发射

The virtual environment for gun firing was built, and the visual simulation of gun firing was realized.

建立了火炮发射的虚拟场景，实现了火炮发射的可视化。

The result shows that the movement of the propellant grains is complex and relative to the ignition system very much. Guns with center tube ignition and flame-spreading system can alleviate the accumulation of the propellant effectively, and will have better performance.

结果分析表明：火炮点火后膛内火药颗粒的运动情况十分复杂，其运动规律与点传火的方式密切相关，点火孔均匀分布的中心传火管点火方式可以有效的改善发射过程中火药颗粒在弹丸底部堆积的现象，获得更佳的发射效果。

A circle is placed at the launch point to improve the interaction between the electron beam and the fields supported by the slow wave structure, thus to control the beam current density at the launch point, and to minimize the loss of the electron beam energy. The inaner radii of the extractor vanes are slightly larger than those of other SWS vanes, which increases the axial group velocity and enhances the microwave output power and efficiency. Implementation of two RF choke vanes stops the leakage of microwave pulse power toward the diode, and makes the device more compact than the conventional MILO.

该振荡器在阴极电子发射起点加圆环，控制此处电子束的发射密度，来减少电子能量的损耗，改善束－波互作用；逐渐加大慢波结构的后两个叶片的内半径，增大微波群速度，便于谐振腔中的能量输出，提高微波输出效率；采用两个扼流片有效地阻止了微波功率向二极管区泄漏，相应减小了器件的尺寸。

By simulating the absorption spectrum of molecule iodine absorption filter ranges from 470nm~550nm, this paper selects the absorption spectrum of molecule iodine absorption filter that satisfies the requirement of frequency discriminator in detecting system and ascertains the center emission frequency of laser emitter.

以基于边缘探测技术的激光雷达监测大气信道和海洋水下信道环境参数为例，通过仿真出碘分子吸收滤波器在470nm～550nm区间范围内的吸收光谱谱线，选择出合适的吸收谱线并确定发射激光信号的中心频率，并在此基础上，给出了满足探测要求的激光发射信号单稳频指标，为实际探测系统的设计奠定基础。

After compared, the balanced GOLD code has the keen-edged self-correlation characteristic and lesser mutual correlation function; in addition, the sequence numbers of lesser mutual correlation function is more than any other code.

通过比较，发现平衡GOLD码具有尖锐的自相关特性和较小的互相关函数，并且具有较小互相关函数的序列数目多。因而采用平衡GOLD码对发射端的超声波信号进行调制发射。

Another rocket was fired at a western Negev kibbutz and Gaza terrorists fired four mortars shells at Israel Saturday evening.

另一个火箭发射在西部内格夫集体农庄和加沙地带的恐怖分子发射了四枚迫击炮弹，以色列周六晚。

And when prepares LAP discovered with the Mg this race element replaces in LAP the La element also to be possible to obtain the green luminescent phosphors, and has determined its emission rate and the launch wave length with the fluorescence luxmeter.

并在制备LaPO4时发现用碱土族元素Mg，Ca，Sr，Ba代替La PO4中的La元素也可获得绿色荧光粉，并用荧光光度计测出了其发射强度和发射波长，从而开发了新型APO4：Ce，Tb(A=Mg，Ca，Sr，Ba)系荧光粉。

The electronic interaction between the triarylamine units and porphines macrocycle in 4a-c and 10a-c were investigated by UV-vis absorption spectroscopy and fluorescence emission spectroscopy, and the results showed that there was a good energy transfer between triarylamine units and porphines.

经紫外吸收光谱和荧光发射光谱研究表明在化合物4a-c和10a-c分子中三芳胺基团与卟吩母体之间有很好的能量传递，使得三芳胺基团吸收的能量通过卟啉发色团发射出去。

The Cox Report also says that the US carrier rocket fairing technique China has acquired through commercial satellite launches may assist the design and improved reliability of future PRC MIRVed missiles, if the PRC decides to develop them, and of future submarine-launched ballistic missiles''.

考克斯报告》还称，中国通过商业卫星发射得到了美国运载火箭整流罩技术，这&也许有助于中国设计和改进未来的多弹头再入大气层导弹和潜艇发射弹道导弹及其可靠性&。

As a nondestructive technique to measure the inner fine structure of the cathode, the ICT has the uniqueadvantage.We discussed the emission mechanism of thermionic cathode, and tried to explain the excellent performance of mixed metal cathode by Richardson formula and Mullers computational model.

4就当前钡钨阴极发射机理的两个主要理论模型作了自己的探讨，并初探了钡钨阴极中钡的供应机制及发射寿命预测的问题，而且用理查逊公式的推导和Muller计算机模拟法解释了混合基钡钨阴极的优良性能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。