bluuebunny/crossref_metadata_2025 huggingface dataset:
LZW Algorithm Research and Amelioration Based on Pointer Trace
Authors: Zhang Feng Yuan , Wen Li Li , Jia Xiao Lu , Li Zhao , Chen Meng Li , Chen Cheng
Published: October 2011

LZW (Lempel Ziv Welch) algorithm is a dictionary compression algorithm with excellent performance. The algorithm, which has important advantages including strong universal ability and a dynamically formed dictionary in coding and decoding, is used extensively in lossless data compression field. This paper implements an LZW algorithm based on a tree-like data structure in C and offers two optimization schemes, including using pointer-trace and Variable-length code. The results show that these schemes extremely improve the compression efficiency with reduced compression time cost and provide an effective guarantee for real time transmission.
Synthesis and Photocatalytic Property of TiO2 Particles Preparated in the Solvothermal Method
Authors: Wang Li Qin , Zhao Xiu Li , Yang Xiang Ni , Han Yang , Zhang Rui Jun , Yang Yu Lin
Published: October 2011

The TiO2 particles were synthesized in the solvothermal method, and they were characterized by the means of scanning electron microscopy (SEM), X-ray powder diffraction (XRD), thermogravimetric analysis and differential thermal analysis (TG-DTA) and the N2 adsorption–desorption measurement. The photocatalytic property of as-prepared TiO2 particles was evaluated by the degradation experiment of methyl orange aqueous solution. Results indicated that TiO2 nanoparticles were the combination of anatase-TiO2 and rutile-TiO2 crystals with integrated crystals form and high crystallinity, which may be helpful for stabilizing the anatase and improving the photocatalytic activity. The adsorption-desorption isotherms was the typical type IV isotherm with a clear H2-type hysteresis loops in the desorption branch. The results showed mesoporous TiO2 particles had the average pore diameter of 3.587 nm, the average specific surface areas of 270.342 m2/g, and the average pore volume of 0.259 cm3/g. Meantime, the as-prepared TiO2 particles had good thermal stability and high photocatalytic activity, when being irradiated for 120 min, the degradation rate of the methyl orange aqueous solution could be up to 98.27%.
Research of 3D Machining Procedure Model Parameterized Modeling Method
Authors: Zhang Dong Liang , Mo Rong , Wan Neng , Qiao Hu
Published: October 2011

To achieve the purpose of machining process design base on 3D models，it is proposed a procedure modeling method with allowance figure in this paper. At first, the parameterized modeling process of 3D machining procedure model is presented, and the modeling method with allowance figure is described in detail. Then, the Petri model mapped to the modeling process of 3D machining procedure is created and illustrated. At last, through an instance, it declares that technologist can use this method to create a group of 3D machining procedure parameterized models that contain the inter-part correlations.
Research of Optimization Methods in Recruitment
Authors: Fang Feng , Li Shi Gui
Published: October 2011

In various business unit of recruitment enrollment,how to quantization admitted as compliance with a post requirement of applicants, as well as possible personnel employed skills and potential, to create greater efficiency, is faced with various business unit in front of an important issue. Therefore, a thinking method and mathematical model of recruitment admission scheme is put forward using a concrete example, hoping for dealing with such practical problems help and enlightenment.
Research on Algorithm of Conflict Detection and Resolution in Three-Dimension Free Flight Based on Genetic Algorithms
Authors: Shu Hong Ping , Li Kui , Cao Liang
Published: October 2011

The research 3d environment of Free Flight is discussed, the substance of the conflict detection and resolution in 3d Free Flight based on genetic algorithms is studied, and a mathematical model is constructed in the paper. The emulation results of applications show that the genetic algorithms is suitable and positive to detect and resolute the conflict in 3d Free Flight. The flight courses of aircrafts, which are as close as possible to the theoretical direct flight course of the least-fuel-consumption, can be generated by genetic algorithms.
Measurement and Analysis of Summer Outdoor Thermal Environment of Campus Open Space in Guangzhou
Authors: Chen Guang , Zhao Li Hua , Li Qiong
Published: October 2011

Open space is an important part of Campus, also has an important influence to the thermal environment of campus. The measurement of summer outdoor thermal environment of campus open space showed that: the piloti can effectively improve the thermal environment in hot summer; underlying surface materials, sky view factor has a great influence on the outdoor thermal environment. Using appropriate surface structure, increasing piloti and increasing square shading are suggested as outdoor thermal environment optimizing measures based the measure results. Advices were given for hot environment design and passive energy saving design
Simulation Research of the Influence of Random Phase Disturbance on MVDR Beam Former
Authors: He Yun Feng , Song Gao Shun , Wang Chang Ming , Jiao Jun Sheng
Published: October 2011

In practical sonar engineering, the random phase disturbance error will be existed in the output signals of every channels of hydrophone because of the complexity of ocean diffuse environment and the disturbed beam. So only the statistical methods can be used to analyze these errors. By this way, the influence of the different output signals of every channels of hydrophone on MVDR Beam former and the array gain is researched, and also the computer simulation is completed.
Study on Traditional Vernacular Dwelling in China's Water Towns
Authors: Fang Mao Qing
Published: October 2011

At Jiangnan area, the south of the lower reaches of the Yangtze River, the water towns in where people live with a cultured life super abounded with resources and products, the traditional vernacular dwelling has made a reputation by their unique characteristics. The paper studies on the dwelling in the water towns, and presents to readers the changes the dwelling have gone through from the Hemudu culture in the New Stone Age to today. Through the research and analysis on the type and components in the local dwelling, this author brings about the characteristics of the dwelling and comes up with ideas of dwelling protection in the water towns.
Supplier Classification Based on Artificial Immune System Clustering Algorithm
Authors: Yang Shu Xia , Ding Hui , Liang Wan Hua
Published: October 2011

The theory of artificial immune system cluster analysis was studied firstly, the real encoding artificial immune system cluster analysis process was put forward, Then identify indexes of supplier classification were confirmed. Finally, according to a power company some supplier data, supplier were classed, using the cluster analysis with artificial immune system. Suppliers were divided into three categories: the first group includes 3 suppliers, 4 and 3 suppliers for the second group and the third group respectively. The results show that the calculation process of Artificial immune system clustering algorithm is simple, This method can minimize the requirements of professional knowledge and it is suitable to large volume of data while it is not sensitive to the different data order at the same time. So the artificial immune system cluster algorithm has many advantages in obtaining the optimal solution, and the artificial immune system cluster algorithm is feasible to be used in supplier classification.
The Experimental Study on a New Learning Method Based on Feedback Theory
Authors: Tang Hong Mei
Published: October 2011

In connection with the current problem of college students’ not very high learning efficiency, this research, based on feedback theory, aims to investigate the effects of Active Input and Active Output Learning Model on them. The author of the research has once done a four-month experiment on 36 first-year students of a certain university, the result shows that compared with the control class, the experimental class has a remarkable learning result. The research indicates that in the current non-immersion leaning environment, the active input and active output leaning method will not only help learners to form new acquisition of language, improve comprehensively their discourse behavior, but also to spur on learners to make use of all their resources to solve communicative problems. College students, who adopt such learning methods, show a higher enthusiasm and stronger confidence.
The Dynamic Response of Q345 Steel at High Strain Rates and High Temperature
Authors: Hao Peng Fei , Hou Xiao Bo , Gao Jia Zhi , Liu Yong , Shu Xue Feng
Published: October 2011

Mechanical properties of Q345 steel used for industrial structure under high strain rate and high temperature loading conditions such as rocket launching are required to provide appropriate safety assessment to these mechanical structures. The split Hopkinson pressure bar (SHPB) technique with a special experimental apparatus can be used to obtain the material behavior under high strain rate loading conditions. In this paper, dynamic deformation behaviors of Q345 steel under both high strain rate compressive and high temperature loading are determined using the SHPB technique.
Tunnel Seismic Wave Field Simulation Using Finite Element Method
Authors: Wang Zhao Ling , Liu Zheng Ping , Zhang Chi
Published: October 2011

In the paper, two-dimensional Tunnel seismic Wave field is Simulated with finite element method, and the in the tunnel model with fault zone load Ricker wavelet source on the workface, compared the case of wave propagation according to wave field snapshot and time record, can intuitively, accurately reflect the characteristics of seismic wave propagation in tunnel seismic prediction with geological disasters such as the fault zone and so on.
Research on Situation Evaluation Based on Artificial Immune for Network Security
Authors: Zhang Rui Rui , Xiao Xin
Published: October 2011

As a new research area of network security, network security situation evaluation is significant for achieving large-scale network security monitoring. In this paper, the artificial immune technology is applied to the study of situation evaluation for network security. Mathematical expressions of immune elements such as antibodies, antigens are established, and basic immune mechanism such as self-tolerance, clone selection, immune memory are achieved. According to the relationships between concentration changes of antibodies and attack intensity of pathogens in biological immune system, a situation evaluation model for network security is proposed. In addition, this paper adopts the uncertainty reasoning method in the cloud theory to make multi-granularity analysis for network security situation. By modeling the security situation indicator, and using cloud rules generator and reverse cloud generator, we can get qualitative results of hosts and network's security situation. Theoretical analysis and experimental results show that the model is effective to evaluate situation for network security with advantages of real-time, adaptability and high accuracy.
The Research on the Improved CMG Tool for Al2O3 Ceramic
Authors: Dai Heng Zhen , Jin Zhu Ji , Gao Shang , Tao Zhan Chun , Huo Feng Wei
Published: October 2011

A new D/SiO2 CMG tool for Al2O3 ceramic process was developed by adding some diamond abrasive into SiO2 CMG tool. The solid state reaction between the CMG tool and Al2O3 ceramic played a key role for achieving ultra-precision, high efficiency and low damage.Three kinds of formulations for the D/SiO2 tool were tested and evaluated. The material removal rate(MRR) of Al2O3 ceramic mainly depended on the content of diamond abrasive. In contrast with the corresponding SiO2 tool,the D/ SiO2 tool, which had minimal content of diamond abrasive,could achieve a minimal Ra and better MRR. The enhanced mechanical removal action made the MRR improve nearly twice times, and the process surface roughness of Al2O3 ceramic specimen using the D/ SiO2 tool kept almost same value as using the SiO2 tool without surface damage. Thus the D/ SiO2 tool is more suitable for process of Al2O3 ceramic workpieces.
Transverse Stress for the Elastic-Plastic Plane Strain Problems
Authors: Tian Chang Lu , Wang Shu Li
Published: October 2011

A relation to determine the transverse stress in terms of in-plane stresses for elastic-plastic plane strain problems in a power-law hardening material is presented. The results might prove useful in the elastic-plastic analyses of plane strain problems
A Design of Face Detection and Facial Expression Recognition Techniques Based on Boosting Schema
Authors: Kao Chang Yi , Fahn Chin Shyurng
Published: October 2011

During the development of the facial expression classification procedure, we evaluate three machine learning methods. We combine ABAs with CARTs, which selects weak classifiers and integrates them into a strong classifier automatically. We have presented a highly automatic facial expression recognition system in which a face detection procedure is first able to detect and locate human faces in image sequences acquired in real environments. We need not label or choose characteristic blocks in advance. In the face detection procedure, some geometrical properties are applied to eliminate the skin color regions that do not belong to human faces. In the facial feature extraction procedure, we only perform both the binarization and edge detection operations on the proper ranges of eyes, mouth, and eyebrows to obtain the 16 landmarks of a human face to further produce 16 characteristic distances which represent a kind of expressions. We realize a facial expression classification procedure by employing an ABA to recognize six kinds of expressions. The performance of the system is very satisfactory; whose recognition rate achieves more than 90%.
A Method to Solving a Kind of Nonlinear Cyber-Security Equations
Authors: Zhou Wei , Li Qian Mu , Zhang Hong
Published: October 2011

A method to get numerical solutions to Nonlinear Cyber-Security Equationss with the the N algorithm is proposed . This paper especially focused on its converging rate and application. Also, It did some comparison between with other universal algorithms. Both mathematical method and experimental method are used to do the comparison. This paper gave strict mathematical proof and also used the results we got from our program to draw a solid conclusion.
A Simple Frost Model for Calculation of the Frost Thickness over Ground Aircraft Surfaces
Authors: Wang Li Wen , Xu Dan Dan
Published: October 2011

In this study, a simple model that describes frost formation over ground aircraft surfaces is presented. The model uses the data of the aircraft surface temperature, air temperature and air velocity to predict the frost thickness. The frost surface temperature and the frost thickness under different atmospheric conditions are investigated. The results indicate the frost thickness increases with the air velocity and the air temperature, decrease with the surface temperature. This model enables forecast of the frost formation over ground aircraft surface.
An Exploration on Modeling Design Method of Sprinklers Based on Rhinoceros Platform
Authors: Zhu Yun Feng
Published: October 2011

This paper proves the feasibility of Rhino, a computer aided design software, in modeling design of sprinklers, through an analysis in the establishment of sprinklers’ chassis and an example of 3D modeling, and promotes a general method of shell modeling design of sprinklers based on Rhino.
An Improved BP Algorithm Based on Steepness Factor and Adaptive Learning Rate Adjustment Factor
Authors: Zhang Xiu Hua , Ren Fu Jun , Jiang Yong Cheng
Published: October 2011

BP network is the most widely used of the neural net work model, but there are many problems of slow convergence speed and easily getting into the local minimum in the conventional BP algorithm. For this, an improved algorithm is proposed. Momentum term is added, steepness factors are introduced and adaptive learning rate adjustment factor is added. In the Matlab platform simulations are carried out by each improvement methods on the same BP neural network. The results show that: Convergence of improved BP network is decreased from 1000 to 49 and the error is decreased from 10-2 to 10-6. The convergence speed has been significantly improved and the error has been decreased. Using the synthesis improvement method effect is obvious and it provides a good theoretical basis for the practical application.
Enterprise Resources Planning Sand Table Training for Engineering Students
Authors: Han Xiao Ting , Niu Li
Published: October 2011

In order to cultivate engineering students to become not only professional but also mastering management theory and practice, ERP sand table training is an essential practice teaching content. This paper presents the necessary of engineering students learning ERP sand table simulation course, and proposes a specific solution of ERP sand table training setting according to characteristics of engineering students. Finally, investigation data shows the efficiency of ERP sand table training.
Design of Test Parameters during Assessment of Material Safety Fitness for Purpose in High Temperature High Pressure Sour Gas Field
Authors: Zhi Zhang , Shi Tai he , Fu Jian Hong
Published: October 2011

The design or assessment method to identify the safety of all the materials or components in accordance with the specific service environment is called design or assessment method for applicability. The assessment method for material applicability is set forth in Standard API 579.The most important step in applicability design is to simulate the practical conditions on the site as close as possible. However, limited by material, manufacturing level and cost, etc., it is hard to simulate the real environment in the laboratory test. Therefore, the testing condition and method should be designed scientifically to allow the testing result to close to the practical condition as much as possible. At present, as for the design of the gas component, the content of each component during the test is designed based on the principle of partial pressure equalization of corrosive component according to the actual pressure and the gas components on the site. But the author assumes that the principle of dissolved amount equalization for the corrosive components in the solution shall be adhered to in the process of applicability assessment. The paper mainly introduces the method to calculate the partial pressure of each component, the model to calculate the solubility of the corrosive components in the solution, and finally gives the example of calculation and points out the problem existing in the partial pressure equalization principle.
From Seeing to Painting - An Analysis on the Characteristics of Pen Drawing Education at Chinese Architectural Universities
Authors: Song Nan
Published: October 2011

One of the import functions of pen drawings for designs is to take our design ideas onto a piece of paper so that we can look at it in a different way, and re-consider it after self-examination. Just like playing a piece of music with different musical instruments gives people different impressions, different drawings for a design make people have different understanding toward an design idea. This paper introduces to the readers how to deliver an image via pen in architectural design, including through intuitive picture representation, thoughts-oriented picture representation, communicative picture representation, and how to apply the method throughout the whole designing process.
Image Defogging Based on Fog Veil Subtraction
Authors: Xie Bin , Guo Fan , Cai Zi Xing
Published: October 2011

In this paper, we propose a new defog algorithm based on fog veil subtraction to remove fog from a single image. The proposed algorithm first estimates the illumination component of the image by applying smoothing to the degraded image, and then obtains the uniform distributed fog veil through a mean calculation of the illumination component. Next, we multiply the uniform veil by the original image to obtain a depth-like map and extract its intensity component to produce a fog veil whose distribution is according with real fog density of the scene. Once the fog veil is calculated, the reflectance map can be obtained by subtracting the veil from the degraded image. Finally, we apply an adaptive contrast stretching to the reflectance map to obtain an enhanced result. This algorithm can be easily extended to video domains and is verified by both real-scene photographs and videos.
Key Technologies of Development of Intelligent Overall Layout Design System for Bus Body
Authors: Chen Jing Xin , Chen Jing Xian , Zhang Jing
Published: October 2011

Based on the requirements and characters of overall layout design of bus body, development process, overall structure, function module and deduction network of Intelligent Overall Layout Design System for Bus Body were built. It is illustrated systematically how the object-oriented modeling technology, deduction technology based on knowledge, secondary development technology based on CATIA, three dimensional parametric modeling methods and technology of database access etc were applied to the design and development of the system. The function of the system was verified through a case of specific bus body overall layout design.
Logistics Professional Training under Mass Customization
Authors: Wei Guang Xing , Qin Yan Hong
Published: October 2011

This paper analyzed problems exists in the modes of logistics management professional of certain college in the first place, and then the new mode of professional training concept is proposed based on the modularity and postponement in mass customization so as to enrich the knowledge structure of most logistic management students, reduce the complexity of teaching management, and meet the changing various demands of employer companies.
My Viewpoints on the Construction of China’s Petroleum Enterprise Culture
Authors: Ma Yu , Fan Yi Ming
Published: October 2011

This article analyzes the current phenomena of enterprise culture construction, and it points out the existing shortcomings as well as its reasons. In consideration of the current condition of petroleum enterprise, it puts forward several suggestions. This article also has an important reference value to the current efficient construction of petroleum enterprise culture As is known to us all, oil is one of the most important energy at present, and the petroleum enterprise has a pivotal position in our country's economic field. Enterprise culture research is booming now, but its theoretical summary is still very weak. Although there have been many papers study on the petroleum enterprise culture, the research has still found some worried phenomena, such as, the overall number is less , the study is insufficient, and the contemporary condition of petroleum enterprise culture is not good enough. This article aims to find out proper ways to promote the construction of petroleum enterprise culture.
Study on the Crack Initiation Criterion in Fretting Fatigue of LZ50 Steel
Authors: Ping Xue Cheng , Yingb Shao Jun , Liu Xin Yu
Published: October 2011

Fretting-fatigue often occurs at the contact area between two materials. There exist strong stress singularity exist at the contact edge, crack usually initiation at here. In this paper, the singular stress fields near the contact edge is obtained by using commercial code ABAQUS, then, the curve fitting method is used to determine the stress-singularity order and stress-strength parameter. Finally, the criterion of fretting-fatigue crack initiation in LZ50 steel is determined by using stress-strength parameters.
Simulation of Optical Properties of Mn-Doped ZnO Based on Density Functional Theory
Authors: Li Teng , Yang Shi Liang , Wang Wei Kui , Wei Yan , Zhang Qing
Published: October 2011

The electronic structures and optical linear response functions of ZnO are calculated. The relationships between electronic structures and optical properties are investigated by using first-principles based upon the density functional theory. The dielectric functions , reflection spectra ,refractive index and of ZnO dominated by electron inter-band transitions are analyzed interms of the precisely calculated band structure and Conductivity density of state. Furthermore, we analyzed the change of electron structure, bonding and optical properties after doping in comparison with the experimental results. The theoretical results offering theoretical data for the design and application of optoelectronic materials of ZnO. Meanwhile , the calculated results also enable more precise monitoring and controlling during the growth of ZnO material .
Mechanics Model and Experimental Researches on Hydraulic Expansion Lining of High Pressure Reactor
Authors: Chen Hai Hui , Yang Guo Jun
Published: October 2011

New hydraulic expansion technique was invented, and conjoint results were also estimated. High pressure reactor’s overall water pressure test is used to expand lining plastic deformation, and then eliminate the gap between lining and shell. According to elastic-plastic theory, the mechanics model was induced. The conjoint result was estimated by measured layer gap, stress and strain. The results show that theoretical calculation is basically consistent with actual results, the biggest error is 13.8%; although the biggest preliminary gap reaches 16mm, remnant gap is only 0.6~0.9mm after hydraulic expansion; during pressure increase test, shell material always keeps elastic. Lining and shell almost become an integrated material after the initial pressure more than 3.1MPa, the linearity between cylinder stress and initial pressure is more than 0.99.
An Integration of Military Electronic Equipment and Flexible Test Technology
Authors: Niu Gang , Chen Guo Shun , Wang Pei Yuan
Published: October 2011

Aimed at the characteristics that military electronic equipment has applied numerous technologies, many kinds of tested signals, the demands of test system’s accuracy and expansibility. Researched the test system based flexible test technology; the design ideas are structure modularization, electric interface standardization and software modularization. Especially analyzed modularization design, redundancy or parallel channels, calibration and system function test loop, flexible test can be applied well in the filed of military electronic equipment support.
Relative Threshold-Based Positioning Adaptive Algorithm for Real-Time Machine Vision
Authors: Xia Yu Bin , Guo Zhong Wei
Published: October 2011

For the traditional machine vision, positioning algorithms are usually less efficient and more complex, the author proposes a relative threshold-based positioning algorithm for real-time machine vision. Firstly, the algorithm thresholds the template and sample images with a relative threshold. So it can not only effectively impact the influence of uniform illumination, but also reduce the volume of data. Then it uses the two-floor image pyramid method to greatly reduce the computation amount and uses the adaptive step method further to accelerate the matching speed. The algorithm nears to the object by the rough matching, and then navigates to the object center through a precise matching. While greatly improving the matching speed it ensures the accuracy. The experiments show that it can meet the real-time requirement.
Fuzzy Auto-Tuning Techniques Applied to Air-Fuel Ratio Control on a Lean Burn Engine
Authors: Wang Li , Zhang Wei Yu , Pei Yi Qiang
Published: October 2011

Lean burn technology shows great potential in meeting the more strict emission regulation and realizing high efficiency and clean combustion. In this paper, a feedforward-feedback control system of the air-fuel ratio controlling for lean burn engine is presented. A fuzzy parameter self-tuning PID control scheme is used as feedback to balance the control accuracy and system complexity. Some lean burn engine air-fuel ratio control experiments are given to show the efficiency of the proposed method. With the proposed control system, the the actual engine air-fuel ratio can quickly track the desired air-fuel ratio when the engine load changes suddenly regardless of whether the target air-fuel ratio is 20 or 14.6. So, the fuzzy parameter self-tuning PID controller has excellent control performance under transient condition of lean burn engine.
Processing Research for Unequal Diameter Machining Cylindrical Cam
Authors: Ma Chao , Wang Bin , Ma Wen Bin , Wang Bing , Li Ruo Lei
Published: October 2011

For unequal diameter machining cylindrical cam profile based on double envelope principle, the practical profile equation and the profile machined by tool equation were given. The purpose of this study is explore new unequal diameter machining cylindrical cam method in the range of allowable error. According to the practical profile equation, the unequal diameter machining profile of cylindrical cam based on double envelope principle experiment were carried out. Considering the problem of accurate machining, three different diameter tool is used in the same cylindrical cam blank . And then, we used the software - Manufacturing Engineer XP to Program unequal diameter machining cylindrical cam Surface processing. The last, cylindrical cam surface was processed by CNC machining center.
The Fault Location Approach for Grid Network Base on MAS of Rough Set Theory
Authors: Ma Wen Bin , Ma Chao , Zheng Gui Xing , Zhao Rui
Published: October 2011

With distributed power access, Network reconfiguration and other technology, Traditional power system fault diagnosis and fault location of large-scale grid has some limitations. This paper proposes a fault location method for Smart grid base on MAS of Rough Set theory. To solve the issues that the fault diagnosis decision-making needs load computational capacity and flexible network structure mutations. The method uses the group decision-making feature of Agent; divides the network area into the associated regions by the matrix for described the network area, then using rough set theory to a small area fault location in the node sets. The method combines the characteristics of a distributed network that the parallel processing of MAS and easy to expand and modify. Fault location by it has better flexibility and faster reaction speed.
Research on Closed-Loop Control of the Step Response
Authors: Wang Xin Ping , Dang Jian Jun , Zhao Zhi Cao
Published: October 2011

Based on the analysis of six kinds of working points, the process function of torpedo thermal power propulsion system is solved. The results show that the process transfer function is approximate to inertial link. PI control algorithm is presented and its parameters are deduced. The algorithm can not only control the output variables, but also can monitor the intermediate variable. Closed-loop control system model is established. Variable speed characteristics of torpedo at constant depth and steady speed characteristics in depth-changed process are simulated by MATLAB. Simulation results indicate that the system has satisfactory dynamic performance and the control quality performs well.
Limit Analysis of Defect-Free Pipe Elbow under Internal Pressure with MY Criterion
Authors: Zhang Shun Hu , Zhao De Wen , Gao Cai Ru
Published: October 2011

With MY (mean yield) criterion, the limit load of defect-free pipe elbow under inner pressure is analyzed, and an analytical solution is first obtained. The solution shows that the limit load is a function of wall thicknesst, average radiusr, yield strength as well as curvature radiusR0. The limit load increases with the increase of the curvature radiusR0and will get the same value with the burst pressure of straight pipe ifR0→∞. The limit load calculated by the solution is compared with those based on Tresca, Mises, as well as TSS yield criteria. It is also concluded that Tresca criterion predicts a lower bound to the limit load, while TSS criterion predicts an upper bound one. However, the limit load based on the MY criterion lies just between the TSS and Tresca solutions, most notably, the MY criterion almost has the same prediction precision with Mises solution.
Semi-Physical Acoustic Vision Simulation System of Autonomous Underwater Vehicle
Authors: Zhang Tie Dong , Ma Shan , Wan Lei , Pang Yong Jie
Published: October 2011

Semi-physical acoustic vision simulation system of autonomous underwater vehicle (AUV) was established by combining physical simulation of decision layer with virtual simulation of sensory and executive layer. The hardware and software architecture of the simulation system were explained in detail. The virtual simulation of sonar sensor and the design of sonar vision processing system of the physical simulation were described. Finally, the long distance obstacle avoidance simulation, special objects search simulation and multi-objects tracking simulation tests were conducted to demonstrate the importance of the system to the success of sea experiments.
Study on Control Parameters in the Acceleration of Axial Flow Blood Pump
Authors: Xie Xiong , Tan Jian Ping , Liu Heng Tuo , Liu Yun Long , Tan Wei , Tan Zhuo
Published: October 2011

Based on the research of dynamic characteristics of axial flow blood pump which is drove by the large gap magnetic drive system, a serial communication between PC and AT89C51 to realize the real-time process of the blood pump acceleration is proposed. The acceleration control parameters are decided by the analysis of blood pump speed control mechanism. As a result, Previous, the previous program which is modified to change the control parameters repeatedly is saluted by building the PC model. At the same time, the control of multiple control parameters could be achieved when a program on the microcontroller is addressed. What’s more, the more experiments will be realized, to provide more conveniences to the system.
Study on Overhead Crane Anti-Swing System with Self-Adjustable Fuzzy Control
Authors: Ye Ding , Jin Wei , Li De Cai
Published: October 2011

As for shortcomings of PID and modern control method in crane anti-swing system, we introduce the fuzzy theory to the crane anti-swing on base of analyzing the crane trolley’s moving dynamic model. The cooperation between the position fuzzy controller and swing fuzzy controller achieve the goal. We use the fuzzy control system of self-adjustable quantization factors and scale factors to solve the problem that have the oscillation in limit areas causing the load lasting swing during the trolley moving position control. According to the simulation, it can solve the problem and eliminate the steady-state error completely and improve enhance the adaptivity of system. It can make the trolley reach the designation in 15s and keep the load steady.
The Construction and the Management of Electric Vehicle Charging Network
Authors: Fu Xiang , Yao Jia
Published: October 2011

Firstly, this paper proposed that charging network for Electric Vehicle (EV) should be consisted of the special motorcade charging system and general charging system mainly, and the emergency charging system auxiliary. This paper put forward the suggestions that EV charging network construction should carry on with EV development synchronization, give full play to advantages of dispersion charging, charging avoiding peak load and charge in valley load, instead of laying a large-scale charge-station network. Secondly, this paper discussed the construction and the management of charging network, focused on the network planning, charging standards, and the role of power enterprises. Finally, the pattern of charging operation and the management is chosen, three kinds of patterns are proposed to different periods and users, the centralism charging management pattern, the dispersion charging and centralism maintenance pattern, as well as the battery renting pattern.
The Construction of Network Virtual Laboratory for Measurement and Control Technology of Panzhihua University
Authors: Huang Kun
Published: October 2011

First of all, with the actual situation of measurement and control technology laboratory in Panzhihua university, this paper put forward a construction idea of LabVIEW-based measurement and control technology virtual laboratory, and construct the basic experiment modules and the comprehensive experiment modules. And then, the paper describes the key technologies of the network virtual laboratory, gives the overall structure design and the website function module design of network virtual laboratory for the measurement and control technology.
Optimization for Dynamic Performance of the Fiber Optical Voltage Transformers
Authors: Li Hui , Bi Lan , Feng Xiu Juan , Li Bing Jun , Zhang Chun Xi
Published: October 2011

Concerning the effect of the parameter uncertainty caused by environmental temperature, we present a robust control algorithm for the fiber optical voltage transformer (FOVT) to achieve optimized dynamic performance. The principle of the FOVT based on closed-loop detection is analyzed and the system model is established. Based on the system model and the optimized dynamic performance index, the robust controller is investigated to suppress the effect of the forward gains variation. Furthermore, we give a design criterion in terms of linear matrix inequality (LMI) for the proposed control. Finally, the experimental results show that the control has strong robustness against parameter uncertainty for improving the dynamic performance of the FOVTs.
Optimization of Vehicle Tailpipe Hook Stiffness
Authors: Zhu Pin Chang , Tan Gang Feng
Published: October 2011

There are problems with the tailpipe hook when the car is in durability test. In the paper, the exhaust system vibration analysis model is built first. It is found that the constraint force on the tailpipe hook which is cracked is bigger and the local stiffness is lower according to the frequency response analysis. After the structure optimization, the stiffness of the tailpipe hook is strengthened. Both the comparative analysis and idling test show that the optimized hook could explicitly reduce the vibration of the exhaust system which transfers to the car floor and improve the fatigue life of the exhaust system. The optimization method could be used for the similar fatigue problems.
Development the Cam Design System Based on VC++
Authors: Ma Zong Zheng , Wang Xin Li
Published: October 2011

Based on the VC++ development environment, a program about the procedure of cam design is developed. First, build up the input interface for input parameters, output values and curve display such as velocity and acceleration according to the input parameters. Then the system is validated by comparing the values using the single-step debug operation. The results show that the cam design system can be run and give help for cam design application.
Colorful Limit Fractal Patterns with Evolving Planar Symmetry from Dynamics
Authors: Lu Jian , Zou Yu Ru
Published: October 2011

Building upon our previous work for automatically creating colorful patterns with planar symmetries, we study mapping these symmetric patterns into fascinating limit images having evolving symmetry from dynamical systems. The method can be used to automatically generate a great variety of artistic patterns.
Design of H∞ Robust Control for Shunt Active Power Filter Based on the Mixed Sensitivity Method
Authors: Jia Chen Xi , Wang Chong Lin , Huang Qian
Published: October 2011

To aim at the characteristic of APF subject to external interference and at model uncertainty，a robust controller has been designed for the active power filter model based on the mixed sensitivity method, which is derived from control theory. We carried out several studies which have demonstrated that the controller is independent on the plant mode and the effect from the system uncertainty and disturbance can be greatly eliminated by the controller ，And thus can ensure both the internal stability and the robustness of the system. The digital simulation can prove the performance of the controller by MATLAB.
EEG Signal Classification by Global Field Power
Authors: Duan Li Juan , Wang Xue Bin , Yang Zhen , Zhou Hai Yan , Wu Chun Peng , Zhang Qi , Miao Jun
Published: October 2011

Our project focuses on the emotional face evoked EEG signal recognition. Since EEG signals contain enough information to separate different emotional facial expressions. Thus we propose a new approach which is based on global field power on EEG signal classification. In order to perform this result, firstly, we gather a dataset with EEG signals. This is done by measuring EEG signals from people aged 20-30 that are stimulated by emotional facial expressions (Happy, Neutral, Sad). Secondly, the collected EEG signals are preprocessed through using noise reduction method. And then select features by principal component analysis (PCA) to filter out redundant information. Finally, using fisher classifier and a 10-fold cross validation method for training and testing, a good classification rate is achieved when combination local max global field power EEG signals. The rate is 90.49%.
Human ADL Signal Transmission System Optimization Method Using Bayesian Network Based on Wireless Sensor Network
Authors: Sun Ying
Published: October 2011

A optimization method of human-body ADL(activity of daily living) real-time monitoring system design method based on wireless sensor network is proposed, which is able to detect elderly people body posture and biological signal at rehabilitation centers and nursing homes and doctor or their family can know patients’ body state through mobile phone or PC. The number of nodes in each base station increase can cause network congestion. A optimization data transmission algorithm based on Bayesian network is presented, and sensors under the Bayesian network distribution model and algorithm are built. Finally, experiments results indicate that system’s real-time performance is improved and parameters of Bayesian network training method is effective.
Sustainability-Oriented Product Modular Design Using Design Structure Matrix (DSM) Method
Authors: Yan Ji Hong , Feng Chun Hua
Published: October 2011

With increasing sustainable development consciousness, sustainable design plays an important role not only in design phase but also in manufacturing process. This paper proposes a modular design methodology for achieving sustainable design as well as fulfilling functional requirements. Factors related to function and sustainability of products such as material, manufacturability, component life and so on are defined as modular drivers. Design structure matrix, a structured method which has advantages on representing and analyzing interaction relations among system elements, is employed to establish correlation matrix between components. K-means algorithm is used to integrate the basic components into design modules based on their correlation distance. Furthermore, an evaluation model is established for assessing sustainability of modular products. Finally, a reduction gear is used as a case study example.
The Design of Constant-Flow Bump Control System Based on BP Neural Network
Authors: Wu Zheng Ping , Chen Yun Bo
Published: October 2011

The advantages and disadvantages of the current constant-flow control method for the constant-flow pump (CFP) are analyzed. By using the experimental data and the BP neural network (BPNN), the model between outlet pressure and flow loss coefficient established. In order to realize constant-flow control for the CFP, a feed-forward controller based on the model is set up finally. Experiments show that this controller can improve the flow control accuracy for the CFP greatly.
IMC-PID Design with Time Delay Compensation for Multivariable System Based on V-Norm Decoupling
Authors: Cao Li Ting , Jin Qi Bing , Su Wei , Fan Tong Shun , Yu Guan Hua
Published: October 2011

An IMC-PID based on V-norm decoupling for multivariable stable process with time delay was proposed in this paper. Previous multivariable IMC is usually designed after the decoupling of the process, however the industrial process modeling is difficult to be precise, so the controller design is often not ideal after decoupling. The method in this paper designs both the decoupling and controller at the same time, the IMC is not only a controller, but also a decoupling compensation. A filter parameter optimization method based on a new performance function was adopted. The controller can be realized by time delay compensation when there is an advance part. The IMC-PID designed by this method has strong robustness when the model is mismatch and excellent performance both in decoupling and control. The simulation results show that the method is very effective and has a wide range of application in actual industry area.
The Design and Implementation of a Communication Mechanism of Centralized Body Control Module
Authors: Hu Yue Li , Wang Kun , Sun Bin
Published: October 2011

The current status and the future development trend of the body control modules are analyzed by this paper, and a new design idea of the centralized body control module based on the ARM-MCU and the Linux operation system is presented. Also the communication protocols between the main controller and the sub-nodes, the communication interfaces between ARM and MCU, and the operation interfaces on the touch screen are researched. Based on the teamwork of the ARM9 and the 16 bits MCU, the Linux OS is embedded to make the control of body network much more centralized, efficient and faster.
Improved EEMD Applied to Rotating Machinery Fault Diagnosis
Authors: Chen Lue , Tang Ge Shi , Zi Yan Yang , Fan Fei
Published: October 2011

Ensemble Empirical Mode Decomposition (EEMD) is a new noise-assisted data analysis (NADA) method. The effect of EEMD depends on two key parameters which are the amplitude of white noise and the ensemble times. However, the shortcoming of EEMD is that it lacks adaptability and reliability because these two key important parameters are obtained by experience and human intervention. An Improved Ensemble Empirical Mode Decomposition method is proposed in this paper, by adding white noise and ascertaining ensemble number adaptively. The criterion of adding white noise in Improved EEMD is established, by which a composite simulation signal could be adaptively and accurately decomposed into IMFs without mode mixing. The proposed method is applied to a gear fault detection of hot strip finishing mills. The result shows that Improved EEMD method successfully extracts the gear fault feature with high precise diagnosis results.
Improved Wavelet Algorithm on Image Denoising Processing
Authors: Lin Zhen Xian
Published: October 2011

Wavelet image de-noising has been well acknowledged as an important method of de-noising in Image Processing. Lifting scheme is not only a fast algorithm of existing wavelet transforms, but also a tool to produce new wavelet transforms. In this paper, the principle of several wavelet de-noising algorithms are described, and we compares with these algorithm, gives three kinds of improved algorithm. The simulation experiment shows that it is practicable and effective.
Intelligent Control Method of Ground to Air Missile Based on FCMAC
Authors: Li Gang , He Hao , Fang Gang , Wu Jian Feng
Published: October 2011

Intelligent control methods of missile guidance and control system (GACS) are studied in this paper. Secondly, the component and principle of GACS is introduced. Based on the fuzzy neural network, this paper constructs a basic structure of the intelligent control method of missile. Meanwhile, a new intelligent control method of rolling channel of missile based on Fuzzy Cerebella Model Articulation Controller (FCMAC) is designed. Under complicated environmental conditions, the missile can be accurately controlled with this method. Finally, the application value is illustrated. It’s very meaningful to improve the combat capability.