多束的

After enough of the bait has been eaten we send a beam of light through the desert.

当足够多的诱饵被吃了以后，我们送出一束穿越沙漠的光。

Over the course of this tutorial you'll be exposed to many more ADO.

本指南节束后，你将会在专门的课程中学习到更多的ADO。

Safety Engineering Research Institute, Nanjing University of Technology, Nanjing 210009, China Abstract: Cellulose acetate has been widely used as the filter material of cigarettes.

二醋酸纤维丝束是目前被广泛使用的香烟滤材，由于生产中有害介质多、流程长，生产具有较高的危险性。

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。

Surfactant systems, especially micelle and microemulsion systems, have been extensively applied to chemical engin...

表面活性剂体系具有广泛的应用价值，特别是胶束和微乳液体系的应用已渗透到化学工程、油田开发和医药等诸多领域。

In the analysis, abbreviating the distance between the end of BRBs and the surface of nearby beam or column is also helpful to avoid the gusset buckling. Besides, BRBs behave well in the frame. They take about 80% of story shear, and dissipate the most of imported earthquake energy.

除此，挫屈束制支撑於构架中行为表现良好，除在构架中承受约八成之楼层剪力之外，能够消散大部分的地震能量，且斜撑寿命十分长久，可承受多次地震而不破坏。

It was depicted as the largest, costliest extravaganza in Olympic history, bookended by barrages of some 30,000 fireworks.

这场堪称奥运会历史上规模最大，花费最多的开幕式，将以三万束焰火拉开帷幕。

Objective To investigate the clinical usefulness of DTI multiple parameter and diffusion tenser tracting in astrocytomas.

目的 探讨磁共振扩散张量成像多参数综合分析及扩散张量纤维束成像在星形细胞瘤临床分级中的应用价值。

For some people with bigger 'behinds', they won't have much use for the drawcords.

对于有些有着虎背熊腰的人，束带对他们而言并没有多大作用。

2 And 1×4 MMI splitters were fabricated by means of UV-light imprinting technology, and good mode profiles were measured.

利用紫外光直写技术，制作出1×2，1×4多模干涉型分束器，并且观测到了分光效果较好的近场输出图像。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。