查询词典 polar circle

In this dissertation, based on the extraction of meaningful polarization information, the polarimetric speckle reduction, polarimetric contrast enhancement, polarimetric classification and ship detection in polarimetric SAR images are systemically studied. During the study, some new concepts and methods are introduced, which are supported by the application to measured Pol-SAR data. The innovations of this dissertation are as follows: 1 A simplified schem is proposed to reduce the complexity of scattering-model-based speckle filtering. 2 Extend the expression of polarimetric correlation coefficient to help distinguishing targets. In addition, introduce the quantized parameters of polarimetric signature so as to show the differentiae in quantity in co-polar power, cross-polar power and shapes of polarization signatures among targets. 3 Define a new parameter of difference degree between targets, which can be used for express the difference between both coherent and distributed scatters.

论文在较系统的研究目标特征量提取方法和特征量所包含的物理意义的基础上，对极化SAR图像降斑、极化对比增强、极化SAR图像分类以及极化SAR图像中海上舰船目标检测等方面进行了研究，并提出了一些新的概念和方法，对实测数据的处理结果表明，这些新的概念和方法对于极化SAR信息处理是有效的，本文的主要创新成果包括以下方面： 1）针对基于预分类的MMSE极化降斑方法实现过程非常复杂的问题，提出了简化方案，并验证了方案的有效性； 2）扩展了极化相关系数的表示方法，这种扩展增强了极化相关系数对目标的区分效果；另外还提出了极化特征图量化参数，可以从量上表征不同目标间相同极化和交叉极化的回波功率差异和极化特征图形状差异； 3）定义了目标间的差异度参数，它不仅可以用于描述相干目标，还可以用于描述分布目标的差别程度。

Its maximum features is that material both polar and non-polar materials on cards and membership cards; as well as the direct flexography business card printing and membership card making, and matastatic lithography business card printing and membership card; neither oven or electric hair dryer facilities do not have to take into account the dirty version into powder.

其最大特征在于既能在极性材料，又能在非极性材料上制卡和会员卡制作；既能直接进行柔性凸版制卡和会员卡制作，又能进行转移性平版制卡和会员卡制作；既没有烘箱或电吹风设施，又无须考虑脏版进喷粉。

Proton events in general only occur in SAA region while electron events appear at both SAA and polar regions.Electron flux of 0 5～2 0?MeV in polar regions is dominant over that of 2～15?MeV,while at SAA,fluxes from the two channels are about the same.There is a close correlation between energetic particle radiation inside and outside the satellite.

与现有理论模型和国外大致相同轨道上的空间高能辐射环境直接观测资料对比还表明，卫星舱内的辐射与舱外的空间辐射环境是完全相关的，积累的有关资料不但是航天设计和环境应用研究所需的重要参量之一，也是空间物理基础研究特别是辐射带研究的重要数据。

If polar conditions are as cool as predictions say, ethane could accumulate as polar ice.

如果两极的状况如同预报的足够冷，乙烷将作为极地冰堆积起来。

To provide methods for the study of laser rapid prototyping system based on polar coordinates, especially it apply to featheredge spheroid parts; The make-up of SLS rapid prototyping system based on polar coor.

本文基于激光变长线快速成型系统和激光点扫描快速成型系统的特征，激光选区烧结成型工艺因其适用于中小型零件，且选用材料广泛，对其研究具有现实意义；为基于极坐标系的激光快速成型系统的研究提供了素材，特别是对于薄壁回转体零件具有较强的针对性；详实地讨论了基于极坐标的激光选区烧结系统的组成。

Especially, the viscous-plastic model and its modifications, which were applied widely at large and meso-scales in the polar and sub-polar ice field, were discussed in details.

尤其对在极区及副极区大、中尺度下广泛应用的黏塑性及其改进的本构模型进行了深入地分析。

Mainly in aspination Geld derivation of non-polar molecule mixed absorbheat noheat or at the time of the system, and for a strong system of polar molecules, fierce an hydrogen bond formation, mixing, when heat release, the results do not apply to deduce the packaging business card printing and membership card making ink.

主要是在吸取赫尔德推导的非极性分子混合时无热或吸热的体系，而对于强极性分子构成的体系，凶为台氢键形成，混合时会放热，则该推导结果就不适用包装制卡和会员卡制作油墨方面。

Install the polar axis scope illuminator onto the front of the polar axis and turn on the switch.

安装极轴望远镜照明在极轴的前端并打开开关。

Internal pressure and molar heat capacity at constant volume were calculated for 13 kinds of liquids at 25 ℃ and 101.325 kPa including polar liquids, non-polar liquids and associative liquids.

以包括极性液体、非极性液体和缔合液体的13种液体为例，计算了它们在25℃及101.325kPa时的内压和摩尔定容热容。

Nacreous clouds— also known as polar stratospheric clouds— contribute to the formation of the polar ozone holes.

珍珠云，也称为极地平流云，会造南极臭氧空洞的形成。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。