bluuebunny/crossref_metadata_2025 huggingface dataset:
Reaction Wheel Disturbance Characterization by Analysis of Micro-Vibration Measurements
Authors: Liebold Florian , Wiegand Stephan , Käso Ronny
Published: November 2012

Structural stability of satellites is of vital significance for the operation of sophisticated payload systems. Therefore manufacturers of satellite components, such as reaction wheels, make huge efforts to assure the convenient vibration behavior of their products. To meet that demand a device for the detection of mechanical oscillations with very small amplitudes was developed. The described micro-vibration test-bench allows the detection of vibrations with amplitudes > 10 5 Newton in a frequency range of < 20 kHz generated by a test item with a mass up to 30 kg. The quality of the thereby obtained data makes it possible to identify the sources of the observed vibration. The high information content of the measurements originates from a set of high resolution force sensors, variably arranged on a mechanically isolated platform. The sensitivity of the used equipment (charge cables, charge amplifiers and signal analyzers) and its resistance to ambient disturbances allow the high accuracy of the measurement as mentioned above. The described micro-vibration test-bench additionally provides opportunity to detect production errors non-destructively and helps to reduce the inherent noise of the item under test. It therefore represents a reliable measurement device to quantify and assess detrimental vibrations.
Model Predict Vibration and Noise of Disc Brake
Authors: Huynh Le Hong Thai , Dittrich Aleš , Dráb Ondřej
Published: November 2012

The problem brake squeal is one of the important areas of application in the automotive industry. Most brake squeal is produced by vibration (resonance instability) of the brake components, especially the pads and discs are known as force-coupled excitation. Until now have many research about predict vibration and noise of disc brake but unfortunate the results is not satisfied. This paper presents model for prediction stability of disc brake for a model four degrees of freedom. The result shows stability of system and when occurrence brake squeal.
Detailed Investigation of Detached-Eddy Simulation for the Flow Past a Circular Cylinder at Re=3900
Authors: Zhao Rui , Yan Chao
Published: November 2012

The flow past a circular cylinder at a subcritical Reynolds number 3900 was simulated by the method of detached-eddy simulation (DES). The objective of this present work is not to investigate the physical phenomena of the flow but to study modeling as well as numerical aspects which influence the quality of DES solutions in detail. Firstly, four typical spanwise lengths are chosen and the results are systematically compared. The trend of DES results along the span increment is different from previous large-eddy simulation (LES) investigation. A wider spanwise length does not necessary improve the results. Then, the influence of mesh resolution is studied and found that both too coarse and over refined grids will deteriorate the performance of DES. Finally, different orders of numerical schemes are applied in the inviscid fluxes and the viscous terms. The discrepancies among different schemes are found tiny. However, the instantaneous flow structures produced by 5th order WENO with 4th order central differencing scheme are more abundant than the others. That is, for the time-averaged quantities, the second-order accurate schemes are effective enough, whereas the higher-order accurate methods are needed to resolve the transient characteristics of the flow.
Hardware-in-the-Loop Simulation and Flight Experimentation of the Control System on a Small Solid Rocket
Authors: Huang Wen Bo , Zhang Yin Hui , Jiang Zhen Yu , Zhang Wei Hua
Published: November 2012

By using the Perturbation Theory and solidification coefficient method, based on the interpolation parameters for optimal control feedback matrix, the design of optimal roll control system for a small solid rocket is achieved. The hardware-in-the-loop simulation platform built with DSPACE real-time simulator and high-precision three axis turntable is designed to validate the optimal control law. As for no feedback device of the steering gear, the radios are used to transfer the signals between the devices in the closed loop simulation system. Finally, through the flight-testing, the results confirm a good stability of the roll control system and the high reliability of the hardware-in-the-loop simulation platform.
Modelling Aerodynamics Unsteady Loads on the Horizontal Tail Plane of a Civil Aircraft
Authors: Calderon Raul , Aupoix Bertrand , Calmels Benoit , David Christophe
Published: November 2012

During flight, emergency descent situations are part of those extreme conditions that can lead the empennage of an aircraft to vibrate. These vibrations are mainly due to the separated flow on the upper surface of the structure which increases the pressure fluctuations on the empennage, sometimes leading to buffeting. This situation can cause structural fatigue and can induce certification and design constraints on the structure. Hence, an accurate prediction of the unsteady loads is needed to take these forces into account in the early phase of the empennage design. This paper presents a new approach to accurately model the unsteady aerodynamic loads resulting from the interaction between the horizontal tail plane and the wing wake. The method is based upon the coherence method and is compared to the method developed by Soumillon [2], based upon the correlation method. The results obtained by this new model show good agreements with the experimental data.
Algebraic Modeling for Dynamic Gates in Dynamic Fault Trees
Authors: Wang Bo , Li Yi , Xing Wei Yan , Liu Dong
Published: November 2012

This paper proposed a novel algebraic framework for modeling dynamic gates in dynamic fault trees (DFTs). The algebraic modeling of DFTs tries to avoid the ambiguities and inconsistencies of the natural languages-based original definitions. Aim to solve this issue, preliminarily a formal framework is defined, including the definitions, properties, rules and theorems. Then, under the framework, algebraic approaches and automatic conversion algorithms for any form of dynamic gates are developed. Finally, an instance verifies the validity of the approaches. Algebraic modeling helps to build the more rigorous mathematical theoretical systems of DFTs. Meanwhile, automatic conversion algorithms are conducive to effective computer-aided modeling for DFTs.
Quality Prediction in Complex Industrial Process with Support Vector Machine and Genetic Algorithm Optimization: A Case Study
Authors: Yang Jian Guo , Lu Zhi Jun , Li Bei Zhi
Published: November 2012

The yarn production is a complex industrial process, and the relation between the spinning variables and the yarn properties has not been established conclusively so far. The SVM regression algorithms are briefly introduced in this study, and then SVM models for predicting yarn properties have been presented. Model selection which amounts to search in hyper-parameter space is performed for study of suitable parameters with Genetic Algorithms. The yarn experimental results indicate that GA- SVM models are capable of remaining the stability of predictive accuracy, and more suitable for noisy and dynamic industrial process.
Detection of Mechanical Defects by Neural Networks “Experimental Analysis”
Authors: Bélaid Bouzouane , Hamzaoui Nacer
Published: November 2012

Various methods are implemented to identify the nature of a defect on a rotating machine, by using vibratory measures; they differ in their precision, simplicity of implementation and their sensitivity to errors measurement. The identification of several defects combination is still difficult to implement by conventional signal processing, as the vibration signal that emerges is disturbed, thus making any identification so hard. In this study, we proposed a method based on the neural networks to identify one defect or several combinations of mechanical defects. Thus we propose the neuronal method: the Radial Basis Function (RBF). We highlight their capacity to detect the defect and their sensibility with regard to a signal noise characterizing the other independent sources to the defects. This evaluation will be done with measurement will be carried out on a housing bearing and test bench made up of a toothed gearing on two floors, and without lubrication. Some provoked defects will be analyzed in this study.
Dynamic Response Analysis of a SRM Incorporating Frequency-Dependent Modulus Using Iterative Approach
Authors: Muhammad Adnan , Sun Bing , Zhang Jian Wei , Kamarinchev Dimitar
Published: November 2012

Mode-based, dynamic analysis of a Solid Rocket Motor (SRM), during transportation, is performed, while considering frequency-dependent modulus of viscoelastic materials. The modulus of viscoelastic materials depends on vibration frequency, which however cannot be modified during the mode-based response analysis. An iterative approach is proposed, to extract mode-based stress response of a SRM. The material modulus used to get response, is based on frequency that is the same as the motor’s eigenfrequency. In order to do modal summation of mode responses, two methods are used in the analysis. Results show that in both the Eigenfrequency extraction and in the subsequent stress response analysis, the used material evaluation frequency is in complete agreement with the eigenfrequency.
Effective Mechanical Properties for Composites with Three-Phase Randomly Distributed Aggregates Predicted by Multi-Step Mori-Tanaka Method
Authors: Luo Dong Mei , Wang Wen Xue , Chen Qiu Yan , Yang Hong , Zhou Ying Long , Li Bang Ding
Published: November 2012

Multi-step Mori-Tanaka method (MMT) is applied to the estimation of the effective mechanical properties for composites with three-phase randomly distributed aggregates in this paper. The Multi-phase Homogenization Theory (MHT) which is based on mathematical homogenization method and is employed to verify the results of MMT method. Results show that MMT method is reasonable and practicable to predict the effective mechanical properties of composites with several phases, and the Young’s moduli and Poisson’s ratios of each phase may have some effects on the effective mechanical properties of multi-phase composites.
The Interior Ballistic Research for Gas-Steam Launching System with Water Injection in Block
Authors: Bai Jun Hua , Hu Chun Bo , Li Jia Ming
Published: November 2012

Gas-steam launching system with water injection in block can overcome the problem of horizontal or large-angle launching, and gets more and more value in recent years. Based on the characteristic of launching system, the model was built with several assumptions, which could provide reference and technique for developing the new launching system. And the generator result was verified by the experimental one. The interior ballistic characteristics were researched by calculation result under different deep and injection water mass conditions. The comparison of the simulation results and theory analysis indicates the model was rational and valid, and different launching deep and cooling water mass had effect on ballistics, more water can cool down the silo, but also brings more energy loss, and deeper launch needs more energy, so good design is required to fit the parameters demand in all respects.
Application and Research of Feedforward Control in Boiler Control of Supercritical Thermal Power Generating Unit
Authors: Li Jun , Li Wei Wei , Zhang De Kuan
Published: November 2012

The general information and features of supercritical unit are illustrated. According to the engineering application situation, by comparing two feedforward methods, the new method application effect than classic control method, the response of unit’s load is much faster than before. It’s benefit to Automatic Generation Control (AGC). It’s hoped that the analysis and optimization can provide useful experience and lessons for the design of the supercritical boiler control to some extent.
Hex Turbofan Engine
Authors: Mahesh Sarnavi , Prakash Pate Sweety
Published: November 2012

Looking into the future of aviation for commercial aircrafts there are various viable options for engine and associated propulsion technologies. The team had to eliminate some of the possible solutions. Superconducting electric motors were alleviated considering weight factors and lack of technology readiness to fly long range commercial jets. Even prop-fans were eliminated considering its limitation on stalling speed of fan and higher noise levels. To avoid such problems we went ahead with an integrated Turbofan engine.
Experimental Study on the Laminar Cooling Process of the Middle and Heavy Plate
Authors: Wang Min Ting , Li Xue Tong , Du Feng Shan
Published: November 2012

To investigate the effect of laminar cooling parameters on temperature field and heat transfer coefficient, an experiment platform for analyzing laminar cooling is designed and made by the author. Making use of the equipment, the cooling experiments with the various cooling conditions have been carried. Based on the experimental results, the effects of different water flows and water temperature on cooling rate are presented in this study. And it can be found that adding impurities into cooling medium is an effective way to improving the cooling rate. The research achievements have a certain reference value for setting parameters in laminar cooling process of heavy plate.
Microbial Fuel Cell for Sustainable Electricity Production from Seafood Wastewater
Authors: Sun Hong Liang , Lv Hong Bin , Nie Wen Jing
Published: November 2012

To make the treatment of seafood wastewater more economical and sustainable, this study aims to examine electricity generation from seafood wastewater in MFC reactor. By supplying the MFCs with seafood wastewater, the maximum power density of 291.6 mW/m2 and CE of 20.3 % could be obtained. The substrate loss was attributed to diffusion of molecular oxygen from the cathode to the anode, which led to substrate conversion through aerobic respiration rather than electricity-producing pathway. This study provides a conceptual demonstration of seafood wastewater for electricity production using MFC technology.
Research on Vehicle Longitudinal Following Control Modeling and Collaborative Simulation
Authors: Zhang Lun , Zhu Yun Yun , Cao Kai Xiang
Published: November 2012

The vehicle longitudinal following control system has been widely used in several intelligent-vehicle applications as a kind of assist automatic driving system. On basic of general introduction and analysis of existing vehicle dynamics models, the paper choose vehicle power train model as an example to show the choice of control system structure and PID control strategy, and then researched the collaborative simulation based on driver safety distance model and entire vehicle following model for freeway. So we got an adaptive safety distance through Matlab/Simulink, which distance error is less than 0.01m. At the end, this paper putted forward prospect of vehicle assist automatic driving system.
Analysis of All Terrain Vehicle (ATV) for Impact Loading and Roll over Considering the Safety of Occupants
Authors: Naiju C.D. , Annamalai K. , Bevin Babu , Nikhil Prakash
Published: November 2012

All-terrain vehicles (ATV) are achieving wider response and significance in the present world. With their characteristic abilities of getting through any terrain along with their simple and compact structure, they rule the off-roading world. A new field of engineering research has been developed because of the increasing number of ATV accidents. For determining the reasons to how so many crashes occurs and how they can be prevented, a series of ATV tests were conducted. The tests included simulating an ATV for frontal impact, side impact and rolling over with added weight of a passenger, and due to a thrust effect. Through testing, the amount of weight needed to flip an ATV was determined. This paper highlights the ways to analyse the safety of its chassis in case of impacts or roll overs.
Structural Damage Detection of Jointed Frame Structures Using Chaotic Excitation and Attractor Analysis
Authors: Wu Bin , Zheng Yang , Qiu Qun Hai , Xu Chao
Published: November 2012

Engineering assembly structures will suffer joint damage inevitably under environmental loads, which may affect the integrity and functionality of structures, even cause the catastrophic event. In the paper, a method using chaotic excitation and attractor geometrical property analysis to identify the joint damage is investigated. This method utilizes the property that different joint conditions will alter the filtered chaotic signal dimension. Damage features are extracted from reconstructed attractors and used to identify the joint condition. A new parameter based on the attractor local variance is tested as damage feature. An experimental jointed frame structures is designed and the joint damage are induced by varying the fastener preload. The results show that this approach works well for detecting the joint damage and the feature is monotonic varying with the damage increase.
A New Modified Back-Propagation Algorithm for Forecasting Malaysian Housing Demand
Authors: Nawi Nazri Mohd , Hamid Noorhamreeza Abdul , Zainun Noor Yasmin
Published: November 2012

Over the past decade, the growth of the housing construction in Malaysia has been increase dramatically and the level of urbanization process in Malaysia is considered to be important in planning for low-cost housing needs. Unfortunately, there is a clear miss-match between the supply and the demand of low cost housing in Malaysia. Due to the problems faced, there have been several attempts in predicting housing demands using the artificial-neural networks (ANN) technique particularly back-propagation (BP). However, the training process of BP can result in slow convergence or even network paralysis and can easily get stuck at local minima. This paper presents a new approach to improve the training efficiency of BP algorithms to forecast low-cost housing demand in one of the states in Peninsular Malaysia. The proposed algorithm (BPM/AG) adaptively modifies the gradient based search direction by introducing the value of gain parameter in the activation function. The results show that the proposed algorithm significantly improves the learning process with more than 31% faster in term of CPU time and number of epochs as compared to the traditional approach. The proposed algorithm can forecast low-cost housing demand very well with 6.62% of MAPE value.
The Design of the Pilot Type Zero Steady-State Error of Water Hydraulic Overflow Valve
Authors: Zhang Li , Luo Jing , Yuan Rui Bo , Zhang Yi Bo
Published: November 2012

This paper studies on its cavitation and noise problem, according to traditional pressure controlling valve has a low accuracy of constant pressure, large leakage, poor lubrication, easy corrosion and so on, designs a new structure of pilot type of water hydraulic overflow valve based on the special physicochemical properties; Detecting the inlet pressure of the main valve with the help of the micro-pressure sensor and using closed-loop feedback control and dynamic pressure feedback control to eliminate steady-state error.
Simulation Analysis on Four Corners Leveling System of FRP Products Hydraulic Press
Authors: Yu Jin , Yan Qing Long , Huang Guo Qing , Li Jian Ping
Published: November 2012

The four corners leveling system of fiber reinforced plastic (FRP) press is the most central part. The quality of the processed products directly determined by the accuracy of the four corners leveling system. This article takes use of the EASY5 to model and simulate for the four corners leveling system of fiber reinforced plastic press. The simulation result shows that larger load results slower response and lower dynamic precision of the leveling and different original position of piston has little impact on leveling.
Co-Simulation of Mechanism-Hydraulics Working Device of Loader ZL-50 Based on ADAMS
Authors: Zhang Xue Hua , Xie Huang Sheng , Tang Qing Shun
Published: November 2012

The virtual prototype model of the loader’s working device based on the ADAMS is built to analyze the co-simulation. The analyzed results provide the principle for the design, and has wide application to the research of working device of loaders .This method can improve the capability of loaders effectively.
Research on the Expert System of Detection and Management for the Tire Wear of Straddle Type Monorail Vehicle
Authors: Liu Min , Gao Yue Hua
Published: November 2012

Based on the experiential data from the operation of Chongqing No.2 light rail for six years, and combined with the deep analysis for the tire wear characteristic of the straddle type monorail vehicle, this paper presents an expert system of detection and management for the tire wear of straddle type monorail vehicle. Firstly, this paper will analyze the wear characteristic of the straddle type monorail vehicle tire. Secondly, this paper will give the basic design idea of the expert system. And finally the design method of the expert system will be presented with the use of access software and visual basic language. Practices show that the expert system presented in this paper can meet the actual need of detection and management for the tire wear of the straddle type monorail vehicle, and is effective for reducing repair cost and increasing the economic benefit for operation of urban railway traffic.
Research on Optimal Cutting Parameters of High-Speed Hard Machining Based on the Principal Component Analysis and Taguchi Method
Authors: Cao Wen Hui , Liu Hong Bin , Wang Shen Song , Yang Ting
Published: November 2012

The optimization of the parameters in high-speed milling was analyzed based on the principal component analysis and the Taguchi method. The cutting speed, feed per tooth and cutting depth were selected as the cutting parameters while the cutting force, cutting power and surface roughness parameters were selected as quality characteristics. The optimum cutting parameters were obtained and the comprehensive quality of high - speed hard machining has been guaranteed.
Study on the Design of Corner Conveyor Driven by “V” Belt with Friction
Authors: Wang Xue Jun , Chi Yi Lin , Gao Li
Published: November 2012

Corner conveyor is widely applied in all kinds of automatic transmission line, and it is the most important members in the family of conveyors. To improve the product quality and the precision of the corner conveyors, in addition to control strictly the production techniques and monitor its manufacturing process, the most important is to improve the design level and the design efficiency. In this paper, a new type of the side of the V belt drive friction with friction type of new structure will be studied by using Solid Edge ST4 3 d synchronous modeling technology. In the process of design, synchronous modeling, parallel design, modular design technology and top-down assembly modeling technology are combined with in the design of corner conveyor. With modular ideas for design of thought to consider the overall structure of design scheme, design will turn into different parts of conveying design module to consider, and promote the standardization of product design. The key point in this paper is that synchronous modeling technology is used in the three dimensional modeling of corner conveyor, and shows that the technology in different modules and the cooperation between different designers. The results show that the application of the technology can reduce iterative design process and design error, thus the design efficiency of engineer is greatly improved.
Analysis about the Jointing Status for Dissimilar Metals of Steel with Magnesium
Authors: Yao Zong Xiang , Jiang De Ping , Pan Chao , Wang Xiao Ming
Published: November 2012

The research status of welding process between magnesium with steel have been surveyed．This article detailed the laser welding, Laser-TIG hybrid welding, pressure welding,diffusion brazing. The paper pointed out that it is a prominent problem of magnesium to be oxidated easily and existing intermetallic compound in the joint, which will produce adverse effect to property of welded joint. So how to control morphology and existence state of intermetallic compound (IMC) is the key for quality connectors in joining of magnesium with steel.
The Application of 7 Diamond Process in the Automobile Quality Control
Authors: Chen Ting , Gao Yang , Yuan Qun
Published: November 2012

With the rapid development of domestic automobile industry, product quality issues are also increasingly prominent. 7 Diamond Process is one of analysis method and tool used for the automotive industry to solve quality problems and difficult problems, it is a standard seven-step method used to promote problem-solving. Moreover this paper introduces the concept and content of 7 Diamond Process, by giving a practical example, the detailed steps of 7 Diamond Process applied in automobile quality problem analysis are described. It will become an effective tool to improve the quality level of automotive products.
The New Methods for Non-Steady Productivity Prediction of Condensate Gas Reservoir and the Application Evaluation
Authors: Pang Jin , Liu Hong , Yu Xi Nan
Published: November 2012

In view of the existing shortcomings of the analysis methods for the production system of conventional condensate gas well, the new method that adopts the non-steady gas reservoir seepage and the wellbore coupling has been proposed in this paper, in other words, the gas nozzle control, the wellbore flow and the reservoir seepage have been considered as the coupling entirety; the traditional nodal analysis has been combined with the well test analysis of non-steady seepage; the new production system analysis methods have been employed to discuss the characteristics of gas reservoir seepage, wellbore flow and gas reservoir boundary; at the same time, the changing trends of indicators in the development process have been also analyzed. Afterwards, the coordination state and the changes of parameters of the production system can be predicted in different production methods and different times. And the better results can be obtained through the application evaluation of YK1.
The Application of Foundation IE in the Improvement Production Line Balancing of Hot Galvanizing Steel Grating
Authors: Hu Xiao Xing , Yin Hong , Zhang Jun
Published: November 2012

With hot galvanizing steel grating production line of a company as the research subject, combining with the knowledge of production line balancing and statistic analysis, the thesis analyses the present situation, and then find and improve the working procedure of "bottlenecks". By using related technologies and methods of foundation IE, the study carries out the flow process analysis, operating analysis and action analysis, and optimizes the existing different problems of related working procedure and operating work in the production line.
The Research and Design about Hydraulic Shears of Medium Plate Milling
Authors: Wang Pei Feng , Ding You Qing
Published: November 2012

This paper briefly introduces and analyzes the basic working principle of the hydraulic shears of medium plate milling. This design can meet the optimum requirements of the hydraulic control system, such as the shear synchronization control and the distribution of shearing force.
Synthesis and Light-Emission Properties of Manganese-Doped Calcium Zirconate Phosphor and Manganese-Doped Strontium Zirconate Phosphor
Authors: Wang Bai Bin , Chang Chi Fen , Li Yan Ru , Chau Thanh Nam , Yang Wein Duo
Published: November 2012

This study successfully synthesized manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor using the sol-gel method. We employed X-ray powder diffraction and fluorescence spectroscopy to analyze the crystal structure and spectral characteristics of both phosphors. In X-ray powder diffraction analysis, data related to manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor were compared using X-ray diffraction comparison software to confirm the crystal structures of both phosphors. The crystal structure of manganese-doped calcium zirconate phosphor was in accordance with orthorhombic perovskites belonging to the Pnma {62} space group. The lattice parameters were a=5.762 Å, b=8.017 Å, and c=5.591 Å; c/a=0.97; volume=258.3 Å3, and density=4.611 g/cm3. The crystal structure of manganese-doped strontium zirconate phosphor conformed to orthorhombic perovskites belonging to the Pnma {62} space group, and the lattice parameters were a=5.818 Å, b=8.204 Å, c=5.797 Å; c/a=0.996; volume=276.7 Å3, and density=5.446 g/cm3. Fluorescence spectroscopy indicated that the primary broadband peak of manganese-doped calcium zirconate phosphor was located at 396.6 nm in the excitation spectrum corresponding to the 4T2(4G)4T1(4P) energy level transition. In the emission spectrum, the primary broadband peak was located at 596.6 nm, corresponding to the 4T2(4D)4T2(4G) energy level transition. For manganese-doped strontium zirconate phosphor, the primary broadband peak was located at 496.6 nm in the excitation spectrum and at 696.6 nm in the emission spectrum, corresponding to the 4T1(4G)4T2(4D) and 4E(4G)4T1(4G) energy level transitions, respectively.
Study on the Photocatalytic Degradation of Methylene Blue Dye on Titanate Nanotube Powders Prepared by Methanol-Thermal Process
Authors: Chau Thanh Nam , Sung Yi Ting , Wang Bai Bin , Yang Wein Duo
Published: November 2012

Titanate nanotubes were synthesized by a solvothermal process at a low temperature in a highly alkaline water-methanol mixed solution. Powders were characterized by XRD, TEM, BET and UV-vis absorption spectroscopy. The as-prepared samples was tested by the adsorptive process and photodegradation reaction of methylene blue (MB) dye under visible-light irradiation. The results indicated that the titanate samples are synthesized in the methanol-water volume ratios of 10:90, 20:80 and 30:70 are still highly absorbability and all the titanate samples as-prepared have higher photocatalytic activities compared with TiO2P25 in the degradation of MB under visible light irradiation.
Assessment of Hole Quality and Thrust Force when Drilling CFRP/Al Stack Using Carbide Tools
Authors: Ashrafi Sina Alizadeh , Sharif Safian , Yazid Yahya Mohd , Davoudinejad Ali
Published: November 2012

Drilling composite materials is challenging due to the anisotropic and non-homogenous structure of composites. In fabrication works, metals are joined to composites to form a hybrid strengthened structures, and this posed a great problem during drilling, due to the dissimilar drilling conditions for each material and also sharp metal chips effect on the quality of hole on composite plates. This paper evaluates the experimental results on the machining performance of coated and uncoated 4 facet carbide drills when dry drilling stack of carbon fiber reinforced plastic (CFRP) and aluminum. Drilling trials were carried out on CFRP/Al2024/CFRP stack at constant cutting speed of 37 m/min with three feed rates within 0.03-0.25 mm/rev. Results revealed that 4 facet coated drills performed better than uncoated drills in terms of delamination. It was found that hole entry delamination increases with increasing feed rate, however uncut fibers which were dominant at low feeds on hole exit, disappears with increasing feed rate. It was also found that thrust force for coated tools were quite higher than uncoated tools.
Exergetical Performance Assessment of Organic Rankine Cycle with Superheating
Authors: Kim Kyoung Hoon , Ko Hyung Jong
Published: November 2012

Organic Rankine Cycle (ORC) has attracted much attention in recent years, since it has potential of reducing fossil fuel consumption and many favorable characteristics to exploit low-grade energy sources. This work carries out an exergetical performance assessment of ORC with superheating comparatively for various organic fluids. Special attention is paid to the effect of evaporating temperature on the exergy destructions (anergies) at various system components and the exergy efficiency of system. Results show that for a given source both the anergies at the components and exergy efficiency may have a peak value or monotonically increase with evaporating temperature.
Commercial Transport Aircraft Flight Simulator Flying Qualities Airworthiness Verification
Authors: Zhang Ya Ni , Li Yan , Gao Ya Kui
Published: November 2012

Flight simulation is a simulation of flight and various aspects of the flight environment. Flight simulation is used for a variety of reasons, including aircraft development and flight training. The engineering flight simulator is used for a certain commercial transport aircraft development. The aircraft adopts fly-by-wire flight control technology. The engineering flight simulator was mainly used as a platform to test flying quality of the aircraft. The simulator has actual aircraft cockpit with wide-field visual system mounted on large six degree of freedom(DOF) motion platform that feature comprehensive flight and systems models. In order to demonstrate the flying quality of the aircraft, Flying quality verification experiments were carried out on the simulator. This test provided a means by which one may evaluate flight characteristics for fly-by-wire flight control commercial transport aircraft. Experiment results were evaluated .
The Measurement and Application on Point Impedance Characteristics of Violin Resonator
Authors: Zhou Jun Rong , Zhang Wen , Hu Ju Nan
Published: November 2012

This paper will study the vibration performance of resonator by using the engineering measurement, and try to quantify the sound quality of violin body with point impedance parameters so to provide an effective instruction method for the traditional manual of slap-up violin making.
Study on the Evaluation of Internal Financial Control of Higher Vocational College in China
Authors: Qi Shao Qiong
Published: November 2012

Based on concept of the financial internal control evaluation in higher school, This paper discuss the definition of financial internal control evaluation in higher vocational college, describes the meaning,content and necessity of financial internal control evaluation in higher vocational college. Later, the college financial internal control evaluation principle is the prerequisite, combining the fuzzy mathematical theory and control self-assessment approach the establishment of internal control fuzzy comprehensive evaluation model,through investigation questionnaire and index factor pairwise comparison we obtained score values and weight values,using mathematical methods such as matrix transformations to get the final evaluation results.
Application Research on Hand Painted of Product Design
Authors: Wang Yan Qun , Zhang Bing Chen , Wu Han
Published: November 2012

Hand painted of product design is not a pure creation of art painting. It is a technique method to organize and visual the product design which meets with consumer’s needs with guidance of design thinking and methods. It can rapid expresses design ideas, and examine design project and convey the true effect of the product design. As a designer the basic language of expression, hand painted run through the design process. It plays an important role to enhance the designer thinking. The using of hand painted in product design include enrich the accumulation of design, Inspire design, communication design, depiction of real emotion. It plays an important role to enhance the designer thinking.
Research on the Teaching Reform of Design Expression Course
Authors: Wang Yan Qun , Zhang Bing Chen , Huang Meng Die
Published: November 2012

Design Expression course is a very important basic course of Industrial Design to the students who learn this major, as it involves the expression and scheme of design idea. It will help students to develop design thinking and improve the professional quality that instruct students in understanding the importance of design expression correctly in the process of personnel training.
Research on Expert System of Crop Disasters Based on Neural Networks
Authors: Zhu Jie , Dong Wei , Zhang Jing , Liu Xu Ning
Published: November 2012

In order to improve the efficiency of prediction and diagnose of crop diseases and pests, and solve the problems during the course of crop production and management, then an neural networks with weight adjustment of prediction model is proposed. The crop disasters are regarded as example, after the symptoms of disasters and features are classified, abstracted and coded, the adjustment of weight, optimization of network structure and reasonable adjustment of parameters of BP neural network are discussed, then a model is constructed to forecast the disasters of crop, the weight is used as knowledge to predict disasters of crop through studying training samples. Results have shown that the optimization expert system of crop disasters based on neural network has enhanced the ability of decision making of expert system, then greatly improved the accuracy and reliability of crop diagnosis.
A New Normalized-Cut Image Segmentation Algorithm Based on Watershed Transform
Authors: Liu Hai Tao , Wang Yin Long , Yao Hui Fen
Published: November 2012

In this paper an improved image segmentation algorithm based on watershed transform is presented. Firstly the normalized cut method and watershed transform are explained and analyzed. Secondly the idea of the improved algorithm and the main formula are explained. We consider the area and perimeter when we merge adjacent regions. We define a new weight value and discuss the value of the parameterαandβ. Finally the experiment result is presented. The new algorithm reduces the nodes and the computational demand of the common normalized cut technique.
New Pattern Recognition Method Based on Wavelet De-Noising and Kernel Principal Component Analysis
Authors: Zhang Jia Jun , Liang Li Juan
Published: November 2012

The background noise influences the face image recognition greatly. It is crucial to remove the noise signals prior to the face image recognition processing. For this purpose, the wavelet de-noising technology has combined with the kernel principal component analysis (KPCA) to identify face images in this paper. The wavelet de-noising technology was firstly used to remove the noise signals. Then the KPCA was employed to extract useful principal components for the face image recognition. By doing so, the dimensionality of the feature space can be reduced effectively and hence the performance of the face image recognition can be enhanced. Lastly, a support vector machine (SVM) classifier was used to recognize the face images. Experimental tests have been conducted to validate and evaluate the proposed method for the face image recognition. The analysis results have showed high performance of the newly proposed method for face image identification.
α Extension of the Cubic Ball Curve
Authors: Wang Cheng Wei
Published: November 2012

Ball curve； curve design； shape parameter Abstract. Ball curve is found similar to Bézier curve，also it has a good property of shape preserving，and in some respects，it has better properties than the Bézier curve. Therefore, In the shape design，Ball curve is paid more and more attention, it has a wide application. By introducing the concept of weights in NURBS curve into a blending technique, the paper extends the representation of the cubic Ball curve. The generalized cubic Ball curve is denoted as α extension cubic Ball curve, whose shape-control capability is shown to be much better than that of Ball curve. The representation and properties of the extension curve are studied. The curve is easy and intuitive to reshape by varying the parameters; so it is useful in some applications of CAD/CAM.
A Combined Global Coarsening Method for 3D Multigrid Applications
Authors: Li Zong Zhe , Wang Zheng Hua , Yao Lu , Cao Wei
Published: November 2012

An automatic agglomeration methodology to generate coarse grids for 3D flow solutions on anisotropic unstructured grids has been introduced in this paper. The algorithm combines isotropic octree based coarsening and anisotropic directional agglomeration to yield a desired coarsening ratio and high quality of coarse grids, which developed for cell-centered multigrid applications. This coarsening strategy developed is presented on an unstructured grid over 3D ONERA M6 wing. It is shown that the present method provides suitable coarsening ratio and well defined aspect ratio cells at all coarse grid levels.
A Clustering Routing Algorithm Based Ant Colony Optimization for Wireless Sensor Network
Authors: Chen Xian Yi , Jin Zhi Gang , Yang Xiong
Published: November 2012

As ant colony optimization algorithm and clustering routing algorithm were discussed deeply, a clustering routing algorithm based ant colony optimization (CRAACO) for wireless sensor networks has been put forward. To test the performance of CRAACO, simulations have been done from information fusion rates, remaining energy and network lifetime. The experiment results show that the CRAACO can work effectively and may be used in wireless sensor networks.
A Maximum-Minimum Filtering Algorithm Base on Threshold
Authors: Dang Hong She , Tian Li Na , Zhang Fang
Published: November 2012

In allusion to the contradiction between salt-and-pepper noise attenuation and image detail-preserving, a maximum-minimum filtering algorithm base on threshold is proposed in this paper. The gray values of the pixels in the filtering windows are given firstly. If the test pixel value is the extreme value of the filtering windows, this pixel is a suspicious noise point. And then sort the absolute value of the difference between the suspicious noise point value and pixels gray value in its neighborhood. Judge the pixel is a real noise point according to the average value of the middle two values in the difference sequence. The original gray value of noise point is determined by the maximum-minimum relationship between the pixel values of the neighborhood. If the pixel is not a noise point, its value is kept. The simulation results show that the proposed algorithm has greatly impact on signal to noise ratio and mean square error which retains more image details while making sure to remove noise.
Research on the Optimization of Transportation Routing Problem of Warehouse Material Based on Self-Adaptive Ant Colony Algorithm
Authors: Bian Guang Rong , Li Hong Sheng , Dai Ge Lin
Published: November 2012

Ant colony algorithm is an intelligent optimization algorithm derives heuristically from simulating ants to seek food, the paper firstly creates the VRP model of warehouse material transportation,self-adaptive ant colony algorithm is used for solving the model. This paper gives some measures to improve the Ant colony algorithm in the procedure to seek the solution.At last, the experimental results based on MATLAB show that this algorithm is extremely effective to solve the optimal solutions of VRP. Its application in VRP has achieved good results.
A Novel Priority Based Packet Scheduling Scheme for Video Streaming over WiMAX Networks
Authors: Chen Li Shui , Liu Gui Zhong , Wang Jun Fang , Wang Qin Li , Wang Hai Dong
Published: November 2012

A priority based packet scheduling scheme for video streaming (rtPS) over WiMAX networks, which corporate with a resource allocation algorithm, has been proposed in this paper. After resource allocation algorithm allocates all the resources available among service flows, packet scheduling algorithm schedules packets in each packet queue according to current byte loss rate of video streaming queue. Priorities of the video packets in the queue and delays of these packets until all the resources for this flow are used up. Simulation results show that the proposed algorithm has better performance for video streaming and can protect the packets which have higher priority from being left, so the video quality has some improvement.
Research of Image Matching Based on Evolutionary Algorithm
Authors: Wu Qing Hua , Xie Fang , Sun Yu Xin , Zhang Jin , Yan Xue Song
Published: November 2012

In image matching research, how to ensure that best match’s accuracy of the premise and a significant reduction in the amount of computing is the focus of concern by researchers. Search strategy to find the best match location of the image matching process to determine the amount of computing of image matching, in the existing image matching method are used to traverse search strategy, it is difficult to reduce the amount of computing. This is a common defect of the existing image matching algorithm. Traditional evolutionary algorithm trapped into the local minimum easily. Therefore, based on a simple evolutionary algorithm and combine the base ideology of orthogonal test then applied it to the population initialization, to prevent local convergence to form a new evolutionary algorithm. Compared the traditional evolutionary algorithm, the new algorithm enlarges the searching space and the complexity is not high. We use this new algorithm in image matching; from the results we reach the conclusion: in the optimization precision and the optimization speed, the new algorithm is efficiency for the image match problem.
A Color Based Image Retrieval Method
Authors: Hu Zuo Jin , Jiang Yu Quan
Published: November 2012

By means of self-organizing clustering, a new color-based image retrieval method is proposed in the paper. According to the colors’ distributing information in the image, every pixel is assigned a weighing value and thus the initial number of clustering can be confirmed. Therefore, those weighed pixels are clustered and the dominant colors’ statistical features are acquired. Based on the dominant colors spread in the image, the colors’ moment features are extracted to present their spatial features simultaneously. Therefore, the whole image’s content can be expressed from general statistic to partial distributing by the two kinds of features. The experiments verify the method mentioned above more efficiently than those ways based on color histogram
A Novel Nanogap Fabrication Technique Using Taguchi Method and Modified Particle Swarm Optimization
Authors: Li Te Sheng , Chen Ling Hui
Published: November 2012

In this study, a novel nanogap fabrication technique is proposed. The technique is based on electron-beam lithography combined with rapid thermal annealing (RTA) to reduce the self-aligned nanogap on metal layer. The procedure running through systematic experimental design via Taguchi method and considering the critical factors such as metal type, Si thickness, RTA temperature, RTA time and initial nanogap dimension affecting the final nanogap dimensions was optimized. The experiments were conducted using Taguchi method and modified particle swarm optimization for setting the optimal parameters. The experimental results show that the most important factors in nanogap reduction were the metal type and the initial nanogap. The optimal parameter settings were metal type Pt on 50 nm Si/SiO2, 400°C, 60s and 43nm for initial gap. Experiment results found that the metal type Pt provided larger shrink ratio than that of Ni and nanogap down to 30 nm. It is also noted that the proposed approach was reproducible due to the confirmation experiments SNRs within the 95% confidence interval.