bluuebunny/crossref_metadata_2025 huggingface dataset:
An Interactive Oral Training Platform Based on Kinect for EFL Learning
Authors: Zhang Yang Rui , Huo Guang , Wu Jian Feng , Yang Jun Bo , Pang Chen
Published: December 2014

Nowadays, the emphasis of domestic oral English teaching is on grammar and pronunciation. Although many achievements have been made and theories have been established in this field, there are still some deficiencies in such traditional methodologies. Because of the lack of corresponding technologies and practices, few explorations have been made in how to make communication more effective and accurate by both verbal and nonverbal means such as facial expressions and gestures. It is not difficult to understand why the Chinese learners give native speakers the expression that they are dull and uninterested. For the aforementioned problems, in this paper, characterizing a combination of the latest biometric technology (recognition of voices, facial expressions and body movements) and Kinect, an interactive oral English training platform is designed. This platform targets training students' not only verbal but also nonverbal language abilities including pronunciation, intonation, especially facial expressions, body languages. With the evaluation of the practical application of the platform, it proves to be an effective way of improving their overall oral English abilities.
Solar Performance of a Dome-Covered House
Authors: Lin Yao Lin , Yang Wei , Zmeureanu Radu
Published: December 2014

A dome-covered house is an example of designing sustainable buildings by learning from the optimized biological forms from the nature. This paper presents the solar-thermal model for a transparent dome built above one of the several houses located in Montreal. The incident solar radiation on selected cells, the roof and wall surface are presented. The dome-covered helps to reduce the heating load by 79.3% on January 21st with annual average reduction of 92.9% and if the house is located in Yellowknife, the annual heating load reduction would be 56.3%.
Designing an Engineering System for Sustainability
Authors: Comm Clare L. , Mathaisel Dennis F.X.
Published: December 2014

How does one design an engineering system for sustainability? Sustainability engineering design is a discipline that has become increasingly important as systems become more complex, life cycle costs increase, and long run endurance becomes an elusive goal. To assist in mitigating this elusiveness, this paper introduces the concept of a System Sustainability Architecture (SSA) to organize the activities in an enterprise for designing an engineering system to be sustainable. The architecture is the application of systems engineering and information technology methods to design, develop, produce, construct, integrate, validate, and implement a sustainable engineering design. SSA is a framework used to align the people, operations, projects, and information technology assets in an enterprise with its sustainability characteristics. The architecting process incorporates lean manufacturing values as sustainable design requirements in creating the product. The application of the SSA is predicted to be less resource intensive and disruptive to the enterprise in the system’s life cycle than previous sustainability methods and practices. It is also essential that the merits of the SSA approach are communicated to the stakeholders to encourage its acceptance.
Environmental and Operational Performance Evaluation of Taiwan Thermal Power Plants
Authors: Lin Sue J. , Liu C.H.
Published: December 2014

An integrated environmental and operational efficiency model for evaluation of seven thermal power plants in Taiwan was constructed by data envelopment analysis (DEA). Inputs and desirable outputs along with 3 undesirable outputs, including CO2, SOx, and NOx emissions were simulated. From results we found that the integrated efficiency and the production scale of most plants were inefficient during 2001- 2008. Reductions in fuel consumption and CO2 emission are the major solutions for efficiency improvement. Other improvements include enhancing pollution control measures and optimizing power plant scales. Also, clean-coal technology and lower-carbon fuels should be enhanced to reduce CO2 emissions from thermal power plants in Taiwan. In addition, flue gas desulfurization (FGD) and high efficient selective catalytic reduction (SCR) and advanced low-NOx burners can be installed to remove extra SOx and NOx emissions. Findings of this study can be of value for improving environmental and operational performance of thermal power plants in Taiwan as well as countries with similar concerns.
Prediction of Spherical Phase Change Material Temperature Using RBFNN Model
Authors: Al Ghuol Fatah O. , Sopian K. , Abdullah Shahrir , Al-Ghoul Mohammed , Sheldin Mohammed , Whaad Ali
Published: December 2014

PCM system particularly plays an important candidate at off peak to improve thermal storage system. In this paper, predication of output temperature in integrated solar heat using RBFNN was proposed. First, a brief PCM numerical model including geometrical and operational parameters and discusses the effect this parameter on the output temperature. The working fluid temperature is uniform distributed and equal to collector output temperature. The learning data is theoretical generated by using standard solar collector integrated with 95 PCM modules. The RBFNN model has 3 input nodes representing spherical size, duct length and number of ball and two output node represented by first and last layer PCM temperature. Simulation result shows the predicted PCM temperature at first and last layer closely match with the analytical data from CFD.
The Progress of Millimeter / Submillimeter Wave TWT Research
Authors: Jin Hai Wei , Zhang Lan , Liu Jie , Qian Xu
Published: December 2014

Millimeter / Submillimeter wave traveling wave tubes have the merits of high output power, frequency bandwidth, compact, light weight, etc. Millimeter / Submillimeter wave traveling wave tube is an ideal millimeter / submillimeter radiation source, can be used in fields of radar, electronic warfare, communication, etc. The paper introduced and summarized the research status of foreign Millimeter / submillimeter TWT wave tube, analyzed and discussed its trend.
Power System Fault Diagnosis Based on Wavelet Transform and Neural Networks
Authors: Liu Jun , Li Lin , Long Qing Tao
Published: December 2014

Using the principle of wavelet transform in the aspect of signal singularity detection analyzes and detects the electric power system fault signal. Then we extract signal feature near the fault moment and sent the feature vectors into the neural network. The simulation results fully prove the effectiveness and superiority of combining wavelet transform and neural network in electric power system fault recognition.
A Brief Description of ESP Working Principle and Common Control Methods
Authors: Zhou Su Xia , Zhang Qian , Xue Rui
Published: December 2014

With the development of automobile technology, automobile active safety has been paid more and more attention. ESP is an essential component of active safety. Currently, ESP has slowly gained popularity, vehicle safety has been significantly improved. In order to make people have more in-depth knowledge of ESP, the author through reading a large number of documents to complete the article. This paper focuses on the working principle of ESP, and a brief description of its common control methods.
Influence of the Load Occupancy Ratio on the Dynamic Response of an Elevator Car System
Authors: Herrera Ignacio , Su Hui , Kaczmarczyk Stefan
Published: December 2014

In predictions of the dynamic behaviour of an elevator car system, it is important to take into account the influence of passengers’ behaviour in the car. In this paper a simulation model to analyse the influence of various loading car conditions on the dynamic response of the elevator system is developed. This involves the investigation of the dynamic response of the car with different loads. An experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is designed to conduct experimental tests. The car is excited over a range of frequencies and amplitudes. A number of passengers wearing different type of shoes in the car are investigated. The transmissibility measurements are carried out with a harmonic excitation applied first to an empty car and then to the car with a number of passengers. An excellent agreement from experimental tests with the model predictions is achieved. The passenger’s role to act as a dynamic absorber is assessed and recommendations to achieve the best ride quality under load conditions are provided and summarised.
A Comparison of Usage Costs of Roads in Selected EU Countries
Authors: Kot Sebastian , Ślusarczyk Beata
Published: December 2014

At present member states of the European Union apply a few different systems of collection of fares for riding individual types of roads. In spite of the fact that systems of collection of payments in each of member states are working on the same provisions included in Directive 1999/62/EC, amount of rates for riding roads in individual states develops on different level and is being determined on every state’s domestic legislation or regulations of individual roads’ private operators. In this article Authors presented cost analysis of using road infrastructure in chosen member states of the European Community creating a cost map of using road infrastructure in European road transport of goods.
Economical Analysis of Logistics Processes
Authors: Čulková Katarína , Weiss Roland , Weiss Erik
Published: December 2014

Logistics presents vast potential of the firm’s effectiveness, since it brings system how to create, provide and manage logistics chain that could contribute to the improving of economic results of the firm. Goal of contribution is to realize economic analysis of traffic and logistics operations with aim to improve economic situation of the firm through chosen economic and logistics indicators. During evaluation of economic situation we pointed to the possibilities to decrease cost, improve quality, productivity and increase effectiveness of logistics process.
Layer Thickness Optimization of Laminated Composite Plates to Maximize the First-Order Natural Frequency
Authors: Zhang Li Guo , Yang Kang , Zhao Wei Ping , Xiang Song
Published: December 2014

Layer thickness optimization is performed to maximize the first-order natural frequency of clamped laminated composite plates using the genetic algorithm and meshless global radial basis function collocation method. The objective function of optimization problem is the maximum first-order natural frequency; optimization variables are layer thickness. The optimal layer thickness and the maximum first-order natural frequency of the 2-layer plates are presented to demonstrate the accuracy of present method.
Study on Lubrication Simulation and Capability of Three-Lobe Journal Bearing
Authors: Qian Kun , Guo Wei Gang
Published: December 2014

The lubrication state of three-lobe bearing is simulated by using Reynolds equation. It concluded that the load-carrying capability of three-lobe bearing increases with the eccentric distance between the centers of axis and bearing with a nonlinear way. The largest bearing load-carrying capacity occurs in the eccentric direction of 30 °and making sure the eccentric direction can improve the stability of the system. To improve the rotation speed of the axis is beneficial to promote the load-carrying capacity.
Structural Principle of Hydraulic Engine
Authors: Zhang Hong Xin , Jiao Yu Qin , Zhang Tie Zhu , Cheng Lian Jun
Published: December 2014

Hydraulic engines can be widely used in many fields, such as agricultural machinery, construction machinery, duty vehicle, and many other fixing or mobile devices. The development analysis and study on their structural principle, technical and operational characteristics will be undoubtedly very useful for putting forward new type hydraulic engines. The structural principle of Hydraulic Free Piston Engine, Hydraulic Confined Piston Engine was introduced. The structural principle of Half Crank Hydraulic Engine (HCHE), which inherits the merits of traditional engine, HFPE and HCPE, was put forward.
An Analysis and Design of the Preparation Orbit for the Lunar Satellite
Authors: Zhang Xiao Mei
Published: December 2014

On the basis of the moon as regular sphere approximately, establish fixed coordinate system of the moon, In the condition of the least energy consumption, collecting information furthest, landing on the landing point precisely and so on, found the astronomy model which is based on geometric area. Meanwhile, combined with the direction and cycle of the moon's Autobiography, as well as the formula of universal gravitation etc, analyze and design the preparation orbit, then work out the related parameters.
An Investigation on the Microstructure Evolution of Al-5Ti Alloys during an ECAP-CASTEX Process
Authors: Li Ying Long , Ding Hua
Published: December 2014

Al-5Ti alloy wires with fine grain microstructures were prepared via a continuousequal channel angular pressing process with 1 to 4 passes in a castingextrusion (CASTEX) equipment equipped with a multi-channel die. The evolutionof Al-5Ti alloy microstructure during each forming pass was investigated. Thefracture of TiAl3particle phases during deformation, as well astheir interaction with deformation, was also analyzed. The results proved that thecontinuous equal channel angular pressing process can effectively refine Almatrix structure and TiAl3particle phases, improve thestrengthening effect of TiAl3reinforcing particles on the matrixmetal and produce wires with fine grain microstructure.
A Test to Measure the Rate of Adsorption Deformation of Flexible Assembly Tooling
Authors: Qu Li Gang , Chen Guo Tao , Su Chang Qing , Xin Yu Juan
Published: December 2014

Traditional tooling for aircraft skin will produce a large clamping deformation of the inadequacies in the assembly process, designed a vacuum suction cup flexible assembly tooling, that tooling using vacuum suction force to clamp the workpiece in the assembly process, greatly reduces the amount of deformation of the workpiece. In order to accurately grasp the new tooling excellent performance in terms of adsorption deformation, through the establishment of a laser measuring device test platform, we conducted a large number of studies of vacuum adsorption deformation experiment on different thickness of the workpiece,has been obtained the workpiece adsorption deformation rate range under the flexible tooling system, as well workpiece thickness, sucker adsorption, the number of anchor effect on the adsorption deformation rate of the workpiece, and verify the reasonableness of the flexible assembly tooling.
Development and Application of On-Line Monitor for the ZLW-1 Axis Cracks
Authors: Jin Jian Guo , Wang Zhan Zhou
Published: December 2014

This article mainly introduces a method that uses acoustic emission techniques to achieve on-line monitor for the shaft cracks and crack growth.According to this method,axis crack monitor is produced by acoustic emission techniques.This instrument can apply to all the pressure vessels,pipelines and rotor machines that can bear buckling load.It has the online real-time monitoring,automatic recording,printing,sound and light alarm,collecting crack information function.After a series of tests in both laboratory and field,it shows that this instrument is very versatile and possesses broad prospects of development and application.
Dynamic Characteristics Optimization of Joint Interface of Machine Tool Based on Porous Oily Materials
Authors: Ma Jian Feng , Li Qiang , Feng Ji Kun , Wu Liang Sheng
Published: December 2014

The joint interface plays a significant role in machine tools and other machineries. A novel type of joint which consists of oily porous material was proposed in the paper. A test system for identifying the unit area dynamic characteristic parameters of Fe-based joint interfaces were represented. The stiffness and damping parameters were compare to the conversional structures. The result showed that the joint which contains an oil film interlayer formed by porous and steel was superior to the joint with non-media formed by steel in stiffness and damping characteristics. In the case of the same preload, the former’s stiffness is increased by about 50 %, and the damping is increased about five to six times.
Design of Pocket Dies for Metal Extrusion Using the Finite Element Method
Authors: Sena Khemajit , Piyasin Surasith
Published: December 2014

Metal extrusion is currently very beneficial for producing workpieces with long dimensions or when a uniform cross section area is required. Design of extrusion dies, which results to the shape, geometry and size of the workpiece, is the main factor for quality, productivity and durability of the products. Besides improving the bearing length, a die pocket is a good solution to effectively control the velocity of material flow into the die hole. Therefore, this study aimed to evaluate the structures of die pockets that influence the material flow in the extrusion process. Thus, the finite element method (FEM) was used to determine the parameters that affect the strength of the extrusion die due to the maximum stresses which occurred on the die and pocket. From this study, it was found that the circular shaped pocket with 31degrees pocket angle, 22 mm pocket die thickness and made of titanium alloy provided the maximum strengths and safety factors. This result from the simulations can sufficiently predict the risk of damages on the extrusion die and pocket for further extension of the tool’s life cycle.
EPCIS Implementation and Customization for Automotive Industry
Authors: Benes Filip , Svub Jiri , Stasa Pavel , Kebo Vladimir , Unucka Jakub
Published: December 2014

The article deals with the possibilities and advantages of implementing radio-frequency identification technology (hereinafter referred to as “RFID”) and the electronic product code information system (hereinafter referred to as “EPCIS”) in manufacturing facilities in the Czech Republic. It describes the common efforts of many partners aimed at establishing and implementing a customized system supporting members of the logistics and manufacturing chain, in particular, in the automotive industry. The article describes research and development in the field of EPCIS systems and experience of a RFID laboratory in the field of EPCIS, summarizing the steps achieved in the first year of the project.
Application of RFID Technology in Public Transport Company
Authors: Balog Michal , Szilágyi Erik , Marton Dávid
Published: December 2014

Our aim is to deal with the application of RFID technology in real conditions. Increasing interest in Radio Frequency Identification and related numerous applications for increasing automation in information systems has become an area of ​​interest public transportation applications. The reason for the application of RFID technology is tracking entrance/exit of vehicles to or from the parking area. The main expected benefits arising out of the introduction of this system is considered to maximize efficiency in payments to external carriers parking operator for services related to the use of the bus park for a period of time.
Analysis of Hydroelectric Unit’s Upper Bracket Based on Test and FEM
Authors: Xia Mi Mi , Li Yong Gang
Published: December 2014

To research the load upper bracket of Francis hydroelectric unit, then established the finite-element model, and analyzed the structure stress of 7 operating condition points with the ANSYS software. By the strain rosette test, acquired the data of stress-strain in the area of stress concentration of the upper bracket. The inaccuracy was considered below 5% by analyzing the contradistinction between the finite-element analysis and the test, and match the engineering precision and the test was reliable. The finite-element method could be used to judge the stress of the upper bracket, and it could provide reference for the Structural optimization and improvement too.
Modeling and Simulation of a New Type Intelligent Gas Pressure Regulator
Authors: Wang Yi Tong , Ma Jun Gong
Published: December 2014

In the view of the traditional purely mechanical regulator’s disadvantage, this paper proposed a new type intelligent gas pressure regulator. Its advantage is the ability to achieve accurate output pressure, remote control and centralized management. It can resist the disturbance of inlet pressure and flow rate changes. In this paper, we introduce the regulator’s structure, working principle, mathematics model and simulation model. According to the simulation result, it can basically meet the working demand.
Mathematical Model of Obstacle Avoidance Shortest Time Path for Robot
Authors: Duan Lu Ling , Wang Pin , Ruan Ni
Published: December 2014

In this paper, we study the mathematical model of obstacle avoidance shortest time path for robot. From origin to specified point, the robot shortest time path is divided into three cases, then we establish three mathematical models , through mathematical software, we get three required times, by comparison, we can get results of optimal path.
An Improved Purging Control Algorithm for Small Power PEMFC
Authors: Fang Jian , Qi Wei , Xiao Duo
Published: December 2014

Hydrogen energy is a kind of important clean energy. PEMFC(Proton exchange membrane hydrogen fuel cell) is a kind of effective hydrogen energy utilization device. It has many advantages, such as simpler structure, lower energy consumption, high reliability, quick start and easy for controlling. For the air-cooled type hydrogen fuel cell, temperature and humidity inside the PEMFC are the main factors. According to the 150W small power air-cooling type hydrogen fuel cell, the paper presented an improved purging control algorithm based on the fuzzy control. Through the dynamic adaptive control of exhaust gas purge, the PEMFC can work efficiently in the appropriate humidity conditions. The experiment results show that compared with the traditional timing purging, the proposed algorithm can effectively improve the work efficiency of the PEMFC, and reduce the hydrogen consumption
Research on Big Data Consistency Algorithm of Multi-Sensor Fusion
Authors: Duan Jing Xuan , Wang Han Sen
Published: December 2014

For the situation of data inconsistency and error irregular in multi-sensor detection, this paper based on the traditional measure of consistency, introduced Mahalanobis distance measurement to achieve approximate evaluation of data consistency between two sensors; then combined with the nature of membership function in the fuzzy theory to define support functions which measure the local measurement information and utilization efficiency, thereby obtaining assessments to sensor detection with better observations reliability, higher reliability. Simulation results show that, the weighted reliability to the measurement of multi-sensor observation data consistency can significantly improve the robustness of consistency measure, can eliminate the influence of sensor performance due to instability, effectively identify the sensor with unstable performance and remove it, providing data integration with sensors in consistency.
Fracture Research on Preheating Installation of Directly Buried Heating Return Water Pipe with Large Diameter
Authors: Fu Yue , Wang Fei , Wang Guo Wei , Lei Yong Gang
Published: December 2014

Pipe fracture and compensator tear may happen when directly buried pipes with large diameter, high temperature and pressure adopt preheated installation. Combined with engineering, this paper analyzes theoretically the fracture accident on DN1200 return water pipe during the period of cold operation and analyzes various factors which cause the pipeline fracture, when adopt open ditch electric preheating. By the numerical simulation, the size of influence factors on fracture was obtained, and the conclusion that the tensile stress is greater than the compressive stress was also obtained, where the preheating temperature was defined by means of “intercycle temperature”. It is worth nothing, the buried pipeline will emerge vertical bending under the main impact of soil and transportation loads. The vertical bending is related to pipe base, and the value of curving stress will be very big if the pipe base is mishandled. The coupling effect of curving stress and the temperature tensile stress can lead the pipeline to fracture, such as the disposable compensator place, the pipeline welding place, corners, the pipe wall flaw place and so on. This paper proposed the effective preventive measure which may reduce the occurrence probability of pipeline fracture during temperature drop process.
Research on Jamming Resource Scheduling Based on Multi-Target and Fuzzy Multi-Stage
Authors: Wang Fa Long , Rao Shi Jun , Jiang Ning , Wang Dong
Published: December 2014

For radar and electronic warfare integrated system, resource scheduling play a big role in operational effectiveness. At first, introduced the composition and technical performance advantage of radar and electronic warfare integrated system. According to radar jamming equation, the characteristics of array, combined with jamming time-window, jamming efficiency ratio, jamming satisfaction, established multi-target fuzzy multi-stage jamming resource scheduling model with time-window, through the simulation, proved the scientificity and rationality of the method.
The Overall Structure of IOV and the Research of the Unsolved Key Technology of IOV in Intelligent Transportation System
Authors: Li Fan , Jian Yang , Zhao Ran
Published: December 2014

Internet of Vehicles is the basis of the application of intelligent transportation system .This article has carried on the analysis and discussion about the concept of IOV, overall structure and the key technologies which are desperately need to be solved to promote application and development of IOV system.
Doherty Power Amplifier with Dynamic Power Dividing Network for Enhanced Efficiency
Authors: Xi Wang , Shi Yu , Yang Shao Lin , Li Jun
Published: December 2014

In this paper, we present a high efficiency Doherty power amplifier (PA) employing dynamic power dividing network which automatically adjusts the input power division ratio in accordance with the level of input power to enhance efficiency. Doherty PA circuit parameters of each amplifier are determined by basic performance analysis according to the datasheet. Simulated circuits through Advanced Design System (ADS) exhibit an improvement of 4% at a 6 dB backoff point from its saturated output power (PSAT) than that of a conventional Doherty PA. Implemented Doherty PA using two Freescale MRF6S27015N laterally diffused metal oxide semiconductor (LDMOS) field-effect transistors (FETs) achieves excellent drain efficiency of 46.5% at a 6 dB backoff point from PSAT, which is 2% higher than conventional Doherty PA.
Network-Coding-Based Mutually Cooperative Transmission in Deep Space Communications
Authors: Yao Xue Lu , Zhu Xiao Ran , Yu Pu
Published: December 2014

In deep space exploration, spacecrafts need to deliver large volume of time-insensitive scientific data to deep space station. However, power supply of spacecrafts is only from the solar energy and battery. That is to say, these spacecrafts are energy-limited. In order to reduce energy consumption, prolong the life of spacecrafts and send more data, the transmission protocol must be efficient and low-energy-waste. To achieve the aim, this paper proposes a network-coding-based mutually cooperative transmission protocol (NMCTP). Compared with the known protocols, i.e., COPE protocol and repeating transmission protocol, NMCTP can achieve higher diversity gain, and lower system outage probability.
An Optimized Design of Safety Messages’ Communication Sub-Layer in Vehicle Ad-Hoc Network
Authors: Song Xiao Yu , Tan Guo Zhen , Liu Ming Jian , Zhang Fu Xin
Published: December 2014

As a type of Mobile Ad-Hoc Network (MANET), Vehicle Ad-hoc Network (VANET) has its own features such as high speed vehicles, large number of vehicles and highly dynamic driving environment. These features bring new requirements to VANET. Transmission speed, respond time and reliability level of communication have very strict instantaneity and Quality of service (QoS) demands. There are many optimized designs to satisfy the demands on each layer of communication in VANET. But there are lack of optimized works on safety messages’ communication sub-layer. In this paper, we introduce queuing theory to model and design the communication sub-layer. The results of simulation and field test show our design has achieved the requirements on both performance and function. The average improvements on performance are one times than before.
Research on Locality Preserving Discriminant Projection Algorithm Based on Gabor for Face Expression Recognition
Authors: Gong Wei Yu , Lu Fang Xia
Published: December 2014

For the problem of features extraction and dimensionality reduction of expression recognition, the paper proposes Gabor Locality Preserving Discriminant Projection (GLPDP) algorithm, which is based on Gabor Wavelet. Firstly, we use Gabor wavelet transform to have an expression feature extraction. Secondly, we improved the locality preserving projection (LPP) algorithm, introducing scatter difference in the LPP objective function to increase divergence constraints among the sample classes and extracts more discriminated features while having the dimensionality reduction. Finally, we use the nearest neighbor classifier to have a classification for expression category. The effectiveness of the proposed methods is validated through the experimental results on JAFFE and Cohn-Kanade Facial expression databases.
A Simplified Model of Semi-Open Impeller Stage and Analysis of its Effects on the Transient Flow
Authors: Hao Mu Ting , Xie Rong , Guan Liang , Lu Zi Fu
Published: December 2014

The centrifugal compressor is one type of vital energy conversion equipment and its unsteady characteristics are extremely complex in actual operation. A semi-open impeller stage with inlet guide vanes, an impeller and a diffuser in a centrifugal compressor was concerned. For simulation of unsteady flow, the full-passage model of the integrate stage requires much more simulating time and memory space, higher computer configuration. Therefore, a single-passage simplified model was established for unsteady analysis. The internal flow characteristics and aerodynamic load on the blade obtained by the simplified model were also compared with that by the full-passage model. The result shows that the precision of the simplified model can meet the engineering requirement. Compared with the full-passage model, the simplified model can give a relatively true reflection of the local flow characteristics and the aerodynamic load on blade surfaces, but it ignores the unevenness resulted from unsteadiness along circumferential direction. Only high-frequency information is retained in aerodynamic load analysis while low-frequency one is diluted. However, as far as the local flow pattern or high-frequency information resulted from unsteady effects is concerned, the simplified model provides the advantages of higher computational efficiency and lower hardware requirements.
Possible Solutions for Checking Particulate Matter Filters (DPF) in Motor Vehicles
Authors: Lenďák Peter , Jablonický Juraj , Uhrinová Daniela , Kosiba Ján , Polerecký Ján
Published: December 2014

Solid carbon (C) is produced during hydrocarbon fuels combustion by the molecules heat decomposition process in a local lack of oxygen. More reactive hydrogen consumed the part of oxygen in the zone of an oxygen-rich mixture, so carbon particles are not gaining access to oxygen. Solid carbon particles are bound to other various materials such as mechanical impurities, sulphates, condensates, and liquid fuel residues, some of them with high toxicity – such as polycyclic aromatic hydrocarbons (PAH). The cause of high solid carbon emissions is a significant inhomogeneity of the mixture up to the value λ = 0 inside the fuel droplets where oxygen absences up to λ = ∞ in the space where fuel does not even come. Therefore, solid carbon emissions highly depend on the quality of atomization of the fuel which is injected into the cylinder. The supply of oxygen required for oxidation is improved by increasing the total amount of the air in the cylinder. In Slovakia as well as in other countries (the Czech Republic, etc.), there have been recently multiple instances of removing catalysts from vehicles by services, deactivation of diesel particulate filters (DPF, SCR), or vehicle control units reprogramming (tuning), or a combination of the previous actions. From the perspective of a company and its interest, it is a large interference with vehicle design, and it also affects the relationship with the environment. From the perspective of society, it is irrelevant whether it is the individual's conduct or the conduct of certain groups. This article explores the possible solutions for checking the illegal diesel engines conversion due to deactivation of particulate matter filters in exhaust systems of diesel engines as well as the current legislation that covers this issue.
Warm Stamping of the 3rd Generation Sheet Steel for Automobiles
Authors: Dong Han , Wang Cun Yu , Chen Ying , Cao Wen Quan
Published: December 2014

The advantages and disadvantages of the conventional hot stamping steel and the hot tamping technology were shortly reviewed. It was proposed that new type steel with relative low austenization temperature and air hardening ability should be designed and produced to overcome the surface oxidation and avoid the complexity of cooling system of the stamping dies. In this study, it was shown that the 3rd generation sheet steel with medium-Mn composition could be austenized and pressed at 700-750°C and air cooled into automobile parts with strength no less than 1.5GPa and ductility larger than 12%. This new steel and corresponding forming technology were called warm stamping technology, which overcomes the disadvantages of the conventional hot stamping steel. The fabrication trials of the automobile parts in the automobile industries were demonstrated with high strength and relative good ductility. It was concluded that the 3rd generation sheet steel and the warm stamping technology could be applied to replace the conventional hot stamping steel and conventional hot stamping technology in near future.
Hot Stamping Technology for Door Impact Beam
Authors: Tseng Chun Hao , Li Ming Fu , Su Kuan Yu , Tang Kai Min
Published: December 2014

In response to the increasingly stringent environmental requirements and collision regulations, the high strength steel has become the mainstream trend of the automotive materials. This study used door impact beam as the experimental vehicle, applied CAE simulation analysis, and conducted experimental verification to discuss how to reduce the thinning condition of the formed sheet metal parts. Then, the hardness test, thinning rate analysis and 3D curved surface scanning were performed to check the mechanical properties and external dimensions of the finished products of hot stamping. The results are used as the reference for door impact beam forming die design.
Implementation of Wear Models for Stamping Tools under Press Hardening Conditions Based on Laboratory Tests
Authors: Deng Liang , Mozgovoy Sergej , Hardell Jens , Prakash Braham , Oldenburg Mats
Published: December 2014

Tool wear occurring in press hardening processes receives insufficient attention since its corresponding measurements and full-scale experiments are complicated and expensive. This paper presents a study of tool wear in press hardening based on laboratory experiments and FE-simulations. Two experimental laboratory setups depending on the contact conditions in press hardening build the base for the wear models implemented in the FE-simulation to predict wear depths. The highest wear depth is found at the radius of the stamping tool and the discrepancies in wear predictions based on the two different laboratory test setups are analyzed.
A Study on High Speed Tension Property of C-Grade Bullet Proof Steel Plate
Authors: Ma Ming Tu , Zhao Yan , Fang Gang , Feng Yi
Published: December 2014

In this paper, the high speed tension experiments have been performed on ultra high strength bullet proof steel. The samples were cut from the bullet proof steel plate after hard-module quenching with thickness of 3.7 mm. The mechanical properties at strain rates of 0.001 s-1, 0.01 s-1, 0.1 s-1 and 1 s-1 were carried out on MTS810, while those at higher strain rates of 200 s-1, 500s-1 and 1000s-1 were tested on HTM5020 high speed tension tester and Hopkinson bar. The data from the high-speed tension experiments were fitted via Johnson-Cook constitutive equation, and the fracture surface of each sample was analyzed by SEM. The results indicate that, the shoot-resistance capability of bullet proof steel is closely related to its strength, thickness and flow behaviors under high strain rate. The shoot-resistance will be improved in the case of higher strength and better matching between strength and elongation. The Johnson-Cook equation fitted via experimental data provides fundament to numerical simulation. With the increase of strain rate, the size and depth of dimple trend to decrease and the depth of dimple changes less in steel with lower strength and higher elongation. The SEM analysis of fracture is benefit for further understanding of deformation and fracture mode under high strain rate.
Preparation and Adsorption Study of Gelatin/Activated Carbon Composite Bead Form
Authors: Hayeeye Fareeda , Sattar Maimoon , Chinpa Watchanida , Sirichote Orawan
Published: December 2014

The aim of this work is to prepare the Gelatin/Activated Carbon (GE/AC) composites in bead form using for adsorption of Rhodamine B. The scanning electron microscope (SEM) shows smooth surface and pore distribution for an external and internal GE/AC composite bead, respectively. FTIR-ATR spectra indicate the presence of AC on the GE/AC bead surface. It was found that an increase in the AC content in GE solution from 0.5 to 2.5 wt% resulted in an increase in the percentages of dye adsorption of GE/AC bead from 13.79 to 52.87%. Under the study of equilibrium isotherm it was found that the adsorption isotherm of Rhodamine B follows Langmuir isotherm model. The results indicate that GE/AC adsorbent could be employed for removal of cationic dyes from textile effluent.
Design and Construction of a Small Reverberation Chamber Applied to Absorption and Scattering Acoustic Measurements
Authors: Hernandez D. , Liu E.J. , Huang J.H. , Liu Y.C.
Published: December 2014

Reverberation chambers are used to create a diffuse incidence sound field, where multiple types of acoustic measurements can be performed. The chambers tend to have a large volume in order to extent the reverberation time. However, this requirement may be conditioned by the cost and the infrastructure limitations. This paper presents the design and construction of a small-scaled reverberation chamber of 3 m3 for middle-high frequency acoustic measurements. On the design, the acoustic characteristics of chamber are confirmed via finite element computer simulation. As case studies, absorption and scattering coefficients of several materials and diffusors are measured. The reverberation times needed for the measurements were obtained by the impulse response integration method. The small reverberation chamber demonstrated to be a reliable tool for middle and high frequency acoustic measurements.
Robotic System Used for Navigation and Tracking, in Real Time, with the Obstacle Avoidance
Authors: Popescu Dan , Ichim Loretta , Fratila Radu , Gornea Diana
Published: December 2014

Tracking the road or a mobile object and also obstacle avoidance are very important components that must be considered in the process of developing a robotic system. In this paper we propose a mobile platform for indoor navigation, based on a cheap computing hardware, which is able to be configured in two scenarios: the first refers to the movement of the robot on a predetermined path and to avoidance the obstacles, while maintaining the final target, and the second refers to the possibility of identifying and tracking a target. The robotic system aggregates the information acquired from different sensors and combines the computing resources from the mobile platform with those from the central unit. MATLAB is used for all the implementations and tests, to develop algorithms and to create models and applications. The robot's communication with central unit is wireless. Experimental results show that the mobile platform is able to perform, in real time, the following tasks in indoor environment: the recognition of the object, localization and tracking and also the obstacles avoidance.
Research on Semantic Workflow Establishment of Vessel Survey Field Operation
Authors: Lu Wen , Fan Shi Dong , Cao Ji Yin , Wang Chun Ping , Dong Pei Ling
Published: December 2014

Vessel survey is a kind of technical method to ensure the health and safety of the vessel. The main purpose of the paper is to find a way to extract workflow of vessel survey field operation (VSFO) directly from rule-based document (RBD) of the field, introduces the relevant researches on the vessel survey field, and analyzes the novel way to improve the quality of vessel survey via intelligentized aided technologies. The establishment of VSFO workflow is treated as the major concern in the work, and relative studies in other fields are introduced. After the comparison, three characteristics of VSFO workflow are discussed. On the basis of previous studies, a semantic approach of the establishment is proposed, and the whole process consists of several steps. Firstly, the structure of RBD in vessel survey is discussed; meanwhile, vessel survey domain ontology (VSDO) is built with rules in RBD. Secondly, the classification algorithm is designed with the original framework provided by domain experts. Finally, the distance calculation of clustering is divided into three parts: reachable distance, structural complexity and survey content complexity.
The Design of Constant Pressure Water Supply Control System for City
Authors: Li Shi Chen
Published: December 2014

This paper mainly introduces the application of frequency control in constant pressure water supply, describes the principle of constant pressure water supply technology, and its system structure based. This paper presents the basic principle of the inverter and the composition of hardware and software, selection of a frequency converter in constant pressure water supply system and use, comprehensive introduction to the structure of the constant pressure water supply system.
Verifying the Strength of the Cardan Transmission Joint through the Finite Element Method
Authors: Avrigean Eugen
Published: December 2014

The work presents the aproach of the finite element investigation of the cardan transmission joint. We treat the problem of structural behaviour, such as analyses that target the strength-related behaviour. It is thus sought to determine certain parameters (nodal displacements, stresses, strains) in the conditions of applying various types of loads - forces, pressures or moments. For this, we used a software for finite element analysis – Cosmos - a product integrated in the Solidworks package. We insisted on calculation of the cardan transmission for Dacia 1307 but they can be easily transposed also to other typodimensions of cars, machines or medical devices from the same category.
PLC-Based Constant Pressure Water Supply Control System Design and Implementation
Authors: Li Yi Hua
Published: December 2014

PLC-based constant pressure water supply control system may well improve the automation level of constant pressure water supply, ensure the water supply system pipe network pressure balance, has the advantages of fully automated control and good energy saving effect, plays an important role and has great significance in ensuring the residents and industrial water demand, improving water quality, and maximizing economic and social benefits .
The 3-D Structure Reconstruction of Engine Intake Manifold Based on RE Technology
Authors: Wang Cai Yun , He Zhi Xia , Yan Xue Sheng , Zhang Guo Jun , Wang Shuo
Published: December 2014

Engine intake system is one of the important parts of the engine which affects the engine’s volume efficiency and the uniformity of air entering to each cylinder directly Wherein the intake manifold with variable length is the important part of the intake system , has great significance value to research. Due to the structure of the manifold is complex, considering the manifold structure which affects the simulation accuracy, the principle of reverse engineering was used in this paper. Firstly, the laser scanning technology was used to obtain the point cloud data of the intake manifold.And then the cloud data was dealed by software Geomagic Studio12、NX Imageware13.The software UG8.0 was used to reconstructure the 3d intake manifold with variable length model.
Guard against Theft Detector Design Based on Single Chip Microcomputer Signal Processing Technology
Authors: Li Xiao Feng
Published: December 2014

With the development of social economy, has become more and more concern about the burglar. Iron bars can't bring too much sense of security, such as the societal demand for alarm equipment is becoming more and more urgent. Intelligent anti-theft system, is made for the purpose of safety technology to prevent system. He includes on modern physics and electronic technology in invasion into vandalism. Produce sound and light alarm effectively deter criminals and remind the personnel on duty to take appropriate preventive measures. This paper simply introduces the needs of the original design, and then focuses on the interior control system of intelligent anti-theft system circuit system..
Based on Asp Sales Management System Design and Implementation
Authors: Liu Bo
Published: December 2014

Of this study is based on asp sales of relational database management system, andtoday most online sales management system, the system has the interface designbeautiful, functional design humanization, etc. Although online bookstore in Chinahas just started soon, but develop quickly; As China's Internet more popularand online bookstores more hasten is mature, there will be more and moreconsumer groups, market potential will be into full play.
Construction Project Costs Management Research
Authors: Liu Lu
Published: December 2014

Themain content of the construction project cost management including costforecast, cost plan, cost control. Do cost forecast, cost control goal set,must be ahead of the labor, material, cost forecasting, construction scheme ofchange of the cost forecast and the prediction of auxiliary construction cost.Cost control should follow the principle of conservation and comprehensivecontrol, there are some effective ways to realize the cost control, forexample, take organizational measures to control the project cost, take technicalmeasures to control the project cost, to take economic measures to control theproject cost, strengthen quality management and control of rework rate, etc.
Design and Construction of Electronic Government Affair System Scheme
Authors: Wang Xiu Rong
Published: December 2014

E-government is a prerequisite for economic and social informatization. Information required from the various forces of a country, among them, the government as a national composition and the flow of information center "nodes", play a responsibility in the process of social informatization and irreplaceable role. In this paper, the design and construction of e-government system are discussed in this paper. Elaborated the e-government system basic architecture, the paper analyzes the electronic government affairs system overall design.