The current research was conducted with the aim of the effect of attachment style on emotion REGULATION with the mediating role of identity style. The research method was descriptive and structural equation analysis. The statistical population of the research was all second year high school students of Kashan city in the academic year of 1400-1401, of which 500 people were selected by random cluster method. Data were collected based on three questionnaires: Gross & Jan (2003) Emotional REGULATION Inventory, Identity Style Scale (6G-ISI) and Collins and Reid (1990) Attachment Style Questionnaire. The data are obtained by structural equation modeling and using Laserl 8.8 and 26 spss software. analyzed. Based on the results, secure attachment style at a significance level of 0.01, avoidant attachment style at a significance level of 0.05, and ambivalent attachment style at a significance level of 0.01 directly predicted emotion REGULATION. Among the three attachments, secure attachment style predicted emotion REGULATION at a significant level of 0.01, with the mediation of identity styles. Informational identity style at a significance level of 0.01, confused identity style at a significance level of 0.05 directly predicted emotion REGULATION. Among the three attachments, only the secure attachment style at a significance level of 0.01 had a significant role in predicting the normative identity style. According to the results of this study, emotion REGULATION is one of the most important constructs of educational psychology and an important factor in determining mental health and successful performance. It is in education that the factors affecting emotion REGULATION and its antecedents should be identified. Planning for training and holding educational workshops in this field in schools is suggested for students.

High power density of switched-capacitor converters (SCCs) is due to absent of inductive components. But, this subject leads to output VOLTAGE REGULATION problem and hard switching characteristics due to high current spikes, which increase switching losses and noise and limit the power rating. Although, performances of some SCCs have been improved recently by including some small inductors in their topologies, but, only few of them can regulate output VOLTAGE and have soft switching characteristics. Here, by combining an active clamp and a boost SCC, both output VOLTAGE REGULATION and soft switching characteristics are achieved, even when wide input VOLTAGE and load variations are applied. So, switching frequency can be increased to reduce inductors and capacitors values, due to low switching losses and noise. It reduces the converter volume and also improves its performance, because small inductors and capacitors have better high-frequency characteristics, practically. Therefore, the modified converter is practically much better than the conventional configuration, especially at high power ratings. Here, the modified converter has been analyzed, mathematically, and to verify the given analyses, it has been simulated and implemented at 200kHz for regulating a 400V output VOLTAGE, even when wide input VOLTAGE (50-100V) and load (400Ω-8kΩ ) variations are applied.

Increasing penetration level of modern generating units, in response to growing need for electrical energy and environmental issues, besides changing inherent of distribution systems and loads introduces new uncertainties into the power systems. In order to deal with such uncertainties, measurement-based control schemes are introduced in modern power systems. An attempt is made in this paper to propose a new measurement-based approach for tuning of excitation system parameters in large-scale power systems. For this purpose, Center of Gravity (COG) concept in corporation with fault propagation paradigm are introduced to reduce power system dimensions. In this framework, the power system dynamic behavior is represented by an equivalent model in which the geographical areas interact with the COG through unique fictitious interconnectors. Then, a new control scheme proposes in which utilizes post-fault system dynamics in the rotor angle-terminal VOLTAGE deviations portrait to design a coordinated Automatic VOLTAGE Regulator (AVR)-Power System Stabilizer (PSS). Basic power system equations are employed to derive a case-independent algorithm. Effectiveness of the proposed method is examined for different fault scenarios on the 16 machines IEEE benchmark system.

This paper proposes a proper hierarchical control strategy composed of a modified droop controller in primary level and a distributed finite-time average controller in secondary layer. The aim of this paper is to achieve precise active and reactive power sharing and frequency and VOLTAGE alignment in an islanded AC microgrid (MG). To do so, a typical AC MG is simulated in MATLAB/SIMULINK software, and the proposed method is modeled and implemented. In the simulated AC MG, the distributed generation (DG) units are photovoltaic (PV) systems. The obtained results illustrate that the proposed method appropriately shares active and reactive powers among presented DGs in various operational modes such as load change, increase or decrease in DGs’ output power as well as connection and disconnection of communication links. It also accurately  restores the frequency and VOLTAGEs of DGs to their nominal values.

The present paper investigated the effectiveness of concept mapping as a learning strategy on EFL students’ self-REGULATION (metacognitive self-REGULATION, time and study environment, effort REGULATION, peer learning, and help seeking). Sixty university students participated in the study. They were randomly assigned to control and experimental groups, each including thirty students. They were at the intermediate level of English proficiency and studying English either Translation or Literature. Their language proficiency was determined by the Michigan Test of English Language Proficiency (MTELP) (Corrigan, 1979). The instrument to collect data on the students’ selfREGULATION was the Motivated Strategies for Learning Questionnaire (MSLQ) (Printrich et al., 1991). The findings revealed that students gained higher self-REGULATION in writing tasks as the result of the explicit instruction of the concept mapping strategy. The findings have implications for pedagogy as well as for research.

This paper describes a new design for direct sliding mode method with a high switching frequency using the PD-PI type sliding surface applied to a negative output Luo converter worked in continuous current mode for applications required constant power source such as aerospace applications, medical equipment and etc. Because of the output power and line changes, the converter model is also nonlinear and time varying. In addition, losses dissipation and VOLTAGE drops caused a deviation between the theoretical and actual output VOLTAGE of this converter. For improvement of the converter performance along with the current and VOLTAGE REGULATIONs, a nonlinear controller is required. This suggested controller is proper to inherently variable structure of the converter and can cope with nonlinearities associated with its model. The goal is to ensure a satisfactory response for the converter. The practical results showed that the proposed strategy helps to eliminate the VOLTAGE error along with continuous current operation of the converter in very light loads and high switching frequency in different operating points.

Dynamic modeling and control of dc-dc series resonant converter (SRC) especially when operating in discontinuous conduction mode (DCM) is still a challenge in power electronics. Due to semiconductors switching, SRC is naturally represented as a switched linear system, a class of hybrid systems. Nevertheless, the hybrid nature of the SRC is commonly neglected and it is modeled as a purely continuous dynamics based on the sinusoidal approximation and averaging. However, an SRC may be purposely designed to operate in DCM so the sinusoidal approximation is no longer acceptable. Therefore, it is essential to analyze the stability using a more sophisticated model. This paper presents a novel hybrid control strategy for the output VOLTAGE REGULATION of the SRC operating in DCM. Neither sinusoidal nor averaging is used. The stability of the closed-loop system is systematically fulfilled by satisfying some linear matrix inequalities. The proposed hybrid control approach has simple hardware implementation which does not require fast sampling of the resonant tank waveforms and external VOLTAGE-controlled oscillator. A prototype of the SRC is constructed and the hybrid controller is realized on a TMS320F2812 DSP core. The effectiveness of the proposed method is verified by simulation and experimental results.