查询词典 ballistic curve

Based on water-entry dynamic and water-entry ballistic theories, the oblique water-entry process of disk ogive is simplified and a wetted correction factor is introduced in order to accord with the true water pile phenomena, and an oblique water-entry impact model coupled with ballistic and dynamic models are established. According to the exact geometric shape of the wetted body surface, the dynamic model is established.

以冲击体入水动力学和入水弹道学理论为基础，针对平头尖拱体入水冲击这个复杂物理现象，引入体现液面隆起现象的沾湿因子，用等效液面代替自由水平液面，建立了斜入水高速冲击的运动学和动力学冲击模型，其中动力学模型是根据平头尖拱体沾湿面的具体几何形状而建立。

To create a mathematical model for the hydro-ballistic trajectory of high speed pellet entering water, the hydro-ballistic trajectory and cavity of sphere and pistol pellets entering water at three oblique angles and six velocities have been experimentally studied using a high-speed digital video recorder.

为了建立高速弹体入水弹道的模型，利用数字式高速录像机实验研究了球形与普通手枪两种弹丸在三个入水角、六种发射速度下斜入水的水中弹道轨迹与空泡。

The research contents and main conclusions are as follows:1. The present thesis adopted one-dimension interior ballistic model, regarding the ballistic spatial core as the unsteady quasi one-dimension airflow containing the friction and heat exchange between airflow and tube wall, considering the boundary layer unsteady, nonstationary condensable current; and employed the MacCormack finite difference method to write the program.

本文的研究内容及结论主要体现在以下几个方面： 1、采用了一维内弹道模型，把弹后空间的核心流部分考虑为包含气流与身管管壁发生摩擦和热交换的不稳定准一维流，边界层考虑为不稳定、非定常可压缩流，用MacCormack有限差分方法求解，编制程序进行计算，较为准确的得到了复合材料身管固壁瞬态温度场分析内边界条件所需的气流温度和对流换热系数结果。

The results show that the value of burning rate pressure exponent of propellant and its change law can bring about a great change of interior ballistic behavior, The new type high-energy propellant whose burning rate pressure exponent is decrescent as pressure increasing can obtain higher interior ballistic piezometric efficiency, and reduce the sensitivity of bore pressure and muzzle velocity on loaded conditions of propellant.

结果表明，发射药燃速压力指数的大小及其随压力的变化规律对内弹道性能有很大的影响，对于燃速压力指数随压力升高而减小的新型高能发射药，可获得较高的内弹道示压效率，降低膛压和弹丸初速对发射药装填条件的敏感性。

The similarity of interior ballistic performance variations of wearing and erosional gun is researched by the similar-analysis based on the zero-dimensional model and two-phase flow model of interior ballistic.

在内弹道零维模型及两相流模型相似分析的基础上，对烧蚀磨损火炮内弹道性能变化的相似性也进行了研究。

The eyeable ballistic simulation is completed after reading the ballistic data. The landform in the eyeable scene is formable by use of algorithms for generating fractal terrain.

读取数据并形成可视化弹道仿真，建立的可视化场景中运用了当前较新的分形算法产生地形。

Products made up of the fiber include bulletproof jacket, ballistic helmet, financial vehicle, ballistic shield, tank, naval armor protection board, parachute hawser, watercraft oceaneering cordage, mountain-climbing rope, fishing net and tread, boat, gig and arrow, pat, ski,man-made nearthrosis and ligament, safety protection cover, anti-impact vessel and so on.

基于高强聚乙烯纤维的优异性能，目前该纤维在国际上已成为21世纪蓬勃发展的高新技术材料而广泛用于安全防护、航空、航天、航海、电子、兵器、造船、建材、体育、医疗等诸多领域，如防弹衣、防弹运钞车、盾牌、坦克和舰船的装甲防护板、降落伞缆绳、船舶海洋工程缆绳、登山绳、渔网、渔线、赛艇、帆船、弓弦、网球拍、滑雪撬、人造关节和韧带、安全防护罩、抗冲击容器等。

For best shot effect, hitting target by many missile at one time is required generally when the ballistic missiles attacks target. So, it is important for ballistic missile's firepower control to confirm shot time based on flight time.

为了达到最佳射击效果，弹道导弹突击目标时经常需要多枚导弹同时击中目标，因此根据飞行时间确定发射时间则成为弹道导弹火力控制问题的重要内容。

They believed that the first round of threat would come from Taiwan who is now developing surface-to-surface ballistic missile, and it is also possible that North Korea's ballistic missile technologies may further proliferate.

他们认为，最重要的威胁将来自现今正致力发展地对地弹道导弹的台湾，此外朝鲜的弹道导弹技术也有进一步扩散的可能。

The method of ignition transient interior ballistic calculat ion of solid rocket motor was presented. Many factors influencing the performance of interior ballistic such as e rosive burning,friction,pressure velocity were taken into consideration.

探讨了固体火箭发动机点火瞬态一维非定常内弹道模型，综合考虑侵蚀燃烧、加质、摩擦、压力升高速率等因素对内弹道性能的影响，建立控制方程组并采用隐式差分方法结合特征线法求解，应用VC++。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。