As the“engine”of equipment continuous operation and repeated operation, equipment maintenance support plays a more prominent role in the confrontation of symmetrical combat systems. As the basis and guide for the pl...As the“engine”of equipment continuous operation and repeated operation, equipment maintenance support plays a more prominent role in the confrontation of symmetrical combat systems. As the basis and guide for the planning and implementation of equipment maintenance tasks, the equipment damage measurement is an important guarantee for the effective implementation of maintenance support. Firstly,this article comprehensively analyses the influence factors to damage measurement from the enemy’s attributes, our attributes and the battlefield environment starting from the basic problem of wartime equipment damage measurement. Secondly, this article determines the key factors based on fuzzy comprehensive evaluation(FCE) and performed principal component analysis (PCA) on the key factors. Finally, the principal components representing more than 85%of the data features are taken as the input and the equipment damage quantity is taken as the output. The data are trained and tested by artificial neural network (ANN) and random forest (RF). In a word, FCE-PCA-RF can be used as a reference for the research of equipment damage estimation in wartime.展开更多
长江流域冬油菜主产区一半以上土壤缺镁,影响油菜生长发育和籽粒产量,并可能加剧冻害对油菜的危害。为探究科学施镁肥对提高油菜产量和抗寒性的影响,本研究基于2022/2023和2023/2024年在江西进贤及湖北武穴开展的不同镁肥用量(0、15和45...长江流域冬油菜主产区一半以上土壤缺镁,影响油菜生长发育和籽粒产量,并可能加剧冻害对油菜的危害。为探究科学施镁肥对提高油菜产量和抗寒性的影响,本研究基于2022/2023和2023/2024年在江西进贤及湖北武穴开展的不同镁肥用量(0、15和45kghm^(-2)MgO)的田间试验,以2022/2023年作参考,对比了2023/2024年遭受低温冻害天气后的油菜籽产量及其构成因子、不同部位生物量、镁含量和地上部镁累积量等指标。结果表明,与不施镁肥处理相比,随着镁肥用量的增加,油菜籽产量呈上升趋势(增幅为6.2%~34.9%),同时施用镁肥降低了因低温冻害导致的产量损失(降幅为1.3%~8.9%)。与2022/2023季相比,2023/2024季油菜地上部生物量和镁累积量平均降低了38.0%~47.4%和41.2%~50.6%,施镁肥有效缓解了低温冻害对植株生物量的不利影响(降幅为4.0%~9.4%),同时增加了油菜地上部的镁累积量(增幅为16.9%~46.0%)。施用镁肥主要通过减少低温冻害对直播油菜收获密度和每角粒数的不利影响来提高籽粒产量,而对于移栽油菜而言,则通过有效保证植株的单株角果数来提升油菜产量,从而减轻低温冻害造成的影响。综上,油菜遭受冻害后其产量和镁累积量显著下降,施用镁肥可有效缓解低温冻害的不利影响,且当镁肥用量为45 kg hm^(-2)MgO时,油菜增产及对低温冻害的抵抗效果最佳。展开更多
文摘As the“engine”of equipment continuous operation and repeated operation, equipment maintenance support plays a more prominent role in the confrontation of symmetrical combat systems. As the basis and guide for the planning and implementation of equipment maintenance tasks, the equipment damage measurement is an important guarantee for the effective implementation of maintenance support. Firstly,this article comprehensively analyses the influence factors to damage measurement from the enemy’s attributes, our attributes and the battlefield environment starting from the basic problem of wartime equipment damage measurement. Secondly, this article determines the key factors based on fuzzy comprehensive evaluation(FCE) and performed principal component analysis (PCA) on the key factors. Finally, the principal components representing more than 85%of the data features are taken as the input and the equipment damage quantity is taken as the output. The data are trained and tested by artificial neural network (ANN) and random forest (RF). In a word, FCE-PCA-RF can be used as a reference for the research of equipment damage estimation in wartime.
文摘长江流域冬油菜主产区一半以上土壤缺镁,影响油菜生长发育和籽粒产量,并可能加剧冻害对油菜的危害。为探究科学施镁肥对提高油菜产量和抗寒性的影响,本研究基于2022/2023和2023/2024年在江西进贤及湖北武穴开展的不同镁肥用量(0、15和45kghm^(-2)MgO)的田间试验,以2022/2023年作参考,对比了2023/2024年遭受低温冻害天气后的油菜籽产量及其构成因子、不同部位生物量、镁含量和地上部镁累积量等指标。结果表明,与不施镁肥处理相比,随着镁肥用量的增加,油菜籽产量呈上升趋势(增幅为6.2%~34.9%),同时施用镁肥降低了因低温冻害导致的产量损失(降幅为1.3%~8.9%)。与2022/2023季相比,2023/2024季油菜地上部生物量和镁累积量平均降低了38.0%~47.4%和41.2%~50.6%,施镁肥有效缓解了低温冻害对植株生物量的不利影响(降幅为4.0%~9.4%),同时增加了油菜地上部的镁累积量(增幅为16.9%~46.0%)。施用镁肥主要通过减少低温冻害对直播油菜收获密度和每角粒数的不利影响来提高籽粒产量,而对于移栽油菜而言,则通过有效保证植株的单株角果数来提升油菜产量,从而减轻低温冻害造成的影响。综上,油菜遭受冻害后其产量和镁累积量显著下降,施用镁肥可有效缓解低温冻害的不利影响,且当镁肥用量为45 kg hm^(-2)MgO时,油菜增产及对低温冻害的抵抗效果最佳。
