WorldView-2影像的水深探测能力

以中国南海东岛周边海域为研究区域,利用波段组合法开展高分辨WorldView-2影像的水深探测能力研究,分别建立单波段、双波段和多波段模型,进行精度评价。结果表明：多波段模型反演效果最好,双波段次之,单波段最差;各波段水深探测能力比较：绿波段 >全色波段 >蓝波段 >红波段;前视影像比后视影像的水深反演精度略高,全色波段在水深探测中具有重要作用。     

单源三站外辐射源雷达目标探测性能

论述全向外辐射源雷达空中目标探测系统的主要问题及系统体制损失。针对单源单站（SISO）和单源三站（SITO）两种工作方式,在接收天线阵元数相同的情况下分析探测距离和定位精度。在单源三站条件下推导直角坐标系中的目标速度矢量表达式,并分析速度测量精度。研究结果表明,在一定条件下,单源三站组网方式的空间覆盖范围与单源单站相当,且具有平面定位精度较高,可获得目标速度矢量和技术实现难度小的特点。     

Mapping cultural assets and evaluating significance: theory,methodology and practice

Over the last decade in the UK, there has been a notable shift in the popularity and use of cultural mapping as a methodology for policy making at a regional and local level. This follows increased demand for an informed framework for planning arts and cultural facilities from local and regional government and from within the cultural sector (Evans, 2008: p. 65). The article begins with an exploration of cultural mapping within cultural policy, which explores the context for the growth in this area of activity, and why this kind of activity appeals to policy makers and organisations. It then goes on to examine four cultural mapping exercises which have been undertaken in recent years in the UK. These studies have been chosen because although they all focus the mapping of cultural assets within a specific geographic area, they differ to one degree or another in purpose, context, definition, geographic scale and methodology. They illustrate the narrow range of approaches deployed in the cultural mapping field in the UK, and as such provide a useful means of critically reviewing their limits as well as highlighting the issues and challenges faced by cultural cartography in practice. The article concludes by considering the type of mapping research that is “allowed” within the discursive confines of consultancy based cultural policy research.     

繁荣背后的冷思考:论武侠影视对中国武术传播的影响

采用文献资料法、逻辑分析法等研究方法,深入剖析了影视媒介对中国武术传播的影响.研究认为:武侠影视作为传播中国武术的一种方式,一方面它向世界展现了中国武术的博大精深,形成新型的武侠影视产业,促进了中国武术的传播;另一方面,武侠影视在传播中国武术的过程中,给中国武术披上了神秘的外衣,使武术出现内容肤浅和文化内涵缺失等现象,以致于造成对中国武术的误读.     

追问与省思：面子心理导向下的中国武术发展研究

摘要：国民文化心态综合体现着中华文明的印记与传统文化的培塑,是一种对自己本民族文化与价值观念所持有的总体态度,容易受到社会心理导向的干预,进而对国民文化认知产生影响。主要运用文献资料法,从家族面子与武术的“入奥”追求,他人面子与武术“能打”的证明以及自我面子与武术的“优越”情结3个层面,探讨了当前中国武术的发展问题。研究认为：不可兼容的中西文化差异,特殊的国民文化心态以及不全面的武术本土化认知,导致中国武术在对“自我认知”与“他者认知”的时候出现误区。在此基础上,提出：要实现中国武术的体面发展应该坚守文化自觉的主张,加快武术现代化转型;树立文化自信的观念,摆正武术的文化姿态;培育自尊自强的国民心态,确保武术的理性发展。惟其如此,才能从更全面、更客观的视角看待武术、发展武术。     

基于深度学习的SSD模型尾矿库自动提取

针对华北地区尾矿库自动提取问题,将基于深度学习的SSD目标检测模型应用于遥感图像尾矿库提取。首先标记华北地区2 000个样本,随机挑选1 500个作为训练样本,剩余样本作为测试样本,验证模型的检测精度。分析卷积层对应感受野与图像中尾矿库尺寸关系,发现原始SSD模型漏检误检大型尾矿库。改进SSD模型结构,提出增加额外卷积层的策略,提高对大型尾矿库目标的检测精度。实验表明,在置信度阈值为0.3时,改进的SSD模型相比原始模型,检测精确率提高10.0%,召回率提高14.4%,提高了大型尾矿库检测精度。验证了基于深度学习的SSD目标检测模型自动提取尾矿库的可行性以及改进算法的有效性。     

Understanding human influence on climate change in China

China''s climate has been warming since the 1950s, with surface air temperature increasing at a rate higher than the global average. Changes in climate have exerted substantial impacts on water resources, agriculture, ecosystems and human health. Attributing past changes to causes provides a scientific foundation for national and international climate policies. Here, we review recent progress in attributing the observed climate changes over past decades in China. Anthropogenic forcings, dominated by greenhouse gas emissions, are the main drivers for observed increases in mean and extreme temperatures. Evidence of the effect of anthropogenic forcings on precipitation is emerging. Human influence has increased the probability of extreme heat events, and has likely changed the occurrence probabilities for some heavy precipitation events. The way a specific attribution question is posed and the conditions under which the question is addressed present persistent challenges for appropriately communicating attribution results to non-specialists.     

实物期权:我国中小企业信息化投资决策的必然选择

信息化是中小企业迎接新经济的挑战,提高企业运作效率、降低经营管理成本、把握新的商业机会的必由之路。但传统的投资决策方法无法根据信息化投资的特点来把握好投资的时机、方向、重点和结构。通过比较分析,认为实物期权方法作为一种动态评估方法,更能适应中小企业信息化投资特点。运用实物期权方法对中小企业信息化投资决策进行分析,可以突破传统决策分析方法的束缚,大大降低投资风险,增强投资的科学性。     

视频图像技术的发展及在田径项目训练中的应用

通过文献资料调研、计算机视频图像处理软件的实验应用开发,对图像处理技术在田径项目训练中的主要应用进行探讨,主要内容包括图像处理技术简介;图像处理技术应用到体育科研中的几项新技术出现及发展情况;在田径项目训练中的应用方法和手段,视频图像技术反馈运动实践的主要形式和效果;进行图像处理工作所需要的软硬件基本配置情况及应用的主要目标。预测图像处理技术今后将会在体育科研攻关和服务中得到广泛的应用。     

基于Action Script的校园可视化信息导航系统

在信息的表达中应用图片的直观性来快速表达信息,使用者能在短时间内接受更多的信息.通过采用Action Scrip语言设计一个校园可视化信息导航系统,通过采用不同种Action Scrip语言来实现系统的交互作用,实践证明该种导航系统能使使用者快速便捷地找到所需信息,效果良好.