bluuebunny/crossref_metadata_2025 huggingface dataset:
A Grayscale Image Fragile Watermark Authentication System in Spatial-Domain
Authors: Zhan Xu , Lei Yue Rong , Du Ling Yan , Zeng Hui Ming , Chen Jian Ling
Published: August 2013

This study deals with devising and implementing a novel technique for image authentication and secured message transmission based on hiding large volume of data into gray scale images. A grayscale image fragile watermark authentication system in spatial-domain is proposed. First it preprocesses the watermark image and resizes it to a quarter of the size of the original image. Then, it generates a random key matrix K and 128bit message authentication code from the original image. It replaces the 128bit message authentication code for the former 128bit of K to obtain a new key matrix KH. Then, it calculates the embedded position P=KHi xor (b7,b6,b5.b4) i MOD 3. b7,b6,b5,b4 are the high 4 bits of the original images pixel. It embeds the watermark image according to P value to the lower 4 bits of the original images pixel. The system is made in experiment. The result shows the system has good imperceptibility.
A Color Image Authentication System
Authors: Lei Yue Rong , Zhan Xu , Du Ling Yan , Zeng Hui Ming , Chen Jian Ling
Published: August 2013

Image authentication has achieved a sharp attention now a day due to broad availability of internet services. Maldistribution and illegal copying of image volatiles the authenticity of image-ownership. In this regard the digital watermarking-based image authentication system is studied. A color image authentication system is proposed. This system converts a color image into a grayscale image, and divides the grayscale image into 8*8 small pieces. Each small piece is made into DCT transform and extracted low frequencies to form the watermark. Then, the original image uses LSB algorithm and hash algorithm in watermark image to form authentication code. The system makes the authentication code as watermark information to embed watermark. The system is made in experiment. The result shows the system has good imperceptibility.
Application Boundary Element Approach to Compute the Electric Field Intensity of the Thirteen-Needle Electrodes in Vacuum
Authors: Liu Fu Ping , Wang An Ling
Published: August 2013

According to the electric field intensity of thirteen-needle electrodes in vacuum, the discrete equations based on the indetermination linear current density were established by the boundary element integral equations. The non-uniform distribution of the current flowing from thirteen-needle electrodes to conductive in vacuum was imaged by solving a set of linear equations. Then, the electric field intensity generated by thirteen-needle electrodes in vacuum at any point can be determined through the boundary element method. It means that this method has an important referenced significance for computing the electric field intensity generated by thirteen-needle electrodes in vacuum
The Design for Tension Control System of FOG Coil Winding
Authors: Zhang Peng , Yang Rui Feng , Zhang Xue Liang
Published: August 2013

FOG coil (fiber coil) is the core component of the FOG. During the winding, the tension of fiber winding directly affects the performance of fiber coil. The paper proposes a PID controller as the core of the tension control method and establishes the related model between rolling-up fiber spool and discharging fiber spool. The simulation results in Matlab Simulink show that the tension control system can primely coordinate the winding tension and have fast response, small overshoot, high accuracy and stability.
Analysis and Implementation of Transplantation Bootloader over UART
Authors: Hua Guo Hua , Yao Quan Yi
Published: August 2013

Firstly, this paper introduced the target device hardware system and software development tools, the former is based on TI DM3730. Secondly, by analyzed the bootloader workflow, and compared with different bootstrap process, TI UART was selected to transplant the UBOOT to target device. The paper provided detail operation procedures and pseudo code.
Design of a Wireless Laser Pointer Based on MCU
Authors: Dong Sheng , Wang Zhe Xu , Gao Xi Rui , Yao Jing
Published: August 2013

Wireless laser pointer is widely used in multimedia teaching. Due to the usage of professional high speed USB interface chips and USB2.0 protocol, the price of a wireless laser pointer in the market with the only function of changing PPT pages is about 50 dollar.This paper completes a very low price design of wireless laser pointer for multimedia teaching use based on STC89C52RC MCU and nRF905 single-chip radio transceivers,which can complete not only PPT page turning forward or backward but also black screen, drawing lines with fluorescent pen or needlepoint.
Research of Geoelectric Field Observation Interference with Different Electrode Arrangements from UHVDC Power Lines
Authors: Tang Bo , Qiao Fei , Ge Guang Zu , Qu Zi Hang , Huang Ying , Zhu Jian Xiong
Published: August 2013

The interference from UHVDC power lines is a key issue puzzling the geo-electric field observation in seismic station. According to the working principle of geo-electric field observation instrument, the interference reason on geo-electric field observation is analyzed, which potential distribution of the electrodes in soil of geo-electric field observation instrument is changed by the ground current from ground electrode of power line. Based on the different electrode arrangements, the electric field calculation model at different positions away from ground electrode is established, and thus the variation could be acquired. The results show that interference values are affected due to the electrode spans and the electrode arrangement directions, and there has the minimum interference when the electrode span is 100 m or the angle between line of two electrodes and radial line of ground electrode is 45°.
Improve the LVRT Ability of Wind Farm with DFIG by Combination of SVC and DVR
Authors: Wang Xiao Lan , Xian Long , Ma Cheng Xia
Published: August 2013

According to the demand of low voltage ride through (LVRT) in China, the operation features of DFIG during grid fault are analyzed. A new topology combining SVC with a novel DVR is put forward in this paper. The problems such as slow voltage recovery in early time of the grid fault and over compensation of voltage in the later time of the fault are overcome. The over current in rotor side of DFIG during the grid fault is restricted at the same time. The simulation model for the new topology is built in MATLAB/Simulink. The effectiveness of the topology in improving the ability of LVRT is verified.
Design of a 6502-Compatibable Microprocessor
Authors: Xu Rui , Jiang Zhan Peng , Dong Chang Chun , Cui Lin Hai
Published: August 2013

An embedded microprocessor core used for ASIC is presented, which is compatible with 6502 microprocessor. Simulation shows that the timing sequence of the circuit meets the requirement of 6502 microprocessor. The device features high speed and low power consumption.
Design of a Low-Voltage Low-Power CMOS Operational Amplifier
Authors: Cui Lin Hai , Xu Rui , Jiang Zhan Peng , Dong Chang Chun
Published: August 2013

A low voltage, low power two-stage operational amplifier (op-amp) was proposed in this paper. A folded-cascode structure is used in the input stage of the amplifier to get high gain. Current mirrors are used in the input stage to make the transconduotance constant. A simple push-pull common source amplifier is adopted as the output stage to take the advantages of its high efficiency. The experimental results show that the unity-gain bandwidth is 12.5MHz, the low-frequency open-loop voltage gain is 100dB,the phase margin is 65°, and power dissipation is 98.8μw.
Design of a Low-Power Rail-to-Rail CMOS Operational Amplifier
Authors: Guang Yang , Yu Bin , Hai Huang
Published: August 2013

In this paper, an operational amplifier with low-power consumption has been designed. Using the complementary differential pair for the input stage and the class AB structure for the output stage, the common-mode input range and output swing of the proposed circuit could achieved rail-to-rail. Based on TSMC 0.18μm CMOS process, using HSPICE 2008 software for circuit simulation, the results showed that the proposed op-amp has more than 100dB open loop gain, meanwhile the static power consumption is less than 300μw. The circuit's phase margin is 68 degrees, CMRR is 135dB and power supply rejection ratio is 63dB.
The Application of Wind Speed Numerical Simulation in Wind Power Generation
Authors: Liu Li Yang , Wu Jun Ji , Meng Shao Liang
Published: August 2013

With the massive development and application of wind energy, wind power is having an increasing proportion in power grid. The changes of the wind speed in a wind farm will lead to fluctuations in the power output which would affect the stable operation of the power grid. Therefore the research of the characteristics of wind speed has become a hot topic in the field of wind energy. In the paper, the wind speed at the wind farm was simulated in a combination of wind speeds by which wind speed was decomposed of four components including basic wind, gust wind, stochastic wind and gradient wind which denote the regularity, the mutability, the gradual change and the randomness of a natural wind respectively. The model is able to reflect the characteristics of a real wind, easy for engineering simulation and can also estimate the wind energy of a wind farm through the wind speed and wake effect model. This paper has directive significance in the estimation of wind resource and the layout of wind turbines in wind farms.
GPS/INS Integrated Navigation Based on Unscented Kalman Filter
Authors: Xu Wan Li , Liu Zhun , Liu Jun Hui
Published: August 2013

[Purpose] In GPS/INS integrated navigation, which is widely used in high precision of the real-time navigation, the Extended Kalman Filter (EKF) has become one of the most widely used algorithms. Unfortunately, the EKF is based on a sub-optimal implementation of the recursive Bayesian estimation framework applied to Gaussian random variables. This can seriously affect the accuracy or even lead to divergence of the system. In order to improve the accuracy, we apply the Unscented Transformation to GPS/INS integrated navigation. [Method] This paper optimizes GPS/INS integrated navigation by applying the Unscented Kalman Filter (UKF) algorithm which is based on the Unscented Transformation. [Results] The experimental results show that the UKF has an error reduction of over 10% in every estimator relative to the EKF. [Conclusions] Consequently, the UKF is an effective algorithm to improve the accuracy of GPS/INS integrated navigation.
Storage and Management Approach of Raster Image in Georaster Model
Authors: Li Guang Shi , Yang Ming , Li Ji
Published: August 2013

The putting forward of Georaster brings a new opportunity for realizing integrated storage of raster data and vector data in Oracle Spatial . This paper analyzed raster images storage and management mechanisms using Georaster model of Oracle spatial, including GeoRester data model,physical storage structure, data block and pyramid strategy. On this basis, the paper demonstrated a typical example of storing and managing raster image data. Through a large number of experiments, the paper pointed out that the Oracle's raster image data loading tool cannot upload large capacity raster image. Aiming at the disadvantage in terms of data capacity, the paper presented a simple yet effective solution, which adopts block processing way, is consistent with "divide and conquer idea, can improve data processing and network transmission speed.
The Feature Description Method of Radar Signal Based on Improved Kernel Density Estimation
Authors: Ye Fei , Zhou Jie , Luo Jun , Gao Xing Rong
Published: August 2013

According to the problem that the existing radar signal feature cannot effectively express and analysis its characteristic, a description method of radar emitter signal feature based on improved kernel density estimation is proposed. This improved kernel density estimation algorithm combine the selection of fixed window and variable window's width to achieve the window's width automatic adjustment value between the different estimation points based on the sample distribution. Then the probability density curve using kernel density estimation algorithm as radar emitter signal parameters characteristics stored into database.
LDA Face Recognition Standardization Version SL2
Authors: Liu Min
Published: August 2013

Facial recognition systems often suffer from the problem of "small sample size". Based on the standardization of the LDA algorithm and subsequent improvements, combined with a method of integration using the AdaBoost algorithm, an important value function is added in each iteration process to the difficult elements of the separate sample. Increasing the differences between classifiers improves the separability of the sample in the new feature space, improving the recognition rate to 98.5%. Experiments on the ORL database show that the proposed algorithm is better than traditional one
FCM Optimized with Differential Evolution for Image Segmentation
Authors: Guo Peng , Li Nai Xiang
Published: August 2013

We propose an image segmentation approach with FCM optimized by Differential Evolution (DE) algorithm, a weighed summary validity function with some popular FCM validity functions is presented to form the fitness function of DE, we check our approach with some validity functions and compare experimental results between FCM and our method, comparisons show high performance of our approach.
Locally Adaptive Wavelet Thresholding for Speech Enhancement
Authors: Liu Kang , Cheng Jian Zheng , Cheng Li
Published: August 2013

There are strong dependencies between wavelet coefficients of speech signal,in this article,based on that,a new corresponding nonlinear threshold function derived in Bayesian framework is proposed to decrease the effect of the ambient noise.Analysis of the data shows the effectiveness of the proposed method that it removes white noise more effectually and gets better edge preservation.
A Design of UART Serial Communication between the TMS320C6748 DSP and PC
Authors: Wu Xun , Mei Yue Song , Yu Jian Qiao , Yu Tian Peng , Li Jing Xu
Published: August 2013

The digital signal processor (DSP: Digital Signal Proceeding) are widely used in industrial, military, communications and the other fields, so the research and design work about DSP is one of the hot spots of scholars and research. Communication and data transfer between the DSP and peripherals is one of the DSP function in the process of using which is the basic but important. This paper introduces a TMS320C6748 DSP with PC serial communication method based on the UART module. The hardware connection and software programming were highlights description. Finally, this paper gives some key code about TMS320C6748 DSP and PC serial communication programming.
Traffic Image Segmentation Based on Gaussian Mixture Model with Spatial Information and Sampling
Authors: Zhang Xiao Na , Yao Ming , Zhu Feng , Ni Jie
Published: August 2013

The application of classical gaussian mixture model to image segmentation has highly computer complexiton and have not taking into account spatial information except intensity values. A image segmentation based on Gaussian mixture model with sampling and spatially information is proposed in order to solve this problem. First, a spatial information function is defined as the neighbour information weighted class probabilities of very pixels; Secondly, the sampling theorem is given in this paper,and the size of the minimum sample has been derived according to the smallest cluster and cluster number; Finally, image pixels are sampled based on the size of the minimum sample to estimate the parameter of model , which are classifed to different clusters according to bayesian rules. The experimental results show the effectiveness of the algorithm.
Several Color Image Enhancement Method Comparison
Authors: Huang Ting Ting , Li Yuan , Xie Zhen Xiang
Published: August 2013

In this paper, the image analysis process, based on the characteristics of color images, were used histogram equalization, homomorphism filtering, Retinex multistage optimization and Zadeh-X transform for image processing, the use of simulation experiments, compared several methods in the image enhancement application, experimental results are presented and compared using several methods of objective evaluation.
Contrast Enhancement and Optimization for Image with Fog
Authors: Huang Wei Na , Xie Zheng Xiang
Published: August 2013

Aiming at the absorption effect of fog suspended in the atmosphere on light, the paper established the removing-fog compensation adaptive model which can improve the atmospheric visibility and restore the normal work of outdoor system. The experimental results show that the removing fog image processed by the method of removing-fog compensation optimization can accord with the requirement of human visual, and it can be used in real-time video monitoring as the fast computing speed. The method not only can be used in foggy video which the fog distributed uniformly, and can assess the visual quality for the images processed.
The FPGA Design and Implementation of Pipeline Image Processing in the GPU System
Authors: Wang Ke Nian , Du Hui Min
Published: August 2013

In the GPU system, pipeline image processing is facing the problem that a large amount of data to be processed, complicated processing procedure, more data transmission channels, and etc. All of these lead to low processing speed and large circuit area. This paper proposed a FPGA design of the pipeline image processing in GPU. The design has been implemented by foam extrusion pipeline architecture and validated on Xilinx Virtex XC6VLX550T FPGA. The results show that the consumption of resources is 390726.09 and the speed is 200MHz.
Ontology-Based Heterogeneous Data Integration Technology
Authors: Li Kang , Li Xin Ming , Liu Dong , Cui Yun Fei
Published: August 2013

For the vast amounts of heterogeneous data is difficult to effectively deal with the problem, propose an ontology-based data integration technology. Analysis of the types of semantic conflicts in data integration, ontology semantic description of traditional data integration framework for data integration middleware module. Ontology concept in the domain of information resources, and take the initiative to find and build semantic mapping between semantic conflicts.
Visual Detection Technology of the Driver's State of Fatigue Based on Multi-Information Fusion
Authors: Zhao Li Ming , Zou Yi Min
Published: August 2013

This paper attempts to combine the image features of shape, movement and color, taking the oval as the shape model of the target to immediately catch the edge of the target, using the feature light stream technology to obtain the movement information of the target. The color information can be obtained using the color histogram features of the target and mean shift algorithm. In the tracking of the color, SDA color spatial selection algorithm is introduced to improve the target and background differentiation. Then, the above information would be integrated through particle filtering technology. The self-adapting integration technology is used, and each image features weight would be decided according to its validity, thus, a quick and robust facial tracking algorithm is gained.
The Design of Concentrator Base the WIA Wireless Network
Authors: Huang Jian Long , Wang Zhong Feng , Wang Ying Nan , Ge Wei Chun , Li Li Gang
Published: August 2013

in connection with meter reading system of low-pressure line in the domestic. We propose a wireless meter reading which based on the network of GPRS and WIA. In this paper, we principal design the local wireless part of communication that works on downstream. It is able to read the data of meter by wireless network. It has advantage of real-time and low power consumption.
One Method of Urban Land Covers Information Extraction
Authors: Xing Da Peng
Published: August 2013

To study urban land cover information extracting method used one scene LANDSAT-TM remote sensing image of Chongqing city, China. Since NDVI calculation can enhance vegetation information, a calculation expression which is built according to water spectrum feather can enhance water information, and NDBI (Normalization Difference Building Index) calculation can enhance impervious surface information, the three calculations were used to get three thematic images, and after stacking them on to be one image, supervised classification used k-Nearest Neighbor algorithm based on Object-Oriented features of the image was used to get vegetation , water and impervious surface information. To value the final accuracy of the classification, 100 random sampling points were chosen and the high spatial resolution remote sensing image of Google Earth was taken to be the reference, the overall classification accuracy is 83.4%, and the Kappa statistic is 0.814.
Research on the Chaos Synchronization of Erbium-Doped Fiber Ring Laser
Authors: Lin Yu Ke
Published: August 2013

The accurate synchronization signal at the receiving end is obtained and chaos synchronization of two single ring laser is achieved through numerical simulation by master-slave method. It is founded that chaos synchronization of Erbium-doped fiber ring laser with master-slave can be realized and synchronization is unconcerned in initial system. These results will be useful to control and application of chaos in secret communication.
Research on a High Effective Algorithm of PRACH Baseband Signal in TD-LTE System
Authors: Chen Fa Tang , Xu Chi Yun
Published: August 2013

Random Access Procedure is a bridge between idle mode and connection mode in LTE system, and the algorithm of PRACH baseband signal we use will influence the performance of LTE system. A kind of High effective algorithm of PRACH baseband signal is introduced in this paper based on the research and analysis on the present PRACH baseband generation algorithm .By comparing and simulation, we find the algorithm introduced in this paper is feasible and effective. And this algorithm has been used in the RF conformance test system in LTE system.
Study and Implementation of a RFID-Based Electronic Medical Record System in Neonatal Department
Authors: Liu Chun Hua , Wang Kai Yan
Published: August 2013

Nowadays Radio Frequency Identification (RFID) technology is becoming more and more common in neonatal department. This paper proposes a patient Electronic Medical Record (EMR) System based on RFID technology in neonatal intensive care unit (NICU). The system is such a proactive step to enable fast sharing of medical information with the clinical staff and families and avoid human-based errors that it makes the management of the NICU more effective and efficient. Besides the system architecture and functions are described, the database design and several key features of the software development are introduced too.
An Identification Method of Harmonic Source in the Power System Based on Independent Component Analysis
Authors: Jiang Shan , Chen Min You , Lin Hao , Lv Zhi Sheng , Fu Ang
Published: August 2013

In this research, an identification method of harmonic source, based on independent component analysis, was proposed. An unknown harmonic source in the equivalent circuit of power system was regarded as the signal source in the independent component analysis. The known voltage and current of PCC were taken as observed quantities. The independent component analysis and the optimization algorithm were utilized to construct a matrix that could linearly transform voltage and current of PCC into mutually independent signal sources. The harmonic impedance and harmonic source of both the user side and system side were obtained. Then the contribution of users to the harmonic distortion at PCC could be identified. With a good anti-jamming property, this algorithm only needs a condition that variations in the harmonic voltage sources at system side and user side are independent to each other. Simulation results indicated the effectiveness of the method to identify the harmonic source of PCC.
Image Mosaics Algorithm Combined Feature Point Matching with Transformation Parameters
Authors: Qiu Peng Rui , Liang Ying , Rong Hui
Published: August 2013

To solve the problem of the large amount of calculation, poor robustness and do not well in image mosaic of images who are in different scales in the traditional image mosaic method ,the article arise a mosaic algorithm of different scales images registration and adaptive. Through feature point matching and automatically recognizing of transform geometric parameters between images,It achieves the match and mosaic of different scale and rotated images. First, using SIFT to extract the feature points of the images and matching feature points according to the principal of mutual information maximum. Then based on the geometric information of the matching pairs, automatically recognize the relationship of transformation parameters. In the end, obtain the projective transformation and achieve the image stable mosaic.
Research on Miniature Thermoplastic Processing of Polyvinyl Alcohol Based Nanocomposites
Authors: Xie Ming Fang , Qiang Sheng
Published: August 2013

This paper discusses the synthesis and preparation of polyvinyl alcohol based nanocomposites through the use of miniature thermoplastics processing technology. It studies the influence of different process conditions, the amount of raw materials and water on the processing performance, tensile strength and elongation at break of polyvinyl alcohol based nanocomposites. Studies have shown that using two miniature thermoplastic processes does not have much influence on the mechanical properties of polyvinyl alcohol based nanocomposites, different amount of polyvinyl alcohol will lead to enhancement of the tensile strength of the polyvinyl alcohol based nanocomposites system by the increasing amount of glycerin, and the water content has a great influence on the performance of polyvinyl alcohol based nanocomposites. To this end, according to the analysis of experimental results, it can obtain preparation conditions and influencing factors of polyvinyl alcohol based nanocomposites with the miniature thermoplastic processing conditions, and provide a new theoretical method and means for nanocomposites.
Influence for Brake Torque of Hydraulic Retarder with Shape of Circulation Circle
Authors: Chu Ya Xu , Lv Jin He
Published: August 2013

Based on CFD software platform, numerical simulation of 3-D with the internal characteristic of hydraulic retarder with different shape of circulation circle was simulated, and the RNG turbulence was adopted. Through the result show that under model circle shape of the shape of circulation circle of hydraulic retarder has the biggest static pressure and the fastest velocity magnititude and the biggest moment.
Analysis of the Development and Application of Rigid Polyurethane Foam Material
Authors: Liu Jia Sheng
Published: August 2013

Due to its excellent performance, the rigid polyurethane has been widely used in the building construction nowdays. This paper introduces what is rigid polyurethane foam and its main chemical constituents of the composition and principle, describes the main properties of rigid polyurethane foams and its present application status and development prospects, to provide reference for further development and research of the rigid polyurethane foam in the days to come.
Research on Scheme of the Continuous Casting Slab Internal Quality Inspection Based on BP Neural Network
Authors: Li Xin , Sun Jie , Xie Xiao Feng
Published: August 2013

The internal quality of continuous casting billet mainly refers to the low power structure, center segregation, inner crack and the levels of inclusions. It seriously affects the comprehensive performance of steel and rolling slab of the casting billet center segregation and crack existing. The influence rules of the slab internal quality about the process and the factors of equipment combining with field production data have been discussed in this paper. Then using the improved BP algorithm with added momentum item and the prediction model of central segregation of continuous casting billet base on BP artificial neural network have been built.
Energy Consumer Demand Predict of Hebei Province in the Domain of Low-Carbon Economy — Analysis Based on Gray Model GM (1,1)
Authors: Wang Ju Qin , Li Bao Lin
Published: August 2013

The face of the world economic development has transitioned to a low-carbon economy, in order to meet the dual challenges of climate change and scientific development, the development of low-carbon economy has become the reality of the development of key choice. In this background, based on energy consumption situation in Hebei Province,we use GM (1,1) gray prediction model to predict Hebei Provinces energy consumption and energy consumption structure in 2003-2010. Based on the analysis of the results, support from the policies, laws, and adjust the industrial structure, promote the three levels of the low-carbon concept has made a number of recommendations for the Hebei Province future energy planning and low-carbon development.
Service-Oriented Government Building Research Based on the Background of the “New SEZ”
Authors: Wang Ju Qin , Li Bao Lin
Published: August 2013

To build a service-oriented government is the general direction of the administrative reform in China. Its not only the remodeling of the relationship between government and the market and corporate. But also its a thorough transformation of government management mode. Especially in the new SEZ booming context, the construction of service-oriented government has increasingly become a central element of the comprehensive reform of the SEZ. By define the meaning of service-oriented and analysis the necessity and possibility of building a service-oriented government in the context of SEZ, and Combined with the SEZ development practice, it come up with a specific implementation path of Building service-oriented government in the context of the new SEZ from foster people-oriented concept, improve the legal system, the transformation of government functions, improve the overall quality of government officials. This article aims to provide a reference for the construction of the service-oriented government.
On the Existence of "Giffen Goods" again
Authors: Yu Su
Published: August 2013

Whether Giffen goods exist or not has long been a argument in economics academic circle. This paper analyzes and evaluates the two opposing arguing points represented by Zhang Wuchang and Wang Dingding. At the same time, through analyzing in depth the explanation offered by Hicks Decomposition to Giffen goods in economics textbook,the paper points out that Hicks Decomposition to Giffen goods is against the axiom of Diminishing Marginal Utility, so that Giffen good is not likely to exist in reality.
Public Participatory Risk Mapping for Community-Based Urban Disaster Mitigation
Authors: Jing Li , Liu Xue Mei , Gang Liu
Published: August 2013

As crises happen more frequently and in bigger magnitudes in urban communities, disaster prevention and disaster mitigation become increasingly more important. One useful preventive measure is for community members to report relevant risk information before an actual crisis occurs. This paper presents a Public Participation GIS (PPGIS) system called Collaborative Risk Map System (CRMS), which is community based and through which local residents can report risk information of crisis events and share the information in disaster mitigation. Although the Internet and mobile phones are the preferred methods for public participation due to their convenience and ease of use, the feedback information needs to be filtered before usage, so we designed a credibility model to filter out the mendacious information. A risk model of crisis events is also proposed which transformed the static pre-planning to dynamic and timely risk map as a result of public participation. The risk state of the community and reliable risk feedback is displayed on the map using Oracle Spatial technology so that public can see the risk information visually. Through the analysis of risk information, the community can directly access reliable risk information easily and can prepare for it immediately. Most importantly, decision-makers can get the most up-to-date risk information and do more accurate risk analysis so as to make better informed decisions. We demonstrate the prototype system by selecting 20 places to be a community in Chengguan district in Lanzhou, the capital city in Gansu Province, China and selecting fire risk to evaluate its effectiveness and efficiency.
Study on Sustainable Development of Highway Traffic in China
Authors: Zhang Chun Mei , Zhao Min , Zhai Lu Lu
Published: August 2013

Based on sustainable development,the Data Envelopment Analysis (DEA) with eight input indexes and four output indexes, was applied to evaluate the highway traffic sustainable development of 31 provinces in China. The result shows that the input and output of highway construction has reached the best combination at Beijing, Tianjin, Shanghai, and Tibet. GDP(Group Domestic Product) and social total retail sales of consumer goods can be improved by increasing input in eleven provinces. From the perspective of traffic safety,accident rates will be no major increase when the government enlarge investment of highway building in our country,These results imply that China is making strong progress in the road traffic environment.
An Assembly Scheduling Model for Complex Machine Product
Authors: Liu Sheng Hui , Zhang Shu Li , Xu Hong Bo
Published: August 2013

According to the characteristics of assembly scheduling, an assembly scheduling model for complex machine product was defined in this paper. The assembly relationship of a complex machine product is expressed by a job assembly graph. A job assembly graph is translated into an assembly process graph. The assembly process graph is a tree-form. There is a partial order between each child node and its parent in the assembly process graph. Then an assembly scheduling algorithm for complex machine product is given. The goal of the algorithm is minimizing total assembling time. The algorithm could always gain a good assembly schedule through minimizing the waiting time of all assembling operations. The feasibility and efficiency of the algorithm was verified through an example.
A Simulation of an Electrical Servo Drive Based on Optimal Control
Authors: Yang Xiu Qin , Zou Kai Feng
Published: August 2013

In paper, the problem of robustify LQR for a class of uncertain linear systems is considered. An optimal controller is designed for the nominal system and an integral sliding surface is constructed. The ideal sliding motion can minimize a given quadratic performance index, and the reaching phase, which is inherent in conventional sliding mode control, is completely eliminated. Then the sliding mode control law is synthesized to guarantee the reachability of the specified sliding surface. The system dynamics is global robust to uncertainties which satisfy matching conditions. A GROSMC is realized. To verify the effectiveness of the proposed scheme, a robust optimal sliding mode controller is developed for rotor position control of an electrical servo drive system.
Active Engine Vibration Isolation Using Robust Control
Authors: Sun Guo Chun , Zhang Chun Hua , Xin Hua
Published: August 2013

This paper introduces a prototype active engine mount (AEM) system designed for commercial passenger, requiring a good engine vibration solation performance. The AEM consists of a conventional hydraulic engine mount and an internal electromagnetic actuator. The robust H controller was adopted to cancel out the force transmitted through the AEM. The vibration isolation performance tests were carried out by simulating the engine idle shake. The experimental result confirmed that can control unwanted vibration from the engine operation by using active mounts.
Analysis of Kinematics and Throughput of the Shotcrete Machine
Authors: Feng Kai Lin , Zhang Guan , Wang Fei , Wang Bin
Published: August 2013

Shotcrete machines plunger displacement, velocity, acceleration, and the trajectory of swash plates ball socket are analysed according to the principle of working of shotcrete machine, using graphic analytic analysis of the shotcrete machines instantaneous and theoretical throughput according to the analysis of movement. The theoretical analysis for the design of the shotcrete machine can provide theory basis for improvement and perfect of shotcrete machine.
Force Analysis of Petticoat Valve of Shotcrete Machine Based on Fluent
Authors: Feng Kai Lin , Wang Fei , Zhang Guan , Li Jin
Published: August 2013

Petticoat valve is the key component of the concrete delivery system in the shotcrete machine. Its working conditions are very bad and it has to bear the delivering pressure, the severe wear of pebble and sand and the corrosion of cement and water. Based on the force analysis and simulation with Fluent software for petticoat valve, the pressure distribution can be obtained, which has the guiding significance for design and use of petticoat valve.
Simulation and Optimal Control of AMT Starting-up Process
Authors: Ren Li Na , Tang Na Na , Yue Han Qi , Gao Bing Zhao
Published: August 2013

For a vehicle with 5-speed AMT (Automated Manual Transmission), AMESim model of the powertrain is set up, and comparison of simulation and experimental values is carried out to test the reliability of the simulation model. Through the co-simulation of AMESim and Simulink, we use optimal control and PID control respectively to control the starting process. The simulation result indicates that the optimal control strategy can satisfy the requirement for the drivability and smoothness.
A Pilot Translational Motion Perception Model
Authors: Song Li Li
Published: August 2013

The main objective of this paper is to develop a pilot translational motion perception model that can be used in flight simulator fidelity evaluation .This paper provides detailed design process to pilot translational motion perception model with visually induced self-motion and canal-otolith interaction.This study considers the effects of visually induced self-motion and canal-otolith interaction to pilot motion perception at one time . The pilot motion mode has more fidelity than others.
Cooperation-Based Explicit Distributed Model Predictive Control
Authors: Zhong Guo Qi , Liu Zhi Yuan
Published: August 2013

in this paper, an explicit distributed model predictive control method for a class of linear system with control information coupling by means of multi-parametric programming is established. In order to get close to the optimal performance of centralized MPC, the method is based on cooperation, which solving weighted global cost instead of local ones. The method is employed on distillation column control problem to verify the efficiency.
Research on Job Shop Scheduling Technique in Small-Scale Machine Production
Authors: Zhang Shu Li , Liu Sheng Hui
Published: August 2013

According to the characteristics of the small-scale machine production, a job shop scheduling technique was given in this paper. In the technique, two classes of queues were built. The job queue expresses the procedures of a job. The machine queue expresses the actual processing sequence of the jobs on a machine. At first, all job queues could be built and the sequence of the operations in them should not be changed forever; all machine queues are null. The completion rate of each operation is defined. The core task of the technique are prioritizing the operation which the completion rate is the smallest of the job queues inserting into a machine queue, and minimize the finish time of the last operation in all machine. The technique could always achieve good job shop schedules. The feasibility and availability of the technique is verified through an example.
Design and Implementation of Wireless Channel Test System of UAV
Authors: Jun Luo , Jun Lu Wen , Fei Ye , Xi Sun Shuang , Hui Pe Dong
Published: August 2013

UAV wireless channel is the core of their communications systems, this paper designed a stepper adjustable independently programmable power attenuation device and contains three functional subsystems to achieve a radio channel test equipment for testing wireless channel launch power attenuation, receiver sensitivity and receiver bit error rate and other key technical indicators.
Remote Real-Time ECG Monitoring System Based on 3G Network
Authors: Zhang Yin Yang , Sun Jie , Zhao Chun Chen
Published: August 2013

In order to meet the flexibility and real-time of the remote ECG monitoring system and other application requirements, a design proposal of a remote real-time ECG monitoring system based on 3G chip is presented in this paper. ARM9-based embedded control chip S3C2440 is chosen as the core and 3G module SIM5218 embedded TCP / IP protocol stack is used to transmit ECG data of the system which has functions of displaying the real-time ECG waveform and alarming. Thus, the real-time transmission of the large ECG data from the user to the monitoring center has been accomplished in this system. The research of the system provides convenience for the timely rescue of patients with cardiovascular disease.
Modeling and Analysis of High-Speed Journal Bearing Based on Thermal Hydrodynamic Lubrication Theory
Authors: Li Song Sheng , Lu Yu Xin , Dong Ma Li , Shao Juan , Yu Feng
Published: August 2013

Journal bearing in high-speed working conditions will generate a lot of heat, which affects its working performance. Based on hydrodynamic lubrication theory, a model of the thermal hydrodynamic lubrication was built, and the distributions of temperatures and pressures of the oil film were obtained from the simultaneous solution of generalized Reynolds, energy and viscosity-temperature equations. The results show that the temperature will increase and the pressure decrease of the lubrication oil film with the rising of the rotating speed, which will make the the bearing capacity decrease. Compared with the traditional isothermal model, the thermal hydrodynamic lubrication model is more consistent with the engineering practice.
Development of the Real-Time Measuring System Based on Video Image
Authors: Zhang Ming Hui , Zhang Yao Yu
Published: August 2013

A new real-time measuring system based on video image is developed in this paper. By using the self-collimating collimator, the reflex light-tube and other devices installed on deck, the bi-dimensional dynamic distortion can be achieved by the video interpretation system. The video interpretation system incepts two video signals coming from two CCD of photoelectric self-collimation parallel optic equipment. Real-time video image processing and interpretation, as well as dynamic miss distance are achieved by using concurrent working mode, and the relative distortion of vessel can be obtained by combining the two measurement results.
Precise Attitude Determination of Ship Based on Star Sensor
Authors: Liu Bing , Chen Feng , Zhang Tong Shuang , Zhong Dean , Yang Lei , Mao Yong Xing
Published: August 2013

This paper analyses the attitude measured model and presents the attitude determination algorithm of space TT&C ship (space tracking, telemetry, and command ship) based on single star sensor. Considering lower precision of rolling angel for single star sensor, we proposed an algorithm by integrating attitude determination and redundancy measure to obtain high precision ship attitude data. Aiming at the circumstance of space TT&C ship, the factors that influence the precision of attitude measured data such as the number of star, atmosphere refraction correct and installation elevation are analyzed, which this can provide valuable references to the engineering design for star sensor used on space TT&C ship.
The Composite Method of Torque Ripple Restraining in Brushless DC Motor
Authors: Pan Hai Peng , Gu Jun Jie , Gu Min Ming
Published: August 2013

Brushless DC motor generates parasitic torque ripple owing to its physical structure. The consequences deteriorate the performance of the drive in demanding applications. The mathematical model is analyzed. A fast toque control system employed which combines the current compensation and PWM_ON_PWM modulation. The effectiveness of the adaptive torque ripple compensation is demonstrated by experiments which is better than its using PWM_ON_PWM alone.
Research of Practical Solar Energy Intelligent Regulated Power Supply
Authors: Cheng Hong Li , Zhang Wei , Zhang Geng Chuan
Published: August 2013

A solar-powered fuzzy PID control based DC/DC series the LDO method is suggested to take advantage of the performance of the DC/DC converter high efficiency while reduce the output ripple and low voltage is continuously adjustable. Fuzzy PID control according to the error of sampling the output voltage and the desired output voltage, the DC/DC output and LDO output with constant pressure difference control. The circuit structure, the dynamic response of output voltage in the process of abrupt change of load and starting is analyzed. Parameter selection and design considerations are given. A BUCK converter is used as an example to show the design steps. Simulation study are made on the supply, the results of which show that method is feasible
Research on the Positioning Algorithm of BD/GPS Integrated Navigation System
Authors: Luo Hai Ying , Wang Qi , Li Qiang , Liu Guang Jun
Published: August 2013

The BD satellite navigation and positioning system (BDS) is a new generation of satellite navigation and positioning system developed by China independently. In order to get rid of the long-term reliance on the GPS system, research on the BD/GPS integrated navigation positioning algorithm is both inevitable and necessary, and analysis of the BD/GPS integrated navigation positioning accuracy is of great significance for the navigation and positioning applications. In this paper, the basic principles of the integrated navigation and positioning, observation equations and positioning algorithms were expounded, and the least squares algorithm was used to accomplish the positioning calculation. Base on the analysis of Positioning results, the integrated navigation and positioning accuracy of BD/GPS was given. The research results are importance to the application of the BD system.
Finite Element Analysis of Drill Tower Structure Based on ANSYS
Authors: Chen Ji Tao , Song Hai Yan , Ge Wei Wei , Li Yuan Yuan
Published: August 2013

Drill tower is the support structure to ensure normal work for drilling, and the structural characteristic has been played a vital role in the stability of drilling rig. In the paper, the 3-D modeling of the drill tower has been established by the software UG and the finite element analysis of the structure has been finished by software ANSYS that it provides a new design method and thought for the new type of electro-hydraulic controlling core drill tower. According to the analysis result, the practicability for the structure is discussed, and furthermore, this study can provide reliable and efficient technical reference for future design of drill tower products.
A Ku-Band Wideband Power Divider with Defected Ground Structure
Authors: Han Xu , Xu Jian Hua
Published: August 2013

A planar power divider operating over the whole Ku-band is presented. The proposed device utilizes a T-microstrip junction combined with defected ground structure and an elliptical patch at the centre of the T-junction. An isolation resistor is connected across the slotted ground plane. The simulated results of the divider show equal power split, insertion loss is less than 0.3dB, return loss of all ports are better than 15dB, and isolation is better than 15dB over the whole Ku-band.