In the simplest possible two-layered network, one would have one input neuron, or node, with an activation x, one hidden node, with activation y, and an output node with activation z, where the output is a function of the hidden node activation, which is in turn a function of the input activation.
Worldwide, the average life expectancy at birth was 71.0 years (68.5 years for males and 73.5 years for females) over the period 2010â2013 according to United Nations World Population Prospects 2012 Revision, or 70.7 years (68.2 years for males and 73.2 years for females) for 2009 according to The World Factbook.ethodology [edit]. Life expectancy equals the average number of years a person born in a given country would live if mortality rates at each age were to remain constant in the future.
During most of recorded history any human who reached the mid thirties had beaten the system. Over the past century we gained a global average of 30 years, about 25 of which are attributed to improvements in public health, according to federal statistics. Today, the global life expectancy is 67.2 years. It's around 78 years in the United States, and a few years more in Japan, the world leader for sticking around. Genetics, of course, play a key role in longevity.