In matrix population models, the process of population "projection" through a number of time steps is fundamentally multiplicative, hence the arithmetic mean of the consecutive matrices is of doubtful meaning, while the geometric mean quite corresponds to the multiplication principle. The geometric mean...
* In 1798, English economist Thomas Malthus proposed the theory that human population growth tends to outrun the production of goods needed to sustain people because population grows geometrically, while production grows arithmetically. According to Malthus, this would create never-ending cycles of hum...
(b) To avoid the autoimmunity phenomenon, it is necessary to keep a proper arithmetic mean distance among each generated Ig in the population. The value of width inside individual Ig can be adjusted through Eq. (3). $$\varphi_{j} = \varphi_{{\text{D}}} \left[ {1 + (1 + \exp...
The amount of drinking and potable water required according to the population projection is 12.38, 26.50, 69.12, and 109.50 hm3/year for 2010, 2030, 2050, and 2060 respectively. The existing water resources of the peninsula will be able to meet the requirements until 2030. In order to meet...
Beyond the linear distances, the surface projection of certain facial features was also appreciated in the literature among different populations. The facial angles were the common parameters used in this regards. The angular measurement of the face has also been used to provide an insight into the...
* In 1798, English economist Thomas Malthus proposed the theory that human population growth tends to outrun the production of goods needed to sustain people because population grows geometrically, while production grows arithmetically. According to Malthus, this would create never-ending cycles of hum...
A projection is a “what-if” exercise based on explicit assumptions that may or may not themselves be correct. As long as the arithmetic of a projection is done correctly, its utility is determined by the plausibility of its central assumptions. If the assumptions embody plausible future ...
arithmetic of a projection is done correctly, its utility is determined by the plausibility of its central assumptions. If the assumptions embody plausible future trends, then the projection’s outputs may be plausible and useful. If the assumptions are implausible, then so is the projection. ...
With the help of the “curve fitting method” in SPSS for rough projection and on the premise of passing the significance test, we selected the curve cluster with a high fitting degree and relatively close to the reality and performed arithmetic average processing. On this basis, according to ...
Then, we combined demographic and future projection data to analyze the changing characteristics of population exposure to rainstorm waterlogging. The results indicate that the population exposure to urban waterlogging is expected to increase in the future. Under the conditions of rainstorm events with ...