bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of Subsection Optimal Acceleration Control Law of Aircraft Engines Using Fuzzy Switching Based on a Cloud Model
Authors: Qiu Xiao Jie , Huang Jin Quan , Lu Feng
Published: August 2011

Considering the problem of optimal acceleration control of aircraft engine, the subsection optimal acceleration control method using fuzzy switching based on a cloud model is proposed. The acceleration process is divided into three phases, optimal objective functions and constraints are different in each phase. The optimal acceleration control law is obtained using the SQP algorithm with adjusted objective functions and constraints to improve the ability of engine acceleration. Considering the significant jump of control parameters and the exceeding limit of aircraft engine state parameters problem during the shift of different phase on the acceleration process, the method of fuzzy switching controller based on a cloud model is designed. Compared with the normal SQP acceleration control law and the subsection one based on direct switching, the simulation results show that the proposed method not only is the most effective control law but also can ensure the aircraft engine stable.
Kinematic Reliability Analysis of Five-Axis Machine Tool
Authors: Yang Qiang , Sun Zhi Li , Shi Yan Yan , Jia Dan Dan , Yan Yu Tao
Published: August 2011

Five-axis CNC machine tool is the top product of numerically controlled machine tool. Kinmatic accuracy is an important index to evaluate the quality of mechanism. Kinematic accuracy analysis of the Five-axis machine tool in previous study ignores the randomness of each input error component, so the conclusions are imprecise. Using the homogeneous transformation, inverse kinematics of VMC650 Five-axis machine tool is calculated. Based on Multi-body System Theory, error model of the machine tool is presented. Considering the randomness of every input error components, applying the Monte Carlo method, math model of kinematic reliability of the mechanism is deduced. The calculation method of kinematics reliability are put forward applying point evaluation and track evaluation. Kinematic reliability analysis provides some theoretical reference for improving the machining accuracy and operation life of machine tool.
Synthesis of Magnesium Oxide Nanomaterials Using Magnesium Carbonate as Precursors
Authors: Wang Guo Sheng , Sun Dong Liang , Liang Hai , Kong Chang Yi
Published: August 2011

Petaliform magnesium oxide nanomaterials were prepared by which the basic magnesium carbonate made from light burning powder of low grade magnesite were used as precursor. The XRD results indicated that aqueous magnesium carbonate changed to basic magnesium carbonate (4MgCO3•Mg(OH)2 •4H2O) when heating temperature reached 95°C, the SEM confirmed that the morpholoZgy of basic magnesium carbonate (4MgCO3•Mg(OH)2•4H2O) were petaliform, after calcinations the magnesium oxide with the same morphologies as precursors’ were obtained, simultaneously , the products with high activity (iodine value of 197mgI2/g).
Optimization for the Air-Pod Shape
Authors: Qiao Yan Chao , Guo Zi Qi , Zhang Bao Gang , Shi Yao Lin
Published: August 2011

in order to optimize the air-pod shape, this paper details work conducted using the commercial CFD software package ANSYS: Fluent to simulate the aerodynamic of air-pod. In our research, the results as followed: 1) In the benchmark, our comparative analysis of the flow over the NASA 0012 airfoil from the Experimental Data Base for Computer Program Assessment (AGARD-AR-138, 1979) implies that the ANSYS: Fluent software package numerical method simulates the airfoil viscous flow with the same accuracy as the wind-tunnel experiment. We can use it to finish our research. 2) We build the 3-D model to compute the aerodynamic of the air-pod. We choose the cylinder at first step. From the results we can see the pressure and wall shear concentrate at the side face of the cylinder. The pressure at the side faces is about twice than the direct side. Next step we will compute different models, such as spherical and drop-shaped, et al. then we can compare the pressure and wall shear field value for different models at different conditions. This work gives us best way to optimize the aerodynamic shape of air-pod.
The Research of Hydraulic System Anti-Vibration and Noise Reduction
Authors: He Zhi Yong , He Qing Hua , He Shang Hong
Published: August 2011

In this paper, the hazards of hydraulic pipeline system vibration and noise were introduced, the causes of vibration and noise of hydraulic pump circuit were analyzed and its frequency components were discussed. A wave filter of structure resonator based on Fluid-structure coupling vibration is designed and manufactured according to the principle of gas muffler. The differential equation of rectangular plate transverse free vibration characteristics was established, the coupling vibration resonance frequency of filter structure vibration body was obtained about 218Hz by solving differential equation according to the Rayleigh - Ritz method. The hydraulic pump flow pulsation frequency was adjusted respectively 215.55 Hz and 197.4 Hz through frequency conversion motor adjustment, and then comparative experiments were tested on the hydraulic system pressure fluctuation test experimental platform. Experiments show that, when the inherent resonance frequency of filter structural vibration body was approached the hydraulic system frequency, system pulse energy would be effectively attenuated, system pressure fluctuations would be greatly reduced and pulse rate was dropped from 3.65％to 0.28％. The attenuation of the effects of pressure pulsations was validated through experimental research, but also its defects that the filter has frequency selectivity and band narrow were founded The later research direction was put forward and new technology for hydraulic system vibration control was provided.
On Design and Simulation of Turtle-Shape Shunt Taps
Authors: Zhou Li Kun
Published: August 2011

In order to fill fuel in special occasions for actual demand , the turtle-shape shunt taps has been designed on the principle of bionics design. This essay proposed the design concept and overall design ideas and rechecked the parameters of its strength. Finally, SolidWorks was used to make the three-dimensional model of the turtle-shape shunt taps. In addition, COSMOS was adopted to carry out the stress simulation for the turtle-shape taps.
Dry Sliding Wear of Oil Palm Empty Fruit Bunch (OPEFB) Epoxy Composite
Authors: Kasolang Salmiah , Kalam Anizah , Ahmad Mohamad Ali
Published: August 2011

This paper presents an experimental study carried out to determine the effects of fibre size on the mass loss, specific wear rate, roughness, and temperature distribution of Oil Palm Empty Fruit Bunch (OPEFB) epoxy composites. These epoxy samples were produced by mixing raw OPEFB fibres with epoxy. The samples were prepared at different sizes of fibres (100, 125, 180 and 250µm). Wear tests in dry sliding condition was carried out using Abrasion Resistance Tester (TR-600. The wear tests were performed at room temperature with two different loads (10 and 30N) and at constant sliding velocity of 1.4m/s. Mass loss and specific wear rate values for the composite materials were obtained and roughness values before and after abrasion were recorded. Temperature changes during abrasion testing of the composite surfaces were also captured using Infrared Camera. The mass loss was significantly higher for the smallest fibre size (100µm) examined at 30N. At other fibre sizes, the mass loss values were relatively closed. Distribution and orientation of fibres are suspected to have influenced the trend observed in the results.
Experimental Research on Deep-Bed Drying Characteristics of Maize
Authors: Ma Xing Zao , Li Chang You , Zhang Li Li , Shen Wen Hao
Published: August 2011

In this paper, the deep-bed drying rate was analyzed under different bed depths and air temperatures. It was found that the bed depth had a greater impact on the drying efficiency, and if the initial moisture content of maize and the ventilation temperature are higher, the effect would be much more notable. The results will provide a basis for optimal design of the deep-bed drying devices.
Physiological and Biochemical Characteristics and Desilication Ability of Bacillus Mucilaginosus Screened from Poyang Lake Area of Jiangxi Province
Authors: Zhang Li Ming , Sun De Si , Bo Yang
Published: August 2011

18 strains of Bacillus mucilaginosus were sampled from Poyang Lake area of Jiangxi province in China . Morphology and physio-biochemical characteristics and desilication ability on bauxite were studied. The results showed that all strains are rods and produced spores from elliptical to circular， while strains of P8、P11、P15 are short rod. Gram reaction of 18 strains are negative.The strains can use nitrites and ammonium salt as nitrogen source, and survived in the nitrogen free medium. P4、P3 showed strong desilication ability, compared to blank control the content of soluble SiO2 increased to 4.57、4.13 times respectively; P2、 P7、P9 could tolerate 4% NaCl and were growing well at the temperature ranging from 25~35 °C.
Bitmap-Base Association Rule Optimization Algorithm and Application in Equipment Fault Diagnosis
Authors: Zhu Qing Xiang , Zhang Lei , Liu Jing , Jiao Peng Sha , Hao Hong Hong
Published: August 2011

The Apriori algorithm needs to continue scanning the database and may provide mass candidate itemsets in fault diagnosis process which causes the mining speed too slow and the computer memory too large. According to these weaknesses this paper presents the bitmap-base association rule optimization algorithm (BARO). The BARO improves the data structure to reduce the scanning frequency of database and compresses the matrix to reduce the quantity of candidate itemsets in order to improve the speed of equipment fault diagnosis. It proves that BARO is superior to Apriori algorithm in equipment fault diagnosis of efficiency and mining speed by a concrete example.
Design of Temperature Monitoring Network Based on CC1110 Wireless Microcontroller
Authors: Wang Fang , Tang Gui , Zhu Jie
Published: August 2011

In order to realize the special circumstances of the real-time monitoring of temperature parameters, this paper presents a wireless temperature monitoring network program based on integrated temperature sensor of CC1110 chip. Wireless node using TI's wireless communication module CC1110, using integrated temperature sensor of CC1110 chip for temperature acquisition, through appropriate software control and display, to achieve the real-time monitoring of the temperature parameters on the special circumstances.
The Study on the Philosophy of Green Design in Modern Design
Authors: Yan Ru Shan
Published: August 2011

Green Design, as an advanced designing thought, is a design progress that takes the protection of environment and resources as the core philosophy. Nowadays, the global economy develops rapidly, and the material civilization of human beings has reached an unprecedented level, yet we have to face a series of serious consequences caused by the ignorance of the impact of environment, resources and misunderstanding of the concept “Green Design”. This paper will explore the different cognition on “Green Design”, expound what is real “Green Design” and reexamine modern design, and hope that the design will play an important role in the allocation of resources and energy.
Research on the Building Technology of Raw Soil Composite Wall Structure
Authors: Yang Shao Hua , Zhang Yin , Lu Jun Long , Zhu Jia Yang
Published: August 2011

The clods of dirt are filled within reinforced concrete frame space, which composes raw soil composite wall. This structure has the advantages of lightweight, high strength, ecological and energy-saving and so on. In order to study the key building technology of raw soil composite wall’s structure, this paper analyzes and investigates from the structural materials, wall production and its connecting structure method, and has produced raw soil composite wall structure’s construction technology and relevant quality requirement, which provides the reference for the engineering application about the raw soil composite wall.
A Study of RTE Structural Packaging Design
Authors: Panyarjun Oranis , Olarikabutr Thitima
Published: August 2011

Packaging plays an important role in decreasing the environmental impact and, simultaneously, improving well-being and safety of people. Due to a lack of time, ready-to-eat meal (RTE) offers more convenience choice to consumers than buying all ingredients and cooking at home. Thermoforming containers for RTE meals provides many packaging benefits such as protection and preservation, shelf life expansion, good appearance for display at point of purchase, convenience during transport and usage. However, thermoforming trays are made of plastic materials and are disposable packaging. This research project focuses on three parts: the study of the relationship between RTE food attributes and the structural packaging characteristics, the analysis of existing thermoforming structural design, and the synthesis of a new approach which takes the environmental impact into account for RTE packaging structures. The purposes of this research are (1) to investigate the technical design problems for these package’s structural characteristics by a thermoforming method, (2) to quantify the food packaging characteristics in relation to product attributes by using the perceptual mapping, as well as (3) to formulate a design guideline for the structural packaging characteristics which incorporates with the criterion of the environmental concern.
The Simulation and Comparative Analysis of the Different Structure of Cyclone Separator, and the Construction of Optimal Experimental Model
Authors: Xu Ning , Xu Yue
Published: August 2011

Cyclone separator has been widely used in power, chemical engineering, etc and has been one of the most accepted separators for gas-solid. To obtain the optimal experimental model, the flow field and particles trajectory from different structure of cyclone separator were simulated and compared using RNG κ-ε model in FLUNT software. Then the optimal experimental model was obtained. Furthermore, the velocity and pressure in this model was simulated and analyzed. This optimal experimental model might provide basis for further designing effective and low-power-consumption cyclone separator.
Research on Flow Characteristics of Aerostatic Circular Thrust Bearing with a Cone Cavity
Authors: Chen Long Xing , Ma Wen Qi , Yu He Chun , Liu Hai Yan , Du Hong Wang
Published: August 2011

The aerostatic circular thrust bearing was taken as a study subject. The numerical simulation method was used to calculate the flow passage. Meanwhile, the single-point testing method was used to test the pressure distribution. The simulation and experiment measurement results were compared and analyzed. The results show that: The single-point testing method is effective to capture the change of flow characteristics. The overall results of simulation and testing coincide with each other well. In the range of cone cavity, the flow pattern for the gas is turbulent flow, and the flow field should be divided into different zones for simulation.
The Efficiency and Experimental Investigation of Differential Gear Train
Authors: Zhou Chun Guo , Wang Hui Wu , Ma Chao Feng , Guo Yan
Published: August 2011

According to derive the efficiency formula of 2K-H differential gear train, the direction of meshing power has been determined. The test bench of fear train combination and structure analysis has been used to experimentation. The test results of various rotational speeds and torques have been collected by the dynamic load simulation loading. Through analyzing the test data, the efficiency formula of differential gear and its relationship with the dynamic load have been demonstrated. The results of experiment have been provided to experimental identification for the theories research
Dynamic Characteristics Analysis of Abnormal Vibration for Power Assembly of Diesel Engine of SUV
Authors: Meng Hao Dong , Li Shun Ming , Bai Ying
Published: August 2011

With regard to the problem of abnormal vibration for power assembly of diesel engine of the Sport Utility Vehicle in working rotation speed conditions, the method of test mode combined finite element simulation analysis was adopted, the dynamic characteristics of the power assembly were studied in all conditions. First vibration modal testing of the power assembly was carried out in whole vehicle condition and in test bed, the cause of abnormal vibration of the power assembly was found out, the bending stiffness was low, then a kind of actual finite element simulation model of the power assembly was set up, the constraint mode was calculated. The rationality of finite element simulation model of the power assembly was validated. Integrated modal testing and simulation analysis showed that the low stiffness of flywheel shell led to the low first modal frequency of power assembly which was easily in the excitation frequency range of diesel engine working rotational speed, and resulted in system resonance of the power assembly
Trajectory Performances Test for Arc Welding Robot Based on the Non-Contact Laser Tracing Measurement Technology
Authors: Zhang Xiao Jin , Li Jia , Zhu Si Jun , Zhang Yu
Published: August 2011

The aim of this paper is to test the trajectory precision of the execution terminal of the industrial robot based on a non-contact laser tracing measurement technique. The target is found in terms of tracing mirror attached in measurement position. This method utilizes the linear motion units and photo detection units to trace the target actively. The measurement of the target coordinates are measured with the laser interferometer linear measurement module and the grating ruler. This system can achieve the trajectory measurement of the planar motion objects without contact in real-time condition and also possesses the high precision. The experimental work and calculation were performed in order to achieve the trajectory precision of the research.
Research of a Robot Upper Limb and it’s Pneumatic Balance Design
Authors: Wang Chuan Jiang , Fan Bing Hui , Sun Xiu Juan , Jiang Hao , Zhang Zhi Xian
Published: August 2011

In order to meet the demands for dextrous robotic limbs in such fields as the dangerous rescue, the disabled people assistance, and the industrial production line, we carry out the research about a robot upper limb which is composed of 6 DOFs and has the ability of finishing complex movements instead of a real upper limb. A virtual prototype of the robot upper limb is designed for analyzing the system comprehensively, and an optimal pneumatic balance design is studied for the sake of decreasing the output torque and the dimensions of the robot upper limb. Meanwhile, simulation experiments for the limb with pneumatic balance design and without pneumatic balance design have been finished, and the results showed that the performance of the limb with pneumatic balance design is better.
Development and Experiment of Wall-Climbing Caterpillar Robot
Authors: Wang Kun , Wang Wei , Zhang Hou Xiang
Published: August 2011

In order to demonstrate the validity and the benefit of the closed-chain kinematics of four-link motional method for the gait of wall-climbing caterpillar robot, the mathematical model and the relation of kinematical parameters were built. The caterpillar robot can climb on vertical wall by coordinated rotation of one active joint and three passive joints. To testify the availability of the closed-chain kinematics of four-link method, a prototype of wall-climbing caterpillar robot with three kinds of adhesion modules was designed. A successful wall-climbing experiment confirms the principles of the closed-chain kinematics. The results show that the basis for selecting driving joints was reasonable and that the adhesion module can produce powerful adsorption force with small weight and volume to ensure the safety and reliability of wall-climbing.
A Master Model Approach to Multidisciplinary Design and Simulation for Compressor Blisk
Authors: Ji Jun , Zhang Ding Hua , Li Shan , Chen Bing
Published: August 2011

Multidisciplinary design and simulation is a very effective process to balance the different discipline design requirements and gain the optimal design result. The paper proposes a master model approach in order to maintain the model associativity and consistency in multidisciplinary design and simulation for compressor blisk. The research presents a master model-centered model structure, which is composed of master model, context model and application model. In the proposed master model-based multidisciplinary design and simulation process, master model is the kernel model and shared by each discipline. In addition, there is an associative relationship among these models. Then, the paper studies the modeling method for the master model of blisk and the model mapping and associativity maintaining method for multidisciplinary design and simulation. A series of computation results demonstrate the performance of the proposed approach.
Study the Movement Characteristic of a Closed DISCO CVT
Authors: Liu Kai Chang , Xie Guan Ru , Wu Yun Jie
Published: August 2011

This paper describes the basic structure and driving principle of the closed Planetary Bevel-type CVT, and the characteristics of minus differential gear-train is applied to combine DISCO CVT with the differential gear-train. Several major structural forms combined the DISCO CVT are listed, and analyze its movement, power flow and calculate its efficiency. The feasibility and superiority of this idea is proved.
The Comparative Study on Less Tooth Differenced Teeth Profile of High Precision FA Pin-Cycloid Gear Transmission
Authors: Guan Tian Min , Xuan Liang , Lei Lei
Published: August 2011

In High precision FA type pin-cycloid gear transmission, carrying capacity has always been sacrificed by using one tooth differenced of "Arch Back Teeth Profile" to achieve high precision transmission. Compared with one tooth differenced transmission, two teeth differenced transmission can have more teeth meshing at the same time, namely can have better carrying capacity than one tooth differenced. In order to simultaneously satisfy high-precision transmission and high bearing capacity, this paper do a comparative study on two kinds of less teeth differenced FA pin-cycloidtransmission.Through theoretical analysis, programming one type model calculated two kinds of teeth differenced cases geometric relative rotated angle, the tooth surface contact force and contact stress. Then do a comparative study and analysisaccording to the calculated results.
Application and Research of Modern Design Method on the Detective Vehicle for Straddle Type Monorail
Authors: Wang Hao , Ren Guang Sheng
Published: August 2011

This paper discusses the function of modern design method in the scheme design process of the detective vehicle for straddle type monorail. Meanwhile, the flows of function division method and how to apply it are analyzed in detail. Finally, the most appropriate scheme is chosen after comparing all the possible schemes. At one time, the useful exploration of modernization, regularization and hierarchy of similar products has been made.
Properties of Light Sources under Mesopic Vision
Authors: Yang Yong , Wang Lei , Li Wei
Published: August 2011

The mesopic vision theory is used to study illumination properties of series of light sources, through the test of luminous spectrum and derivation based on the MOVE model, the results show that spectral luminous efficiency function Vmes(λ) is between traditional V(λ) and V′(λ) when the background brightness under mesopic vision condition, and the function of Vmes(λ) is changed with the different of light sources and background brightness. Based on human visual perception, the mesopic vision equivalent brightness can be calculated, which of HPS is lower than test brightness corrected by V(λ), but white LEDs and FL show opposite phenomena, and the different value between mesopic and photopic brightness presents reduce trend with rising of background brightness.
Simulation Study of the Whole Process of Collapse and Collision of a Large-Span Steel Single-Layer Lattice Structure
Authors: An Dong Ya , Li Cheng Ming
Published: August 2011

The project Expo Axis is one of the landmark buildings of Expo Shanghai 2010, and its structural safety depends largely on the security of the six Sun Valleys, which are the important components of the Expo Axis. The simulation of the whole process of collapse and collision of the sun valley under earthquake action is conducted in this article. In the calculation multiple nonlinear factors are taken into account, such as material nonlinearity, large displacement effect, self-contact collision among the structure members, contact collision between the structure and the ground, etc. Through analyzing the results, a reasonable assessment of the structure of Sun Valley’s performance under the supper-large earthquake is given out. This method can also offer reference to other similar large-span steel single-layer lattice structure’s performance analysis.
Development Platform for Automotive System Base on VC++ and ADAMS/Car
Authors: Yang Bo , Sun Hu
Published: August 2011

To speed up the virtual development of the automobile, Using VC++6.0 programming environment and the function of ADAMS could execute the batch files; the simulation and analysis of automotive system are developed. A friendly convenient and the flexible man-machine conversation interface are developed by VC++ foreground. The parameters input by users and ADAMS operating commands are encapsulated in acar.cmd file. ADAMS will automatically calculate and simulate after executing the acar.cmd file. It can be showed that this program will improve the study and quicken the design of vehicle progress greatly.
Niche Differential Evolution Algorithm and its Application in Multimodal Function Optimization
Authors: Li Na , Li Yuan Xiang , Huang Zhi Guo , Wang Yong
Published: August 2011

In multimodal optimization, the original differential evolution algorithm is easy to duplicate and miss points of the optimal value. To solve this problem, a modified differential evolution algorithm, called niche differential evolution (NDE), is proposed. In the algorithm, the basic differential evolution algorithm is improved based on the niche technology. The rationality to construct the proposed algorithm is discussed. Shubert function, a representative multimodal optimization problem is used to verify the algorithm. The results show that the proposed algorithm can find all global optimum points quickly without strict request for parameters, so it is a good approach to find all global optimum points for multimodal functions.
Model Predictive Control of Filament Tension in Textile Winding Process
Authors: Li Feng Ling , Xu Meng , Liu Hui
Published: August 2011

Abstract. Yarn tension controlling at heart is tuning servo-motor speed on a restricted range. In this paper, we proposed an advanced model predictive control strategy to solving filament winding system time-delay problem. The application of controlled auto-regressive integrated moving-average (CARIMA) model was described the dynamic time-varying character. The parameters of CARIMA model were solved by recursive least squares parameter estimation method through input-output data. And using the receding optimization method acquire controlling amount in the future. The result of simulation shows that the method is effective and the control structure is simple.
Brick Kiln Stacking-Destacking Robot Mechanism Design and Kinematics Analysis
Authors: Zhang Zheng Tao , Liao Xiao Bo
Published: August 2011

This article describes the mechanical structure design method of the stacking-destacking robot and puts forward part kinematics analysis. In accordance with the actual technology requirement of modern brick kiln companies in logistics automation industry, a universal stacking-destacking robot is designed based on the functional requirement. And depending on the actual production requirements of the robot, it is designed to a kind of five-dof cylindrical coordinate one. This thesis focuses on the design and analysis of the mechanical structure of the robot. And according to the production requirements, some important components are selected. Finally, the kinematics analysis of the robot was brought forward and they are verified by experiments. The results show that this robot we designed can completely satisfy the technical requirements of the work in brick kilns destacking.
Microstructural Observation of SiC Surface Alloyed Carbon Steel
Authors: Guo Chang Qing
Published: August 2011

EPS (expanded polystyrene spheres) template with a 5 mm coating on a surface that is mainly consisted of SiC particles are prepared. Carbon steels are then poured in the templates using V-EPC (Vacuum Expandable Pattern Casting) process. The microstructures are observed and analyzed using optical microscope, SEM and EDS. Macrostructural observation showed that the surface alloyed zone is dense and there are no obvious defects, such as gas bubbles, occluded gas holes and delimitation. Microstructural investigations indicated that the samples from top to bottom are obviously consisted of three different layers, i.e., the surface compound layer, the interim transitional layer and the bottom matrix layer. SiC particles are totally decomposed during infiltration. The microstructures in the surface compound layer are consisted of a large amount of graphite flakes, carbides, Si rich ferrites and dendritic pearlites. There is a fine pearlite strip at the top of the transitional layer and small amounts of carbide particles within the matrix grains and net carbides at the grain boundaries can be also observed in this layer.
Key Technology of Refined Cotton Centrifuge Unloading
Authors: Wang Wei Hui , Zhang Liang Dong , Hu Guang Zhong , Zhou Min
Published: August 2011

On the basis of studying the principle of centrifugal dewatering technology applied to refined cotton, the paper analyzes the key technologies of screen plugging and pushing resistance concerning problems of cotton fiber blocking screen stencil and impracticality of pushing when refined cotton is tested on P-60 centrifuge, in combination with refined cotton’s properties. Besides, measures of improvement are proposed as to the design of the centrifuge’s main components’ structures, which lays a good foundation for further development of refined cotton centrifuge.
Research of Usability Testing Method of Mobile Phone
Authors: Tang Chao Lan , Yang Xian
Published: August 2011

Usability testing is an important usability practice to evaluate a product by testing it on users. In this paper, the essentiality and particularity of mobile phone usability testing are analyzed, and the limitation of applying the traditional usability testing method to the mobile phone usability testing is explained. On this basis, an effective usability testing method specialized for mobile phone is pointed out, it gives solutions to two problems in mobile phone testing, i.e. testing in the real environment and real-time monitoring users’ all reaction such as operation, expression and etc.
Expression Regulation of Design Process Gene in Product Design
Authors: Li Bo , Tong Shu Rong , Fang Lu Sheng , Liu Jin Chao
Published: August 2011

To improve the design process efficiency, this paper proposes the principle and methodology that design process gene controls the characteristics of design process under the framework of design process reuse and optimization based on design process gene. First, the concept of design process gene is proposed and analyzed, as well as its three categories i.e., the operator gene, the structural gene and the regulator gene. Second, the trigger mechanism that design objectives and constraints trigger the operator gene is constructed. Third, the expression principle of structural gene is analyzed with the example of design management gene. Last, the regulation mode that the regulator gene regulates the expression of the structural gene is established and it is illustrated by taking the design process management gene as an example.
Conceptual Book Design’s Morphosemantic Meaning and its Expression
Authors: Wang Min
Published: August 2011

Book design is carried out and elaborated within a space of compact size and limited storage amount. It is not easy to accomplish a novel attractive book design, as innovation is required and connotation of books should be embodied. Especially when faced with the impact from electronic media, we have difficulty designing a book with a strong material sense and rich space and time association if we continue to design a book using single thought for publishment without the sense updating. Conceptual book design, based on the traditional books, is an attempt to seek a new morphological book form which fully incarnates the personality and connotation of a book and seeks to display the possibilities of the book contents. This paper mainly explores the morphosemantic meaning in conceptual book design and expounds features and expressions of morph morphosemantic of conceptual books, in order to contribute to the development of book design.
Ergnomic Design of Computer Keyboard Base on the Finger Workspace Analysis
Authors: Cui Jian Kun
Published: August 2011

Frequently wiggle of wrists is the primary cause of muscle fatigue and occupational diseases in the computer keyboard operation. It is revealed that the wiggle of wrist is caused by the workspace limit of finger tip. Based on the movement study and workspace analysis for human finger, a new type of computer keyboard designed with ergonomic consideration is put out. A tilting keyboard is used in the new configuration to fit the shape of finger workspace. It was approved by experiment that the new keyboard could reduce the rotation of wrist obviously, therefore to improve the comfort and avoid disorder of the wrist during operation.
Preliminary Study on Innovative Mechanical Design Method Classification
Authors: Cui Yu Lian , Zhang Bing Xi , Song Zhong Kang
Published: August 2011

Innovative mechanical design methods are categorized and analyzed briefly in this paper, which include the common used creative design methods for mechanical systems, mechanisms and mechanical structures. And the applications of these methods are illustrated with examples.
Innovative Design and Analysis on Bicycle Driving Mechanism
Authors: Bu Yun Feng , Wang Wen Zhi , Hou Zhi Wei , Cao Su Qun
Published: August 2011

The traditional sprocket wheel mechanism is substituted by the planar four-bar linkages in the transmission system of the bycycle, based on the lever. The results indicate that the novel design has a creative structure with higher energy transferring efficiency by particular method. A novel design and concept are explored for improving of the driving technique of bicycle. Due to its small motion range, the new mechanism can be applied in both the traditional bycycle special for the handicapped and in the design of the vehicles, yacht for the sightseeing.
Numerical Simulation of Spray Process of Fuel Nozzle
Authors: Xu Rang Shu , Lin Rui , Zhang Suo Gang , Zhou Ting Chu , Bai Min Li
Published: August 2011

Control of exhaust emission and combustion efficiency depend directly on the atomization of the liquid. The research on the atomizing performance of fuel nozzle is certainly important. A model using VOF-LES method has been built to investigate sheet breakup behavior of the main circuit of a pressure swirl atomizer. LES which takes into account of turbulence of fuel and air, has been used to simulate the phenomenon of sheet breakup. Vivid gas-liquid interface, instability wave and primary breakup phenomenon have been captured. The patterns of the sheet breaking-up change with different fuel flux. The mechanism of sheet breakup has been analyzed by combining variations of velocity and turbulent kinetic energy with Kelvin-Helmholtz instability theory and turbulence on circumference. The breakup length captured by simulation agrees well with the results of the semi-empirical formulas.
An Attention Target Detection Method Based on Dynamic Saliency Map
Authors: Ke Hong Chang , Wang Hui , Li Hong Yu
Published: August 2011

Thinking of the characteristics of the human visual system, proposed a target detection model of attention mechanism which was based on dynamic saliency map. This method improved classical visual attention calculation model, extracted the static characteristics of intensity, color and orientation, and selected different parameters to fuse into a static saliency map which was based on different target on scenarios. Using differential filter method to extract the dynamic features of two images, and fused different scales feature maps into the dynamic saliency map. At the end, with modified factor modify two saliency map, and fused into the basic image with which detected the moving targets. This method simulated human’s attention mechanism, extracted different scales features with strong processing and analysis capacity. Experimental results show that the method can quickly and accurately detect moving target, can effectively meet the single target detection and multi-target detection.
Simulation of Fuzzy Auto-Tuning PID Control Based on MATLAB
Authors: Chen Jian Wen , Li Lei , Song Jin Chun , He Zhan Jun
Published: August 2011

In CNC machine tools servo feed system, there are many uncertain parameters, it is difficult to establish accurate mathematical model of the Servo feed system. The parameters of conventional PID controller can’t adjust immediately to the controlled object. Fuzzy PID controller [1], which has the advantages of conventional PID control and fuzzy control, can solve these problems. We apply it in numerical control machine servo feed system. The simulation in MATLAB shows that the fuzzy auto-tuning PID controller improve the dynamic performance of the servo feed system and has better robustness.
Topology Optimization of Electric Vehicle Body in White Based on SIMP Method
Authors: Yang Shu , Qi Chang , Hu Ping , Wei Zhi Yong , Wang Ying Li
Published: August 2011

Based on Solid Isotropic Microstructure with Penalization (SIMP) method, a mathematical model for topology optimization of EV is proposed, which has design objective as minimizing compliance, with volumetric and geometric constraints. To make results more engineering value, the BIW optimization of EV takes into account not only the static loads, but also the torsion load in turning and moment load in braking process of EV. A number of implementation aspects in solving the numerical instability problem generated in optimization process are discussed, including checkboard patterns and mesh-dependency. Topology optimization of EV body in white with geometry and volumetric constraints is conducted, showing effectiveness of the proposed model.
Study on General Total Stiffness Matrix of Plane Multi-Storied Truss
Authors: Yang Cai Hong , Yang Shi Ming , Hou Yun Lei
Published: August 2011

This paper proposes a new description method of truss structure based on adjacent matrix and the expression of element stiffness matrix (ESM) containing the joint number. Furthermore a procedure is also given for obtaining a general total stiffness matrix (GTSM) by using the method of large domain transformation matrix (LDTM). GTSM can reduce the difficulty in designing variable geometry trusses.
Research for Predicting the Underwater Acoustic Performance of Sandwich Structural Composite Based on Support Vector Machine
Authors: Li Yong Qing , Zhu Xi , Xu Fang
Published: August 2011

Support vector machine(SVM) is a new learning machine based on the statistical learning theory. For it not only has solid theory, but also can solve many practical problems in optimizing area, such as small samples, over learning, high dimension and local minima. And has shown attractive potential and promising performance in a wide range of fields and applications. In this paper, the least square support vector machine(LS-SVM), which developed from normal SVM, has been used for predicting and modeling the underwater acoustic performance of sandwich composite plates, which were composed of fiber-reinforced plastics/acoustic rubber/fiber-reinforced plastics. Effective result indicate that LS-SVM is of potential application in sandwich structural composite design and acoustic material research.
Synthesis of Chiral Amphiphilic Graft Copolymer PBTQMO-g-MPEO
Authors: Zhou Yong , Hu Zhi Guo
Published: August 2011

A new optically active amphiphilic graft copolymer bearing quinine pendants poly[3,3-bis(triazolyl-L-quinine) methyl oxetane]-g-poly(ethylene oxide) (PBTQMO-g-MPEO) was synthesized by ‘‘click’’ reaction of azido-modified PBAMO-g-MPEO diblock copolymer and 10,11-didehydro quinine. The fourier transform infrared spectrum(FTIR) and 1H nuclear magnetic resonance spectroscopy (1HNMR) were used to confirm its structure and composition.
Prepared and Infrared Extinction Characteristics of Micron Expanded Graphite
Authors: Ba Shu Hong , Jiang Chun Hong , Sun Kang Bo , Sun Zhen Xing
Published: August 2011

The micron expanded graphite is prepared by the method of chemical oxidation. Sulfuric acid and ice acetic acid are used as inserting reagent, potassium dichromate is used as an oxidizing agent. The optimum mass ratio is as follows: mC: mH2SO4:mCH3COOH:mK2CrO7=1:5:3:0.5. The reaction time is 60 min and the temperature is at room temperature. The measured result of FTIR, SEM and Laser Particle Size Analyzer show that target product is successfully prepared. Its expanded volume is up to 8.0mlg-1. At the same time, the static and dynamic infrared extinction properties of micron expanded graphite are measured. Results show that the micron expanded graphite has stronger Infrared extinction ability than the raw graphite. The cause is that the surface of micron expanded graphite has some open or semi-open small holes which can obviously absorb infrared radiation.
Preparation and Characterization of Copper Oxide and Copper Nanoparticles
Authors: Lv Jun Jun , Li Ming Yu , Zeng Qing Xuan
Published: August 2011

Copper oxide was prepared via the calcination of copper oxalate precursor. By using high-temperature solvent method, the precursor decomposed under nitrogen atmosphere and copper nanoparticles were obtained. The microstructure and properties of the products were characterized by scanning electron microscopy, X-ray diffraction, UV-Vis spectroscopy, Fourier transform infrared spectroscopy and other analysis methods. The results show that the obtained copper oxide is constructed by nanoparticles. The sample is porous and has a good catalytic activity. Three copper samples were obtained by controlling the reaction time. The particle size of the samples was calculated to be about 44.3 nm, 17.1 nm and 9.9 nm respectively.
Quenching Temperature‘s Impact on the Microstructure and Mechanical Properties of X80 Pipeline Steel
Authors: Ma Yong Jie , Liu Xi Lu , Zhang Guang Liang
Published: August 2011

The state study on mechanical properties’ changes of X80 steel at different quenching temperature. The results showed that the quenching temperature is 1000 °C, X80 Austenite grain coarsening is serious, leading to the production of coarse lath bainite ferrite, resulting in increased strength of X80 steel, toughness and hardness of a serious reduction; When the quenching temperature is 930 °C, and assisted by the appropriate temperatures, can make the X80 steel the small needle-like ferrite-based organizations, to obtain good hardness, strength, ductility and toughness of the match.
Study on Clean Production Technologies of Electrolysis Manganese Passivation
Authors: Fan Bin , He Guo Wei , Liu Ling Hui , Wang Jing Xin
Published: August 2011

The passivator of potassium dichromate is one of the main electrolysis manganese passivation technologies in China. The biggest problem of hexavalent chromium passivation is chromium emission. The end-pipe treatment of Cr-containing effluents can be understood as detoxification and precipitation. Here the highly toxicity Cr(Ⅵ) is reduced to low toxicity Cr(Ⅲ) . In alkaline conditions, Cr (Ⅲ)is precipitated in the type of chromium hydroxide and produce chromium residue. The landfill of Chromium residue is a big problem to environment safety. The measures of clean process were reviewed around with emission reduction of Cr.
Diffusion Bonding between AZ91 Magnesium Alloy and 7075 Aluminum Alloy
Authors: Lin Fei , Li Tie Peng , Yu Qian , Sun Lu Lu , Meng Qing Sen
Published: August 2011

In the present investigation, AZ91 magnesium alloy was vacuum diffusion bonded to a 7075 aluminum alloy. The effects of the welding temperature and holding time on the joint shear strength are investigated with the help of electron microscopy, micro-hardness and electronic universal testing machine. It is shown that in certain extent, the welding temperature and holding time have great effect on the joint shear strength. The maximum of joint shear strength is obtained and the width of diffusion layer is 34.36μm with the bonding temperature being 470°C and the holding time reaching 60min.
Study on CAD Modeling Based on Feature Extraction
Authors: Hui Xiang Jun , Cheng Ping
Published: August 2011

In this paper , key techniques of feature extraction in reverse engineering is studied. First use a method to extract the feature points from scattered points based on Gauss curvature extreme point. Use these feature points to make cloud data segmentation. Then quadric surface feature and free-form surface feature can be separated. The quadric surface feature can be fitted by quadric surface parameter equation with LSM directly. However the free-form surface feature should be extracted based on section feature recognition. This method has several steps: First ,a adaptive slicing algorithm is used to get section data from point data . Then feature points from section data is extracted. And these feature points are regarded as the gist to recognize section feature. When the section feature is recognized, they should be fitted with LSM, and then skinning method is used to reconstruct free-form surface modeling.
Research on Techniques of Electro Less Nickel Plating Nano-C60 Crystals on the Surface of Micromechanical Devices by Laser-Induced Way
Authors: Zhong Liang , Hou Li , Liu Chuan Hui , Ying Qin
Published: August 2011

In order to improve the dispersion performance of nano-C60 crystals, the surface metallization was achieved by electro less nickel plating; By the laser-induced way, a new composite coating was got on a micromechanical device, which contained some metalized nano-C60 crystals. Research on the fretting friction and wear behavior of the composite coating, its ability of Wear Resistance were improved evidently.
Optimization Design of Large-Diameter Non-Rectangular Sectional Ring Blank for Ring Rolling
Authors: Wang Lei Gang , Zhang Yi Feng , Ma Hong
Published: August 2011

Because of the defects of instability and radial shrinking-drawing of outer surface during rolling large-scale non-rectangular sectional ring, based on blank design principles, the method of subsection determining size of blank first, and then find intersection was proposed, which obtained the optimum size rang of large-diameter and non-rectangular sectional ring blank. With specific examples, using the finite element simulation and actual production, the feasibility of the method was verified.
Optimization of the Disc Cutter Structure Parameters Based on Genetic Algorithm
Authors: Xia Yi Min , Liu Wen Hua , Xue Jing , Wu Yuan , Zhang Xin Ming
Published: August 2011

In the process of shield tunneling construction, the energy consumption is a prominent issue. The disc cutter blade angle, blade tip width and corner radius are taken as design variables, and the minimum cutting special energy consumption as the target, the structural parameter optimization model of disc cutter is established. Genetic algorithm (GA) is used in the mathematical model, and the optimal solution is shown: the disc cutter blade angle is 26°, the blade tip width is 8 mm, and the corner radius is 5 mm. Compared to the actual construction data, the results are satisfactory.