象限仪

Sophisticated instruments which were to make possible the European voyages of discovery, such as the astrolabe, the quadrant, and good navigational maps, were also developed by Muslims.

复杂的仪器使得欧洲人得以进行海上探险，例如星盘、象限仪及好的航海图都是由穆斯林所发明的。

English astronomer and mathematician who invented a surveying chain, quadrant, and scale and introduced the trigonometric terms cosine and cotangent.

冈特，埃德蒙1581－1626英国天文学家和数学家，发明了测链，象限仪和标尺，并引进了两个三角学术语，余弦和余切

With the development of modern science, all kinds of pedestal platforms must be more precise . However, in the gradienter checking, the capability of the current optics quadrant instruments can not adapt to some of the pedestal platforms entirely, especially to some pedestal platforms on the ships (such as: naval ships).

随着现代科技的发展，人们对于各种基座平台的水平度精度要求越来越高，而现有光学象限仪已不能完全满足基座平台水平度的检测，特别是一些舰船上的基座平台，对于水平度精度的要求很高。

Perseid or non-Perseid. This method is applicable for major shower maxima like the Quadrantids, Perseids, and Geminids.

这个方法可以适用于大流星群，例如象限仪座流星雨，英仙座流星和双子座流星雨。

"The earliest instrument for determining latitude was the quadrant, which measured the altitude of the polestar or the noonday sun."

早期测定纬度的仪器是象限仪，测量北极星或正午太阳的高度。孔隙内水的矿化度或许是决定电阻率的最主要因素。

"The earliest instrument for determining latitude was the quadrant , which measured the altitude of the polestar or the noonday sun."

早期测定纬度的仪器是象限仪，测量北极星或正午太阳的高度。用罗盘观测。

The Quadrantid and Delta Aquarid meteor showers may also be involved.

另外，象限仪座流星雨和宝瓶δ流星雨也可能和它们有关。

The Quadrantid meteor shower and the meteor speed during the period of this meteor shower are successfully observed using the Wuhan meteor radar for the first time, and then the correlative questions of observing meteor shower using the all-sky meteor radar are also discussed.

利用武汉流星雷达，首次成功地观测了象限仪座流星雨及流星雨期间的流星速度，讨论了利用单站全天空流星雷达观测流星雨的相关问题。

The observational result shows that this Quadrantid meteor shower occurs between 0000 to 0800 local time in January 4, 2004, with meteor echoes peaking at 0400 local time. Moreover the meteor shower radiant derived from the meteor echoes plane, which is formed by the whole meteor echoes observed by the meteor radar during this shower, accords well with the theoretic radiant of this meteor shower.

从观测结果可以发现此次象限仪座流星雨发生在2004年1月4日的0000-0800LT，其中流星峰值出现在0400LT，而且通过流星雷达观测到的流星雨期间的流星回波平面推测得到的流星雨辐射点也与该流星雨的理论辐射点位置对应非常好。

Combining theoretical analysis with experimental demonstration,the mathematical models of the quadrant and the mechanical gravity- pendulum tilt sensor are built.

通过理论分析建立了象限仪读数和机械重力摆式倾斜传感器输出的数学模型，运用数学推导的方法描述了火炮耳轴倾斜随火炮纵倾的关系，从理论上阐明了用象限仪标定炮耳轴倾斜传感器产生误差的原因及其量值，通过试验进行了验证，并提出了解决方法。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。