Results 41 to 50 of about 712 (184)

Characterization of the variability and repeatability of gonadotropin-releasing hormone–induced luteinizing hormone responses in dairy cows within a synchronized ovulation protocol [PDF]

, 2017
he primary objective was to determine the variability and repeatability of GnRH-induced LH responses. The secondary objective was to evaluate the associations among plasma LH, FSH, estradiol (E2), and progesterone (P4) concentrations.
S.T. Butler, Colazo, M.G., Dutra, P.A., Bruinjé, T.C., P.A. Dutra, D.J. Ambrose, M.G. Colazo, M. Gobikrushanth, Gobikrushanth, M., T.C. Bruinjé, Ambrose, D.J.   +10 more
core   +2 more sources

A Novel Pre-Synchronization Control for Grid Connection of Virtual Synchronous Generator

Elektronika ir Elektrotechnika, 2020
The virtual synchronous generator (VSG) introduces rotational inertia and damping through the droop control to take part in frequency regulation of the grid.
Xuhai Chen, Yiwang Zhang, Jiqing Dong, Xingkui Mao, Jiaqiao Chen, Buyin Wen, Zhe Zhang   +6 more
doaj   +1 more source

A Pre-Synchronization Method for Parallel VSGs of Distributed Microgrid Based on Control Mode Switching

Energies, 2023
For the pre-synchronization method of the virtual synchronous generator (VSG), only the case of a single VSG pre-synchronization and grid connection has been studied and analyzed.
Kunyu Dong, Jiaoxin Jia
doaj   +1 more source

Conception Rate of Pre-synchronization and Two Short Term Heat-synch Programs using Two Doses of PGF2α in Lactating Holstein Dairy Cows [PDF]

Iranian Journal of Veterinary Medicine, 2021
BACKGROUND: Improving the reproductive performance of dairy cows requires estrus manipulation using estrus synchronization protocols. OBJECTIVES: The current study aimed to assess the effect of reducing the length of estrus synchronization pro-tocol by ...
Hamid Ghasemzadeh-nava, Mirmoein Bahrami, Vahid Akbarinejad, Seyed Alireza Alavi Tabatabaee   +3 more
doaj   +1 more source

Modifications of the G6G timed-AI protocol improved pregnancy per AI and reduced pregnancy loss in lactating dairy cows

Animal, 2017
In dairy cows, subjected to a G6G protocol, objectives were to determine effects of (1) extending the interval from prostaglandin F2α (PGF2α) to gonadotropin-releasing hormone (GnRH) during presynchronization; and (2) adding a second PGF2α treatment ...
F. Heidari, E. Dirandeh, Z. Ansari Pirsaraei, M.G. Colazo   +3 more
doaj   +1 more source

Circadian vulnerability of cisplatin‐induced ototoxicity in the cochlea

The FASEB Journal, Volume 34, Issue 10, Page 13978-13992, October 2020., 2020
Abstract The chemotherapeutic agent cisplatin is renowned for its ototoxic effects. While hair cells in the cochlea are established targets of cisplatin, less is known regarding the afferent synapse, which is an essential component in the faithful temporal transmission of sound.
Evangelia Tserga, Rocio Moreno‐Paublete, Heela Sarlus, Erik Björn, Eduardo Guimaraes, Christian Göritz, Christopher R. Cederroth, Barbara Canlon   +7 more
wiley   +1 more source

Presynchronous Grid‐Connection Strategy of Virtual Synchronous Generator Based on Virtual Impedance

Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
The virtual synchronous generator (VSG) technology of inverter is widely used to provide the inertia and damping support for power system. However, an additional measurement device PLL (phase‐locked loop) is required in the virtual synchronous generator grid connection to track the voltage phase, amplitude, and frequency, which restricts the flexible ...
Guanfeng Zhang, Junyou Yang, Haixin Wang, Jia Cui, Kai Wang   +4 more
wiley   +1 more source

A novel pre-synchronization control strategy for microgrid connections based on improved droop control

Energy Reports, 2022
Microgrid control strategies based on traditional droop control often exhibit output voltage and frequency return errors. As such, this study proposes a novel pre-synchronization control strategy to improve both the accuracy and stability of voltage and ...
Wenbo Jiang, Pan Li
doaj   +1 more source

Virtual Synchronous Generator Control of VSC‐HVDC System Based on MMC of Hybrid Topology

Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020
For a VSC‐HVDC transmission system based on a hybrid topology converter of full‐bridge and half‐bridge, a kind of virtual synchronous generator (VSG) control strategy which can be applied to modular multilevel converter (MMC) grid‐connected structure was researched and proposed.
Jie Wu, Chuanjiang Li, Zhixiang Zou
wiley   +1 more source

Impact of three different ovulation synchronization protocols on first-service conception rates in postpartum cows [PDF]

Iraqi Journal of Veterinary Sciences
The study was conducted on 60 Holstein dairy cows during 50 and 60 days postpartum in different rural areas in Al-Anbar Province, Iraq. This study evaluated the effects of two ovulation synchronization protocols on postpartum fertility performance ...
Ahmed I. Alsuwaidawi, Hani M. Alrawi
doaj   +1 more source