bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Realization of a CAN Network Development and Analysis Tool
Authors: Sun Rui , Wang Yong , Li Shao Peng
Published: November 2013

With the large-scale promotion and application of CAN bus in automotive electronics, a set software tool supporting the development, analysis and test of CAN bus network is required for the design of CAN network and single automotive electronic unit. Since the CAN bus development and analysis tool adopted by the buyer is quite expensive and it should be bonded to specific CAN card, it is not applicable for parallel development. The team of the author realized a low-cost CAN network development and analysis tool with Java and JNI by taking Eclipse as the development platform. The tool mainly includes two parts, namely the networking protocol design tool and bus monitoring tool. The former realizes the design of signal matrix, provides several views for the network signal, and generates XML signal matrix as the interface of bus monitoring tool; while the latter realizes the control and interface of ordinary CAN card, which will carry out the real-time monitor of bus data and provide several views of the data for further analysis through connecting CAN card to the CAN bus network.
Remote Update on Flash-Based Hydrologic Remote Terminal through GPRS Technology
Authors: Ji Wen Jie , Li Xiao Qiong , Chen Jing Yang
Published: November 2013

Mountain torrent is one of major natural disasters for humans. With the development of the Internet of things, the instrumented terminals, through which the host PC could obtain the real-time water and rainfall information and could alert to a coming disaster, have been widely applied to mountain torrent warning system. In order to ensure the effectiveness of network alerting, the program in the terminals need to be updated for some specific situations, but large quantities of terminals are usually built in complex terrain and fragmented geographically, so that it is difficult and expensive to update or repair the programs. In this paper, a method of remote update, realized on the BAM-4300 hydrologic remote terminal to update the complex programs via GPRS modules, was highly reliable. Experiments show that this method is of safety and reliability, and cumbersome processes of onsite update and maintenance could be avoided.
A Proposal for a Simplified Database Access Framework Based on DAO.NET
Authors: Gu Rui , Chen Jia , Gu Min
Published: November 2013

A simplified database access framework, which originated from a vehicle tracking system, is introduced. This framework is developed on Microsoft .NET platform and uses DAO.NET as the supporting technology. Meanwhile, Design Patterns [ were adopted in analyzing, designing and developing. The platform not only works effectively as a data-accessing layer for the vehicle tracking system, but also realized the idea of linking to the database once, using for many times. The platform reduces the cost of database connection initialization and accelerates the responding speed to users.
Application of Operation Anesthesia Information Management System in Hospital
Authors: Lu Yang , Wu Yang , Zhang Yan Yi , Hou Lin Lin , Shi Jin Chi , Ren Li Qun , Wu Ya Ping , Pan Shao Dong
Published: November 2013

with the rapid development of modern medical technology, computer aided medical system has been widely used in clinical to make the hospital informationization and the network level gets great developed. Anesthesia records as one of the most vital patient operation treatment information is still listed as information systems and most of all is manual recorded even though the hospital information system has been widely used in modern health care. This paper focuses on the introduction and discussion of the application of operation anesthesia information management system in hospitals; realize the whole process of operation anesthesia dynamic tracking and electronic information. To make the operation room management mode is more scientific and practical; achieved to share the medical information data and information system
Practice and Exploration of Remote Access to Digital Resources in Libraries
Authors: Luo Yong Сheng , Jiang Ya Qian , Xue Wen Liang
Published: November 2013

Remote access to digital resources system is widely used in college, but its service mode and function are worth further investigation. This paper first analyzes the advantages and disadvantages of mainstream technology. Then it explores several problems that should be pay attention in constructing and implementing the remote access service at this stage. Finally, it introduces the solution of digital resources' unified management system in Donghua University Library, which considers two aspects of management and readers' use. It also proposes this can solve the blocked problem of authorized IP addresses caused by readers' misusing database.
Cloud Computing Architecture and Application in College Teaching
Authors: Liu Yan Fei , Lin Shi Jia , Cheng Xiao Fei
Published: November 2013

The conception of cloud computing is introduced. Three service models of clouding computing are described, and the characteristics of clouding computing are analyzed. Basing on these characteristics, clouding computing architecture and application is framed in college teaching from the following three aspects: providing the collaboration study making use of cloud service (Take Google cooperation platform as an example); How to build cloud computing model of teaching (Take rendering course as example ); How to put up cloud computing model of computer room managing. Cloud computing minimizes the demand for terminal, and also provides convenience for students to study anytime and anywhere.
Weighted Hybrid Defect Content and Effectiveness Model
Authors: Zhang Hua Yin , Ding Jian Long
Published: November 2013

Requirements analysis phase is an important step which is at the earliest stage of a software lifecycle. If defects are found out at early stage, the cost of a project can be considerably minimized. A weighted method with higher accuracy is developed, based on a Hybrid Defect Content and Effectiveness Model (HDCE) used at requirements analysis phase. In this model, the defects of requirements are classified and every level has different weight value. Moreover, comparison of actual case data clearly indicates that prediction made from this model is more accurate than the prediction made from just using historical data model.
Design and Implementation of the JSP Technology-Based Foreign Language Digital Libraries
Authors: Zhang Qing Song
Published: November 2013

This paper introduced the design process and function realization of the foreign language digital library. The system took Brower/server as web access model, Tomcat as Web server and SQL Server 2000 as data access software. The web function implement of system was developed by using the technique of JSP and JDBC.
The Design and Development of a Sci-Tech Information Sharing Platform for Chongming Science and Technology Support
Authors: Lin Yi , Shou Qing Yun , Si Hui Ping , Gao Jun , Wang Feng
Published: November 2013

Form 2004, Shanghai has started the corresponding Science and technology support program for the construction of Chongming eco-island. With eight years of continuous special support, it has a series of noticeable effects. Facing the problem of asymmetry of Sci-techl information, inability to realize Sci-Tech data compilation and sharing, and slowness of transferring scientific achievement into productivity, to establish a Sci-tech information sharing platform is very important for realizing the technical swift communication and authentic sharing. This study elaborated the design and development of the platform, the establishment of the database, the visual query and browsing technique, application of WebGIS and platform safety strategy. The Sic-tech information sharing platform includes all Sic-tech projects of Chongming special fund and all corresponding key technology and results based on Web page. Meanwhile, it provides strong related search functions for different users. The platform has entered a practical using and comes into great effect gradually.
In the Internet of Things about Theory of Real-Time Information and Real-Time Information Access
Authors: He Hong Yu
Published: November 2013

The Internet of things is a new kind of application technology. It is the extension and expansion of Internet technology. The real-time information theory in the Internet of things promotes the development of China's industry, agriculture and military aspects. Therefore, we should strengthen the study of Internet of things real-time information access problems. This paper introduces the Internet of things, the Internet of things real-time information meaning and basic characteristic, and further discusses the related application of the Internet of things real-time information in detail. It researches the advantages and disadvantages of different access path of the Internet of things real-time information, and tries to explore a way which is conducive to the further development of the Internet of things real-time information theory.
Preparation of CIP/SiO2/PANI Composites and Design of Electromagnetic Wave Absorption Coating in X-Band
Authors: Wang Ming Ming , Hao Wan Jun , Zhang Zhong Lun , Hou Guo Yan , Xin Zhi Jun , Wu Fan , Yi Ying Ying
Published: November 2013

CIP particles first have been coated with SiO2 shell by a Stober process , then grafted the polyaniline by in-situ polymerization to prepare CIP/SiO2/PANI core-shell composites, and the composites are composed the dielectric loss properties with the magnetic loss properties. It is observed that PANI are on the surface of CIP/SiO2 particles from the SEM image, XRD patterns further confirm that the CIP/SiO2/PANI composites are synthesized successfully. In comparison with CIP, the complex permittivity of CIP/SiO2/PANI composites have certain enhancement in 8-12 GHz frequency range, but it has a very small impact on the complex permeability. On the basis of the Electromagnetic Wave Absorbing Theory, the composites could prepare high-performance absorbing coating based on λ/4 type design, and the coating is below-10dB in the whole X-band, which could be used for architectural space electromagnetic radiation protection.
Design for Smart Monitoring and Control System of Wind Power Plants
Authors: Zhang Xiang Wen , Chen Ran , Wang Chun
Published: November 2013

The paper analyzes the current wind power plants monitoring system problems and the impact on the grid. Proposed structure for smart monitoring system of wind power plants based on IEC61400-25 and IEC61850.The system uses three level of station level and bay level and process level. System uses information modeling of object-oriented approach for wind power plants. Using maps to IEC61850-8-1 MMS protocol stack communication service mapping is proposed. Wind power plants monitoring system and substation monitoring system uses the integrated design.
Simulation Research of Fuzzy Controller with Sigmoid Scaling Factor
Authors: Wang Hui Fang , Liang Xiao Ming , Liu Zi Yu
Published: November 2013

For the fuzzy controller performance optimization, several optimization strategies on the membership function, control rules and scaling factors respectively are analyzed and compared, on the basis, the sigmoid function is introduced to replace the linear factor so to optimize the conventional fuzzy controller. The theoretical analysis is carried from mapping relations of sigmoid scaling factor and relations between it and the other parameters. It is shown that sigmoid scaling factor can get the same control effect to adjusting control rules or membership function. It can ensure the dynamic performance and at the same time effectively reduce the steady-state error, but the adjusting parameter is far less than the other strategies, it is easy and feasible.
Design for Irrigation Control System Based on ZigBee Wireless Network
Authors: Wang Xin , Pan He , Yang Jian , Liu Zhi Gang
Published: November 2013

Aimed at the shortage water resources and demand for water-saving irrigation in our country, this paper puts forward an irrigation control system realization method by using wireless sensor network on the basis of Zigbee wireless network. And then, this paper shows the specific implementation details. Through the preliminary experiments, it has been proved that this system can accurately obtain data from network node. Besides, the system is stable so that it has certain application value.
Research on the Application of Intelligent Decoupling Control Method in the Process Control System
Authors: Qin Jian , Wei Chun Guang
Published: November 2013

There is a universal coupling in process control system, especially with the development of science and technology, industry system has became more and more big, the control process is more complicated, the variables which need to solve are also gradually increased. Therefore between the variables in the associated process produce coupling. In order to solve the coupling problems, we introduced PI self-adjusting fuzzy control model in the link of decoupling, and designed the model and the algorithm of decoupling with decoupling controller. The experiment showed that, after the introduction of PI algorithm, the time when the system reaches a steady is greatly reduced, saving time and cost. Also there is no coupling between the two signals, which shows that PI algorithm successfully reaches the decoupling in the process control.
VAV Air-Conditioning System Control Using Neural Network Based MPC
Authors: Jia Xiao Long , Zhao Min , Jiang Yan Xia
Published: November 2013

Air conditioning system is known as a multi-variable, large delay, nonlinear and uncertain system, and it is difficult to achieve the ideal performance by using the traditional PID control strategy. In order to improve the system performance and reduce energy consumption at the same time, a neural network based MPC controller is proposed in this paper. After establishing the predictive model by using neural networks based on experiment data, the online optimization programming method is utilized to produce the control sequence of the future. And only the first control law is applied to the system to improve the control effect. The simulation result at last shows that the proposed strategy has strong robustness and adaptive ability, high control precision, better and reliable control effect and other advantages.
Integration Method and Test of IEC 61850 Client in Integrated Supervision and Control System of Substation
Authors: Wang De Wen , Ge Liang , Liu Ru Kun
Published: November 2013

Currently, the information exchange between various systems in substation is difficult, and the scheme of integrated supervision and control system of substation can effectively promote the smooth flow of information in the substation. In this paper, by analyzing the Communication architecture of integrated supervision and control system, the devices that communicate following the IEC61850 standard in station layer are given, which all need to integrate IEC61850 client. Then an integration method of IEC61850 client is proposed, providing unified IEC61850 client for different devices in integrated supervision and control system of substation to reduce the risk of interoperability failure because of using different IEC61850 clients. While a communication test is conducted using IED simulator and communication gateway simulator to verify the feasibility of the proposed integration method.
The Development of the Remote Wireless Monitoring Device for Toxic Gases
Authors: Wu Da , Zhu Ling Qiao , Tang Jun , Jiang Tao , Li Zhi Min , Chen Xiang Guang
Published: November 2013

For the scene where there is a toxic gas leak, in order to detect the gas quickly and safely and make the effective solutions, the project of monitoring toxic gases in a remote wireless way and the process of the development is proposed in this paper. The device developed in this paper includes several wireless sensor network (WSN) nodes and one hand-held terminal, and the sensor module of WSN node is composed of several chemical gas sensors. The nodes will be sent to the scene by ground robots or unmanned aerial vehicles and make up the WSN monitoring system automatically, to achieve an aim of monitoring the toxic gas in real time. The experiment results show that the device can deal with the emergencies about the leak of toxic gas efficiently. And it has the advantages of low power consumption, high cost performance, self-forming network, anti-interference. Its suitable to monitor the toxic gas in various environments of industrial production and chemical scene of accident and unexpected occasions where there is a leak of toxic gas.
A Novel Planar Dipole Antenna with Distributed Inductive Load for Size Reduction
Authors: Gong Bing , Li Rui , Zhao Shang Hong , Shi Lei , Zhang Huan Mei
Published: November 2013

A technique is employed to reduce the size of planar dipole. The technique is consists of adding short-ended microstrip line at the top of the dipole, making the structure be inductive load, and as a result, increase the effective length. A design example for the ISM band is presented. The configuration reduces the resonance frequency of the planar dipole by 25.8% without degrading influence on antenna performance. The antenna comprising of only a single layer planar in additional to the microstrip feed line offers over a S11<-10dB bandwidth from 2.4GHz to 2.4835GHz which is wide enough to cover WLAN, BLUETOOTH, RFID, and WIFI communication bands. With this reduced size and omnidirectional pattern, it is very suitable for narrow band systems such as: WCDMA, WiMAX, among others.
The Influence of Marine Environment to the Electromagnetic Field on the Wireless Network Communication
Authors: Qiu Wen Yuan , Jin Xin Yu , Wu Duan Po
Published: November 2013

It is one of the important technologies to realize the wireless network communication in the special marine environment. The fog that contains salt and water above the surface of the sea has certain influence on the attenuation of electromagnetic field in the wireless communication. The attenuation coefficient of electromagnetic wave in such medium is discussed in this paper, by replacing the permittivity of the salty fog with that of the NaCl solution. And then such attenuation coefficient will be introduced to the electromagnetic fading model with the sight considered. Finally, this paper designs a electromagnetic wave attenuation model of the sea, which could provide some suggestions for establishing wireless communication network on the sea.
The Design of High Power DC/DC Boost Converter
Authors: Feng Ren Bin , Wang Hui , Zhao Xiao Long
Published: November 2013

This paper analyzed several kinds of isolating DC/DC boost converting circuit. Choose isolating boost full bridge circuit as the main circuit of the DC/DC converter according to the designing requirements. Design the advanced isolating boost converting circuit, and use synchronous rectification in the full bridge rectifying circuit linked to the secondary side of the transformer to reduce the power loss of the main circuit and improve the overall efficiency. Analyze the working principle of the main circuit and the simulation mode. Considering the converter has to deal with huge power and current stress, this paper give instructions on the device selection and design method, including the selection of the lock-in tube MOSFET and transformer of the main circuit. At last, simulation of the system is run by using saber, which proves the theoretical analysis to be reasonable and correct.
The Kinematics Simulation and Analysis of the Multilayer Carbon Fiber Loom's Beating-Up Mechanism in ADAMS
Authors: Yang Kai , Yang Jian Cheng , Qin Jian Feng , Wang Hua Qing , Bai Yu , Hu Shuang Hu , Jiang Xiu Ming
Published: November 2013

This article designs a new set of beating-up mechanism for the multilayer angle interlocking construction loom based on the requirements of special material of carbon fiber and weaving technology,and it can battening 30 layers carbon fiber at a beating-up.Through building the 3D solid models for linkage mechanism in SolidWorks, it show that the beating-up mechanism Run smoothly by the kinematics and dynamics analysis of different beating-up rule in ADAMS.
An ICA and AIS Based Method for Electromagnetic Compatibility Analysis
Authors: Zhao Di , Lu Yu Heng , Li Hong Yi
Published: November 2013

This paper proposes a novel approach for analyzing and predicting electromagnetic compatibility (EMC). The proposed method mainly consists of two parts. First, we separate input mixed signals from an electromagnetic environment by using fastICA, based on which, subsequently, we train a immune evolutionary network classifier (IENC). The classifier then finally could be used to analysis and predict electromagnetic compatibility. Experimental results have demonstrated the validity of the proposed algorithm.
Research of Test Model for Eggshell Crack Detection
Authors: Yang Jian , Xia Chun Yan , Pan He , Shi Ying , Li Xiu Ying
Published: November 2013

In order to realize the precise identification of eggshell crack, we design eggshell cracks detection method based on image processing and fuzzy neural network. Firstly this method gets two pieces image of eggs and processes, and then counts number of the same gray pixel. Determine five characteristic parameters as the input of fuzzy neural network. Set up a fuzzy neural network. Its structure is 5-10-1. Eggshell cracks and noise in egg images were distinguished using automatically learning and inference rules of fuzzy neural network. Use 147 groups of parameters for training network and rest 58 sample for verifying. Experimental result shows that the model can meet actual testing requirements with fast, stable, high precision and good robustness, easy to implement. Its precision reached 94.55%.
Wireless Sensor Nodes Design Based on ADSP-BF533
Authors: Zhan Hua Lin , Lai Xiao Chun
Published: November 2013

This paper introduces design and realization of wireless sensor nodes by ADI Co.,Ltd wireless transceiver chip ADF7025 based on high-performance processor ADSP-BF533 [1] and embedded OS uClinux [[3]. Using dual-threaded technology realizes Communication from semi-duplex to full duplex in the driver, mass data transmit and receive by the method of packing and unpacking. This paper scheme has already been used in a wireless sense network.
Wireless Backhaul Technology in Monitoring System for Subway OTN+WiMax
Authors: Feng Xian Jie
Published: November 2013

In the OTN+WiMax control system of Metro, the use of wireless backhaul can reduce costs and increase security. This paper presented a variety of OTN+WiMax hardware solution for Metro monitoring systems for wireless backhaul system by comparing the variety of chips; For WiMAX, Wi-Fi coexisting wireless backhaul situation, we put forward the hardware design using low-power high-speed chip of Infineon's SMARTi hardware design,, and pointed out that the design programme belongs to energy-saving green environmental. Also we used Intel WiMAX Connection 2,400 chip design hardware programme of wireless backhaul system for monitoring. At last, The software radio technology is applied to wireless backhaul system.
Design Research of Optical Fiber Sensor Based on Reflective Intensity-Type Optical Sensing
Authors: Chen Jia Yin , Liu Guo Jun , Wang Jiang An
Published: November 2013

The paper conducts optimal design for reflective intensity-type optical sensing. It designs two holes on the back of sensor probe which reduces system damping due to diaphragm and space air. It sets reference circuit and realizes the light intensity compensation by the way of comparing ratio specific value of measuring circuit and reference circuit. According to the symmetry requirement of photoelectric detection circuit, the paper designs photoelectric detection treatment circuit. The experiment shows that intensity compensation method can compensate well the power fluctuation of light source and temperature drift caused by long-time operation of sensor.
A Deformation Measurement for Withered Plant Leaf Based on Vision
Authors: Hu Zhong Yi
Published: November 2013

If plants absorb too little water and the cells in plant leaves is not full, there might exist atrophy characteristic distortion of the cell concentration of leaf and leaf morphological characteristic. Traditional algorithm carries out deformation measurement for withered leaf based on cell concentration characteristics and leaf morphological characteristics. Once the character distorted, characteristic parameters of leaf cell sap will be inaccurate reducing the measurement accuracy for withered leaf deformation. Therefore, we propose a computer vision-based plant leaves wilt deformation measurement method. The experimental results show that this algorithm significantly improves the accuracy of the measurement.
A New Design of Portable EEG Signal Acquisition System
Authors: Li Yong Xiang , Li Nian Qiang , Liu Yang
Published: November 2013

Most of the electroencephalograph (EEG) acquisition systems use group of high precision electrical signal amplifier to record and analysis. But the huge input circuit and testing time is difficult to application for portable devices. In this paper, a new design of portable EEG signal acquisition system is designed. This paper presents an effective chip (ADS1299) implementation of an eight-channel EEG signal acquisition. Compared with the existing system, this design greatly simplifies the front-end circuits and improves the common mode rejection ratio (CMRR). The system has the features of high integration density, good flexibility and practicability. It is in line with the development trend of modern EEG, and meets the new requirements of modern EEG.
An N-Bit DAC with Adjustable Precision and Range
Authors: Wu Zhang Yu , Wang Xian , Wu Ye Hui , Que Long Cheng
Published: November 2013

Now some special circuits need higher precision in relatively fixed range. While the precision of a common digital-to-analog converter (DAC) is equidistant, which means the higher the precision is, the greater the number of bits. The increase of number of bits will slow down the speed of converter. This architecture we present here aims at finding a way of solving the problem. It uses M bits of the N-bit DAC to adjust precision by changing the current of the voltage division circuit, which alters the range of the DAC to a certain extent.
Research on Prediction of Egg Freshness Based on Improved GRNN
Authors: Yang Jian , Shi Ying , Li Xiu Ying , Wang Xin , Yin Ying Ying
Published: November 2013

The purpose of this paper is to add Particle Swarm Optimization algorithm to Generalized Regression Neural Network for predicting egg Haugh value and evaluating freshness degree of eggs. Firstly process the egg images with light-transmitting were obtained by the computer vision device including denoising, threshold segmentation, conversing HSI Color model and calculating the averages of hue, saturation, and intensity in the center of the image. Secondly analyze GRNN, and then particle swarm algorithm to optimize according to the predicted formula being derived. Thirdly train Improved GRNN and predicate Haugh value by HSI parameter data as the sample. The value of residual errors of Improved GRNN model are 6.38, the correct discerning rate of grading table eggs is 91.2%. It proves better than traditional BP neural network in terms of predicted accuracy and robustness.
Application Situation of Distributed Optical Fiber Temperature Measurement Technology in Power System
Authors: Li Xiao Juan , Xie Zhi Yong , Liang Xiao Bin , Zhao Xian Long , Chen Ze Gui
Published: November 2013

Temperature is an important operating parameter of electrical equipment, electrical equipment operating condition obtained by monitoring the temperature information has become research focus for power system fault prediction and diagnosis[1-. Distributed fiber optic temperature measurement system is a method for real-time measurement of the spatial distribution of temperature field sensing system. The system uses optical time domain reflectometer (OTDR) and laser Raman spectroscopy, amplifies temperature information and processes signal from wavelength division multiplexer and optical detectors, then the temperature information is displayed in real time[4-. Distributed fiber optic temperature measurement technology has several characteristics with insulation, anti-electromagnetic interference, resistance to high voltage, resistance to chemical corrosion, and security[6-. This article outlines the basic power system temperature monitoring content, studies the current distributed optical fiber temperature measurement technology applications in power system and prospects for its development trend.
Recursive Solution to a Type of Finite Field Matrix Equation and its Application in Information Security
Authors: Yan Shen Hai , Huang Xian Tong
Published: November 2013

On the question of solving lower triangular matrices or symmetric matrix by a type of matrix equation, we obtain the necessary and sufficient conditions for its only solution and design a recursive algorithm to compute the solution. With finite domain multiplicative inverse technology and Differ-Hellman protocol, a new cryptosystem is designed based on finite fields matrix equations. Numerical experiments demonstrate the correctness of the new cryptosystem and feasibility.
Comparison of the Image Encryption Effects Based on Different Unary Polynomial Transformation Chaos
Authors: Chen Hong , Wu Ling , Gu Shu Bin , Ding Qun
Published: November 2013

When the chaos is degenerating, the unary polynomial transformation can make the chaotic signal more complicated. Therefore, the transformed chaotic signal is more suitable for image encryption. In this paper, the image is respectively encrypted by the chaotic signal transformed by different unary polynomials and the chaotic signal without transformation. And then their encryption effects are compared and analyzed by various criteria. Experiments and research results indicate that, after unary polynomial transformation, the effect of chaos-based image encryption is improved. Furthermore, different unary polynomials have different effects on the cipher image. It can make the effect of image encryption better by changing the form of unary polynomial.
A Robust Boundary Localization for Degraded Iris Images
Authors: Li Tian Ping , Wang Xiao Wei
Published: November 2013

Boundary localization is one of the key issues for reliable iris recognition system. For degraded iris images, some frequently-occurred cases such as dominant texture patterns, eyelashes or eyelids occlusions, low contrast between iris and sclera, and pupil deviation, will lead to inaccurate boundary localization. Specifically, if the intensive transition from iris to sclera is too smooth, outer boundary localization will be very difficult. To stress the problem, in this paper the boundary localization method is proposed in which nonlinear gray-level transformation is innovated in outer boundary localization process. The experimental results depict that our algorithm have improved the localization accuracy for degraded iris compared to the classical algorithms.
A Method of Digital Halftoning through Approximated Optimization of Scale-Related
Authors: He Zi Fen , Zhang Yin Hui
Published: November 2013

We gain the scale-related characterization of the original image using the discrete wavelet transform. The boundary information of the image target is fused by the wavelet coefficients of the correlation between wavelet transform layer, which to increase the pixel resolution scale. We apply the inter-scale fusion method to gain fusion coefficient of the fine-scale, which take into account the detail of the image and approximate information, which the fusion coefficient are referred to as the weighting operator and to establish the boundary energy function. In the halftone process, each clustering uses the weighted least-squares method through energy minimization via Direct Binary Search algorithm, which to gain halftoning image. Simulation results on typical test images further confirm the performance of the new approach.
Properties of High Pressure Water Hydraulic Components with Modern Coatings
Authors: Pobędza Janusz , Sobczyk Andrzej
Published: November 2013

Water hydraulics is coming back as an alternative to oil and other not environment friendly working fluids used in a very wide range of fluid drive and control systems. The cost of water resistant materials for components is one of the barriers preventing the wide use of water hydraulics, especially moving parts such as pump pistons, surface of cylinder tubes and rods, poppet and seats, etc. to avoid corrosion. One of the common solutions is to use stainless steel there, where it can cooperate with other nonmetallic material such as plastic or other noncorrosive metallic composite to reduce friction. Thus some of research was directed to elaboration of special coating for covering surfaces in critical regions of water hydraulic components. The paper describes results of pilot research on selected components where such coating were introduced on regular carbon steel parts, same as used for oil hydraulics. First part of the article contents description of coating technology and some characteristics of coating layers. Second quotes selected results of conducted by authors research on coated hydraulic cylinders and poppet valves.
Modeling of Flow Curve at High Temperature for a Ti-6Al-4V Alloy
Authors: Porntadawit Jiranuwat , Uthaisangsuk Viton , Choungthong Paiboon
Published: November 2013

Titanium alloy grade Ti-6Al-4V has been widely applied for many applications such as aircraft structural components, machine parts, and parts for medical equipments. To understand deformation behavior and microstructure evolution of the material during hot forming process is significant for achieving desired dimension and final mechanical properties of a product. In this study, stress-strain responses of the Ti-6Al-4V alloy were investigated using hot compression tests at different temperatures and strain rates. The determined flow curves of the alloy were subsequently calculated according to the constitutive models based on Cingara equation and Shafiei and Ebrahimi equation and compared with the experimental results. By this manner, influences of work hardening and dynamic recrystallization on the hot deformation behavior of material could be described. Accurate prediction of flow curves can considerably improve the forming process design.
Heat Build-Up and Fire Performance of Wood-Polypropylene Composites Containing Recycled Mineral Wool
Authors: Väntsi Olli , Kärki Timo
Published: November 2013

The heat build-up and fire performance of wood plastic composites containing recycled mineral wool filler were investigated. Six wood polypropylene composites with recycled mineral wool content between 0 % and 64 % were evaluated. It was found that the heat build-up of the studied composites increased with initial addition of recycled mineral wool, but increasing the content of recycled mineral wool in the composites further did not have a notable effect onthe heat build-up. Fire performance investigation showed that the addition of recycled mineral wool into the composites did not decrease the magnitude of heat release rate peak, but decreased the total heat release of the composites. Investigation of residual masses after the pyrolysis demonstrated a good dispersion of recycled mineral wool fibers in the polymer matrix. It is concluded that fire protection of the polymer matrix is essential when developing the fire performance of wood plastic composites with recycled mineral wool as filler.
Low-Temperature Preparation of the BaO-B2O3 Matrix Composite Ceramics
Authors: Chen Song , Zhu De Gui
Published: November 2013

In this work, the energy-saving LTCC composite ceramics containing quartz, fused quartz and zirconia ceramic particles, respectively based on the binary system BaO-B2O3 were prepared by traditional solid-state preparation process at a sintering temperature of 900°C. Sintering mechanism and physical properties of the LTCC composite ceramics are investigated and discussed in detail in terms of their mineral phase composition. The results indicate that the introduction of α-alumina to the binary system BaO-B2O3 can improve the sintering behavior whereas the presence of the functional ceramic particles in the composite ceramics is important to achieve the peculiar physical characterlistics, which consequently supply more possibilities to regulate on the physical properties of the composite ceramics.
Corrosion Behavior of Various Surface Treatments Ti-6Al-4V Alloy - A Review
Authors: Yusuf Yusliza , Binti Omar Nooririnah , Azwar Azhari Muhamad , Bin Md Johari Md Ashadi
Published: November 2013

A Ti-6Al-4V alloy has been widely used as suitable materials for several of application such as aerospace, marine and biomedical application. Although this alloy is excellent in its properties and good corrosion resistance, the applications are limited because of their poor tribological property referring to the wear resistance property due to their low surface hardness. Therefore, it is inevitable to improve the wear properties of Ti-6Al-4V without detrimental the initial corrosion resistance properties even increasing it for better result. Over the years, various methods of surface treatments for Ti-6Al-4V have been studied and most frequently used are laser treatment, plasma nitriding process, PVD coating and also duplex coating. For each of the surface treatment discussed, several type of corrosion behavior have been studied with the conclusion is comparable to each other. In general, throughout these techniques, the wear resistance property of Ti-6Al-4V was improved and simultaneously improving the corrosion resistance property.
Diffusion Characteristics of Moisture in Polymer Composites under Different Hygrothermal Conditions
Authors: Zhong Yu Cheng , Joshi Sunil Chandrakant
Published: November 2013

The diffusion of moisture in composite materials is a complex phenomenon. In this investigation, effects of temperature, laminate architecture and cyclic hygrothermal conditions on the moisture absorption behavior of carbon/epoxy laminates were explored. Both woven and unidirectional laminates were fabricated from carbon fiber reinforced epoxy prepreg materials (CFRP). Specimens were later immersed in water at different temperatures, including room temperature (RT), 60°C and 80°C, or exposed to cyclic hydrothermal conditions. Within the temperature range studied, the diffusion of moisture inside the CFRP laminates followed the Ficks law. Both the diffusivity and the saturation moisture contents of the conditioned laminates increased with temperature. Furthermore, no weight variation was observed when the specimens were stored in a freezer at-30°C. The architecture of the reinforcement fibers also exhibited significant influence on the diffusion behavior of moisture in the laminates. Under the same temperature, the diffusivity of moisture in woven laminates was higher than that in unidirectional laminates.
Transport and Photoelectric Effects in Structures with Ge and SiGe Nanoclusters Grown on Oxidized Si (001)
Authors: Lysenko V.S. , Gomeniuk Y.V. , Kondratenko S.V. , Melnichuk Ye.Ye. , Kozyrev Y.N. , Teichert C.
Published: November 2013

Crystalline germanium nanoclusters (NCs) are grown by a molecular-beam epitaxy technique on chemically oxidized Si (100) surface at 700oC. Deposition of silicon on the surface with Ge nanoclusters leads to surface reconstruction and formation of polycrystalline diamond-like Si coverage, while nanoclusters core becomes tetragonal SiGe alloy. Possible mechanisms for nanoclusters growth are discussed. Selective photoexcitation of Ge or SiGe nanoclusters or space-charge layer of underlying Si allows to observe two non-equilibrium steady-states with higher and lower conductivity values as compared to the equilibrium one. The persistent photoconductivity (PPC) behaviour was observed after excitation of electron-hole pairs in Si (001) substrate. This effect may be attributed to spatial carrier separation by macroscopic fields in the depletion layer of the near-surface Si. Decreasing of surface conductivity, driven by optical recharging of NCs and Si/SiO2 interface states, is observed in the spectral range from 0.6 to 1.0 eV. Conductivity drop is discussed in the terms of hole accumulation by Ge-NC states enhancing the local-potential variations and, therefore, decreasing the surface conductivity of p-Si.
Charge Trapping in Hafnium Silicate Films with Modulated Composition and Enhanced Permittivity
Authors: Khomenkova Larysa , Portier Xavier , Slaoui Abdelilah , Gourbilleau Fabrice
Published: November 2013

Hafnium silicate dielectric films were fabricated by radio frequency magnetron sputtering. Their microstructure and electrical properties were studied versus annealing treatment. The evolution of microstructure and the formation of alternated HfO2-rich and SiO2-rich layers were observed and explained by surface directed spinodal decomposition. The stable tetragonal HfO2 phase was formed upon an annealing at 1000-1100°C. The control of annealing temperature allowed the memory window to be achieved and to be tuned as well as the dielectric constant to be enhanced.
Magnetic Resonance and Optical Study of Carbonized Silica Obtained by Pyrolysis of Surface Compounds
Authors: Savchenko D. , Kalabukhova Ekaterina N. , Sitnikov A. , Vasin A.V. , Starik S. , Gontar O. , Rudko G. , Nazarov A.N. , Lysenko V.S. , Tertykh V.
Published: November 2013

The carbonized silica (SiO2:C) nanopowders were prepared by chemical modification of fumed silica (aerosil) by phenyltrimethoxysilane followed by thermal annealing at temperature in range of 500-800 °C in nitrogen flow. Their magnetic properties were investigated by electron paramagnetic resonance (EPR) in the temperature range from 4.2 K to 292 K. The initial and annealed SiO2:C samples revealed carbon (C) related defects. The carbon related radicals (CRR) in annealed SiO2:C nanopowders withg-factors 2.0042, 2.0039 were attributed to the oxygen (O)-centered CRR and C-centered CRR with a nearby O heteroatom, respectively. The EPR data were compared with infrared (IR) and photoluminescence (PL) data. It was found that the position of the PL band depends on the type of CRR formed after sample annealing. The PL with maximum intensity at 440 nm was found for the sample annealed at 500°C in which O-centered CRR was observed while in the sample annealed at 600°C in which C-centered CRR with a nearby O heteroatom was observed and graphite-like amorphous C clusters were appeared the peak of the PL band was shifted to the 510-520 nm.
Neutron Diffraction Study of Elastoplastic Behaviour of Al/SiCp Metal Matrix Composite during Tensile Loading and Unloading
Authors: Wroński Sebastian , Baczmanski Andrzej , Gaj Anita , Wierzbanowski Krzysztof , Fitzpatrick Michael E. , Klosek Vincent , Lodini Alain , Marciszko Marianna
Published: November 2013

The aim of the present work is to study effects occurring during elatoplastic deformation and unloading of Al/SiCp metal–matrix composite material. We have measured lattice strains for both phases independently using two separated diffraction peaks (the 111 reflections of Al and SiC) during in situ tensile testing. Lattice strains were measured in the direction parallel to the applied load. The results were compared with an elastoplastic model in order to find parameters determining the plastic deformation of Al matrix (critical resolved shear stress and hardening parameter). We have found that during initial deformation relaxation of the thermal stresses occurs in both phases. Afterwards, the distribution of strains measured during the in situ test and unloading of the sample agree very well with self-consistent model prediction.
In-Depth Distribution of Stresses Measured by Multireflection Grazing Incidence Diffraction
Authors: Marciszko Marianna , Stanisławczyk Andrzej , Baczmanski Andrzej , Wierzbanowski Krzysztof , Seiler Wilfrid , Braham Chedly , Wróbel Mirosław , Szaraniec Barbara
Published: November 2013

The geometry based on the multireflection grazing incidence X-ray diffraction (called the MGIXD method) can be applied to measure residual stresses. Using this method, it is possible to perform a non-destructive analysis of the heterogeneous stresses for different and well defined volumes below the surface of the sample (range of several mm). As the result the average values of stresses weighted by absorption of X-ray radiation are measured. In this work the stress profile as a function of depth for mechanically polished Ti and Al samples were calculated from MGIXD data using inverse Laplace transform.
Evaluation of Internal Stresses Using Rotating-Slit and 2D Detector
Authors: Suzuki Kenji , Shobu Takahisa , Shiro Ayumi , Toyokawa Hidenori
Published: November 2013

The rotating-slit system was developed to overcome the measurement of internal stress using 2-dimensional detector. The diffraction spot trace method was proposed and examined to measure the internal stress of the material with coarse grains.
High-Pressure Deformation Techniques in Experimental Geophysics
Authors: Mueller Hans J.
Published: November 2013

Deformation processes have extrordinary importance for Geosciences. Mountainbuilding, i.e. orogenesis, slab subduction, continent-continent collision and penetration of the Earth’s mantle transition zone are examples of such processes. There is also a strong correlation between mineral content, phase transitions and structural properties of natural rocks. Ductile rock deformation is a typical property for Earth’s mantle conditions. Nevertheless most of experimental rock deformation was conducted under crustal conditions in the past. So, it was a revolutionary event when the first Deformation-DIA was introduced about a decade ago. Today this technique is indispensable not only for rock deformation under unextrapolated Earth’s mantle conditions but also for attenuation measurements in the seismic frequency range and attaining of lower mantle conditions in Large Volume Presses. In principle all these techniques require the installation of the high pressure device at a 3rd generation light source.
Residual Stress in Ferrite and Austenite after Rolling and Recovery Processes
Authors: Wierzbanowski Krzysztof , Baczmanski Andrzej , Wawszczak Roman , Wronski Marcin , Wróbel Mirosław , Lodini Alain , Braham Chedly , Seiler Wilfrid
Published: November 2013

The relation between residual stresses occurring in plastically deformed material and after subsequent annealing is of practical and theoretical importance. In the present work the X-ray multi-reflection method was applied to determine residual stresses and their orientation distribution in rolled and annealed ferrite and austenite steel samples. An important decrease of the first- and the second-order residual stresses was observed during recovery and recrystallization processes. Diffraction peak width was also studied and correlated with stress variation during annealing. Different kinetics of stress relaxation in ferrite and austenite were explained by different levels of stacking fault energy and different types of intergranular interactions occurring in these materials.
Centralizers in the R. Thompson group $V_n$
Authors: Bleak Collin , Bowman Hannah , Gordon Lynch Alison , Graham Garrett , Hughes Jacob , Matucci Francesco , Sapir Eugenia
Published: November 2013

Let

n \ge 2

and let

\alpha \in V_n

be an element in the Higman–Thompson group

V_n

. We study the structure of the centralizer of

\alpha \in V_n

through a careful analysis of the action of

\langle \alpha \rangle

on the Cantor set

\mathfrak{C}

. We make use of revealing tree pairs as developed by Brin and Salazar from which we derive discrete train tracks and flow graphs to assist us in our analysis. A consequence of our structure theorem is that element centralizers are finitely generated. Along the way we give a short argument using revealing tree pairs which shows that cyclic groups are undistorted in

V_n

.