... economic net value 经济净现值 economic thresbold value 防治指标 economic life value 生命的经济价值 ...
基于6个网页-相关网页
... 多用途拖轮 multi-functional tug 防治指标 norm of control 非线特性 no_circuit characteristics ...
基于6个网页-相关网页
Short term forecast model of disease development and wood loss rate are built. Control guideline and economic threshold value are decided.
建立了病害发生的短期测报模型和材积损失率估测模型，确定了病害的防治指标和经济阈值。
参考来源 - 樟子松枯梢病侵染与流行规律的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
同时文中给出了松嫩平原西部速生丰产林的防治指标。
At same time, the paper has also given the control index of fast-growing and high-yield plantation in the west part of Songnen plains.
同时文中给出了松嫩平原西部速生丰产林的防治指标。
At same time, the paper has also given the control index of fast-growing and high-yield plantation in the west...
模型库中有主要害虫种群动态预测模型及动态防治指标模型。
The model system contains 3 kinds of main pests forecasting models and their dynamic economic thresholds models.
应用推荐