bluuebunny/crossref_metadata_2025 huggingface dataset:
Experimental Verification of Stick–slip Motion between Two Rolling Contact Surfaces
Authors: Zhang Nong , Zhang Jin , Wang Yu
Published: May 2011

In this paper, a simplified drive train model with stick-slip nonlinearity is introduced for the study of stick-slip motion between the driving tires and the flywheel. Laboratory based tests are designed to investigate stick-slip motion of the tires contacting with the flywheels which simulate vehicle inertia. A description of the powertrain test rig, the associated instrumentation, the test inputs and operation conditions are provided. The experimental results are similar to those obtained from the numerical analysis using the introduced drive train model. They verify the validity of the stick-slip model, and demonstrate that stick-slip occurred frequently between the driving tires and the flywheels. The normal tire force applied to the flywheel is one of the key parameters affecting stick-slip motion. And there exists an upper limit beyond which the tire and flywheel will stick together at all time. It is found that the frequency of stick-slip motion is independent of normal tire force and is close to the natural frequency of the tire-flywheel contacting power transmitting system.
Research on Experiments about Inverted Arch CFRP Reinforced RC Beam
Authors: Wang Yu , Liang Yin , Liu Fan Chun , Wang Lin
Published: May 2011

In this paper, we tested the two points loading flexural performance of inverted arch CFRP reinforced RC beam with practical experiments, and contrastively analyzed the limit bearing capacity, deflection under loading, strain, cracking load, crack width and spacing between directly bonded CFRP reinforced RC beam and inverted arch CFRP reinforced RC beam. Then we explored an RC beam strengthen method with good reinforcement effect and good economy and which can be easily applied in practical constructions.
Research on the Temperature Control System Based on the Pan-Boolean Algebra PID Controller
Authors: Jiang Wei , Li Jiang Lan , Zhang Jian
Published: May 2011

The temperature control system is increasingly playing an important role in industrial production. Recently, lots of research have been investigated for the temperature control system based on various control strategies. The temperature control system based on the Pan-Boolean algebra PID is proposed in this paper. The new algorithm based on the Pan-Boolean algebra PID can improve the performance of the system. Also, it’s fit for the complicated variable temperature control system. The simulation results show that the validity of the proposed strategy is more effective to control temperature.
Research on Active Suspension System Based on BP and RBF Network Algorithm
Authors: Tang Chuan Yin , Zhao Guang Yao , Zhang Yi Min , E Xiao Yu
Published: May 2011

A six degrees of freedom half body vehicle suspension system is presented in the paper .The Back Propagation neural network algorithm and the Radial-Basis Function network algorithm is adopted to control the suspension system. With the aid of software Matlab/Simulink , the simulation model is obtained. A great deal of simulation work is done. Simulation results demonstrate that both the designed radius basis function neural network and the back propagation neural network work well for the proposed vehicle suspension model in the paper .
A Structure Safety Assessment Method for Overhead Traveling Crane Based on Accident Tree Analysis
Authors: Xu Ge Ning , Xin Yu Peng , Lu Feng Yi
Published: May 2011

Aiming at security problem of metal structure of overhead traveling crane, the accident tree is established based on Accident Tree Analysis to further study. The solution of minimizing cut sets and least path sets are obtained by accident tree calculating. Finally several possible measures to prevent structural faults are obtained through final results of the calculation analysis.
Study and Design of Chromium Ore Smelting Reduction Process for Producing Stainless Steel in a Converter
Authors: Liu Yan , Jiang Mao Fa , Wang De Yong
Published: May 2011

This paper describes the concept of the construction of steelmaking shop, which is carried out as part of a modernization plan aimed at creating a 21st century environmental-friendly iron and steel works, designs the smelting reduction process of producing stainless steel crude melts in a 150 t converter and presents an outline of the equipment specifications and the conditions of operation, according to the blowing conditions of 185 t smelting reduction converter of No.4 steelmaking shop in Chiba Works of JFE Steel. In the future, a rational production system will be constructed by flexible selection of raw materials in response to changing stainless steel raw material prices and further improvement in productivity and quality, making the maximum use of functions of the equipment.
Study on Quick Testing Instrument for Automobile Fuel Consumption
Authors: Fu Bai Xue , Hu Sheng Hai
Published: May 2011

Sensor technology and computer control technology are applied to automobile fuel consumption testing in the automobile industry developed countries, the function and precision of the test are developing and perfecting continually. In our country, automobile fuel consumption test mainly applies ordinary consumption test devices, that test item are single-chip, which is applied for testing the flow of time. The display of method mainly based on the pointer instrument and partially on circuit control, so the maintenance and reliability of the test does not excellent. We do research and develop the intelligent one which is called quick testing instrument for automobile fuel consumption, which applies sensor technology, computer control technology and advanced instrument technology, that can be applied for the testing for automobile fuel consumption and data show. It can improve the measurement precision of automobile fuel consumption and degree of automation, with the down cost as high cost-effective consequences. The test instrument can be used for testing instantaneous fuel consumption, average fuel consumption and accumulative total consumption of gasoline engine and diesel engine.
The Development and Innovation of Yunnan Clay Handicraft Base on the FreeForm System
Authors: Li Jing Yuan , Xu Ren Ping , Wang Kun Qian , Hu Rui Bo
Published: May 2011

Yunnan Clay handicraft is one of the treasures in Chinese ethnic cultural heritage. It is of great value to inherit and innovate the study. This article first introduces the basic principles and application methods of FreeForm, then takes Tile cat for instance to present the detail designing process using FreeForm, next discusses the how to resolve the peculiarity of developing Yunnan Clay handicraft, such as nationality, artistic quality, personalization of consumer, and last demostrates the great role FreeForm plays in the Yunnan Clay handicraft’s advance.
An Experimental Study on Processing Performance of Rotary Ultrasonic Drilling of K9 Glass
Authors: Zhang Cheng Long , Feng Ping Fa , Wu Zhi Jun , Yu Ding Wen
Published: May 2011

Rotary ultrasonic machining process, regarded as one of the effective processing methods for hard-brittle materials, is introduced into drilling K9 glass in this paper. The effective cutting velocity, cutting depth, and cutting length of single diamond particle are determined by analyzing the kinematics characteristic of diamond tool in rotary ultrasonic drilling (RUD). Experiments are conducted to study the influences of process variables (spindle speed, feedrate) on cutting force, chipping size, and surface roughness in RUD. As comparison study, the processing performances between RUD and diamond drilling are also discussed. The experimental results show that the RUD process can significantly reduce cutting force and the value of chippings size, which inferred that RUD process can improve machining efficiency and make the machining cost lower. It is also concluded that the effective cutting depth of diamond particles is the main factor for surface roughness in RUD of K9 glass.
The Responses of Jointed Rock Mass under Dynamic Loads
Authors: Zhu Zhe Ming
Published: May 2011

Joints can reflect and transmit stress waves, thus joints affect rock fracturing, and accordingly they could affect blasting efficiency. In this paper, numerical and experimental investigations have been implemented and the effect of joints on wave propagation and rock fracturing has been discussed. A dynamic numerical model of jointed rock mass has been established by using finite difference method. The simulation results show that as joints are parallel to wave propagation, the corresponding rock damage zones increase. Blasting experiments by using artificial joints have been carried out. Generally the experimental results agree with our numerical results.
The Effect of Defects on Rock Fracturing under Dynamic Loads
Authors: Zhu Zhe Ming
Published: May 2011

A surface blasting model of rock with pre-existing randomly distributed defects, including voids, pores and small open joints, under blasting loads are established by using finite difference method. A shock equation of state, obtained from the existing test results, is employed for the granite near the explosive charge, and for the granite far from the charge, a linear EOS is applied. The granite dynamic strengths, which increase with strain rate, are calculated based on the existing test results. The simulation results show that under blasting, most of cracks are initiated at the defect tips independently; the damage range increases as defect density decreases;spalling is easily happening near a free surface as there is a blasting near the surface.
Analysis on Pyrolytic Behavior of Bagasse Multifunctional Materials by Py-GC-MS
Authors: Qiao Jian Zheng , Wu Yi Qiang , Zeng Chao Feng , Peng Wan Xi
Published: May 2011

In order to learn of pyrolytic behavior of bagasse multifunctional materials, the extractives of bagasse biomass were adsorbed and determined by Py-GC-MS. And the main constituents were 1-phenanthrenecarboxylic acid,1,2,3,4,4a,9,10,10a-octahydro-1,4a-di methyl-7-(1-methylethyl)-( 37.99%), decanoic acid, 1,2,3-propanetriyl ester(5.73%), tridecane, 2-methyl-(5.09%), dodecanoic acid, 1-(hydroxymethyl) -1,2-ethanediyl ester(4.52%), stigmastan-3,5-diene(3.81%), glycine, furan-2-yl-methyl ester(3.45%), 1-hexacosene(2.18%), 1-docosene(2.08%), kaura-9(11),16-dien-18-oic acid, (4.alpha.)- (2.07%), etc.
The Reconfigurable Design of Stone Grinding Equipment
Authors: Wang Jing Kun , Shan Jin Feng , Li Jian Jun , Zhang Jin Sheng
Published: May 2011

Reconfigurable design is becoming more and more important in the product design. Based on the interchange and the assembled character of the module, module design is the main technology of carrying out reconfigurable design. Reconfigurable design system in this paper uses function and structure module, builds the virtual design floor to decompose and mapping the function and structure of the stone grinding equipment. Based on the equipment database created in Pro/Engineer software, this software can design, modify and assemble the module and the whole product according to the customer requirements. The application effect of this software is prefect.
A Study on the Principle of Interface Color Scheme for Visually Impaired People
Authors: Ma Si Yu , Wang Chen Sheng , He Xiu Qin
Published: May 2011

The use of color is of great significance to the appearance and usability of web interfaces. However, visually impaired people have always been ignored in web interface design in terms of color scheme. Therefore, it is necessary to study their difficulties while browsing web pages and accessing to information. By means of enumerating the color barriers, this paper summarizes the principles of how to use color in the web interface design for visually impaired people. It is expected that the proposed principles would benefit such people who conduct web interface design while being aware of the needs of visually impaired people.
Experimental Study on Size Effect of Plate Load Test in Roadbed Compaction Quality Detection
Authors: Li Xiao Yong , Xu Kang , Wang Si Yuan
Published: May 2011

There are three normal sizes of loading plate as 30 cm, 50 cm, 75 cm in roadbed compaction quality detection. The size effect rule for coefficient of foundation is obtained from the investigation on plate load test results by the experiment in lab. The laboratory test may control well the conditions by building the test section modeling the roadbed. The test section is 15 m by 5m. The diameters of loading plate used is 30cm, 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70cm and 75cm in the test. The regression equation between coefficients of foundation measured by different size of loading plate has been concluded. It is obtained that the ratio of coefficients of foundation between the plate of 50 cm and 30cm is 1.6 for granule filler, 1.65 for grind filler, and the one between the plate of 70 cm and 30cm is 2.17 for granule filler, 2.3 for grind filler.
The Effect and Experiment Research of Forming Angle on Internal Defect of Valve Roughcast Formed by Single Cross Wedge Rolling
Authors: Wang Xiao Fei , Zhang Kang Sheng , Liu Jin Ping , Hu Zheng Huan
Published: May 2011

Cross wedge rolling valve roughcast is charactered by minor diameter, long stretching and heavy section shrinkage; however, it is hard to select a set of suitable machining process parameter and prone to rolling internal defect. In order to research this problem, a whole forming process of valve roughcast by single cross wedge rolling is simulated with finite element simulation software DEFORM-3D 6.0, which focuses on the stress and strain of the center point of rolled piece under different forming angles. The rolling experiment under different forming angles was done on H500 rolling mill to calculate and analysis of the areas of the centre holes for each rolled piece. The influence of forming angle on internal defect is discovered by a method combining finite element simulation and experiments. At last, it is concluded that forming angle of 28°can improve the internal defect of valve roughcast formed by single cross wedge rolling.
The Effect and Application of Different Turbulence Models on the Design of Inertial Stage
Authors: Wang Zhong Yi , Han Jia , Sun Tao , Yu Yun Liang
Published: May 2011

The numerical simulation of the resistance characteristics of the inertial stage had been researched with different turbulence models, and the resistance characteristic computation curves of the inertial stage with different turbulence models have been obtained. Then curves contrasted with the actual value from experiments. The results show that the error of the Standard model is a little larger, but results of the RNG and Reynolds Stress are comparatively accurate. It has provided the reference frame of the turbulence model selection when the numerical simulation of the inertial stage is conducted.
The Comprehensive Evaluation of Regional Economic Development in Inner Mongolia
Authors: Li Peng , Ma Zhan Xin
Published: May 2011

The economic growth of Inner Mongolia has ranked first for several years since Western Development. In this paper, we establish a level indicator system for evaluating the level of Regional Economic Development from the following four aspects: economic scale, economic benefit, economic structure and quality of life. Then, we take the data of 2000 as sample data, and apply it to a DEA model based on panel data for evaluating the economic development of the twelve union cities from 2000 to 2009.By the analysis, Inner Mongolia's economic development can be divided into two levels: Erdos , Baotou, Hohhot, Alashan League and Wuhai have a higher level of economic development, Xilinguole League, Hulunbeier, Bayannaoer, Wulanchabu, Chifeng, Tongliao and Xingan League have a poor foundation , the overall development is not ideal.
Improvement of Stamping Forming Process and Design of Fully Automatic Die for Lipstick Casing Pipe
Authors: Zhang Chao Ge
Published: May 2011

According to its structure and dimension, the original stamping forming process of the lipstick casing pipe was analyzed. In view of such drawbacks as dispersed working procedures, lower efficiency and unstable product quality in the original manufacturing process, wall thickness of the lipstick casing pipe was modified and became thinner than its original size with the premise of ensuring utility performance. A new manufacturing process for the modified lipstick casing pipe was provided and a fully automatic stamping die, which is more secure in operation, lowers raw material expense and has higher production efficiency, was designed.
Creation Design of Cam Mechanism Based on Reverse Engineering
Authors: Wang Wei Dong
Published: May 2011

The importance of cam contour curve and the necessity of cam reverse engineering are discussed. The error sources during the course of cam reverse design are analyzed. The growth form innovative design method is researched, especially product structure growth form design method. The information of structure, dimension and tolerance should be perfected gradually during the course of growth form innovative design, and finally perfected when the product structure is finished, furthermore, using the current structure, dimension and tolerance information to conduct evaluation and control in the grow direction during the design process, to achieve the ultimate purpose of optimization design. Taken the innovative design of an precision cam as an example, the reconstruction of product structure and the product prototype reverse design are finished, and then the product is innovative designed. A practical designs technical ways based on growth form innovative design is systemly provided.
An Environmental Friendly Based Research on the Safety of Food Packing Materials
Authors: Gao Zhi Yong , Huang Zeng Guang
Published: May 2011

As environmental issues have become particular prominent, the theory of green designing has been a social consensus. Green packaging is definitely the future trend for the development of packaging industry. It is a significant step by deepening the people-oriented research on green packaging to solve the security risks in the process of designing and manufacturing of food packaging and to cope with the potential threat to human health and damage to ecological system.
Analysis and Structural Topology Optimization for Cross Section of Beam
Authors: Cong Ming , Zhao Qiang , Han Tao , Liu Dong
Published: May 2011

A new type of high speed vertical machining centre which adopt gantry type structure is introduced. Both static and dynamic analysis is carried out before optimization. The optimization of Beam includes 2D and 3D topology optimization. Based on the result of topology optimization a new structure of Beam is developed. It is proved that the static and dynamic performances are both improved.
Technical Research on Quality Control of Fly Ash Concrete
Authors: Niu Hui
Published: May 2011

Based on comprehensive quality management theory, we have studied quality factors of fly ash high-performance concrete in construction, put forward the method of beforehand control, course control and afterwards control. From the project construction of the actual conditions, the raw material selection, mixture design and try gradation and concrete performance of fly ash concrete, has been comprehensively studied and analysised. The optimal dosage of fly ash has been determined with good workability of different fly ash concrete strength grade and mechanical properties meeting the design requirements and good durability, which demonstrates the good effect of the high-performance concrete implementation of total quality control management through the engineering practice.
Study on Effect of Rolling Crashworthiness of the Main SUV Vehicle Components
Authors: Zhao Guang Yao , Fu Peng , Tang Chuan Yin , Zhang Di
Published: May 2011

Aimed at the body of SUV vehicle , according to the criteria of FMVSS216 vehicle safety regulations , in LS-DYNA software environment , the simulation analysis of effects of the design parameters of main components of the body on roll crashworthiness in the process of vehicle crashing and rolling is presented in the paper , based on finite element analysis method, with the test methods of applying pendulum collision. The characteristics of the crashworthiness and energy absorption of the pillar pendulum which have different design parameters, such as shapes and thickness, et. al., are emphasized particularly in the paper. A simple finite element model of SUV is established, the effect of different design parameters of stiffness of body cover to the whole distribution of energy absorption and the reasonable transfer of total energy is discussed. The noticeable issue and advice on body design of SUV is proposed.
Discussion on the Application of Emotional Interaction to Furniture Design
Authors: Li Jin , Sha Qiang , Liu Li , Zhuang Qing Fang
Published: May 2011

Emotional interaction is a key aspect of furniture design. It focuses on changing the way of interaction between human and furniture, from one-way information transmission to two-way information transmission. So users can get more fun and pleasure in home life. The concept of emotional interaction is analyzed, and then its application to furniture design and the development trends are explained.
Analysis on Velocity Vibration Characteristics of Stator of Radial Piston Pump
Authors: Zhou Tian Yue
Published: May 2011

The working mode of constant-pressure radial piston pump includes the mode of constant flow and constant pressure. The dynamic model of stator vibration was established and the analysis was made on the stator vibrating velocity in frequency domain to the two modes. Measurement mechanism was designed to test the vibration of stator of JB32H-type radial piston pump. It is concluded from the analysis and test results that the velocity of stator vibrates periodically on the two modes. Stator velocity vibrates in the range of higher frequency on the mode of constant flow than on the mode of constant pressure. The conclusions are helpful to the noise control of piston pump.
Variation Analysis of Starting Friction Torque of Blade Bearing for Wind Turbine
Authors: Xia Xin Tao , Liu Jing , Chen Long
Published: May 2011

By simulation experiments, the relation between the starting friction torque of a blade bearing and the overturning moment is explored in order to disclose the nonlinear evolution characteristics of the sample mean and variation coefficient of the starting friction torque. Via the variation analysis of the test data, the result indicates that with the rise of the overturning moment, the sample mean is nonlinearly increased and the sample variation coefficient is nonlinearly decreased in view of the overall situation, at which there is a sensitive spot where the sample variation coefficient makes larger abnormally. This is a new discovery. Perhaps it can lay the foundation for analyzing the starting friction torque measurement system and for designing the blade bearing system.
A Camera Calibration Method Based on Plane Grid Points
Authors: Zhang Bao Feng , Tian Xiu Zhen , Zhang Xiao Ling
Published: May 2011

In order to simplify previous camera calibration method, this paper put forward an easy camera calibration method based on plane grid points on the foundation of Heikkila plane model calibration method. Intrinsic and extrinsic parameters of the camera are calibrated with MATLAB, then the rotation matrix and the translation vector are calculated. The experiment results show this method is not only simple in practice, but also can meet the needs of computer vision systems.
Forward Displacement Analysis of the 4SPS-2CCS Generalized Stewart Parallel Robot Mechanism Based on Hyper-Chaotic Damp Least Square Method
Authors: Luo You Xin , Zeng Bin , Che Xiao Yi
Published: May 2011

The forward displacement analysis of parallel mechanism is attributed to find the solution of complex nonlinear equations which is a very difficult process. Taking chaotic sequences as the initial values of the damp least square method, we can find all the solutions of equations quickly. The paper investigated the initial points generated by hyper-chaotic Hénon mapping and provided a new method and calculation step of finding the all real number solutions of nonlinear equations. Using quaternion, the mathematical model of forward displacement for the generalized 4SPS-2CCS Stewart parallel robot mechanism was established and an example was given. Example showed the calculation is brief and general. It can be used in forward displacement of other parallel mechanism. The research builds the theory basis for dimensional design, trajectory planning and controlling of this type of manipulator.
Forward Displacement Analysis of Nine-Link Barranov Truss Based on Anti-Control of Chaos Newton Downhill Method
Authors: Luo You Xin , Yang Ying
Published: May 2011

The anti-control of chaos Newton downhill method finding all real solutions of nonlinear equations was proposed and the forward displacement analysis on the 25th nine-link Barranov truss was completed. Four constrained equations were established by vector method with complex numbers according to four loops of the mechanism and four supplement equations were also established by increasing four variables and the relation of sine and cosine function. The established eight equations are that of forward displacement analysis of the mechanism. Combining Newton downhill method with chaotic sequences, anti-control of chaos Newton downhill method based on utilizing anti-control of chaos in body motion system to obtain locate initial points to find all real solutions of the nonlinear questions was proposed. The numerical example was given.The result shows that all real solutions have been quickly obtained, and it proves the correctness and validity of the proposed method.
Forward Displacement Analysis of a Kind of 2-Coupled–degree Nine-Link Barranov Truss Based on Hyper-Chaotic Least Square Method
Authors: Luo You Xin , Liu Qi Yuan , Che Xiao Yi
Published: May 2011

The hyper-chaotic least square method finding all real solutions of nonlinear equations was proposed and the forward displacement analysis on the 31th 2-coupled–degree nine-link Barranov truss was completed. Four constrained equations were established by vector method with complex numbers according to four loops of the mechanism and four supplement equations were also established by increasing four variables and the relation of sine and cosine function. The established eight equations are that of forward displacement analysis of the mechanism. Combining least square method with hyper-chaotic sequences, hyper-chaotic least square method based on utilizing parameter coupling hyper-chaotic discrete system to obtain locate initial points to find all real solutions of the nonlinear questions was proposed. The numerical example was given. Comparison was also done with other finding solution method. The result shows that all real solutions have been quickly obtained, and it proves the correctness and validity of the proposed method.
A New Scheme for Refuse Incineration End Point Detection Based on Computer Vision
Authors: Cui Feng Ying
Published: May 2011

The paper introduces computer vision into the detection of end points of flame burning during the process of refuse incineration and proposes a method to detect the end points of flame by image processing. Firstly, filter image and enhance the special quality of shade by total variation de-noising. Secondly, extract the main edge of the flame image by method based on binary morphology algorithm. Thirdly, detect and output the end points of flame by median method which has removed the spike of the image. The results show that the presented method is efficient and the system can meet the requirement of both detection accuracy and processing speed. Also it increases the safety of incineration equipment and saves plenty of labor force.
Influence of Cr2O3 Addition on the Properties of TiAl Composites
Authors: Zhu Jian Feng , Yang Wen Wen , Du Fang Ni
Published: May 2011

Using Ti, Al and Cr2O3 as starting materials, Al2O3 particulate reinforced TiAl composites have been fabricated by in-situ reaction synthesis method. Effects of the Cr2O3 addition on the microstructures and mechanical properties of the TiAl/Al2O3 composites were investigated in detail. The results show that the composites have a matrix of TiAl, Ti3Al, and minor Cr containing phases, and a second reinforcement Al2O3. The addition of Cr2O3 effectively refined the structure of the matrix, and as a result, the mechanical properties of TiAl composites are improved. At Cr2O3 7.36 wt%, the flexural strength and fracture toughness reach the maximum values of 634.62 MPa and 9.79 MPa·m1/2, which are increased by 80% and 30%, respectively. The strengthening mechanism is also discussed.
DWF Format Pattern Based on Collaborative Design Technology
Authors: Ren Wu Ling , Li Ning
Published: May 2011

In view of the current characteristics of lacy graphic’s format and the demands of collaborative design, take Autodesk Corporation's DWF document as a foundation, has analyzed the characteristics and advantages of DWF file format. After havingAutodesk design review study the format of DWF file, in-depth research the collaborative design technology that use DWF file format to store flower patterns and use Autodesk Design Review to annotate and comment on the DWF file. This article's analysis to further study the flower format’s coordinative design and graph sharing has certain guide sense.
Finite Element Analysis for Rocker Arms of Vertical Roller Mill on the ANSYS Workbench
Authors: Cheng Kun
Published: May 2011

Based on illuminating the structure,working principle and force analysis of vertical roller mill, the finite element analysis of rocker arms is carried out on ANSYS Workbench (AWE) platform. First of all, the structure of rocker arms and grinding roll components are simplified,then the three-dimensional entity model and meshing model of vertical roller mill both are established. Secondly, the material attribute,contact type,loads and constraints of rocker arms and grinding roll components are defined,and the total deformation, equivalent stress and safety factor of rocker arms are gained after numerical calculation.Results show that the up rocker could meet basically application requirements for its uniform stress distribution.But the lower rocker cannot meet the strength requirements for its low safety factor,and it is necessary to optimize the structure for improving the safety coefficient of lower rocker.
Identification of Chemical Components of Waste Leaves from Cinnamomum camphora by Py-GC/MS
Authors: Liu Qi Mei , Zhang Dang Quan , Peng Wan Xi , Peng Kuan
Published: May 2011

In order to better utilize and recover the productive waste leaves from the Cinnamomum camphora, pyrolysis- GC/MS technology was used to analyze the possible top value-added components of benzene/ethanol extractives of Cinnamomum camphora leaves. Relative content of each component was determined by area normalization. 95 compounds from 102 peaks representing 99.216% of the benzene/ethanol extractives of Cinnamomum camphora leaves were identified, and the main constituents were Hexadecanoic acid, 4-nitrophenyl ester (17.336%), Vitamin E (4.804%), Oxirane, hexadecyl- (4.639%), 2,6-Bis(3,4-methylenedioxyphenyl) -3,7-dioxabicyclo(3.3.0)octane (4.333%), 1-Hexacosene (4.148%), Hexadecanoic acid, 2-methoxy-, methyl ester (3.783%), 1,19-Eicosadiene (3.607%), 3-Cyclohexene-1- methanol, .alpha.,.alpha.4-trimethyl- (3.542%), .gamma.-Sitosterol (3.495%), Nonacosane (3.217%), .gamma.-Tocopherol (3.119%), Eucalyptol (2.23%), vanillin (2.742%), Heptacosane (2.182%), Pentatriacontane (2.039%), 1-Nonadecene (2.011%), etc. The results of function analyses showed that the 350 °C pyrolyzate from benzene/ethanol extractives of waste leaves of Cinnamomum camphora are abundant in materials of noble natural medicines and cosmetic.
Deep Determination of Top Value-Added Constituents of Phoenix Tree Leaves by GC/MS
Authors: Liu Qi Mei , Zhang Dang Quan , Peng Wan Xi
Published: May 2011

In order to separate top value-added bioactive components from waste leaves of Phoenix tree and hence decrease its pollution to water environment, we attempted to analyze the chemical components of benzene/ethanol extractive of Phoenix leaves by means of GC/MS. Relative content of each component was determined by area normalization, and 10 compounds representing 94.37 % of the extractives were identified. The most abundant constituents were as: Ethanol, 2-butoxy- (47.49% from two peaks), exanoic acid, ethyl ester (22.89%), 1-Butyne, 3-chloro- (17.04%), Bicyclo[3.1.1]heptane, 2,6,6-trimethyl- (3.17%), cis-2,3,5-Trimethoxy-.beta.-methyl- (2.91%), Cyclohexanone, 3-hydroxy- (2.20%), 2,5-Cyclohexadien-1-one, 2,5-dimethyl- (1.35% from two peaks), cis-11-Hexadecen-1-yl acetate (1.04%), Octadecane (1.00%), etc. As the first report here, our result by GC/MS showed that the benzene-methanol extractive of freeze-dried Phoenix leaves can be developed into top value-added materials of medicines, biofuel and solvents.
Adsorption of Hg (II) in Biological and Environmental Samples onto Dithizone-Anchored Organobentonite
Authors: Zhang Dong , Zhang Yan Li
Published: May 2011

A new method for the determination of traces of mercury in environmental and biological samples is described. The present methodology combines determined using a hydride generation-atomic absorption spectrometry (HG-AAS) with pre-concentration/separation of the analyte on dithizone-anchored organobentonite (D-O-bentonite). Optimal experimental conditions for the adsorption of the Hg, including pH, contact time, eluent concentration and volume and co-existing ions have been studied. The result showed that the mercury could be adsorbed on the D-O-bentonite. The adsorbed quantitively was affected by the pH value of medium and contact time. In the medium of pH 5.0, the adsorption time was 15 min, and capacity of adsorption was 23.2 mg·g-1. The mercury adsorbed on the sorbent could be completely eluated by using 3 mol·L-1 HCl. The adsorption agent has been applied to the pre-concentration/separation of mercury in surface water and human hair samples with satisfied results.
Measurement Method of Yarn Tension Based on CCD Technology
Authors: Xu Qiao , Mei Shun Qi , Zhang Zhi Ming
Published: May 2011

As to the disadvantages of traditional contact measurement methods, a non-contact measurement system of yarn tension based on CCD technology is developed, which includes the system working principal and the structure ,the design of area matrix CCD driving circuit, the binary process of video signal boundary features by comparison method. Experimental data from contact measurement and non-contact measurement is contrasted, and the measurement error is analyzed. Experimental results show it is achieved with high accuracy and reliability.
Solid-Phase Extraction Method for Preconcentration/Separation of Zinc Ion in Tap Water and Human Urine Using Organo-Bentonite Modified by Dithizone
Authors: Zhang Dong , Zhang Yan Li
Published: May 2011

A new method was proposed for the preconcentration/separation of zinc at trace levels using a modified organo-bentonite with dithizone (D-O-bentonite) and determined by flame atomic absorption spectrometry (FAAS). The influences of some experimental parameters including pH of the sample solution, contact time, and volume of eluent have been investigated. The influences of some matrix elements were also examined. The results show that the zinc ion could be adsorbed on the D-O-bentonite. The adsorbed quantitively was affected by the pH value of medium and contact time. In the medium of pH 4-5, the contact time was 20 min, and capacity of adsorption was 32.0 mg·g-1. The zinc adsorbed on the sorbent could be completely eluated by using 0.5 mol·L-1 HNO3. The method has a good tolerance to matrix interference. The detection limit of the method for zinc ion was 0.013 µg·L-1. The method was successfully applied to the pre-concentration/separation of zinc ion in the tap water and human urine with satisfactory results.
Research on Methods of Tire Sensory Measurement Based on Image Processing
Authors: Chen Rong Bao , Tao Jing , Fan Wu Ting , Zhang Jun Jie
Published: May 2011

This paper proposes and analyzes sensory measurement of tire based on image processing, which uses tangent value method, proportion method and Euclidean distance method to detect tire pressure and overload and uses Tamura texture features to describe tire abrasion level. The research presents a contactless way to detect tire pressure, overload and abrasion level and has certain advantages and innovations in function and implementation compared with existing TPMS which can’t detect the tire abrasion level. This research is an application of image processing-based computer vision in tire sensory measurement; it makes the measurement of tire automatically and intelligently and can be used to prevent traffic accidents caused by tires effectively. There are practical values.
Modeling and Optimization of Inserting Order Schedule of Agile Supply Chain
Authors: Huang Xian Feng , Wu Bo , Wang Jian Hua
Published: May 2011

In order to solve the inserting order scheduling problem of agile supply chains which already have fixed production plans, a two stage supply chain which consists of one factory and many suppliers is studied. Take minimizing the total supply chain cost as the objective, an Integer Planning (IP) model is designed to describe the scheduling problem based on the time slot representation of corps’s available schedule periods, and a Neighbor Value Partial Interchange Simulated Annealing algorithm(NVPI-SA) is proposed to optimize the IP model. Finally, the practicality and effectiveness of the model and algorithm is verified by scheduling experiments.
A Matching Algorithm and Error Analysis on the Basis of Triangle Mesh
Authors: Zhu Li Min , Liu Chun Guo , Wang Shao Hui , Li Ming Zhe
Published: May 2011

In reverse engineering, in order to analyze the accuracy of formed work-piece, the shape error between the formed work-piece and its CAD model need to be calculated. In this paper, a matching method on the basis of triangle mesh is proposed. This matching method includes three parts: pre-positioning, rough registration and fine registration. Firstly, the maximum projective plane of cloud data is designed to parallel to the xy plane through translation and rotation, and cloud data is translated by a vector which can be obtained with the point with the maximum z coordinate and the origin of coordinates. Secondly, cloud data is gradually rotated 360 degree around z axis confirm the angle making the error minimum. In this way, an initial value of ICP algorithm can be obtained, which can avoid the local convergence in the algorithm. Finally, ICP algorithm can be applied to calculate the surface error further. After matching, the error between work-piece and the CAD model can be calculated by interpolation based on triangle mesh. The results show that the matching method can obtain the higher matching accuracy.
Study on Physics Properties of ESPCP Stator Rubber with Oil Erosion
Authors: Guo Zhong Feng , Wang Shi Jie , Wang Lei , Zhang Yi , Ren Zhong Wei
Published: May 2011

For studying physical properties of Nitrile Butadiene Rubber(NBR) stator of Electrical Submersible-motor-driven Progressive Cavity Pumping (ESPCP) with oil erosion, two different formulations of NBR soaked in crude oil at 90 °C for 168h. Variation rule with time of rubber quality, hardness, volume, tensile strength and elongation rate are got. The results show that erosion in the same temperature, rubber quality increase rapidly in the first 24h, increase slowly down in 24~168h. Rubber hardness does not change significantly soaked within 168h. Rubber volume change obviously in the first 72h and change slowly in 72~168h. In the first 96h, the rubber's tensile strength and elongation rate change quickly, slowly changes in 96~168h. The study has a certain reference of design of ESPCP stator under certain operating conditions.
Designation and Test of Steel Wire Absorber Vibration Isolation Box on Vehicle
Authors: Wang Guo Jun , Jiang Mei Hua , Li Hui Mei , Chen Xin
Published: May 2011

A simple steel wire absorber vibration isolation box designation method was proposed through the analysis of vehicular vibration environment and shock absorbs requirements. A steel wire absorber vibration isolation box was designed through the method. Test shows that the vibration isolation box was able to absorb the vibration from the vehicle and protects the equipments in the box.
Properties Test and Application on New Synchronous Grouting for the Earth Pressure Balance Shield
Authors: Qiao Guo Gang , Yuan Da Jun
Published: May 2011

The type and performance indicators of the grout contribute great impact on the grouting effect. Uniform test method was adopted on the mix design optimization of the new grout, and the raw material requirements and performance requirements of the new grout were developed. Test results of the new grout, inert grout, and cement grout performances were compared and conclusions were drawn that the overall performances of the new grout were better than the other two type grouts. The modification of injection pump and pipe for the new grout injection were introduced, the preliminary application results of Shanghai and Suzhou metro showed that the new grout played a very good role on the surface subsidence control.
Purification and Characterization of Chitinases from Bacillus licheniformis Using Auricularia auricular Colloidal Substance as a Substrate
Authors: Zhang Yong Jun , Xian Qiao , He Jie Min , Zhao Meng Yao
Published: May 2011

A chitinase was purified from the culture supernatant of Bacillus licheniformis with Auricularia auricular colloidal substance as the sole carbon source. The optimized conditions of this species strain for the production of chitinases were found to be when the culture was shaken at 37°C for 3 days in medium (pH 7) containing 0.05% KH2PO4,0.5%NaNO3, 0.05% MgSO4·7H2O and 1.5% Auricularia auricular colloidal substance powder(w/v). The molecular weights of the chitinases determined by SDS-PAGE were approximately 52kDa. The chitinases was inhibited highly by Mg2+ and PMSF, whereas Co2+ and Mn2+ could increase highly the activity of the chitinase.
Experimental Study on Dynamic Simulation of Circulating Cooling Water Biofouling
Authors: Cao Sheng Xian , Zhang Yan Hui , Liu Yang
Published: May 2011

To study the formation mechanism and the chemical component of biofouling, the biofouling formation was simulated by the dynamic simulation device of circulating cooling water under the constant condition of 30°C and 0.4 m/s. The slime-forming bacteria and Iron Bacteria were selected as the research subject. Adsorption theory of bacteria in the solid/liquid interface was analyzed by colloidal stability theory. The two kinds of bacteria on heat transfer and the relationship between the total number of bacteria and fouling resistance were studied. The main component of biofouling was characterized using XPS. The results show that Iron Bacteria on the negative effects of heat transfer is greater than the slime-forming bacteria. The total number of bacteria is the maximum in the end of the induction period. The main component of biofouling of the slime-forming bacteria of iron bacteria is C, O, N, Fe, Ca, Mg, etc. The major elements of the ratio in different strains exists diversity in the stainless steel heat exchanger, but the most important elements is carbon and oxygen.
Effects of pH and Anion Species on Cr(VI) Removal by Magnetite
Authors: Ren Hai Tao , Jia Shao Yi , Liu Yong , Wu Song Hai , Xing Yong Xu , Zhang Yin Bao
Published: May 2011

Magnetite was prepared to remove poisonous hexavalent chromium [Cr(VI)] from aqueous solution. Batch experiments were conducted to measure the effects on removal of Cr(VI) of different parameters such as ionic strength, pH, and initial concentration. Results demonstrated that the removal of Cr(VI) on magnetite was decreased with the increase of pH in the range of 3.4-5.0, but independent of ionic strength. The removal percentage of Cr(VI) also decreased with the increase of Cr(VI) concentration in the range of 50-200 mg/L. At pH 3.5 and 5.0, the presence of SO42−retarded the removal of Cr(VI) via electrostatic interactions and/or competition for surfaces sites on magnetite. The pH of the medium and presence of anion species were critical factors in the removal of Cr(VI) from aqueous solution.
Effect of Boron or Cuprum on Phase Transition and Mechanical Properties of High-Strength Steels for Oil Tank
Authors: Qi Liang , Zhao Ai Min , Zhao Zheng Zhi
Published: May 2011

Two kinds of oil tank steels were fabricated by added B(B-steel) and Cu(Cu-steel) , and their microstructures, tensile and Charpy impact properties, undercooled austenite transformation were investigated. In this work,0.0016%B can improve hardenability distinctly. The B-steel was mainly composed of bainite at the cooling rate of 3°Cs-1, but the Cu-steel completely consisted of bainite when the cooling rate exceed 20°Cs-1. The steels manufactured by thermo-mechanical controlled process , test results indicated that the B-steel had the higher yield and tensile strength than the Cu-steel ,because their volume fractions and morphologies of bainite. The Cu-steel had the higher impact energy than the B-steel because of their higher effective grain size. Majority of the precipitation particles which were compounded of Nb and Ti existed as（Nbx,Ti(1-x)) (CyN(1-y)).
A Primary Study on Preparation of Mullite with Solid Waste
Authors: Liang Zhi Yu , Yan Gui Yang , Zheng Liu Ping , Zheng Xing Hua , Ruan Yu Zhong
Published: May 2011

A novel technique of Spent FCC equilibrium catalyst utilization is presented and mullite are prepared from it. The chemical composition, structure and thermal stability of the spent FCC equilibrium catalyst from oil refinery are characterized by XRD, FT-IR, DTA-TG, Fully chemical analysis technique, SEM. Mullite specimens are prepared by reaction sintering the spent FCC equilibrium catalyst at different temperatures. The result indicates that at 1300-1350°C, the spent FCC equilibrium catalyst could be used to prepare high purity mullite.
Application Study of AlCl3/Al Catalyst in Fridel-Crafts Acylation Reaction
Authors: Wang Wan Lin , Shi Jian Gong
Published: May 2011

The traditional AlCl3 catalyst was substituted by a new-type solid acidic catalyst AlCl3/Al for the synthetic reaction of Fridel-Craft acylation from benzene and benzoyl chloride to diphenyl ketone. It has been showed that the yield of diphenyl ketone rising from 55% to 66%, hydrogen chloride emissions decreasing by 70.8%, and the new one being an environmental friendly catalyst.
Solvent-Free Liquid Phase Oxidation of Benzyl Alcohol to Benzaldehyde over Superfine MgAl2O4 Supported Co-Based Catalysts：Effects of Support MgAl2O4
Authors: Zhang Xin , Qi Mi , Zhang Gui Quan , Lin Tao , Gong Ting
Published: May 2011

MgAl2O4 was respectively prepared by hydrothermal method (MgAl2O4-HT), co-precipitation method (MgAl2O4-CP) and solid reaction method (MgAl2O4-SR). The as-synthesized MgAl2O4 was used as support to prepare CoOx/MgAl2O4 catalysts for the liquid phase oxidation of benzyl alcohol to benzaldehyde by H2O2. The catalytic performance and properties of these supports and catalysts were comparatively investigated by catalytic test, XRD, XRF, N2 isothermal adsorption-desorption, TEM and H2-TPR technologies. The properties of support MgAl2O4 was strongly depended on the preparation method of the support, which affected the catalytic activity of CoOx/MgAl2O4 catalysts in the reaction. CoOx/MgAl2O4-HT exhibited the higher catalytic reactivity and better reusability than CoOx/MgAl2O4-CP and CoOx/MgAl2O4-SR in the reaction, because MgAl2O4-HT was high-surface-area porous nanometer spinel MgAl2O4.