bluuebunny/crossref_metadata_2025 huggingface dataset:
The Modeling and Simulation of Super-Capacitor in Diesel Engine Starting Process
Authors: Cui Zhen Min , Wang Ru
Published: November 2012

Diesel engine; Super-capacitor; Starter system; Modeling; Simulation Abstract. In order to improve the start-up performance of the diesel engine and the working conditions of batteries, make efficient use of the high instantaneous discharge power characteristics of the super-capacitor as a diesel engine start-up auxiliary power. Taking the YC6J180 types of Yuchai diesel engine as illustration, diesel engine starting process was modeled and simulated by Matlab/Simulink software, and compared with the simulation model of diesel engine starting system added the super-capacitor. The simulation results show that the diesel engine starter system added the super-capacitor as the auxiliary power, the starting performance is improved significantly, meanwhile improve the battery state, and extend its service life.
Numerical Simulation for Fire Smoke of Subway Cross Transfer Station
Authors: Wang Feng , Zhao Yao Hua
Published: November 2012

This paper takes a certain typical cross transfer station of Beijing subway as the study object, establishes the physical and mathematical model for the movement of the fire smoke, adopts a computational fluid dynamics method to simulate the dynamic process of development and spreading of the fire smoke when fire occurs at two positions in the transfer station, discusses about the distribution rules of the temperature field, the velocity field, the visibility and so on which reflect the flow and development characteristics and further provides reference for making the smoke control and exhaust scheme and evacuation scheme. The simulation computation shows that when the fire occur in the subway transfer station, the ‘chimney effect’ is more obvious, and there are mutual action and mutual influence for the temperature field, the velocity distribution and the visibility distribution at the area connected with the transfer station.
Modeling and Simulation of PV Cell and its Application of MPPT
Authors: Gong Zheng , Wang Jing Jing , Gong Mao Fa , Liu Ning , Yang Ji He
Published: November 2012

According to the internal physical structure of photovoltaic cell and output V-I characteristic, the paper construct a solar module simulating model by engineering calculation method under the Simulink environment. In the light of the limited parameters of photovoltaic cell (PV), the model can give the entire output characteristic curve under the different intensity illuminations and the various temperatures. At the final of the paper, MPPT to solar module adopted a special method is researched based on the Simulink.
Study on the Location Method Based on Seismic Wave Detection
Authors: Xiong Chao , Zhang Bing Wen , Zhang Li , Ma Chun Ting
Published: November 2012

A location method based on seismic wave detection was put forward. The seismic wave was collected by high-precision seismic sensors which were set as five-element-square-array structure. The distance and azimuth angle were acquired according to the time delay estimation between each sensor. The result of experiment shows that the location method is effective and has a high precision.
An Improved Slope Classification Mapping Method
Authors: Li Jing Yi , Wang Yan Hui
Published: November 2012

Slope classification map is the essential condition of land resource reasonable using. This article aims at solving problems in progresses of conventional slope classification map making methods. Providing an improving method which bases on ArcGIS to make slope classification map, and discussing the progresses of improving method in detail with cultivated land slope classification as a example. This method works with merge, aggregation, and elimination to improve the effect of the slope map. The result of the experiment proves the feasibility and effectiveness of this method.
Numerical Simulation of Pressure Limits of Gas Storage in North Area of Lamadian Oilfield
Authors: Yin Dai Yin , Lu Jian Xin , Wang Shuai , Zhang Cheng Li
Published: November 2012

In order to grasp the change of oil-gas interface in north area of Lamadian Oilfield and determine the conditions of gas or oil invasion during the development of gas storage, the precise geological model is established. By simulation software Eclipse immigrations of gas-oil interface are tracing simulated and cases of gas or oil invasion are monitored under various pressure differentials, based on which the limits of pressure are provided at last. Simulation results indicate that when the pressure of gas region is higher than oil region the gas invasion will happen and when the pressure differential between oil and gas region is up to 0.6 MPa the oil invasion will happen after 16 injection-production cycles. This paper is valuable to practical project applications which keep the interface stable and avoid the gas and oil invasions.
Determination of the Significance of Tolerance Parameters on Robot Performance Using Taguchi’s Tolerance Design Experiment
Authors: Dao Son Duy , Abhary Kazem
Published: November 2012

Tolerance parameters have different effects on robot accuracy. Therefore, it is better to tighten the tolerances of the factors that have statistically significant effect on robot accuracy and widen the tolerances of insignificant ones. By doing so, one not only achieves the given robot accuracy but also reduces manufacturing costs. Objective of this paper is to present an approach used to determine statistical significance of each tolerance parameter of robot manipulator on robot accuracy which can assist robot designers in making decisions regarding tolerance design. In this paper, a comprehensive model of industrial robot manipulator capable of carrying out various applications is developed and computer simulated. Then Taguchi’s Tolerance Design Experiment is applied to determine the statistical significances of the tolerances on robot accuracy. The approach is illustrated by a case study dealing with 6-DOF PUMA 560 robot manipulator.
Matlab Routines Used for Real Time ETL Method
Authors: Halenar Robert
Published: November 2012

This paper describes how to build routines in Matlab environment for improved ETL process. New architecture real time ETL process stills automated without human – database administrator interference, in cost of reduced accuracy rendered by level of trust. This method is constructed in Matlab environment, due to simple transformation and convert routines and functions. Important is the selection of proper environment for implementation of real time ETL process. Using enhanced architecture of real time ETL process implemented in Matlab make this process stills automated without human – database administrator interference, in cost of reduced accuracy. This method provides a simple transformation and converting routines and functions. First we are describing advantages of Matlab environment followed by real time ETL process description and problem how to achieve real – time in real world. In next part we present our enhanced near real time ETL model with new architecture. And finally we show how to use Matlab routines and toolkit to achieve simplicity in ETL phases of data warehouse needed for simulation and modeling.
Influence of Rotation Speed on the Sterilization of a Steamed Liquid Food Can Using Numerical Simulation
Authors: Tang Jyh Haw , Chuang I Chieh
Published: November 2012

This paper presents an efficient way for the sterilization of a liquid food (liquid soup) can lying vertically and rotated axially by using a commercial computational fluid dynamics package (ANSYS FLUENT). Aside from the forced convection applied by rotating the can, the simulation involved effect of the natural convection with steam heating to 121°C around all of the can sides. The liquid food in the can was assumed to have constant properties, except for the density (Boussinesq assumption) and viscosity (temperature dependent). By solving the governing equations of mass, momentum and energy, we compared the temperature profile in the thermal sterilization which emphasizes the slowest heating zone (SHZ) of viscous rotation speeds compared to that of a stationary can. The simulation results of temperature profiles with different rotation speeds (5, 10, 15, 20, and 25 rpm) for different periods (1, 19, and 43 minutes) indicated that the combined effect of natural and forced convection causes the higher temperature to reach all of the locations of the SHZ with increased rotational speed. With the higher rotational speed, the heating process time is further reduced when reaching the same lowest temperature at the SHZ of the liquid food can.
Properties of Thermal Conductivity on Polyimide/Clay Nanocomposite Foams
Authors: Kim Eunk Young , Jeong Seung Yong , Shin Gyo Jic , Lee Sang Kug , Choi Kyung Ho
Published: November 2012

We synthesized polyimide (based on ODA-PMDA) and polyimide foam and polyimide/clay foam that pore size was uniform about 1㎛. We identified that the clay layers are well dispersed in polyimide matrix and achieved exfoliation structure by X-ray diffraction. And we compared thermal conductivity of PI, PI foam, PI/clay foam. Thermal conductivity decreased up to maximum 28 % by introducing both pores and clay layers. Exfoliated structure of clay leads to decrease of thermal conductivity by thermal barrier effect. Also, the presence of clay could considerably reinforce the poor mechanical properties of polyimide by foam because of interfacial interaction between clay layers and polymer matrix. Through the this results, it has shown that this study may provide an effective method to prepare polymer/clay nanocomposite foams having exfoliation structure, and can be used as insulating material having low thermal conductivity.
Design of a CANopen Slave Node Based on AT90CAN128
Authors: Chen Zai Ping , Liu Xue Wei
Published: November 2012

As an application layer protocol of CAN bus, CANopen has wide application in industry. This paper presents a kind of CANopen slave node based on AVR hardware platform of AT90CAN128. Firstly the structure of the slave node hardware platform of the AVR microcontroller AT90CAN128 and CAN bus control based on embedded CAN driver module CTM1050 is proposed. Then the open-source protocol stack CANFestival software design and the specific method are described. CANopen network testing platform is built to test the design of the CANopen slave node. The experimental results illustrate that the proposed solution and implementation method is correct and effective.
Research on Synchronization Control of Dual-Motor Driving for Large Rotary Car Dumper
Authors: Jin He Rong , Lu Xiu Chun , Zhang He , Yi Ya Li
Published: November 2012

Car dumper is an important material transport equipment which has characteristics such as large structure, heavy duty, low frequency operation, stop-and-go and recurrent excursion of machine barycenter. This paper researched implementation of synchronization control. A fuzzy controller is added between two channels of dual drive subsystem. Based on coordinated control principle and achieving the goal of difference minimum of corresponding state of two subsystem, a fuzzy correction control program using in-phase error non-uniform common feedback is adopted to make the output of two synchronous subsystem consistent basically, which increase response speed of system to synchronous error, reduce synchronous error of dual drive subsystems effectively, ensure the consistency of car dumper dual drive, solve the recurrent mechanical failure caused by inconsistency of dual drive and enhance the steady reliable operation of car dumpers. The synchronization control strategy presented by this paper provides favorable guarantee for synchronization precision of multi subsystem in large rotary equipments and at the same time explores new ideas for other synchronization control systems.
Research on Use Control Strategy of New Types of Vehicles
Authors: Zhao Yan Hui , Dai Xi Liang , Li Chun Liang
Published: November 2012

This paper makes analysis of new types of Vehicles and life-cycle cost distribution according to new typed of vehicle structure, and then makes analysis of the use intensity and the degrees of aging of new types of Vehicles, at last this paper proposes a new use control strategy.
Application of a Position-Force Control Method in a Master-Slave Teleoperation Construction Robot System
Authors: Huang Ling Tao , Kawamura Takuya , Yamada Hironao
Published: November 2012

The purpose of this research is to develop a control method that can provide an operator with a suitable force feeling for grasping fragile or soft objects so as not to totally crush them. This research examines a master-slave control system for a teleoperation construction robot in which a shovel with a fork glove, having four degree of freedom, is regarded as slave side and two joysticks are regarded as master side. In the previous study using a position-velocity control method, two joysticks manipulated the shovel according to the velocity of its piston. However, it was found that the reaction force to the joysticks in grasping fragile or soft objects was insufficient for operators and they were compelled to feel strange while moving the joysticks, because they had to remove the joystick to a middle position to avoid fully grasping the object. A position-force control method, in which the reaction force to the joystick is used as feedback instead of the velocity of a piston, is proposed to overcome the problems. Its effectiveness is verified by experiments of grasping a tin block and a urethane foam block.
An Approach to Automatic Great-Scene 3D Reconstruction Based on UAV Sequence Images
Authors: Xiong Zi Ming , Wan Gang
Published: November 2012

In this paper, we propose an approach to automatic great-scene 3D reconstruction based on UAV sequence images. In this method, Harris feature point and SIFT feature vector is used to distill image feature, achieving images match; quasi-perspective projection model and factorization is employed to calibrate the uncalibrated image sequences automatically; Efficient suboptimal solutions to the optimal triangulation is plied to obtain the coordinate of 3D points; quasi-dense diffusing algorithm is bestowed to make 3D point denseness; the algorithm of bundle adjustment is taken to improve the precision of 3D points; the approach of Possion surface reconstruction is used to make 3D points gridded. This paper introduces the theory and technology of computer vision into great-scene 3D reconstruction, provides a new way for the construction of 3D scene, and provides a new thinking for the appliance of UAV sequence images.
A Novel Digital Governor for Diesel Engine Based on Nonlinear PID Strategy
Authors: Zhou Yong , Zhang Yu Feng , Jiang Hong Kai
Published: November 2012

In order to enhance the reliability of small power generating units, a strategy of the self-tuning control of nonlinear PID for the digital governor is presented. By analyzing the control system of the diesel engine, the basic control parameters are confirmed. Compared the digital PID with the traditional PID, a novel self-tuning control strategy is proposed, which uses the nonlinear PID algorithm. The principle of the nonlinear PID parameters is proposed, the tables of the detailed data are presented. The hardware platform of this structure is composed of host-computer and servo-controller. Using this system, the response speed could be enhanced. For the better performance of this system, the Smith Prediction is used in the control strategy at the proportional process. At the end of this paper, the experiment results verified that the control strategy is reliable, the nonlinear PID parameters are rational, and the system has better dynamic response.
A Multiple Criteria Decision Method for Selecting Maritime Search & Rescue Scheme
Authors: Guo Chuan Fu , Zhang Shan Bin , Jiang Ying Shuai
Published: November 2012

The evaluation and selection of Search And Rescue (SAR) schemes is one of the most important decision issues for maritime SAR. Owing to vague concept frequently represented in decision data, a group fuzzy multi-criteria decision-making approach is proposed to solve the SAR scheme optimal selection problem. In the proposed method, the experts’ opinions are described by trapezoidal fuzzy numbers, and the fuzzy Delphi method is adopted to adjust each expert’s opinion to achieve the consensus condition. By using the logarithmic least square method and trapezoidal fuzzy number arithmetic operations to estimate the normalized fuzzy priority weights, Analytic Hierarchy Process (AHP) is presented and consequently the consistency check of fuzzy judgment matrix is avoided. The results of simulation show that the method is flexible and credible and provides references in intelligent SAR decision-making.
Automatic Radar Waveform Recognition Using SVM
Authors: Gao Hao , Zhang Xu Dong
Published: November 2012

In this paper, a new feature for radar waveform recognition based on the instantaneous frequency is proposed. It is especially utilized for discriminating phase coded signals from other signals. Maximum likelihood estimation (MLE), autocorrelation algorithm, and likelihood ratio test are exploited in the algorithm. In the classification system, support vector machine (SVM) offers an efficient approach to classify linear frequency modulation (LFM) signals, phase coded signals and single frequency signals. Simulation results indicate that the new feature vectors perform effectively over a large range of SNRs. Furthermore, the new classifier achieves a very robust performance that the correct rate is over 90% at SNR of 5 dB, and the ever-increasing rate has been over 97% since SNR of 10dB.
Dynamic and Control Strategy of Payload Motion for Deployment System
Authors: Fang Zi Fan , Xiang Bing Fei , He Qing Song , Wu De Xin , Xiao Hua Pan
Published: November 2012

The dynamic model of wire rope with contact is presented based on finite element method and the flexible multi-body dynamics theory by putting the contact force between the wire rope and drum. The unilateral anti-sway and tension control strategy is put forward, and the dynamic model and collaborative simulation of payload motion for deployment system is modeled by dynamic analysis software RecurDyn and control library Colink. The correctness of the collaborative simulation model and control strategy is validated by analysis and comparison , which lays the foundation for further research on dynamic simulation of virtual prototype in nonlinear and complex mechanical-control system.
Effect of ZnO Nanoseed Structure on the Growth Orientation of Vertical Array ZnO Nanorods via Hydrothermal Process
Authors: Tan Sin Tee , Umar Akrajas Ali , Yahaya Muhammad , Yap Chi Chin , Salleh Muhamad Mat
Published: November 2012

This paper reports a study of the effect of ZnO nanoseed structure on the growth orientation of ZnO nanorods prepared using a seed-mediated hydrothermal process. In this work, we prepared vertical align ZnO nanorods by a two-step process namely seeding and growth process. ZnO nanoseed on a silicon oxide (SiO2) coated silicon (Si) substrate was deposited by rf- sputtering under argon gas atmosphere at room temperature (ca. 25 ºC). The samples were annealed in air at 500 °C for both different annealing times namely 1 and 2 h to obtain nanoseed with varies structure and crystallinity. The ZnO nanorods were then grown from the nanoseed via a hydrothermal process in a growth solution that contained equimolar of zinc nitrate hexahydrate and hexamethylenetetramine (HMT) at 70 °C for 4 h. It was found that the durations of annealing treatment on the nanoseed indicated an effective modification on the crystal growth orientation of the nanorods, which preferred well-aligned orientation for shorter annealing time and random growth for longer annealing time. These results should find potential use for manipulating the nanostructure growth of ZnO for applied in current existing application.
Design Research on Low Speed and Overloaded Transmission System Based on Design Principle of Reverse Transformation
Authors: Lu Xiu Chun , Xu Jia Wei , Liu Cai Jun , Jin He Rong , Qu Ji Fang
Published: November 2012

As a typical large rotary dual-drive device, three-car dumper is an essential and important equipment of raw materials storage and transport in the power, chemical industry, metallurgy, ports and other industries. It has some characters such as massive structure, heavy bearer, low-frequency running, frequent starting and braking and mechanical center of gravity which often shifts. The low-speed drive system has some working characteristics such as heavy loads, heavy shocks, low speed, poor working conditions, often breaking teeth and so on, so we propose a reverse design method for low-speed overloaded open gears through using design principles of reverse transformation. By using product reverse technology, we make the parameter design of low-speed and overloaded open gear pairs of Delafu dumper localization, so it extends the service life of gear pair and parts replacement period.
Recent Development of Stacked Injection Molding
Authors: Gao Jun , Fei Gu Ren , Zhang Ping , Huang Jun , Xu Li Li
Published: November 2012

In this paper, the application range and the characteristics of the stacked injection molding were introduced. The latest development and present application of the stacked injection molding were also presented. Furthermore, the routine problems of the stacked mold during the injection molding process are analyzed, and some improvements of the stacked mold structure are proposed.
Wet-Etching Characteristics of ‹111› Orientated Silicon and its Application
Authors: Yu Hui Yang , Qin Ming
Published: November 2012

In this paper, a method of fabricating single crystal silicon microstructures on oriented silicon wafer is developed. The relationship of the (111) planes on silicon silicon wafer is analyzed based on the crystal lattice of the silicon, the method of judging these (111) planes is given. An anisotropy wet-etching experiment is done to verify the etching characteristics of silicon. The process of fabricating three dimension structures on silicon wafer is then given out and some basic MEMS structures such as cantilever beams, doubly-clamped beams are fabricated. With this method, it is easy to define the shape and thickness of the microstructure and the process is not complicate. Moreover, the structures made in this way have higher structural precision and mechanical strength.
Post-Growth Annealing of (Ga, Mn)As under Sb Capping
Authors: Ulfat I. , Adell J. , Pal P. , Sadowski J. , Ilver L. , Kanski J.
Published: November 2012

(Ga,Mn)As is a model diluted ferromagnet system in which the atomic spins of Mn ions are ferromagnetically arranged due to the exchange interaction with valence band holes. An important tecchnological concern regarding this system has been approaches that might result in reduction of the density of Mn interstitial and increase in the content of Mn in order to make the system practically feasible. To accomplish the objective we report the results of our recent synchrotron radiation based spectroscopic investigations concening annealing induced modification of as-grown (Ga,Mn)As layers covered with Sb capping.
Multilayer Masking Technique for Deep Isotropic Silicon Wet Etching
Authors: Nie Lei , Yu Jun Xing , Zhang Kun
Published: November 2012

A multilayer masking technique was presented aiming at the requirements of deep isotropic silicon wet etching. Because the processing time of deep etching is relatively long and etching rate is high, it is very hard to achieve satisfying etching result by using conventional photoresist or metal single layer mask. Thus multilayer mask consisting of photoresist and metal layers is fabricated to exert respective advantages and avoid disadvantages. Based on its excellent chemical and thermal stabilities and high viscosity, Su-8 was selected as the material of photoresist layer. The metal layer was fabricated by chromium because it could alleviate the undercut problem in great extent. Results of etching experiment indicated that no obvious defect of pinhole or crack was found on this multilayer mask after etching to the depth of about 300μm. Thus it is undoubted this masking technology is capable for deep silicon wet etching.
Coal Particles Cleanout Technology in Coal Bed Methane Wells
Authors: Liu Bing , Qi Yao Guang , Wang Chao , Xu Chun Cheng , Zhang Fen Na , Han Jun , Xiong Xian Yue
Published: November 2012

Coal particles cleanout which is regarded as the key technology in the operation of coal bed methane (CBM) wells, play an important part in making steady production. In oil wells, Sand cleanout is operated by circulating a liquid or a multiphase fluid into the wellbore to bring sand particles to the surface. Although the sand cleanout operations have been applied successfully in most wells with high efficiency and negligible leakage, it would leak working fluid into coal bed formation, destroy the structure of coal bed and jam the formed channel of gas production. In this paper, a new continuous vacuum cleanout technology has been developed to effectively remove coal particles in CBM wells by employing a jet pump. The Concentric Tubing String (CTS) which is assembled by 3.5 inch tubing and 1.5 inch tubing is also introduced in, because there is no CCT technology in China at the moment. Detailed structure and principle of the coal particles cleanout technology system are described, while a theoretical model is formulated to optimally design the system based on the coal particles settling experimental data and jet pumping theory. It has been shown from field applications that the coal particles cleanout technology makes significant improvements in achieving high efficiency and preventing leakage in CBM wells. Moreover, the new technology reduces the skin damage and increase the production compared to non-vacuum CBM wells.
Machine Slideway Wear to the Precision of the Whole Machine Impact
Authors: Yang Lin , Wang Jin Yuan , Wu Rui Nan , Wu Wei
Published: November 2012

This paper studies the influence of machine slideway precision on the overall accuracy of machine tools, and puts forward the root causes of the decline in accuracy of machine tool guide is rail wear, the decline of rail accuracy will impact on the adjacent unit cell, thus decline the accuracy of the machined parts; Finally takes floor-type milling & boring machine as research object, bases on geometric error models of the theory of multi-body system to describe the spindle box rail wear trends and establish relationship between the spindle box rail wear and the machine precision.
Numerical Predictions and Verifications for Hydrodynamic Performance of Bidirectional Tidal Stream Turbine
Authors: Guo Bin , Wang Da Zheng , Zhou Jun Wei
Published: November 2012

In this paper, the tidal stream turbine blade is designed by using blade element momentum (BEM) theory. The bidirectional airfoil is created derived from NACA airfoil. Ansys-CFX is used to predict the hydrodynamic performance of this bidirectional airfoil, and it turns out that the bidirectional airfoil works well at both of the tidal current directions. A test turbine named rotor 2 is used, and a comparison is made between experimental results of the test turbine and numerical prediction results to prove the correctness of the numerical method. The power coefficient of bidirectional tidal stream turbine obtained by CFD method is 39.36% at the design tip speed ratio.
Pump Concrete Construction Technology
Authors: Sun Li Gong
Published: November 2012

In recent years, pump concrete construction technology is widely put in use because the modern architecture trends to over- height, large- span, and over-load. In the basis of the railway engineering examples, the thesis elaborates the ratio design of high-strength pump concrete, construction technology and quality control with reference to projects of the same kind.
E-Manufacturing Challenges and Enablers
Authors: Hosseini Seyed Ali , Nosratabadi Amin , Okhovat Mohammad Amin , Nehzati Taravatsadat , Ismail Napsiah Binti
Published: November 2012

This paper discusses about unprecedented challenges in consequence of globalization and competitive market conditions which manufacturing industries have to face with. Besides changing environmental regulation and social and regional demand, these challenges, will introduce e-manufacturing concept to deal with the recent needs. Manufacturers become more agile and nimble by development of internet. On one hand, it affects differently on the sections of process industries. On the other hand, it makes more demand for products and more opportunities to sell and market the products. To support this new concept, E-Manufacturing enablers will be introduced and finally, developments for next generation are discussed.
Technical Measures on Decreasing Harm to Slope Stability in Chamber Blasting
Authors: Duan Bao Fu , Li Lei , Li Hong Chun , Wu Hui
Published: November 2012

The harm to slope stability caused by blasting is a potential problem in construction of highway, railway, mine and other engineering. Compared with other blasting technology, the harm to slope stability caused by chamber blasting is often much serious. So, more and more people begin realize and investigate it. On the basis of blasting theory and practice, several technical measures on decreasing harm to slope stability in chamber blasting are put forward.
A Similarity Measure between Fuzzy Sets
Authors: Zheng Gao
Published: November 2012

The similarity measure is one of the most useful fuzzy measures in fuzzy logic theory. In this paper, we propose a new similarity measure between fuzzy sets. As a preparation, we first choose an axiomatic definition for the similarity measure. Then, according to the chosen axiomatic definition, we propose a new computation formula. Finally, we give two examples to validate its performance. The results show that the new similarity measure is rational for fuzzy sets.
An Inclusion Measure of Fuzzy Sets and its Properties
Authors: Wang Jing , Chen Zhong Wei
Published: November 2012

The inclusion measure between two fuzzy sets can promote fuzzy logic methods to play their full roles and has been widely used in numerous areas. In this paper, we propose a new inclusion measure of fuzzy sets. At first, we select an axiomatic definition included three axioms. Then, we give a computation formula under the constraint of three axioms, and discuss two properties of the new measure. At last, two examples are given to verify its performance. The results show that the proposed inclusion measure is reliable and rational for fuzzy sets.
Change of Landscape Pattern and its Impact in the Distribution Region of Tetraena mongolica Maxim.
Authors: Zhen Jiang Hong
Published: November 2012

Using the technology of remote sensing, geographical information system, global positioning system and the analysis software of landscape pattern, the paper analyzed 4 sensing images of Tetraena mongolica distribution area in different periods. The dynamic changes of landscape composition and landscape patterns and its impact on the ecological environment was analyzed and discussed. The results showed that the landscape composition in study area has been changed largely and T.mongolica population area has been reduced while the area of farmland, town and industry land, desertification land and else vegetations have been increased. On landscape scale, diversity index increased while dominance index dropped year after year. It indicated that the landscape pattern tend to be fragmented and heterogeneity. It has resulted in the landscape stability and anti-interference ability declined, bring about region ecological environment security questions such as land degradation, environment pollution and biodiversity loss.
Effect of Micron Size Ni Particle Addition on Microstructure, Thermal and Mechanical Properties of Sn-9Zn Lead-Free Solder Alloy
Authors: Billah M. Muktadir , Shorowordi Kazi Mohammad
Published: November 2012

This study had been carried out to investigate the effect of micron size Ni particle addition on the microstructure, melting behavior and mechanical properties of the ternary Sn-9Zn solder alloys. Different weight percentage, viz. 0.25, 0.5 and 1 of micron size Ni particle was added in the liquid Sn-9Zn alloy and then cast into the metal mold. Melting behavior was studied by Differential Thermal Analyzer (DTA). Microstructural investigation was conducted using Optical and Scanning Electron Microscope (SEM). Tensile properties were determined at a strain rate 3.00 mm.min-1. The results indicated that Ni addition increased both the melting point and solidification range of the Sn-9Zn solder alloy. The microstructures of newly developed ternary Sn-9Zn-xNi solder alloys consisted of fine needle-like α-Zn phase dispersed in the β-Sn matrix. It was found that small amount of Ni (0.25 wt. %) addition refined and dispersed the Zn needles throughout the matrix. Besides, enhanced precipitation of Zn in the β-Sn matrix was also observed. All these structural changes increased the hardness and tensile strength of Sn-9Zn alloy with the addition of Ni particle to a certain amount.
The Analysis on the Tectonic Subsidence of Linnan Sag Located in Huimin Sag during the Depositional Stage of Es4
Authors: Sun Qi , Shi Long Qing , Chen Shan , Xu Dong Jing , Qiu Mei
Published: November 2012

On the basis of back-stripping analysis of 30 wells in Linnan sag，in this paper we calculate the tectonic subsidence as well as the total subsidence about the upper and lower sub-section of Es4 in Linnan sag, then we obtain the graph of the tectonic subsidence and analyze the tectonic subsidence history of Es4, and get a result of the basin’s geological structure moments strength and the tectonic geology, as well as the degree of development of the basin in order to know more about the tectonic history and the law of hydrocarbon accumulation in this area.
Self-Assembly Nanofabrication via Mussel-Inspired Interfacial Engineering
Authors: Choi Young Joo , Jin Hyeong Min , Kim Bong Hoon , Kim Ju Young , Kim Sang Ouk
Published: November 2012

We present that polydopamineassistedinterfacial engineering can be synergistically integratedwith block copolymer lithography for surface nanopatterningof low-surface-energy substrate materials, includingTeflon, graphene, and gold. Block copolymer lithography is aself-assembly based nanofabrication that holds greatpromise for sub-10-nm scale patterning. The directed self-assemblyof block copolymers into device-oriented nanopatternsgenerally requires organic modification of a substrate surface.In this work, the versatility of the polydopamine treatment was demonstrated by the surface modification.
The Application of BIM Model in M/E/P Construction Coordination
Authors: Chen Yi Jao , Feng Chung Wei , Lee Kung Wen
Published: November 2012

The M/E/P (Mechanical, Electrical, and Plumbing) system of the building project has become more and more complex as the demand of the better living environment within the modern buildings increases. However, since the complexity and uniqueness involved within MEP trades, various fields of designers or contractors can hardly share their information with each other. This study employs BIM (Building Information Modeling) technology to assist the stakeholders of the construction projects to share and exchange information according to their needs. First, the process of different MEP disciplines will be systematically analyzed. Then the possible conflicts between trades will be identified. According to the study, necessary and important attributes required for the MEP BIM objects will be developed. Those developed BIM objects will later serve as the core of the communication platform, on which the project participants can easily access and share information. In addition, a better information integration mechanism for MEP systems will be developed throughout different phases of the project life cycle.
Case-Based Expert System to Support Electronics Design in Mechatronic System
Authors: El-Nakla Samir
Published: November 2012

Many current systems rely for their performance on achieving a balance between electronics, software and mechanical systems and the transfer of functionality between those domains. The design of such mechatronic systems therefore relies on the ability of the individual domain specialists to transfer knowledge about their domain within the overall design process. Enhancing the ability of non-specialists to understand the relationships between the various system elements and to communicate with the domain specialists will serve to enhance and support the design process. The paper therefore considers a tool based around the use of case-based expert system which is intended to provide such support by allowing a non-specialist to access information from a range of domains in a way which is easy to use and understand and which will establish and define the links between the various areas of technology.
Effect of Strain Rate Upsetting Process on Mechanical Behaviour of Epoxy Polymer
Authors: Koloor S.S.R. , Abdi Behzad , Abdullah M.R. , Amran Ayob , Yahya Mohd Yazid Bin
Published: November 2012

The advantages of polymer materials such as high strength and stiffness to weight ratio, corrosion resistance and manufacturing flexibility have increased the industry demands to utilize them in high performance applications. Designing polymer structures depends on a high understanding of their hyper-elastic behaviour, therefore investigating the mechanical behaviour of polymers is necessary. In this paper, the nonlinear behaviour of epoxy polymer is examined under upsetting test. The main aim of the study is to analyse the effect of strain rate on the mechanical behaviour of epoxy polymer. The cylindrical polymer epoxy specimen, 20mm in length and in diameter, was manufactured. The upsetting tests provided quasi-static compressive loads which were adjusted in the loading rates of 0.1, 1, 50, 100, 200 and 500 mm/min. The loadings were continued until complete fracture was observed. Each loading rate was repeated for at least 3 specimens to ensure a reasonably good statistical sampling. The average data of each test is used to produce the load-displacement graphs of the specimens, from which stress-strain curves are extracted to show the behaviour of epoxy polymer. The results show a 37% increase of yield stresses when the loading rate is increased from 0.1 to 500 mm/min and the yield strains increase by 26%. The stress-strain curves are nonlinear where the slope increases when the loading rate is raised from 0.1 to 100 mm/min but then decreases when the rate is further raised from 100 to 500 mm/min. The maximum load that can be sustained is increased with loading rate. This can be due to the microstructure deformation response of epoxy polymer. This polymer is categorised as large-strain material by showing exhibiting large deformations under different rates of compression loading.
A New Method of Eliminating Outliers in Data Processing of Tracked Vehicle Vibration Signal
Authors: Lv Wei Wei , Gu Liang , Huang Xue Tao , Jiang Hong
Published: November 2012

The existence of outliers can produce false harmonic frequency components in data processing for vibration signal of tracked vehicle.The paper uses the Wright standards to judge details coefficients of outliers and calculates new details coefficients to replace the ones of the outliers by weighted coefficient method.The signal can be reconstructed with new details coefficients .The results show that the new method can retain the maximum information of singal after eliminating the outliers , meet the data distribution and reduce variance.
1.25MW Wind Turbine Vibration Performance Study of the Internal Cabin
Authors: Yang Fei , Yu Chang Hai , Dong Jie Liang
Published: November 2012

The article introduces the vibrating test of gear box in the engineroom of 1.25MW wind turbine in wind farm in Inner Mongolia province, and obtains the detailed structure form and parameters of the wind turbine, and has real-time monitoring on four wind turbines of four typical areas in the wind farm, and gets time domain response of wind turbine. The on-line condition monitoring was applied on full power test platform that uses 1.25MW wind turbine, vibrating test was used for key parts in the engineroom of wind turbine, spindle, gearbox, generator ,generator underframe and so on, and the natural frequency of generator underframe and time and frequency domain response of gearbox, ring gear, generator and generator underframe are obtained. Through two tests, the vibration characteristic in the engineroom is obtained.
Finite Element Analysis of the Pump Rigidity
Authors: Ma Guang Ying , Yao Wang , Gao Jun , Wang Peng , Wang Jia Bin
Published: November 2012

In this paper, the finite element software was used to analyze the rigidity of the pump body and the rotor shaft, in order to provide some useful information for the optimal design of pump. The analysis result shows that the rigidity of the pump body model is adequate, but the rotor shaft displacement is a little large, which should be modified. Nomenclature F Centrifugal force of the impeller [N] m Quality of the impeller [kg] w Rotational speed of the impellor [r/min] r Effective radius of the impeller [m] F1 Force on one bearing block [N] M Bending moment on one bearing block [N*m]
Overview of the Diagnostic Methods of Engineering Components Damage Based on Modal Analysis
Authors: Sun Hong Chun , You Yuan Cheng
Published: November 2012

This article describes the history of the development of structural damage, and an overview of current research status at home and abroad based on modal analysis of structural damage identification, reviewed in recent years the structure of the early damage recognition technology, from the application point of view of definition of indicators and indicators on the current some indicators of a comprehensive analysis and evaluation, further analysis of the feasibility of several modes of indicators to identify structural damage diagnosis, pointing out that the modal parameters of structural indicators to the validity and accuracy of damage identification and the need to further address the problem. The research will provide a reference for the application of modal analysis method to detect structural damage diagnosis in order to ensure early discovered the damage and accurately identify the site of injury repair in a timely manner.
Analysis of Solid-Liquid Two-Phase Flow in Axial Flow Pump
Authors: Hua Hong , Wang Xiao Lin , Wang Hui Yan , Liu Xiao Bing
Published: November 2012

The liquid-solid two-phase turbulent flow in an axial flow pump was numerically simulated by using the SIMPLEC algorithm based Navier-Stoker and RNG k-ε turbulent model and after the secondary development of the software Fluent. The distributions of solid concentration, velocity and pressure on the impellers of the axial flow pump were analyzed at different volume concentrations at the pump inlet. The numerical results show that the head and the efficiency of the pump will reduce with the increasing of the sediment concentration in sandy rivers. This research shows that the numerical simulation results are consistent with the actual situations.
Study on Radial Load in a Centrifugal Pump with Slope Volute Using CFD
Authors: Zhang Ning , Yang Min Guan , Gao Bo , Li Zhong
Published: November 2012

Unsteady flow field in a centrifugal pump causes significant radial load on the impeller leading to the vibration in consequence. In order to reduce radial load, a special slope volute was proposed. The full 3D-URANS equations were solved for several flow rates between 60%~150% of rated conditions. The magnitude of average radial load was estimated by empirical formula. It was found that the numerical results agree with the results obtaining from empirical formula quite well. When adopting slope volute, the radial load on the impeller is much smaller compared with conventional spiral volute. So it is convinced that the radial load can be reduced significantly when using slope volute.
Available Heat Energy Analysis from Exhaust of Incinerator on Ship
Authors: Liu Xin Jian , Kong Xiu Hua , Ren Wei
Published: November 2012

Incinerator is an important prevent pollution equipment on ship, usually it is used to deal with some combustible rubbish, such as waste food waste, oil dishcloth, especially dirty oil and oil sludge. Through analyze the quantity of dirty oil and oil sludge that produced on ship, and calculate the exhaust gas heat energy that can be used from incinerator, the exhaust gas heat energy has plenty of energy from incinerator, it should be utilized and it will be a new way that to improve ship energy utilization efficiency.
Research on the Influence Factors of Cavitating Jet in Jet Pipe Amplifier Nozzle
Authors: Wang Xin Hua , Li Zhi Jie , Sun Shu Wen , Zheng Gang
Published: November 2012

The cavitation flow characteristics in jet pipe amplifier with different nozzles were simulated using commercial computational fluid dynamics (CFD) software. The influence of operating parameters and structural parameters of jet nozzles on cavitation jets are the key objective. These parameters mainly include inlet pressure, outlet pressure, temperature of water, nozzle convergence angle, the length of the nozzle cylindrical section, nozzle diameter and nozzle export chamfer angle. The results provide methods to limit the emergence and development of the nozzle jet internal cavitations.
An Improved Shear Stress Transport(SST) Model for High Speed Flows
Authors: Liu Jing Yuan , Cheng Wen Qiang
Published: November 2012

An improved Shear Stress Transport(SST) model, which allows for the compressible corrections, is proposed in this study. Numerical scheme was established by taking advantage of the improved Total Variation Diminishing (TVD) scheme and by applying implicit scheme to the negative source terms of the turbulence model. Hypersonic flat-plate boundary-layer flows and hypersonic compression ramp flows marked with separation, reattachment and shock/boundary-layer interactions are then computed. The comparisons between the computational results, the experimental results and the semi-empirical formulations show that the compressible correction term of the SST turbulence model is the scalar product of the weighted density average of the turbulent fluctuating velocity and the pressure gradients of the average flow field correlation quantities. In addition, for flow with separation and without separation, calculation results of wall pressures, friction coefficients and wall heat transfer rate distributions using the improved model and established scheme agree better with the experimental results than that using the original SST model.
Research on Spiral Motion of Guided Projectiles Based on Flight Data
Authors: Zhang Shuang Biao , Li Xing Cheng , Su Zhong , Zhao Liang Yu
Published: November 2012

To investigate the realistic spiral motion of a spinning guided projectile, a novel analysis method based on flight data is proposed and further applied. A mathematical model of spiral motion is derived in body coordinate system firstly, and the procedures of the novel method are then described in detail. The spiral motion can be induced by non-zero velocity and rotation rate along the longitudinal axis with at least one non-zero velocity and rotation rate along transverse axes. In the case of non-zero velocities and rotation rates exerted along triple axes, it is observed that the spiral motion consists of single circular motion and double circular motion, and the spiral motion depends on both spinning rate and attitude angles of flight trajectory.