Design and simulation of a tunable frequency OTA -C Chebyshev filter by JIANG Jin-guang, WANG Yao-nan

“…A new transconductor operational amplifier（OTA） using active resistor of source degeneration was presented.The method was developed through acting differential pair degenerated by two MOSFET operating in the triode region as active resistor in its input stage,the circuit was designed in working in stable quiescent operating point with folded cas-cade output stage using voltage common-mode feedback（CMFB） circuit.As an tunable cutoff frequency fourth order Chebyshev lowpass filter,an accurately tunable Gm of OTA was used,which employed switching capacitor technique to tune Gm value.Simulated results show that the practical frequency response of the filter is very near to that of idealized prototype by applying 2-poly 4-metal 3.3V power supply 0.35μm CMOS technology spice model.…”
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Historical Reconstruction of Astronaut Cancer Risk: Context for Recent Solar Minima by Tony C. Slaba

“…To provide additional context for this level of variation, two different nuclear interaction models are used within the radiation transport algorithms used to propagate GCR ions and secondary particles through shielding and tissue. It is shown that switching the nuclear interaction model also introduces 10% difference, on average, in projected risks over all historical minima. …”
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Enhanced PI Control Based SHC-PWM Strategy for Active Power Filters by Irati Ibanez-Hidalgo, Rodrigo H. Cuzmar, Alain Sanchez-Ruiz, Angel Perez-Basante, Asier Zubizarreta, Salvador Ceballos, Ricardo P. Aguilera

“…Low-switching frequency modulation techniques, such as selective harmonic control-pulsewidth modulation (SHC-PWM), have been recently proposed for high-power medium-voltage active power filter (APF) application. …”
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Bearing Fault Signal Analysis Based on an Adaptive Multiscale Combined Morphological Filter by Chun Lv, Peilin Zhang, Dinghai Wu, Bing Li, Yunqiang Zhang

“…Both simulation and experimental results show that the adaptive multiscale combined morphological filter can remove noise more thoroughly and retain details of the fault signal better than the dual-tree complex wavelet filter, traditional morphological filter, adaptive singular value decomposition method (ASVD), and improved switching Kalman filter (ISKF). …”
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An Acceleration Denoising Method Based on an Adaptive Kalman Filter for Trajectory in Merging Zones by Qiucheng Chen, Shunying Zhu, Jingan Wu, Hongguang Chang, Hong Wang

“…In merging zones, vehicles tend to accelerate and decelerate frequently, leading to poor denoising performance of the linear Kalman filter (KF). To address this issue, this study proposes a new denoising method based on the adaptive Kalman filter, which automatically switches between KF and Unscented KF to accommodate car-following and merging behaviours, respectively. …”
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On-chip power efficient MHz to GHz tunable Brillouin microwave photonic filters by Reena Parihar, Choon Kong Lai, Ziqian Zhang, Duk-Yong Choi, Stephen J. Madden, Benjamin J. Eggleton, Amol Choudhary, Moritz Merklein

“…Furthermore, the filter exhibits frequency tuning capabilities ranging from 10 to 40 GHz (X to Ka-band) and can be configured from single- to multi-bandpass filter responses and switched from bandpass to bandstop.…”
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Dual-Converter Active Power Filter with Reduced Dynamic Losses: Control Synthesis and Modelin by A. V. Belousov, Y. V. Skuriatin, N. A. Denysevich

“…It is shown that the organization of the operating mode of converters with different conversion frequencies and rated capacities can significantly reduce the dynamic losses in the switches of active power filters.…”
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Deployment and evaluation of an NH₄⁺∕ H₃O⁺ reagent ion switching chemical ionization mass spectrometer for the detection of reduc... by C. L. Zang, M. D. Willis

“…We report a method for characterizing and filtering periods of hysteresis following each reagent ion switch and compare use of reagent ions, persistent ambient ions, and a deuterated internal standard for diagnosing this hysteresis. …”
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Thermally tunable add-drop filter based on valley photonic crystals for optical communications by Sun Lu, Li Xingfeng, Hu Pan, Wang Hongwei, Zhang Yong, Tang Guojing, He Xintao, Dong Jianwen, Su Yikai

“…However, there are few studies on how to achieve power-efficient tunable devices based on VPCs, which are essential for implementing basic functions such as optical switching and routing. Here, we propose and experimentally demonstrate a thermally tunable add-drop filter (ADF) based on VPCs operating at telecommunication wavelengths. …”
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Miniaturized Filters with a Controllable Number of Passbands by Embedding Serpentine Microstrip Resonators in SIW by Xiaohei Yan, Wenjing Mu, Minjie Guo

“…These resonators are composed of upper and lower parts, which form a single-passband filter when the lengths are equal and a double-passband filter when the lengths are unequal. …”
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Current Control and Active Damping for Single Phase LCL-Filtered Grid Connected Inverter by Mohammad Alshiekh, Alaa Marouf, Muhieddin Kubeitari

“…LCL filter has been widely used in the grid connected inverter, since it is effective in attenuation of the switching frequency harmonics in the inverter. …”
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Financial Inclusion and Access to Higher Education An Empirical Study of Selected Districts in Eastern Uganda by Eton, Marus, Sammy, Godfrey Poro, Denis, Sekiwu, Fabian, Mwosi, Francis Akena, Adyanga

“…The research brought out the relationship between financial inclusion and access to higher education. Descriptive survey research design was adopted and the findings established that digital financing eases making deposits in banks, transacting via mobile money and switching from one bank to the other. …”
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Research on Optimal Control Method of Tennis Racket String Diameter Based on Kalman Filter Algorithm by Xin Chen

“…When the Kalman filter uses the optimal gain (the Kalman filter enters the steady state), the corresponding cost function is established based on the noncorrelated nature of its residual sequence, which is used as the judgment condition for the sampling strategy switch to improve the stability of the system. …”
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Model Predictive Current Control with Asymmetric Stacked Multilevel Inverter and LCL-Filter Based STATCOM by Mostafa Q. Kasim, Raaed Faleh Hassan

“…One of the essential features of this inverter that distinguishes it from the conventional types is that it achieves the required voltage levels with fewer switching devices, leading to simplifying the control process. …”
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Switchable Terahertz Band-Pass/Band-Stop Filter Enabled by Hybrid Vanadium Dioxide Metamaterial by Ying Chen, Jianwei Cheng, Chaowu Liang

“…Here, a hybrid vanadium dioxide (VO2) metamaterial was designed with switchable properties of band-pass filter and band-stop filter in the frequency range of 0.3–1.6 THz. …”
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Robust H-Infinity Filter and PSO-SVM Based Monitoring of Power Quality Disturbances System by Prakash K. Ray, Harish Kumar Sahoo, Asit Mohanty, Javed Khan Bhutto, Abdulwasa Bakr Barnawi, Abdulmjeed Ali Alshaya

“…Specifically, the focus is on PQ disturbances caused as a result of load switching and variations in environmental factors, such as changes in solar irradiation and wind speed. …”
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Discrete or distributed delay? Effects on stability of population growth by Edoardo Beretta, Dimitri Breda

“…The growth of a population subject to maturation delay is modeled by using either a discrete delay or a delay continuously distributed over the population. …”
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Self‐compensation of DC–DC converters under peak current mode control by A. El Aroudi, K. Mandal, D. Giaouris, S. Banerjee

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A High Performance Adaptive Digital LDO Regulator With Dithering and Dynamic Frequency Scaling for IoT Applications by Muhammad Asif, Imran Ali, Danial Khan, Muhammad Riaz Ur Rehman, Qurat- Ul-Ain, Muhammad Basim, Young Gun Pu, Minjae Lee, Keum Cheol Hwang, Youngoo Yang, Kang-Yoon Lee

“…A dithering technique is introduced to eliminate the limit cycle oscillation (LCO) and improve the performance of the regulator. …”
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Moving Target Localization in Sports Image Sequence Based on Optimized Particle Filter Hybrid Tracking Algorithm by Yan Guo

“…Then, aiming at the problem that the poorly diversified particles cannot be better integrated and localized, a self-optimized particle filter algorithm is proposed. …”
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