besides, the composite has a higher thermal stability.
Collaborative Design of the Injection Mould
Authors: Liu Chang Hong
Published: December 2012

In this paper, a method for injection mould of concurrent development was put forward based on graph theory and design structure matrix. In activities identification phase, coupled activity was identified by Boolean operation of adjacent matrix, accessible matrix and strong connected matrix. After re-engineering and optimizing, a structured model is established to open out the principle of the concurrent injection mould design process. The method has the advantage of flexibility to deal with the interrelationship of various tasks, which greatly improved the efficiency of development.
An Improved MPPT Algorithm for Off-Grid Wind Power Generator Based on Hill Climbing Method
Authors: Yang Ping , Liang Ping Sheng
Published: December 2012

The control algorithm of maximum power point tracking (MPPT) plays a key role in improving the wind energy conversion efficiency. This paper proposes an improved MPPT control algorithm based on hill climbing method, which combines proportional control with hill climbing method, with the advantage of precise steady-state control from hill climbing method, the combination with proportional control enhances the speed of dynamic response. By using this algorithm in the wind power simulation system based on Matlab, we get the simulation results for both fixed and variable wind speed. The result shows that this improved algorithm can track the maximum power point of wind power generation system quickly and precisely.
A Simulation Model for Multi-Factor Sensitivity Analysis on Energy Demand
Authors: Tan Zhong Fu , Wang Shu Xiang , Zhang Chen , Lin Li Qiong , Zhao Yin Hui
Published: December 2012

This paper analyses multi influencing factors of energy demand, using energy demand forecast regression model reveals inner relations between each factor and energy demand. Establish simulation model of the relation between GDP, energy intense and energy demand. Under the change in population, urbanization and energy efficiency, this paper gives analysis model of energy demand change.
Color Image Segmentation Based on Dynamic Model and Power Spectrum
Authors: Chen Yu Pu , Qiao Yuan Hua , Miao Jun
Published: December 2012

In this paper, the locally coupled neural oscillator model and power spectrum are introduced to solve the color image segmentation problem. Firstly the single neuron oscillator model is developed, the model parameter is set so as to create limit circle simulating the activity of neuron. Then the locally coupled network model is developed, taking R, G, Bas external input separately, the network output three dynamic orbits representing R, G, B for each image point. Lastly, the power spectrum of the orbits is calculated for each image point, the color image is segmented using the calculated power spectrum. The performance is comparable to the results from other segmentation methods.