Human population dynamics revisited with the logistic model: how much can be modeled and predicted? Technological Forecasting and Social Change, 52(1): 1-30.Marchetti, C., Meyer, P. S., & Ausubel, J. H. (1996). Human population dynamics revisited with the logistic model: How much can ...
Experts believe human population in sub-Saharan Africa(撒哈拉以南非洲地区)will double by 2050, making the problem worse.The USFWS asked for African lions to be listed as "threatened" under the Endangered Species Act(《濒危物种法案》). This move would help protect them from extinction.Wildlife ex...
29 With the global populationpredictedto hit close to 10 bilpon by 2050, and forecasts that agricultural production in some regions will need to nearly double to keep pace, food security is increasingly making headpnes. In the UK, it has become a big talking point recently too, for a rathe...
The article reports on projections by the Census Bureau indicating that minority groups will become the majority of the population in the U.S. in 2042. The projections by the Census Bureau also show that minorities, who make up a third of the population of the U.S. in 2008, will increase...
And it turns out that it translates to about 5 million more deaths per year in men in 2050, compared to today." This isn't the first study to paint a less-than-optimistic outlook at the future of cancer case numbers. Earlier this year, the World Health Organization predicted we will se...
到2050年,人口将超过90亿。其次,世界将变暖,一些政府不会优先考虑应对气候变化所需的长期措施,尽管科学为我们提供了低碳未来的路线图)和第二段That'swhyweshouldbepromotersofnewtechnology—withoutittheworldcan'tprovidethefoodandsustainableenergyneededforanexpandingpopulation.(这就是为什么我们应该成为新技术的推动者...
We used three modelling approaches to predict the distributions ofRhodiolaspecies: (1) MEAN ENSEMBLE: using each Global Climate Model (GCM, one GCM for LIG and current, 4 GCMs for LGM, and 17GCMs for 2050, respectively) to do ensemble ENM, and then calculated the mean and standard deviation...
One prominent aspect of the market analysis is the growing demand for renewable energy solutions in Dubai. The UAE government has set a target to generate 75% of its energy from clean sources by 2050. This has opened up opportunities for renewable energy companies to invest and provide sustainab...
“lme” function. The country of origin was used as a random effect correction, while latitude/longitude was used for spatial autocorrelation correction, to account for human differences in the sampling strategy. In SEM analysis, the best fitting models are considered to be those that are similar...
Many planes flying today are already 30 years old, and most new planes sold in 2020 will still be flying in 2050. Airbus expects to deliver 25,000 new aircraft worth $3.1 trillion over the next 20 years – but this will still only be a small fraction of the global total. Planes sold...