bluuebunny/crossref_metadata_2025 huggingface dataset:
Linear Block Codes for Six-Dimensional Signals over Finite Fields
Authors: Dong Xue Dong
Published: August 2013

t is known that the performance of a signal constellation used to transmit digital information over the additive white Gaussian noise channel can be improved by increasing the dimensionality of the signal set used for transmission. This paper derives an algorithm for constructing codes for six-dimensional signals over finite fields of the algebraic integer ring of the cyclotomic field modulo irreducible elements with the norm , where is a prime number and or .These linear codes can correct some types of errors and provide an algebraic approach in an area which is currently mainly dominated by nonalgebraic convolutional codes.
Multi-Unknown Breaks Estimates in Presence of Fractional White Noise Disturbance
Authors: Lu Deng
Published: August 2013

This paper analyzes the distribution of breaks estimators and finite sample property of the method based on different mean break and long memory situations based on Bai and Perron (1998) multi-unknown breaks method. As to the distribution of the multiple break estimates, the property of the estimates under the alternative hypothesis is better when d is close to-0.5 that the bias and variance are smaller and the distribution are smoother even better than the BP (1998) case. Further work can be made on the limit distribution of break number test statistics in the case of d (-0.5, 0), d (0, 0.5) and to the case of three and more mean, trend breaks.
An Improved Tracking Algorithm Combing Color and LBP Texture Features Based on Particle Filter
Authors: Dong En Zeng , Su Li Ya , Fu Yan Hong
Published: August 2013

In this paper, an tracking algorithm combing color and LBP texture features based on particle filter is proposed to overcome the disadvantages of existing particle filter object tracking methods. A color histogram and a texture histogram were combined to build the objects reference model, effectively improving the accuracy of object tracking. Experimental results demonstrate that, compared with the method based on single feature, the proposed method is highly effective, valid and is practicable.
Cognitive Impulse Ultra Wide Band Spectrum Sharing Radio and Pulse Shaping
Authors: Zhang Feng Shan , Liang Cai Feng
Published: August 2013

Both underlay spectrum sharing radios and overlay spectrum sharing radios have their advantages and disadvantages. Ultra wide band (UWB) and cognitive radio (CR) are important underlay and overlay technology respectively used as secondary radio systems. In this paper, a cognitive impulse ultra wide band (CIUWB) spectrum sharing radio technology is presented based on impulse UWB and CR.
A New Channel Conflict Model for Multi-Radio Multi-Channel Wireless Networks
Authors: Zhu Shi Bing , Zhang Wen Jun , Li Chang Qing , Wang Xue
Published: August 2013

Before the channel allocation of wireless networks, usually need to select the appropriate channel conflict model to model the channel collision. For the current channel conflict model cant model the channel collision comprehensively, the graph N-tuple coloring model based on graph N-tuple coloring theory is proposed in this article. The theoretical analysis and simulation results show that this model can model the channel collision comprehensively, and transform the channel allocation problem into N-tuple coloring problem on a graph for the further analysis and solve.
Realization of Real-Time Data Exchange between OPC Client and Multiple Remote Servers
Authors: Li Da Hua , Li Hang , Zhang Kai Lin
Published: August 2013

The submitting of OPC (OLE for Process Control) has promoted the progress of the data collection in process control and industrial automation, and formulated the industry standard for the process real-time data exchange. Aiming at the key problem of ensuring the use of application program as OPC client to link multi-remote OPC server and real-time collect process data in control system, OPC technology and the connection and access technology of multi-remote OPC server were introduced and analyzed in detail. This method has been successfully applied to develop the DCS I/O communication and control loop error test software, and provided better performance.
The Fatigue Life Prediction for the Transmittal Belt
Authors: Yue Qian Bei , Liu Ju Bao , Gao Shen Rou
Published: August 2013

The article carries on the question of the failure of the transmittal belt of the small supple-like pumping unit in Daqing oil field. But the fatigue life is not forecasted accurately. According to the characteristic that the pumping unit stands alternating dynamic load and the contact between transmittal belt and band wheel, this article established the finite element model of transmittal belt using ANSYS software. The model considered the biggest and the smallest stresses in the belt during a circle .It also established four element models in four special conditions and calculated respectively the stress in each time .Taking all the stress into considered and uniting the fatigue curve, it completed the fatigue life analysis.Through the comparative analysis with the fatigue life that the working site statisticsed in all kinds of behaviours, its error is smaller than 5%. It explains that this model is able to forecast the transmittal belt’s fatigue life more accurately. So it provides the reliable basis for making and choosing the transmittal belt.
The Architecture of IOT Smart Service System of Ocean Fishing Vessel and its Application Based on Petri Net
Authors: Chen Cheng Ming , Yu Li Juan , Ling Pei Liang , Yang Jin Song , Cao Shou Qi
Published: August 2013

Founded on the requirements of ocean fishing vessel and its operating system, this paper discusses and structures the architecture model of open service components based on a new-type IOT (Internet of Things). Then, this paper disserts the dynamic representation method of service components relationship in the system based on the Petri net. Under the effect of this method, the users overall acquisition capability of the service component base has been enhanced, which contributes to discover the conflict and redundancy of solving among the service components and provide an intuitive illustration mechanism for the combination configuration of service components. The intelligence of the system and the advantage of SOA are evaluated as well. Meanwhile, the reliability of the method is proved by means of the experimental simulation in this paper.
A Research on KVM I/O Performance
Authors: Yu Lie Bin
Published: August 2013

With open source, stable performance, simple structure, integrated in Linux kernel, and good performance, KVM (Kernel-based Virtual Machine) gets wide attention from major IT vendors and academia circles. However, virtualization technology will introduce additional overhead, especially in the I/O virtualization. The current researches about KVM have been carried out mostly focused on the performance comparison and analysis between virtualization solutions. There is no systematic study of the KVM I/O performance. In this paper, the I/O architecture in KVM is firstly studied, and then the disk and network performance of fully virtualization KVM and Para-virtualization KVM with all the different configurations are systemically tested and analyzed. Both the KVM I/O performance and the influences of the different configuration options on the performance are figured out in this paper. These are quite important and useful for the users and designers.
Research and Development of Mes System for Gearbox Production Line
Authors: Wang De Quan , Wang Ke Xin , Ding Jin Hua , Gao Teng , Ji Tian
Published: August 2013

According to the characteristics of manufacturing execution system and transmission manufacturing industry (MES) demand, the MES software architecture based on OPC Technology, establishment of real-time visualization of the gearbox assembly process based on workflow, real-time production process tracking, real-time and interactive technology of PLC framework. The system can meet the requirements of mixed production line, guiding device, realize the flexible production. The development of MES system has been applied in a transmission line and stable operation.
Structural Topology Optimization for Improvements of some Shell Structures' Rib Design Process
Authors: Sun Jian Xiang , Yang Ye , Tian Jing Yi
Published: August 2013

In order to overcome the shortcoming of traditional mathematical model of topology optimization which aims to the continuum structures, a new implementation combined with TOSCA Structure software is presented. To examine the accuracy of optimal topology of this kind of structural, the programming scheme for the conceptual design of one shell structure using topological optimization approaches is set firstly, then build up a new topology optimization design method of the shell structure rib model. Through the FE simulation calculations from Project 1 to Project 4, different improvement results of maximum displacements are obtained. These results demonstrate the validity and reliability of the method.
Evaluation of a Steam Jet Refrigerator with the Varying Specific Heat Ratio
Authors: Cui Wen Bin , Su Feng Min , Li Hai Jun
Published: August 2013

To predict the working performance of the jet refrigeration system more precisely, including the condensing temperature and coefficients of performance, this paper presents a 1-D analysis model with the varying specific heat ratio. During the evaluation, the working process of the constant pressure ejector is divided into three sections with different specific heat ratios. By comparing the results from Eames experiment, the simulation results indicate that this model is more reasonable, and the error of the simulation is within 20%, which is significantly smaller than the error of Eames model at 40%.
Numerical Simulation on Convective Heat Transfer in Microchannels of Two-Stage Y-Branch Bifurcation Structures
Authors: Huang Yan Lu , Zhu Ben Ming , He Yong Tai , Li Hui , Li Wen Fang
Published: August 2013

Convective heat transfer in microchannels of two-stage Y-branch bifurcation structures at different inlet velocities and branch angles were simulated, and the temperature, static pressure drop as well as the relationship between Reynolds Number (Re) and Nusselt Number (Nu) of fluid were compared and analyzed. The results indicate that the flow in microchannels with 30° branch angle has the minimum pressure drop for the velocities from 0.5 m/s to 2.5 m/s, while it comes at 60° for the velocities from 2.5 m/s to 3.5 m/s. It can also be found that the laminar-turbulent transition comes in advance compared with the common round channels. The critical Reynolds Number is found to be in 1997-2224, which is smaller than the known value of 2300. The Nu increases with increasing Re with a same trend for the different branch angles.
Under the Action of Earthquake Mechanics Analysis of the Infill Wall in Plane
Authors: Cheng Hao , Yang Xiao Dong
Published: August 2013

Using finite element software SAP2000 solid model element to simulate the infill walls filled wall by the elastic conditions, and to simplify the calculation model, the use of elastic mechanics calculated infill wall subjected to earthquake plane wall crack development trend of the structure designed to prevent cracks in the wall of the measures will certainly help.
Measuring and Analyzing of Static Characteristics of Vehicle Capacitance Weighing Device
Authors: Shi Hui
Published: August 2013

Aiming at improving the present traffic weighing method, a kind of traffic weighing device based on capacitance weighing is developed. In this paper, the devices design, structure and measuring principle are introduced, and measuring process of static characteristics is mainly discussed. The related experiment data is given. On the basis of testing data, error analyzing is done from nonlinearity, repeatability and hysteresis. And the correction method of hysteresis is presented at last. This vehicle capacitance weighing device possesses outstanding advantages. Therefore it has a certain practical value.
Fault Diagnosis for Temperature Signal of Turbine Blade Based on LS-SVM
Authors: Chen Li Wei , Wang Chen Dong
Published: August 2013

This document discusses the support vector machine (SVM) algorithm, then discusses least squares support vector machine (LS-SVM) algorithm, at the same time, the applications of SVM in the fault diagnosis of temperature signal of turbine blade being discussed, the least squares support vector machine algorithm being used in the research of fault diagnosis, being compared with LVQ neural network, experiments result show the operation speed of the least squares support vector machine algorithm is fast, its generalization ability is stronger, SVM can solve small sample learning problems as well as no-linear, high dimension and local minimization problems in the fault diagnosis of temperature signal of turbine blade.
Research on Intelligent Diagnosis Technology of Transformer Fault
Authors: Wu Hong Qi , Li Xiao Bin
Published: August 2013

In order to improve the diagnosis rates of transformer fault, a research on application of RBF neural network is carried out. The structure and working principle of radial basis function (RBF) neural network are analyzed and a three layer RBF network is also designed for transformer fault diagnosis. It is proved by MATLAB experiment that RBF neural network is a strong classifier which is used to diagnose transformer fault effectively.
An on Line Method of the Steady-State Data Acquisition
Authors: Yang Jia , Bao Hai , Wang Ling , Liu Gang
Published: August 2013

Steady-state power flow calculation belongs to power system steady-state analysis, and the data used in calculation should be steady-state data. However, the existing SCADA system hasnt distinguished the transient data from the steady-state data. The real-time measured data reflect the dynamic electric power system. It is the right reason for not all of the real-time measured power can be used for power flow calculation. In another word, it causes the matching problem between measured data and power flow calculations. Based on the current situation of information collection system, the characteristics of the measured data had been analyzed in this paper. And an effective acquisition method for steady-state measured data is proposed on the theoretical basis of the law of large numbers. It uses the average value of the measured data that in the same load state to approximate the steady-state true value in one period. And the steady-state data can be used in power flow calculation. The simulation results show that the method proposed in this paper ensures the accuracy and reliability of power flow calculation.
PLC Applied in the Three-Phase Stepper-Motor Control System
Authors: Bu Xiao Yu , Liu Ping
Published: August 2013

The paper gives the introduction of characteristics and the work principle of the three-phase stepper motor. A method based on Siemens PLC (programmable logic controller) to the three-phase stepper motor control, PLC controlled the stepper motor by changing the system control parameters corresponding program to realize the three-phase stepper motor start and stop control, positive/negative control and speed control, can improve the control system flexibility and reliability, and obtain good control and accurate position.
Steam Dewaxing Casting Controller Based on S7-200 PLC
Authors: Zong Jing Bin , Ding Jin Hua , Rong Qiang Qiang , Wang De Quan , Gao Teng , Li Xiao Meng
Published: August 2013

Aim at introducing the hardware equipment of the steam dewaxing casting, automation control principle and wax model shell recycling. Realized the automation steam dewaxing based on S7-200PLC, upper PC machine monitors the whole process of dewaxing with exchanging data through HMI, and put forward the best time and pressure to aerate.
Analysis on Additional Pressure of Tube Sidewall of Immersed Tube Tunnel in Sinking Process of Tube Segment
Authors: Li Ya Dong , Mo Hai Hong , Chen Jun Shen
Published: August 2013

The numerical simulation analysis on the whole process of the tube immersing is researched, which use computational fluid dynamics method, is based on RNG k~ε turbulence model. The analysis shows that: additional pressure of tube lateral wall depends on the changed flow field cause by tube immersing; through the analysis, it have explored the special position of additional pressure changes in the process of immersing; it also shows some problems should be paid attention, through analysis the stress of special position.
Failure Analysis of CCF300/5428 Laminates under Low Velocity Impact Based on Properties of Advanced Composite Material
Authors: Zhang Jian Yu , Li Ming , Zhao Li Bin , Fei Bin Jun
Published: August 2013

A progressive damage model (PDM) composed by 3D FEM, Hashin and Ye failure criteria and Changs degradation rules was established to deeply understand the failure of a new material system CCF300/5428 under low velocity impact. User defined subroutines were developed and embedded into the general FEA software package to carry out the failure analysis. Numerical simulations provide more information about the failure of composite laminates under low velocity impact, including initial damage status, damage propagation and final failure status. The history of the impact point displacement and various damage patterns were detailed studied.
FEM and Experimental Modal Analysis of a Large-Scale Quayside Container Crane
Authors: Qin Xian Rong , Liu Ying Hua , Liu Yuan Yuan , Zhang Qing , Sun Yuan Tao
Published: August 2013

In this paper, FEM modal analysis and experimental modal analysis methods were used to investigate the modal performance of the metal structure of a quayside container crane. The analysis results indicated that the relative error of both methods was reasonable small, and that most inherent vibrations of this crane were in the horizontal plane. The influence of vibrations caused by mass eccentricity of container and wind loads should not be ignored. The present results can provide a reference for solving similar problems in the future.
Natural Convection in a Differentially Heated Cavity Using Splitting Method
Authors: Ubaidullah Selamat , Osman Kahar
Published: August 2013

The solution of thermally-driven flow of Navier-Stokes equation, in Boussinesq approximation, is presented. The results are obtained using splitting method and in good agreement with available benchmark numerical solutions. The convection terms are explicitly integrated using 3-step Range-Kutta scheme. Buoyancy-driven fluid flows data in a differentially heated cavity for low Rayleigh numbers (R=1000, R=10000 and R=100000) are presented.
Analysis of Small Bubble Characteristics in Alum Solution
Authors: Warjito  , Nurrohman
Published: August 2013

Understanding the dynamics of bubbles is necessary in an effort to increase the efficiency of separation of flotation process. The purpose of this research was to study characteristics of small bubbles (bubbles with diameter of 0.2-1 mm), which rise in a liquid column. Experimental set up was a column made of an acrylic pipe with inner diameter of 8.4 cm and length of 200 cm. Small bubbles were generated by copper cathode. The dynamics of bubbles were observed using a video camera. Video images were processed using image processing software. The results indicate that at height of 50 cm from cathode tip bubbles in average have reached its terminal velocity. It has been proven that effect of alum surfactant can reduce the bubbles terminal velocity.
Research Based on the PDM Ship Parallel Collaborative Design
Authors: Chi Zhen Hua , Liu Yin Dong
Published: August 2013

This paper analyzes the technology based on the PDM ship parallel collaborative design, studies the features of ship parallel collaborative design, describes the application of distributed database in the ship parallel collaborative design project.
Study about Controlling of Procurement Cost of Construction Material
Authors: Wang Rui Ling , Li Shi Rong , Deng Xiao Lin
Published: August 2013

Cost controlling is key behavior of getting more profits in an enterprise, but the cost of construction material cover 40-60 percent or more. So, reduce its cost as less possible as on the premise of insuring material quality is very important. The article starts from this, and gives some suggestions about controlling of the cost of construction material.
Component Selected Parametres Geometrical Tolerance Value Experimental Specification
Authors: Maščeník Jozef , Pavlenko Slavko , Bicejova Luba
Published: August 2013

The submitted paper deals with an analysis of geometric deviations, reasons of their generation and provides their brief description. It points at ways and abilities of measuring shape deviations by means of contact and contactless measuring methods and deals with errors which can affect results of measuring. The papers also says about practical measuring geometrical deviations by commonly used tools. It evaluates and analyses ability of measuring by various devices. It shows a review of individual measured values and thus provides a view of efficiency, simplicity and accuracy of individual measuring methods and measuring devices.
Design of the Main Parameter of Large and Heavy Workpieces Upender for Shell Units of Nuclear Power and Hydrogenation Equipment
Authors: Qiu Xue Song , Wang Lei , Zeng Da Xing , Liu Jia Qi , Zhou Yu Lin
Published: August 2013

In the production process for large and heavy workpieces of Nuclear Islande equipment and Hydrogenation reactor, Turn is the important technics of the convergence of every technological process, and a direct impact on production efficiency and production safety and production quality. The researching and manufacturing of overloaded upender for large and heavy workpieces will effectively contribute to the improvement of the production capacity. The force model under maximum load conditions is established. The force of upender body in the eversion process is analyzed. The main drive torque formula for upender turnover is obtained. From the actual functioning of the overloaded upender for large and heavy workpieces, carring a maximum load, the upender flip process is dynamic simulation on ADAMS. After the results were compared with theoretical calculations showed that: the variation between the two is consistent. The main parameter for driving of upender is designed. By theoretical calculations confirming simulation with each other, in simulation model, the feasibility of using the contact vice for defining non-hinged rotation vice is verified. And a new solution is provided for adding non-hinged rotation vice constraints to a similar shstem dynamics model. In this paper work it has an engineering value for the design of large and heavy equipment.
Modeling of Vertical GaN Based Resonant Cavity Light-Emitting Diode
Authors: Li Kai , Guo Zhi You , Li Mei Jiao , Zhu Ming Jun
Published: August 2013

Vertical structure of resonant cavity light-emitting diode (RCLED) is presented in this paper to further improve the photoelectric performance of the device. Modeling and 2D simulation have been proceeded with Crosslight APSYS[, the analysis and modeling software for semiconductor devices. Main results of the simulation are listed and discussed. The peak wavelength locates at about 550 nm with half-wave width of about 10 nm and its output power has been enhanced by 25% than the conventional one. The results prove that vertical RCLED is a considerable source for POF-based fiber communication.
The Diagnostis Method of Control Valve Stiction
Authors: Shang Qun Li , Ding Zheng
Published: August 2013

Valve stiction is one of the main reasons which lead to control loop oscillation.However, there is not a mature method to diagnose the stiction.Under the premise of unknown the control system model,this paper put forward a new method based on the process output signal processing to realize control valve stiction of fault diagnosis.The results of the experiment and simulation to show that the method is effective.
A Low Cost Data Logger for Industry Applications
Authors: Wang Ping Chieh , Uang Chii Maw , Ho Zu Sheng
Published: August 2013

The data logger is an important experimental apparatus for any experiments, even could affect the results. Unlike traditional data recorder, a modified portable data logger with advantages of high performance, small size, high storage capacity and easy use for any applications is been provided. This machine based on low power ARM cortex-m3 and no license fee BSD software, includes dual USB disk, small flash memory embedded inside machine for low range data record, a removable SD card for high range data record, a RS232 terminal for engineering function or debug, a simple controllable software filter, a small LCD and three keys as human interface for easy using.
Control for the Lift of the Inlet Valve - Electromagnetic Drive Assembly with the Effect of Friction
Authors: Rylski Adam , Siczek Krzysztof
Published: August 2013

It has been analyzed the assembly of electromagnetic drive - inlet valve operating in camless valvetrain. The valve made of TiAl alloy has mated with its guide made of phosphor bronze. The scheme of electromagnetic valve drive has been shown in the article. The head aim of the motion control for such valve has been to provide small values of the valve velocity near the valve seat position. The aim of present analysis is to study the course of friction force between valve stem and its guide against time during use of control algorithm presented in the article. Curses of generated electrodynamical force against displacement of coil - valve assembly has been computed using FEM method and presented in the article. The courses of valve lift against time for different conditions have been presented in the article.
Design of Grating Displacement Measuring System Based on Single Chip Microcomputer
Authors: Han Wei Na , Yu Peng , Li Qun Li
Published: August 2013

The thesis presents a set of design scheme of grating displacement measuring system by taking SCM (Single Chip Microcomputer) as the core component. It describes the system design principle and the design process of software and hardware in details, i.e. realizing standard TTL level signal output through the processing of grating output signal amplification, sub-dividing, modulation and driving, so that grating output signal could match the numerical control system. It turns out that the designed grating displacement measuring system is able to satisfy the requirement of high-speed sampling and storage and feasible to be used for the measurement of actual grating displacement. The system has a simple and compact structure and a lower price, and owns favorable practical performance.
The Brief Analysis on a Broadband VCO
Authors: Zhang Hong Bing
Published: August 2013

Multiband transceivers are very popular nowadays. As a key component in the system, the broadband VCO is a hot research topic. This paper presents a broadband inductor capacitor voltage controlled oscillator (LC-VCO) with an adaptive frequency calibration (AFC) circuit. The VCO uses a 5-bit differential switched-capacitor array for extending the tuning range. Two couples of AMOS varactors are employed to linearize the VCO tuning gain. An AFC circuit is utilized to automatically select the optimal sub-band for the VCO by binary search algorithm.
Beijing Rural Energy Consumption and the Use of Renewable Energy Sources
Authors: Yang Peng Yu , Zhao Li Yuan , Liu Zhong Liang
Published: August 2013

The rural energy is one of important factor in energy system, which connects closely with new rural construction. The analysis on Beijing rural energy problems will benefit to solve the national rural energy problems on referential meaning. In this paper, the situation of Beijing rural energy problems in 2007 is analyzed, and the problems which exist in rural energy development are found. Meanwhile, it introduces the policy of Beijing rural energy construction and its target, and suggests that rapid developing the rural renewable energy in order to adjust the structure of Beijing rural energy consumption.
Digital Discrete Method for Oversampling
Authors: Bi Yan Chao , Yao Xiao Xian , Song Xiao Dong
Published: August 2013

Traditional discrete method, converting order continuous system to order difference equation, describes system using the information of sampling points. But the system response in the time of will not be sufficient to describe the system when sampling period is much larger than the bandwidth of the system. By analyzing differential discrete method, our design gives an improvement to take out of the influence of the system bandwidth. In this method, order continuous system is transformed into order difference equation and the information of sampling points can be used to describe the system. It is proved that modified difference transformation is better in interference rejection than traditional difference transformation by comparing the simulation between the two transformations. The hardware implementation using TI's TMS320F2808 shows that modified difference transformation has a deviation close to round-off error based on simulation with a linear increase of operating time.
Medical Image Enhancement Method Based on Wavelet Transform and Mode Decomposition
Authors: Dong Ao Shuang , Lou Bin Bin , Jiang Hui Yan , Tong Qiang , Yang Guang Ming , Gao Tian Han , Yang Ben Qiang , Zhang Li Bo
Published: August 2013

Traditional medical image enhancement method has some disadvantages. They can not significantly improve the medical image edge, texture and detailed information. Besides the enhancement effect is susceptible to interference noise information. This paper proposed enhancement algorithms combining bidimensional empirical mode decomposition and the wavelet edge enhancement method. The first step is using the method of bidimensional empirical mode decomposition to process medical image, achieve image information with different frequency. And then our method using wavelet transform to enhance different frequency image edge, texture information. Through the comparison of proposed method with the existing method, it has been verified the proposed method has a better effect in the detail enhancement of medical images.
Vibration Analysis of Rub in Rotating Machinery
Authors: Hee Lim Meng , Leong M. Salman , Keng Ngui Wai
Published: August 2013

Rubbing is one of the most common faults that occurs in rotating machinery. This paper studies the vibration responses of a rotor system under the influence of blade induced rubbing. An experimental study was undertaken to simulate various conditions of rubbing in rotor system caused by rotating blades and its corresponding vibration responses are measured and analyzed. Experimental results showed that the effect and vibration responses caused by blade rubbing is enormous and therefore can be easily detected based on vibration spectrum analysis. Besides this, the severity of rubbing caused by different conditions of blades could also be estimated based on the magnitudes and patterns of vibration spectrum.
Off Design Behavior of a 100kW Turbec T100P Micro Gas Turbine
Authors: Chiariello Fabio , Reale Fabrizio , Calabria Raffaela , Massoli Patrizio
Published: August 2013

The off design behavior of a 100kW Turbec T100P micro gas turbine fuelled with methane is analyzed in the paper. The work is focused on the analysis of combustion efficiency, overall performance and gaseous emissions at different loads. A critical comparison between experimental data and results of a 3D CFD analysis of the combustor is discussed. The RANS RSM turbulence model is used in the numerical computations. The Zeldovich mechanism for NO formation evaluation is coupled to a methane-oxygen multistep chemical kinetic mechanism for predicting the concentration of O2, CO2, CO and NO at the exhaust. The experimental campaign showed no sensible variations in NOxemissions by varying MGT load; otherwise a great CO increasing is highlighted by load decreasing. The results of numerical analysis are in good agreement with experimental data as concerns CO emissions, while overestimate NO production in the diffusive flame region at 50% load.
UV-Visible Emission Spectroscopy of the Combustion Process in a Common Rail Cl Engine Fulled with N-Butanol - Diesel Blends
Authors: Tornatore Cinzia , Marchitto Luca , Merola Simona Silvia , Valentino Gerardo
Published: August 2013

This paper is focused on the study of the effects of the injection strategy and fuel blends on spray combustion and soot formation in compression ignition engines. UV-visible natural emission spectroscopy was applied in the combustion chamber of a single cylinder high swirl compression ignition engine equipped with a common rail multi-jet injection system. The engine was fuelled with low-sulphur neat diesel and blended with 20 and 40% by volume of n-butanol. For all the fuels, the evolution of radical species, such like OH and soot was followed during the spray combustion processes examining different pilot-main dwell timings. Optical data were correlated to engine parameters and exhaust emissions.
An Adaptive & Fault Tolerant SINS/GPS Integrated Navigation Scheme Robustified against Slowly Growing Errors in GPS Updates
Authors: Ushaq Muhammad , Cheng Fang Jian , Ali Jamshaid
Published: August 2013

The Strapdown Inertial Navigation System (SINS) renders excellent attitude, position and velocity solutions on short term basis, but when used as stand-alone navigation system, its accuracy deteriorates with the passage of time. On the other hand GPS has long-standing stability with a consistent precisiongenerally having only bounded random errors in position and velocity. Integrated navigation system is used to augment the complementary features of SINS and GPS. In integrated navigation system external fixes for position and/or velocity and/or attitude are used to contain the growing errors of SINS. Kalman filter is generally used as integration tool for integrated navigation system. Kalman filter algorithm is based on the assumptions that the system model and the measurement models are linear and the system random errors and measurement random errors are Gaussian in nature expressed with fixed covariances. But in real navigation systems these assumptions are seldom fulfilled and hence Kalman filter renders unsatisfactory results. Adaptive Kalman filter provides the solution to the problem by adjusting the system noise covariance and measurement noise covariance in real time in the light of actual measurement errors or actual dynamics of thevehicle. In this paper an innovation and residual based adaption of measurement noise covariance and system noise covariance is presented. The presented scheme has been applied on an SINS/GPS Integrated Navigation Systemand it has been validated that the scheme provide significantly better results as compared to standard Kalman filter on occurrence slowly growing errors as well as excessive random errors in GPS measurements.
Microgravity Experiment Research on Orbital Refueling Process in the Vane Type Tank
Authors: Hu Qi , Li Yong , Pan Hai Lin , Zhuang Bao Tang
Published: August 2013

Aiming at vented orbital refueling, the microgravity experiment research on orbital refueling process (ORP) is carried out in the paper. By using the microgravity test system of orbital refueling and proper experiment means, the microgravity drop tower (DT) test of all the ORP is accomplished triumphantly, then the transformation process of fuel surface and flow characteristic are obtained, and the extrusion efficiency of the refueling tank is gotten, and the on-orbit propellant resupply performance of VTT is validated. The results indicate that, the orbital refueling in the vane type tank is absolutely feasible, and the performance of propellant management device (PMD) in the tank is good.
Design and Tests of Wind-Tunnel Sidewalls for Receptivity Experiments on a Swept Wing
Authors: Romano D.G. , Alfredsson P.H. , Hanifi A. , Örlü R. , Tillmark N. , Borodulin V.I. , Ivanov A.V. , Kachanov Y.S. , Minervino M.
Published: August 2013

This document explains in its first part the design procedure adopted to design the contoured sidewalls of a swept-wing airfoil section mounted in a wind tunnel in order to satisfy the infinite swept-wing approximation. In the second part, the experimental set-up is described as well as the first results of the experimental campaign. The sidewalls are shown to play their role properly and satisfactorily provide the infinite swept-wing conditions required for subsequent investigations of the most important vortex receptivity mechanisms responsible for excitation of crossflow and Tollmien-Schlichting instability modes in the airfoil boundary layer.
Rectifying Process Problems in Production of Thin Sheets of Special Alloys
Authors: Martínek Petr , Podaný Pavel , Poláková Ivana , Tuček Jaroslav
Published: August 2013

The paper deals with solutions to particular process problems in production of thin sheets of special nickel and iron-based alloys. Experiments were focused on trial operation of a new melting furnace, on hot rolling of feedstock from experimental heats and on fine-tuning hot and cold rolling processes with the aid of numerical modelling in DEFORM 3D software. The paper also gives description of results of FEM simulation of cold rolling of strips. A FEM model of the cold rolling process with front and back tension was developed. In order to describe the behaviour of nickel alloys in the FEM simulation, a specific material model was proposed. This material model combines the material data obtained from Rastegaev compression test and the results of thermodynamical calculation from JMatPro software.
Solidification in Laser Cladding of a Ti-Si Graded Coating on Pure Titanium Substrate
Authors: Yue T.M. , Huang K.J. , Xie H.
Published: August 2013

A three-layer Ti-Si graded coating was fabricated on a commercially pure titanium substrate by laser cladding with Ti-5.8 at%Si, Ti-9.0 at%Si and Ti-13.5 at%Si mixed powders. The microstructure of the three layers comprised Ti-Si solid solutions (Ti) and the Ti5Si3 compound. As the silicon content was increased, the microstructure along the direction of deposition underwent a series of changes, including replacement of the (Ti) phase by the primary Ti5Si3 phase, and a change of the (Ti)/Ti5Si3 eutectic growth from lamellar to anomalous.
The Characterization and Application of Polycarboxylate as a Superplasticizer in Concrete
Authors: Mo Xiang Yin , Yu Chen Jie , Feng Xiao San , Jing Ying Jie
Published: August 2013

Polycarboxylate was synthesized and the structure of the superplasticizer was characterized by FTIR. The water reducing effect of the synthesized copolymers was studied in terms of stirring time, the surface tension of superplasticizer and the adsorption on cement particles of superplasticizier. For all the samples tested in this research, increase in stirring time caused an increase in fluidity. The surface tension of the product solution (1wt%, w/w) is 51.2536 mN/m and the maximum value of adsorption was at about 2.6 mg/g at the concentration of 6wt%.
Research and Engineering Application of Wall-Outside Blasting Charge in Blasting Demolition of Underground Thin-Walled Structure
Authors: Chen De Zhi , Xu Shun Xiang
Published: August 2013

When the blasting method is used to demolish the underground thin-walled structure, the safety misadventure occurs possibly due to the small burden, the heavy workload of the drilling and excavation as well as the long construction time, thus, its demolition is more difficult than that of the foundation. This paper describes the new underground thin-walled structure blasting demolition method - the wall-outside blasting charge method and the primary discussion about the blasting mechanism of the wall-outside blasting charge method, which is used in engineering practice. The demolition practice has proved that the wall-outside blasting charge method is a safe, simple and efficient and economic method to demolish the thin-walled structure such as underground sinking well and the pool, its blasting fragmentation is uniform, the fly-rock is easily controlled, and this method has the good economic benefit and the application prospect.
Biosorption of C. I. Reactive Red 2 from Aqueous Solution by Saccharomyces Cerevisiae
Authors: Zhang Li Fang , Wang Yin Ling
Published: August 2013

The biosorption of C. I. Reactive Red 2 from aqueous solution onto biomass of Saccharomyces cerevisiae was examined. The biosorption studies were carried out under various parameters such as initial pH, contact time and initial dye concentration. The experimental results showed that optimum pH for dye biosorption was found to be 2.0 for the yeast biomass. The bosorption capacity was increased with the increasing initial dye concentration in studied dye concentration range. It was found that the adsorption equilibrium data followed the Langmuir adsorption model. The maximum adsorption capacity obtained from the Langmuir equation at temperature of 30°C was 500mg/g (R2=0.991) for the dye. The results indicate that the biomass of Saccharomyces cerevisiae can be used as an effective biosorbent to removal C. I. Reactive Red 2 from aqueous solution.
The Feasibility of Producing Green Energy Crops on Pb-Contaminated Soil
Authors: Cheng Shu Fen , Huang Chin Yuan , Tu Yao Ting , Lin Sheng Jie , Chen Guo Lin , Chen Jia Rong , Lai Chi Ying
Published: August 2013

For the agricultural land contaminated by heavy metal and thus not suitable for growing food crops, combining green crops with phytoremediation technology can provide more green energy crops and implement the soil remediation through a more economic green remediation method. This study selected three crops, which are rich in biomass energy and are suitable to grow in the climatic conditions of Taiwan, namely corn, soybean and peanut, for Pb-contaminated soil situ vegetation planting tests. The results show that the production of biomass by corn was the highest and each plant could produce 1248 g on average, followed by peanut with the average 470.2 g, soybean only 17.6 g. Regarding Pb absorption capacity, each corn could absorb 87.1 mg; peanut 125.3 mg; and soybean only 5.9 mg. Soybean is not feasible because the low biomass production and the total Pb absorption are far lower than those of corn and peanut.
Research on the Degradation of Herbicide-Quinclorac by Microorganism
Authors: Zheng Xiong Zhi , Zeng Wei Ai , Zhao Song Yi , Huang Yan Ning , Zhou Qing Ming
Published: August 2013

In order to study the degradation of herbicide----Quinclorac using microorganism, separate and screen the degrading bacteria CSUFTM62 from soil, this paper researched the degradation effect of bacterial strain on the Quinclorac under different situations, including different increments, different temperatures, different concentrations of pesticide, different pH, and different additive amount of nutrients. The results show that the optimal degradation temperature is 30 ° C; the optimum pH is 7; the degradation rate of Quinclorac reaches its maximum when the concentration is 50mg / L. Adding yeast extract could increase the amount of strain growth but never affect its degradation effects on Quinclorac; combined with the morphological characteristics, the strains CSUFTM62 is identified as the Stenotrophomonas maltophilia by measuring the 16S sequence.
Study on the Crystallinity and Mechanical Properties of PC/PLA/LLDPE/ Montmorillonite Blends
Authors: Chen Yi , Peng Yue , Liu Wen Yong , Zeng Guang Sheng , Li Xiang Gang , Yan Xue Hui
Published: August 2013

Polycarbonate/poly (lactic acid)/(PC/PLA) blend is a kind of novel potential material for introducing the degradability of PLA to high performance PC. However, the bad compatibility between PC and PLA results in poor impact resistance and strength, which limits its applications. For resolving the problem, linear low density polyethylene (LLDPE) was added into blend to improve the mechanical properties, especially the toughness. Meantime, nanosized montmorillonite was also used as an additive for modifying the blend. The results showed that the the tensile and impact strength, the elongation at break of PC/PLA all be improved with the increase of LLDPE, the nanosized montmorillonite could also increase the strength of blends when the content is lower than wt5% of blends.
Research on Student Model of Adaptive Learning System Based on Semantic Web
Authors: Xiao Jian Qiong
Published: August 2013

This paper came up with introducing four dimensions: learning mood, cognitive state, learning style and interest preference and so on for the semantic web, based on the analysis the present situation student models at home and abroad. Realized to classify learners and establish student models which used an improved similarity algorithm, and the student model applied to adaptive learning system, which not only could solve the lack semantic in adaptive learning system, and greatly improves the practicability, intelligent and personalized.
Database Design of Portable Mine Fan Performance Tester
Authors: Gao Wen , Ling Qun Li , Cui Xiang Hong
Published: August 2013

According to AQ 1011-2005 standards, developed a database based on MS SQL Server for portable ventilators test software. Detailed database design, using interfaces and the underlying implementation. Application examples show that the fan performance test software database design, for a large number of long-term accumulation of data, meet the convenient, fast and accurate calculation of the data management requirements.
Design of Digital Filter Based on DSP
Authors: He Juan , Xiong Fei Qiao
Published: August 2013

A digital filter based on DSP is designed in this paper, which is achieved through using linear buffer and shift double operation addressing. At the same time, FTSK data input through using CCS5000 simulation and the FTSK modulation signal is processed to output the desired waveform and spectrum. Experiments show that it has characters of high accuracy, good stability, easy transplantation, strong practicality and flexibility.
Based on the Industrial Design under the "Harmony" Culture
Authors: Ge Tao
Published: August 2013

This article described the inspiration and influence of the traditional culture of harmony of modern industrial design to prove the importance of play and harmonious culture embodied in the design ethics of the relationship between the three of balance and coordination, social and environmental sustainability.
Design Research on Composite Running Washing Machine
Authors: Liu Yuan
Published: August 2013

Composite product design is becoming a consumption ideology. It is formed with the changes of the modernity of the consumers, is developed according to the modern values and is the inevitable consequence of social development. The article clarifies the design concept of Composite Running Washing Machine from three aspects. First of all, we decide the product orientation and appearance shape design according to consumers, consumer demand and mechanical combination principle. Secondly, we grasp the influence of material quality on the whole visual effect according to what mental feelings on us of the character of the material and visual effects. Eventually, we explains the design concept of humanism from the perfect combination of functions and details. Thus the design shows great respect and care for human beings.