bluuebunny/crossref_metadata_2025 huggingface dataset:
Study and Application of Information Integration of Enterprise Model Based on Web Service
Authors: Lian Rui Mei
Published: November 2013

Enterprise's information integration can combine the variety of information resources and business of the enterprises organically, realizes the integration crossing over system border. The purpose is to integrate the existing platform, database, application and server together organically step by step from the data aspect, to solve "information island" and the problem existed in information interact. This paper analyses the disadvantages of the traditional integrated scheme and the advantages of integrated scheme based on Web Service, researches the present Web Service theory and correlated technology, and establishes the scheme of enterprise information integration based on Web Service, applies to the construction of campus informatization integrated database platform and realizes the campus database sharing.
Detection and Analysis of Intrusion Characteristic Based on BP Neural Network
Authors: Guo Hong Liang , Kong Shao Ying
Published: November 2013

A Detection and Analysis algorithm base on BP neural network was proposed to solve the problem of low intercept rate, which was exist in traditional algorithm. The traditional algorithm cannot detect the intrusion effectively because the intruder was always combined with other computer virus. The BP neural network can transfer the input to output with nonlinear method, the characteristic was extracted and compare, then the intruder can be detected and intercepted with higher probability. Compared with traditional algorithm, the new algorithm can intercept the intruder with 22% higher rate. Result shows good performance of the algorithm in the intrusion signal detection and excellent perspective in practice.
The Research and Application of Pork Traceability System Based on RFID
Authors: Wang Zi Ting , Lin Yan Ping
Published: November 2013

The author analyzes and researches the heterogeneous data of the food traceability system,then propose the template-based adaptive heterogeneous data processing algorithms. According to the algorithm, the middle-ware ,with the design of embedded RFID achieves the processing and integration of heterogeneous data . The middle-war it work with the back-end server online, but also possess high practicality when the network off-line works alone.Copyright © 2013 IFSA.
Study of Campus Network Security Based on Dynamic Self-Adaptive Network Security Model
Authors: Huang Chang Wei , Xiong Jin Quan
Published: November 2013

Taking dynamic self-adaptive network security model system of the whole network as theoretical guidance, this thesis analyzes security risks faced by campus network completely and in full detail, combining with the network system features. The current mainstream of network security technologies such as firewalls, intrusion detection,VPN, certification, and others are carefully studied to illustrate security technologies which shall be focused for the campus network security. Then, taking the Jiangxi Science and Technology Normal University campus network as an example, the specific characteristics of campus network are considered to analyze the reality of network security and to design campus network security solutions, which have strong relevance and feasibility.
Development Mode of Co-Construction and Sharing in Mt. Sanqingshan Geopark Achieved by Tourism Geographic Information System
Authors: Ye Zhang Huang , Tao Xian Guang , Yan Qiang , Cha Qi Zhi , Chen Yang Qing
Published: November 2013

Sustainable development is one of the three main objectives of geoparks. As China has the largest number of global Geoparks, it is of increasing importance for us. The involvement and support of the local community are indispensable to the sustainable development of the Park. But how to achieve the goal in the network age is a big problem. Taking the practice of Mt. Sanqingshan Geopark in recent years as an example, the paper explores the involvement into the Park construction and management by the local residents in different ways, especially through the modern information technology, such as tourism geographic information system (TGIS), in order to share the fruits of Park development, and achieve the sustainable development of the Geoark.
Research on Optimal Communication Method in Long-Distance Education Networks
Authors: Zheng Chun Sheng
Published: November 2013

This paper begins with the design theories and principles of the long-distance education system. By analyzing the features of the ubiquitous learning and the modes of the long-distance education, the paper designs a communication procedure optimized long-distance education system. It detailed describes the system construction which integrates the optimal communication routines and long-distance education into a whole system. The procedure needs to gradually extend each component in the system in order to adapt the continuous developing techniques and changing learning ideology.
Design for Property Management System Based on B/S Architecture
Authors: Song Li Qiu
Published: November 2013

Existing property management system has low reuse level in software developing process which cannot meet the new needs. In order to solve this problem, this paper proposes a design method for property management system based on B/S architecture. The method merges the component-based ideas into the analysis, design and implementation process of property management system to design a layered component-based architecture. The paper extracts components of the system, and gives implementation of some elements in the system and system simulation results. Experiments show the component technology enhances system maintainability and reusability, and achieves scientific, standardized and informatization of the property management.
Electronic Structure and Optical Properties of BaTi0.75Nd0.25O3
Authors: Yang Shi Liang , Pan Hong Liang , Li Teng , Liu Yi Ming
Published: November 2013

The electronic-energy band structure and optical properties of BaTi0.75Nd0.25O3are calculated by the pseudo-potential plane wave (PP-PW) mehod with the generalized gradient approximation (GGA). The energy band structure, density of states (DOS) are obtained. The optical properties including the dielectric function, reflectivity, absorption spectrum, extinction coefficient, energy-loss spectrum and refractive index are also discussed.
Simulation of Optical Properties of Ni-Doped ZnO Based on Density Functional Theory
Authors: Li Teng , Pan Hong Liang , Yang Shi Liang
Published: November 2013

The semiconductor ZnO has gained substantial interest in the research community in part because of its large exciton binding energy (60 meV).Based on first-principles spin-density functional calculations, the electronic structures and reflectivity of pure ZnO have been calculated. We find that theory calculated peaks basal consistent with the experiment results. The absorbing properties of Ni doped ZnO have also been calculated and the relationships between electronic structures and absorbing properties are investigated. The results show that the absorbing properties of Co doped ZnO improved significantly compared to pure ZnO system. Absorption frequency peak moves to low frequency and one absorption band appear at 1236.9nm.The theoretical results have offered a direction for the designing and application of ZnO which could lead to lasing action based on exciton recombination even above room temperature.
Application of LiFePO4 Battery in Power System DC Equipment Maintenance
Authors: Wang Qing Hao , Xu Jian Guo , Li Xian Feng , Pei Yu Jie , Wang Yi , Jiao Hong Zhi , Liu Guo Bin
Published: November 2013

The DC power substation equipment is all energy infrastructure, once therere some problems with the DC equipment, which will make all the related equipment loses power, it will directly affect the safe operation of the substation. This article discusses some shortcomings of the original lead-acid batteries for emergency DC power, demonstrated high frequency switching power supply with the combination used of LiFePO4 iron group of science, along with a brief description of the features and benefits of their work.
Voltage Stability Analysis of Islanded Microgrid
Authors: Qin Wen Ping , Dong Dong , Mi Xiao Dong
Published: November 2013

The clean and renewable distributed generations (DGs) could be combined in microgrid. Keeping microgrid bus voltage stable is very important. This paper proposes an integrated control strategy of combining droop control and V/f control. A complementary wind-solar-energy storage microgrid model is built based-on Simulink software. The effect on voltage stability based on the integrated control strategy is analyzed.
Developing Simulation Model for Four In-Wheel Motor Electric Vehicle
Based on Simulink
Authors: Li Gang , Yuan Hang , Shi Jing , Li Ning , Zhou Zhi Cheng
Published: November 2013

The 15 DOF four in-wheel motor electric vehicle model is developed based on Matlab / Simulink. The model adopts modular design. The dynamic model equations, vehicle model diagram and the methods of each module modeling are presented. The model is verified by commercial software Carsim. The results show that the model is higher accuracy and it can be used for the control algorithm improvements and validation as a good platform.
An Intelligent Charging Station Matching Method for Electric Vehicles in Internet of Things
Authors: Liu Yu Xi , Zhao Jia Kui , Ouyang Hong , Wang Wen Hong , Wang Shu Long
Published: November 2013

The internet of things (IoT) is considered as one of the most important supporting technologies for the smart grid, which is considered as one of the most important application areas of the IoT. In the electric IoT, with the development of electric vehicles (EVs), effectively modeling road network becomes more and more important. In this paper, a road network model which captures the real-life road conditions better than previous models is introduced. Moreover, an awaiting time in the queue is taken into consideration before EVs being charged. Compared with minimum distance standard, the proposed time minimum standard and Dijkstra algorithm are adopted to track the path of the EVs. Finally, a velocity limitation of EV is considered in the simulations to embody the real-life road network.
Design of Intelligent Building Lighting System Based on CAN Bus
Authors: Cheng Xiao Liang , Hu Shan , Tian Li Guo , Li Meng
Published: November 2013

The traditional lighting control system has the problem that short communication distance, slow transmission speed and high error rat. This paper presents and designs an intelligent lighting control system based on CAN bus. Describing the design framework of intelligent lighting system, it focuses on the realization of CAN communication module of SJA1000. The intelligent lighting control system based on CAN bus is a distributed intelligent control system. Compared with the traditional lighting control system, it overcomes the effect of relatively scattered control and disadvantages of poor management, poor real-time and low degree of automation.
Off-Line Robust MPC Algorithm for VAV Air-Conditioning Systems
Authors: Zhao Min , Jiang Yan Xia
Published: November 2013

The efficient temperature control of variable air volume (VAV) air-conditioning system can greatly reduce the energy consumption. In order to due with system constraints and uncertainties, and guarantee the closed-loop stability, an off-line min-max robust model predictive control algorithm is presented for the temperature control of a VAV system. As the first-order-plus-time-delay model of system is described by a polyhedral described uncertain model, the off-line ellipsoidal invariant set based robust MPC algorithm is employed for the controller design. Simulation results show efficiency of the proposed control algorithm implemented in the temperature control of a VAV system, which can enhance robustness, and satisfy the constraints.
Research on Frequency Stability Control Strategy for the Third Line Defense of Sending-End Power System
Authors: Song Shu Yong , Liu Xin Yuan , Sun Yi Kai , Zhang Wen Chao
Published: November 2013

Regional energy base with large installed capacity, small local power load capacity and great amount of power transmission have been more and more common in China. For this kind of sending end power grid, the 3rd line of defense for frequency stability is crucial. The high frequency generator tripping is an effective emergency frequency control measure. But its setting and configuration mainly relies on operational experience and off-line simulation calculation. An equivalent model suitable for the analysis and setting calculation of high frequency generator tripping is introduced firstly. Based on the model, and aimed at an actual frequency emergency control problem, a scheme for high frequency generator tripping is proposed. Furthermore, a speed-up tripping scheme using df/dt criterion is proposed to optimize the frequency response. Numerical simulations are conducted on real power grid model of Shanxi province to demonstrate the effectiveness and adaptability of this scheme. The setting principle and calculation method of high frequency generator tripping can introduce to similar power grid for reference.
ESO-Fuzzy Controller for Papermaking Process
Authors: Zheng En Rang , Zhang Ling , Li Guang
Published: November 2013

A kind of fuzzy control system based on papermaking process is proposed. This fuzzy control system is used with the extended state observer. The results of simulation show that it has satisfactory tracking performance, good robustness and the powerful ability to suppress disturbances.
Research and Application of a New Constant Tension Control Device of the Carbon Fiber Warping Machine
Authors: Qin Jian Feng , Jiang Xiu Ming , Yang Jian Cheng , Wang Hua Qing , Yang Kai , Bai Yu , Hu Shuang Hu
Published: November 2013

This paper presents a new constant tension control device which is suitable for warping of the carbon fiber or the flake yarns which are zero twist, high tensile strength, low shear strength, high specific modulus and self-lubrication and can meet the requirements of the warp tension of the carbon fiber multi-layer weaving equipment which is in the process of development. The device can make yarn tension consistent in warping process. Especially with the decrease of the diameter of yarn tube, the tension of yarn sheet is consistent in warping process. In the process of warping the warp doesnt twist and wear is small. The experimental results show that the mechanism can realize accurate control on the tension of the single yarn and the yarn sheet, and is able to meet the requirements of the warp tension of the carbon fiber multi-layer weaving equipment which is in the process of development.
A Micro Regional Market Share Real-Time Prediction Based on Extended Kalman
Authors: Du Cui Feng , Shen Wen Ming , Jiang Shi Bao
Published: November 2013

The real-time prediction of micro regional market share provides decision for the analysis of micro regional marketing scheme and micro regional channel planning. More and more increasing complexion mobile network environment require real-time micro area of market share and only mastering micro regional market share can have a more comprehensive understanding of market. To solve this problem, consideration of advantages of real-time aspects of the extended Kalman filtering algorithm in predicting, we propose a real-time prediction algorithm based on the extended Kalman filter Market Share. The algorithm can be real-time prediction of mobile network market share of base station. The simulation results show that the proposed algorithm in this paper is a real-time and good prediction quality.
Research of the Multilayer Carbon Fiber Loom's Shedding Device
Authors: Yang Kai , Yang Jian Cheng , Wang Hua Qing , Qin Jian Feng , Bai Yu , Hu Shuang Hu , Jiang Xiu Ming
Published: November 2013

This paper designs a set of jacquard and dobby shedding device, it specially suitable for 30 layers carbon fiber weaving equipment, which meet the requirement of the special shed. Through to the main drive system design of the jacquard, the structural design and the kinematics analysis of tandem cylinder dobby shedding mechanism, so that the design reasonable. The experiments show that the opening device can well ensure the shedding action orderly, continuously and the shed clear, it can meet the requirements.
Artificial Intelligent Diagnosing Method Based on the Certainty-Speculated Reason of Pivot Factor
Authors: Tan Wen Xue , Wu Hua Rui , Wang Xi Ping
Published: November 2013

How to solve disease-diagnosing problem effectively by the aid of Artificial Intelligence Computer has been being a mainstream of Intelligent System researching and development. Heretofore, performance of the well-known native Uncertainty Reason Resolution method still is unsatisfactory to professionals. This paper pioneers the concept of Associative-Pivot Factor and its Certainty Index Speculation algorithm, and on this base designs A novelty Machine Diagnosing Algorithm based on the Certainty Reason of Associative-Pivot Factor. Results and analysis demonstrate that the method exhibit a better efficiency than man-expert individual and the native CF Method. Generally speaking, it manifests an accurate rate of diagnosis over 82% and possesses the capacity to expand diagnosing capability of man-expert.
Study the Fisheye Staring Video Surveillance System of nothing Blind-Zone Based on the DaVinci Chip
Authors: Wu Jian Hui , Zhang Guo Yun , Guo Long Yuan , Yuan Shuai
Published: November 2013

A staring and nothing blind-zone video surveillance system was designed based on the DSP chip of TMS320DM6467 and the fish-eye lens which has ultra-view field. This fisheye lens has 185 degree field of view, and make the system has 360 degree panorama and nothing blind-zone monitoring which used two fish-eye lens imaging system. Firstly, this paper designed the panorama imaging system, and then studied the calibration method for it. The hardware system used the multimedia imagery processing chip of TMS320DM6467 which has dual core processor and can processing the fish-eye image real time. The experiment shows the fisheye image had 360 degree sphere with nothing blind-zone for surveillance area and the hardware of processing center can work stable. This system can intelligent surveillance when upload the algorithm.
The Analysis of the Performance of Active Frequency Drift Islanding Method
Authors: Huang Wen , Zheng Tao , Xu Shi Guang , Liu Zhi Yuan , Wen Jing Hua
Published: November 2013

Active frequency drift islanding detection method is one of most widely used in the distributed generator islanding detection. Now domestic researches of islanding detection have not been done deep researched about the reason why islanding detection method will become invalid. Therefore, the paper analyses the performances of the frequency drift islanding method from load phase frequency characteristic and algorithm phase frequency characteristic, which are the major factors affecting the effectiveness of islanding detection method. At last, this paper proved the analysis results with MATLAB.
Network Control System Fault Diagnosis Method Based on Sliding Mode Observer
Authors: Han Lei , Xu Qi Hua , Liu Rui Ming
Published: November 2013

This paper constructs a sliding mode observer of fixed long delay network control system with an augmented modeling method, and then proves the feasibility of system residuals converging to zero by Lyapunov stability theorem. The network control system fault diagnosis is discussed in depth by detecting changes in the residuals. In addition, this paper takes Gradient faults and mutation faults of actuator as examples to conduct fault diagnosis simulation, and the simulation results show that this method can detect the system faults effectively.
The Research of IEEE 1588 Interface Module Based on LXI Instrument
Authors: Zhu Wang Chun , Zhang Xin
Published: November 2013

LXI, which is generally recognized as the new generation of instrument bus technology, not only has developed rapidly in the field of test and measurement, but also has a vast potential for future development. At present, the LXI trigger requires the clock synchronization precision to reach a sub microsecond level or even higher one. Therefore, in order to meet this accuracy requirement, a scheme based on the embedded Linux and IEEE 1588 protocol is proposed in this paper on the basis of studying LXI so as to realize high accurate clock synchronization. This scheme acquires hardware timestamp by utilizing PHY chip DP83640 and realizes PTP hardware clock driving based on Linux. A synchronization test with Agilent B LXI trigger box under the current condition is conducted and about 100ns of synchronization precision can be reached when connected with cable directly. The result demonstrates the feasibility of the scheme and that the clock synchronization precision can reach a nanosecond level.
Information Fusion Technology Based on Wireless Fire Detection and Alarm System
Authors: Niu Ling Hui , Hu Zhu Ge
Published: November 2013

In order to solve the problem, which is "the traditional fire alarm system is only used to detect a particular physical or chemical signal of the fire, moreover, false alarm and failure alarm can occur easily. We apply multi-sensor composite detection technology and wireless communication technology in the fire detection and alarm system,and design an intelligence distributed wireless fire detection alarm system, which is mainly based on STM32 control chip.
A Reprograming Code Distribution Protocol for WSN Based on Hierarchy Structure
Authors: Qian Kai Guo
Published: November 2013

A reprograming code distribution algorithm for wireless sensor network based on hierarchy structure (RCDABHS) is proposed to improve the nodes energy efficiency and extend the lifetime of wireless sensor network .The algorithm choices portion of nodes with more residual energy to form code distribution tree with minimum energy consumption cost, which completes the code distribution to all heads. Other nodes request the new code from the local cluster head nearby principle. Cluster heads were dynamically elected according to residual energy and distance from base stations to implement the entire network node load balancing, reduce the energy consumption and prolong the network life cycle effectively. The performance analysis and simulation experiments show that the new algorithm effectiveness.
Coverage Optimization of Hybrid Wireless Sensor Networks Based on Modified Particle Swarm Algorithm
Authors: Yao Su Fen , Zhao Jian Qiang
Published: November 2013

A strategy for controlling mobile nodes based on PSO algorithm with neighborhood disturbance was proposed for improving the network coverage rate in wireless sensor networks. The non-dominated sorting strategy was led into basic PSO algorithm to seek best particle and adaptive neighborhood disturbance operation was used to conquer the drawback of PSO falling into local optimum. Therefore, the effect of network coverage had been improved and the network energy consumption can be reduced.
Research on Effect of Blanket Jamming on GNSS Signal
Authors: Xu Rui , Hu Yong Hui , Zhang Tao , Zhang Fan
Published: November 2013

this article uses Power Spectrum Density Theory and The Monte Carlo Simulation Method to analyze the effect of blanket jamming on the bit error rate of satellite navigation signal, and emulate, analyze and compare suppress interference interference effect on PSK-R signal and BOC signal. All the analyses are based on the research on blanket jamming and PSK-R signal and BOC signal.
A New Method for Objective Communication Speech Quality Evaluation
Authors: Shi Tian Yu , Liang Chao
Published: November 2013

In some cases, MFCC will fail to effectively demonstrate the real voice quality. In order to achieve speech quality effectively, a new speech feature extraction method are proposed on the base of MFCC. We use Gammatone filter bank instead of triangle filter bank, which is not sensitive to the excursion of formant, and we use RASTA filter to further process the results of the previous step; the experimental results show that the proposed algorithm is effectively in speech evaluation.
Study on the Application of Data Mining Based on Campus Card Platform
Authors: Qian Yuan , Shi Quan
Published: November 2013

The thesis uses data in the database of campus card platform as the analysis object, combined with statistical methods and data mining technology to analyze the students consumption and the situation of the canteens. We use the Microsoft .NET and SQL Server 2008 business intelligence development tools to mine and analyze these data; know canteens consumption and learn about the business status and the popular shops of the canteen by using the K-means algorithm; analyze and predict students behavior and the situation of the canteen by using time series algorithm. It is convenient to manage the college students, and provide data support for university policy makers and shoppers to make plans.
Impulse Noise Suppression Method by Median Filtering with Parity Extraction
Authors: Li Zhen Xing
Published: November 2013

A new impulse noise suppression method by median filtering with parity extraction was proposed in this paper. The window size of the median filter has important effect on the performance of the filtering result, larger window size can suppress impulse noise effectively but often at cost of loss of the detail information of the signal, while smaller window size can protect the detail information better but results in degrading of the noise suppression. Parity extraction is done to the signal at first and median filtering carries on the odd and even part respectively, and then a new method of median filtering with short window size to suppress the impulse noise is obtained. Simulation and experiment data of telemetry process results show the effectiveness of the proposed method.
Preparation and Characterization of Fibroin/Chitosan/Hydroxyapatite Porous Scaffold
Authors: Sukhachiradet Tarin , Wattanutchariya Wassanai
Published: November 2013

Autograft is a general method used in orthopedic surgery for a bone replacement. However, the disadvantage of this method is the amount of risk factor to the donor sites. Currently, bone tissue engineering is another technique that could be implemented to solve this problem. Artificial bone scaffold generated by bone tissue engineering can be employed in order to accelerate damaged bone regeneration. In fact, this scaffold can be fabricated from synthetic contents such as bioceramics, biopolymers or composite. Three types of biomaterials: Chitosan, Hydroxyapatite (HA) and Fibroin were used to form porous scaffold. This research investigated the preparation of Hydroxyapatite and Fibroin from natural materials. Hydroxyapatite was synthesized from mollusk shell by wet chemical precipitation method. While, Fibroin was extracted from silk worms cocoons. Freeze drying method was employed to fabricate this composite porous scaffold. A mixing ratio of 1:2:1 among Fibroin: Chitosan: HA was studied to evaluate biodegradability, biocompatibility, porosity and pore structure of the output scaffolds. Results show that the output scaffolds have an interconnected porous structure with a pore size around 150-200μm and an average porosity of 94.26%. While the average degradation rate of the scaffold in lysozyme was 10.46% at 7 days. In addition, the biocompatibility test based on XTT assay test, shown that the scaffolds were non-cytotoxicity, which could be good for bone filling application in the future.
Constitutive Modeling of Advanced High Strength Steels Characterized by Uniaxial and Biaxial Experiments
Authors: Panich Sansot
Published: November 2013

Anisotropic plastic behavior of advanced high strength steel sheets of grade DP780 and DP980 were investigated using three different yield functions, namely, the von Mises, Hills 48 and Barlat2000 (Yld2000-2d) criteria. Uniaxial tensile and balanced biaxial (hydraulic bulge) tests were conducted for the examined steels in order to characterize flow behavior and plastic anisotropy for different stress states. Additionally, disk compression and In-plane biaxial tension tests were performed for obtaining balanced r-value of DP780 and DP980, respectively. All these data were used to determine the anisotropic coefficients. According to the different yield criteria, yield stresses and r-values for different directions were calculated corresponding to these yield criteria. The results were compared with experimental data. It was found that the Yld2000-2d model precisely predict well with experimental data than the other models.
Magnetocaloric Effect of LaFe11.5Si1.5C0.2 Sinters Prepared by SPS Process
Authors: Wu Yuan Yuan , Long Yi
Published: November 2013

In order to make high performance magnetic refrigeration materials, Spark Plasma Sintering (SPS) process was introduced in the preparation of LaFe11.5Si1.5C0.2 materials. Results show that the size of the starting powder has a significant influence on the magnetic entropy change than the sintered temperature does. Finer starting powder induce a decomposition of 1:13 phase into α-Fe phase during sintered process. By controlling the particle size, the decomposition can be decreased. The maximum magnetic entropy change value of the sinters with the size of sutible starting powder is as same as the parent compound. Also, the hysteresis loss of the sinters decreased.
Weibull Analysis of the Effect of Interrupted Aging Treatments on the Fatigue Life of Components Made of Cast Aluminium Alloy 354
Authors: Sainis Salil , Kalra Aakarshit , Babu G. Dinesh , Muktinutalapati Nageswara Rao
Published: November 2013

Cast aluminum alloy 354 is widely used in the automobile industry due to its attractive set of mechanical properties and excellent castability. The compressor wheel in turbochargers, for example, is used for the production of this alloy. Apart from mechanical properties like fracture toughness and tensile strength, the fatigue life of the component is also a critical issue while considering the performance. This study makes an attempt to improve the fatigue life of a component made out of this alloy by subjecting it to interrupted aging cycles similar to T6I4 and T6I6 (discussed in the published literature) instead of the normally used T61 standard aging treatment. Results show that subjecting the material to these interrupted aging treatments gives lower fatigue life than that obtained after subjecting it to standard T61 conditions.Also, T6I4 treatment yields better fatigue life as compared to T6I6.
The Effect of Corrosive Medium CaCl2 on the Quality of Shaped Refractory Materials
Authors: Šolc Marek , Markulik Štefan
Published: November 2013

The article describes the quality refractory materials, the main requirements for quality of lining bricks and chemical and physical wear factors, which influence the quality of refractory materials. Another part of the article describes the corrosive effect of medium CaCl2 for refractory materials. The results of the experimental part are evaluated macroscopic, microscopic analysis, and then was defined the penetration of elements Ca and Cl into the refractory materials. At the end of the article, is discussion to the results of impact melt CaCl2 for refractory materials.
The Research on the Polyurethane Elastomers Based on Diphenylmethane Diisocyanate and Diamine Chain Extenders
Authors: Yi Yu Hua , Guo Liu Jie
Published: November 2013

This paper mainly describes the properties of mechanical properties, heat resistance, and dynamic mechanical properties of polyurethane elastomer based on MDI and diamine chain extenders. Compared with the polyurethane extended by diol, diamine extended MDI level polyurethane elastomer shows higher hardness, tensile strength, 300% modulus, tear strength and better heat resistance. But the soft segment relaxation shifts to higher temperature.
Using Semantic Technology to Enhance ESB Capabilities
Authors: Jin Gui Yang , Lv Fu Zai , Xiang Zhan Qin
Published: November 2013

Modern enterprises consist of complex business systems. These systems need to be integrated to support enterprises operation. The SOA and ESB become an important enterprise integration architecture style for designing and implementing integration systems. But there are some limitations of todays ESB framework, such as only syntactic description of service interface, inability to perform semantic mediation and incapable process knowledge management. Therefore developers need deep and intimate knowledge to develop integration systems. We introduce an ontology-based semantic annotation approach to enrich and reconcile semantics of data, services and process models on ESB that enables data, service and process models interoperability on the semantic level through common domain ontologies.
Measuring the Free Surface Velocity of Brass Plate Using F-P Interferometer
Authors: Zheng Bo
Published: November 2013

Brass plates with a diameter of 100 mm and thickness of 2.0 mm or 0.87 mm were accelerated by TNT and Comp. B charges. A plane wave generator with 100mm in diameter was used to form one-dimensional detonation within the charge. Six acceleration jumps of the plate free surface caused by the interactions between the incident and reflective waves were observed by use of a Fabry-Perot velocimeter and an image converter camera system. We believe that the experimental system adopted in present work provides a perfect technique for studying the detonation properties of the explosives and the dynamic response of materials to the impulsive loading.
Effect of Chemical Treatments on ITO and OLED Device
Authors: Kumar Katam Naveen , Singh Charan , Rawat Madhu , Anand R.S.
Published: November 2013

For an OLED, its electrodes and organic film stack determine its performance. In this paper, we study the effect of acidic (Sulfuric acid) and basic (Sodium Hydroxide) ITO surface treatments. Resistance variation, roughness variation and etc. are recorded. Their effect on device performance is studied by fabricating OLED of m-MTDATA/NPB/Alq3/BCP/LiF/Al structure. The difference in device characteristics with different overlaying Hole Injection Layer (HIL) is studied by comparing fabricated devices
Dynamic Analysis of Lifting Mechanism Based on Rigid-Flexible Coupling
Authors: Ge Xu Kun , Liu Da Wei , Tian Bin
Published: November 2013

To obtain realistic dynamic characteristics of the lifting mechanism, the liftarm and drawbar were regarded as flexible bodies. The modal neutral file (MNF) of liftarm and drawbar were obtained from modal analysis conducted by finite element analysis (FEA) software MSC.Patran/Nastran . Then the MNF were translated into ADAMS, a rigid-flexible coupling model of the lift mechanism was built by replacing the rigid bodies with MNF. The forces of each hinge points in the rigid-flexible system, which were obtained from dynamic analysis, were compared with the rigid ones. The results showed that forces obtained from the rigid-flexible system were smaller than the rigid ones, which provided a reference for the design and improvement of the lifting mechanism.
Microstructural Evolution and Quenching Properties of 22MnB5 Steel for Hot Stamping during Resistance Heating
Authors: Sun Cai Na , Zhang Heng Hua
Published: November 2013

Austenitic continuous heating transformation dynamics, microstructural evolution and quenching properties of 22MnB5 steel during resistance heating were investigated. Steel sheets with thickness of 1.6 mm were heated to various temperatures (800~1200 °C) either by resistance heating at two heating rates of 100 and 300 °C/s or furnace heating. The increment of superheat degree was parabolic relationship with increasing heating rate. Samples heated above Ac3 of respective heating rates exhibited a full martensite microstructure and a hardness of above 490 HV. Austenitic coarsening rate of resistance heating samples was much lower than those by furnace heating. Austenite grain size by resistance heating was smaller than 38 μm while these by furnace heating reached 74 μm at 1200 °C. Samples heated by resistance heating at 300 °C/s had a good performance of 1800 MPa tensile strength and 5.6 % elongation, and product of strength and elongation reaches 10080 MPa%. The good combination of tensile strength and elongation by resistance heating might result from the finer austenite grain size and smaller martensite plate.
Characterization of Hot-Mix Asphalt Made with Recycled Concrete Aggregates that Have Been Cured for 4 Hours in the Oven
Authors: Rodríguez Pasandín Ana M. , Pérez Pérez Ignacio Pérez , Gómez Meijide Breixo
Published: November 2013

In this research a laboratory characterization of hot-mix asphalt (HMA) made with recycled concrete aggregates (RCA) from construction and demolition waste (CDW) as base layer in road construction has been conducted. HMA containing 5%, 10%, 20% and 30% of RCA in place of virgin aggregate were evaluated. To improve water resistance of the mixtures, they were left in an oven for 4 hours at mixing temperature before compaction to allow the bitumen absorption and, in addition, obstructing the mortar pores, strengthening the attached mortar onto the RCA surface and thus, preventing water pathways. The tested mixtures complied with Spanish water resistance requirement and also showed a water resistance performance much higher than that of the mixtures that were not cured in the oven. Stiffness and resistance to permanent deformation were also studied showing satisfactory results.
Electrical Properties of Composite Films with Silicon Nanocrystals in the Insulating Matrix
Authors: Evtukh A.A. , Bratus O.
Published: November 2013

The electrical properties of nanocomposite SiO2(Si) films containing Si nanoclusters have been investigated. The films were formed by oxide assisted growth that included ion plasma sputtering (IPS) of Si target and following high temperature annealing. It was determined that electrical conductivity of the films correspond to the mechanism of hopping conductivity with variable hopping length through the traps near the Fermi level (Mott mechanism) due to the large number of silicon dangling bonds in the dielectric matrix. The peculiarities of charge capture in nanocomposite SiO2(Si) films for their application as the medium for charge storage in memory cells have been investigated by C-V method. The good charge storage possibility of SiO2(Si) films formed by IPS deposition with followed temperature annealing has been observed. The negative differential capacitance has been revealed in conditions of semiconductor surface accumulation.
The physical model for explanation of the negative differential capacitance of MIS structures with nanocomposite SiO2(Si) films as the dielectric has been proposed. The model is based on the parallel conjunction of the oxide capacitance and nanocrystals capacitance.
Low Dislocation Density and High Mobility GaN Layers for DHFET Channels Grown on High-Temperature AlN/AlGaN Buffer Layer by Ammonia MBE
Authors: Alexeev A.N. , Petrov Stanislav I. , Krasovitsky D.M. , Chaly V.P. , Mamaev V.V.
Published: November 2013

The growth of AlN buffer layer at extremely high temperature (1100-1150oC) in ammonia MBE STE3N2 system is shown to be the key step to obtain high quality GaN layers for DHFET channels. The buffer layer sequence from c-sapphire substrate involved AlN, AlGaN/AlN superlattice and AlGaN transition layers. TEM study showed gradual decrease of threading dislocation density from (2-4)×1010 cm-2 in AlN to (9-10)×108 cm-2 in the top GaN active layer. The improvement of structural quality resulted in substantial increase in electron mobility up to 600-650 сm2/Vs in a 1.5-μm-thick GaN top layer lightly doped with silicon up to n=(3-5)×1016 cm-3. These results correspond to a good quality MOCVD GaN grown on sapphire and several times better than in conventional MBE. Employing such a GaN layer in a double heterostructure (DH) with the cap AlxGa1-xN barrier layer (x=0.25-0.4) allows to change the electron sheet density, mobility and sheet resistance in a two dimensional electron gas in the range of 1300-1700 cm2/V.s, (1.0-1.8)×1013 cm-2 and 230-400 Ω/, respectively. Application of this technology and DH design for growing on SiC substrates enabled one to manufacture a DHFET with a gate length of 0.5 μm for 0.03-4.0 GHz extra-broadband power amplifiers having Pout=2.5 W, gain 17-25 dB and efficiency 30%.
Plastic Strain of GlidCop for Materials of High Heat Load Components
Authors: Sano Mutsumi , Takahashi Sunao , Watanabe Atsuo , Kitamura Hideo , Shiro Ayumi , Shobu Takahisa
Published: November 2013

We investigated the plastic strain of GlidCopTM, copper that is dispersion strengthened with aluminum oxide, by X-ray diffraction using synchrotron radiation. The purpose of this study is to verify the accuracy of the elastic-plastic analysis, which has been employed to predict the fatigue life of GlidCop. As a result, the plastic strain was estimated to be 0.7- 1.3% at any number of cycles, which is slightly smaller than the analytic solutions.
Thermal Stability of Retained Austenite in Low Alloyed TRIP-Steel Determined by High Energy Synchrotron Radiation
Authors: Brauser Stefan , Kromm Arne , Dabah Eitan , Kannengiesser Thomas , Rethmeier Michael
Published: November 2013

TRIP-steels offer a good combination between strength and ductility. Therefore TRIP-steels are widely used in the automobile industries. The aim of this work is to study the stability of involved phases during heating and to identify the kinetics of the occuring phase transformations. For that purpose, in-situ diffraction measurements, using high energy synchrotron radiation were conducted. The analysis revealed the decomposition of the metastable austenitic phase into carbide and ferrite along the heating process and the regeneration of the austenite by further heating of the sample.
Depth-Resolved Residual Stress Analysis with Conical Slits for High-Energy X-Rays
Authors: Staron Peter , Fischer Torben , Eims Eike Henning , Frömbgen Sebastian , Schell Norbert , Daneshpour Shahrokh , Martins René V. , Müller Martin , Schreyer Andreas
Published: November 2013

A conical slit cell for depth-resolved diffraction of high-energy X-rays was tested at the high-energy materials science beamline HEMS at PETRA III and used for the analysis of residual stresses in a laser beam welded steel overlap joint. With a conical slit width of 20 µm and beam cross-sections below 100 µm, depth resolutions well below 1 mm were achieved. The residual stress distributions obtained from the steel joint were in very good agreement with previous results from neutron diffraction measurements, although they were still noisier because of inferior grain statistics.
The Role of Plasticity Theory on the Predicted Residual Stress Field of Weld Structures
Authors: Muránsky Ondrej , Hamelin Cory J. , Smith Mike C. , Bendeich Phillip J. , Edwards Lyndon
Published: November 2013

Constitutive plasticity theory is commonly applied to the numerical analysis of welds in one of three ways: using an isotropic hardening model, a kinematic hardening model, or a mixed isotropic-kinematic hardening model. The choice of model is not entirely dependent on its numerical accuracy, however, as a lack of empirical data will often necessitate the use of a specific approach. The present paper seeks to identify the accuracy of each formalism through direct comparison of the predicted and actual post-weld residual stress field developed in a three-pass 316LN stainless steel slot weldment. From these comparisons, it is clear that while the isotropic hardening model tends to noticeably over-predict and the kinematic hardening model slightly under-predict the residual post-weld stress field, the results using a mixed hardening model are quantitatively accurate. Even though the kinematic hardening model generally provides more accurate results when compared to an isotropic hardening formalism, the latter might be a more appealing choice to engineers requiring a conservative design regarding weld residual stress.
CDC Glas oilseed flax
Authors: Booker H. M. , Rowland G. G. , Rashid K. Y.
Published: November 2013

Booker, H. M., Rowland, G. G. and Rashid, K. Y. 2014. CDC Glas oilseed flax. Can. J. Plant Sci. 94: 451–452. CDC Glas, a medium-late maturing oilseed flax (Linum usitatissimum L.) was released in 2012 by the Crop Development Centre, University of Saskatchewan, Saskatoon, Saskatchewan. This cultivar has medium oil content, medium oil quality, medium seed size, good lodging resistance and high seed yield in all the soil zones of the prairies. It is immune to North American races of rust caused by Melampsora lini, moderately resistant to wilt caused by Fusarium oxysporum f. sp. lini and moderately resistant to powdery mildew caused by Oidium lini.
Testing for soil carbon saturation behavior in agricultural soils receiving long-term manure amendments
Authors: Feng W. , Xu M. , Fan M. , Malhi S. S. , Schoenau J. J. , Six J. , Plante A. F.
Published: November 2013

Feng, W., Xu, M., Fan, M., Malhi, S. S., Schoenau, J. J., Six, J. and Plante, A. F. 2014. Testing for soil carbon saturation behavior in agricultural soils receiving long-term manure amendments. Can. J. Soil Sci. 94: 281–294. Agricultural soils are typically depleted in soil organic matter compared with their undisturbed counterparts, thus reducing their fertility. Organic amendments, particularly manures, provide the opportunity to restore soil organic matter stocks, improve soil fertility and potentially sequester atmospheric carbon (C). The application of the soil C saturation theory can help identify soils with large C storage potentials. The goal of this study was to test whether soil C saturation can be observed in various soil types in agricultural ecosystems receiving long-term manure amendments. Seven long-term agricultural field experiments from China and Canada were selected for this study. Manure amendments increased C concentrations in bulk soil, particulate organic matter+sand, and silt+clay fractions in all the experiments. The increase in C concentrations of silt+clay did not fit the asymptotic regression as a function of C inputs better than the linear regression, indicating that silt+clay did not exhibit C saturation behavior. However, 44% of calculated C loading values for silt+clay were greater than the presumed maximal C loading, suggesting that this maximum may be greater than 1 mg C m−2for many soils. The influences of soil mineral surface properties on C concentrations of silt+clay fractions were site specific. Fine soil particles did not exhibit C saturation behavior likely because current C inputs were insufficient to fill the large C saturation deficits of intensely cultivated soils, suggesting these soils may continue to act as sinks for atmospheric C.
Spectral properties of a class of random walks on locally finite groups
Authors: Bendikov Alexander , Bobikau Barbara , Pittet Christophe
Published: November 2013

We study some spectral properties of random walks on infinite countable amenable groups with an emphasis on locally finite groups, e.g. the infinite symmetric group

S_{\infty}

. On locally finite groups, the random walks under consideration are driven by infinite divisible distributions. This allows us to embed our random walks into continuous time Lévy processes. We obtain examples of fast/slow decays of return probabilities, a recurrence criterion, exact values and estimates of isospectral profiles and spectral distributions.
Hyperbolic hydra
Authors: Brady Noel , Dison Will , Riley Timothy R.
Published: November 2013

We give examples of hyperbolic groups with finite rank free subgroups of huge (Ackermannian) distortion.