Showing 701 - 720 results of 848 for search '"high frequency"', query time: 0.06s Refine Results
  1. 701
  2. 702

    Machine learning based compact MIMO antenna array for 38 GHz millimeter wave application with robust isolation and high efficiency performance by Md. Ashraful Haque, Md. Sharif Ahammed, Soeung Socheatra, Redwan A. Ananta, Md. Jamal Hossain Nirob, Narinderjit Singh Sawaran Singh, Noorlindawaty Md. Jizat, Saeed Alsowail, Samir Salem Al-Bawri

    Published 2025-03-01
    “…Designing a small MIMO antenna for 38 GHz mm-wave 5 G applications presents challenges because it requires balancing high performance while minimizing mutual coupling between closely spaced elements and dealing with high-frequency complexities.…”
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    Article
  3. 703

    Simulation study on converter transformer windings stress characteristics under harmonic current and temperature rise effect by Jing Xu, Jian Hao, Ning Zhang, Ruijin Liao, Yun Feng, Wenlong Liao, Huanchao Cheng

    Published 2025-04-01
    “…High-frequency harmonic current leads to temperature increases and uneven stress distribution within ultra-high-voltage (UHV) converter transformer windings. …”
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  4. 704

    Wide-Gap p-μc-Si1-xOx:H Films and Their Application to Amorphous Silicon Solar Cells by Taweewat Krajangsang, Sorapong Inthisang, Aswin Hongsingthong, Amornrat Limmanee, Jaran Sritharathikhun, Kobsak Sriprapha

    Published 2013-01-01
    “…Optimization of p-type hydrogenated microcrystalline silicon oxide thin films (p-μc-Si1-xOx:H) by very high frequency plasma enhanced chemical vapor deposition 40 MHz method for use as a p-layer of a-Si:H solar cells was performed. …”
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    Article
  5. 705

    Risk Probability Assessment of Annual Extreme Precipitation in Fujian by Yang Xinyu, Zhang Rongyan, Xu Hong, Wu Dixi

    Published 2025-01-01
    “…Southeastern coastal areas and northwestern mountainous regions are identified as locations characterized by both a high total amount of extreme precipitation and a high frequency of extreme precipitation days. In contrast, northeastern coastal regions experience high total precipitation but relatively fewer extreme precipitation days, indicating a distinct spatial variability across Fujian. …”
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  6. 706

    Evasion of Early Antiviral Responses by Herpes Simplex Viruses by Paula A. Suazo, Francisco J. Ibañez, Angello R. Retamal-Díaz, Marysol V. Paz-Fiblas, Susan M. Bueno, Alexis M. Kalergis, Pablo A. González

    Published 2015-01-01
    “…Herpes simplex virus-1 (HSV-1) and herpes simplex virus-2 (HSV-2) infect humans at a high frequency and persist within the host for life by establishing latency in neurons. …”
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    Article
  7. 707

    Evaluation of the Single-component Thermal Dust Emission Model in Cosmic Microwave Background Experiments by Hao Liu, Jia-Rui Li, Yi-Fu Cai

    Published 2025-01-01
    “…Upon the former, previous works usually depend on a more complicated model to improve the single-component dust emission; however, our method is free from any additional model, and is sensitive enough to directly discover a substantial discrepancy between the Planck High Frequency Instrument data (100–857 GHz) and associated single-component dust emission estimations. …”
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    Article
  8. 708

    Effects of Smoking on Intima-Media Thickness of the Common Carotid Artery Using Ultrasonography by Asmaa Mustafa Alsiddig, Ibrahim Abdelrhim Ali

    Published 2024-01-01
    “…The practical part was conducted in Khartoum State at Al Raqi University Hospital using the E-CUBE 8-ALPINION and at Yastbshroon Hospital using the Fukuda Denshi Sefius UF890AG with a high-frequency linear transducer (7–10 MHz). Scanning was performed in the supine position with the neck extended. …”
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    Article
  9. 709

    Dual band four port MIMO antenna with dual circular polarization for Wi-Fi/WiMAX applications by Poonam Thanki, Trushit Upadhyaya, Upesh Patel, Khaled Aliqab, Meshari Alsharari, Ayman A. Althuwayb, Ammar Armghan, Vishal Sorathiya

    Published 2025-01-01
    “…The 60 mm × 60 mm antenna is designed from FR4 material, which is inexpensive and has a 1.6 mm thickness. Using a high-frequency structure simulator (HFSS), the suggested MIMO antenna is designed and optimized. …”
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    Article
  10. 710

    Unleashing the potential of chatbots in mental health: bibliometric analysis by Qing Han, Chenyang Zhao

    Published 2025-02-01
    “…The keyword co-occurrence network highlights the prominent techniques in this multidisciplinary area and reveals 5 research topics, showing a significant overlap between clusters. High-frequency terms such as “ChatGPT”, “machine learning”, and “large language models” underscore the current state of research, highlighting the cutting-edge advancements and frontiers in this field.ConclusionsThis study provides an in-depth analysis of the most prominent countries, institutions, publications, collaboration status, and research topics associated with utilization of chatbots in mental health over the last decade. …”
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  11. 711

    Inhibiting surface and subsurface damage in ultrasonic vibration-assisted ultraprecision diamond cutting of high-entropy alloy by Yintian Xing, Yue Liu, Yuhan Li, Tengfei Yin, Denghui Li, Changxi Xue, Wai Sze Yip, Suet To

    Published 2025-01-01
    “…This is achieved through comprehensive comparisons of the workpiece surface, subsurface features, chip morphology, and tool damage in cutting processes with and without high-frequency ultrasonic vibration assistance. Results indicate that the diverse machinability advantages of HEAs in intermittent cutting can effectively inhibit surface and subsurface damage, including better cutting stability, smoother material removal, and lower tool wear. …”
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  12. 712

    Field Development Optimization for Low-Productivity Gas Wells under Intermittent Production by Wei Tian, Yi Liu, Xuri Li, Youliang Jia, Yixuan Wang, Li Li, Zhengyan Zhao, Weihong Ding, Wenxin Zhou, Wenyue Sun

    Published 2024-12-01
    “…A total of 110,000 key cycle parameters dataset extracted from high-frequency raw data of 304 wells is used in the model training process. …”
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  13. 713

    Effectiveness of Voytik-Harbin Protocol in Fabrication of Ram’s Testicular-Derived Hydrogel and Its Impact on Mouse In Vitro Spermatogenesis by Leila Rashki Ghaleno, Tohid Rezaei Topraggaleh, Leila Montazeri, Abdolhossein Shahverdi, Mojtaba Rezazadeh Valojerdi

    Published 2025-01-01
    “…Followingmouse testicular cell culture, TDH and collagen hydrogel did not differ significantly in terms of cell survival ratesand the mRNA expression of early spermatogenesis genes.Conclusion: Using the VH protocol for producing ram TDH resulted in a firm hydrogel with a high frequency ofrepeat, which may be suited for testicular cell growth.…”
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  14. 714

    Autonomic Nervous System Activity before Atrial Fibrillation Onset as Assessed by Heart Rate Variability by Jean-Marie Grégoire, Cédric Gilon, François Marelli, Pascal Godart, Hugues Bersini, Stéphane Carlier

    Published 2025-01-01
    “…We measured a statistically significant increase in very-low-frequency (VLF), low-frequency (LF), high-frequency (HF), RMSSD and pNN50 between 35 minutes and 5 minutes before AF onset. …”
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  15. 715

    2.1 W/mm Output Power Density at 10 GHz for H-Terminated Diamond MOSFETs With (111)-Oriented Surface by Bing Qiao, Pengfei Dai, Xinxin Yu, Zhonghui Li, Ran Tao, Jianjun Zhou, Rui Shen, Tangsheng Chen

    Published 2024-01-01
    “…These results demonstrate that the output current and output power can be improved by using a (111)-oriented diamond, which is benefit for high-frequency and high-power RF devices.…”
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  16. 716
  17. 717

    Design and Characterization of Line-Waves Waveguides for Microwave Applications by Alessio Monti, Stefano Vellucci, Mirko Barbuto, Valentina Verri, Francesco Verni, Claudio Massagrande, Davide Ramaccia, Michela Longhi, Zahra Hamzavi-Zarghani, Luca Stefanini, Alessandro Toscano, Filiberto Bilotti

    Published 2025-01-01
    “…Finally, experimental results for some selected designs in the microwave regime are provided, and a thoughtful comparison between a line-wave waveguide and an equivalent microstrip transmission line is carried out to assess the suitability of these devices for efficient high-frequency waveguiding.…”
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  18. 718

    Host-Parasite Interactions in Individuals with Type 1 and 2 Diabetes Result in Higher Frequency of Ascaris lumbricoides and Giardia lamblia in Type 2 Diabetic Individuals by Eleuza Rodrigues Machado, Núbia Oliveira Matos, Sinione Morais Rezende, Daniela Carlos, Thauana Cristina Silva, Leônia Rodrigues, Maria Jarlene Rodrigues Almeida, Maria Regina Fernandes de Oliveira, Maria Imaculada Muniz-Junqueira, Rodrigo Gurgel-Gonçalves

    Published 2018-01-01
    “…Autoimmune response developed in type 1 diabetic individuals characterized by the production of Th1 cytokines could explain low frequency of G. lamblia. High frequency of parasites found in type 2 diabetes emphasizes the importance of periodic parasitological examinations in these individuals.…”
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  19. 719

    An Experimental Investigation on the Relationship between MS Frequency Response and Coal and Gas Outburst by Quanjie Zhu, Qingsong Li, Yu Feng, Xianwei Heng, Shaoquan Li, Tao Yang

    Published 2018-01-01
    “…CGOB presents varying characteristics, such as “valley-peaks-valley”. (2) From the incubation stage to happen stage of outburst, the spectrum significantly moved from extremely low frequency (100-200 Hz) to high-frequency band (approach to 1600 Hz). During the residual stage, MS frequency manifested the concentration distribution (50 Hz) and offered the advantage of energy concentration. (3) The phenomenon of signal energy also shows the trend of energy transform low to high and to low modes along with the process. …”
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  20. 720

    Magnetic resonance imaging does not distinguish Kallmann syndrome from normosmic isolated hypogonadotropic hypogonadism by Małgorzata Kałużna, Katarzyna Katulska, Katarzyna Ziemnicka, Pola Kompf, Bartłomiej Budny, Paweł Komarnicki, Michał Rabijewski, Jerzy Moczko, Jarosław Kałużny, Marek Ruchała

    Published 2025-01-01
    “…Conclusions: MRI cannot exclusively differentiate between KS and nIHH, as both conditions may present with OB and OS abnormalities. A surprisingly high frequency of olfactory system abnormalities was observed in nIHH patients, while anterior pituitary hypoplasia was prevalent across all IHH patients. …”
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