http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hamid Radmanesh,S.H.Fathi,G.B. Gharehpetian 대한전기학회 2016 Journal of Electrical Engineering & Technology Vol.11 No.5
Recently, various types of Solid State Fault Current Limiters (SSFCLs) have been proposed. These SSFCLs can improve the voltage quality, decrease the transmission losses, and also can enhance the distribution network stability but there are some practical problems with these FCLs. This paper proposes a modified FCL with focusing on the components optimization, efficiency improvement and reducing the cost. The suggested FCL uses a series AC reactor with controllable power electronic switches named Thyristor-Controlled AC Reactor (TCAR) which is connected in series with the feeder to limit the fault current and avoid fault current problems, which impairs overall distribution network reliability. The influence of TCAR on the fault current is analyzed using analytical, simulation and laboratory tests. The performance of the proposed TCAR in the simple distribution network is examined. The simulation and experimental results are in a good agreement with together and show the proper operation of the proposed TCAR during the normal and fault operation modes.
Increasing Flight Endurance of MAVs using Multiple Quantum Well Solar Cells
Hassanalian, Mostafa,Radmanesh, Mohammadreza,Sedaghat, Ahmad The Korean Society for Aeronautical and Space Scie 2014 International Journal of Aeronautical and Space Sc Vol.15 No.2
Micro Aerial Vehicles (MAVs) are useful devices to assess new features that may be utilized in a full size aircraft to enhance performance or to increase endurance. In this article, sources for energy saving in the micro air vehicles are initially addressed. Then, by specifying the important parameters on energy consumption of an aircraft, a feasibility study is conducted to assess the benefit of using solar cells to increase flight endurance. Next, a new solar cell has been designed and optimized for MAVs. This cell consists of a multiple quantum wells for which the quantum factor and the absorption coefficient are calculated by solving the Shrodinger equation using MATLAB software. Then, the manner and influence of MAVs parameters using the solar cells are examined to suggest optimal planform for different purposes. In order to increase flight endurance, it is noted that by using appropriate planform and the optimized solar cells, flight endurance can be increased by more than 30 percent.
Soleimannejad Maryam,Mirzazadeh Mahyar,Radmanesh Nima 대한수면학회 2022 sleep medicine research Vol.13 No.3
Background and Objective The role of night sleep in learning and consolidating memory has been mentioned and researched in many studies. Different tools have been used to determine the effect of sleep. However, this kind of research in the Iranian population is limited. Thus, the objective of this study was to determine the role of sleep in immediate and late learning of new words of second language in a number of English language learners.Methods Forty Persian males aged 18–35 years old participated in our study in two groups. The first group completed learning steps at 8–10 AM and repeated the test after 12 hours. The second group performed the initial stages of learning at 8–10 PM and repeated the test next morning. Everyone completed the Pittsburgh Sleep Quality Index Persian version for evaluating their sleep habits during last month and the effect of their sleep habits on achieved task scores.Results Comparison of the number of recalled words (NRW) between the two groups showed a significant difference (p-value < 0.001) with better performance in night group. The NRW during the second stage was positively influenced by better subjective sleep quality, lower sleep latency, higher sleep efficiency, and more sleep duration significantly (p-value < 0.05). There was no significant relationship of NRW with sleep disorders, sleep medications, or daytime dysfunction.Conclusions Adequate night sleep could improve late learning of second language in our research subjects. Sleep quality, latency in falling asleep, and subjective sleep quality might play a role in this learning process.
Increasing Flight Endurance of MAVs using Multiple Quantum Well Solar Cells
Mostafa Hassanalian,Mohammadreza Radmanesh,Ahmad Sedaghat 한국항공우주학회 2014 International Journal of Aeronautical and Space Sc Vol.15 No.2
Micro Aerial Vehicles (MAVs) are useful devices to assess new features that may be utilized in a full size aircraft to enhance performance or to increase endurance. In this article, sources for energy saving in the micro air vehicles are initially addressed. Then, by specifying the important parameters on energy consumption of an aircraft, a feasibility study is conducted to assess the benefit of using solar cells to increase flight endurance. Next, a new solar cell has been designed and optimized for MAVs. This cell consists of a multiple quantum wells for which the quantum factor and the absorption coefficient are calculated by solving the Shrodinger equation using MATLAB software. Then, the manner and influence of MAVs parameters using the solar cells are examined to suggest optimal planform for different purposes. In order to increase flight endurance, it is noted that by using appropriate planform and the optimized solar cells, flight endurance can be increased by more than 30 percent.
Frequency Response Model of Power System in Presence of Thermal, Wind and Hydroelectric Units
Darani Shirin Hassanzadeh,Rabbanifar Payam,Aliabadi Mahmood Hosseini,Radmanesh Hamid 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.4
Loss of large generation units or unforeseen changes in consumption load causes disturbances in power system operation. Operators face serious challenges by increasing the penetration level of renewable energies in unit commitment and inability of these resources in providing inertial frequency response. Therefore, having system frequency response model makes operators to have a better understanding of system function and frequency behavior encounter disturbances and critical situations. This paper, studies the importance and necessity of recognizing the frequency response model and presents an integrated model of system frequency response in the presence of thermal, wind and hydroelectric units. Using the Routh stability criterion method, the proposed fifth-order model converts to a second-order model with an acceptable approximation. Proposed system frequency response in a six-bus power system is investigated and effect of changes in the main components on the frequency behavior of system is checked out. Researchers can linearize the obtained frequency response model using conventional linearization methods and use it as a frequency constraint in optimization and security-constrained unit commitment problems. Besides that, frequency behavior of the power system consisting of thermal units after addition of wind and hydroelectric units is studied. This paper helps researchers to have simplified calculation, beneficial and accurate results, while saving time, money and fossil reserves.
Specification of Bacteriophage Isolated Against Clinical Methicillin-Resistant Staphylococcus Aureus
Ahmad Nasser,Reza Azizian,Mohsen Tabasi,Jamil Kheirvari Khezerloo,Fatemah Sadeghpour Heravi,Morovat Taheri Kalani,Norkhoda Sadeghifard,Razieh Amini,Iraj Pakzad,Amin Radmanesh,Farid Azizi Jalilian 질병관리본부 2019 Osong Public Health and Research Persptectives Vol.10 No.1
Objectives: The emergence of resistant bacteria is being increasingly reported around the world, potentially threatening millions of lives. Amongst resistant bacteria, methicillin-resistant Staphylococcus aureus (MRSA) is the most challenging to treat. This is due to emergent MRSA strains and less effective traditional antibiotic therapies to Staphylococcal infections. The use of bacteriophages (phages) against MRSA is a new, potential alternate therapy. In this study, morphology, genetic and protein structure of lytic phages against MRSA have been analysed. Methods: Isolation of livestock and sewage bacteriophages were performed using 0.4 μm membrane filters. Plaque assays were used to determine phage quantification by double layer agar method. Pure plaques were then amplified for further characterization. Sulfate-polyacrylamide gel electrophoresis and random amplification of polymorphic DNA were run for protein evaluation, and genotyping respectively. Transmission electron microscope was also used to detect the structure and taxonomic classification of phage visually. Results: Head and tail morphology of bacteriophages against MRSA were identified by transmission electron microscopy and assigned to the Siphoviridae family and the Caudovirales order. Conclusion: Bacteriophages are the most abundant microorganism on Earth and coexist with the bacterial population. They can destroy bacterial cells successfully and effectively. They cannot enter mammalian cells which saves the eukaryotic cells from lytic phage activity. In conclusion, phage therapy may have many potential applications in microbiology and human medicine with no side effect on eukaryotic cells.