Class: AutomobileYear

Inherits:
ActiveRecord::Base
  • Object
show all
Extended by:
Earth::Model
Defined in:
lib/earth/automobile/automobile_year.rb

Constant Summary collapse

TABLE_STRUCTURE = 
<<-EOS

CREATE TABLE automobile_years
  (
     year INTEGER NOT NULL PRIMARY KEY
  );

EOS

Class Method Summary collapse

Methods included from Earth::Model

extend_mining, extended, registry

Class Method Details

.weighting(year) ⇒ Object

Estimate of % of vehicles currently in use that were manufactured in each year Derived from 2012 EPA GHG inventory appendix tables A-91, A-92, and A-95 Used by AutomobileMakeModelYear and AutomobileMakeYear to get weighting so other classes can derive weighted fuel efficiency



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# File 'lib/earth/automobile/automobile_year.rb', line 20

def self.weighting(year)
  {
    2012 => 0.0607,
    2011 => 0.0491,
    2010 => 0.0560,
    2009 => 0.0669,
    2008 => 0.0677,
    2007 => 0.0668,
    2006 => 0.0641,
    2005 => 0.0620,
    2004 => 0.0624,
    2003 => 0.0625,
    2002 => 0.0610,
    2001 => 0.0546,
    2000 => 0.0467,
    1999 => 0.0410,
    1998 => 0.0347,
    1997 => 0.0289,
    1996 => 0.0244,
    1995 => 0.0189,
    1994 => 0.0139,
    1993 => 0.0112,
    1992 => 0.0094,
    1991 => 0.0084,
    1990 => 0.0066,
    1989 => 0.0056,
    1988 => 0.0047,
    1987 => 0.0037,
    1986 => 0.0025,
    1985 => 0.0054
  }[year]
end