This paper studies the problem of computing an input vector for a given pair of Artificial Neural Network (ANN) and output vector, which is a kind of inverse problem. This problem has potential applications in design ...
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ISBN:
(纸本)9781450361033
This paper studies the problem of computing an input vector for a given pair of Artificial Neural Network (ANN) and output vector, which is a kind of inverse problem. This problem has potential applications in design of new objects, especially in design of new chemical compounds. This paper focuses on ANNs in which activation functions are represented as continuous piece-wise linear functions, which can exactly represent ReLU functions and well approximate sigmoid functions. It is shown that this inverse problem can be formulated as a Mixed Integer Linear programming Problem (MILP) with O(vertical bar V vertical bar + n(b) variables and constraints, where V is a set of neurons in a given ANN and nb denotes the total number of break points over all activation functions f(nu), nu is an element of V .
Developing IoT, Data Computing and Cloud Computing software requires different programming skills and different programming languages. This cause a problem for many companies and researchers that need to hires many pr...
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ISBN:
(纸本)9781450347747
Developing IoT, Data Computing and Cloud Computing software requires different programming skills and different programming languages. This cause a problem for many companies and researchers that need to hires many programmers to develop a complete solution. The problem is related directly to the financial cost and the development time which are very important factors to many research projects. In this paper we present and propose the PWCT visual programming tool for developing IoT, Data Computing and Cloud Computing applications and Systems without writing textual code directly. Using PWCT increase productivity and provide researchers with one visual programming tool to develop different solutions.
The aim of the paper is to give the basic information about methods and approach to teaching programming for mobile applications. In the introductory part of the article we try to set out the objectives of teaching an...
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The aim of the paper is to give the basic information about methods and approach to teaching programming for mobile applications. In the introductory part of the article we try to set out the objectives of teaching and student entry requirements. Main stress is focused on clarifying the specifics that we have to consider during development process for the most used mobile platforms. At the end of article we try to explain current possible use of mobile devices in military area.
A nonlinear lattice driven by both ends is an interesting system to study two different physical problems: the statistical properties of turbulence and the control of the thermal flow in a solid state device. Both of ...
A nonlinear lattice driven by both ends is an interesting system to study two different physical problems: the statistical properties of turbulence and the control of the thermal flow in a solid state device. Both of these applications rely on nonlinearity that couples modes, shifts their vibrational frequencies, and, in a lattice, allows for the existence of discrete breathers. By introducing a special form of dissipation that mimics viscosity, we can show that such a nonlinear lattice exhibits properties which are strikingly similar to various experimental results obtained in a turbulent von Karman flow, while an appropriate choice of parameters allows a precise control of the heat flown in the lattice, and can even turn the system into a "thermal rectifier" which does not have the same thermal conductivity in the two directions. By providing a model sufficiently simple to be studied in details the application to turbulence may suggest some clues to understand general features of turbulence, while the possibility to control and direct a thermal flow, although it is still very far from a practical device, could open new possibilities for applications.
This paper investigates an upstanding nonlinear controller for controlling a single-degree-of-freedom shape memory alloy (SMA) actuated manipulator and proposes a novel nonlinear PID (NPID) controller suitable for rea...
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ISBN:
(纸本)9781424424252
This paper investigates an upstanding nonlinear controller for controlling a single-degree-of-freedom shape memory alloy (SMA) actuated manipulator and proposes a novel nonlinear PID (NPID) controller suitable for real time manipulator control applications. The salient features of this controller are that it has significant effects in reducing overshoot and settling time of position tracking system. A series of experiments have been performed in tracking both stationary and periodically varied reference signals. Experimental results are presented to show the effectiveness of the proposed controller in real time applications. A linear PID and a nonlinear PID-P-3 controller are also applied to the system to compare the performance.
Mobile phones play an important role in learning and teaching because they provide an environment for active learning and social interactions anytime and anywhere. With today's mobile phones, we can do many of the...
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ISBN:
(纸本)9781936338184
Mobile phones play an important role in learning and teaching because they provide an environment for active learning and social interactions anytime and anywhere. With today's mobile phones, we can do many of the tasks we can do with our PCs. They allow students to utilize videos, visualizations, interactive instructional materials, online homework, games, discussion groups/boards, demonstration projects, and many free applications, such as Smart Algebra, Space Time, etc. This paper describes how these tasks can be accomplished.
A direct method for creating a neural network to approximate an optimal feedback controller is presented in this paper. The method is direct in the sense that the weight adaptation is tied directly to the solution of ...
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ISBN:
(纸本)0780348605
A direct method for creating a neural network to approximate an optimal feedback controller is presented in this paper. The method is direct in the sense that the weight adaptation is tied directly to the solution of the optimal control problem. To achieve this goal, the optimal control problem is first converted into a parameter optimization problem with the weights and biases of the network being the adaptable parameters. Any state and/or control limitations are turned into the appropriate equality or inequality constraints. Then a nonlinearprogramming algorithm is used to solve the resulting constrained minimization problem. The method is demonstrated by solving three example optimal control problems of varying complexity. The conclusion section discusses recommendations for future improvements.
This paper presents a new approach for robust open-loop and closed-loop control of nonlinear processes with parameter uncertainties and a comparison with classical concepts. The approach leads to trajectories that sho...
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ISBN:
(纸本)9780780397958
This paper presents a new approach for robust open-loop and closed-loop control of nonlinear processes with parameter uncertainties and a comparison with classical concepts. The approach leads to trajectories that show small variations if uncertain parameters and uncertain initial conditions are present. The algorithm utilizes the Unscented Transformation. It allows a 2nd order approximation of the first two statistical moments of the system's output as a function of the stochastic system's state and uncertain model parameters. Because the numerical burden is low, it can be used for optimization based online closed-loop process control as well.
The problem of an energy dissipation optimization in a conductive electromagnetic media is considered. The domain is known a priori and is fixed throughout the optimization process. We apply a perturbed and damped int...
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The paper describes the design and implementation of a robot manipulation system on a hardware platform based on a Programmable Logic Controller (PLC) and The Robot Operating System 2 (ROS 2). The controlled robot is ...
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