Готові списки джерел за темами / Wide operating frequency

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Добірка наукової літератури з теми "Wide operating frequency"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Wide operating frequency"

Pan, Yu Fei, Shao Yong Zheng, Yong Mei Pan, Yuan Xin Li, and Yun Liang Long. "A Frequency Tunable Quadrature Coupler With Wide Tuning Range of Center Frequency and Wide Operating Bandwidth." IEEE Transactions on Circuits and Systems II: Express Briefs 65, no. 7 (2018): 864–68. http://dx.doi.org/10.1109/tcsii.2017.2738662.

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Alsaif, H. "Highly Compact Design of Trimmed Patch with Modified Partial Ground Structure for Extreme-Wideband Systems." Engineering, Technology & Applied Science Research 7, no. 5 (2017): 1918–21. https://doi.org/10.5281/zenodo.1037164.

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In this paper, a novel highly compact microstrip monopole antenna with adjusted ground plane for ultra-wideband (UWB) applications is proposed. The patch antenna is composed of a trimmed radiator and rectangular ground plane with four slots providing relatively extreme wide operating frequency from 2.8 till 16.2 GHz based on -10 dB criteria. The high matching impedance in the design results in ultra-wide bandwidth that covers the entire BW allocated by FCC for UWB applications. At the same time, the presented antenna is distinguished by significantly miniaturized structure with total size of 1

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Arslan, Saad, Syed Asmat Ali Shah, and HyungWon Kim. "An Ultra-Wide Load Range Voltage Converter Using Proactive Phase Frequency Modulation for IoT Sensors." Sensors 20, no. 21 (2020): 6279. http://dx.doi.org/10.3390/s20216279.

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Modern sensor nodes have multiple operating states, which causes a conventional voltage converter to perform poorly over a wide load range of the operating states. This paper proposes a voltage converter whose switching frequency and output voltage are proactively adjusted to maintain high conversion efficiency. This allows the converter to exploit a wider frequency range to cover a wide load range. In addition, the proposed converter uses multiple smaller capacitor banks and employs multiphase operation to provide low output ripple voltage. A distributed topology for non-overlapping signal ge

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Liao, Yilong, and Xiangning Fan. "A Low-voltage Programmable Frequency Divider with Wide Input Frequency Range." ITM Web of Conferences 17 (2018): 01007. http://dx.doi.org/10.1051/itmconf/20181701007.

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A low-voltage programmable frequency divider with wide input frequency range is fabricated in standard 0.18µm TSMC RF CMOS technology and presented in this paper. Considering the frequency division ratio of dual-modulus prescaler is relatively smaller, a programmable divider with full custom design is used to increase the frequency division ratio and the maximum operating frequency. The frequency division ratio of the programmable frequency divider covers from 64 to 255. And the measured results show that the programmable divider works correctly when the input frequency varies from 0.5 GHz to

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Cárcamo, Alberto, Alejandro Fernandez-Hernandez, Fernando Gonzalez-Hernando, Aitor Vázquez, and Alberto Rodríguez. "Variable Switching Frequency for ZVS over Wide Voltage Range in Dual Active Bridge." Electronics 13, no. 10 (2024): 1800. http://dx.doi.org/10.3390/electronics13101800.

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The Dual Active Bridge (DAB) converter is known for its advantageous characteristics, including bidirectionality, galvanic isolation, and soft-switching operation. However, achieving Zero Voltage Switching (ZVS) across the complete operation range is not guaranteed, particularly through a wide input–output voltage ratio. This paper explores the integration of the switching frequency as a control variable in the DAB converter to ensure ZVS operation across a wide voltage range, employing Single Phase Shift (SPS) modulation. The study evaluated the RMS and reactive currents under variable switch

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Abdulhussein, Nabil, and Abdulkareem Abdullah. "Design of a Wide Dual-Band Coplanar Probe Feed Antenna for WLANs Applications." 3D SCEEER Conference sceeer, no. 3d (2020): 13–16. http://dx.doi.org/10.37917/ijeee.sceeer.3rd.2.

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This paper presents a new design to obtain wide dual-band operation from a coplanar probe feed antenna loaded with two shorted walls. The lower band of proposed antenna has a 10 dB bandwidth of 611 MHz (24.18%) around the center frequency 2527MHz, and the upper band has a bandwidth of 1255 MHz (27.88%) around the center frequency 4501MHz. The obtained bandwidths cover WLANs operations on all bands. The bandwidth of the first operating frequency covers ISM band (2400-2483.5) MHz, which is required by IEEE 802.11b, g and Bluetooth standards, and the bandwidth of the second operating frequency co

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Kaissoine, Abdou, and Bernard Huyart. "New three-phase demodulator circuit operating in a wide frequency range." Microwave and Optical Technology Letters 57, no. 8 (2015): 1825–31. http://dx.doi.org/10.1002/mop.29205.

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Awan, Wahaj Abbas, Syeda Iffat Naqvi, Wael Abd Ellatif Ali, et al. "Design and Realization of a Frequency Reconfigurable Antenna with Wide, Dual, and Single-Band Operations for Compact Sized Wireless Applications." Electronics 10, no. 11 (2021): 1321. http://dx.doi.org/10.3390/electronics10111321.

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This paper presents a compact and simple reconfigurable antenna with wide-band, dual-band, and single-band operating modes. Initially, a co-planar waveguide-fed triangular monopole antenna is obtained with a wide operational frequency band ranging from 4.0 GHz to 7.8 GHz. Then, two additional stubs are connected to the triangular monopole through two p-i-n diodes. By electrically switching these p-i-n diodes ON and OFF, different operating frequency bands can be attained. When turning ON only one diode, the antenna offers dual-band operations of 3.3–4.2 GHz and 5.8–7.2 GHz. Meanwhile, the ante

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Kalathy, Abirami, Arpan Laha, Majid Pahlevani, and Praveen Jain. "A Low Q Three-Phase Series Resonant Converter for PV Applications." Energies 16, no. 4 (2023): 1707. http://dx.doi.org/10.3390/en16041707.

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In this paper, a soft-switched three-phase resonant converter with a low quality factor (Q) design is proposed for Photovoltaic (PV) energy harvesting systems with a very wide range of operating conditions. Due to the low quality factor (Q ≤ 1), the voltage stress across the capacitors is drastically reduced. However, a major challenge of using a low Q design is the wide switching frequency range required for operation over a wide range of load and input conditions. In order to reduce the switching frequency range, this paper introduces a hybrid modulation technique employing asymmetric pulse

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Morton, P. A., V. Mizrahi, P. A. Andrekson, et al. "Mode-locked hybrid soliton pulse source with extremely wide operating frequency range." IEEE Photonics Technology Letters 5, no. 1 (1993): 28–31. http://dx.doi.org/10.1109/68.185050.

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Більше джерел

Дисертації з теми "Wide operating frequency"

Ashton, Phillip Michael. "Exploiting phasor measurement units for enhanced transmission network operation and control." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9063.

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In order to achieve binding Government targets towards the decarbonisation of the electricity network, the GB power system is undergoing an unprecedented amount of change. A series of new technologies designed to integrate massive volumes of renewable generation, predominantly in the form of offshore wind, asynchronously connecting to the periphery of the transmission system, are transforming the requirements of the network. This displacement of traditional thermal generation is leading to a significant reduction in system inertia, thus making the task of system operation more challenging. It

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Gardner, Robert Matthew. "A Wide-Area Perspective on Power System Operation and Dynamics." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26779.

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Classically, wide-area synchronized power system monitoring has been an expensive task requiring significant investment in utility communications infrastructures for the service of relatively few costly sensors. The purpose of this research is to demonstrate the viability of power system monitoring from very low voltage levels (120 V). Challenging the accepted norms in power system monitoring, the document will present the use of inexpensive GPS time synchronized sensors in mass numbers at the distribution level. In the past, such low level monitoring has been overlooked due to a perceived

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Liu, Cheng-wei, and 劉正偉. "Wide Operating Frequency Range and High Accuracy Digital Pulse Width Modulator with Digital Self-Calibration." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/z6e768.

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碩士 國立臺灣科技大學 電子工程系 99 Two wide operation frequency range and high accurary digital pulse width modulators (DPWM) with digital self-calibration are explored in this thesis. Their most popular applications are the DC-DC converter, LED driver, motor control and class-D amplifier. High performance 12-bits digital pulse width modulator (DPWM) based on pulse shrinking delay line with extremely first simple structure is proposed in this thesis. By digitally calibrating the amount of delay line pulse shrinking, it can achieve 97 kHz ~ 2 MHz wide range operation frequency and 1.249 mW low po

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Chien, Ching-Shan. "Design of a Fast-Locking DLL-Based Frequency Multiplier for Wide-Range Operation." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0002-2901200719242600.

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Chien, Ching-Shan, and 簡靜珊. "Design of a Fast-Locking DLL-Based Frequency Multiplier for Wide-Range Operation." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/65810126883391966465.

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碩士 淡江大學 電機工程學系碩士班 95 The multiphase clocks are usually required in a system-on-chip design. The phase-locked loop (PLL) provides a well locking loop for the synchronization of clocks. However, the inherent high-order loop in the PLL and the jitter accumulation of the VCO make it difficult to design a high-performance PLL. Consequently, the delay-locked loop (DLL) is increasingly preferred rather than PLL due to no jitter accumulation in the voltage-controlled delay line (VCDL) and it is inherently a stable first-order system. Although the problem of jitter accumulation does not

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Lin, Guan-Yu, and 林冠宇. "Design of Ultra Wide Locking Range and Operation Range Injection-Locked Frequency Divider." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/61069659735772014841.

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碩士 國立臺灣科技大學 電子工程系 103 In a RF transceiver system, PLL is a part not only important but also indispensable, PLL include Phase Frequency Detector (PFD),Charge Pump (CP),Loop Filter (LF),Voltage Controlled Oscillator (VCO), and Frequency Divider (FD),low-power, low phase noise, wide operating frequency range are what we focus on , and they are the most important performance of the VCO and Divider. First, we proposes an ultra-wide-locking-range CMOS divide-by-3 injection-locked frequency dividers (ILFD). The fabricated 0.18 μm CMOS ÷3 ILFD uses cross-coupled switching transistors, dir

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Lin, Chih-Yuan, and 林志遠. "Design of Open Loop Multiple Split-Ring Resonator Voltage-Controlled Oscillator and Wide-Operation Range ÷ 3 Injection-Locked Frequency Divider." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/6av8q9.

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碩士 國立臺灣科技大學 電子工程系 102 The important blocks in the phase locked loop (PLL) are the voltage controlled oscillator (VCO) and the divider circuit. The most power consumption of PLL consumes in VCO and divider. The VCO is requested a low phase-noise to avoid corrupting the mixer-converted signal by close interfering tones for VCO circuit, and the Figure of Merit (FOM) of VCO can be determined by it’s performance. Firstly, this thesis designs complementary Colpitts voltage controlled oscillator, A 0.7GHz Colpitts oscillator is designed and implemented in a 0.18μm CMOS 1P6M process. It

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Книги з теми "Wide operating frequency"

Solymar, L., D. Walsh, and R. R. A. Syms. Artificial materials or metamaterials. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198829942.003.0015.

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The difference between natural and artificial materials is explained. The equivalent plasma frequency of wire media is derived. A list of metamaterial resonators is presented. The possibility of achieving negative refraction and its significance are discussed. It is shown that under certain circumstances it is possible to produce a perfect lens that could transfer evanescent waves aswell. Themulti-layer lens is shown to have advantages over the single-layer lens. The operation of a SiC lens based on the negative dielectric constant due to optical phonons is discussed. Detectors for magnetic re

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Tóthová, Zuzana. Hotely. SPEKTRUM Publishing, 2024. http://dx.doi.org/10.61544/sini6665.

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The publication is primarily intended as educational literature for architecture students, applicable to both foundational typology courses and advanced studies in upper-level subjects. It will serve a vital role in studio design courses focused on residential buildings, as it provides an advanced perspective on the relevant topics within this field. The textbook describes hotels through their historical development up to contemporary hotel forms, which are still frequently utilized types in the construction of transitional accommodation. These must flexibly respond to new, innovative solution

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Fremont-Barnes, Gregory, ed. History of Counterinsurgency. ABC-CLIO, LLC, 2015. http://dx.doi.org/10.5040/9798216972600.

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This two-volume history of counterinsurgency covers all the major and many of the lesser known examples of this widespread and enduring form of conflict, addressing the various measures employed in the attempt to overcome the insurgency and examining the individuals and organizations responsible for everything from counterterrorism to infrastructure building. How and when should counterinsurgency be pursued as insurgency is growing in frequency and, conversely, while conventional warfare continues to decline as a means by which political rivals seek to impose their will upon each other? What l

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Fremont-Barnes, Gregory, ed. History of Counterinsurgency. ABC-CLIO, LLC, 2015. http://dx.doi.org/10.5040/9798216972594.

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Brian C, Kalt. Unable. Oxford University Press, 2019. http://dx.doi.org/10.1093/law/9780190083199.001.0001.

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Since President Trump’s election, Section 4 of the Twenty-Fifth Amendment has been a frequent topic of public discussion. It has also become a mainstay in television dramas, which usually present it inaccurately.The country needs this complicated but essential topic explained. Unable: The Law, Politics, and Limits of Section 4 of the Twenty-Fifth Amendment is designed to educate and inform the public about Section 4 in an even-handed and accessible way. This book is not about President Trump; it offers no opinions on his fitness for office. By the end of the book, though, it will be clear how

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Alonso-Minutti, Ana R., Eduardo Herrera, and Alejandro L. Madrid, eds. Experimentalisms in Practice. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190842741.001.0001.

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This book problematizes the notion of experimentalism as defined in conventional narratives about experimental musical practices. Contributors take a broad approach to a wide variety of Latin@ and Latin American music traditions conceived and/or perceived as experimental. The adoption of a plural “experimentalisms” points at a purposeful decentering of its usual US and Eurocentric interpretative frameworks. The case studies in this book contribute to this by challenging discourses about Latin@s and Latin Americans that have historically marginalized them. As such, the notion of “experimentalis

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Частини книг з теми "Wide operating frequency"

Yizhuo, Wang, Li Zhonlian, Li Long, Li Runhua, Cui Xinglei, and Fang Zhi. "Prediction and Evaluation Method of Modification Effect of Large-Scale DBD Insulation Materials Based on Distributed Current Measurement and Neural Network Model." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-4856-6_8.

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Abstract Wide dielectric barrier discharge (DBD) has broad application prospects in the modification of insulating materials, but the aging of the electrode directly affects the modification effect in the application process. As the size of the DBD device increases, the real-time evaluation of its modification effect becomes more complicated. Therefore, this paper proposes a real-time prediction and evaluation method for the modification effect of wide DBD insulation materials based on distributed current measurement and neural network model. The operating condition parameters such as DBD exci

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Sha, Deshang, and Guo Xu. "Three-Level Bidirectional DC–DC Converter with an Auxiliary Inductor in Adaptive Working Mode for Full-Operation Zero-Voltage Switching." In High-Frequency Isolated Bidirectional Dual Active Bridge DC–DC Converters with Wide Voltage Gain. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0259-6_6.

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Colin, Angel. "Design of Wide Band Bow-Tie Slot Antennas for Multi-Frequency Operation in CMB Experiments." In Astrophysics and Space Science Proceedings. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11250-8_138.

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Tang, Qiuhong, Xiaobo Yun, Jie Wang, et al. "Water Hazards: Drought and Flood." In Water Resources in the Lancang-Mekong River Basin: Impact of Climate Change and Human Interventions. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-0759-1_7.

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AbstractDroughts and floods are the main threats to the Lancang-Mekong River Basin (LMRB). Drought mainly occurs during the dry season, especially in March and April, in the LMRB. The “dry gets drier” paradigm performs well in the LMRB, specifically in the Mekong Delta. Further, flood frequency and magnitude, which are determined by heavy rain, are also increasing in the LMRB. Droughts and floods show obvious seasonal and regional characteristics in the LMRB. The LMRB is a well-known rainstorm-flood basin. Floods in the LMRB are mainly caused by heavy rain. The LMRB is dominated by regional fl

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Uthansakul, Monthippa, and Marek E. Bialkowski. "Wideband Smart Antenna Avoiding Tapped-Delay Lines and Filters." In Handbook on Advancements in Smart Antenna Technologies for Wireless Networks. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-59904-988-5.ch024.

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This chapter introduces the alternative approach for wideband smart antenna in which the use of tapped-delay lines and frequency filters are avoidable, so called wideband spatial beamformer. Here, the principles of operation and performance of this type of beamformer is theoretically and experimentally examined. In addition, its future trends in education and commercial view points are identified at the end of this chapter. The authors hope that the purposed approach will not only benefit the smart antenna designers, but also inspire the researchers pursuing the uncomplicated beamformer operat

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Kumar, Neetendra, Neeraj Yadav, Mayank Singh, and Ramesh Kumar Verma. "Development of Antenna Using Flexible Material for Wide Band Application." In Advances in Medical Technologies and Clinical Practice. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-4026-4.ch010.

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This chapter illustrates a wearable antenna operating WLAN, C-band. Consumers today are looking for items they can take on the go without needing to break their backs carrying them. This makes broad range antenna demand broadband property in the lower power IoT apparatus, and hence, a wideband flexible dipole antenna intended for low-control internet of things gadgets has been produced on a fun substrate because some customers have requested it. This was to permit a flexible-structured substrate antenna. Naturally, the antenna is fairly small too, and works at a frequency band of 3.85 to 9.38

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Rahim, Abdul, and Praveen Kumar Malik. "Analysis and Design of Planner Wide Band Antenna for Wireless Communication Applications." In Design Methodologies and Tools for 5G Network Development and Application. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4610-9.ch010.

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Microstrip patch antennas are widely used for enormous wireless applications as they are very compact in size and easy to fabricate and are highly recommended for multiband applications. The antenna must be designed in such a way that a single antenna can be used for multiple applications and multiple frequency ranges with smooth shifting of operating frequency. The antenna must be a wideband such that it can witness the communication between the devices in wireless environment for various applications. This chapter brings some of the important designs which are proposed by various remarkable

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Amraoui, Youssef, Imane Halkhams, Rachid El Alami, Mohammed Ouazzani Jamil, and Hassan Qjidaa. "Analysis and Design of a Rectangular Microstrip Antenna for RFID Applications." In Advances in Computational Intelligence and Robotics. IGI Global, 2024. http://dx.doi.org/10.4018/979-8-3693-3775-2.ch025.

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Radio frequency identification (RFID) is a non-contact identification technology that employs radio frequency waves. Currently, the use of RFID technology has begun to generalize to a wide variety of application areas: credit cards, biometric passports, security badges, toll booths, secure identification, inventory systems, and so on. This technology allows objects or persons to be detected or remotely identified by sending an RF signal from the reader across the electromagnetic waves to the tag. In turn, the antenna of this tag receives these waves and supplies the chip that interprets the in

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Hassan Mohamed, Tarek, Hussein Abubakr, Mahmoud M. Hussein, and Gaber S. Salman. "Adaptive Load Frequency Control in Power Systems Using Optimization Techniques." In AI and Learning Systems - Industrial Applications and Future Directions. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.93398.

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At present, simple and classical tuned controllers are widely used in the power system load frequency control (LFC) application. Existing LFC system parameters are usually tuned based on experiences, classical methods, and trial and error approaches, and they are incapable of providing good dynamic performance over a wide range of operating conditions and various load scenarios. Therefore, the novel modeling and control approaches are strongly required, to obtain a new trade-off between efficiency and robustness. Thus, the proposed techniques in this chapter are referred to be an adaptive cont

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Bevrani, H., F. Habibi, and S. Shokoohi. "ANN-Based Self-Tuning Frequency Control Design for an Isolated Microgrid." In Meta-Heuristics Optimization Algorithms in Engineering, Business, Economics, and Finance. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2086-5.ch012.

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The increasing need for electrical energy, limited fossil fuel reserves, and the increasing concerns with environmental issues call for fast development in the area of distributed generations (DGs) and renewable energy sources (RESs). A Microgrid (MG) as one of the newest concepts in the power systems consists of several DGs and RESs that provides electrical and heat power for local loads. Increasing in number of MGs and nonlinearity/complexity due to entry of MGs to the power systems, classical and nonflexible control structures may not represent desirable performance over a wide range of ope

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Тези доповідей конференцій з теми "Wide operating frequency"

Sital, Prashantdeep Singh, Siddhesh Chavan, Komal Borse, et al. "Compact and Planar Sinuous Antenna operating in the Wide Band Frequency Range." In 2024 4th Asian Conference on Innovation in Technology (ASIANCON). IEEE, 2024. https://doi.org/10.1109/asiancon62057.2024.10838051.

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Winkler, Lisa, and Christian Nölleke. "Artificial neural networks for laser frequency stabilization." In CLEO: Science and Innovations. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.sw3h.4.

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We present a machine learning approach to automatic frequency locking of lasers based on artificial neural networks. We show that this method reliably identifies the target line under a wide range of operating conditions.

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Chang-Chien, Le-Ren, Tran Quoc Trung, and Truong Dinh Minh Duc. "Seamless Electro-mechanical Frequency Response Control of Wind Turbine Generator Across a Wide Rotor Speed Operating Range." In 2025 IEEE Industry Applications Society Annual Meeting (IAS). IEEE, 2025. https://doi.org/10.1109/ias62731.2025.11061498.

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Liu, Hao, Xia Sheng, Tianyang Zhao, et al. "Demonstration of 12.3-THz Wide-Bandwidth Tunable CFP2 Coherent Transceiver Operating at C6T+L6T Band." In Optical Fiber Communication Conference. Optica Publishing Group, 2025. https://doi.org/10.1364/ofc.2025.m4c.2.

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We present a 130GBaud-based CFP2-DCO with nominal frequency tuning range from 184.35THz to 196.65THz. Experiment results show that the laser output is greater than 16.5dBm, and the maximum BtB OSNR tolerance in 400Gbit/s DP-QPSK is 16.79dB.

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Yeo, Hyeonsoo, Jeffrey Jr., C. Acree, and Andrew Kreshock. "Comparison of CAMRAD II and RCAS Predictions of Tiltrotor Aeroelastic Stability." In Vertical Flight Society 73rd Annual Forum & Technology Display. The Vertical Flight Society, 2017. http://dx.doi.org/10.4050/f-0073-2017-12052.

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Tiltrotor whirl flutter in cruise flight is investigated using comprehensive rotorcraft analysis codes CAMRAD II and RCAS. A generic tiltrotor model with a 3-bladed gimballed rotor was systematically developed starting with a simple rigid rotor mounted on a rigid pylon and a more sophisticated model was built up by adding one design variable at a time. The rotor is also coupled with a flexible wing/pylon modeled from NASTRAN for aeroelastic stability analysis. The effects of pitch-flap coupling (δ₃), blade elasticity, precone, undersling, yoke chord and flap stiffness, pitch link stiffness, ro

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Subhash, J. T. G., A. Joseph, and A. K. Unnikrishnan. "Harmonics extraction of nonlinear load operating in wide frequency variation." In 2012 IEEE International Conference on Industrial Technology (ICIT 2012). IEEE, 2012. http://dx.doi.org/10.1109/icit.2012.6209981.

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Bunsanit, C., P. Uthansakul, R. Wongsan, and M. Uthansakul. "Low profile multi-beam former operating in wide frequency band." In 2009 6th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON). IEEE, 2009. http://dx.doi.org/10.1109/ecticon.2009.5137161.

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Chen, Aixin, and Keqi Zhao. "Fixed-frequency beam-steerable leaky-wave antenna operating over a wide band." In 2017 International Symposium on Antennas and Propagation (ISAP). IEEE, 2017. http://dx.doi.org/10.1109/isanp.2017.8228939.

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Inam, Wardah, David J. Perreault, and Khurram K. Afridi. "Variable frequency multiplier technique for high efficiency conversion over a wide operating range." In 2014 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2014. http://dx.doi.org/10.1109/ecce.2014.6953868.

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Rudrapati, Sivaramakrishna, Akash Mukherjee, Girish Tiwari, and Shalabh Gupta. "A Wide Operating Range Seamlessly Tunable mmWave LC-QVCO with Selective Frequency Mode." In 2018 IEEE MTT-S International Microwave and RF Conference (IMaRC). IEEE, 2018. http://dx.doi.org/10.1109/imarc.2018.8877127.

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Звіти організацій з теми "Wide operating frequency"

Unknown, Author. L51630 In-Line Detection and Sizing of Stress Corrosion Cracks Using EMAT Ultrasonics. Pipeline Research Council International, Inc. (PRCI), 1990. http://dx.doi.org/10.55274/r0010616.

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The development of stress corrosion cracks (SCC) in buried gas pipelineshas posed a serious threat to pipeline integrity for many years. It can be reliably detected by magnetic particle techniques in the field or by laboratory studies using low frequency eddy currents. It is also possible to find and measure the depths of the cracks from the ID by careful scanning with an ultra-sonic angle beam probe but the transducer must be manipulated by a skilled operator. All of these approaches are not very satisfactory for in-line inspections because they are not suitable for covering the total area of

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Ahmad, Noshin S., Raul Pineda-Mendez, Fahad Alqahtani, Mario Romero, Jose Thomaz, and Andrew P. Tarko. Effective Design and Operation of Pedestrian Crossings. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317438.

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Pedestrians are vulnerable road users since they are prone to more severe injuries in any vehicular collision. While innovative solutions promise improved pedestrian safety, a careful analysis of local conditions is required before selecting proper corrective measures. This research study had two focuses: (1) methodology to identify roads and areas in Indiana where the frequency and severity of pedestrian collisions are heightened above the acceptable level, and (2) selecting effective countermeasures to mitigate or eliminate safety-critical conditions. Two general methods of identifying speci

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Turmena, Lucas, Flávia Guerra, Altiere Freitas, et al. TUC Urban Lab Profile: Alliance for the Centre of Recife, Brazil. United Nations University - Institute for Environment and Human Security (UNU-EHS), 2024. http://dx.doi.org/10.53324/hcyv7857.

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After almost two years in operation, the challenges and key achievements of the TUC Urban Lab established in Comunidade do Pilar in Recife, Brazil, provide valuable lessons for sustaining ongoing activities, accelerating broader transformations and guiding similar efforts elsewhere: 1. DEVELOPING A PLACE-BASED APPROACH AND BUILDING MUTUAL TRUST: Meaningful participation is contingent upon establishing and maintaining trust between UL facilitators and participants. In the case of Comunidade do Pilar, overcoming initial distrust and skepticism required tailoring UL activities to residents’ needs

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Seginer, Ido, Louis D. Albright, and Robert W. Langhans. On-line Fault Detection and Diagnosis for Greenhouse Environmental Control. United States Department of Agriculture, 2001. http://dx.doi.org/10.32747/2001.7575271.bard.

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Background Early detection and identification of faulty greenhouse operation is essential, if losses are to be minimized by taking immediate corrective actions. Automatic detection and identification would also free the greenhouse manager to tend to his other business. Original objectives The general objective was to develop a method, or methods, for the detection, identification and accommodation of faults in the greenhouse. More specific objectives were as follows: 1. Develop accurate systems models, which will enable the detection of small deviations from normal behavior (of sensors, contro

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Vargas-Herrera, Hernando, Juan Jose Ospina-Tejeiro, Carlos Alfonso Huertas-Campos, et al. Monetary Policy Report - April de 2021. Banco de la República de Colombia, 2021. http://dx.doi.org/10.32468/inf-pol-mont-eng.tr2-2021.

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1.1 Macroeconomic summary Economic recovery has consistently outperformed the technical staff’s expectations following a steep decline in activity in the second quarter of 2020. At the same time, total and core inflation rates have fallen and remain at low levels, suggesting that a significant element of the reactivation of Colombia’s economy has been related to recovery in potential GDP. This would support the technical staff’s diagnosis of weak aggregate demand and ample excess capacity. The most recently available data on 2020 growth suggests a contraction in economic activity of 6.8%, lowe

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