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Massive neutrinos:where we are standing and where we are going

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Science Bulletin 2015年第23期60卷 2077-2079页

作者： shun zhou Institute of High Energy Physics Chinese Academy of Sciences Center for High Energy Physics Peking University

Neutrinos are the most elusive particles that we have ever discovered in *** are fermions of spin one-half and have no electric *** they interact with matter rather weakly,it is extremely difficult to catch them even ... 详细信息

关键词：中微子相互作用心理特性自然界费米子探测器电荷自旋

Removal of Cr from tannery sludge by bioleaching method

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Journal of Environmental Sciences 2006年第5期18卷 885-890页

作者： zhou shun-gui zhou Li-xiang WANG Shi-mei FANG Di College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 China

Bioleaching of Cr（Ⅲ） from tannery sludge using the mixture of ingenuous iron- and sulfur-oxidizing bacteria was investigated in batch flasks. Experiments involved the adaptation of indigenous iron-and sulfur-oxidizing bacteria, the pre-acidification the sludge to pH 6.0 and the addition of energy substrates. Results showed the inoculation of mixture of ingenuous iron- and sulfur-oxidizing bacteria and co-addition of Fe^2 and elemental sulfur accelerated acid production and increase of oxidation-reduction potential originating from the bio-oxidation of Fe2^＋ and elemental sulfur. Dissolved Cr concentration increased concomitant with pH decreased in the sludge and reached its maximum removal of 95.6%. The amelioration of the odor of bioleached sludge could be noted. However, 20.4%o of N, 24.5% of P and 14.3% of organic matter were lost in the bioleaching process. The residual Cr content in the leached tannery sludge was acceptable for use in agriculture. This study had shown the feasibility of applying the bioleaching process, developed for sewage sludge, to tannery sludge with high Cr.

关键词： tannery sludge: Cr: removal: bioleaching

Naumov- and Toshev-like relations in the renormalization-group evolution of quarks and Dirac neutrinos

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Chinese Physics C 2018年第10期42卷 38-43页

作者： Zhi-zhong Xing shun zhou Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Center for High Energy Physics Peking UniversityBeijing 100871China

In an analytical way of studying matter effects on neutrino oscillations, the Naumov and Toshev relations have been derived to respectively link the Jarlskog invariant of CP violation and the Dirac phase in the standard parametrization of the 3×3 flavor mixing matrix to their matter-corrected counterparts. Here we show that there exist similar relations for Dirac neutrinos and charged leptons evolving with energy scales via the one-loop renormalizationgroup （RG） equations in the tau-dominance approximation, and for the running behaviors of up- and down-type quarks in the top-dominance approximation, provided a different parametrization is taken into account.

关键词： fermion flavor mixing CP violation renormalization-group equations

Enhanced dielectric,ferroelectric,and optical properties in rare earth elements doped PMN-PT thin films

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Journal of Advanced Ceramics 2021年第1期10卷 98-107页

作者： shun zhou Dabin LIN Yongming SU Lin ZHANG Weiguo LIU Thin Film and Optical Manufacturing Technology Key Laboratory of Ministry of EducationXi’an Technological UniversityXi’an 710032China Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringFaculty of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049China

Rare earth(RE=La^(3+),Sm^(3+),Pr^(3+))ion doped Pb(Mgi/3Nb2/3)O3-PbTi03(RE-PMN-PT)ferroelectric thin films with compositions near the morphotropic phase boundary were grown on the Pt/TiO_(2)/S i02/Si(100)substrate using sol-gel/spin coating *** phase structure,electrical properties,and photoluminescence performance of thin films were investigated *** highly(100)-preferred orientation was obtained in pure perovskite Sm-PMN-0.30PT thin films with an average grain size of 131 *** 2.5%Sm^(3+)doping,the PMN-0.30PT thin films exhibited a triple enhancement of dielectric permittivity with a maximum value of 3500 at 1 kHz,a low dielectric loss of 1.3%,and high remanent polarization of 17.5μC/cm^(2)at room *** visible light and near-infrared band,the transmittance rate increased with PT content and showed the highest value of 85%in 2.5%*** addition,the films presented strong red-orange emission at 599 nm,which was sensitively in temperature range of 248-273 K corresponding to the rhombohedral to monoclinic phase transition temperature.

关键词： PMN-PT rare earth doping dielectric ferroelectric photoluminescence

On the possibility to determine neutrino mass hierarchy via supernova neutrinos with short-time characteristics

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Chinese Physics C 2019年第9期43卷 108-122页

作者： Junji Jia Yaoguang Wang shun zhou School of Physics and Technology Wuhan UniversityWuhan 430072China Center for Theoretical Physics Wuhan UniversityWuhan 430072China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Center for High Energy Physics Peking UniversityBeijing 100871China

In this paper, we investigate whether it is possible to determine the neutrino mass hierarchy via a high-statistics and real-time observation of supernova neutrinos with short-time characteristics. The essential idea is to utilize distinct times-of-flight for different neutrino mass eigenstates from a core-collapse supernova to the Earth, which may significantly change the time distribution of neutrino events in the future huge water-Cherenkov and liquid-scintillator detectors. For illustration, we consider two different scenarios. The first case is the neutronization burst of emitted in the first tens of milliseconds of a core-collapse supernova, while the second case is the black hole formation during the accretion phase for which neutrino signals are expected to be abruptly terminated. In the latter scenario, it turns out only when the supernova is at a distance of a few Mpc and the fiducial mass of the detector is at the level of gigaton, might we be able to discriminate between normal and inverted neutrino mass hierarchies. In the former scenario, the probability for such a discrimination is even less due to a poor statistics.

关键词： neutrino mass hierarchy supernova neutrinos black holes

Transport of intensity diffraction tomography with non-interferometric synthetic aperture for three-dimensional label-free microscopy

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Light(Science & Applications) 2022年第10期11卷 2294-2307页

作者： Jiaji Li Ning zhou Jiasong Sun shun zhou Zhidong Bai Linpeng Lu Qian Chen Chao Zuo School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNo.200 Xiaolingwei StreetNanjingJiangsu Province 210094China Jiangsu Key Laboratory of Spectral Imaging&Intelligent Sense Nanjing University of Science and TechnologyNanjingJiangsu Province 210094China Smart Computational Imaging Laboratory(SCILab) Nanjing University of Science and TechnologyNanjingJiangsu Province 210094China

We present a new label-free three-dimensional(3D)microscopy technique,termed transport of intensity diffraction tomography with non-interferometric synthetic aperture(TIDT-NSA).Without resorting to interferometric detection,TIDT-NSA retrieves the 3D refractive index(RI)distribution of biological specimens from 3D intensity-only measurements at various illumination angles,allowing incoherent-diffraction-limited quantitative 3D phase-contrast *** unique combination of z-scanning the sample with illumination angle diversity in TIDT-NSA provides strong defocus phase contrast and better optical sectioning capabilities suitable for high-resolution tomography of thick biological *** on an off-the-shelf bright-field microscope with a programmable light-emitting-diode(LED)illumination source,TIDT-NSA achieves an imaging resolution of 206 nm laterally and 520 nm axially with a high-NA oil immersion *** validate the 3D RI tomographic imaging performance on various unlabeled fixed and live samples,including human breast cancer cell lines MCF-7,human hepatocyte carcinoma cell lines HepG2,mouse macrophage cell lines RAW 264.7,Caenorhabditis elegans(***),and live Henrietta Lacks(HeLa)*** results establish TIDT-NSA as a new non-interferometric approach to optical diffraction tomography and 3D label-free microscopy,permitting quantitative characterization of cell morphology and time-dependent subcellular changes for widespread biological and medical applications.

关键词： illumination intensity synthetic

Mobile Agents on Internet

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Wuhan University Journal of Natural Sciences 1998年第1期3卷 20-26页

作者： zhou, shun Zhu, Chunyan Ying, Shi Wuhan University State Key Lab of Software Engineering Wuhan China (GRID:grid.49470.3e) (ISNI:***)

Mobile agents is becoming a prosperous research field due to recent prevalence of Internet andJava. Although it brings great challenges to traditional distributed processing technologies, its attractive advantages stimulate us to further the work on it with great ardor. This paper presents the basic concepts aboutthe Inchoate technique and describes current research status on it. Major obstacles and their possible solutions are discussed.

关键词： agent mobile computing Internet distributed processing

Modeling sintering behavior of metal fibers with different fiber angles

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Rare Metals 2018年第10期37卷 886-893页

作者： Dong-Dong Chen zhou-shun Zheng Jian-Zhong Wang Hui-Ping Tang School of Mathematics and Statistics Central South University State Key Laboratory of Porous Metal Materials Northwest Institute for Nonferrous Metal Research

The formation of sintering necks between two metal fibers was investigated using the oval-oval model with respect to the fiber angle range of 0°-90°. Surface diffusion was assumed to be the predominant mechanism in every section of the junction of two metal fibers in this model, which was addressed numerically using the level- set method. The growth rates of the sintering necks in the direction of the bisector of obtuse angle, the bisector of acute angle and the fiber axis were discussed in detail. It is found that the growth rate of the sintering necks decreases with fiber angle increasing in the direction of the fiber axis and the bisector of acute angle. However, an opposite variation in growth rate of sintering necks can be found in the direction of the bisector of obtuse angle. The numerical simulation results show that the growth rate of the sintering necks is significantly affected by the initial local geomet- rical structure which is determined by the fiber angle.

关键词： Metal fiber Surface diffusion Fiber angle Initial local geometrical structure Initial evolution speed

Study on the Hydration and Physical Properties of Cement by M18 Polycarboxylate Superplasticizer Modified Graphene Oxide

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Journal of Renewable Materials 2023年第2期11卷 625-641页

作者： Dalong Liao Dongxu Li shun zhou Xiaotao Zhang Ying Fang College of Materials Science and Engineering Nanjing Tech UniversityNanjing211816China

Graphene oxide(GO)as a new nano-enhancer in cement-based materials has gained wide ***,GO is easy to aggregate in alkaline cement mortar with poor *** hinders its application in practical infrastructure *** this work,GO-M18 polycarboxylate compound superplasticizer(GM)were obtained by compounding the M18 polycarboxylate superplasticizer with GO solution at different mass *** dispersion of GM in alkaline solution was systematically *** phases and functional groups of GM were characterized by XRD and *** effects of GM on the cement mortar hydration and the formation of microstructure were investigated by measuring the heat of hydration,MIP,TG/DSC,and *** results show that the long-chain structure of the M18 polycarboxylate superplasticizer can increase the interlayer spacing of GO and weaken the force between GO *** modified GO can be uniformly dispersed in the cement *** can accelerate the early hydration process of cement,which can increase the content of Ca(OH)2 and decrease the grain *** can optimize the pore size distribution of cement-based materials,increase the density of harmless and less harmful pores,thereby improving mechanical *** methods can transform traditional cement-based materials into stronger,more durable composites,which prolong the life of cement-based materials and reduce the amount of cement used for later *** provides an idea for achieving sustainability goals in civil engineering.

关键词： Modified graphene oxide cement polycarboxylate superplasticizer hydration properties me-chanical performance