Results 61 to 70 of about 712 (184)

Design, Modeling, and Experiments of the Vortex‐Induced Vibration Piezoelectric Energy Harvester with Bionic Attachments

Complexity, Volume 2019, Issue 1, 2019., 2019
Since the energy demand increases, the sources of fluid energy such as wind energy and marine energy have attracted widespread attention, especially vortex‐induced vibrations excited by wind energy. It is well known that the lock‐in effect in vortex‐induced vibration can be applied to the piezoelectric energy harvester.
Zunlong Jin, Guoping Li, Junlei Wang, Zhien Zhang, Dimitri Volchenkov   +4 more
wiley   +1 more source

Experimental Verification of the Performance of a Nonlinear Regulator Based on Genetic Algorithms in Improving the Power Quality of DFIG

International Transactions on Electrical Energy Systems, Volume 2026, Issue 1, 2026.
This experimental work investigates the energy control of the doubly fed induction generator. The energy control is performed using a direct power control based on a fractional‐order proportional‐integral (FOPI) regulator. The PI regulator parameters are calculated using a genetic algorithm. The use of this strategy ensures stable operation of the DFIG,
Habib Benbouhenni, Abdessmad Milles, Zakaria Mohamed Salem Elbarbary, Ilhami Colak, Nicu Bizon, Salman Arafath Mohammed, Kanasottu Anil Naik   +6 more
wiley   +1 more source

Study on Fluid‐Induced Vibration Power Harvesting of Square Columns under Different Attack Angles

Geofluids, Volume 2017, Issue 1, 2017., 2017
A model of the flow‐vibration‐electrical circuit multiphysical coupling system for solving square column vortex‐induced vibration piezoelectric energy harvesting (VIVPEH) is proposed in this paper. The quasi steady state theory is adopted to describe the fluid solid coupling process of vortex‐induced vibration based on the finite volume method coupled ...
Meng Zhang, Guifeng Zhao, Junlei Wang, Micol Todesco   +3 more
wiley   +1 more source

Grid‐Connected Control Strategy of Virtual Synchronous Generator Based on Variable Universe Fuzzy Adaptive Control

International Transactions on Electrical Energy Systems, Volume 2025, Issue 1, 2025.
As the proportion of renewable energy sources continues to rise, the stability and reliability of the power system face enormous challenges. Virtual synchronous generators (VSGs) enhance grid stability by simulating conventional synchronous generator characteristics and providing virtual inertia and damping to the system.
Chunhui Liang, Chenglong Huang, Jinfa Li, Xiaoyang Zuo, Renjie Liu, Mohamed Gamal Hussien   +5 more
wiley   +1 more source

A Versatile Coexistence Decision‐Making System for Efficient TV Whitespace Sharing among Whitespace Objects

Wireless Communications and Mobile Computing, Volume 2017, Issue 1, 2017., 2017
A coexistence decision‐making (CDM) system for efficient TV whitespace (TVWS) sharing among whitespace objects (WSOs) is introduced in this paper. The proposed system is considered versatile in functionality as it jointly takes care of three distinct channel allocation features: (a) optimizing system quality of service (QoS) performance metrics, (b ...
M. Asif Raza, Zafar Iqbal, Sang-Seon Byun, Hyunduk Kang, Heung-No Lee, Javier D. S. Lorente   +5 more
wiley   +1 more source

Pre- and post-synchronization methodologies to enhance the efficiency of fixed timed artificial insemination in pharmacologically-controlled breeding systems with Bos indicus-influenced cattle [PDF]

, 2007
Objectives were to: 1) Evaluate the effectiveness of presynchronization with GnRH before the CO??????Synch + CIDR protocol with timed AI (TAI) at 66 h in Bos indicus??????influenced cattle; 2) Characterize ovarian events associated with the ...
Zuluaga Velez, Juan Federico
core   +3 more sources

Pre-synchronisation Protocol by Gonadotropin-releasing Hormones Administration before Ovsynch Protocol Improving Reproductive Performance in Iraqi Cattle

مجلة الانبار للعلوم البيطرية
Aims and Objectives: The aims of this study were to compare the conception rates (CR), calving interval (CI) and days open (DO) after timed artificial insemination (TAI) within an ovulation synchronization protocol or using traditional breeding ...
Koriedi, Ismaeel Saad, Alrawi, Hani Muneeb   +1 more
doaj   +1 more source

Effects of Pre-Synchronization With Prostaglandin F2α and a Progestin, and Delayed Insemination on Pregnancy Rates With Sexed Semen in Replacement Beef Heifers

Frontiers in Animal Science, 2022
To determine the effects of pre-synchronization and delayed fixed-time artificial insemination (TAI) on pregnancy rates (PR/AI) with sexed semen, 1,844 beef heifers were enrolled in a completely randomized design at 12 locations.
Nicola Oosthuizen, Nicola Oosthuizen, Kristina Porter, Samir Burato, Lucas M. Goncalves, Ky G. Pohler, Pedro L. P. Fontes, G. Cliff Lamb   +7 more
doaj   +1 more source

Experimental Investigations on the Wake‐Induced Vibration of an Electromagnetic Energy‐Harvesting System

International Journal of Energy Research, Volume 2024, Issue 1, 2024.
The wake energy of an electromagnetic harvesting device is derived from the phenomena of wake‐induced vibration (WIV). Experiments were conducted to determine the effects of the Reynolds number, the resistance of the circuit, and the distance between two concentric circular cylinders on the wake energy of the flow. The mechanism of the diaphragm energy
Amir Sarviha, Ebrahim Barati, Mehdi Rafati Zarkak, Javad Farrokhi Derakhshandeh, Md. Mahbub Alam, Zhien Zhang   +5 more
wiley   +1 more source

Piezoelectric Wind Energy Harvesting from Self‐Excited Vibration of Square Cylinder

Journal of Sensors, Volume 2016, Issue 1, 2016., 2016
Self‐excited vibration of a square cylinder has been considered as an effective way in harvesting piezoelectric wind energy. In present work, both of the vortex‐induced vibration and unstable galloping phenomenon process are investigated in a reduced velocity (Ur = U/ωn · D) range of 4 ≤ Ur ≤ 20 with load resistance ranging in 100 Ω ≤ R ≤ 1 MΩ.
Junlei Wang, Sheng Wen, Xingqiang Zhao, Min Zhang, Jingyu Ran, Chengkuo Lee   +5 more
wiley   +1 more source