As the twenty-first century begins, the attempt to erect a general theory of population growth has been abandoned, signaling for some an alarming trend in population studies. See also: Causes of Death ; Demographics and Statistics ; Life Expectancy ; Malthus, Thomas ; Social Functions of Death...
a原先的纸张统计有很多缺点 The original paper statistics have very many shortcomings[translate] aliu mei is a nice 刘mei是a 好[translate] aStructural columns by applying graph layout diagram schematic and closely cooperate with built in: end, door and window openings in walls, wall edges, GZ1...
The contribution rate of highland cultivated land net growth to the total cultivated land conservation and population capacity of artificial surface expansion in the highlands were estimated using Eqs.2and3, respectively. The contribution rate of the cultivated land net growth in the highlands for cons...
Eurostat: Migration and migrant population statistics (2018). http://ec.europa.eu/eurostat/statistics-explained/index.php/Migration_and_migrant_population_statistics#Migration_flows EUROSTAT: Asylum and managed migration data. Accessed July 2019. https://ec.europa.eu/eurostat/web/asylum-and-managed...
The world population is expected to increase greatly this century, aggravating current problems related to climate, health, food security, biodiversity, energy and other vital resources. Population growth depends strongly on total fertility rate (TFR), b
POPULATIONGROWTH • UntiltheMiddleAges,humanpopulationswereheldincheckbydiseases,faminesandwars,andthusgrewveryslowly.Ittookallofhumanhistorytoreach1billion.150yearstoreach3billion12yearstogofrom5to6billion(1999)-Population3xduring20thc.Cunningham-Cunningham-Saigo:EnvironmentalScience7thEd.Human...
As the contributors note, the combined pressures of an aging population, higher costs, a... AS Sethi,Schuler, Randall S 被引量: 3发表: 1989年 加载更多来源会议 The 7th International Days of Statistics and Economics (MSED) 2013/09/19 研究点推荐 Population aging demographic development HR ...
was 7.7% (Supplementary Fig.2b), the isolation enriched the population by sevenfold. Seven cell populations emerged from the two libraries (Fig.4a, Supplementary Fig.2c). Based on analysis of highly expressed genes (Supplementary Data2), the same cell types were identified in this combined ...
We collected GWAS summary statistics from 45 agronomic traits of economic importance in cattle, including reproduction (n= 12), production (milk-relevant;n= 6), body conformation (n= 18), health (immune/metabolic-relevant;n= 8) and one feed efficiency trait (i.e., residual feed intake, RF...
Longitudinal sampling of the stool has yielded important insights into the ecological dynamics of the human gut microbiome. However, human stool samples are available approximately once per day, while commensal population doubling times are likely on the