bluuebunny/crossref_metadata_2025 huggingface dataset:
The Development of Virtual Experiment Platform for Signal Analysis and Processing Based on LabVIEW
Authors: Zhang Hong Xin , Yan Yu , Zhou Hao , Huang Ju , Sun Ji Xiang , Huang Lei , Shi Jun Shan , Qiao Yu Jing
Published: February 2014

A virtual experiment platform for signal analysis and processing based on LabVIEW is developed. Combined with basic principle and method of signal analysis and processing closely six extensible and workable virtual experiment modules are designed. These modules include signal generator, time domain and frequency domain analysis module, band-pass filter, modem, power-spectrum analysis and boundary checkout of sine signal. A simulation and analysis module of shaft orbit is developed on that basis. In the module some shaft orbit shapes corresponding to typical failures of rotors can be simulated, and the amplitude and frequency spectrum of radial displacement of rotor can be analyzed in real time.
Elastodynamics Model Updating for the Monitoring of Reinforced Concrete Beam: Methodology and Numerical Implementation
Authors: Waeytens Julien , le Corvec Veronique , Lévèque Philippe , Siegert Dominique , Bourquin Frederic
Published: February 2014

Reinforced concrete beams are widely employed in civil engineering structures. To reduce the maintenance financial cost, structure damages have to be detected early. To this end, one needs robust monitoring techniques. The paper deals with the identification of mechanical parameters, useful for Structural Health Monitoring, in a 2D beam using inverse modeling technique. The optimal control theory is employed. As an example, we aim to identify a reduction of the steel bar cross-section and a decrease of the concrete Young modulus in damaged areas. In our strategy, the beam is instrumented with strain sensors, and a known dynamic load is applied. In the inverse technique, two space discretizations are considered: a fine dicretization (h) to solve the structural dynamic problem and a coarse discretization (H) for the beam parameter identification. To get the beam parameters, we minimize a classical data misfit functional using a gradient-like algorithm. A low-cost computation of the functional gradient is performed using the adjoint equation. The inverse problem is solved in a general way using engineer numerical tools: Python scripts and the free finite element software Code_Aster. First results show that a local reduction of the steel bar cross-section and a local decrease of concrete Young modulus can be detected using this inverse technique.
Research of Navel Orange Defect and Color Detection Based on Machine Vision
Authors: Yang Guo Liang , Luo Lu , Feng Yi Qin , Zhao Hai Sheng
Published: February 2014

For the problem of high intensity, low efficiency and poor accuracy in the artificial classification of navel oranges, a detection method is proposed based on machine vision technology. In defect detection, we analyze the color information of navel oranges surface, and obtain surface defect with a proper ratio of R/B and G/B. In the detection of color and luster, we calculate the texture information of the grayscale image, and propose three characteristics such as smoothness R, "consistency" measure U and entropy descriptor e. Finally, a hierarchical model is established based on BP neural network. The test results show that this method can be used for detecting the color and luster of navel orange with a high recognition rate.
Dynamic Modeling and Grasp Characteristics Analysis of an Underactuated Prosthetic Finger
Authors: Chu Li , Zhang Yi , Deng Hua
Published: February 2014

A dynamic model was established using the virtual spring approach for the underactuated prosthetic finger containing the closed kinematic chains and holonomic constraints. The dynamic model was verified by grasp simulation. The virtual spring is used to approximate the constraint force and differential algebraic equations are converted into ordinary differential equations which are ideal for simulation and real-time control. The grasp characteristics of the underactuated finger were studied based on the model with the stiffness of the linear springs as variables. By properly increasing the stiffness of springs, the grasp stability of underactuated finger could be improved and ejection phenomenon would be reduced. However, self-adaptive capability would be reduced with large stiffness. A characteristic index was used for estimating grasp stability and self-adaptive capability. The simulation results show that setting the stiffness of the linear springs between 1N/mm and 2N/mm is the best choice for the underactuated finger.
Calculation and Analysis of Temperature Rise in Transformer Tank Based on Electromagnetic-Thermal Coupling Method
Authors: Jing Yong Teng , Li Yan , Li Longnv , Jiang Man Hua , Wang Ning
Published: February 2014

Hot-spot calculation of structure parts in large power transformer has been concerned by transformer designer and researcher. The key is the calculation of leakage magnetic field, loss and temperature rise in structure parts of transformer, belongs to the calculation of the electromagnetic-thermal coupling field. This paper calculate and analysis electromagnetic field and temperature field of a transformer tank using ANSYS analysis software based on electromagnetic fields, heat transfer theory, and the results and the test data are in good agreement; aim at the problem of local overheating, appropriate magnetic shields are used to reduce the stray losses and hot-spot temperature-rise in transformer structure parts. so the calculation method can be applied engineering design.
An Improved Image Segmentation Active Contour Model
Authors: Zhou Li Fen , Cai Chang Xu
Published: February 2014

The Chan-Vese (C-V) active contour model has low computational complexity, initialization and insensitive to noise advantagesand utilizes global region information of images, so it is difficult to handle images with intensity inhomogeneity. The Local binary fitting (LBF) model based on local region information has its certain advantages in mages segmentation of weak boundary or uneven greay.but , the segmentation results are very sensitive to the initial contours, In order to address this problem, this paper proposes a new active contour model with a partial differential equation, which integrates both global and local region information. Experimental results show that it has a distinctive advantage over C-V model for images with intensity inhomogeneity, and it is more efficient than LBF.
Research on Key Techniques of Shield Construction in Mixed Ground
Authors: Lu Hong Hao , Zhuo Fa Cheng , Bai Yun , Li Qiao Song
Published: February 2014

In underground space development, the technique of shield tunnel construction of metro has been a great challenge when it comes to construction in mixed ground. Against this background, it is significant to research the technical features and the impact on surrounding environment caused by TBM. Based on the engineering case of Nanjing South Station to Lukou airport section of Nanjing Metro Line 6, this paper discusses the new shield tunneling technology Ground Pass Shield Tunneling (GPST) which has been first applied in China. In addition, the numerical analysis of the settlement control of a specific section is also discussed. From this case, suggestions about tunneling in mixed ground are presented to facilitate further utilization of shield method in similar ground conditions.
Performance-Based Research of Existing Reinforced Concrete Building Structure Seismic Evaluation and Reinforcement Technology
Authors: Pei Li Na
Published: February 2014

Based on the current seismic codes, the elastic capacity calculation under frequent earthquake and ductile details of seismic design should be used for both seismic design of new buildings and seismic evaluation of existing buildings to satisfy the seismic fortification criterion, namely/no damage under frequent earthquake, repairable under moderate earthquake, and no collapse under severe earthquake0. For the evaluation, rebuilding and extending of existing structures which dissatisfy the ductile details of current seismic codes, the elastic capacity calculation under frequent earthquake is obviously not enough. In this paper, the advanced performance-based seismic theory is introduced while story drift ratio and deformation of component are used as performance targets to solve the problems of seismic evaluation and strengthening for existing reinforced concrete structures.
Fault Line Selection Research on Single Phase Ground Fault of Small Current Grounding System Based on Wavelet Theory
Authors: Gao Xiang , Wang Lu
Published: February 2014

For the problem of single-phase ground fault line selection of small current grounding system, in this paper, according to the wavelet theory advantage processing capabilities of transient mutation signal ,line selection criterion based on wavelet transform modulus maximum principle of singularity detection is proposed . By analyzing the single-phase ground fault waveform of small current grounding system in the neutral point not effective grounding system, steady state and transient characteristics of fault occurs is obtained, building bus with three outlets of 10KV small current grounding system simulation model by using MATLAB software, and verifying the validity though a large number of simulation experiments on the method.
Establishment of Evaluation Indication System on Embedded Industrial Technology Innovation
Authors: Liu Xiao Li , Tan Hua , Cao Shi Chao , Xing Tao
Published: February 2014

Embedded industry as a branch of the new rise of IT industry, changing people's lives. For how to create embedded technology innovation models and innovation system, embedded technology innovation brings a variety of management issues, this paper studies the embedded industrial innovation index system. First, hierarchical analysis model represents the index system 6 first level indicators and 24 secondary indicators constituted; Then, the basic idea of G1 method is based on constructing a mathematical model to calculate the weights according to solving steps; Finally, according to the mathematical model to 6 secondary indicators "research and development" first level indicators under an example to illustrate the calculation process, and lists all the index weight calculation results through form. Results of this study will help countries understand the current level of development; provide the basis for the formulation of industrial development policies.
Operation Analysis of the Rail Transit Stations Energy-Saving Air-Conditioning System Based on Petri Nets
Authors: Xu Bing , Shi Zhong Jin , Zheng Bao Guo , Zhu Xue Han , Hui Yi Huan
Published: February 2014

In order to fully research and describe the dynamics of the energy consumption of rail transportation equipment operation, this chapter will Petri nets Establishment and analysis of the environmental control system air-conditioning power consumption model, so as to deepen the understanding of the principle of the energy consumption of devices running depth grasp of energy consumption the operational features of the equipment, take appropriate and effective energy-saving measures.
Design and Implementation of the Video Player Based on the Devkit8500D Hardware Platform
Authors: Yu Xiang , Song Yao
Published: February 2014

The system realizes a touch embedded video player based on DevKit8500D development platform whose processor is DM3730. Adopting open source MPlayer as background, then the visualization operation of the player is implemented by writing a QT interface program which realizes invoking the MPlayer. At last, the interface program is transplanted on the development board. Test results show that the basic function of video player and keeping it running smoothly are realized, so the design target is reached.
Lifetime-Aware Capacity Dynamic Adjusting for Solid State Disk
Authors: Bu Kai , Liu Hai Jun , Xu Hui , Sun Zhao Lin
Published: February 2014

In this paper, we analyzed the endurance of Nand Flash memory and then proposed a level adjusting scheme to use the MLC Flash dynamically to storage different amount of data levels through the entire lifetime. The result shows that the MLC SSD adopting this method could be totally written 4.8X more data than conventional MLC SSD and 16.5% more than SLC SSD.
A Flexible Hemispherical Coverage Array Antenna Based on Multi-Planar Arrays
Authors: Pan Dian Fei , Hao Jian Hua , Cheng Nai Ping , Dou Xiao Jie
Published: February 2014

A flexible hemispherical coverage array antenna based on multi-planar arrays is proposed to meet the growing demands for multi-target TT&C. The advantages and disadvantages of multi-planar arrays and dome phased in engineering implement are compared. Meanwhile, the influence of different number of plane arrays on antenna pattern is analyzed. For the purpose of interference suppression a novel beamforming method by adding constraint conditions is analyzed to enhance the performance of antenna for TT&C system. System simulation is done based on the multi-planar arrays antenna. The feasibility of hemispherical coverage and the performance of anti-jamming are verified. Finally, a comprehensive summary is given.
Comparison of Shannon Capacity between OFDM and DFT-S OFDM
Authors: Wei Min , Yang Hong Wen , Yang Da Cheng
Published: February 2014

DFT-S OFDM, short for DFT Spread OFDM, is employed in LTE uplink to reduce the Peak-To-Average Power Ratio (PAPR) introduced by multicarrier transmission. In this paper, we compare the maximum achievable data rate, i.e. the Shannon capacity, of DFT-S-OFDM and OFDM under Rayleigh and with clipping. Our results indicate that, in terms of Shannon Capcity, OFDM outperforms DFT-S-OFDM with ZF or MMSE.
Detection of Traffic and Road Condition Based on SVM and PHOW
Authors: Jia Shi Jie , Zhai Yu Ting , Jia Xiao Wei
Published: February 2014

To avoid the defects of physical detection methods, such as road spoiling, complex algorithms and equipment maintenance, SVM (Support Vector Machine) and PHOW (Pyramid Histogram of Words) are explored to detect the traffic and road condition. Experimental results show that the average accuracies go beyond 82.5% in the case of different weather. The proposed method can effectively classify 4 types of traffic and road condition images.
Fresh Product Supply Chain with RFID: Analysis and Investment Decision
Authors: Zhang Lei , Fan Ti Jun
Published: February 2014

This paper analyzes the characteristics of fresh product supply chain and considers RFID application under decentralized system and centralized system. After that, study the investing strategies of RFID based on cost and benefit, which find the threshold value and RFID investment region for supply chain.
Camera Calibration Method Based on Vanishing Point
Authors: Li Wen Guo , Duan Shao Jun
Published: February 2014

We present a camera calibration method based on vanishing point, that is, the vanishing points of two groups of parallel lines on the target plane are used to achieve camera calibration. A series of known positions points on target plane are used as the feature points, and the target images are recorded, the image coordinates of feature points are used to calculate the coordinates of vanishing point, then the matrix between feature points and camera is used to obtain internal parameters of camera. Experimental results show that the proposed calibration algorithm is correct, simple and convenient.
A Fast Reweighted Alternating Direction Method for Wideband Spectrum Sensing
Authors: Zhu Cui Tao , Liu Xu Jie , Wang Han Xin , Liao Sheng Bin
Published: February 2014

In this paper, we propose a fast algorithm based on Reweighted Alternating Direction Method of Multiplier (R-ADMM) for cooperative compressive wideband spectrum sensing. The R-ADMM alternately updates the recovered signal matrix, the Lagrangian multiplier and the residue, and all update rules only involve matrix or vector multiplications and summations. To seek joint sparse solutions in a fully distributed scheme, multiple cognitive users collaborate during the sensing period by enforcing consensus among local spectral estimates. Meanwhile, adding weight in the target term and suppressing non-zero elements with large weights for getting the solution close to minimumnorm. The experimental results show that detection probability and detection speed of the algorithm has been improved under low SNR.
Research on Depth Information Estimation for Video Objects
Authors: Wang Wen Bin , Liu Dao Yuan , Yao Yu Qin
Published: February 2014

Through the analyzing of the color, motion, parallax and the degree of clarity in scene-all the elements presented on the 2D video, People can produce 3D video smoothly. The paper introduces a kind of pick-up algorithm of depth map, the method of combining the abstraction of motion in depth based on the block matching and the abstraction of background in depth on the basis of background subtraction. The extracted map can be applied to the video conversion technology of "2D to 3D".
Design and Implementation of Actual Cost Calculation Module in Forest Industry Cost-Management System
Authors: Wang Guang Yu , Zhang Li Wei , Zhang Jing
Published: February 2014

According to the realistic requirement of forest industry production cost-management, the system divides into four modules: login control module, system maintenance module, data calculation module, querying and printing module. In this paper, JSP technology [ is applied in design and implementation of the actual cost calculation in data calculation module. It can achieve production cost-management analysis and accounting effectively, share data resources on the network platform, to provide reliable data for the corporate executives.
Improving Workflow Management System Implementation with Workflow Localization Method
Authors: Tong Xin , Zhang Xiao Long , Xu Xin , Qi Ju Hong
Published: February 2014

The workflow management system plays an important role in enterprise information management system. An enterprise workflow contains a lot of business process and their relevancies. These relevancies are important in building workflow management system. This paper proposes a business relevance based workflow localization method to divide the workflow locally. In this method, a workflow is treated as a combination of local processes; therefore single task can be divided into several subtasks. This method can reduce the difficulty and improve the efficiency in building workflow management system. This method has been practically applied to the design and development of steel pipe production supervision control system. The actual results validate the effectiveness of the proposed workflow localization method.
Experiment and Analysis System without Modulation Locked Fiber Grating System
Authors: Wang Hui Bo
Published: February 2014

High stability of semiconductor lasers have been shown useful in many applications areas,[such as optical communication, high-resolution spectroscopy quantum metrology, laser cooling and trapping[. With the rapid development of fiber optic dense wavelength division multiplexing system, we require laser source with high frequency stability in 1.5μm band. In this paper It is clear that temperature, cavity length and injection current have effects on frequency stability of FBG external cavity semiconductor laser by simulation experiments. Besides that, the frequency stabilization system is adjusted. Therefore, the frequency jitter spectra before and after locking are given and the experimental results are analyzed. The results show that after locking laser the typical frequency jitter is significantly improved comparing with frequency fluctuation in the condition of free running.
Cloud Task and Virtual Machine Allocation Strategy Based on Simulated Annealing-Genetic Algorithm
Authors: Xu Xing , Hu Na , Ying Wei Qin
Published: February 2014

In order to solve and optimize the task and virtual machine allocation strategy in cloud computing environment, firstly allocation strategy mathematical model, the target of which is the total running time, is established, then a simulated annealing and genetic hybrid algorithm is proposed to solve the mathematical model. The integer coding, a crossover operator, two kinds of mutation operators and the selection mechanism based on simulated annealing strategy are applied in the hybrid algorithm. In the experiments, three sets of data are used to verify the performance of the hybrid algorithm in the Cloudsim software. And the experimental results show that the series of cloud tasks can effectively be assigned to the virtual machine by the hybrid algorithm and the total running time is also minimized by the algorithm.
DFIG Based Wind Power Generation System RSC Controller Design
Authors: Wang Wu , Chu Yi Min
Published: February 2014

DFIG based wind power generation system was connected to power grid with voltage source converters, the rotor side converter was analyzed and the control strategy was taken, the voltage and flux equations of the DFIG was analyzed, stator flux-oriented for RSC was adopted in the control system and with the control design based on stator flux-oriented (SFO) vector control. The RSC controller of DFIG was a double closed loop system, the rotor current control loop and power control loop was designed with PI, and the simulation shows the control feature.
An Application of RFID Technology in Traffic Congestion Management
Authors: Feng Hai Yang , He Jia Liang , Zhang Li Jun , Meng Fan Gang
Published: February 2014

RFID is a technology which is used to identify remote objects embedded with RFID tags by wireless scanning without manual intervention; it can be used in traffic management wildspread. In this paper, we propose RFID tag management process for every vehicle firstly; some typical or potential RFID applications in traffic management are introduced such as vehicles congestion managementandengineemission inspection from petrol automotives subsequently; finally, the existing issues of implementation of RFID systems are generalized.
IaaS Architecture Based on Trusted Computing
Authors: Zhang Wen Bo , Bao Zhen Shan , Li Jian , Duan Li Juan
Published: February 2014

The dynamic, heterogeneity and complexity make cloud platform much less credible. As a vital level in cloud computing platform, IaaS is very important to improve the trustworthy degree of cloud. In this paper, we explore this area, we identify the fundamental function provided by the trusted IaaS, we identify the indispensable tasks completed by the trusted IaaS, and then we propose a foundation framework for establishing trusted IaaS. Finally, we gave a conclusion and the direction of future works.
Diagnosis of Nuclear Power Plant Based on Probabilistic Neural Network
Authors: Xie Chun Ling
Published: February 2014

This paper presents development of an automatic fault diagnosis system in the nuclear power plants to minimize possible nuclear disasters. Probabilistic Neural Network (PNN) overcame the shortcomings of entrapment in local optimum, slow convergence rate which was in BP algorithm. PNN is fit to diagnose the fault of nuclear power plant and has auto-adaptability. The method not only makes the original neural network smaller in terms of computation and realization, but also improves diagnosis speed and accuracy of nuclear power plant.
Study on the Defect Classification Model
Authors: Han Wan Jiang , Yi Sun , Yan Li , Li Wei Jian , Ye Li , Xiao Han , Chi Liu
Published: February 2014

This paper presents the concept of defect classification model, which is based on the technology of similarity. Defect classification model can analyze software defect more efficiently and provides the basis of solving problems quickly. This paper applies this model to GUI project and gives a GUI defect classification model based on large number of interface defects. Experiments show that the model is useful to improve the process of defect management and be used for test planning and implementation.
Air-Transportation Networks and the Spatial Spreading of Infectious Diseases
Authors: Xu Zhi Jing , Zu Zheng Hu , Zheng Tao , Xu Qing , Zhang Wen Dou , Liu Jin Jie
Published: February 2014

Many studies suggest that air-transportation networks contribute a lot to the spatiotemporal dynamics of infectious diseases. The mobility of individuals over the networks has greatly speeded up the spreading processes of the epidemics and pushed the population in non-epidemic areas into the risk of infection. To figure out the underlying interactions between the air-transportation networks and the transmission of the epidemics, we have (i) analyzed the air-routes and the statistical data on the passenger throughput of the civil aviation of China and (ii) carried out a computer simulation based on the assumption that a novel influenza outbreaks in Southeast Asia. The results show that the topology of the air-transportations networks has a typical structure of heterogeneities. We also find that the epidemics will soon strike China after the initial outbreaks and rapidly spread throughout the whole networks without air-travel restrictions even the reproductive number () is small.
Design of Temperature Measurement System Based on Microcontroller
Authors: Rui Cao , Bao Kong Jun
Published: February 2014

This temperature measurement system is based on the control of AT89S52 single chip microcontroller, with temperature display function. Temperature information is changed into digital signal directly by a single bus digital temperature sensor DS18B20, and the digital signal is sent into microcontroller for real-time acquisition. The results are displayed through LCD module 1602 in real time. The system is with the characteristics of low cost, high precision, stable performance and convenient operation. The system can be extended to multi-point temperature detecting system easily, and adding temperature transfinite alarm function.
Design of Control System for Monitoring Camera Cleaning Robot
Authors: Li Xiao Meng , Zhang Shu Ce , Liu Yong , Tao Xue Heng , Wang Xue Jun , Lu Jin Shi
Published: February 2014

In order to solve the problem that manual cleaning high-altitude monitoring camera is difficult and risky, the scheme that mobile knee-type robot with three degrees of freedom cleans the monitoring probe instead of worker is proposed, and the control system based on MCU is designed. The hardware and program design is finished, which includes movement of manipulator, cameras jet cleaning with high-pressure spray gun, drying of cameras surface, ultrasonic obstacle avoidance, camera monitoring and image processing module. At last, the experiment and test for the cleaning robot prototype are carried out.
3D Multi-Touch Screen Based on Pressure Sensor
Authors: Guo Xue
Published: February 2014

This paper describes a 3D multi-touch screen based on pressure sensor. Aiming at the disadvantage of traditional capacitive touch screen such as detection errors and inaccurate positioning caused by environmental impact, the multi-touch screen in this paper adds thin film pressure sensors and control chips on the ordinary capacitance touch screen, which can obtain the number and location of touch points and the corresponding touch pressure. This 3D Multi-touch screen is simple and compact in structure, improves the accuracy of touch detection effectively and realizes the 3D multi-touch operation, it's safe and reliable.
Dynamics Analysis and Control Strategy Simulation of Lower Extremity of Power Assist Robot
Authors: Li Xin Jun , Mao Xi Wang , He Long , Wang Xin Rui
Published: February 2014

Lower Extremity of Power Assist Robot could add the strength and endurance of robotics to a human's innate adaptability to help the wearer transport heavy loads over rough and unpredictable terrain. Dynamics Analysis and Control Strategy Simulation are the important aspects for the researching of the robot. The dynamics equation of Lower Extremity of Power Assist Robot is built by the Lagrange equation. The relationship between the active joint torque of the robot and plantar pressure is established, which support the theoretical foundation for the dynamic control to achieve the desired effect. Base on the analysis of working environment and the mechanical environment of the robot, the force-location control theory is used to control robot, which is simulated based on Simulink blocks of MATLAB to get a better tracking performance.
Study on Nonlinear Problem of Active Noise Control System for Power Transformers
Authors: Zhang Bin , Wu Guo Xing , Li Si Wu , Ying Li Ming , Peng Hui
Published: February 2014

With the development of active noise control technology, ANC system has been gradually introduced into practical application. And some researches and experiments notice that ANC system may encounter with nonlinearity problems under certain conditions in practical applications. The paper analyses and summarizes possible factors that may lead to nonlinearity problems, based on the operation principle and structure features of ANC system, and classifies the main methodologies of dealing with nonlinearity problems considering the main technologies and researches nowadays of system nonlinearity with the same analyzing structure of nonlinearity factors mentioned in the paper. The paper also elaborates the strength and weakness of different methodologies and the most appropriate application condition for each methodology, and it provides theoretical basis for nonlinear active noise control system.
The Application of Computer Vision in Cultural Production Innovation
Authors: Zhu Xu
Published: February 2014

CCD technology is used in production process of cultural products to detect flatness, which reduces the error formation probability. This paper proposes an image detection model for cultural production flatness measurement based on computer vision feature point matching algorithm. The method uses the pixel frequency sorting method to divide pixel level of collected images, so as to obtain high precision pixel characteristics as the basis for measuring the flatness for cultural products' structure, and extracts image features of cultural products and carries out matching process to establish an image detection model for flatness measurement. The experimental results show that the proposed algorithm greatly improves the accuracy of flatness measurement for cultural product structure.
Image Identification Based on the Compound Model of Wavelet Transform and RBF Neural Networks
Authors: Gong Rui Kun , Liu Ping Ting , Gong Yu Han , Wang Chong Hao
Published: February 2014

The image definition identification method based on the composite model of wavelet transform and neural networks is stronger in image edge character extraction, nonlinear process, self-adapted study and pattern recognition. The paper puts forward an evaluation method of image definition based on the focusing mechanism of simulating persons eyes by neural networks and on the composite model of wavelet transformation and neural networks. The wavelet component statistics obtained by the wavelet transform are taken as the inputs of the 5 layer RBF neural network model. The model identifies the image definition applying the steepest descent method of the additional momentum in a variable step size to adjust the network weights. The compound model is first trained by 75 images from the training set, and then is tested by 102 images from the testing set. The results show that this is a very effective identification method which can obtain a higher recognition rate.
Simulation of Droplets Formation in Co-Flowing Microfluidic Channels
Authors: Li Ze Fu , Zhang Lin , Luo Xuan , Wang Xiao Jun , Yang Yi
Published: February 2014

Emulsion droplets or multi-emulsion droplet formation was important for functional materials synthesizing by microfluidic. To obtain tunable monodisperse droplets with millimeter scale, the flow regime in co-flowing channels was divided by numerical simulation. A typical co-flowing model was created using finite volume method, and the VOF (volume of fluid) muti-phase model was selected. Then, droplets were produced by changing the velocity ratio under the dripping regime. Compared to the experimental value of droplet diameter, theoretical and numerical absolute error was below 60 % and 15 %, separately. Greet agreement of diameter changing tendency was found in simulation and experiment.
Micromouse Solve Maze Based on Flood-Fill Algorithm
Authors: Zhang Hao Ming , Peh Lian Soon , Wang Ying Hai
Published: February 2014

Micromouse championship is an international robotics competition is an event where small robot micromouse solves a 16x16 maze. Use center rule + straight-right rule the micro-mouse can quickly explore the unknown maze and find their way from a predetermined starting cell to the central area of the maze, then back to the starting cell. Map out the maze and use flood-fill algorithm to find an optimal route from the starting cell to the center cell, the micromouse will run that route in the shortest possible time.
Hybrid Key Management Scheme for WSN
Authors: Zhao Nan Nan , Yao Jian Bo
Published: February 2014

Wireless sensor networks are widely applied in various applications. But due to the resource-constrained sensor nodes and the malicious attacks, the traditional key management schemes are not suitable for the network. Contraposing the particularities, many relevant key management schemes are developed for WSNs the network. Based on the framework of WSNs, existing schemes can be classified into two categories: flat distributed architecture and hierarchical architecture. In this paper, a hybrid key management scheme for wireless sensor network is proposed by combining the distributed architecture and the hierarchical architecture. Based on the modified version of Dus matrix construction, this scheme can apply in WSNs with the network topology changes. Compared with existing key management schemes, this scheme can provide sufficient security, nicer key connectivity and low key storage overhead.
FBG Sensing Demodulation Technology Based on Acousto-Optic Tunable Filter
Authors: Li Xiao Juan , Chen Ze Gui , Xie Zhi Yong , Liang Xiao Bin , Zhao Xian Long
Published: February 2014

This paper describes FBG sensing demodulation technology which based on acousto-optic tunable filter, this technique solves the traditional FBG demodulation technique existing some problems such as slow demodulation speed and small number of driving FBG sensors. The demodulation technique has advantages with simple structure, low cost, wide wavelength range, high resolution and fast demodulation speed.
Microtubules Dynamics Regulates Mesocotyl Elongation in Rice
Authors: Li Li , Wang Che , Liang Qian , Ma Dian Rong , Chen Wen Fu
Published: February 2014

Mesocotyl elongation in rice is essential for seedling emergence. Our previous screening identified weedy rice accessions (Oryza sativa f. spontanea L.) (WR04-6) with unusual long mesocotyl. In this study, using rice cultivar Akihikari (Oryza sativa, subspecies japonica) as control, we observed that weedy rice accessions display more extensive microtubules (MTs) depolymerization in the early stage of mesocotyl elongation. At the end of mesocotyl elongation, the predominant MTs in weedy rice are transversely oriented, while, Akihikari has oblique MTs arrays.
Parameter Optimization of Vacuum Freeze-Drying Processing on Tan Lamb
Authors: Ji Chen , Fan Yan Li , Liu Gui Shan , Wang Wei , Luo Rui Ming
Published: February 2014

In this paper, the effects of drying chamber pressure, heating plate temperature and material thickness on the drying time of Tan lamb in vacuum freeze-drying process were studied using quadratic regression orthogonal design. The results showed that the drying time was significantly affected by drying chamber pressure, heating plate temperature and material thickness as well as the interaction of heating plate temperature and material thickness. The optimized parameters were drying chamber pressure 27.9 Pa, heating plate temperature 47.9°C and material thickness 4.3 mm. On these parameters, the drying time was 4.3 h.
Research on the Color Performance Changes of iPad Affected by Brightness Settings
Authors: Zhang Jian Qing , Liu Zhen , Lu Liang , Yu Hai Qi , Zhang Xi
Published: February 2014

The relationship was derived between the brightness setting and the corresponding color characteristics of the new pad display. Chromaticity domain coverage ratio , channel additivity and the constant channel chromaticity under difference brightness values were measured and compared in detail. The experimental results showed that brightness settings had a great influence on channel additivity, Chromaticity gamut coverage and the constant channel chromaticity meanwhile stable Chromaticity gamut coverage and good channel additivity and the constant channel chromaticity, respectively corresponding to different brightness range . conclusion: When brightness was setted in the range of 200cd/m2 ~ 353 cd/m2 , the new pad had better color performance and more stable.
A Parallel Communication Power Supply Based on UC3846
Authors: Wan Yong Da , Liu Ping , Lu Jing , Bao Xu Heng
Published: February 2014

This paper is intended to design a parallel 50v/2A converter. The paper begins with the respective detailed working principles of PWM current control mode and voltage control mode, as well as their differences. By introducing the PWM IC UC3846 for current mode control, in order to meet the demand of duplex output, a full-bridge circuit is designed based on double chip PWM control, and the control circuit and the main circuit are explained in detail. The paper concludes with the proposal of a prototype that meets the expected experimental results.
Development of a Digitized Medium Frequency Electronic Therapeutic Instrument
Authors: Jiang Li Qiu , Jin Jian She
Published: February 2014

In the process of physical therapy, it is usual to stimulate nerves or muscles of body with electrical signals through the electrodes, such as changeable square waves or sine waves, to control the corresponding functions or the action of muscular dilatation so as to relieve the pain of patients. On the basis of recent medical research, bell-like wave and exponential wave are most suitable for use. A digitalized medium frequency electronic therapeutic instrument based on the ARM embedded system is developed. The discrete bell-like wave and exponential wave are generated through the S3C2410 microprocessor, and then the digital signal is converted into analog signal through D/A converting chip. Finally the analog signal is amplified and output through power amplifying and isolated output circuit to generate the curing wave for human body. This method solved the difficulty of generating bell-like curing wave in traditional analog medium frequency electronic curing instrument.
Navigation Satellite's Lifetime Model and Optimization Design
Authors: Zeng Hui , Xia Xue Wen , Liu Zheng Gao , Wu Lei
Published: February 2014

The global navigation satellite system (GNSS) is an important infrastructure of the space-time positioning; not only plays an momentous role in the building of national defense and national economy, but also the world's major competitive battleground of space powers, space technology and its applications. Accurately grasp the characteristics of the life of the GNSS, redundancy of key components to establish a practical satellite program, is one of the prerequisites of the satellite lifetime assurance measures. In this paper, we build the satellite lifetime grid model based on the satellite key components lifetime degradation models, optimize the key components redundancy design scheme combining genetic algorithm. To guarantee the lifetime of the entire star, optimize the satellites cost, provide the theory support of decomposition and optimization of life indicators for GNSS.
A Metadata Management Model for Massive Data Engineering in Oilfield
Authors: Xiong Hua Ping , Liu Wan Wei , Zhao Chun Yu
Published: February 2014

Petroleum engineering is a complicated subject which involves multidisciplinary teams of scientists, engineers, operators and managers to use real-time and historic data to perform modeling, interpretation, analysis and decision-making activities. During this process, some very crucial tasks come from how to effectively collect and manage the acquired datasets, how to efficiently provide data services, and how to control and assess data quality. In addition, heterogeneous sources and various types of the datasets make the process more complicated. To achieve effective data engineering, metadata is discussed in this paper. Furthermore, a comprehensive, extensible and operational metadata model is presented. The model is discussed from different perspectives. Conceptually, it is a metadata framework with four levels of abstraction. Logically, it characterizes a three-dimensional geological data map that interconnects geological entities on the plane and mounts data resources as sub-trees on the other dimension. Physically, it adopts a federated topology and supports distributed storage and management by virtual nodes mapping. Finally, how the metadata model works in data governance, collection, management, and service is illustrated.
Scientific Features of Top Machine
Authors: Bai Yun , Zhang Feng Ming , Che Wan Fang , Li Yuan , Niu Cong
Published: February 2014

Most of the research on the relationship between Artificial Intelligence (AI) and Complexity argued the possibility and reality from a philosophical point of view. Recently A few papers popped up to explored AI Science through Complex System Theory. In fact, Dr.Bais conception of the Top Machine (TM), which was firstly proposed in his dissertation Generalized Symbolism and Knowledge Presentation of Hyper Topology Structure in 1999, may comprise the following three fundamental points. He proposed this idea, defined it, and established the Wave and High Jump Principles. This paper intended to explore the scientific features of the TM Model in relation to the three concerned points, and drew the conclusion that TM model is worth in-depth study not only because it visualized the complexity of AI Science, but also it could be an abstract conceptual model of Intelligent System (IS).
Vector Control System of Seven-Phase Induction Motor Based on DSP
Authors: Guo Ji Ling , Qiu Zhong Cai , Xiao Jian , Luo Peng
Published: February 2014

In this paper, a vector control strategy with UVM for seven-phase induction motor drives is presented and tested.Based on the spatial decomposition model of 7-phase induction motor, the d-q fundamental spatial components are controlled using vector control strategy. However the harmonic components of currents are generated by the harmonic components in the 3rd and 5th harmonic subspaces.Combined with voltages in harmonic subspaces set to be zero, the UVM with harmonic current elimination is proposed.Based on the simulation, experiment results verify the feasibility and effectiveness of the strategy proposed on the 7-phase IM experimental setup with DSP core TMS320F28335.
Research on the Mass Event Simulation Based on Emotional Contagion Model
Authors: Gong Qing Ge , Wang Dan Qing , Yang Kan
Published: February 2014

The mass event happens frequently, and once dealt not well, the event will lose control and the result is unimaginable. This paper, based on the analysis of the theory of the emotional contagion, proposes leveled emotional model based on the importance of leaders. By improving the interaction algorithm of the participants, introducing the factors of followers, emotional decline, emotional un-adaption, moving around, we also build an emotional affection model of the mass event. Finally we explore the general rule of the mass event through simulation in the AnyLogic software, which can provide policy when facing mass event.
Fault Diagnosis Expert System of Turbine Generator Sets Based on Rule Reasoning and Case Reasoning
Authors: Yan Chang Feng , Wang Hui Bin , Zhou Li Long , Li Zhi Xin
Published: February 2014

A synthetic fault diagnosis expert system for turbine generator sets based on rule based reasoning and cases based reasoning is built in this paper. The structure of synthetic fault diagnosis expert system is discussed. The rule base and case base for the fault diagnosis of expert system is established based on the domain expert knowledge and relevant fault cases of turbine generator sets. Both the inference flow and case retrieval strategy of diagnosis system are discussed in detail. Finally the expert system is verified by a given application example.
Application Research of the Total Expectation Formula in Stochastic Model
Authors: Yun Xiao Qing
Published: February 2014

This paper deals with a stochastic model in which claim number follows compound Poisson-Geometric process. By the total expectation formula, renewal equation satisfied by ruin probability has been given, and then, the explicit ruin probability formula is gotten in case of exponential claim amounts.
Optimal Control of Flight Delays Allocation at Airport
Authors: Xing Zhi Wei , Yu Jiang , Lu Hong Yue
Published: February 2014

Aiming at improving the unreasonable situation of flight delay allocation, an optimization model which contains two cases was proposed. One of the cases is to transfer all the delay to several delayed flights to avoid delay spread, which can increase the flight punctuality rate to ensure the departure of the majority flights. Oppositely, the other is to balance the delay losses of airlines, as well as the passengers, for realizing the fairness. According to the latest data from an airport in western China, the model was verified with genetic algorithm, which indicates that the model not only decrease the total delay losses, but also optimize the flight delay allocation which achieves the initial goal.
Research on Sensitive Ports under the Action of Different ESD Initial Injected Voltage of Typical High-Frequency Low-Noise Silicon Bipolar Transistors
Authors: Dong Kang Ning , Zhang Xi Jun , Yang Jie
Published: February 2014

In order to find the influence of ESD initial injected voltage on sensitive port of some high-frequency low-noise silicon bipolar transistors, some electrostatic discharge (ESD) experiments were taken on 9014 and 2SA812, which are beneficial to study the relevant law of ESDS (ESD sensitivity). The results show that the reverse-biased collector-base junction of 9014 and 2SA812 satisfied the law of latent damage. Besides, the ESD initial injected voltage is inversely proportional to the number of ESD before the device out of work, and proportional to the failure voltage.
A Low Power SiGe-BiCMOS LNA for COMPASS Applications
Authors: Yu Bing Liang , Li Jin , Li Wen Yuan
Published: February 2014

A novel low-noise amplifier (LNA) suitable for COMPASS receiver applications is designed in SiGe-BiCMOS technology. Inductively degenerated technique and resistive feedback technique are employed to reduce the noise figure. With 1.8V power supply, the measured results achieve 17.23dB power gain and 2.58dB noise figure at 1.561GHz.
Patent Analysis of the Rare Earth Extracting Separation Technology
Authors: Li Hai Li , Zhao Yi Qiang
Published: February 2014

The extraction separation is a main process to obtain the rare earth metals. In this paper, the distributions of the patent applications on the rare earth extraction separation techniques were analyzed. The main methods of the rare earth extraction separation including solvent extraction, precipitation and ion exchange were summarized. The existing problems in the rare earth industry were discussed and the development trend of rare earth industry was predicted. Furthermore, the effective patent strategy in this field was also brought forward.