可分为五种类型,即直叶:叶片直立;挺叶:叶片上部稍弯,但叶尖仍在最高点上;弯叶:叶尖降至最高点以下,但仍然在该叶叶枕至最高点的1/2以上;披叶:叶尖降至叶枕至最高点的1/2以下,但不低于叶枕;垂叶:叶尖降至该叶叶枕以下。 叶相反映了稻株的代谢状况,稻株代谢愈旺盛,生长愈迅速,叶片组织愈嫩,则披、垂愈严重;反之,稻株逐渐向积累型代谢转移时,生长减慢,叶片伸长受到抑制,叶片便逐渐挺、直。披、垂叶在叶面积指数较小时,可以扩大受光面积,有利于提高光能利用率;
名词定义中文名称:叶相英文名称:leaf physiognomy定义:应用叶形态学来反映气候条件的综合植物学标志。包括叶级、叶缘、叶型(叶结构)、叶片质地、滴水尖的有无、主要叶脉类型、叶脉密度和叶基部形态等。应用学科: 古
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相对傅里叶相(relative fourier phase,RFP):从骨盆、腰椎节段、胸廓的时序,应用快速离散傅里叶变换计算公式计算出设定窗宽的傅里叶相。
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大叶相思 Acacia auriculiformis ; Acacia mangium ; Acaciaauriculeaformis ; ACacia auriculaeformis
藤叶相思树 broom wattle
银叶相思树韧皮纤维 acacia leucophloca
镰叶相思木 Brigalow spearwood ; walking-stick wattle
平展叶相思木 mayallwood ; may all wattle
叶相分析 Leaf Physiognomy
叶相思 Acacia auriculiformis
相叶雅纪 Masaki Aiba ; Aiba Masaki ; ARASHI ; Aiba
导叶相对开度 [机] relative opening of guide vane
其特征是同风叶相固定的电机轴穿过平面机座 再同风叶相固定;
The draught fan is characterized in that the motor shaft fixed with the impeller inducer passes through a plane frame to be fixed with the impeller inducer again.
所以你们可以看到在杂化轨道里,我们上面,由很大的一叶相长干涉。
So you see in the hybrid orbital we actually have a larger lobe on top where they constructively interfered.
一氧化碳有很简单且独特的最外层轨道结构,两个并列的叶形从尖端的末梢伸出,一个带正相而另一个是负相。
Carbon monoxide has a simple but distinctive outermost orbital structure with two side-by-side lobes sticking out from the end of the tip, one with a positive phase and the other a negative phase.
And it turns out that when you constructively have two p orbitals interfere, and when I say constructively, I mean they're both either positive or they're both the negative lobes, that's when you got bonding.
当两个p轨道,相长干涉时,我说的相干相长,意思就是说它们要么都是,正的叶瓣要么都是负的叶瓣,这时就能成键。
You could compare this poem to the poem placed last in Yeats's last poems called "Politics" that might seem to say something similar.
你们可以将这首诗与,叶芝诗篇的最后一首“政治“相比较“,它们可能会说一些相似的东西。
If you compare the s orbital with the bottom lobe, these have a different sign so they're going to destructively interfere.
如果你们比较s轨道和下面这叶,它们正负号相反,所以它们相消干涉。
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