bluuebunny/crossref_metadata_2025 huggingface dataset:
Vibration Analysis of Transmission Shafts Using Solid Models
Authors: Yao Xue Shi
Published: September 2013

Fatigue fracture of the intermediate shaft in a transmission was analyzed by finite element method.The solid model has advantages of centrifugal force and spin softening effects over beam models.The results show that the fatigue fracture of the shaft is mainly due to the torsional vibration,the stress stiffening and spin softening have strong influence on the bending vibration medes,and torsional vibration modes do not changed at different speeds.There is accounting for the effects by an adjustment of the stiffness matrix.By using of solid models,the vibration modes of the intermediate shaft were researched,then the model was optimized in order to avoid resonance.
Dynamic Analysis of Less-Teeth Gear Transmission System
Authors: Zhang Dong Sheng , Lv Zhang Lai , Zhang Jian Jun
Published: September 2013

According to the less-teeth gear design theory, the FEM model of less-teeth gear system was established, and its dynamic contact characteristic was analyzed, then dynamic contact simulation was realized. Laws of contact area, contact stress and tooth stress change over time were got, which can be used for the gear profile modification and dynamic characteristics optimization design of the less-teeth gear system.
Study on the Global Bifurcation of Quasi-Zero-Stiffness System
Authors: Yang Qing Chao , Yang Li Hua , Chen Yan Ping , Lai Hao Kai
Published: September 2013

According to the characteristics of the quasi zero stiffness (QZS) system, a dynamics approximation model is established. The effect of excitation force amplitude, frequency and stiffness on the dynamic characteristics of the system is studied by continuation algorithm. The global bifurcation diagram with a wide range of parameters is achieved by using Poincaré mapping method. Results show that when the exciting force amplitude increases to a certain extent, the system will come into multi-cycle and chaos motion state. When exciting force frequency is lower, the system dynamic behavior is complicated, which is helpful for the engineering optimization design.
The Optimal Design and Simulation Analysis of High-Speed Switching Valve Based on Magnetorheological Fluid
Authors: Feng Ru Guang , Wu Zhang Yong , Wei Jing Tao , Qin Yan Jin , Jia Tian Chi
Published: September 2013

This article designed a kind of magnetorheological high-speed on-off valves and made optimized design based on the nature of the magnetorheological fluid(MRF). ANSYS software was used to analyze magnetic field of the two different structures and get the magnetic flux lines distribution and flux density map. The simulation analysis results show that: optimized high speed switching valve, can reduce the loss of the coil and the rise of temperature, improves the life of the valve body, it also can shorten the switching response time and improves the reliability of the valve.
Analysis of Propeller Static Thrust Estimation Method
Authors: Yang Chun Lei , Zhou Ling , Zhang Nan , Jia Hong Guang
Published: September 2013

Propeller thrust estimation method is convenient in selection of propellers. In this paper the Abbott formula method, Hamilton method and strip theory are introduced and then compared with the test value of propeller static thrust. The result shows that the three methods are all correct on the tendency of static thrust varies with revolution. Considered on the entire factor the Hamilton method is recommended.
Study of Modeling and Simulation on Driving Force Power Steering for Electric Vehicle with In-Wheel-Motor-Drive
Authors: Song Chuan Xue , Xiao Feng , Jin Li Qiang , Song Shi Xin , Li Jian Hua , Peng Si Lun
Published: September 2013

The most significant feature of EV with In-Wheel-Motor is that, the torque of each wheel can be controlled independently. [. When EVs turn, controlling torque of steering wheel independently can generate torque difference around the kingpin to reduce the driver's steering force and improve the steering Portability [. At first, the theory and structure of Driving Force Power Steering (DFPS) are discussed and a vehicle dynamic model is built with AMESim software. Based on the control strategy and algorithm a control model is built using Matlab/Simulink. At last, a simulation is performed. The results show that the DFPS system can provide steering power and assist steering efficiently.
Finite Element Analysis for the Working Device of Rough Terrain Forklift
Authors: Yan Hong Feng , Wang Wei Ping , Qi Xiang Yang , Zhang Hui Xian , Tian Tian , He Yue
Published: September 2013

The paper is to study the working device of rough terrain forklift, carried out forces analysis on a typical three section telescopic boom, results indicated that the boom working in the lowest position is the most dangerous situation, Adopted the CAD software of SolidWorks to build the three dimensional models of telescopic boom, then used the FEA component of SolidWorks Simulation to carried out finite element analysis(FEA) for the working device, obtained FEA results. By the use of comparing the stress testing results with the finite element analysis results, certificated that the finite element analysis models are reasonable and the finite element method by Simulation is feasible and reliable. All of these works have very important reference value for designing and optimization of the telehandler in the future.
Study on a Green Manufacturing Process Design System
Authors: Zhong Dong Jie
Published: September 2013

Green manufacturing process is a key segment to guarantee green degree of products manufacturing course. In this paper, a kind of design system is presented by analyzing the function demand of the design system for green manufacturing process and then the modules which constituent the design system are analyzed in detail. Moreover, according to the design principle and the estimate indexes of green manufacturing process, the operation flow of the design system is introduced.
Test Comparison of Damping Effect for Engine Damper Based on Rubber and MR Fluid Damper
Authors: Liang Chun Lan , Ma Jian Wei , Zha Fei
Published: September 2013

The damping effect of 485 diesel engine is taken as research object, on the same conditions, bench test is conducted respectively to self-developed MR fluid damper and traditional rubber damper, comparative analysis of domain and spectrum are conducted to collected test data using MATLAB, the results show that damping effect of MR fluid damper to engine is significantly superior to effect of traditional rubber damper.
The Numerical Simulation Research of Three Dimensional Irregular Wave Based on Wave Spectrum
Authors: Zan Ying Fei , Dong Zhi Hui , Song Lei , Sun Wei
Published: September 2013

Starting from observation statistics that oceanography has existed now and based on wave spectrum and the direction spectrum function, the three-dimensional irregular wave mathematical model is built with the method of halving frequency, and according to the wave spectral energy distribution, the number of frequency division and direction segmentation is studied. Last numerical simulation of three dimensional irregular wave is studied by using Matlab, the temporal and spatial wave simulation waveform is obtained. The simulation results show that this method can simulate three dimensional irregular wave accurately and fast.
Empirical Research on the Rapid Growth of China's ODI: Based on Multinational Panel Data
Authors: Gu Xue Song , Han Li Yan
Published: September 2013

This paper focuses on the home-country factors determining the rapid growth of China's ODI and provides empirical evidence based on 66 countries panel data over 1991 to 2010. First, we expand the investment development path (IDP) theory by including financial factors to establish benchmark model. Then, we explore whether China's net ODI flow is excessive or insufficient by adding China dummy. Finally, we examine the special factors driving and hindering China's ODI by introducing interaction terms. The results reveal that China's ODI level is insufficient. The economic development, export and international reserve drive the growth of China's ODI, while crowing-out effect of domestic investment and poor financing condition are obstacles.
A Study about Energy Consumption and Economic Growth in Qinghai Based on the Co-Integration Analysis
Authors: Li Sheng Mei , Shi Pei Ji , Zhou Qiang
Published: September 2013

Qinghai province was an important and special province in the western in china. Although great changes in all aspects in Qinghai Province in recent years, but due to long-term economic growth, the starting point of production and energy consumption was low, also the production efficiency was poor. There still exists the traditional mode in the economic structure with high energy consumption and low output in basic industries. This study analyzed the relationship between GDP increasing and total energy consumption using co-integration method based on 20 sets of annual data during 1992-2011 in Qinghai province. By the study we found energy development and utilization play an important role in it along with the steady and rapid growth of economy. During the past 20 years energy use efficiency has been improved greatly, but there was still a large potential for energy saving. This paper analyzes the relation between economic growth and energy consumption of Qinghai Province from 1992 to 2011 using the methods of co-integration analysis. The empirical results show that fluctuations relationship existing between Qinghai energy consumption and GDP in the short term, but in the long run there was a long-term stab equilibrium relationship between them. So there will be a lot of space of energy savings in the future relying on scientific and technological progress. Energy industry should be developed further synchronously in order to achieve energy-saving and emission reduction and sustainable development.
Researching on the Mode of Selecting Key Village in Administrative Villages
Authors: Hong Guang Rong , Chen Bi Feng
Published: September 2013

The scientific and rational choice of the key village is the “bottleneck” in the planning and construction of new countryside and a key starting point in the urban-rural integration. The existing situation is that its geographical scope is not clear and the method of selecting it is high artificial, lack of quantitative indicators and scientific analyses. In this article, we take them as theoretical bases some basic principles of selecting the key villages site in administrative villages and the spatial interaction gravitational model, and as practical bases selecting the key villages of 98 administrative villages in Xiaogan, China. By the method of a combination of restriction analysis, calculation of attractive force, comparative analysis and public consultation, we put forward the general process and the 3343 mode: three principles, three factors, four types of key villages and three steps.
Optimization Scheme Selection on Bamboo-Wood Pallet Technological Process
Authors: Pang Yan , Zhu Zhao Peng
Published: September 2013

The use of tray is the basis to improve the operation efficiency of the entire logistics systematic and can reduce logistics cost. The total amount of tray is a measure of the modern logistics technology level in a country. Study on pallets with a new type of green materials has a far-reaching impact for the development of modern logistics in China. As a new type of green pallet, bamboo-wood pallet with high research value is used to replace wooden pallet. Its production process is complex, which affects its promotion. Analytic hierarchy process is used to analyze the manufacture of bamboo-wood pallet border. Easier manufacture methods and optimized technological process are achieved.
The New Method Exploration and Research on Product Carbon Footprint Calculation
Authors: Dong Xiao Dong
Published: September 2013

Based on the existed study at home and abroad on product carbon footprint, we change product carbon footprint calculation perspective from Life Cycle Assessment to"Innovation Chain" perspective, trying to build a Reverse-trace product carbon footprint calculation model based on innovation chain, dedicated to breakthrough results achieved by the original calculation method, at the same time, to provide a scientific basis for setting reasonable standard for product carbon, identifying the opportunities accurately for carbon emission and measuring carbon reduction potential potential accurately and implementing the carbon reduction strategies effectively.
A Conceptual Model of Flapping-Wing Mechanism Inspired from the Results of Numerical Study
Authors: Zhang Xing Wei , Wang Chao , Liu Hang
Published: September 2013

This paper investigates the aerodynamic forces of several plunging wing models by means of computational fluid dynamics. A finite volume method was used to solve the two-dimensional unsteady incompressible Navier-Stokes equations. The forces and power efficiency have been calculated and compared between sets of different models. Current work found that the nonsymmetrical moving can enhance the lift and thrust forces. The numerical results also prove that the flexible wing model can be use to improve the efficiency and reduce the input. Additionally, a new conceptual model for flapping wing mechanism with active deformation and adaptive nonsymmetrical driving motion is proposed base on the numerical results.
A Product Concept Method for Industrial Design Based on Basic-Element Model
Authors: Liu Ling Ling , Xue Cheng Qi
Published: September 2013

Taking basic element model as a breakthrough perspective for Conceptual Design, ways to merge Extenics into industrial design are studied. A clear conception method was proposed in terms of divergent thinking-guided methods, constructed by three points, Special features, Special magnitude, and Special rules. The multifunction chairs were used to illustrate the Special rules application. This paper describes a new perspective for the analysis of the creative ideas. Formalized model, different from the past art theory researching, it was verified the effectiveness, practicality and innovativeness. Keywords: Conceptual Design;basic-element model;Special features; Special magnitude;Special rules
A Designing Method of Variable Topology-Transformable Spacecraft
Authors: Ning Xin , Yue Xiao Kui
Published: September 2013

Based on analysis of the designing methodology of traditional spacecraft and research on various reconfigurable structures, the designing methods of variable topology-transformable spacecraft and main parts of the processing of research are put forward. Aiming to extend the mission of space vehicle, a designing method of variable topology-transformable spacecraft are established. The CADs of two designing methods are also worked out in this paper.
Self-Adapting Function Principle and Creative Design of BFT Type
Authors: Luo Huai Lin , Zhang Ling Yu , Yuan Quan
Published: September 2013

The author summed up the total function of the self-adapting system of slow-footed multiple-flexible driving with overloading by making use of the creative design method of function principle, applied the mechanism of self-adapting to creative design this sort equipment of BFT,funded its false, and proposed way of creative design basing on the total functions.This way has super-performance of self-adapting .It has a good foreground
Exploration on the Packaging Designs Idea of Motion in Quiescence
Authors: Yang Yong Gang , Xu Wen Cai
Published: September 2013

It explored how to create visual motion feeling with an aesthetic viewpoint Motion in Quiescence from the basic function and structure of packaging container model. In this paper, it analyze the following as the barycenter and momentum of container model, the dynamic feeling off horizontal and vertical, the dynamic feeling and the change of body structure, the dynamic modeling of ornament shape. And then it also discuss the following as the independence and relevance of local and whole shape of container structure, the coordination of molding form and perception, which present study and design points for Motion in Quiescence of packaging container molding, and also put forward a art form and some state requirements on Motion in Quiescence for shape design.
The Life Cycle Management and Evaluation of Equipment Maintenance Quality
Authors: Zhang Zhen , Chen Jun , Peng Bin , Zuo Yong Gang
Published: September 2013

The maintenance activity of the equipment is the basis and supports that ensure the intact rate of the equipment and adequately giving play to its capability, to insure the high efficiency of maintenance activity, it is imperative that implement the life cycle management and many positions evaluation for maintenance quality. Firstly, to discuss the countermeasure and method of the life cycle management of maintenance quality from design and application and maintenance stages; secondly, to advance the principle of equipment maintenance quality; lastly, to establish the multi-level fuzzy comprehensive evaluation model of equipment maintenance quality.
Analysis of Multi-Directional Squeeze Casting Liquid Forging of Sewing Machine Oil Chassis
Authors: Xu Cai Ling
Published: September 2013

Sewing machine oil chassis is manufactured by adopting the method of multi-directional squeeze casting liquid forging. When multi-directional pressure is applied on the template, forward and radial pressures inside the solidified body are the same at each direction according to calculation and analysis. The internal pressure inside the blanks is the same, and crystal growth rate and plastic deformation are consistent at each direction, therefore solidification tissue conformation of the cast during multi-directional squeeze casting liquid forging eliminates the defects of directional difference, uneven density, even looseness, cavity shrinkage and the like.
An Analysis of Product Design Based on Traditional Chinese Culture
Authors: Liu Li Li , Chang Kai
Published: September 2013

The article, started with the analysis of the development situation of product design based on traditional Chinese culture, has comprehensively described the connotation of culture and design, along with the relationship between culture and design, and has focused on the application of traditional culture in product design, including the relationship between Chinese element symbols and product form, as well as the link between traditional philosophy and product form. Finally, a conclusion is drawn from examples, which shows the inspiration point as well as the creative point in traditional cultural product design.
Study on the Application of the Unisex Design Element in Menswear Design
Authors: Chen Shu Cong , Wu Yong Wei
Published: September 2013

Through an analysis on the background and the reason for the appearance of the unisex clothing design, this paper discusses the styles and the features of the unisex menswear design, and summarizes the multi-angle application of the unisex elements and the regular rules and trends of the development in the unisex menswear design, aiming to provide theoretical basis for the mens clothing design to develop in a wider and deeper direction.
Time-Pressure Switch Control for Fluid Dispensing Process Based on Self-Adaptive Model
Authors: Chen Cong Ping , Zhang Tao , Guo Shi Jie
Published: September 2013

Because of changes of the epoxy amount in syringe and air compressibility, the time-pressure dispensing has proven to be a challenging task in achieving a high degree of consistency in the dispensed liquid dots volume. Taking residual pressure and non-Newtonian fluid into consideration, a self-adaptive model of the dispensed liquid dots volume was developed for the whole dispensing process. Based on the liquid dots volume model, combined with the syringe air chamber volume prediction model, a time-pressure switch control method was put forward following the principle of time preference control. Numerical simulation has been conducted in the MATLAB using the conventional PI algorithm. Results show that the self-adaptive model can be very well response to the influences of air chamber volume changes to the dispensed liquid dots volume and the proposed control method can significantly improve the dots volume consistency.
Study on the Relationships between New Paper Surface Efficiency and Printing Quality Parameters
Authors: Yang Yong Gang , Liu Fu Ping , Gao Qiao Zhuo
Published: September 2013

Paper surface efficiency (PSE), a paper property integrating gloss and absorbency, can be used to evaluate color reproduction after the interaction of paper and ink. But it was shown that the color reproduction was still related to paper whiteness in practice. In this paper, an assumedPSEformula which integrates gloss, whiteness and ink absorbency is firstly presented, and according to experimental data, it can be well forecasted that the change of these principal paper properties would affect color reproduction result via the newPSEformula. The linear relationships between newPSEformula and ink color reproduction based the description of photo-density measurement were studied subsequently. The results showed that newPSEformula can be used to predict effectively ink color effect.
The Reformation Design of the Qidashan Semi-Mobile Crusher Station
Authors: Wang Xin Yu , Yu Xiao Guang
Published: September 2013

The shortages of the original feeding system of Qidashan mine crusher performed in：The cost of the feed units was high, a total of 6.01 million yuan a year; The feed units could not make crusher full feed, caused resources waste; The feeder accounted for a large space; Move and installation were trouble. The Qidashan mine transformed the feeding system. The reformation design key issues were these: The original feed units were removed . The new feeding system took the place of them. The new steel structure beam was designed. The weight of the feeding system was born by the beam. The ore or rock was discharged into the crusher directly. The 3D solid model of the beam was built in pro/e. The 3D solid model was led into ANSYS. The finite element model was built. Conclusions: The design of the steel structure beam is rational. The results are accurate. The algorithmic method of the numerical simulation is feasible.
The Design of Double Rotary Double Beam Self-Defense 20t Longmen Crane
Authors: Wei Yun Ping , Wu Na
Published: September 2013

This paper introduces a kind of double girder 20t Longmen crane. In view of the Longmen crane in span and weight has been established, the design of a double spiral lifting mechanism and a saddle type self-defense structure, thereby reducing the stress of main beam, reducing weight based on security performance.
Motor Shell Temperature Prediction Based on ARIMA
Authors: Huang Meng Tao , Gao Xing Mei
Published: September 2013

Temperature is an important parameter representing the motor operating conditions. Temperature monitoring data are time series data, which have strong correlations in time. From the perspective of mathematical statistics, these correlations of time series were analyzed using EViews6.0 software in this paper. Through the establishment of ARIMA model, the motor shell temperature time series was predicted.The final prediction model is ARIMA(1,1,2). Simulation shows that ARIMA model has high predict precision and can be used to predict the temperature of motor shell, which can help to detect equipment failures, avoiding the losses caused by motor faults.
Center Wavelength Detection Algorithm of FBG Based on Neural Network
Authors: Yin Cheng Qun , Lu Dan , He Yu Jun
Published: September 2013

In order to find a more accurate center wavelength detection fitting algorithm for fiber Bragg grating (FBG) reflection spectrum, Based on the theory of neural network, we designed different neural network to study and fit the spectral data which has been acquired from FBG.In this paper,we have studied BP,RBFand wavelet neural network structure,comparing the network training time and the result of fitting curves ,wavelet neural network is proved to be the best fitting algorithm.
Composite Fuzzy Control Method for Temperature in Intelligent Moisture Analyzer
Authors: Ling Jing , Che Jin , Liu Da Ming
Published: September 2013

Temperature control system of infrared heating oven in moisture analyzer is characteristic of nonlinear, time-varying and time-lag. A composite fuzzy control (CFC) method is proposed, which combines improved Bang-Bang control with two-stage intelligent fuzzy control. The control algorithm is implemented by MSP430F5438. When the temperature error e between the desired temperature and actual temperature in heating oven is larger than threshold value, the improved Bang-Bang controller is employed in rapidly reducing the error; to decrease the system overshoot, the basic fuzzy controller is used; to reduce the steady-state error of basic fuzzy controller, the auxiliary fuzzy controller is applied. The steady-state error of improved fuzzy controller for oven temperature is less than 0.5°C, which is better than the Chinese National Standards for moisture content measurement.
Electrical Performance Test System of Mobile Power Station Based on LabWindows/CVI
Authors: Li Ya Hui , Liu Hong Wen
Published: September 2013

In order to test the electrical performance parameters of military power station accurately, according to the different test requirements of electrical performance, a test system of PC104 embedded industrial computer was designed, which is based on virtual instrument. The software system based on LabWindows/CVI is introduced, which contains achievements of tests’ method, control of signal sampling and load-shifting, management and output of test data. In the part of hardware design, signal sampling circuit and load-shifting circuit is introduced mostly. The actual test shows that the system can well satisfy the test requirement.
Experiment on Water-Gas Two-Phase Flow Measurement by an Electromagnetic Flow Meter
Authors: Zhang Xiao Zhang , Zhao Li Ru , Liu Jia
Published: September 2013

Advantages of an electromagnetic (EM) flow meter includes nondestructive to flow and less sensitive to flow profile. For these reasons, study on applying EM flow meters to multiphase flow measurement has been attracting researchers. A series of experiments were completed. Resistance between electrodes, gas void fraction, liquid phase mean flow speed and EM flow meters out put were measured. Relations between these data were analyzed. The results showed that certain modified factor could be used for the EM flow meter to measure water-gas two-phase flow.
Research on Calculation and Measurement Method of Hydraulic Excavator Load Force-Time Process
Authors: Hu Xiao Li , Xiang Qin , Zhang Hua , Zhao Gang , Guo Li Ming
Published: September 2013

Based on the mechanical analysis of hydraulic excavator working device, the mechanical relationships between the work load (digging resistance) on the bucket teeth and forces on bucket hydraulic cylinder and boom hydraulic cylinder has been established. Utilizing the geometric relationships among each parts of working device, the formulae of the normal component and the tangential component of excavating resistance have been deduced. A hydraulic excavator load force-time process measurement method was provided, which has such advantages as less measuring points, simpler measuring procedure and lower cost. And the load force-time process could make the load force spectrum for structure optimization design and fatigue life evaluation without the limit of cross section shape change.
Designing and Simulating of a Spherical Robot Based on Three-Dimensional Technology
Authors: Sun Zhang Jun , Yan Jing Long , Li Yue Ju , Li Chao Quan , Di Chao
Published: September 2013

The structure designing and working principle simulating of a multi-locomotion mode spherical robot which has two basic movement patterns-globule mode and three-wheel mode is proposed in this paper. When the two hemispherical shells are closed, the robot is in a globule mode, which is easy to carry, throw and achieve all directional movements on the ground. When faced with sand and slope, it can expand to a three-wheel mode, and enhance the ability to adapt to the environment. Three-dimensional technology is used for building a virtual prototype of the spherical robot, as well as the motion simulation of the spherical robot. Compared with the traditional designing and analyzing methods, the way based on three-dimensional technology is more economical, more convenient and faster.
The Design of Moisture Content of Lubricating Oil Detecting System Based on AD5933
Authors: Liao Qiang , Fan Wei Dong , Wu Jiang , Xu Tao
Published: September 2013

In order to detect lubricating oil moisture content quickly, and replace lubricating oil of equipment in time , impedance type moisture content of lubricating oil detecting system based on AD5933 and cylindrical coaxial capacitive sensor are explored. The paper selected the excitation voltage amplitude and frequency reasonably, and studied the relationship between water content of lubricating oil and impedance value. The result suggests that when the excitation voltage amplitude is 2V, the frequency ranges from 4 kHz to 6 kHz, moisture content of lubricating oil is closely related to impedance value and lubricating oil resistance value decreases with the increase of its moisture content. In addition, the mathematical model between moisture content of lubricating oil and the impedance value is established, moisture content of lubricating oil can be calculated according to the impedance value.
The Analysis of Mechanism for Generating and Detecting Torsional Guided Wave
Authors: Hu Jian Hong , Tang Zhi Feng , Lv Fu Zai
Published: September 2013

The T(0,1) mode guided wave is widely used in long term NDT of the pipelines. The magnetostrictive transducer for generating and detecting guided wave is important to long term NDT of the pipelines because the transducer is compact and can be used at high temperature. The paper explains the mechanism of the generation and detection of T(0,1) mode guided wave in magnetostrictive strip based on Wiedemann effect. The experiment with MSGW is done to confirm the mechanism in a aluminum pipe.
A Novel Structured Light Pattern for One-Shot Shape Acquisition
Authors: Chen Jin , Tang Li Xin , Chen Hui Long
Published: September 2013

This paper proposes a new one-shot grayscale structured lighting scheme to obtain depth data fast. Its key idea is to code the pattern using modulated sinusoidal gratings along two axes. The features used for matching are the fringe central lines of the vertical grating. The correlation of the intensity profiles is used to measure the similarity of features. Experimental results using a vision system with two cameras and a projector show that the proposed scheme is effective and efficient.
Dynamic Characteristics of a Rigid Spindle Supported by Water-Lubricated Bearings
Authors: Feng Hui Hui
Published: September 2013

In this paper, a rigid spindle supported by two identical water-lubricated journal bearings is proposed. The dynamic equations of motion are presented to predicate the performance of the spindle. Under the assumption of linearity, the responses of the rotor excited by constant external force and unbalance force are comprehensively discussed by the fourth Runge-Kutta method. To analyze the static and dynamic characteristics of the water-lubricated bearings, the bulk flow turbulent theory is used and numerically solved by finite difference method. Results of this investigation contribute a better understanding of the performance of a water-lubricated bearing-rotor system.
Design of Gun Comprehensive Performance Test System Based on LabWindows/CVI and Dynamic Recoil
Authors: Li Ting , Wang Lu , Zhao Rui
Published: September 2013

Because of the gun comprehensive performance detection means backward, and unable to meet the maintenance and support needs, we analysis on the artillery and comprehensive index. The detection system for the breechblock and anti-recoil mechanism and aimed machine is designed. Using advanced hydraulic control technology, realize the technical indicators detection under recoil process. The performance status before repair and repair quality are completely grasped. Its proved in the application this system runs stably and reliably.
A Rapid Monitoring System for the Determination of COD in Waters Based on Ultrasonic Assisted Digestion and Miniaturized Spectral Analytical System
Authors: Wei Kang Lin , Chen Ming , Wang Fei , Fang Qiong
Published: September 2013

Chemical Oxygen Demand (COD) is an much important key water quality parameter . In view of the technical defects of existing detection methods and monitoring instruments for measuring COD, a new detection method based on ultrasonic assisted sample digestion and spectrum analysis was put forward in this paper, and the automatic monitoring system prototype based on such detection method had been developped. Aiming at environmental water samples, the spot experiment had been carried out to contrast prototype with Chinas national standard analysis method for measuring COD, and the results showed that the automatic monitoring instrument prototype had good repeatability (10%) and high accuracy (±10%), which met the technical qualifications of Chinas envirormental protection industry standards.
A Research on the Relationship of Screw Speed and Extrusion Pressure
Authors: Gao Yuan Lou , Liu Lian Xia , Zheng Jian Li
Published: September 2013

When extrusion molding, the pressure fluctuations within the nose is the largest problem in the extruder production. In the present, we use mainly to change speed to adjust the pressure fluctuations, but knowledge is still relatively scarce on relation between the speed and pressure. By CFX fluid simulation of flow field distribution in extruder based on PVC production, we obtain the law of pressure with the change of speed, which provide guidance for the control of press inside the extruder.
A Review: Color Image Segmentation Based on Color Space
Authors: Li Meng Xin , Hou Ding Ding , Xia Xing Hua , Fan Jing Jing , Xu Wei Jing
Published: September 2013

Abstract: While the methods of gray image segmentation keeping innovation, researches on color image segmentation have a marked development, and the gray image segmentation provides research base for color image segmentation. At present, the problem of color image segmentation has become a fundamental one and had significant impact on both new pattern recognition algorithms and applications. In order to make the research in this field has a more comprehensive understanding, In this paper, several typical approaches are presented and discussed, and expected to seek an algorithm with better real-time and robustness. algorithm combining both SOFM and FCM clustering is selected to be better in robustness, and reduce the hassle of looking for a suitable feature space.
An Adaptive Image Binarization Method for Laser Direct Marking Data Matrix Symbols on Metal Surface
Authors: Li Jin Rui , Wang Ai Qun , Li Jian Mei , Wu Yu Song
Published: September 2013

The image binarization of laser direct marking Data Matrix symbols on metal surface is a key procedure during recognition. Contrast and light uniformity of the symbols is greatly affected by the uneven illumination and reflection of the parts. To avoid the limitation of present binarized methods, an adaptive binarization method composed of Otsu method and Nearest neighbor pixels contributing threshold method is proposed. It takes global and local gray information into consideration, as well as the distribution of gray gradient. Experimental results show that the proposed method has a higher recognition rate and reliability.
Calculation of Optimized Movement Trajectories for the Human Forearm
Authors: Yang Li Li
Published: September 2013

Using the minimum variance model, optimal human forearm trajectories formation was investigated using a discrete time linear quadratic regulator. First, the continuous dynamics of the human forearm were established on the basis of the relation between muscle torque and neural control signal, and then we transferred the continuous system dynamics to discrete time notation. Finally we expressed the objective function of minimum variance model using a discrete time linear quadratic regulator and employed Riccati recursion to obtain the optimal movement trajectories of the human forearm. The results of example simulation show that the optimal movement trajectory of the forearm follows a smooth curve, and the speed curve of the hand is single peaked and bell shaped. These are in good agreement with the inherent kinematic properties of optimal movement, and therefore the method is effective for calculating the optimal movement trajectory of the human forearm.
Magnetic Generator with Automatic Gain Regulation in a Wireless Tracking System for a Capsule Endoscope
Authors: Guo Xu Dong , Ruan Chao , Ge Bin , Yan Rong Guo , Liu Ying
Published: September 2013

To track a capsule endoscope, a novel measuring method based on alternating magnetic field is presented. The signal-to-noise ratio of the magnetic sensor decreases sharply with the increasing tracking distance. Thus, a magnetic generator with automatic gain regulation is designed to improve the localization precision. It is composed of a microcontroller, a DA converter, a timer, a waveform synthesis circuit, a power amplifier, a sequence control circuit and excitation coils. First, the wireless magnetic sensor measures the strength of the magnetic field produced by the magnetic generator. Via radio frequency communication, the measured result is feedback to the comparator of the microcontroller. According to a deviation obtained by comparing the measured results with the reference value, the microcontroller outputs a digital signal to the DA converter to control the magnitude of the exciting current. The prototype of the system was developed and the experiment was performed. The experiment shows that the magnetic field generator can automatically adjust the strength of the exciting signal.
Prediction Research of Highway Traveling Passenger Volume Based on Wavelet Neural Network
Authors: Li Ting Gui , Wang Li
Published: September 2013

Aiming at the problem that it is difficult to predict the highway traveling passenger volume (HTPV), a new prediction model of HTPV based on wavelet neural network (WNN) is proposed. A case study is given to verify the proposed model. The simulation results show that the WNN model has higher convergence speed and prediction precision than the traditional BP neural network model (TBPNNM), and has more practical values.
The Establishment of the Mode for Price Fluctuation of Financial Market and the Prediction of its Tendency
Authors: Gao Yan Ying , Lv Na
Published: September 2013

The financial world is an uncertain universe where events take place every day, every hour, and every second. Information arrives completely randomly and so do the events. The operations in business activities are continually affected by these events beyond the control of the management. One of the most significant examples in financial economics is the most recent economic-financial crisis of 2008-2009 caused by the collapse of Lehman Brothers Holdings Inc.. The aim of this study is to investigate the statistical properties of the empirical data based on time series of the RFTSE100, RS&P500 and forecast one-step-ahead returns for three months. Additionally, we study the behavior of volatility, which is currently determined as a measure for variation of price or return of a financial instrument over time.
Study of Identify Authentication Based on Wavelet Decomposition
Authors: Zhang Xue Min , Xiong Zeng Gang , Mu Zhen Dong
Published: September 2013

the identity authentication is the information society to a commonly used means of information protection, with what kind of identity certification tool is to determine the success or failure of the key authentication, studies show that EEG signal is difficult to counterfeit, therefore the EEG signal is one of the identity certification tool selection. This article uses the wavelet decomposition as data analysis tools, analysis of the EEG signals under normal collected, results show that the acquisition in normal EEG signal, using this method can well identify subjects.
SOM and PSO Based Alerts Clustering in Intrusion Detection System
Authors: Jing Yong Wen , Li Li Fen
Published: September 2013

With the growing deployment of host and network intrusion detection systems (IDSs), thousands of alerts are generally generated from them per day. Managing these alerts becomes critically important. In this paper, a hybrid alert clustering method based on self-Organizing maps (SOM) and particle swarm optimization (PSO) is presented. We firstly select the important features through binary particle swarm optimization (BPSO) and mutual information (MI) and get a dimension reduced dataset. SOM is used to cluster the dataset. PSO is used to evolve the weights for SOM to improve the clustering result. The algorithm is based on a type of unsupervised machine learning algorithm that infers relationships from data without the need to train the algorithm with expertly labelled data. The approach is validated using the 2000 DARPA intrusion detection datasets and comparative results between the canonical SOM and our scheme are presented.
Speaker Identification in Total Variability Space
Authors: Li Qiang , Zhao Ming Bing , Feng Yong
Published: September 2013

Gaussian Mixture Model-Universal Background Model based approaches have been popular used for speaker identification task. But in real complex environment the identification system performs too much worse than in laboratory, and the main reason is the mismatch of the training and testing channel and also the variability of the speaker himself. In this paper we introduce i-vector to the speaker identification system. In i-vector approach, a low dimensional subspace called total variability space is used to estimate both speaker and channel variability. Baum-Welch statistics are first computed over the given UBM to estimate the total variability. From the experiment results, we obtain 2.44% relative accurate identification rate improvement when using total variability space to compensate the mismatch of the variabilities from both the speaker and channel.
Study on the Technology of Extracting Form Structure
Authors: Ding Huang , Zhao Cai , Wang Mei , Zhang Yuan
Published: September 2013

Extraction of form structure is the precondition of the form recognition. The paper presents a simple and fast method for extracting form structure. Through the analysis of form structure characteristics, the method includes extracting form line with mathematical morphology, thinning form line, mending form line, adjusting form line and so on. The method is realized in this paper and the results are given. The result shows that this method is effectively to extract form structure.
Analysis of Vibration Signals of Scroll Compressor Based on Information Entropy
Authors: Wu Zai Xin , Wang Yong Wei , Liu Tao
Published: September 2013

In order to make a quantitative description for the running status of the scroll compressor, a fault diagnosis method of information entropy is proposed on the basis of the theory of entropy. This method is based on singular spectrum entropy in time domain, power spectrum entropy in frequency domain, wavelet power spectrum entropy and wavelet space feature spectrum entropy in time-frequency domain, which is used as the comprehensive appraisal index of quantitative feature for vibration status of scroll compressor. Under condition of invariable speed operation, the identification of natural frequency of is carried out. Meanwhile, the influence of the axial vibration of moving scroll, radial compliance mechanism and slight liquid slugging on the scroll compressor is analyzed quantitatively. Three forms of periodic cataclysm of moving scroll under variable speed operation and the variation of information entropy with rotational speed are disclosed.
Quantitative Analysis of Soft Soil Microstructure in Unloading Levels
Authors: Hu Qi Zhi , Wang Jing Xia , Tao Gao Liang
Published: September 2013

Quantitative analysis of soft soil microstructure in unloading levels are made by using scanning electron microscope (SEM) images, IPP and PS of image technology ,which includes image segmentation, pore size measuring and counting, three dimensional simulation of soft soil microstructure, etc. The results indicate that, with the increase of unloading grade, pore number and area of big aperture are in a sharp increase, the corresponding porosity also in ascension, so the deformation of the soil is mainly due to the change of pore; compared with the apparent 3d images of soil under the transverse profile in unloading levels. The results also indicate that, with the increase of unloading grade, pore area of cross section are in a increase.
Research of Infrared Thermal Imagery Segmentation Technology Based on Visible Light Image
Authors: Ding De Hong , Fang Kui , Yu He Xiang , Qian Ke Jun , Cui Dai Jun
Published: September 2013

To solve the problem of infrared target recognition, byusing the complementarity of visible-light image and infrared-thermal imagery, thisarticle presents a kind of infrared thermal imagery segmentation technology. Segmentingthe target edges of visible-light images, and superimposing the edge on thecorresponding infrared thermal imagery, then segmenting the infrared thermalimagery by the improved weighted regions growing algorithm. After the testabout relevant parameters of the infraredthermal imagery, found that contrast enhancement and entropy increase, witchmaking it easy to split and recognize, and human eye subjective judgment isalso much easier. It put forward a new research method about infrared targetrecognition
Application of Self-Tuning PID Control with Feed-Forward Compensator Based on LS_SVM Inverse Model in Nonlinear System
Authors: Dai Qing Ling
Published: September 2013

Aiming at the difficulty to building inverse model in the inverse model control system, the modeling method of inverse model based on the LS_SVM is proposed. In order to obtain better static and dynamic performance, the feed-forward compensator and self-tuning PID controller are consisted of the compound control system. As can be seen from the simulation results that the compound control system has a good ability to control nonlinear object with high tracking precision, good dynamic performance and better control effect.
Permanent Magnet Synchronous Motor Control Research Based on Improved Sliding Mode Algorithm
Authors: Yi Long Long , Zhang Fu Chun , Hao Yan Zhong , Chen Xin Xin
Published: September 2013

A speed controller with fuzzy sliding mode algorithm was designed by using power function instead of the traditional switch symbol function, and adjusting the approach law parameters combined with fuzzy algorithm in real time, as it was difficult to eliminate the chattering when designing a PMSM speed controller with the traditional sliding mode variable structure. The mathematical model of the PMSM was built in Matlab/Simulink with the vector control strategy. The simulation results showed that the control system of PMSM built by improved sliding mode had quick velocity response with less overshoot and significantly weakened chattering, which verified the efficiency of the improved algorithm in the simulation stage.
Information Delay Protocol Using the Bell State Measurement
Authors: Zhang De Xi , Li Xiao Yu
Published: September 2013

in this paper we present an information delay protocol using quantum the Bell state measurement. By sharing EPR(Einstain-Rosen-Podolsky) pairs and perform Control-NOT operation and the Bell state measurements, one person can give the other person some information which cannot be read until he or she lets the latter do. The unconditional security of the protocol is guaranteed by the laws of quantum physics. When the one decides to let the other get the information, he or she need only to send some dictates through a public classical channel. So the protocol is easier to carry out and more robust in practice.