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stratify 中文解釋 wordnet sense Collocation Usage Collins Definition
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stratifies, 3rd person singular present; stratified, past tense; stratified, past participle; stratifying, present participle;
  1. Form or arrange into strata
    • - socially stratified cities
    • - the residues have begun to stratify
  2. Arrange or classify
    • - stratifying patients into well-defined risk groups
  3. Place (seeds) close together in layers in moist sand or peat to preserve them or to help them germinate

  4. (of seeds) Be germinated by this method

  1. divide society into social classes or castes; "Income distribution often stratifies a society"
  2. form layers or strata; "The rock stratifies"
  3. form, arrange, or deposit in layers; "The fish are stratified in barrels"; "The rock was stratified by the force of the water"; "A statistician stratifies the list of names according to the addresses"
  4. render fertile and preserve by placing between layers of earth or sand; "stratify seeds"
  5. (stratification) the act or process or arranging persons into classes or social strata
  6. (stratification) the condition of being arranged in social strata or classes within a group
  7. Stratification of clinical trials, is the partitioning of subjects and results by a factor other than the treatment.
  8. (Stratification (botany)) In horticulture, stratification is the process of pretreating seeds to simulate natural winter conditions that a seed must endure before germination. Many seed species undergo an embryonic dormancy phase, and generally will not sprout until this dormancy is broken. ...
  9. (Stratification (statistics)) In statistics, stratified sampling is a method of sampling from a population.
  10. (Stratification (water)) Water stratification occurs when water of high and low salinity (halocline), oxygenation (chemocline), density (pycnocline), temperature (thermocline), forms layers that act as barriers to water mixing.
  11. To become separated out into distinct layers or strata; To separate out into distinct layers or strata
  12. (Stratifying) where a site to be sampled is divided into sub-units (strata) based on the homogeneity of some feature within each sub-unit. ...
  13. (Stratification) Occurs in blended fuels that have a compatibility problem. It is usually experienced when paraffinic based oils are mixed with asphaltic based oils, causing asphaltenes to precipitate and settle to the bottom of the tank.
  14. (stratification) a structure produced by deposition of sediments in beds or layers (strata), laminae, lenses, wedges, and other essentially tabular units.
  15. (stratification) division of a forest, or any ecosystem, into separate layers of vegetation that provide distinct niches for wildlife. See canopy, understory, and herbaceous vegetation.
  16. (stratification) separation of a study cohort into subgroups or strata according to specific characteristics.
  17. (stratification) A physical and chemical process that results in the formation of distinct layers of water within a lake or reservoir (i.e., epilimnion, metalimnion, and hypolimnion).
  18. (stratification) A method of organising a population in order to improve the representativeness of a sample.
  19. (stratification) The layering of water in oceans and lakes due to differences in water density and temperature with depth. [2]
  20. (Stratification) A process of subdividing the population into relatively homogeneous groups called strata. Stratified sampling consists of independently selecting samples from each of these strata. ...
  21. (Stratification) Oftentimes when someone refers to stratification, they are referring to the process of cold treating a seed in order to break its dormancy. But, on a broader level, stratification can also refer to any process used to help a seed germinate. ...
  22. (Stratification) The layered structure of sedimentary rock.
  23. Stratification involves dividing a sample into homogeneous subsamples based on one or more characteristics of the population. For example, samples may be stratified by 10-year age groups, so that, for example, all subjects aged 20 to 29 are in the same age stratum in each group. ...
  24. (stratification) in reference to society, a system by which social, economic and political inequalities are structured in society.
  25. (Stratification) A condition that occurs when the acid concentration varies from top to bottom in the battery electrolyte. Periodic, controlled charging at voltages that produce gassing will mix the electrolyte. See equalization.