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Based on the measured depth of smaller lunar crater. Baldwin's equation gives the depth of the zone of brecciation for such a crater as about 75km.

基于经过测量的小一些的月球撞击坑的深度,鲍文的方程给出了合成角砾岩地区同样的撞击坑的深度是75公里。

At first it was thought to be a meteor impact crater due to its circularity but this has since been disproven due to the lack of shock-altered rock in its vicinity.

首先他被认为是一个陨石撞击而产生的陨石坑,因为它呈现的是一个圆的形状;但是这个说法已经被推翻,因为它的坑内附近缺乏陨石撞击会产生的变质岩石(shock-altered rock)。

The distribution of pressure in double volute is symmetry 180°, there is refluence on the tongue, there are also refluence and strike in the channel, the flux is different ,the degree of them are different.After analyzing the phenomena in a detailed way, we find there is unreasonable area in the design of volute.

双蜗壳内的压力分布呈180°对称分布,靠近蜗壳内侧的压力大于蜗壳外侧的压力,在隔舌处存在回流,在过渡流道内存在回流与撞击,流量不同,撞击和回流的程度不同。

In this paper, the electrostatic potentials at the midpoint of C-NO2 bond and the net electric charge on every element in nitrobenzene derivatives, nitrotoluene derivatives, nitrophenol derivatives and nitroaniline derivatives were calculated using ab initio.

根据分子结构、静电势最大值、实验撞击感度及分子中各元素所带的净电荷,对影响炸药感度的因素及DATB和TATB的特殊稳定性进行了分析。通过分析,我们发现,影响上述炸药撞击感度的因素主要有硝基、甲基、羟基和胺基。

And regular e-mail carving process differences between an ordinary e-carving process control by making-workstation with diamond engraving-pin oscillometry high speed electronic carved head impact surface rotating version, resulting in the net impact of point to form a network.

与别致电子雕镂工艺的差别别致的电子雕镂工艺是由拆版处事站把持带有金刚石雕镂针的电子雕镂脚低速振荡撞击回旋扭转的版滚筒暗不天,变不败网穴(撞击一次变不败一个网穴)。

Compared with the results of milling Ti〓C〓 in a SPEX mill, the difference in mechanism is suggested to be caused by the effect of plastic deformation on the changes of fine grains and internal strain during milling, and the different heat of formation of TiC and TiB〓, which is the driving force for the reactions.

与在SPEX型高能球磨机中球磨Ti〓C〓的结果相比较,由于球磨输入能量和撞击频率,即撞击能的不同,使相同的成份呈现完全不同的反应机制。

Secondly, a theoretical dual rigid-plastic modal under lateral impact of blunt indenters is firstly developed in order to predict damage pipeline which is fully clamped across a span based on rigid-plastic beam on a perfectly plastic foundation, which is made up of a rigid-plastic sub-beam and a rigid-plastic basic-beam, the rigid-plastic sub-beam is used to predict denting deformation, the rigid-plastic basic-beam is used to predict global deformation, the sub-beam and the basic-beam interact by a perfectly plastic foundation.

为了更好地估计钝头弹体冲击对管道造成损伤,在刚塑性地基梁模型的基础上,首先提出了一种新的理论计算模型一双重刚塑性梁模型,由一子梁和一基梁构成,子梁用来估计弹体撞击造成的局部损伤,基梁用来估计弹体撞击造成的整体弯曲,子梁和基梁通过基础反力相互作用。

The velocity distribution function is modified for impact of molecules in a microbeam given by Kadar.

考虑到谐振微梁振动时,撞击在微梁两侧的分子数目和分子速率分布的差异,对 Kadar 等人提出的撞击微梁的分子速率分布函数做了修正。

This paper, based on the full scale bird impact tests, and detailed analysis the results of high speed photography, dynamic strain gauge, puts forward that triangle pulse simply model could be simplified by bird impact loading of inclined impact process .

对飞机风挡进行全尺寸鸟撞试验,通过对鸟弹撞击风挡玻璃过程高速摄影、动态应变测量等试验结果的分析,提出了斜撞击过程的鸟撞载荷可以简化为三角形脉冲的简化分析模型,利用该简化载荷模型对风挡玻璃鸟撞进行的有限元分析,结果和试验结果很好地相符

To compare the properties of superfine RDX with common industrial RDX, and those of granulated superfine RDX with granulated industrial RDX, the impact sensitivity,friction sensitivity, brisance were tested in the same condition.

采用纯超细RDX与工业RDX ,以及以超细RDX和工业RDX为主体、采用相同配方和制备工艺制取的高分子粘结炸药对比的方式,在相同的实验条件下,对撞击感度、摩擦感度、爆轰感度进行了测试和研究,得出超细RDX无论是纯品还是高分子粘结炸药,其撞击感度、摩擦感度均低于工业RDX ,而爆轰感度优于工业RDX的结论。

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