bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of the Wireless Data Acquisition System for Experimental Rabbit Rectal Temperature Based on Bluetooth and ARM Technologies
Authors: Wang Ming Wei , Li Qin Jun , Li Qiang Hua , Guo Wen Qiang
Published: June 2014

In drug trials, the rabbit rectal temperature change is an important data to determine the efficacy and allergy of drugs. The wireless acquisition system for experimental rabbit’s rectal temperature has abandoned the traditional wired measurement mode, not only effectively improves the data acquisition efficiency and accuracy, but also reduces the pain degree of experimental rabbits. This paper mainly describes the hardware design of the new designed system including sensor nodes, Bluetooth transmission network and center node of the system based on Bluetooth and ARM technologies. The corresponding software design of the system is also concerned.
Design of Wireless Communication System Based on nRF24L01
Authors: Jiang Xin Rui , Lv Yi Ming , Cheng Xiao Han
Published: June 2014

In recent years, wireless communication plays an important role in many fields. This paper put forward a design of wireless transmission system based on nRF24L01 chip and STC89C52RC. It can realize a multi-point measurement, such as temperature, liquid level and displacement measurement at a high rate and low cost. It reduces current consumption and data collisions. More functions are to be added to the system in further experiments.
Confidence Based Hierarchical Online Ensemble Visual Tracking
Authors: He Wen Hua , Liu Zhi Jing , Qu Jian Ming
Published: June 2014

In order to adapt to the target appearance changes during visual tracking, feature model needs to be updated by online learning. However, online adaptive methods suffer from the drifting problem: error data are used for updating and will finally lead to tracking failure. In this paper, we propose a novel hierarchical online ensemble tracking method. Optical flow tracker is employed to predict the rough location. Online learning classifier is employed to detect the target. Template match is used to filter the data for updating. All these parts are combined together hierarchically by their confidence to ensure the stability of online learning and tracking. In contrast to the individual online learning and semi-supervised online learning, our method show more adaptability and stability. We demonstrate the performance on several public video sequences, which shows the improvement of our method over other online tracking approaches.
A New Measurement System of Yarn Appearance Based on Machine Vision
Authors: Li Jun Juan , Wang Chen , Tu Wen Xiao , Zuo Bao Qi
Published: June 2014

In this paper, a new yarn appearance measurement system based on machine vision is introduced. The yarn images are continuously captured by image acquisition system. To extract the main body of the yarn accurately, the yarn images are processed sequentially with threshold segmentation and morphological opening operation. Then the coefficient of variation (CV value) of diameter is calculated to characterize the yarn evenness. The measurement process achieves result (CV value) which can be compared with USTER evenness tester by image processing techniques. By comparing different methods which use different algorithms, a suitable method is chosen to be used in this new measurement system. Then a more accurate, more efficient and faster measurement system will meet requirements in the future.
Multiple Objects Tracking Based on Mixture Features
Authors: Li Dong Mei , Li Tao
Published: June 2014

For multiple objects tracking in complex scenes, this paper proposes a new tracking algorithm for multiple moving objects. The algorithm makes likelihood calculation by using new DG_CENTRIST feature and color feature, and then calculates the overlapping ratio of the tracking object and the object in the current frame using coincidence degree to measure the occlusion. The algorithm has good robustness and stability, and the experiment results show that this method can effectively improve the accuracy of the multiple target tracking.
Finite Element Analysis of Hydraulic Clipping Machine Shear Platform Dased on ANSYS
Authors: Wang Hai Lin , Sun Yi Hua , Li Ming Bo , Lin Gao , Feng Yun Qi , Wu Shi Li , Huang Cai Hua , Chen Jian
Published: June 2014

Q43Y-85D type crocodile hydraulic clipping machine was taken as research object to optimization design. A finite element model for clipping machine was built using shell unit as fundamental unit. ANSYS12.0 finite element method was used to analyze the deformation and stress distribution of the shear platform model of hydraulic clipping machine. The result showed that the maximum equivalent stress at the dangerous area was 368.162 MPa and the maximum elastic strain was 0.1814×10-2 mm. After the structural optimization design, it was found that the maximum equivalent stress decreased to 186.238 MPa which did not exceed the material’s yield limitation 215 MPa and the maximum elastic strain decreased to 0.919×10-3 mm which satisfied the requirement of stiffness.
A Manhole Covers Intelligent Monitoring Terminal Based on Dual Frequency RFID and Acceleration Sensor
Authors: Wang Zhan Bin , Wang Jing Cheng , Zhang Hai Bo
Published: June 2014

For management the manhole cover effectively, the manhole covers intelligent monitoring terminal (MCIMT) based on dual frequency RFID and acceleration sensor was proposed in this paper. Through hardware designing, alarm algorithm designing, program debugging and packaging, we developed the MCIMT. The key performance testing and demonstration system operation shown the following results. Firstly, the MCIMT communication distance can achieve 800 meters under the open conditions and 300 meters under the occluded environment reliably. Secondly, the MCIMT embedded special state estimate algorithm can output the correct scene sate of manhole cover. Thirdly, the MCIMT could operation 3 years in manhole cover. Lastly, the demonstration system based on the MCIMT can alarm accurately and timely.
Inverse Hysteresis Compensation of One-Dimensional Piezoelectric Scanner with Generalized Prandtl-Ishlinskii Model
Authors: Luo Dong , Chen Si Hai , Chen Wei , Jiao Guo Hua , Lu Yuan Fu
Published: June 2014

Laser scanner is one of the key components in laser radar, adaptive optics, space optical communications and other fields, which can achieve precise control of the laser beam deflection or scanning. Due to the high precision, high bandwidth and small momentum of inertia, piezoelectric scanner has been widely developed in recent years. It’s necessary to design hysteresis compensation algorithm because the hysteresis effect of piezoelectric ceramics will affect the scanning accuracy of one-dimensional piezoelectric scanner. In the paper, we firstly establish an inverse hysteresis model based on the generalized Prandtl-Ishlinskii model which describes properties of the piezoelectric ceramic, then use particle swarm algorithm to identify the parameters of inverse hysteresis model, obtaining a triangular wave signal with inverse hysteresis to drive one-dimensional piezoelectric scanner. Experimental results show that the scanning nonlinearity is improved from 3.5% to less than 1% after driven by triangular wave votlage within 50Hz, the scanning accuracy of one-dimensional piezoelectric scanner is improved effectively.
The Numerical Simulation of the Lateral Inhomogeneous Deformation of the Permafrost Subgrade
Authors: Fan Yu Shuo , Mao Xue Song , Meng Qing Meng , Luo Bin Bin
Published: June 2014

The Qinghai-Tibet highway subgrade inhomogeneous deformation is very serious because of the bad climate environment and the special engineering condition of permafrost. To reveal the mechanism of subgrade diseases, based on the theory of elastic-plastic deformation, the control equation of the stress and deformation field of the subgrade is established. We analyze subgrade stress and deformation field by finite element software. Considering effect of the southern and northern slopes, the model of the inhomogeneous deformation of the subgrade was established. Then we calculated the variation characteristic of the lateral inhomogeneous deformation under different melting depth. The results showed that the melting interlayer, melting depth and the effect of southern and northern slopes were the key factors influencing the permafrost subgrade lateral inhomogeneous deformation.
Moving Defect Localization of Wheel-Bearings with Particle Filter and MUSIC
Authors: Zhang Si Jie , Chen Bin , Gao Bao Cheng , Zhou Yuan
Published: June 2014

To solve the problem of moving defect localization for wheel-bearings, a novel algorithm based on particle filter and multiple signal classification (MUSIC) is proposed in this paper. It introduces two-dimensional circular sensor array to measure acoustic signals of defective bearings. By through of MUSIC, the direction-of-arrivals (DOAs) of defective signal are firstly estimated. After the motion trajectory was calculated by particle filter and DOAs, the defect was located by reference sound source. The experimental results show that the radius and phase errors of proposed method are less than 2mm and 5 degrees.
Principle Experimental Study about Collapsible Fuel Tank Based on Quality Measurement Method
Authors: Liu Nan , Wang Jian Chao , Yang Jian Xiong , Liu Tian Min
Published: June 2014

This paper presents the method for quality measurement method about collapsible fuel tank, and mathematical model about the quality of the fluid inside collapsible fuel tank is set up. Comparing the calculate results and principle experimental obtained results, the method of quality measurement is validated. The method is characterized in simple and high measurement precision, which can be extended to apply in measuring the quality of liquid of large-scale irregularly shaped or collapsible fuel tank.
The Virtual Assembly Simulation and Optimization Design on Single Screw Pump of Offshore Petroleum Well Cementing LADS Device
Authors: Wang Zhan Xu
Published: June 2014

The single screw mathematical model is established based on dynamics analysis, and the numerical simulation and optimization design is analyzed. Through the virtual assembly simulation and digital assembly experiments on the single screw, to obtain the compatibility of the improved single screw structure. Thereby, the matching and assembly interference of model design is tested, to optimize the improved single screw compatibility between the stator and rotor, and the device is achieved a dynamic interactive digital assembly in virtual reality environments.
Research on Coplanar Capacitive Sensor Design for Film Thickness Measurement
Authors: Gong Yu , Zhu Hai Ye , Li Nan
Published: June 2014

Coplanar capacitive sensors have been widely applied in many fields with its characterstics of non-invasion, lowcost and fast response. A complex structure of coplanar capacitive sensor is designed to be used for the film thickness measurement. Firstly, three types of coplanar capacitive sensors with different shapes are designed, and according to the experimental reuslts, the parameters affecting the sensor signal strength and sensitivities are discussed, the electric field distributions of sensors are simulated by COMSOL.Then the fringe capacitance of a series of spiral-type sensors are measured and analyzed. The experimental results indicate the rational geometrical parameter design about the coplanar capacitive sensor can improve the sensor performance obviously.
Hydraulic Excavator Bucket Teeth Load-Time Courses Measurement
Authors: Hu Xiao Li , Yan Wei , Xiang Qin , Xie Yu Ting
Published: June 2014

Based on the bucket teeth load-time courses calculation model under bucket digging condition, the stresses on the hydraulic cylinder piston rods of boom and bucket and the real-time length of bucket hydraulic cylinder were set as measured variables, and a measuring method of the bucket teeth load-time courses was developed which had the advantages of less measuring points, simplified measurement process and low cost. The bucket teeth load-time courses were calculated by inputting the measuring data into the self-developed Constructing Hydraulic Excavators Load Spectrum software, and its characteristics of each digging step in one excavation cycle at digging macadam were analyzed. Then, using rain-flow counting module in FE-SAFE software, the statistical graphs of bucket teeth load-time courses were acquired which could provide the basis for hydraulic excavator reliability design and fatigue life prediction.
The Proof of Equivalence between "Moment of Inertia Based Method" and "PCA Based Method" in LOS Detection
Authors: Hong Liang
Published: June 2014

It is proved that in LOS detection,"moment of inertia based method" and "PCA based method" are in fact equivalent. Then the method is abstractly redefined as "distance variance extremum based method".
Compare with the Identifying Tape Image of Longitudinal Tear in Average Filtering and Median Filtering
Authors: Zhang Ming Min , Li Peng Hui
Published: June 2014

For conveyor belt vertical tear fault, in order to shoot image the high speed camera of gigabit network which used in industry is used in this paper. And every frame image is transferred to PC, whether the image tear in the PC will be identified. Compare with the identifying tape image which is transferred to the PC of longitudinal tear in average filtering and median filtering is studied in this paper, to obtain the best way to detecting tear, and using C# language which is under Visual Studio to write image collection, processing, time-frequency transformation and recognition programs.
Design and Implementation of a Kind of Ship Underwater Electric Field Signal Collection Equipment Hardware
Authors: Wang Xiao Bei , Xia Li , Wang Xiang Jun , Liu Yi
Published: June 2014

Based on the characteristics that ship underwater electric signal is waek, a kind of ship underwater electric signal acquisition equipment of hardware structure is designed. With instrumentation amplifier of high-precision and low noise and low pass filter module, the electric field signal collected by three dimension sensor is filtered and amplified. It ensures the integrity and validity of acquisition signal.
Study on Resolution Capability of Beam Space MUSIC Estimation Algorithm
Authors: Zhou Hao , Huo Zhi Jie
Published: June 2014

Hydrophone arrays are generally used in modern sonar systems in which beam forming plays an important role. This paper analyzes the beam space MUSIC (multiple signal classification) algorithm for the weakly correlated sources according to changes in the statistical properties of signal and noise, then estimates the azimuth of multi-sources using array element space MUSIC algorithm and beam space MUSIC algorithm accurately, respectively. Finally, problems such as the computation cost of the algorithms, SNR resolution threshold and estimation deviation are discussed based on simulation tests. A conclusion could be drawn that beam space MUSIC algorithm is an effective way to resolve multiple targets in small angle domain.
An Comprehensive Automatic Monitor under the Conditions of Deepwater Environment
Authors: Shi Yun , Zhao Xue Liang , Li Kang , Wei Guang Hua
Published: June 2014

pH value, temperature and pressure are very important parameters in understanding the subsurface distribution and leakage in the geological storage of carbon dioxide. the in-suit access technology of pH value, temperature and pressure for deepwater environment have been a common concern in the field. In the article the hardware and software design of Comprehensive automatic monitor including is described based on MSP430 in detail. The experiment results show that it can be used in the deepwater environment to monitor the pH value, temperature and pressure in-suit with the advantages of high reliability, low power consumption, long-distance transmission, anti pressure, multi-node, anti temperature and so on.
Compared of Polarity Correlation Algorithm and LMS Algorithm for Flow Velocity Measurement
Authors: Yan Peng Cheng , Zhou Meng Ran , Ma Yun Chuan
Published: June 2014

This paper summarizes the basic principle of flow velocity measurement, analysis of the structure of the polarity correlation algorithm, the circuit implementation, and the peak point determination, then introduced the LMS(Least mean square) algorithm in flow velocity measurement , thereafter,the simulation experiment of the two algorithms are performed. Experimental results show that with a noisy environment, the measurement accuracy of the polarity correlation algorithm reduced, since the LMS algorithm can automatically adjust its parameters to the external factors, so it can still have a accurate date in flow velocity measurement.
Development of New Smart Meter with Optimized Power Line Communication Module
Authors: Gong Mao Fa , Liu Bing Qian , Wang Wen Shuo , Lin Yu Qing , Ge Hui Ting , Yang Ning Xia , Qiu Feng
Published: June 2014

A smart meter was designed with power line communication (PLC) function. We designed the optimized power carrier module by adding a switching circuit that controlled by a microcontroller in coupling circuit on the basis of common design. Improved its communication efficiency and reduced energy consumption. Energy metering module used C8051F360 microcontroller as the main control chip and used high accurate metering chip ATT7022B to collect electronic signal. We designed a multifunctional and easy-to-use intelligent man-machine interface by using Beijing DWIN Company’s industrial serial LCD touch screen.
Signal Measurement Error Analysis of the Bayesian Network of Mechanical Fault Detection
Authors: Zhang Yun Xia , Lan Ling , Wang Xiao Hui
Published: June 2014

Based on measurement error of observation nodes is commom in mechanical system fault detection, but the traditional denoising method has many shortcomings. This paper introduce the Gibbs sampling method, which can be used to denoise and eliminate measurement error for node discreted information. We discuss it, and expect some promotion in practical application.
The Research of Judging the Phenomenon of Roof Separation Based on Principle of Dynamic Time Warping Algorithm
Authors: Liu Dan Dan , Qiu Guang Cai , Che Hua Long
Published: June 2014

Applying Wall tapping and roof sounding for coal blasting mining, excavation face to determine whether the status of roadway roof separation occurs. Firstly through beating the different parts of rock layers and record the received voice signal, which do the DTW feature extraction of the voice signal. Secondly based on the model database of constructed roof separated layer, determining the state of the roof combining with BP neural network recognition algorithm, after the extraction of DTW feature and the sequence data generated. Finally simulation and experiments show that identification method based on DTW, determining the state of the roof characteristic. Whether the roof separation of roadway occurs, to avoid the misjudgment problems of lack of experience in practical works.
Effect of Spontaneous Radiation of Vertical-Cavity Semiconductor Optical Amplifier Bistability
Authors: Zhou Li
Published: June 2014

Includes the establishment of the spontaneous radiation of vertical cavity semiconductor optical amplifier (VCSOA) bistable model, numerical analysis and comparison of VCSOA and traditional SOA bistable characteristics of amplified spontaneous emission (ASE) sensitivity.
PC Transceiver Programming in GPRS Wireless Transmission Module
Authors: Kuang Xing Hong , Yao Zhe Yi , Wang Zhi Yu , Zhou Jia Min , Li Jing , Hu Juan , Wang Shi Ming
Published: June 2014

Based on UDP protocol in Visual Basic Winsock control, this paper designed third-party software to send and receive data. Wireless data transmission module used CM3160EP module. In order to decrease wireless data loss rate, four kinds of packets format is designed. The results show the stable data transmission and verify the send-receive and display of hexadecimal data on server-side.
An Implementation of Wide-Range Digital Delay Locked Loop
Authors: Zhou Duo , Zhang Jin Yi , Ye Bo
Published: June 2014

This paper presents an all digital delay-locked loop (DLL) to achieve wide range operation, fast lock and process immunity. To keep track of any potential phase problem caused by environmental variations, a delay compensation mechanism is employed. Utilizing the delay compensation controller (DCC), the proposed DLL can overcome the false-lock problem in conventional designs. It is fast locking because the DLL’s initial state can be detected by the delay compensation controller and the initial large phase difference can be eliminated. The proposed DLL is implemented in a 0.13μm CMOS process. The experimental result shows that the chip could work in a wide frequency range from 10 MHz to 1 GHz, with less than 20 cycles lock-in time, 10-ps delay resolution, and 6.4 mW at 1 GHz power dissipation.
Frequency-Hopping Communication Technology Based on Self-Adaptive MIMO-OFDM System
Authors: Ruan Jin Xin , Xu Yan , Cui Miao
Published: June 2014

Along with the gradual increase of intelligent and information equipment on the battlefield, the fierce electronic warfare between the enemy and us makes the electromagnetic environment of the battlefield more and more severe. The anti-jamming capability of conventional frequency-hopping communication system is inadequate such as anti-dynamic interference, anti-intercept, etc., thus posing a serious threat to normal military communication. Moreover, currently the data transmission rate of frequency-hopping system is fairly lower, and cannot meet the increasing large-capacity real-time data transmission requirements. This article deeply researches self-adaptive MIMO-OFDM technology and frequency-hopping communication technology, and introduces the research on frequency-hopping communication technology based on self-adaptive MIMO-OFDM system. The research shows that self-adaptive MIMO-OFDM-based technology can effectively enhance the frequency-hopping communication system’s anti-jamming and anti-intercepting capability, and improve the data transmission rate.
LabVIEW-Based Intelligent Digital Voltmeter Design
Authors: Gao Feng , Liu Liang Fei , Zhao Hong Wei
Published: June 2014

This article describes the SCM combined with A/D converter and wireless digital transmission module which is used for building a DC voltage measurement system based on LabVIEW. The system uses AT89C52 as controller, ICL7135 as precision, double integral A/D converter circuit as voltage data collection, PTR2000 as a wireless transmission module and the LCD display module as the measured voltage. The collected data can be transmitted to a PC. The hardware system design of the DC digital voltmeter is introduced exhaustively. It also gives some details of the hardware circuit design.
Research on Neural Network Control Technology for Satellite-Based Laser Communication Tracking Turntable
Authors: Wang Li Hua , Wu Xiao Qiang
Published: June 2014

In space laser communication tracking turntable work environment characteristics, we design a neural network PID control system which makes the system’s parameter self-tuning. The control system cans self-tune parameters under the changes of the object’ mathematic model, it solves the problem for the control object’s model changes under the space environment. It also looks for method for optimum control through the function of neural network's self-learning in order to solve the problem of the precision’s decline which arouse from vibration and disturbance. The simulation experiments confirmed the self-learning ability of neural network, and described the neural PID controller dynamic performance is superior to the classical PID controller through the output characteristic curves contrast.
Attacking a Measurement Device Independent Practical Quantum-Key-Distribution System with Wavelength-Dependent Beam-Splitter and Multi-Wavelength Sources
Authors: Yu Tao , An Hui Yao , Liu Dun Wei
Published: June 2014

It is known that practical quantum key distribution system, because of the imperfect of devices, has sort of loopholes, so Eve can attack through these loopholes. The proposition of measurement device independent quantum key distribution protocol claimed to solve all the loopholes at the detector side. However the proof of MDI-QKD is based on the Hong-Ou-Mandel effect at 50:50 beam splitter. And with current experimental technology, a realistic beam splitter, made by fused biconical technology, has a wavelength-dependent property. Based on this fatal security loophole, the author propose a wavelength-dependent attacking protocol, which can be applied to practical MDI-QKD systems. Through this attacking protocol the author theoretical estimated that the eavesdropper could get 70% of the encoding information with a QBER of only 0.04.
Design and Realization of Infrared Simulation of SPI Communication
Authors: Zhou Dao Xian , Zhang Cui Xia , Liu Li Li , Han Shuo
Published: June 2014

The Infrared transfer using data transport protocol plus sign, plus software validation for data transmission, is usually transfer technology. This article provides an overview of the design of hardware circuit simulation of infrared transmission of SPI protocol, and details about the process of transmitting and the receiving program and how it works, and points out some problems which need paying more attention in the design process.
Network Control of Disaster Recovery Plan
Authors: Liu Qiang , Yu Miao , Jia Hong Li , Chen Pan Jie
Published: June 2014

DRP is considered as a business function for the continuity of business, which can be used to build a suitable IT infrastructure. Using DRP, a company's data is easily secured, maintained or resumed. Therefore, this article provides an overview of DRP and performs it for an organization with three branches.
Pilots Precoding Scheme for Massive MIMO System
Authors: Zhang Hong , Hao Dong Lai , Liu Xiang Yang
Published: June 2014

There is difficult to acquire channel state information in massive MU-MIMO system. A downlink pilots precoding scheme I s proposed for efficient channel estimation. With the scheme, the BS precodes the pilot sequences and forwards to all users. The channel estimation overhead of this scheme does not depend on the number of BS antennas, and is only proportional to the number of users. We then derive several precoding techniques which enables us to implement the proposed scheme. Finally in simulation the proposed algorithm is compared with conventional algorithms without precoding training in spectral efficiency. The simulation results show that the proposed scheme performs better than the existing schemes.
A Spectrum Sensing Based on Support Vector Machine Algorithm in the Building Indoors Environment
Authors: Xia Xing Hua , Luan Fang Jun , Li Meng Xin
Published: June 2014

Spectrum sensing performance of building indoor environment has been the focus of attention and research in low signal-to-noise ratio. In this paper, a primary users sensing approach to signal classification combining spectral correlation analysis and support vector machine (SVM) is introduced. Three spectral coherence characteristic parameters are chosen via spectral correlation analysis. By utilizing a nonlinear SVM, primary user signal has been detected. Simulations indicate that the overall success rate is above 90.2% when SNR is equal to-5dB and 80.1% in-15dB. Compared to the existing methods including the classifiers based on MME and ANN, the proposed approach is more effective in the case of low SNR and limited training numbers. The results show that the validity and superiority of the proposed algorithm in building indoor environment.
The New Research of Spectrum Sensing Technology for Cognitive Radio
Authors: Peng Yi , Wang Yan Jun
Published: June 2014

With the rapid development of wireless communication technology, the shortage of spectrum resources is becoming more and more serious, and may even become a bottleneck restricting of the development wireless communication technology in the future. Now, Spectrum sensing technology, spectrum sharing technology and spectrum management technology is the three core technologies of cognitive radio spectrum,and sensing technology is to implement the follow-up of spectrum sharing and the premise of spectrum management.So mainly to the current model of the cognitive radio spectrum sensing technology,to make a classification and comparison, finally it is concluded that cognitive users under the environment of higher signal-to-noise ratio, the better results of the perceived performance.
Optimization Design of Oil-Water Separator Based on Fuzzy Synthetic Evaluation
Authors: Zhang Yin Dong , Liu Yang
Published: June 2014

The method of Fuzzy Synthetic Evaluation is presented to optimize oil-water separator design in the paper. Firstly, the key design parameters to be optimized are determined. Secondly, the CAD technology is applied to achieve parametric models of separator and the CFD technology is employed to fulfill fluid simulation of separator parametric models. Then, with the evaluation indexes established, the simulation results of each separator parametric model are evaluated by Fuzzy Synthetic Evaluation. Finally, by comparing the evaluation value of every parametric model, the optimal design model of oil-water separator is achieved.
A Precoding Algorithm Based on Truncated Polynomial Expansion for Massive MIMO System
Authors: Zhang Hong , Hao Dong Lai , Liu Xiang Yang
Published: June 2014

A precoding algorithm based on the truncated polynomial expansion is proposed for massive multiple-input multiple-output system, Using the random matrix theory, the optimal precoding weights coefficient is derived for tradeoff between system throughput and precoding complexity. Finally, under different channel conditions, the simulation results show that the average achievable rate will increase infinitely approaches the regularized zero forcing precoding and has better performance than TPE scheme without optimization..
The Application of an Improved Genetic Algorithm to Signal Acquisition
Authors: Shi Min , Tian Cong Cong , Yi Qing Ming , Li Song
Published: June 2014

The paper proposes an improved genetic algorithm which is applied to the problem of GPS signal acquisition.The improved genetic algorithm uses the small section method of the initial population, dynamic search range of parameter, and the adaptive crossover probability and mutation probability to search GPS signal parameters. Simulations and experiment results show that the improved genetic algorithm can search the signal parameters rapidly and precisely. The GPS signal acquisition performance is improved.
The Application of Sliding Mode Control in Current Source Converter
Authors: Bai Jing , Lu Shi Qi , Liu Jian
Published: June 2014

Current source converter is a variable structure system due to its switching nature, so that it can easily cause the output current waveform distortion and can not be accurately track the reference current. To solve the above problems, this paper proposes a new variable structure control strategy with fan-shaped sliding domain in the current source converter control system. In the control strategy, the paper deduces the switching surface and switching control law of SMVSC, and calculates the sliding existence domain based on the mathematical model of current source converter. Finally, the simulation results show that the control scheme can make current source converter have better output current waveform, fast tracking the reference current, and strong anti-interference ability. Therefore, the control scheme is correct, effective and feasible.
Simulation Analysis of Adjustable Movable Blade Axial Flow Fan
Authors: Zhu Ai Hua
Published: June 2014

This paper focuses on the study on the installation angle of the adjustable movable blade axial flow fan.At first, the airfoil and the corresponding series of fan is selected, and detailed calculation of the blade section is performed to obtain the chord length and the thickness of the fan airfoil at different circumferential surfaces, as well as the coordinate value of each section. Then, a three-dimensional solid modeling of the fan with different installation angles in Pro/E is used for mesh generation and boundary conditions arrangement in Gambit. Finally, an analogue simulation is carried out in fluent to analyze the velocity of the blade, the backpressure and turbulence generated by the airflow on the blade.
Node Capture Attack Detection in Dynamic WSNs Based on New Node Tracking
Authors: Lu Peng , Zhang Guang Wei , Yang Fang Chun
Published: June 2014

Since the nodes of WSNs are always deployed on the outside, nodes are easy to be captured. The traditional detection approaches of capture attack can be categorized as approaches based on time of absence and approaches based on target tracking. The former only suitable in static WSNs and the latter usually requires a large communication cost. In this paper, a novel node capture attack detection approach is proposed in dynamic WSNs. Through this approach, every node record its neighbors and detect new nodes in real-time, if new nodes join in the network, a new node tracking algorithm is performed in WSNs and find out which of them are captured by adversaries. Simulation results show that, this method can greatly improve the detection accuracy in dynamic WSNs, and the communication cost is low.
Study on WSN Localization Algorithm and Simulation Model Based on Kalman Filtering Algorithm
Authors: Gao Lian Zhou
Published: June 2014

This paper studies on the algorithm to improve the location of Wireless Sensor Network (WSN) in Intelligent Transportation System (ITS). Considering multi-path effect in the localization, an improved RSSI algorithm is introduced in the localization algorithm. The localization results are analyzed under different density of beacon nodes, and Kalman filtering algorithm is introduced to reduce the influence of signal noise. Finally, to test the algorithm based on Kalman filtering algorithm, a simulation model of ITS is developed, which is used to simulate the localization of real vehicles. The simulation shows the algorithm has effect to improve location accuracy and to application.
Research of an Improved Double-Array Trie Tree Algorithm
Authors: Yang Wen Chuan , Jia Bei , Qu Qing Yi
Published: June 2014

This paper presents an improved algorithm-iDAT, which is based on Double-Array Trie Tree for Chinese Word Segmentation Dictionary. Chinese word segmentation dictionary based on the Double-Array Trie Tree has higher efficiency of search, but the dynamic insertion will consume a lot of time. After initialization the original dictionary. We implement a Hash process to the empty sequence index values for base array. The final Hash table stores the sum of the empty sequence before the current empty sequence. This algorithm adopt Sunday jumps algorithm of Single Pattern Matching. With slightly and reasonable space cost increasing, iDAT reduces the average time complexity of the dynamic insertion process in Trie Tree. Practical results shows it has a good operation performance.
Structural Expert Modeling of Buildings on the Basis of Mamdani's Algorithm
Authors: Soldatenko Tamara
Published: June 2014

Known methods of definition of sources of damages of bearing designs not fully consider possibilities of expert estimates of results of their inspection. In these methods forecasting of the reasons of defects of bearing designs in future intervals of time isn't provided. Relevance of offered approach consists in expansion of the tasks solved at research of a condition of bearing designs and use of algorithm of Mamdani at creation of effective procedures of work with indistinct knowledge bases about the reasons of defects. The purpose of work is decrease in level of uncertainty at expert diagnosing and forecasting of defects of bearing designs of buildings. The objectives are achieved by use of the device of fuzzy logic in the joint analysis of expert aprioristic information and results of the current tool control of a condition of bearing designs of buildings. It is offered to estimate possibility of detection of defects of certain types at future intervals of time by means of the indistinct conclusions received at use of algorithm of Mamdani and developed on his basis of settlement procedures. The offered approach took place settlement approbation in relation to logical processing of indistinct information on emergence and development in time of cracks of bearing designs and has shown the working capacity. On the basis of these results conclusions are drawn on area and conditions of application of the developed models and settlement procedures.
Based on SVM Classification of Connection Pools Algorithm
Authors: Zhao Juan , Xiong Hui Yun
Published: June 2014

The connection pool technology has become a deal with large amount of data requested a solution that is widely used now. This paper used the SVM classification algorithm for classified all database requests quickly, so the corresponding database request could be assigned to different connection pool distribution. We applied the connection pool to measurement service platform and tested on the accuracy of the SVM classifier and buffer pool hit ratios of the connection pool module. The experimental results show that the connection pools can improve the efficiency of database access obviously.
Matrix Analysis and Design Based on Algorithm of Paper Analysis
Authors: Fang Cai Li , Du Ying
Published: June 2014

Paper analysis is the main content of the educational measurement. Through the statistical analysis of the paper for scientific and objective. It can optimize teaching contents and reform teaching methods and grasp the teaching focus. The analysis also can provide the most direct help to improve the quality of teaching, so it achieves more focused, more fair, impartial assessment test on the knowledge grasping situation. Based on the paper analysis, it put forward the matrix which is used in the algorithm of test paper quality analysis, then the contents from the database will be analysed and the accessing speed is fast and strong pertinence.
Speech Signal for the Recognition of Emotion by Cultural Genetic Algorithm
Authors: Chen Cong Cong , Gong Wei , Fu Wen Long
Published: June 2014

In the speech emotion recognition system, voice signal recognition is the most critical step, the simple signal recognition can lead to errors. In this paper the cultural genetic method applied in speech recognition optimizes the voice features combination to find the optimal solution, and it provides effective method to improve the efficiency of the speech recognition.
Intrinsically Knotted and 3-Linked Graph
Authors: Ren Qiu Ping , Wang Guang Hui
Published: June 2014

Intrinsically linked graphs are very important spatial graphs. We say that is intrinsically knotted and 3-linked graph if every spatial embedding of this graph contains nontrivial knot and a non-split 3-component link. This paper exhibit a new intrinsically knotted and 3-linked graph. This paper is devoted to the operation of the exchanges preserve intrinsically knotted and 3-linked graph.
Estimation of Unknown Function in a Class of Singular Difference Inequality in Engineering
Authors: Huang Chun Miao , Wang Wu Sheng
Published: June 2014

In this paper, we discuss a class of new weakly singular difference inequality, which is solved using change of variable, discrete Jensen inequality, Beta function, the mean-value theorem for integrals and amplification method, and explicit bounds for the unknown functions is given clearly. The derived results can be applied in the study of fractional difference equations in Engineering.
The Differential Measurement Model that under the Equal Principle and its Application
Authors: Wang Shu Ying , Chai Suo Zhu
Published: June 2014

According to the equal principle, to establish the relationship between function and curved trapezoid area, designed the fluid differential measurement model, analysis of main parameters, introduced working principle, combining with the different forms of curve, depicting the derived function curve measurement method is given.
Chaotic Time Series Adaptive Prediction Based on Volterra Series
Authors: Dai Fang , Liao Gao Hua
Published: June 2014

At present, the mine has only realized the real-time monitoring of gas, but not the prediction of gas.There were some limitation of the traditional prediction method, such as modeling subjectivism and statistical prediction. Because it can dynamically adjust the parameters of the model, adaptive prediction method can get the current time according to the prediction error of data and the current time, real-time fault prediction model parameters, this is a very consistent with the prediction method for practical use.This paper presents the gas emission chaos time series method by using volterra series prediction, and on the basis to establish time-series prediction models. The results show that the method not only avoids the phase space reconstruction, but also avoid the points in the neighborhood search, in real-time, with very high efficiency.
Correlation Coefficient Matrix Based PD Feature Dimensional Reduction
Authors: Wang Yu , Yuan Jin Sha , Shang Hai Kun , Jin Song
Published: June 2014

The abstraction of diagnostic feature from field condition monitoring data is a significant research challenge. A new dimension reduction method based on correlation coefficient matrix is proposed aimed at the high-dimension characteristic parameters in the process of pattern recognition for partial discharge in power transformer. The CCM is constructed by parameters extracted from partial discharge signature in power transformer. The parameters that have similar classification characters are reduced directed by the correlation analysis result. The reduced PD features are inputted to the pattern classifiers of probabilistic neural networks (PNN). The results show that the parameter dimension is reduced and the classifier construction is simplified, and the recognition effect is better than that of the traditional back propagation neural network (BPNN) in the condition of small samples.
Cooperation Design of Target Area for ICF Facility Based on Top-Down Mode
Authors: Xu Yuan Li , Zhu Ming Zhi , Chen Gang , Wu Wen Kai , Chen Xiao Juan , Huang Zhan , Wang Mei Cong , Que Xing Hua , Wang Bao Xu
Published: June 2014

The top-down mode has been widely used in the cooperation design of complex products. It has great advantages over traditional down-up mode for such a complex system as target area for the ICF facility. By taking target area of National Ignition Facility (NIF) for example, this paper will present a process of three-dimensional cooperation design supported by a design platform. The parametric design software Creo (upgraded Pro/E) and PDM software Windchill PDMlink are seamlessly connected in the platform using the floating license. The whole design process of target area was based on top-down mode and driven by the skeleton models. The sub-assembly includes target chamber, beam transport system, and supporting system. The design has been concurrently accomplished by the system engineer and the sub-assembly engineers on the design platform. It has validated the feasibility of the cooperation design based on the top-down mode. It can technically support the realization of the cooperation design for NIF scaled high-power laser driver.
Combination Forecasting Method Based on IOWA Operator and Application
Authors: Liang Di , Ma Long Fei , Hu Ya Feng , Wu Shuang
Published: June 2014

The combination forecasting model based on induced ordered weighted averaging IOWA operators. First, individual forecasting model that has higher forecasting accuracy is chosen as a criterion. Then, the deviation of predictive values between other models and standard model is computed. The weights are given according to the mean value size of the absolute value sum of deviation in every individual forecasting model in every period. Finally, a new forecasting model is built in accordance with the weighted error sum of squares. And genetic algorithm is used to solve the optimal weights. Verified by an example, the improved combination forecasting method is better than the original combination forecasting method based on IOWA operator. Forecasting accuracy is improved effectively.
Research on a New Faucet with the Function of Depressurization and Throttling
Authors: Tian Meng Jie , Guo Yong Huan , Li Ya Qi , Guo He He
Published: June 2014

For managing water resources, rationalizing consumption structure is the key issue. In daily life, the faucet is the most common as well as the most likely to be neglected manner to use water. At present, faucets in the market are not so diverse. In some cases, the effects of pressure on the flow of water have been ignored, although they may be multifunctional. Through modifying pressure, controlling water flow can not only enhance the rational use of water resources but also increase the service life of the faucets. The results show that this kind of faucet with the function of depressurization and throttling is very worthy of applying and introducing.
Main Clutch Teaching System Designed on PLC
Authors: Wu Ji Yuan , Jin Yi , Liu Wei Ping
Published: June 2014

The paper proposes a manipulation principle teaching system of the main clutch based on PLC control with a high degree of automation. It is designed combining with the working characteristics of a certain type main clutch and its purpose is to meet the training needs of armored vehicles driving manipulation skills for junior commanders in military academies. The sensor signals can be collected by the system to simulate the driving manipulation signals. The actuators are consisted of displaying lights, electromagnets and stepper motor. So the various actuators can be controlled comprehensively to imitate main clutch mechanism to show different working conditions which can be converted according to the teaching needs.
The Design of LED Streetlights Controller with Light Control Long Time-Lapse
Authors: Li Yang , Kui Chen
Published: June 2014

This paper focus on the features of half power saving in city road lighting LED retrofits , presences a light control and time-lapse switch LED lights control scheme, use photoresistor, 555 time base circuit and CD4060 binary counter, realized the control circuit design. The experimental results show that the proposed scheme in this paper is simple, practical and reliable.
The Research on the System of Double-Holding Water Tank Liquid Level Control with the PID Control
Authors: Yu Miao , Jia Hong Li , Chen Pan Jie
Published: June 2014

Double tank level control system is the combined control with the host computer and basic instrument, and it realizes the communicative function through monitoring and management. The object of this topic is mainly on double-tank system, then gets the theoretical parameters PID through measuring the characteristic curves of the water level, and finally use MCGS configuration software on PC, for further interaction interface to the parameters tuning of double-holding water tank system and to set the parameters. After reaching the expected target, on the base of routine control PID, we can improve the system function by forming the double loop system and control the liquid level of the water bank better. The two tank liquid level control is made as the core control system by computer and as one kind of fashionable trends.
Simulation Analysis of Electro-Pneumatic Proportional Fuzzy-PID Control System Based on AMESim/Simulink
Authors: Wang Si Yuan , Ren Guang Sheng , Nie Pan
Published: June 2014

The test rig for hydro-pneumatic converter used in straddle type monorail vehicles was researched, and its electro-pneumatic proportional control system was set up and simulated based on AMESim/Simulink. Compared fuzzy-PID (Proportion Integral Derivative) controller with PID controller through fuzzy logic tool box in Simulink, the results indicate that, this electro-pneumatic proportional control system can meet design requirements better, and fuzzy-PID controller has higher accuracy and stability than PID controller.