Results 81 to 90 of about 712 (184)

An Adaptive-Feedforward Power Decoupling for Grid-Forming Converters with Pre-Synchronization via Sliding-Mode Control

Energies
The grid-forming (GFM) converter is an effective solution for grid support. However, mode switching failures and power coupling challenges in weak grids pose significant safety risks.
Qicai Ren, Zefeng Xu, Rongcai Pan, Tong Liu, Yanxu Zhang, Chao Sheng   +5 more
doaj   +1 more source

Efficiency Comparison between Two Systematic Breeding Protocols: Target Breeding and Presynchronization Program At a Large Central Valley Dairy Farm [PDF]

, 2012
As dairy herd sizes increase, dairymen often initiate systematic breeding programs on their dairy in order to improve their reproduction efficiency. The objective of this study, compares systematic breeding program by comparing reproductive efficiency ...
Alvernaz, Blake
core  

Effect of Synchronization Protocols on Follicular Development and Estradiol and Progesterone Concentrations of Dairy Heifers

, 2008
The objectives were to evaluate the effect of synchronization protocols on follicular development and estradiol 17-β (E2) and progesterone (P4) concentrations in dairy heifers. In experiment 1, 36 heifers were assigned to 1 of 6 synchronization protocols
Chebel, R.C, Stevenson, J.L, Ahmadzadeh, A, Santos, J.E.P, Dalton, J.C, Sartori, R   +5 more
core   +1 more source

Progesterone concentration and conception rates after three different synchronization protocols in dairy cows [PDF]

, 2017
Ovsynch je sinkronizacijski protokol koji se rutinski koristi u poslijeporo.ajnim sinkronizacijskim i resinkronizacijskim postupcima u mlije.nih krava.
Štibrić, Goran, Romić, Željko, Dobranić, Tomislav, Branimira Špoljarić, Željko Romić, Špoljarić, Branimira, Juraj Grizelj, Marko Samardžija, Tomislav Dobranić, Grizelj, Juraj, null null, Samardžija, Marko, Unić, Andriana, Goran Štibrić, Andriana Unić, Darko Gereš, Silvijo Vince, Vince, Silvijo   +17 more
core   +1 more source

An Improved Grid-connected Pre-Synchronization Method based on Virtual Synchronous Generator Control in Power Conversion System [PDF]

E3S Web of Conferences
Under the background of vigorously promoting the construction of new power system，the power conversion system(PCS) plays an important role to transfer high reliable electrical power quality to grid.
Shasha Chen, Jinghua Zhou, Shukuraliev Abrorbek, Yifei Sun   +3 more
doaj   +1 more source

Altering duration of the presynchronization period in a long-term progestin-based estrus synchronization protocol for timed artificial insemination of beef heifers.

Theriogenology, 2019
An experiment was designed to evaluate the effect of extending duration of the presynchronization treatment in a long-term progestin-based estrus synchronization protocol. Heifers were assigned to either an 18 d (Day 0-18) or 14 d (Day 4 to Day 18) CIDR®
E. Knickmeyer, Jordan M. Thomas, J. Locke, R. Bonacker, Lauren A. Ciernia, J. Ketchum, Mark R. Ellersieck, Scott E. Poock, Michael F. Smith, D. Patterson   +9 more
semanticscholar   +1 more source

Fertility of lactating dairy cows inseminated with sex-sorted or conventional semen after Ovsynch, Presynch–Ovsynch and Double-Ovsynch protocols

, 2019
The objective was to compare pregnancy per artificial insemination (P/AI) with conventional (CS) or sex-sorted semen (SS) in dairy cows subjected to one of the three timed AI protocols.
Santos, Jose E. P., Gümen, Ahmet, Karakaya, Ebru Bilen   +2 more
core   +1 more source

Pre-synchronization control strategy for grid connection of GFM converter based on LADRC

Science and Technology for Energy Transition
The grid-forming (GFM) converter simulates the rotor characteristics of a synchronous motor through the application of the virtual synchronous generator control (VSG), providing crucial inertia and damping support for the grid connection of distributed ...
Wang Zhixiang, Han Minxiao, Xie Wenqiang, Xia Mingqi, Luo Tian   +4 more
doaj   +1 more source

A COMPARATIVE STUDY OF PRE-SYNCHRONIZATION PROTOCOLS G7G AND eCG PROTOCOL IN DAIRY COWS IN ANBAR GOVERNORATE, IRAQ [PDF]

Assiut Veterinary Medical Journal
This study was conducted on privately-owned dairy farms in Al-Anbar Province, Iraq, from July 2023 to January 2024. The aim of the study was to evaluate the impact of timed artificial insemination (TAI) on the calving interval (CI), days open (DO), and ...
HANI ALRAWI, ‪ISMAEL KORIDI
doaj   +1 more source

Presynchronization with CIDR improved the efficiency of ovsynch in the cyclic and acyclic Postpartum Pluriparous Cows [PDF]

, 2017
The postpartum period is considered an important period in the reproductive life of dairy cows. This study was aimed to evaluate the effect of progesterone (P4)-CIDR supplementation in the course of Ovsynch regimens in postpartum Holstein-Friesian dairy ...
Alaa Eldin Zain Elabdeen, Ahmed Ahmed, Omar Zain   +2 more
core   +2 more sources