Based on the unit quaternion representation of orientations of the 6/6-SPS Stewart manipulator,an analytical expression that represents the orientation-singularity locus of the manipulator at a fixed position is derived and examples are given to illustrate the result.
基于单位四元数表示并联机构动平台的姿态,推导出当6/6-SPS型Stewart并联机构动平台处于固定位置时机构姿态奇异轨迹的解析表达式,并通过计算机仿真给出姿态奇异轨迹的三维可视化描述。
The concept of quaternion and its operation rules were introduced first, then formulae for space resection based on unit quaternion were deduced.
介绍四元数的概念及运算性质,提出基于单位四元数的空间后方交会解算方法并给出计算公式。
Firstly the unit quaternions are used to describe rotation matrix in the algorithm.
本算法采用单位四元数描述旋转矩阵,然后对严格的共线条件方程进行线性化,并按照带有约束条件的间接平差进行迭代解算。
The upper quartile is that value above which 25 per cent of the observations lie.
上四分位数是25％的观察值位于其上的值。
is the array or cell range of numeric values for which you want the quartile value
用来计算其四分位点的数值数组或数值区域
is a number: minimum value = 0; 1st quartile = 1; median value = 2; 3rd quartile = 3; maximum value = 4
数字，按四分位从小到大依次为0到4
Convert the fraction9/38 to a decimal. Round to four decimal places.
将分数9/8转换成小数。四舍五入到小数点后四位。
The number2001 contains four digits.
2001是个四位数。
The SUA data was consistent with the skewness distribution and described by Median± quartile.
③血清尿酸数据呈偏态分布,以中位数±四分位间距表示。
Quartiles pide the data into four equal parts.
四分位点资料分成四等分。
Results SUA in quartile positively correlated with increasing IMT and severity of plaque in the elderly.
结果血尿酸四分位组分析显示,随分位数增加,老年人颈动脉IMT及斑块严重程度增加。
O' Neal flirted with the first quadruple-double in Finals history with 28 points,
欧尼尔几乎在决赛历史创下第一次四项双位数的纪录，他拿下28分，
The Error Analysis on Position,Velocity and Acceleration of Space Four-bar Linkages by Means of Complex Number Vector
空间四杆机构位置、速度和加速度误差分析的复数向量法
(football) the person who plays quarterback.
（足球）打四分卫位置的人。
The entire fourth phase actually contains four plots, with a total of 174 units, including detached, semi-detached villas, town houses and commercial spaces.
整个第四阶段其实共有四个地段，单位总数是174个，分独立、半独立洋房和排屋、店屋。
In establishing the number of seats to be filled, remainders after pision by four shall be disregarded.
在确定席位数目时，用四除后余数不计。
These should be four undetermined constants in the displacement function.
位移函数中应有四个未定常数。
Four components contribute to rice grain yield including the panicles per unit area, the number of spikelets, the percentage of, and the weight of ripe grains.
四个水稻籽粒产量构成因素为单位面积穗数、小穗数、成熟籽粒百分数和成熟籽粒重量。
Specifies if the century is displayed as four or two digits.
指定公元年份是显示为四位数还是两位数。
The number of Taiwanese investment enterprises and the amount of agreed investment ranks third and fourth respectively among foreign business invested enterprises in the whole city.
台资企业数和协议投资额分别列全市外商投资企业的第三位和第四位。
Earlier, when we calculated the range, the interquartile deviation, and average absolute deviation, the answers were expressed in the same units as the data itself.
当我们计算极差，四分点离差和平均绝对偏差时，答案的计量单位与数据单位量相同的。