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收藏2020年中西亚30m Landsat TM/OLI土壤盐渍化分布数据集
该土壤盐渍化产品覆盖范围涵盖中亚五国、西亚土耳其、阿富汗及伊朗全境,该产品使用Landsat、SPOT数据遥感数据解译得到,其中大部分区域使用Landsat数据,部分重点监测区域采用SPOT数据进行补充,利用多源、多时相遥感影像,结合遥感参数、地形地貌和自然环境因子,采用面向对象的遥感分类方法,应用影像分割、决策树分类、变化监测等关键技术完成。该2020年30米空间分辨率数据可用于中西亚盐渍化时空变化分析及资源利用评估,可为农牧业、林业、环境保护、水资源保护、环境保护等政府相关部门的规划与管理提供基础信息。
地球大数据科学工程 收录
中国1km分辨率逐月降水量数据集(1901-2024)
该数据集为中国逐月降水量数据,空间分辨率为0.0083333°(约1km),时间为1901.1-2024.12。数据格式为NETCDF,即.nc格式。该数据集是根据CRU发布的全球0.5°气候数据集以及WorldClim发布的全球高分辨率气候数据集,通过Delta空间降尺度方案在中国降尺度生成的。并且,使用496个独立气象观测点数据进行验证,验证结果可信。本数据集包含的地理空间范围是全国主要陆地(包含港澳台地区),不含南海岛礁等区域。为了便于存储,数据均为int16型存于nc文件中,降水单位为0.1mm。 nc数据可使用ArcMAP软件打开制图; 并可用Matlab软件进行提取处理,Matlab发布了读入与存储nc文件的函数,读取函数为ncread,切换到nc文件存储文件夹,语句表达为:ncread (‘XXX.nc’,‘var’, [i j t],[leni lenj lent]),其中XXX.nc为文件名,为字符串需要’’;var是从XXX.nc中读取的变量名,为字符串需要’’;i、j、t分别为读取数据的起始行、列、时间,leni、lenj、lent i分别为在行、列、时间维度上读取的长度。这样,研究区内任何地区、任何时间段均可用此函数读取。Matlab的help里面有很多关于nc数据的命令,可查看。数据坐标系统建议使用WGS84。
国家青藏高原科学数据中心 收录
TimeExtractor
该数据集由JioNLP创建,旨在微调大型语言模型(LLMs)以从文本中提取时间实体,并将其标准化为JSON格式。数据集分为两部分:general.json包含从各种新闻来源提取的样本,smartspeaker.json包含从语音助手获取的样本。提取过程首先从文本中提取原始时间实体字符串,然后通过大型模型进行标准化处理,最终结果可以输入到JioNLP的时间解析模块jio.parse中进行处理,以获得准确可靠的结果。数据集目前规模较小,未来可以通过添加各种类型的文本来扩展。
huggingface 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
TM-Senti
TM-Senti是由伦敦玛丽女王大学开发的一个大规模、远距离监督的Twitter情感数据集,包含超过1.84亿条推文,覆盖了超过七年的时间跨度。该数据集基于互联网档案馆的公开推文存档,可以完全重新构建,包括推文元数据且无缺失推文。数据集内容丰富,涵盖多种语言,主要用于情感分析和文本分类等任务。创建过程中,研究团队精心筛选了表情符号和表情,确保数据集的质量和多样性。该数据集的应用领域广泛,旨在解决社交媒体情感表达的长期变化问题,特别是在表情符号和表情使用上的趋势分析。
arXiv 收录