赤经

This was also the year they introduced the prototype FCT-150 fluorite triplet apochromat and the revolutionary EM-2000 mount which used electric clutches and had a direct read out of R.A. and Dec.

这一年也是FCT-150萤石三片式APO折射镜和革命性的EM-2000型赤道仪问世的时间，EM-2000使用电子装置可以直接读出赤经/赤纬度。

Each search area is about 10 degrees in declination and one hour of right ascension.

每个搜索区域有大约包括赤纬10度，赤经一小时。

Clamp and turn the telescope around the polar axis to set the observing date on the date graduation ring to the observing time on the R.A.

松开赤经制动钮并使望远镜围绕极轴旋转用以设置日期刻度盘上的观测日期对准赤经兼小时刻度盘上的观测时点。

That's when-on the imaginary dome 圆屋顶 of sky surrounding Earth-The two planets share the same right ascension赤经, which is like celestial天上的 longitude.

这一天这两颗行星在虚构的包围地球的天穹上享有同样的赤经，赤经就好比天上的经线。

Set "0 hour" on the R.A. and hour graduation ring to the R.A. indicator after loosening the graduation-ring setscrew.

松开赤经兼小时刻度环的定位螺丝后把赤经兼小时刻度环"0小时"位置对准赤经指示箭头。

Indicator after loosening the graduation-ring setscrew.

松开定位螺丝后把赤经兼小时刻度环"0小时"位置对准赤经指示箭头。

The declination axis is set on the two ends of the inner frame in east-west direction.Using a hand-operated screw adjusting mechanism,the angle between the receive plane and the right ascension axis is controlled to be equivalent to the latitude every day.Tracking time is limited from 7 am to 5 pm,the concentrating area is 10 m~2,and the driver power is only 12 W.

自行设计了双轴调节太阳跟踪装置，其特征在于通过南北向布置的赤经轴按时钟角速度转动，同步带动一个挂在赤经轴两端的内框转动，在内框的东西框边的赤纬轴上安装有接收面支架，由手动螺旋调节机构调节接收面支架的平面与赤经转轴的夹角每天等于赤纬度。

The following conclusions are drawn. 1 The orbit parameters that have relatively greater influence on the number and latitudinal distribution of annual occultation events are orbit inclination, orbit height, Right Ascension of Ascending Node and Argument of Perigee in turn. All four parameters have little impact on the longitudinal distribution of annual occultation events. 2 The orbit inclination of Transmitting Satellite and Receiving Satellite impacts both LEO－LEO occultation events number and their latitudinal distribution most. The number of occultation events reaches the maximum as the sum of the two inclination angles nears 180 degrees. The one that far away from 90 degrees of the two inclination angles determines the latitude range of the occultation events. 3 LEO－LEO occultation events number reaches a maximum when the heights of TS and RS are the same, and it reaches the maximum when the heights of TS and RS are 600 km . 4 The RAAN of TS and RS has a great influence on the LEO－LEO occultation number, but has little influence on occultation distribution.

结果指出：1对一年掩星事件数量及其纬度分布影响大的轨道参数依次是轨道倾角、轨道高度、升交点赤经和近地点角距；而这些参数对一年掩星事件的经度分布影响都不大；2发射卫星和接收卫星倾角之间的相互关系对掩星事件数量和纬度分布影响最大，两卫星倾角接近互补时掩星事件最多，两颗LEO卫星中与90°相差较大的倾角决定了LEO－LEO掩星事件的纬度分布范围；3发射卫星和接收卫星处于同一轨道高度时，LEO－LEO掩星事件数取得极大值，发射卫星和接收卫星都采用600 km的轨道高度，一年LEO－LEO掩星事件数最多；4 发射卫星和接收卫星升交点赤经的相互关系对LEO－LEO掩星事件数量影响很大，发射卫星和接收卫星升交点赤经之差为120°或240°时掩星事件数量最多，RAAN对掩星事件纬度和经度分布影响不大；5近地点角距对掩星事件数量和分布影响都不大。

Set "0 hour" on the R.A. and hour graduation ring to the R.A. indicator after loosening the graduation-ring setscrew.

松开赤经兼小时刻度环的定位螺丝后把赤经兼小时刻度环&0小时&位置对准赤经指示箭头。

To have the telescope moved to M57, turn the R.A. slow-motion control knob or drive the R.A. motor until the R.A. and hour graduation ring is set to 18h52m.

将望远镜移向 M57，旋转赤经微调控制旋钮或驱动赤经马达直到赤经兼小时刻度环设定在18h52m 。

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。