头测量法

In order to replace the conventional method of vagina palpation which has been widely used in obstetrics, a new method for detecting fetal head position and cervical dilation automatically is proposed based on the analytic geometry of space and ultrasonic triangulation.

基于空间几何原理和超声多普勒三角测量法，提出了一种胎头位置、宫颈扩张的自动测量方法，以替代产科临床使用的传统手工触诊法。

In the present study we examine the relationship between pharyngeal collapsibility and cephalometric variables in a group of 57 male OSA patients.

本文观察57例男性OSA患者咽部塌陷与头测量法测定参数之间的关系。

Moreover, to the surface measured not parallel with the video gauge, the depth focus method was described which was based on Focused Image Surface and Shape-Form-Focus .

另外，对于与视觉坐标测量机的测头测量平面不平行的表面，本文设计了调焦形貌法和正焦图像表面相结合的深度聚焦方法。

To assess the condition of arc quenching chamber of circuit breaker without disassembly itself, Dynamic Resistance Measurement is introduced in this paper.

介绍了一种不用打开灭弧室就可以评估断路器灭弧室状况的方法———动态电阻测量法，用此法很容易判断弧触头的烧损数值。

Methods The effects of the reading error and the misalignment of the probes on the accuracy of measuring and all the harmonics of roundness were analyzed; The strategy and the algorithm for optimizing the parameters of the measuring system were proposed; The distribution and propagation patterns of the measured errors for all the harmonics of roundness were studied in detail; A software for correcting the errors caused by the measurement error of the angle positions of the probes and the sensitivity difference between three probes was presented.

分析了测头读数及角位置误差对圆度各次谐波及圆周各点测量精度的影响；提出了三点法测量系统的优化策略与算法；研究了三点法测量误差的分布与传递规律；提出了克服测头定位误差以及3个测头的灵敏度不一致影响的软件校正方法。

The algorithm for optimizing the parameters of the measuring system were proposed; The distribution and propagation patterns of the measured errors for all the harmonics of roundness were studied in detail; A software for correcting the errors caused by the measurement error of the angle positions of the probes and the sensitivity difference between three probes was presented.

分析了测头读数及角位置误差对圆度各次谐波及圆周各点测量精度的影响；提出了三点法测量系统的优化策略与算法；研究了三点法测量误差的分布与传递规律；提出了克服测头定位误差以及3个测头的灵敏度不一致影响的软件校正方法。

Objective To guide the orthodontic diagnosis, treatment planning and prognosis by analyzing the craniofacial morphology and reimbursement mechanism of young patients with mandibular retrusion in Chongqing territory by Delaire cephalometric analysis.

目的 采用Delaire头影测量法分析重庆地区青少年下颌后缩患者颅颌面硬组织特征及其补偿机制，为进一步诊断、治疗设计及预后分析提供参考。

Meanwhile we measured the skeletal classⅢocclusion and mandibular retrusion patients by traditional cephalometric analysis and the Delaire cephalometric analysis. We discovered the Delaire cephalometric analysis was more accurately and conveniently. This method can help us to understand the cranio-maxillo-facial structure compensatory mechanism of the skeletal classⅢocclusion and mandibular retrusion patients, which can provide reference for diagnosis, project and orthodontic treatment.

同时，传统头影测量方法与Delaire头影测量分析法对骨性Ⅲ类与青少年下颌后缩畸形行测量，发现Delaire头影测量分析法更直观、定量，利于明确骨性Ⅲ类错牙合与青少年下颌后缩畸形颅面骨骼结构补偿机制，更易辅助正畸诊断、设计，也为相应的临床治疗方法改良提供依据。

The conditions to measure accurately and the principles to select parameters of the multi— probes EST method are proposed, and the theoretical research, computer imitation and the experiment on a machine tool prove that these principles and suggestion are necessary and effective. The influence of the initial value errors of the probes, the installation error of the probes system, and the remaining error caused by the radical error motion are analyzed quantitively on the measurement accuracy of the multi—probes EST method. The influence of the error caused by the probe's axes which is not in a plane and the perpendicularity error of the plane which the probe's axes is in to the stational axis are discussed on the measurement results.

结合理论分析，对这些EST方法进行了计算机仿真分析和研究，重点研究了这些方法的应用条件和误差分离精度，所得出的结论是：三测头法EST基本上能实现各项误差的完全分离，适于在位测量使用；二测头法在恰当地选择测头安装角的条件下，可以得到较高测量精度，适于大型零件圆度、圆柱度、径向圆跳动和全跳动的在位测量；对置两测头时域法可以在一定程度上改善单测头法测量精度，但对随机径向误差无能为力；对置两测头频域法存在严重的谐波损失。

Pull head is one of essential part on drag chain,which usually needs electroplating treatment after diecasting.

拉头是拉链中的一个重要零件，通常要在压铸后再进行电镀处理，由于拉头比较小，而且形状、尺寸变化很大，表面积既不能计算，也不能用粉末表面积测量法。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。