Статті в журналах: "AGD tuning"

1

Abdel-Magid, Y. L., and M. M. Dawoud. "Optimal AGC tuning with genetic algorithms." Electric Power Systems Research 38, no. 3 (September 1996): 231–38. http://dx.doi.org/10.1016/s0378-7796(96)01091-7.

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2

Arauz, Teresa, José M. Maestre, Xin Tian, and Guanghua Guan. "Design of PI Controllers for Irrigation Canals Based on Linear Matrix Inequalities." Water 12, no. 3 (March 18, 2020): 855. http://dx.doi.org/10.3390/w12030855.

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A new Proportional-Integral (PI) tuning method based on Linear Matrix Inequalities (LMIs) is presented. In particular, an LMI-based optimal control problem is solved to obtain a sparse feedback that provides the PI tuning. The ASCE Test Canal 1 is used as a case study. Using a linearised model of the canal, different tunings for the design of the PI controller are developed and tested using the software Sobek. Furthermore, the proposed method is also compared with other tunings proposed for the same canal available in the literature. Our results show that the proposed method reduces by half the maximum errors with respect to other assessed alternatives and minimizes undesired mutual interactions between canal pools. Also, our method improves the optimality degree of the PI tuning by 30%. Therefore, it is concluded that the LMI based PI controllers lead to satisfactory performance in regulating water levels and canal flows/structure outflows, outperforming other tested alternatives, thus becoming a useful tool for irrigation canal control.

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3

Ji, Ya Feng, Dian Hua Zhang, Jie Sun, and Xu Li. "Smith Prediction Monitor AGC System Based on CPSO Self-Tuning Pi Control." Advanced Materials Research 753-755 (August 2013): 2602–6. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.2602.

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In accordance with the feature of pure delay in monitor AGC system for hot rolling mill, a new self-tuning PI Smith prediction controller based on chaotic particle swarm optimization (CPSO) is developed. The algorithmic principle and design method of new controller are given. Based on the typical monitor AGC model of tandem hot mill, the analysis of dynamic performance for traditional PI Smith prediction controller and CPSO self-tuning PI Smith prediction controller is done by MATLAB. The simulation results indicate that CPSO self-tuning PI Smith prediction controller has faster response and higher static accuracy than traditional PI Smith prediction controller.

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4

Zhang, Zijian, Yuanzhen Li, Chi Wang, Su Xu, Zuojia Wang, Erping Li, Hongsheng Chen, and Fei Gao. "Dispersion-tunable photonic topological waveguides." Applied Physics Letters 121, no. 1 (July 4, 2022): 011701. http://dx.doi.org/10.1063/5.0097422.

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Dispersion-tunable photonic topological waveguides have recently attracted much attention, due to their promising applications on topological devices with tunable operational frequencies. Since dispersions of topological waveguides traverse the whole bandgaps of bulk structures, tuning the dispersions (especially the bandwidths) requires changing the whole bulk of corresponding photonic topological insulators. A previously reported material-modification approach provided a parallel tuning on such numerous lattices; however, the increased material loss deteriorated transmissions of the topological waveguide. Here, a parallel tuning approach on structures is theoretically proposed and demonstrated, which spawns dispersion-tunable photonic topological waveguides without increasing material loss. Based on the bilayer honeycomb model, a topological valley waveguide by utilizing bilayer designer plasmonic structures is constructed, accomplished with dispersion tunings by altering interlayer distance. Experimental results validate the theoretical model and display a 61%-relative-tuning range of frequency, with a tunable relative bandwidth up to 16%. This approach may promise applications in tunable topological lasers, robust delay lines, and intelligent photonic devices.

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5

Lei, Yuechen, Zhi-Gang Hu, Min Wang, Yi-Meng Gao, Zhanchun Zuo, Xiulai Xu, and Bei-Bei Li. "Fully reconfigurable optomechanical add-drop filters." Applied Physics Letters 121, no. 18 (October 31, 2022): 181110. http://dx.doi.org/10.1063/5.0114020.

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Fully reconfigurable add-drop filters (ADFs) have important applications in optical communication and information processing. Here, we demonstrate a broadly tunable add-drop filter based on a double-disk cavity optomechanical system, side-coupled with a pair of tapered fiber waveguides. We investigate the dependence of the through (drop) efficiency on coupling rates between the cavity and two waveguides by varying cavity-waveguide distances. By optimizing the cavity-waveguide coupling rates, a drop efficiency of 89% and a transmission of 1.9% have been achieved. Furthermore, tuning of the ADF is realized by changing the air gap of the double disk using a fiber tip, which is controlled by a piezoelectric nanostage. Benefiting from the large optomechanical coupling coefficient and the mechanical compliance of the double-disk microcavity, a tuning range of 8 nm has been realized using a voltage of 7 V on the piezoelectric nanostage, which is more than one free spectral range of the cavity. As a result, both the through and drop signals can be resonant with any wavelength within the transparent window of the cavity material, which indicates that the ADF is fully reconfigurable.

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6

Al-Din Abed, Wisam Najm, Omar A. Imran та Ibrahim S. Fatah. "Аutѳmаtіϲ generаtіѳn cѳntrol bаѕẹԁ wһale орtimіzatіѳn αlgorithm". International Journal of Electrical and Computer Engineering (IJECE) 9, № 6 (1 грудня 2019): 4516. http://dx.doi.org/10.11591/ijece.v9i6.pp4516-4523.

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In the designing and operation of interconnected power systems, automatic-generation-control (AGC) represent an important topic. AGC is responsible for maintaining the balance between generation side and load side via controlling the frequency and active power interchange. A new metaheuristic strategy is proposed in this work for optimal controller tuning in AGC system. Ԝһale Орtimіzatіоn Αlgorithm(WOA) is proposed for optimal tuning of reset integral controller. T he proposed strategy is used for optimal AGC in two-areas interconnected-power system. The proposed tuning strategy is compared with other new metaheuristic optimization strategy termed as Harmony Search (HS). The two-area interconnected power system are simulated based MATLAB-toolbox. From results obtained, it is obvious that, the system transient and steady-state behavior are enhanced greatly under the same conditions. This is due to the use of the proposed optimization technique. The proposed technique has an advanced and superior feature like, local optimum avoiding, fast convergence ability, and lower search agents and iteration are required. All mentioned features, make this strategy optimal for various optimization problems.

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7

Hancock, Linda. "Fine‐tuning Livingstone and Adams' ethical principles for integrity in gambling research." Addiction 111, no. 1 (December 16, 2015): 13–15. http://dx.doi.org/10.1111/add.13086.

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8

Sheikh, M. R. I., R. Takahashi, and J. Tamura. "Robust Stabilizing Controllers to Automatic Generation Control for Load Frequency Control Application." Journal of Scientific Research 2, no. 2 (April 26, 2010): 285–93. http://dx.doi.org/10.3329/jsr.v2i2.3063.

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Since superconducting magnetic energy storage (SMES) unit with a self-commutated converter is capable of controlling both the active and reactive powers simultaneously and quickly, increasing attention has been focused recently on power system stabilization by SMES control. This study presents the effects of novel control strategies of self-tuned fuzzy proportional integral (FPI) controller and fuzzy frequency (FF) controller associated with the automatic generation control (AGC) including SMES unit. The effects of the self-tuning configuration with FPI controller in AGC is also compared with that of FF controlled AGC on SMES control. The simulation results show that both self tuning control schemes of AGC are very effective in damping out of the oscillations caused by load disturbances and it is also seen that the FF controlled AGC with SMES perform better primary frequency control compared to FPI controlled AGC with SMES. Keywords: Load frequency control; Single area power system; FPI controller; FF controller; SMES unit. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i2.3063 J. Sci. Res. 2 (2), 285-293 (2010)

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9

Javidan, Javad, and Ali Ghasemi. "A Novel Fuzzy RPID Controller for Multiarea AGC with IABC Optimization." Journal of Engineering 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/510572.

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An Interactive Artificial Bee Colony (IABC) Optimization based fuzzy (IABCF) to tune optimal gains of a Robust Proportional Integral Derivative (RPID) controller is proposed for the solution of multiarea automatic generation control (AGC) simulation problem in a restructured power system. One of the important problems in the proposed method is the exact tuning of the RPID parameters for achieving the desired level of robust performance. The problem of robustly tuning of RPID based AGC design is formulated as an optimization problem according to the time domain-based objective function, which is solved by the IABC technique that has a strong ability to find the most optimistic results. The robustness and effectiveness of the proffered method are shown on a two and four areas deregulated power system with possible contracted scenarios under large load demand and area disturbances in comparison with the other methods through FD and ITAE performance indices. The evaluation results show that the proposed control strategy achieves good robust performance for worldwide experience of automatic generation control in restructured systems parameters and load changes in the presence of system nonlinearities.

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10

S.N, Kavitha. "Tuning SQL Queries for Better Performance." International Journal of Psychosocial Rehabilitation 24, no. 5 (May 25, 2020): 7002–5. http://dx.doi.org/10.37200/ijpr/v24i5/pr2020703.

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11

Hua, Guanghui, Chun Wang, Ladier Fa, and Linjun Shi. "Controller parameters tuning of PV Based on PSASP/UD by AGA." IOP Conference Series: Earth and Environmental Science 384 (November 29, 2019): 012054. http://dx.doi.org/10.1088/1755-1315/384/1/012054.

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12

Malhotra, Urvi, and Ramakrishna Gokaraju. "An Add-On Self-Tuning Control System for a UPFC Application." IEEE Transactions on Industrial Electronics 61, no. 5 (May 2014): 2378–88. http://dx.doi.org/10.1109/tie.2013.2272272.

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13

Kong, Hui, Jintian Bian, Jiyong Yao, Qing Ye, and Xiaoquan Sun. "Temperature tuning of BaGa4Se7 optical parametric oscillator." Chinese Optics Letters 19, no. 2 (2021): 021901. http://dx.doi.org/10.3788/col202119.021901.

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14

S, Rout, and Panda K. "AGC Tuning of an Inter-Connected Power System after Deregulation Using PSO." IJIREEICE 3, no. 8 (August 15, 2015): 44–48. http://dx.doi.org/10.17148/ijireeice.2015.3810.

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15

Sun, Jie, Dian-hua Zhang, Xu Li, Jin Zhang, and De-shun Du. "Smith prediction monitor AGC system based on fuzzy self-tuning PID control." Journal of Iron and Steel Research International 17, no. 2 (February 2010): 22–26. http://dx.doi.org/10.1016/s1006-706x(10)60053-2.

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16

Mishra, Somanath. "Optimal Tuning of 3DOF-PID and 2DOF-PID Controller for Load Frequency Control." Journal of Advanced Research in Dynamical and Control Systems 24, no. 4 (March 31, 2020): 61–68. http://dx.doi.org/10.5373/jardcs/v12i4/20201418.

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17

R., Dr Nafeena. "Design and Online Re-tuning of Power System Stabilizers Using Phasor Measurement Unit." Journal of Advanced Research in Dynamical and Control Systems 12, SP4 (March 31, 2020): 1147–55. http://dx.doi.org/10.5373/jardcs/v12sp4/20201588.

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18

Sharkey, John. "Fascia and living tensegrity considerations in: lower extremity and pelvic entrapment neuropathies." International Journal of Anatomy and Research 9, no. 1.2 (February 20, 2021): 7881–85. http://dx.doi.org/10.16965/ijar.2020.254.

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Peripheral neuropathies can have a plethora of origins including physical insults resulting from connective tissue compression and entrapment. Observational investigations, using biotensegrity focused dissections, have identified site-specific fascial structures that are hypothesised to afford integrity to neurovascular structures by providing appropriate tension and compression. These myofascial structures act as site-specific fascia tuning pegs. While these ‘tuning pegs’ are capable of having a whole body impact, this paper will look specifically at the local influences on pelvis and lower limb. The analogy of a fascia ‘tuning peg’, similar to the tuning peg of a string instrument, is adopted to help explain this unfamiliar concept. An ‘out of tune’ fascial system would lead to hypertonic and inhibited tissues, dissonant notes, one could say. Hypertonic tissues increase tensional forces acting within local and global networks leading to inappropriate densification of fascial structures, fibrosis and neurovascular fascial adhesions. Inhibited tissues, unable to generate sufficient force to ensure appropriate fascial integrity, lead to excessive compression on neurovascular structures like a dissonant note striking a wrong cord. Site-specific fascia tuning pegs provide appropriate frequency and note specific tension and compression ensuring combined forces operate in an omnidirectional manner resulting in pain free physiology, neurology and motion. The role of muscles in metabolism, physiology, heat production and motion is well described within the scientific literature. Less understood is the local role of myofascial structures providing mechanotransductive forces resulting in fascial expansive responses ensuring appropriate gliding and decompression of neurovascular structures. It is proposed that failure of site-specific fascia tuning pegs results in excessive compression, friction, inflammation, pathology, pain and changes in sensations. KEY WORDS: Biotensegrity, Fascia, Site specific fascia tuning pegs, Tensegrity, Neuropathy, Dynamic ischemia.

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19

Almamoori, Nawres Ali, Bogdan Dziadak, and Ahmad H. Sabry. "Design of a closed-loop autotune PID controller for three-phase for power factor corrector with Vienna rectifier." Bulletin of Electrical Engineering and Informatics 11, no. 4 (August 1, 2022): 1798–806. http://dx.doi.org/10.11591/eei.v11i4.3728.

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A closed-loop auto-tuner proportional integral derivative (PID) controller for tuning the DC-link voltage, voltage neutral controllers, and DQ axis current for a power factor corrector with Vienna rectifier is developed and discussed in this study. In traditional tuning of these control loops, it is needed to tune one loop at a time manually, which tends to be a difficult and time-consuming process. In this work, we add a closed-loop PID auto-tuner in the control design will help to simplify and speed up this process by tuning all the 4 PID controllers in a single simulation running in a closed loop. Essentially, it runs auto-tuning experiments for the DQ axis -current, output voltage, and neutral point voltage loops by injecting perturbations; recording the output; estimating the plant frequency response, and tuning the PI controller parameters. In DQ-axis control, projections are used to convert time-based3-phase currents into a time invariant 2-coordinate vector. The results after adding the auto-tuner show that the response time improved considerably when the balanced load was introduced with the individual loads being connected. The results show that the neutral point voltage controller did a good job of keeping the voltage neutral point stable compared to the older controller gains.

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20

Kim, Hee, Thomas Ganslandt, Thomas Miethke, Michael Neumaier, and Maximilian Kittel. "Deep Learning Frameworks for Rapid Gram Stain Image Data Interpretation: Protocol for a Retrospective Data Analysis." JMIR Research Protocols 9, no. 7 (July 13, 2020): e16843. http://dx.doi.org/10.2196/16843.

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Background In recent years, remarkable progress has been made in deep learning technology and successful use cases have been introduced in the medical domain. However, not many studies have considered high-performance computing to fully appreciate the capability of deep learning technology. Objective This paper aims to design a solution to accelerate an automated Gram stain image interpretation by means of a deep learning framework without additional hardware resources. Methods We will apply and evaluate 3 methodologies, namely fine-tuning, an integer arithmetic–only framework, and hyperparameter tuning. Results The choice of pretrained models and the ideal setting for layer tuning and hyperparameter tuning will be determined. These results will provide an empirical yet reproducible guideline for those who consider a rapid deep learning solution for Gram stain image interpretation. The results are planned to be announced in the first quarter of 2021. Conclusions Making a balanced decision between modeling performance and computational performance is the key for a successful deep learning solution. Otherwise, highly accurate but slow deep learning solutions can add value to routine care. International Registered Report Identifier (IRRID) DERR1-10.2196/16843

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21

de Aguiar, Douglas Oliveira Morais, Maziyar Milanizadeh, Emanuele Guglielmi, Francesco Zanetto, Giorgio Ferrari, Marco Sampietro, Francesco Morichetti, and Andrea Melloni. "Automatic Tuning of Silicon Photonics Microring Filter Array for Hitless Reconfigurable Add–Drop." Journal of Lightwave Technology 37, no. 16 (August 15, 2019): 3939–47. http://dx.doi.org/10.1109/jlt.2019.2916473.

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22

Xu, Yao, Fangxing Li, Zhiqiang Jin, and Maryam Hassani Variani. "Dynamic Gain-Tuning Control (DGTC) Approach for AGC With Effects of Wind Power." IEEE Transactions on Power Systems 31, no. 5 (September 2016): 3339–48. http://dx.doi.org/10.1109/tpwrs.2015.2489562.

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23

Lukasse, L. J. S., K. J. Keesman, A. Klapwijk, and G. van Straten. "A comparison of NH4/NO3 control strategies for alternating activated sludge processes." Water Science and Technology 39, no. 4 (February 1, 1999): 93–102. http://dx.doi.org/10.2166/wst.1999.0194.

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Four control strategies for N-removal in alternating activated sludge plants (ASP's) are compared: 1. timer-based, 2. switching the aeration on/off when depletion of nitrate/ammonium is detected, 3. switching the aeration on/off when ammonium crosses an upper/lower-bound, 4. the newly developed adaptive receding horizon optimal controller (ARHOC) as presented in Lukasse et al. (1997). The comparison is made by simulating the controllers' application to an alternating continuously-mixed activated sludge reactor preceded by a small anoxic reactor for predenitrification. The biological processes in the reactors are modelled by the activated sludge model no. 1. Realistic influent patterns, measured at a full-scale wastewater treatment plant, are used. The results show that three totally different controllers (timer-based, NH4-bounds based and ARHOC) can achieve a more or less equal effluent quality, if tuned optimally. The difference mainly occurs in the sensitivity to suboptimal tunings. The timer-based strategy has a higher aeration demand. The sensitivity of the ARHOC controller to sub-optimal tuning, known measurement time delays and changing plant loads is significantly less than that of the other controllers. Also its tuning is more natural and explicit.

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24

Liu Xianlin, 刘先琳, 郭军强 Guo Junqiang, 胡亚 Hu Ya, 廖令琴 Liao Lingqin, 陈全伟 Chen Quanwei, 卢启景 Lu Qijing, 吴翔 Wu Xiang та 谢树森 Xie Shusen. "欧姆热调谐光学微泡谐振腔光频梳研究". Acta Optica Sinica 41, № 16 (2021): 1614002. http://dx.doi.org/10.3788/aos202141.1614002.

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25

Singh, Preetjot, Walter Lasecki, Paulo Barelli, and Jeffrey Bigham. "HiveMind: Tuning Crowd Response with a Single Value." Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 1 (November 3, 2013): 66–67. http://dx.doi.org/10.1609/hcomp.v1i1.13130.

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One common problem plaguing crowdsourcing tasks is tuning the set of worker responses: Depending on task requirements, requesters may want a large set of rich and varied worker responses (typically in subjective evaluation tasks) or a more convergent response-set (typically for more objective tasks such as fact-checking). This problem is especially salient in tasks that combine workers’ responses to present a single output: Divergence in these settings could either add richness and complexity to the unified answer, or noise. In this paper we present HiveMind, a system of methods that allow requesters to tune different levels of convergence in worker participation for different tasks simply by adjusting the value of one variable.

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26

Sharkey, John. "SITE-SPECIFIC FASCIA TUNING PEGS AND PLACES OF PERILOUS PASSAGE MYOFASCIAL CONSIDERATIONS IN UPPER EXTREMITY ENTRAPMENT NEUROPATHIES: A CLINICAL ANATOMISTS VIEW." International Journal of Anatomy and Research 8, no. 4.2 (December 5, 2020): 7823–28. http://dx.doi.org/10.16965/ijar.2020.237.

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The objective of this study was to identify common anatomical locations of densified fascia associated with axillary, musculocutaneous, median, ulnar and radial nerve entrapment. Additionally, a proposal concerning a tensegrity based expansive decompressive protective role of muscles and ligaments as ‘site-specific fascia tuning pegs’ is offered for consideration. This observational report provides a means to stimulate research into the dynamics of force transfer via tensegral mechanotransductive pathways possibly decompressing neurovascular structures. Morphological changes to fascia profunda, septal tissues, epineurium, perineurium and endomysial tissue in continuity with neural structures were noted. Entrapment neuropathies involving the upper extremity are a growing and widespread phenomenon within modern society. Upper extremity neuropathies affect dentists, athletes (professional and recreational), pianists, grocery store employees, office workers, cab drivers and a host of other professional and non-professional individuals. Neurovascular insults can develop at multiple sites referred to by anatomists as the three P’s [i.e. Places of Perilous Passage]. The complexity of the inter-communicating nerve network, known as the brachial plexus, is well described as are the referred pain patterns of the contributing terminal branches. Sensory innervation to the upper extremity includes most of the axilla while excluding a specific region of the medial upper extremity and axilla which is supplied by the intercostobrachial nerve [i.e. T2]. This observational study identified specific anatomical locations where increased fascial densification lead to reduced gliding of the various facial laminae due to densified, fibrotic or adhered fascial tissues. A new hypothesis emerged concerning “site-specific fascia tuning pegs” described as biological instruments [i.e. muscle fibers and ligaments] that modify the length and width of the various specialist neural and vascular tubes [i.e. epineurium, tunica adventitia]. This author hopes that providing this information will assist in improving diagnosis, treatment and prognosis of upper extremity neurovascular insults that result in pain or unpleasant changes in sensation. KEY WORDS: Neuropathy, Fascia, Entrapment, Brachial Plexus, Tensegrity, Densification, Fibrotic, Site-Specific Fascia Tuning Pegs.

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McInerney, Daniel J. "Tuning the discipline of history in the United States: Harmony (and dissonance) in teaching and learning." Arts and Humanities in Higher Education 16, no. 4 (January 4, 2017): 337–57. http://dx.doi.org/10.1177/1474022216686523.

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Tuning's progress in the discipline of history in the United States since 2009 illustrates the project's continuing capacity to develop “educational structures and programmes on the basis of diversity and autonomy”, maintaining the initiative's original European Union commitment in a markedly different academic environment across the Atlantic. Struggling initially against a backdrop of confusion, hesitancy, and resistance among US faculty, Tuning has been adopted by a steadily expanding number of educators in individual institutions, state systems, and the history discipline's premier professional society. Though operating, at times, in an uneven, imprecise, or pro forma manner, Tuning in the US manages to address several important goals: bringing a more coherent frame of reference to scattered conversations about higher education; framing a more meaningful discussion about the knowledge, skills, and non-monetized “value” developed through higher education; focusing on the central role of faculty discipline experts in the work of assessment, accreditation, and accountability; and engaging professional scholarly societies on questions of teaching and learning.

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Beddow, Helen M., Diederik Liebrand, Douglas S. Wilson, Frits J. Hilgen, Appy Sluijs, Bridget S. Wade, and Lucas J. Lourens. "Astronomical tunings of the Oligocene–Miocene transition from Pacific Ocean Site U1334 and implications for the carbon cycle." Climate of the Past 14, no. 3 (March 5, 2018): 255–70. http://dx.doi.org/10.5194/cp-14-255-2018.

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Abstract. Astronomical tuning of sediment sequences requires both unambiguous cycle pattern recognition in climate proxy records and astronomical solutions, as well as independent information about the phase relationship between these two. Here we present two different astronomically tuned age models for the Oligocene–Miocene transition (OMT) from Integrated Ocean Drilling Program Site U1334 (equatorial Pacific Ocean) to assess the effect tuning has on astronomically calibrated ages and the geologic timescale. These alternative age models (roughly from ∼ 22 to ∼ 24 Ma) are based on different tunings between proxy records and eccentricity: the first age model is based on an aligning CaCO3 weight (wt%) to Earth's orbital eccentricity, and the second age model is based on a direct age calibration of benthic foraminiferal stable carbon isotope ratios (δ13C) to eccentricity. To independently test which tuned age model and associated tuning assumptions are in best agreement with independent ages based on tectonic plate-pair spreading rates, we assign the tuned ages to magnetostratigraphic reversals identified in deep-marine magnetic anomaly profiles. Subsequently, we compute tectonic plate-pair spreading rates based on the tuned ages. The resultant alternative spreading-rate histories indicate that the CaCO3 tuned age model is most consistent with a conservative assumption of constant, or linearly changing, spreading rates. The CaCO3 tuned age model thus provides robust ages and durations for polarity chrons C6Bn.1n–C7n.1r, which are not based on astronomical tuning in the latest iteration of the geologic timescale. Furthermore, it provides independent evidence that the relatively large (several 10 000 years) time lags documented in the benthic foraminiferal isotope records relative to orbital eccentricity constitute a real feature of the Oligocene–Miocene climate system and carbon cycle. The age constraints from Site U1334 thus indicate that the delayed responses of the Oligocene–Miocene climate–cryosphere system and (marine) carbon cycle resulted from highly non-linear feedbacks to astronomical forcing.

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Rukerandanga, Filston, Stephen Musyoki, and Edwin O. Ataro. "Design and Analysis of Ultralow Voltage Graphene on the Silicon Rich Nitride Tunable Ring Resonator-Based Add-Drop Filter for DWDM Systems." International Journal of Optics 2022 (December 9, 2022): 1–13. http://dx.doi.org/10.1155/2022/4182037.

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We propose and simulate a third-order 3D electro-optically highly tunable compact add-drop filter based on nonlinear microring resonators. The used tuning mechanism relies on enhanced Kerr nonlinearity in a graphene layer integrated on top of a two-photonabsorption-free and low loss silicon-rich nitride core material at telecommunication wavelengths. An ultrahigh tuning efficiency (150 pm/V) over a tuning range of 1.3 nm, ensuring ultralow voltage consumption, was achieved in this work. We used titanium oxide and silicon oxide as the upper-cladding and under-cladding materials, respectively, around the silicon-rich nitride core material, to come up with a polarization-insensitive, and the thermally resilient third-orderadd-drop optical filter in the L band (1565 nm–1625 nm) with a full wave at a half maximum bandwidth of 50 GHz (linewidth of 0.4 nm) around 1570 nm, a high-free spectral range of 18.5 nm, a quality factor of 2580, an extinction ratio of 60 dB, a finesse of 19, and a thermal stability of 0.3 pm/K. A three-dimensional multiphysics approach was used to simulate the propagation of transverse electric and transverse magnetic polarized waves through the filter, combining the electromagnetic features with thermo-optic and stress-optical effects. The contribution of this work to the existing literature is that the designed filter proposes a new and highly tunable material system compatible with the complementary metal-oxide-semiconductor fabrication technology while combining high tunability, polarization insensitivity, and high thermal stability features for an ultracompact and energy-efficienton-chip integrated photonic tunable filter for dense wavelength division multiplexing systems in the less occupied L band.

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Jha, Debesh, and Goo-Rak Kwon. "Alzheimer's Disease Detection Using Sparse Autoencoder, Scale Conjugate Gradient and Softmax Output Layer with Fine Tuning." International Journal of Machine Learning and Computing 7, no. 1 (February 2017): 13–17. http://dx.doi.org/10.18178/ijmlc.2017.7.1.612.

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31

Xiaoli Li, Xiaoli Li. "Multiwavelength visible laser based on the stimulated Raman scattering effect and beta barium borate angle tuning." Chinese Optics Letters 14, no. 2 (2016): 021404–21407. http://dx.doi.org/10.3788/col201614.021404.

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32

Anderson, Melinda C., Kathryn H. Arehart, and Pamela E. Souza. "Survey of Current Practice in the Fitting and Fine-Tuning of Common Signal-Processing Features in Hearing Aids for Adults." Journal of the American Academy of Audiology 29, no. 02 (February 2018): 118–24. http://dx.doi.org/10.3766/jaaa.16107.

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AbstractCurrent guidelines for adult hearing aid fittings recommend the use of a prescriptive fitting rationale with real-ear verification that considers the audiogram for the determination of frequency-specific gain and ratios for wide dynamic range compression. However, the guidelines lack recommendations for how other common signal-processing features (e.g., noise reduction, frequency lowering, directional microphones) should be considered during the provision of hearing aid fittings and fine-tunings for adult patients.The purpose of this survey was to identify how audiologists make clinical decisions regarding common signal-processing features for hearing aid provision in adults.An online survey was sent to audiologists across the United States. The 22 survey questions addressed four primary topics including demographics of the responding audiologists, factors affecting selection of hearing aid devices, the approaches used in the fitting of signal-processing features, and the strategies used in the fine-tuning of these features.A total of 251 audiologists who provide hearing aid fittings to adults completed the electronically distributed survey. The respondents worked in a variety of settings including private practice, physician offices, university clinics, and hospitals/medical centers.Data analysis was based on a qualitative analysis of the question responses. The survey results for each of the four topic areas (demographics, device selection, hearing aid fitting, and hearing aid fine-tuning) are summarized descriptively.Survey responses indicate that audiologists vary in the procedures they use in fitting and fine-tuning based on the specific feature, such that the approaches used for the fitting of frequency-specific gain differ from other types of features (i.e., compression time constants, frequency lowering parameters, noise reduction strength, directional microphones, feedback management). Audiologists commonly rely on prescriptive fitting formulas and probe microphone measures for the fitting of frequency-specific gain and rely on manufacturers’ default settings and recommendations for both the initial fitting and the fine-tuning of signal-processing features other than frequency-specific gain.The survey results are consistent with a lack of published protocols and guidelines for fitting and adjusting signal-processing features beyond frequency-specific gain. To streamline current practice, a transparent evidence-based tool that enables clinicians to prescribe the setting of other features from individual patient characteristics would be desirable.

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33

Yang, Liang, Yan Su, An Ping Qiu, Qin Shi, Xin Hua Zhu, and Rui Feng. "Analysis and Design of Drive Closed-Loop for MEMS Vibratory Gyroscope." Advanced Materials Research 159 (December 2010): 406–11. http://dx.doi.org/10.4028/www.scientific.net/amr.159.406.

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The principle of drive closed-loop for tuning fork comb MEMS vibratory gyroscope is analyzed. The core of the closed-loop is to keep the vibration speed stable by adding driving force offset the damping force. The closed-loop with a single Automatic Gain Control (AGC) loop is chosen to maintain the vibration speed stable, and then the closed-loop with AGC is analyzed to obtain its transfer function. The transfer function simplifies the nonlinear AGC system to a linear system which is easy analyzed its parameters impacting the system. The values of two important parameters of AGC were chosen via simulation. The whole closed-loop system was simulated in SIMULINK. The circuit is built and tested in accordance with the theory of analysis and simulation. Experimental results demonstrate that the stability of the amplitude of vibration speed is 90ppm; and that of the frequency of vibration speed is 114ppm.

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34

Whittall, Richard John. "Tuning means for tuning stringed instruments, a guitar comprising tuning means and a method of tuning stringed instruments." Journal of the Acoustical Society of America 113, no. 1 (2003): 24. http://dx.doi.org/10.1121/1.1554212.

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35

Moussallem, Chady, Magali Allain, Frédéric Gohier, and Pierre Frère. "Preponderant role of pentafluorophenyl moieties for tuning the electronic properties of extended benzodifuran-azomethine derivatives." New Journal of Chemistry 45, no. 19 (2021): 8647–53. http://dx.doi.org/10.1039/d1nj01132d.

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36

REN Shuai, 任帅, 庄炜 ZHUANG Wei, 董明利 DONG Mingli, 王永千 WANG Yongqian, 闫光 YAN Guang та 吴越 WU Yue. "调制光栅Y分支激光器波长准连续调谐方法". ACTA PHOTONICA SINICA 51, № 6 (2022): 0614001. http://dx.doi.org/10.3788/gzxb20225106.0614001.

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37

Zheng Donghui, 郑东晖, 陈磊 Chen Lei, 马致遥 Ma Zhiyao, 李金鹏 Li Jinpeng та 胡晨辉 Hu Chenhui. "Φ600 mm波长调谐干涉仪的振动误差抑制算法". Acta Optica Sinica 42, № 23 (2022): 2312005. http://dx.doi.org/10.3788/aos202242.2312005.

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38

Oleiwi, Ahmed Oday, and Ahmed Jasim Sultan. "AGC Including ELD and Emission Coordination Using Sine Cosine Algorithm." Journal of Techniques 3, no. 3 (September 29, 2021): 44–56. http://dx.doi.org/10.51173/jt.v3i3.356.

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The aim of conventional AGC is to regulate the demand load of the area with taking into account the sharing power with the others area and also the frequency deviation and tie-line power deviation within minimum error steady-state. The proposed coordination's goal is to regulate the demand load between the interconnected area when taking into account the optimal dispatch and emission effect. The two-area that be consist of three units in each one (hydro, thermal, and gas) is used of proposed system. The optimization algorithms were used to find the best operating point of the system by tuning the integral gain are located in ACE that named primary control and Generation allocation logic named secondary controller. The Particle Swarm Optimization (PSO) and Sine Cosine Algorithm (SCA) are used to tune gains of the integral (I) controller to show the superiority in identifying robust controller. The simulation results prove that the SCA with proposed coordination is very effectiveness as compared with PSO algorithm in enhance the dynamic performance and reduce overshoot, maximum frequency deviation, and net tie line power flow deviation error for a given load change and disturbed the demand load between two-area as economic.

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39

Yuan, Xiao Dong, Yong Chun Xie, and Jian Hui Hua. "Research on PID Control of Electro-Hydraulic Position Servo Control System Based on SDO Optimization." Advanced Materials Research 926-930 (May 2014): 1396–99. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.1396.

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Abstract. This article introduces the electro-hydraulic position servo control system, establishes its mathematical model and simulates with Simulink, then add PID module, use the empirical method to tune proportional, integral and differential parameters, it is found that adjustment is tedious, and performance improvement is limited. Then use the SDO tools for automatic optimization of PID control parameters, obtained a better simulation results. This tuning method is simple, easy to use, and with good results.

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40

Kajiwara, Tomoyuki, Biwa Miura, and Yuki Arase. "Monolingual Transfer Learning via Bilingual Translators for Style-Sensitive Paraphrase Generation." Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 05 (April 3, 2020): 8042–49. http://dx.doi.org/10.1609/aaai.v34i05.6314.

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We tackle the low-resource problem in style transfer by employing transfer learning that utilizes abundantly available raw corpora. Our method consists of two steps: pre-training learns to generate a semantically equivalent sentence with an input assured grammaticality, and fine-tuning learns to add a desired style. Pre-training has two options, auto-encoding and machine translation based methods. Pre-training based on AutoEncoder is a simple way to learn these from a raw corpus. If machine translators are available, the model can learn more diverse paraphrasing via roundtrip translation. After these, fine-tuning achieves high-quality paraphrase generation even in situations where only 1k sentence pairs of the parallel corpus for style transfer is available. Experimental results of formality style transfer indicated the effectiveness of both pre-training methods and the method based on roundtrip translation achieves state-of-the-art performance.

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41

Cheng, Chi Cheng, Lan Yuan Hsu, Yuan Liang Hsu, and Po Tsang Chen. "Simulation and Analysis of Feedforward Automatic Gauge Control for a Hot Strip Finishing Mill." Advanced Materials Research 230-232 (May 2011): 471–75. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.471.

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In order to fully understand dynamic behavior of the thickness variation and conduct off-line process tuning, a dynamic simulator for the feedforward Automatic Gauge Control (AGC) for a hot strip finishing mill in China Steel Corporation is developed. One of the major factors influencing on deviation of delivery thickness of the steel strip is the temperature variation caused by cyclic contact between the steel strip and beams, which transfer the strip in the hot rolling process. This temperature difference brings about hardness variation along the strip, which is known as skid marks. Simulation results and system analysis verify that the feedforward AGC system is capable of overcoming the high frequency thickness variation disturbed by the cyclic temperature difference, which usually cannot be effectively compensated by regular gaugemeter AGC feedback loop. A strategy to locate the optimal feedforward gain is also proposed.

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42

Anagnostou, Katerina, George Veisakis, Ioannis Kalogerakis, George Viskadouros, Konstantinos Rogdakis, and Emmanuel Kymakis. "Geometric Tuning for Enhanced Moisture-Driven Electricity Generation Enabled by Graphene-Oxide Flakes." Coatings 12, no. 12 (December 15, 2022): 1970. http://dx.doi.org/10.3390/coatings12121970.

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In this work, we formulate water-based graphene oxide (GO) inks to fabricate moisture energy generators (MEGs) while a two-fold geometric tuning is proposed to encourage enhanced performance. Two GO-based structures with distinctly different thicknesses were prepared as the moisture absorbing layer: a GO-pellet (GOP) and a thinner GO-film (GOF). The effect of electrical contacts’ configuration on the MEG’s output voltage (Vo) was evaluated as a second geometric tunning approach by varying the surface area of the contacts and their orientation with respect to the GO plane, i.e., horizontal or vertical. GOF-based devices that employed a horizontal contacts’ configuration demonstrated champion Vo values (~350 mV) and the fastest response to humidity (3 min required to reach maximum Vo when the relative humidity, or RH, was increased). In GOP devices with horizontal point-like contacts, Vo is inversely related to the contacts’ distance, with a maximum Vo of ~205 mV achieved at a ~1 mm contacts’ distance. GOP-based MEGs with point-like contacts placed vertically to the GO-plane yielded a higher Vo value (~285 mV), while the humidity response time was 15 min. Replacing these contacts with large area electrodes in GOP devices resulted in devices with a slower response to humidity (~30 min) due to a smaller exposed GO surface area. These geometric tuning techniques allowed for the investigation of the optimum device configuration towards efficient moisture-based energy generation with a fast response.

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43

Melek Tezcan, Melek Tezcan, Huseyin Cicek Huseyin Cicek, and Meryem Cicek and Said Nadeem Meryem Cicek and Said Nadeem. "Tuning Photocatalytic Activity and Decomposition Properties of Poly(Polyethylene Glycol Diacrylate-co-Hydroxyethyl Methacrylate)/TiO2 Composite Hydrogel." Journal of the chemical society of pakistan 41, no. 4 (2019): 598. http://dx.doi.org/10.52568/000778/jcsp/41.04.2019.

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We have synthesized TiO2-loaded porous polyethylene glycol diacrylate-co-hydroxyethyl methacrylate (poly(PEGDA-co-HEMA)) hydrogel composites having tunable photocatalytic properties with structural decomposition. TiO2 was loaded over hydrogels by impregnation of titanium oxobutyrate (Ti(OBu)4), peptized at room temperature that resulted poly(PEGDA-co-HEMA)/TiO2 composites. Pore morphology, crystalline structure and TiO2 content of the hydrogels/composites were examined using SEM, XRD and TGA analyses. Structural decomposition rate of the composite hydrogels and model contaminant (methyl orange) was performed under simulated sun light. Suitable pore size, morphology and higher PEGDA/HEMA ratio in the formulation increased the structural decomposition rate of the polymer that works as a TiO2 template. As the template breaks out, it leaves behind a porous TiO2 skeleton – thus accelerates the photocatalytic activity. Although the TiO2 template did not formed at lower PEGDA/HEMA ratio and lower molecular weight of PEGDA, decomposition rate of the composite slowed down (10 % in 108 h). The prepared hydrogels can be used in the skin care andamp; engineering and waste water treatments.

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44

Rukerandanga, Filston, Stephen Musyoki, and Edwin Ataro. "Ultra-Low Power All-Optically Tuned Hybrid Graphene Ultra Silicon-Rich Nitride Ring Resonator-Based Add-Drop Filter for DWDM Systems." Optics 3, no. 3 (August 31, 2022): 287–303. http://dx.doi.org/10.3390/opt3030027.

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This research work conducted a design and simulation of an ultra-low power all-optically tuned nonlinear ring resonator-based add-drop filter. The purpose of this study is to investigate a CMOS-compatible nonlinear material system for an optical filter with temperature resilience, polarization insensitivity, and fast and energy-efficient tunability. The all-optical tunability was achieved using an optical pump that photo-excites the high nonlinear Kerr effect in the device material system. A three-dimensional multiphysics approach was used, combining the electromagnetics and thermo-structural effects in the filter. Hybrid graphene on an ultra-rich silicon nitride ring resonator-based filter enabled the realization of an ultra-high tuning efficiency (0.275 nm/mW for TE mode and 0.253 nm/mW for TM mode) on a range of 1.55 nm and thermal stability of 0.11 pm/K. This work contributed to the existing literature by proposing (1) the integration of a high Kerr effect layer on a low loss, high index contrast, and two-photon absorption-free core material with an athermal cladding material system and (2) the use of a cross-section shape insensitive to polarization. Moreover, the tuning mechanism contributed to the realization of an all-optical on-chip integrable filter for Dense Wavelength Division Multiplexing systems in the less occupied L band.

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45

Wang, Xuetong, Xudong Zheng, Haibin Wu, Yaojie Shen, Guowen Liu, Zhonghe Jin, and Zhipeng Ma. "Comparative analysis and tests for an improved frequency tuning area-varying electrode considering the influence of fringe capacitance." Journal of Micromechanics and Microengineering 32, no. 4 (March 7, 2022): 045003. http://dx.doi.org/10.1088/1361-6439/ac57af.

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Abstract In this paper, an improved area-varying tuning electrode with better immunility to fringe capactor is proposed, analyzed and tested, which is mainly used for frequency tuning of micromechanical gyroscopes. Based on the existing area-varying tuning electrode Hu et al (2013 J. Microelectromech. Syst. 22 909–18), this paper firstly analyzes the capacitance of the tuning electrode, and obtains the relationship between the capacitance and the displacement using both the analytic formula and finite element analysis, verifying that the fringe capacitance in area-varying tuning electrode decreases the tuning ability of both up-tuning electrode and down-tuning electrode. Then, parametric scanning method is used to optimize the geometry parameter of the tuning electrode, which reduces the influence of fringe capacitance and increases the tuning ability of the tuning electrode. Contrast experiments and tests are carried with gyroscope samples with tuning electrodes before and after optimizing. The tested mean value of tuning ability of the improved tuning electrode is improved by 95.7% after opimization.

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46

Amann, Markus. "Tuning triumph." Nature Photonics 2, no. 3 (March 2008): 134–35. http://dx.doi.org/10.1038/nphoton.2008.15.

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47

Caruth, John. "Tuning key." Journal of the Acoustical Society of America 83, no. 1 (January 1988): 406. http://dx.doi.org/10.1121/1.396218.

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48

Biagioni, Cristian, Carmen Capalbo, and Marco Pasero. "Nomenclature tunings in the hollandite supergroup." European Journal of Mineralogy 25, no. 1 (February 11, 2013): 85–90. http://dx.doi.org/10.1127/0935-1221/2013/0025-2255.

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49

Guo, Kechen, Yulie Wu, Yongmeng Zhang, Jiangkun Sun, Dingbang Xiao, and Xuezhong Wu. "Damping Asymmetry Trimming Based on the Resistance Heat Dissipation for Coriolis Vibratory Gyroscope in Whole-Angle Mode." Micromachines 11, no. 10 (October 19, 2020): 945. http://dx.doi.org/10.3390/mi11100945.

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Damping asymmetry is one of the most important factors that determines the performance of Coriolis Vibratory Gyroscope. In this paper, a novel damping tuning method for the resonator with parallel plate capacitors is presented. This damping tuning method is based on resistance heat dissipation and the tuning effect is characterized by the control force in Whole-Angle mode. As the damping tuning and stiffness tuning in the resonator with parallel plate capacitors are coupled with each other, a corresponding tuning system is designed. To verify the tuning effects, experiments are conducted on a hemispherical resonator gyroscope with Whole-Angle mode. The damping tuning theories is demonstrated by the testing results and 87% of the damping asymmetry is reduced by this tuning method with a cost of 3% decaying time. Furthermore, the angle-dependent drift in rate measurement after tuning is only 15.6% of the one without tuning and the scale factor nonlinearity decreases from 5.49 ppm to 2.66 ppm. The method can be further applied on the damping tuning in other resonators with symmetrical structure.

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50

Wyżga, Paweł, Igor Veremchuk, Ulrich Burkhardt, Paul Simon, Yuri Grin, and Krzysztof Wojciechowski. "Thermal Stability and Tuning of Thermoelectric Properties of Ag1−xSb1+xTe2+x (0 ≤ x ≤ 0.4) Alloys." Applied Sciences 8, no. 1 (January 4, 2018): 52. http://dx.doi.org/10.3390/app8010052.

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