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| 1 | Analysis of observations on the urban surface energy balance in Beijing显示文摘1 年(20092010 ) 大小从在一个 325-m 塔的三垂直的层位于闹市区北京的传感器获得的城市的表面精力平衡(SEB ) 被分析。结果显示出那:(1 ) 从 325-m 塔的大小代表位于半潮湿的温暖适度的大陆人季风气候地区的城市的 SEB 特征。在典型热、多雨的夏天,感冒和干燥冬季,测量鲍恩比率在冬季在夏天和最大值是最小的。在 140 m 测量春天,夏天,秋天,和冬季的鲍恩比率分别地是 2.86, 0.82, 1.17,和 4.16。(2 ) 在 140-m 的高度(在经常的流动层) ,中午反照率是 0.10 夏天, 0.12 为春天和秋天,并且 0.14 为冬季。白天的比率理智的热流动,潜伏的热流动,和捕捞放射的存储热流动是 0.25, 0.16,和 0.59 清楚天空的天,并且 0.33, 0.19,和 0.48 为多云的天分别地。(3 ) 在清楚天空的天下面,夜间理智的热流动是几乎零,但是潜伏的热流动比零大。为多云的天,夜间理智的热流动比在冬季的潜伏的热流动稍微大。向上的热流动是的夜间大概由于人为的版本(为夏天的主要潜伏的热,当时为冬季的潜伏、理智的热) 。 | MIAO ShiGuang DOU JunXia CHEN Fei LI Ju LI AiGuo | 2012 | Science China Earth Sciences2012，55，11： | 23 |
| 2 | Symbolic algorithmic verification of intransitive generalized noninterference显示文摘Generalized noninterference can be used to formulate transitive security policies,but is unsuitable for intransitive security policies.We propose a new information flow security property,which we call intransitive generalized noninterference,that enables intransitive security policies to be specified formally.Next,we propose an algorithmic verification technique to check intransitive generalized noninterference.Our technique is based on the search for counterexamples and on the window induction proof,and can be used to verify generalized noninterference.We further demonstrate that the search of counterexamples and induction proof can be reduced to quantified Boolean satisfiability.This reduction enables us to use efficient quantified Boolean decision procedures to perform the check of intransitive generalized noninterference.It also reduces spatial requirement by representing the space compactly,and improves the efficiency of the verification procedure. | ZHOU CongHua LIU ZhiFeng WU HaiLing CHEN Song JU ShiGuang | 2012 | Science China(Information Sciences)2012，55，7： | 2 |
| 3 | Advances in Urban Meteorological Research in China显示文摘Over the past decades,a large number of studies have been carried out in the field of urban meteorology in China.This paper summarizes the main progress in urban meteorology research from four aspects:urban meteorological observation network and field campaign,multi-scale model of urban meteorology,interaction between urban meteorology and atmospheric environment,and the impacts of urbanization on weather and climate.Major advances are as follows.China’s major cities have established or are improving comprehensive urban meteorological observation networks characterized by multi-platform,multi-variable,multi-scale,multi-link,and multi-function.Beijing,Nanjing,Shanghai,and other cities carried out urban meteorological field campaigns,which were included in the WMO research demonstration project.Wind tunnel experiments and scale-model outdoor experiments were successfully conducted.Multi-scale urban meteorological and air quality prediction numerical model systems have been developed and put into operational use.The urban heat island effect;urban impacts on precipitation,regional climate,and air quality;urban planning;and interaction between urban meteorology and atmospheric environment are extensively investigated.Finally,efforts to improve observational technology,data assimilation,and urban system modeling,to explore the impacts of urbanization on environment and human health,and to provide integrated urban hydro-meteorological climate and environmental services are planned ahead. | Shiguang MIAO Weimei JIANG Ping LIANG Hongnian LIU Xuemei WANG Jianguo TAN Ning ZHANG Ju LI Wupeng DU Lin PEI | 2020 | Journal of Meteorological Research2020，34，2： | 2 |
| 4 | Challenges in Chinese text similarity research显示文摘 | Wang Xiuhong Ju Shiguang Wu Shengli | 2008 | International Symposiums on Information Processing Moscow Russia2008，2008，： | 1 |
| 5 | Multilevel security model for ad hoc networks显示文摘Modern battlefield doctrine is based on mobility, flexibility, and rapid response to changing situations. As is well known, mobile ad hoc network systems are among the best utilities for battlefield activity. Although much research has been done on secure routing, security issues have largely been ignored in applying mobile ad hoc network theory to computer technology. An ad hoc network is usually assumed to be homogeneous, which is an irrational assumption for armies. It is clear that soldiers, commanders, and commanders-in-chief should have different security levels and computation powers as they have access to asymmetric resources. Imitating basic military rank levels in battlefield situations, how multilevel security can be introduced into ad hoc networks is indicated, thereby controlling restricted classified information flows among nodes that have different security levels. | Wang Changda Ju Shiguang | 2008 | Journal of Systems Engineering and Electronics2008，19，2： | 1 |
| 6 | Impact of the Complex Terrain in Beijing on Formation of Low-Level Jets显示文摘This study investigated how the Taihang Mountains and the Yanshan Mountains affect low-level jets(LLJs)in the Beijing area,based on conventional radiosonde observations from Nanjiao Observatory(2016–2017)and high-resolution Weather Research and Forecasting–Advanced Research WRF(WRF-ARW)model simulations.Analysis of radiosonde observations indicated that LLJs in the study area are mainly from the southwest and northwest directions,with occurrence frequency of 44.6%and 33.0%,respectively.Southwest(northwest)LLJs are aligned parallel(perpendicular)to the orientation of the Taihang Mountain Range.Terrain sensitivity experiments using the WRF-ARW model were then conducted to examine the effects of terrain forcing on the northwest and southwest LLJs,with adopted terrain heights of 100%and 50%.The results showed that for northwest LLJs,reduction in the elevation of the Taihang Mountain Range led to weakening of jet intensity by approximately 20%and reduction in jet maximum height by approximately 250 m;lowering the Yanshan Mountain Range had minor influence on the northwest LLJs,with only a 5.2%reduction in intensity and no substantial change in jet maximum height.For southwest LLJs,reduction in the elevation of both the Taihang and Yanshan Mountain ranges resulted in minor changes in the intensity and height of the jets.Further analysis revealed that the topography in the Beijing area could modulate the height and intensity of the stable layer by altering the inversion structure within the boundary layer.The LLJs can develop rapidly within the stable layer,and both the location and the scale of the jet core exhibited reasonable agreement with the extent of the stable layer. | Li’ao ZHOU Chenggang WANG Shiguang MIAO Ju LI | 2024 | Journal of Meteorological Research2024，38，1： | 0 |
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