bluuebunny/crossref_metadata_2025 huggingface dataset:
Intelligent Vision Inspection System for IC Engine Head: An ANN Approach
Authors: Kanna Rajesh , Saravana Manikandan
Published: February 2012

A machine vision system based on Artificial Neural Network (ANN) for inspection of IC Engine block was developed to identify the misalignment and improper diminishing of holes in the IC Engine block. The developed machine vision and ANN module is compared with the commercial MATLAB® software and found results were satisfactory. This work is broadly divided into four stages, namely Intelligent inspection module, Machine Vision module, ANN module and Expert system module. A system with a camera was used to capture the various segments of head of the IC Engine block. The captured bitmap format image of IC Engine block has to be filtered to remove the noises present while capturing and the size is also altered using SPIHT method to an acceptable size and will be given as input to ANN. Generalized ANN with Back-propagation algorithm was used to inspect the IC Engine block. ANN has to be trained to provide the inspected report.
Waste Money Drilling Environment Control Device Design
Authors: Cheng Xian Chun , Du Qiu Lei , Cheng Zi Xuan
Published: February 2012

This paper expounds the design mechanism and principle of control device work environment for dust pollution control and prevention working condition, in waste money drilling processing. This paper also presents the technological process, the device structure design and work mechanism of the device and lays emphasis on the working principle, the classification and selection of the dust filter; presents the classification comparison and selection, the design and characteristic calculations of gas collecting dome; introduces the design, installing methods, main parameter calculations of the piping system, and the computations and selection of the motor and the fan device as well; presents the classification of bag type filter, the requirement and selection of filter bag, and the calculation of main parameters of dust filter. The design of the device not only increases the waste paper recovery efficiency in the process of disposing waste money and avoids dust pollution, but also contributes to the safety, security and the inspection of disposing procedure.
Modeling Analysis and Optimization of Sand Casting Process
Authors: Chang Qing Ming , Yuan Jing , Yang Yin Kai , Chen Xia
Published: February 2012

In this research paper, the sand casting process of a cover-type part for wind turbine was investigated with ProCAST software . The cover-type casting part is big in two dimensions and it is heavy in some local positions where shrinkage cavity and porosity are very likely to from. A non-uniform mesh is used corresponding to the non-uniform wall thickness. Different casting processes are employed, simulated and optimized to obtain sound castings. Simulation results reveal that with appropriate pouring temperature, correct number, size and location of chills and risers, a smooth mold filling, reduced shrinkage and other defects are available and desired sound castings can be produced
Structure and Electrochemical Performance of Cu and Al Codoped Nanometer α-Nickel Hydroxide
Authors: Bao Jie , Zhu Yan Juan , Xu Qing Sheng , Zhuang Yi Huan , Zhao Ru Dong , Zeng Yan Yi , Zhong Hao Liang
Published: February 2012

Nanometer α-nickel hydroxide codoped with Cu and Al has been synthesized by the ultrasonic-assisted precipitation method. The crystal structure and particle size were analyzed by X-ray diffraction (XRD) and particle size distribution (PSD). The electrochemical performance of the samples was characterized by the charge/discharge test and cyclic voltammetry. The results of electrochemical tests demonstrated that the speciﬁc discharge capacity of Cu/Al codoped α-nickel hydroxide (330 mAh/g) is much higher than that of pure spherical nickel (240 mAh/g), and it exhibits a relatively good electrochemical reaction reversibility and large proton diffusion coefficient.
Formulating an Invariant Manipulability Index of Gough-Stewart Platform
Authors: Liu Guo Jun , Zheng Shu Tao , Liu Xiao Chu , Wang Ying Bo , Han Jun Wei
Published: February 2012

Manipulability indexes have been extensively used as objective functions or constraints in the optimal design of robots, especially for the robots with pure active joints and the end-effectors only involving positioning or orientation. The moving platform of Gough-Stewart platform can involve both positioning and orientation, which leads to the conventional Jacobian matrix with entries bearing disparate physical units, then the established manipulability index based on the conventional Jacobian matrix has no physical meaning and is variable under a change of units. Based on a dimensionless Jacobian matrix, this paper established a new manipulability index, which has physical meaning and is invariant under a change of units. In order to design a good performance motion simulator, the extreme values of the new and old manipulability indexes of 2 commercial flight simulators in their reachable workspaces were found by random search method, respectively. From the results, the extreme values of the new manipulability index are in regularity, and can be used as references in the optimal design of the Gough-Stewart platform as motion simulator.
The Ball Screw Installation Position Parameter Decisions and Simulation
Authors: Kim Ki Jun , Wu Cheng Dong , Wang Fei , Wen Shi Guang
Published: February 2012

The robot joints are usually rotational axis by two link joints, bionic features is not strong. The shortcomings of intelligent MR damper control multi-axis bionic knee can only provide resistance and certain sizes of regain momentum, cannot provide larger power, therefore this paper gives by the multi-axis four-bar structure, ball screw transmission hybrid drive multiaxial bionic active knee institutions. And analysis the human leg institutions and commonly used two-bar structure, solve the ball screw transmission installation location parameters. And established based on hybrid drive of the bionic active the knee's virtual prototype.
Optimization Design and Trafficability Analysis of a Flexible Squirm Pipe Robot
Authors: Zhang Yan Heng , Zhang Ming Wei , Feng Wen Long , Sun Han Xu
Published: February 2012

In order to improve the adaptability and moving stabilization of the flexible squirm robot in pipe, its key structures, including brake wheels, flexible spring axle and guide head, are optimized. For the new designed robot, its moving ability and trafficability in straight pipe and L-shape pipe are analyzed. Proceed with the robot's moving qualification, mechanical model of the robot in pipe is established and its squirming qualifications are proposed. Finally, a flexible squirm robot is developed to verify the validity of the proposed method.
Seriation Design and Research on Cam Shedding Mechanism of Looms
Authors: Zhou Guo Qing , Yuan Ru Wang , Jiang Xiu Ming
Published: February 2012

This paper suggests design method for input interface of cam shedding mechanism under multiple working conditions and multiple types of machine according to the process requirement on loom shedding mechanism for compatibility to multiple working conditions and multiple types of machine as well as motion coordination, and describes the relation between number of heddle frame and tooth number of gear for change, gives the standard center distance for corresponding number of gear teeth, establishes the model of output unit of cam shedding mechanism, and whereby educes the calculating method of shedding cam design parameters and the design idea on seriation of cam shedding mechanism, meanwhile determines adaptive fabric textures of cam shedding mechanism as well as each suitable type and number of cam.
Design of Complex Multi-Axis Control System Based on the Aircraft Flexible Tooling Platform
Authors: Yang Ye Guang , Yang Jian Cheng , Wu Da Wei , Xiao Ju Fei
Published: February 2012

According to the analysis of a flexible tooling platform, this paper realized the overall design of the control system for the flexible tooling platform, introduced the compound of the control system and operation principle in detail, realized the design of PC control software based on Visual C++ and CATIA secondary development technology, completed the design of the servo system and the RS-485 control system network and set up a completed flexible tooling platform control system.
Study on the Thermal Characteristics of a Motorized Spindle Unit
Authors: Wu Teng Qing , Liu Heng , Jing Min Qing , Fan Hong Wei
Published: February 2012

Heat generation and heat transfer of motorized spindle unit are studied in this paper, including heat generation of built-in motor and rolling bearings, heat conduction, convection and radiation between spindle components. By modeling a FEM model of a high performance motorized grinding spindle, thermal characteristics simulation of the spindle unit is completed. The thermal characteristics under different spindle speeds, different cooling water flow rates and different forced air flow rates are simulated. The numerical results show that spindle speed and cooling water flow rate have significant influences on thermal characteristics of motorized spindle unit. These results are useful to guide the design and verification of motorized spindle unit.
ILP Model Research of Electronic Manufacturing Enterprise Green Supply Chain Inventory & Transportation Decision-Making
Authors: Ji Shou Wen , Wang Wei , Dong Yan Tao
Published: February 2012

Based on the green supply chain containing electronic manufacturing enterprises, retailers and recycling enterprises, an integer programming model is established to maximize the income of electronic manufacturing enterprises via optimizing inventory of each node and transportation volume between each node. And a certain enterprise data are adopted for verification.
A Study on Dynamic Simulation of Litchi Pitting Process Based on ANSYS / LS-DYNA
Authors: Chen Zhen , Li Chang You , Xu Feng Ying
Published: February 2012

To study the dynamic mechanical changes in litchi pitting process and improve the accuracy of litchi pitting, this paper established a 3-D solid assembly model of litchi, fixture and tool and conducted the finite element discrete of the model by using ANSYS / LS-DYNA software. In addition, the deformations and stress states of litchi’s multi-layer structure under the effects of tool and fixture were simulated and calculated by the LS-DYNA971 solver. The results showed that the deformations and stresses of litchi’s multi-layer structure changed with the increase of cutting depth, and appeared the maximum amplitude out of sync. When the litchi was gonna cut through, the stress amplitude of fruit pulp was the maximum among litchi’s multi-layer structure and the stress amplitude of fruit pulp was the minimum. Pulp would reach its maximum stress when cutting through the litchi, and because of its low strength, the breakage was prone to occur. The stress of fruit stone was large in the initial stage, and big fruit stone was easily led to the breakage for its overlarge stress. In pitting process, the deformation and slippage of litchi would take place with fixture clamping and tool pitting, so this is a complex dynamic deformation process. This study is urgent to make more comprehensive and systematic researches.
Virtual Surface Measurement of Large Deployable Space Antenna Structure
Authors: Chen Mei , Zheng Fei , Zhang Yuan Yuan
Published: February 2012

Virtual surface measurement is necessary to assist the actual measurement of large deployable space antenna structure. To realize a virtual surface measurement on this kind of structures, we take several steps to get the virtual measurement images. A virtual 3D model of the antenna structure and virtual hung system are constructed; virtual measure rules, coded marks and uncoded marks are also built up. The pinhole camera model is used to simulate the actual photogrammetric measurement tools. Through examples with OpenCV tools, the virtual measurement method is verified to be reasonable. Then different resolution images of perspective projections of the virtual measurement in virtual camera positions and orientations are obtained. Proper selections of the camera resolution and proper positions and orientations of the camera are found through virtual measurement experiments. Such results can be used in an actual photogrammetric measurement. The virtual measurement method can be used to reduce the attempt times and to assist the actual measurement with available photogrammetric measurement tools.
Design and Application of KPI Query and Analysis System Based on Warehouse
Authors: Wen Xue , Li Meng Jia , Luo Rong
Published: February 2012

This paper study the current information construction in domestic enterprises, for the lack of timeliness and effectiveness of existing systems in terms of decision making, this paper proposes a program of query analysis system with KPI as a core. Taking the data in business warehouse of ERP system as a data source, this program designs the logic architecture of the system, gives the model of KPI indicators, extracts the relevant KPI, and finally, realizes the program concretely. This system adapts the actual needs of enterprises, and can help them improve the ability of obtaining valuable information, thereby improving the quality and speed of management and decision-making and enhancing the competitiveness of enterprises.
Influence of Different Type Winding Clamps on a Transformer Losses
Authors: Wang Yi Fang , Chi Ji Hong , Song Zhan Hai
Published: February 2012

A 3D model is given for a three phase three limbs transformer, based on finite element method, the magnetic fields distribution are simulated, losses in metallic structure such as clamps, flitch plates and oil tank are analysed, the influence of winding clamp’s shapes on these losses are studied.
Altering Spectrum Method in Temperature Measurement Using Infrared Imager in Complex Background Environment
Authors: Yang Zhen , Zhang Shi Cheng , Yang Li
Published: February 2012

To improve the accuracy of temperature measurement using infrared imager in complex background environment, based on the principles and the formulas of temperature measurement using infrared imager, altering spectrum method in the infrared temperature measurement was derived. For the temperature measurement of gray body in complex background environment, three response bands should be selected in temperature measurement, and then the surface temperature could be obtained by solving responding two iterative equations. This method could be achieved technologically by two means: setting filters in front of infrared imager, or using infrared imagers with different bands. The simulation results show that the temperature of measured object could be obtained with high accuracy through the method, and its error is very small. Through this method, the temperature of measured object could be obtained without knowing its emissivity and background radiation, so the error caused by the measurement of the emissivity of measured object and background radiation could be reduced.
Effect of Cooling Rate and Nb Composition on Non-Isothermal Austenite Grain Growth Kinetics in Nb-HSLA Steel during Hot Rolling
Authors: Ariati Myrna , Manaf Azwar , S. Siradj Eddy
Published: February 2012

Abstract. The strength of a final product of steel is affected by its final austenite grain size.Almost applied models for grain growth based on Beck and Sellars equation , which has the isothermal condition assumption; whilst most of the materials processing take place under non-isothermal condition. The purpose of this research is to find the effect of Nb and cooling rate to the austenite grain growth model of HSLA-Nb steel to predict the Austenite grain size after hot rolling process in non-isothermal condition .The two composition of 0.019 and 0.056% Nb of HSLA-Nb was hot-rolled about 0.3-0.4 deformation at a temperature of 900-11000 C, followed by cooling rate of 7-11 0 C/s, in a time period of 25-40 second, and quenched by using water jetspray. Austenite final grain size was measured . The work shows that the higher Nb content of steel with higher cooling rate will reduce the final austenite grain size . It was also found that the new non-isothermal austenite grain growth after hot-rolled illustrated as a function of cooling rate,which obtained by modifying the previous established model by a cooling rate parameter 1/Crm, and it was more precision compared to previous grain growth equation.
FEM Design and Experiment of a Micro-Gripper Based on Piezoelectric Material
Authors: Long Zhi Li , Zhang Lu Fan , Zhang Jian Guo
Published: February 2012

Micro-gripper is a key module in IC/LED wire bonding. The paper presents a micro-gripper combining with piezoelectric material and flexible structure. The dynamic and static characteristics of the micro-gripper are calculated by finite element method, and the natural frequencies, the vibration modes, as well as the deflection range of the micro-gripper are obtained. In the experiment, the high-speed camera was used to track the vibration of the micro-gripper, and the relationship between deflection range and driven voltage was established. The vibration behavior was measured by a non-contact laser measuring device. These results can help improve the reliability of the micro-gripper used in wire bonding.
Research to the Uniformity of Ni-Co Alloy Electroforming
Authors: Pei He Zhong , Zhang Jun , Zhang Guo Liang , Huang Pan
Published: February 2012

The effects of additive TN1, power waveforms (full wave, half wave, and direct current), current density and pH on the throwing power of Ni-Co alloy electroforming solution had been investigated by orthogonal tests; and the effects of plating parameters on current distribution of cathode by ANSYS numerical simulation were discussed. The results of orthogonal test showed that the additive TN1 had the largest effect on the throwing power; the power waveform was secondary; the current density and pH had minor effect. The biggest throwing power was 78% when the TN1 was 15g/L and waveform was full wave. Numerical simulation showed that the cathode shape and shield had effect on current distribution; reasonable cathode shape and application of shield could improve the current distribution. The thickness uniformity of part could be up to 92% by optimizing of electrolyte, adjusting the electroforming technics and applying second electroplating.
Application Study of Cationic Polymethyl Acrylate Emulsion as Papermaking Sizing Agent
Authors: Ma Yong Sheng , Chen Yun Fa , Sun Xian Hui , Zhao Chuan Jun , Nie Shou Jie
Published: February 2012

The cationic polymethyl acrylate (CPMA) emulsion which was prepared with no soap emulsion polymerization was used with petroleum resin sizing agent in bleached wheat straw pulp and wood pulp as papermaking sizing agent. It was showed that by the experimental results that when the dosage of composite sizing agent composed of CPMA emulsion and anionic petroleum resin sizing agent was 0.2% absolute dry pulp, sizing degree and white degree of handsheet made of bleached wheat straw pulp were improved 33% and 5.2%ISO respectively. It was also showed that when the dosage of composite sizing agent was 0.2% absolute dry pulp, sizing degree and white degree of handsheet made of wood pulp were improved 37% and 4.2%ISO respectively.
Levels and Possible Sources of Formaldehyde in Campus
Authors: Weng Mi Li
Published: February 2012

There are kinds of indoor pollutants in air. Formaldehyde is the most common pollutions in air, especially after a house was decorated. Formaldehyde pollution sources includes adhesives in the man-made board, paint, paint cleaner, pesticides, antiseptic and so on. Campus is the place where population are relatively dense and people stay relatively for a long time. Measuring the pollution levels of formaldehyde in campus can provide basic data to have better understanding of the environmental poblems. In this study, the formaldehyde concentration inside the campus were carefully analyzed and the results showed that the value were all in safe scope, though in the south gate the value was almost near the safety limit at rush our. The formaldehyde in campus mainly came from the manmade woods and car emitting. Well ventilated and green plant were suggested to lower our surroundings of formaldehyde concentration.
The Study on Tourism Development of Intangible Cultural Heritage - Taking Weifang City as Example
Authors: Lu Chun Xiao
Published: February 2012

Differences in cultural norms may mean that tourists from different backgrounds are unaware of accepted standards of behavior. In china, the Handicraft class of intangible cultural heritage in-depth research needs from different perspectives of different disciplines to conduct systematic research. This is still in the initial stage of exploration, arts and crafts class intangible cultural heritage protection theory and practice has yet to be studied in depth.
Thermal Wrinkling Analysis of the Platelet Thermal Management Devices
Authors: Zhang Feng , Xiao Kai , Liu Wei Qiang
Published: February 2012

A simplified rectangular plate model is built up with three simply supported sides and one free side for the thermal wrinkling analysis of the platelet thermal management devices. By using the static method and the Galerkin's method, the thermal wrinkling of the structural plates under the uniform and no-uniform thermal stress is analyzed; meanwhile, numerical method for solving the platelets with three simply supported sides and one free side is also tested. The analysis method presents in the article could not only apply to the platelet thermal management devices, but also to the the wall of a rectangular vessel with an open top, and to the distortion of a welded plate structure.
A Novel VPSA Process for Ventilation Air Methane Enrichment by Active Carbon
Authors: Li Yong Ling , Meng Yu , Liu Ying Shu , Yang Xiong , Zhang Chuan Zhao
Published: February 2012

Enrichment of ventilation air methane(VAM) is crucial to gather acceptable concentration to utilize. In this work, the adsorption characteristics of activated carbon have been tested. A novel three-bed VPSA cycle for recovering methane from methane/nitrogen mixtures using activated carbon have been done experimentally, and the VPSA process studied contains an effluent pressurization step to improve product concentration and recovery. The VPSA process was carried out under adsorption pressure at 155 kPa abs., and desorption pressure at 20 kPa abs., feeding VAM with the methane purity of 0.2%, methane purity of 0.4% with 70% recovery was obtained at ambient temperature while 0.36% purity with 87% recovery. This process has the potential of significantly increasing the product concentration and recovery with respect to the two-bed cycle process by VPSA.
Lane Detection Algorithm Based on Genetic Algorithm and its Parallel Computing Realization
Authors: Zhang Xiao Hui , Qing Liu , Li Mu
Published: February 2012

Based on the target detection of alignment template, the paper designs a lane alignment template by using correlation matching method, and combines with genetic algorithm for template stochastic matching and optimization to realize the lane detection. In order to solve the real-time problem of lane detection algorithm based on genetic algorithm, this paper uses the high performance multi-core DSP chip TMS320C6474 as the core, combines with high-speed data transmission technology of Rapid10, realizes the hardware parallel processing of the lane detection algorithm. By Rapid10 bus, the data transmission speed between the DSP and the DSP can reach 3.125Gbps, it basically realizes transmission without delay, and thereby solves the high speed transmission of the large data quantity between processor. The experimental results show that, no matter the calculated lane line, or the running time is better than the single DSP and PC at the parallel C6474 platform. In addition, the road detection is accurate and reliable, and it has good robustness.
A New Dynamics Model of Structure-Changing Multibody Systems with Flexible Appendages
Authors: Yu Zheng Ning , Li Wen Long , Zhao Yu Shan
Published: February 2012

According to engineering requirements, structure of multibody systems would change and lead to obvious modifications in dynamics model obtained by traditional methods. In this paper, an existing method for rigid body systems with changing structures is extended to systems with flexible appendages, which is more common in engineering. Application of the new generalized approach to a typical 4-body system is actualized. Numerical simulation is carried out and results are the same as theoretical analysis, which indicate the availability and applicability of the new approach.
Efficiency Research of the Equipment of Water Pumping and Gas Production for CBM Well
Authors: Ren Tao , Guo Yi Xiao , Qu Wen Tao , Sun Yan Ping
Published: February 2012

According to the characteristics of the low efficiency of drainage equipment for coal bed methane wells, we analyzed and calculated the coefficient of fullness, plunger stroke loss, leakage and volume factor, which affect pump efficiency. After analyzing the displacement loss caused by various factors, we obtained coefficient of fullness of the most influential factor on the pump efficiency. By analyzing the change relationship among the coefficient of fullness and clearance space, gas fluid ratio, compression ratio and pumping speed, we found shrinking clearance space and reducing gas fluid ratio, compression ratio and pumping speed can increase coefficient of fullness, and we presented several improvement measures to improve pump efficiency. These measures will enable coal bed methane wells production more stable and efficient.
Research on Dynamic Characteristics of Integrated Bit-Rock-Drillstring-Well System
Authors: Fan Rong , Song Chao Sheng , Liu Zhen , Liu Wen Ji
Published: February 2012

With effects of drilling pressure, self-excited force, random impacts and contacts of cone bit and rock, the motion and stress distribution of cone bits -drill string is extraordinary complex during oil drilling. Considering the geometry structure and the comprehensive boundary conditions of the full hole drilling-string system, a coupled nonlinear dynamic model of bit-rock-drill-string-well system is set up using Hamilton approach. Then the dynamic simulation is performed and the dynamic characteristics of drill string system are discussed. Computational results reveal numerous interesting characteristics which can be used to forecast the formation of hole trajectory.
Study on the Effect of Chassis Parameters on Light-Bus Steady State Handling Based on ADAMS
Authors: Guo Rong , Yu Qin Lin , Qiu Shan
Published: February 2012

Aiming at the oversteer trend of a light-bus prototype in the steady state circular test with full load, a virtual prototype of the vehicle was constructed by using MSC.ADAMS/CAR. The modeling methods for the components such as leaf-spring, absorber and rubber sleeve, whose dynamic characteristics appear nonlinear, are discussed. The simulation results show the vehicle exhibits the oversteer behaviour which is consistent with the subjective sensation. To solve the problem, the chassis parameters affecting steady state handling are discussed. A version regulating the roll rate distribution of front and rear suspension was put forward. After some discussion, the sensitivity analysis of the front and rear stabilizer bar stiffness, leaf spring span, front and rear eyehook location of rear suspension are performed to improve steady state handling. Sensitivity analysis results show that decreasing the leaf spring span, increasing the diameter of front stabilizer bar, decreasing the diameter of rear stabilizer bar and moving front and rear eyehook location of rear suspension can solve oversteer problem. It is expected that the above conclusions can provide good technical solutions for engineering improvement.
A Study on the Selection of Logistics Outsourcing Service Provider Based on Analytical Hierarchy Process
Authors: Huang Zhen Yi , Zhao Qi Lan
Published: February 2012

At present, there is much difficulty in choosing appropriate logistic outsourcing service for enterprises, which may even result in logistic failures. One major reason for that is the lack of strong theoretical guidance in logistic outsourcing and in the choosing of a service provider that is adapted to the enterprises development. To solve this problem, this paper constructs the indexes system of service provider choice and evaluation based on the following four aspects: logistic cost, logistic operational efficiency, service provider’s individual quality and capability. The analytic hierarchy process is used in the selection of service provider. And company Z is taken as an example in the calculation. By doing so, this paper constructs a comparatively integrated framework for the selection of logistic outsourcing service provider, perfects the evaluation system of it and provides enterprises with a set of scientific evaluation methods in choosing service provider.
Density Functional Theory Study of Oxygen Carrier Mn3O4(001) Surface Reaction with CO
Authors: Li Wen Yan , Chen Qiu Luan
Published: February 2012

In this paper, density functional theory calculation combined with period slab models were used to investigate the interaction between fuel gas CO and different active site in Mn3O4(001) surface, the formation of bidentate carbonate species, the breakage of old bond along with generation of new bond in CO oxidation process. Different adsorption sites in both Mn terminal and Mn-O terminal was discussed. Results showed that the tetrahedral Mn top site was the favorite adsorption site on the Mn terminal surface with the bonding energy of 1.011eV, while CO bond to the O atom of Mn-O-terminal surface to form a new C-O bond leading to the generation of the bidentate carbonate species. Further, Complete LST/QST method was used to detect the path of generation reaction of CO2 molecular, which predicted activation energy of 0.96eV. The results will promote the fundamental understanding and applications of Mn-based oxygen carrier.
Numerical Analysis of a Slope Stabilized with Anchors
Authors: Sun Shu Wei , Wang Jia Chen , Zhang Zhong Ping
Published: February 2012

The three-dimensional shear strength reduction method is used to evaluate the stability of an idealized slope stabilized with anchors, where the soil-anchor interaction is simulated by zero-thickness three-dimensional interface elements, and the effects of the direction angle, position, spacing on the slope stability are numerical studied. The results show that the reinforcing mechanisms of anchors in slopes are to increase the shearing resistance on the slip surface，and the failure mechanism, predicted by SSR, agrees well with the critical slip circle given by Bishop’s simplified method. The better stabilizing effects can be obtained when the anchors are installed with a small angle between the anchor and the horizontal direction, and slightly closer to the slope toe.
Design for NGW Type Planetary Gear Transmission
Authors: Li Xian Zhi , Yin Bao Lin , Liu Chun Shan , Chen Si Yu
Published: February 2012

This article analyzes the NGW type planetary gear transmission mechanism and structure, establishes boundary constraint conditions and mathematics optimization model in view of the smallest volume's project objective. It can realize the NGW type planetary gear transmission optimization design through compiling corresponding computer program, obtain the optimization design parameters. In optimization design's foundation, it applies the CAD technology to establish drawing program, realizes the parametric drawing.
Study on Influence Factors of Bearing Capacity of Water-Lubricated Thrust Bearing and its Improving Methods
Authors: Zhang Xia , Wang Xin Rong , Li Xiao Hai , Chu Xuhong
Published: February 2012

Water is a kind of low viscosity liquid and the bearing capacity of water lubrication bearings is very low. The influence factors of bearing capacity of water-lubricated thrust bearing and its improving methods are studied. First, bearing capacity characteristic of water-lubricated bearings is expounded. Secondly, the main factors of affecting bearing capacity are analyzed. At last, by combining the master pump motor running condition, the bearing capacity is improved by changing many factors including the material and hardness matching of friction pair, the roughness of grinding area, bearing structure, fan-shaped bushes number, pivot location, confined area of bearing, speed and the medium temperature, etc. The study provides a theory basis for improving bearing capacity of water-lubricated bearings.
Preparation and Characterization of Water-Base Transparent Flame-Retardant Ceramic Coatings for Wood via Sol-Gel Method
Authors: Liu Jia Lin , Wang Chao Sheng , Jiang Zheng Lin , Wang Qiong , Li Li Feng
Published: February 2012

Transparent flame-retardant ceramic coatings were prepared via sol-gel method by siloxane and silica sol as the matrix, organophosphates (M102B) as the fire retardant agent, solvent and other additives. Results showed that such coatings had excellent physical and chemical properties. When the weight ratio of M102B reached 3% in the coatings and the cover weight reached 2g/100cm2 on the wood, the limit time of fire-endurance could get to 64 min. The decompose processes and formation of the flame-retardant coatings were investigated by TGA and FTIR.
Effect of Voids on the Tensile Property of CFRP in Hygrothermal Environment
Authors: Zhang A Ying , Zhang Dong Xing
Published: February 2012

The effects of voids on the longitude tensile strength of T300/914 laminates that exposed to room temperature, hygrothermal and drying environment was discussed in this paper. The experimental results reveal that the saturated moisture content and the rate of water uptake increase with porosity increasing from 0.33% to 1.50%, which proves that voids facilitate moisture absorption. The tensile strength of non-aged specimens decreased 2.36% with the porosity increasing from 0.33% to 1.50%. Compared to non-aged specimens, the tensile strength of aged specimens decreased 5.15%, 5.34% and 7.59% with porosity of 0.33%, 0.71% and 1.50%, respectively. The tensile strength of dried specimens is higher than that of the aged specimens and is lower than that of non-aged specimens in the case of similar porosity.
Synthesis of a Novel Acceptor Unit for D-A Type Polymers: 4,8-Dibromobenzo-[1,2-c;4,5-c′]bis[1,2,5]thiadiazole
Authors: Sun Xiao Xia , Zhuang Xiao Xiao , Ren Ya Li
Published: February 2012

A synthetic approach to synthesize 4,8-Dibromobenzo-[1,2-c;4,5-c’] bis[1,2,5]thiadiazole from a common precursor 2,1,3-Benzothiadiazole is reported. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions.
Effect of Recrystallization on Roll Gap Setting of Medium Plate Rolling
Authors: Tian Ya Qiang , Wu Jian , Wei Ying Li , Song Jin Ying , Chen Lian Sheng
Published: February 2012

In medium plate rolling, the calculation and setting of roll gap value considered not only insufficient austenite recrystallization effect on rolling force, but also coupling of bend elastically and rolling force; and based on combining pre-pressure force and local measurement could get the modal of roll gap value setting and prediction. The result indicated that the prediction of roll gap value is accord with measurement value, it can increase the production quality and hit rate of close-tolerance in medium plate rolling by means of the modal as the method to controlling dimensional accuracy.
Study on the Durability of Fluorinated Water and Oil Repellent Finishing by Contact Angle Method
Authors: Zhang Dian Wei , Cui Yong Zhu , Sui Yan Ling
Published: February 2012

In this paper, fluorinated water and oil repellent finishing agent was mixed with auxiliary agents and the durability of fabrics treated with the finishing agent was investigated. The water and oil repellent property was discussed and evaluated by contact angle method. The results showed that under the same conditions, adding 0.4% cross-linking agent could make the contact angle of the treated fabric higher than untreated, and the durable-washing property of the fabric was excellent and the durability of fluorinated water and oil repellent finishing agent got improved greatly. The optimum process was that the dosage of water and oil repellent finishing agent was 50g/L, the dosage of cross-linking agent was 4g/L, curing temperature was 160 °C and curing time was 90s.
Research on Hydraulic and Control System of Manipulator
Authors: He Ji Li
Published: February 2012

The industrial manipulator has been introduced. The manipulator of cylindrical coordinate type provides with three degrees of freedom including rotation, lifting and expansion, which has corresponding rotation structure, lifting structure, expansion structure. All parts are drove and controlled by using hydraulic cylinder. FluidSIM-H is hydraulic simulation software and tightly integrated the CAD function and simulation function. To simulate and analyze the operation of hydraulic circuit which based on the physical model of hydraulic element and LOGO control. The results showed that the industrial manipulator can work reliably.
An Engineering Method for Asphalt Foaming Modeling Integrating Gas-Liquid Phase Change Process
Authors: Wang An Lin , Ling Fei , Qiu Ruo Fan
Published: February 2012

The asphalt foaming is a nonlinear kinetics process under high temperature and high pressure with multi-phase medium and multi-field condition. It includes stages like transient contact, heat exchange, phase change and bubble generating process. In order to quantitatively describe the relationship between the asphalt foamability and the asphalt foaming equipment physical parameters, the engineering method for asphalt foaming modeling integrating gas-liquid phase change process is created. Meanwhile, the asphalt foaming dynamic model for design parameters and coupled field distribution, which can express multiphase contact, heat exchange and further phase change, is built. Compared to the old non-phase change model, the new model has a stronger correlation to the asphalt foaming experimental results. Therefore, the study is significant for the redesign of the asphalt foaming equipment.
Thermal Conductivity and Thermal Expansion Properties of AlN/EP Composite
Authors: Ma Zhen Hui , Huang Jin Liang , Gu Yong Jun , Jin Biao , Chen Guan Yu
Published: February 2012

AlN/epoxy (AlN/EP) composites were fabricated by casting method. The effects of the AlN content on microstructure, thermal conductivity and thermal expansion properties of composites were investigated. The results indicate that with the AlN content increasing, the thermal conductivity increase, while the coefficient of thermal expansion (CTE) decreases. When the volume fraction of AlN is 25%, the thermal conductivity is 0.507 W/m•K, which is about 2.5 times higher than that of the epoxy matrix, while the coefficient of thermal expansion is 53.7 ppm/°C. The thermal conductivity results obtained were also analyzed using the Maxwell-Eucken model to explain the effect of AlN fillers on the formation of thermal conductive networks.
Study on Ultimate Bearing Capacity of New Steel Composite Tube
Authors: Xing Guo Ran , Dong Li Hua
Published: February 2012

The main purpose of this paper is to research the mechanical properties of polyurethane filled steel tube PFST members with different hoop coefficients and slenderness ratios under axial compression by experimental studies. The influencing laws on stability, ductility and properties of axial compression of the PFST members are got, and the simplified calculating formula for ultimate loading capacity is presented by the regressive analysis.
Research of Dual Cooking Reagents on Bamboo Pulping
Authors: Li Pei Yi , Zhang Mei Yun , Xia Xin Xing , Lin Chun Tao
Published: February 2012

Bamboo, as a kind of non-wood raw material, has a long, thin fiber with wide distribution and rich abundance in China. It was studied that cooking reagents on bamboo pulping. AQ ramification and infiltration reagents were used to improve the cooking schedule. The results showed that AQ ramification could strengthen the cooking, but infiltration reagents couldn’t reach the good expect in cooking. When the AQ ramification and infiltration reagents were used together to cook, it could obviously decrease the Kappa number of the pulps and enhance the yield of pulps. Infiltration reagent Busperse 2806 was the best choice in cooking with AQ ramification. When the dosage of AQ ramification 0.05%, Infiltration reagent 0.03%, the yield of pulps increased 1.31%, kappa number decreased 4.0, and the dosage of AQ ramification 0.05%, Infiltration reagent 0.03%, the kappa number decreased 5.5, the screened yield decreased 1.54%.
Gamma-Ray Radiation-Induced Surface Hydrophobic Effects in Invar Alloy
Authors: Yang Cheng Fu , Wang Wei Wen , Chen Hsin Hwa , Sun Wei Tan , Shiau Chi Lin , Lin Jing Jenn
Published: February 2012

In this paper, we report a new phenomenon observed in the gamma-ray radiation-induced hydrophobic effects on an Invar surface: When the Invar alloy is subjected to different doses of gamma-ray irradiation, the contact angle increases with the radiation dose. Invar samples with exposed to a higher dose appear more hydrophobic, but this tendency disappears following post-irradiation etching. The contact angles of the irradiated and etched Invar samples can be restored back to a stable value with small deviation after 30 min of annealing at 150°C. X-ray diffraction (XRD) analysis found no crystalline structural changes. High resolution field emission scanning microscope (FE-SEM) analyses showed that irradiation might induce crack-like surfaces which could be removed at higher radiation dose in the following acid etchings. It is believed that the chemical bonds of Invar oxide on the surface were broken by the gamma-ray irradiation, thus raising the likelihood of binding with free ions in the air and resulting in the exclusion of the hydrophilic OH bonds, leaving a hydrophobic post-irradiation Invar surface.
Preparation of Urea Slow Release Membrane Environment Friendly
Authors: Wang Shu Jiang , Wang Xing Quan , Chen Ming Hui
Published: February 2012

First, the corn starch was taken as raw material, and then it was broken down by enzymes and fermentation by lactic acid bacteria, and the poly lactic acid was obtained by chemical synthesis. Then the corn starch was taken as raw material again, the dialdehyde starch was obtained by high efficient light-catalytic reactor. Secondly, a certain percentage of dialdehyde starch and urea were mixed together to get urea-formaldehyde resin. Finally, a certain amount of polylactic acid, urea formaldehyde resins and dispersions were put together and mixed in a high-speed stirring to get urea slow release membrane materials. Experimental results showed that it needed 150-300 days degradate completely by 75% poly lactic acid sustained release membrane, while 85% needed 100 -120 days. Single thin membrane absorption test showed that per unit area of the sustained release membrane absorption ability would increase with the poly lactic acid increased, and the absorbent capacity of 85% poly lactic acid of sustained release membrane was 112 times higher than the mass of itself.
Analysis of Sinking Mechanism and Finite Element for Static Pile in Collapsed Loess Region
Authors: Tian Zhi Hui , Wang Yao Jun , Huang Xue Feng
Published: February 2012

The static pile sinking calculation model has been established based on cavity expansion theory and the elastic-plastic analytical solution has been solved. This model can truly reflect the static pile sinking mechanism in collapsed loess region, providing a theoretical basis for the analysis and design of static pile. A finite element model has been set up to simulate the entire pile sinking process. The results show that due to relatively large pile rigidity and strength compared with the soil, under instantaneous load, the surrounding soil will produce a large deformation, which is mainly caused by pile friction diffusion. When the external load increases, the interaction between stress and pile-soil gradually increases; when reaching the proportion of limited load, both of them are close to constant, accordingly, the growth slows down and tend to be stable; when the external load is greater than the proportional limit load, the phenomenon of mutation occurs. Finally, after comparison, the finite element calculation results match well with the test results. Through analysis and engineering practice, static pile is found to have a good prospect in collapsed loess region. Some useful conclusion can be used as references for similar projects in these areas.
Video Steganalysis Exploiting Motion Vector Calibration-Based Features
Authors: Deng Yu , Wu Yun Jie , Zhou Lin Na
Published: February 2012

The motion vector (MV)-based steganography embeds the secret messages by modifying the motion vectors. So the traditional video steganalytic schemes cannot detect the presence of the hidden messages by MV-based steganography. In this paper, a novel calibration-based steganalytic scheme against MV-based steganography is presented. The features are derived from the shift differences between the original and calibrated MVs, and then the feature vector is constructed. Using the extracted feature vectors, the support vector machine (SVM) is trained to detect the presence of stego videos. Compared with other features, the proposed features have better performance even with the low embedding strength.
The Effect of Electromagnetic Stirring on Steel Strand Quality
Authors: Liu Chun , Jin Bai Gang
Published: February 2012

Application experiments have been done to research the strand quality of high carbon steel 65Mn under the condition of electromagnetic stirring. The experimental results show that the effect of electromagnetic stirring with stirring rollers in side-side disposition mode is better than that in face-face disposition mode. The effect of electromagnetic stirring is also increased with the increasing of current intensity, and the continuous stirring is better than alternating stirring. Thus, conclusion could be arrived that the strand inner quality is improved obviously by the adoption of electromagnetic stirring due to 32% increase of equiaxed zone ratio in the strand and the decrease from B0.5 to C1.0 of the center segregation grade.
Leak Detection and Location Using Generalized Correlation Time Delay Estimation Algorithm
Authors: Liu Yang , Tie Yong , Li Dong , Na Shun
Published: February 2012

The generation of leak along the pipeline carrying crude oils and liquid fuels results enormous financial loss to the industry and also effects the environment and public health. Therefore, the leak detection and localization problem has always been a major concern for the corporation. Pipeline detection and location system plays a key role in many industrial processes and activities. In this paper, a leak detection scheme based on generalized correlation time delay estimation algorithm is proposed to solve the problem of leak detection. By estimating the time delay of the two received signals, the system can provide the information of the leak. The experimental results indicate the effectiveness of this approach.
Experimental Study for Equipment Energy Consumption of Bag Filter Causing by the Dust Layer Structure on Filter Bag Surface
Authors: Zhou Rui , Shen Heng Gen
Published: February 2012

The energy consumption of bag house is formed by equipment structure resistance and filter layer resistance, and the filter layer is constituted by smoke dust. In running condition, the structure of filter layer would be changed by sedimentation or backmixing of particles. In order to finding the influence between energy consumption and structure of filter layer, two different structure of filter layer has been studied by experiment. The result show: Layers structure and mixture structure of particles and smoke dust are significant effect on resistance, and it is shown parabola relationship. While the ratio of mass is low, the increase rate of change is low.