查询词典 zero method

The present invention relates to a method for heuristically starting up DC brushless servo electric machine, including the following steps of (1) after powerup of an increment type photoelectric encoder, electrifying a stator winding two by two with identical time interval to generate six-directional stator winding resultant magnetic fields;(2) detecting six different angles rotated by the rotor within identical tiny time interval by the photoelectric encoder;(3) selecting most positive value rotation angle from the six different angles, and determining maximum torque corresponding to the stator winding resultant magnetic field, and implementing servo startup using the maximum torque as constant starting torque;(4) after the zero-point signal of the photoelectric encoder occurring, switching to servo operation with normal constant torsion.

本发明直流无刷伺服电机试探启动方法，采用如下步骤：(1)增量式光电编码器上电后对定子绕组采用相同的时间间隔两两通电，顺序产生六个方向的定子绕组合成磁场；(2)由增量式光电编码器检测出转子在相同的微小时间间隔内分别转过的六个不同的角度；(3)从转子六个不同的角度中选出最大正值的转角，确定相应定子绕组合成磁场对应的最大转矩，并以该最大转矩为恒定启动转矩进行伺服启动；(4)当增量式光电编码器零点信号出现后，切换为正常恒转矩伺服运行。

D start-up acceleration model for some kind of missile-used turbojet engine as well as its resolving method is established, and aero-thermodynamic simulation code based on zero-dimensional model is completed.

针对零维模型，为某航空发动机建立了动态的启动加速模型，并给出求解方法，完成了启动加速过程的气动热力计算程序。

Are uniformly bounded. By Lyapunov method, the tracking error is proved to be asymptotically converging to zero.

通过理论分析，证明了跟踪误差收敛到零。

In order to improve the robustness of time delay filter, vector diagram and zero placement method are applied to design robust time delay filter.

并当系统的模型参数未知时，提出了自适应时滞滤波器的方法，通过在线辨识系统的模型参数，来实时校正滤波器的脉冲幅值和时间，以适应系统参数不确定的情况。

Vector synthetic method has high measure precision but reference energy meter needs to be connected to zero point of reference meter and system.

三表法测量无间断点，校验过程中需改变电流元件接线；矢量法采样精度高，校验时需标准表与系统电压中性点连接；两表法测量有间断点，校验时需改变电压元件接线。

Based upon the MODIS LST product, a linear regression correction equation with zero intercept function is established for Landsat/TM LST results retrieved by Jimenez-Muoz et al's single-channel method and Qin et al's mono-window algorithm.

对两算法反演的Landsat/TM LST结果进行了比较，并与MODIS LST建立了线性纠正方程。

In this dissertation , the main works of the author is follows:(1)The method FPI (Fast Plaintext Imbedded to the divisor) is improved, which makes the probability of the plaintext not be imbedded into the divisor nearly to zero and its velocity is fast.

在本论文中，作者主要做了以下几个方面的工作：(1)改进了明文嵌入超椭圆曲线除子的FPI(Fast Plaintext Imbedded to the divisor)方法，该方法使明文不能嵌入到超椭圆曲线的除子的概率几乎为零，且其速度较快，可用于椭圆曲线密码体制。

In this paper, a method about a priori determination of the superfluous zero energy element modes and its sufficient condition is presented by means of quasi-conforming element technique 〔1〕.

本文应用拟协调元〔1〕思想，提出一个关于单元多余零能模式"前判断"的方法。

The problem of the determination of the final geometry of the single-layer reticulated shell with zero element internal force is also successfully solved by using this method. Based on the research on the shape determination theory a conclusion has been obtained: the distribution of the initial self-internal-force vector determines the initial shape of an assembly which has form finding problem.

通过对形状确定问题的研究，可得出如下的结论：体系自应力分布矢量的方向决定体系初始态几何；体系自应力分布矢量的大小只影响体系的零状态几何；体系各个单元的截面尺寸设计也将影响体系的零状态几何。

This paper sets forth non zero element dynamic memory trigonometric decomposition method of large scale sparse positive definite normal equation, which is regular, simple and intuitive, and therefore it is ease to realize in the computer.

本文针对具有正定性质的大型稀疏法方程，提出了大型稀疏正定法方程的非零动态存储三角分解法，运用复式链表来动态存储稀疏矩阵。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。