Based the gray trend relational degree and systems engineering theory, the model of gray trend relationalsystem is investigated.
本文应用系统工程理论，结合灰色趋势关联度，研究了灰色趋势关联系统及数学模型。
2
You also have to specify column types in a relationalsystem, so you might find yourself constrained by, say, the length of the address field.
因为您可能发现自己受制于地址字段的长度，所以您还必须在关系系统中指定列类型。
3
Based on the theory of gray relationalsystem, the analysis was made between the per-plant yield and the 6 relative agronomic characters in 16 turnip crosses.