The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Analyzing the stochastic characteristics of electric consumption series in many countries shows the presence of atypical observations or outliers. Outliers are deviant data points that do not follow the model of the majority of observations. They significantly degrade the accuracy of conventional day-ahead estimation and forecasting methods even if they are present in a very low fraction. Thus, both...
It is very difficult to accurately control the speed of paper roller and sword roller of the paper cutting machine, and the proportions of two paces control have greater randomness. Alterable fuzzy-PI control arithmetic is put forward based on PLC. The alterable fuzzy controller and the PI adjustor are realized by PLC. This system has solved the problem that grain flow equilibrium, not stably does...
Numerical substructures adopt assumed hysteretic model in traditional substructure tests. The difference between the assumed model and true model might bring the extra large test error. To diminish the negative effort caused by the inaccuracy of the restoring model of numerical substructures, the hysteretic model of experimental substructures is identified on line and model of the part in numerical...
This paper describes the comparative study of Proportional Integral (PI) and Backstepping controller for Buck converter with R-load and DC motor. Backstepping approach is an efficient control design procedure for both regulation and tracking problems. This approach is based upon a systematic procedure which guarantees global regulation and tracking. The proposed control scheme is to stabilize the...
Immune System is a complex system, has been consisting of complex elements with complex interactions, which has characteristics like autopoiesis and evolution. As a model for living systems, Capra Cognitive Framework introduces the main components of living systems. In this paper, functionality of the immune system is going to be perused and simulated through considering this framework. Biological...
In this paper the Biological Immune System is considered and a model based on Immune System behavior is proposed. For simulation of proposed model, agent's structure and the Multi Agent System are established based on the Capra Model. To implement the proposed model we used reaction agents in Netlogo environment. Finally the effects of learning, adaptation and interaction capabilities in system robustness...
We developed a new hand model for increasing the robustness of finger-based manipulations of virtual objects. Each phalanx of our hand model consists of a number of deformable soft bodies, which dynamically adapt to the shape of grasped objects based on the applied forces. Stronger forces directly result in larger contact areas, which increase the friction between hand and object as would occur in...
Computed Tomography Angiography (CTA) of the heart is a non-invasive procedure to rule out coronary artery disease or measure its extent and plan treatments and interventions. The need for coronary tree tracking methods that require minimum human interaction and produce accurate and robust measurements is therefore of great clinical importance. In this work we present a probabilistic coronary artery...
This paper proposes a novel steganography scheme based on Integer Wavelet Transform and Genetic Algorithm. The novel scheme embeds data in integer wavelet transform coefficients by using a mapping function based on Genetic Algorithm in an 8 × 8 block on the cover image. The optimal pixel adjustment process is applied after embedding the message. We employed frequency domain to increase the robustness...
Since the Pneumatic Muscle Actuator (PMA) has the characteristic of strong nonlinear and time lags, it is difficult to establish a precise mathematical mode. Model-Free Adaptive Control (MFAC) is an advanced control algorithm that does not require building an off-line mathematical model. This paper is basing on the feature of the PMA and presents a model-free adaptive control algorithm with the nonlinear...
In the conventional robust ISS (input to state stable) which satisfies control strategy, all parameters of the system must be known and deterministic. Since it confines the application, in this paper an attempt is made to create a bridge between two important design techniques, i.e., the robust ISS-satisficing control strategy and the variable universe indirect fuzzy control strategy, to offset this...
In this paper, we propose a method for detection and tracking of multiple planes in sequences of Time of Flight (ToF) depth images. Our approach extends the recent J-linkage algorithm for estimation of multiple model instances in noisy data to tracking. Instead of randomly selecting plane hypotheses in every image, we propagate plane hypotheses through the sequence of images, resulting in a significant...
Current generation of industrial MPC technology has two main disadvantages: 1) it is very costly to implement and to maintain an MPC system; 2) the performance in disturbance reduction is low. To solve these two problems, an adaptive MPC technology is introduced. It consists of three modules, a Control Module, an Identification Module and a Monitor Module. It can perform various steps of an MPC project...
In this paper, we adapt a recently proposed Internal Model Control (IMC) based controller design approach for simultaneous decoupling and disturbance rejection for a practical Multiple Input Multiple Output (MIMO) system, namely, for designing a controller for a Stirred Water Tank System (Two Input Two Output). While retaining the central aspect of the reported method, namely using the off-diagonal...
A new integrated system of visible free space optic (VFSO) and broadband powerline communication (BPLC) that applies the concepts of fuzzy logic for channel equalization is proposed. Having used already installed powerline cables and white LEDs as a communication channel this system has the advantage of low cost and easy implementation for data transmission. In this system the created intersymbol...
In this paper, we address the problem of actuator fault detection and estimation for a plant in the presence of external disturbances. We design a robust fault estimation technique based on an adaptive observer with enhanced speed of adaptation. The construction of the observer is carried out through a transformation of the plant model into its special coordinate basis (SCB) form. This transformation...
In this paper different approach of adaptation mechanism for fuzzy model reference learning control (FMRLC) method will be introduced. In contrast to original method the proposed procedure guarantees continuity of the fuzzy controller that in reward results in its smooth input-output behaviour (mapping) that eliminates undesirable abrupt changes in the control signal. Additionally, the proposed method...
In this paper, we propose a new method to enhance the performance of digital image watermarking based on pixels modification. The proposed method is implemented in both watermark embedding and retrieving processes. In the embedding process, an averaging technique is applied to the luminance components of the host image in order to obtain a better fine tuned watermark signal strength. In the retrieval...
Backlash nonlinearity is caused by the gap in the mechanical transmission link, and it poses a problem whenever there is a speed and position mismatch between the driving and driven side. In this paper, switched hybrid approach has been adopted to model and control the systems with backlash nonlinearity. A switched hybrid system consists of multiple subsystems with a particular subsystem active at...
We present a statistical approach to distributed detection of local latency shifts in networked systems. For this purpose, response delay measurements are performed between neighbouring nodes via probing. The expected probe response delay on each connection is statistically modelled via parameter estimation. Adaptation to drifting delays is accounted for by the use of overlapping models, such that...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.