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正专家简介:王浩,63岁,水文水资源专家,2005年当选为中国工程院院士。出生于北京市,1989年毕业于清华大学,获博士学位。曾任中国自然资源学会副理事长,现任中国水利水电科学研究院水资源研究所所长、教授级高级工程师。曾获国家科技进步二等奖三次,省部级科技进步奖四次,中国优秀图书奖一次。 相似文献
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株洲与湘潭城市核心竞争力比较分析 总被引:4,自引:0,他引:4
通过对区域性中等城市株洲和湘潭的主要经济指标对比并进行优势分析,借助建立的数学模型对有关指标进行定量研究.结果表明,株洲的工业竞争力和湘潭的文化教育竞争力分别是两市的核心竞争力,并依此提出两市发挥城市的各自优势,注重城市的功能整合的建议,以更好地促进长株潭区域经济的可持续发展. 相似文献
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为了解决由于空间分辨率低导致城市核心地物要素提取精度低的问题,笔者构建了适用于城市核心地物要素提取的卷积神经网络模型(convolutional neural network, CNNs),同时利用基于遥感影像提取的颜色、纹理和形状等多特征信息辅助城市地物要素提取。颜色、纹理和形状等多特征信息与CNNs模型提取的深层信息相结合,融合浅层与深层特征信息,充分挖掘影像数据中的高级语义信息,能够有效地提高结果精度。实验结果表明,CNNs模型减少了模型参数量与复杂度,模型收敛速度快,具有较高的提取精度、泛化能力和鲁棒性,总体精度为97.49%,Kappa系数为0.957 5。该研究可以为城市发展与规划提供技术支持。 相似文献
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Private Car Travel Characteristics and Influencing Factors in Chinese Cities ——A Case Study of Guangzhou in Guangdong, China 总被引:5,自引:0,他引:5
Taking Guangzhou as a case, this paper adopted a questionnaire survey to gather first-hand data and analyzed the characteristics
and influencing factors of private car travel in Chinese cities. As the research indicated, trip purposes of private car travel
are mainly commute and business affairs with a more flexible trip in the urban core area. And trip intensities are concentrated
in a certain extent, with trip frequency being lower in the urban core area than the peripheral area. In addition, the trip
time has two significant peaks occurring in the morning and afternoon, and one trough in the midday. And trip spatial distribution
is mainly within commute with both residence and employment in urban area and inward commute with residence in suburban area
while employment in urban area. Both kinds of commutes direct to the urban area. The study also shows that the characteristics
of private car travel are principally influenced by two aspects: travelers’ attributes and urban characteristics. The main
travelers’ social and economic attributes influenced it include the gender, education attainment, age, driving experience
and per capita monthly household income. The urban characteristics influenced it mainly cover the land use pattern, public
traffic facilities and spatial attributes of residential environment. 相似文献
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