Tafresh University

Maqolada ingliz tilini o‘qitish jarayonida mantiqiy fikrlashni shakllantirish orqali ta’lim samaradorligini oshirish usullari tahlil qilingan. Mantiqiy fikrlashning tilni anglash, tahlil qilish va ifoda etishdagi o‘rni ilmiy-nazariy asosda yoritilgan. Tadqiqot natijalari talabalarda mantiqiy fikrlash rivojlangan sari ingliz tilini o‘zlashtirish darajasi yuqorilashini ko‘rsatdi. Maqolada ta’lim jarayonida qo‘llanilishi mumkin bo‘lgan metodik tavsiyalar ishlab chiqilgan.

This paper addresses the synchronisation of multiweighted complex cyber-physical networks (MCCPNs) under the influence of interchange attacks based on sampled-state feedback. Such a system has been investigated for the first time against the impact of a newly introduced attack, called an interchange attack. In this type of attack, the attacker alters the address content of the data packets without manipulating the transmitted data. Multiweighted connections allow networks to model various interactions and communications with different levels of importance and impact. A Bernoulli random variable is used to describe the occurence of interchange attack, planned by an attacker. With the help of the Lyapunov-Krasovskii theory, some conditions are derived and formulated in terms of linear matrix inequalities (LMIs) to ensure the stability and stabilisation problem. To verify the effectiveness of the proposed method, two examples, one with the chaotic Chua's circuit and the other with the F-404 aircraft engine, are presented at the end.

1403 4 62 98 and advanced algorithms, including algorithms based on deep learning, has a low computational cost and can be implemented in real time on different types of smart mobile phones.Also, by adjusting the sensitivity of the software by the user, based on the detection of one or two open eyes in the area of the face and the time between two consecutive frames of not detecting open eyes, increasing the number of correct alarms and reducing the number of false alarms can be controlled.In this research to train and increase the accuracy of the intelligent model used, a database of 500 suitable images in different driving situations was prepared and used.Experimental results on 20 test videos in different driving situations show the proper performance of the designed system by creating 95% of the expected alarms.Based on the results of numerous and various experimental tests with the acceptable performance of the product of this applied research in detecting driver drowsiness and creating correct alarms, it seems that if used by drivers, it can prevent many car accidents.

ABSTRACT In this article, we propose an adaptive robust nonlinear optimal sliding mode control (SMC) using the optimal homotopy asymptotic method (RNOSC‐OHAM) for maximizing wind power capture. Because of the unstable nature of the wind and the presence of uncertainties and disturbances in the structure of the wind turbine, the optimal controller cannot provide robustness against uncertainties. Hence, we integrated this approach with a proportional–integral–derivative SMC (PID‐SMC) scheme to ensure the robustness of the system. The presented hybrid control input signal involves two components: a nonlinear optimal control law that provides the optimal performance of the nominal system and an adaptive PID‐SMC law. The adaptive PID‐SMC law employs a PID sliding surface along with adaptive mechanisms to create the robustness of the nonlinear wind turbine system. The nonlinear optimal control policy is designed by addressing the partial differential Hamilton–Jacobi–Bellman (HJB) equation. This equation is approximated using the OHAM. This combination strategy reduces the final time of the optimal control problems, provides desired responses and improves performance. Additionally, the RNOSC‐OHAM controller facilitates the safe performance of the wind turbine under uncertainties and maximizes the wind power captured. To evaluate the performance of RNOSC‐OHAM, the results of the presented algorithm are compared with some existing control schemes. The results indicate that the designed RNOSC‐OHAM controller is very rapid and needs few iterations and computational costs. Indeed, the present control scheme exhibits the best characteristics and has the fastest transient response. The RNOSC‐OHAM controller offers a proper balance between enhancing aerodynamic power capture and minimizing low‐speed shaft fluctuations using a small control input.

Successive earthquakes can bring about permanent displacements and a drop in frame resistance in subsequent cycles. Since a method for designing structures under these scenarios has barely been provided in the regulations, this paper examines the seismic performance of eccentrically braced frames (EBFs) in high‐strength steel frames with stainless steel links under different seismic sequences. To this end, EBFs with a variety of materials were analyzed under 16 scenarios with and without a seismic sequence in the OpenSees software. Interstory drift ratio, energy loss by links, as well as moment curvature curves were further reported and compared in sensitive stories under single and consecutive earthquakes. The results indicated that employing stainless links could reduce the interstory drift ratio in the middle stories. Moreover, a small increase in drift ratio was observed in some high‐strength steel EBFs, with stainless steel links frames after the successive shocks. Therefore, this type of frames experienced lower increase in energy dissipation after the successive shocks while this frame had more capacity of energy dissipation than other frames. The use of these frames will reduce the size of sections, lightening the system, and increase the capacity of energy loss, solving the risk of corrosion of the link beam.

ABSTRACTCogeneration sources are good choices for meeting the diversity of consumers energy demand. Recently, with the introduction of the microgrid (MG) concept, to increase security, reliability, and quality of the system, loads are fed locally by low‐scale generation units. In this work, a Combined Hydrogen, Heat, and Power (CHHP)‐based MG (CHHP‐MG) is presented. The impacts of employing demand and resource management approaches are analysed in terms of benefits and pollution aspects of the operational problem. To conduct a comprehensive study, management approaches are employed for two different constructions of CHHP. To solve the demand‐side management problem, a combination of the Sunflower Optimisation Algorithm and an Analytic Hierarchy Process (AHP) is used. The numerical results indicate that the proposed demand‐side management method performs well in improving the economic and environmental indices of the MG. Specifically, the simulation of the proposed model demonstrates a 3% reduction in total pollution on the demand side, a 42% reduction on the energy resource management side, and a 44% reduction on both the demand and energy resource management sides. Meanwhile, economic profit increased by 34.19% on the demand side, 49.2% on the energy resource management side, and 70% when both the demand and energy resource management sides were applied.