基于不确定性原理的误差理论研究探讨     

杨久东  王涛  肖格 《测绘通报》2012,(Z1):151-153

误差是测量工作的必然事件,出现概率P=1.0,针对测量误差,研究建立不确定性分布函数作为误差向不确定度过渡的桥梁。  相似文献   

《测绘学报》论文入选中国百篇最具影响国内学术论文     

本刊编辑部 《测绘学报》2012,41(6):824

[本刊讯]2012年12月7日,中国科技期刊统计结果的权威发布机构——中国科学技术信息研究所在北京国际会议中心举行了2012年中国科技论文统计结果发布会,会上发布了中国科技论文统计结果"2011年中国百篇最具影响国内学术论文"。《测绘学报》2009年第4期刊登的中国测绘科学研究院章传银的《EGM2008地球重力场模型在中国大陆  相似文献   

《中国期刊引证报告（扩刊版）》2011年版部分测绘类期刊指标摘录     

《测绘学报》2012,41(3):416

《中国科技期刊引证报告（扩刊版）》,现名《中国期刊引证报告（扩刊版）》。它基本囊括了我国出版的学术技术类科学技术期刊和理论研究性社会科学期刊,全方位、完整地提供了我国期刊的评估数据。2011年版收录中国期刊6193种,测绘类期刊24种。以下是部分测绘类期刊的统计指标数据。  相似文献   

欢迎订阅2013年《北京测绘》     

《北京测绘》2012,(5):104

<正>《北京测绘》是北京市规划委员会主管,北京市测绘设计研究院、北京测绘学会联合主办的测绘地理信息科技综合性季刊。创刊于1987年,全国公开出版发行。《北京测绘》是中国学术期刊综合评价数据库统计源期刊。亦是《中国核心期刊(遴选)数据库》收录期刊。本刊是具有实用性、超前性、信息量大、特色鲜明,融科技、信息、生产为一体的科技刊物,不仅是广大测绘地理信息工作者的学习园地,而且是了解测绘地理信息科技发展与市场动态的窗口。本刊以科学技术是第一生产力为指导,以推动科学技术成果转化为生产  相似文献   

风云三号卫星微波成像仪在轨性能稳定性分析     

乔木  杨虎  何嘉恺  吕利清 《遥感学报》2012,16(6):1246-1261

利用地球冷目标观测亮温的稳定性和遥感数据统计直方图方法,是评价微波成像仪等类似微波成像辐射计在轨性能稳定性的有效方法。在此基础上,本文用2011年2月—7月风云三号02星微波成像仪在轨观测的亮温数据,对微波成像仪在轨运行的性能稳定性进行了分析。结果表明:风云三号02星微波成像仪在轨性能稳定,所有通道最低亮温参考值波动范围不超过1.8K。  相似文献   

湖南6月区域持续性暴雨的强信号及预报概念模型     

张超  罗伯良  彭莉莉  谢傲  李易芝 《湖北气象》2021,40(1)

基于湖南汛期区域持续性暴雨典型环流分型,利用1961—2016年NCEP/NCAR再分析资料和异常度方法对湖南6月区域持续性暴雨环流型进行客观识别,并结合动力和水汽输送条件,确定湖南6月区域持续性暴雨强信号并客观量化表征,建立湖南6月区域持续性暴雨预报定量化概念模型。结果表明:43次历史区域持续性暴雨过程的回报准确率达到81%,2017—2018年3次区域持续暴雨过程试报准确率为2/3,说明该概念模型有一定预报能力,能为湖南暴雨预报业务服务提供技术支持。将该概念模型与各类模式预报产品相结合,还可开展区域持续性暴雨的中期和延伸期预报。  相似文献   

Bimodality of the South Asia High simulated by coupled models     

周宁芳  俞永强  钱永甫 《大气科学进展》2009,26(6):1226-1234

The observed South Asia High (SAH) center is characterized by two distinctive equilibrium modes during boreal midsummer, namely the center of SAH is located between 82.5^o--92.5^oE for the Tibetan Plateau mode and between 55^o--65^oE for the Iranian Plateau mode, respectively. The present study describes the ability of 15 coupled general circulation models (CGCM) used in the Intergovernmental Panel on Climate Changes (IPCC) 4th Assessment Report to reproduce the observed bimodality of the SAH. These models reveal a wide range of skill in simulating this bimodality. Nearly half of the models reproduced the bimodality, while the other half of the models did not simulate well these two modes whereas usually preferring one mode. The models that reproduced the bimodality of the SAH present similar horizontal and vertical circulations as those features from the NCEP reanalysis data. The results from these models identify the warm characteristics of the SAH and indicate that these two modes have different dynamic and thermodynamic properties. Different characteristics of the simulated sensible heat and latent heat related to precipitation partly contribute to the difference in the simulations of the SAH bimodality. The majority of these models that prefer to simulate the Tibetan Plateau mode produce a small sensible heat flux difference between the Iranian Plateau and the Tibetan Plateau, and also generally simulate a very strong false precipitation center over the east of the Tibetan Plateau, which indicates strong latent release and thereby contributes to the preference of the SAH center on the Tibetan Plateau. Whereas, the models that reproduce the bimodality of the SAH tend to simulate large precipitation over the southern Himalayas and no obviously false precipitation is produced over the east of the Tibetan Plateau. In addition, the models resolution may also have important impacts on the simulations of precipitation.  相似文献   

Numerical study of flow and gas diffusion in the near-wake behind an isolated building     

Mohamed F. YASSIN 《大气科学进展》2009,26(6):1241-1252

To assist validation of the experimental data of urban pollution dispersion, the effect of an isolated building on the flow and gaseous diffusion in the wake region have been investigated numerically in the neutrally stratified rough-walled turbulent boundary layer. Numerical studies were carried out using Computational Fluid Dynamics (CFD) models. The CFD models used for the simulation were based on the steady-state Reynolds-Average Navier-Stoke equations (RANS) with κ-ε turbulence models; standard κ-ε and RNG κ-ε models. Inlet conditions and boundary conditions were specified numerically to the best information available for each fluid modeling simulation. A gas pollutant was emitted from a point source within the recirculation cavity behind the building model. The accuracy of these simulations was examined by comparing the predicted results with wind tunnel experimental data. It was confirmed that simulation using the model accurately reproduces the velocity and concentration diffusion fields with a fine-mish resolution in the near wake region. Results indicated that there is a good agreement between the numerical simulation and the wind tunnel experiment for both wind flow and concentration diffusion. The results of this work can help to improve the understanding of mechanisms of and simulation of pollutant transport in an urban environment.  相似文献   

利用OSSMO2004软件快速统计测报质量     

高娟 《陕西气象》2009,(6):49-49

使用OSSMO2004软件统计测报质量,可以快速完成月质量统计,且保证统计质量准确无误,大大提高工作效率。  相似文献   

STUDY OF THE EFFECTS OF REDUCING SYSTEMATIC ERRORS ON MONTHLY REGIONAL CLIMATE DYNAMICAL FORECAST     

曾新民  席朝笠 《热带气象学报(英文版)》2009,15(1):102-105

A nested-model system is constructed by embedding the regional climate model RegCM3 into a general circulation model for monthly-scale regional climate forecast over East China. The systematic errors are formulated for the region on the basis of 10-yr (1991-2000) results of the nested-model system, and of the datasets of the Climate Prediction Center (CPC) Merged Analysis of Precipitation (CMAP) and the temperature analysis of the National Meteorological Center (NMC), U.S.A., which are then used for correcting the original forecast by the system for the period 2001-2005. After the assessment of the original and corrected forecasts for monthly precipitation and surface air temperature, it is found that the corrected forecast is apparently better than the original, suggesting that the approach can be applied for improving monthly-scale regional climate dynamical forecast.  相似文献