In 1981—1987, the damage to rice of the third generation rice leaf-tier Parnara guttata Bremer et Grey larvae was studied.
作者于1981—1987年对直纹稻弄蝶第三代幼虫为害损失进行了研究。
As above, the contest price strategy of generation companies is composed of Competitive Bidding Strategies model, Future Contract and Grey model.
上述方法中，将竞价策略模型与期货合约，灰色模型结合在一起组成发电厂商的竞价策略。
The accuracy of grey evaluation is improved because of the improvement of mean generation and the selection of evaluation indexes.
本文对均值生成，评估指标(简称为指标)的选择作了改进，提高了灰色评估的准确性。
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