Finally, we compare six degrees of freedom simulation results of ballistic re-entry missiles motion with the computing results of approximate formula. The comparison shows the feasibility of the approximate analysis.

For a self-propelled artillery the computational program is achieved, by which the simulation of launch process is realized. The interior ballistic, motion of projectile in gun tube, dynamic response of the artillery and initial disturbance of projectile are exactly simulated.

编制了计算程序，实现了对某自行火炮发射过程的数值模拟，在准确计算内弹道过程的同时，获得了火炮的动力响应、弹丸膛内运动和起始扰动。

Compared with general time delayed filter, the controller depresses the high frequency components of the command input, and reduces the excitation of the vibratory modes and ballistic motion of the system.

与常用的时滞滤波器相比，能抑制控制信号的高频成分，降低未建模动态激励和运动冲击。

Because of the ballistic motion, hot electron diffusion and energy transport between the Cu film and substrate, the cooling process of electron system in the Cu film is speeded up.

这是由于在实验中电子弹道运动和热电子扩散作用的存在，以及薄膜和衬底间的能量输运，加快了薄膜内电子系统的冷却过程。

Ballistic factor of a measuring instrument

测量仪表的阻尼因数

By the penetration and ballistic test for different state nitrogen alloyed austenitic steels and low alloyed martensite steel, their penetration mechanism was analysed.

对不同状态含氮奥氏体钢板和马氏体钢板进行了抗枪弹与抗杆式模拟弹试验，分析了它们的穿甲机理。

The preparation process, dynamic response under shock load, material design, ballistic test and modeling of the graded ceramic-metal armor composite were reviewed.

详细综述了梯度陶瓷金属装甲复合材料的制备工艺，冲击加载下的动态响应，材料设计，抗弹性能与数值模拟方面的研究进展；

Opto-electronic theodolite multiple ballistic test based on fuzzy c-means clustering

基于模糊聚类的光电经纬仪多子弹弹道测量

Basic system study on SYNCHRO-BALLISTIC photography exterior ballistic test

狭缝联动摄影外弹道测试基础系统研究

Application of Laser High-speed Photography Based on Area-array CCD to Ballistic Test

基于面阵CCD的激光高速摄影技术在弹道测试中的应用

Missile Bullets' Multiple Ballistic Test by Means of Optical Image

利用光学成像进行子母弹多子弹抛射弹道测量

Study on Correction Computation for Ballistic Test Results of Free Recoil

对自由后坐试验结果修正计算的研究

The computation program presented should provide a general means for the interior ballistic curve of accurate prediction of starting transient process, as well as for the investigation of the influences on it of the various factors involved.

本文编制的计算程序可作为精确计算起动瞬变过程内弹道曲线和研究其影响因素及其规律的手段。

Different drag correction coefficients at different time points are introduced, and then both speed curve and ballistic curve fitting are finished.

采用在不同时间点增加阻力系数修正系数的方法拟合速度-时间曲线和位置-时间曲线。

The ballistic curve prediction provides guidance for choosing centroid of test model, and the computational results coincide with tests very well.

弹道曲线的预测为航行器试验模型质心位置选取提供了依据，计算结果与试验符合良好。

Analysis of Initial Phase Ballistic Curve for Anti-Tank Missile

反坦克导弹初始段弹道分析

You are balling things up for everybody, your sister included.

你把大家的事都搞砸了，也包括你姐姐。

Based on analyzing the cause of balling up, through improving the performance of drilling fluid, and changing drilling parameters, the paper put forward the technical measures of prevention PDC bit balling. They help to solve the problem of PDC bit balling.

在分析泥包原因的基础上，从改善钻井液性能、改变钻井参数、精心操作等方面，提出了预防PDC钻头泥包的技术措施，有助于解决PDC钻头泥包的问题。

The secondary particle sphere of xonotlite yielded by konilite is of hollow structure, however, for the carbon white fibrous crystal just stacked densely and balling up is poor.

由粉石英制备的硬硅钙石二次粒子球具有中空结构，而白炭黑对应样品则以纤维聚集成的块体为主，成球差。

Aimed at resolve the several problems which affect drilling efficiency, such as balling up and calcareous cementation, the design of blade bits was modified.

针对钻头包泥堵钻和钙质胶结层难以进尺等影响钻进效率的几个问题，对刮刀钻头结构进行了改进设计，并取得了令人满意的效果。

Analysis on balling up caused by helicoid hydraulic motor bypass valve failure in combined drilling technology EXPERIMENTAL STUDY OF ABRASIVE-CORROSIVE WEAR OF MUD PUMP LINER

复合钻井过程中螺杆钻具旁通阀刺漏造成钻头泥包分析钻井泵缸套材料磨料&腐蚀磨损实验研究