Correct predictions are in blue. If we detect only a subset of a labelled sentence, we highlight the caught part as blue, the missing part light blue. False positives are in green and false negatives are in red.

Problem Refinery_Planning — Constraint detection

An oil refinery purchases two crude oils -LRB- crude 1 and crude 2 -RRB- . These crude oils are put through four processes : distillation , reforming , cracking and blending , to produce petrols and fuels that are sold . Distillation separates each crude oil into fractions known as light naphtha , medium naphtha , heavy naphtha , light oil , heavy oil and residuum according to their boiling points . Light , medium and heavy naphthas have octane numbers of 90 , 80 and 70 , respectively . The fractions into which one barrel of each type of crude splits are given in a table . The naphthas can be used immediately for blending into different grades of petrol or can go through a process known as reforming . Reforming produces a product known as reformed gasoline with an octane number of 115 . The yields of reformed gasoline from each barrel of the different naphthas are given as follows : 1 barrel of light naphtha yields 0.6 barrels of reformed gasoline ; 1 barrel of medium naphtha yields 0.52 barrels of reformed gasoline ; 1 barrel of heavy naphtha yields 0.45 barrels of reformed gasoline . The oils -LRB- light and heavy -RRB- can either be used directly for blending into jet fuel or fuel oil or be put through a process known as catalytic cracking . The catalytic cracker produces cracked oil and cracked gasoline . Cracked gasoline has an octane number of 105 . 1 barrel of light oil yields 0.68 barrels of cracked oil and 0.28 barrels of cracked gasoline ; 1 barrel of heavy oil yields 0.75 barrels of cracked oil and 0.2 barrels of cracked gasoline . Cracked oil is used for blending fuel oil and jet fuel ; cracked gasoline is used for blending petrol . Residuum can be used for either producing lube-oil or blending into jet fuel and fuel oil : 1 barrel of residuum yields 0.5 barrels of lube-oil . There are two sorts of petrol , regular and premium , obtained by blending the naphtha , reformed gasoline and cracked gasoline . The only stipulations concerning them are that regular must have an octane number of at least 84 and that premium must have an octane number of at least 94 . It is assumed that octane numbers blend linearly by volume . The stipulation concerning jet fuel is that its vapour pressure must not exceed 1kgcm2 ; the vapour pressures for light , heavy , cracked oils and residuum are 1.0 , 0.6 , 1.5 and 0.05 kg cm2 , respectively . It may again be assumed that vapour pressures blend linearly by volume . To produce fuel oil , light oil , cracked oil , heavy oil and residuum must be blended in the ratio 10:4:3:1 . There are availability and capacity limitations on the quantities and processes used as follows . The daily availability of crude 1 is 20 000 barrels . The daily availability of crude 2 is 30 000 barrels . At most 45 000 barrels of crude can be distilled per day . At most 10 000 barrels of naphtha can be reformed per day . At most 8000 barrels of oil can be cracked per day . The daily production of lube oil must be between 500 and 1000 barrels . Premium motor fuel production must be at least 40 % of regular motor fuel production . The profit contributions from the sale of the final products are -LRB- in pence per barrel -RRB- given in a table . How should the operations of the refinery be planned in order to maximize total profit ?

Problem Refinery_Planning — Detection of the decisions and objects to be modeled

An oil refinery purchases two crude oils -LRB- crude 1 and crude 2 -RRB- . These crude oils are put through four processes : distillation , reforming , cracking and blending , to produce petrols and fuels that are sold . Distillation separates each crude oil into fractions known as light naphtha , medium naphtha , heavy naphtha , light oil , heavy oil and residuum according to their boiling points . Light , medium and heavy naphthas have octane numbers of 90 , 80 and 70 , respectively . The fractions into which one barrel of each type of crude splits are given in a table . The naphthas can be used immediately for blending into different grades of petrol or can go through a process known as reforming . Reforming produces a product known as reformed gasoline with an octane number of 115 . The yields of reformed gasoline from each barrel of the different naphthas are given as follows : 1 barrel of light naphtha yields 0.6 barrels of reformed gasoline ; 1 barrel of medium naphtha yields 0.52 barrels of reformed gasoline ; 1 barrel of heavy naphtha yields 0.45 barrels of reformed gasoline . The oils -LRB- light and heavy -RRB- can either be used directly for blending into jet fuel or fuel oil or be put through a process known as catalytic cracking . The catalytic cracker produces cracked oil and cracked gasoline . Cracked gasoline has an octane number of 105 . 1 barrel of light oil yields 0.68 barrels of cracked oil and 0.28 barrels of cracked gasoline ; 1 barrel of heavy oil yields 0.75 barrels of cracked oil and 0.2 barrels of cracked gasoline . Cracked oil is used for blending fuel oil and jet fuel ; cracked gasoline is used for blending petrol . Residuum can be used for either producing lube-oil or blending into jet fuel and fuel oil : 1 barrel of residuum yields 0.5 barrels of lube-oil . There are two sorts of petrol , regular and premium , obtained by blending the naphtha , reformed gasoline and cracked gasoline . The only stipulations concerning them are that regular must have an octane number of at least 84 and that premium must have an octane number of at least 94 . It is assumed that octane numbers blend linearly by volume . The stipulation concerning jet fuel is that its vapour pressure must not exceed 1kgcm2 ; the vapour pressures for light , heavy , cracked oils and residuum are 1.0 , 0.6 , 1.5 and 0.05 kg cm2 , respectively . It may again be assumed that vapour pressures blend linearly by volume . To produce fuel oil , light oil , cracked oil , heavy oil and residuum must be blended in the ratio 10:4:3:1 . There are availability and capacity limitations on the quantities and processes used as follows . The daily availability of crude 1 is 20 000 barrels . The daily availability of crude 2 is 30 000 barrels . At most 45 000 barrels of crude can be distilled per day . At most 10 000 barrels of naphtha can be reformed per day . At most 8000 barrels of oil can be cracked per day . The daily production of lube oil must be between 500 and 1000 barrels . Premium motor fuel production must be at least 40 % of regular motor fuel production . The profit contributions from the sale of the final products are -LRB- in pence per barrel -RRB- given in a table . How should the operations of the refinery be planned in order to maximize total profit ?

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