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The design of four-mirror anastigmat was analyzed, then a system with effective focal length of 1 200 mm and field of view of 0.8°×0.8° was designed , total length and f-number are 300 mm and F/6,respectively.The system has advantages of long focal length, relative short physical size and excellent ability in restraining stray lights.

分析了离轴四反的设计步骤,设计了一个焦距为1 200 mm,视场为0.8°×0.8°,相对孔径为F/6的光学系统,系统总长只有300 mm,并达到很好的光学性能,具有长焦距、小尺寸、良好的杂散光抑制能力等特点。

This paper proposes a novel algorithm of Feature Match Based on Corner Affine Invariant. It selects corners as extracting feature of the image matching, and these corners are characterized by their orientation and angular width.

该方法是使用角作为图像匹配选取的特征,通过仿射不变处理来消除图像缩放、扭曲、旋转和平移产生的影响,实验表明,该算法具有良好的匹配性能,可以对差异较大的图像对进行特征匹配

This paper proves that XFPD has better performance than WL in the work of mining XML frequent patterns theoretically and experimentally, and gives a proof of the validity and feasibility of the XML data storage method presented in this paper by the implementation of an antetype model.

本文从理论和实验两方面证明了在挖掘XML频繁模式时,XFPD算法比WL算法具有更加良好的性能,并通过一个原型系统的实现,验证了本文提出的XML数据存储方法的有效性和可行性。

The invention has simple process and gentle conditions; the obtained modification ultrafiltration membrane has excellent anti-pollution performance and can be applied to the separation of biological products, etc.

本发明过程简单,条件温和,获得的改性超滤膜具有良好的抗污染性能,可用于生物制品等的分离。

Now, radiator enterprise use it to radiator inside coat, and the good anticorrosive ability well resolve the problem of alkali in beijing.

现在散热器的生产企业将其用于散热器内侧涂层,良好的防腐性能很好地解决了北京地区水碱大的问题。

It has good properties, such as, wettability, high flash point and viscosity, low pour point, and little action on metal and rubber. So it can decrease the friction force of moving surface to enhance antifriction.

具有良好的湿润性、高闪点和高粘度、低倾点等优良性能,对金属和橡胶的作用很小,减小运动表面间的摩擦力,提高抗磨损能力。

It makes best use of the feature of PVC, and has a good flame retardance and antistatic.

这种产品充分发挥了PVC材料自身的优良特性,有着良好的阻燃及抗静电性能,满足煤矿安全要求,是代替金属、玻璃钢以及其他材料抽放管道的理想产品。

The simulating results illustrated that the method is feasible and available, and this kind of controller is quite approving.

仿真结果表明,设计的几种模糊控制器均具有良好的性能,验证了方法的适应性。

Numerical examples show that the ATF elements exhibit excellent performance and some traditional difficult problems appeared in the development of the FEM are solved with them.

数值算例表明,基于解析试函数的广义协调元具有良好的性能,计算精度高,并较好地解决了有限元发展中的几个疑难问题。

DMEbecomes a potential alternative fuel,for its excellent autoignition performance and capacity to meet ULEV emissions standards for diesel engines without any exhaust gas after-treatment.

由于DME有良好的压燃着火性能以及不需特别的措施就能达到超低排放标准,因而成为柴油发动机一种很有潜力的替代燃料。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。