对削

An improved semi-discretization method based on Magnus-Guassian truncation was presented for analyzing the stability of periodic orbit of the DDEs.

对该动力学模型进行稳定性分析，可以确定稳定的铣削参数域及稳定性图。

By adopting the microscope and CCD photographic system the adjustment of pipette and feeding process of grinding are observed directly.

采用显微镜和CCD摄像系统直接观察对针和磨削进给过程。

In view of the complex nature of distortion problem, a method combining finite element simulation with experiment and theoretical analysis is adopted in this dissertation. Then, the distortion prediction method and distortion law of monolithic component are researched deeply and widely.

本文在阐述航空整体结构件国内外加工研究现状、产生变形原因的基础上，采用实验研究、理论建模和有限元模拟分析相结合的方法，对钛合金航空整体结构件铣削加工变形的预测方法和加工变形规律进行了深入、系统的研究。

Based on the description of the existing methods for wear intensive automatic measurement by milling tools abroad, the advantages and disadvantages of the metheds and their application areas are comparatively discussed and their application prospection in our military production is analyzed.

综述了国外现有的铣削刀具磨损量自动检测方法，对比分析了各方法的优缺点及应用范围，并对其在我国军品生产中的应用前景进行了初步分析。

PF500 is applicable on surface grinder or universal grinder to clamp puncher within φ70mm for grinding various shapes.

PF500型冲子成型器是为直径φ70mm以下的大型冲头设计的，可用于平面磨床及万能工具磨床，对各种形状的冲头进行磨削加工。

Leaf blades broadly linear to lanceolate or elliptic, base narrow, apex acuminate to setaceous; ligule membranous, truncate, back pubescent.

叶片宽线形到披针形或椭圆形，基部狭窄，对刚毛状的先端渐尖；叶舌膜，削去，向后青春期。

With its excellent cutting ability and the rigidity, it is suitable to be mounted on a slicer for the cutting and grooving of glass and crystal materials.

该产品发挥树脂结合剂切割刀片的研削效果好和钢芯的刚性高等特点，适合安装在划片机上，对玻璃和晶体材料等进行分割及开槽加工。

In addition, the calculating formula of the optimal bevel slotting angle is given.

通过对斜插后齿轮的齿面方程的推导和误差分析，详细论证了该加工方法的可行性，并给出了最佳斜向插削角度的计算公式。

According to may appear problem on machining process, must do some with follower rest, tailstock for further improvement.

因此，要提高超细长轴车削加工的精度，必须对车床的夹具和刀具做进一步的改进。

The main content of this dissertation can be described as follows: Firstly, the precision measuring theory of spindle rotatory error by the single, double, trinary sensor respectively is researched more thoroughly along with the elimination principle of measurement deviation. According to the characteristic of boring, a new measuring theory and its evaluation criteria of two radiating sensors is proposed based on the theory of relative axis trace movement.

全文围绕实现主轴回转误差的测量与补偿理论机器在镗削加工中的应用研究展开，具体内容概括如下：首先，在分析主轴回转误差的精密测试理论之后、对单传感器、双传感器、三传感器方法的测试理论，测量偏差的消偏原理等理论进行深入地研究。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。