英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:

quadrant    音标拼音: [kw'ɑdrənt]
n. 四分圆,象限,四分仪

四分圆,象限,四分仪

quadrant
象限 QUAD

quadrant
象限

quadrant
n 1: a quarter of the circumference of a circle [synonym:
{quadrant}, {quarter-circle}]
2: any of the four areas into which a plane is divided by two
orthogonal coordinate axes
3: the area enclosed by two perpendicular radii of a circle
4: a measuring instrument for measuring altitude of heavenly
bodies

Octant \Oc"tant\, n. [L. octans, -antis. fr. octo eight. See
{Octave}.]
1. (Geom.) The eighth part of a circle; an arc of 45 degrees.
[1913 Webster]

2. (Astron. & Astrol.) The position or aspect of a heavenly
body, as the moon or a planet, when half way between
conjunction, or opposition, and quadrature, or distant
from another body 45 degrees.
[1913 Webster]

3. An instrument for measuring angles (generally called a
{quadrant}), having an arc which measures up to 9O[deg],
but being itself the eighth part of a circle. Cf.
{Sextant}.
[1913 Webster]

4. (Math. & Crystallog.) One of the eight parts into which a
space is divided by three coordinate planes.
[1913 Webster]


Quadrant \Quad"rant\, n. [L. quadrans, -antis, a fourth part, a
fourth of a whole, fr. quattuor four: cf. F. quadrant,
cadran. See {Four}, and cf. {Cadrans}.]
1. The fourth part; the quarter. [Obs.] --Sir T. Browne.
[1913 Webster]

2. (Geom.) The quarter of a circle, or of the circumference
of a circle, an arc of 90[deg], or one subtending a right
angle at the center.
[1913 Webster]

3. (Anal. (Geom.) One of the four parts into which a plane is
divided by the coordinate axes. The upper right-hand part
is the first quadrant; the upper left-hand part the
second; the lower left-hand part the third; and the lower
right-hand part the fourth quadrant.
[1913 Webster]

4. An instrument for measuring altitudes, variously
constructed and mounted for different specific uses in
astronomy, surveying, gunnery, etc., consisting commonly
of a graduated arc of 90[deg], with an index or vernier,
and either plain or telescopic sights, and usually having
a plumb line or spirit level for fixing the vertical or
horizontal direction.
[1913 Webster]

{Gunner's quadrant}, an instrument consisting of a graduated
limb, with a plumb line or spirit level, and an arm by
which it is applied to a cannon or mortar in adjusting it
to the elevation required for attaining the desired range.


{Gunter's quadrant}. See {Gunter's quadrant}, in the
Vocabulary.

{Hadley's quadrant}, a hand instrument used chiefly at sea to
measure the altitude of the sun or other celestial body in
ascertaining the vessel's position. It consists of a frame
in the form of an octant having a graduated scale upon its
arc, and an index arm, or alidade pivoted at its apex.
Mirrors, called the index glass and the horizon glass, are
fixed one upon the index arm and the other upon one side
of the frame, respectively. When the instrument is held
upright, the index arm may be swung so that the index
glass will reflect an image of the sun upon the horizon
glass, and when the reflected image of the sun coincides,
to the observer's eye, with the horizon as seen directly
through an opening at the side of the horizon glass, the
index shows the sun's altitude upon the scale; -- more
properly, but less commonly, called an octant.

{Quadrant of altitude}, an appendage of the artificial globe,
consisting of a slip of brass of the length of a quadrant
of one of the great circles of the globe, and graduated.
It may be fitted to the meridian, and being movable round
to all points of the horizon, serves as a scale in
measuring altitudes, azimuths, etc.
[1913 Webster]

51 Moby Thesaurus words for "quadrant":
adjunct, astrolabe, azimuth circle, azimuth compass, bevel,
bevel protractor, bevel square, clinometer, component, contingent,
crescent, cross section, detachment, detail, division, dole,
fraction, goniometer, graphometer, half circle, hemicycle,
installment, item, pantometer, parcel, part, particular,
percentage, portion, protractor, quarter, quota, radiogoniometer,
random sample, remainder, sample, sampling, section, sector,
segment, semicircle, sextant, share, subdivision, subgroup,
subspecies, theodolite, transit, transit circle,
transit instrument, transit theodolite



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • QUADRANT中文 (简体)翻译:剑桥词典 - Cambridge Dictionary
    The 20 data lanes are divided onto four quadrants of 5 lanes each The positive signs should be taken for the second and fourth quadrants The basic structure consists of four quadrants divided by waterways or pathways
  • Quadrant (plane geometry) - Wikipedia
    Quadrant (plane geometry) The four quadrants of a Cartesian coordinate system The axes of a two-dimensional Cartesian system divide the plane into four infinite regions, called quadrants, each bounded by two half-axes The axes themselves are, in general, not part of the respective quadrants
  • Quadrant - 搜索 词典
    4 Each subject 's expectations can be classified into a quadrant: external - stated, external-perceived, internal -stated, or internal -perceived 每个 主题 的 期望 能够 划分 到 一个 象限: 外部 明确 、 外部 领会 、 内部 明确 或 内部 领会。
  • Shop All – Quadrant
    XL XXL NEW New Era 9Twenty Core Cap - Sage£30 Quadrant Core Cropped Hoodie - Marina Blue£70 XXS XS S
  • Quadrant | F1 Content, Apparel Partnerships
    Watch your favourite drivers, shop exclusive apparel, and join the next generation of racing culture
  • 象限 - 百度百科
    象限(Quadrant),是平面直角坐标系(笛卡尔坐标系)中里的横轴和纵轴所划分的四个区域,每一个区域叫做一个象限。 主要应用于三角学和复数中的坐标系。 象限以原点为中心,x,y轴为分界线。
  • Quadrants in Geometry - GeeksforGeeks
    A quadrant is defined as a region in space that is divided into four equal parts by two axes, namely the X-axis and the Y-axis in the Cartesian Plane These two axes intersect each other at 90°, and the four regions so formed are called the four quadrants, namely the I-quadrant, II-quadrant, III-quadrant, and IV-quadrant
  • Quadrant
    Quadrant is the worldwide leader in the magnetic industry Our portfolio of products, services and technologies solve customer challenges in magnetic applications From design, R D, prototype validation to mass production, Quadrant provides a one-stop solution for magnetic applications
  • 杭州象限科技 - Quadrant
    象限科技借助丰富的制造经验和先进的设备,为磁性产品的设计、建模、试样和优化提供完整的工程支持,不断地提升磁性材料的功能性并融入为客户提供的产品中。 象限科技提供量身定制的产品开发和制造服务,以满足客户的定制需求。 我们配备了各种先进的加工工具并设置了夹具迭代期限,如定制装配线和MES制造系统。 象限科技为客户设计并制造分立和集成化磁化系统, 在组件多级充磁、磁通精确控制、制造流程简化方面拥有独特的经验,能够确保最大限度优化产品充磁强度。 象限科技在行业中处于领先地位,提供快速推动世界发展的尖端磁性技术。 确保产品在任何时间点都能够满足客户的需求是我们的使命。 象限科技提供从产品原型到迭代开发的全方位磁性技术服务解决方案。
  • quadrants - 搜索 词典
    "Quadrants" is merely short hand for first -, second -, and third- person perspectives





中文字典-英文字典  2005-2009