bluuebunny/crossref_metadata_2025 huggingface dataset:
Colon-Targeted Drug Delivery Microparticles Prepared Using Electrohydrodynamic Atomization
Authors: Yu Deng Guang , Wang Xia , Lu Ping , Chen Xiao , Zhao Hui Peng , Li Xiao Yan , Qian Wei , Li Ying , Liao Yao Zu
Published: October 2011

Electrohydrodynamic atomization (EHDA) process was exploited to prepare drug-loaded microparticles for colon-targeted drug delivery. Field emission scanning electron microscope results showed that the particles had a size of 1.3±0.7 μm. Differential scanning calorimetry (DSC) analyses and wide-angle X-ray diffraction analyses (XRD) results similarly demonstrated that the drug DS had been totally converted into an amorphous state in the EHDA microparticles with Eudragit® L-100 as the polymer matrix. Attenuated total reflectance Fourier transform infrared analysis disclosed that the secondary interactions presented between DS and Eudragit® L100 molecules. In vitro dissolution tests verified that the microparticles had a pH-dependent and sustained drug release profile. The present study provides an easy way for developing colon-targeted drug delivery microparticles.
Upwinding Meshfree Point Collocation Method for Unsteady Magnetohydrodynamic Flow at High Hartmann Numbers
Authors: Cai Xing Hui , Shi Cheng Ying , Wang Guo Liang
Published: October 2011

In this paper, a meshfree point collocation method, with an upwinding scheme, is presented to obtain the numerical solutions of the coupled equations in the velocity field for the unsteady magnetohydrodynamic (MHD) flow through a straight duct of rectangular section with insulated walls. Computations have been carried out for the unsteady MHD flow, which is under the external applied magnetic field of arbitrary orientation, of different Hartmann number from 5 to 106 and at various time levels. As the adaptive upwinding local support domain is introduced in the meshless collocation method, numerical results show that the method can compute MHD problems with Hartmann numbers up to 106 with good accuracy. The results also show that as Hartmann number increases, the time needed to reach the steady state decreases.
Study on Fuel Economy and Exhaust Emission of Lean-Burn PFI Engines
Authors: Yuan Xing Bo , Li Zhi Jun , Chen Shao Shu , Zhang Ying
Published: October 2011

Lean-burn engines operate at a very lean air-to-fuel (A/F) ratio under light-load and part-load regions, in order to analyze the effect of engine speed and load on the BSFC (Break Specific Fuel Consumption) and exhaust emission of Lean-burn engine, an experimental research was conducted on a 4 cylinder lean-burn gasoline engine using different A/F ratios. The results show that the CO emission level decrease significantly, HC emission level becomes lower at the same A/F ratio, while the NOx emission increases, hence, advanced technologies are needed to carry out the NOx storage and purge operations in the lean-burn engines. Additionally, the experiment also reveals that the BSFC becomes lower as the engine speed and load increase.
The Design and Simulation of Predictive Control Algorithm Achieved by the DCS Algorithm Module Combination
Authors: Quan Qian Qian
Published: October 2011

This paper proposes a design method and parameter tuning method for how only using the DCS configuration control software module to combine and achieve generalized predictive control algorithm in a complicated controlled plant case. In order to show the effectiveness of the control algorithm using the DCS layer control software module to achieve model predictive, two types of complex objects are considered as example to do simulation : non-minimum phase process and the complex process with recycling and pure delay. The simulation results show that the proposed control algorithm can provide similar control performance of GPC.
Structure Optimization of Space Helix TWT Based on Thermal Analysis
Authors: Ruan J.F. , Yang J. , Lv G.Q. , Deng G.S. , Liu L.
Published: October 2011

The main components of a space helix TWT (traveling wave tube) are electron gun, helix slow-wave system and collector. Thermal issue is of great importance for space helix TWTs. High heat efficiency of cathode is required for electron gun, as well as high heat transmission capacity for slow-wave system and collector. Some structure optimization for the electron gun, slow-wave system and the collector of some type of space helix TWT has been proposed aiming the above purpose. To evaluate the structural optimization means, the related thermal analysis has been carried out using ANSYS software. The simulation results demonstrate that the structure optimization is effective. And the actual effect needs to be further studied.
Research on the Propagation Process of One-Dimensional Stress Wave inside the Projectile
Authors: Li Jun , Ning Quan Li , Liu Chuang
Published: October 2011

Taking aim at the phenomenon that the propagation process of one-dimensional stress wave in projectile will be exposed to reflection and transmission on the interface between mediums, based on wave impedance and limit yield of the different mediums inside some type projectile, using calculation and graphic method, analyses one-dimensional stress wave propagation in different mediums, educe ultimate loading action on projectile-loaded equipment.
Research on the Engagement Effect of Wedge Tooth
Authors: Jian Xiao Gang , Jia Hong Sheng , Bian Yong Ming , Shi Lai De
Published: October 2011

In this paper, we analyze the working mechanism of the wedge-type anchorage in the hydraulic synchronizing lifting device and tradition one, discuss the engagement effect between the wedge and the steel strand, establish a mathematical model to analyze the wedge tooth strength and evaluate carrying contaminant capacity qualitatively. The results of the study indicate that: the hardness difference between the wedge and the steel strand, the tooth shape and relevant parameters, the inside tooth surface geometric structure, are key factors to improve the performance of the wedge-type anchorage, which provides the basis to the wedge tooth optimization design and its working life prediction.
The Simulation and Analysis of Heat Transfer Process of Honeycomb Regenerator
Authors: Tian Ye , Liu Xun Liang , Wen Zhi , Feng Xiao Hong , Li Zhi , Yong Hai Quan
Published: October 2011

On the basis of established mathematic model of regenerator heat transfer process, the process of heat transfer of ceramic honeycomb regenerator with the method of simulation is studied. The temperature distribution curve of regenerator and gas is obtained, the temperatures curve of regenerator and gas are closely related to time is investigated ,and the influence of operation and structure parameter to heat transfer of regenerator is discussed. All this work is to provide guides of rational design of single-ended regenerative burner.
Study on the Fuzzy Assessment of Indirect Application Effect of ERP System
Authors: Lu Yan Fei , Lu Mang , Peng Fang
Published: October 2011

This article adopts a fuzzy and comprehensive assessment to analyze the indirect application effect of ERP system in JXCM through indirect application effect assessment index of ERP system from ERP system's implementation in national enterprises, draws a conclusion for assessment and makes further suggestions.
Dynamic Model of Thermoelectric Cooler and Temperature Control Based on Adaptive Fuzzy-PID
Authors: Song Shao Jing , Wang Jian Jun
Published: October 2011

Thermoelectric cooler has dynamic thermoelectric performance under complex environment. A linear dynamic model of the thermoelectric cooler is derived using small-signal linearization method. It shows that the dynamic model of the thermoelectric cooler has one zero and two poles. The dynamic model of the thermoelectric cooler is showed to vary with operating conditions. Based of average linear dynamic model of a thermoelectric cooler, a temperature control system is designed for the cold end temperature of the thermoelectric cooler using fuzzy-PID algorithm. The step response tests show that the controller has satisfying dynamic and static performance. In room temperature environment, the response time for cooling down 18°C is around 340s and the steady error is very small. The cold-end temperature can be maintained at the setting value within 0.1°C. Experiment results also show that the setting temperature can reach to 23°C below the environment temperature, and the setting value is smaller and the step response time is longer.
The Research of Driving Force Distribution under Identical-State-Control while 4WID-EV Driving Straight
Authors: Zhao Ming Hui , Wang Lian Dong , Liu Chao , Chen Rong Xin , Yang Shuai
Published: October 2011

The strategy of 4-wheel-identical-state-control is proposed on the designed 4-wheel-independent-driven electric vehicle (briefed as 4WID-EV), the working states of each wheel are adjusted to be the same through controlling the ratio of drive-force and vertical-load on them as equal as possible, the co-simulation of ADAMS and Matlab/Simulink is done about the 4WID-EV driving on the straight flat road and slopes. The real vehicle test is performed. The result indicates that the strategy of identical-state-control can control each wheel slip ratio to be equal, make each wheel working in phase, reduce the power loss, improve the vehicle power property, and achieve the aim of good driving force distribution.
Compact CPW-Fed Multiple Broadband Planar Monopole Antenna
Authors: Chuang Ching Song , Chang Yong Jyun
Published: October 2011

This paper presents a kind of CPW-fed Pentagon-type multi-band planar monopole antenna. It provides an integrated wideband operating frequency band coverage from 900MHz of GSM to 10.6GHz UWB applications. This is the desirable antenna characteristic that is suitable for modern integrated mobile broadband wireless radio access applications. The proposed antenna was fabricated in practice with the FR4 print circuit board having 1.6 mm substrate thickness and dielectric constant of 4.4, tangent loss constant of 0.02. The measurement results show the success of the proposed planar monopole antenna. The detailed antenna design parameters are given in this paper. The characteristics of this type antenna, wide in bandwidth, low in profile, light in weight and small in size and single layer fabrication can be beneficial in the future integration with other microwave circuit of wireless systems.
An Improved Interrupted Sampling Repeater Jamming to SAR
Authors: Hu Hua Chao , Jia Xin , Wu Jin Liang , Zhang Gui Ping , Gao Yang
Published: October 2011

A new kind of Synthetic Aperture Radar (SAR) jamming method is proposed: the 2-D interrupted-sampling repeater jamming. The fundamentals and implement of this jamming method are investigated. This jamming method can realize two-dimensional jamming in range and azimuth, and cause the SAR image ambiguous, and achieves the effect of multi-false targets. The research shows: both the suppression and deceptive jamming effect exist. Its validities are proved by the simulation.
Microarray Data Classification Based on Evolutionary Multiple Classifier System
Authors: Gu Zheng Gang , Liu Kun Hong
Published: October 2011

Designing an evolutionary multiple classifier system (MCS) is a relatively new research area. In this paper, we propose a genetic algorithm (GA) based MCS for microarray data classification. We construct a feature poll with different feature selection methods first, and then a multi-objective GA is applied to implement ensemble feature selection process so as to generate a set of classifiers. When this GA stops, a set of base classifiers are generated. Here we use all the nondominated individuals in last generation to build an ensemble system and test the proposed ensemble method and the method that apply a classifier selection process to select proper classifiers from all the individuals in last generation. The experimental results show the proposed ensemble method is roubust and can lead to promising results.
The Automatism Capture the Account Parameter in Engineering Figure Using Computer
Authors: Li Qiang , Li Jian Zhong
Published: October 2011

This text advance the method of automatism capture the engineering parameter in figure using computer, thread conversion and account the coordinate, capture the engineering parameter in figure, can frank capture the engineering parameter in curve from figure, especially for experience figure, capture the engineering parameter is achieve nicety and effective.
RFIDTango: A Scenario-Based Massive RFID Data Generator
Authors: Xie Fang Quan , Li Zhan Huai , Chen Qun , Nie Yan Ming , Peng Shang Lian
Published: October 2011

RFID (Radio Frequency IDentification) technology has been widely used in many applications. In recent years, researchers have begun to study various RFID data management problems. Unfortunately, it is difficult for researchers to obtain massive raw RFID data because of hardware cost and limitations of lab environment. We have designed RFIDTango, a massive raw RFID data generator, to simulate real RFID application scenarios. In this paper, we present a system of RFIDTango and show how RFIDTango can simulate a RFID-enabled supermarket scenario effectively and efficiently.
Research on Small Signal Stability of SVG DC Voltage close Loop Control
Authors: Zha Cong Mei , Zhu Yong Sheng , Xu Qi Ying
Published: October 2011

This paper makes analyses on the basic regulation characteristics of Static Var Generator (SVG). From the perspective of AC and DC’s instantaneous power balance, the approximate equivalent model of small signal perturbations method is established for analysing the system stability. The stability and dynamic characteristics research is performed accordingly, which provide a basis for parameters design of SVG.
Design of Stabilized Platform Controller for Mobile Satellite Communication System
Authors: Yuan Tao , Wang Yu
Published: October 2011

The stabilized platform servo system ensures the carrier communicating with satellites stably while in motion. The key to this system is to isolate disturbance coursed by the moving of the carrier and maintain the stability of antenna directivity. This paper has compared PID algorithm and I-PD algorithm, and designed a control scheme for the stabilized platform using the combination of speed-change integral I-PD algorithm and feed-forward control. The results of the simulation and actual testing indicate that the design this paper presents has a strong suppression to disturbance and meets the precision requirements of the mobile satellite communication system.
Depleting Mode Control Strategies for Plug-in Hybrid Electric Vehicles
Authors: Zhang Bing Zhan , Zhao Han , Yin An Dong
Published: October 2011

Control strategy is the most important issue in the Plug-in Hybrid electric vehicles (PHEV) design, which has two modes: charge depleting mode (CD) and charge sustaining mode (CS). The different control strategies in depleting mode will have a great influence on PHEV dynamic performance and fuel economy. The engine optimal torque control strategy was proposed in the paper. The vehicle simulation model in Powertrain Systems Analysis Toolkit (PSAT) was adopted to evaluate the proposed control strategy. The aggressive highway drive cycle Artemis_hwy and a random drive cycle generated by Markov Process were used. The simulation results indicate the proposed control strategy has great improvement in fuel economy.
Design and Development of the Stiffness Test System for Car Body Based on Multifunction Data Acquisition Device
Authors: Su Shi Jie , Zhang Jian , Wang Ling Ling , Wu Chun Yan
Published: October 2011

Based on the computer and multifunction data acquisition device, the stiffness test system for car body was developed by using Microsoft Visual Studio.Net 2008, which could manage the test process, test the stiffness automatically according to the test process, manage the template of test report, generate the test report automatically and etc. The high precision displacement transducer and the high accuracy multifunction data acquisition device were used to realize precise test of car body. In order to improve system reliability and test accuracy, the method including opt electric isolating, software and hardware filtering has been used. By practical application, it is proved that this system has some advantages such as high test precision, high test efficiency, and convenient operation.
A Wavelength Interleaved DWDM ROF System with 60GHz Optical OFDM Signal
Authors: Ma Yong Hong , Zhang Chong Xiang , Zhang Pan
Published: October 2011

we demonstrate a wavelength interleaved DWDM Radio-over-Fiber (ROF) system for providing 1-Gb/s OFDM signal in downlink and 1-Gb/s OOK data in uplink simultaneously. In this scheme, we use only one arrayed waveguide grating device at the remote node to realize both the de-multiplexing and multiplexing functions. The experimental results demonstrate that this scheme is feasible to the future broadband high-speed OFDM-ROF access system.
The Algorithm of Points Set Extracting from 2D Voronoi Diagram Based on Crystal Growth
Authors: Wu Xiao Yong , Zhu Yi Fan , Jing Tao
Published: October 2011

The outputs of constructing voronoi diagram with crystal growth algorithm are pixel points set. A whole methodology of extraction of pixel points set is introduced and magnifier scanning algorithm (MSA) which is used to identifying voronoi vertexes and edges is explained in detail. Experiments show that the methodology and MSA is clear and accurate to weighted voronoi diagram.
Study on Mechanism of Electrochemical Micro-Machining of Titanium Alloys
Authors: Cao Guo Qiang , Dai Yi Tong , Yao Lan
Published: October 2011

Using electrochemical machining process in air difficult machining materials is already become the mainstream of aeronautical production techniques, and electrochemical micro-machining is the top priority, Through the study of each variable in the process of electrochemical micro-machining of titanium alloys, obtain the characteristics mechanism of electrochemical micro-machining of titanium alloys. Through the analysis of its mechanism, obtain the summarized trends and interrelationships of the various elements in electrochemical micro-machining of titanium alloys.
Optimization Design for the Large Gantry Machining Center Crossbeam
Authors: Huang Qing , Chen Wei Fang , Ye Wen Hua , Lou Pei Huang , Liu Shi Hao
Published: October 2011

The crossbeam is an important part in the gantry machining center which greatly affects the machining accuracy. Four kinds of crossbeam structure for the large machining center were designed and their static and dynamic characteristics were analyzed. The optimal crossbeam structure was selected by the comprehensive performance evaluation method. Then the thicknesses of rib plates in the crossbeam were defined as the optimization parameters after conducting the sensitivity analysis. The first four natural frequencies were defined as the objective functions and the static performance and the mass were defined as the constraint conditions. The optimal sizes of the rib plates in the crossbeam were obtained by the optimization analysis. Finally the feasibility of the result was demonstrated by the simulation. The result indicated that with the mass increased only by 0.18%, the first four natural frequencies of the optimal crossbeam were increased by 19.56%, 19.45%, 19.84%, 17.05%.
Simulating Research on Rod String’s Gyro Effect Caused by Eccentric Rotation in Circular Tube
Authors: Dong Shi Min , Zhang Wan Sheng , Chai Guo Hong , Xing Ming Ming , Zhang Hong
Published: October 2011

Based on the influences of eccentrical rotating inertial centrifugal force and axial force on the rod string’s lateral bending deformation, the finite beam element model of rod string’s bending deformation is established. The constraint to rod string’s bending deflection exerted by inwall of circular tube and the distinction of the constraint to rod string’s deflection because of the different gaps between rod string to circular tube and coupling to circular tube are both taken into account. Meanwhile, removable spring elements with two directions are adopted, by which the non-linear contact problem between the rod string and circular tube is well resolved. Combining space beam element and spring elements with two directions, the corresponding finite element simulating program is also developed. Several simulating results can be shown as follows: eccentric rotation of rod string is able to produce gyro effect in vertical circular tube; The shape of the rod string’s deformation is a spiral which is thin on the upper-part and dense on the under-part; Gyro wave numbers are affected obviously by rotating speed, eccentricity, axial concentrated force, axial distributed force and length of the rod string.
Luminescent Property of Al2O3:Ce3+ Thin Films
Authors: Yan Shao Feng , Miao Kai Ge
Published: October 2011

The Al2O3 films doped with Ce3 + were deposited on slides by the medium-frequency reaction magnetron sputtering process, to which the power is constant, Ar flow rate 70 sccm, O2 flow rate 25~45sccm and sputtering time 90min at room temperature. The relationship between the luminescent properties of Al2O3:Ce3 + films and the doped amount of Ce3 + in the films was studied. The presence of Ce3 + and stoichiometry of those films were determined. It was observed that the total luminescence intensity increases and the peak positions are strongly dependent on Ce3+ concentration in the films. The analysis of luminescent excitation spectra showed that the luminance is due to the Ce3+ concentration in the cerium chloride aggregate formed in the films.
Research on Mobile Robot SLAM in Dynamic Environment
Authors: Chen Bai Fan , Cai Zi Xing
Published: October 2011

A SLAMiDE（SLAM in Dynamic Environments) system is designed and realized in the paper, which supplies a holistic framework and a series of implementation methods for mobile robot SLAM in dynamic environments. A uniform target model is proposed in SLAMiDE system. The dynamic targets and static targets and the mobile robot pose are estimated simultaneously, by synthesized the research of the data association and dynamic targets detection and static SLAM based on local maps. Finally, the results of the experimental test prove that the SLAMiDE system can realize dynamic objects detection and mapping and location correctly.
Study on Objective Design for Innovative Product
Authors: Yin Cheng Long , Zhu Lin , Kong Fan Rang
Published: October 2011

In this paper, objective design phase for beginning end of product design process is studied and the procedures and steps of object design is described. Sources of finding design objects and methods, information collection and processing of design object are studied. Simultaneously, several criterions are designed to judge feasibility of design object, such as social environment criterion, economic cost criterion, technology criterion, time criterion, value criterion etc.. Computer aided screening and evaluation is realized during objective design. Finally, the template of expressing design object is given.
Research on Prediction of Microstructure Evolution during Mobile Steering Arm Forging Process by FEM
Authors: Chen Wen Lin , Peng Li Jing , Ma Yong , Wang Shao Yang , Li Zhi Jie , Tang Tao
Published: October 2011

In order to get high quality forgings, it is significant to predict the microstructure evolution during hot forging process accurately. In this study, a simulation model is built by combining FEM with the dynamic recrystallization model of 42CrMo, and the finite element model is proved to be reliable by a serial of upsetting deformation experiment. Then the distributions of microstructure evolution are obtained on upsetting process. Upsetting is beneficial to refine the grain size and drawing can make the distribution of grain size homogeneous. By comparing the simulation results with experiments, the distributions of microstructure are a close match in the middle part of steering arm. The forgings formed by this process have a good microstructure and have high comprehensive mechanical properties.
The Key Technology Research of Metal Bellows’ Virtual Design
Authors: Shi Yan Guo , Yao Bao Jun , Wang Li Fang , Zhang Qing Ling , Che Yan Liang
Published: October 2011

A parametric designing program which is used for the analysis of metal bellows’ stiffness, strength and fatigue life is developed basing on the software’s which contain Ansys, MSC.Marc, MSC.Fatigue and UGII in this paper. A designing and analyzing system with highly automation and standardization is established combined with VC++ and other programming languages compiling system interface,arranging the process automatically and generating the results automatically.
Neural-Fuzzy Variable Gap Control Method for GMAW Pipe-Line Welding with CCD Camera
Authors: Hu Hai Lin , Li Jing , Li Fang , Zhu Wei , Pang He Qiang
Published: October 2011

He sensing of the weld pool and controlling of torch at the center of the groove are important problems in back welding of GMAW (Gas Metal Arc Welding) for pipeline, furthermore, the gap of the groove perhaps is varied, which needs an intelligent control strategy to obtain the high welding quality. Fuzzy neural network control method based on BP algorithm is proposed in this paper, from the module of image processing, the corresponding gap location and width can be obtained. Then determine corresponding swing width and speed when weld gap is varied by the network fuzzy inference and calculating Euclidean distance for GMAW variable gap backing welding process. Experiment results show that the designed control method can improve the welding quality compared with traditional fixed swing and the traditional auto swing.
Preparation and Property Study of PMMA/ASA Alloy
Authors: Tang Guo Dong , Chen Si , Shi Yan Qin , Wang Xu
Published: October 2011

Polymethyl methacrylate (PMMA)/ acrylonitrile-styrene-acrylate terpolymer (ASA) alloy was prepared via melt blending method. Effects of ASA melt flow rate and PMMA/ASA ratio on mechanical property of the alloy were studied. It showed that when the high melt flow rate ASA was used, alloy’s tensile strength and flexural strength were little different from using low melt flow rate ASA, while the impact strength was significantly higher than the latter. Differential scanning calorimetry (DSC) analysis showed that a glass transition (Tg) platform emerged in low melt flow rate ASA at 48.5°C, which represented the Tg of the interface phase formed between SAN grafted acrylate rubber particles and SAN matrix. Scanning electron microscope (SEM) experiment further showed that when low melt flow rate ASA was used, alloy’s cross section was smooth which showed the characteristics of brittle fracture.
Performance Dynamic Tracking and Analysis System of Road Traffic Signs
Authors: Ma Jun , Su Wen Ying
Published: October 2011

In view of the heavy workload and possible intervention to the normal traffic flow during the performance testing of road traffic signs, this paper is designed to present a system that can be installed in an automobile and automatically track and analyze the performance of traffic signs. The system consists of a carrying vehicle, GPS, IMU, area-array cameras, frame grabbers, data acquisition software and data analysis software. Based on close-range photogrammetry technology, the system is designed with a set of effective road traffic signs automatic detection algorithms, which can automatically measure and analyze the properties of road traffic signs, such as dimensions, headroom and verticality of the column, etc.
The Design of Liquid Level Detection System for Oil Tank
Authors: Wu Ai Ping , Pan He Ping , Li Yong Hua
Published: October 2011

The basic principle of liquid level measurement with capacitive sensor is described. According to differences in dielectric constant between oil and water, a liquid level detection system for oil tank is designed. The system includes capacitive sensor, signal processing circuit, FPGA logic circuit and the software of computer. Results show that the system has characteristics of easy operation, high precision. It can detect the change of liquid level accurately and effectively.
Product Quality Control Based on Medium Logic
Authors: Huang Wei Dong , Liu Yin Mao , Wu Mei Rong
Published: October 2011

Focusing on representation of quality characteristics variation in product process control, a measurement method based on medium logic was established. Representation model of quality detection index variation in process control was put forward, and fuzziness measurement of quality detection index was improved. Tack monitoring and maintenance of production line were researched by analyzing the variation of product quality index with disturbance. Furthermore, computer simulation was carried out by which influence of controllable variables on product quality with disturbance was analyzed and by which the efficiency of model built above was supported.
Numerically Filtering Based on PLC and the Application in the Control System of the Intelligent Building
Authors: Liu He Jian
Published: October 2011

This article introduces the way Arithmetic Mean Filtering, Weighted Mean Filtering and Inertia Filtering are applied in dealing with analog signals in PLC control system. Apart from presenting the design of the corresponding numerical filtering procedure, it provides a concrete illustration by citing a case where numerical filtering is applied in Intelligent Building Control System. Facts show Application of numerical filtering effectively strengthens the liability of the system.
High Accuracy Analysis of SCARA Industrial Robot Based on Screw Theory
Authors: Zhao Liang , Su Meng , Miao Yun Chen
Published: October 2011

Error sources which influence the end-executor’s accuracy are summarized. Based on an analysis of influence caused by the structural error and transmission error, we build a pose error model of industrial robots with screw theory. If regarding the inertia force of the robot system as the external force, the robot system will become a static system. The rigidity can be analyzed using the screw theory, then we establish the dynamic error modle which is caused by the inertia force and gravity. After the error parameters which influence the static error of Selective Compliance Assembly Robot Arm (SCARA) robot are expressed by two-dimensional discrete variable, error space of the end-executor’s track of robot are made. Position error which influenced by the error sources are analysed by comparision of difference. Total accuracy can be improved through controlling the error direction of the static error to counteract the dynamic error's influence. The error model provides an effective theoretical support for the design of industrial robots with different accuracy requirements.
Heuristic Particle Swarm Optimization for Batching and Scheduling Flowshop with Sequence-Independent Setup Time
Authors: Tang Qi , Tang Li Xin
Published: October 2011

This paper considers Integration of batching and scheduling with features on batch scheduling such as multi-product facilities, multi-stage, set-up time depending on sequence, limited storage. For this complicated problem, we present a Conjunctive model and Heuristic Particle Swarm Optimization. We proposed Local Search (LS) Strategy to improve the HPSO. Computations show that both methods are efficient. In addition, HPSO are better than CM.
Optimization of FengTai Power Plant 350MW Supercritical Unit Water Supply RB Control Strategy
Authors: Guo Jin Tao , Xin Jiang
Published: October 2011

The improvement of RB is significant for safety of both the power plant and power grid. This paper, took the 2 × 350MW unit of Inner Mongolia Huaneng Power Plant for instance, researched on three ways to improve water supply RB, like taking a proper sliding pressure curve, improving the water supply system and optimizing the boiler combustion. In the research, we succeeded to maintain main parameters of the unit within a safety range during RB operation, and avoided a unit trip accident causing by one single pump’s fault trip. Therefore, the research’s success settled a good base for the unit’s safe and stable operation.
Design Optimization of Beam-Pumping Unit Based on Improved Particle Swarm Optimization
Authors: Li Yan Bin , Jiang Tong , Gao You Hua , Yu Lian Yong
Published: October 2011

A novel particle swarm optimization algorithm based on chaos searching has been proposed and introduced to optimize the design of beam pumping unit which takes the minimum peak torque factor on the up stroke as the objective function. The optimization for beam-pumping unit have shown the improved particle swarm optimization based on chaos searching algorithm has both advantage of simplify for implement of original particle swarm optimization and advantage of fast convergence, easy to escape local minima for chaos optimization algorithm. The improved optimization has also provided a new method for the design of complex structure.
The Structure and Reliability Analysis of Metro Building Automatic System
Authors: Li Jia Zhi , Wang Jia , Tan Zhi , Zhang Lei
Published: October 2011

This paper analyzes the structure of Building Automatic System and introduces software and hardware configuration and network configuration of the system. Then the authors list two kinds of reliability analysis methods and describe their features. Based on the characteristics and the control level of station BAS, finally, we achieve reliability analysis, which has scientificity, rationality and practicability, and can be helpful for guiding the maintenance, design, and further perfect of BAS system.
The Research on Key Technology of Digital Probe Instrument
Authors: Zhu Qian Ying , Wang Bao Guang
Published: October 2011

The digital probe instrument is used for measure the microwave impedance of electronic circuit, which request both the precision and resolution of 3d displacement of the probe at the level of 1~2μm.As there are a lot of the points to be measured, it is a high labor intensity and low efficient work when person moving and positioning the right position through high magnification microscopy only by eyes, as well as some points that should be measured are easily ignored. A double-3d displacement sliding table consists of grating digital system is proposed in the paper, which could solve the problems successfully.
An Improved Multi-Parameters Perturbation Privacy Preserving Association Rules Mining Algorithm
Authors: Liu Jie , Li Tian Qi , Zhang Jian Pei
Published: October 2011

Multi-parameters data perturbation method is a kind of original data perturbation methods for privacy preserving association rules mining. However, the time-efficiency of restoring the frequent itemsets in multi-parameters perturbation algorithm is still not high.One method is proposed in this paper to improve the time efficiency of multi-parameters randomized perturbation algorithm according to the characteristics of the model to restore frequent itemsets. The method improves the time efficiency by getting the elements of the first line of the inversed matrix of transformation matrix. Finally, both theoretical analysis and experimental results show that the improved algorithm is more time-efficient and space-efficient than the original algorithm.
Development of a Portable ZigBee-Based Nuclear Radiation Monitoring and Detection System
Authors: Ding Fei , Tong En , Song Ai Guo , Li Jian Qing , Song Guang Ming
Published: October 2011

This paper presents the development of a novel nuclear radiation monitoring and detection system. With the lightweight and global positioning features, the implemented wireless nuclear detection node can easily be deployed to discover unusual or abnormal radioactivity and map the events. ZigBee-based multi-hop mesh communication is adopted between nuclear detection nodes. All wireless nuclear detection nodes are designed with two working modes, continuous operation and timing operation. The two modes can be switched at any specified time to save energy consumption. Meanwhile, the features of anti-jamming against 802.11 network of ZigBee technology are tested and evaluated.
Adaptive Iterative Learning Control for Robot Manipulators with Initial Resetting Errors
Authors: Wei Jian Ming , Hu Yun An
Published: October 2011

In this paper, an adaptive iterative learning control is presented for robot manipulators with unknown parameters, performing repetitive tasks. In order to overcome the initial resetting errors, an auxiliary tracking error function is introduced. The adaptive algorithm is derived along the iteration axis to search for suitable parameter values. The technical analysis shows convergence of the tracking errors. Finally, simulation results are provided to illustrate the effectiveness of the proposed controller.
Multi-Provenance Depositional Model of the early Cretaceous in the South Slope Area of Baiyinchagan Depression, Erlian Basin
Authors: Zhang Li Qiang
Published: October 2011

Based on the studying on the palaeogeomorphic, the source provenance and it’s direction of the early Cretaceous Tenggeer formation in the south Slope area of Baiyinchagan depression of Erlian basin were studied in detail by many methods such as the analysis of rocks and minerals, rock fragment character ,seismic profile analysis, electric logging description, mud logging analysis, etc., for studying the distribution of the depositional system of this area. The research shows that there is mainly controlled by three direction sediment source regions in Xilin area of the south slope area of the Baiyinchagan Depression, which are from west southwest, south, and southeast. Provenance have favorable spatial combination with depositional system and determine the depositional system pattern of the Tenggeer formation.
Study Friction between Wheel and Rail by Using Molecular Dynamics Method
Authors: Xiao Qian , Mu Ming , Zhou Xin Jian , Che Yu Xiang
Published: October 2011

Aiming at researching friction process on the influence of train rolling contact properties between the wheel and rail,using the basic principle of Molecular Dynamics Simulation and Embedded Atomic Method theory,study the areas of adhesion within the contact patch area will gradually increase along with the occurrence of the friction process,research the increase process about the areas of adhesion within the contact patch area by means of Molecular Dynamics simulation model and simulation algorithm.For the study of friction on the surface about changes and micro-dynamic behavior,understanding the influence of the friction process on the train rolling contact characteristics,provides a numerical simulation based on microscopic approaches and methods.The results show that the method is easy to achieve a large time scale,a large number of atoms of the dynamic simulation.
Indentation and Friction of Cu44Zr43Al10Nb3 Bulk Metallic Glasses on Nano-Scale
Authors: Sun Bao Ru , Zhan Zai Ji
Published: October 2011

Indentation and sliding friction of the as-cast, the relaxed and the crystallized Cu44Zr43Al10Nb3 bulk metallic glass (BMG) are investigated on nanoscale by nanoindentation. The depth, the width and the morphology of the scratches formed by the tip of the nanoindentor are different, which reflect the differences in structure, not only between the glassy and the crystallized states but also between the two glassy states, the as-cast and the relaxed. The coefficient of sliding friction of Cu44Zr43Al10Nb3 BMG is increased with increasing the load, and it is maximal for annealed at 683K. Improved plastic deformability is found for the relaxed one.
A Novel Method of High Frequency Weak Signal Detection Based on Chaotic Oscillator System and Wavelet Transform System
Authors: Shi Shuo , Li Jin Yan , Gu Xue Mai
Published: October 2011

Based on chaotic oscillator system and wavelet transform system, this paper proposes a novel method on high frequency weak signal detection. Chaotic system is a typical non-linear system which is sensitive to certain signals and immune to noise at the same time. Its properties demonstrate the potential application on weak signal detection. Due to the good localization in both time domain and frequency domain, the wavelet transform method can automatically adjust to different frequency components and increase the Signal-to-Noise Ratio. Starting from the analysis of advantages and disadvantages of two signal detection methods, we put forward a combined method that takes advantage of each method to detect weak signals with high frequency. The simulation results show that the novel method can detect weak signals with frequency in an order of magnitude of 107Hz, and the input Signal-to-Noise Ratio threshold could be-42.5dB.
Use of Taguchi Method to Optimize the Operating Parameters of a High-Pressure Injector Driving Circuit
Authors: Tsai Wen Chang , Wu Zong Hua
Published: October 2011

This paper develops a superior injector driving circuit for a 500c.c. motorcycle GDI engine. The POWER MOSFET component is introduced in the design of the three-pulse injector driving circuit. Experiments for the designed electric driving circuit are investigated to verify its feasibility. The experiments of the H.P. injector driving circuit are conducted for the fuel injection quantity of the H.P. injector under 80~100 bar fuel pressure, 1200~2000 μs injection pulse duration and DC 55~65V power supply voltage. PWM control is introduced to the last pulse 3A holding current for fast cut-off response time of the H.P. injector. Next, Taguchi method was used to lead the design of experiments (DOE). The fuel injection quantities were measured in the various control parameters as engine speeds, power supply voltages, injector driving currents, and fuel supply pressures by the designed injector driving circuit. Effect of these control parameters of the high-pressure (H.P.) injector driving circuit on the fuel injection quantity are analyzed in the paper. Taguchi orthogonal array optimizes the operating parameters of the H.P. fuel injecting system. Results show that the three-pulse POWER MOSFET injector driving circuit is capable of operating stably and assure the accurate injection quantity of the H.P. injector.
Analysis the Reason of Head and Tail Pully Driving and Bidirectional Motor Negative Phase Sequence over Current Protection Malfunction
Authors: Yang Rong Chun , Edwards Lloyd , Gao Feng Hua
Published: October 2011

Analysis the wiring of head and tail pully driving & bidirectional 6KV motor，and found the reason of negative phase sequence over current protection malfunction did occur when the motor ran in the reverse direction , then compared the solution methods to make sure which one is better. At last use the method that change the sampling program to make the motor negative phase sequence over current protection wil in effect.
Research on the Application of IBE in IEC61850 Substation Automation System
Authors: Yin Shao Ping
Published: October 2011

In order to reap the benefits promised by the Smart Grid, communications between the IEDs in IEC 61850 Substation Automation System (SAS) will need to be made much more secure.Traditional security solutions based on Public Key Infrastructure (PKI) are calculation intensive and introduces latency that will be difficult to meet substation environmental and electrical requirements, so they are not well suited for IEC 61850 SAS. Identity based encryption (IBE) schemes, introduced by Shamir in 1984 [5] are based on the idea to use participant’s unique identities as public key and public key directories are unnecessary. Thus, utilizing IBE in IEC 61850 SAS is a reasonable choice. This paper briefly introduces the features of IEC 61850 SAS communication security and IBE and then propose an IBE-based Self Private Key Generated (SPKG) encryption scheme to establish encryption system in IEC 61850 SAS. Advantages of this SPKG Scheme are also discussed in the paper.
The Research of Commonly Used Technologies and Application Fields on Data Mining
Authors: Meng Jian Liang , Yang Yan Yan , Niu Wei Hua
Published: October 2011

Data mining is a computer analysis technology to birth not long but with rapid development, in these years, data mining theories have matured increasingly, and have shined in practice. This paper introduces briefly the concept of data mining, discusses commonly used data mining technologies, then the applications of data mining are introduced in detail, and expresses good perspective to future of data mining finally.
Comparison of Performance between Concentrated and Rhombic Windings for a Slotless Brushless DC Motor
Authors: Hwang Chang Chou , Li Ping Lun
Published: October 2011

This paper presents and compares the performance of a two-pole, three-phase slotless brushless DC motor with two types of winding configuration: concentrated and rhombic windings. Application of the finite element method (FEM) analysis to their performance calculations is performed.
Experimental Study on Flaw Response in Inhomogeneous Media
Authors: Zheng Gang Feng , Wu Bin , He Cun Fu
Published: October 2011

The objective of this paper is to predict the flaw response in an inhomogeneous solid medium. Multi-Gaussian Beam (MGB) model is used to represent the incident ultrasonic beam. The effect of ultrasonic attenuation and phase velocity dispersion due to grain scattering is included in the predictions. The effect of variation of mean diameter of the grains on the received voltage for different domain of interest is studied through the experimental results.
Research on Tri-Frequency Phase Ranging Method
Authors: Yuan Qi Ping , Fan Li Jie , Tong Zheng Rong
Published: October 2011

Based on the principle of microwaves transmission, a novel method of tri-frequency ranging measurement is proposed. When the wavelength of the transmission signal is between 0.47m and 0.57m, the transmitter generates three signals that are co-prime in the wavelength and the interval of the neighboring wavelength is less than or equal to 0.01m. Tri-frequency method can achieve 50m-1000m unambiguous ranging detection. The maximum precision of measurement can reach 10-6. The result is simulated by a program written in C language. In this way, the purpose of high-precision and long-distance measurement is realized.
Numerical Method with the Third-Order ENO Reconstruction Satisfying Two Conversation Laws for Linear Advection Equation
Authors: Chen Rong San , Liu An Ping
Published: October 2011

In recent years, Mao and his co-workers developed a class of finite-volume schemes for evolution partial differential equations, see [1-5].The schemes show a super-convergence quality and have good structure-preserving property in long-time numerical simulations. In [6], Chen and Ma developed a scheme which combine the idea of paper [5] and that of the the second-order ENO scheme [7]. In this paper, we propose a scheme which extend the result of [6] and obtain the scheme using the third-order ENO reconstruction. Numerical experiments show that our scheme is robust in long-time behaviors. Numerical solutions are far better than those of [6].
Research on Nearly Orthogonal Two-Dimensional Grid Generation
Authors: Su B.L. , Wei W.L.
Published: October 2011

A method for nearly orthogonal grid generation is presented in this study. The generating system is based on solution of a system of partial differential equations with finite difference discretization. The influence of the number of grid points, type of boundary, and intensity of the grid quality control function and grid properties are investigated. Specification of both boundary point distribution on all sides and moving boundaries is used. The proposed method is applied to various test problems£¬which shows this method provides a good balance between controlling grid orthogonality and cell aspect ratio.