Major companies in the gas industry Japan 2023, by total assets|天然气行业数据集|公司资产数据集
收藏Dunhuang Grottoes Painting Dataset
该数据集专为敦煌石窟壁画修复而设计,提供了大量的训练和测试样本,足以支持深度学习方法的应用。
arXiv 收录
China Health and Nutrition Survey (CHNS)
China Health and Nutrition Survey(CHNS)是一项由美国北卡罗来纳大学人口中心与中国疾病预防控制中心营养与健康所合作开展的长期开放性队列研究项目,旨在评估国家和地方政府的健康、营养与家庭计划政策对人群健康和营养状况的影响,以及社会经济转型对居民健康行为和健康结果的作用。该调查覆盖中国15个省份和直辖市的约7200户家庭、超过30000名个体,采用多阶段随机抽样方法,收集了家庭、个体以及社区层面的详细数据,包括饮食、健康、经济和社会因素等信息。自2011年起,CHNS不断扩展,新增多个城市和省份,并持续完善纵向数据链接,为研究中国社会经济变化与健康营养的动态关系提供了重要的数据支持。
www.cpc.unc.edu 收录
鸭绿江流域与水系 – 世界地理数据大百科辞条
鸭绿江流域是指鸭绿江干流和支流汇水区,地理位置为39°43′57″N-42°17′28″N,123°35′59″E-128°45′50″E。与其接壤的流域分别是辽河流域(东)、松花江流域(北)、图们江流域(北)、大同江流域(西南)等。鸭绿江流域界线在中国境内从长白山天池火山口的南壁起始,向西南经长白山脉、转向西南至千山山脉的北部,再折向南入海;在朝鲜境内,鸭绿江流域从长白山天池南坡启始向东南经过摩天岭山脉,在头流山(2309 m)转向西南方向的赴战岭山脉,在英雄里附近转向西,经狼林山(2184 m)、广城、松源,转向西南方向的狄逾岭山脉,接江南山脉的南部后至鸭绿江河口。鸭绿江流域面积65215.49 km²,其中,中国境内面积32799.22 km²,朝鲜境内面积32416.27 km²。鸭绿江是中(国)朝(鲜)界河,它起源于长白山天池火山口的南壁,向南经惠山(朝)、折向西经临江(中)、再转向西南直向丹东(中)、新义州(朝),最后在东港(中)和多狮里(朝)附近注入黄海的西朝鲜湾。鸭绿江干流长844.98 km,有几条比较大的支流汇入,包括在朝鲜境内的虛川江、長津江、厚州川、慈城江、禿魯江、忠满江和三桥川;在中国境内的浑江、蒲石河、瑗河等。鸭绿江干流沿中朝国界线自东北向西南流经吉林省的长白朝鲜族自治县、临江市、集安市;辽宁省的桓仁满族自治县、宽甸满族自治县、丹东市和东港市;朝鲜的两江道、慈江道和平安北道。鸭绿江流域地处暖温带湿润季风气候区。年降水量800-1200 mm。流域内多山,最高海拔2745 m,河道比降比较大,达到0.0032,其中在中段可达到0.01。丰富的降水补给和较大的河床比降,使得鸭绿江流域成为亚洲单位面积水资源和水利资源最丰富的流域之一。近80年来,流域内先后建造了水丰水库(中、朝)、渭源水库(中、朝)、铁甲水库(中)、太平哨水库(中)、桓仁水库(中)、回龙山水库(中)、满丰湖水库(朝)、版平里水库(朝)、时中湖水库(朝)、狼林湖水库(朝)、长津湖水库(朝)、赴战湖水库(朝)、丰西湖水库等(朝)。数据文件包括鸭绿江干流、鸭绿江水系和鸭绿江流域地理信息系统数据文件组成。数据集以.kmz 和.shp格式存储,数据量43.8 MB(压缩为20.1 MB)。
国家对地观测科学数据中心 收录
Kaggle - Digit Recognizer
该数据集包含手写数字(0-9)的图像数据,用于训练和测试数字识别模型。数据集包括训练集和测试集,训练集包含42000个样本,每个样本是一个28x28像素的灰度图像,以及对应的标签。测试集包含28000个样本,用于评估模型的性能。
www.kaggle.com 收录
Population and Housing Census of 2007 - Ethiopia
Geographic coverage --------------------------- National coverage Analysis unit --------------------------- Household Person Housing unit Universe --------------------------- The census has counted people on dejure and defacto basis. The dejure population comprises all the persons who belong to a given area at a given time by virtue of usual residence, while under defacto approach people were counted as the residents of the place where they found. In the census, a person is said to be a usual resident of a household (and hence an area) if he/she has been residing in the household continuously for at least six months before the census day or intends to reside in the household for six months or longer. Thus, visitors are not included with the usual (dejure) population. Homeless persons were enumerated in the place where they spent the night on the enumeration day. The 2007 census counted foreign nationals who were residing in the city administration. On the other hand all Ethiopians living abroad were not counted. Kind of data --------------------------- Census/enumeration data [cen] Mode of data collection --------------------------- Face-to-face [f2f] Research instrument --------------------------- Two type sof questionnaires were used to collect census data: i) Short questionnaire ii) Long questionnaire Unlike the previous censuses, the contents of the short and long questionnaires were similar both for the urban and rural areas as well as for the entire city. But the short and the long questionnaires differ by the number of variables they contained. That is, the short questionnaire was used to collect basic data on population characteristics, such as population size, sex, age, language, ethnic group, religion, orphanhood and disability. Whereas the long questionnaire includes information on marital status, education, economic activity, migration, fertility, mortality, as well as housing stocks and conditions in addition to those questions contained in a short questionnaire.
catalog.ihsn.org 收录