在原油评价数据库中，为提高物性计算的精度，采用神经网络方法计算原油中馏分油物性。
In crude oil evaluation database, physical properties are calculated by using a neural network method.
石油及其馏分的物性数据是石油炼制工艺设计的基础数据，以往常常采用手工计算或查阅有关图表获得。
The property data of crude oil and its fraction is the basic data in design of petroleum refining technology. In the past these data were obtained by hand calculation or consulting tables and charts.
石油化工用换热器传热计算大量涉及烃类及其混合物物性数据的计算。
The thermal conduction calculation of heat exchanger used in petrochemical engineering is largely related to physical data of hydrocarbon and its mixture.
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