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Open Access Article
1 - Effects of Landau damping on finite amplitude low-frequency nonlinear waves in a dusty plasma
Arnab Sikdar Manoranjan Khan -
Open Access Article
2 - A Multi-supplier Inventory Model with Permissible Delay in Payment and Discount
M. Farhangi E. Mehdizadeh -
Open Access Article
3 - Virtual Inertia Control of Microgrid Consisting of Low Inertia Resources
Sahar Roudi Reza Ebrahimi Mahmood Ghanbari Soheil RanjbarIn this paper, an adaptive concept of virtual generator based controller for dynamic stability of microgrids consisting of low inertia resources. For this purpose, considering a set of energy storage systems dispatched in the network, a controlled islanding scheme MoreIn this paper, an adaptive concept of virtual generator based controller for dynamic stability of microgrids consisting of low inertia resources. For this purpose, considering a set of energy storage systems dispatched in the network, a controlled islanding scheme is provided to dynamically control the microgrid frequency. In this context, based on the concept of center of inertia, the proposed virtual generator scheme is developed through mathematical formulation. Also, from the Inter-area torques evaluated by microgrid control areas in the center of inertia frame are used as input signals of the developed virtual generator based controller. For the energy storage systems, an equivalent dispatch model is provided and developed through the microgrid dynamic model for improving frequency stability during inter-area oscillations. The proposed virtual generator-based controller is an online and non-model-based scheme which controls several microgrid systems together as an integrated network connected to the upstream network. In order to evaluate the ability of the proposed scheme, realtime simulations are carried out on one test system consisting of several microgrids. Numerical results demonstrate the effectiveness of the proposed scheme in increasing system inertia constant resulting in a proper dynamic performance with a high damping ratio in facing severe inter-area oscillation. Manuscript profile -
Open Access Article
4 - Effect of Adding a Styrene-Butadiene Rubber Damper to A Sled Sample and Extraction of Its Equivalent Stiffness and Damping
Mohammad Reza Najafi Saied Mahjoub Moghadas -
Open Access Article
5 - Numerical and Experimental Investigation of Natural Frequency and Damping Coefficient of Flexible Cellular Lattice Structures
Amir Hosein Samimi M. R. Karamooz-Ravari Reza DehghaniCellular lattice structures encompass a class of metamaterials characterized by the arrangement of interconnected struts and/or plates, offering an adaptable microstructure that enables a broad range of property control. These structures have garnered significant attent MoreCellular lattice structures encompass a class of metamaterials characterized by the arrangement of interconnected struts and/or plates, offering an adaptable microstructure that enables a broad range of property control. These structures have garnered significant attention for their distinctive properties and have found widespread application across industries such as aerospace, medical, pharmaceutical, automotive, defense and safety. This study seeks to explore the impact of geometric parameters on the natural frequency and damping coefficient of cellular lattice structures. Samples featuring BCC and OCTET architectures with varying porosities were initially produced using fused deposition modeling (FDM). Subsequently, both experimental and numerical analyses were conducted to assess the first natural frequency and damping coefficient of these materials. Comparison of the numerically obtained results with experimental data revealed a strong agreement. The findings indicate that, for both BCC and OCTET lattices, an increase in porosity is associated with a decrease in both natural frequency and damping coefficient. Manuscript profile -
Open Access Article
6 - Vibration Analysis of Size-Dependent Piezoelectric Nanobeam Under Magneto-Electrical Field
M Ghadiri M Karimi Asl M Noroozi -
Open Access Article
7 - Thermoelastic Damping and Frequency Shift in Kirchhoff Plate Resonators Based on Modified Couple Stress Theory With Dual-Phase-Lag Model
S Devi R Kumar -
Open Access Article
8 - Size-Dependent Analysis of Orthotropic Mindlin Nanoplate on Orthotropic Visco-Pasternak Substrate with Consideration of Structural Damping
A Ghorbanpour Arani M.H Jalaei S Niknejad A.A Ghorbanpour Arani -
Open Access Article
9 - Study Of Thermoelastic Damping in an Electrostatically Deflected Circular Micro-Plate Using Hyperbolic Heat Conduction Model
G Rezazadeh S Tayefeh-rezaei A Saeedi Vahdat V Nasirzadeh -
Open Access Article
10 - Thermo-elastic Damping in a Capacitive Micro-beam Resonator Considering Hyperbolic Heat Conduction Model and Modified Couple Stress Theory
M Najafi G Rezazadeh R Shabani -
Open Access Article
11 - Damping and Frequency Shift in Microscale Modified Couple Stress Thermoelastic Plate Resonators
S Devi R Kumar -
Open Access Article
12 - A review of cucumber damping-off disease management in Iran
Laleh NaraghiDamping-off is actually a general term for several diseases with similar symptoms that attack new plant seedlings and are caused by several pathogenic soil fungi, including Pythium, Phytophthora, Fusarium, and Rhizoctonia. In Iran, the damping-off disease of summer crop MoreDamping-off is actually a general term for several diseases with similar symptoms that attack new plant seedlings and are caused by several pathogenic soil fungi, including Pythium, Phytophthora, Fusarium, and Rhizoctonia. In Iran, the damping-off disease of summer crops is known by the local names of dry green, scorching, and water-affected, and is a major disease of cucumbers, melons, watermelons, and pumpkins. This disease has been prevalent in all cultivation areas of these plants, including Khuzestan, Isfahan, Fars, Kerman, Jiroft, Tehran, Varamin, Saveh, Kashan, Lorestan, Qazvin, Hamadan, Khorasan, Bandar Abbas, Azerbaijan, and Mazandaran. Agricultural, chemical, and biological control methods are applied in the management of cucumber damping off. In general, a review of the research showed that the use of chemical and biological pesticides is a very suitable solution to control plant rot, because if it is not controlled in time, it can destroy the entire crop and cause irreparable damage to the greenhouse or farm owner. Manuscript profile -
Open Access Article
13 - Study of the possibility of biological control of Phytophthora drechsleri damping factor in cucumbers by the isolates of Trichoderma spp. in greenhouse
Ehsan Khani Mojdeh Maleki Dariush ShahriariCucumber (Cucumis sativus) is one of the important commercial products in Iran and the world rich in fiber and vitamin with high nutritional value. It is continuously attacked by soil-borne pathogens that are not only cause significant economic damage to crop yield, but MoreCucumber (Cucumis sativus) is one of the important commercial products in Iran and the world rich in fiber and vitamin with high nutritional value. It is continuously attacked by soil-borne pathogens that are not only cause significant economic damage to crop yield, but also reduce quality and marketable of product. One of the most important and destructive soil-borne diseases of cucumber, damping off and root rot and crown caused by Phytophthora drechsleri Tuker. In this study, isolates of three species of biocontrol fungus Trichoderma were evaluated in laboratory and greenhouse conditions. The antagonistic isolates of three species were including Trichoderma harzianum (isolates Th3, Th5, Th6, Th7, Th9), T. longibrachiatum (isolate Tl2) and T. atroviride (isolates Ta1 ,Ta4, Ta8, Ta10) respectively. Dual culture tests were carried out in a completely randomized design with 11 treatments in three replications. Th6 Isolate, with 89.3% in dual culture showed the highest inhibitory effect on the. Hyphae twisting of different isolates of Trichoderma spp. were not observed in contact with Phytophthora but Trichoderma hyphae grown in parallel with Phytophthora hyphae and form Appresorium and Haustarium. Based on the results of this research, the most successful isolates for antagonist activity against P. drechsleri Tuker were Th6, Th5, Th3 and Ta1. These four isolates were selected for greenhouse studies. In greenhouse, tests of soil treatment and seed contaminated with the spore suspension of Trichoderma isolates for evaluating the biocontrol isolates in a completely randomized design with 10 treatments and three replications were conducted. Results showed that the isolates were able to control the disease in different levels. In seed treatment, Th6 and Ta1 isolates with 91.75 and 83.5 percent and afterwards, Th3 and Th5 isolates were more effective in reducing disease in first taking notes after soil treatment respectively. In seed treatment, Th6 and Ta1 isolates were more successful than other isolates and in inoculated treatments with the isolates and Phytophthora, seed germination percentage were recorded as 83.34 and 100 % respectively. In general, the seed treatment was more effective in reducing disease in comparison with soil treatment. Isolates were also effective in increasing plant growth and however, Ta1 and Th6 isolates significantly increased plant weight and height. Manuscript profile -
Open Access Article
14 - Efficacy of the stabilizers of Talaromyces flavus in biological control of sugar beet seedling damping-off disease
Sheedeh Mehraban Booshehri Laleh Naraghi Mohammad TorabiIn the present study, first the superior bioformulations for Talaromyces flavus,containging some chemical stabilizers were determined by measuring the presentage of active spores in bioformulations and then their efficacy in biological control of sugar beet seedli MoreIn the present study, first the superior bioformulations for Talaromyces flavus,containging some chemical stabilizers were determined by measuring the presentage of active spores in bioformulations and then their efficacy in biological control of sugar beet seedling damping-off was investigated in greenhouse. An experiment was performed in split plot based on randomized complete block design with four replications in greenhouse. Three inoculum application methods (soil treatment, seed treatment and combination of both methods) were considered as the main factor and eight different inoculum formulations including six superior bioformulations Dicycloserin-TF-Su-K-1,Dicycloserin-TF-Su-K-2,Dicycloserin-TF-Su-K-3, Carboxymethilcellolose-TF-Su-K-2, Sulfate magnesium-TF-Su-K-3 and Nitratesodium-TF-Su-K-2. together with two control treatments (healthy and infected checks) were considered as the sub-factor.The results indicated that the most effective treatments for biological control of sugar beet damping-off were Dicycloserin stabilizer and isolate TF-Su-K-3, separetely. Results of the interaction effects of inoculum application method and inoculum showed that the treatment of Dicycloserin-TF-Su-K-2 applied as soil treatment or as combination of soil and seed treatment resulted in less disease occurrance. Manuscript profile -
Open Access Article
15 - Design dynamic absorber to reduce vibrations of wing of a flyer object: Experimental & numerical investigation
آرش نعیمی آبکناری محمدرضا صالحی برزگر mohammad mahdi KheirikhahThe wings of projectile is one of the important components for correct controlling and navigation. In this study, in order to consider the vibration behavior of the wing, the governing equations of the opening process of the wing system until collision was derived using MoreThe wings of projectile is one of the important components for correct controlling and navigation. In this study, in order to consider the vibration behavior of the wing, the governing equations of the opening process of the wing system until collision was derived using analytical method. Also, numerical method using ADAMS software and experimental set up are adopted to compare and verify the analytical analysis. This collision lead to an unwanted excitation of the wing which cause to it vibrates. For decreasing the amplitude of vibration of the wing in better manner, in this research a dynamic absorber is designed and made of Teflon as a damper. The dynamic behavior of the wing with the absorber is studied using analytical and numerical methods and the effect of many parameters such as friction coefficient, material properties of the wing pin and contact area is investigated to optimize its behavior. Obtained results demonstrate that increase in the friction coefficient decrease the returning angle and oscillation amplitude of the wing. Manuscript profile -
Open Access Article
16 - Using Neural Network to Control STATCOM
Mozhgan Balavar -
Open Access Article
17 - Developing and Solving two Level Lot Sizing Problem with Multi Production Methods using Vibration Damping Optimization Algorithm
Mohammad Ebrahimi Maghsod AmiriThe Capacitated Lot Sizing Problem (CLSP) consists of determining the production quantity and timing for several items on a single facility over a finite number of periods so that the demand and capacity constraints can be satisfied at a minimum cost. In this Article, d MoreThe Capacitated Lot Sizing Problem (CLSP) consists of determining the production quantity and timing for several items on a single facility over a finite number of periods so that the demand and capacity constraints can be satisfied at a minimum cost. In this Article, developing two level lot sizing problem with multi production methods is provided. The objective of the proposed model is to minimize costs. Vibration Damping Optimization (VDO) is used to solve a model. Taguchi method has been utilized to calibrate the parameters of algorithms Since the quality of solving all of the meta-innovative algorithms depends on their parameters.Then, to demonstrate the proper function of the solution method is provided, at first, experimental issues with different dimensions were generated, then it was solved by Lingo software and Vibration Damping Optimization. Finally, we compare the Lingo response and the optimization algorithm to reduce the vibration damping Optimization algorithm together in terms of the solution time. The results show that the answer to the vibration damping Optimization algorithm has a better quality than Lingo in issues of large size. Manuscript profile -
Open Access Article
18 - Three Metaheuristic Algorithms for Solving the Multi-item Capacitated Lot-sizing Problem with Product Returns and Remanufacturing
Esmaeil Mehdizadeh Amir Fatehi Kivi -
Open Access Article
19 - A New Hybrid Algorithm to Optimize Stochastic-fuzzy Capacitated Multi-Facility Location-allocation Problem
Esmaeil Mehdizadeh Mohammad Reza Tavarroth Vahid Hajipour -
Open Access Article
20 - Equivalent Viscous Damping in Steel Structures Equipped with Dampers.
Seyed Behdad Alehojjat Omid Bahar Masood Yakhchalian -
Open Access Article
21 - Performance Evaluation of Viscoelastic and Friction Passive Damping System in Steel Structures
Mohammad Taghi Kazemia Hosein Hoseini -
Open Access Article
22 - Transient Performance Improvement of Wind Turbines with Doubly Fed Induction Generators Using Active Damping Control Strategy
Saeed Soleymani Bahador Fani Mohammad Reza YousefiThis paper Analytically investigates the effects of system and controller parameters and operating conditions on the dynamic and transient behavior of wind turbines (WTs) with doubly-fed induction generators (DFIGs) under voltage dips and wind speed fluctuations. Also, MoreThis paper Analytically investigates the effects of system and controller parameters and operating conditions on the dynamic and transient behavior of wind turbines (WTs) with doubly-fed induction generators (DFIGs) under voltage dips and wind speed fluctuations. Also, it deals with the design considerations regarding rotor and speed controllers. The poorly damped electrical and mechanical modes of the system are identified, and the effects of system parameters, and speed/rotor controllers on these modes are investigated by modal and sensitivity analyses. The results of theoretical studies are verified by time domain simulations. It is found that the dynamic behavior of the DFIG-based WT under voltage dips is strongly affected by the stator dynamics. Further, it is shown that the closed loop bandwidth of the rotor current control, rotor current damping, DFIG power factor and the rotor back-emf voltages have high impact on the stator modes and consequently on the DFIG dynamic behavior. Moreover, it is shown that the dynamic behavior of DFIG-based WT under wind speed fluctuation is significantly dependent on the bandwidth and damping of speed control loop. Manuscript profile -
Open Access Article
23 - Investigating the effects of using a rocking motion system on the bending seismic Behavior of special steel frames
Ali Parvari S.Behnam BeheshtiToday, the need to design and implement structures with less vulnerability and damage, and easier repair after an earthquake is essential. Traditional seismically resistant lateral systems can cause serious damage to the structural system and the relative displacements MoreToday, the need to design and implement structures with less vulnerability and damage, and easier repair after an earthquake is essential. Traditional seismically resistant lateral systems can cause serious damage to the structural system and the relative displacements remaining in the structure make it very difficult and uneconomical to repair the structure after an earthquake. The utilize of rocking motion in the structure causes the destruction of destructive seismic effects including energy dissipation and improves the seismic behaviour. In this research, in order to investigate the effects of the rocking motion system on the seismic response of short and tall regular steel buildings, a five- and ten-story steel frames with special moment frame lateral bearing system according to the fourth edition of Standard 2800 and the latest editions of the sixth and tenth national building regulations are designed by Perform3D software. Seven earthquake records were selected and then these records were based on ASCE regulations scaled according to the spectrum of the 2800. By using nonlinear time history analysis, the seismic response of the studied building has been investigated in conditions with and without using a rocking motion system. The results of studies such as base shear, Relative displacement of floors, energy dissipation and lateral and vertical accelerations of the roof indicate that the use of rocking motion system in short and tall steel buildings can significantly improve the seismic response of the structure. Manuscript profile -
Open Access Article
24 - Performance Evaluation of Viscoelastic and Friction Passive Damping Systems in Vibration Control of Tall Buildings
Ehsan Noroozinejad Farsangi -
Open Access Article
25 - A TCSC Control Based on Stabilizing Delay Effect for Inter-Area Oscillation Damping in a Power System with Time Delay
Yasaman Yardani Sefidi Rasoul Asghari Babak Mozafari Mohammad Salay Naderi -
Open Access Article
26 - An Improved Power Conditioning System Based on Capacitor Current Feedback Active Damping of an LCL-Type Grid-Tied NPC Inverter
Majid Hosseinpour Mohammad Mohsen Rahimian Navid Rasekh -
Open Access Article
27 - LDO Optimization with Evolutionary Neural Network
Mahdieh Jahangiri Ali Farrokhi Amir Amirabadi -
Open Access Article
28 - Novel Adaptive Recurrent Neural Controller based on VSC HVDC Damping Controller to Improve Power System Stability
Naser Taheri -
Open Access Article
29 - Novel Adaptive Damping Controller for Interline Power Flow Controller to Improve Power System Stability
Naser Taheri Hamed Orojlo Hamid Karimi Farhad Ebrahimi Kaveh Khalifeh -
Open Access Article
30 - The dynamic response of aircraft landing gear at the moment of landing with regard to smart fluid dampers content MR
Nima Tabari Saeed Mahdiyeh Borojeni -
Open Access Article
31 - INVESTIGATING THE SEISMIC PERFORMANCE OF THE HONEYCOMB YIELDING DAMPER(HYD)
peyman shadman heidari Mohammad Ghanooni Bagha Zeinolabedi MortezaaliToday, the use of energy-dissipating system such as yielding metal damper in structures can improve the seismic performance of structures. One of the characteristics of metal yielding dampers is the ability to dissipate high energy and increase the ductility of the stru MoreToday, the use of energy-dissipating system such as yielding metal damper in structures can improve the seismic performance of structures. One of the characteristics of metal yielding dampers is the ability to dissipate high energy and increase the ductility of the structural system, which can improve the ductility and energy absorption characteristics of the metal frame equipped with braces and prevent the brace from buckling during an earthquake. The purpose of this research is introduce a new form of yielding dampers called honeycomb yielding damper (HYD) with different dimensions and thickness along with evaluating and comparing the force-displacement diagrams and investigating the seismic parameters of this type of yielding damper. All modeling and validation of numerical samples were done by Ansys software. Non-linear analysis method is used in this research. The hysteresis curves are obtained under in-plane cyclic loads. The mechanical parameters such as ductility ratio, initial hardness, effective hardness and damping coefficient can be determin. The results of this research showed that the effective stiffness increases by increasing the length and thickness of the sample. The ductility ratio decreases by increasing the height of the sample. the effective stiffness decreases by increasing the height of the sample. The ductility ratio increases by increasing the height of the sample. Also, the effective damping coefficient decreases with the increase in the height of the samples, the effective damping coefficient increases with the increase in length and thickness of the samples. Manuscript profile