无定向

A control system of bearingless induction motor based on torque winding air gap field oriented vector control is accomplished.

实现了一种基于转矩绕组气隙磁场定向控制的无轴承异步电机控制系统。

Firstly, four beams are formed using wideband distortionless beamforming method, which divides the whole space into four separated regions. Then the beam outputs are calculated and taken as the signal received by a reference point.

该方法首先预形成指向4个方向的宽带无失真波束，各自的主瓣区域把整个空间分为4个不同的测量区，然后分别将这4个波束形成器的波束输出作为参考点接收到的声信号，利用基于时延的定向方法定向处于不同测量区的声源。

Using the flanker task of different conflict levels combined with endogenous and exogenous cues,this research examined whether there were response inhibition deficits and modulatory effects of spatial attention on the flanker task of different conflict levels in ODC patients.

使用内外源线索结合不同冲突水平的侧抑制任务，考察强迫症患者对分心刺激的抑制有无缺陷、注意定向对分心刺激的干扰效应有无调节作用及在何水平上发挥作用。

After studying the theory of combined signal processing with acoustic pressure and particle velocity, a method of direction estimation underwater, which is based on intensity measurement using an acoustic vector sensor, is presented. In the low frequency field with kinds of line-spectra, azimuth angle estimation is achieved based on the probability density statistics and bar graph approach. It can preferably resolve the problem of left/right bearing resolution and estimate the direction of space.

为了对水下目标进行定位，基于声压与振速联合信号处理的理论，研究了复声强法对水下目标信号的定向技术，并使用概率统计和直方图的理论对目标的方位角和俯仰角值进行了估计，在线谱分量存在的低频段对估计角度进行了概率统计，较好地解决了左右舷的分辨问题，实现目标的全空间无模糊定向。

When used alone, nepetalactone attracted mosquitoes to the trap of the olfactometer, however, when mixed with human odor or a L-lactic acid dichloromethane solution, nepetalactone inhibited the attractiveness obviously. Nepetalactone exhibited a spatial repellency, but was not an ideal topical repellent. DEET did not have the attractiveness to mosquitoes, and did not exhibit inhibition on L-lactic acid dichloromethane solution too, hut enhanced the attractivity of human odor to mosquitoes.

风洞定向行为测试结果表明，假荆芥内酯单独作用时，对蚊虫有微弱的引诱效果，但在人体气味及二氯甲烷L-乳酸存在时，可显著抑制这些引诱物对蚊虫的引诱效果，是优良的空间驱避剂；DEET对蚊虫无明显的引诱作用，对二氯甲烷L-乳酸溶液引诱剂也无明显的抑制效果，但可显著增强人体气味对蚊虫的引诱性。

It is known that the simultaneous estimation of speed and rotor resistance is very difficult, and it is impossible to estimate them simultaneously under the steady state based on indirect vector control.

以稳定性讨论为依据，应用自适应控制理论，融入模糊逻辑和人工神经网络的方法，提出了一种无速度传感器控制的方案，解决了影响转子磁场定向无速度传感器控制低速性能的两对难题：同时估计定子电阻与输出电压、同时估计转速与转子电阻。

We show that degree-correlated scale-free networks are robust to random stimuli as well as the uncorrelated scale-free networks, while assortative scale-free networks are more sensitive to directed stimuli than uncorrelated networks.

我们的研究表明：度关联无标度网络过对随机刺激鲁棒，这一点与度无关网络一样；但是匹配无标度网络对定向刺激的敏感性比度无关网络更强。

The speed-sensorless vector control and the identification of motor parameters in this paper are the two novel research of vector control.Using asynchronous machine's mathematic model in three-phase static reference frame, this paper has derived it's mathematic model in two-phase static reference frameand in two-phase rotating reference frame, and got the coordinate transformance formulus based on the constant magnetic force and power force, by compared different field orientation methods, we can find that field orientation at rotor field can realize the decoupling of the stator current flux component

无速度传感器矢量控制和电机参数辨识是矢量控制的两个新的研究方向，本文利用异步电机在三相静止坐标系下的数学模型推导出两相静止坐标系、两相同步旋转坐标系下的数学模型，根据磁动势守恒和功率守恒的原则，得出各坐标变换公式；通过不同磁场定向方式的比较发现，异步电机按转子磁场定向时定子电流励磁分量和转矩分量可以比较方便地实现解耦。

Gas molecules move freely among one another. The result is gas molecules diffuse from high-pressure area toward low-pressure area. The process is called gas diffusion.

气体分子不停的进行着无定向的运动，其结果是气体分子从分压高处向分压低处发生净转移，这一过程称为气体扩散。

In order to save work-time and not to affect the production, using the underground traverse survey without orientation, it can recover this segment traverse.

应用井下无定向导线测量，就可以利用尚存的导线点恢复该段导线，满足生产需要。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。