查询词典 angular aperture

Bryophyte spores have three types of aperture, the trilete is original one, the monolete is the evolutionary character and the katalept is mostly common one.

苔藓孢子的萌发孔有3种类型：三裂缝为原始类型，单裂缝是进化性状，近极薄壁区是最常见的。

Manufacture of big aperture lightweight paraboloidal mirror is one of the key techniques for the research of the Cassegrain optical system.

研制某卡塞格林光学系统的关键技术之一是通光口径超过1000mm的轻质抛物面主反射镜。该反射镜相对口径为1/2，减重率为65%，是目前国内最大口径的轻质非球面反射镜。

In the laser engineering system,a beam expander and an annular aperture were taken as the equivalent of the Cassegrain telescope system.

在激光工程系统中，把卡塞格林望远系统等效为一个扩束器和环形光阑的组合形式，研究了激光束的光腰半径与卡塞格林望远系统的参数匹配问题。

The symmetry no longer existed when the projection of light source is not located in the symmetry center of rectangular aperture.

当光源的孔面投影不在矩孔中心时光强分布的对称性不复存在。

The diffraction theory of Kirchhoff is applied to the four-pinhole aperture diffraction screens, the intensity, the zero-contour of the real and imaginary parts of complex amplitude and the phase distribution in deep Fresnel diffraction region are simulated, and it is found that the bright spots in interference field show central symmetry distribution. When the observation plane close to the diffraction screen, the zero-value points of light intensity can form line segment, on which the eccentricities of the light intensity isoline are close or equal to 1, the intensity changes very fast on both sides of the zero-line of light intensity.

利用基尔霍夫衍射理论计算了四圆孔径衍射屏在菲涅尔深区形成的的干涉光场的强度、零值线和相位的分布，发现干涉光场亮斑关于中心呈对称分布，在距离衍射屏较近的观察面上，光强值为的零点组成光强零值线段，该线段上光强等值线的离心率都接近或等于1，其两侧的光强值变化非常剧烈。

All pixels within the aperture are used by the software to determine the centroid and flux of the object.

在这个半径内的所有像素都被软件用以识别其目标等效中心及光亮度。

The effect of crystallization process from polymers, control laws of particles from the long-chain structure of polymer, as well as the self-assembly regulatory mechanism of nano-particles from polymer are investigated , through the control of its morphology and properties of precursor order to get large aperture, high specific surface area, has good thermal stability and catalytic cerium oxide particles.

研究聚合物对结晶过程的影响、聚合物的长链结构对粒子自组装的控制规律以及聚合物对纳米粒子自组装的调控机理，通过控制其前驱体的形貌和性能，以期得到大孔径、高比表面积、具有良好的热稳定性及催化作用的氧化铈颗粒。

OBJECTIVE: To lessen suffering and economic burden of the patient with cracking of porcelain on the fixed bridge, to decrease the chanciness and manufacture procedure of removing the porcelain fixed bridge, to discuss the feasibility of prosthesis of partial crown with aperture of neighouring surface.

目的：为减轻烤瓷固定桥修复体崩瓷患者的痛苦和经济负担，减少拆除烤瓷桥时的危险性和制作过程，探讨邻面开口式部分冠修复金-瓷固定桥崩瓷的可行性。

This disease basically is the backbone branch that kills pear tree, come on earlier bark appearance does not have apparently ill spot, from the place such as leather aperture, cicatricle, cut oozy rust lubricious drip or water having rust is abrupt and oozy, right now only useful knife cuts cerebral cortex, just see cerebral cortex show damask have Brown flyspeck or hematic filiform streak, corrupt skin is loose fill water, have lees taste, embedded and many bacterium.

此病主要为害梨树的骨干枝，发病初期树皮外表无明显病斑，从皮孔。叶痕。伤口等处渗出锈色水珠或有锈水忽然渗出，此时只有用刀削开皮层，才可见皮层呈淡红色并有褐色小斑或血丝状条纹，腐皮松软充水，有酒糟味，内含大量细菌。

The unsuspecting photographer focuses with the lens wide open to place the circle of least confusion at the sensor position b, and, taking the actual picture at a reduced aperture, he is unaware of the ensuing focus shift that prevents him from getting the best out of the lens.

一个经常使用全孔径来拍摄的摄影师会毫不犹豫地把胶片放在B点，但是如果他不改变胶片的位置，当他使用小光圈的时候，事实上，他就不可能充分利用这个镜头拍到最好的照片了。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。