An Accurate Discrete Current Controller for High-Speed PMSMs/Gs in Flywheel Applications av Xiang Zhang, Yunlong Chen, Yves Mollet, Jiaqiang Yang, Johan Gyselinck

“…High-speed Permanent-Magnet Synchronous Motors/Generators (PMSMs/Gs) in a Flywheel Energy Storage System (FESS) are faced with high cross-coupling voltages and low switching-to-fundamental frequency ratios. High cross-coupling voltages between d-q axis current loops lead to transient current errors, which is more serious at lower switching-to-fundamental-frequency ratios. …”
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Fundamental investigation on free-form optimization of vibration lures av Jin-Xing SHI, Masatoshi SHIMODA, Shinobu SAKAI

“…We use the fundamental frequency (i.e., the 1st order) eigenvalue as the objective function and maximize it subject to a weight constraint. …”
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Speech therapy for transgender women: an updated systematic review and meta-analysis av Karine Schwarz, Carla Aparecida Cielo, Poli Mara Spritzer, Anna Paula Villas-Boas, Angelo Brandelli Costa, Anna Martha Vaitses Fontanari, Bruna Costa Gomes, Dhiordan Cardoso da Silva, Maiko Abel Schneider, Maria Inês Rodrigues Lobato

“…However, phonosurgery yielded a greater fundamental frequency gain in the different samples collected. …”
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Pitch in esophageal speech av L. W. Lanham, W. A. Kerr

“…Most reports on pitch in esophageal speech emphasize that it is low-pitched with a measured fundamental frequency rarely higher than 100 cps. Our investigations show, however, that much esophageal 'phonation' lacks periodicity and, therefore, a fundamental frequency (i.e. pitch in the accepted sense). …”
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Klasifikasi Rentang Usia Dan Gender Dengan Deteksi Suara Menggunakan Metode Deep Learning Algoritma Cnn (Convolutional Neural Network) av Vita Karenina, Moh Fiqih Erinsyah, Dega Surono Wibowo

“…In addition to differences in vocal tract size, factors such as length, thickness, and stiffness of the vocal cords also play a role in producing the differences in fundamental frequency between the two genders. Fundamental frequency serves as an indicator used in acoustic analysis to classify gender based on voice. …”
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Ambient noise analysis for characterizing sub-surface dynamic parameters av B., Setiawan, T., Saidi, A., Yuliannur, U., Polom, Putra Jaya, Ramadhansyah, Mohamad Idris, Ali

“…This investigation suggests the fundamental frequency of 0.45 Hz at Location#1 and of 0.65 Hz at Location#2. …”
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Influences of fatigue stiffness degradation of in-service concrete T-beams on natural vibration frequency av Xin-Dai Zuo, Ying-Sheng Ni, Jin-Quan Zhang, Shang-Chuan Zhao

“…This verified the accuracy and reliability of the fundamental frequency calculation formulas and the updated finite element models. …”
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Variation characteristics of key dynamic measurement signals of anchor bolts with different anchorage qualities under pull-out loads av Bing Sun, Cong Zhu, Junhui Zou, Shanyong Wang, Sheng Zeng

“…The results indicated that grouting defects resulted in an increase in wave velocity, along with a decrease in the fundamental frequency and dynamic stiffness of anchor bolts. …”
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Study of harmonic RFID av Monica Jocelynne Handayani.

“…Second Harmonic concept can be used to address this problem by transmitting signals at fundamental frequency and receiving at twice of the fundamental frequency to discriminate the tag return from the clutter return. …”
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Feature extraction of speech signal and heartbeat detection in angry emotion identification av Mohamed, Masnani, Lee, Chee Chuan, Ahmad, Ida Laila

“…Then, Artificial Neural Network (ANN) was used to classify each parameter features such as mean fundamental frequency, maximum fundamental frequency, standard deviation fundamental frequency, mean amplitude, pause length ratio and first formant frequency to recognize the emotion. …”
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Ambient noise analysis for characterizing sub-surface dynamic parameters av B., Setiawan, T., Saidi, A., Yuliannur, U., Polom, Putra Jaya, Ramadhansyah, Mohamad Idris, Ali

“…This investigation suggests the fundamental frequency of 0.45 Hz at Location#1 and of 0.65 Hz at Location#2. …”
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Non-contact measurement of vibrations using deferred moiré patterns av Vladimir Saveljev, Jung-Young Son, Hyoung Lee, Gwanghee Heo

“…The experimental measurements of the fundamental frequency are in accordance with the theory of square beams. …”
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Instability and ultra-high frequency spectrum pulse train in passively Q-switched Yb:LuAG ceramic laser av Min Dai

“…The pulse trains consist of a low-frequency harmonic spectrum pulse train with a fundamental frequency below 500 KHz as the source and an ultra-high-frequency harmonic spectrum pulse train with an exciting fundamental frequency above 104 KHz. …”
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KhoramAbadi Luri Monophthongs: An Acoustic Study av Nasim Vafaei, Mandana Nourbakhsh, Homa Asadi

“…The result showed that /a/ has the lowest fundamental frequency; /e/ and /ʏ/ have the highest amount of this parameter in male and female speakers, respectively. …”
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Adaptive Phasor Estimation Algorithm Based on a Least Squares Method av Woo-Joong Kim, Soon-Ryul Nam, Sang-Hee Kang

“…This model is designed to incorporate fundamental frequency, and harmonic and constant components. …”
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No evidence that averaging voices influences attractiveness av Jessica Ostrega, Victor Shiramizu, Anthony J. Lee, Benedict C. Jones, David R. Feinberg

“…By contrast with these results for fundamental frequency, vocal attractiveness and formant frequencies were not significantly correlated. …”
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Acoustic structure and information content of trumpets in female Asian elephants (Elephas maximus). av Evelyn Fuchs, Veronika C Beeck, Anton Baotic, Angela S Stoeger

“…We documented a mean fundamental frequency ± SD of 474 ± 70 Hz and a mean duration ± SD of 1.38 ± 1.46 s (Nindiv. = 6, Ncalls = 206). …”
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Real-Time Filter Method Based on the Structural Frequency of FAST Cabin-Cable System av Wenhua Xu, Hong Bao, Jianwei Mi, Guigeng Yang

“…Finally, the results of the experiments on the FAST 5 m model show that calculating the fundamental frequency is accurate and the filter is effective.…”
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Speed Control of Induction Motor Using Variable Frequency Driver (VFD) Method Based On Arduino Nano av Rusdi Muhamad, Jayadi Jayadi, Mangera Paulus, Ponadi Acep, Wakole Petrus

“…Fundamental frequency manipulation takes place during the conversion process. …”
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Low frequency groans indicate larger and more dominant fallow deer (Dama dama) males. av Elisabetta Vannoni, Alan G McElligott

“…Groans of high-ranking males were characterised by lower minimum fundamental frequencies and to a lesser extent, by lower formant dispersions. …”
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