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将以下代码加入body中。$$<img src=“http:// www.cpcw. com/image/dnbLOGO1.jpg” b  (本文共1页) 阅读全文>>

权威出处: 电脑报2003/05/12
《Communications in Theoretical Physics》2020年04期
Communications in Theoretical Physics

Fringe visibility for two qubits interacting with a macroscopic medium

We study both the two-particle and single-particle fringe visibility in the generalized version of the Nakazato–Pascazio model where two qubits interact with a finite length one-dimensional array. Both the two-particle and single-particle fringe visibilities are investigated with different initial states of the particles spin. For differe...  (本文共8页) 阅读全文>>

《Science China Materials》2017年07期
Science China Materials

An international peer-reviewed journal for the materials research community

Reporting cutting-edge research in materials science Distinguished int...  (本文共1页) 阅读全文>>

《Chinese Science Bulletin》2014年24期
Chinese Science Bulletin

Spatiotemporal pattern and regional characteristics of visibility in China during 1976–2010

Degradation in visibility occurs extensively across China,creating the urgent need to better understand visibility patterns and characteristics in China.Using daily observation data from the U.S.National Climatic Data Center(NCDC)during 1976–2010,the spatial distribution and temporal trends of visibility in China,as well as seasonal and regional characteristics,were determined.The distribution of visibility was chara...  (本文共12页) 阅读全文>>

《Advances in Polar Science》2013年03期
Advances in Polar Science

Features of visibility variation at Great Wall Station,Antarctica

The variation of visibility at Great Wall Station(GWS)was analyzed using manual observational data for the period of1986 to 2012.Results show that the frequencies of occurrence of high(≥10 km)and low visibility(0-1 km)are 61.0%and8.0%,respectively.Visibility at GWS shows an evident seasonal variation:The highest visibility between November and March,and the lowest visibility from June to October.Sea fog and precipita...  (本文共6页) 阅读全文>>

《Science China(Information Sciences)》2010年11期
Science China(Information Sciences)

An improved line-of-sight method for visibility analysis in 3D complex landscapes

This paper presents an efficient method for implementing visibility analysis on complex landscapes based on an improved LOS (line of sight) algorithm. The method determines the viewshed by analyzing the geometric relationship between the target points and viewpoint. It differentiates the visibility of the target points by the elevation inf...  (本文共10页) 阅读全文>>