This paper is to examine the impact of satellite data on the systematic error of operational B-model in China.Em- phasis is put on the study of the impact of satellite sounding data on forecasts of the sea level press...This paper is to examine the impact of satellite data on the systematic error of operational B-model in China.Em- phasis is put on the study of the impact of satellite sounding data on forecasts of the sea level pressure field and 500 hPa height.The major findings are as follows. (1)The B-model usually underforecasts the strength of features in the sea level pressure(SLP)field,i.e.pressures are too low near high pressure systems and too high near low pressure systems. (2)The nature of the systematic errors found in the 500 hPa height forecasts is not as clear cut as that of the SLP forecasts,but most often the same type of pattern is seen,i.e.,the heights in troughs are not low enough and those in ridges are not high enough. (3)The use of satellite data in the B-model analysis/forecast system is found to have an impact upon the model's forecast of SLP and 500 hPa height.Systematic errors in the vicinity of surface lows/500 hPa troughs over the oceans are usually found to be significantly reduced.A less conclusive mix of positive and negative impacts was found for all other types of features.展开更多
梳理国外知识隐藏相关文献,揭示知识隐藏的影响因素。基于Web of Science数据库,获取紧密相关的159篇文献,采用内容分析法,从能力、机会、动机、行为等4个方面归纳知识隐藏的研究内容。研究结果发现:知识隐藏行为受到能力因素、机会因...梳理国外知识隐藏相关文献,揭示知识隐藏的影响因素。基于Web of Science数据库,获取紧密相关的159篇文献,采用内容分析法,从能力、机会、动机、行为等4个方面归纳知识隐藏的研究内容。研究结果发现:知识隐藏行为受到能力因素、机会因素、动机因素等的影响,符合COM-B模型的规律;促进知识隐藏的关键环境因素主要包括环境压力、负面关系等;抑制知识隐藏的环境因素主要包括支持性环境、心理保障、积极动机等。研究结果证实COM-B模型可用于分析知识隐藏的行为轨迹,并提出实践启示及未来研究启示。展开更多
智慧交通行业具有综合性、系统性、数据驱动、服务智能化、安全性和环保性等特点,对相关企业进行价值评估可以为投资决策提供参考、为资产配置提供依据、为相关企业的并购重组提供指导、明确业务发展的方向等。在进行企业价值评估时,重...智慧交通行业具有综合性、系统性、数据驱动、服务智能化、安全性和环保性等特点,对相关企业进行价值评估可以为投资决策提供参考、为资产配置提供依据、为相关企业的并购重组提供指导、明确业务发展的方向等。在进行企业价值评估时,重要的是考虑当前实际情况,相应地调整使用的参数,选择恰当的评估方法,确保评估数据反映最新的市场动态和企业经营状况。文章以qf科技为例,使用灰色预测模型GM(1,1)对qf科技企业的未来自由现金流加以预测,通过DCF模型和经过蒙特卡洛模拟(Monte Carlo Simulation)改进后的DCF模型对qf科技企业价值进行评估,最终结果显示:通过蒙特卡洛模拟(Monte Carlo Simulation)改进后的模型评估企业价值更加合理。展开更多
文摘This paper is to examine the impact of satellite data on the systematic error of operational B-model in China.Em- phasis is put on the study of the impact of satellite sounding data on forecasts of the sea level pressure field and 500 hPa height.The major findings are as follows. (1)The B-model usually underforecasts the strength of features in the sea level pressure(SLP)field,i.e.pressures are too low near high pressure systems and too high near low pressure systems. (2)The nature of the systematic errors found in the 500 hPa height forecasts is not as clear cut as that of the SLP forecasts,but most often the same type of pattern is seen,i.e.,the heights in troughs are not low enough and those in ridges are not high enough. (3)The use of satellite data in the B-model analysis/forecast system is found to have an impact upon the model's forecast of SLP and 500 hPa height.Systematic errors in the vicinity of surface lows/500 hPa troughs over the oceans are usually found to be significantly reduced.A less conclusive mix of positive and negative impacts was found for all other types of features.
文摘梳理国外知识隐藏相关文献,揭示知识隐藏的影响因素。基于Web of Science数据库,获取紧密相关的159篇文献,采用内容分析法,从能力、机会、动机、行为等4个方面归纳知识隐藏的研究内容。研究结果发现:知识隐藏行为受到能力因素、机会因素、动机因素等的影响,符合COM-B模型的规律;促进知识隐藏的关键环境因素主要包括环境压力、负面关系等;抑制知识隐藏的环境因素主要包括支持性环境、心理保障、积极动机等。研究结果证实COM-B模型可用于分析知识隐藏的行为轨迹,并提出实践启示及未来研究启示。
文摘智慧交通行业具有综合性、系统性、数据驱动、服务智能化、安全性和环保性等特点,对相关企业进行价值评估可以为投资决策提供参考、为资产配置提供依据、为相关企业的并购重组提供指导、明确业务发展的方向等。在进行企业价值评估时,重要的是考虑当前实际情况,相应地调整使用的参数,选择恰当的评估方法,确保评估数据反映最新的市场动态和企业经营状况。文章以qf科技为例,使用灰色预测模型GM(1,1)对qf科技企业的未来自由现金流加以预测,通过DCF模型和经过蒙特卡洛模拟(Monte Carlo Simulation)改进后的DCF模型对qf科技企业价值进行评估,最终结果显示:通过蒙特卡洛模拟(Monte Carlo Simulation)改进后的模型评估企业价值更加合理。
