bluuebunny/crossref_metadata_2025 huggingface dataset:
Plastic Properties of Welds after Micro-Jet Cooling with Different Cooling Gases
Authors: Hadryś Damian , Piwnik Jan , Majewski Wojciech
Published: October 2014

New technology of micro-jet welding could be regarded as a new way to improve plastic properties of welds. The main purpose of that paper was analysing of plastic properties of welds made by MIG welding method with micro-jet cooling. The main reason of it was investigate possibilities of getting better plastic properties of welds made by MIG welding method with micro-jet cooling than plastic properties of welds made by ordinary welding method. It is possible for steel because higher amount of acicular ferrite (AF) in weld metal deposit (WMD) is obtained in MIG welding method with micro-jet cooling in relation to ordinary welding method (example: MIG welding method without micro-jet cooling). Moreover, it is possible to steering of weld structure and properties of the weld. During research Erichsen cupping tests and bending tests were carried out for welds made by MIG welding method with micro-jet cooling and ordinary welding method (MIG). Different kind of cooling gases were used to weld cooling. In this case comparison of plastic properties for different cooling gases was done. High amount of acicular ferrite influences positively on plastic properties. Higher values of plastic parameters were observed for welds made by MIG method with micro-jet cooling than for ordinary welding method. Different plastic properties were obtained for different cooling gases. In this research welds made by new method of welding (welding with micro-jet cooling) were compared witch welds made by ordinary welding method. New method of welding is very promising and capable of industrial application, mainly due to the significant improvement of weld properties and quality. That research was made only for steel welding with using MIG welding method. Another method of welding and another material were not tested. Other methods of welding have not been tested, but it is suspected that similar phenomena are taking place. Practical implications MIG method with micro-jet cooling it is way to get better plastic properties of welds in relation to welds made by ordinary welding method. It is very important because it could be used to steering of mechanical properties of welded constructions. This may have a positive impact on the parameters of the welding process (example: welding speed) and the quality of welded joints.
Simulating the Longitudinal Dynamics of a Tracked Vehicle
Authors: Alexa Octavian , Marinescu Marin , Truta Marian , Vilau Radu , Vinturis Valentin
Published: October 2014

The simulation procedure has always been considered as a giant leap forward, especially in the field of basic designing of a product. There is nothing new underneath the basic concept, but the scientific and technical progress always brings up new techniques that improve simulation in its whole.
When we talk about a vehicle, especially about a military one, we consider that it is much cheaper to simulate a process involving the weapon system than performing countless tests that are rather expensive. In this respect, we tried to develop a simulation mathematical model, check its accuracy with a set of extensive tests, prove it reliability and further extrapolate the behavior of the simulated model to a larger number of military vehicles of the same kind. It could help in various fields, such as diagnose (by comparing the simulated results with the real ones got from a faulty vehicle) or automatically regulating some functions (an intelligent vehicle, having an implemented, simulated model, that is able to feel the status of a subsystem in real time and regulate its behavior, accordingly).
Hence, the paper presents a model that simulates the longitudinal dynamics of a tracked vehicle. It has been issued using Simulink module of Matlab programming environment. It aims at pointing out the performances of the vehicle. The models interface is friendly and its structure is modular. The main modules of the model are the engine, the torque converter, the transmission and the track. The engine and the torque converter are modeled using the experimental maps obtained by the tests that have been previously developed by the manufacturer. The main principle of the equations that describe the system is to set a balance among the forces (both active and resistive) that load the vehicle. The inputs of the model are the technical and dimensional features, provided by the manufacturer or experimentally determined.
The output of the model is a dynamic behavior. Comparing the results with the experimental data eventually validates or invalidates the model. But the results were excellent, so the model was validated. Also, the results proved that the developed model is able to predict the performances of the take-off stage of the tracked vehicle.
Finite Elements Analysis of the Rail-Wheel Rolling Contact
Authors: Axinte Tiberiu
Published: October 2014

The railway transportation system is nowadays one of the most important systems for land transport because its increased load carrying capacity, high speed, low costs, connectivity and ecologic features. As a result, the railways are subjected to additional loads which produce a higher level of strains and stresses. The rolling contact of a wheel on a rail is the basis of many rail-wheel related problems including the rail corrugation, wear, plastic deformation, rotating interaction fatigue, thermo-elastic-plastic behavior in contact, fracture, creep, and vehicle dynamics vibration. Therefore, this topic became the research subject for many researchers worldwide. Practical experience shows that the stress distribution is an important factor at the rail-wheel contact interfaces, that is, two materials in contact at rolling interfaces which are highly influenced by the geometry of the contacting surfaces, material constants, loads and boundary conditions. Three different procedures have conventionally been utilized to inspect rail-wheel contacts including Hertzs theory and Kalkers analytical method. The calculation of these stresses becomes much more complicated in three dimensional real size geometries. For this reason, many scientists have simplified the problem mainly by means of theoretical or numerical approaches based on the Hertzs theory, which can be considered the starting point of all subsequent researches. Both static and dynamic contact stresses have been carefully examined. Accurate theories, as well as computer software have been developed to evaluate all the parameters which influence the rail-wheel interaction. The analytical equations were employed to calculate the Hertzian stresses using the Octave software. For these elements, the simplifying hypothesis was to consider only the elastic properties of materials and, consequently, to neglect the elastic-plastic characteristics. Besides, many models generally neglected the friction coefficient between the rail and wheel, which is one of the most critical factors in determining the precise amount of stresses and distribution of contact pressure in rail-wheel contact area. On the other hand, some practical methods have also been introduced to solve traditional problems related to rail-wheel interaction. Other original contribution of this research is to create a precise finite element model of a 3D rail-wheel, axle and pads in order to evaluate stresses, strains, and contact forces in this complex interaction system. However, unlike many previous works, this study focuses on the real conditions of the problem including exact boundary and loading conditions, using real-size complete model of various components with precise shapes.
Breaking Process Modeling Using FEM – Proposition of a Method for Identification of Material Data and for Identification Features Job Contact
Authors: Mańkowski Jarosław
Published: October 2014

Brittle materials belong to the group of brittle materials with a very complex structure. As heterogeneous and anisotropic materials, are randomly distributed discontinuity structures such as scratches, cracks, pores. One of the problems, which often occurs during the analysis, is to identify the properties of materials data and identify the characteristics of the impact of the tool on a brittle material. This paper presents a method of identification of material parameters and a method of modelling the contact problems for limestone Morawica. Tests and analyzes were performed for a roller compression test. Very good convergence of the results of analysis and of the results of an experiment performed on a real object was obtained.
Computer Aided Analysis of Systems with MFC Actuators
Authors: Płaczek Marek
Published: October 2014

Work presents an analysis and computer aided simulation of one-dimensional vibrating system with advanced piezoelectric transducer used as vibration actuator. A Macro Fiber Composite (MFC) transducer is used in order to excite vibration of the system. The mechanical subsystem is a cantilever bending beam made of steel. The MFC transducer is bonded to the beams surface. Analytical calculations are based on an approximate Galerkin method. The computer aided simulation and analysis of the considered system was carried out using Siemens NX software.
Simulation of Mechanical Characteristics of the Integrated Drive Systems
Authors: Constantinescu Alexandru
Published: October 2014

The characterization, modeling and the simulation of the mechanical processes represent components of the analysis process of the systems, representing the tools that allows the analysis, the detection and easier identification of the problems and the solutions. The action of the the mechanical systems with "pneumatic engines" shall be detailed in the article, the characteristics and the evolution of these engines as they are integrated in the various systems. The simulation of the mechanical systems use complex programs, specialized, programs that consider a lot of factors to determine the most precisely behavior and the evolution of the analyzed system. The results of the simulation and the prospection of the specific documentation shall be specified in the article, as well as identifying these "pneumatic engines" purposes and their limits.
Multibody System Software Used for Research of Car Suspension System Dynamics
Authors: Konieczny Łukasz , Burdzik Rafał , Folęga Piotr
Published: October 2014

The paper presents results of investigation of car suspension system dynamics. In this research the multibody (Multi Body System - MBS) system software MSC.Adams was used. ADAMS software (MSC.Software) is a commercial software to build a multibody structural models. Modular design allows for the usage of applications with different focuses, such as rail, aviation and motor vehicles. Models with a large number of freedom degrees of the components are built with mass concentrated on the assumption that the system is composed of a rigid (or deformable) bodies combined in a specific way (connection spherical, sliding, rotary), moving under the action of the forces and moments of different types (concentrated or distributed forces, the forces of contact). The complex multibody systems are automatically generated by the Lagrange equations of motion of the second kind in absolute coordinates. Integral procedures used to solve the differential-algebraic equations include multistep algorithms with variable row and a variable-and fixed-step and one-step algorithms. The Adams/Car module enables building and simulation-based examination of individual car subsystems such as, for instance, the suspension, steering or driving system as well as their combinations forming a complete car. The programme contains an extensive library of structural solutions applied in cars. The geometry and relationship data of individual components are stored in libraries, and software operation on a standard user level can be brought down to defining positions of constraints in space. The software is compatible with various CAD programmes, thus enabling import of elements created in other applications. The study was conducted for the vehicle model of Fiat Seicento. The examined system of the complete vehicle consists of 49 kinematic degrees of freedom. The article examined the impact of chosen parameters on vehicle vibration in an Adams Car Ride. Used in simulation Adams/Car /Ride module allows to test vehicle dynamics forcing the position of the plate of test stand . Virtual model of the vehicle is set on four servo-motors. They can control any excitation combination of individual actuators (dispalcement and amplitude, phase between extortion, etc.) and determine all kinds of vibration (vertical, lateral, angular). The study was conducted for selected parameters of the test rig.
Interaction of the Decision Maker in the Process of Production Scheduling
Authors: Kalinowski Krzysztof , Grabowik Cezary , Paprocka Iwona , Kempa Wojciech
Published: October 2014

In the paper the role of the decision maker in the process of production scheduling is discussed. A general procedure specifying the activities carried out within the framework of particular steps of scheduling is shown. The scope of the interactions of the decision maker in the scheduling process under conditions of real time system is commented. The purpose of this work is to present a range of knowledge and information which should have a decision maker and also the advantages and disadvantages of each method of participation. The work in this area is one of the most important steps when designing a new, dedicated scheduling system as well as during the analysis, selection and adaptation of an external one.
The Expert System Supporting Design of the Manufacturing Information Acquisition System (MIAS) for Production Management
Authors: Ćwikła Grzegorz , Sękala Agnieszka , Woźniak Marcin
Published: October 2014

This paper describes the expert system created to support development of Manufacturing Information Acquisition System (MIAS) for any company, regardless of companys technological processes characteristics. Proper acquisition of data describing the state of the production processes is crucial in the management of a company, because real-time information is a base for decision making and achieving operational excellence. Information on the state of production system have to be automatically acquired from various sources, pre-processed and made available for higher-layers IT systems (MES, ERP). One of the stages of development of MIAS is the synthesis of technical and organizational solutions responsible for the acquisition of various types of data. In order to support designers an expert system MIAS Advisor has been developed, supporting the choice of methods and technical means for the acquisition of data on various aspects of the operation of a company. The algorithm of the expert system operation, which allows easy updating of a set of rules of the system has been presented.
Optimization of the Lean Production Process Using the Virtual Manufacturing Cell
Authors: Sękala Agnieszka , Gwiazda Aleksander , Monica Zbigniew , Banaś Wacław
Published: October 2014

The most important element of the production process is the optimization of the conducted operations. It is particularly important for the lean production process. In the paper is presented the analysis of the optimization approach using the CAE systems, the multi-agents systems (MAS) and the distributed robotics (DR) systems. Using the CAE techniques it is possible to elaborate the virtual environment in which the manufacturing cell is designed. The interaction between the virtual model and the process rule base allow improving the design of the existing standard machining technology. The MAS approach let to create the structure of the manufacturing process, taking into account both the machining stands and transport units according to the elaborate technological process. Finally the utilization of the DR approach for the optimization of transport operations including the heuristic algorithms. Moreover in the paper are presented the results of the investigations of analyzed problem on the base of complex production line for the cylindrical elements. The simulations and other analysis have been conducted in advanced computer systems. Also the basic relation between mentioned systems are discussed.
Experimental Investigation to Evaluate the Optimum Performance of Helical Coiled Tube with Insert and Nano-Fluid
Authors: Qasim Saleh Mahdi , Fattah Sahar A. , Jassim Osama M.
Published: October 2014

In the present work an experimental investigation is carried out to evaluate the performance of helical coiled tube with the swirl flow device using Al2O3nanofluid.The effects of wire coil insert with different parameter on heat transfer and friction loss in the helical tube were examined with Dean number (De) ranging from 700 to 2000. The circular or square coil wire has different cross sections, insertedin the tube with different pitch. The wire coil with Al2O3 nanoparticles with a diameter of 80nm dispersed in distilled water with volume concentrations of (0.08,0.1, 0.2and 0.3 vol.% ) were used as the test fluid. The effects of Dean Number, volume concentration of suspended nanoparticles, and wire coil on heat characteristics were investigated. The results reveal that the use of tabulators leads to a considerable increase in heat transfer and friction loss over those of a smooth tube. The Nusselt number increases with increasing of Dean number and reduction in pitch of wire coil. The square type of wire coil provides slightly higher heat transfer than the circular under the same conditions. Results show that the optimum heat transfer is caused of P=15mm of wire coils. Adding nanoparticles to the base fluid causes a significant enhancement in heat transfer characteristics. The overall enhancement in heat transfer using two mechanisms simultaneously compared to using pure fluid within the smooth helical tube exceeds over 213.2% (180% spring enhancement +33.2%Al2O3). The optimum results were found to be P=15mm, φ=0. 3Al2O3 t=2mm square cross section and De=1889. Finally, empirical correlations are developed of predicting Nusselt number of the flow with and without nanofluid. Comparison between the present result in reference results show good agreement.
Structural Safety Assessment of a 1100 TEU Container Ship, Based on a Enhanced Long Term Fatigue Analysis
Authors: Domnisoru Leonard , Rubanenco Ionica , Amoraritei Mihaela
Published: October 2014

This paper is focused on an enhanced integrated method for structural safety assessment of maritime ships under extreme random wave loads. In this study is considered an 1100 TEU container test ship, with speed range 0 to 18 knots. The most comprehensive criteria for ships structural safety evaluation over the whole exploitation life is based on the long term ship structures analysis, that includes: stress hot-spots evaluation by 3D/1D-FEM hull models, computation of short term ship dynamic response induced by irregular waves, long term fatigue structure assessment. The analysis is enhanced by taking into account the ships speed influence on hydroelastic response. The study includes a comparative analysis on two scenarios for the correlation between the ships speed and waves intensity. The standard constant ship speed scenario and CENTEC scenario, with total speed loss at extreme waves condition, are considered. Instead of 20 years ship exploitation life estimated by classification societies rules from the long term structural safety criteria, the enhanced method has predicted more restrictive values of 14.4-15.7 years. The numerical analyses are based on own software and user subroutines. The study made possible to have a more realistic approach of ships structural strength assessment, for elastic and faster ships as container carriers, in compare to the standard one based only on naval rules, delivering a method with higher confidence in the designed structural safety.
Microstructure and Mechanical Tests of AlNiMnZnCu High Entropy Alloys
Authors: Florea Iulia , Buluc Gheorghe , Comaneci Radu , Baltatescu Oana , Cimpoeşu Nicanor , Carcea Ioan
Published: October 2014

High entropy alloys (HEAs) are a newly developed family of multi-component alloys composed of several major alloying elements, such as copper, nickel, aluminum, cobalt, chromium, iron, silicon, titanium, etc. The fact that HEA alloys is formed participation molar is approximately equal with at least five elements, entropy configuration is double that of binary systems, entitles us to call them "high entropy alloys'. Recent studies suggested that the refractory HEAs exhibited great promise for high temperature structural materials. This alloy can be processed and analyzed as an ordinary material AlNiMnZnCu high-entropy alloys are prepared by an induction furnace. The microstructure and properties of alloy samples were examined by SEM and testing machine for obtained materials. Mechanical tests were made with a INSTRON 3382 machine.
Study of Maritime - Road Intermodality in Constanta Port by Evaluating Trips Generation/Attraction Potentials
Authors: Ilie Sorin , Mitran Gabriela
Published: October 2014

The changes increasingly accentuated in recent years in the global economy, in the context of globalization, have created an environment in which transport sector must adapt continuously. This adaptation process acts especially at intercontinental level, involving that transport and distribution of goods and raw materials on long distances to be as efficient in terms of duration and costs of transport and, at the same time, with reduced negative implications on the environment. The achievement of transport processes, in equilibrium conditions between demand and supply, in relation to limitations mentioned above, is possible by promoting intermodal transport, which requires a very good connection between continental modes (road and rail transport) and shipping. According to European Commission, about 90% of total import / export trades at the level of European Union are done by maritime transport. This paper aims at identifying potentials of generation / attraction of travels made on road transport at the level of intermodal node represented by seaport of Constanta. These trips generation / attraction potentials may be further used as input data in dimensioning processes of intermodal logistics facilities (handling, storage and internal transport) between road and sea transport modes. In the frame of the study are processed and analyzed data obtained through origin - destination surveys conducted during general traffic census carried out in 2010, on the network of European, national and county roads of Romania. Also, were processed data regarding types and volumes of goods transited through this port in the period 2005-2010, and the types of ships used to load these goods. Statistically analyzing these two types of data, it was revealed that grain represents 34% and petroleum products 57% of all goods (in terms of weight) handled in the seaport of Constanta, and also that the continental transport mode predominantly used to move these categories of goods is road transport. The results of performed analyzes, that describe the current situation regarding the trade flows in the port unit, constitute the starting point in traffic modeling for the purpose of freight transport planning at future time moments. Models for traffic estimation in ports take into account the predictions about economic development in influence area on short, medium and long terms.
RFID Loop Tags for Merchandise Identification Onboard Ships
Authors: Deacu Daniela
Published: October 2014

Radio frequency identification (RFID) is one of the most actual techniques employed to control the circuit of merchandises, as an alternative to the classical barecode. RFID tags should be cheap and easy to reproduct on a multitude of dielectric supports. There are several types of RFID systems, depending on whether tag and/or reader are active or passive. For cost reasons, merchandise identification should use active reader and passive tag, as the latter might be manufactured on a cheap FR4 support or printed directly on paper, by using a conductive ink. Passive tags can be shaped as straight dipoles, meandered dipoles, or loops. When a small area is required, loops are more appropriated. Codes are made different one from another by using on the same tag antennas with different resonance frequencies. Another advantage of loops is that they can be placed one inside other, so the occupied area is even smaller compared to other multi-resonant tags. Firstly, a single loop is analyzed, in order to model the resonant behaviour, correlated to the loop geometry and size. Open and closed loops are studied; the lowest resonance frequency for a given loop length is achieved for the open loop. In that case, the loop is resonating as a dipole. Next, a tag with three concentric loops is investigated. Separately, a small loop is used on the tag, in order to couple the received power in a resistor. When the tag is close to the reader, the latter is triggered if power is absorbed simultaneously on the three expected frequencies. The proposed tag was simulated and manufactured. Results show a good agreement between measured and simulated data. Finally, a block diagram for the reader was proposed.
On the Accuracy of a Method of Moments Approach for Displacement Decomposition into Elementary Movements
Authors: Dumitrascu Ana , Tamas Razvan , Dragulinescu Marin
Published: October 2014

In a previous work, we proposed a Method of Moments (MoM) approach for decomposition of a complex displacement into elementary movements. We found a good agreement between our results, based on application of the proposed approach on data from an inertial navigation system, and the results obtained by simply integrating the instantaneous acceleration. In this paper, we assess the accuracy of our method, in order to evaluate the impact of the number of the basis functions.
Computer Aided Design and Analysis of Composite Structure
Authors: Majzner Michał , Baier Andrzej
Published: October 2014

Feature is one of the methods for representing objects from which are representing components, products and processes. This article presents methods for integration of features of methods in modeling and analysis of composite structural components. The aim of the research is to develop methods for verification and validation of composite layered structure, distinguishing components of the individual layers and identify the relationship between them. By applying the method of features it is possible to determine the structure of the composite fit to the requirements of design and construction. Proposed new types of feature, which allows the creation of object-oriented structures of composite components.
A New MSLBOLSR Routing Algorithm
Authors: Zhang Hong , Hu Jun , You Lei
Published: October 2014

In Optimized Link State Routing Protocol, the choice of Multi-Point Relays is based on connectivity. Based on the connection time, this paper chooses MPR by taking reference in the degree of congestion of link layer of nodes while making a balanced processing of network load. The experimental results have shown that the improved MSLBOLSR(Multidimensional Sense and Load Balanced OLSR) protocol has advanced visibly in terms of the leisure degree of application layer and the time-delay, etc.
A Novel Model for Human Activity Representation and Classification Based on Trajectory
Authors: Zhu Wei Xing , Xu Wei Guang , Hou Guo Lin , You Jun
Published: October 2014

In this paper, a novel model, HDP-HMM-SCFG is proposed for representing and classifying activities based on motion trajectories. In the model, activities are represented by stochastic grammar using trajectory, where trajectory segments are considered as observations emitted by the grammar terminals attached with HMMs. Then, by replacing the Euclidian distance in the kernel function of Gaussian radial radix with EMD-DTW, which is proposed to measure the distance between two trajectories by integrating the pros. of both EMD and DTW, multi-class SVM classifier is constructed. Experiments on ASL dataset are carried on to validate our approach.
A Virtual Machine Migration Algorithm Based on Network Flow Balance
Authors: Yang Yu , Zhou Hua , Liu Jun Hui , Feng Yun
Published: October 2014

Current research of virtual machine migration strategy mainly focuses on how to reduce the delay of virtual machine migration process but does not pay much attention to the network flow problem caused by the virtual machine migration. Because of the difference caused by Infrastructure Operator's network location makes a different virtual machine migration strategy, which will result in large differences in network traffic. Infrastructure operator's network resources are scarce resources. Therefore, how to reduce the network flow of virtual machine migration is a problem to be studied. In order to reduce network traffic virtual machine migration, this paper proposes a virtual machine migration algorithm (NFBA) based on network flow balance to obtain the minimum scheduling cost. Experimental results show the migration strategy can effectively reduce the communication traffic between the virtual machine clusters within the system and reduce the burden of network and consider workload balance at the same time.
Application of Synchronization Controlling for the Unified Chaos System in Secure Communication
Authors: Yu Bin , Liu An , Jia Ya Qiong
Published: October 2014

The linear feedback synchronization of the unified chaos system was researched, which was applied in the secure communication based on the chaotic parameter modulation. Information signals were used to modulate some parameter of the unified chaotic system in the sending terminal, and in the receiving terminal the chaotic content was then obtained based on the chaotic synchronization signal, then the information signals recover effectively. The simulation results show that the synchronization time is very short and the recovered signals are close to the information signals and it can realize secret communication successfully, having strong security and practicability.
Application of Wireless Sensors in Underground Mine Communication Operation
Authors: Lu Zhi
Published: October 2014

As information technology and communication technology continue to evolve and progress, wireless sensors in communication operations have been widely used in many areas , which has greatly improved the effectiveness and quality of communication and created favorable conditions for the development of all work. In this paper, the author analyzes the corresponding concept of underground mine communication practices and wireless sensors, focuses to discuss the application of wireless sensors in underground mine communication operations and analyzes the design of underground mine wireless sensing system, whose purpose is to provide reference for the application of wireless sensors in underground mine communication operations.
Study on Mechanical Properties and Mechanism of Sisal Fiber Cement Mortar
Authors: Lv Feng , He Zi Ye , He Xiao Ming , Qian Jun Yi , Liu Ding
Published: October 2014

This paper comparatively study on fluidity, flexural strength, compressive strength and other mechanical properties of sisal fiber cement mortar and the base mortar. The results show that fluidity of sisal fiber makes sisal fiber cement mortar than that of the base group decreased about by 11.1%;When sisal fiber content is 4.5 kg/m3, water reducing agent is 2.78 kg/m3, the best mixing proportion of sisal fiber cement mortar for water: glue: sand = 0.45:1.:2.5, flexural strength improved by 52.4%, 54.3%, 20.1% respectively, compressive strength increased by-1.5%, 6.5% and-2.1%.And analyzed the mechanism of flexural and compressive from the chemistry of sisal fiber and cement.
Design and Application of a Communication System Based on Codesys
Authors: Liu Jia , Fu Wei Ping , Zhou Lei , Qie Na , Wang Wen Yun
Published: October 2014

A model of wireless network data interchange was built to solve cross-platform exchange data in intelligent robot. In the framework of embedded Soft-PLC - Codesys real-time operating system, we apply Socket network programming technology based on TCP/IP communication protocol to set up a physical channel between VC++ platform and the Codesys platform. It realizes the real-time data exchange between host-computer and slave-computer uploaded embedded operation system of robot. A special multi-threaded processing class was developed to enhance the multi-tasking allocation ability of the system. Exchanged data was packaged and analyzed to ensure the accuracy of transmitted data. The experiment shows built communication system platform is justifiable, and data transmission speed is less than 10ms. It is able to meet the needs of real-time control in intelligent robot.
Design and Implementation of Mobile Learning Terminal Platform of Network Course Based on Android
Authors: Dong Chong Jie
Published: October 2014

Based on the analysis of mobile learning, with web technology application network course in computer application technology of Dongguan Polytechnic as an example, design and implementation of mobile learning terminal platform of network course based on Android ,states the whole process of analyzing, design and implementation of this system. This system supports network course of m-learning by developing Android application program, which offers a new way of actualization of network course and has practical and popularizing value.
Detrended Fluctuation Analysis of Heart Rate Variability in Noise Exposure
Authors: Chen Shih Tsung , Tseng Li Ho , Lee Yuan Po , Wu Hong Zhun , Chou Chia Yi
Published: October 2014

During the past two decades, most studies have employed questionnaires to characterize the effects of noise on behavior and health. Developments in physiological techniques have provided a noninvasive method for recording cardiovascular autonomic activity by using an electrocardiogram (ECG). We investigated cardiovascular activity changes in exposure to exposure to low-frequency noise for various noise intensities by using detrended fluctuation analysis (DFA) of heart rate variability (HRV). We hypothesized that distinct noise intensities would affect cardiovascular activity, which would be reflected in the HRV and DFA parameters. A total of 17 healthy volunteers participated in this study. The test intensities of noises were no noise, 70-dBC, 80-dBC, and 90-dBC. Each noise was sustained for 5 minutes and the ECG was recorded simultaneously. The cardiovascular responses were evaluated using DFA of the beat-to-beat (RR) intervals obtained from ECG signals. The results showed that the mean RR intervals variability and mean blood pressure did not substantially change relative to the noises. However, the short-term scaling exponent (α1) of the DFA of the background noise (no noise) condition was lower than the 70-dBC, 80-dBC and 90-dBC noises (P< 0.05, repeated measures analysis of variance). The α1of 90-dBC noise was significantly higher than the α1of BN condition according to a Mann–Whitney U test (P< 0.01). We concluded that exposure to low-frequency noise significantly affects the temporal correlations of HRV, but it does not influence RR intervals variability.
Extracting Foreground Based on Codebook for Early Forest Smoke Video
Authors: Wu Dong Mei , Zhou Xin
Published: October 2014

Shaking leaves has been the biggest interference for early forest smoke video detection. Moving average method, Gaussian mixture method and its improved methods are often used to update background, but the performance is not good through background subtraction. Codebook algorithm is applied to extract foreground for early forest smoke detection, quantization techniques are used to obtain background model from time series, then getting foreground image through background subtraction. Through multiple video tests, the experimental results that the filtering performance, anti-noise performance and accuracy are better than other methods above.
Study on Preparation and Properties of Foam Rubber from Natural Rubber Ribbed Smoked Sheet Using Salt of Amino Alcohol and Carbonic Acid as Foaming Agent
Authors: Sritapunya Thritima
Published: October 2014

This work was a study of the preparation and properties of foam rubber from natural rubber ribbed smoked sheet 3 (RSS3) using synthesized salt of amino alcohol and carbonic acid as foaming agent. The synthesised salts were varied in the amount of 0.25, 0.4, 0.6, 0.8, 1, 3 and 5 phr to compare with 0.4 phr of the commercial foaming agent (azodicarbonamide). The foam rubbers prepared through conventional vulcanization with sulfur were compounded by using a two-roll mill and formed into cylinder by a compression molding machine at 170°C for 7 min. The specimens were characterized including compressive stress, shape deformation and cellular morphology. SEM micrographs showed that the pore or cell content in foam rubber is higher with increasing the amount of salt while cell shape is bigger and more shapeless. However, cell distribution is constancy for all conditions. For the mechanical properties, the compressive stress of foam rubber increases with incresing the salt up to 1 phr and then decreases as well as porosity increases. Whereas, the dimension of all foam rubbers is shrunk over time. Therefore, this study indicated that the synthesized salt of amino alcohol and carbonic acid could create the cells into rubber and provided the size and shape of cell and the good mechanical properties competitive with commercial foaming agent.
Face Recognition Based on Eigenface Image Reconstruction and Fisherface
Authors: Lu Xiao Long , Yang Le , Cai Gang , Mo Zi Xing , Peng Li
Published: October 2014

In this paper, a new face recognition method based on eigenface image reconstruction and Fisherface is proposed, it is mainly used to reduce the loss of personal characteristics. First, we can obtain the feature subspace of all the classes in training set by using the inner-classes covariance matrix as generating matrix, and so we get the eigenfaces of each person (class). Next, we use the principal component of testing set, which is obtained by mapping testing set to the feature subspace, to reconstruct the testing images. Finally, we substitute the reconstructed testing images for the original ones, and then get the recognition work completed by using Fisherface method. The simulation illustrates the effectivity of the method on the ORL face database.
Free Cooling in High Heat Density Data Centers
Authors: Ge Chang Rong , Zheng Xian Qing
Published: October 2014

Data centers comprised of racks and corresponding servers form the backbone of today’s cloud computing. Continuous operation of large numbers of servers can generate large amounts of heat which in turn requires high capacity cooling systems. These cooling systems can consume a significant portion of the energy required to run a data center and can negatively impact data center efficiency. With increasing operational costs, the data center industry has started to actively search for efficiency improvements to slow down the rising cost of running services. One of the most prominent ways to cut power consumption is free cooling, which uses outside air for cooling IT equipment completely or part of the time. This system is often used in colder climates and requires less energy since it doesn’t use compressors for cooling incoming air. This paper presents an evaluation of Shanghai as a data center location. As temperature affects data center cooling consumption, focus of the paper is on evaluating optimal operating conditions for local data centers.
Improved XCS in Classification Problems
Authors: Li Xin , Tao Hua Min , Wu Dong Ya
Published: October 2014

The paper presents the first results of the Improved XCS in classification problems. We classify the classifiers into certain-right classifiers, certain-wrong classifiers and uncertain classifiers, and then analyze the difference between certain and uncertain classifiers. A new classifier attribute at is presented which denotes the ascending times of prediction error, the bad condition set is used to improve the robustness of the system. Several experiment results on binary and integral classification problems demonstrate the superior performance of the Improved XCS.
Synthesis and Effect of DCCA on the Ambient Pressure Dried, TEOS-Based Silica Aerogel
Authors: He Song , Cheng Xu Dong , Bi Hai Jiang , Yang Hui
Published: October 2014

In this paper, we report the experimental results on the synthesis of low-density tetraethoxysilane (TEOS)-based silica aerogels prepared under ambient pressure. The drying control chemical additive N, N-Dimethylformamide (DMF) was introduced to the experiments. Before dring, the water within alcogel was exchanged with ethanol and n-hexane. Trimethylchlorosilane (TMCS) was used to modify the hydrophilic gel surface to make sure the final aerogel is hydrophobic. The effects of solvent EtOH and DMF on the properties of the resulting aerogels were investigated. The microstructure, morphology and other properties of the aerogels were studied by FT-IR, TEM and BET measurement. The resulting aerogels have a well-developed mesoporous structure (mean pore size of ~15 nm) with low density (0.08g/cm3), a high specific surface area (1267m2/g) super hydrophobicity (Ө=165o) and high transmissivity (~90%).
Bioactivities of Mimosa pudica and Phyllanthus niruri Crude Extracts Collected from the Locality of Chaiyaphum, Thailand
Authors: Chimsook Thitiphan
Published: October 2014

Mimosa pudicaandPhyllanthus niruriwere used as the traditional medicines in Thailand. Both plants were very useful for various pharmacological and biological activities. In the present study, the bioactivities ofMimosa pudicaandPhyllanthus niruriextracts were investigated. The amounts of total phenolic compounds were analyzed using gallic acid as standard compound and the antioxidant activities were evaluated using ABTS assay. The phenolic content ofMimosa pudicaextracts revealed that AEE1 contained the maximum phenolic content and that ofPhyllanthus niruriextracts exhibited the same result of maximum phenolic content in AEE2. The antioxidant activity were performed and found that WE1 fromMimosa pudicaand WE2 fromPhyllanthus niruriexhibited prominent ABTS radical scavenging activities. Interestingly, AEE1, AEE2 and EAE2 specifically exhibited the high cytotoxicity against the colon cancer cell line (SE620).
Matching Research of Binary Image Based on Canny Operator and SIFT Algorithm
Authors: Qi You Jie , Zhu En
Published: October 2014

A matching method based on Canny operator and SIFT algorithm for binary image is proposed. The Canny operator was applied on source image to detect edge and generate binary image. SIFT algorithm was used to match and recognize the binary images. The results of experiment show that the method we proposed ,under the premise of exact recognition, not only hold the great mass of key information, but also reduce the volume of data in source image. This method has good application prospects in massive image search ,terrain matching and so on.
Numerical Studies of X Band AbFSS Antenna Radome
Authors: Wu Wei Wei , Zhou Yang , Xie Shao Yi , Chen Xi , Yuan Nai Chang
Published: October 2014

In this paper, we describes a novel periodical electromagnetic structure. This hybrid structure consists of an absorber layer and a frequency selective surface (FSS) layer, so-called AbFSS structure. These two layers share one dielectric substrate. The absorber layer works at K band and the FSS layer performs at X band. The unit of this structure is numerically studied. A design procedure is developed after this study. Then an AbFSS antenna radome is modelled and applied to a 2x2 microstrip patch array. The characteristics of the array with and without this novel radome are researched. The characteristics include antenna gain and monostatic RCS. The comparisons of these characteristics of the array with and without the radome demonstrate that this radome is transparent at X band and absorptive at K band. This AbFSS structure can be easily achieved in Engineering and be a good candidate for the antenna radome.
On the Comparison and Design of Computer-Aided Translation Software
Authors: Kang Xiao Yun
Published: October 2014

With the development of computer technology, computer-aided translation software is widely applied to translation. It is able to improve translation efficiency and quality. Meanwhile, it is in accordance with the requirement of market-oriented translation workshop. The paper compares the strengths and weaknesses of the major computer-aided translation software, which provides the software consumers with practical suggestion. The design principle is also discussed in the paper to facilitate the design of satisfactory computer-aided translation software to the users.
Optimal Deployment Based on Tree in Multilayer Mobile Sensor Network
Authors: Zeng Xia Ling , Zhang Lin
Published: October 2014

In sensor networks, a reasonable distribution of sensor nodes is an important role for the improvement of sensor ability, information collection ability and network survival. For multilayer mobile sensor network, a tree-based deployment optimization scheme was proposed and better sensor coverage could be achieved by topology adjustment utilizing mobility of sensor node. Sink nodes complete mobile positioning of S nodes based on rectangle division method and bounding box algorithm, and achieve the distribution optimization of S nodes by establishing extending-tree of Sink node as the center. Results show that the location error ratio reduces with the increase of Sink nodes. Compared with initial random deployment network, the network coverage ratio after optimal deployment significantly enhances, which effectively improve the coverage sensor range of overall network.
Oscillation Criteria of First Order Nonlinear Neutral Differential Equations
Authors: Xu Ji Jun
Published: October 2014

A class of general nonlinear neutral differential equations for its special cases are discussed. sufficient conditionsfor all solutionsof the equations to be oscillatory are obtained. It can be treated in the extreme limite theorem.
Synthesis of Zeolite from Blast Furnace Slag Using Alkali Fusion with Addition of EDTA
Authors: Wajima Takaaki
Published: October 2014

A large amount of blast furnace slag, a by-product of the iron-making process, is generated annually. We attempted to convert blast furnace slag (BFS) into zeolitic materials using alkali fusion with ethylenediamine tetraacetate dihydrate (EDTA) chelation. Without addition of EDTA, a mixture of hydroxysodalite and calcite was synthesized. With EDTA addition, Ca2+ ions were trapped by chelation in solution during agitation, then the chelation was promoted by heating at synthesis, and zeolite-A, zeolite-X and hydroxysodalite were synthesized.
Redundant Feature Selection Methods in Text Classification
Authors: Chen Su Fen
Published: October 2014

Feature selection is an effective pre-processing technology to facilitate text mining on high dimensional feature space. In recent years, many effective redundant feature selection methods have been proposed from different motivations. However, a comparative experimental study on redundant feature selection methods in the field of text mining has not been reported yet. In order to solve this problem, an extensive empirical comparative study with the task of text classification is given in the paper. The experimental results indicate that the 3-way Mutual Information represents the redundancy much better than traditional 2-way Mutual Information, since the label information are considered by 3-way Mutual Information. As a result, the performances of redundant feature selection methods based on 3-way Mutual Information overwhelm other methods.