角直径

临边昏暗在恒星角直径测量中的影响

Limb-darkening effects of stellar angular diameter measurement

本文讨论了自1978年8月到1980年8月所测定的金牛座a星的角直径。

The values of the angular diameter of a Tau observed from Aug. 1978 to Aug. 1980 are discussed .

在这一观测周期中，我们没有发现角直径随时间变化的现象。

We have not found any changes of observed values of the angular diameter with time in this period .

我们可以取中心衍射环的角直径作为角分辨率的一种自然极限。

As a natural limit for angular resolution , one may take the angular size of the central diffraction disk .

这些记录可以按古人目视观测天象的天球模型进行视大小（角直径）的量化，进而可以用一些已知亮度的流星记录为标准点，将其归算为亮度。

These records can be quantified to apparent scales ( angular diameter ) according to the Model of Celestial Sphere used by Chinese ancients . Then we can reduce the size to a brightness on the basis of some " standard points " .

模拟失重大鼠延髓FOS蛋白表达及脊髓侧角神经元直径的变化

Fos expression in the neurons of medulla oblongata and changes of neuron size in the intermediolateral nucleus of the spinal cord during simulated weightlessness

Pin植入角、直径以及植入密度是压缩和剪切性能的主要影响因素，而端部斜切角及空间布局的影响可忽略。此外，横向面内pin对剪切性能的贡献较小。

Among all parameters , pin insertion angle , pin diameter and pin density are primary for compression and shear properties , while the oblique angle and pin layout could be neglected except that pins on transverse plane about shearing load have little contribution to the shear behavior .

对风机进口流场，集风器的当量收缩角，直径及型线，与叶轮前板的匹配；

About the streamlining of inlet field , the equivalent reduction angle , the diameter and the curvature of the inlet throat and its conjugation with impeller shroud plate ;

用数码显微镜测量硅硼玻璃在可伐合金表面的接触角和润湿直径，用SEM研究晕圈的表面形貌以及玻璃和金属的截面形貌，并用能谱分析不同晕圈处的化学成分。

The surface micrographs of halo and cross-sections of glass and kovar were investigated by SEM , and the chemical composition of halos was studied by EDS analysis .

通过仿真得出：液控口阻尼孔直径、阀芯锥角、立柱直径、供液管路直径、顶梁及立柱刚度对立柱卸载冲击影响明显。

Through the simulation concluded that : hydraulic damping hole diameter , cone angle valve , column , liquid supply pipe diameter , top beam diameter and column stiffness on column uninstall impact significantly .

测得了喷嘴流量、喷雾角、雾滴直径与压力的变化关系，以及雾滴粒径和喷嘴径向喷雾通量的分布情况。

The experiments show that the working fluid pressure and the size of the nozzle aperture have effect on the nozzle flow capacity , the droplet size and its distribution , the spray angle and the radical distribution of the spray flux .

本文给出一种根据牙轮钻头结构参数间的几何关系分别计算牙轮半径，牙爪轴倾角，牙掌基准尺寸，牙轮背锥角和钻头直径的方法及程序。

In this paper , a simple method and procedure is given by which cone radius , journal angle , diameter and leg datum point size of a rock bit can be calculated respectively according to geometric relations of rock bit structure parameters .

惠特科姆也研究过狼蛛&一种平均相当于二角五分硬币直径的常见田间品种。

Whitcomb also has worked with wolf spiders , a common field variety averaging about the diameter of a quarter .

通过减小接触角、增大钢球直径和采用满球设计提高其承载能力；

The bearing capacity is increased by reducing contact angle and increasing steel ball diameter and adopting full complement ball design .

给出了三个主要几何参数即球窝外包角、供气孔直径和供气孔数的合理取值范围。

The reasonable value of configuration parameters including exterior angle of socket , orifice diameter and number of supply hole were confirmed .

对比主喷嘴、扩压室扩散角、混合室直径及长度等参数对喷射器性能的影响，并通过改变工作流体的进口压力进一步验证所得结论。

The effects of diffusion angle of the main nozzle and the diffuser , diameter and length of the mixer on the ejector performance were compared , and then the high-side pressure .

结果表明，磁力金属带传动的传动比随磁感应强度、初张力及中心距的增大而增大，随围包角及小带轮直径的增大而减小。

The results show that the transmission ratio of magnetic metal belt transmission increases when magnetic induction density , initial tension and center distance increases , and decrease when angle of contact and diameter of the smaller belt pulley increases .

阐述了辊筒磨的结构和工作原理，并对辊筒磨的物料拉入角、筒体直径、磨辊直径以及入料平均粒度等结构参数进行了优化分析和确定。

The paper describes roller mill about its structure and working principle , makes analysis and determination to optimization of such parameters as pull-in angle for material , diameter of cylinder , diameter of roller and average granularity for feeding .

利用Pro/Mechanic对鼓形齿端齿盘齿廓的弹性变形进行有限元分析，确定了齿廓弹性变形与压力角和齿面直径的关系。

The dissertation analyzes the elastic deformation of tooth form of end-tooth indexing table with drum tooth by means of Pro / Mechanic , and ascertains the relationship between elastic deformation of drum tooth to pressure angle and diameter of tooth face .

在室内模拟实验装置上，采用粒级效率进行了旋流器的小锥管锥角、溢流口直径、底流口直径、底流直管段长度和入口当量直径等尺寸筛选实验。

A size selection test was made of the cone angle of the small cone tubes , of the diameter of the overflow mouth , of the length of the underflow straight pipe , of the equivalent diameter of the inlet using particle efficiency in an indoor simulation test apparatus .

Miyawaki发现高角患者微型种植体脱落率高，认为高角患者应该选择直径较大的微型种植体，以增加种植体-骨接触面积，来提高其稳定性。

Miyawaki found that micro-implants implanted in high-angle patients appeared a high expulsion rate , he suggested that high-angle patients should have been chosen a bigger diameter mini-implants to increase the implant-bone contact area so that increase its stability .

又在六角螺帽顶端设置内多角，其径与内多角螺丝工具直径相适应。

An internal polygonal is arranged on the top of the hex nut ; diameter of the internal polygonal matches with the diameter of an internal polygonal screw tool .

含与定直径成45°角并贯穿轴向裂纹的试件，破裂亦呈张开型，其裂面始于裂纹前缘，但却折转约45°角与定直径近于平行；

To the specimen having a crack at 45 ° along the axial direction , the fracture is also of stretching type and its face starts at the leading edge of the crack but turns 45 ° to the near parallel direction and parallel to the fixed diameter ;