4篇
您的检索式：作者名="Tianhua Ni"
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| 1 | Nicotine dependence and its familial aggregation in Chinese显示文摘 | Tianhua Niu Changzhong Chen Jiatong Ni | 2000 | International Journal of Epidemiology2000，29，2： | 1 |
| 2 | Non-carcinogenic risk assessment of eight metals in the source groundwater of Shaying River Basin显示文摘 | Ni Tianhua Diao Weiping Xu Jiangang | 2011 | Ecotoxicology2011，20，5： | 1 |
| 3 | An investigation of the visual features of urban street vitality using a convolutional neural network显示文摘As a well-known urban landscape concept to describe urban space quality,urban street vitality is a subjective human perception of the urban environment but difficult to evaluate directly from the physical space.The study utilized a modern machine learning computer vision algorithm in the urban build environment to simulate the process,which starts with the visual perception of the urban street landscape and ends with the human reaction to street vitality.By analyzing the optimized trained model,we tried to identify urban street vitality’s visual features and evaluate their importance.A region around the Mochou Lake in Nanjing,China,was set as our study area.Seven investigators surveyed the area,recorded their evaluation score on each site’s vitality level with a corresponding picture taken on site.A total of 370 pictures and recorded score pairs from 231 valid survey sites were used to train a convolutional neural network.After optimization,a deep neural network model with 43 layers,including 11 convolutional ones,was created.Heat maps were then used to identify the features which lead to high vitality score outputs.The spatial distributions of different types of feature entities were also analyzed to help identify the spatial effects.The study found that visual features,including human,construction site,shop front,and roadside/walking pavement,are vital ones that correspond to the vitality of the urban street.The consistency of these critical features with traditional urban vitality features indicates the model had learned useful knowledge from the training process.Applying the trained model in urban planning practices can help to improve the city environment for better attraction of residents’activities and communications. | Yi Qi Sonam Chodron Drolma Xiang Zhang Jing Liang Haibing Jiang Jiangang Xu Tianhua Ni | 2020 | Geo-Spatial Information Science2020，23，4： | 1 |
| 4 | Study on Water Pollution Control of Huaihe River and Countermeasures显示文摘Huaihe 河是有一张大人口的中国的三条主要的河之一并且开发经济。由 1970 年代, Huaihe 河的水质量每天并且非常正在败坏水质量的 100 个严肃的污染事故发生了并且沿着河并且可怕地在居民的生产,生活和健康引起了无法估计的损失损坏了河的生态的系统。通过为超过 10 年的连续大规模处理, Huaihe 河里的水质量的恶化基本上被禁止了。不过, Huaihe 河里的水污染是总体上,为许多原因仍然很严肃包括特殊气候的条件,为河的水资源,过时的工业结构和腐烂的管理系统的可怕的缺乏,等等。这篇散文深深地分析 Huaihe 河的水污染是“长期”的并且提出为怎么连续地改进河的水质量的相应反措施的原因。最后,就算每项措施顺利被实现并且严格地,清洗实际上做 Huaihe 河的水并且逐渐地恢复它的正常生态、环境的功能,这篇散文主张它仍然花 30-50 年或甚至一个更长的时期。 | Ni Tianhua Sun Ping Xu Jiangang Diao Weiping | 2010 | China Standardization2010，55，6： | 0 |
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