集束的

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During the third period (from 1937 to 1942), Li Jianwu came out with his second wonderful work "Ju Hua Second Volume". Compared with the "Ju Hua Volume","Ju Hua Second Volume" changed its length, style and character manner. The remarkable change is reflected in the choice of the critical object, and the continuation and development of literary view. The critical object was changed form "Jing Group" youth to "left wing" literature youth. The highlight of criticism not only preserved the need to the "harmoniousness" and "continency", but also further noticed the elements of "era" and "force". From such a choice full of antinomy and quandary, it is not hard to conclude a thinking logic in accord with "era" color.

第三阶段从1937年到1942年，李健吾紧接着捧出第二束奇葩--《咀华二集》，与《咀华集》相比，《咀华二集》在篇幅、文体、文字风格等方面都发生了变化，而最大的变化当属评论对象的选择以及相应的文学观的延续与发展，评论对象由前一时期的"京派"青年作家转向左翼文学青年，批评视点除继续保留对"和谐"与"节制"的要求外，进一步注意到"时代"和"力"的因素，从这一充满矛盾与困惑的选择中不难窥见出一种合乎"时代"色彩的思维逻辑。

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。

Unmyelinated fiber bundles consisted of the fibers with dimension less than one micron, and their terminal buttons often compacted together.

无髓纤维小束由直径1μm以下的纤维组成，其终末有时麋集在一起。

As a career in designing and producing the manufacturing equipment of electronic wire and cable, we supply many kinds of twist machine. Our main products are buncher, twist quadding machine, Rigid stranding machine, tube type stranding machine, and com-municating wire and cable stranding machine.

各类绞线，集合机皆为我们的主要产品：除了生产一般大型束绞机，行星式集机，RIGID式集合机，炮筒式绞线机外，我们更生产精密的专业电子，通讯网路线之基础绞合机，包括：供生产高效率，高品质线缆之高速倍绞型对绞机，给线捻返倍绞型星绞机及对绞机。

Inflorescence bracteate, partially iterauctant, composed of 1–7-spikeleted racemes gathered into fascicles or globose mass subtended by a tiny, membranous, 2-keeled prophyll, 0 or 1 gemmiferous bract, 2–6, gradually enlarged scaly bracts, and 2–7 spathiform bracts.

具苞片的花序，部分iterauctant，由1-7 spikeleted组成，总状花序进束簇聚集群众以极小，膜质，龙骨状的2被包着的或球状，小穗具2-7小花，顶生不育。

Twistless roving is the fundamental mode of FGR.The twistless strand(Multi-fiber twistless roving) is pieced together from multiple parallel strand or from rhe multi-cluster strand which is put together directly by roving.

定义：无捻粗纱是玻璃钢基材的最基本形式，由多股平行的原丝拼合而成的粗纱或由一次拉制的多根单丝直接集束而成的粗纱。

From bright generation Liu Tian is mixed " collect asking water ", 10 thousand respectful " hoof of a bamboo fish trap of prevent floods by water control ", Pan Jixun " general view of flood-prevention work done on rivers " can see processing Huang Yunsai thinks in 3 books that treat a river from prevent floods by water control prevent or control flood, treat a river to understand use --, it is our country manages the transition period that river idea studies on Huang Shi.

从明代刘天和《问水集》、万恭《治水筌蹄》、潘季驯《河防一览》三部治河书中可以看出治理黄运思想从治水防洪、治河通运———河运合一、以河治河———筑堤束水、以水攻沙的变化，是我国治黄史上治河思想的转折时期。

A unique example of sperm cooperation in monotremes is used as evidence that the epididymis produces sperm competition proteins to form groups of 100 sperm into bundles that have a forward motility nearly thrice that of individual spermatozoa.

本文为此提供了证据，证据之一是单孔类动物精子的协作模式。附睾产生精子竞争蛋白，将100个精子集结成束，其向前运动性是单一精子的三倍。

The morphology and structure of reconstructed tissue was detected by microscope and scanning electron microscope.Results:(1) Compared with the control group, the cellular proportion of laminin group increased in 62 ~M phase, and decreased in Go~Gi phase significantly. As shown by the microscope, the cells of control group were in low density. The cells in mass connected tightly. The microfilament appeared reticular formation. The nucleus were the same in size. The cells of laminin group were in high density and put out so many lamellipodia, filopodia, which connected with the surrounding cells. The microfilament increased, elongated, and changed from reticulodromous to sarciniform, which reached to the pseudopods. The nucleus were different in size .(2) As shown by the inverted microscope and the cell growth curve, comparing with the controlgroup, cells of each test group increased evidently. The cellular proportion of each test group increased in S phase and G2 ~M phase, and decreased in Go~Gi phase significantly, but there was no considerable interations between LN and EGF;(3) As shown by the morphological observations, the cultured cat corneal endothelial cells formed an integrated membrane, and attached to the Descemets membrane closely, which was similar to the natural tissue. The cells connected tightly to each other, and some of them arranged in hexagon approximately.

结果：(1)层粘连蛋白组处于G_2～M期细胞比例较对照组显著提高，Go～G_1期细胞比例显著下降，提示层粘连蛋白促进内皮细胞DNA合成，及细胞分裂增殖；光镜下，对照组细胞分布成团状，细胞密度较低，细胞间连接紧密，细胞内微丝结成网状，细胞核大小一致；与对照组相比，层粘连蛋白组细胞生长旺盛，细胞密度高，向周边伸出大量板状及丝状伪足，细胞内微丝增多、拉长、集结成束，伸入伪足中，细胞核形状大小不一致；(2)倒置显微镜观察及细胞生长曲线显示，各组细胞数目随时间增加而明显增多，各实验组较对照组增生显著，EGF和LN联合应用组各时间点细胞数目最高；实验组处于S期和G_2～M期细胞数目增加，Go～G_1期细胞数目减少；提示EGF、LN单独及联合应用均可促进细胞增殖，但尚不能认为二者有交互作用；(3)倒置显微镜下，组织培养的猫角膜内皮细胞排列成密集的单层，细胞间连接紧密；组织学观察发现，培养的猫角膜内皮细胞形成完整的内皮层，贴附于脱水基质的后弹力膜上，与正常的角膜内皮组织结构相似；扫描电镜下，组织培养的猫角膜内皮细胞间紧密镶嵌排列，可见某些细胞呈近似六边形排列，细胞大小不甚一致，胞核清晰。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。