筛选
科学数据
统计数据
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:
- 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:
- 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:
- 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: Effects of sample fixation on specimen identification in biodiversity assemblies based on proteomic data (MALDI-TOF)
- 负责人:
- DOI:
- doi:10.5061/dryad.1md2jq1
- 摘要:
- fixated in varying ethanol concentrations. Therefore, sediment samples from a mudflat sampling site in the North Sea were stored under
Data from: Optimal soil carbon sampling designs to achieve cost-effectiveness: a case study in blue carbon ecosystems
- 负责人:
- 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:
- 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:
- 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