西霞院反调节水库建设对焦枝铁路黄河特大桥的影响分析及采取的防护措施

对黄河小浪底水利枢纽西霞院反调节水库建设给焦枝铁路黄河特大桥所造成的影响进行了详细分析,并采取了相应的防护措施,消除了黄河铁路特大桥的安全隐患.     

可怕的宗申

惯以低调务实著称的宗申集团,近来接二连三地推出炫目之举,这均以"赛科·龙"为名.而此时,业界的目光不约而同地对焦于宗申,暗自发问:难道宗申要发力了?     

07款福克斯

长安福特希望人们瞄准“焦点”再次“对焦”，这不，07款福克斯已经出现在了消费者的面前。在保持原有价格基础上优化的外观、增加的配置以及不变的驾驶乐趣是否能得到更多消费者的认可？我们拭目以待.[编者按]     

执掌2008

2008的主题很丰富,我们只为您选取了很小的一部分,不过它们都很有意思。了解它们,也许你就能更好地在这一年做时尚潮流的主!     

Focusing azimuth-invariant bistatic synthetic aperture radar data based on a polynomial model

In this paper, a focusing approach is presented to widen the use of efficient monostatic imaging algorithms for azimuth-invariant bistatic synthetic aperture radar (SAR) data. The bistatic range history is modeled by a polynomial of azimuth time. Using this model, an analytic form of the signal spectrum in the 2D frequency domain is derived, and a simple single-valued relation between the transmitter and receive ranges is established. In this way, a lot of monostatic image formation algorithms can be extended for the bistatic SAR data, and a bistatic chirp scaling algorithm is developed as an application of the new approach. This algorithm can be used to process the azimuth-invariant bistatic configuration where the transmitter and receiver platforms are moving on parallel tracks with the same velocity. In addition, some simulation results are given to demonstrate the validity of the proposed approach.     

α的新神话

α在希腊字母中位列第一，被赋了启明星的含意。1985年α7000开启了单反相机的自动对焦时代。时过境迁，23年后的α900也被索尼寄予了很多希望。     

2010异族

除了直板。就是另另另类了! 诺基亚7705 Twist 地球人都知道诺基亚偏爱直板机。翻盖手机基本不在诺基亚的设计范围之类。可除了平板手机，诺基亚的设计师，居然还很喜欢另类的造型。比如这款诺基亚7705 Twist采用了正方形加旋盖的怪异造型．让人觉得不可思议。诺基亚7705正方形的机身上搭载了一块24英寸26万色的屏幕．分辨率达到QVGA级别。