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( A. R. Prasannan ),( Jeetendra Aggarwal ),( A. K. Das ),( Jayanta Biswas ) 호남수학회 2017 호남수학학술지 Vol.39 No.4
A new class of functions called R<sub>θ</sub>-supercontinuous functions is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity, which already exist in the literature, is elaborated. The class of R<sub>θ</sub>-supercontinuous functions properly contains the class of R<sub>z</sub>-supercontinuous functions [39] which in turn properly contains the class of R<sub>cl</sub>-supercontinuous functions [43] and so includes all cl-supercontinuous (clopen continuous) functions ([38], [34]) and is properly contained in the class of R<sub>δ</sub>-supercontinuous functions [24].
Prasannan, A.R.,Aggarwal, Jeetendra,Das, A.K.,Biswas, Jayanta The Honam Mathematical Society 2017 호남수학학술지 Vol.39 No.4
A new class of functions called $R_{\theta}$-supercontinuous functions is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity, which already exist in the literature, is elaborated. The class of $R_{\theta}$-supercontinuous functions properly contains the class of $R_z$-supercontinuous functions [39] which in turn properly contains the class of $R_{cl}$-supercontinuous functions [43] and so includes all cl-supercontinuous (clopen continuous) functions ([38], [34]) and is properly contained in the class of $R_{\delta}$-supercontinuous functions [24].
GW170817: Measurements of Neutron Star Radii and Equation of State
Abbott, B. P.,Abbott, R.,Abbott, T. D.,Acernese, F.,Ackley, K.,Adams, C.,Adams, T.,Addesso, P.,Adhikari, R. X.,Adya, V. B.,Affeldt, C.,Agarwal, B.,Agathos, M.,Agatsuma, K.,Aggarwal, N.,Aguiar, O. D.,A American Physical Society 2018 Physical Review Letters Vol.121 No.16
<P>On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions found in the interior of these stars. The initial, minimal-assumption analysis of the LIGO and Virgo data placed constraints on the tidal effects of the coalescing bodies, which were then translated to constraints on neutron star radii. Here, we expand upon previous analyses by working under the hypothesis that both bodies were neutron stars that are described by the same equation of state and have spins within the range observed in Galactic binary neutron stars. Our analysis employs two methods: the use of equation-of-state-insensitive relations between various macroscopic properties of the neutron stars and the use of an efficient parametrization of the defining function p(rho) of the equation of state itself. From the LIGO and Virgo data alone and the first method, we measure the two neutron star radii as R-1 = 10.8(-1.7)(+2.0) km for the heavier star and R-2 = 10.7(-1.5)(+2.1) km for the lighter star at the 90% credible level. If we additionally require that the equation of state supports neutron stars with masses larger than 1.97 M-circle dot as required from electromagnetic observations and employ the equation-of-state parametrization, we further constrain R-1 = 11.9(-1.4)(+1.4) km and R-2 = 11.9(-1.4)(+1.4) km at the 90% credible level. Finally, we obtain constraints on p(rho) at supranuclear densities, with pressure at twice nuclear saturation density measured at 3.5(-1.7)(+2.7) x 10(34) dyn cm(-2) at the 90% level.</P>
Beam-Energy Dependence of Directed Flow of Λ , Λ¯ , K± , Ks0 , and ϕ in Au+Au Collisions
Adamczyk, L.,Adams, J. R.,Adkins, J. K.,Agakishiev, G.,Aggarwal, M. M.,Ahammed, Z.,Ajitanand, N. N.,Alekseev, I.,Anderson, D. M.,Aoyama, R.,Aparin, A.,Arkhipkin, D.,Aschenauer, E. C.,Ashraf, M. U.,Att American Physical Society 2018 Physical Review Letters Vol.120 No.6
A Study of Partial Carbonisation for the Development of Pitch Based Carbon Fibres
R.K. Aggarwal,G. Bhatia,V. Raman,M. Saha,A. Mishra 한국탄소학회 2004 Carbon Letters Vol.5 No.1
A study of partial carbonisation of green pitch fibres to temperatures in the range of 500-1000℃ was carried out on three precursors - a neat pitch and two polymer modified pitches, with a view to find out a suitable temperature at which the fibres acquire considerably improved toughness or handleability (compared to that in the green stage) for their subsequent processing into carbon fibres. A partial carbonisation temperature of 500-600℃ has been identified to result in a remarkable improvement in the toughness/handleability of the fibres in all the three cases. However, from techno-economical considerations, the neat pitch appears to provide the best precursor system for the production of pitch based carbon fibres.
A NOVEL APPROACH TO DETECTION ARCING FAULTS IN TRANSMISSION LINES USING WAVELET TRANSFORMS
Kim,C.H,Byun,S.H,Kim,H,Kim,I.D,Aggarwal,R.K,Johns,A.T 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-
In this paper. we present a new approach to detect high impedance fault (HIF) and low impedance fault (LIF) in transmission line. The wavelet transform of a signal consists in measuring the "similarity" between the signal and a set of shifted and scaled versions of a "mother wavelet". The "mother wavelet" is a chosen fact decaying oscillation function. A number of mother wavelets for signal analysis have becn proposed and some of them are useful in fault detection. However the performance of fault detection depends on used mother wavelet. In the present paper, a comparative evaluation of different mother wavelets for HIF and LIF detection is performed. The discussion is focused on well-known mother wavelet. which is based on wavelet transform. Several families of wavelets are used to analyze HIF and LIF signals in a 345kV Korean model system as generated by EMTP.
A.R. Prasannan,Jeetendra Aggarwal,A.K. Das,Jayanta Biswas 호남수학회 2017 호남수학학술지 Vol.39 No.4
A new class of functions called $R_{\theta}$-supercontinuous functions is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity, which already exist in the literature, is elaborated. The class of $R_{\theta}$-supercontinuous functions properly contains the class of $R_{z}$-supercontinuous functions \cite{refjdb1} which in turn properly contains the class of $R_{\emph{cl}}$-supercontinuous functions \cite{reftks1} and so includes all \emph{cl}-supercontinuous (clopen continuous) functions (\cite{refds2}, \cite{refrv1}) and is properly contained in the class of $R_{\delta}$-supercontinuous functions \cite{refjdj3}.
A Study of Partial Carbonisation for the Development of Pitch Based Carbon Fibres
Aggarwal, R.K.,Bhatia, G.,Raman, V.,Saha, M.,Mishra, A. Korean Carbon Society 2004 Carbon Letters Vol.5 No.1
A study of partial carbonisation of green pitch fibres to temperatures in the range of 500-$1000^{\circ}C$ was carried out on three precursors - a neat pitch and two polymer modified pitches, with a view to find out a suitable temperature at which the fibres acquire considerably improved toughness or handleability (compared to that in the green stage) for their subsequent processing into carbon fibres. A partial carbonisation temperature of 500-$600^{\circ}C$ has been identified to result in a remarkable improvement in the toughness/handleability of the fibres in all the three cases. However, from techno-economical considerations, the neat pitch appears to provide the best precursor system for the production of pitch based carbon fibres.
Effect of Compositional Parameters on the Characteristics of C-SiC-$B_4C$ Composites
Aggarwal, R.K.,Bhatia, G.B.,Saha, M.,Mishra, A. Korean Carbon Society 2004 Carbon Letters Vol.5 No.4
Carbon-ceramic composites refer to a special class of carbon based materials which cover the main drawbacks of carbon, particularly its proneness to air oxidation, while essentially retaining its outstanding properties. In the present paper, the authors report the results of a systematic study made towards the development of C-SiC-$B_4C$ composites, which involves the effects of compositional parameters, namely, carbon-to-ceramic and ceramic-to-ceramic ratios, on the oxidation behaviour as well as other characteristics of these composites. The C-SiC-$B_4C$ composites, heat-treated to $1400^{\circ}C$, have shown that their oxidation behaviour at temperatures of 800~$1200^{\circ}C$ depends jointly on the total ceramic content and the SiC : $B_4C$ ratio. Good compositions of C-SiC-$B_4C$ composites exhibiting zero weight loss in air at temperatures of 800~$1200^{\circ}C$ for periods of 4~9 h, have been identified. Composites with these compositions undergo a weight gain or a maximum weight loss of less than 3% during the establishment of a protective layer at the surface of carbon in a period of 1~6 h. Significant improvement in the strength of C-SiC-$B_4C$ composites has been observed which increases with an increase in the total ceramic content and also with an increase in the SiC : $B_4C$ ratio.
Abbott, B P,Abbott, R,Abbott, T D,Abernathy, M R,Acernese, F,Ackley, K,Adams, C,Adams, T,Addesso, P,Adhikari, R X,Adya, V B,Affeldt, C,Agathos, M,Agatsuma, K,Aggarwal, N,Aguiar, O D,Aiello, L,Ain, A,A Institute of Physics 2018 Classical and quantum gravity Vol.35 No.6
<P>We present the results of a search for long-duration gravitational wave transients in the data of the LIGO Hanford and LIGO Livingston second generation detectors between <img ALIGN='MIDDLE' ALT='$ \newcommand{\OOneStart}{{\rm 12 ~September ~2015}} \newcommand{\OOneStartShort}{{\rm September ~2015}} \OOneStartShort$ ' SRC='http://ej.iop.org/images/0264-9381/35/6/065009/cqgaaab76ieqn001.gif'/> and <img ALIGN='MIDDLE' ALT='$ \newcommand{\OOneStop}{{\rm 19~ January ~2016}} \newcommand{\OOneStopShort}{{\rm January~ 2016}} \OOneStopShort$ ' SRC='http://ej.iop.org/images/0264-9381/35/6/065009/cqgaaab76ieqn002.gif'/>, with a total observational time of <img ALIGN='MIDDLE' ALT='$ \newcommand{\OOneLivetime}{{\rm 49~d}} \OOneLivetime$ ' SRC='http://ej.iop.org/images/0264-9381/35/6/065009/cqgaaab76ieqn003.gif'/>. The search targets gravitational wave transients of 10–500 s duration in a frequency band of 24–2048 Hz, with minimal assumptions about the signal waveform, polarization, source direction, or time of occurrence. No significant events were observed. As a result we set 90% confidence upper limits on the rate of long-duration gravitational wave transients for different types of gravitational wave signals. We also show that the search is sensitive to sources in the Galaxy emitting at least ∼10<SUP>−8</SUP> <img ALIGN='MIDDLE' ALT='$ \newcommand{\msuncd}{{\rm M_{\odot} c^2}} \newcommand{\msun}{{\rm M_{\odot}}} {\msuncd}$ ' SRC='http://ej.iop.org/images/0264-9381/35/6/065009/cqgaaab76ieqn004.gif'/> in gravitational waves.</P>