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Journal articles on the topic 'Loop correction'

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Author: Grafiati

Published: 14 March 2023

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1

Trifonovs-Bogdanovs, Pjotrs, Anastasia Zhiravetska, Tatjana Trifonova-Bogdanova, and Konstantin Mamay. "Structural Correction of Inertial System Circuit." Transport and Aerospace Engineering 4, no. 1 (August 1, 2017): 46–52. http://dx.doi.org/10.1515/tae-2017-0006.

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Abstract Inertial system errors in case of using the new structural correction method have been determined. Inertial system errors, which determine the kinematic parameters of aircraft movement, are finally generated in the computing circuit. This is the part of inertial system structure which is presented as a closed loop with a feedback. The forward circuit of the main loop consists of several velocity and distance integrators connected in series. Accelerometer signal corrections are calculated in the feedback loop. New corrective circuits have been introduced to the inertial system structure. And the errors of the changed system have been determined. The structural corrective circuits got signals from exterior onboard navigation systems. The conducted research has shown that the use of structural corrective circuits in some cases leads to a considerable decrease of inertial system errors. It means that the new structural method of inertial system correction provides positive results. Further research of inertial system errors should be conducted for the case of its full structure.

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2

Kristiano, Jason, and Jun'ichi Yokoyama. "Perturbative region on non-Gaussian parameter space in single-field inflation." Journal of Cosmology and Astroparticle Physics 2022, no. 07 (July 1, 2022): 007. http://dx.doi.org/10.1088/1475-7516/2022/07/007.

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Abstract We calculate one-loop correction to the two-point functions of curvature perturbation in single-field inflation generated by cubic self-interaction. Incorporating the observed red-tilted spectrum of curvature perturbation, the relevant one-loop correction takes a finite value and inversely proportional to the spectral tilt. Requiring one-loop correction to be much smaller than the tree-level contribution leads to an upper bound on primordial non-Gaussianity. While observationally allowed region of non-Gaussian parameter space is found to be entirely included by the region, where one-loop correction is smaller than the tree-level contribution, an appreciably large region has one-loop correction larger than 1% or even 10% of the latter. If future observations conclude non-Gaussianity falls in such a region, then it would be important to incorporate higher-order corrections to the spectrum in order to achieve precise cosmology. In some extreme cases, where one-loop correction has a comparable magnitude to the tree-level contribution, it might indicate breakdown of the cosmological perturbation theory in the context of single-field inflation.

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3

Zhu, Rong-Fei, Tai-Fu Feng, and Hai-Bin Zhang. "The QCD corrections of the process h → ηbZ." Modern Physics Letters A 33, no. 15 (May 20, 2018): 1830008. http://dx.doi.org/10.1142/s0217732318300082.

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We investigate the 125 GeV Higgs boson decay to a pseudoscalar quarkonium [Formula: see text] and [Formula: see text] boson. We calculate the quantum chromodynamics (QCD) one-loop corrections to the branching ratio of the process, [Formula: see text], both in the Standard Model (SM) and in the two Higgs double models (THDM). Adding the QCD one-loop corrections, the branching ratio of [Formula: see text] in the SM is [Formula: see text]. The relative correction of that QCD one-loop level relative to the tree level of [Formula: see text] is around 76% in the SM. Similarly, the relative correction in the THDM also can be around 75%. The key parameter, [Formula: see text], can affect the relative correction in the THDM.

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4

FAZIO, A. R., and G. K. SAVVIDY. "TWO-LOOP WORLDSHEET EFFECTIVE ACTION." Modern Physics Letters A 18, no. 39 (December 21, 2003): 2817–28. http://dx.doi.org/10.1142/s0217732303012246.

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We are studying quantum corrections in the earlier proposed string theory based on worldsheet action which measures the linear sizes of the surfaces. At classical level the string tension is equal to zero and as it was demonstrated in the previous studies one loop correction to the classical worldsheet action generates Nambu–Goto area term, that is nonzero string tension. We extend this analysis computing the worldsheet effective action in the second order of the loop expansion. We are studying quantum corrections in the earlier proposed string theory based on worldsheet action which measures the perimeter of the surface. At the classical level the string tension is equal to zero and we demonstrate that one and two-loop corrections to the classical worldsheet action generates Nambu–Goto area term, that is nonzero string tension.

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5

Das, C. R., Katri Huitu, and Timo J. Kärkkäinen. "The Higgs Trilinear Coupling and the Scale of New Physics for the SM-Axion-Seesaw-Higgs Portal Inflation (SMASH) Model." Universe 9, no. 1 (January 9, 2023): 43. http://dx.doi.org/10.3390/universe9010043.

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In the extended scalar sector of the SMASH (Standard Model - Axion-Seesaw-Higgs portal inflation) framework, we conduct a phenomenological investigation of the observable effects. In a suitable region of the SMASH scalar parameter spaces, we solve the vacuum metastability problem and discuss the one-loop correction to the triple Higgs coupling, λHHH. The λHHH and SM Higgs quartic coupling λH corrections are found to be proportional to the threshold correction. A large λHHH correction (≳5%) implies vacuum instability in the model and thus limits the general class of theories that use threshold correction. We performed a full two-loop renormalization group analysis of the SMASH model. The SMASH framework has also been used to estimate the evolution of lepton asymmetry in the universe.

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6

Leng, Jian Wei, and Xiao Hui Qi. "Study on Linearity Correction Scheme for VCO Tuning Characteristics." Applied Mechanics and Materials 130-134 (October 2011): 4178–84. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.4178.

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The linearity correction scheme for VCO tuning characteristics is the key to determine the performance of FMCW radar system. The paper introduces the basic definition of VCO tuning linearity. The linearity correction scheme for VCO tuning characteristics mainly inclues three basic schemes, they are the reactance compensation, open loop and closed loop linearity correction scheme. Analyzing the basic principle of every correction scheme detailedly, and doing a key analysis of the closed loop digital correction scheme; Discussing their advantages and disadvantages, and introducing the latest research progress of VCO linearity correction schemes in detail.

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7

KIM, HYOJOONG, NAKWOO KIM, and JUNG HUN LEE. "ONE-LOOP CORRECTION TO ENERGY OF SPINNING STRINGS IN AdS5×T1, 1." Modern Physics Letters A 27, no. 03 (January 30, 2012): 1250015. http://dx.doi.org/10.1142/s0217732312500150.

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We consider circular spinning string solutions in AdS5×T1, 1 and calculate the quantum corrections to the energy at one-loop on worldsheet. The fluctuations are given as a set of harmonic oscillators and we calculate their normal mode frequency in closed form. The sum of frequency is equal to the one-loop string energy, which through AdS/CFT correspondence corresponds to the leading order correction of the conformal dimension for long operators in Klebanov–Witten conifold gauge field theory.

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8

Hou, Wei-Shu, and Hsien-chung Kao. "loop correction with charge singlet quarks." Physics Letters B 387, no. 3 (October 1996): 544–50. http://dx.doi.org/10.1016/0370-2693(96)01074-x.

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9

Furtado, J. S. N., and G. R. Silva. "One-loop nonlinear correction for QED." Modern Physics Letters A 31, no. 27 (August 28, 2016): 1650153. http://dx.doi.org/10.1142/s0217732316501534.

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In this work, we study the generation of a nonlinear correction for QED, namely, the Euler–Heisenberg effective action. In order to achieve this, we consider two methods. The first method employed consists in make use of Feynman parametrization to solve the integrals properly, while in the second method a derivative expansion in the external momentum was considered.

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10

KATO, AKINA, TAKUYA MOROZUMI, NORIMI YOKOZAKI, and SYN KYU KANG. "LOW ENERGY EFFECTIVE LAGRANGIAN FOR SUPERSYMMETRIC SEESAW MODEL." International Journal of Modern Physics E 16, no. 05 (June 2007): 1437–43. http://dx.doi.org/10.1142/s0218301307006794.

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Seesaw model is an attractive model because it may explain baryogenesis through leptogenesis and also may explain the small neutrino mass. The supersymmetric seesaw model may be more attractive because the naturalness problem is absent in supersymmetric theory. Recently, the higgs mass correction due to leptons and sleptons loops is computed.1 In this talk, we report on the preliminary results on the one loop corrections of leptons and sleptons loops to the effective action of Higgs sector for super symmetric seesaw model. Our results show that the corrections to the mass parameters for Higgs sector are proportional to the soft breaking parameters of supersymmetric seesaw model, while for the quartic couplings of Higgs fields, the corrections are suppressed by inverse powers of the right-handed neutrino mass.

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11

ABE, M., and N. SAKAI. "STRING-LOOP CORRECTION TO CALABI-YAU COMPACTIFICATION." Modern Physics Letters A 04, no. 03 (February 1989): 243–50. http://dx.doi.org/10.1142/s0217732389000319.

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String loop (torus) effect on the Calabi-Yau solutions is examined. In spite of different kinematical structure of one-loop effective Lagrangian, the loop-corrected solution still has vanishing first Chern class though it is not Ricci-flat. This shows the perturbative stability of the Calabi-Yau solution even including one-loop (torus) effects.

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12

Shelton, John, and Sittampalam Rajendra. "Minimally Invasive Correction of Prolapsed, Gangrenous Distal Limb of Loop Ileostomy to End-Loop Stoma." Case Reports in Surgery 2020 (November 6, 2020): 1–3. http://dx.doi.org/10.1155/2020/8873388.

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Introduction. Prolapse can be a complication of loop stomas. A prolapsed stoma which cannot be reduced or complicated with strangulation needs surgical correction. This case report describes a minimal access correction of a prolapsed gangrenous distal limb of ileostomy. Presentation of Case. A 67-year-old male patient was diagnosed with a lower rectal carcinoma, staged T3N1M0. Following neoadjuvant chemoradiation, he underwent a laparoscopic anterior resection with a defunctioning loop ileostomy. One month later, he presented with prolapse of the distal limb of the ileostomy. The limb was gangrenous and the gangrenous part was removed by using a linear GI stapler, and the loop ileostomy was converted to end-loop ileostomy. Discussion. It is a simple and technically feasible method for treating a prolapsed loop of the stoma. It is less invasive and has minimal postoperative complications. This technique reduces the duration of the hospital stay of the patient. Conclusion. Stapled assisted correction of prolapsed stoma avoids unnecessary laparotomy and aids in expedite recovery after surgery. It is beneficial for a surgeon to be familiar with the minimal access correction for stoma prolapse.

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13

IOFA, MIKHAIL Z. "N=2 SUPERSYMMETRY AND STRING-LOOP CORRECTED MAGNETIC BLACK HOLES." Modern Physics Letters A 17, no. 06 (February 28, 2002): 355–71. http://dx.doi.org/10.1142/s0217732302006540.

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We study string-loop corrections to magnetic black hole. Four-dimensional theory is obtained by compactification of the heterotic string theory on the manifold K3×T2 or on a suitable orbifold yielding N=1 supersymmetry in 6D. The resulting 4D theory has N=2 local supersymmetry. Prepotential of this theory receives only one-string-loop correction. The tree-level gauge couplings are proportional to the inverse effective string coupling and decrease at small distances from the center of magnetic black hole, so that loop corrections to the gauge couplings are important in this region. We solve the system of Killing spinor equations (conditions for the supersymmetry variations of the fermions to vanish) and Maxwell equations. At the string-tree level, we reproduce the magnetic black hole solution which can also be obtained by solving the system of the Einstein–Maxwell equations and the equations of motion for the moduli. String-loop corrections to the tree-level solution are calculated in the first order in string coupling. The resulting corrections to the metric and dilaton are large at small distances from the center of the black hole. Possible smearing of the singularity at the origin by quantum corrections is discussed.

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14

Brkić, Dejan, and Pavel Praks. "An Efficient Iterative Method for Looped Pipe Network Hydraulics Free of Flow-Corrections." Fluids 4, no. 2 (April 15, 2019): 73. http://dx.doi.org/10.3390/fluids4020073.

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The original and improved versions of the Hardy Cross iterative method with related modifications are today widely used for the calculation of fluid flow through conduits in loop-like distribution networks of pipes with known node fluid consumptions. Fluid in these networks is usually natural gas for distribution in municipalities, water in waterworks or hot water in district heating systems, air in ventilation systems in buildings and mines, etc. Since the resistances in these networks depend on flow, the problem is not linear like in electrical circuits, and an iterative procedure must be used. In both versions of the Hardy Cross method, in the original and in the improved one, the initial result of calculations in the iteration procedure is not flow, but rather a correction of flow. Unfortunately, these corrections should be added to or subtracted from flow calculated in the previous iteration according to complicated algebraic rules. Unlike the Hardy Cross method, which requires complicated formulas for flow corrections, the new Node-loop method does not need these corrections, as flow is computed directly. This is the main advantage of the new Node-loop method, as the number of iterations is the same as in the modified Hardy Cross method. Consequently, a complex algebraic scheme for the sign of the flow correction is avoided, while the final results remain accurate.

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15

LASHIN, E. I. "CP CONSERVED NONLEPTONIC K → πππ DECAYS IN THE CHIRAL QUARK MODEL." International Journal of Modern Physics A 21, no. 18 (July 20, 2006): 3699–726. http://dx.doi.org/10.1142/s0217751x06029405.

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The CP conserved nonleptonic K → πππ decays are discussed within the chiral quark model, including chiral perturbation theory corrections. For the chiral loop correction, they are presented in a way to be more manageable and easier for use. Furthermore a new identity for the imaginary part of the chiral loop corrections is derived. All amplitudes are parametrized in terms of quark and gluon condensate and the constituent quark mass. The same values for these parameters that can be obtained by a fit of the ΔI = 1/2 rule in K → 2π give a reasonably good fit in the K → 3π case. We compare with the work of other groups.

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16

Boughton, Charlotte K., and Roman Hovorka. "Correction to: New closed-loop insulin systems." Diabetologia 64, no. 6 (March 22, 2021): 1455. http://dx.doi.org/10.1007/s00125-021-05443-1.

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17

Vlaminck, Michiel, Hiep Luong, and Wilfried Philips. "Have I Seen This Place Before? A Fast and Robust Loop Detection and Correction Method for 3D Lidar SLAM." Sensors 19, no. 1 (December 21, 2018): 23. http://dx.doi.org/10.3390/s19010023.

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In this paper, we present a complete loop detection and correction system developed for data originating from lidar scanners. Regarding detection, we propose a combination of a global point cloud matcher with a novel registration algorithm to determine loop candidates in a highly effective way. The registration method can deal with point clouds that are largely deviating in orientation while improving the efficiency over existing techniques. In addition, we accelerated the computation of the global point cloud matcher by a factor of 2–4, exploiting the GPU to its maximum. Experiments demonstrated that our combined approach more reliably detects loops in lidar data compared to other point cloud matchers as it leads to better precision–recall trade-offs: for nearly 100% recall, we gain up to 7% in precision. Finally, we present a novel loop correction algorithm that leads to an improvement by a factor of 2 on the average and median pose error, while at the same time only requires a handful of seconds to complete.

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18

Wang, Huiliang, Jubo Li, Yang Gao, and Jianjun Yang. "Closed-Loop Feedback Flank Errors Correction of Topographic Modification of Helical Gears Based on Form Grinding." Mathematical Problems in Engineering 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/635156.

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To increase quality, reduce heavy-duty gear noise, and avoid edge contact in manufacturing helical gears, a closed-loop feedback correction method in topographic modification tooth flank is proposed based on the gear form grinding. Equations of grinding wheel profile and grinding wheel additional radial motion are derived according to tooth segmented profile modification and longitudinal modification. Combined with gear form grinding kinematics principles, the equations of motion for each axis of five-axis computer numerical control forming grinding machine are established. Such topographical modification is achieved in gear form grinding with on-machine measurement. Based on a sensitivity analysis of polynomial coefficients of axis motion and the topographic flank errors by on-machine measuring, the corrections are determined through an optimization process that targets minimization of the tooth flank errors. A numerical example of gear grinding, including on-machine measurement and closed-loop feedback correction completing process, is presented. The validity of this flank correction method is demonstrated for tooth flank errors that are reduced. The approach is useful to precision manufacturing of spiral bevel and hypoid gears, too.

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19

Kopietz, Peter. "Vertex Corrections in Gauge Theories for Two-dimensional Condensed Matter Systems." International Journal of Modern Physics B 12, no. 16n17 (July 10, 1998): 1673–92. http://dx.doi.org/10.1142/s0217979298000910.

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We calculate the self-energy of two-dimensional fermions that are coupled to transverse gauge fields, taking two-loop corrections into account. Given a bare gauge field propagator that diverges for small momentum transfers q as 1/qη, 1<η≤ 2, the fermionic self-energy without vertex corrections vanishes for small frequencies ω as Σ(ω)∝ ωγ with γ=2/(1+η)<1. We show that inclusion of the leading radiative correction to the fermion-gauge field vertex leads to Σ(ω)∝ωγ [1-aη ln (ω0/ω)], where aη is a positive numerical constant and ω0 is some finite energy scale. The negative logarithmic correction is consistent with the scenario that higher order vertex corrections push the exponent γ to larger values.

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20

Nefedov, Maxim, and Vladimir Saleev. "On the one-loop calculations with Reggeized quarks." Modern Physics Letters A 32, no. 40 (December 28, 2017): 1750207. http://dx.doi.org/10.1142/s0217732317502078.

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The technique of one-loop calculations for the processes involving Reggeized quarks is described in the framework of gauge invariant effective field theory for the Multi-Regge limit of QCD, which has been introduced by Lipatov and Vyazovsky. The rapidity divergences, associated with the terms enhanced by log(s), appear in the loop corrections in this formalism. The covariant procedure of regularization of rapidity divergences, preserving the gauge invariance of effective action is described. As an example application, the one-loop correction to the propagator of Reggeized quark and [Formula: see text]-scattering vertex are computed. Obtained results are used to construct the Regge limit of one-loop [Formula: see text] amplitude. The cancellation of rapidity divergences and consistency of the EFT prediction with the full QCD result is demonstrated. The rapidity renormalization group within the EFT is discussed.

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21

BICHL, A. A., J. M. GRIMSTRUP, L. POPP, M. SCHWEDA, and R. WULKENHAAR. "PERTURBATIVE ANALYSIS OF THE SEIBERG–WITTEN MAP." International Journal of Modern Physics A 17, no. 16 (June 30, 2002): 2219–31. http://dx.doi.org/10.1142/s0217751x02010649.

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We investigate the quantization of the θ-expanded noncommutative U(1) Yang–Mills action, obtained via the Seiberg–Witten map. The one-loop self-energy correction is gauge-independent. In a further paper, hep-th/0104097, we have shown that the loop correction may be renormalized via an unphysical field redefinition.

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22

Guo You-Ming, Ma Xiao-Yu, and Rao Chang-Hui. "Optimal closed-loop bandwidth of tip-tilt correction loop in adaptive optics system." Acta Physica Sinica 63, no. 6 (2014): 069502. http://dx.doi.org/10.7498/aps.63.069502.

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23

SPEAKMAN, Lee, Yasunori OWADA, and Kenichi MASE. "Looping in OLSRv2 in Mobile Ad-Hoc Networks, Loop Suppression and Loop Correction." IEICE Transactions on Communications E92-B, no. 4 (2009): 1210–21. http://dx.doi.org/10.1587/transcom.e92.b.1210.

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24

Mitrushenkov, A., L. Labzowsky, I. Lindgren, H. Persson, and S. Salomonson. "Second order loop after loop self-energy correction for few-electron multicharged ions." Physics Letters A 200, no. 1 (April 1995): 51–55. http://dx.doi.org/10.1016/0375-9601(95)00117-l.

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25

Fazlollahi, H. R. "Agegraphic dark energy cosmology and Quantum loop-correction." Physics of the Dark Universe 35 (March 2022): 100962. http://dx.doi.org/10.1016/j.dark.2022.100962.

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26

Yoo, C., C. Jeong, and J. Kih. "Open-loop full-digital duty cycle correction circuit." Electronics Letters 41, no. 11 (2005): 635. http://dx.doi.org/10.1049/el:20050776.

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27

Xiu, Rulin. "One-loop correction and the dilaton runaway problem." Physical Review D 55, no. 8 (April 15, 1997): 5075–82. http://dx.doi.org/10.1103/physrevd.55.5075.

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28

Cheevarunothai, Patikhom, Yinhai Wang, and Nancy L. Nihan. "Identification and Correction of Dual-Loop Sensitivity Problems." Transportation Research Record: Journal of the Transportation Research Board 1945, no. 1 (January 2006): 73–81. http://dx.doi.org/10.1177/0361198106194500110.

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29

Adkins, Gregory S., Richard N. Fell, and J. Sapirstein. "Two-Loop Correction to the Orthopositronium Decay Rate." Annals of Physics 295, no. 2 (February 2002): 136–93. http://dx.doi.org/10.1006/aphy.2001.6219.

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30

Antonov, D. V., and D. Ebert. "Curvature Expansion for the Gluodynamics String Including Perturbative Gluonic Contributions." Modern Physics Letters A 12, no. 27 (September 7, 1997): 2047–56. http://dx.doi.org/10.1142/s0217732397002090.

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Perturbation theory, which represents a Wilson loop in the SU(2) gluodynamics as an integral over all the orientations in color space, in the nonperturbative QCD vacuum and the non-Abelian Stokes theorem is applied to a derivation of the correction to the string effective action in the lowest order in the coupling constant g. This correction is due to the interaction of perturbative gluons with the string worldsheet and affects only the coupling constant of the rigidity term, while its contribution to the string tension of the Nambu–Goto term vanishes. The obtained correction to the rigidity coupling constant multiplicatively depends on the color "spin" of the representation of the Wilson loop under consideration and a certain path integral, which includes the background Wilson loop average.

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31

PERRY, ROBERT J., and MING LI. "CONVERGENCE OF DERIVATIVE AND INVERSE EFFECTIVE MASS EXPANSIONS FOR THE ONE LOOP EFFECTIVE ACTION." Modern Physics Letters A 02, no. 05 (May 1987): 353–58. http://dx.doi.org/10.1142/s021773238700046x.

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Numerical results for the one loop correction to (ϕ4)2 are compared to results obtained from a derivative expansion and an expansion in inverse powers of the effective mass. We vary the scalar background field to illustrate when and why these expansions succeed, and how they break down. It is shown that both expansions behave like asymptotic series, with the approximation improving until higher order corrections grow in magnitude.

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32

Jianqiang Ma, Jianqiang Ma, Kai Chen Kai Chen, Junjie Chen Junjie Chen, Baoqing Li Baoqing Li, and Jiaru Chu Jiaru Chu. "Closed-loop correction and ocular wavefronts compensation of a 62-element silicon unimorph deformable mirror." Chinese Optics Letters 13, no. 4 (2015): 042201–42204. http://dx.doi.org/10.3788/col201513.042201.

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33

Lu, Gui Ying, Yuan Sheng Wang, Bo Li, and Juan Yu. "Structure about the Dual-Axis Speed Turntable and its’ Stability Analysis." Applied Mechanics and Materials 235 (November 2012): 186–91. http://dx.doi.org/10.4028/www.scientific.net/amm.235.186.

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The structure and its function about a dual-axis rate turntable has been elaborated, its principle block diagram of control system is given. And its electromechanical system’s transfer function of the dual-axis rate table has been calculated and simplified reasonably based on experiments and practical situation, then a double loop control system constituted with a speed loop and a stabilization loop is got. Its’ correction link of the stabilization loop is calculated, which has a 2-order open loop transfer function. In order to achieve a suitable stability margin, the corresponding digital controller is designed, and its’ pulse transfer function response and the three-step iterative simulation results to a same sinusoidal excitation are got and compared, the same results verified the correctness of the design to the correction link.

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34

Chen, Long, Tairan Zhang, Tong Ben, and Peng Wei. "Accurate small major hysteresis loops calculation by the Preisach model with improved parametric distribution function." AIP Advances 12, no. 3 (March 1, 2022): 035337. http://dx.doi.org/10.1063/9.0000284.

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The inversed Preisach hysteresis model is widely used to realize the rapid coupling of hysteresis characteristics of core materials in finite element analysis. However, the small major hysteresis loop is difficult to be accurately simulated. In this paper, an improved inversed Preisach model based on an improved parametric distribution function is proposed. By analyzing the magnetic remanence, the waveform factor is coupled with the parametric distribution function, and the identification of the small major hysteresis loop is strengthened. The distribution function parameters can be found from the limit hysteresis loop through the optimization algorithm. In the numerical calculation process of the model, the amplitude correction coefficient in the discrete formula is extracted by the basic magnetization curve. Compared with the previous method, this method simulates the limit hysteresis loop well and has higher simulation accuracy for the small major hysteresis loops.

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35

Zhou, Yang, Ye Yan, Xu Huang, and Teng Yi. "Error Analysis of Closed-Loop Control for Spacecraft Orbital Transfer Using Monte Carlo Method." Advanced Materials Research 765-767 (September 2013): 1998–2003. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.1998.

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The true trajectory of spacecraft disperses from the nominal due to kinds of errors and perturbations, including environment, actuator and sensor uncertainties. This paper studies the error analysis problem of closed-loop control for spacecraft orbital transfer via Monte Carlo method. At first, errors that affect the true state are introduced and a navigation-target-correction loop system for Monte Carlo simulation is built. A dynamical model for orbital transfer is established, based on which both the extended Kalman filter (EKF) algorithm and correction maneuver control algorithm are developed. Precision analysis is studied of high eccentric orbital (HEO) transfer under open-loop and closed-loop control respectively. The simulation results prove the validity of the proposed method.

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36

Diessner, Philip, Jan Kalinowski, Wojciech Kotlarski, and Dominik Stöckinger. "Two-Loop Correction to the Higgs Boson Mass in the MRSSM." Advances in High Energy Physics 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/760729.

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We present the impact of two-loop corrections on the mass of the lightest Higgs boson in the minimalR-symmetric supersymmetric standard model (MRSSM). These shift the Higgs boson mass up by typically 5 GeV or more. The dominant corrections arise from strong interactions, and from the gluon and itsN=2superpartners, the sgluon and Dirac gluino, and these corrections further increase with large Dirac gluino mass. The two-loop contributions governed purely by Yukawa couplings and the MRSSMλ,Λparameters are smaller. We also update our earlier analysis which showed that the MRSSM can accommodate the measured Higgs andWboson masses. Including the two-loop corrections increases the parameter space where the theory prediction agrees with the measurement.

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CLAVELLI, L., P. ELMFORS, B. HARMS, B. S. SKAGERSTAM, and A. STERN. "THERMAL MASS SHIFTS IN OPEN SUPERSTRING MODELS." International Journal of Modern Physics A 05, no. 01 (January 10, 1990): 175–85. http://dx.doi.org/10.1142/s0217751x90000076.

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We investigate some thermodynamical properties of an open type I superstring model in six space-time dimensions. The model is free of tachyons at the tree level but acquires a tachyonic one-loop mass shift at zero-temperature. Even though the space-time supersymmetry is spontaneously broken, the asymptotic form of the fermionic and bosonic level densities are the same, i.e. there is a unique Hagedorn temperature TH. As expected, TH is a limiting temperature, i.e. the energy density of the string gas diverges at T=TH. The finite temperature one-loop correction to the mass of the scalar mesons, which are massless at three level, is calculated and is found to be finite for all temperatures. It is found that thermal corrections do not stabilize the zero-temperature one-loop tachyonic mass shift of the model.

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Limpaecher, Alex, Nicolas Feltman, Adrien Treuille, and Michael Cohen. "Real-Time Drawing Assistance through Crowdsourcing." Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 1 (November 3, 2013): 101–2. http://dx.doi.org/10.1609/hcomp.v1i1.13058.

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We propose a new method for the large-scale collection and analysis of drawings by using a mobile game specifically designed to collect such data. Analyzing this crowdsourced drawing database, we build a spatially varying model of artistic consensus at the stroke level. We then present a surprisingly simple stroke- correction method which uses our artistic consensus model to improve strokes in real-time. Importantly, our auto-corrections run interactively and appear nearly in- visible to the user while seamlessly preserving artistic intent. Closing the loop, the game itself serves as a plat- form for large-scale evaluation of the effectiveness of our stroke correction algorithm.

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Liu, Chengyu, Minxing Wang, Guanxing Yi, and Yi Zhuang. "A Study on the logarithm correction of black hole entropy." Journal of Physics: Conference Series 2083, no. 2 (November 1, 2021): 022042. http://dx.doi.org/10.1088/1742-6596/2083/2/022042.

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Abstract The logarithm correction of black hole entropy is important in understanding the essence of black hole entropy, providing a more accurate entropy calculation. We reviewed the mainstream method of logarithm correction of black hole entropy, including quantum loop gravity correction, conformal field theory correction, and classical thermal correction. Specifically, the correction of quantum loop gravity presents a stable general expression of logarithm correction, which only depends on the surface area of the black hole and solves the problem of meaningless entropy solution under a large length scale. Besides, the correction of the Cardy formula of conformal field theory is limited for the third term in depends on the mass of the black hole, which will finally lead to the unstable coefficient before the correction term. Finally, the correction deduced by the classical thermal method also gives a general expression of black hole entropy. In contrast, the entropy of BTZ black hole has a different coefficient before the logarithm term comparing to other kinds of the black hole. These results shed light for the research in general logarithm correction of black hole entropy, which is suitable for all kinds of black holes.

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FUJIMOTO, JUNPEI, and YOSHIMITSU SHIMIZU. "RADIATIVE CORRECTIONS TO $e^ + e^ - \to \bar tt$ IN ELECTROWEAK THEORY." Modern Physics Letters A 03, no. 06 (May 1988): 581–87. http://dx.doi.org/10.1142/s0217732388000696.

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The 0(α) radiative corrections to [Formula: see text] are calculated in the standard SU(2)×U(1) theory keeping the top quark mass. The contribution of the hard photon emission is included with suitable experimental cuts. We found that the 1-loop vertex diagrams for the top quark give rise to a fairly large correction in the order of 5% to the differential cross-section. Effects of the Higgs boson exchange are also discussed.

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Rahaman, Anisur. "Unparticle in (1+1) dimension with one-loop correction." Modern Physics Letters A 29, no. 14 (May 8, 2014): 1450072. http://dx.doi.org/10.1142/s0217732314500722.

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The possible emergence of unparticle has been mooted recently including a mass-like term for gauge field with the Schwinger model at the classical level. A one-loop correction due to bosonization is taken into account and investigation is carried out to study its effect on the unparticle scenario. It is observed that the physical mass, viz., unparticle scale acquires a new definition, i.e. the effect of this correction enters into the unparticle scale in a significant manner. The fermionic propagator is calculated which also agrees with the new scale. It has also been noticed that a novel restoration of the lost gauge invariance reappears when the ambiguity parameter related to the current anomaly acquires a specific expression. We have also observed that a quantum effect can nullify the effect of violation of gauge symmetry caused by some classical terms.

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Li, Li, Hong-jie Li, and Yan-jing Sun. "Improved Error Correction Methods for Filterless Digital Class D Audio Power Amplifier Based on FCLNF." Mathematical Problems in Engineering 2020 (August 12, 2020): 1–9. http://dx.doi.org/10.1155/2020/5914062.

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Aiming at correcting the error caused by the nonlinear and power supply noise of the bridge-tied-load (BTL) power stage of the filterless digital class D power amplifier, an error correction method was proposed based on feedforward power supply noise suppression (FFPSNS) and first-order closed loop negative feedback (FCLNF) techniques. This method constructed the first-order LCLNF loop for the power stage and further reduced the impact of the power supply noise on the power amplifier output by using FFPSNS technology to introduce the power supply noise into the feedback loop at the same time. The 0.35 μm CMOS process is used for analysis and comparison in Cadence. Cadence simulation results indicate that PSRR at the power supply noise frequency of 200 Hz is improved with 36.02 dB. The power supply induced intermodulation distortion (PS-IMD) components are decreased by approximately 15.57 dB and the signal-to-noise ratio (SNR) of the power amplifier is increased by 17 dB. The total harmonic distortion + noise (THD + N) of the power amplifier is reduced to 0.02% by FCLNF + FFPSNS.

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Kolano, Krzysztof. "Calculation Of The Brushless DC Motor Shaft Speed With Allowances For Incorrect Alignment Of Sensors." Metrology and Measurement Systems 22, no. 3 (September 1, 2015): 393–402. http://dx.doi.org/10.1515/mms-2015-0038.

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Abstract The paper treats of correcting calculation errors of the BLDC motor speed, based on the time elapsed between successive changes in the shaft position sensor signal. The developed method enables correction of errors of the deployment of sensors as well as rotating elements of the observation system of the motor shaft position. The correction algorithm performance was analysed with the aid of a model implemented in Matlab-Simulink environment. After confirming usefulness of the developed method through simulation, its usefulness was verified in real closed-loop feedback systems with a BLDC motor. The results of measurements carried out at the developed laboratory station are presented.

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Kobayashi, Masaki, Hiromi Morita, Masaki Matsubara, Nobuyuki Shimizu, and Atsuyuki Morishima. "An Empirical Study on Short- and Long-Term Effects of Self-Correction in Crowdsourced Microtasks." Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 6 (June 15, 2018): 79–87. http://dx.doi.org/10.1609/hcomp.v6i1.13324.

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Self-correction for crowdsourced tasks is a two-stage setting that allows a crowd worker to review the task results of other workers; the worker is then given a chance to update his/her results according to the review.Self-correction was proposed as an approach complementary to statistical algorithms in which workers independently perform the same task. It can provide higher-quality results with few additional costs. However, thus far, the effects have only been demonstrated in simulations, and empirical evaluations are needed. In addition, as self-correction gives feedback to workers, an interesting question arises: whether perceptual learning is observed in self-correction tasks. This paper reports our experimental results on self-corrections with a real-world crowdsourcing service.The empirical results show the following: (1) Self-correction is effective for making workers reconsider their judgments. (2) Self-correction is more effective if workers are shown task results produced by higher-quality workers during the second stage. (3) Perceptual learning effect is observed in some cases. Self-correction can give feedback that shows workers how to provide high-quality answers in future tasks.The findings imply that we can construct a positive loop to improve the quality of workers effectively.We also analyze in which cases perceptual learning can be observed with self-correction in crowdsourced microtasks.

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SCHWARZ, MARKUS, RALF HOFMANN, and FRANCESCO GIACOSA. "RADIATIVE CORRECTIONS TO THE PRESSURE AND THE ONE-LOOP POLARIZATION TENSOR OF MASSLESS MODES IN SU(2) YANG–MILLS THERMODYNAMICS." International Journal of Modern Physics A 22, no. 06 (March 10, 2007): 1213–37. http://dx.doi.org/10.1142/s0217751x07035227.

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We compute the one-loop polarization tensor Π for the on-shell, massless mode in a thermalized SU(2) Yang–Mills theory being in its deconfining phase. Postulating that [Formula: see text], we discuss Π's effect on the low-momentum part of the black-body spectrum at temperatures ~2,…,4 T CMB where T CMB ~ 2.73 K . A table-top experiment is proposed to test the above postulate. As an application, we point out a possible connection with the stability of dilute, cold, and old innergalactic atomic hydrogen clouds. We also compute the two-loop correction to the pressure arising from the instantaneous massless mode in unitary-Coulomb gauge, which formerly was neglected, and present improved estimates for subdominant corrections.

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Kumozaki, K. "Error correction performance in digital subscriber loop transmission systems." IEEE Transactions on Communications 39, no. 8 (1991): 1170–74. http://dx.doi.org/10.1109/26.134001.

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Bai, Xiaojian, Bum-Hoon Lee, and I. Y. Park. "Worldsheet one-loop energy correction to IIA giant magnon." International Journal of Modern Physics A 29, no. 17 (June 26, 2014): 1450083. http://dx.doi.org/10.1142/s0217751x14500833.

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We compute one-loop corrections to the energy of a IIA giant magnon solution in the AdS4×ℂP3 background by using the standard quantum field theory (QFT) techniques. The string action is expanded around the solution to the quadratic order in the fluctuation fields. The resulting action has 2D coordinate dependent-coefficients, a feature that complicates the analysis. The solution contains a worldsheet velocity parameter v, and is expanded in terms of the parameter. A perturbative analysis is carried out by treating the v-dependent parts as vertices. The energy is computed by first putting the system in a box of length L and Fourier-transforming the fields into discrete momentum modes. We compare our result with the results obtained by the algebraic curve method.

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YUE, CHONG XING, GONG RU LU, and JIN MIN YANG. "TOP-LOOP CORRECTION TO NEUTRAL PSEUDO-GOLDSTONE BOSON DECAYS." Modern Physics Letters A 08, no. 30 (September 28, 1993): 2843–49. http://dx.doi.org/10.1142/s0217732393003226.

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We develop the total effective Lagrangian of the two-photon couplings to the color-singlet neutral pseudo-Goldstone boson P0, as predicted in technicolor models. We calculate the effect of t-quark loop on the coupling. Such effect significantly changes the coupling strength which ordinarily arise from the Wess-Zumino term.

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Wen, Zi, Zhi-Tao Huang, Ran Zhang, and Cheng Peng. "Correction to: ZNF143 is a regulator of chromatin loop." Cell Biology and Toxicology 35, no. 1 (December 14, 2018): 81–82. http://dx.doi.org/10.1007/s10565-018-09452-6.

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Kniehl, Bernd A. "Two-loop QED vertex correction from virtual heavy fermions." Physics Letters B 237, no. 1 (March 1990): 127–29. http://dx.doi.org/10.1016/0370-2693(90)90474-k.

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