bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Hygrothermal Environment Effect on Compressive Strength of Stiffened Composite Panel
Authors: Chang Fei , Li Shu Lin , Shi Xiao Peng , Yin Jun Jie , Bian Dong Liang
Published: June 2014

Focus on the hygrothermal environment problems of CF3031/CCF300 stiffened composite panel, the stiffened composite panel absorption were studied on in the 85%RH, 70°C hygrothermal environment, the moisture equilibrium content of the composites were calculated. The compressive test were carried on after hygrothermal aging, observed the change of the strain, and draw the conclusion of the flexural load and the breaking load, contrasted with the panel of before hygrothemal aging. The results show that the rate of remained flexural load was about 85% and the rate of remained breaking load was about 75% after hygrothemal aging.
Preliminary Design and Computational Analysis of a C-D Nozzle with By-Pass System
Authors: Nandakumar M. , Dharmasheelan D. , Elavarasan N.
Published: June 2014

The jet propulsion system, either for subsonic or supersonic flow, the nozzle design is a critical area of choice where its overall performance gets an adverse change. In the trending technologies, configuring any nozzle, their challenges associated with the design increases accordingly to the cruise speed of the aircraft. The latter clamshell ejector nozzle design work came up with solution for the most problems but still had its own cons of creating recirculation zone in the inner surface of the clamshells. The former world which are in next stage to design an economically conditioned nozzle system itself invents challenges in area such as jet noise suppression, exit temperature, material selection, variable throat area and exit area. The present work summarized here excelled for the most cons encountered in the latter designs. The experimental investigation and the computational studies resulted that the introduction of C-D nozzle with by-pass system had a great exposure in increasing the Mach while in cruise. The air by-pass system in the exit area supplies the atmospheric air and also acts as a cooling system for the nozzle. It was observed that the temperature curve in the exit area was found low.
Analysis of Shape Memory Alloy Hybrid Composite Plates under Low Velocity Impact
Authors: Chen Yu Liang , Chen Hung Wen , Lin Ying Chih
Published: June 2014

This paper presents the analysis of smart hybrid composite plate with embedded shape memory alloy (SMA) wires subjected to low-velocity impact. The SMA wires were embedded within the layers of the composite laminates and the numerical calculation was used in the impact analyses of the laminated hybrid composite plate. The laminated plate theory, first-order shear deformation theory and minimal potential energy principle was utilized to solve the governing equations of the hybrid composite plate analytically. Energy absorption of hybrid composites can be successfully analyzed using analysis of variance (ANOVA). The results indicated that temperature effect is significant during the transition phase and SMA can effectively improve impact-resistance of the hybrid composite laminated plate. In addition, this hybrid structure is an advanced design concepts that can strengthen the impact resistance capability and enhance the carrying loading efficiency of the structure.
The Application of Nonlinear Dynamics in Hazard Prediction
Authors: Zhang Yan Bo , Li Jian , Liu Xiang Xin , Tian Bao Zhu
Published: June 2014

Disaster system of mine is a complex evolutionary process, and the nonlinear dynamics provides a good train of thought to solve such problems. Based on the introduction of nonlinear dynamics theory, this paper emphatically discusses the application of the theory in the geotechnical hazard prediction of mine. Finally it points out the problems existing in the study of nonlinear dynamics and the direction of the efforts.
An Ensemble Approach of Machine Learning in Evaluation of Mechanical Property of the Rapid Prototyping Fabricated Prototype
Authors: Garg Akhil , Tai K.
Published: June 2014

Rapid prototyping (RP) is a promising product development technology due to its unique characteristic of fabricating functional products timely and efficiently. Fused deposition modelling (FDM) process based on RP technology is used in industries for prototype fabrication and its properties testing. The properties of the RP fabricated prototypes such as wear strength, tensile strength, dimensional accuracy, etc. depends on the parameter settings of the RP machines. For selecting the appropriate parameter settings, various mathematical models developed based on physics and data can be formulated. In the present work, we introduced an ensemble method of genetic programming (GP) and artificial neural network for formulating a model for predicting the wear strength of the FDM fabricated prototype. The results indicate that ensemble model have performed better than that of the standardised GP, which may be then used by experts for optimising the performance of the FDM process.
The Design and Implementation of Matlab Simulation in Optical Aberration
Authors: Lao Zhen Hua
Published: June 2014

In the teaching of optical courses, the aberration knowledge is abstract and students often feel it difficult to understand. According to this phenomenon, a new simulation algorithm, which is based on the analysis of chromatic and spherical aberration theory, is described in this paper; with Matlab as the programming language, the emulation programs of chromatic and spherical aberration are designed and the simulation figures are presented, from which the effect of parametric variation on aberration can be shown vividly and intuitively. And for students, this will be helpful in the mastery of aberration knowledge.
A New Kind of Texture Synthesis Method Based on Best Match
Authors: Xie Yuan Mang , Pan Zhao Hua , Zhang De Gan , Peng Hong Tao
Published: June 2014

In order to improve above problems, this paper presents a new patch-based sampling algorithm for synthesizing textures from an input sample texture. We determine the size of block analyzing the effect of the best matched texture to synthesis result, and the result is satisfying. Moreover, the patch-based sampling algorithm remains effective when pixel-based non-parametric sampling algorithms fail to produce good results.
Tidal Current Turbine and Related Development Problems for Indonesia
Authors: Darmawi Ir.
Published: June 2014

Tidal Current Turbine will be an important device of renewable energy in the upcoming decades. Hydro energy, wind energy and solar energy will mostly utilized in Indonesia in order to fulfill the energy of remote villages and remote islands and optimizing the domestic energy availability. Regarding the small scale field research conducted in the year 2012 and 2013 in Indonesia, transmission system and low rpm alternator are encountered as a significant problems in order to develop the hydro and wind turbine engine. Both parts are not yet produced locally in Indonesia. Domestic production in step-up gear transmission system of ratio 1 : 30 to 1 : 60 and low rpm alternator will fundamentally required to gain creativity in the country.
Electricity Generation with Camphor as Fuel
Authors: Santhosh G. , Palaniappan P.R. , Krishnan N. Santhana , Kumar R. Dilip , Muruganandam D.
Published: June 2014

This paper deals with the economic and efficient way to generate electicity. Many may think this method will not be feasible. But once this is executed electricity will be generated very easily. When comparing with other fuels the quantity required may be high but it is ecofriendly and economic. Moreover camphor is bio degradable and can be prepared artificially in lab also.
SUPEL Scenario for PWR Spent Fuel Direct Recycling Scheme
Authors: Waris Abdul , Pramuditya Syeilendra , Aji Indarta Kuncoro , Wirawan Rahadi , Nuha
Published: June 2014

Study on SUPEL (Straight Utilization of sPEnt LWR fuel in LWR system) scenario for PWR spent fuel direct recycling scheme has been performed. Several spent PWR fuel compositions in loaded fuel has been investigated to achive the criticality of reactor. The reactor can obtain it criticality for 4.5 a% of UO2 enrichment with at maximum 8.0 a% of spent fuel fraction in loaded fuel. The neutron spectra become harder with the raising of UO2 enrichment in the loaded fresh fuel as well as the increasing of the fraction of spent fuel in the core.
Electrical and Structural Properties of P-Type Monocrystalline Silicon Solar Cell with Phosphorus Screen-Printed N+ Emitter
Authors: Choi Chel Jong , Janardhan V.
Published: June 2014

We have fabricated p-type monocrystalline silicon (Si) solar cell with phosphorus (P) screen-printed n+ emitter and investigated its electrical and structural properties. During P screen-printed n+ emitter process, a 16 nm-thick phosphosilicate glass (PSG) layer was formed as a result of interaction between P-dopant paste and Si substrate. Due to the PSG reflow associated with the reduction of viscosity of oxide caused by the amount of P atoms in PSG layer, thinner and thicker PSG film was formed in convex and concave regions of the textured Si surface, respectively, which was quite different from the growth behavior of thermally grown SiO2 layer. Due to a strong dependence of P diffusion on the Si interstitials, deeper and shallower junctions were abnormally formed near the convex and concave regions in the textured Si surface, respectively. The electric field and temperature dependence of the current-voltage characteristics demonstrated that the Poole-Frenkel barrier lowering mechanism along with the generation-recombination mechanism had dominance over the current conduction in the reverse bias region of p-type monocrystalline Si solar cell fabricated using screen printing process.
Design and Failure Analysis of Track Tensioner Unit for Mobile Robot Using Solidworks
Authors: Hasnan Khalid , Bakhsh Qadir , Aisham Badrul , Ahmed Aftab
Published: June 2014

The designer should be familiar with the acceptable dimensions and material for model, which fulfils its performance requirements under stress and deformation. In this paper the design and failure analysis of track tensioner unit (TTU) of hybrid locomotion mobile robot is presented. The TTU is a module that helps the locomotion system transformability while robot moves on wheel or track mechanism. It is made of Aluminium alloy Al6061-T6 and was analyzed for its mechanical behaviour that subjected under different load conditions. The failure analysis gave the results about the material behaviour under loading condition that helps the selection of suitable one for design. The simulation result shows that the model material fails or deform permanently under 1000N load.
Exploitation and Verification of the Engine Controller Virtual Test System
Authors: Wan Ji Kui , Zhou Bing , Liu Zhi Yuan , Yang Jing
Published: June 2014

Considering the limitation of the existing method of engine controller’s development, a method to establish a virtual test system of engine controller was proposed. Firstly, a virtual engine controller was developed in ETAS INTECRIO environment and a vehicle system was developed in Matlab/Simulink environment, they composed a closed loop system. Then the system was validated by compared the simulation results of the virtual test system with the vehicle test results and the hardware-in-the-loop simulation results. The comparison results show that the system established by this method could satisfy the test requirement in the early controller development stage. This system has the advantage of higher convenience and lower cost and can significantly improve the efficiency of the engine controller development.
Combined CNF with LQR in Improving Ride and Handling for Ground Vehicle
Authors: Zulkarnain Noraishikin , Zamzuri Hairi , Mazlan Saiful Amri
Published: June 2014

This paper presents and analyses a performance comparison between a Linear Quadratic Regulator (LQR) and Composite Nonlinear Feedback (CNF) controllers for an active anti-roll bar (ARB) system. The anti-roll bar system has to balance the trade-off involving ride comfort and handling performance. The basic vehicle dynamic modelling with four degree of freedom (DOF) on half car model is proposed. The design model is validity and the performances of roll angle and roll rate under control of LQR and CNF controller are achieved by using simulation analysis. Both two controllers are modeled in MATLAB/SIMULINK environment. It has to be determined which control strategy delivers better performance with respect to roll angle and the roll rate of half vehicle body to achieve this goal. The result shows, the CNF LQR fusion control strategy improve the performance compared to LQR and CNF control strategy.
Research of Automobile Driving Simulator Control System
Authors: Zhang Shi Jun , Xu Zi Yang
Published: June 2014

This paper introduce a control system of automobile driving simulator, Using the CPLD (Complex Programmable Logic Device) technology can easily achieve detect the states of ignition equipment, steering equipment, clutch equipment, foot-brake equipment, hand-brake equipment, accelerator equipment, shift equipment etc and drive the instrumentation.
Numerical Simulation of Hydraulic Jump Using the Improved Space-Time Conservation Element and Solution Element Method
Authors: Toh Hoong Thiam
Published: June 2014

This paper illustrates how Space-time Conservation Element and Solution Element (CE/SE) method which is developed for compressible flow can be used to solve the Saint-Venant equations numerically. The sharp shock-capturing capability of the scheme is demonstrated through the simulation of hydraulic jump phenomenon in prismatic open-channels. Two channel cross-section geometries are considered, viz rectangular and triangular cross sections. The code developed for the present study is validated by solving the benchmark problem of dam-break flow. The numerical solution of the Saint-Venant equations for the rectangular channel is found to be in good agreement with the experimental data available in the literature. The effect of channel wall slope on hydraulic jump in triangular channel is also discussed in this paper.
Intelligent Detection System of Illegal Appliances’ Malignant Load of Campus Electrical Grid
Authors: Li Qiang , Yang Kui , Wu Tian Ji
Published: June 2014

With the appliances increasing on campus, illegal appliances caused a great security risk to the campus grid security. For malignant load of illegal appliances, we design intelligent detection system of load to solve the problem. First, this paper analyzes the forecasting method for campus electricity load, and does statistical analysis of the amount of college electricity load for 24 hours; followed by the overall design of intelligent detection system of malignant load, describing its features and performance indicators; finally, the system’s part implementation and source code. This
Integrating AHP Application for Project Management
Authors: Alzober Waled , Yaakub Abdul Razak
Published: June 2014

Project management considers theme as the most vibrant and dynamic multi-disciplinary. Project management includes situations of decision making that are complex, thus the discerning methods to make a sound decisions are required. AHP has been used as a managerial decision tool in many industries. For most cases in project management, AHP has been used as a standalone methodology. In an attempt to extend the use of integrated AHP applications to areas that regarding to project management issues, this paper aims to introduce the integrated AHP application for dealing with project management issues. Combined AHP with some meta-heuristics approaches will be suitable to solve the problem related of the project management.
Product Life Cycle: VAVE Impact in Manufacturing Cost Reduction
Authors: Mekid Samir
Published: June 2014

This paper reports on the impact of Value Analysis Value Engineering (VAVE) applied to an industrial product where manufacturability and choice of manufacturing methods can be of great benefit in reducing cost and sometimes manufacturing time in a mass production line. The purpose of this requested task is to reduce the cost of a specific product using VAVE analysis through better value estimation related to suitable manufacturing process while maintaining similar or better technical performance. A couple of technical design solutions are proposed and discussed with study cases. The work is progressing towards the final stage.
A Hybrid Discrete Firefly Algorithm for Multi-Objective Flexible Job Shop Scheduling Problems with Maintenance Activity
Authors: Karthikeyan S. , Asokan P. , Chandrasekaran M.
Published: June 2014

This paper presents a novel hybrid discrete firefly algorithm (HDFA) for solving the multi-objective flexible job shop scheduling problem with non fixed availability constraints (FJSP-nfa) due to maintenance activity. Three minimization objectives-the maximum completion time, the workload of the critical machine and the total workload of all machines are considered simultaneously. In this study, the discrete firefly algorithm is adopted to solve the problem, in which the machine assignment and operation sequence are processed by constructing a suitable conversion of the continuous functions as attractiveness, distance and movement, into new discrete functions. In addition the decoding mechanism considering the maintenance activity is presented. A neighbourhood based local search is hybridized to enhance the exploitation capability. Representative benchmark problems are solved in order to evaluate and study the performance of the proposed algorithm.
Equipment Aging, Aging Detection, and Aging Management: A Review
Authors: Hui K.H. , Hee Lim Meng , Leong M. Salman
Published: June 2014

It is becoming increasingly difficult to ignore the importance of equipment aging in critical industries such as power generation plants, oil and gas plants, etc. since many system components are approaching the end of their designed operational lifetime. New installations of system components in these critical industries will be extremely costly whilst any increase in demand will be too small to warrant totally new facilities. Aging management can be an alternative for this aging equipment to ensure its safety and reliability. This review aims to provide a brief understanding of equipment aging, aging detection and recent research into aging management.
Research and Implementation of Electric Power Market Analysis and Forecast System
Authors: Jiang Chun Min
Published: June 2014

In order to meet the requirements of the market economy, the power company needs to make power market analysis and forecast, it is the basic work of guarantee of the investment returns and improves operational efficiency, and it also is the basic work of network operations, planning, marketing, and the financial budget for the foundation. The accuracy of electricity demand forecast will not only affect the safe and reliable of power network, but also to network operators on the production and operational decision making and operational efficiency. To meet the power network’s commercial operation, and for the requirements of network’s modernization and scientific management; In order to predict the market’s electricity demand accurately, reduce the load forecast engineers’ frequently and complicated data processing work, also to ensure that the derive of historical data and ensure information sharing. Development of the electricity market-oriented environment for the network's power market analysis and forecast system is very necessary.
Electrolytic Simulation Experiment of Multilateral Horizontal well
Authors: Huang Yi , Liao Rui Quan , Luo Wei , Xie Xiang Wei
Published: June 2014

According to the water and electricity resembling principle, an electrolytic simulation experiment was designed for multilateral horizontal well. The accuracy of algorithms raised by Табаков, Linsong Cheng, Tingxue Jiang was discussed quantificationally. Having analyzed how branch length, number of braches, wellbore diameter affects the productivity respectively. It’s concluded that algorithm of Linsong Cheng is most precise and when branch length is below 70m, Табаков’s formula is as well as accurate. In addition, branch length influents production most significantly, and then the number of branches.
Differences in the Design of Underfloor Air Cavities
Authors: Renčko Tomáš , Sedláková Anna
Published: June 2014

Concepts of remedial treatments of historic buildings using ventilated floors, with a few exceptions, are with considerable popularity preferred by the representatives of monument protection. The fact that they require small interventions in the masonry is of great benefit for compliance with the methodology of cultural heritage protection, as is the fact that such interventions do not compromise the structural analysis of buildings. The materials used can be original (as is often remitted by the representatives of the monument protection), but for this purpose (covered parts) it is also possible to use modern materials or modern constructions. Currently, in our country with great popularity, special shaped units began to be used. When these methods should be given particular attention to the amount of air cavities design and deployment of the inlet and outlet openings, which is obviously problematic. In this article two different underfloor ventilation systems are compared using CFD simulation. To verify of accuracy of used simulations was carried out laboratory-experimental model.
Dynamic Analysis of Liquid Storage Cylindrical Tanks due to Earthquake
Authors: Kotrasova Kamila , Grajciar Ivan
Published: June 2014

Ground-supported tanks are used to store a variety of liquids. This paper provides theoretical background of seismic design of liquid storage ground-supported circular tanks. During earthquake activity the liquid exerts impulsive and convective (sloshing) actions on the walls and bottom of the circular tank. Seismic response was calculated by using the seismic response spectrum. Knowledge of these inner forces is important for design of reservoirs.
Effect of Cement Replacement by Zeolite on the Basic Mechanical Fracture Properties of Concrete: A Parametric Study
Authors: Rovnaníková Pavla , Schmid Pavel , Keršner Zbyněk
Published: June 2014

This paper introduces the results of fracture experiments on concrete specimens of different composition modified by zeolite (7.5 to 30 % by weight of cement dosage). It presents the determination and comparison of basic mechanical/fracture parameter values such as volume density, compressive strength, elasticity modulus, effective fracture toughness and fracture energy.
Frequency of the Analysis Response of Reinforced Concrete Structure Subjected to Road and Rail Transport Effects
Authors: Demjan Ivo , Tomko Michal
Published: June 2014

A 3D model of a reinforced concrete building was created using a dynamic analysis which focused on the spectral response of the object represented by a random excitation experiment found in records in the form of load spectra.
Generalized and Simplified Linear Closed-Form Solution of an Active Tensegrity Unit in the Form of Octahedral Cell
Authors: Kmeť Stanislav , Platko Peter
Published: June 2014

Results of the generalized and simplified linear closed form solution of an active or adaptive tensegrity unit, as well as its numerical analysis using finite element method are presented in the paper. The shape of the unit is an octahedral cell with a square base and it is formed by thirteen members (four bottom and four top cables, four edge struts and one central strut). The central strut is designed as an actuator that allows for an adjustment of the shape of the unit which leads to changes of tensile forces in the cables. Due to the diagonal symmetry of the 3D tensegrity unit the closed-form analysis is based on the 2D solution of the equivalent planar biconvex cable system with one central strut under a vertical point load.
Investigation of Selected Physical Parameters of Cementitious Composite during Sequential Fracture Test
Authors: Konečný Petr , Veselý Václav , Lehner Petr , Pieszka Daniel , Žídek Libor
Published: June 2014

The paper is focusing on the investigation of the effective crack length obtained from bending test on concrete notched beams with the complementary measurements of ultrasound passing time through the tested concrete specimen. The ultrasound passing time measurements are performed on several stages of the fracture process along the specimen ligament for each tested notched beam. Gained results of the time of ultrasound pulse needed to pass through specimens' failure zone, i.e. its dependence on the crack length or opening, provide information which may help to identify the process of crack formation without the visible indications. The fracture tests are conducted for a set of specimens differing in the notch length. Changes of the ultrasound passing times with increasing effective crack length are observed and discussed.
Load Capacity of an Internal Slab-Column Connection depending on the Geometric Parameters of the Reinforcement
Authors: Wieczorek Barbara
Published: June 2014

Literature deals with a score of catastrophes of slab-column structures, where the absence of adequately constructed reinforcement resulted in an absolute destruction of the construction. This problem is not dealt with either in the Polish Standards, nor in the Eurocodes. Some suggestions concerning the prevention of such situations are to be found merely in CSA A23.3-04. Instructions concerning such a structure are also contained in ACI 318. The paper presents the results of laboratory tests performed on a simplified model of a slab-column connection. The aim of investigations was to find out at which value of the load the destruction of such a connection occurs due to a rupture of the bars above the column. In respective models the reinforcement passing above the column consisted of bars with a diameter of ø8 mm, ø12 mm or ø16 mm. The obtained results of laboratory tests and calculations permitted to determine the relations between the exerted load and the displacement of the column in time and also to determine the values of the force at which the rupture of the bars above the column had taken place.
Modelling and Statistical Approaches to Lateral-Torsional Buckling
Authors: Kala Zdenek , Valeš Jan
Published: June 2014

Some particular and selected problems aimed at ultimate limit state and probability-based studies pertaining to lateral-torsional buckling of steel beams are described. Stochastic analysis of the ultimate limit state of a slender member IPE220 under bending was elaborated. The values of non-dimensional slenderness for which the statistical characteristics of random load-carrying capacity are maximal were determined. The stochastic computational model was created in the programme ANSYS. Geometric nonlinear solution was employed. In the conclusion of the article, the question of the random effect of the initial rotation of the cross-section on the load-carrying capacity is discussed.
ProbCalc - An Efficient Tool for Probabilistic Calculations
Authors: Krejsa Martin , Janas Petr , Krejsa Vlastimil
Published: June 2014

The probabilistic methods are used in engineering tasks where a computational model contains random variables. The new method the Direct Optimised Probabilistic Calculation (DOProC) - which is being developed now seems to be highly efficient in terms of calculation time and accuracy of solution. The computation is purely numerical and does not use any simulation techniques. The algorithm has been implemented in several software applications which have been used in probabilistic tasks and probabilistic reliability assessments.
Sloshing of Liquid in Rectangular Tank
Authors: Kotrasova Kamila
Published: June 2014

Ground-supported tanks are used to store a variety of liquids. During earthquake activity the liquid exerts impulsive and convective pressures (sloshing) on the walls and bottom of the rectangular tank. This paper provides theoretical background for analytical calculating of circular frequencies and hydrodynamic pressures developed during an earthquake in rectangular container. Analytical results of first natural frequency are compared with experiment.
Comparison Experimental Tests of Behavior of the Slab-Column Structure after Removal of the Corner Support with Simplified Models Describing the Mechanism of Destruction
Authors: Wieczorek Mirosław
Published: June 2014

The paper deals with the boundary state of the load-bearing capacity of a fragment of a slab-column structure in an emergency situation caused by the removal of a support at its corner. The paper presents the results of tests concerting the investigated element with the dimensions of 4000×4000×100 mm. Next, theoretically suggested mechanisms of the corner support have been dealt with, describing the behaviour of a slab-column structure after the removal of the support at the corner. The aim of the paper was to compare the results of test carried out in the laboratory with the values obtained by analytical calculations. The results of this analysis have been gathered in the summary.
Important Problem Analysis and Solution of Whole Bridge Type Switching Power Supply
Authors: Lu Xian Yang , Ji Min
Published: June 2014

With the rapid development of electronic technology, there is a new content of requirements of electronic instrument and equipment, performance is required for more safety and reliable, function are being asked to more powerful, usage is required higher integration degree. The whole bridge type of switch power supply (WBTSPS) is introduced in this article , combined with the specific application in practice, secondary breakdown problems of power switch tube are analyzed, the output of the rectifier and filter circuit are illustrated, the electromagnetic radiation source (EMI) suppression method are pointed out in switching power supply, PLC wiring problems are solved, for improve the service life of WBTSPS, improve the production efficiency, it has an important guiding significance.
Incorporation of MWCNTs to PMMA Bone Cements: Effects on Fatigue Properties
Authors: Lin Yan , Xu Yong Zhi
Published: June 2014

All the commercially available plain acrylic bone cement brands, which are used incemented arthroplasties, are based on poly (methyl methacrylate). With a few exceptions, have the same constituents. It is well known that these brands are beset with many drawbacks, such as high maximum exotherm temperature, lack of bioactivity, and volumetric shrinkage upon curing. The aim of this study was to investigate the fatigue properties of MWCNTs-PMMA bone cement composites. Multi-walled carbon nanotubes (unfunctionalised and carboxyl functionalised), which was synthesized by infusion chemical vapor deposition, and PMMA bone cement were used to produce pastes. The mixing amount of MWCNTs ranged from 0.1 wt.% to 1wt.%. The fatigue properties of the MWCNTs-PMMA bone cement was characterised with the type and wt.% loading of MWCNTs used having a significant influence on the number of cycles to failure. The condition and degree of dispersion of the MWCNTs in the matrix at different length scales were studied using field emission scanning electron microscopy. Improvements of the fatigue properties were attributed to the MWCNTs arresting or retarding crack propagation through the cement by a bridging effect and hindering crack propagation. MWCNTs agglomerates were evident in the cement microstructure and the degree of agglomeration depended on the level of the mixing amount and the ability of the MWCNTs.
A Design of the Intelligent Fire Alarm System Based on CAN Bus
Authors: Wang Hui Jun , Zhang Tao
Published: June 2014

In order to solve the existing automatic fire alarm system shortcomings, such as high rate of false positives and poor reliability, this paper introduces an intelligent fire alarm system in the composition of MCU based on the CAN bus technology. The system, with the control core of STM32F103, uses multiple sensor information fusion technology to realize the fire warning, and adopts the advanced CAN bus technology to realize efficient, reliable and economic connections between the sensor and the fire linkage. Practice shows that the system is of high real-time, accuracy, and can meet the requirements of fire control in buildings.
A New Estimation Method of Transient Voltage Stability Limit Clearing Time
Authors: Xing Da Peng , Li Jia , Qiu Da Qiang
Published: June 2014

Critical clearing time index is one of the indices to assess transient voltage stability. At present it is mainly calculated based on the instantaneous value after transient voltage instability or the steady state valueafer fault clearing time. So a new method to estimate the critical clearing time is presented which is correspongding to the induction motor minimum slipvalue in the fault. It can forecasttransient voltage instability,and has higher precision comparing whithquik criterion and analytical method. The simulation results of IEEE 30-bus system verify the effectiveness of the stated method.
.CLC number: TM 73 Document code: A Article ID: 000-3673(2013)00-0000-00
An Wireless Collection and Monitoring System Design Based on Arduino
Authors: Yu Quan Sheng , Duan Mei Ying , Zhang Tian Shun , Wu Hong Gang , Lu Shao Kun
Published: June 2014

Considering the current situation that the temperature control systems in market have the general disadvantages of complicated structure, high power consumption and tremendous cost, a new greenhouse temperature supervising system is designed, with a Arduino Mega 2560 single chip microcomputer as the core, XBEE as the short distance wireless transferring tools, and with function of displaying information in computers and remote control. The core component of this system is the Arduino software-hardware open source platform, which is currently popular in the market. This platform embraces the excellence of stability, low power consumption, cheap cost and easy operation as its advantages and selling points. XBEE can constitute the mesh network, each module of which can supplied as the route node, coordinator and terminal node. This system can achieve the functions of collecting data from sensors while is capable of displaying these data in the computers and put them under the network remote control. Easy to install, it can simultaneously achieve network monitoring several greenhouses. Enormous convenience to production inside the greenhouse is fulfilled due to these mentioned features as well, which makes it suitable to the small scale agricultural production.
Lubricating Online Detecting System of Large Unit Based on the Virtual Instrument
Authors: Ma Yuan Jia , Ning Sheng Cai , He Jia Yong
Published: June 2014

Aiming the lubricating oil quality can cause the machine failure and decrease operating time, its impurities can also change the oil capacitance, the online detecting system which based on the LabVIEW virtual programming language is designed. LabVIEW can make data collection, processing, display, memory, etc, implementing the online monitoring of the lubricating oil. This design greatly decrease the workload of the staff, reduce the detecting time, raise the testing efficiency of the equipment and measure the various impurity content of lubricating oil more accuracy.
Computer Simulation for Thermal Analysis of an Electric Box
Authors: Chen Bo , Li Ning
Published: June 2014

Computer modeling and simulation of thermal analysis of a satellite borne electric box is introduced in this paper. Simplified geometry was built and meshed to get a finite element model. Then the environmental conditions were defined, the work case was analyzed, and the influence of the parameter of a thermal contact resistance was discussed.
Convolution Approximating Perfect Matched Layer Absorbing Boundary Condition of 3D Scalar Acoustic Wave Equation
Authors: Wang Cong , Zhang Jian Xun
Published: June 2014

Because traditional displacement form of 3D acoustic perfectly matched layer (PML) absorbing condition needs to split the displacement into three parts, which requires solving a third-order differential equation in time and occupies a large amount of memory. In order to solve the above problems, this paper puts forward an Convolution approximating PML absorbing boundary condition based on the previous works, and discusses the basic construction of the traditional perfectly matched layer absorbing boundary condition and the new arithmetic in detail, then the new method is compared with absorbing condition of low order paraxial approximation and traditional PML, investigating the absorbing effects of 3D acoustic wave’s numerical records.
Research on Saturation Switched Control of Three-Phase Active Power Filter Based on State Feedback Model the Content
Authors: Zhang Yun , Sheng Jian Xin , Zhang Jin Feng , Jin Xue Na
Published: June 2014

The main difficulties in controlling Three-phase active power filter (APF) arise from their hybrid nature, and the saturation of nonlinear constraints. A novel approach to the modeling and regulation problem of APF is presented from the combined perspective of switched system and stability of systems with saturation constraints. Firstly, the three-phase APF is built as switched affine system model. Based on the sufficient condition for quadratic stability of convex combination, the common Lyapunov function was selected. Meanwhile, the switched rules are put forward by this function. The paper also discusses the problem of feedback control for the switched systems with saturated nonlinear constraint; and gives a stability condition for switched system under state saturation. Finally, simulation results have good agreement with the theory analysis, and demonstrate the validity of this approach.
Design and Application of Internal Flat-Pool Measuring Weir
Authors: Ying Qiang
Published: June 2014

Base on the mechanism of surge tank and measuring weir, an internal flat-pool measuring weir has been developed which can be applied in flow rate measuring area such as the hydraulics labs, the hydraulic engineering model labs and the river regulation project model labs. This new device functions well even with site limitation and unstable current. This passage introduces the mechanism of measuring weir with a few examples.
Optical and Electrical Properties of P-Type ZnO Thin Film Post-Treated by Plasma-Enhanced Chemical Vapor Deposition
Authors: Cao Ping , Bai Yue , Qu Zhi
Published: June 2014

In this paper, the high quality p-type nitrogen-doped ZnO film was prepared by use of post-treated by plasma-enhanced chemical vapor deposition. The p-type ZnO with the hole density of 2.2×1016was obtained. The converting from n-type to p-type was observed, which was obvious on the analysis of the optical and electrical properties of the p-type ZnO. Nitrogen was incorporated into ZnO film during the treatment process to occupy the oxygen positions, and also partly compensated some donor defects. When the amount of activated nitrogen exceeded those donor states to realize an effective compensation, the transformation from n-type to p-type happened.
Study on the Thermal Stress Couple Field of Nuclear Power Pump Mechanical Seal Based on ADINA
Authors: Zhang Hai Yang , Zhu Wei Bing , Zhou Gang , Hao Xu
Published: June 2014

In this paper, a two-dimensional axisymmetric thermal stress coupling model of mechanical seal’s rotator and stator components was established by ADINA, simplification and appropriate boundary constrained condition of stator and rotator was obtained by analyzing the contact state among the seal rings. It’s shown that the contact surface is equivalent to a resource of constant thermal, temperature of contact surface rises step by step and the location of the maximum temperature getting close to the midpoint within the contact surface according to the sliding time, the temperature gradient decrease along the worksheet so that the temperature decrease accordingly in a parabolic isogram.
Design and Simulation of Dot Distribution of the Non-Uniform LED LGP
Authors: Yang Yu Zhou , Yang Bin , Jiang Shan , Wang Wei , Chen Fan Sheng
Published: June 2014

In order to design a product that can be used for lighting and partition, a calculating method of the net dot distribution is advanced according to the distribution curve flux of LED that is designed, and LGP that possesses four regions that can light equably is finally designed. The irradiance of the surface of this LGP is analyzed through software simulation. The illuminance of each is 5405lux, 5318lux, 4360lux, and 4609lux, and the uniformity for each is 96.7%, 82.3%, 91.3% and 8.25%.
The Research of EPON Rapid Protection Switching in Power System
Authors: Yu Peng Fei , Yu Qiang , Chen Wei , Ren Jie
Published: June 2014

The redundant optical link protection is the most popular technology by which we advance the reliability of Ethernet Passive Optical Networking (EPON) in power communication network, and self-healing sooner the network better. Through optical link state monitoring technology, we can start the protection switching immediately. Through optical network unit(ONU) pre-registration technology, we can shorten the self-healing time. Moreover, everything is occur on ONU, and then it would simplify the process.
Optimal Design of LQR Controller Based on Improved Artificial Bee Colony Optimization Algorithm
Authors: Yang Huai De
Published: June 2014

The inverted pendulum system is characterized as a typical nonlinear, fast multi-variable, essentially unstable system. It is difficult to control because of its instability .In order to improve balance control, the mathematical model of the single inverted pendulum is established, a LQR controller is designed which is based on improved artificial bee colony. Experiments show that the improved algorithm has better performance than standard artificial bee colony algorithm on convergence and rate balance control to meet the requirements of the single inverted pendulum.
The Bearing Vibration Signal Collecting System Based on STM32F103C8T6
Authors: Yuan Zhong Hu , Xu Man Yang , Qi Xiao Xuan
Published: June 2014

Vibration signal collecting is an important step in rolling bearing fault diagnosis process. The collected signal can exhibit effectiveness of the fault depend on the signal collecting system. Combine the attribute of the rolling bearing, a new signal collecting system base on the STM32F103C8T6 is designed in this paper. The new system is made of supply circuit, signal conditioning circuit, AD conversion circuit and communication module.
The Study of the Lock Hopper Control System
Authors: Zhang Dan Ping
Published: June 2014

This thesis is the introduction of a certain Petro-chemical factory about the locked block hopper control system of reforming equipment. The equipment is controlled by the American TRICON control system completes together by American Honneywell DCS. installment's hard core - The catalyst regeneration unit and the unit interconnection part's control is completes in the TRICON control system, the data passes to the DCS control system through the serial port, the operators can monitor the situation. This design concept is applicable in the complex programmed control and operation in refinery.
Design and Implementation of Car’s Virtual Exhibition and Individual Customization System Based on Virtools
Authors: Meng Xiang Bin , Sun Su Rong , Wang Yan Min , Chen Sheng Peng
Published: June 2014

A interactive and virtual platform of car’s exhibition ,which meets the future consumer’s individual demands and promotes user experience in the environment of electronic commerce,is proposed.And we continuously expand our work based that had finished,propose a platform framework of car’s virtual exhibition and individual customization system based on Internet.
Application of Business Management Computer Information Technology
Authors: Wu Rui
Published: June 2014

With the development and progress of science and technology , computer and network technology has been rapid development of computer Its powerful function gradually penetrated into all areas of society , which greatly promoted the modernization of social management . Enterprise development ushered in unprecedented opportunities and challenges , but also need to develop and manage the use of complex information system construction , so that not only can enhance their ability to strain the market, but also help companies achieve product development, production, supply and marketing , inventory, human resources and full optimization of management , greatly promoted the business management modernization.
Recent Advances in the Study of Film Cooling on the Gas Turbine Blade
Authors: Dai Ping , Li Shuang Xiu
Published: June 2014

The development of a new generation of high performance gas turbine engines requires gas turbines to be operated at very high inlet temperatures, which are much higher than the allowable metal temperatures. Consequently, this necessitates the need for advanced cooling techniques. Among the numerous cooling technologies, the film cooling technology has superior advantages and relatively favorable application prospect. The recent research progress of film cooling techniques for gas turbine blade is reviewed and basic principle of film cooling is also illustrated. Progress on rotor blade and stationary blade of film cooling are introduced. Film cooling development of leading-edge was also generalized. Effect of various factor on cooling effectiveness and effect of the shape of the injection holes on plate film cooling are discussed. In addition, with respect to progress of discharge coefficient is presented. In the last, the future development trend and future investigation direction of film cooling are prospected.
A Distributed Association Rules Mining Algorithm
Authors: Cao Wen Liang , Chen Li Ping
Published: June 2014

Data mining has attracted a great deal of attention in the information industry in recent years and can be used for applications rangning from business management, production control, and science exploration etc. Most of the existing data mining algorithms are processing in the centralized systems; however, at present large database is usually distributed. Compared with the frequent itemsets lost and high communication traffic in distributed database conventional and improved algorithm FDM, An improved distributed data mining algorithm LTDM based on association roles is proposed. LTDM algorithm introduces the mapping indicated array mechanism to keep the integrity of frequent itemsets and decrease the communication traffic. The experimental results prove the efficiency of the proposed algorithm. The algorithm can be applied to information retrieval and so on in the digital library.
A New Feature Detection Algorithm Based on RANSAC
Authors: Huang Yuan Jiang , Huang Jie
Published: June 2014

A improved RANSAC algorithm was introduced into the segmentation of LiDAR and r-radius point density was put forward to the estimation criterion,which aims to remove the discrete point outside the feature plane.an accurate registration is achieved by improving RANSAC algorithim after an analysis on the advantages and disadvantages of the algorithm for objects with many planar feature.The algorithm are implemented with VC++ and VTK platform,tested by real data collected on the test area,it verify the effectiveness and accuracy of the proposed algorithms.
Research on the AC-13 Skeleton Dense-Graded Asphalt Mixtures by Fractal Theory
Authors: Hu Gui Hua , Chen Xiao Wei , Wang Xuan Cang
Published: June 2014

This paper study on AC-13 skeleton dense-graded asphalt mixtures by fractal theory, obtaining that both aggregate size and gradation have fractal character. Compared three kinds of asphalt mixture, we found that there was a strong correlation between fractal dimension of aggregate and aggregate size distribution. AC-13 skeleton dense-graded asphalt mixtures were tested. The results show that the aggregate fractal dimension has a good correlation with mixture’s bulk density, mineral aggregate gap rate, percentage of voids and asphalt degree of saturation too. The study is useful for reference to the readers who engage in further study of the fractal theory’s application to asphalt mixtures.