查询词典 venation

In particular, by introducing the force constraint between midrib and parallel venation, the dynamic simulation of leaves can be vividly performed.

针对以往研究中植物建模主要集中在对植物器官静态结构的仿真，通常会忽略树叶或花瓣的厚度问题，本文根据阔叶植物的自然属性，利用植物的茎枝和叶片结构的相似性，采用具有厚度信息的3D叶片建模方法，通过叶片平行脉位置方向的弹性约束关系来有效控制叶片的动态仿真。

The first chapter is the pandect, which defines the intention and extension of the Tianyuan poem, summarizes the basal status of Songs Tianyuan poem , tries to show the venation and the track of its development, analyses the reasons of its prosperity such as the social circumstance , the literary tradition and the framers.

第一章总论篇，明确田园诗这一概念的内涵与外延。对宋代田园诗的基本创作状况进行概述，力图呈现其发展的内在脉络和历史轨迹。从社会环境、文学传统和创作主体等方面揭示宋代田园诗繁荣的深层底蕴。

Pinna venation and pinna anatomy of Stangeriaceae are compared with those of Cycadaceae and Zamiaceae.

将这些特征与苏铁科和泽米铁科作了比较，并讨论了这些特征在系统学上的意义。

Pinna venation pattern and pinna anatomy of two species, Stangeria eriopus and Bowenia serrulata, representatives of the two genera in Stangeriaceae were studied in this paper.

详细研究了托叶铁科两属的2种代表植物Stanngeria eriopus和Bowenia serrulata的羽片脉序和羽片解剖学。

Leaves alternate, often distichous; petiole short; leaf blade simple, margin entire or serrulate, venation pinnate.

叶互生，通常2列；叶柄短单叶，有细锯齿的边缘全缘或，羽状脉。

After 13 months culture, sporophytes began to form. Each gametophyte had several archegonia, and only one sporophyte was produced per gametophyte. The first sporophyte frond was simple and had pinnate venation.

抱子体在经13个月的培养后开始产生，每个配子体虽然有许多的藏卵器，但只产生一株孢子体，第一片孢子体的叶片为单叶羽状脉。

Spores,the structure of leaf epidermis,the transverse section of stipes,the rhizome scales and the venation patterns were selected for study.Several of these characteristics were studied in detail for this group for the first time.Morphologically and phytogeographically,the phy...

结果表明，在该亚科植物类群中，主要分布于亚洲亚热带地区的篦齿蕨属、拟水龙骨属和水龙骨属的亲缘关系较近，而主要分布于亚洲热带地区的棱脉蕨属和亚洲温带地区的多足蕨属的系统位置则分别较孤立。

Leaves are simple, without stipule, usually spirally arranged, the venation parallel.

单叶，通常螺旋状排列，叶脉平行，无托叶；花序顶生，头状或穗状；花通常小型，两性，规则。

Fruit indehiscent, samaroid silicles, transversely oblong or ovoid, 1-seeded, thin walled, with woody and coarsely reticulate venation, angustiseptate, sessile, transversely 2-winged, 2-16-spined; wings prominent, longer or shorter than main part of fruit, with 3-20 subparallel veins extending full length; spines often unequal in length, at least some subparallel to pedicel, those on the seed-bearing fruit half longer; replum and valves margin united into a longitudinal vein; septum complete; style absent, obsolete, or conical and to 5 mm; stigma capitate, entire, long papillate.

果不裂，突出的翅，长或短于主要果，具3-20近平行脉深裂延长全长；刺通常不等长，在花梗，那些在种子取得成果半长上近平行的一些的至少；假隔膜和阀门边结合成为一纵向脉；隔膜完全；花柱无，废退，或者圆锥状和对5毫米；柱头头状，全缘，长具乳突。

Leaf blades with prominently tessellate venation; bamboos of temperate habitats

显著的叶片具棋盘格状脉序；温带的生境的竹子 8

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。