检索结果-内蒙古大学图书馆

Manufacturing Technology 2015年第3期15卷 5-6页

作者： Božek, Pavol Nikitin, Yuri Bezák, Pavol Fedorko, Gabriel Fabian, Michal Institute of Applied Informatics Automation and Mathematics Slovak University of Technology Hajdóczyho 1 Trnava917 24 Slovakia Department of Mechatronic Systems Kalashnikov Izhevsk State Technical University Izhevsk Russia Technical university Kosice Slovakia

The paper addresses the integration of the inertial navigation unit implemented into the system of controlling the robot. It analyses dynamic properties of the sensors of the inertial unit, e.g. gyroscopes and accelerometers. The implementation of the original system of controlling the robot on the basis of autonomous navigation systems into the production system is a dominant part of the paper. Copyright © 2015. Published by Manufacturing Technology. All rights reserved

关键词： Robots

来源：评论

学校读者我要写书评

暂无评论

Essential traffic parameters for shared memory switch performance 1

引用

22nd International Colloquium on Structural Information and Communication Complexity, SIROCCO 2015

作者： Eugster, Patrick Kesselman, Alex Kogan, Kirill Nikolenko, Sergey Sirotkin, Alexander Purdue University LafayetteIN United States Technical University of Darmstadt Darmstadt Germany Google Inc. CA United States IMDEA Networks Institute Madrid Spain National Research University Higher School of Economics St. Petersburg Russia Steklov Institute of Mathematics St.Petersburg Russia International Laboratory for Applied Network Research National Research University Higher School of Economics Moscow Russia St. Petersburg Institute for Informatics and Automation of the RAS St. Petersburg Russia

ISBN: (数字)9783319252582

ISBN: (纸本)9783319252575

Cloud applications bring new challenges to the design of network elements, in particular accommodating for the burstiness of traffic workloads. Shared memory switches represent the best candidate architecture to exploit buffer capacity;we analyze the performance of this architecture. Our goal is to explore the impact of additional traffic characteristics such as varying processing requirements and packet values on objective functions. The outcome of this work is a better understanding of the relevant parameters for buffer management to achieve better performance in dynamic environments of data centers. We consider a model that captures more of the properties of the target architecture than previous work and consider several scheduling and buffer management algorithms that are specifically designed to optimize its performance. In particular, we provide analytic guarantees for the throughput performance of our algorithms that are independent from specific distributions of packet arrivals. We furthermore report on a comprehensive simulation study which validates our analytic results. © Springer International Publishing Switzerland 2015.

关键词： Memory architecture

来源：评论

学校读者我要写书评

暂无评论

Analysis and evaluation of differences dimensional products of production system

引用

applied Mechanics and Materials 2014年 611卷 339-345页

作者： Božek, Pavol Pokorný, Peter Institute of Applied Informatics Automation and Mathematics Slovak University of Technology Hajdóczyho 1 917 24 Trnava Slovakia Institute of Production Technologies Slovak University of Technology Bottova 25 917 24Trnava Slovakia

Logistics is primarily to address issues with whose functional, organizational, personnel and material means can be improved and optimize the entire course material flow businesses, which shall logistics integration business functions. Production logistics means a sum of logistical tasks and measures for preparation and execution of the production process. Includes all activities associated with material and information flows of raw materials, auxiliary and production materials from the warehouse to the production of raw materials and semi-finished goods from the warehouse and purchased parts through the various steps of the manufacturing process including all buffer stores, through the installation of the finished goods warehouse. © (2014) Trans Tech Publications, Switzerland.

关键词： Warehouses

来源：评论

学校读者我要写书评

暂无评论

Timing calculations for three level dodecagonal space vector structure from reference phase voltages

Timing calculations for three level dodecagonal space vector...

引用

Annual Conference of Industrial Electronics Society

作者： R. Sudharshan Kaarthik K. Gopakumar Carlo Cecati Istvan Nagy Dept. of Electronic Systems Engineering Indian Institute of Science Bangalore India Dept. of Industrial and Information Engineering and Economics University of L'Aquila L'Aquila Italy Dept. of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

A method to obtain pulse width modulation (PWM) timings for a three level dodecagonal (12-sided polygon) voltage space vector structure using only sampled reference values is proposed in this paper. Typical methods that are used to find PWM timings for dodecagonal SV structures use modulation index and the reference vector angle to get the timings by using trigonometric calculations. This method requires look-up tables, angle estimation making it difficult to implement in closed loop systems. The proposed method requires only two additions to compute these timings. For multilevel case, typical iterative methods need timing calculations (matrix multiplications) to be performed for each triangle within a sector. The proposed method does not require any iterative searching for locating the triangle in which the tip of the reference vector lies. It is also is generic and can be extended to any number of levels with symmetric structures. The algorithm outputs the triangle number and the PWM compare values - that can be used by any carrier based PWM module to obtain space vector PWM like switching sequences. Extensive simulation and experimental results for steady state and transient conditions have been presented to validate the proposed method.

关键词： Timing Pulse width modulation Inverters Switches Induction motors Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Application of Neural Networks in Computer Security

引用

Procedia Engineering 2014年 69卷 1209-1215页

作者： Halenar Igor Juhasova Bohuslava Juhas Martin Nesticky Martin The Institute of Applied Informatics Automation and Mathematics Slovak University of Technology Trnava Slovakia

This contribution is focused on the insurance of control system data communication via neural network technologies in connection with classical methods used in expert systems. The solution proposed defines a way of data element identification in transfer networks, solves the transformation of their parameters for neural network input and defines the type and architecture of a suitable neural network. This is supported by experiments with various architecture types and neural network activation functions and followed by subsequent real environment tests. A functional system proposal with possible practical application is the result.

关键词： communication neural network security

来源：评论

学校读者我要写书评

暂无评论

Robust control synthesis for a class of distributed parameter systems

Robust control synthesis for a class of distributed paramete...

引用

15th International Carpathian Control Conference, ICCC 2014

作者： Belavý, Cyril Vitáloš, Filip Vlček, Marcel Šišmišová, Dana Michalečko, Marek Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology Bratislava Nám. slobody 17 812 31 Bratislava Slovakia

ISBN: (纸本)9781479935284

In the paper, the robust control of temperature fields of the casting mould in the benchmark casting plant is presented. Temperature fields of the mould are represented by dynamic models in the form of a finite-dimensional approximation of distributed parameter systems. Models are created by means of an experimental identification. The control synthesis is decomposed to the time and space domain. For the control synthesis with internal model control structure in the time domain, an uncertainty of the controlled system is considered and robust controllers are designed. © 2014 IEEE.

关键词： Robust control

来源：评论

学校读者我要写书评

暂无评论

Real-time diagnostics of mechanical failure for thin active cantilever beams using low-cost hardware 7

Real-time diagnostics of mechanical failure for thin active ...

引用

7th Forum Acusticum, FA 2014

作者： Takács, Gergely Institute of Automation Measurement and Applied Informatics Faculty of Mechanical Engineering Slovak University of Technology in Bratislava Námestie Slobody 17 Bratislava 1812 31 Slovakia

ISBN: (纸本)9788361402282

This paper discusses a real-time diagnostics algorithm applied to detect mechanical failure in thin beams subjected to active structural control. A thin aluminum cantilever is equipped with piezoceramic actuators, and its position is measured at the free end by an optical device. The dynamics of the beam is approximated using a second order state-space model, which is augmented by the unknown mass, stiffness, viscous damping and force conversion constants. This model is utilized in the extended Kalman filter (EKF) to observe dynamic states and parameters. The estimated parameters are used to compute the first damped resonant frequency of the active structure, which is assumed to diverge from the nominal condition in case a mechanical failure occurs. This algorithm is implemented on a low-cost computing hardware using automatic code generation and deployment. In the experimental validation procedure, the piezoceramic transducers are supplied with a pseudorandom-binary signal, then the weight of the beam is changed to emulate variations in its mechanical properties. The role of the proposed method is to estimate the physical parameters of the beam and to detect sudden or gradual changes in configuration. The presented results demonstrate the real-time ability to diagnose changes in the mechanical configuration of the active cantilever beam, while also confirming the implementation feasibility of the proposed approach on miniaturized and mass-produced embedded microcontrollers.

关键词： Failure (mechanical)

来源：评论

学校读者我要写书评

暂无评论

Precise 3D pose estimation of human faces

Precise 3D pose estimation of human faces

引用

9th International Conference on Computer Vision Theory and Applications, VISAPP 2014

作者： Pernek, Ákos Hajder, Levente Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 1111-Budapest Hungary Department of Automation and Applied Informatics Budapest University of Technology and Economics Muegyetem rakpart 3-9 1111-Budapest Hungary

ISBN: (纸本)9789897580093

Robust human face recognition is one of the most important open tasks in computer vision. This study deals with a challenging subproblem of face recognition: the aim of the paper is to give a precise estimation for the 3D head pose. The main contribution of this study is a novel non-rigid Structure from Motion (SfM) algorithm which utilizes the fact that the human face is quasi-symmetric. The input of the proposed algorithm is a set of tracked feature points of the face. In order to increase the precision of the head pose estimation, we improved one of the best eye corner detectors and fused the results with the input set of feature points. The proposed methods were evaluated on real and synthetic face sequences. The real sequences were captured using regular (low-cost) web-cams.

关键词： Face recognition

来源：评论

学校读者我要写书评

暂无评论

The issue of calculating elliptic trajectories

Manufacturing Technology

引用

Manufacturing Technology 2014年第4期14卷 561-566页

作者： Lozhkin, Alexander Abramov, Ivan Bozek, Pavol Nikitin, Yuri Departments 'Software' and 'Mechatronic Systems' M.T. Kalashnikov Izhevsk State Technical University Studencheskaya St. 7 Izhevsk426069 Russia Institute of Applied Informatics Automation and Mathematics Faculty of Materials Science and Technology Slovak University of Technology Hajdóczyho 1 Trnava917 24 Slovakia

The design of elliptic trajectories of kinematic mechanisms by classical method is a challenge. New method is proposed. Theoretical tests were conducted on a method. It can not be used for scaling and rotation. Some limitations are revealed as well. Geometric modeling showed the method can be applied to arbitrary curves. It should be noted that the theoretical and modeling researches of arbitary curves is not full. Simple robot was designed for processing ellipses. The design of the stand was assembled from aluminum profiles, linear modules and fasteners RK Rose + Krieger. Experiments have shown a difference between the theoretical and actual trajectory less than 5%. The error of stationing was 8,5% before using of the direct analytical method. © 2014. Published by Manufacturing Technology.

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Economic Size and Developmental Possibilities of Chosen Family Farms in Poland

引用

Agriculture and Agricultural Science Procedia 2015年 7卷 113-118页

作者： Magdalena Kołtun Sławomir Kocira Zbigniew Krzysiak Magdalena Ćwiklińska Anna Kocira Milan Koszel University of Life Sciences in Lublin Department of Machinery Exploitation and Management of Production Processes Głęboka 28 20-612 Lublin Poland University of Life Sciences in Lublin Department of Mechanical Engineering and Automation Głęboka 28 20-612 Lublin Poland University of Life Sciences in Lublin Department Applied Mathematics and Informatics Głęboka 28 20-612 Lublin Poland State School of Higher Education in Chełm Institute of Agricultural Sciences Pocztowa 54 22-100 Chełm Poland

The economic size of agricultural farms is defined by means of the standard output (SO). However, economic effects of these farms depend on the way of husbandry. The analysed family farms of the area ranging from 8.58 ha UAA to 150 ha UAA had economic sizes ranging from €9,737 to €24,9379. Such a range made it possible to create 4 groups of farms according to classes of the economic size ES6. Calculated developmental possibilities were from -1167 PLN·ha -1 UAA to 3880 PLN·ha -1 UAA. It was stated that with an economic increase of the economic size developmental possibilities increase which is indicated by positive average correlation between these variables. In the best situation, regarding developmental possibilities are large farms having 12 times more possibilities than small farms. Significant differences in developmental possibilities between analysed groups of farms were stated. Significant differences were not stated in the amount of direct subsidies. Significant differences were stated in received direct surplus between small and large farms.

关键词： developmental possibilities economic size farm size Gross margin

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：