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Embryo with cotyledons much smaller than the hypocotyl; leaves small, often ericoid.

胚具子叶很多小于下胚轴;叶小,通常。 4 Baeckea 岗松属

A unisexual reproductive structure of gymnospermous plants such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that develop pollen-bearing sacs or naked ovules or seeds.

球果单性裸子植物的生殖器,例如针叶树和铁树目植物,一般由覆满鳞片和褶皱的中心轴构成,长螺旋状排列的孢子叶,孢子叶最终成为花粉囊或裸露的孢子或种子

A unisexual reproductive structure of gymnospermous plants such as conifers and cycads, typically consisting of a central axis around which there are scaly, overlapping, spirally arranged sporophylls that develop pollen-bearing sacs or naked ''.

球果单性裸子植物的生殖器,例如针叶树和铁树目植物,一般由覆满鳞片和褶皱的中心轴构成,长螺旋状排列的孢子叶,孢子叶最终成为花粉囊或裸露的孢子或种子

Stipules green, falcate, rarely ovate or ovate-lanceolate, herbaceous, margin sharply serrate or lobed, rarely entire, apex acute or acuminate; petiole sparsely pilose or pubescent; leaf blade interrupted imparipinnate with (2 or)3 or 4 pairs of leaflets, reduced to 3 leaflets on upper leaves; leaflets sessile or shortly petiolulate, obovate, obovate-elliptic, or obovate-lanceolate, 1.5–5 × 1–2.5 cm, abaxially appressed pilose on veins, or densely pubescent or tomentose-pubescent between veins, rarely glabrescent, markedly or sparsely glandular punctate, adaxially pilose, or hirsute or hirtellous on veins, rarely glabrescent, base cuneate to broadly so, margin acutely to obtusely serrate, apex rounded to acute, rarely acuminate. Inflorescence terminal, spicate-racemose, branched or not; rachis pilose.

绿色,镰刀形的托叶,卵形或卵状披针形的很少,草本,边缘锐切成锯齿状或者有叶,很少全缘,先端锐尖或渐尖;叶柄疏生柔毛或短柔毛;叶片间断奇数羽状具(2或)3或4小叶,退化至3小叶在上部叶片上;短的小叶无柄或具小叶柄,倒卵形,倒卵状椭圆形,披针形或倒卵形, 1.5-5 * 1-2.5 厘米,背面的贴伏的具柔毛的在脉上,在脉之间的或密被短柔毛的或被绒毛的短柔毛,很少脱落无毛显著具点,正面具柔毛的或疏生腺体,或具粗毛或在脉上,很少脱落无毛,基部楔形到宽楔形,花序顶生,穗状总状,与否的分枝;轴具柔毛。

The serious recording limitations due to the finite size of CCD and the space-bandwith products of an off-axis system and a lensless Fourier transform system are discussed.

分析了CCD参数对记录条件的限制、不同参考光的记录对CCD空间带宽的影响以及普通离轴全息系统与无透镜傅里叶变换全息系统中信息量的空间带宽积问题。

Analysis and experiment of phase-shifting coaxial lensless Fourier digital holography .

相移同轴无透镜傅里叶数字全息的分析与实验。

In this paper,the phase distortion has been discussed,by using different reconstruction beam to reconstruct digital holographic image of 3D ob- ject in lensless Fourier holography.

本文研究了离轴无透镜傅里叶变换数字全息中,用非原参考光再现三维物体而引入的相位畸变问题,通过详细的理论分析,得出相应的相位畸变表达式。

Analysis and experiment of phase-shifting coaxial lensless Fourier digital holograph.

相移同轴无透镜傅里叶数字全息的分析与实验。

It shows that the lensless Fourier transform digital hologram can be reconstructed at any distance by Fresnel transform algorithm. For convolution algorithm,the whole reconstructed image with high resolution can be acquired in an optimal reconstruction range or a small area around it.

结果表明:利用菲涅耳变换算法对离轴无透镜傅里叶变换数字全息进行重建时,无重建距离的限制;采用卷积重建法只能在最佳再现距离附近一个非常小的范围内才能获得高分辨率再现像;而采用角谱重建法在略小于最佳再现距离及大于最佳再现距离较大范围内重建,均能获得高分辨率的再现像。

Based on the theorems of holography and linear system,the numerical reconstructing methods of the off-axis lensless Fourier transform hologram by Fresnel diffraction formula and by the convolution method based on Rayleigh-Sommerfeld diffraction integral and by angular spectrum theorem are studied.

根据全息理论和线性系统理论,采用离轴无透镜傅里叶变换全息记录光路,对利用菲涅耳近似法、基于瑞利—索末菲衍射积分的卷积法以及角谱理论方法数值重建全息图进行了比较研究,并做了计算机模拟验证。

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