双位置

This kind of gyro uses twoposition force feedback balance method and complementary angle correction method to eliminate the effect of gyro constant drift to improve the precision of bearing calcuation .

介绍一种数字式寻北陀螺仪，它立足于国内现有条件，以计算罗经原理为基础，采用双位置力反馈平衡法和补角修正措施，用来消除陀螺常值漂移的影响以提高方位计算精度。

It solves the problem that the unitary contour presentation can not correctly extract face contour in a face image which suffers from scale, rotation etc. The definition of the internal and external energy function is provided. At the same time, the global matching algorithm and local matching algorithm is given. The experiment shows that this presentation and the accompanying matching algorithm can be used to extract the face contour very well. So the image segmentation can be implemented by using it.②By analyzing the recognition principle of PCA method, we can conclude that the face images coming from different surrounding consist of different face image space. This is the essential reason that makes the generality of PCA method worse. Also, we give a measurement means to measure the distance from different face image space, so we can analyze face image space more conveniently.③We also construct various scale models and rotation pose models to detect the scale and rotating angle of face image to be recognized. The experiment results show that the detecting precision is very high. So it is good for face image feature extraction and face image representation.④Similarly, we construct local feature models of face image and utilize them to detect the local feature of face image. At the same time, we put forward a novel face image local feature detection algorithm, locating step by step. The experiment results show that this method can accurately detect the location of local face feature in a image.⑤A novel face image presentation model, dual attribute graph , is put forward. Firstly, it utilizes attribute graph to present the face image, then exact the local principal component coefficient and Gabor transform coefficient of thc pixels which corresponds to the nodes of the graph as the attribute of the nodes. This representation fully makes use of the statistical characteristic of the local face feature and utilizes Gabor transform to present the topographical structure of face image. So DAG has more general property.⑥Based on the DAG presentation, we give a DAG matching function and matching algorithm. During the design of the function and algorithm, the noise factor, e. g., lighting, scale and rotation pose are considered and tried to be eliminated. So the algorithm can give more general property.⑦A general face image recognition system is implemented. The experiment show the system can get better recognition performance under the noise surrounding of lighting, scale and rotation pose.

本文在上述研究的基础上，取得了如下主要研究成果：①构造了一个通用的人脸轮廓模型表示，解决了由于人脸图象尺度、旋转等因素而使得仅用单一轮廓表示无法正确提取人脸轮廓的问题，并给出了模型内、外能函数的定义，同时给出了模型的全局与局部匹配算法，实验表明，使用这种表示形式以及匹配算法，能够较好地提取人脸图象的轮廓，可实际用于人脸图象的分割；②深入分析了PCA方法的识别机制，得出不同成象条件下的人脸图象构成不同的人脸图象空间的结论，同时指出这也是造成PCA方法通用性较差的本质原因，并给出了不同人脸空间距离的一种度量方法，使用该度量方法能够直观地对人脸图象空间进行分析；③构造了各种尺度模板、旋转姿势模板以用于探测待识人脸图象的尺度、旋转角度，实验结果表明，探测精确度很高，从而有利于人脸图象特征提取，以及图象的有效表示；④构造了人脸图象的各局部特征模板，用于人脸图象局部特征的探测；同时提出了一种新的人脸图象局部特征探测法---逐步求精定位法，实验结果表明，使用这种方法能够精确地得到人脸图象各局部特征的位置；⑤提出了一种新的人脸图象表示法---双属性图表示法；利用属性图来表示人脸图象，并提取图节点对应图象位置的局部主成分特征系数以及Gabor变换系数作为图节点的属性，这种表示方法充分利用了人脸图象的局部特征的统计特性，并且使用Gabor变换来反映人脸图象的拓扑结构，从而使得双属性图表示法具有较强的通用性；⑥在双属性图表示的基础上，给出双属性图匹配函数及匹配算法，在函数及算法设计过程中，考虑并解决了光照、尺度、旋转姿势变化等因素对人脸图象识别的影响，使得匹配算法具有较强的通用性；⑦设计并实现了一个通用的人脸图象识别系统，实验结果表明，该系统在图象光照、尺度、旋转姿势情况下，得到了较好的识别效果。

The airlineadded a dual-position footrest to support danglingfeet and give passengers a leg up.

改造，比如添加了双位置脚垫来支撑垂悬的双脚，对于那

You can use this discontinuous-control mode to reduce the cycling behavior, overshoot, or undershoot inherent in the two-position mode.

使用这种间断控制器模型减少双位置模型固有的循环行为、超过目标或未达目标。

In fact, however, it is usually speedier to use some other mode when the two-position mode is unsatisfactory.

然而实际上，双位置模型不能达到满意的时候，使用其它模型通常更快。

A logical extension of the two-position control mode is to provide several—rather than two—intermediate settings of the controller's output.

双位置控制器模型的合理扩展是能够提供若干个控制器输出的中间设定。

The influences of gyro constant drift and accelerometer bias on alignment precision are eliminated by the two-position alignment method.

双位置对准方案，消除了陀螺常值漂移和加速度计零偏对对准精度的影响。

In the analog domain, the basis for the basic implementation of a two-position controller is an analog comparator or an open-loop operational amplifier.

在模拟域，双位置控制器的主要部分是模拟比较器或开环运算放大器。

To study the fast initial alignment of ring laser gyro strapdown inertial navigation system for land vehicle, the two-position alignment technology was adopted, the principle and software flow of the method were presented, the alignment precision was tested and the error sources having influence on alignment precision were analyzed.

研究车载激光陀螺捷联惯导系统的快速初始对准技术。采用双位置对准的技术方案，给出了双位置初始对准的基本原理及软件流程，对对准精度进行了实际测试，并对影响对准精度的误差源进行了分析。

The sixth chapter will discuss the initial alignment of the Marine SINS theoretically. First, the error characters of initial alignment will be analysed, then, a new two-position alignment method together with the realization of the estimation of the gyroscopes' random constant drifts will be presented.

第四部分从理论上着重讨论了舰载捷联式惯导系统的初始对准问题，对初始对准的误差特性进行了较深入的分析，提出了可在初始对准的同时完成对陀螺仪随机常值漂移估计的双位置对准方法，并对该方法进行了理论分析，可行性分析和仿真计算分析。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了