以杂交稻组合Ⅱ优673的亲本Ⅱ-32A和福恢673为材料,以久保田6行步行式插秧机为插秧机械,设置每公顷用种量15.0,22.5和30.0 kg 3个处理,以人工移栽母本每公顷用种量22.5 kg为对照,研究杂交稻制种母本机械化插秧的效果和产量表现。结果表...以杂交稻组合Ⅱ优673的亲本Ⅱ-32A和福恢673为材料,以久保田6行步行式插秧机为插秧机械,设置每公顷用种量15.0,22.5和30.0 kg 3个处理,以人工移栽母本每公顷用种量22.5 kg为对照,研究杂交稻制种母本机械化插秧的效果和产量表现。结果表明,久保田行走式插秧机可以实现有序插秧,能满足杂交稻制种母本机械化插秧的要求;机插母本分蘖速率加快,单丛最高苗数和有效穗数增加,但成穗率降低;机插对母本生育期影响较小,但抽穗比手插集中;每公顷用种量22.5和30.0 kg机插处理每平方米穗粒数与手插对照相当,但结实率增加,产量增加;母本机插在育秧和插秧2个方面合计比手插节约成本863.75~1 027.85元/hm2。母本机插可实现杂交稻制种高效、高产、稳产的目标。展开更多
A rigorous supermode solution method in a strong absorption slab multilayer waveguide is performed. The method is directed toward finding solutions for a sophisticated complex determinant in a complex plane. The rigor...A rigorous supermode solution method in a strong absorption slab multilayer waveguide is performed. The method is directed toward finding solutions for a sophisticated complex determinant in a complex plane. The rigorous results are applied to design a waveguide photodetector that has a configuration of a vertical directional coupler. Absorption lengths of the supermodes and coupling length of the coupler are calculated based on an effective index approach by using the rigorous results of the strong absorption slab multilayer waveguide to optimize the directional coupling waveguide photodetector.展开更多
基金supported by the National Natural Science Foundation of China under Grant Nos. 61177036and 60925019
文摘A rigorous supermode solution method in a strong absorption slab multilayer waveguide is performed. The method is directed toward finding solutions for a sophisticated complex determinant in a complex plane. The rigorous results are applied to design a waveguide photodetector that has a configuration of a vertical directional coupler. Absorption lengths of the supermodes and coupling length of the coupler are calculated based on an effective index approach by using the rigorous results of the strong absorption slab multilayer waveguide to optimize the directional coupling waveguide photodetector.