bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of Mobile Electronic Micro-Payment System
Authors: Huang Ting
Published: February 2014

Mobile electronic micro-payment system uses mobile terminals for electronic payments which can circulate in multiple banks and cannot limit from the bank that issues the e-cash. This paper researches electronic micro-payment on the agreement of opening account, the withdrawal agreement, the pay agreement, the deposit agreement, the update protocol of the e-cash based on elliptic curve cryptography (ECC). The design of this system is more suitable for mobile micro-payment terminals with limit of calculation capacity, storage, network bandwidth and power supply, which satisfies the needs of the day-to-day transactions.
Program Design of Dynamic Arrangement-Based Immediate Generation of Electronic Seals
Authors: Yin Shao Fang
Published: February 2014

Applying electronic seals in banking, we develop a effective way to generate electronic seals dynamically and print them on business vouchers. It involves Java Graphics, image processing and database technology. Compared with static electronic seals and physical seals, it shows a standardized, flexible and quick features and bears certain practical value.
Research on the Realization of LRU Algorithm
Authors: Wang Hong
Published: February 2014

This paper analyzes LRU page-replacement algorithms, and points out that LRU is closest to OPT among all possible page-replacement algorithms. It studies the four possible methods for LRU algorithm: measurement of time, count of number, use of registers, and use of stack. Data structures and implementation methods are proposed; approximation algorithms are discussed. This paper also analyzes the performances and reliability of different LRU page-replacement algorithms, providing some basic information for us to choose them in different systems.
Design of Three-Dimensional Clothing Dressing System
Authors: Xu Yun
Published: February 2014

The application of virtual reality technology is a hyperlink on a web, multi-user interaction, computer platform-independent modeling and rendering three-dimensional graphics technology. Dressing is using three-dimensional virtual reality systems such real-time, via the user with the mouse or keyboard to control the direction of view, the scene model arbitrary move and zoom, real-time rendering every angle view of the effect of wearing apparel. This study mainly done for the creation and analysis of three-dimensional human data fitting system, three-dimensional three-dimensional body.
Finite Element Analysis for Water Turbine of Horizontal Axis Rotor Wave Energy Converter
Authors: Hu Dong Dong , Liu Yan Jun , Hong Li Kang , Guo Xiao Chen
Published: February 2014

Horizontal axis rotor wave energy converter is a new form for utilization of ocean wave energy, and the axis of its water turbine is parallel with the sea level and perpendicular to the direction of wave. This paper employed the linear wave theory and Froude-Krylov presumptive method to calculate the wave force, which was exerted on the wave energy converter in extremely arduous wave conditions. The finite element research on the deformation and the stress response of the water turbine was carried out to assess its security. The results show that the deformation and the stress responses both reach their maximum values at the 3rd mode shape about 90Hz, and the deformation response is 0.4208mm and the stress response is 0.8052MPa at this frequency, which are both within the required security range.
Finite Element Analysis of the Pressing Screw in Screw Press
Authors: Yu Nan Hui , Li Shi Long , Liu De Wen
Published: February 2014

Screw pressing technology provides a pressing process superior to those traditional ones. Screw press has been used in oil extraction with a long history, both for cold and hot pressing of vegetable oil materials. Pressing screw is the core component of screw press, as a very important working part, its strength is a precondition for ensuring normal operation of the whole machine. Considering the complexity and drawbacks of conventional analysis and check methods for pressing screw, a simplified three-dimensional model of which was set up, then finite element analysis was done, thus obtaining its continuous deformation and stress distribution with the results close to those from theoretical calculation. Hence, this method can be applied to rapidly and correctly find those dangerous positions and existing imperfections of its structure, thus providing valuable data to judge its structural rationality before practical manufacture, so as to make further improvements and optimizations for its structural design.
A Design and Realization of Escalator Handrail Speed Tolerance Measurement Based on ARM Cotex-M4
Authors: Tang Yue Lin
Published: February 2014

Speed tolerance between handrail and the steps, pallets or belt of the escalator or moving walk is important to the passengers safety. This thesis proposes a novel design of ARM Cotex-M4 based double-channeled testing instrument for speed tolerance test which adopts two independent optical encoders to acquire the speed of handrail and the steps. The design handles parameter information obtained through two independent optical encoders by ARM Cotex-M4, then calculates and displays the result by LCD. The experiment shows that the measuring error and resolution ratio agree well with the standard. It can quickly detect the speed tolerance between handrail and the steps and the function of intelligent indication is convenient to the inspector. The field test shows that it can meet the requirements of test and the efficiency is also greatly improved.
Tunnel Excavation Cross-Section Optimization by FEM under Feng-Tian Road in Chongqing
Authors: Huang Cai Hua
Published: February 2014

With the development of transportation, subway is more and more important to every city, but the security of underground railway track faces with serious challenges. Tunnel excavation cross-section types have rectangle, roundness, arch, composite one and so on. In the tunnel excavation under Feng-tian Road in Chongqing, we chose three cross-section types for obtaining optimal scheme by finite element method (FEM). The efficiency and reliability of the optimized tunnel excavation cross-section were demonstrated by simulation results by FEM software Abaqus, and the tunnel excavation engineering under Feng-tian Road in Chongqing. Hope that this work can provide a reference to other tunnel excavation engineering.
The Design of Logistics Vehicle Scheduling System Based on Agent
Authors: Feng Jian Yuan
Published: February 2014

We studied the logistics vehicle scheduling.We have used Unified Modeling Language (UML) for modeling and java agent development framework (JADE) to realize the Agent server-side interactive collaboration features and set up multi-Agent scheduling platform,and have also used the hybrid genetic algorithm to optimize the scheduling task. Through testing examples as well as the combination use of MATLAB and Visual C+ +, the vehicle Gantt chart has been generated to inspect the performance of optimization algorithm.
A NMPC Scheme Based on Stirling's Interpolation Formula Approximation Method
Authors: Gai Jun Feng , Zhao Guo Rong , Zhou Da Wang
Published: February 2014

For a kind of nonlinear system whose input-output function is not differentiable, we proposed a model predictive control scheme based on linearization approximation method. We linearized the object nonlinear system using Stirling's interpolation formula method, and reformulated the control performance index to a quadratic optimization problem, and then, we obtained the optimization control sequences by solving the quadratic optimization problem. In order to reduce the complexity of computation, we ignored the high-order terms associated with the linearization. The simulations show that the presented NMPC scheme can achieve a satisfactory control result, also can decrease the dissipation of control energy and control time.
Sampling Strategy for Free-Form Surface Inspection Using Coordinate Measuring Machines
Authors: Wen Xiu Lan , Wang Dong Xia , Fang Li , Zhao Yi Bing
Published: February 2014

Due to the complexity and non-rotational symmetry of free-form surface, it is difficult to achieve accurate and efficient inspection method. In order to solve this problem, three types of sampling sequences are proposed to specify a set of measuring points of free-form surface. For comparing the results of different sampling strategies, the profile errors of free-form surface are calculated based on a quasi particle swarm optimization (QPSO) searching the transformation parameters to implement localization and surface subdivision method finding the closest points on the design model corresponding to measured points. In order to obtain effective sampling strategies, four design models are generated by non-uniform rational basis spline (NURBS) and parts are manufactured on two machining centers to obtain surfaces of different roughness and measured on CMMs by selecting different sampling methods and sample sizes. The profile errors of parts are calculated by the proposed method and CMMs software, respectively. The results show that randomized Hammersley sampling sequence and medium sample size are preferred for the profile error inspection of given parts if accuracy and time are all considered. The research provides a method for free-form surface accurate inspection while minimizing the sampling time and cost.
Diagnosis Rule Discovery Based on Causality in the Context of Fault Diagnosis in Rotating Machinery
Authors: Jin Zhou , Wang Ru Jing , Zhang Jie
Published: February 2014

The rotating machineries in a factory usually have the characteristics of complex structure and highly automated logic, which generated a large amounts of monitoring data. It is an infeasible task for uses to deal with the massive data and locate fault timely. In this paper, we explore the causality between symptom and fault in the context of fault diagnosis in rotating machinery. We introduce data mining into fault diagnosis and provide a formal definition of causal diagnosis rule based on statistic test. A general framework for diagnosis rule discovery based on causality is provided and a simple implementation is explored with the purpose of providing some enlightenment to the application of causality discovery in fault diagnosis of rotating machinery.
Preliminary Study on Piezoelectric Actuation Solution Proportioner
Authors: Zheng Wei , Yao Xue Feng , Dong Jing Shi , Wu Bo Da
Published: February 2014

The conventional solution proportioner, which is costly and bulky with complex mechanical structure, cant meet the current requirements of the apparatus, such as miniaturization, high reliability and accuracy. Based on the piezoelectric actuation technique, this paper proposed and developed a solution proportioning technique of large dilution ratio. And on the basis of this technology we produced a physical prototype, in which piezoelectric vibrators are used as the main power units and control parts because piezoelectric vibrators are featured with low cost, compact volume, simple structure, non-pollution and others. The physical prototype can be used to dilute various sample solutions of various proportions for one or more times.
Study on the Fundamental of Crop Pest Image Recognition
Authors: Zhang Jie , Jiang Feng , Xie Cheng Jun , Li Rui
Published: February 2014

There are few literatures, among existing studies, about the fundamental of crop pest image recognition and these literatures are not systematic. In view of this situation, in this paper, the basic content of the recognition of crop pests image were studied. Firstly, two ways of acquiring the pest images have been discussed and compared; Secondly, preprocesses of these images have been studied and experimented, including image graying as well as image enhancement; Finally, seven principles and steps have been proposed to construct the pest image set.
Research on Soft Demodulation of Anamorphic PCM/FM Signal under the Condition of Low SNR
Authors: Fu Gang , Zhu Dong Xu , Li Ren Long , Wang Li Ping
Published: February 2014

Reentry telemetry channel is a special channel in the process of remote sensing, black barrier and multipath effect will cause the PCM/FM telemetry signal-to-noise ratio and frequency selective fading , even break through the traditional demodulation method of demodulation threshold, led to the bit error rate is greatly increased when aircraft fly through the reentry telemetry channel. Aiming at the problem, a sliding length of 1 more Symbol Detection (Multi - Symbol Detection, MSD) demodulation algorithm is studied: the continuous observations of N element signal and local signal for joint Detection, but each time the MSD sentences a MSD earlier with N - 1 element coincidence. In theory, the algorithm can increase the channel gain about 3 db, the simulation and test results verified the effectiveness of the proposed algorithm.
Design of Automatic Insertion System for a Tendon-Sheath-Driven Searching and Rescuing Robot
Authors: Zhang Guang Xiao , Wang Xing Song
Published: February 2014

In this paper, an automatic insertion system was designed to send the long and slender rescue robot into ruins. To make it more effective, a dual-drive method was designed that a pulling mechanism drag the arm in front and a pushing mechanism send the arm from behind at the same time. Sickle legs in combination with steering head of the arm ware adopted in the pulling mechanism which has great obstacle climbing performance. Also rubber wheels of the pushing mechanism was driven by a stepper motor and provided great friction to push the robot arm. The control circuit board was designed to realize accuracy control of the automatic insertion system. Experiments show that the propulsion system has good performance in experimental environment.
Application of Photovoltaic Radar Target Simulator by Developing RFID Middleware
Authors: Wan Shao Song , Cao Jian , Yan Cong , Yang Yun
Published: February 2014

This paper discusses photovoltaic radar simulator by developing RFID middleware, which provides a virtual simulation test environment for photovoltaic radar. Through the intensity of infrared light supplies controlled by single-chip microcomputer, infrared supplies can simulate complex external environment. Finally, it is proved that the control process of the photovoltaic simulator has superior performance and expected effect.
Research of Double Nozzle Flapper Valve Accelerated Degradation Test
Authors: Wang Xiao Hong , Li Qiu Xi , Feng Ya Li
Published: February 2014

This paper selected the double nozzle flapper type electro-hydraulic servo valve as the research object. Through to analys the wear failure mechanism of electro-hydraulic servo valve to determine the test stress and to select the Pressure gain and leakage as the Degradation performance indicators. So it makes the detail Accelerated degradation test project . and it designs a test system for the pollution wear test. Then, by modeling the degradation process as a drift Brown Motion of which the first passage time follow inverse Gaussian distribution, this paper generated the reliability model of the electro-hydraulic servo valve. Finally, the maximum likelihood combined with least square of accelerated degradation testing data is used to estimate the degradation data of leakage from the test.
The Application of the Amorphous Metal Transformers in Heavy Oil Electric Heating System
Authors: Sun Bao Jiang , Su Lei , Zhang Chao
Published: February 2014

In order to solve the problem that the big loss of no-load and the fast rise of temperature when employ the conventional silicon steel metal transformer (SSMT) in the electric heating system, we choose the amorphous metal transformer (AMMT). In this paper, firstly, we give a brief introduction of the amorphous alloy material properties and compare the no-load characteristic of the AMMT with the SSMT. Secondly, the structure of intermediate frequency heating system working principle and control strategy are introduced. Finally, extensive experiments were conducted to validate the ideas. The experiments show that the AMMT not only improve the efficiency of transformer, solve the heating problem of transformer, but also improve the stability, security and other technical performance of the system, so it is worth recommending and promoting.
Automatic Bone Drilling in Orthopedic Surgery Parameter Tuning of an Active Force Control
Authors: Boiadjiev Tony , Zagurski Kazimir , Boiadjiev George , Delchev Kamen , Kastelov Rumen
Published: February 2014

This paper deals with an active force control for automatic bone drilling. Orthopedic surgery often requires precise bone drilling for screws to be implanted. The hole quality in drilling process strongly depends on the applied thrust force (resistance force). In particular, a relatively large thrust force, applied in hand-drilling process, could cause a bone trauma (thermo necrosis or bone damage). To solve this problem we apply an active force control in order to achieve constant and safety drilling thrust force. Moreover, we propose an algorithm for parameter tuning of the considered control system.
Design of a Tendon-Sheath-Driven Robot with Proportional Control for Medical Surgery
Authors: Yuan Peng , Wang Xing Song
Published: February 2014

To reduce the trauma to human body in traditional medical surgery and improve the precision of surgical operation, a Tendon-Sheath-Driven robot is designed in this paper. With Tendon-Sheath-Driven mechanism, the robot is composed of head actuator and tailing box. The structure of the head actuator is similar to the tailing box, but much smaller than the later. In the operation process, the head actuator will proportionally cope the motions what operator does, moreover, with sensors installed on each joint of the tailing box, through proportion conversion, doctors can get the parameter variables of each joint on the head actuator easily. Therefore, together with endoscopic, the robot can play an important part in modern medical surgery.
Research on Virtual Cellular Manufacturing Scheduling Based on the Scale-Free Random Network Model
Authors: Han Win Min , Huang Yan , Mei Liang
Published: February 2014

This paper studies the resource conflict resolution problem for virtual cellular manufacturing inter-cell scheduling. The existing literatures on resource conflict of inter-cell scheduling don't take account into delay within building a model. They try to resolve conflict according to coordination strategy, but it is always accompanied by delay. In view of this deficiency and new characteristics of virtual cellular inter-cell scheduling problem, we consider the tardiness of all products. A hybrid multi-objective particle swarm optimization algorithm is proposed, and considers task priority of shared resource. A new decoding method which simulates market mechanism solves resource conflict problem. The feasible task scheduling shortens total flow time and tardiness, improves the utilization of shared resource. Finally, an example is used to verify its feasibility and validity.
Development of an Intelligent CAD System for Involute Cylindrical Gear Cutting Tools
Authors: Liao Ying Hua , Liu Gao Jun , Sun Xiang Guo
Published: February 2014

An intelligent CAD system for Involute cylindrical gear cutting tools is developed by VC++ and SQL server, and it includes four modules, such as user interface, instance query, intelligent gear tool design and database. The intelligent gear tool design is the key to the intelligent CAD system, and it is based on the forward reasoning production system, and as the Intelligent reasoning technology is used for gear tool design, a lots of expert knowledge could be made full use of. The design results by the developed intelligent CAD system are more reasonable than those by a traditional CAD system, and the efficiency and quality of the gear tool design also could be improved. The developed intelligent CAD system supports both 2D and 3D models, which can lay foundation for CAD/CAE/CAM integration of gear cutting tools.
Modal Testing and Parameters' Identification of Spray Boom
Authors: He Yao Jie , Qiu Bai Jing , Yang Ya Fei
Published: February 2014

In order to research dynamic characteristics of the spray boom, this paper described a modal testing about a self-designed spray boom, the testing introduced the way that multi points and multi directions exciting, one point and one direction response to obtain the FRFs, after importing the dates to the computer, accorded to the stability diagram which calculated based on STAR7 from the obtained FRFs, four physical poles of the spray boom in the band between 0.25Hz and 30Hz were determined, then, two kinds of curve fitting method (POLYNOMIAL, GLOBAL) were used to identify the modal parameters. The result showed: the modal parameters identified through POLYNOMIAL curve fitting method is more accurate. For the first frequency of spray boom is 8.97Hz, in the band of ground exciting frequency. This may lead to spray booms deformation easily. So, to optimize the spray boom by increase the first frequency is necessary.
Numerical Simulation of the Influence of Curvature Radius on Aerodynamic Characteristics of the Moving Vehicle
Authors: Wang Jing Yu , Gu Qing Tong , Hu Xing Jun , Wang Bao Yu
Published: February 2014

Based on moving grid and dynamic boundary conditions, the transient aerodynamic characteristics of the flow field around vehicle were studied when simplified model was driving in the crooked road. The influence of curvature radius on aerodynamic characteristics was studied through the analysis of the drag coefficient, the side drag coefficient and the changes of the flow field. The conclusions provide theoretical reference for the further study of the transient aerodynamic characteristics of turning vehicle.
Numerical Simulation Study on the Thickness of Cylinder Influencing on Energy-Absorbing Characteristics
Authors: Zheng Wen Hong , Pan Yi Shan , Ma Xiao , Qiu Zhao Yun , Zhu Xiao Jing
Published: February 2014

According to the problem that the thickness change of the square cylinder as energy-absorption component affect energy-absorption characteristics of the square cylinder, this paper researches that the thickness of the square cylinder for energy-absorption component of the square cylinders influence through theoretical analysis and using numerical calculation method. The theoretical part in this paper analyze local deformation of the square cylinder theoretical model as a result of axial compression ,and in the numerical simulation part this paper simulate the dynamic response of the thin wall square cylinder model structure , thereby research the thickness change of the square cylinder influence on energy-absorption characteristics of the square cylinder. At last, the change curve of the force-deformation is drawn with the change curve of force-peak load, and it is obtained law that the thickness of the square cylinder influence on energy-absorption characteristics the square cylinder and optimum thickness.
Study on Tube Formation Mechanism and Lateral Stiffness Testing Method of the Tubular Conveyor Belt
Authors: Zhang Wei Feng , Wang Chuan Sheng , Zhang Fu Xia , Liu Jia Hong
Published: February 2014

The tubular conveyor belt is a main part of the conveyor belt industry. The lateral stiffness value is an important parameter measuring the performance of the tubular conveyor belt. Therefore, the lateral stiffness value is an important factor to test the quality of the tubular conveyor belt. Because of the complexity in measuring the tubular conveyor belt, at present, there is no unified method to measure the lateral stiffness of a tubular belt and no unified national standard for the stiffness value, which is the criterion that domestic enterprises lack to guide their production. The paper conducts the research on testing mechanism and testing methods of stiffness value, further demonstrates them by experiments, and solves the problem of poor reproducibility and large error of the stiffness value.
Tracking Property Analysis of a Dry Gas Seal Operating in Low Pressure Condition
Authors: Xu Chen , Huang Wei Feng , Liu Xiang Feng
Published: February 2014

An analysis is performed on the tracking property of a spiral groove dry gas seal (DGS) operating in low pressure conditions based on a semi-analytical method developed by Miller and Green. The stiffness model of gas film is established by solving compressible Reynolds equation. And the stiffness model is applied to the kinetic model of seal ring to obtain tracking movement of seal ring. The influences of seal ring face geometry parameters, namely the spiral angle, the groove depth, the groove-dam ratio and the groove-land ratio, on tracking property are evaluated by a series of analysis. Recommended values of such parameters are given as a result of parametric design, to improve tracking performance of DGS in low pressure condition, which one can refer to in turbine compressor spiral groove DGS designs.
Research on the Model of Scramjet Fuel Supply System
Authors: Yi Wan Shuang , Jiang Jin , Li Lin Lin , Chen Hong Gui
Published: February 2014

In order to make a research on the Scramjet Fuel Supply System, I use the software named Flowmaster to make a numerical simulation. In the work, I first make some research on the steady-state response of the Scramjet Fuel Supply System, in which it mainly contains the change trend of the outlet flowrate and the temperature of the working fluid with the variation of the valve's opening, the heating transferred to the fluid and the pressure difference between the inlet and the outlet of the cooling channel. After the simulation of the steady-state characteristics, I make some analysis about the reason casing the Scramjet Fuel Supply System response as this. Then I conduct a calculation of transient process cased the sudden close of the control valve. After the calculation, I also analyze the tendency of pressure changes and the bubble volume generated by the abrupt close of the regulating valve. This may provide some useful theoretical basis and references in the study of characteristics of Scramjet Fuel Supply System.
Research on Stress Intensity Factor of Wheels with Cracks
Authors: Zhang Yan , Xie Ji Long
Published: February 2014

Based on the stress intensity factor criterion, it analyzes the crack extension on wheel web hole of 840D freight train. By changing the lengths of the crack to calculate the different stress intensity factors, it gets the change law of the stress intensity factor in crack propagation process, which provides a strong theoretical basis for detecting the cracks and repairing the wheels of 840D freight train.
The Optimization Design of Multistage Hybrid Planetary Transmission Based on Improved Genetic Algorithm
Authors: Tian Ji Ming , Tan Xin
Published: February 2014

According to the characteristics of genetic algorithm, an improved method combined dynamic penalty function with pseudo-parallel genetic algorithm is presented in this paper and it can overcome the disadvantages of genetic algorithm for improving the efficiency of algorithm. The improved genetic algorithm is applied to optimization design of multistage hybrid planetary transmission. It takes the minimum volumes as object functions, and fully considered such constraint condition. It is showed that the ability to search the global optimal solution of improved genetic algorithm and less number of iterations. The global optimal solution is worked out quickly. Therefore, the size parameters are optimized, as much as the driving stability and efficiency. Compared to the original program, the volume of 16.55% is decreased.
Research of Transferring Characteristics of Ink among Rollers
Authors: Chu Hong Yan , Zhang Xiao Lin , Su Lei , Shen Rui Qing , Cai Li Gang
Published: February 2014

In order to improve the printing quality and know the process of ink transferring well, ink flowing among ink rollers is simulated by using CFX. Firstly ink transferring characteristics between two rollers are analyzed. An experiment is carried out to test the accuracy of this simulation analysis. Then ink transferring characteristics among three and five rollers are analyzed respectively. The general characteristics of ink transferring among rollers are got by comparing the velocity of ink flowing, ink pressure and ink transfer ratio from those simulations. What is more, the accuracy of the simulation analysis is verified by experiment. And this research provides a reference to general characteristics of ink transferring in the actual printing process, and its important for the printing color quality control and has a better application prospect.
The Optimization of Suspension's Bushing Mounting Direction
Authors: Wu Li Guang , Jing Li Xin
Published: February 2014

Based on the software of ADAMS and iSIGHT, this paper presents a method and process which can optimize the bushing mounting direction, and also makes the characteristics of suspension compliance meet specific requirements by adjusting the bushing mounting direction. Simultaneously, this paper uses the McPherson suspension of a vehicle as an example to verify the validity of this optimization method by comparing the results before and after optimization.
Design of Thin Wall Telescopic Space Mast Based on Self-Assembly of Steel Band
Authors: Li Bo , Wang Xing Song
Published: February 2014

In the field of space expansion, in order to save the cost of launching, save the launch vehicle payload space, need small size, light weight, high precision, high storage rate of deployable mechanism. Strip self-assemble principle can be an opening mechanism which has the advantages of light weight, high precision, high rate of transmission characteristics. This mechanism takes the form of screw drive, it can transform the flexible steel band to rigid thin wall tube and unfold the rigid thin wall tube into flexible steel band. Realize the function of telescopic by controlling the conversion between flexible steel band and rigid thin wall tube.
The Reliability Analysis of Wheel Groove Milling Machine's Column Based on Probability Finite Element Method
Authors: Luo Fan Jie , Song Dan Lu
Published: February 2014

Taking the column of the wheel groove milling machine as the research object, the randomness of the structure design parameter is simulated with the PDS of the ANSYS procedure, by taking the column height, load and elastic modulus as input random variables. The reliability analysis for the column deformation has been done with the Monte Carlo method. The results showed that the column reliability is 100% under the sample for 1000 times, and the number of simulation meets accuracy requirements. The evaluation of the probabilistic sensitivities showed that: the elastic modulus is the most important factor affecting the column reliability, and the reliability of column can be improved by decreasing the dispersion of the property parameters of the material.
Comprehensive Analysis of C.I. Engine Fueled with Methyl Esters of Karanja Oil
Authors: Sarala R. , Rajendran M. , Sutharson B
Published: February 2014

Recent concerns over the environment, increasing fuel prices and scarcity of its supply have promoted the interest in development of the alternative sources for petroleum fuels. The methyl esters of vegetable oils, known as biodiesel are becoming increasingly popular because of their low environmental impact and potential as a green alternative fuel for diesel engine and they would not require significant modification of existing engine hardware. Methyl ester of Karanja (KME) derived through transesterification process. Experimental investigations have been carried out to examine properties, performance and emissions of different blends ( KB10,KB20, KB30, KB40 and KB50) of KME. However, its diesel blends showed reasonable efficiencies, lower smoke, CO and HC.
Methods of Low Passive Intermodulation Design
Authors: Wang Bin , Chen Li Jia , Li Wei , Zhao Yuan Qing , Qiu Jing Hui
Published: February 2014

With the increasing of the transmitted power and improvement of the receiver sensitivity, passive intermodulation (PIM) problem become more and more harmful in high power wireless communication system. Combined with the existing physical mechanism research, this article summaries and analysises of the common solution of passive intermodulation, which provides a reference for low passive intermodulation design.
Model Predictive Control Dedicated to an Electrified Auxiliary in HEV/PHEV
Authors: Nguyen Khoa Duc , Bideaux Eric , Pham Minh Tu , le Brusq Philippe
Published: February 2014

Auxiliary electrification in Hybrid Electric Vehicle (HEV) and Plug-in Hybrid Electric Vehicle (PHEV) represents a promising solution in energy management of vehicle. The work presented in the following paper focuses on the design of a controller able to reduce the electrical energy consumption of electrified auxiliaries during a driving cycle. A Model Predictive Control (MPC) is proposed and applied to the air supply system of a PHEV. A comparison of energy consumption between this method and two others (Hysteresis Control and Dynamic Programming) is carried out in order to verify the performance of the MPC controller. Numerical simulations show that this technique allows to obtain a significant gain on energy consumption compared to a standard Hysteresis Control. Furthermore, the difference in term of energy consumption between MPC and Dynamic Programming is weak.
Nonlinear Variation Analysis of Compliant Sheet Metal Assemblies Including Effect of Surface Continuity in Components
Authors: Hashemian Seyed Ali , Moetakef Imani Behnam
Published: February 2014

Assembly processes are often complex and highly nonlinear. In sheet metal assemblies, the most important factor that makes the process nonlinear is the contact interaction between mating parts during the assembly process. This paper focuses on developing a methodology for nonlinear variation analysis of compliant sheet metal assemblies which also includes the effect of surface continuity of components. The proposed methodology integrates a nonlinear finite element analysis with an improved sensitivity-free probability analysis in order to predict the final assembly variation. The efficiency of the developed approach is evaluated by an experimental case study as well as Monte Carlo simulation.
Research on Manufacturing Technics of New Low-Carbon Green Packaging Materials
Authors: Shen De Jun
Published: February 2014

By analysis of manufacturing performance of corn stalk, and taking practical processing technics of particle board in consideration, this paper set strawboard density, adhesive consumption, hot-pressing temperature and hot-pressing pressure as variable factors, set prepressing pressure, prepressing time, shaving shape and moisture content of raw material as fixed factors, exploring the optimal combination of process parameters through orthogonal experiments.
Stress Analysis of Isotropic Material Flywheel Battery Rotor
Authors: Tang Shuang Qing , Xia Xing
Published: February 2014

The strength of metal materials is far less than the new composite material, such as carbon fiber. However, the price of the metal material and manufacturing cost are much lower than composite materials, which makes isotropic material much more practical for flywheel rotor. Through the stress analysis of isotropic material rotor, we can optimize the parameters of the rotor, thus for isotropic material provides the basis for the design of the rotor for flywheel battery.
Parameters Optimization for Roundness of Hemispherical Surface Milling
Authors: Ou Jen Bing , Hao Pei Yi , Shu Ming Hung , Hsu Bi Min , Ou Jen Hsin
Published: February 2014

The hemispherical surface has been widely implicated in design of products. Its precise roundness, a key quality characteristic of smaller-the-better, highly depends on the milling quality of the hemispherical mold. In this paper, we study the optimal machining parameters for the roundness of the hemispherical mold processed by the five-axis NC milling machine with a rotatable-tilting table. Four machining parameters, tool’s tilt angle, surface-cutting speed, feeding per tooth, and depth in axial cutting, are considered with their three varied levels selected on the basis of the onsite professional knowledge acquired from weighing the effect of tool interference and the milling capability of machine tools. The material NAK80, one type of plastic mold steels, possessing excellent resistance and dimensional stability is used as experimental test specimens. The experimental results conclude that the optimal measurements of roundness for the concave and the convex hemispherical molds are 0.022 mm and 0.026 mm, respectively.
Preparation and Characterization of Bulk Porous Nickel Fabricated by Novel Scanning Jet Electrodeposition
Authors: Gong Kai , Xu Guo Qing , Tian Zong Jun
Published: February 2014

The bulk porous nickel was fabricated by layer scanning jet electrodeposition, a novel porous metal preparation technique. The dendritic crystalline layer or normal layer of the bulk porous nickel can be obtained by controlling of the growth conditions. The effects of deposition conditions, such as jet velocity, deposition current density, jet scanning mode, scanning rate, electrolyte solution, etc., on the morphology and growth process of the dendritic structures were studied in detail. It is revealed that the deposition rate and the uniformity of the pore distribution for the bulk porous Ni increase with the decrease of jet velocity. The depositing current density has an upper and lower limit. The dendritic structures are sensitive to the scanning rate, scanning mode, electrolyte solution. As a result, the optimized bulk porous nickels with controllable dendritic crystalline layered structure, pore size and porosity were fabricated by accurately controlling the growth conditions above.
Adaptive Robust Control for Servo System with Combustion Gas Flow Disturbance and Load Uncertainties
Authors: Zheng Ying , Ma Da Wei , Yao Jian Yong , Wu Yue Fei
Published: February 2014

An adaptive robust control scheme is presented. The model of servo system with combustion gas flow disturbance is established. The control law is designed to compensate the load disturbances and system uncertainties. System position tracking performances are indicated through simulation with effective improvement by the proposed method.
Design of the Shunt Liner Active Power Filter for the Hybrid-Magnet Superconducting Outsert Power Supply
Authors: Wu Jing Lin , Long Jiao Jiao , Liu Xiao Ning , Chen Si Ming
Published: February 2014

The power supply scheme for the superconducting outsert of Steady High Magnetic Field Facility (SHMFF) in High Magnetic Field Laboratory of Chinese Academy of Sciences is a switching power supply with active DC power filter. In this paper, a novel shunt liner active power filter (SLAPF) is designed to overcome the disadvantages of existing dc active filter schemes. The system structure and working principle are presented at first. Then the design flow is described, which includes the control method of the current compensator, the analysis of topology chosen for auxiliary power supply, At last, the experimental results show that the filtering effect of SLAPF is good enough to make the power supply meet the technical requirements.
The Novel Control Technology of Wind Turbine in VSCF Wind Power Generation System
Authors: Zhang Jun Li , Li Yu Ren , Xie Li Li
Published: February 2014

In order to make wind power generation system connect to the grid normally in the grid voltage transient fault, it is required in grid security standards that wind power generation system has some capability of fault run-through. The nonlinear controller was designed based on feedback linearization technique. The controller's main purpose is to improve the wind power system steady state performance while to gain better dynamic response speed via controlling the motor terminal voltage and rotor rotation angle. Simulation results indicated that the proposed method could improve the dynamic response speed, as well as improve the steady performance of the wind power generation system.
Research on the Key Technology of PDM Applied to Office Chair Manufacturer
Authors: Tang Zhi Hong , Liu Wen Jin , Zhang Guo Qiang
Published: February 2014

To propose technical difficulties of PDM applied in China office chair industry, and puts forward a solution for the coding problem: first presents a PDM-based classification method of office chair products and parts; Constructed the Office Chair Product Information Tree and base on it established Office Chair Enterprise Information Coding System framework; Base on the classification method and reference the relevant standards, introduce the Tabular Layouts of Article Characteristic, the office chair coding scheme is developed. The coding technology has been verified by applying on Kingdee WISE K/3 PLM system. For the problem of office chair non-digital product data digitization, puts forward the Office Chair Template Data Acquisition & Output Technology, to digitalise the non-digital data for facilitating the PDM system to manage, share to CAM equipment. The technology has been successfully applying to Landmega Furniture Co., Ltd.
Low-Carbon Value Chain Construction for Machinery Manufacturing
Authors: Du Li Juan , Zhang Ying Hua , Du Mei Qing
Published: February 2014

With high correlative degree, machinery manufacturing industry contributes a lot to the other industries technology progress and sustainable development, so low carbon value chain construction for machinery manufacturing is of great meanings for the whole society. In this paper, a low-carbon value chain for machinery manufacturing is designed, besides traditional activities, low-carbon management, products usage and its end of life are included in support and primary activities in value chain, the value chain is characterized by seeking new low-carbon competitive advantages and increasing effectiveness for natural resource recycles, and suggestions to build low-carbon value chains for machinery manufacturing are proposed practically.
Embedded PLC Programming Techniques of Forging CNC System
Authors: Wang Qi Fei , Wang Xing Song , Mao Yu Liang
Published: February 2014

This paper implements embedded PLC programming control system for CNC forging equipment. The control system is based on Windows XP platform, using Visual Studio integrated development environment. The PC programming features include function block (FB), ladder diagram (LD) and instruction list (IL) language. And this paper elaborates the data structure of three kinds of programming languages and implements the loading process of program. After experimental verification, the control system realized the programming control system for users, and provided a good foundation for further explanation of the follow-up program.
Adaptive Impedance Control for a Tendon-Sheath-Driven Compliant Gripper
Authors: Wang Kai , Wang Xing Song
Published: February 2014

This paper investigates the feasibility of adaptive impedance control scheme for compliant gripper. A compliant gripper was designed for manipulation tasks requiring precision position and force control. The gripper is actuated by tendon-sheath transmission system and use strain gages to measure both the displacement and gripping force. Position based impedance control is used to control the contact force to made the gripper more compliantly. Due to the nonlinear of the structure; it is difficult to establish the mathematic model and kinematical equations. Therefore, combine model reference adaptive control strategy with impedance control to realize the soft control of the compliant gripper.
Analysis on the Impact of the Backstays Forms on the Performance of Inclined Tower Cable-Stayed Bridge
Authors: Lei Bo , Lv Ying Zhao , Ren Wei
Published: February 2014

In order to study the differences between spaces twisted backstay inclined tower cable-stayed bridge and conventionally cable-arranged cable-stayed bridge in mechanical property, this paper, taking a single-stay inclined tower space twisted backstays cable-stayed bridge as the study project, adopting FEM by changing the form of the backstays, makes a contrastive analysis on the difference between space twisted backstays cable arrangement (TBCA) and fan-shaped backstays cable arrangement (FBCA) in such aspects as static performance, dynamic property and stability. Some conclusions are concluded: the TBCA is easy to cause such problems as uneven distributed cable force, larger girders bending moment and stress; the integral rigidity of TBCA is less than that of FBCA; in stability, these two differ little, etc. As far as the overall comparison is concerned, TBCA is basically rational from the point of stress. However, while obtaining a certain visual effect, its mechanical property decreases somewhat.
Analysis of Gas Turbine Engines Auxiliary Power Units
Authors: Zuo Yu Yu
Published: February 2014

As aircraft became more complex a need was created for a power source to operate the aircraft systems on the ground without the necessity for operating the aircrafts main engines. This became the task of the Auxiliary Power Unit (APU). The use of an APU on an aircraft also meant that the aircraft was not dependant on ground support equipment at an airfield. It can provide the necessary power for operation of the aircrafts Electrical, Hydraulic and Pneumatic systems. It should come as no surprise that the power unit selected to do this task is a Gas Turbine Engine.
Analysis of the Flow Field and Structure Optimization in Gas-Liquid-Solid Three-Phase Hydrocyclone
Authors: Chen De Hai , Jiang Ming Hu , Zhao Li Xin , Zhang Yong
Published: February 2014

The flow field of gas-liquid-solid three-phase hydrocyclone was analyzed by using the software FLUNET. We have researched different structural parameters on the effect of degassing and degritting. The result shows that the change of inverted cone length ratio, inverted cone diameter, the form of liquid outlet hole structure and the angle of vent structure have some influence on degassing and degritting. Simulation results provides a good technical support for the optimization design of three-phase hydrocyclone structure.
Numerical Analysis on the Failure Process of Jointed Rock under the Effect of Seepage
Authors: Wang Xiang Gang , Fu Jin Wei , Zhu Wei Shen , Zhang Bo
Published: February 2014

In this paper, we have developed a seepage-damage coupling analytical procedure based on FLAC-3D, which can simulate and analyze the crack initiation, propagation and coalescence process of jointed rock under coupling effect. It simulates the failure process of inhomogeneous specimen with two existing fractures under pore water pressure and biaxial loading. Meanwhile compare the results with corresponding non-seepage working condition. By showing the dynamic damage state and analyzing the stress-strain relationship, the mass damage and progressive failure process of jointed rock under the influence of seepage were studied.
Comparison of Structural Support Schemes for Forestage Lighting Gallery in Lecture Hall
Authors: He Chuan Kai , Li Hui Yuan , Lv Xi Zhou
Published: February 2014

This study proposes three structural support schemes for a forestage lighting gallery in a steel truss structure transformed into a lecture hall. The advantages and disadvantages of these schemes are analyzed and compared in terms of structural safety, disturbance implications, and professional cooperation on architectural decoration. A separate light steel frame supporting the forestage lighting gallery has more advantages than only the original truss components and is thus more suitable for the project. The three schemes are compared for the reference of designers confronting similar problems.