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Journal articles on the topic 'Sublevel'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Деменев, А. А., Н. А. Гиппиус та В. Д. Кулаковский. "Динамика спинорной экситон-поляритонной системы в латерально сжатых GaAs микрорезонаторах при резонансном фотовозбуждении". Физика твердого тела 60, № 8 (2018): 1567. http://dx.doi.org/10.21883/ftt.2018.08.46245.06gr.

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AbstractThe evolution of the spatial coherence and the polarization has been studied in a freely decaying polariton condensate that is resonantly excited by linearly polarized picosecond laser pulses at the lower and upper sublevels of the lower polariton branch in a high-Q GaAs-based microcavity with a reduced lateral symmetry without excitation of the exciton reservoir. It is found that the condensate inherits the coherence of the exciting laser pulse at both sublevels in a wide range of excitation densities and retains it for several dozen picoseconds. The linear polarization of the photoex

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2

Khazaei, Soroush, and Yashar Pourrahimian. "Mathematical Programming Application in Sublevel Caving Production Scheduling." Mining 1, no. 2 (2021): 180–91. http://dx.doi.org/10.3390/mining1020012.

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Production scheduling determines the most beneficial mining sequence over the life of a mine. Developing a schedule that meets all mining aspects can substantially reduce mining costs and increase profitability. Among all underground mining methods, the sublevel caving method is a common method with moderate development requirements, a high production rate, and a high degree of mechanization and flexibility. None of the manual planning methods and heuristic algorithms used in commercial software will lead to a truly optimal schedule. Mathematical programming models, particularly mixed-integer

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3

Zohdi, Ismail, Louay S. El Sharkawy, Mahmoud F. El Bestar, Hazem M. Abdel Tawab, Mo'men A. A. Hamela, and Amal A. Hareedy. "Selective Neck Dissection (IIa, III): A Rational Replacement for Extended Supraomohyoid Neck Dissection in Patients with N0 Supraglottic and Glottic Squamous Cell Carcinoma." Clinical Medicine Insights: Ear, Nose and Throat 8 (January 2015): CMENT.S19874. http://dx.doi.org/10.4137/cment.s19874.

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Objectives To evaluate the effectiveness of selective neck dissection of sublevel IIa and level III in cases of glottis and supraglottic laryngeal carcinoma in the absence of lymph node metastasis and to show if there is value in dissecting the sublevel IIb or level IV in these cases. Patients and Methods Twenty-five patients with N0 glottic or supraglottic cancer were subjected to unilateral or bilateral selective neck dissection according to the site and the extent of the tumor, and the specimens were histopathologically examined for metastasis. Results Twenty-five patients (23 males and 2 f

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4

Kruchinin, Sergei P., Hiroyuki Kawabe, Hidemi Nagao, and Yasuhiro Nakazawa. "Condensation Energy for a Two-Gap Superconducting State in Nanoparticles." Journal of Nanoparticles 2013 (September 4, 2013): 1–6. http://dx.doi.org/10.1155/2013/576232.

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Recent technology and experiments have fabricated high-quality superconducting MgB2 nanoparticles. We investigate properties of two-gap superconductivity in nanosized systems by using a two-sublevel model. In the present work, we analyze the results obtained for superconducting granules in the case of multiband superconductivity. We discuss the finite size effect in multiband superconductors. A definition of the critical level spacing of two-gap superconductivity is also presented, and we discuss the condensation energy and the parity gap of two-gap superconductivity in relation to the size de

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5

Das, Tapasi, Lalita Sharma, and Rajesh Srivastava. "Electron impact excitation and polarization studies of Fe-like W48+ to Al-like W61+ ions." Canadian Journal of Physics 93, no. 8 (2015): 888–97. http://dx.doi.org/10.1139/cjp-2014-0636.

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A fully relativistic distorted wave theory has been employed to study electron impact excitations of specific magnetic sublevels in Fe-like W48+ through Al-like W61+ ions. M-shell excitations, namely, 3p → 3d by electron impact have been considered in these 14 tungsten ions. Excitation cross sections are reported for incident electron energies from the threshold to 20 keV. In addition, for each transition, analytic fitting to the cross sections are provided. The degree of polarization of the emitted photons from the decay of the different excited anisotropic states of the tungsten ions is also

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6

Moors, Warren B. "Weak compactness of sublevel sets." Proceedings of the American Mathematical Society 145, no. 8 (2017): 3377–79. http://dx.doi.org/10.1090/proc/13466.

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7

Sandle, W. J., and D. M. Warrington. "Level and sublevel coherence effects." Physica Scripta T70 (January 1, 1997): 159–62. http://dx.doi.org/10.1088/0031-8949/1997/t70/022.

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8

Gressman, Philip T. "Uniform Sublevel Radon-like Inequalities." Journal of Geometric Analysis 23, no. 2 (2011): 611–52. http://dx.doi.org/10.1007/s12220-011-9256-2.

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9

Csanak, G., C. J. Fontes, D. P. Kilcrease, and D. V. Fursa. "Creation, destruction, and transfer of atomic multipole moments by electron scattering: relativistic treatment1This article is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas." Canadian Journal of Physics 89, no. 5 (2011): 521–31. http://dx.doi.org/10.1139/p11-029.

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We have obtained expressions for the creation, destruction, and transfer of atomic multipole moments by electron scattering under relativistic conditions. More specifically, we have obtained separate expressions for different-level processes (inelastic scattering) and for same-level processes (elastic and inelastic scattering). The cross sections for different-level processes are expressed in terms of inelastic magnetic sublevel cross sections, except for the coherence transfer cross section, which is expressed in terms of an angular integral of a product of inelastic magnetic sublevel amplitu

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10

Lv, Hua Wen. "Strata Behaviors of Fully-Mechanized Sublevel Caving Face Based on Similar Simulation Test." Advanced Materials Research 734-737 (August 2013): 638–43. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.638.

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in view of research situations of the fully mechanized sublevel caving, the similar simulation test model for fully mechanized sublevel caving was presented. During the top-coal caving process, variation of top-coal subsidence and abutment pressure were measured. Consequently, the ground pressure behavior of fully mechanized sublevel caving was analyzed. The following conclusions can be reached: (1) top coal subsidence experiences the process of slow increase, trend to aggressive and sharp increase; (2) undulate change as well as decay after reaching the peak of abutment pressure is appeared w

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11

Yu, Bin, Jun Zhao, and Hong Chun Xia. "Study on Technology of Fully-Mechanized Sub-Level Caving Mining Technology in the Datong Permo Carboniferous Coal Seam." Advanced Materials Research 616-618 (December 2012): 565–68. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.565.

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This thesis briefly introduced roof control technology in fully-mechanized sublevel caving mining with hard roof and hard coal seam, Mining technology , gas prevention and comprehensive prevention and control technology in spontaneous combustion of coal, which in longwall top-coal caving face with hydraulic support in thickness seam in the Datong permo carboniferous coal seam . New development directions of fully-mechanized sublevel caving mining technology in the Datong mining area in the next few years.

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12

Antipin, Iurii. "Substantiation of the parameters of open stoping mining method with abandonment of unrecoverable pillars." Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, no. 4 (June 25, 2021): 15–23. http://dx.doi.org/10.21440/0536-1028-2021-4-15-23.

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Relevance. Developing inclined ore bodies of low and uneven thickness using mining systems with caving results in great losses and dilution, deteriorating the conditions for ore gravitation. As a consequence, it becomes necessary to slice the barren rock in the lying side to form slopes with the desired angle. There are also characteristic ore losses at the dead end of the drawing drift independent of the ore body thickness, therefore acquiring a significant role under a lesser thickness. The height of the sublevels, limited by the ore body’s inclination, leads to a considerable amount of prep

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13

Yu, Kunpeng, Fengyu Ren, Gideon Chitombo, Ruslan Puscasu, and Liangliang Kang. "Optimum Sublevel Height and Drift Spacing in Sublevel Cave Mining Based on Random Medium Theory." Mining, Metallurgy & Exploration 37, no. 2 (2020): 681–90. http://dx.doi.org/10.1007/s42461-020-00185-x.

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14

Lasserre, Jean B. "Level Sets and NonGaussian Integrals of Positively Homogeneous Functions." International Game Theory Review 17, no. 01 (2015): 1540001. http://dx.doi.org/10.1142/s0219198915400010.

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We investigate various properties of the sublevel set G = {x : g(x) ≤ 1} and the integration of h on this sublevel set when g and h are positively homogeneous functions (and in particular homogeneous polynomials). For instance, the latter integral reduces to integrating h exp (-g) on the whole space ℝn (a nonGaussian integral) and when g is a polynomial, then the volume of G is a convex function of the coefficients of g. We also provide a numerical approximation scheme to compute the volume of G or integrate h on G (or, equivalently to approximate the associated nonGaussian integral). We also

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15

Dieu, Nguyen Quang, and Tang van Long. "Sublevel sets of certain extremal functions." MATHEMATICA SCANDINAVICA 101, no. 2 (2007): 184. http://dx.doi.org/10.7146/math.scand.a-15039.

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16

Gressman, Philip T. "Uniform geometric estimates of sublevel sets." Journal d'Analyse Mathématique 115, no. 1 (2011): 251–72. http://dx.doi.org/10.1007/s11854-011-0029-4.

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17

Sun, Mingzhi, Fengyu Ren, and Hangxing Ding. "Optimization of Stope Structure Parameters Based on the Mined Orebody at the Meishan Iron Mine." Advances in Civil Engineering 2021 (July 9, 2021): 1–14. http://dx.doi.org/10.1155/2021/8052827.

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Based on the engineering background of the Meishan iron mine with sublevel caving (SLC) method, in this work, we adopted the method for identifying the shape of mined orebody (the original location in blasted slice), which analyzed and determined reasonable stope structure parameters. In the field test, the markers were arranged in the blasted slice, the mined orebody was measured by in situ tests, and reliable data were achieved. The shape of the mined orebody was obtained through this test when the width of drift was 6 m. The mined orebody’s shape was compared with the shape of the isolated

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18

Guo, Qi Feng, and Fen Hua Ren. "Optimization and Tests on the Independent Advance of Ore Breaking with High Sublevel and Large Drift Interval." Advanced Materials Research 361-363 (October 2011): 120–24. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.120.

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According to the mining conditions and equipment level of Xingshan iron mine, optimization research on the stope structural parameters of sublevel caving was made, and finally adopted the structure parameters with 15m sublevel height and 20m drift interval. In order to find out the rational independent advance of ore breaking under 15m×20m structural parameters, theoretical arithmetic and industrial tests were carried out. The tests show that the rational independent advance of ore breaking drift interval should be 3.4m, and the optimized structural parameters of 15m×20m×3.4m has excellent eff

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19

Zhang, Jia Fan. "Analytical Solution and Engineering Application of the Inclined Rectangle Plate under Longitudinal and Lateral Load." Advanced Materials Research 168-170 (December 2010): 696–700. http://dx.doi.org/10.4028/www.scientific.net/amr.168-170.696.

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To the inclined rectangle plate subjected to forces acting longitudinally and laterally, the analytical solution of deflection, stress and inner force, considering the influence of inner force in central surface on the bending of the plate, were given by using the theory of plate and energy method. In accordance with the characteristics of structural form of rock layers in horizontal section top coal sublevel caving for the mining steep seam, deflected deformation rules of the roof and evolution path along influencing factors were discussed, the critical technical parameter of horizontal secti

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20

Melo, Michel, Cláudio Lúcio Lopes Pinto, and José lldefonso Gusmão Dutra. "Potvin stability graph applied to brazilian geomechanic environment." Rem: Revista Escola de Minas 67, no. 4 (2014): 413–19. http://dx.doi.org/10.1590/0370-44672014670171.

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Empirical methods should be restricted to situations similar to the circumstances used for their development. The Stability Graph Method, first proposed by Mathews et al. (1981) and later modified by Potvin (1988), was based on data from Canadian and Australian mines. Therefore, there is no evidence of their use in the Brazilian geomechanical context. The Stability Graph Method is intended to design a stable open stope in mines using the Sublevel Stoping Mining method. The present study investigates the applicability of the methods in Sublevel Stoping Brazilian mines. This is a contribution to

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21

Tu, Jingzhi, Yanlin Zhang, Gang Mei, and Nengxiong Xu. "Numerical Investigation of Progressive Slope Failure Induced by Sublevel Caving Mining Using the Finite Difference Method and Adaptive Local Remeshing." Applied Sciences 11, no. 9 (2021): 3812. http://dx.doi.org/10.3390/app11093812.

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Slope failure induced by sublevel caving mining is a progressive process, resulting in the large deformation and displacement of rock masses in the slope. Numerical methods are widely used to investigate the above phenomenon. However, conventional numerical methods have difficulties when simulating the process of progressive slope failure. For example, the discrete element method (DEM) for block systems is computationally expensive and possibly fails for large-scale and complex slope models, while the finite difference method (FDM) has a mesh distortion problem when simulating progressive slop

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22

Beer, Gerald, and Roberto Lucchetti. "Convergence of epigraphs and of sublevel sets." Set-Valued Analysis 1, no. 2 (1993): 159–83. http://dx.doi.org/10.1007/bf01027690.

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23

Weidner, Petra. "Lower semicontinuous functionals with uniform sublevel sets." Optimization 66, no. 4 (2017): 491–505. http://dx.doi.org/10.1080/02331934.2017.1279161.

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24

Dilecce, G., P. F. Ambrico, and S. De Benedictis. "He(43P) sublevel quenching by electron collision." Journal of Physics B: Atomic, Molecular and Optical Physics 28, no. 2 (1995): 209–23. http://dx.doi.org/10.1088/0953-4075/28/2/010.

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25

Potvin, Yves. "Special issue on block and sublevel caving." Mining Technology 119, no. 3 (2010): 111. http://dx.doi.org/10.1179/174328610x12851618482200.

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26

Lasserre, Jean B. "Volume of Sublevel Sets of Homogeneous Polynomials." SIAM Journal on Applied Algebra and Geometry 3, no. 2 (2019): 372–89. http://dx.doi.org/10.1137/18m1222478.

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27

Suter, Dieter, and Thomas Marty. "Laser induced dynamics of atomic sublevel coherences." Optics Communications 100, no. 5-6 (1993): 443–50. http://dx.doi.org/10.1016/0030-4018(93)90242-w.

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28

Weidner, Petra. "Construction of functions with uniform sublevel sets." Optimization Letters 12, no. 1 (2017): 35–41. http://dx.doi.org/10.1007/s11590-017-1167-0.

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29

Richard, Jean-Pierre. "The CEFR-J Hierarchy and its Relationship with TOEIC Listening and Reading." JALT Postconference Publication - Issue 2020.1; August 2021 2020, no. 1 (2021): 407. http://dx.doi.org/10.37546/jaltpcp2020-50.

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Runnels (2016) investigated the CEFR-J self-assessment sublevel hierarchy and its relationship with TOEIC Listening and Reading (TOEIC L&R). Runnels (a) found learners did not distinguish between adjacent sublevels, and (b) observed mostly small-to-negligible Pearson’s r correlations between CEFR-J and TOEIC L&R, with slightly stronger correlations for listening. In the current study, participants (N = 53) completed a questionnaire (k = 36) with statements representing CEFR-J sublevels A1.1 to B2.2. Groups (i.e., A>B) and levels (i.e., A1>A2≧B1>B2) performed as predicted; howe

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30

Zhai, Xin Xian, Yan Wei Zhai, and Shi Wei Zhang. "Study on Strata Behaviors of the Coal Face with Sublevel Caving in Hugely-Thick Coal Seam in Qianqiu Coal Mine." Advanced Materials Research 671-674 (March 2013): 1150–55. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.1150.

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Qianqiu Coal Mine, Yima Coal Group Company Limited, China, has been mining the gently-inclined and hugely-thick coal seam #2-3. The overburden above the coal seam has hugely-thick conglomerate strata with more than 400m thickness, which has significant effects on the strata behaviors of the coal face with sublevel caving. Therefore, study on strata behaviors has an important practical significance to surrounding rocks control and safety production at the coal face. Using theoretical analysis and field observation methods, the following conclusions can be drawn: (1) the surrounding rocks of the

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31

Milic, Vitomir, Igor Svrkota, and Dejan Petrovic. "Determination of optimal parameters for sublevel stopping method." Mining and Metallurgy Engineering Bor, no. 3 (2013): 97–112. http://dx.doi.org/10.5937/mmeb1303097m.

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32

Lárusson, Finnur, Patrice Lassere, and Ragnar Sigurdsson. "Convexity of sublevel sets of plurisubharmonic extremal functions." Annales Polonici Mathematici 68, no. 3 (1998): 267–73. http://dx.doi.org/10.4064/ap-68-3-267-273.

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33

Dieu, Nguyen Quang, Dau Hoang Hung, Tiên So’n Phạm, and Hoang Thieu Anh. "Volume estimates of sublevel sets of real polynomials." Annales Polonici Mathematici 121, no. 2 (2018): 157–74. http://dx.doi.org/10.4064/ap170913-25-4.

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34

Carbery, Anthony, Michael Christ, and James Wright. "Multidimensional van der Corput and sublevel set estimates." Journal of the American Mathematical Society 12, no. 4 (1999): 981–1015. http://dx.doi.org/10.1090/s0894-0347-99-00309-4.

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35

Deligiannakis, Y., A. Ivancich, and A. W. Rutherord. "2D-Hyperfine sublevel correlation spectroscopy of tyrosyl radicals." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 58, no. 6 (2002): 1191–200. http://dx.doi.org/10.1016/s1386-1425(01)00709-0.

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36

Astrakas, L., Y. Deligiannakis, G. Mitrikas, and George Kordas. "Hyperfine sublevel correlation spectroscopy in lithium silicate glasses." Journal of Chemical Physics 109, no. 19 (1998): 8612–16. http://dx.doi.org/10.1063/1.477527.

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37

Freidin, A. M., S. A. Neverov, A. A. Neverov, and P. A. Filippov. "Mine stability with application of sublevel caving schemes." Journal of Mining Science 44, no. 1 (2008): 82–91. http://dx.doi.org/10.1007/s10913-008-0008-z.

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38

Nabutovsky, Alexander. "Disconnectedness of sublevel sets of some Riemannian functionals." Geometric and Functional Analysis 6, no. 4 (1996): 703–25. http://dx.doi.org/10.1007/bf02247118.

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39

Shane, J. J., P. Höfer, E. J. Reijerse, and E. de Boer. "Hyperfine sublevel correlation spectroscopy (HYSCORE ) of disordered solids." Journal of Magnetic Resonance (1969) 99, no. 3 (1992): 596–604. http://dx.doi.org/10.1016/0022-2364(92)90215-s.

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40

Takahashi, Y., K. Fukuda, T. Kinoshita, and T. Yabuzaki. "Sublevel spectroscopy of alkali atoms in superfluid helium." Zeitschrift f�r Physik B Condensed Matter 98, no. 3 (1995): 391–93. http://dx.doi.org/10.1007/bf01338412.

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41

SOKOLOV, Igor, Yury ANTIPIN, and Artem ROZHKOV. "MODERNIZATION OF THE MINING SYSTEM OF SMALL DEPOSITS OF RICH COPPER PYRITE ORES." Sustainable Development of Mountain Territories 12, no. 3 (2020): 444–53. http://dx.doi.org/10.21177/1998-4502-2020-12-3-444-453.

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The purpose work. Substantiation and selection of a safe and effective option of mining technology of the experimental block in the pilot industrial mining of the Skalistoe deposit. Method of research. Analysis and synthesis of project solutions, experience in mining inclined low-thickness ore bodies, economic and mathematical modeling and optimization of the parameters of options mining systems in the conditions of the experimental block. Results of research. As a result of research it was established: - the sublevel caving mining system with the parameters adopted in the project does not gua

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42

Yu, Lei. "Study on Abutment Pressure Distribution Law of Fully-Mechanized Sublevel Caving Face in Extra-Thickness." Advanced Materials Research 1094 (March 2015): 405–9. http://dx.doi.org/10.4028/www.scientific.net/amr.1094.405.

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Based on field observation, analogy simulation and theoretical analysis, the abutment pressure distribution law of fully-mechanized sublevel caving face with extra-thickness was studied. The results showed that: Different instability type of the structure ‘Combined cantilever beam-articulated rock beam’ in fully-mechanized sublevel caving roof led to cyclical changes of abutment pressure; with an invariable coal seam thickness and increasing cutting height, abutment pressure peak value tended to stabilize after reaching the maximum, but as the working face advancing its location transferred to

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43

Li, Guanghui, Fengyu Ren, Hangxing Ding, Huan Liu, Mingzhi Sun, and Guang Li. "A Dynamic Intersecting Arrangement Model Based on Isolated Draw Zones for Stope Structure Optimization during Sublevel Caving Mining." Mathematical Problems in Engineering 2021 (January 19, 2021): 1–13. http://dx.doi.org/10.1155/2021/6669558.

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In this paper, stope structure optimization during sublevel caving mining is considered under the condition that the isolated draw zones (IDZs) are nonstandard ellipsoid, which is realized by dynamically adjusting the arrangement of IDZs and quantifying the degree of intersection of IDZs according to an ore profit and loss calculation model. A dynamic intersecting arrangement model based on IDZs was proposed, which can dynamically adjust the sublevel height and drift spacing according to the ore-rock bulk flow parameters, economic indicators, occurrence condition of the ore body, drilling mach

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44

Ge, Qi Fa, Xue Sen Sun, Wei Gen Zhu, and Qing Gang Chen. "Research of Mining Method for Difficult-to-Mine Ore Bodies in Deep Mine." Advanced Materials Research 962-965 (June 2014): 1041–46. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.1041.

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There are many problems such as depth, high in-situ stress, high ground temperature and rockburst proneness etc. in deep mining. And it is an acknowledged and urgent mining technical puzzle about mining method of gently inclined and medium-thick ore bodies. For such an ore body in West wing of Dongguashan copper mine, if we use traditional mining method, it is hard to conquer such difficulties as high in-situ stress, large open area in roof, removal of mined ore by gravity etc. The theory of “large panel and lower sublevel height” will be easy to solve such problems. This paper use numerical t

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45

Filippov, Vladimir, Andrey Eremenko, and Igor Mokrousov. "GEOTECHNOLOGY IMPACT ON SEISMIC ACTIVITY OF THE AREA DURING MINING PROTECTIVE PILLAR IN CONDITIONS OF SHEREGESH DEPOSIT." Interexpo GEO-Siberia 2, no. 5 (2019): 75–80. http://dx.doi.org/10.33764/2618-981x-2019-2-5-75-80.

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Analysis of blasting works during reserves mining of protective pillar of level-and-room mining and sublevel mining with application of mobile machinery is carried out. It is established that high power explosions, carried out within border of protective pillar, longtime impact on rock solid (up to 2 days and more). Each explosion forms seismic active zone in which shocks occur on the distance up to 400v and more. Converse to technology of sublevel caving with application of mobile machinery has excepted carrying out explosions with large mass of explosive materials (10t and more). Through a m

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46

Duranović, Miodrag, Nemanja Đokić, Veljko Lapčević, Slavko Torbica, Milenko Petrović, and Ljiljana Savić. "Optimization of ring blasting in sublevel stoping gold mine." Podzemni radovi, no. 33 (2018): 61–68. http://dx.doi.org/10.5937/podrad1833061d.

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47

Leinwand, D. A., S. M. Lefkowitz, and H. C. Brenner. "Evidence for triplet state sublevel selective photochemistry in phthalazine." Journal of the American Chemical Society 107, no. 22 (1985): 6179–83. http://dx.doi.org/10.1021/ja00308a006.

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48

Ya-Bin, Dong, Gao Jiang-Rui, and Dong You-Er. "Quantum coherent effects in multi-Zeeman-sublevel atomic systems." Chinese Physics B 17, no. 9 (2008): 3306–12. http://dx.doi.org/10.1088/1674-1056/17/9/027.

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49

Ricceri, Biagio. "Integral Functionals on Lp-Spaces: Infima Over Sublevel Sets." Numerical Functional Analysis and Optimization 35, no. 7-9 (2014): 1197–211. http://dx.doi.org/10.1080/01630563.2014.908213.

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50

Suter, Dieter, Thomas Marty, and Harald Klepel. "Rotation properties of multipole moments in atomic sublevel spectroscopy." Optics Letters 18, no. 7 (1993): 531. http://dx.doi.org/10.1364/ol.18.000531.

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