نتایج جستجو برای: نورجستومت pmsg

تعداد نتایج: 1311  

Journal: :Energy Reports 2021

In order to analysis the small signal stability of direct-drive permanent magnetic synchronous generator (PMSG) based wind farm, this paper makes a model windfarm including detailed PMSG adopting component connection method (CCM). process, system, consist turbine units with PMSG, collection cable, feeder, transmission cable and grid side, is divided into several subsystems. The interconnection ...

Journal: :Energies 2021

To research the chaotic motion problem of direct-drive permanent magnet synchronous generator (D-PMSG) for a wind turbine with uncertain parameters and fractional order characteristics, control strategy established upon fuzzy state feedback is proposed. Firstly, according to working mechanism D-PMSG, Lorenz nonlinear mathematical model by affine transformation time transformation. Secondly, sys...

2018
Karim Belmokhtar Hussein Ibrahim Mamadou Lamine Doumbia

This chapter deals with a comprehensive overview study of the direct‐driven (DD) permanent magnet synchronous generator (PMSG) for wind‐energy generation system for stand‐alone applications. The dynamic model of PMSG is presented, and different maximum power point tracking (MPPT) algorithms have been realized in the aim to compare their performance. A comparison of performances of the conventio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید چمران اهواز - دانشکده دامپزشکی 1393

یکی از اهداف شیشه ای سازی تخمدان، حفظ عملکرد بافت تخمدان و افزایش باروری است. هدف این مطالعه تکامل آزمایشگاهی فولیکول های تخمدان شیشه ای شده موش صحرایی بود. در این مطالعه از ده سر موش های صحرایی استفاده شد. تخمدان ها با روش انجماد شیشه ای با استفاده از اتیلن گلیکول و گلیسرول و ساکارز منجمد و با استفاده غلظت های نزولی ساکارز ذوب شدند. محیط کشت تخمدان ها tcm حاوی 4/0% bsa، iu/ml 5 hcg و µg/ml40 ج...

2003
O. B. OZDAS

The aim of our study was to investigate the efficacy of exogenous gonadotrophin to induce puberty and pregnancy in prepubertal gilts which had reach the weight of fully grown pigs. The animals used in the study included 195 crossbreed German Landrace gilts aged between 150-180 days old, weighing between 75-90 kg and 24 crossbreed German Landrace adult male pigs. The prepubertal gilts of Group I...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2004
Vinod Srivastava Robert K Dearth Jill K Hiney Lisa M Ramirez Gerald R Bratton W Les Dees

Estradiol (E2) is suppressed in prepubertal females exposed maternally to lead (Pb); thus, we assessed effects of Pb on ovarian steroidogenic acute regulatory protein (StAR) as a potential mechanism for this action. Adult Fisher 344 females were dosed with 12 mg of lead acetate per ml of Pb acetate (PbAc) or sodium acetate (NaAc; control), beginning 30 days prior to breeding and continuing unti...

2016
Katheryn L. Cerny Rosanne A. C. Ribeiro Myoungkun Jeoung CheMyong Ko Phillip J. Bridges Eric Asselin

Estrogen receptor-α (ESR1) is an important transcriptional regulator in the mammalian oviduct, however ESR1-dependent regulation of the transcriptome of this organ is not well defined, especially at the genomic level. The objective of this study was therefore to investigate estradiol- and ESR1-dependent regulation of the transcriptome of the oviduct using transgenic mice, both with (ESR1KO) and...

Journal: :American journal of physiology. Endocrinology and metabolism 2005
Miyun Tsai-Turton Ulrike Luderer

We have observed that levels of the antioxidant glutathione (GSH) and protein levels of the catalytic and modifier subunits of the rate-limiting enzyme in GSH synthesis, GCLc and GCLm, increase in immature rat ovaries after treatment with gonadotropin. The goals of the present studies were to delineate the time course and intraovarian localization of changes in GSH and GCL after pregnant mare's...

2011
Yu-Il Lee Woo-Dae Kang Mi-Young Kim Moon-Kyoung Cho Sang-Young Chun

OBJECTIVE Peroxiredoxins (Prxs) play an important role in regulating cellular differentiation and proliferation in several types of mammalian cells. This report examined the expression of Prx isotype I in the rat ovary after hormone treatment. METHODS Immature rats were injected with 10 IU of pregnant mare's serum gonadotropin (PMSG) to induce the growth of multiple preovulatory follicles and...

Journal: :Energies 2022

Wind turbine generators (WTGs) are highly sensitive to the disturbances of grid and tend disconnect quickly during a voltage dip (when value is less than 80% nominal voltage) or when frequency greatly changed. As an increasing number permanent magnet synchronous (PMSGs) incorporated into modern power grid, system operators expect PMSG-WT play active role in low-voltage ride-through (LVRT) prima...

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