bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design of Remote and Digital Monitoring System of Public Bus
Authors: Wang Jing Feng
Published: August 2014

Based To solve the problem of incomplete monitoring information,single function and low extensibility of public bus monitoring system,a remote digital monitoring system of public bus based on embedded platform is designed. Bus stop announcer,CAN controller,satisfaction evaluator and other vehicle electronic equipment are integrated into vehicle terminal,which collect,transmit and feedback real time data such as the location of bus,bus station information,running state parameters,satisfaction and vehicle scheduling information. The remote monitoring center receives the data and generates the visualizations webpage at the same time. Bus remote monitoring system is established,and the operation efficiency and security of public bus is improved.After large amounts of running and tests,result of the test indicates the monitoring data received from this system is reliable and stabilized.
Design and Analysis on the Vibration Piston Seal
Authors: Yang Jia
Published: August 2014

Features of the piston reciprocating motion is a high commutation frequency, small displacement, the impact force. Requirements of the piston movement is able to adapt quickly to change. Reducing the resistance movement of the piston will be able to make more flexible movement of the piston .The seal with mating surfaces can reduce the resistance movement . The gap of mating surface of the piston rod formed hydraulic oil spill. Mating surface seal problem is that the oil leakage is larger。Piston movement way of hydraulic vibrator is a kind of variable frequency and variable amplitude, in the form of constant flow. The form of the oil cylinder and the piston movement is the same. The cylinder as the output component of hydraulic vibrator output movement is to reduce the leakage .
Method of License Plate Location Based on Mathematical Morphology and Color Characteristics
Authors: Lian Ning , Xu Yan  Lei
Published: August 2014

According to restrictions existing in the application of single license plate location algorithm in complicated background. A license plate location algorithm based on mathematical morphology and color characteristics is proposed. Firstly, the new method uses Ostu algorithm to select an optimal threshold, and according to the threshold carries on binary processing, then by using a new method of mathematical morphology for image edge detection. Finally combined mathematical morphology with color characteristic to locate license plate .Experiments show that this new method with higher accuracy and fewer restrictions on background is superior to traditional or a single method and can be widely used.
Study on the Method of Android System Cloud Monitoring Information Based on SVM
Authors: Zhang Kai , Yu Hang
Published: August 2014

In recent years, android system has become a mobile device is especially preferred intelligent mobile phone operating system, like Microsoft window system, Android operating system is also subject to a variety of mobile phone viruses, Trojans and other malicious software attacks, resulting in the leakage of personal information, the harm of spam messages continuously, in order to solve these problems in this paper for the known virus Trojan cloud monitoring and detecting light client burden increase sample detection efficiency; using SVM to unknown trojan virus (support vector machine) short sequences of API function calls the LINUX classification, analysis of the API function of each call with precise improve classification support vector machine the danger coefficient after integration, to distinguish the Trojan virus, in order to achieve information security protection system role.
Comprehensive Colliery Safety Monitoring System Design Based on Wireless Sensor Network
Authors: Sun Ming , Cheng Yong Bing
Published: August 2014

This paper briefly summarized the logical structure of the model’s attribute characteristics in the wireless sensor network management system of coal enterprise. Due to all kinds of mapping relations between different datum, while extracting some device status information, we can detect it by the method of hierarchical search, and according to the determined geographical location, then obtain the attribute and graphic information, finally get all the relative information of the device, so that the information management system is fast and convenient to be used.
Based Embedded System Applications in Intelligent Home Remote Monitoring
Authors: Li Yang , Wu Qing Hong , Xiao Xue
Published: August 2014

With the continuous improvement of security awareness, home security has become the focus of attention. The actual demand for home video surveillance system, designed a cheap, practical, small size and low power consumption of video surveillance systems, this paper uses microprocessor S3C2440 ARM9 core as the core hardware control, embedded Linux operating system with software the control core, and cheap, generic USB camera video capture device as a front end to complete the design of a home video surveillance system.
Analysis Based on iOS Application Malicious Behavior Detection
Authors: Wu Yin He , Li Dai Ping
Published: August 2014

Due to the highly developed modern technology,Smart phones and other mobile devices are become more and more universal. Most of those devices are used to process or store sensitive and confidential data.Consequently,it may cause many problems,such as privacy disclosure,mobile phone virus,spyware,etc. In order to solve those issues,We need to monitor applications`s behaviour to tell those malicious ones. Here we use MobileSubstrate to hook every sensitive system API the application invokes in iOS planform,and send this invocation to our matching algorithm,the matching algorithm will evaluate if the API are being invoked in a safe way according to Application API Review Model.If a application trying to call some APIs which is totally unnecessary,we can reject this invoke and give user a warning.
GPS Based Location Prediction and Authentication during Inter-MSC Handover
Authors: Regin Bose K. , Sankaranarayanan V.
Published: August 2014

In this paper a reliable secured handover with less time delay is suggested. To enhance the reliability of data transfer during handover, the exact location of the Mobile Node (MN) is to be known. Hence a GPS based Mobile Node location and direction prediction is suggested, which helps to handover to the appropriate Base Station. The security in transfer of data is ensured by a novel Mobile Information Centre (MIC) based dual authentication algorithm.
Three Pulse Cable Fault Detection Method Based on Wavelet Threshold Denoising
Authors: Liu Jian Ye , Yao Yu Xiang
Published: August 2014

This paper introduced the principle of three pulse method and the method’s advantages and disadvantages on cable fault detection, modeled three pulse detection method of cable fault in the Simulink environment, analyzed the Wavelet threshold denoising effect on cable fault detection accuracy under different threshold selection rules, and proposed a three pulse detection method based on the wavelet threshold de-noising.
Optimization Design of Lifting Beam for Heavy Engine Compartment Based on Ansys Workbench
Authors: Wang Bao Jun , Tao Yi , Li Jiang Wei , Chang Rui Chao , Zong Lei Qiang
Published: August 2014

The mechanical analysis of the lifting beam for heavy engine compartment was analyzed by traditional theoretical mechanics and material mechanics methods, and the basic structural shape of the lifting beam was design. The FEM intensity analysis, strength check and the structural optimization design of the lifting beam were carried out by making use of the software of ANSYS Workbench, and the reasonable structural shape and size of the section were got. Through optimization design, the material was saved, the weight of the lifting beam was lessened, and the economic benefit was improved.
The Identification and Treatment of Arc Suppression Coil Fault
Authors: Zhang Hong , Zhu Yi , Li Yong Qin , Bai Hong , Zhang Qiang , Li Jian Feng , Zhao Qi Dong , Liu Tong Du
Published: August 2014

Arc suppression coil has been applied widely in power system.It focuses on the fault that arc suppression coil often appears in the process, and divides to the nature of the faults. We also take corresponding treatment methods for different faults at the same time. This article introduces the failure processing methods of the arc suppression coil in detail, expounding respectively that the general failure processing methods, the abnormal failure processing methods of arc suppression coil, the action failure processing methods and the discontinued failure processing methods.
Development of Response Time Tester
Authors: Yu Hai Xi , Lin Feng , Cai Hui , Shao Jian Wen
Published: August 2014

In order to solve the difficult problem of the transmission-type smoke meter response time, which needs to be settled urgently, response time testers have been developed, according to China's metrological verification regulation JJG 976-2010《Calibration procedures of transmission-type smoke meter》. The tester integrated several communication protocols of transmission-type smoke meter manufacturers, takes measurements at every 20ms, draws absorptance N curves in real time and displays the final response time in man-machine interface. The measuring range of the tester is (600~2000) ms, and the error is ±20ms. It is very convenient, fast, and accurate to verify for transmission–type smoke meter and traffic analyzer.
Research on Rolling Bearing Fault Monitoring System Based on LabVIEW
Authors: Shi Li Juan , Zhang Chun Zhi , Chen Jin Ying , Li Zhao Kun
Published: August 2014

This paper mainly introduces monitoring principle, montitoring methods and development process of hardware and software of rolling bearing fault monitoring system based on LabVIEW. The system makes full use of computer technology, data acquisition, signal analysis and processing techniques, and fault diagnosis theory to improve monitoring and fault diagnosis of rolling bearing. The system also integrates the functions of traditional detecting instrument and provides a friendly man-machine interface which can display online data.
Monitor Design of Hydraulic Experimental System for Electric Submersible Pump
Authors: Chen Shi Peng , Jia Guang Zheng , Ren Yong Liang , Cai Yong Peng
Published: August 2014

A hydraulic experimental monitor system for electric submersible pump (ESP) was designed, which contains data acquisition and monitor interface. Data acquisition applied Advantech Data Acquisition and Siemens Programmable Logic Controller (PLC). Monitor interface applied Monitor and Control Generated System (MCGS). The results prove that the system can control the speed of ESP and display and record many signals, such as flow-rate, pressure, torque, rotation speed, liquid level, etc. The ways of converting analog signals, processing pulse signal and controlling speed are introduced.
A Novel Vehicle Type Recognition Based on Hierarchical Matching
Authors: Zhang Zhong Xing , Li Tao , Xiang Tao , Liu Min Juan
Published: August 2014

A novel method of vehicle type recognition based on template matching is proposed to improve the real-time performance of the vehicle type recognition in real traffic scenes. GRM is applied and the template is normalized for realizing parallel template matching. Then, we realize the rapid vehicle type recognition through lookup tables by the hierarchical index of vehicle type template with k-means clustering and size normalization processing. The results show that the algorithm can recognize vehicle type in traffic scenes efficiently.
Modeling and Simulation of the Relationship of the Bearing Pressure and Area of Building
Authors: Qi Yu Qing
Published: August 2014

building bearing pressure detection has been one of the hot issues in the field of architecture research. Traditional methods for building bearing pressure detection are to calculate the bearing area, which is difficult to reach the accuracy in point level. It is primarily because the large range of signal distribution, resulting the weakened correlation signal. To solve this problem, an opening reinforcement method is proposed based on pressure - area stress calculation. Compared calculation between building bearing pressure and area is performed in this method to ensure that the search area is minimized, thereby obtaining an accurate supporting point of building bearing pressure. The simulation experiment shows that the effect of the method for locating the building bearing pressure point calculation is better, and it has a higher accuracy.
Spectrophotometric Method in the Determination of Aminophylline Content
Authors: Lei Yan Hong
Published: August 2014

A selective method was developed for the determination of aminophylline by Spectrophotometric method. The method was simple with high sensitivity and selectivity.It was shown that recovery of the method by standard addition method was respectively valued 99.21% for aminophylline.
Buses Running State Based on the Technology of 4G Wireless Monitoring System Research
Authors: Liu Qiang , Wang Jun , Zhao Hang
Published: August 2014

Buses running state based on the technology of "4G" wireless monitoring system has bus dynamic information query, vehicle dynamic tracking, vehicle scheduling, vehicle classification management four big functions. The system has nine subsystems respectively complete vehicle GPS positioning, operations management, IC card charging management, large screen display control center, vehicle operation coordination, GIS data query and selection, mobile communications, exception handling, information service, etc. The system applied to public transport vehicle scheduling management, the results show that can alleviate the urban public traffic congestion, improve line of vehicle safety, improve the efficiency of the vehicle running, reduce the air pollution in cities.
Test Noise Procedures for Transport Category and Turbojet Airplanes
Authors: Yan Guo Hua , Song Wen Qian , Liu Shi Qi
Published: August 2014

Aircraft noise is the chief source of the airport and its peripheral areas. CCAR imposes restriction on specific categories of aircraft and requires more strict measurements of the noise. More scientific measurement method is required to meet the progressively tighter certification standards. Test noise procedures for transport category and turbojet airplanes are analyzed in this paper. The main aspects involved are: test sit requirements, aircraft flight path guidance, aircraft position determination, take off tests, lateral tests and approach tests.
The Ice Thickness System Design Based on PCap01 with High Accuracy
Authors: Wang Zhi Chun , Wang Jian Hang , Li Wen Tao , Li Zhong Hu
Published: August 2014

In the process of water-into-ice, the capacitance will be changed, the ice thickness can be obtained indirectly through the detection of capacitance. This paper introduced an ice thickness measurement method based on PCap01 high precision micro capacitance measurement chip. The system designed with this method takes low power micro-controller MSP430F149 as the core, Labview as PC. The communication between PCap01 and MSP430F149 through the SPI bus, then the PC realizes the real-time data display and storage. Experimental results show that, the system has the advantages of simple structure, high precision, strong practicability, low power consumption, it is very suitable for the measurement.
Image Register Based on PSO and Error Mechanism
Authors: Lv Chang Liang , Feng Gui Lan
Published: August 2014

When applying the standard particle swarm algorithm to image registering, it has a problem of convergence and the speed of the convergence. Aiming at this, we proposed a modified particle swarm optimization; a simple error correction mechanism is introduced into the update process of the particle, so that the particle’s error evolution can be corrected in time. To test the novel algorithm, we used a typical function to identify it. It can be seen from the simulation results that the convergence ability and the convergence speed of the new algorithm was increased effectively. Then applying the PSO algorithm to image registering, the experiment result is good.
Intelligent Campus Monitoring Platform Design Based on Internet of Things
Authors: Zhang Ting Ting
Published: August 2014

Based on the Internet of things, this paper brings forwards the general design framework of the system construction and analyzes its functions. We make the construction figure with the media of RFID, sensor and two-dimensional bar code, propose four aspects to construct intelligent campus mobile service applications and make functional planning to mobile educational administration, mobile library, mobile office, mobile admissions and five mobile service centers.
Correcting Algorithms of the Spinning Projectile Attitude Based on the Background Magnetic Field Compensation
Authors: QI Ke Yu , Xiang Chao , Bu Xiong Zhu , Shao Jun Yu
Published: August 2014

At present, traditional navigation method could not provide long-time stability attitude information for the high spinning projectile because of drift errors of micro-inertial sensors. Meanwhile, the projectile attitude measuring method with respect to the earth's magnetic field is still auxiliary. The principle of characteristic ratio algorithm and compensation model of the background magnetic field for the spinning projectile are been introduced. To realize the high accuracy attitude measuring of the projectile, a new correcting method is proposed. The detail correcting steps are derived with the linear interpolation theory and iterative algorithm. On this basis, numerical simulation is conducted combining with projectile's flight rules. The results show that the corrected attitude angles errors are within, and attitude update rate increased obviously. The calculating results could better describe the whole real roll motion. The proposed correcting method is significantly effective.
Design of Handheld Oscilloscope Based on FPGA and Dual-ADCs
Authors: Wu Ya Ping , Gao Jun
Published: August 2014

STM32 as an embedded processor is utilized as the control unit of the handheld oscilloscope, and the data is processed by the FPGA. Voltage signal is collected by probes, and then converted into digital signal after being amplified. Digital signal is showed on the TFT screen after the FIFO processing in FPGA and digital signal processing .The dual ADCs are used to convert analog signal into digital signal so as to double sampling rate, which is an effective and economic way to improve the performance of oscilloscope. At the same time, the figure displayed on the screen can be adjusted manually and provide the information of voltage and frequency. The test results show that the oscilloscope has very good performance.
Theory and Experiments of Injection-Locked Oscillator
Authors: Hao Yuan , Wang Li Cai , Du Qing Lei , Wang Fei Cheng
Published: August 2014

Injection-locking technique is receiving increasing interest in industrial applications, which is especially suitable for smart antenna array, but relative experiments are complicated. The article focuses on the theory and experiment of the technique. Firstly, section 2 reviews the theory of injection-locking technique, and summarizes two useful conclusions on injection-locking bandwidth and phase difference adjusting bound of the phenomena. Secondly, section 3 describes experiments using commercial microwave integrated circuit (MMIC) voltage controlled oscillator (VCO), which is reduces the experimental conditions. Experiments results perform very well.
Design and Implementation of Indoor Positioning System Node Based on Wireless Sensor Network
Authors: Li Wei Ping , Yang Jie , Kisu Kim , Sun Wei
Published: August 2014

Recently, with the rapid development of the Internet industry, wireless sensor network technology has received much attention of researchers both at home and abroad. Wireless sensor network node has become one of the basic researches of wireless sensor network. Because there are many problems to be solved, such as a balance of power, transmission efficiency, routing mechanism, cost control and node management, it also has always been the hot spot of the researchers. Wireless sensor network applications, such as navigation guides, object recognition, object positioning all require information service based on location, so wireless sensor network positioning technology is the precondition of the application implementation.
A Hydroacoustic Transponder Based on the Principle of Laser Interferometry
Authors: Yuan Jian , Jin Guang Hu , Liu Jun Li , Zhou Zhong Hai
Published: August 2014

The hydroacoustic transponder based on the principle of laser interferometry is investigated, which consists of three parts: 1) the front-end module, which is a signal receiving and pre-processing module, and consists of a laser interferometric receiver and a filter group; 2) the signal processing module, which consists of the data acquisition module and a data processing system; 3) the back-pulse module, which consists of an automatic gain adjustment module, a transmitter module and a back-transducer. We give the detailed designing flow charts of the hardware and software programs.
The Design of Magnetic Levitation Showcase for Small Commodities
Authors: Feng Hai Qin
Published: August 2014

This paper combines the maglev concept and commodity display. The commodity and the permanent magnet are hanged together and put under electromagnet, the distance from permanent magnet to magnet detected by Holzer components, and then the magnet position signal is amplified and formed a strong negative feedback control loop which can control the current of solenoid coil, at last we can hang on the different weight goods through changing the size of the electromagnet attraction.
Analysis of Tropospheric Correction Models in Navigation Satellite System
Authors: Chen Rui Qiong , Liu Ya , Li Xiao Hui
Published: August 2014

In order to obtain high-precision navigation satellite system time, the errors of navigation satellite system signal need to be calibrated during its transmission, among which, troposphere delay is one of the major errors of navigation satellite system precision positioning. The calibration of troposphere delay has been compared and studied on the basis of model function theory. The troposphere models described include Marini model, Hopfield model, Saastamoinen model, Black model, and the impact extent of meteorological parameters like temperature, pressure, humidity and geographic information of observation station have been analysed quantitatively, which have been systematically analysed the characteristic of troposphere delay and the accuracy of error calibration model. Moreover, by using the data collected by IGS tracking stations to validate the analysis results of models, which has shown that Black model is better than other models when it comes to the extent of meteorological influence and also superior to the troposphere delay generated by the internal calibration model in GPS receiver.
A Nonlinear Model for Marine High-Voltage Transformer
Authors: Zhang Ling Jie , Sun Cai Qin , Sun Jian Bo
Published: August 2014

A nonlinear model for the marine high-voltage transformer is established which based on the J-A theory , considered the eddy current loss. This model accurately reflects the nonlinear characteristics of the transformer, and does well in describing the dynamic process, it is propitious to design the ship transformer and the study of relay protection. A fourth-order Runge-Kutta algorithm is used to solve the nonlinear differential equations to ensure the model has a high accuracy, and the pre-magnetizing model is also established. At last, through the transformer no-load closing simulation results verified the correctness of the model.
The Stabilization of Switched Time-Delay Linear Systems with Input Saturation
Authors: Jing Li , Liu Li
Published: August 2014

We focused on the stabilization of switched linear systems with time-delay and input saturation. First, the saturation part of each subsystem was dealt with by a new method and the system was transformed into a general switched system. Secondly, we proposed a sufficient condition for system stability based on Multi - Lyapunov Function. The sufficient condition is expressed into LMI and can be solved with MatLab. Further, we designed the system controller.
Micromouse Digital Circuits Design with FPGA
Authors: Zhang Hao Ming , Peh Lian Soon , Wang Ying Hai
Published: August 2014

Micromouse is a small autonomous robot, which must navigate itself through an unknown maze and solve the maze information.One of the main challenges for micromouse is to solve the maze after searching and find the optimum path, then the mouse must dash from the start to desitnation in the shortest time possible using its own artificial intelligence without any external source of help. In order to increase its dash speed and stability,detailed design of digital cirucits based on FPGA were given, also with their simulaiton. Results show that digital circuits can check and ensure the reading of encoder, and can change the duty cycle of PWM output.
Research on a New Rotary Transformer Device
Authors: Xie Sheng Li , Fang Jing , Chang Ying Jun , Ning Bor
Published: August 2014

Using the principle of electromagnetic induction, we designed the new rotary transformer device which secondary winding can rotate with the prime mover. The device not only achieves the purpose that provides synchronous generator with AC power of exciting side, but also can eliminate the impact of slip ring and carbon brushes fundamentally on the system. The test results of the prototype also show that the design of the rotary transformer described herein is possible.
Real-Time Suppression Technology Research on Shaft-Rate Electric Field
Authors: Sun Jun Zhong , Jiang Hai Long , Xia Zhen Sheng , Wang Kuo Ting
Published: August 2014

To reduce the impact of shaft-rate electric field (SRE) on the concealment of the ship, the SRE related ship electrical equivalent model is established, and the electrical properties are studied based on the analysis of the mechanism of SRE of the ship in this paper. The ship SRE real-time suppression is proposed based on the compensated negative potential and the real-time close-loop system for the ship SRE suppression is designed. The extremely low frequency electric field strength is reduced greatly, and the shaft-rate and its harmonics field are eliminated ultimately. Experimental results show that the ship SRE can be suppressed effectively by the system, and the concealment of the ship is enhanced.
Compact Wideband Fourth-Order LTCC Filter Using LC Resonators
Authors: Zhang Yan Ming , Wang Jia Nan , Cai Yu Ting
Published: August 2014

A compact LTCC filter using LC resonators is presented. The resonator is made up of the multilayer capacitors and inductors, which are printed on multilayer ceramic. Four resonators are exploited, which makes the filter have wide passband. By properly controlling the coupling elements of each resonator, two transmission zeros can be located at both sides of the passband for better selectivity. Measured results show a bandwidth of more than 47.2%, where the centre frequency is 1.25GHz. The whole size of the filter is 4.5×3.2×1.7mm3.
CMA Blind Equalization with Variable Momentum Based on Nonlinear Transformation Function
Authors: Xiao Ying , Ruan Rui
Published: August 2014

For the contradiction between convergence rate and convergence precision in the CMA blind equalization with the fixed momentum factor, a variable momentum CMA blind equalization is proposed The output error power of the blind equalizer is acted as the parameter, which control the adjustment of the momentum factor adaptively based on nonlinear transformation function. The algorithm can obtain faster convergence rate and higher convergence precision, also the performance of the blind equalization is improved. The simulation results show that, compared with the CMA blind equalization with the fixed momentum factor, CMA blind equalization with variable momentum based on nonlinear transform can obtain better performance
Magnetic Coupling Resonance System Parameters Research of Wireless Power Transmission
Authors: Xing Li Kun , Wang Wen Jing
Published: August 2014

The paper first introduced the magnetic coupling resonance wireless power transfer system principle, the coupling model theory, etc. Through matab program, the paper could get advice system parameters according to the specific load, the needed transmission distance and transmit power of the system. These parameters give guidance to the system design, which is verified through examples.
The Output Characteristics of Smith-Purcell Free Electron Laser Based on an All-Feedback Resonator
Authors: Meng Xian Zhu , Wang Ming Hong , Zhang Li Ming , Ren Zhong Min
Published: August 2014

We investigate the output characteristics of Smith-Purcell free electron laser based on an all-feedback resonator by theoretic analysis and particle-in-cell simulation method. The simulation results show that the output power spectrum density is different with different azimuthal angle range in this device. The output power spectrum density on azimuthal angle curve is a nonlinear curve. This output characteristics is important to design the port of this device.
Development of Side-Polished Fiber Filters
Authors: Zhang Shao Xian , Liu Chun Yu , Ye Hong An
Published: August 2014

A fiber filter based on side-polished method is proposed. Using Fresnel's law explains how it works. The filter output the following wavelengths, 1514.9 nm, 1532.9 nm, 1551.7 nm and 1569.0 nm and the isolation between channels up to 18 dB.
The Design of Image Acquisition System Based on CMOS Image Sensor USB Interface
Authors: Zhang Yu , Wang Chun Yang
Published: August 2014

The system selected OmniVisiON company's CMOS chip OV7620, it is an integrated color camera chip, a 640 × 480 (300,000 pixels) image matrix. Considered that the CPLD control system is similar to the DMA mode of data transmission; Cypress's USB 2.0 chip is used by CY7C68013 chip. Finally, it is become the microcontroller firmware and device driver. The paper presents the design of Image acquisition system based on CMOS image sensor USB interface. Design an image acquisition and transmission system, and describes its firmware as well as the development of USB device drivers and PC-side application .
Research of Steady Acquisition Method of Large-Scale Electronic Circuit Shorted Signal
Authors: Liu De Wang
Published: August 2014

Large-scale electronic circuits need to collect shorted signal to meet the control requirements of closing phase angle in high voltage circuit breaker testing process. . In this paper, by using photovoltaic technology and the design of a new synchronous voltage signal acquisition device, a stable, accurate voltage signal is got. This paper mainly introduces the principle, structure, advantages and applications of signal transmission interference problems of the new synchronous voltage signal acquisition device. The practical application showed that the functions of synchronization acquisition device have reached the designed requirements, which highly improves the stability of the short-circuit signal acquisition.
A Low-Voltage Distribution Box with Energy Monitoring and Carrier Communication Functions
Authors: Zhou Wen Qiong , Li Da Jun
Published: August 2014

A low-voltage distribution box with both energy monitoring and carrier communication capability is developed to collect , store and transmit multi-channel current, voltage , power, and electrical degree surveillance and other information, and the detail of its hardware design is described, ARM9 chip is used as a microcontroller, AD8364 with six channels is applied to ensure the speed and accuracy of data acquisition, the carrier chip ST7538 is adopted to transmit the acquired information to concentrator at specific time. The investment cost of the distribution box is low, and easy to be installed and maintained, and can be widely used in various industries for middle and small-sized enterprises.
Embedded Dynamic Security Networking Technology Based on Fast Jump and Trust Degree
Authors: Zheng Wen Kui , Jin Man
Published: August 2014

The traditional embedded system networking technology ignores the security of network systems, either ignores fast networking requirements of network system, these requirements can be achieved at the same time. A embedded dynamic security networking technology based on fast jump and trust degree is proposed, when systems is networking, the use of random beating from multiple network nodes and fast switching optimize network search methods. Experimental results show that the proposed method can detect distribution of systems security risks accurately, and has a good application value for network security.
Effects of Phase Jitter on the Navigation Signal Simulator
Authors: Pang Jing , Mou Wei Hua , Tang Xiao Mei , Ou Gang
Published: August 2014

As the measuring equipment of the navigation receivers, high precision pseudorange signal is generated by navigation signal simulator. Pseudorange error is mainly from modeling error in high dynamic scenarios, but it is mainly from phase quantization error of digital implementation process in high precision scenarios of evaluating receiver’s pseudorange accuracy. Is this paper, according to the implementation principle of carrier and code DDS, the causes of the phase quantization error is analyzed and the pseudorange error formula is derived and the simulation results are given. Analysis and simulation results show that phase critter originated by carry phase truncation effects measurement result of zero value and cannot be ignored. The conclusion can guide the design of navigation signal simulator.
Capacitor-Coupled ECG System for Wearable Equipment
Authors: Zhou Yong , Xu Fei , Zhang Yuan Xi , Shen Yong Dong
Published: August 2014

A design of capacitor-coupled ECG test system is introduced here. The extremely weak ECG signal was picked up with capacitor coupling sensor, and was then buffered, filtered and magnified to fit the requirement of analog digital converter. The measured data was then converted and processed by a microcontroller. The ECG signal can be recovered and stored, analyzed by intelligent terminal. The test shows that this method is applicable and would be used widely.
A Cost-Effective Approach of Hardware Random Number Generator
Authors: Xiao Xiao , Ye Li Xuan , Pu Jun
Published: August 2014

This paper shows the research on hardware random number generator (HRNG). As truly random numbers are strongly required in encryption and computer simulation areas, developing a simple and inexpensive HRNG has significant value. The whole system is divided into the noise generating module and the processing module. After the numbers are generated, a randomness test has been carried out which indicates that the random numbers generated are truly random. It is concluded that the final product of this HRNG meets the requirements of the objectives.
The Study on Harmonic of Photovoltaic Inverter Based on RTDS
Authors: Xu Wen Li , Bao Wei , Wang Ju Bo , Zhang Pan
Published: August 2014

Puts forward a kind of new harmonic study bases on photovoltaic merged into the distribution network through real-time simulation method: Build a model and control model in RTDS real time simulation system, by adding LCL filter, optimizing of filter parameters, analyzing harmonics of the data. At last analyzes the experimental results by using harmonic analysis module in MATLAB.
Research on a Dynamic Reactive Power Compensation Method of Composite Power Load
Authors: Cheng Qi Jian , Chen Jing , Yuan You Xin , Zhou Xue Song , Deng Shi Jie
Published: August 2014

A large number of inductive loads need the reactive power, and the amount of the reactive power compensation is different in a state of work. The traditional static reactive power compensator is difficult to meet the needs of the reactive power compensation for the composite load reactive. Therefore, a dynamic reactive power compensation method of the composite power load is proposed in this paper. The following works have been done in the study: principle of dynamic reactive power compensation control method, topological structure of dynamic reactive power compensation device, and implementation of the dynamic reactive power compensation control method.
Research on Modeling and Simulation Technology for Wind Power Generator in Power System: A Survey
Authors: Su Yin Sheng , Zeng Yuan , Li Peng , Li Zhi Huan
Published: August 2014

Features of different kinds of wind power generators worldwide are firstly overviewed. Then the latest development trend and research progress of modeling and simulation for wind power generator are analyzed and compared. Finally, the developing directions of the modeling and simulation technology for wind power generator are presented, hoping to offer study idea and reference for deeply researches.
The Application of GPU in the Acquisition Algorithm of Spread Spectrum Signal Based on Cycle-Related
Authors: Liu Yang , Fu Gang , Zhu Dong Xu
Published: August 2014

For spreading capture large computation and computational problems of slow, capture method is proposed based on GPU acceleration, the conversion cycle-related acquisition algorithm based on CUDA thread blocks for the implementation of the process, so spreading the capture process is completely in the GPU to accelerate implementation, achieve better results in the calculation, while significantly improving the computational speed of operation. Experimental results show that GPU-based capture method effectively improve the efficiency of the system, compared to CPU operation speed is increased by about 42 times.
Parametric Design of Crankshaft Based on CATIA Secondary Development Platform
Authors: Yang Hong Gang , Wang Shu Jie , Xie Yi Rong
Published: August 2014

Parametric design method of crankshaft is investigated in this study, based on the application of VB environment and CATIA secondary development of automation technology. Using the shape design parameters, the crankshaft can be established parametrically. The research results show that the proposed method can quickly generate crank shape, thus the repetitive operations can be decreased, and the costs can be saved.
A New Design of Dual-Channel Wave Energy Power Device
Authors: Huang Chun Yi
Published: August 2014

Ocean energy is a precious pearl. However, in the exploitation of the sea of people, the available development of ocean wave energy method is too simple and the structure of the device is relatively complex. This paper examines the analysis for the direction of the waves along the coast, and designed a dual-channel ocean wave energy generation device as well as having made a detailed description of its structure and concrete working principle. The ingenious engineering design of the device can continuously generate electricity. As the waves of high and low tides will produce mechanical energy to drive the rotation of the impeller, the improved design in this paper make full use of this principle so that can produce a steady stream of electricity. Due to the inherent advantages of this device, it has great room for improvement and broad application prospects.
Design of High Speed Laser Modulation Circuit Based on ADN2841
Authors: Tang Yan Feng , Li Hong Zuo , Yang Bo
Published: August 2014

This paper introduces the working principle of ADN2841 and analyzes the main features and the typical application circuit of ADN2841. The laser communication transmission modulation circuit design for the 14 foot butterfly package directly modulated lasers is proposed, and according to the realization and debugging, we summarize the ADN2841 application experience and pay attention to the problem.
The Design of Strain Acquisition System Based on the Wireless Sensor Network
Authors: Wang Wei Zheng , Dai Ya Wen , Sun Yang , Ding Chen , Li Peng , Shen Jia Wei
Published: August 2014

The traditional strain acquisition system transmits the signal by wire, but the signal attenuation would happen when the wire is long, and the line maintenance would cost a lot of manpower and money. This paper has designed a high speed strain acquisition which could transmit data through the wireless sensor network, this solution we provided has overcame the signal attenuation, and comparing the cost of the systems is lower. It is proved by the experiment that this solution can ensure the signal’s accuracy and complete the normal strain acquisition.
Prediction Based on PSO-SVM in Power Communication Network Traffic
Authors: Zhao Zhen Dong , Xiao Rui Ju , Pei Meng Meng , Zhou Yi
Published: August 2014

Power communication network traffic prediction is important basis of safely assigning and economically running. The forecasting precision will directly affect the reliability, economy running and supplying power quality of power system. Paper first expounds the electric power communication network traffic prediction research present situation, summarized the characteristics of the forecast and the influencing factors, summarizes the commonly used method, is put forward to the return of the electric power communication network traffic based on libsvm prediction method, and the PSO (particle swarm optimization) algorithm is adopted to model parameters optimization, with the test set error as the decision, based on the optimization of model parameters, choice, makes the prediction precision is improved.
The Nature and Design of No Quick Return Peculiarity of Crank Rocker Mechanism
Authors: Ma Xuan , Gao Yun Fang
Published: August 2014

In this paper, the condition of no quick return peculiarity of crank rocker mechanism is analyzed fist, then the character and design of this mechanism is analyzed. Especially, we developed the methods of smaller quick return’s crank rocker mechanism’s design, and lay the theoretical foundation for the mechanism’s design and application.
The Profile Analysis of Wheels and Rails of Different Wear Stages for Heavy-Haul Wagons
Authors: Zhang Tie , Zhang Jun , Sun Chuan Xi
Published: August 2014

A large number of wheel and rail profiles of different wear stages are tracked and measured using the wheel/rail profile admeasuring apparatus for DaTong-QinHuangdao heavy-haul line. The finite element method (FEM) models and dynamic models of the contact between wheels and rails are both established for two working conditions (i.e., straight line and curve line). In addition, the corresponding parameters and indexes are obtained through the simulation and calculation. The results show that the maximum equivalent stress for the wheel profile of type II is lower than those of wheel profiles in other stages for the straight and curve lines. Its contact stress distribution is more uniform than others. The dynamics indexes including stationarity and stability of the standard wheel profiles ( i.e. LM) are the best. The indexes are gradually reduced along with the abrasion of wheel profiles. When passing the curve, the dynamics indexes of wheel profiles in each stage are reached the evaluation standard. The abrasion rate of wheels and rails can be reduced relatively when wheels are matched with the worn rails in the stable stage.
Impulse GPR Echo Parallel Acquisition System Design Based on FPGA
Authors: Jia Liang , Ma Xing , Sun Wei
Published: August 2014

On the basis of the characteristics of the shock pulse GPR echo signal and by using the principle of clock distribution control parallel data acquisition, we realize the high-speed data acquisition with low-speed parallel ADC device. The system consists of part of the signal input module, signal conditioning module, clock distribution module, data acquisition module and FPGA control module. The design with Simple circuit, level of clarity and good stability. It has practical significance and provides some reference to designers of other high-speed A/D conversion.
The Research of Transmission Line Power Losses Increasing Caused by Harmonics
Authors: Pang Yan Jun , Liu Bo , Wang Yi , Liu Ji Yong , Wang Xue , Wang Lei , Zhang Xiao Shu , Tong Rui , Zhao Xin Hua
Published: August 2014

The area within the safe supply 66kV substation south chapter of the party , with a line of 10kV line loss Wulong missing instance , describes this line loss increase was mainly caused by two reasons : first, harmonic wave current in the transformer windings ( or line conductors ) flows generated power loss; second winding ( or line wires ) makes the skin effect resistance below the fundamental harmonic resistance, causing the windings ( or line conductors ) of additional losses increase large. By the principle of induction and measurement of electronic energy meter , demonstration will not produce harmonics electronic energy meter error affected and have some impact on the accuracy of the induction meter , but not serious, can demonstrate the harmonic increase in line losses .
Attitude Determination by Integration of Multi-Sensors Based on Federated Kalman Filter
Authors: Lai Tao , Wang Guang Long , Zhu Wen Jie , Gao Feng Qi
Published: August 2014

Micro inertial measurement unit integration storage test system is a typical multi-sensor information fusion system consists of microsensors. The Federated Kalman filter is applied to micro inertial measurement unit integration storage test system. The general structure and characteristics of Federated Kalman filter is expounded. The four-order Runge-Kutta method based on quaternion differential equation was used to dispose the output angular rate data from gyroscope, and the recurrence expressions was established too. The control system based ARM Cortex-M4 master-slave structure is adopted in this paper. The result shown that the dimensionality reduced algorithm significantly reduces implementation complexity of the method and the amount computation. The filtering effect and real-time performance have much increased than traditionally method.
Research on Optimal Application of SVG in Substation Regulated Voltage
Authors: Wang Ying Nan , Han Feng Li , Ren Zhe , Jin Peng , Li Hai Sheng , Wang Shu Han , Wu Si Cong
Published: August 2014

In order to solve the problem of low voltage at a terminal rural power grid 66kV substation, a 5000-kilovar SVG is arranged in the substation to elevate and stabilize the 10kV bus voltage. Since put into operation, SVG runs well, solving the problem of low voltage while lowering the loss of the entire line. However, in some cases, people find that while stabilizing the bus voltage, SVG causes voltage drop in adjacent substation, and act of the intelligent capacitor unit in the adjacent substation, thus leading to opposite reactive response of SVG, affecting voltage stabilization of the two substations and adding up to equipment loss. This paper analyzes this phenomenon and has proposed an approach of correction.
Simulation Study of the Array Antenna
Authors: Wu Gang , Tang Yu
Published: August 2014

In this paper, after introducing the concept of far zone field, expression of the electric and magnetic field intensities of symmetrical center-fed dipole is derived based on structure of the array antenna by the electric field intensity formula of symmetrical center-fed dipole. When the electric field intensity of the array antenna is known, the direction function of the array antenna is obtained by concept of the primary pattern and array pattern , Finally, computer programming simulation is used to realize the visualization of the direction function of the primary pattern and array pattern. . In this way, the accurate data and precise curve are obtained so the goal of direct-viewing analysis of the problems is achieved.