bluuebunny/crossref_metadata_2025 huggingface dataset:
A Rapid Design System Integrated CBR with Variant Design
Authors: Niu Qin Zhou , Song Yan Fang
Published: August 2014

In the machine tool manufacturing industry, most of the design is based on previous experience and cases. However, some parts in the machine are complex and hard to modify for reuse. In this paper, CBR integrated with variant design is proposed to accelerate the knowledge reuse process. The experience and the cases are saved in the case base, and the similarity of the cases includes the parameters and structure. The revise process is using the proposed variant design to modify the case, and we mainly talking about the process on the construction of the functional relationship, which is the key steps of the variant design. Finally, we build a rapid design system for milling machine. The application indicate that the approach for complex parts design are useful and promising in intelligent design process in terms of shorter design time and more intelligent process.
A Retrieval Method for Failure Mode Based on Semantic
Authors: Lei Zhi Ming , Wang Zi Li , Ren Yi , Liu Lin Lin
Published: August 2014

According to the characteristics of domain knowledge,a method for the determination of domain sememe is given,and a rule for the description of the domain semantic item is also given.Then,the method and the rule are applied to the failure domain.The model of semantic force is given in the process of semantic retrieval ,and the method for the calculation of semantic force is given.The method for the generation of the theme of failure mode is given.A retrieval method for failure mode based on semantic is given,and there is an example to prove its effectiveness.
Kinematics Analysis of a Hot-Line Live Working Manipulator
Authors: Ma Xiao Lin , Chai Hui , Li Yun Jiang
Published: August 2014

This paper introduces the development of hot-line live working manipulators and gives a new configuration manipulator driven by hydraulic actuator firstly. Then, its forward kinematics equations are derived with homogenous transformation method. Finally, the analytical solutions of its inverse kinematics are solved under the condition that the posture of the end-effector is known and given with z-y-z Euler angles.
An Inspection Method of SMD Component Type Based on Moment Features and BP Neural Network
Authors: Wang Zu Jin , Huang Xiao Diao , Gu Ping Ping
Published: August 2014

The type inspection of surface mounted devices (SMD) components is an important part of the numerical control (NC) placement machine’s vision system. In order to improve the detection speed, accuracy rate and versatility, a detection method based on moment features and neural network is proposed. Firstly, component images are preprocessed in order to eliminate the influence of non-uniform illumination and simplify the calculation, so component lead images can be obtained, and then seven invariant moments and a zero-order Zernike moment of the lead images are extracted. Next, the moment features are corrected and normalized. Finally, back propagation (BP) neural network based on the Levenberg-Marquardt algorithm is taken as a classifier for training and testing the 8-dimensional mixed moment feature vectors, 0 and 1 are used to represent the degree of belonging of each image. The experimental results show that this method doesn’t need complex lighting system and has good versatility, and the correct rate can be up to 100%.
Certain Question Research on Nonlinear Finite Element Analysis of High Arch Dam
Authors: Wang Zhi Qiang , Zheng Ke Hong
Published: August 2014

The nonlinear finite element can precisely simulate practical work condition of arch dam, but also has some problems in the safety evaluation of high arch dam, mainly in different mesh size, different strength criteria and constitutive relations of dam corresponding to different results. This article first proposes determining method for reasonable mesh size describes three strength criterions of uniaxial, biaxial, triaxial, gives two constitutive relations of dam cracking, damage. Take a high arch dam as an example, has done some research on the above question, obtain some beneficial conclusions.
Co-Processing Strategies for Feature Detecting in Smart Video Sensor
Authors: Zhu Yu , Mei Shun Liang , Le Jian
Published: August 2014

To assist man who is blind or visually impaired on the navigation, a vision system depending upon the DM3730 as the core is developed, which can provide accurate information regarding the environment surrounding the patients. As one part of the project, the feature detection module must be suitable for an embedded implementation, hardware parallelisms and algorithmic modifications need. The Harris detection is chosen as the main algorithm of this module. The experimental results show that the precision and speed of feature extraction are both better than of the PC platform.
Researches on Software Cost Combined Estimation Based on RBF Neural Network and RVM
Authors: Zhang Tong , Zhang Min Fang , Zhang Hua , Hu Yu Qing
Published: August 2014

Under the precondition of relatively adequate historical sample data of obtainable software cost, the thesis makes comprehensive analysis of the advantages and disadvantages of complementary neural network and vector machines, and attempts to study the software cost combined estimation based on RBF neural network and RVM and to build combined estimation model, then applies the entropy evaluation method to identify the weight coefficient of this combined estimation model, and finally it adopts the data from COCOMO database to verify this combined estimation as well as the rationality and scientificity of this model.
Multi-Template Processing of Fingerprint Recognition Algorithm
Authors: Zou Lian Ying , Zhou Ying , Dong Xiang , Chen Yu
Published: August 2014

Using multi-template processing algorithm, the fingerprint features are accurately collected. Through normalization, make the black and white point contrast of the fingerprint image more obviously, strengthen the ridge line texture. Direction calculating algorithm is based on the grey value of the neighborhood pixels. It can be implemented simply and speedily. Through direction filter, noises can be removed, and the contrast of the fingerprint’s ridge lines and valley lines can be enhanced. After binary converting, all information of the fingerprint is stored with 0 and 1. The effect of thinning is to make the fingerprint image more distinct to extract the fingerprint feature point easily. These steps had been implemented on Altera DE2 board with HDL codes. The experimental results indicate that the multi-template algorithm of fingerprint image processing is correct and practicable.
An Improved TLBO Algorithm for Balancing Stochastic Two-Sided Assembly Line
Authors: Li Da Shuang , Zhang Chao Yong , Shao Xin Yu , Xie Zhan Peng
Published: August 2014

The stochastic two-sided assembly line is a special line in which workers perform assembly tasks in both sides of the line and the task time is not deterministic. In the improved teaching-learning-based optimization (ITLBO) algorithm, teacher and learner phases are modified for the discrete problem, a novel merging method is proposed to construct the new evolutionary population and Late Acceptance Hill-Climbing (LAHC) is integrated into the self-learning phase to obtain high quality solutions. The experimental results validate the effectiveness of the proposed algorithm.
Modified UCT Algorithm with Risk Dominance Methods in Imperfect Information Game
Authors: Zhang Jia Jia , Wang Xuan , Yao Lin , Li Jing Peng , Shen Xue Dong
Published: August 2014

UCT (Upper confidential bounds on Trees) has been applied quite well as a selection approach in MCTS(Monte Carlo Tree Search) in imperfect information games like poker. By using risk dominance as complementary part of decision method besides payoff dominance, opponent strategies is better characterized as their risk factors, like bluff actions in Texas Hold’em Poker . In this paper, estimation method about the influence of risk factors on computing game equilibrium is provided. A novel algorithm, UCT-risk is proposed as modification about UCT algorithm basing on risk estimation methods. To verify the performance of new algorithm, Texas Hold’em, a popular test-bed for AI research is chosen as the experiment platform. The Agent adopted UCT-risk algorithm performs as well or better as the best previous approaches in experiments. And also it is applied in a poker agent named HITSZ_CS_13 in the 2013 AAAI Computer Poker Competition, which confirms the effectiveness of the UCT-risk provided in this paper.
Implementation of Optical Flow Base on Pyramid on the Zedboard
Authors: Le Jian , Mei Shun Liang , Zhu Yu
Published: August 2014

Using HLS to optimize C++ code,the feature of large-scale motion on the Optical Flow tracking algorithm has been implemented in the vision navigation system. Embedded coprocessor input and output image, FPAG unit exchange date with coprocessor. A complete embed design in Zedbaord that is include FPAG and ARM. The FPAG and ARM collaborative design of a processing system accelerated algorithm speed and restructured the hardware and software frame.
Finite Element Simulation of Deformation of Steel Belt of Overwind Protection for Vertical Shaft Lifting
Authors: He Quan Mao , Shen Fei Ling
Published: August 2014

Steel belt of buffer structure with plastic deformation, employed in vertical shaft lifting as a overwind protection device, is simple and of convenient maintenance. Steel strip bends large deformation and wear when passing through buffer structure, which will damage the buffer strip, and reduce its initial strength as well. This paper focuses on the influence of steel strip thickness and pressure roller diameter on the deformation of steel belt by applying the finite element simulation, to provide theoretical basis for reliability design of the steel strip.
The Analysis for the Leaking Flowrate in the Plane Valveplate
Authors: Wei Jie , Shan Chun Yang
Published: August 2014

A new computation for the leaking flowrate in the plane valveplate sector of the pistons pump considering the influence of the flow inertia is proposed. Establish the theoretical math model about the flow field, based in the N-S equation and the sequence equation, and the leaking flowrate in the plane valveplate sector considering the influence of the flow inertia is computed in the boundary conditions of the press and the velocity. It is not the same as the common formula that the leaking flowrate computation formula established in this paper includes the factor of the flow inertia in the plane valveplate sector, which can reflect the influence of the flow inertia. The theory computation is checked by the FEM simulation. The theory computation result is approximate with the simulation result. The computing results indicate that the leaking flowrate of the plane valveplate sector increases when the press and the height of the seam increase, just as the other conditions are the same. And the flow inertia leads to the increase of the leaking flowrate, the influence is obvious in some conditions.
Pattern Recognition Application of Improved SURF Algorithm in Mobile Phone
Authors: Wang Hui Bai , Yang Lu Nan
Published: August 2014

Directed at the defects of time-consuming feature points extracting and out-of-sync between matching feature points and processing video frames in the original SURF (Speeded Up Robust Features) algorithm in mobile pattern recognition applications. For these shortcomings, this paper proposes an improved SURF algorithm. The algorithm uses buffer mechanism. An adaptation threshold is used when extracting feature points. Experimental results show that using the improved SURF algorithm in mobile applications has achieved the purpose of real-time processing. It has certain values in both theory and practice.
Design and Realization of Intelligent Travel System Based on Data Mining
Authors: Ruan Chuang , Shen Yi Ming , Sun Guang Dong
Published: August 2014

In this paper, we researched a vehicle terminal-based Intelligent Travel System. We gave the overall design of the system architecture, and gave the function of each module. The system could provide users with personalized service focus on users’ preferences and user-based personalized intelligent location information service. We proposed recommendation algorithm focus on user-based personalized intelligent location information, built a set of strong association rules, and optimized foundation algorithm. The results showed that the optimized algorithm had better performance and could satisfy the user’s personalized travel needs.
Analyzing POI’s Attractiveness Variation Based on Taxis’ Trajectories
Authors: Liu Yi Zhi , Li Long Sen , Liao Zhu Hua , Liu Jian Xun , Tang Ming Dong
Published: August 2014

Analyzing the attractiveness of point-of-interests (POIs) in a city is very important to business location selection, market analysis, traffic management, and urban planning. Recently Analyzing the attractiveness of POIs based on GPS data calls scholars’ attention. However, the existing methods ignore the variation of POI’s attractiveness owing to its categories and the time-slots. Therefore, we propose a novel approach of analyzing POIs’ attractiveness variation based on taxis’ trajectories. According to the situation of taxis’ stopping nearby the POIs which belongs to certain categories in different time-slots, we can compute the POIs’ attractiveness. Furthermore, the law of citizens activity can be analyzed and provide reference to urban planning.
Attitude Control Module of Modular Spacecraft Simulation Based on Matlab/Simulink
Authors: Wang Gang , Li Xin Hong , Wei Qiang
Published: August 2014

According to the principle and the structure of attitude module of modular spacecraft,a
matlab/simulink model library for attitude control module was build to resolve the problem of flee-tly modeling.Then its validity was proved by a simulation example.The library was embedded into the platform of matlab/simulink,so it is easy to use and can be serially improved.The methed will be
helpful for modular spacecraft’s design and simulation.
Control Approach Design for Electromagnetic Satellite Formation Flying
Authors: Wan Sheng Hui , Su Yan , Mao Nan Ping , Hu Min
Published: August 2014

Aimed at the electromagnetic formation flying (EMFF) ground testbed, an optimal linear quadric regulator (LQR) and sliding mode controller (SMC) are both proposed in this paper. Firstly, the highly nonlinear characteristics of the electromagnetic force and torque are analyzed. Then, the nonlinear dynamics equations are linearized, the controllability of the linearized system is analyzed, the optimal linear quadric regulator is then presented. Moreover, a sliding mode controller is also presented. Finally, the numerical simulation is carried out to compare LQR and SMC, and demonstrate the robustness of SMC. The results show that the SMC is more effective than LQR, which pave the way for electromagnetic formation flying ground simulation.
Interacting Multiple Mode Tracking Algorithm Based on Modified Coordinate Turn Model
Authors: Xiao Song , Tan Xian Si , Wang Hong
Published: August 2014

The continuing success of near space hypersonic aircraft flight test has become a real threat to China's space attack-defense system, In view of the problem that the single model cannot track such target effectively, an interacting multiple model (IMM) tracking algorithm based on modified cornering model (MCT) was proposed. First the characteristics of near space hypersonic target were analyzed, and then the target real-time angular velocity according to the target motion equation was estimated, finally the near space hypersonic target tracking through the IMM was carried out. The Monte Carlo simulation results show that the IMM tracking algorithm can effectively track near space hypersonic target, and the tracking accuracy and stability are superior to single model, it has certain practical significance.
Traffic Control Strategy Research in Logistics Park
Authors: Kai Xie , Weng Xiao Xiong
Published: August 2014

Logistic Park is a vital logistic infrastructure in modern logistics development, and traffic jam on roads inside the Park also raises concerns. During peak hours, key nodes and channels in the park are jammed due to excessive traffic flow, and vehicle transport in the park is severely restricted. Operation schedule mode of the logistics park determines operation mode of traffic, this paper analyzes operation mode of traffic starting with operation schedule mode, draws up rationality park management and traffic organization schemes to solve traffic jam in the park, and validates rationality and practicability of traffic organization schemes with computer simulation.
A Compatible Public Service Platform for Multi-Electronic Certification Authority
Authors: Sun Yi , Liu Dun Wei , Zhang Peng , Zhang Xu , Yu Tao
Published: August 2014

Electronic certification authority (CA) application has problem in compatibility. The validation between some certification authorities is indispensable. In this paper, special qualities of some overlapped authentication models are analyzed based on the operation application. Also, an electronic authentication public service platform has been designed for compatible application of Multi-CA. The platform is both efficient, and convenient.
Research on Information Sharing Application Technology for the Occupation Skill Teaching
Authors: Shi Yan Hui , Wu Guo Xin
Published: August 2014

In order to achieve the purpose of “integrating students’ practical capacity, initiative spirit cultivation and humanistic quality, technical literacy and artistic achievement” about vocational technology cultivation, in the teaching research on vocational skill competition, we explore, develop and construct a digital information sharing mechanism and application technology oriented to “multi-level, comprehensive skill competition teaching”. On actual vocational skill cultivation, against the multi-level skill competition teaching, we expand the information technology application, and construct digital information sharing resource pool with certain theory bases and application values.
Time Marching Simulation of Aeroelasticity Based on a Coupled Numerical Method
Authors: Xi Rui , Ji Zhan Ling , Jia Hong Guang , Xiao Qian Jin
Published: August 2014

A numerical method integrating computational fluid dynamics and computational structural dynamics for predicating wing flutter in time domain is described. A strong coupling employing the dual-time method is adopted. The Newmark algorithm is used to solve flutter equation in modal spaces while the finite-volume algorithm for the Navier-Stokes equations is used to solve the flow. The computed flutter boundaries of AGARD wing 445.6 for frees-tream Mach numbers ranging from 0.499 to 1.141 agree well with the experiment than using the DLM.
Building the Next-Generation Data Centers Infrastructure Cloud
Authors: Fang Fang , Yu Xiao Feng
Published: August 2014

In order to adapt to the development trend of cloud computing, next-generation data center virtualized computing, storage and other resources to provide users with dynamic deployment of resources through the network, Equipment and technology such as servers, storage, security and software to connect together to form the infrastructure cloud platforms play a key supporting role. This paper focuses on network bandwidth, cabling systems, network protocols, and explores the next-generation data center infrastructure construction. The important idea is how to deploy more energy-efficient and low-cost, on-demand service-oriented infrastructure cloud.
A Strategy of Database Project Task Based on the Crontab
Authors: Xu Lei , Cao San Xing , Ma Li Ming
Published: August 2014

With the development of Internet technology and the increasing popularity of the Internet, the amount of information data of enterprises increased sharply. How to avoid unexpected data corruption and to improve the system of data security and data recovery capabilities has been the focus of attention of users and enterprises. Regular backups of the database is to restore the data the easiest and most effective guarantee method and is an effective measure database administrators to manage data. This paper proposes a plan of database scheduled tasks based on Linux environment. This plan can be timed to export the database, be sent automatically to a secure backup mailbox and complete the regular backup of the database finally.
Cognitive Backoff Algorithm Research
Authors: Wang Jun She , Qiao Rui Juan , Zhang Ya Nan
Published: August 2014

Wireless communication technology has been widely applied in People's Daily life. However, limited spectrum resources and low spectrum utilization of spectrum resources shortage is proposed. In this paper, a cognitive function of backoff algorithm (CR-BOA) is raised. This algorithm depending on the degree of congestion channel adaptive adjustment the size of the backoff value .This algorithm greatly improves the performance of the network, and reduces the problems of delay caused by the spectrum resource scarcity. Finally, use the OPNET simulation software, the results show that the end-to-end delay and the packet loss rate are reduced.
Automatic Detection of Grid Delivery Services Using a Real-Time Monitoring System
Authors: Kim Yeo Neo , Kim Gun Woo , Woo Gyun
Published: August 2014

Though Grid Delivery Services (GDSs) can promote Quality of Service (QoS) in Content Delivery Networks (CDNs), some of them may degrade the performance of the client computers by consuming the network resources. The worst part of GDSs is that some of them are registered as system services and executed automatically when the operating system boots up. Since GDSs are not classified as malware, it is extremely hard to detect them automatically even when the user wants to remove them. This paper proposes an automatic method to detect GDSs by monitoring the network usage of all the processes. We include empirical evidence to indicate this approach is effective even though it adopts an extremely simple approach.
Virtual Environment to Aid in the Teaching of Multiplication Tables to Elementary and Middle School Students with ADHD
Authors: Sanchez Wagner Marcelo , Kawamoto Luiz Teruo , Rodrigues Silvia Cristina Martini , da Silva Alessandro Pereira
Published: August 2014

Learning the multiplication tables is extremely important to the elementary and middle school students, it is one of the pillars to understand mathematics, but sometimes learning this content becomes something mechanical and exhausting, making it difficult for the students to understand, especially those with Attention Deficit Hyperactivity Disorder (ADHD). Therefore a virtual environment was developed to teach the multiplication tables to the elementary and middle school students with ADHD. All good programming practices were followed. The validation was performed by educators and computer specialists with excellent results. For the next stage of the research a validation with the students will be performed.
A Visual Simulation System Based on QT-STKX Research
Authors: Liu Shi Xuan , Li Xin Hong , Zeng Jun Kang
Published: August 2014

STK is the important tool of satellite simulation and analysis, it can be intuitive and vivid reflects the state of satellite orbit. The STKX component allows user code to respond by writing incident response and control the user to the operation of the GUI interface STK components, in order to enhance the application of interactive ability. In this paper, through the application of the STKX component, and the design of Qt Chinese interface, realize the function of orbit dynamics simulation, 2D and 3D images and satellite images show function; To realize the Two-way exchange of information. Convenient man-machine interface and Chinese interface implements the intuitive and mutual assistance, and operating process of the simulation.
Strength Checking of Caterpillar Tractor Guide Wheel Crankshaft under Working Condition
Authors: Ouyang Lin Hui , Deng Xiao Tao , Yue Zhu Feng
Published: August 2014

Guide wheel crankshaft used in caterpillar tractor is analyzed under working condition. The crankshaft is made of 45Cr steel. Since the work conditions of the crankshaft are complicated, three dimensional finite element model of the crankshaft is built for strength checking of the crankshaft. Appropriate boundary condition is applied. The results show that the maximal stress of the crankshaft is 728MPa, which is less than the yield limit of 45Cr steel (835MPa). Therefore, the crankshaft can not be broken during the work of caterpillar tractor.
A Collaborative Filtering Recommendation Algorithm Based on Cloud Model, Item Attribute and User Data
Authors: Sun Jian , Chen Xiao Ying
Published: August 2014

Aiming at the problems of extremely sparse of user-item rating data and poor recommendation quality, we put forward a collaborative filtering recommendation algorithm based on cloud model, item attribute and user data which combined with the existing literatures. A rating prediction algorithm based on cloud model and item attribute is proposed, based on idea that the similar users rating for the same item are similar and the same user ratings for the similar items are similar and stable. Through compare and analysis this paper’s and other studies experimental results, we get the conclusion that the rating prediction accuracy is improved.
A DNA Computing Model for the AND Gate in Three-Valued Logical Circuit
Authors: Shan Jing Yi , Yin Zhi Xiang , Tang Xin Yu , Tang Jing Jing
Published: August 2014

Multiple-valued logic is an extended form of Boolean logic. In daily life, people often encounter the problem about the multiple-valued logic. With further study on Boolean logic, multiple-valued logic has been paid more and more attention by researchers. This paper achieves the operation of AND gate in three-valued logic by using the DNA hairpin structure. The experiment makes the DNA hairpin structure as the basic structure, and the molecular beacon as the input signal, and at last judges the logical results according to the intensity of fluorescence and gel electrophoresis. This method has the advantages that it has high sensitivity, good feasibility, and it is easy to observe. In addition, this method reduces the hybrid competition to a certain extent, and it is a new attempt to the research on multiple-valued logic.
Energy-Efficient Opportunistic Routing Protocol in Wireless Sensor Networks
Authors: Zhang Zhen Yu , Wen Shao Jie , Yang Wen Zhong , Zhao Fei
Published: August 2014

The paper presents energy-efficiency opportunistic multicast routing protocol (EOMR) for the multicast energy consumption minimization problem in wireless sensor networks. The protocol divides the network into single grids, so each node determines their own coordinates according to the grid, which they locate in a certain period of time. The nodes only need to know the topology of their own grid, instead of the topology of the entire network. Nodes in the same grid determine the priority in light of the upstream and downstream links metrics, and use the opportunistic routing to send messages to the next hop. The destinations calculate the optimal path in accordance with the hops and links cost, and transmission acknowledgement to source along the optimal path selected. If all nodes in the current grid transmission messages failure, the neighbor grids are in charge of retransmission. The results of simulation show that, compared with traditional multicast routing, EOMR is effective in reducing the consumption of links cost, so that it improves the link reliability and reduces the delay.
Design of Vehicle Location and Communication System Based on BeiDou Navigation Satellite System (BDS)
Authors: Wang Zhen Dao , Zhou Qi Jia , Ruan Zhong Zhou
Published: August 2014

In order to realize the fusion of secure real-time location of vehicles and reliable communication with the outside world, a vehicle location and communication system was designed based on BeiDou Navigation Satellite System. The embedded Linux operating system platform was proposed with ARM processor S5PV210 as the core. On the basis of open source graphical user interface library QT, BDS was utilized to realize vehicle positioning and short message, GSM for car phone and SMS. The experiments show that the functions are achieved, such as vehicle positioning, car phone, short message and so on.
Nomo-Graph for Determining the Effective Length of Columns with the Leaning Columns
Authors: Zheng Yao , Zhou Dong Hua , Ouyang Zhi Lun , Zhu Jing Lin , Han Chun Xiu
Published: August 2014

In this paper the elastic load-carrying capacity of the stability columns, which provide lateral support to leaning columns, is investigated. The solution to the effective length of the columns is obtained by using of differential equations. The influences of the leaning columns on the stabilizing columns are studied and the nomo-graphs for determining effective length of the supporting columns are made for practical using. The effective length of columns can be quickly determined by using the nomo-graph, which shows intuitively the trends of the curves in the nomo-graph owing to some relevant parameters.
The Throughput Analysis of IBTCRPP-CSMA in Ad Hoc Network
Authors: Ding Hong Wei , Wang Zheng , Zhao Yi Fan , Zheng Zhe , Liu Qian Lin
Published: August 2014

From the point of view to improve QoS of Ad Hoc network, this paper analyses the problem about mobile nodes in Ad Hoc network and decides to solve the problem by designing effective MAC protocol. Therefore, a novel random multi-access protocol using Binary Tree Collision Resolution for collision packets in Probability-Persistent Random Multi-Access (IBTCRPP-CSMA) is proposed. The throughput of IBTCRPP-CSMA and computer simulation experiments are obtained. Simulation results agree with theoretical analysis. By contrasts of throughputs among several CSMA protocols, IBTCRPP-CSMA has higher throughput and channel utilization, thereby ensuring the system’s high QoS.
Research on the Material Model of Cold Deformation Strengthened Steel
Authors: Zhang Tie Shan , Luo Hui Hui
Published: August 2014

The material model of cold deformation strengthened steel were studied. Firstly, on the basis of primary analysis for the material model, two assumptions are brought out. Then, on the basis that the residual stress and grain boundary state are detected, the constitutive equations are established by using affine transformation strain method.
2-D Transient Radiative Heat Transfer Analysis on the Slab in a Walking-Beam-Type Reheating Furnace
Authors: Huang Jun Bo , Jang Jiin Yuh , Lin Chien Nan , Wang Chao Hua
Published: August 2014

A two-dimensional mathematical heat transfer model for the prediction of temperature distribution within the slab has been developed by considering the thermal radiation in the walking-beam-type reheating furnace chamber and transient heat conduction in the slab, respectively. The steel slabs are heated up through the preheating, heating, and soaking zones in the furnace. Heat transfer characteristics and temperature uniformity of the slab is investigated by changing hot gas temperature. Comparison with the in-situ experimental data show that the present heat transfer model works well for the prediction of thermal behavior of the slab in the reheating furnace. The skid mark severity decreases with an increase in hot gas temperature. Keywords: Reheating Furnace, Thermal Radiation, Transient heat conduction
Simulation Analysis of Pneumatic Rubber Bellows for Segment of Hyper-Redundant Robotic Mechanism
Authors: Prada Erik , Virgala Ivan , Granosik Grzegorz , Gmiterko Alexander , Mrkva Štefan
Published: August 2014

The paper deals with a design and simulations of segment for hyper-redundant manipulator. In the paper 6-DOF manipulator segment, which consists of pneumatic and electromagnetic actuators, is designed. CAD model of the segment is introduced and basic parts are described. The basic motion is reached by pneumatic actuator which works through the rubber bellows and it utilizes their expansion properties. Main focus of the study besides segment design is analysis of rubber bellows. From this reason FEM analysis is done in software SolidWorks. In the conclusion the results are discussed.
Numerical Modelling of Glued Joints between Metal and Fibre Composites Using Cohesive Elements
Authors: Lašová Václava , Bernardin Petr
Published: August 2014

The main goal of this work is to find the optimum way for numerical simulation of bonded joints using finite element analysis. The most important requirements for the model are simplicity, wide utilization (for all types of bonded joints) and efficiency. The final paragraph includes the way of determination of damage and cohesive parameters of bonded joints using cohesive surface based contact. The results of this research should be suitable for modelling of the general type of bonded joints.
Parallelepiped Sandwich Shell - Searching for the Optimal Geometric Parameters
Authors: Tertel Edward , Kuryło Piotr , Papacz Władysław
Published: August 2014

The paper presents investigations of the optimal geometric parameters for the sandwich rectangular pipe. The analyzed parallelepiped shell is loaded with uniform internal pressure. The objective function is the ratio of the shell structure mass to mass of the medium contained in the shell. The minimum of the objective function is searched. The optimization constraints are a geometric conditions relating to the dimensions of the shell, and strength requirements. The solution was obtained and the optimum geometrical parameters are presented.
The Simulation Model of Experimental Equipment for the Research of Pipe Conveyor Belts Using ABAQUS Software
Authors: Fedorko Gabriel , Molnar Vieroslav
Published: August 2014

We can effectively use experimental and simulation approaches for pipe conveyors research. The paper describes a simulation of experimental measurement which was realized by special test device for pipe conveyors research. The simulation model was created by the help of program Abaqus.
Hyperplastic Material Models and their Applications in Engineering
Authors: Glodová Iveta , Bocko Jozef
Published: August 2014

In this paper concepts and behaviour of plasticity, hyperelasticity and hyperplasticity are explained and clarified. Description of hardening models and hyperplastic models is provided too. The theoretical overview presented in this paper covers the crucial prerequisite for creating and applying hyperplastic material models into practice, either for simulation purposes or for real world application.
Influence of Pipe Geometric Deviations on In-Pipe Machine Locomotion
Authors: Kelemenová Tatiana , Duchoň František , Puškár Michal , Kelemen Michal , Kuryło Piotr , Prada Erik , Lipták Tomáš
Published: August 2014

The paper deals with the analysis of influence of pipe deviations on in-pipe machine locomotion. In-pipe machine locomotes inside a pipe using the friction difference principle of locomotion. Main task of the machine is inspection of inner pipe wall as the prevention of pipe crack and leaks of transported medium. Pipe systems have deviations of inner pipe wall, which are caused by production process and caused by using of pipe (deformations, sediments, changes from coupling of pipes etc.). These pipe deviations have direct influence on machine locomotion inside the pipe.
The Stress Analysis in Dangerous Section of Gear Teeth
Authors: Medvecká-Beňová Silvia , Mantič Martin , Grega Robert
Published: August 2014

The calculation of the stress in the tooth is based on a number of assumptions. Here is calculated so-called comparative stress. This is useful if they are used in calculating the results and findings from research and practice in the determination of any effects that affect the actual teeth stress. The complicated shape of the teeth is the theoretical determination of stress in the teeth difficult. The starting assumption is highly idealized notion of a linear displacement of the tooth for and tooth load is considered as a beam loaded by bending. The paper deals with the problems of stress examining in a dangerous section of the foot tooth with asymmetrical profile. The stress of tooth is solution by finite element method.
Identification and Control of Nonlinear Laboratory Model Amira DR 300
Authors: Navrátil Petr
Published: August 2014

This article deals with identification and a control design of nonlinear laboratory model Amira DR 300 in a real time. It mentions a mathematical description of the model, its static and dynamical characteristics. Using an experimental method of identification a model has been created, which is suitable for the purpose of simulation testing of non-adaptive as well as adaptive controllers. These were tested as simple adaptive, i.e. non-adaptive controllers, namely in both simulation ways and at a real model control. For the purpose of a non-adaptive control, system parameters were determined by off-line method of the least squares. In an identification part of self-tuning controllers a method of recursive least squares with directional adaptive forgetting factor has been used.
Geometric Optimization of the Differential Gearbox
Authors: Medvecká-Beňová Silvia , Frankovský Peter
Published: August 2014

The paper discusses optimizing of centre differential heavy truck wheel without reductions. Under optimization in this case is meant the differential type customizing cabinet designed for easy gear to withstand heavy load of a new gear. Critical structural adjustment of high-voltage areas must be such that tensions are reduced. The basis for this optimization is the result of task solution by finite element method.
Application of Karray-Bouc Hysteretic Model for Cumulative Damage Calculation Using Energy Fatigue Curve
Authors: Sága Milan , Vaško Milan , Kopas Peter , Jakubovičová Lenka
Published: August 2014

The paper deals with the application of numerical computational tools for the hysteretic curve identification using Karray-Bouc and Ramberg-Osgood models. The Karray-Bouc model parameters will be determined from Ramberg-Osgood model and Manson-Coffin curve parameters. Using special MATLAB’s procedures we can calculate dissipative (hysteretic) energy density per cycle and express Manson-Coffin curve in energy version.
Analysis of the Fatigue Life of Composite Leaf Springs
Authors: Papacz Władysław , Tertel Edward , Frankovský Peter , Kuryło Piotr
Published: August 2014

The automobile industry has shown an increased interest in the use of composite leaf springs due to their high strength to weight ratio. The introduction of composite materials has made it possible to reduce the weight of the leaf spring without any reduction in load carrying capacity and stiffness. In this paper, the results of research on fatigue life of composite (Glass Fiber Reinforced plastic – GFRP) leaf springs are presented. Composite springs were designed in such a way that they could replace steel springs in a van.
Optimization and Elimination of Bottlenecks in the Production Process of a Selected Company
Authors: Trebuňa Peter , Kliment Marek , Fiľo Milan
Published: August 2014

The paper deals with optimization of the production process in a selected company. The proposal of elimination of bottlenecks that were revealed in the analysis of the production process is described here in this paper. For clarity and zooming of the production process models were processed in a simulation software module from Siemens PLM Software - Tecnomatix Plant Simulation. Improvement suggestions will help to reduce the time of production operations, to improve product quality, to facilitate the work of the staff and to increase economic efficiency of production. The application of PLM software enables companies to analyze and easily develop manufacturing processes in the future, or to build new processing lines and departments [4]. It will help to optimize the current state of workplace and will allow easier data management throughout the life cycle, not just within this particular company, but throughout the corporation to which the enterprise belongs.
Optimization of Device Selection in Design of Technological Lines for the Aggregates Production
Authors: Laciak Marek , Šofranko Marian
Published: August 2014

This paper describes in the introduction part basic information concerning selection of device of technological line for the aggregates production. It is mostly focused on crushers, which during the crushing have main influence on the outer characteristics of aggregate. Correct functionality of crushers in the process of production of aggregate is crucial and relies on the selection of right mechanical influence on pieces of aggregate during crushing while respecting characteristics of crushed rocks and parameters of chosen crusher. Because of this there are written basic principles of mechanical influence on crushed material of pressure influence (jaw crusher) and with dynamic influence (impact crusher). Later are listed basic requirements for connection of each device within technological line on which follows description of an application for designing of technological line. This application allows designing the technological line with optimization of selection of devices which are using databases of available devices while still respecting listed basic rules of connection to the technological line. This way is ensured requirement of continuous material flow in production of aggregate on technological line.
Production Structure Reconfiguration Based on Cluster Analysis of Production Objects
Authors: Halčinová Jana , Janeková Iveta , Rudy Vladimír , Trebuňa Peter
Published: August 2014

The paper provides a description of production structure reconfiguration by means of cluster analysis. The production segmentation was based on input information on the production of a valve which consists of individual parts and runs through production machines and devices integrated into given layout plan. The result of this segmentation is a proposal of a new layout plan of valve production.
Automatic Generation of Equations of Motion of Mechanical Systems
Authors: Hroncová Darina , Filas Jozef
Published: August 2014

The paper describes an algorithm for automatic compilation of equations of motion. Lagrange equations of the second kind and the transformation matrices of basic movements are used by this algorithm. This approach is useful for computer simulation of open kinematic chains with any number of degrees of freedom as well as any combination of bonds.
Application of Differential Equations to Calculations of Large Deformations of Structural Members
Authors: Ostertag Oskar , Novotný Ladislav , Ostertagová Eva
Published: August 2014

The article discusses the application of differential equations to solve large deformations of the designed slender structural elements. The structural element under design has a variable circular cross-section in longitudinal direction. It is made of a composite material based on carbon fiber and is capable of large deformations. In the solution it was necessary to consider the nonlinear deformation theory, which led to the solution of a nonlinear differential equation of second order. The creation of the differential equation describing the line of elastic deformation of a significantly curved structural element required the formulation of input equations and boundary conditions for its solution. The results obtained by means of a differential equation were compared with the numerical solution applying the finite element method. The solution presented and methodology can be used for practical application in the engineering design of fishing rods.
Strain and Stress Analysis around the Notches Using ESPI Method
Authors: Kalina Matúš , Šimčák František
Published: August 2014

Modern speckle optical methods use the properties of coherent light for identification of displacement fields. One of these methods is method ESPI. Using of this method strain and stress fields on surface of flat test samples with symmetric notches by tensile and shear loading were identified. A special fixture for shear loading of test samples was designed. The shape and dimensions of the fixture were modified on the basic results of experimental measurements. A modification allowed us to obtain a better analyse of strain and stress fields of test samples with symmetric V notches.
Detection of Welds in Automated Welding
Authors: Duchoň František , Dekan Martin , Babinec Andrej , Chovanec Lubos , Vitko Anton
Published: August 2014

This article deals with automated welding conceived as a robotic welding cell. Laser scanners used in automated welding are described in the main part of the article. Then, the control scheme of the robotic welding is defined. Several simple algorithms are proposed for the data processing. Emphasis in these algorithms has been placed on simplicity, so that they can run online. Algorithms have been verified on several scenarios.
Bending Tests and Simulations of GLT Beams
Authors: Melzerová Lenka , Šejnoha Michal , Klapálek Pavel
Published: August 2014

The paper reports on two specific research activities devoted on the one hand to detailed finite element simulations of glued timber beams with emphases on random nature of the modulus of elasticity and, on the other hand, to destructive testing of a set four glued timber beams having structural dimensions. While the stochastic simulations were founded on the knowledge of probability density distributions of the modulus of elasticity acquired from non-destructive testing of local moduli from 3600 regularly spaced indentation measurements, the destructive testing of beams in four-point bending aimed at providing information to be used a-posteriori in improving the original predictions in the framework of Bayesian statistics. In this regard the non-destructive testing together with stochastic simulations of beam deflections is assumed to provide prior information to be updated in the second Bayesian step. This, however, will be discussed elsewhere so that only necessary prerequisites are mentioned here.
Analysis of Uncertainty of Tilt Measurement with Accelerometer
Authors: Lipták Tomáš , Duchoň František , Kelemenová Tatiana , Puškár Michal , Kelemen Michal , Kuryło Piotr , Prada Erik
Published: August 2014

The paper deals with the analysis of uncertainty of tilt measurement using accelerometer. Low cost accelerometer based on the principle of heat array is used for tilt measurement. One chip microcontroller is used for data processing from accelerometer. The knowledge of uncertainty of measurement for this measuring chain is necessary for our application.
Effective Methods of Parameters Refinement of Machinery in the Program MSC.ADAMS
Authors: Sapietová Alžbeta , Sága Milan , Hyben Bohuslav , Sapieta Milan
Published: August 2014

As a result of a large number of optimising problems, the classification of these problems is essential in the analysis of a given task. One of the parameters significantly affecting the speed and effectiveness of the solution is the correct choice of the optimising variables. We start from the fact that not all the optimising variables have the same influence on the selected objective functions. The goal of the paper is to present a sensitivity analysis which will exclude optimising variables of lower influence and select parameters which will serve as design variables in subsequent optimising analysis.