bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research and Implementation of Auto-Dimension in Engineering Drawing Based on Pro/E
Authors: Zhao Zi Bin , Niu Qin Zhou
Published: August 2014

The dimensioning is a time-consuming job in engineering drawing. So, it introduced an automatic dimensioning method to improve the efficiency of drawing dimensioning. Firstly, it used the functions which provided by Pro/Engineer to extract the parts dimension information from part’s feature. Then, in order to avoid the overlap in dimensioning, it stratified the dimensioning zones. Finally, it constructed a hash function to determine the location of each layer. The method has been implemented in an engineering drawing dimensioning system based on Pro/E, and successfully applied to the dimensioning in engineering drawing of CNC gantry milling machine parts.
The Design and Implementation of Multi-Protocol Database Audit System
Authors: Li Hao , Qiao Jun Feng , Liu Cheng Ying , Wang Zhao
Published: August 2014

the security of database system as the core component of data storage has been increasingly important. Effective audit of the database system can reduce the potential security risk. Practical database audit system should not affect the operation of the existing system which uses audited database. This paper presents and implements a multi-protocol database audit system based on bypass mode, and has a detailed description of the function of each module and the interface between them. This paper designs a detailed database audit policy to achieve effective audit. In the second half of this paper, we focus on the implementation of the key technologies which contain Zero-copy and flow table. Keywords-database;zero-copy;flow-table;policy;audit
The Application of CMIC in Cultivating Learners’ Cross-Cultural Communication Competence
Authors: Li Xiang Min , Wang Yuan Ge
Published: August 2014

With the fast development of computer and internet technology, how to apply computer and internet technology into intercultural teaching to improve learners' intercultural competence aroused great interest in foreign language researchers and teachers. This essay tries to analyze the effects of CMIC on the intercultural competence of learners through the CMIC teaching practice between two universities from China and US. Based on the analysis of the questionnaire, students' reflective logs, and interviews, this essay concludes that the application of CMIC in intercultural teaching has positive effects on the improvement of learners' intercultural competence and that CMIC should be more widely applied into intercultural teaching.
Identification Method of Directed Digraph in Organization Knowledge Unit
Authors: Zhang Yuan Hao , Ren Jun , Yin Guang Na
Published: August 2014

Now the identification of knowledge units and the relationship among them is still subjective and lacks systematic and scientific method. For improving rationality, the article applies digraph theory and arithmetic. The article puts forward to aggregation knowledge node into knowledge unit on certain arithmetic, and confirms the relationship among knowledge units in an organization. Case study shows that this method is more effective and rational than traditional simple method.
Information Quantitative Analysis on Psychological Research
Authors: Ren Cong Jing , Liu Yang
Published: August 2014

With the fast development of the theories and techniques in information science in recent years, a variety of new methods have been used to help scholars in other fields manage the corresponding knowledge. This paper applied the research methods of information science to psychology to analyze the literature in psychology cited by ISI Web of Knowledge, then got a better understanding of psychology science. In order to understand the dynamics of psychology science, we conducted a quantitative analysis based on 8137 articles cited by SCI or SSCI, and used CiteSpace II to visualize the trends and patterns in the scientific literatures. In the end, the authors drew the following conclusions: (1) among all the individual authors, Cohen J and Seligman MEP share the highest citation times; (2) publications like Positive Psychology - An Introduction, Diagnostic and Statistical Manual of Mental Disorders (DSM), Statistical Power Analysis for the Behavioral Sciences have ranked first in the cited papers; (3) community psychology, clinical psychology, behavior, personality, model, self-are the hot areas and the frontier fields in psychology research.
A Fast Block-Matching Motion Estimation Method Based on Difference Search Algorithm
Authors: Liu Chang Jiang , Chen Chao , Zhang A Fei , Yan Xiao Lang
Published: August 2014

The diamond search (DS) algorithm is one of the most efficient block matching motion estimation algorithms by far and has already been applied in MPEG2/4. Through our research, we found that there is still some redundancy in the algorithm. In this paper, an improved new difference based search (DBS) algorithm is proposed. Simulation results demonstrate that the new algorithm outperforms the well-known diamond search (DS) algorithm and four step-searches (4SS). It obtains almost the same Peak Signal to Noise Ratio (PSNR) while requires less computations than the DS algorithm and 4SS algorithm.
Discussion on the Construction of the Campus Desktop Virtualization
Authors: Wang Hong , Wang Ming Yan
Published: August 2014

In this paper, the current problems and demands of campus information system was analyzed and the desktop virtualization solutions were probed. Thus, under the cloud system structure, the user can simply login by the client in desktop systems of data center, as well as traditional computer operating. As a result, the flexibility and security in application of resources are enhanced. More over, schools can avoid the repeated investment and reduce the pressure on hardware and software maintenance, and improve the working efficiency.
Analysis of E-Mail Security Events and its Solutions
Authors: Niu Pian , Jiang Zheng Tao
Published: August 2014

With the rapid development of internet, E-mail has already been an indispensable tool of communication. However, because of some inherent technological insufficiencies, users’ weak sense of security and attacks from hackers, E-mail using is facing with many challenges such as virus-carrying E-mails and E-mail bombs, which results in severe consequences in terms of E-mail security. On the basis of studies of severe E-mail security events in recent years and with the application of technologies on information security, this paper attempts to give two kinds of proposals to solve problems concerning E-mail security from the perspectives of government, company, university and individual respectively. The first is a general proposal for all E-mail users and the second is a proposal on improving information security technology.
Recent Advances in Script Identification
Authors: Ubul Kurban , Tursun Gulzira , Aysa Alim
Published: August 2014

There are a variety of different scripts in the world. Almost every country have there own languages and scripts which can distinguish from each other in different aspects. It is very essential to identify different scripts in multi-lingual, multi-script document. In recent years, different kinds of approaches have been developed for script identification and gotten promising results. In this paper, an overview of the script identification is proposed under different categories: script systems, extracted features and classification methods. Earlier researches and future property of this field is discussed. It is very obvious that, the research in this area is not so satisfied and still more research is to be done.
The Application of Compound Document Storage Technology in Forensic Analysis System
Authors: Du Jiang , Chen Bin Lang , Qin Zeng
Published: August 2014

Due to the special nature of electronic data, we need to create a complete copy of the raw disks before computer forensics. There is two ways to create a copy. One is copy from Disk to disk, another is disk mirroring. The former capacity of the copy disk has fixed while image file of the latter is highly compressed already. Neither any of them can add the forensic analysis evidence; it will be handed over to the court as a whole set of evidence. This will affect the completeness and admissibility of the evidence. In this thesis, we will take the disk mirroring and storage technology into consideration by using the Compound Document storage technology, by this way we can add the evidence into the evidence copy which makes an “evidence gathered” effect. At the same time, it can highly compressed the original evidence, save the capacity and ensure the safety of the data.
Study on Seismic Performance of Offshore Platform with Rocking Wall - TMD System
Authors: Zhang Ji Gang , Jiang Zhi Wei
Published: August 2014

Offshore platform rocking wall system and tuned mass damper are briefly introduced, and the paper integrates the advantages of these two kinds of seismic method, and the TMD is attached to the jacket offshore platform - rocking wall system, using the ANSYS for finite element analysis, and the analysis results are optimized. The results show that compared with the offshore platform - rocking wall system, additional TMD can give full play to the performances of the two kinds of seismic methods, which is remarkable.
A Positioning System For Subway Trains Based on RFID
Authors: Zhen Hui , Jia Lin Min , Cai Guo Qiang
Published: August 2014

Subway train positioning technology is one of the key technologies, however when red band appears in dispatch center, train ground communication fails and other issues, you need a back-up emergency systems to provide train position information for the station dispatchers in order to arrange train route. This paper describes a back-up system for positioning subway trains. The system is a combination of vehicle and ground subway train assisted positioning system, it can fast and accurate get the location information of subway trains, to provide protection of safe and efficient operation for the subway trains.
HTSC Cascaded Linear-Phase Filter with Quasi-Elliptic Response
Authors: Zhang Tian Liang , Yang Kai , Ren Xiang Yang , Zang Ling , Zhang Yi Fei , Tang Jun Tan , Luo Zheng Xiang
Published: August 2014

In view of the difficulty of designing a high-order linear phase filter with prototype parameters directly, this paper proposes a new approach to rapidly construct a high order linear phase filter through cascading two same low-order linear phase filters. A twelve-order HTSC cascaded linear phase filter is fabricated on YBCO/LaAlO3/YBCO substrate with the dimension of 44.1mm ×31.4mm. The measured result shows that the filter has a 56 MHz passband at a center frequency of 1993 MHz. The minimum insertion loss in the passband is 0.59 dB. The group delay variation in passband is less than 5 ns over 78.5% of the filter bandwidth which is in good agree with the simulation result.
Design and Development of Antennas Design and Testing System
Authors: Ran Xiao Ying , Yu Zhen
Published: August 2014

Based on the antenna experiment hardware, an antennas design and testing system is achieved by use of Visual Basic and Flash software development tools. The paper introduces the antenna experiment hardware and antenna pattern and input impedance measurement methods, discusses the overall structure of the system and software design. Take the helical antenna as an example demonstrates the system application in antenna simulation, design, and measurement procedure. The application shows that the self-developed system with interactive, practical and realistic which has been applied to the curricular experimental teaching and extra-curricular innovation, and achieved good results.
Safety Strategy Research on Mobile IPv6 Network Anti-Invasion
Authors: Dai Hong
Published: August 2014

Through the discussion of the mobile IPv6 intrusion detection model, analysis of mobile IPv6 communication technology, the solutions are given to prevent mobile IPv6 network intrusion behavior for providing the security policy.
Determining the Effective Length of Frame Column in the Action of the Fore with Variable Directions
Authors: Ouyang Zhi Lun , Zhou Dong Hua , Zheng Yao , Zhu Jing Lin , Han Chun Xiu
Published: August 2014

Steel structure is designed by limiting condition generally. Checking its stability is important in design. Calculating the effective length of the column is a key of stability checking. Some charts and formulas are written on Code for Design of Steel Structures, which is not applicable to the structural systems because of some assumptions. What is more, finding some values is not easy and the trend of the values is not obvious. In the paper the effective length of the column in the action of the fore with variable directions is derived by the equilibrium condition method and the effective length of the column chart is also drawn. Using these charts can quickly determine the effective length, and there is an intuitive tendency which the effective length varies with parameters.
Design and Implementation of Information Distribution System Based on Car Navigation Map
Authors: Ruan Chuang , Lei Bin , Sun Guang Dong , He Guang Ping
Published: August 2014

Route map based on car navigation, multi-point navigation of the same area in different locations and voice navigation with voice broadcast was studied. Achieved an overall system with car navigation map information distribution and voice broadcast using GPS positioning methods MapXtreme technology and improved ant colony optimization based on occasional algorithm. The system solved navigation problems of the shortest path between two points, the shortest time, the optimal K paths and multi-point route planning, as well as the voice-based navigation problems. The whole system worked well and could meet the travel navigation requirements of travelers and relevant departments.
Effect of Noise on Phase Spectrum Time-Delay Estimation Method
Authors: Deng Lei Lei
Published: August 2014

The phase spectrum time delay estimation (TDE) method is being used widely in trajectory tracking and target location, which due to its superiority in computation load and accuracy. However, the precision of TDE had declined severely as the result of noise. This paper plans to analyze the factor of noise, which has effects on the performance of phase spectrum TDE algorithm based on the difference principle. Theoretical analysis and computer simulation show that the fluctuation of phase caused by noise leads to poor performance. Furthermore, the extent of the influence relates to the time delay and signal frequency.
Probability Detection CSMA with Monitoring Based on the Improved Binary Tree Conflict Resolution Algorithm
Authors: Guo Ying Ying , Ding Hong Wei , Zhao Yi Fan , Guo Jia , Liu Qian Lin
Published: August 2014

This paper presents a new wireless sensor network MAC protocol: the probability detection CSMA protocol with monitoring function based on the improved binary tree conflict resolution algorithm. By using the average cycle method, the paper gets the mathematical expressions of the throughput, system average delay of the probability detection CSMA protocol with monitoring function and the probability detection CSMA protocol with monitoring function based on the improved binary tree conflict resolution algorithm through complicated mathematical modeling, rigorous mathematical derivation. The computer simulation results not only confirm the correctness of the theoretical analysis but also show that the probability detection CSMA protocol with monitoring function based on the improved binary tree conflict resolution algorithm due to adding to the conflict resolution algorithm, resulting in the increases of systemic throughput but increase the time delay of the system.
Improved AODV Routing Protocol Based on SNR
Authors: Wang Bin , Meng Hao , Li Shen Yong
Published: August 2014

This paper briefly analyses the routing establishing process of AODV and points out its imperfection, proposes the AODV routing establishing principle based on SNR. The Network delay and data throughput of the improved AODV have all been improved as simulation results proves. Finally the conclusion was given, illustrating that the improvement avoids the bad influence to the transmission rate of the whole link, which brings by low SNR node, and increases the data transmission efficiency.
Research on Low Power Routing Protocol for WSNs
Authors: Rouaba Ahmed , Soualmi Nouamane , Wen He Zun
Published: August 2014

A wireless sensor network (WSN) consists of large number of autonomous sensors nodes; these nodes communicate with each other in dispersed manner to observe the environment. WSNs become one of the most important researches in modern communication systems. The energy source of nodes is limited and practically it is impossible to change or charge the battery. In order to save energy and increases the life time of battery in WSNs. Many energy routing protocols using the clustering were proposed in the literature. Low Energy Adaptive Clustering Hierarchy (LEACH) is the most famous routing protocol. In this paper we propose a new algorithm to choose the cluster head which has the highest energy. We shared the network to four regions, between them 90° for each part we find the powerful sensor between the sensors groups, and this last will be the cluster head of this round. Each sensor sends its data to the nearest cluster head and this last will send it to the sink. The same work for five and six clusters heads with sink in the center and in the corner (100, 0) is done.
The Loss Rate Analysis of Information Packet in Bi-Directional Cable TV Network
Authors: Yang Ya Wei , Guo Jia , Ding Hong Wei , Wang Yong , Liu Qian Lin , Guo Ying Ying
Published: August 2014

In this paper, the authors employ the M/M/1 system and single-queue and single-server system of gated service, the information packets of Bi-directional cable network are calculated and analyzed theoretically, and the loss rate of information packet is also simulated by computer compared to the theoretical analysis in the paper. Simulation results show that the theoretical analysis and simulation are consistent.And the information packet of Bi-directional cable TV network using single-queue and single-server system’s loss rate analysis of information packet in the transformation provides reference to the theoretical analysis and computer simulation.
Structural Properties, Modeling and Optimization of Tribological Behaviors of Plasma Sprayed Ceramic Coatings
Authors: Chen Shuang Hchuan , Jean Ming Der , Liu Chyuan Du , Su Shu Chuan , Chen Shuen Chou , Wu Wen Tung , Lee San Jen
Published: August 2014

This study used Taguchi plasma-sprayed experiments to determine the surface wear-resistant performance optimization of yttria partially stabilized zirconia (ZrO2/8Y2O3) coatings. Eight control factors based on L18 arrays were conducted and the wear-resistant properties of coatings were evaluated in the experiments. Based on analysis of variance, the optimal settings have been identified, and response surface methodology is utilized. Further, the contour nature of the quadric function is conducted to validate the tests in the Taguchi designed experiments. The experimental results obtained show that using an experimental design strategy with the proposed quadric model is useful not only for predicted optimal process parameters to achieve a desired quality but also for process optimization. Several response plots were generated to examine parameter effects on the response profiles. In addition, microstructures of the worn surface were examined, revealing a dense texture and highly anisotropic properties in the coatings with high anti-wear behavior.
Mathematical Model of Four Wheeled Mobile Robot and its Experimental Verification
Authors: Miková Ľubica , Kelemen Michal , Koniar Dušan
Published: August 2014

The paper deals with creation of a mathematical model of the mobile robot. For description of the kinematic variables such as position and velocity of each wheel a transformation matrix is used. The simulation model can be applied for calculation of assumed of the undercarriage centre of gravity and path of wheels. The function model was also used for experimental verification of the results of simulation experiments.
Modeling of Newtonian and Non-Newtonian Liquid Sloshing in Road Tanks while Braking
Authors: Shimanovsky Alexandr , Kuzniatsova Maryna , Sapietová Alžbeta
Published: August 2014

Finite element modeling of the Newtonian and non Newtonian liquids oscillations in the cylindrical transport reservoir at its braking was performed. The peculiarities of the Newtonian, Ostwald de Waele and Bingham models of liquid sloshing in tank with internal perforated baffles and without them were analyzed. There were obtained the dependences of hydrodynamic pressures and liquid energy dissipation for Newtonian and non Newtonian liquids considering the different filling level of the reservoir.
Numerical Simulation of the Impact on Wide Composite Sandwich Beam
Authors: Laš Vladislav , Mandys Tomáš , Kroupa Tomáš , Hynek Richard
Published: August 2014

This paper is focused on the development of a finite element model describing the behaviour of sandwich structure with composite skins and low density foam core in case of low-velocity transverse impact load. The material properties of foam core and composite skins were determined using tensile tests. The non-linear elastic behaviour of composite skins was implemented into the commercial finite elements software using material subroutine. The identification process combining finite element simulations and mathematical optimization method was used for the determination of material parameters of the composite skins. The foam core was modelled using Abaqus Low-density Foam material model considering the non-linear behaviour in case of tension.
An Active Control of the Thin-Walled Mechanical Systems
Authors: Šolek Peter , Maták Marek
Published: August 2014

This article deals with the influence of optimal actuator and sensor placement on the active control of thin-walled mechanical systems. The approach used for optimal actuator and sensor placement is based on the evaluation norms and. The optimal actuator and sensor placement satisfied the requirements on the controllability, observability and spillover prevention. The investigation of the optimal placement of actuators and sensors is demonstrated on the active vibration of the thin-walled two dimensional mechanical systems.
Modal Analysis of Circular Plates
Authors: Bocko Jozef , Sivák Peter , Delyová Ingrid , Šelestáková Štefánia
Published: August 2014

In engineering practice, some of the structural elements take the form of a thin planar plate. For such elements, it is sometimes important to consider dangerous condition of resonance. A structural element cannot operate in the range of resonant frequencies. It is therefore necessary to determine natural frequencies and normal modes of vibration of such structural elements. Parts of the paper are the results of the analysis of natural frequencies and normal modes of vibration using FEM program Cosmos. The subject of the analysis was a thin flat circular plate considered in three modifications, i.e. free thin circular plate without hole, a thin circular plate without hole, clamped on the outer periphery, a thin circular plate with a hole, clamped on the outer and inner circumference. At the same time, Chladni patterns were obtained. They were created using the Matlab system and extraction of the outputs of the Cosmos program.
Numerical Analysis of Stress States for Graphitic Cast Iron Structures
Authors: Vavro Jan , Vavro Ján , Kováčiková Petra , Kopas Peter , Handrik Marián , Bezdedová Radka
Published: August 2014

The presented work is focused on the analysis of stress distribution around the graphitic particles in microstructure of ductile cast iron with the spheroidal shape of graphite (SGCI) and grey cast iron with the lamellar shape of graphite (LGCI). The analysis was made with help of the finite element method in the software system ADINA.v.8.6.2. On the basis of the real structure, the finite element method was used for creation of the model which was subsequently used for calculation of the distribution of stress in the material structure. The input data for numerical analysis were obtained on the basis of evaluation of the structure with help of image analysis. The numerical analysis proved that graphitic particles in the matrix cause the accumulation of stress and the distribution of given stress depends on the shape of the graphitic particles.
Regression Model Design for the Prediction of Pipe Conveyor Belt Contact Forces on Idler Rollers by Experimental Tests
Authors: Molnar Vieroslav , Fedorko Gabriel , Stehlíková Beáta
Published: August 2014

In this paper there is presented a possibility to estimate, with a sufficient accuracy, contact forces on idler rollers of hexagonal idler housing in case of the pipe conveyor belt. This prediction is based on values of tension forces that are measured experimentally. The calculated regressive models are able to predict contact forces in individual positions of idler rollers with suitable correctness. The measurements of tension forces were carried out on a static model of a pipe conveyor. This static model is able to simulate real operational conditions of idler rollers, which guide the conveyor belt. In this way it is very simply possible to determine contact force values in the individual positions of idler rollers. Information about contact forces is useful for designers and for users of the conveyor belts, as well.
Passive Suspension of a Working Machine Horizontal Platform
Authors: Orečný Martin , Segla Štefan
Published: August 2014

The paper deals with a dynamic analysis of a passive suspension of a working machine horizontal platform and the two configurations of its suspension system. For the individual alternatives the mathematical models are formulated. The rigid horizontal platform is excited in two perpendicular horizontal directions by kinematic excitation, which was acquired by an experimental measurement of the displacements of the working machine cabin. For the arbitration of which configuration is better two criterions were considered. The first criterion was the effective displacement in two perpendicular directions of the suspended horizontal plate and its rotation around the vertical axis. The second criterion was the effective acceleration of the horizontal plate in two perpendicular directions and the angular acceleration around the vertical axis. The numerical simulations shown that the first alternative (marked as A) gives better results in the reduction of vibration.
The Use of Nonlocal Theory for Bending Vibrations of Single-Walled Carbon Nanotubes
Authors: Bocko Jozef , Lengvarský Pavol
Published: August 2014

In the paper are investigated the eigenfrequencies of single-walled carbon nanotubes (SWCNTs) by the analytical method based on nonlocal theory of beam bending. A continuum approach is applied for eigenfrequency computation of SWCNTs with four types of beam end conditions: clamped-free (C-F), simply-simply supported (S-S), clamped-simply supported (C-S) and clamped-clamped (C-C).
Influence of Severe Plastic Deformation on the Properties of a Selected Aluminium Alloy
Authors: Lacková Petra , Buršák Marián , Kvačkaj Tibor , Tiža Juraj
Published: August 2014

This article deals about structural, mechanical and fatigue properties of an aluminium alloy EN AW 6061 (AlMg1SiCu) reinforced with SiC particles, in the initial state and in the state after intensive plastic deformation acquired by the process ECAP (Equal Channel Angular Pressing). In both states microstructures were evaluated with metallographic procedures, mechanical properties (yield strength, ultimate tensile strength, elongation) and fatigue curve at cyclic load in torsion. The main goal of this article was to study the influence of the intensive plastic deformation on an aluminium alloy reinforced with SiC particles prepared by powder metallurgy technique.
Model of the Decision Support System under Condition of Non-Determination for Manufacturing Process Support
Authors: Klimeš Cyril , Farana Radim
Published: August 2014

Decision support systems mean interactive computer systems, which assist to decision making subjects to utilize both data and models to solve non-structured issues. These systems were established mainly on the basis of a risk analysis, utilizing the experience/skills, conclusion making and intuition, enabling very fast and flexible analysis with a good response, enabling the application of manager intuition and judgment this way. However, such decisions are often based on uncertain information. This fact requires the establishment of other decision support models.
Spectral Differentiation of Spectometers and their Application in Mechatronic Systems
Authors: Ivanka Ján , Adámek Milan
Published: August 2014

Spectometers are specified and classified according to extent, differentiation ability, sensitivity (permeability), dynamics, dimensions, construction and software. Manufactures supply series of more or less universal spectometers and, moreover, it is possible to suggest and to use specially assembled and adapted device for the majority of special applications. The use of spectometers in the field of mechatronic systems, which are comprising principles and bases of mechanical engineering, control systems, electronics and informatics, is indisputable and it holds important position especially in the chemical analysis of metal and metal materials area, in the control of chemical ingredients of materials, identification of alloys, qualities and material standards, manufacture process control inclusive of material identification – PMI, QC, QA both in internal section and in external material production section, where there in a horizontal integration.
The Analysis of Different Stochastic Patterns during Loading in Plastic Area Using DIC Method
Authors: Schrötter Martin , Hagara Martin , Kalina Matúš
Published: August 2014

The aim of this article is to present the influence of stochastic pattern on results accuracy of digital image correlation method in plastic areas. The various types of stochastic patterns were applied on testing specimens which were then tensioned. There was correlated the intensity of black and white color (denoted as grey value) dispersed on a specimen, then the mean value of estimated error for unloaded state as well as state of highest measured deformation and finally the amount of non-correlated facets. Also the maximal deformation of specimens was compared by which the damage of stochastic pattern emerged.
The Influence of Facet Size on the Accuracy of Modal Parameters Determined by Digital Image Correlation Technique
Authors: Huňady Róbert , Hagara Martin , Šimčák František
Published: August 2014

The paper deals with measurements of modal parameters using high-speed digital image correlation and assesses how the size of image elements (facets) influences the accuracy of modal parameters of the analyzed structure. The facet size is an important parameter that significantly affects the correlation process and its results. In the paper the experimental modal analysis of steel circular plate that has been excited by the impact hammer is described. Correlation system Q-450 Dantec Dynamics was used to measure the responses of the analyzed structure.
Uncertainty of Dust Mass Concentration Measurement
Authors: Dovica Miroslav , Maxim Vladislav , Kelemen Michal , Kelemenová Tatiana , Virgala Ivan , Miková Ľubica , Duchoň František
Published: August 2014

Paper deals with dust mass concentration measurement in working environment. The measurement is focused to respirable dust fraction, which is dangerous for people. Light scattering principle of dust mass concentration measurement is used for this purpose. Also cyclone as mechanical way of separation of respirable fraction can be used for this purpose. Next problem is determination of uncertainty of this measurement.
Simulation and Analysis of Defect Distribution in Passenger Car Tire under Dynamic Loading
Authors: Vavro Ján , Vavro Ján , Kováčiková Petra , Kopas Peter , Handrik Marián
Published: August 2014

The paper deals with experimental simulation measuring and the analysis of defect distribution in passenger car tire under dynamic loading. The main reason for detection of defect extension is to recognize an influence of closed air, small bubbles, separations in tire and it is mainly connected with its quality during its service in a vehicle in terms of road safety. This analysis should help constructors to solve critical conditions in tire casing, whether material selection and individual components proportions are suitable and fit or even the whole construction of tire casing is suitable. The reason for detection of internal defects in tire casing is to avoid the wear of those tires which already contain some internal defects and already recognised separations, which could propagate during the movement of vehicles. This is closely connected with the occurrence of tire destruction and the main purpose is to prevent its critical status and later vehicle crash and human life menace.
Inverse Kinematic Model of Humanoid Robot Hand
Authors: Virgala Ivan , Gmiterko Alexander , Kelemen Michal , Miková Ľubica , Varga Martin
Published: August 2014

Our study deals with inverse kinematic model of humanoid robot hand. It is important for modeling to know biomechanics of biological human hand, what is discussed in the second section. Based on theoretical aspect of kinematic configuration of the hand, the hand consisting of 24 degrees of freedom is assumed. Subsequently, there are four numerical methods of inverse kinematics used, namely pseudoinverse method, Jacobian transpose method, damped least squares and optimization method. Each of them is simulated in software Matlab and the results are compared and discussed. In the conclusion the best method from the view of solution time and number of iteration cycles is evaluated.
Kinematic Analysis of Crank Rocker Mechanism Using MSC Adams/View
Authors: Delyová Ingrid , Hroncová Darina , Frankovský Peter , Dzurišová Eva , Rákay František
Published: August 2014

The aim of this article is to develop a functional model of crank rocker mechanism in ADAMS/View software and subsequent complete kinematics analysis hereof. We analyze the movement of the members of the mechanism. The kinematic analysis was performed analytically and graphically. The mechanism has been modeled too and solution was drafted in the program MSC ADAMS/View. The next stage is the simulation with a set of different parameters to obtain its kinematic analysis. Finally, the data gathered in this process is compared and evaluated. Finally, the paper presents the results with graphical representation of parameters such as speed, distance and acceleration.
Kinematic Analysis Planar Mechanism of a Pump Using MSC Adams
Authors: Šarga Patrik , Hroncová Darina
Published: August 2014

The aim of the paper is to present the application of MSC Adams/View for kinematic analysis of motion of a pump mechanism. The first section describes the program Adams and its modules Adams/View, work with this module and its basic operation. In the following section there is the kinematics solved using numerical methods. This work deals with the assembly of the models in Adams/View, simulations, plotting of the trajectory of the mechanisms points, and kinematic parameters of mechanism members. The software shows displacement, velocity and acceleration, angular velocity and angular acceleration. Finally, the paper presents the results with graphic representation of parameters such as displacement, velocity and acceleration.
Effect of Weight Percentage on Mechanical Properties of Boron Carbide Particulate Reinforced Aluminium Matrix Composites
Authors: Dhinakaran S , Moorthy T.V.
Published: August 2014

Aluminium matrix composites (AMCs) play a vital role as advanced engineering materials due to their excellent mechanical properties like light weight, strength, wear resistance, toughness. This work focuses on the fabrication of aluminium (AA6061) matrix composites reinforced with 3%, 6% and 9% B4C particle of 104μm using stir casting method. The wettability of B4C particles in the matrix has been improved by adding K2TiF6 flux in to the molten metal. The microstructure and mechanical properties of the fabricated AMCs are analyzed. Uniform distribution of B4C particle in the matrix was confirmed using scanning electron microscope (SEM) images. It was found that the tensile strength and hardness of the fabricated AMCs increases with increased B4C particle content.
Harmonic Drive Products in Robotic
Authors: Buss Alois , Trhoň Vladimír
Published: August 2014

This subscription explains after introducing of the company Harmonic Drive AG functional principle of Harmonic Drive® gears and their advantages. Especially are ushered components set, units and servo actuators for the construction of robotic arms and manipulators.
Optimal Design of Robot Gripper Mechanism Using Force and Displacement Transmission Ratio
Authors: Krenich Stanisław
Published: August 2014

The paper presents an approach to design optimization of robot gripper mechanism. There are two different optimization criteria, a force transmission ratio and a displacement transmission ratio, considered. In order to generate the optimal solutions, three algorithms are applied. There are gradient based method, random search method and evolutionary algorithm used. The results and a comparison with the industrial gripper, show possibility to improve parameters of the gripper mechanism using optimization procedure. They show as well, that conventional algorithms often fail during optimization process and the most suitable methods in this case are evolutionary algorithms.
New Generation of Mobile Platform of Service Robot for Motion along Vertical Walls
Authors: Horák Marcel , Novotný František , Starý Michal , Černohorský Josef
Published: August 2014

The paper sums up results achieved during in the last few years of the development and research of service robots aiming their use for service applications on vertically oriented walls with predominantly smooth contact surfaces having minimal altitude unevenesses within the range ± 5 mm. Two robot generations are described step by step, and both of them use the same mechanical principle of the patented system of motion. The system uses the intermittent motion when positions of the robot legs and body alternate cyclically, and the appropriate gripping force of a holding-down system is realized by vacuum. As compared with the first version, the current one allows legs to move independent in part. In that way it is possible to compensate better variations of parallelism between a contact plane of the robot holding-down system and a vertical wall. Moreover, the robot is provided with a rotary unit making possible a rotation on the axis going through the robot center and being perpendicular to the contact plane, which guarantees a change in the robot orientation in the plane. As for drives, very compact rotary actuating mechanisms (servo drives) are used, having a high ratio of power parameters in relation to weight and dimensions, combined with a control based on an industrial PC.
Computer-Aided Design of Human Knee Implant
Authors: Zubrzycki Jarosław , Smidova Natalia
Published: August 2014

This paper presents the design process of human knee implant. The design has been used CT scans from the actual clinical trials. To make a 3D model from CT images Materialise Mimics software was used. On the basis of the resulting model, further work was carried out to obtain a STL model is necessary to carry out research numerical finite element method. This paper presents the results of numerical only one element of which is the medical polyethylene insert, which will act as a prosthetic meniscus.
Robotic Cell Control System Standardization
Authors: Mudrák Maroš , Hubinský Peter , Mudráková Tatiana
Published: August 2014

Nowadays, in the modern manufacturing factories and in the companies engaged in the robotic cells manufacture it is necessary to optimize the production time, diagnostics and commissioning of the control system. The control system should meet with several criteria for the functionality and transparency. These criteria can be achieved by introducing the program control standardization. Well designed and tested control algorithms can reduce the time needed for the preparation and commissioning of the robotic cell. Ultimately, costs reduction for the preparation of such robotic cell, transparency and rapid response for errors diagnostics in the control system will be achieved.
Research and Development of Rehabilitation Robotics in Poland
Authors: Pilat Zbigniew , Klimasara Wojciech J. , Juszyński Łukasz , Michnik Andrzej
Published: August 2014

The market of rehabilitation robots has been recording slow, but steady growth for several years and this trend is expected to continue. Therefore, more and more commercial companies offering complete solutions have been entering the market and a new separate branch within the medical devices manufacturing industry can now be distinguished. Moreover, global leaders among rehabilitation robot suppliers can be identified. Nevertheless, there is still room for new companies operating locally for the benefit of their communities. An adequate research & development base and the advancement of R&D works are necessary for the development of rehabilitation robot manufacturing in new countries. This article presents the situation in this field in Poland.
Robust Rubik’s Cube Detection Using Hough Transform and Advanced Clustering Functions
Authors: Ďurovský František
Published: August 2014

Presented paper describes vision-based algorithm for 2D Rubik’s cube state detection suitable for cases in which long-term fixed camera-cube position is not possible. The main focus was to provide a robust algorithm for position and color detection in order to overcome problems observed in previous version. First part of paper describes Hough transform and advanced clustering functions that were used for cube position detection. Described algorithm provides robustness to strong occlusions and various lighting conditions. Second part of paper describes color detection algorithm and problems of prior classification in various color spaces.
Analysis of Power Relations in the Design of Effector for Unilateral Gripping with Active Vacuum Suction Cup
Authors: Tuleja Peter , Šidlovská Ľuboslava
Published: August 2014

This contribution present the process of projection of griping effector with active suction cups. It focuses on possible complication by solutions and estimates sequence of necessary calculations so that the designed gripper guarantied secure fixation of manipulated objects in time of handling work of robot.
Development of Robotic Vehicle in the Intermediate Category Suitable for Deployment in Rough Terrain
Authors: Vargovčík Ladislav , Jezný Jaromir , Šofránek Frantisek , Šarloši Juraj , Surovec Robert
Published: August 2014

This paper is dedicated to the development and implementation of a robotic vehicle in the intermediate category suitable for deployment in rough terrain for rescue and recovery purposes [1]. The requirements on the part of potential users have been clarified with the relevant departments such as the police, civil protection, Fire Corps, and army EOD specialists. On basis of analysis, categories of requirements were defined in the field of terrain and environment characteristics. The result of the development is a compact vehicle equipped with 6-legs for walking in combination with wheels at the end of the each leg for fast driving. In the front section there is free space for a special-purpose superstructure, in the standard package it consists of a handling arm with 6 degrees of freedom with a deadweight capacity of 200kg. All actuators, including the wheel drive, are hydraulic, the hydraulic pump and electric generator are driven by built-in internal combustion engine.
A Plea for the Cognitive Solution Attempt: Cognitive Robotics, Cognitive Factory and Cognitive Solutions. Cognitive Robotics as a Model for the Development of Cognitive Solutions
Authors: Haun Matthias
Published: August 2014

A cognitive approach conceptualizes the goods producing enterprise and its production factors (such as divisions, units, sections or resources like machines or robots) as well as the enterprise’s products (such as valves) as cognitive models. These models are then put into shape with the help of cognitive computing techniques.
Modular Approach for Design of Technology Units with Rotary Positioning Modules
Authors: Semjon Ján , Varga Jozef , Sukop Marek , Cop Vladimir , Popcak Marian
Published: August 2014

Rotary axis of positioning and handling unit or rotary positioning module is autonomous, functional and construction module for rotary positioning axes. It has integration function with intelligence for mechanic and driving ability to connect with other modules into one higher function machinery systems. Rotary positioning module is node of device, which must perform driving rotary movement with required to speed and precision of positioning. This node of device can be located in vertical position or horizontal position and it can consist from construction with one axis or more axes. RPMs are built-in and used in areas of manufacture, robotic, and other areas like rotary positioning axis of action mechanisms machinery systems.
Analysis of Design Today Exoskeletons in the Health Field
Authors: Hoľvová Patrícia
Published: August 2014

Article deals with the analysis of design exoskeleton for people with disabilities, in order to analyze significant events that are currently crucial in the creation or modification of various visual styles in design. The exoskeleton is carryable robotic device connected to the human body. Its design and of course its functionality modified and improved in time. Aesthetics of exoskeletons was influenced by on which elements they are based in designing - the predominance of a particular element decides how it is eventually perceived. An important part of creating ideas is to establish criteria that will set the direction and certain limits. The objective is also to find the most important connectins of shape, color and material features that make up a coherent design.
Development of Motion Control of Legs in Six-Legged Robotic Vehicle
Authors: Fetyko Ján , Jezný Jaromir , Üveges Róbert , Fedák Viliam
Published: August 2014

The paper describes control structure for driving system of a leg in six-legged robot vehicle. It can walk using locked wheels or it can roll on unlocked wheels. The leg joints are driven by hydraulic actuating units. Two different control structures are analyzed – control of a hydraulic cylinder through a mechanical gear and a structure for control of two hydraulic cylinders through a double eccentric gear mechanism. For control of the actuating units a conventional cascade structure with PI controllers completed by pre-compensation of controlled and observed variables is used. The performance of the structure has been proved on experimental stand and the experimental results are reported.