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First of all, the physical properties of plastic projectile body influencing the motion of pro- jectile are analysed in this paper which depends on the test results.

本文以实验结果为依据，首先分析了塑料弹体影响弹丸膛内运动的物理性能，然后结合旋转弹丸的膛内运动特征，经过模拟试验，采用数学拟合法，初步建立旋转稳定弹塑料弹体工程设计计算的数学模型(包括结构尺寸设计计算、强度计算和内弹道计算)。

Barrel is the key part of artillery. In shot process, propellent gas of high pressure and high temperature flows in the tube at a high rate of speed, which brings an upheaval to the temperature field of the composite barrel. As to the composite barrel with metal inner, its poor thermal conductivity is more likely to cause uneven temperature distribution and bigger temperature gradient, to produce improper deformation and to make the work temperature of metal inner rise, all of which will affect the life span of barrel.

身管是火炮的关键部件，在火炮发射过程中，高温、高压的火药燃气在身管内成脉冲式高速流动，使身管受到急剧的加热，引起身管壁内的温度急剧变化，而对于带金属内衬复合材料身管，由于复合材料导热性能较差，更容易引起非均匀温度分布以及较大的温度梯度，产生不合适的变形，也会使身管的金属内衬的工作温度升高，从而使得身管的寿命降低，同时身管的发热会引起其刚度的变化，增大射弹散布。

The detailed steady state process of OCC APF with both resistive load and nonlinear load is analyzed,based on which the physical meaning and steady condition of proportional part and integral part in PI controller are given.

在此基础上给出了 PI调节器中P和I环节的物理意义及其应满足的条件，发现可将其作用分开：I环节主导Um长期内较大的变动，用来反映负载大小的改变；P环节每个工频周期内对Um小范围调整，用来平衡每个工频周期内负载存在的谐波。

The contents of putrescine were apparently higher than the control, then decreased with the increase of lead mass concentration and the time of treatment.

黄瓜幼苗叶片精胺和亚精胺在处理第5d时高于对照值，茎中精胺和亚精胺含量在处理第7d高于对照值，而其它时间内的都低于对照值，而且其含量均随铅质量浓度的增加而呈下降趋势；过氧化物酶活性变化与内源多胺含量（腐胺、精胺和亚精胺之和）的变化相似，表明铅胁迫能改变黄瓜幼苗内源多胺的含量和调节过氧化物酶活性，从而影响着黄瓜植株的生长。

Plate and λ/2 plate were placed inside the Nd∶YVO4KTP green laser cavity with angle 90°between their fast axis.The composite plate composed of HWP,QWP and KTP has the function of QWP.The composite plate with Nd∶YVO4 can effectively suppress the coupling of polarized modes,and multi-longitudinal-mode lownoise green laser was obtained.Since the composite plate counteracted the phase shift induced by temperature sensitivity of quartz plate,the green laser operated with lownoise reliability in different output power and different operation temperature.The threelongitudinalmode, the noise of less than 0.5% and output power stability of less then 1% for 12 hour are obtained in the green laser.

介绍了一种LD泵浦腔内倍频全固体Nd∶YVO4KTP多纵模、低噪音、高功率稳定绿激光器在Nd∶YVO4KTP绿激光器组成的谐振腔内放置厚度约相等的石英晶体λ2波片和λ4波片，使两波片快轴夹角互呈90°，HWP、QWP与KTP构成复合波片，其作用相当于QWP，此复合波法与各相异性Nd∶YVO4共同作用有效抑制了腔内偏振模耦合，获得多纵模低噪音绿光输出此复合波片相互作用由于抵消了石英晶体波片温度敏感引起的相位延迟量漂移，所以此激光器在不同功率、不同工作温度下，均能稳定可靠地运转于低噪音状态实验结果为，绿光输出纵模数为3个，噪音小于0.5%，12 h功率稳定性优小于1

In this thesis, the studies as follows:(1) The axis and radial flow field distribution of CFB were analyzed by the particle flow visualization software, and the criterion of turbulence to circulation fluidization situation was reported.

本文以管式布风条件下流化床内流动特征为研究对象，主要研究内容如下：(1)通过开发的颗粒流场可视化软件，对循环流化床内轴径向的流场进行了分析。在循环流化床试验台上分段测量了全场颗粒矢量速度，得到了循环床上升段内的整个流场分布。

Methods Three hundred cm-long ileus tube was installed into jejunum by nasal cavity under radiophotography observation in 25 cases with recurrent postoperative adhesive ileus,ileus tube was impulsed by enterokinesia to ileum end to relieve adhesive ileus and conduct internal intestinal arrangement.

25例术后反复黏连性小肠梗阻患者，X线监视下经内置金属导丝的引导作用将300 cm长的肠梗阻导管经鼻置入空肠屈氏韧带20 cm以远，即刻小肠内抽吸减压，导管前气囊充水形成水囊，模拟食团在肠蠕动的推动下在小肠内移行，带动导管边吸引减压边向小肠远端前行，到达梗阻的直接上部抽吸减压或通过黏连部至回肠末端全小肠减压，解除肠梗阻。

The complex objects and their computational region are transformed by Thompson transformation to a regular region.By applying Finite Difference.Time Domain method,the field distribution in regular region is solved conveniently.

该方法先利用微分-Thompson变换将形体变换为计算域内的规则形体，再用时域有限差分法在计算域内求出场分布，由变换的一一对应关系直接得出物理域内的场值。

We discuss some properties of GPP- ring and the relations between GPP- ring and - regular ring.

在第三章中，我们主要讨论了n-平坦模和n-FP内射模，定义了n-平坦维数和n-FP内射维数，并考虑了交换n-凝聚环中的n-平坦模和n-FP内射模。

Select steam initial temperature from 535℃to 660℃, and initial pressure form16 MPa to 34 MPa, We choose 494 sets of different steam properties in the selected sphere. Making the 494 sets of parameters basing points, We program and analyze how ideal cycle efficiency and relative cycle efficiency and absolute cycle efficiency vary with steam initial properties .

选定蒸汽初温从535℃到660℃，蒸汽初压从16MPa到34MPa范围内的494组不同的蒸汽初参数组，以这些初参数组为基点，编制程序，研究分析了机组理想循环热效率，汽轮机相对内效率，绝对内效率随初参数变化的规律。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。