叶脉

In this paper, an approach based on artificial neural network learning is proposed to extract leaf venation.

为了充分利用图像的信息，本文提出了一种基于人工神经网络的叶脉提取方法。

Venation is the distribution of veins in a leaf.

脉序是叶片中各叶脉的排列分布状态。

There are two kinds of venation , parallel and net

叶脉有两种：平行脉和网状脉。

The pattern in which the veins are arranged in a leaf is called the VENATION.

在叶片中，所有叶脉排列的方式称脉络。

Large proportion of xylem benefit to the water transfer.

叶脉中木质部比重越大，越有利于水分的传输。

Where, when brewing tea slowly sinking, due to high aroma; bitter taste of green tea, liquor color green, in the folder have aeruginous Securinega shoots; tea taste with less Shibuya thick, dark red liquor color, Securinega over Hong-Liang; whether black tea or green tea, it is thin and hard Securinega are on the folder more leaf, vein coarse, serrated leaf margin evident that this was the summer of tea.

凡冲泡时茶叶下沉较慢，香气欠高；绿茶滋味苦涩，汤色青绿，叶底中夹有铜绿色芽叶；红茶滋味欠厚带涩，汤色红暗，叶底较红亮；不论红茶还是绿茶，叶底均显得薄而较硬，对夹叶较多，叶脉较粗，叶缘锯齿明显，此为夏茶。

The results show that the leaf of Alnus cremastogyne is typical of bifacial leaf, the structural parameters of leaf among clones are very significant difference (P.01), of which the cuticle thickness varies most and the stoma density takes the second place, but cell tense ratio and spongy ratio and vein protuberant degree are comparatively stable.

结果表明，桤木叶为典型的异面叶，各无性系间叶片结构指标均存在极显著差异，其中角质层厚度变异最大，气孔密度次之，而叶片组织结构紧密度、叶片组织结构疏松度和叶脉突起度等比较稳定。

Sepals erect and outcurving or appressed in flower and fruit; leaf venation neither visibly reticulate nor conspicuous

萼片直立和外曲或贴伏的在花期和果期；叶脉既不明显网状也不明显 25

Any of various chiefly tropical evergreen trees,shrubs,or woody vines of the family Palmaeor Arecaceae, characteristically having unbranched trunks with a crown of large pinnate or palmate leaves having conspicuous parallel venation.

棕榈科植物棕榈科的各种主要的热带常绿树、灌木或木质藤本植物，特点为有无分支的树干，其顶端集生羽状或掌状的树叶，并带有明显的平行叶脉

Areoles without glochids; leaves broad and flat, pinnately nerved,± persistent; flowers solitary or in inflorescences, mostly stalked; ovary superior to inferior; seeds black, not arillate.

没有钩毛的小窠；叶宽和平，成羽状叶脉，多少宿存；在花序，多数柄里的花单生或；子房上位到下位；种子黑色，不具假种皮。 1 Pereskia 木麒麟属

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。