Mean absolute error

Presque tous les critères classiques de prévision sont calculés à partir de l’écart, à la période t (notéet), entre la réalisation et la prévision. Comme nous le précisions au paragraphe précédent, il s’agit de l’erreur de prévision, ou forecast error. Comme le montre l’illustration suivante, les critères de qualité des prévisions peuvent être simples et de ce fait mobilisateurs. 5.1 L’erreur moyenne et l’erreur absolue moyenne L’erreur moyenne de prévision correspond à la somme des erreurs

opportunity. This modern reality of human control over nature, apart from which democratic ideals would be futile, is not wholly due to the advance of scientific knowledge and invention. The greater control which man now wields is conditional, and not absolute like the control of nature over man by famine and pestilence. Human riches and comparative security are based to-day on the division and co-ordination of labor, and on the constant repair of the complicated plant which has replaced the simple tools

nationale d’ingénieurs de Tunis, B.P. 37, 1002 Tunis-Belvédère, Tunisie ; noamene_b@yahoo.fr ** INRGREF, Tunisie, nasri.slah@iresa.agrinet.tn Abstract El Gouazine catchment (18,1 km²), situated in semi-arid central Tunisia (with 350 mm of annual mean rainfall), was concerned in construction of contour ridges with total water runoff retention on 43% of its area between June 1996 and July 1997. After installation, the inflow to the reservoir decreased by 50%-80% the contributions of water; in the

maintenance of this pressure curve in every cycle guarantees uniformity of the quality of injection moulded parts. If the mould internal pressure curve is maintained at a constant, all of the negative factors mentioned above are compensated, this can mean: • Significant reduction in start-up cycles. The required consistency in quality characteristics is achieved after just a few cycles. Better reproducibility of the parts. The deviation spread of the various dimensions lies significantly below that

tank which is already in the inert condition with the object of raising the tank pressure to prevent any ingress of air. Torch See ‘Flashlight’. Toxic Poisonous to human life. True vapour pressure (TVP) The true vapour pressure of a liquid is the absolute pressure exerted by the gas produced by evaporation from a liquid when gas and liquid are in equilibrium at the prevailing temperature and the gas/liquid ratio is effectively zero. Ullage The depth of the space above the liquid in a tank. Upper flammable

supplémentaire. 79 Surtout aux Etats-Unis. 80 Gibb, cité par Monsted, met en évidence les différences qui, d'après lui, existent entre l'éducation actuelle et l'entrepreneurship : Education focus on The past Critical analysis Knowledge Passive understanding Absolute detachment Manipulation of symbols Written communication and neutrality Concept Entrepreneurial focus on The future Creativity Insight Active understanding Emotional involvment Manipulation of events Personal communication and influence Problem

79 Surtout aux Etats-Unis. 80 Gibb, cité par Monsted, met en évidence les différences qui, d'après lui, existent entre l'éducation actuelle et l'entrepreneurship : Education focus on The past Critical analysis Knowledge Passive understanding Absolute detachment Manipulation of symbols Written communication and neutrality Concept Entrepreneurial focus on The future Creativity Insight Active understanding Emotional involvment Manipulation of events Personal communication and influence Problem or

Surtout aux Etats-Unis. 130 Gibb, cité par Monsted, met en évidence les différences qui, d'après lui, existent entre l'éducation actuelle et l'entrepreneurship : Education focus on The past Critical analysis Knowledge Passive understanding Absolute detachment Manipulation of symbols Written communication and neutrality Concept Entrepreneurial focus on The future Creativity Insight Active understanding Emotional involvment Manipulation of events Personal communication and influence

org/en/docs/sdteecb20051ch6_en.pdf. Official Notes: NOTE: The laws respecting pornography vary considerably throughout the Commonwealth. For this reason, the prohibition in the model law is limited to child pornography, which is generally the subject of an absolute prohibition in all member countries. However a country may wish to extend the application of this prohibition to other forms of pornography, as the concept may be defined under domestic law. NOTE: The pecuniary penalty will apply to a corporation