bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Group Differences of Online Shopping Based on Data Mining
Authors: Zhao Yang , Wang Lin
Published: January 2015

In the face of complex problems of implementation intentions predict the online shopping behavior, we conducted a preliminary exploration of group differences intention on the online shopping behavior using data mining method. The research results show, different types of temperament, personality, gender and living area in online shopping experience and behavior intention have common characteristics of groups, and different groups have obvious difference in online shopping behavior . Finally, this paper combined with large data and the mobile Internet era characteristic, put forward to large data comprehensive online shopping search behavior index, O2O business model as the foundation, the prospect of research on the construction of implementation intention theory of online shopping behavior.
Study on Intrusion Detection System Based on Data Mining
Authors: Mao Jiang Kun , Zhan Fan
Published: January 2015

Intrusion detection system as a proactive network security technology, is necessary and reasonable to add a static defense. However, the traditional exceptions and errors detecting exist issues of leakage police, the false alarm rate or maintenance difficult. In this paper, The intrusion detection system based on data mining with statistics, machine learning techniques in the detection performance, robustness, self-adaptability has a great advantage. The system improves the K-means clustering algorithm, focus on solving two questions of the cluster center node selection and discriminating of clustering properties, the test shows that the system further enhance the detection efficiency of the system.
An Improved Task and Role-Based Access Control Model with Multi-Constraint
Authors: Wang Bao Yi , Zhang Wen Xue , Zhang Shao Min
Published: January 2015

A combination of Task and Role-based Access Control with multi-constraint is put forward in this paper. It is designed to solve problem of access control management about collaborators in workflow system, whose difficulties lie in complex authorization and low users efficiency. It combines the tasks and roles, classifies tasks, simplifies permissions management, defines the mutually exclusive roles and binding tasks and formulates dynamic users allocation policies by establishing a users execution history table to improving the efficiency. Finally, a specific dynamic access control design is given for electric power enterprise equipment maintenance management workflow, the given example shows that the model and algorithm satisfies the principle of least permission and separation of duties and ensures the workflow system to execute tasks safely and efficiently.
Technology on Computer Remote Control and Hiding Method
Authors: Liu Hua Chen
Published: January 2015

This paper makes study on hiding technology and remote control technology of Trojan, gives design and realization of computer remote control system that can carry out monitoring on remote computer based on the main hiding method of Windows platform Trojan. This system can pass through firewall and unobtrusively implant into controlled computer as well as make real-time remote control on controlled computer according to command of control end.
Property Analysis for Microwave Absorbing Material Based on Effective Medium Model
Authors: Liu Heng , Zeng Zhao Yang , Wu Chao , Lv Xu Liang , Jia Qi
Published: January 2015

In order to predict the absorbing properties of absorbing material effectively in theory, effective media theory was applied to reduce the effective electromagnetic parameters of several composite absorbing agents under different volume ratio. The comparison with experimental data shows that this method can well forecast the absorbing properties of absorbing material. For practical absorbing agent and penetrating agent, this method can compute the optimal proportioning and material thickness.
Research on Microstructure Structure Formation Mechanism of Cement-Emulsifying Asphalt and Waterborne Epoxy Cementing Materials
Authors: Shen Fan , Zhao Ming Yu , Lu Ji , Ding Qing Jun
Published: January 2015

Cement-Emulsifying Asphalt and waterborne Epoxy (CAE) cementing materials meet requirement for paving in steel bridge deck pavement materials, which possessing good flexibility, high temperature stability and cohesiveness to steel plate, and the microstructure model and structure formation mechanism of CAE mortar was researching in this paper. The results of the study show that, CAE mortar forms the asphalt and epoxy interpenetrating network structure which connect with cement, and the forming process contains four stage, which is dispersedness, interaction, structure formation and strength development. This structure makes CAE concrete give full play to such characteristic, which is good adhesion of cement with asphalt and epoxy resin, good temperature stability and high bonding strength of epoxy resin, good toughness of asphalt.
Research on Operating Speed Based on Driver and Vehicle Response
Authors: Hu Xiao Rui , Xiong Jian
Published: January 2015

For the sake of researching the changes of operating speed when road condition alters, a calibrated model of operating speed was submitted. The model is based on the existed operating speed model fitting to experiment data, complemented and revised by taking vehicle dynamics and driver behaviors in to consideration. The driver model is divided in two parts: decision-making and manipulation. Decision-making contains the limitation of current road condition and forward road condition; manipulation indicates how driver control the throttle and brake to make the vehicle acceleration reaches desired acceleration. Simulation analysis and experimental results show that the model can regenerate how vehicle speed changes according to road condition alters, at the same time demonstrate driver’s manipulation on throttle and brake.
Structure Studies on Order Assemblage of CadmiumII Isophthalicacid Benzimidazole Complexes
Authors: Wang Guang Hui , Song Da Jun , Tian Hong Xiao , Gao Jian , Liu Yu
Published: January 2015

The CadmiumII Isophthalicacid Benzimidazole complex [Cd2(C8H4O4)2 (C7H6N2)4(H2O)3], Triqua-bis (isophthalicacidato-O,O')-tetra (benzimidazole) bis (CadmiumII),the CdII atom is coordinated by two isophthalicacid anions and two benzimidazole and one water molecule in a distorted octahedral configuration with six-coordinations geometry. And one isophthalicacid ligand chelates to the CdII atom through its one carboxylic O atoms, but the other isophthalicacid ligand chelates to the CdII atom through its two carboxylic O atoms. The same as another CdII atom. So we get a Binuclear CdII metal complexe. The fact clearly suggests not so much significant contribution from the electrostatic interaction in the Cd-O bonding in bidentate Binuclear CdII metal complexes as we gotten in mononuclear MnII metal complexes. Adjacent complex link to each other via hydrogen bonds forming the three-dimensional supramolecular structure.
Survey of Sulfur Dioxide Residues in Litchi Preservation Process in Hainan Province
Authors: Qi Ning Li , Li Tao , Zhou Hui Ling , Yang Chun Liang
Published: January 2015

Lychee (LYchee chinensis) is a tropical, subtropical climate zone of special fruit, the“southern good fruit” ,China is the world’ largest producer of litchi, commercial long history of cultivation. Is also one of the most competitive on the international fruit market fruit present. Litchi fruit flavor is unique, colorful, nutrient-rich, loved by the people. But its fruit ripening is in the hot season, due to post-harvest browning (loss of red) and fruit rot rapid deterioration leaving the fruit, post harvest life at room temperature is less than three days, this short postharvest life strictly limits litchi long-distance transportation, sale and consumption.
Equivalent Stress Cycles Based on District Heating Operation
Authors: Dong Yuan Yuan , Wang Fei , Lei Yong Gang , Wang Guo Wei
Published: January 2015

We investigated supply water temperature of the district boiler between 2006 and 2014.And calculated the design life cycles of heating pipeline based on the district boiler as the heat source. Then superposed the number of the design life cycles caused by pipelines accidents and district boiler of the main trunk lines, distribution lines and subscriber connection line, we obtained the design life cycles of different heating pipes. This result can provide a basis for fatigue damage analysis of heating pipe fittings.
Numerical Analysis of Cone-Jet Based on EHD Micro-Jet Technology
Authors: Wang Sha Sha , Tang Zheng Ning , Miao Bin Ying , Chen Jia Xiang
Published: January 2015

EHD micro-jet can deposit rule and functional patterns in a direct, continuous and controllable manner, and has the advantages of good compatibility, high resolution and simple structure, thus becoming a cost-effective and high-efficiency technology. Through numerical method, obtain the three dimensional model of cone-jet and emphasize the correlation of sediment diameter and PEO concentration. The theoretical graphics agree well with the experimental data, which can explain and provide some theoretical basis for the experiments.
A Study on Liquid Level Measurement and Control System Based on Single Chip Microcomputer
Authors: Jiang Jun Hai , Xiao Zhi Guo
Published: January 2015

Introduces a method of using STC89C51 microcontroller as the control core, the system capacitance sensor for measuring and controlling liquid level. Through the analysis of field level condition, by using the capacitance sensor to detect the liquid level of a field physical quantity, and then detected information through the processing circuit, transmitted to the microcontroller, the use of computer technology, the level data collected in the field of real time signal processing. Through the application of the system, achieved the industrial level of indirect measurement, automatic control and management purposes.
Object Tracking System Based on Artificial Vision Algorithms
Authors: Mauledoux Mauricio M. , Hernandez Carlos , Segura Crhistian C.G. , Aviles Oscar F.
Published: January 2015

This document describes the architecture of a tracking system with two degrees of freedom (pan and tilt), endowed with artificial vision to follow the path of a moving object. The mechanism with a fixed base was designed to cover lateral and vertical ranges of movement, similar to the visual field in humans, limiting its depth by the resolution of the camera. The object that defines the motion path presents color uniformity across its surface, becoming the main feature in which the recognition and tracking algorithm were based. The tracking is performed by reducing the error between the object position and the reference axis of the camera. Several tests were carried out to evaluate the control and visual systems and to illustrate the behavior of the proposed methods.
The Application of Finite Element Simulation on Sheet Plate Modal Acoustic Emission Testing
Authors: Du Hao , Liu Yan
Published: January 2015

Based on mode acoustic emission theory, the paper uses dynamic finite element software ANSYS / LS-DYNA to simulate modal acoustic emission test, and obtains the Lamb wave propagation analog signal on sheet plate; By analyzing the analog signal, it determines the signal frequency and the Lamb wave arrival time of signal receiving point, then determines the guide wave group velocity at this frequency, and uses the method of time difference analysis to determine the dispersion curve. Comparing the simulation dispersion curve with the theoretical curve, the study has shown both curves are consistent and it is feasible to simulate modal acoustic emission signals with the finite element.
The Modulation Index Optimization of Microwave Photonic Frequency Conversion Using Double-Sideband Suppressed-Carrier and Balance Detection
Authors: Jiang Wei , Tan Qing Gui , Liang Dong , Li Xiao Jun , Zhu Zhong Bo
Published: January 2015

In this paper, on basis of DPMZM (Dual-Parallel Mach-Zehnder Modulator), an approach for microwave photonic frequency conversion using DSSC(double-sideband suppressed-carrier) and balance detection is demonstrated. DSSC and balance detection were used to realize high harmonic suppression, and achieve frequency conversion signal with high power and high spectrum purity. In addition, theoretical analysis and simulation results show that the optimal modulation index is m1=2, m2=1.81, and the harmonic suppression is greater than 30dB.
Effect Evaluation of Video Surveillance System on the Basis of Principal Component Analysis
Authors: Zhu Tao , Hong Wei Jun
Published: January 2015

The effect evaluation of video surveillance system is important for the effect of expected protection on the system. A comprehensive effect evaluation index system of video surveillance system is established. The Principal Component Analysis (PCA) method is applied on the established index system to obtain a new evaluation index system. It is proved in instances that the effect evaluation method of video surveillance system with the application of the index system is capable of evaluating the video surveillance system effectively and quantitatively. The protective effect of the video surveillance system is evaluated objectively on the basis of the new index system with the PCA.
Ionosphere Delay Correction by Using Multifrequency Measuring Data
Authors: Wu Yin Lin , Yi Wei Wei
Published: January 2015

Traditional method to correcting ionosphere delay error faces the problem of accuracy and universality. This paper put forward by using multifrequency measuring data to correct ionosphere delay error. The precision of satellite positioning data processing can be improved effectively by dual-frequency first order correct and three frequency second orders correct. The experiment shows that method in this paper has higher precision and more universal than traditional way.
Application of the Laser Alloy Cladding on Re-Manufacturing of the Machine Tool Axis
Authors: Zhang Yan Li , He Bin Feng , Dai Jun
Published: January 2015

In order to obtain better surface quality for swear parts of machine tools, the laser alloy cladding technology is used. The two alloy powders are laser cladded on axis parts separately, which is under different process parameters, such as laser power, feed rate and scanning speed etc. The microstructure and hardness of cladding layers are analyzed by using scanning electron microscope and hardness tester. Generally, the surface quality is improved apparently. Under the similar laser power and powder quantity, the thickness of Ni60 cladding layer is much larger than Fe60. The hardness of Ni60 layer is higher than that of Fe60, while both of them are all higher than 45 steel substrate. In conclusion, the parameters of sample 2 are optimal.
Research on Blasting Vibration Signal Denoising Based on Lifting Scheme
Authors: Xie Quan Min , Zhang Huai Zhi , Gao Ying , Cao Hong An , Guo Sheng Qiang , Zhong Ming Shou , Liu Hao Quan
Published: January 2015

Considering lifting scheme and traditional wavelet packet transform principle, The optimal lifting wavelet packet threshold denoising algorithm was introduced. Experimental blasting vibration signal was decomposed by optimal lifting wavelet packet, and noise components in blasting vibration measured signals were filtered successfully. Research shows that, lifting wavelet package transform can effectively remove noise components, and it laid an important foundation for lifting algorithm will be introduced into the analysis field of blasting vibration effects and other mechanical vibration signal.
Research on the Realization of the Maximum Benefit of Thermal Power
Authors: Chen Jia Min
Published: January 2015

First, Anti-balance method is used to build the model of q2,q3,q4 to figure out the Function expression of q2+q3+q4 .when q2+q3+q4 gets the minimum, the corresponded to the excess air ratio is the best excess air ratio. The excess air ratio is related to the load of boiler, so the function image describing the relationship between q2+q3+q4 and excess air ratio under the different load of 192.3MW, 215.8MW, 245.3MW and 298MW are made to get the best excess air ratio. Second, based on the model before, new variables q5 and q6 are added to complete the function formula of the efficiency and the excess air ratio, and four function image will be drew to show the tends. Finally, based on the conclusions above, smoke vents oxygen content can take the place of excess air ratio to achieve the purpose of monitoring the boiler in real time.
Maneuvering Target Tracking Based on Radar/ESM Sensors
Authors: Li Xing Xiu , Wu Pan Long
Published: January 2015

A novel interacting multiple model based on BLUE filter (IMM-BLUE) for tracking a maneuvering target using radar/ESM heterogeneous sensors is presented in this paper. Under the architecture of the proposed algorithm, the interacting multiple model (IMM) deals with the model switching, while the BLUE filter accounts for non-linearity in the dynamic system models. The simulation results show that the presented IMM-BLUE has higher tracking precision than the IMM-DCM, and IMM-EKF.
Imaging Characteristics Analysis of GLV-Based Thermal CTP System
Authors: Miao Bin Ying , Tang Zheng Ning , Wang Sha Sha , Chen Jia Xiang
Published: January 2015

The Grating Light Valve (GLV) is a spatial light modulator based on Micro Electro Mechanical Systems (MEMS), and it has been successfully applied in the computer-to-plate (CTP) system by modulating laser beams. Fast modulation rate, a mass of pixels, and high power handling capability of the GLV device increase imaging speed. Digital working states, combine of two GLV pixels and exact beam shape improve imaging quality. Numerical calculation and graph analysis using MATLAB software show that imaging quality of GLV-based thermal CTP system is higher than that of traditional acousto-optic modulator scanning system.
Comparative Study of ECG Based Identification
Authors: Zheng Gang , Wang Ya Rong , Qin Qin , Li Yang , Li Zhong Yi
Published: January 2015

ECG waveform has becoming a new kind of Biometric signal for person identification recently. The identification procedure was based on the establishment of person's own ECG waveform template, one beat of ECG waveform was used as analysis data, 15 persons were involved in the study. In the paper, several algorithms are compared for their ability to identify person. The algorithms are coefficient threshold method and Euclidean distance threshold method, their measurement was based on linear distance. Hausdorff distance threshold method as a non linear distance was also compared. Except this, SWM(support vector machine) was also introduced to do the identification work. From the experimental results, Euclidean distance threshold method and the Hausdorff distance threshold method reached same level of identification, the acceptance rate is around 76.0%, the correlation coefficient threshold method reached 86.0%. As to the SVM, its acceptance rate near 96.0%. Although the amount of experiment data was relatively small, but the result give the researching in good promising and better prospecting.
A UAV Longitudinal Control System Design Based on QFT
Authors: Yong Chen , Yu Jin Yong , Zhang Chun Ping , Ma Hong Wei
Published: January 2015

In this paper, the basic principle and design procedure of the quantitative feedback theory (QFT) are summarized, then control system of a UAV is designed with the QFT theory. The QFT theory can solve the robust design problem of the UAV control system due to the model parameters uncertainty perfectly. And a method of robust design for UAV is put forward from engineering application perspective. Compared with traditional control method, the simulation result shows that the control system designed by the QFT theory not only has more perfect control effect but has significant value in the engineering application.
The Reliability Analysis of Mechanical Leg (2UPS+UP) Based on a Discrete Time Repairable Markov Model
Authors: Zhang Jia Lei , Jin Zhen Lin , Zhao Dong Mei
Published: January 2015

We have analyzed some reliability problems of the 2UPS+UP mechanism using continuous Markov repairable model in our previous work. According to the check and repair of the robot is periodic, the discrete time Markov repairable model should be more appropriate. Firstly we built up the discrete time repairable model and got the one step transition probability matrix. Secondly solved the steady state equations and got the steady state availability of the mechanical leg, by the solution of the difference equations the reliability and the mean time to first failure were obtained. In the end we compared the reliability indexes with the continuous model.
Research on Devices of Fault Setting and Eliminating for CNC Machine
Authors: Zhang Pei , Zuo Wei
Published: January 2015

A device of fault setting and eliminating with AT89S52 Single Chip Micyoco (SCM), was developed as the control core for CNC machine tools. The device has an independent electrical cabinet and an IR remote control. It can set and eliminate the circuit fault and the system parameter fault of CNC machine tools. Practice indicates that the device performs very well with good quality.
The Evaluation of COAs Based on Stochastic Interval Weighted Sum Method
Authors: Diao Lian Wang , Liang Wei Tai
Published: January 2015

An important element of military operations is the evaluation of courses of action (COAs) in order to overcome emergency situations. In this kind of decision-making situation, it is important to consider several criteria to evaluate the various COAs, and to compare and rank the COAs according to their ability to meet the selected criteria. It is often necessary to balance the importance of these criteria accordingly to commander’s viewpoints. A new method has been proposed for evaluating the COAs that is based on the possibility calculus known as stochastic interval weighted average operator. The method first presents the attributes and its weights by stochastic interval numbers, so empirical and statistical information, as well as for opinions and judgments made by commanders and analysts, all can be integrated, second, the random numbers of sums of independent variables can be generated by Monte Carlo method, lastly, the comparing and sorting of COAs are realized by random variable Comparison. An example is given to demonstrate the feasibility and practicability of the proposed method.
Inducting Fuzzy Decision Tree Based on Discrete Attributes through Uncertainty Reduction
Authors: Xiao Tao , Huang Dong Mei , Zhou Xu , Zhang Ning
Published: January 2015

In this paper, we give a fuzzy decision tree (simply FDT) induction algorithm, named FDTAmbig, to handle the classification with discrete attributes through the uncertainty reduction. In FDTAmbig, the uncertainty is measured with classification ambiguity. FDTAmbig selects the attribute which will cause the further reduction of uncertainty as the expanded attribute for each decision node. The experimental result shows that FDTAmbig has the better generalization capability in comparison with the FDT induced with classification entropy (FDTEntr).
Preparation and Photocatalytic Activity of TiO2-Copper Oxides Composite Coatings by Mechanical Coating Technique and Heat Oxidation
Authors: Lu Yun , Hao Liang , Matsuzaka Kou , Yoshida Hiroyuki , Guan Su Jun , Chen Jin Xiang
Published: January 2015

Photocatalytic TiO2–Copper oxides composite coatings were prepared by the mechanical coating technique (MCT) and subsequent heat oxidation. The results showed that Cu particles were mainly adhered to the surfaces of the Ti–Cu composite coatings. After heat oxidation,the Ti coatings were partly oxidized to rutile TiO2 and a Ti–TiO2–Cu2O–CuO composite microstructure was formed. These composite coatings had relative high photocatalytic activity because of the formation of the TiO2–Ti composite microstructure and TiO2–Cu2O–CuO p–n heterojunctions.
Implementing Augmented Reality in Construction Projects
Authors: Kivrak Serkan , Arslan G. , Tuncan Mustafa
Published: January 2015

Augmentedreality,whichhasbeendesignedtoimprovetheservicesinmanyapplicationdomainssuchasschooleducation,militarywarfare,militarytrainings,industrialmaintenance,retailandmedical,canbedefinedinthesimplestformasaugmentingtherealworldwithinformationfromthevirtualworld.Themainaimofthisstudy,whichpresentsanoverviewofanongoingproject,istodevelopaninnovativemethodbymakingaconstructionworker,foreman,equipmentoperatororasiteengineerwatchaverycomprehensiveandinformativeanimationwhichwillenablethesaidstafftoperformorsuperviseallthephasesoftheactivityheorsheisinchargeforinamoreefficient,productive,saferandqualifiedmannerbymeansofsmartglassesusingaugmentedrealitysystems.Basictrainingsaboutthesystemwillbegiventotargetgroup,i.e.constructionworkers,foremen,operators,siteengineersandmanagersworkingintheconstructionsitestoapplythesystemonsitesafterallthesystemwastested.Afterthetestings,todeterminetheeffectivenessofthissystem,semi-structuredinterviewsandsurveyquestionnaireswillbeconductedamongthementionedtargetgroup.Therefore,thepotentialbenefitsofthissystemtotheconstructionindustrycanbedetermined.Therearerelativelyfewstudiesabouttheimplementationsofaugmentedrealitytechnologyinconstruction.Theoutputstobeattainedintheendofthestudyhavethepotentialofimprovementoftime,cost,qualityandsafetyparameters.
Enhanced Surface Hardness by Boron Diffusion in Martensitic Stainless Steel via Cathodic Reduction and Thermal Diffusion Based Boriding (CRTD-Bor)
Authors: Kartal Sireli G. , Yelkarasi C. , Ozkalafat P. , Timur S. , Urgen M.
Published: January 2015

In this study, a developed new boriding method called as “Cathodic Reduction and Thermal Diffusion based Boriding” (CRTD-Bor) was applied to increase the surface hardness of 400 series steels. The cross-sectional examination of borided steel revealed that the boride layers consisted of single phase Fe2B. A dense and continuously 25μm thick Fe2B layer could be formed after 20 minutes of CRTD-Bor. The grown boride layer exhibited 1500±200 HV on top, and gradually decreased to the matrix (325 ± 25 HV).
Optimal Design of a Magnetic Take-Up Roll for Amorphous Ribbon
Authors: Song Yan Ming , Yang Yang
Published: January 2015

Take-up roll is a key component employed in amorphous ribbon production line. The roll should supply enough adhesion fore to take up the flying ribbon with a high speed. In this paper, a novel magnetic take-up roll (MTUR) is proposed. Optimize the structure parameters with a finite element method to obtain enough and stable magnetic adhesion force (MAF). The different simulation models are established to calculate the performances of the MTUR. A prototype of the MTUR was manufactured and tested. Experiments prove that the optimal MTUR can generate MAF to overcome the resistant force that amorphous ribbon suffering in take-up process in certain air gap range
Aluminium Alloy 8011: Surface Characteristics
Authors: Rahimi Maral , Fojan Peter , Gurevich Leonid , Afshari Alireza
Published: January 2015

Aluminium alloys are the predominant materials in modern industries. Increased knowledge about the surface characteristics of bare aluminium can enhance the understanding about how to optimize the working conditions for the equipment involving aluminium parts. This work focusses on the properties of native surface of aluminium alloy 8011, which is the main construction material for the production of air-to-air heat exchanger fins. In this study, we address its water wettability, surface roughness and frost formation in different psychometric parameters. The contact angle measurements revealed that this aluminium alloy exhibits a relatively high contact angle of about 78 degree, i.e. is not wetted completely. AFM measurements revealed significant surface roughness of typical heat exchanger fins. The thickness of formed frost was studied in relation to the wettability, humidity and the cold surface temperature.
Emissivity Caracterization in Stainless Steels Alloys for Application in Hidroeletric Turbines
Authors: Santos Matheus Tabata , Muterlle Palloma Vieira , de Carvalho Guilherme Caribé
Published: January 2015

Emissivity is the ratio between the radiant hemispherical power emitted by a real body, at an absolute temperature, and the radiant hemispherical power emitted by a black body at the same temperature. The energy emitted is proportional to the fourth power of the object ́s temperature. Emissivity may vary from 0 (reflected by a mirror) to 1.0 (black body theory). Studies are being carried out at the University of Brasilia to investigate the microstructural behavior of materials used in the repairing of hydroelectric turbines, after several thermal cycles of welding. These studies use thermographic techniques for monitoring the temperature and require that the correct emissivity value for specific materials and surface conditions are used in order to guaranty that the temperatures reported by the radiometric sensors are consistent with the actual temperatures. This study aims to validate an experimental methodology for evaluating the emissivity of the steel ASTM A 743 CA6NM and the AWS 410 NiMo as deposited by a GMAW process at temperatures ranging from 100oC to 1000oC. The experiment consists of heating a small sample of the material with an oxyacetylene torch while a thermocouple, welded on surface of the sample, an infrared sensor and a thermographic camera monitor the surface temperature. During the heating and the cooling process, the sample surface is protected from the air by an argon gas flow directed towards the visualized area. Results consistent with the reported in the literature for similar materials were attained and curves of the emissivity “versus” temperature for the tested materials were produced, providing a basis for proper thermographic temperature monitoring.
Adaptive Control Approaches for Nonlinear Systems: Retrospect and Prospects
Authors: Rao Hong Liang
Published: January 2015

This paper discusses the state-of-art of adaptive control approaches for nonlinear systems to date and presents a new classification framework, in which the existing adaptive control approaches can be broadly classified into two categories: model-driven methods and data-driven methods. The principle, main research progress, and inherent problems of these methods are reviewed. Finally, some practical considerations and future directions are also briefly explored and discussed.
Identification of Multivariable Nonlinear Dynamic System Based on PID Neural Network
Authors: Shu Hua , Shu Huai Lin
Published: January 2015

System identification is the basis for control system design. For linear time-invariant systems have a variety of identification methods, identification methods for nonlinear dynamic system is still in the exploratory stage. Nonlinear identification method based on neural network is a simple and effective general method that does not require too much priori experience about the system to be identified. Through training and learning, the network weights are corrected to achieve the purpose of system identification. The paper is about the identification of multivariable nonlinear dynamic system based on PID neural network. The structure and algorithm of PID neural network are introduced and the properties and characteristics are analyzed. The system identification is completed and the results are fast convergence.
A Hardware Implementation of Real Time Lossless Data Compression and Decompression Circuits
Authors: Yang Le , Guo Zhao Yang , Yong Shan Shan , Guo Feng , Wang Xin An
Published: January 2015

This paper presents a hardware implementation of real time data compression and decompression circuits based on the LZW algorithm. LZW is a dictionary based data compression, which has the advantage of fast speed, high compression, and small resource occupation. In compression circuit, the design creatively utilizes two dictionaries alternately to improve efficiency and compressing rate. In decompression circuit, an integrated State machine control module is adopted to save hardware resource. Through hardware description and language programming, the circuits finally reach function simulation and timing simulation. The width of data sample is 12bits, and the dictionary storage capacity is 1K. The simulation results show the compression and decompression circuits have complete function. Compared to software method, hardware implementation can save more storage and compressing time. It has a high practical value in the future.
Fuzzy Power Flow Based on Fuzzilized Matpower
Authors: Wang Bo Ran
Published: January 2015

In the last several decades, a couple of fuzzy power flow algorithms were presented to deal with the uncertainties in power grid. But there is no a functional simulation tool introduced to simplify the calculation. This paper presents a simulation tool, Matpower, under one of the algorithms to do the fuzzy power flow calculation. The algorithm gives the user the possibility to specify fuzzy numbers to represent the possible behavior of loads and generations and outputs fuzzy membership functions for voltage magnitudes and phases, active and reactive power flows and generations. Matpower, as a simulation tool, was modified to handle fuzzy numbers and show fuzzy results. In a final section, we present results obtained with a case study based on a real power system to illustrate and highlight details of the proposed algorithm. Suggestions for future implementation of the fuzzy Matpower are also summarized.
An Efficient Design for Interleaved Active Clamp Flyback Used in Grid-Connected Solar Microinverter
Authors: Hou Yan Jin , Bai Ming , Cui Xin Yu , Cao Yan
Published: January 2015

This document presents a high efficient method for interleaved active clamp flyback used in microinverter. The flyback converter was selected as a single stage topology that can boost the low PV panel voltages to a rectified AC output. How to handle the leakage energy for high efficiency and protecting the MOSFET ,how to calculate the parameter and choose the compenent also be showed in this document.
Conductivity and Dielectric Analysis of Cellulose Based Solid Polymer Electrolytes Doped with Ammonium Carbonate (NH4CO3)
Authors: Sohaimy M.I.H. , Isa Mohd Ikmar Nizam
Published: January 2015

The present work investigated the effect of carboxy methylcellulose (CMC) solid polymer electrolytes doped with ammonium carbonate (AC) prepared from solution cast technique. The CMC-AC solid polymer electrolytes system has been analyzed using EIS to understand its conductivity and dielectric behavior at temperature range of 303 K to 363 K. The highest conductivity achieved at room temperature (303K) is 7.71 x 10-6S cm-1doped with 7wt.% of AC and all samples follows Arrhenius behaviour. The dielectric constant (εr) value was found to be dependent of ionic dopant.
An Efficient Method for Managing CoMP Cooperating Set Based on Central Controller in LTE-A Systems
Authors: Bu Hua Wen , Xu Yao Hua , Yuan Zhi , Hu Yan Jun , Yi Hui Yue
Published: January 2015

“Authorized Shared Access” (ASA) is a spectrum management policy which enables the secondary system to opportunistically utilize the licensed spectrum of the primary systems. In the coexistence of LTE-A system with primary systems, one of the constituent cells of the CoMP cooperating set may be affected because it has to vacate the ASA frequency for it overlaps with the protected area of the primary system. As a result, the CoMP cooperating set will be changed, and the operation of the CoMP can’t be continued execution. In this case, the UE’s QoS can’t be guaranteed and even the UE experiences call drop when using the traditional method. In this paper, by utilizing a central controller, we propose an efficient method for managing CoMP cooperating set on the ASA spectrum. The change information about the affected cell is sent to the serving cell of the CoMP through the central controller in advance. Then, the serving cell may reselect a new CoMP cooperating set or determine CoMP information indicating whether the CoMP cooperating set will be continued based on this change information, which effectively ensures continued execution of CoMP and the UE’s QoS. Simulation results show that the proposed method can provide better performance compared with the traditional method.
A Routing Protocol for Emergency Communication Based on Load Balancing
Authors: Han Hui , Zhang Hong De , Wang Yang
Published: January 2015

Ad-hoc communications is a mobile communication networks and computer networks combine with no infrastructure support, and network survivability and flexibility is strong, especially suitable for emergency communication. As the existing mobile ad hoc network routing protocols lack of network load balancing capabilities, this paper proposed a routing protocol based on load balancing LBBR (Load Balancing Based Routing). Simulation results shows that, LBBR can improve the success rate of packet transmission, reducing the average end to end delay, thus effectively improving network performance.
Hybrid Accelerated Method via Volume-Surface Integral Equation for Efficient Calculation of Monostatic RCS
Authors: Chen Jia Qi , Zhang Yue Yuan
Published: January 2015

A novel efficient hybrid accelerated method is proposed for the fast analysis of the monostatic electromagnetic scattering problems arising from volume-surface integral equations (VSIE) formulation. In the first step, by utilizing the low rank property, several largest eigenvalues and corresponding eigenvectors of the multiple right hand sides can be computed and saved efficiently by adaptive cross approximation (ACA) algorithm. The iterative solution of linear equations is required at these principle eigenvectors. Compared with solving linear equations at each angle repeatedly, the proposed method is able to greatly reduce the number of equations. In the second step, a disturbed symmetric successive over-relaxation (D-SSOR) preconditioner is constructed to speed up the convergence rate of iterative methods. Numerical results demonstrate that the present method can reduce the computational time significantly for monostatic VSIE calculation with high accuracy.
An Image Segmentation Calculation Based on Differential Box-Counting of Fractal Geometry
Authors: He Tao , Cheng Long Fei , Wu Qing Hua , Wang Zheng Jia , Yang Lian Gen , Xie Lang Yu
Published: January 2015

Differential box-counting of fractal geometry has been widely used in image processing.A method which uses the differential box-counting to segment the gathered images is discussed in this paper . It is to construct a three-dimensional gray space and use the same size boxes to contain the three dimensional space.The number of boxes needed to cover the entire image are calculated .Different sizes of boxes can receive different number of boxes, so least squares method is used to calculate the fractal dimension. According to the fractal dimension parameters, appropriate threshold is chose to segment the image by using binarization .From the handle case of bearing pictures can be seen that image segmentation based on differential box-counting method can get clear image segmentation .This method is easy to understand, to operate, and has important significance on computer image segmentation .
A VAD-Based Variable Order Affine Projection Algorithm for Acoustic Echo Cancellation
Authors: Liu Fu Rong , Zhou Yi , Yin Shi Shu
Published: January 2015

This paper proposes a new variable order affine projection algorithm for acoustic echo cancellation. By exploiting an efficient voice activity detection technique, the proposed algorithm can distinguish the significant and insignificant input data periods. It can thus switch between the higher and lower algorithm orders in these two situations, respectively. Hence, input data reusing can enhance convergence with more input excitation and the computation cost can be saved when the input is relatively weak. Simulations results verify the effectiveness of the proposed algorithm.
The Kinematic Analysis of Double Water Jets Ship
Authors: Han Zhao Lin , Chen De Long
Published: January 2015

This document explains hydrodynamic force of water jet propulsion and kinematic characteristics of double water jets ship. Firstly, study on the water jet thrust based on the theorem of momentum. Then discuss the hydrodynamic performance of the water jet reversing bucket, calculate the backing force produced in the condition of different flow rate and nozzle angle. On the basis of hydrodynamic analysis of water jet, we next explore the various motion modes of double water jet propulsion ship, especially kinematic analysis of ship’s in-situ rotary movement and transverse movement.
The Concept and the Contents of Process Fluid Mechanics
Authors: Song Peng Yun , Ma Ai Lin
Published: January 2015

Fluid mechanics is the mechanics of fluids, concerned with the motion of fluids and the forces associated with that motion. A Process is a series of operations which produce a physical or chemical change or biotransformation in the nature of a material. Process industries are those industries in which processes have been taken placed. Process engineering stems from chemical engineering, having much wider ranges and much deep content, and focusing on the design, operation and maintenance of process in process industries. Process fluid mechanics may be interpreted as the fluid mechanics related to process industries and/or process engineering, or as the fluid mechanics used for the process industries or process engineering, or as the knowledge of fluid mechanics should be mastered by the process engineers and process researchers or process scientists. Process fluid mechanics can be divided into physical process fluid mechanics, chemical process fluid mechanics, and biological process fluid mechanics.
Finite Element for Simulating BHA-Casing-Rock Interactions
Authors: Bagadi Yousif E.A. , Gao De Li , Fadol Abdelwahab M.
Published: January 2015

The Bottom Hole Assembly (BHA) design is consider a very important subject in the planning of any oil and gas well, and any mistake in BHA design will lead to additional increase in drilling cost, due to corrections needed in well trajectory.This study was intended to predict the trajectory path, by analyzing the tendency of the BHA to build, hold, or drop the angle of inclination. The other task of this work was to measure the effect of formation strength on wellbore trajectory. In this work finite element model (FEM) results are evaluated and verified using lab data supported with results obtained from some published analytical and numerical solutions and also verified with worldwide utilized software in Oil Industry (Landmark). The FE results significantly match with tubular mechanic lab data. The BHA model permits prediction of wellbore curvature based on both BHA mechanical behavior and geological influences.
Nonlinear Analysis for RC Beams Strengthened by Externally Bonded Steel Plates with Bond-Slip
Authors: Liu T.B. , Zhao Jian Chang , Liu S.W.
Published: January 2015

The RC beams strengthened by externally bonded steel plates are regarded as composite beams which consist of steel plates and reinforced concrete with bond-slip. Based on the deformation compatibility relationship between steel plates and reinforced concrete, the constitutive relationship which can reflect the mechanical properties of steel plates and reinforced concrete and the bond-slip constitutive law, a nonlinear differential equation for the beam, expressed in the form of the tensile force of steel plates, is derived. A nonlinear analytical solution under the double concentrated load of the RC beams strengthened by externally bonded steel plates is obtained. By which a coordination coefficient in the form of the characteristic value of the beam is deduced. By using the coordination coefficient, a practical nonlinear analysis method, which can exactly reflect the bearing capacity and deformation of the beam is established.
Research and Development Display Agent Determination of Nitrite Content in Concrete
Authors: Liang Sen , Hu An Xiang , Liu Jia Xin , Fu Jun Xing , Liu Jun Zhe
Published: January 2015

The invention relates to building materials field, especially the determination method relates to a concrete root ion content of nitrite. Nitrite as antifreeze in the concrete, early strength agent and rust resistance agent composition is widely used in reinforced concrete structure, the admixture of cement quality generally accounted for 1-3% range, its content is too little and too much will affect the durability and workability of concrete, if insufficient dosage when the early strength, anti-freezing and anti-rust effect is not obvious，otherwise affect the workability and durability，when used as a rust inhibitor and dispersant, insufficient dosage, sometimes, can produce local corrosion and accelerate the macro cell corrosion.Therefore, the determination of nitrite ion content in root of concrete (or mortar) has become the inevitable trend of modern concrete production.
Study on the New Waterproof Bonding Material of Bridge Deck Pavement
Authors: Ning Xia Yuan
Published: January 2015

In our country, the waterproof bonding layer destruction is a main reason which lead to bridge deck pavement damage, the effective measure is to solve the weak quality question of bonding material between layers, it is a important quarantee for bridge deck pavement durability. This paper has an in-depth research to pavement performance of synchronization gravel waterproof bond layer, the best dosages of asphalt and gravel have been obtained, and the improving construction method has been put forward. The results shows that the synchronization gravel waterproof bond layer with two apray asphalt and one spread gravel method can solved the weak quality question of interlayer cementing material.
Synthesis and Characterization of Graphene–Cu Nanocomposites by One-Pot Solvothermal Approach
Authors: Ma Qi , Song Jin Ping , Shuang Shao Min , Guo Yong , Dong Chuan
Published: January 2015

GN nanosheets decorated with Cu nanoparticles were synthesized based on one-pot method using PVP as a protective agent, ethylene glycol as a solvent and reducing agent without additional reducing agents.
Simulation of Microstructure and Dynamical Properties in Ni-Al Alloy under Different Pressures
Authors: Liu T.Z. , Cheng Zheng Fu , Xia Ji Hong , Xiao Xu Yang , Huang H. , Long Lin , Yan Yu Chun
Published: January 2015

The connection of atomic clusters has been investigated using molecular-dynamics simulation to explain the splitting of the second peak of the pair-distribution function in amorphous alloys. It is found that the unevenness of the connecting style of atomic clusters results in the splitting of the second peak and the two subpeaks is caused by a three-atom-shared connection and a one-atom-shared connection between atomic clusters. The underlying reason is that metallic glasses have higher density than liquid alloys and a different connecting style of atomic clusters from crystals.
Ethanol Catalytic Oxidation on Yb Promoted Pd/C in Alkaline Medium
Authors: Dai Zhong Xu , Liu Chang , Zhang Xin , Jiang Jun Quan
Published: January 2015

To promote the alcohol catalytic oxidation of Pd/C catalysts, it was implemented that the lanthanide Yb was introduced to the catalyst via the precipitation thermal decomposition and chemical reduction methods. The structure analysis and surface morphology of Pd-Yb/C catalysts were investigated by XRD and SEM. The ethanol electrocatalytic oxidation activity of in alkaline media was studied by cyclic voltammetry. The results show that the performance of ethanol catalytic oxidation on Pd-Yb/C electrode is better than that on the Pd/C electrode. The introduction of Yb can promote Pd/C catalytic oxidation alcohol and its poisoning tolerance ability.