bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Cooling Fan Speed Control Scheme of the Large Power Vehicular Diesel Engine in Altitude Environment
Authors: He Xing , Wang Xian Cheng , Hu Jun Biao , Sun Zhi Xin
Published: January 2014

The cooling water of the large power vehicular diesel engine often got high or low and engine could not work in the adaptive thermal conditions in altitude environment. In order to solve the problem, analyzed the refrigeration requirement of the diesel engine on plateau section, suggested the amelioration program from installing the fluid operated pump-mot fan speed regulating device. Base on the coupling simulation model of the diesel engine working process and coolant system, took the 90°C water temperature of the diesel engine as the optimally target value, analyzed the change canon of cooling fan speed form the ambient conditions and the diesel engine work condition, established the cooling fan rotary speed control MAP on plateau section, and regulated the cooling fan speed by the methods of open loop preset controlling and closed loop feedback controlling. That would provide the improved method for the large power vehicular diesel engine working well on plateau section.
Design of Soft-Switched Inverter
Authors: Wang Lu , Zhang Zhen Zhong , Liu Fang , Ding Guo Bao
Published: January 2014

In order to decrease the exhaust of the switch of inverter bridge arm, the auxiliary resonant net was imbed in the circuit structure which lead to cost ascension and credibility descend. This text discusses to design a DC/AC converter based on simplex single voltage source high frequency chain inversion technology, the output is 0.9KW/115V/400Hz.The pulse direct current voltage has been created by forward circuit and absorption branch which is controlled by voltage feedback in the input terminal of inverter bridge arm. The soft-switch of inverter bridge arm using DPM has been realized by controlling open or close of switch electric circuit on the invert bridge arm at pulse voltage for zero stages. It is not adding topology complicated degree of main circuit which could assure the reliability of the inverter.
Research on Static Stiffness Test System for BIW
Authors: Liu Wei , Wang Ling Long , Wang Chun Hui
Published: January 2014

Body static stiffness is an important index to evaluate the vehicle performance, and test is a main evaluation method for the static stiffness. Accordance with the existed problem of static stiffness measurement, we developed a bending and torsion stiffness measurement system. The system includes loading device, test bench, displacement sensor and fixture, data-acquisition system and software. The software communicates with slave computer (PLC) through serial interface to make data process and store. It also could do stiffness analysis according to relative methods. Practical application shows that the system could measure the static stiffness accurately.
Design of Electromagnetism Compatibility for Automatic Loading System
Authors: Ding Guo Bao , Yao Fushan , Ren Guangxu , Yu Jie
Published: January 2014

Based on the theory of electromagnetic compatibility, in view of the automatic loading control system, and carries on the EMC design, analyzed the sensitive circuit part of the principle and method of EMC design, mainly includes the power supply part, CPU control chip, the digital interface circuit and D/A conversion circuit protective measures.
Research on the Influence of Load Disturbance on the Crystallizer PID Control System
Authors: Gao Jun Xia
Published: January 2014

Based on the simulation model of hydraulic servo non-sinusoidal vibration control system by MATLAB/Simulink,the paper analyzed the degree of the best performance under different types of load disturbance on the crystallizer PID control System, and discussed the influence the amplitude and frequency of load disturbance on the control system. It has certain theoretical guiding significance for practical production.
The Design and Research of Active Clamp Forward Converter Based on IR1150
Authors: Fang Yu , Tan Li
Published: January 2014

Nowadays, the development of Power Electronics is very quickly. High frequency switching power supply has been widely used in many fields because of its advantages, such as high efficiency, low volume and low cost etc. this paper focuses on the research of DC-DC transform technology in switching power supply. In the foundation of the traditional forward converter, an active clamp forward converter based on one-cycle control is designed. The control IC is IR1150 based on one cycle control technique. The results show that the converter can effectively eliminate the interference of power ripple and switch error. The control method is simple and reliable. The peripheral circuit is easy to realize.
Disturbed Chaotic Systems Synchronization via Robust Mixed Functional Projective Method
Authors: Fan Tao , Fang Ning , Tan Fei
Published: January 2014

Robust mixed functional projective synchronization (RMFPS), which is the generalized synchronization idea developed very recently, is investigated in this paper. Based on Lyapunov stability theory and linear matrix inequality (LMI), some novel stability criterions for the synchronization between drive and response chaotic systems with disturbances are derived, and then a simple linear state feedback synchronization controller is designed. In order to test the proposed method, numerical simulations of hyper-chaotic unified systems with disturbances are then provided to show the effectiveness and feasibility of this chaos control and synchronization schemes.
Defect Detection of the Segmental Spherical Shell Based on Ultrasonic Transducer Array
Authors: Li Xi Peng , Xu Chun Guang , Wang Li Jiu , Dai Wei
Published: January 2014

It is of great significance to monitor and quantify the defects in the thin segmental spherical shell components. In the paper the guided wave’s inspiring method has been obtained from the wave-mode conversion based on the theory of the guided wave propagating in the thin spherical shell. Using the wavelet to process the testing signal, and the ellipse localization imaging algorithm, the defect’s localization and orientation can be detected accurately. Experimental results show the defect’s direction and location can be detected effectively and clearly.
Dry-Mixed Mortar Control System Based on Fieldbus and PLC
Authors: Zhang Huan , Shang Shu Qi , Gong Li Nong , Huang Chuan Hui
Published: January 2014

A design of dry-mixed mortar control system based on Fieldbus and PLC was introduced in this paper. A scheme of totally integrated automation, which includes S7-300 PLC, PROFIBUS-DP Fieldbus, touch panel and etc., was proposed. Firstly, control demands and process of this system were described; secondly, hardware configuration and software design were illustrated as well. By using large-scale PLC and field level network - PROFUBUS-DP, the motions of electric motor actuators or hydraulic cylinder actuators are running well, and all sections in the process flow, like hoist, well-distributed vibration, mixing, unloading, etc can all be implemented in time and in place. Though the actual running of the control system it has been proved that the fully integrated automation production of dry-mixed mortar can be thoroughly realized.
Intelligent Identification and Locating System of Steel Coil Based on Laser Technology
Authors: Wang Yu Chi , Zhou Si Yue , Yuan Zheng Peng
Published: January 2014

In this paper, a solution based on laser technology is proposed for steel coil handling.
The main emphasis is placed on the problem of steel coil identification and locating. In this paper, we first use laser data to construct three dimensional model of the worksite. And then we slice up the 3D model repeatedly to get the section images and make them to fusion. In order to wipe off the disturb of line, a line detection method based on probabilistic hough transform is proposed. Finally an improved least square method used in circle fitting is discussed.
Design and Implementation of the Airborne Laser Effector for Autonomous Pipeline Alignment
Authors: Liu Hai Fang , Wang Rui , Zhong Shi Sheng
Published: January 2014

Abstract. High-accuracy beam pointing is one of the key problems in the airborne laser remote sensing of natural gas pipeline leak. In response to the domestic demand for the long-distance natural pipeline leak detection, this study proposes an airborne laser effector for autonomous pipeline alignment based on CH4/H2S detector. Mainly structured on 2DOF serial mechanism, the device under discussion is designed with a control system operated on IPC and PMAC, followed by the design of hierarchical modular software. Once completed, the device is placed for indoors pointing experiments as well as simulated airborne test. The results show the effector can conduct full-angle scan of the pod area, achieve a static measuring precision of less than 0.4m as an alignment point is about 100 meters from the laser and detect leakage in dynamic simulated experiment, which meets with the design requirements. In other words, both the design and control algorithm are proved to be feasible. The effector holds an important engineering value for solving the problem of remote detection of the natural gas pipeline leakage.
The Application and Improve of Fuzzy Clustering in Classifying Control Targets
Authors: Liu Chang , Li Jie , Zhao Ji , Zhang Zhi Dong
Published: January 2014

In this paper, a new clustering method is designed to solve the problem that control object model of a small aerial vehicle (SAV) will be changing accompany the changing magnetic field. The method is based on the establishment of fuzzy clustering approach. In this method, the variation of object model is used to establish the membership function to reflect the changing speed of the targets, and use experimental data to determine the parameters of the function which can ensure the authenticity of the membership function; using the robustness of the control system as the criteria for determining the cut-off matrix in order to ensure the reliability of the classification results. According to the test, the method can be classify the objects, according to prior experiment data, simulation data and the criteria of classification.
Simulation Analysis of Synchronization Control for Ultrahigh Pressure Sterilization Equipment Based on AMESim
Authors: Fang Gui Hua , Li Xiao Yan
Published: January 2014

This paper introduces the working principle of the ultrahigh pressure sterilization equipment, the hydraulic system of hydraulic cylinder promoting the plug moving is analyzed by simulation, and then the hydraulic system added synchronous motor is analyzed by simulation, which found that the latter hydraulic system has higher synchrony measure , and it can improve the working performance of the original equipment, and it has certain reference significance to the improvement of the hydraulic system of the equipment.
Far-Field Energy Density of the Laser Detection System
Authors: Liu Quan , Zhang Guang Yu
Published: January 2014

This paper studies multi-sensor laser energy density measurement systems. The system uses a diffuse target surface placed in a plurality of optical probes, for each of the energy value of a particular feature. Meanwhile, the use of the energy density of the external synchronizing the camera imaging the target surface, and finally through a spot on the target surface characteristic measuring the energy value of the integration of the imaging information and the target plate, to give the far field distribution of the laser energy density received.
Small Module Involute Gear Precise Modeling and NC Machining
Authors: Sun Hong
Published: January 2014

We can take the approach of mathematical model by establishing accurate mathematical model of small module gear, and will get the data point approximation file to import into UG, and we can realize the precise three-dimensional modelling of small module gear through UG calling data points. We can take the close data as CNC wire-cutting processing node coordinates of programming, and program CNC wire-cutting processing. This can be a very good solution to the small module gear precise modeling and numerical control processing problem.
Research on Airline Operational Control Model Based on Analytic Hierarchy Process
Authors: Li Li Sha
Published: January 2014

With expansion of airlines fleet capacity in China, airlines pay more attention to airline profit, service evaluation, etc., besides flight safety. Therefore it is important to study on operational control approaches that can promote operational efficiency, guarantee flight on-schedule rate and reduce operational cost. In this paper, an Analytic Hierarchy Process is employed to build a related-factor model mainly influencing dispatchers making decision in the operational control process of airlines. This process makes the complicated decision-making system hierarchic and analyzes the importance of all related factors by comprising their importance in a hierarchical way. Through an algorithmic example and data analysis, the operational control decision-making model of an assisting nature based on hierarchic analysis in this paper can provide quantitative basis for final decision making.
Introduction to Intelligent Transportation Vehicle Detector
Authors: Chi Yao Dan , Yuan Di , Yang Xiao Tian
Published: January 2014

Increasingly grim situation in recent years due to traffic, the new traffic conditions to the vehicle detector development and application of proposed new requirements, this paper introduces a new form of intelligent transportation vehicle detectors at the request of Vehicle Detector Research be brief, a brief analysis of a variety of vehicle detector works that feature discusses the trend of vehicle detector’s development
Monitoring and Control System of Underground Coal Gasification Based on Industrial Ethernet and PLC
Authors: Li Guan , Li Wen Jun , Su Qian Qian , Sun Chun Feng , Ge Zeng Ye
Published: January 2014

Based on Industrial Ethernet, PLC and Industrial Computer, Monitoring and Control System of Underground Coal Gasification (UCG) were developed. Distributed measured sensor signals and complex monitoring tasks are realized by a PLC and an Industrial Computer. Star topology network is used. The connection between Monitoring system and PLC is realized by an industrial Ethernet module. The solution in laboratory condition appears reliability and quick data exchange was realized between PLC and Monitoring system.
Inter-Stator Synchronous Combined Method Based on SVM-DTC for Primary Winding Discontinuous PMLSM
Authors: Chen Lei , Zhu He , Sun Shu Guang , Li Yuan Yuan , Zhu Li Gui
Published: January 2014

The thesis puts forward an inter-stator synchronous combined control algorithm based on Space Vector Modulation Direct Thrust Control (SVM-DTC), which can overcome the difficulties of conventional SVM-DTC method applied in PWD-PMLSM. Because the electromagnetic parameters of the motor will change significantly when the shuttle pass through the junction of the two stators. Therefore, it must process the two stators flux linkage and thrust simultaneously. Theoretical analysis illustrates that this algorithm not only maintains high-transient response of DTC but also minimizes the inherent problems of thrust ripple in DTC. Ultimately, the simulation shows this method presents the favorable effects of the transient and steady state including excellent thrust stability in the process of shuttle transits between stators.
Design of Missile Longitudinal Control System Based on Backstepping Control
Authors: Li Mei Hong , Yin Jian , Sun Xue Yang , Xu Jin Xiang , Zhang Mei Mei
Published: January 2014

Missile control system is not block strict feedback system which is suitable to use backstepping method. So in this paper, a backstepping control method is proposed to design a missile longitudinal autopilot and is proved to be asymptotically stable by Lyapunov stability theory. The simulation results show that the designed system can still track commands quickly and accurately and is robust with aerodynamic perturbation and control input saturation.
A New Design of Laser Pulse Receiver in the Automatic Control System
Authors: Wang Ling , Mo Bo , Gao Ke
Published: January 2014

The existing problem of current laser pulse receiving system is that the laser pulses width is too narrow to be directly collected. And the consistency of the four signals acquisition is very strict. To deal with these problems, a new design of laser pulse receiver will be introduced in this article. This laser pulse receiving system includes the following structures: new high-speed laser pulse receiving hardware based on CPLD and Four-Quadrant Detectors, new peak-hold circuit of laser pulse, high-speed parallel ADC system, and processing data with fast interpolation algorithm in a Floating-Point DSP. Through the new design of high-speed parallel ADC system, the receiving system is able to simultaneously complete the timing of four high-speed laser pulse signals acquisition and the storing of data. The new construction of high-speed parallel acquisition is a core module in this design. And a new flow how to the DSP handle the data with fast interpolation algorithm will also be introduced in this article.
Simulation Analysis of Vector Control of Fuzzy-PID System Based on Mine Fanner Load
Authors: Wu Yan Xiang , Zhou Chao Qun , Zhang Chao Jun , Sun Pu
Published: January 2014

In this paper, through analysis on characteristics of the operation of the mine fanner, According to the requirement of low speed and smooth operation and quick response for AC speed regulating system of mine fanner, a new control system that based on vector control of Fuzzy-PID was designed. The simulation model was simulated and analysised by MATLAB/SIMULINK. The result indicated that the vector control of Fuzzy-PID system can not only quickly responded to the change of the load torque but also have good speed control performance, and has reliable engineering practical value.
Autonomous Control of Non-Silicon MEMS Flexible Micro-Assembly Line
Authors: Zhang Gao Yang , Jin Xin , Zhang Zhi Jing
Published: January 2014

A wide range of micro-components can today be produced using various micro-fabrication techniques. The efficient high volume assembly of complex micro-systems consisting of vast single components (i.e., hybrid micro-systems) is, however, a difficult task that is seen to be a real challenge for the robotic research community. It is necessary to conceive flexible, highly precise and fast micro-assembly methods. In this paper, a frame of a micro-assembly system in the form of flexible micro-assembly line and its autonomous control is presented. Implementation of the control system are described and the procedure of autonomous control is described as well.
High-Voltage Three-Phase Asynchronous Motor Soft-Starter via Hyristor for Water Cooling System of Steel Mill
Authors: Yang Yong , Yang Ming
Published: January 2014

This article introduces a high-voltage three-phase asynchronous motor soft-starter via thyristor that is suitable for water cooling system of steel mill. It improves motor start and stop characteristics, effectively eliminates water-hammer" effect caused by traditional direct start and stop, and is making more and more important positive impacts in the water cooling system of steel mill.
The Electromagnetic Control Air Pressure Brake Valve in the Research and Application of Vehicle Brake System
Authors: Sun Hong , Guan Zhi Xin
Published: January 2014

Air pressure brake and hydraulic brake is widely used in automotive as two kinds of brake system, and the air brake system is widely used in medium and large vehicles. But because of air pressure brake system with air as medium, this will appear in use easily leak etc and make the attenuation, unreliable phenomenon such as lost, which can cause the occurrence of traffic accidents. Study the kind of situations, an electromagnetic control pneumatic brake valve can be designed. Current is as a medium of braking signals through the strength of the current air output proportional control to control the brake, this technology can solve the problems which the wheel brake is out of sync, brake uncoordinated and small braking force.
An Improvement Geometric Error Identification Method of CNC Machine Tool Based on Double Ball Bar
Authors: Cheng Qiang , Qi Zhuo , Li Kai , Cai Li Gang , Lu Dong
Published: January 2014

The double ball bar is widely used because it can quickly, easily and cost-effectively detect and evaluate the accuracy of CNC machine tools. But since the error recognition algorithm based on the double ball bar ignores the quadratic item, its recognition accuracy would be reduced. In this paper, an improved CNC verticality error and position error identification formula, combined with the machine tool error model to deduce a new error recognition model of double ball bar measurement is proposed. It can be drawn that the accuracy of the model are better than the existing methods because it keeps the second item in the derivation process of the model.
Intelligent Remote Monitoring and Fault Diagnosis of Engineering Machinery System Design
Authors: Sun Hong
Published: January 2014

Remote monitoring and fault diagnosis system is an important part of intelligent construction machinery, on the basis of the original remote fault diagnosis system, we will explore and put forward a fleet of intelligent engineering machinery general structure model. Based on this, we will advance the overall design scheme of remote fault diagnosis expert system and solve the problems of engineering machinery remote fault analysis and diagnose the problem
The Design of Breeding Cotton Growth Management System Based on MMS
Authors: Li Guo Xin , Lu Jian Wei , Yin Feng Ling
Published: January 2014

In order to grasp the whole growth process of breeding cotton and establish the growth records of breeding cotton, the article proposes the design of breeding cotton growth management system based on MMS. The main idea is that field image acquisition terminals capture a live image in breeding cotton plots at a specific time every day, and send the live image to the monitoring center through the GPRS networks, then breeding cotton experts write cotton growth log and propose the next management advice for cotton based on the returned live image. At the same time, all the information will be written to the database in the monitoring center. The application of the system is able to not only save manpower costs, by tracking and analyzing the whole growth process of breeding cotton, but also summarize the successful breeding experience and failures. At the same time, the application of the system promotes cotton breeding and cotton management more scientific. After the actual testing, the system works stable and reliable, and meets the design requirements.
Degradation of a Phenolic β-O-4 Lignin Model Dimer by Electrochemically Mediated Delignification System with Violuric Acid
Authors: Tian Ge , Kong Fan Gong , Wang Shou Juan , Chen Jia Chuan
Published: January 2014

The β-O-4 type model compound guaiacylglycerol-β-guaiacyl ether was treated with a Violuric acid (VIO) mediated electrochemical delignification system. GC-MS analysis were used to investigate the changes of chemical structure of β-O-4 type model compound during reaction. Mechanism of this electrochemical delignification was also explored. Results indicated that the electrochemical oxidation by VIO as a mediator had strong oxidation capability on degradation of β-O-4 type model compound. After degradation, a series of aromatic compounds containing single benzene ring, furan compounds and aliphatic compounds with small molecule were produced. From their structures, the following reactions were caused by electrochemical oxidation: ether-bond cleavage, Cα-Cβ cleavage and benzene ring cleavage. Corrsequently, this work provides a comprehensive information on electrochemical oxidation delignification system that could be applied to industrial nonpollution bleaching.
Research on the Technology of RFID Sliding Sleeve
Authors: Shi Lei , Zhong Xing Jiu , Wu Jun , Li Bin
Published: January 2014

There is a very significant application today towards multiple zone fracturing operations in a horizontal well of low permeability reservior all over the world. But the number of the ball seat activated sliding sleeves that can be run in a well is limited because of the design and cant meet the need of volume fracturing in low permeability reservoir; Also the sleeves can only be shifted by CT, which extend the length of the operation and add to the overall costs. This paper introduces a kind of sleeve which is controlled by RFID and meet the need of volume fracturing, the number of sleeves that can be run in a well using this technology is essentially unlimited and can be operated remotely[1-3]. It is eay to operate and no intervention; It is proved by field test that this sleeve is reliable and can meet the field application.
Optimal Control of Time-Varying Systems with Multiple Delays for Servo Appplications
Authors: Li Zheng , Ding Steven X.
Published: January 2014

We study the problem of optimal control of linear time-varying systems for servo applications and develop a generalized minimum variance controller for a multi-input and multi-output controlled autoregressive moving average model with multiple delays. The controller is applicable to a large class of stochastic linear time-varying systems regardless variation speed in plant parameters.
Two Degree of Freedom Helmet Mounted Sight Testing System
Authors: He Jing Feng , Wang Ya Nan
Published: January 2014

In the light of the backwardness of test means, over-complication in operation and inaccessibly to the test of the system main performance parameters in the case of army equipping Helmet Mounted Sight (HMS), extensive researches are conducted on improvement and home manufacture of HMS in No.×× project, to solve the actual problem of maintenance in the army, give a full insight into the principle of HMS and effectively better the utilization and maintenance of military of military equipment and study on the HMS test system . KEY WORDS: Helmet Mounted Sight,test system,Step motor,Control system
FPGA Implementation for CCD Driving and Laser Spot Position Detection
Authors: Liu Quan , Yang Xu , Mu Yi Ning
Published: January 2014

CCD sensor can be used as the imaging device in the initial aiming processing for the beacon laser, and can also be used as the detecting device for the communication lasers optical axis alignment error of the targeting captured trace (APT) unit in space laser communication system. In this paper, based on a double-FPGA structure, we proposed technical solutions to realize the imaging CCD sensor driving and the laser spot position detection algorithm for the CX285AL image sensor by using the overall design of the system block diagram. The spot position detection wave door track centroid algorithm for CCD sensor is also studied by using the analysis of laser transmission characteristics of the atmospheric turbulence. The simulation analysis and field tests have been verified the feasibility of this approach.
Remote Control Stepper Motor Based on the GPRS
Authors: Li Hai Xia , Zeng Jie Hui
Published: January 2014

This design uses GPRS wireless communication technology to achieve remote control of the stepper motor. The system design the software of upper machine by the VC++ based on the TCP/IP protocol. The wireless module SIM300 transfers data to the primary station by its GPRS function. Then the primary station converters the input into differential signal and send commands to slave stations via RS485 and Modbusprotocol. According to the commands, slave stations output the corresponding control signal to the stepper motor. Stepper motor has some protection function when working, such as: acceleration and deceleration and down limit , emergency stop , over-temperature .The result of experiments verifies that the aim of design GPRS-based remote control of stepper motor is realized. It is possible to improve largely both in real-time performance and reliability by using the GPRS wireless technology, it promotes the industrial monitoring and control system more intelligent and informed.
Study on Active Compounds of Apocynum venetum L
Authors: Zhong You Qun , Xu Xiang Qun , Yang Jie , Cheng Ling
Published: January 2014

Although Apocynum leaves have been used for the treatment of cardiovascular diseases, the study on active compounds of Apocynum venetum L. is little. In this paper,high performance liquid chromatography with mass spectrometry (HPLC-MS) were used for the active ingredient in qualitative analysis of Apocynum leaves, based on the information of the mass spectrum molecular ion peak [M-and some characteristic fragment ions, and combined with UV spectral characteristics we initially speculated that Apocynum leaves water extract isolated to 10 components.
Synchronous Issue of IR-Based Large Scale Volume Localization System
Authors: Wu Ying Feng , Li Gang Yan
Published: January 2014

IR-based large scale volume localization system (LSVLS) can localize the mobile robot working in large volume, which is constituted referring to the MSCMS-II. Hundreds cameras in LSVLS must be connected to the control station (PC) through network. Synchronization of cameras which are mounted on different control stations is significant, because the image acquisition of the target must be synchronous to ensure that the target is localized precisely. Software synchronization method is adopted to ensure the synchronization of camera. The mean value of standard deviation of eight cameras mounted on two workstations is 12.53ms, the localization performance of LSVLS is enhanced.
Using PVA and PVA & Cationic Starch to Improve the Strength of High-Yield Pulp
Authors: Sun Yun Yun , Kong Fan Gong , Wang Shou Juan , Wu Qin
Published: January 2014

Dry strength additives play an important roll in papermaking process. In this work, we aimed at analyzing the performance of poly vinyl alcohols (PVA) and PVA & cationic starch (CS), as dry strength additives, on the properties of high-yield pulp (HYP). Various dosages of PVA were applied on HYP under various conditions and the corresponding pulp properties were evaluated. It was observed that PVA increased the strength properties of the HYP significantly, and the enhanced strength properties can be kept even after refining, which gave a promising application of this method in conventional pulping process. The best conditions of PVA for dosage, pH, pulp consistency and time was 20 mg/g, 6.0, 3% and 10 min, respectively. The application of CS, combined with PVA, can further improve the final physical strength properties of HYP. The results obtained from using PVA & CS were more effective than those obtained from using only PVA.
Research on Simulation of Applying SVC and STATCOM to Power System in Enterprises
Authors: Li Si Yu , Huang Jia Dong
Published: January 2014

Reactive power compensation utilizing SVC and STATCOM is the most important method to improve power quality. In this paper, the technical features of SVC and STATCOM are introduced and then a power system in enterprises is used as an example in order to show effectiveness of SVC and STATCOM. Determination of location where SVC and STATCOM should be installed and their capacity is important for enhancement of power system voltage stability. Considering different kind of failure in power grid in enterprises, this paper gives analysis of voltage changes and motor load losses of the power system, on the meantime taking into account of the influence of external grid failure. Based on PSD-BPA software and mathematical model, the optimal design program of reactive power compensation utilizing STATCOM is determined by comparing effectiveness of SVC and STATCOM. Test results show very encouraging result.
Analyze a Feedback System with the R-H Stability Criterion
Authors: Sun Ying , Yan Wei
Published: January 2014

From a practical point of view, a closed-loop feedback system that is unstable is of little value. Many control systems are subject to extraneous disturbance signals that cause the system to provide an inaccurate output. The Routh-Hurwitz criterion ascertains the absolute stability of a system by determining whether any of the roots of the characteristic equation lie in the right half of the s-plane. This study concludes with a stability analysis based on the Routh-Hurwitz method.
A Competitive Model Reaction for the Ribosomal Peptide Bond Formation Catalyzed by Peptidyl Transferase
Authors: Cheng Lin , Hong Nian , Xu Xiang Qun , Yang Jie , Zhong You Quan
Published: January 2014

In this work, a series of theoretical methods were employed to investigate the reaction mechanisms of ribosomal peptide bond formation catalyzed by peptidyl transferase. For the studies described in this paper, reaction pathways and free energy barriers for the model reaction of the peptide bond synthesis were studied by performing Ab initio calculation. Two self-consistent reaction field (SCRF) methods were used to calculate of the whole reaction pathway. These results show that the present theoretical reaction mechanism is a potential and competitive one for the reaction modeling of the ribosomal peptide synthesis.
Design and Application of Low Power Wireless Temperature-Measuring System about Wine Fermentation
Authors: Sun Shun Yuan , Wang Zhi Yong , Zhang Ya Nan , Xu Bao Guo
Published: January 2014

Aiming at the problem that the temperature measurement is backward in wine solid-state fermentation. In this paper, a wireless temperature-measuring system for monitoring the change of fermentation temperature describes the detailed analysis of the system architecture, hardware and software. The system based on low-power microprocessor STM8L, with SI4463 as wireless communication module, and LABVIEW as development platform. The system ensures its accuracy by method of least squares piecewise fitting the relation between PT100 resistance and temperature. The nodes use hopping mechanism, periodic sleep and wake-on-radio mechanism to make communication path for the MAC layer stable and decrease the power consumption. The system has a stable performance and has achieved good results in practical application.
Research on Real-Time Monitoring and Data Management of Hydraulic Test System Based on LabVIEW
Authors: Liu Xing , Zhang Zhi Jing , Li Shi Zhong , Jin Xin , Zhang Gao Yang
Published: January 2014

For real-time data management needs of multiple components, sets and workshops hydraulic experimental platforms, a new distributed system of real-time monitoring and data management based on LabVIEW was developed, by solving following key technologies: hydraulic data real-time monitoring and acquisition at remote distance, data management and reappearance, fault diagnosis expert system in test process. Through the experiment, monitoring in real-time and the operability of data management are confirmed.
The Random Sampling Method for Gas Sensing Signal Based on Compressed Sensing
Authors: Luo Qing , Yang Bao He , Li Dong Mei
Published: January 2014

This paper presents a random sampling method for gas signal,which is based on the principle called compressed sensing. This method is suitable for gas sensor network, and it is conducive to the realization of low power, low cost of the gas sensor network. According to the characteristics of the output signal of gas sensor, we design the random sampling method which acquire the useful information in signal. Using compressed sensing recovery algorithm to reconstruct signal,we finally fulfill complete signal collection. The simulation results show that the method we proposed can achieve signal acquisition with a sampling frequency less than 1/5 of standard sampling frequency.
Comparative Study on Sweat Fingerprints Photographic Effects between Full-Band CCD and UV Observing Photograph Systems
Authors: Tao Dai Qin , Liu Tao , Dong Yan , He Yong Jie , Yang Bin
Published: January 2014

Using the full-band CCD (PL4240 UV, FLI) and Yunnan Zhihai ultraviolet observation camera system (UVYNZH-II) shoot sweat fingerprints on A4 wrapper and A4 printing paper, to comparatively analyze the effects these two camera systems. The clarity and contrast of ultraviolet image captured from Full-band CCD is better than from UV observation camera system, but both devices are able to reflect the fingerprint ridge characteristics. For sweat fingerprints, it is better for the full-band CCD, but under good conditions for sweat fingerprints bridges, UV observation camera system can basically meet the requirements of sweat fingerprint UV shooting.
Research and Realization of ADO.NET Database Access Technology
Authors: Zhou Xia , Zhuo Zhi Hong
Published: January 2014

The ADO.NET is a brand-new data access technique of the Microsoft. It is the bridge of the .NET application and database communication, which use the XML to exchange data, and add many new program interface to access simply database. This paper introduce the structure, feature and inner object of the ADO.NET, and analysis database access technique of the ADO.NET, give the method of the ADO.NET connection various kinds of database. Finally, an example of the C# connection SQLSEVER database is enumerated, and the detailed implementation code is given.
GSPN-Based Modeling of Virtual Teams Building in Collaborative Process Planning
Authors: Su Ying Ying , Liang Di , Dong Hai
Published: January 2014

Virtual teams have been adopted by organizations to gain competitive advantages in this global economy. It was extremely important of modeling for virtual teams building in collaborative process planning. Based on the flow analysis of virtual teams building in collaborative process planning, the relationship of actual virtual teams building and the elements of GSPN were studied. Finally, the modeling method generalized stochastic Petri nets (GSPN) - based was proposed and the model can excellently describe the flow of virtual teams building in collaborative process planning.
Constraint Programming Method for Crew Schedule Recovery
Authors: Zhu Bo , Cao Xiang Ling , Wang Yu , Gao Qiang
Published: January 2014

Unexpected disruptions such as aircraft failure and airport closure often make the original flight schedule cannot operate regularly and destroy the crew duties. This paper proposed a constraint programming model to solve the crew recovery problem. The total recovery cost was taken as the objective function, temporal-spacial requirements, deadheading and time legalities were considered as constraints. An algorithm based on sequential, least slack and greedy thoughts was designed to search the solution space. Finally, an example was test to indicated feasibility of the proposed model and algorithm.
Direction Finding Using Rotated Long Baseline Interferometer
Authors: Zhang Min , Guo Fu Cheng , Zhou Yi Yu
Published: January 2014

To reduce the hardware cost of traditional multichannel array or interferometer, a direction finding method using rotated long baseline interferometer (RLBI) has been developed. To overcome the initialization problem, a multiple hypothesis Gauss-Newton (MHGN) algorithm is proposed. It first chooses multiple initial pairs from a pair of PD measurements and then applies each value to the GN algorithm and meanwhile obtains a cost for this initial value. Finally, the ultimate estimate is then picked with the minimum cost. Simulation shows that the proposed method can approach to the Cramer-Rao lower bound (CRLB).
Identification of Tool Based on Decision Fusion of Multi Features
Authors: Wang Jia Jing , Zhang Shu Sheng , He Wei Ping
Published: January 2014

In order to solve the problem of bar code failure because of inadequate protection, pollution and other factors in the process of production, presented a new multi-information fusion technology used of residual bar code information, shape, texture and the weight information to identify the tool information in the database and recovery the tool identification. Experimental results show that the proposed scheme has better performance in accuracy, robustness and efficiency, can fully satisfy the actual requirement in production.
Study on an Anti-Collision Algorithm of RFID Based on Binary Searching of Backtracking
Authors: Xu Min Li , Yu Li Juan , Chen Cheng Ming , Cao Shou Qi
Published: January 2014

The problem of anti-collision tag is a common problem of the radio frequency identification (RFID) system. ALOHA algorithm and binary search algorithm is the main algorithm to solve the collision problem. This paper analyzes the effectiveness of binary searching of backtracking algorithm in time slot number of shortening identification tags. Combining the theoretical analysis what needs to be improved in binary searching of backtracking algorithm.
Low-Power On-The-Fly Reconfigurable Iterative MIMO Detection and LDPC Decoding Design
Authors: Rohani Ehsan , Xu Jing Wei , Choi Gwan , Lu Mi
Published: January 2014

Manufacturing and operation of wireless systems require a practical solution for achieving low-power and high-performance when using advance communication apparatus such as that using multiple-input and multiple-output (MIMO). Often algorithm solutions achieve very high performance but over only in a narrow range of operating parameters. This paper presents a hardware design of MIMO detection that allows real-time switching between various algorithms and detection effort to achieve high performance over the wide-range of signal to noise ratio (SNR) found in realistic operating conditions. We illustrate a design with over 80% reduction in detection power that satisfies the required quality of service (QoS) in SNRs (Eb/No) as low as 8.7 dB.
Modification of Cellulosic Fibers and Adsorption of Chromium (VI) Ion from Dilute Aqueous Solution
Authors: Xu Zhen , Liu Wei , Kong Fan Gong , Wang Shou Juan , Chen Hong Lei
Published: January 2014

The removal of Cr (VI) from aqueous solution is paying more and more attention due to the higher concern of environmental influence of this ion. In this paper, the biodegradable cellulosic fibers were modified with the grafting reaction to introduce the amide groups onto the fibers. In the grafting reaction, the toluene diisocyanate was firstly grafted on the surface of natural fibers, and then the 3-Chloro-2-hydroxypropyltrimethylammonium chloride (HPTMAC), as a high efficiency trapping agent of Cr (VI), was introduced through the condensation reaction. The modified fibers was characterized by infrared spectroscopy (IR) and elemental analysis. The modified fibers were applied to adsorb chromium (VI) ion from aqueous solution. The adsorption capability of the modified fibers was evaluated under different pH, time and temperature. The optimal adsorption conditions were obtained. The results showed that the grafted fibers had high efficient adsorption of chromium (VI) ion.
Near-Band IR Small Scene Star Image Segmentation Based on Partial Histogram Grey Level
Authors: Wang Zhe , Yan Zhe , Tan Wei
Published: January 2014

The near-band IR star images segmentation and recognition is key technique in day time star navigation. Due to the scene of near-band IR star imaging relative small and stellar with high star grade are limited. Pertinence and dynamic grey level threshold is necessary for image processing arithmetic. In order to enhance near-band IR star images segmentation and recognition in real-time, this paper present the process of partial histogram grey level threshold and improve for actually near-band IR star images with scene of no more than 1.5°×1.5°. It can reduce the calculation of near-band IR star images with adjustable threshold. And get rid of disturbance of small imaging square stars and noise points.
The Design of Digital Library Platform from the Perspective of Knowledge Management
Authors: Wang Cai Xia , Liu Ning
Published: January 2014

As the fresh product of education informatization, the digital library is not only considered as the new version of traditional library, but also can lead to a new trend of digital reading. It provides the implement of knowledge management of teachers, with the school built as a learning organization. The digital library is designed from a perspective of knowledge management, in order to construct a platform of teachersknowledge management implements and to improve the development of teachersmajor
Research on Horizon Detection Algorithm Based on Dark Channel Prior for Images Captured by UAV
Authors: Xu Bei Bei , Li Jie , Guan Zhen Yu , Yang Huan , Zhang He
Published: January 2014

To detect the horizon for the UAV attitude measurement based on the visual navigation, a horizon detection algorithm based on the dark channel prior in foggy weather is proposed. This algorithm firstly uses the principle of dark channel prior for the haze removal to get the dark channel image, then uses horizontal and vertical Sobel operator to carry on edge detection on the dark channel image, getting the binary image. Finally, detect the horizon through the method of rotating image. Experiment result shows that, this algorithm can effectively detect the horizon and is robust to some complex scenes.
An Automatic Target Recognition Algorithm Based on Support Vector Machine
Authors: Zhang He , Li Jie , Xu Bei Bei
Published: January 2014

To improve the performance of automatic target recognition technology and solve the problems of traditional methods, such as high false alarm rate and poor adaptability to environment changes, a new algorithm based on support vector machine is proposed. We have realized the feature extraction of the target and the parameter optimization of the support vector machine to get the support vector machine model applied to the target recognition of unknown images. Experiment results show that the algorithm has a good recognition effect, a fast recognition speed and certain anti-interference abilities based on sufficient samples training.
Design of FMCW Radar Data Acquisition and Signal Processing System Based on Labview
Authors: Leng Jian Wei , Shan Chuan Bin
Published: January 2014

For virtual instrument technologys character of high performance, easy to implement hardware and software integration, etc., virtual instrument technology and Labview are applied to test fields. Using computer and NI PCI-6221 data acquisition card as the hardware and LabVIEW8.5 software as a development platform, a data acquisition and signal processing virtual test system is built. The system is consisted of signal source and the signal processing module, in which the signal source is he FMCW radar level differential frequency signal connected by data acquisition card; signal processing section includes a time-domain measurement signal source, waveform display, filtering, spectral analysis, etc. Connecting, analysis and processing of FMCW radar level meter difference frequency signal are completed.
Realization of 1024 Points Fast Fourier Transform Based on FPGA IPCore
Authors: Leng Jian Wei , Xu Qiong Qiong
Published: January 2014

Requirement on signal processing of radar level system is higher and higher at present. Standards such as generalization, systematic and modular cannot be satisfied through traditional methods which were using software program, application specific integrated circuit (ASIC) to achieve fast flourier transform (FFT). Therefore taking advantage of field programmable gate array (FPGA) to complete FFT had been the choosing trend of most researchers. Based on arithmetic FFT raised by Cooley-Tukey, a new design scheme of base-4 FFT was put forward in this paper. The design flow of FFT was fairly simple for the rich resource and flexible intellectual property core (IP Core). Simulation and experiment results indicated that this method was easy and flexible, accuracy and reliable. And it can decrease the development period. The calculation speed was also improved greatly.