杂波

On the other hand, IPIX real-life data are used to verify the effectiveness of the theories and methods.The limitation that small and weak targets within sea clutter are difficult to be detected by statistical model and likelihood ratio test is analyzed in this paper.

在研究中注重将理论研究和实证研究相结合，一方面采用最新的非线性理论对海杂波进行分析和研究，另一方面结合IPIX雷达实测数据来检验海杂波处理和弱小目标检测方法的有效性。

According to the influence of the clutter to GMTD in SAR system, this paper uses a method combining elimination of the clutter with refocus of the moving targets.

基于杂波对机载SAR慢速动目标检测的影响，采用杂波对消与动目标聚焦相结合的方法完成动目标检测。

In nonhomogeneous background,slight increase of mean level of clutter power could cause sharply increase of false alarm probability.

在非平稳杂波背景中，背景杂波平均功率的轻微变化会使虚警概率急剧上升。

By sky or ground wave propagation, the detection range of the HF radars breaks through the limit of the curvature of the earth, which makes it possible for long-range air early-warning and target monitoring. At the same time the unique abilities in detecting low-detectable targets of the HF radars makes them powerful equipments for detection of hermit aircrafts, small airplanes in heavy land and sea clutters, and even intercontinental missiles.

借助于天波或地波传播方式，高频雷达的探测范围突破了地球曲率的限制，因此使远距离空中预警和目标监测成为可能，同时高频雷达所具有的独特和良好的对低可探测性目标的探测能力，使之成为探测隐形飞行器和处于强地杂波和海杂波背景中的小型军用飞机、巡航导弹等贴地、贴海飞行的小目标及洲际导弹进行有效探测的有力装备。

The application of nonextensive distribution model for sea clutter modeling and small targets detecting is improved. Surrogate data method is used to analyze nonlinear character of sea clutter.

本文分析了海杂波在统计模型建模后运用最大似然比检测准则下，很难检测出弱小目标的缺陷，改进了非广延分布模型在海杂波建模和弱小目标检测领域的应用。

Secondly, on the basis of the analysis of the spatial-temporal feature of background and infrared targets in infrared sequence, a method for clutter suppression and noise removement based on the association of spatial self-adaptating Two Dimensional Least Mean Square background predict and temperal Higher-Order Cumulant is presented, and its improved version suitable for strong edge rejection and gaussian noise suppression is proposed.

然后针对红外图像序列中弱小目标和背景的空间和时间特性，提出了一种空域改进的自适应二维LMS背景预测和时域高阶累积量相结合的杂波抑制和滤波降噪的预处理方法，理论和实验结果表明，该方法对于抑制强起伏的红外背景杂波和去除高斯噪声的影响非常有效。

By doing so, the effect of training data pollution in STAP is mitigated.

另一种方法是根据已知的雷达系统参数计算出近程杂波的距离多普勒二维分布，在STAP处理时将包含近程杂波的距离单元剔除使之不参与协方差矩阵的统计，这样就减少了样本污染对STAP的影响。

Based on typical models, clutters are generated on computer so as to study the feasibility of simulation algorithms.

本研究的目的就在于总结现有的杂波模型和模拟方法，并根据典型模型，通过计算机模拟产生杂波信号，研究模拟方法的有效性。

This thesis introduce the properties of sea clutters, sea clutters elimination, development direction.

简要介绍了海杂波特性，海杂波的抑制技术及其发展方向。

This thesis introduce the properties of sea clutters, sea clutters elimination, development direction and anti-interference.

简要介绍了海杂波特性，海杂波的抑制技术和发展方向，以及脉冲多普勒雷达抗干扰技术。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。