dataService

您的位置: 首页 > 数据服务 > 数据列表页

筛选

共检索到4220条 ,权限内显示50条;

Great Plains Population and Environment Data: Social and Demographic Data, 1870-2000 [United States];;Version 1
负责人:
关键词:
DOI:
doi:10.3886/icpsr04296.v1
摘要:
in 1940. The sample data collected information from 5 percent of the population. Sampling for the 1950 United States Census The person was the sampling unit
Great Plains Population and Environment Data: Social and Demographic Data, 1870-2000 [United States];;Version 2
负责人:
关键词:
DOI:
doi:10.3886/icpsr04296.v2
摘要:
in 1940. The sample data collected information from 5 percent of the population. Sampling for the 1950 United States Census The person was the sampling unit
Great Plains Population and Environment Data: Social and Demographic Data, 1870-2000 [United States];;Archival Version
负责人:
关键词:
DOI:
doi:10.3886/icpsr04296
摘要:
in 1940. The sample data collected information from 5 percent of the population. Sampling for the 1950 United States Census The person was the sampling unit
Data from: The Chord-Normalized Expected Species Shared (CNESS)-distance represents a superior measure of species turnover patterns
负责人:
关键词:
CNESS;dissimilarity;R function;species turnover;?\u2010diversity
DOI:
doi:10.5061/dryad.v41ns1rrp
摘要:
heless, commonly used dissimilarity measures require high sample completeness, or at least similar sample sizes between samples. In contrast, the Chord
Data from: Tracing the origin of the early wet-season Anopheles coluzzii in the Sahel
负责人:
关键词:
Anopheles coluzzii;effective population size;Anopheles gambiae;dormancy;Migration;SNPs;malaria;aestivation;seasonality;Holocene;Sahel
DOI:
doi:10.5061/dryad.t5k6f
摘要:
l the results agreed with aestivation. Large genetic distances separated samples taken a year apart, and during the first year, within-sample
Data from: The use of MSR (Minimum Sample Richness) for sample assemblage comparisons
负责人:
关键词:
Oligo-Miocene;Paleogene;early Neogene
DOI:
doi:10.5061/dryad.p1b6b
摘要:
Minimum Sample Richness (MSR) is defined as the smallest number of taxa that must be recorded in a sample to achieve a given level of inter
Data from: Optimal soil carbon sampling designs to achieve cost-effectiveness: a case study in blue carbon ecosystems
负责人:
关键词:
carbon stock;seagrass;tidal marsh;mangrove;sampling design;power analysis
DOI:
doi:10.5061/dryad.qj472r2
摘要:
(492 cores) to develop recommendations on the sampling effort required to achieve robust estimates of blue C. Using a broad-scale, spatially explicit
Data from: Origin of tensile strength of a woven sample cut in bias directions
负责人:
关键词:
yarn pullout and breakage;sample width effect;failure types;bias directions;Fabric strength
DOI:
doi:10.5061/dryad.5km60
摘要:
e is when a woven fabric sample is cut in such a way where the bias angle and hence the tension loading direction is around 45° relative to the principal direction
Data from: Sensitivity of functional diversity metrics to sampling intensity
负责人:
关键词:
functional diversity;Poaceae;Carabidae;trait data;community data;undersampling
DOI:
doi:10.5061/dryad.1fn46
摘要:
reproducible results in functional biodiversity research, we recommend that thorough sampling designs are used to sample communities and that datasets originally

意 见 箱

匿名:登录

个人用户登录

找回密码

第三方账号登录

忘记密码

个人用户注册

必须为有效邮箱
6~16位数字与字母组合
6~16位数字与字母组合
请输入正确的手机号码

信息补充