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Production of neutron-rich exotic nuclei in projectile fragmentation at Fermi energies

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Nuclear Science and Techniques 2017年第2期28卷 18-23页

作者： R.Ogul N.Buyukcizmeci A.Ergun A.S.Botvina Department of Physics University of Selcuk ITP and Frankfurt Institute for Advanced Studies J.W.Goethe University Institute for Nuclear Research Russian Academy of Sciences

Isotopic fragment yields of projectile fragmentation in peripheral collisions of^(86)Kr on^(124;112)Sn and the mean neutron-to-proton ratios of the fragments are calculated, theoretically, within the ensemble approach of statistical multifragmentation model. Obtained data are compared to the experimental cross-section measurements for the projectile-like fragmentation in the reaction of 25 Me V/nucleon^(86)Kr+^(124;112)Sn at Texas A&M *** show the enhancement in the production of neutronrich isotopes close to the projectile as observed in the experiments. We also demonstrate the universality of the limitation of the excitation energy induced in the projectile residues.

关键词： Projectile fragmentation Peripheral collisions Isotope productions Universality

Principles and methods for the validation of quantitative remote sensing products

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Science China Earth Sciences 2010年第5期53卷 741-751页

作者： RenHua Zhang Jing Tian ZhaoLiang Li HongBo Su ShaoHui Chen XinZhai Tang Chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China

We first discuss the relativity of "true value and homogeneity" for quantitative remote sensing products (QRSPs), and then propose the definitions of "eigenaccuracy" and "eigenhomogeneity" under practical conditions. The eigenaccuracy and eigenhomogeneity for land surface crucial parameters such as albedo, leaf area index (LAI), and surface temperature are analyzed based on a series of experiments. Secondly, we point out the differences and similarities between the scale-free phenomena of the QRSPs and the measurements of the coastline length (1-dimensional) and the curved surface area (2-dimensional). An information fractal algorithm for the QRSPs is presented. In a case study for the LAI, when the fractal dimension is 2.16, the ratio of the LAI retrieval values obtained respectively from remote sensing data of 30 m and 6 km pixel resolution can actually reach as high as 2.86 for the same 6 km pixel using the same retrieval model. Finally, we propose an operational validation method "one test and two matches" and multipoint observation when the real situation does not allow carrying out scanning measurement without gap and overlap on the ground surface.

关键词： quantitative remote sensing productions (QRSPs) validation eigenaccuracy eigenhomogeneity scale-free phenomenon information fractal dimension scaling

Regional ozone pollution and key controlling factors of photochemical ozone production in Pearl River Delta during summer time

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Science China Chemistry 2010年第3期53卷 650-662页

作者： CHANG ChihChung CHOU C.K.Charles Andreas Wahner Research Center for Environmental Changes Academia SinicaTaipei 11529China Forschungszentrum Juelich ICG-Ⅱ:TroposphereJuelichGermany

An intensive field campaign including measurements from the environmental monitoring network and from two super sites took place in the Pearl River Delta region in summer *** routinely measured O3 and NOx concentrations,the spatial and temporal variation of O3 and of the total oxidant concentrations was *** to the spatial variability of NO2/NO,the two super sites were found to be representative of polluted urban and downwind suburban *** addition,both sites were located in high O3 ***-depth diagnostic of photochemical ozone production processes and their key controlling factors are achieved with an observation-based model(OBM) to gain regional *** analysis and sensitivity model runs show that aldehyde and HONO chemistry had significant impacts on local photochemical ozone production *** analysis of calculated Relative Incremental Reactivities shows that photochemical ozone production rates are mainly sensitive to anthropogenic hydrocarbons(HCs) in the polluted urban *** the suburban areas,sensitivity to nitrogen oxide(NO) concentrations *** anthropogenic HCs in both areas are alkenes and *** differences of ozone production efficiencies are identified between the urban and suburban regions,consistent with the OBM diagnosed results.

关键词： ozone Pearl River Delta photochemical ozone productions HONO relative incremental reactivity

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Overcoming Barriers

Beijing Review 2019年第36期62卷 32-33页

Oscar-nominated American writer-director duo Steven Bognar and Julia Reichert’s East-meets-West documentary American Factory, the first film produced by Barack and Michelle Obama's Higher Ground productions, puts the spotlight on Fuyao Glass America, the auto glass maker that bought General Motors' abandoned plant in Dayton, Ohio, and started its own factory there in 2015.

关键词： American productions plant