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Free-surface velocity measurements of opaque materials in laser-driven shock-wave experiments using photonic Doppler velocimetry

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Matter and Radiation at Extremes 2021年第4期6卷 43-50页

作者： N.Nissim E.Greenberg M.Werdiger Y.Horowitz l.bakshi Y.Ferber B.Glam A.Fedotov-Gefen l.Perelmutter S.Eliezer Applied Physics Division Soreq NRCYavneIsrael Note:This paper is part of the Special Issue on Matter in Extreme States Created by Laser.

We present a novel photonic Doppler velocimetry(PDV)design for laser-driven shock-wave *** PDV design is intended to provide the capability of measuring the free-surface velocity of shocked opaque materials in the terapascal *** present measurements of the free-surface velocity of gold for as long as∼2 ns from the shock breakout,at pressures of up to∼7 Mbar and a free-surface velocity of 7.3 km/s with an error of∼1.5%.Such laboratory pressure conditions are achieved predominantly at high-intensity laser facilities where the only velocity diagnostic is usually line-imaging velocity interferometry for any ***,that diagnostic is limited by the lower dynamic range of the streak camera(at a temporal resolution relevant to laser shock experiments)to measure the free-surface velocity of opaque materials up to pressures of only∼1 *** expect the proposed PDV design to allow the free-surface velocity of opaque materials to be measured at much higher pressures.

关键词： shock wave interferometry

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Conservation of an important montane bamboo Thamnocalamus falconeri, *** Munro through axillary bud proliferation

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Journal of Forestry Research 2015年第1期26卷 179-185页

作者： Meena bakshi Chandrakant Tiwari Sajad Razvi Plant Physiology Discipline Botany DivisionForest ResearchInstitute

Thamnocalamus falconeri, Hook.f. ex Munro.,an important bamboo species belonging to the family Poaceae, locally known as Ringal, occurs in the hills of Uttarakhand, India. This species has been traditionally exploited by local communities to support their *** needs of the hill villages impose unsustainable pressure on natural stands of Ringal in the Uttarakhand hills and forests have been degraded. The long history of excessive cutting of Ringal from natural forests and the lack of replanting threaten villager livelihoods. Replanting is required to conserve the species. We propose a protocol for generation of planting material through axillary bud proliferation for multiplication and conservation of this species. We collected offsets/rhizomes from a natural stand of T. falconeri in the Chopta Mandal areas（Chamoli district, India）. These were planted at sites of varied elevation and fresh single nodal segments were collected from them as explants. Different sterilization treatments were assessed to combat contamination. Among these, treatment of 0.1 %Hg Cl2 followed by 5 % Na OCl, proved best. Among two cytokinin treatments, viz. BAP and Kinetin, singly or in combination, BAP alone（5 mg l-1） proved superior and resulted in 100 % bud break. BAP-supplemented MS media yielded maximum vigorous shoot formation（90 %）and maximum number of shoots（8.9）. Subculturing of shoots on the same medium with similar BAP treatment（5 mg l-1BAP） enabled continuous production of healthy shoots at similar frequency. Maximum rooting（100 %）was recorded on half-strength MS medium supplemented with 5 mg l-1IBA. Micropropagated plants were hardened and acclimatized in soil mixture（2：1：1） and then transplanted to field sites（Magra, Uttarakhand, 1,834 m）.Eight to ten months after field transplantation we recorded100 % survival of transplanted material. This micropropagation protocol could be used successfully for raising a stock of genetically homogenous plant material in bulk

关键词： Thamnocalamus falconeri Micropropagation MS medium Axillary bud proliferation Hormones

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加入授氢体提高减粘裂化的馏分油产率

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金山油化纤 1988年第3期 77-81页

作者： A.S.bakshi l.H.lutz 徐永芳总厂炼化部研究所

在重质原油和渣油改质中,为了提高馏分油产率,加授氢体的减粘裂化(Hydrogen donor visbreaking即HDV)可能是一个令人感兴趣的过程。 HDV是这样一个过程。授氢体提供了从渣油生产馏分油所需的氢。该过程是现有的减粘裂化和柴油缓和加氢... 详细信息

在重质原油和渣油改质中,为了提高馏分油产率,加授氢体的减粘裂化(Hydrogen donor visbreaking即HDV)可能是一个令人感兴趣的过程。 HDV是这样一个过程。授氢体提供了从渣油生产馏分油所需的氢。该过程是现有的减粘裂化和柴油缓和加氢两个工艺的结合,它能容易地适应现有的炼厂设备。

关键词：馏分油重质原油加氢处理改质延迟焦化 donor 加授单程转化率油浆重质油

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATlAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios l. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.l. Alberghi J. Albert P. Albicocco G.l. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo l. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines l. Baines O.K. Baker E. Bakos D. bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Baldin P. Balek E. Ballabene F. Balli l.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal l. Barak M. Barakat E.l. Barberio D. Barberis M. Barbero M.Z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow P. Baron D.A. Baron Mo The ATlAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATlAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATlAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATlAS JET QUARK GlUON TAGGING

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