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This article first antenna, microstrip theory, the circular polarization technology, the theoretical discussion, in this based on the microstrip antenna of circular polarization method - corner square microstrip antenna, and has done a design simulation , and then do the design and further research to improve and eventually get a resonant frequency (S11 reflection coefficient corresponding to the minimum frequency) for the 1.5GHz and 1.43GHz, the frequency of circular polarization for the 1.46GHz, S11 is less than -10dB relative bandwidth, the VSWR is less than 2 is about 8.8% relative bandwidth, axial ratio less than 3dB relative bandwidth of about 2.2% of the right circular polarization microstrip antenna design case, which proved very good the circular polarization microstrip antenna theory, also fully confirmed by a square corner design is a practical program, and select the appropriate regulation of sticks is indeed able to improve the performance of the antenna.

本文先对天线、微带理论、圆极化技术等进行了理论论述，在此基础上，提出圆极化微带天线的实现方法——切角方形微带天线，并对此做了设计仿真，后又对这一设计方案做了改进及进一步研究，最终得到一个谐振频率（反射系数S11 的最小值所对应的频率）为1.5GHz和1.43GHz，圆极化频率为1.46GHz，S11 小于-10dB 的相对带宽、驻波比小于2 的相对带宽约为8.8%，轴比小于3dB 的相对带宽约为2.2%的右旋圆极化微带天线的设计案例，从而很好的印证了圆极化微带天线理论，也充分证实了切角方形是一种切实可行的设计方案，而选取合适的调节枝则确能提高天线的性能。

The effect of main screw parameters (length/ diameter ratio, helix angle, channel depth and compression ratio)of cold feed rubber extruder on extrusion temperature were investigated by orthogonal regression method on the basis of the statistical analysis of experimental results.

研究了螺杆造型（长径比，螺旋升角，螺槽深度，螺杆几何压缩比），挤出工艺和胶料种类对橡胶冷喂料挤出机挤出温度的影响，并对各实验因素及实验结果做了统计分析，得出了他们之间的定量数学模型。

The effect of the ratios of solid to liquid on the properties of the slurry, and the effect of baking temperatures on the flexural strength and the crack resisting properties of the shells are also investigated. Microwave dewaxing method is introduced with proper parameters.

在不同粉液比条件下，研究了室温及不同焙烧温度对型壳抗弯强度的影响，从而确定了最佳粉液比和焙烧工艺参数。

We develop and apply the Hirota bilinear-θfunction method,Jacobi elliptic function expansion method,linear superposition method and F-expansion method respectively to solve many 2+1 dimensional nonlinear wave models including 2+1 dimensional 2DsG equation,the coupled ZK equation,2+1 dimensional KdV equation,2+1 dimensional long wave short wave resonance interaction equation and 2+1 dimensional dispersive long wave equation,abundant Jacobi elliptic function doubly periodic solutions are derived.These solutions show various periodic wave shapes and special periodic characters.

发展和应用Hirota双线性-θ函数方法，雅克比椭圆函数展开法，线性叠加法，F-函数展开法等分别求解2+1维2DsG方程，耦合ZK方程，2+1维KdV方程，2+1维长波短波共振相互作用方程，2+1维色散长波方程，获得丰富的雅克比椭圆函数双周期波解，描述了一些周期波形态及周期特性。

2According to requirement of suppressing stray light in two-mirror system, vertex coordinate formulas of inner baffle are deduced based on geometrograph in the case of certain obscuration, viewing field and vignetting. In order to reduce the obscuration, conical baffle of secondary mirror is ameliorated into a shutter one. Outer baffle is designed when angle of stray light suppressing is foregone and the vanes are designed in C-language program. Finally, the same-height vanes in drawtube between primary and secondary mirrors are designed for further suppressing the stray light in two-mirror system.

给出双反射系统杂散光消除设计的具体要求，结合作图法，推导出考虑视场大小及初始中心遮光比确定时，主次镜内遮光罩顶点坐标公式；讨论考虑渐晕时主次镜内遮光罩的设计；为了减小初始中心遮光比，将次镜锥状遮光罩改进为百叶窗式结构；设计在杂散光源抑制角已知时的外遮光罩，并利用C语言实现程序化设计其挡光环的方法；设计主、次镜间镜筒内壁上等高挡光环，进一步抑制双反射系统的杂散光。

It aims to reveal the formation, development and disillusionment of American Dream through the analysis of the novel's writing background and plot, the author's experience, the connotation of American Dream in different historic backgrounds and the disillusionment of Gatsby's American Dream.

论文从作者和小说人物分析着手，通过对《了不起的盖茨比》的写作背景，作者自身的经历、故事的主要内容、"美国梦"在不同历史背景下的内涵、及盖茨比之梦的破灭等多方面的分析和解剖，深刻地揭示了"美国梦"的形成、发展和最终破灭。

It aims to reveal the formation, development anddisillusionment of American Dream through the analysis of thenovel's writing background and plot, the author's experience, theconnotation of American Dream in different historic backgrounds andthe disillusionment of Gatsby's American Dream.

论文从作者和小说人物分析着手，通过对《了不起的盖茨比》的写作背景，作者自身的经历、故事的主要内容、"美国梦"在不同历史背景下的内涵、及盖茨比之梦的破灭等多方面的分析和解剖，深刻地揭示了"美国梦"的形成、发展和最终破灭。

Out diameter of fire resistant cable with cross section more than 25mm2 is bigger than that of common cable by 25%.

4， 耐火电缆的参考外径，截面在25mm2及以下的比普通同型号的产品规格大15%，截面在25mm2以上的比普通同型号产品规格大25%。

Objective To observe the clinical effect on the artificial abortion when Ropivacaine is employed in caudal block.Methods Ropivacaine with different densities is used for obervations on the patient's life sign,pains,movement block,cervix flaccidity and the period of time of the patient's being away from the hospital.

目的 观察罗比卡因在人工流产术中骶管阻滞的临床效果方法用不同浓度的罗比卡因在门诊人流术中行骶管阻滞以观察其对流产者的生命体征、疼痛程度、运动阻滞、宫颈松弛度及离院时间的影响。

Analysed the ash components of 154 coal samples,discussed the influence of the main materials and acid/alkali ratio in the coal ash on ash fusibility in the paper,gained the relationship between acid/alkali ratio and ash fusibility.

通过对154个煤样的灰成分进行分析，探讨了煤灰主要成分及煤灰中酸碱比对灰熔融性的影响，并回归出了酸碱比与灰熔融性的关系式，预测结果与实测值具有较好的一致性。

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％。