Comparison of Average Current Controlled PFC SEPIC and CUK Converter Feeding Current Controlled SRM

In this paper, current control of 6/4 switched reluctance motor (SRM) fed by both power factor correction (PFC) SEPIC and CUK converter is realised and asymmetric bridge converter is used to drive SRM. Furthermore, SEPIC and CUK DC-DC converters are connected in series to diode bridge rectifier in order to build PFC converters. Average current control of PFC converters is carried out by PI algorithm and both converters are operated at continuous conduction mode (CCM). Besides, switching frequency of PFC and asymmetric bridge converters is 62, 9 kHz with 5750 W power. Studies are conducted by using MATLAB/Simulink software. Total harmonic distortions (THD)s of grid current, grid power factor (PF) and output voltages of the converters are compared. Also, THDs of grid current of each converter are compared by IEEE 519-2014 standard. In addition, current waveform and flux of SRM phases are shown. It is validated by simulations that PFC CUK converter gives better result with 9.08% THD, 0.998 PF than PFC SEPIC converter having 9.61% THD and 0.997 PF. Furthermore, both converters provide the limit defined by standards

Current‐Controlled SRM Fed by Three‐Phase Boost PFC

In this chapter, firstly, converter types of switched reluctance motor (SRM) are described. Current control structure of SRM, which has six stator and four rotor poles, over an asymmetric bridge converter, is also explained. While feeding SRM by an AC grid, grid voltages have to be converted to DC voltage; to realize this conversion, in order to obtain high power factor and sinusoidal grid current, power factor correction (PFC) circuits must be used. In this study, an asymmetric bridge converter of SRM is fed by three‐phase PFC boost converter that consists of uncontrolled diode rectifier and DC‐DC boost converter with high frequency operation. PFC boost converter is controlled by nonlinear control algorithm. By means of the simulations that are conducted by MATLAB/Simulink, grid voltage and current, current harmonics of each phase, three‐phase currents of phases, flux, and current of SRM are presented. Simulation results show that proposed SRM that is fed by three‐phase PFC boost converter system gives the desired performance, for both grid and SRM side

Predominant characteristics of linq technology usage in education platforms

Cyprus International Conference on Educational Research (CY-ICER-2012) North Cyprus, US08-10 February, 2012LINQ is the abbreviation of "Language Integrated Query". LINQ technology mainly allows reaching data easily from application side and making queries over data as if they are made in database systems. In this study, we aimed to share our experience of usage of LINQ technology in an education platform named as GPM. This paper mainly focuses on specification of main advantages of using LINQ in an education application. It also brings differences between LINQ and Ado. Net to the fore and discusses why any future technology will be successful if it includes the main advantages of LINQ technology

Feedback Linearization Control of Interleaved Boost Converter Fed by PV Array

One of the powerful methods of nonlinear control is the feedback linearization technique. This technique consists of input state and input-output linearization methods. In this chapter, the feedback linearization technique, including input state and input-output linearization methods, is described. Then, input-output linearization method is used for output voltage control of interleaved boost converter. Firstly, mathematical model of the interleaved boost converter is derived after that the method is applied. Besides, the interleaved boost converter is fed by a PV array under irradiation level and ambient temperature change. As a result of the simulation study, output voltage control of interleaved boost converter under reference voltage change is realized as desired

Novel hybridized computational paradigms integrated with five stand-alone algorithms for clinical prediction of HCV status among patients: A data-driven technique

The emergence of health informatics opens new opportunities and doors for different disease diagnoses. The current work proposed the implementation of five different stand-alone techniques coupled with four different novel hybridized paradigms for the clinical prediction of hepatitis C status among patients, using both sociodemographic and clinical input variables. Both the visualized and quantitative performances of the stand-alone algorithms present the capability of the Gaussian process regression (GPR), Generalized neural network (GRNN), and Interactive linear regression (ILR) over the Support Vector Regression (SVR) and Adaptive neuro-fuzzy inference system (ANFIS) models. Hence, due to the lower performance of the stand-alone algorithms at a certain point, four different novel hybrid data intelligent algorithms were proposed, including: interactive linear regression-Gaussian process regression (ILR-GPR), interactive linear regression-generalized neural network (ILR-GRNN), interactive linear regression-Support Vector Regression (ILR-SVR), and interactive linear regression-adaptive neuro-fuzzy inference system (ILR-ANFIS), to boost the prediction accuracy of the stand-alone techniques in the clinical prediction of hepatitis C among patients. Based on the quantitative prediction skills presented by the novel hybridized paradigms, the proposed techniques were able to enhance the performance efficiency of the single paradigms up to 44% and 45% in the calibration and validation phases, respectively.Operational Research Centre in Healthcare, Near East University, North Cyprus, Mersin-10, Turkiy

Casirivimab/İmdevimab: Evcil Hayvanlarda COVID-19 Tedavisi İçin Olası Bir Aday: Geleneksel Derleme

The coronavirus disease-2019 (COVID-19), over the last 3 years has globally resulted in catastrophic widespread losses. Prevention and control of this disease has become a global priority for researchers and medical professionals due to high mortality rates, treatment costs and various losses (economic and fatalities). In recent times, the fact that cats and dogs living in households which are being affected by the disease has caused panic among pet owners and animal lovers. Studies have shown that cats, especially young cats, are the group of animals which are most affected. Therefore, the treatment of COVID-19 in animals is an important topic for veterinary medicine. Monoclonal antibodies have also been considered a possible treatment modality due to the use of various agents to treat COVID-19 and the lack of clear demonstration of their efficacy. Casirivimab/imdevimab (CAS/IMD) is a monoclonal antibody cocktail approved for treating COVID-19. There was a high expectation that CAS/IMD combination directly affects the angiotensin converting enzyme-2 receptors, which plays an important role in the pathogenesis of the virus. Experimental and clinical studies have shown that CAS/IMD combination positively affects the prognosis of patients suffering from COVID-19, speeds up the recovery process and increases survival. We suggest that CAS/IMD can be considered protective in COVID-19 positive dogs and cats. The aim of this article is to review the studies related to the beneficial effects of CAS/IMD and its possible effectiveness in animals with COVID-19 to promote their research in future studies.Koronavirüs hastalığı-2019 [coronavirus disease-2019 (COVID- 19)], son 3 yılda küresel olarak trajik yaygın kayıplara neden oldu. Bu hastalığın önlenmesi ve kontrolü; yüksek ölüm oranları, tedavi maliyetleri ve diğer çeşitli kayıplar (ekonomik ve ölümler) nedeniyle araştırmacılar ve medikal uzmanları için küresel bir öncelik hâline gelmiştir. Son zamanlarda hastalıktan etkilenen hanelerde yaşayan kedi ve köpeklerin olması, evcil hayvan sahipleri ve hayvanseverler arasında da paniğe neden oldu. Araştırmalar, kedilerin, özellikle genç kedilerin, en çok etkilenen hayvan grubu olduğunu göstermiştir. Bu nedenle hayvanlarda COVID-19 tedavisi veteriner hekimliği için önemli bir konudur. Monoklonal antikorlar, COVID-19’u tedavi etmek için çeşitli ajanların kullanılması ve etkinliklerinin net bir şekilde gösterilmemesi nedeniyle olası bir tedavi yöntemi olarak kabul edilmiştir. Casirivimab/imdevimab (CAS/IMD), COVID-19 tedavisi için onaylanmış bir monoklonal antikor kokteylidir. CAS/IMD kombinasyonunun, virüsün patogenezinde önemli bir rol oynayan anjiyotensin dönüştürücü enzim-2 reseptörlerini doğrudan etkilediği yönünde yüksek bir beklenti vardı. Deneysel ve klinik çalışmalar, CAS/IMD kombinasyonunun, COVID-19’dan muzdarip hastaların prognozunu olumlu yönde etkilediğini, iyileşme sürecini hızlandırdığını ve sağkalım oranını artırdığını göstermiştir. Dolayısıyla CAS/IMD’nin COVID-19 pozitif köpek ve kedilerde koruyucu olarak kabul edilebileceğini öneriyoruz. Bu derlemenin amacı, CAS/IMD’nin faydalı etkileri ile ilgili çalışmaları ve gelecekteki araştırmaları teşvik etmek için COVID-19’lu hayvanlarda CAS/IMD’nin olası etkinliğinin gözden geçirilmesidir