查询词典 select

Some of my creations are also sold in select boutiques....

我的创作一些精品店也出售选择。。。。

However, it's important that you select a good credit card debt settlement agency.

但是，它是重要的是你要选择一个好的信用卡债务清算机构。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

In the list at the bottom of the Navigator, select the document containing the item that you want to cross-reference.

在导航底部的列表中，选择包含要进行交叉引用的项目的文档。

Different parent have different hereditary effects of yield and quality traits. Rational select the parent will help to crossbreed of Island Cotton and to use hybrid heterosi.

不同亲本对产量、品质性状的遗传效应不同，合理选配亲本有助于海岛棉杂交育种和杂种优势的利用。

The results from laboratory and fields showed that "beiao" baits has coefficient of select food and after put in fields half year,and has value in controlling rats compareing with anti cruor bait and naturalness.

结论初步研究证明，贝奥雄性不育剂具有良好的适口性，有实际应用价值，在肾综合征出血热地区应用半年后，与自然对照和常规的抗凝血杀鼠剂比较

The existing on-line CSIS (species and experts information) will provide help to select the

网上的CSIS将帮助用户在剩余的短小名单中选择正确的物种

To select several channels, hold down the Ctrl key while you click the channels you want.

要选择多个频道，请在按住 Ctrl 键的同时单击您想要的频道。

Hold down the Ctrl key and select the "line 1" and "line 2" layers.

按住Ctrl键并选择" 1号线"和"第2行"层。

Press the CTRL key to select the photo, and click you want to rename the photos.

按下CTRL键来选中照片，并点击你想要重命名的照片。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。