数一数

In this coding scheme, each of the digits(0-9)in the decimal system is coded as a four-digit binary number, and these binary number are added in sequence as in the decimal number system.

在这个编码方案，每一项数字（ 0-9 ）在小数制编码为4位数二进制数，而这些二进制数已加入顺序，在十进制数系统。

Our test showed that defoliation to theextent of 1/4 was most effective.

对夏播苦瓜采取摘叶处理是一种有效的植株调整方式，我们的试验结果表明株洲长白苦瓜摘叶1/4是最有效的方法，使植株的雌花数和♀/♂比值都显著提高，单株实收果数和总果量也都提高；但摘叶过多，如摘叶1/3和1/2，反而使雌花数减少，产量下降。

The research on the CCD sensor information is used to determinate the satellite attitude system without gyroscope .(1) Using quaternion and MRP as attitude representation , the attitude kinematics function are established . The satellite attitude dynamics function is established,that is disturbed by the first-order Markov force moment.(2) Using the quaternion as attitude representations, the attitude determination state estimator EKF and UKF are designed , numerical simulation is done .

基于CCD星敏感器的无陀螺测量卫星姿态确定系统的研究(1)针对地球同步轨道卫星，分别建立了以姿态四元数和修正罗德里格参数为卫星姿态描述参数的姿态运动方程；建立了卫星受一阶马尔柯夫干扰力矩时的卫星姿态动力学方程；(2)设计了采用姿态四元数为卫星姿态描述参数的EKF和UKF估计器，设计了分别以姿态四元数和修正罗德里格参数为卫星姿态描述参数的UKF估计器，并进行了数学仿真。

The concepts of interval grey number and the rules of four fundamental operations of interval grey number are simply stated, and then the distributive law for multiplication of interval grey number at some conditions is put forward and the distance between two interval grey number is defined.

第三章，简述了区间型灰数的概念及运算规则，给出了关于同性单性区间型灰数分配律定理，定义了区间型灰数的距离，然后利用最优化原理建立了灰关联模式识别公式，从而形成了一种新的灰关联模式识别方法。

Secondly, the main principium and method of the maximum possibility estimation theory were discussed.

本文首先介绍可能性理论和模糊数的相关概念，为极大可能性估计理论研究奠定理论基础，并构造了一种新的模糊数——对数模糊数。

The procedure estimating the regularization parameter is the same as that the adaptive Marquardt algorithm used. The Frechet derivative is directly derived from the forward methods: SAM and FEM. With the theory of SAM and Zhang′s geometric factor, the relationship between the Frechet derivative and the geometric factor is established, at the same time, one useful corollary is given, i.

选取正则化因子时，沿用自适应的Marquardt算法中阻尼因子的选取计算方法；计算Frechet导数时，根据逐次逼近解法和张氏几何因子理论，推导出了Frechet导数与张氏几何因子的关系，得出了Frechet导数为张氏一阶积分几何因子的结论。

The processing principle and method of slotting gear--grooves for big modulus gear wheel with combined milling cutter on a large--scale hobbing machine was put forward in the paper.

提出了在大型滚齿机上。用片铣刀组粗切大模数齿轮齿槽的原理及其工艺。使大模数齿轮的加工效率提高1～2倍。为大模数齿轮的高效加工开创出一条新的途径

The definition, operation, properties, geometric meaning of quaternion and its three expressions are discussed. It is also demonstrated how to use quaternion to transform points.

本文详细叙述了四元数的这一功能，讨论了四元数的定义、运算、性质、几何意义和它的3种表达形式，给出了使用四元数处理点的各种几何变换的一般结论。

Based on a brief review on developments of number system, a new developed pattern is proposed. The quaternion is extended to a matrix form aI+bA+cB+dC, in which the identity matrix I and three special matrices A, B, C correspond to number 1 and three units of imaginary number i, j, k, respectively.

在数系发展的基础上，提出了一种新的发展模式：四元数推广为矩阵形式aI+bA+cB+dC，其中单位矩阵I和3个特殊矩阵A，B，C分别相应于数1和虚数单位i，j，k。

The norm and the angle made with the center line by the vector of the codeword are computed for each codeword off-line firstly, then the codewords are ordered according to the ascending order of their norm.

文章提出了一种改进的等范数最近邻码本矢量搜索算法，该算法预先离线计算好各码本矢量的2-范数和它与中心线的矢量夹角，再根据各码本矢量的2-范数进行升序排列。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。