共查询到20条相似文献，搜索用时 31 毫秒
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《地理学报》1964,(4)
MI0HeKOTOphlxde口kHH口CTHx KamMmahHTdHNnx CBn3uC npol】3B*工C了B口MX月e口HUx KylbTyp……”……·………… ,………………………………………………………………………………………q—yK9-*一H(1)O oppMllpOBSH。Ill,p33DllTllll,BH}TpeHH6ll C’TpyKT\卜 C。JbCKOXO3RllCTBeHHhiX p3llOHOB 11O CllCT6AI6 H。 no叩O3〕。1。0。,。………、。··,…·,,…·,…………………………………………………………·qmoy刀门-IUIH(ZZ)*3}”**mle*O口卜***RM hoo**叩口l《*01081me9l****UIu03门叫。u]m门… 相似文献
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《地理学报(英文版)》1964,(4)
MI0HeKOTOphlxde口kHH口CTHx KamMmahHTdHNnx CBn3uC npol】3B*工C了B口MX月e口HUx KylbTyp……”……·………… ,………………………………………………………………………………………q—yK9-*一H(1)O oppMllpOBSH。Ill,p33DllTllll,BH}TpeHH6ll C’TpyKT\卜 C。JbCKOXO3RllCTBeHHhiX p3llOHOB 11O CllCT6AI6 H。 no叩O3〕。1。0。,。………、。··,…·,,…·,…………………………………………………………·qmoy刀门-IUIH(ZZ)*3}”**mle*O口卜***RM hoo**叩口l《*01081me9l****UIu03门叫。u]m门… 相似文献
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《The Professional geographer》2013,65(3):237-239
This study compares how humans and neural networks classify climate types. Human subjects were asked to classify climates from monthly temperature and precipitation patterns. To model their learning process, the same data were used to produce input vectors that trained a pattern associator neural network. Both human subjects and the neural network classified climates accurately after 10 rounds of supervised learning. The neural network successfully modeled the rate of human learning and the ability to learn specific climate categories. Moreover, the neural network weights used to classify climates correspond to distinct visual characteristics in temperature and precipitation. These results suggest that neural networks can model the formation of visual categories. 相似文献
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PAUL MATHER 《International journal of geographical information science》2013,27(2):258-259
As they increase in popularity, social media are regarded as important sources of information on geographical phenomena. Studies have also shown that people rely on social media to communicate during disasters and emergency situation, and that the exchanged messages can be used to get an insight into the situation. Spatial data mining techniques are one way to extract relevant information from social media. In this article, our aim is to contribute to this field by investigating how graph clustering can be applied to support the detection of geo-located communities in Twitter in disaster situations. For this purpose, we have enhanced the fast-greedy optimization of modularity (FGM) clustering algorithm with semantic similarity so that it can deal with the complex social graphs extracted from Twitter. Then, we have coupled the enhanced FGM with the varied density-based spatial clustering of applications with noise spatial clustering algorithm to obtain spatial clusters at different temporal snapshots. The method was experimented with a case study on typhoon Haiyan in the Philippines, and Twitter’s different interaction modes were compared to create the graph of users and to detect communities. The experiments show that communities that are relevant to identify areas where disaster-related incidents were reported can be extracted, and that the enhanced algorithm outperforms the generic one in this task. 相似文献
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《地理学报(英文版)》1965,(1)
为了发展我国西北干旱地区的经济,解放以来,有关部门首先后组织了很多综合性和专门性的考察,这些工作对于了解干旱区的自然特征和经济特征起了很大作用,并为今后进一步的研究奠定了基础。 相似文献
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《地理学报(英文版)》1965,(1)
化学地理是一门新科学,在我国的发展历史还很短,在1960年以前只有个别的机构、少数几个人从事这方面的工作,个别的高等学校开设这方面的课程,1960年以后由于学会的号召,在我国的地理研究机构和高等学校地理系中较广泛的开展了化学地理的研究和教学工作。干部队伍迅速在成长,研究领域逐渐在扩大,到目前为止从事化学地理工作 相似文献
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Dr. D. B. Prior R. M. Eve 《Geografisk tidskrift / udgivet af Bestyrelsen for Det Kongelige danske geografiske selskab》2013,113(1):12-17
Prior, D. D. &; Eve, R. M. 1975: Coastal landslide morphology at Røsnæs, Denmark. Geografisk Tidsskrift 74: 12–20. København, Juni, 1, 1975. Based on the field studies the coastal landslide morphology and the moss movement types in the Røsnæs area are described and classified, followed by a general discussion of the factors which promote slope instability. 相似文献