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Search Results: 1 - 10 of 4699 matches for " Youhai Guan "
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Study on The Earthquake Disaster Reduction Information Management System and Its Application
Youhai Guan,Xudong Cheng,Yuan Zhang
International Journal of Intelligent Systems and Applications , 2011,
Abstract: It is significant to scientifically carry out the urban earthquake disaster reduction. According to the features of China urban earthquake disaster reduction, this paper designed the urban earthquake disaster reduction information management system, which proposed a system design idea, system composition and function structure. The system adopted the object-oriented language VB6.0 and the component set ArcGIS Engine provided by ESRI for development. We applied a variety of information techniques (GIS and database) for spatial information acquisition, analysis and computing, and drew up function modules corresponding to inquiry, spatial analysis, risk analysis and data management. By using this system we can achieve scientific management about the earthquake disaster information in storage and transportation engineering, draw up kinds of earthquake emergency decisions intellectually and make them visual, which improved the efficiency and velocity of earthquake emergency evidently, and assisted the decision-making system effectively for the earthquake emergency work .
Interannual and interdecadal variations in heat content of the upper ocean of the south china sea
Interannual and Interdecadal Variations in Heat Content of the Upper Ocean of the South China Sea

He Youhai,Guan Cuihua,Gan Zijun,
He Youhai
,Guan Cuihu,Gan Zijun

大气科学进展 , 1997,
Abstract: The vertically averaged temperature (TAV) from surface to 100 m depth of the South China Sea for the period 1959-1988 is analyzed. The results indicate that there is a significant long-term variability from interannual to interdecadal scales in the heat content in the upper ocean. The heat content of the upper ocean of the South China Sea increases evidently in the El Nino year. TAV anomaly in the ocean was negative from the end of 1950's to early 1970's, and then changed to positive. The changes of TAV of the ocean are closely related to ENSO events, the Asian winter monsoon and the tropical atmospheric circulation anomalies.
Interannual Variations of the Onset of the South China Sea Summer Monsoon and Low-Frequency Oscillation of Convective Activities in the Atmosphere
南海夏季风爆发与大气对流低频振荡的年际变化

He Youhai,Peng Chuming,Guan Cuihu,Lin Xigui,Wang Dongxiao,
何有海
,彭楚明,关翠华,林锡贵,王东晓

大气科学 , 2000,
Abstract: 根据1980~1991年云顶黑体温度(TBB)相位和强度的变化确定了南海夏季风爆发的时间,分析研究了夏季风爆发期间TBB场和850hPa风场的变化过程及其与海温的关系。结果表明:南海夏季风爆发平均时间是5月第4候,它爆发的时间和强度有显著的年际变化,并与大气的低频振荡及前期海洋的热力状况有密切关系。南海夏季风爆发早年(4月第6候),副热带高压较弱,撤离南海较快,从赤道东印度洋到赤道西太平洋,大气对流活动较强,夏季风爆发南海早于孟加拉湾,季风爆发时90~100°E区域过赤道气流显著加强。夏季风爆发晚年(6月第1候)情况相反。南海夏季风爆发早晚与大气30~60天振荡到达南海的位相有关,前冬和早春南海海温的高低和4月中旬至5月中南半岛强对流区的出现时间,是南海夏季风爆发年际变化的前期征兆。根据前冬南海海温预测1998年南海夏季风爆发的时间和强度与实际相符。
南海夏季风爆发与大气对流低频振荡的年际变化
何有海 He Youhai,彭楚明 Peng Chuming,关翠华 Guan Cuihua,林锡贵 Lin Xigui,王东晓 Wang Dongxiao
大气科学 , 2000, DOI: 10.3878/j.issn.1006-9895.2000.06.06
Abstract: 根据1980~1991年云顶黑体温度(TBB)相位和强度的变化确定了南海夏季风爆发的时间,分析研究了夏季风爆发期间TBB场和850hPa风场的变化过程及其与海温的关系。结果表明:南海夏季风爆发平均时间是5月第4候,它爆发的时间和强度有显著的年际变化,并与大气的低频振荡及前期海洋的热力状况有密切关系。南海夏季风爆发早年(4月第6候),副热带高压较弱,撤离南海较快,从赤道东印度洋到赤道西太平洋,大气对流活动较强,夏季风爆发南海早于孟加拉湾,季风爆发时90~100°E区域过赤道气流显著加强。夏季风爆发晚年(6月第1候)情况相反。南海夏季风爆发早晚与大气30~60天振荡到达南海的位相有关,前冬和早春南海海温的高低和4月中旬至5月中南半岛强对流区的出现时间,是南海夏季风爆发年际变化的前期征兆。根据前冬南海海温预测1998年南海夏季风爆发的时间和强度与实际相符。
SCREENING OF RAT GENOMIC LIBRARY WITH MINI-PLASMID
mini-质粒筛选大鼠基因组库

Xu Youhai,
徐幼海

生物化学与生物物理进展 , 1990,
Abstract: Two androgen related cDNA fragments were recloned into mini-plasmid AN7 (885bp) and then integrated into phage chromosome of lambda Charon 4A-rat liver genomic library by reciprocal recombination. The selected lambda DNA clones with the homologous sequence to the cDNAs were identified by genetic test and dot hybridization.
Adaptive Motion Segmentation for Changing Background  [PDF]
Yepeng Guan
Journal of Software Engineering and Applications (JSEA) , 2009, DOI: 10.4236/jsea.2009.22014
Abstract: Segmentation of moving objects efficiently from video sequence is very important for many applications. Background subtraction is a common method typically used to segment moving objects in image sequences taken from a statistic camera. Some existing algorithms cannot adapt to changing circumstances and require manual calibration in terms of specification of parameters or some hypotheses for changing background. An adaptive motion segmentation method is developed according to motion variation and chromatic characteristics, which prevents undesired corruption of the background model and does not consider the adaptation coefficient. RGB color space is selected instead of introducing complex color models to segment moving objects and suppress shadows. A color ratio for 4-connected neighbors of a pixel and multi-scale wavelet transformation are combined to suppress shadows. The mentioned approach is scene-independent and high correct segmentation. It has been shown that the approach is robust and efficient to detect moving objects by experiments.
Moved Score Confidence Intervals for Means of Discrete Distributions  [PDF]
Yu Guan
Open Journal of Statistics (OJS) , 2011, DOI: 10.4236/ojs.2011.12009
Abstract: Let X denote a discrete distribution as Poisson, binomial or negative binomial variable. The score confidence interval for the mean of X is obtained based on inverting the hypothesis test and the central limit theorem is discussed and recommended widely. But it has sharp downward spikes for small means. This paper proposes to move the score interval left a little (about 0.04 unit), called by moved score confidence interval. Numerical computation and Edgeworth expansion show that the moved score interval is analogous to the score interval completely and behaves better for moderate means; for small means the moved interval raises the infimum of the coverage probability and improves the sharp spikes significantly. Especially, it has unified explicit formulations to compute easily.
Ethnic Difference of Disease Prevalence in Rural China: Examples and Explanations  [PDF]
Ming Guan
Health (Health) , 2015, DOI: 10.4236/health.2015.74052
Abstract: Ethnic difference of disease prevalence has attracted great attentions in recent years in China, but few researches have summarized analysis available on ethnic difference of disease prevalence in rural China. The PubMed Central, Wiley Inter science, Science direct, Biomed central, CNKI and Springer-link were searched to identify studies published between January 1984 and October 2014 on ethnic inequality of health status in rural China. Distinct ethnic differences of disease prevalence exist in rural China. Results across disciplines put different explanations on the ethnic differences from ethnicity, infant feeding, and inequality in maternal health services utilization angles. The ethnic inequality of health status in rural China can be reduced by policy makers to allocate more resources towards health service in ethnic rural China.
A Strong Law of Large Numbers for Set-Valued Random Variables in Gα Space  [PDF]
Guan Li
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.37097
Abstract:

In this paper, we shall represent a strong law of large numbers (SLLN) for weighted sums of set- valued random variables in the sense of the Hausdorff metric dH, based on the result of single-valued random variable obtained by Taylor [1].

Study on Relativity between China’s Nominal GDP and the Shanghai Securities Composite Index  [PDF]
Dahong Guan
Journal of Service Science and Management (JSSM) , 2018, DOI: 10.4236/jssm.2018.115036
Abstract: By implementing X-11 process to eliminate the seasonal effect from the data of nominal GDP and Shanghai Securities Composite Index from 1996 to 2015, conducting co-integration test and Granger causality test on these processed data, and examining the leading characteristics of the securities index with the Lag regression model, the present thesis finally conducts a detailed analysis of the research results and puts forward some policy recommendations. The study suggests that there is a stable positive-correlating long-term relationship between Shanghai securities composite index and nominal GDP, the former being the Grainger causes for the latter, which mainly arises from the improvement in the institution of the stock market and the larger ratio of the stock market capitalization to that of nominal GDP. In addition, the increasing liquidity of long-term stock market and investors’ speculation to the stock market based on the national macro-control policies also elucidated the inherent property of Shanghai Composite Index as a leading indicator of Chinese Nominal GDP in the results presented.
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