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IEEE International conference on Industrial Informatics (INDIN)

作者： Niladri Das Samrat Dutta Sunil Kumar Reddy Laxmidhar Behera Department of Electrical Engineering Indian Institute of Technology Kanpur Kanpur India

Kinematic motor behaviour of robots can be encoded using dynamical systems. These dynamical systems are learnt from human demonstrations to generalize human like motions. The size of the demonstration space involving a robot usually being large, it is not possible to provide all the demonstrations for robot's learning. Hence, it requires an efficient learning architecture that is able to generalize for unseen contexts. In the proposed algorithm, we model the movements, shown in the human demonstrations, as non-linear multivariate dynamics using mixture of Gaussians. Generally, in non-linear multivariate modelling approach pertaining to programming by demonstration, requires structured demonstrations i.e. it always requires to have a fixed and unique equilibrium point during the learning phase. The proposed method can relax these constraints and has the following advantage over the existing work: first, it would be possible to learn from any demonstration which is not constrained to have always the same equilibrium point; second, it would be possible to capture the variations in movement patterns depending upon the position of the equilibrium point. The proposed algorithm has been implemented using Barrett WAM and experimental results have been compared with existing approach.

关键词： Trajectory Testing Heuristic algorithms Encoding End effectors Computational modeling

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Price-maker wind power producer participating in a joint day-ahead and real-time market

Price-maker wind power producer participating in a joint day...

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International conference on European Electricity Market, EEM

作者： Stefanos Delikaraoglou Athanasios Papakonstantinou Christos Ordoudis Pierre Pinson Dept. of Electrical Engineering Technical University of Denmark Lyngby Kgs.

The large scale integration of stochastic renewable energy introduces significant challenges for power system operators and disputes the efficiency of the current market design. Recent research embeds the uncertain nature of renewable sources by modelling electricity markets as a two-stage stochastic problem, co-optimizing day-ahead and real-time dispatch. In this framework, we introduce a bilevel model to derive the optimal bid of a strategic wind power producer acting as price-maker both in day-ahead and real-time stages. The proposed model is a mathematical Program with Equilibrium Constraints (MPEC) that is reformulated as a single-level Mixed-Integer Linear Program (MILP), which can be readily solved. Our analysis shows that adopting strategic behaviour may improve producer's expected profit as the share of wind power increases. However, this incentive diminishes in power systems where available flexible capacity is high enough to ensure an efficient market operation.

关键词： Wind power generation Real-time systems Stochastic processes Uncertainty Production Electricity supply industry Power systems

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On mathematical modelling of the human arm using switched linear system 10

On mathematical modelling of the human arm using switched li...

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10th International conference on mathematical Problems in engineering, Aerospace and Sciences (ICNPAA)

作者： Babiarz, Artur Silesian Tech Univ Inst Automat Control PL-44100 Gliwice Poland

ISBN: (纸本)9780735412767

The article presents a novel approach to modelling human arm using switched linear systems. The linear and nonlinear second-order differential equations are shown for two-link arm moving in the horizontal and vertical planes. Linear equations in the state space have been formulated for these two objects. The next step is to present a switched linear system. Switching function is modeled as dependent on the state of the system. Finally, we are shown the division of the state space and linear equations describing the switched system for the vertical and horizontal two-link human arm.

关键词： human arm switched linear systems state-depended switched systems

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Energy evaluation of an absorption heat transformer operating with water-carrol solution by means of mathematical programming

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Chemical engineering Transactions 2014年第Special Issue期39卷 1477-1482页

作者： Sánchez-Martínez, Juan R. Martínez, Antonio Rodríguez Romero, Rosenberg J. Ibarra-Bahena, Jonathan Ponce-Ortega, José M. Serna-González, Medardo Engineering and Applied Science Posgraduate School Universidad Autónoma Del Estado de Morelos Av. Universidad 1001 MorelosCP 62209 Mexico Engineering and Applied Science Research Center Universidad Autónoma Del Estado de Morelos Av. Universidad 1001 MorelosCP 62209 Mexico Chemical Engineering Department Universidad Michoacana de San Nicolás de Hidalgo Morelia58060 Mexico

ISBN: (纸本)9788895608303

The objective of this work is an energy evaluation based on the coefficient of performance (COP) of an experimental absorption heat transformer (AHT) operating with Water-Carrol solution. The COP is a measure of the thermal efficiency of the system. An optimization tool was used, as it is mathematical programming. The mathematical model was obtained by means of mass and energy balances for each stage of thermodynamic cycle and global balances of AHT. Design parameters (i.e. effectiveness of the economizer), correlations of thermodynamic properties of water and Water-Carrol solution (i.e. specific enthalpy (H), equilibrium temperatures and concentrations) have been used. The optimal values of decision variables to maximize the COP (objective function) are determined using a mathematical programming formulation. The model was programmed in the General Algebraic modelling System (GAMS) software. Energy performance curves were developed in order to show and establish the best behaviour of the COP in function of the decision variables. Copyright © 2014, AIDIC Servizi S.r.l.

关键词： Energy conservation

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Fitting a circular distribution based on nonnegative trigonometric sums for wind direction in Malaysia

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AIP conference Proceedings 2015年第1期1643卷 305-311页

作者： Nurulkamal Masseran Ahmad Mahir Razali Kamarulzaman Ibrahim Azami Zaharim Kamaruzzaman Sopian Centre for Modelling and Data Analysis (DELTA) School of Mathematical Sciences Faculty of Science and Technology Universiti Kebangsaan Malaysia 43600 UKM Bangi Malaysia Project Group of Renewable Energy Resources Analysis Policy & Energy Management Renewable Energy Niche Solar Energy Research Institute (SERI) Universiti Kebangsaan Malaysia 43600 UKM Bangi Malaysia

Wind direction has a substantial effect on the environment and human lives. As examples, the wind direction influences the dispersion of particulate matter in the air and affects the construction of engineering structures, such as towers, bridges, and tall buildings. Therefore, a statistical analysis of the wind direction provides important information about the wind regime at a particular location. In addition, knowledge of the wind direction and wind speed can be used to derive information about the energy potential. This study investigated the characteristics of the wind regime of Mersing, Malaysia. A circular distribution based on Nonnegative Trigonometric Sums (NNTS) was fitted to a histogram of the average hourly wind direction data. The Newton-like manifold algorithm was used to estimate the parameter of each component of the NNTS model. Next, the suitability of each NNTS model was judged based on a graphical representation and Akaike’s Information Criteria. The study found that the NNTS model with six or more components was able to fit the wind directional data for the Mersing station.

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Releasing energy of compromised nodes in a secured heterogeneous Ad-Hoc Network(MANETs)

Releasing energy of compromised nodes in a secured heterogen...

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International conference on Advanced Computing and Communication Systems (ICACCS)

作者： Shanthkumar Biradar Sushma B Malipatil Chandrakant Naikodi Dept. of Computer Network and Engineering Cambridge Institute of Technology Bangalore India Dept. of Computer Science and Engineering Vijjaya Vittala Institute of Technology Bangalore India Dept. of Computer Science and Engineering Cambridge Institute of Technology Bangalore India

Heterogeneous Nodes in a Mobile Ad Hoc NET-work(MANET) are having very constrained resources like memory, bandwidth, CPU speed, battery life etc. Here, Heterogeneous Nodes means, all/few nodes are having variety of functionality. Irrespective of having higher secured nodes and security algorithms in MANETs, some time, the honest nodes can be accessed by fraud/malicious nodes or simply attacked by cracking security walls, in the rare case a node itself can also turn into a malicious node or acting on abnormal behaviour. This kind of scenario makes hard for tuning, hence human may not be able to acquire and catch a fraud/malicious/turned node to avoid adversary affect or misusing node's data for different purpose which is hazardous in some cases like Border Monitoring. In this novel approach, we tweak such scenarios, discharging the energy of heterogeneous node which is a valuable resources of MANETs called as retiring or invalidating a node, hence such node may not be a part of genuine communication.

关键词： Ad hoc networks Mobile computing Security mathematical model Batteries Routing Receivers

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mathematical modelling of Thin-Walled Cold-Rolled Cross-Section

Mathematical Modelling of Thin-Walled Cold-Rolled Cross-Sect...

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6th International Scientific conference on Dynamic of Civil engineering and Transport Structures and Wind engineering (DYN-WIND)

作者： Flodr, Jakub Krejsa, Martin Mikolasek, David Sucharda, Oldrich Zidek, Libor Tech Univ Ostrava VSB Fac Civil Engn Dept Struct Mech Ludvika Podeste 1875-17 Ostrava 70833 Czech Republic Tech Univ Ostrava VSB Fac Civil Engn Lab Bldg Mat Ostrava 70833 Czech Republic

ISBN: (纸本)9783038351979

The purpose of the paper is to perform a static analysis of a thin-wall cold-rolled steel cross-section of a trapezoidal sheet by means of a mathematical model developed in ANSYS, commercially available software applications. The trapezoidal sheets are used typically as an external cladding which covers the structures of steel halls. Investigating into behaviour of the trapezoidal sheets subjected to extreme loads represents an urgent issue in wind engineering. A physical tension test has been performed in order to verify and confirm the mathematical model. Experiments have been performed to prove results of the static analysis into the behaviour of a load-carrying structure formed by a thin-wall cross-section.

关键词： numerical modelling wind engineering thin-walled cold-rolled cross-section steel structure trapezoidal sheet finite element method FEM ANSYS

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Traffic anomaly based detection: Anomaly detection by self-similar analysis

Traffic anomaly based detection: Anomaly detection by self-s...

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International conference on Control, Electronics, Renewable Energy and Communications (ICCEREC)

作者： Hanif Nurohman Yudha Purwanto Hafidudin Department of Computer Engineering Telkom Engineering School Telkom University Bandung Indonesia Department of Electrical Engineering Telkom Engineering School Telkom University Bandung Indonesia

Denial of Service (DoS) is a hot topic phenomenon lately. The intensity of DoS attacks increasing every day with the discovery of a new attack with the same type which is Distributed Denial of Service (DDoS). Both, attack the victims by flooding a lot of packet to the traffic channels at a time. This makes the flow of packets to the victim's becomes choked and victim do not get the desired package because the density of traffic on its network. Traffic anomaly based is a good technique to detect DDoS attack. Traffic anomaly can be used by several method. One of them is self-similarity. Self-Similarity methods is suitable to the network traffic behaviour. Self-Similarity is a scale of invariant which always have the same. Today, self-similarity has been a dominant framework for modelling network traffic. It will show a plot of the traffic will have in common, even though it has a different time. For the result we use kolmogorv-smirnov to differentiate the anomaly and normal condition in each step of self-similarity. In normal condition Kolmogorov-smirnov test always give 0 and for anomaly condition give 1 for each step. 0 means that data were analysed didn't have a large difference. Otherwise data have a large difference. Hurst estimator provide 0,645 for normal condition. For anomaly condition, hurst estimator provide 1,443. This is compatible with previous research which states that the hurst exponent from nomal traffic will provide value between 0,5

关键词： Internet Computer crime Computers Telecommunication traffic Estimation mathematical model Renewable energy sources

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Petri net application in simulation of ambulatory processes

Petri net application in simulation of ambulatory processes

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Annual conference of Industrial Electronics Society

作者： Fabio Lima Matheus F. R. Cortez Patricia P. Schmidt Ana Karoline Silvério João Chang Industrial Engineering Department Sao Bernardo do Campo SP Brazil

This paper presents a simulation of an ambulatory processes using timed Petri net (TPN). The simulation considers the flow of patients in the biggest Brazilian cardiology hospital. The TPN is used as a decision support system (DSS) in order to improve the processes, to reduce the waiting time of the patients in the ambulatory and in this way to assure a high quality service to the patients. Simulations were carried out using the software Visual Object Net++. This is a free software and therefore the presented solution is a low cost solution. To provide a low cost solution is very important since the hospital is kept from the government and operates with limited financial resources. The patients' workflow in the hospital can be faced as a service and the modelling and optimization of these services bring more efficiency to the system as well as improve the human factors involved.

关键词： Petri nets Object oriented modeling Hospitals mathematical model Radiation detectors Decision support systems

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Prototyping and Flattening of the 3D Garment with Feature Recognition on a Scanned human Body

Prototyping and Flattening of the 3D Garment with Feature Re...

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2015 International conference on Simulation, modelling and mathematical Statistics(SMMS 2015)

作者： Dan-hua LI Ye YUAN Qing-fu LI School of Information Engineering Beijing Institute of Fashion Technology Department of Elements Beijing Institute of Fashion Technology

A flexible and intuitive prototyping approach for the 3D garment computer-aided system is proposed. The overall 3D garment pattern is divided into a series of developable 3D patches. Each of them is modeled as a ruled Bezier surface with its boundary curves being generated by corresponding control points. On one hand, the modeled 3D garment patch exhibits good fitness and individuation, on the other hand, the form of the ruled Bezier surface satisfying developable requirements enables the flattening from 3D space to 2D space to be realized easily with no any *** contrast with the existing approaches, the presented approach is provided with intuitiveness, efficiency and adaptivity to the human body shape, which accordingly promote the advances of automatic design to mass made-to-measure apparel products.

关键词： 3D prototype Developable surface Bezier surface Surface flattening

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