聚焦

The key decisions can all be characterized by focus, focus and focus.

我们所有的关键决策可以用三个词来概括：聚焦、聚焦、在聚焦。

The key decisions can all be characterized by focus,focus and focus.

我们的所有的关键决策可以用三个词来概括：聚焦、聚焦、再聚焦。

The results are detailedly compared with those of commercial application using aspherical cylindrical lens.

对自聚焦光纤透镜的原理进行了分析，综合考虑到自聚焦光纤透镜的焦距和端面研磨的方便，确定了实验中自聚焦光纤透镜的长度。

Based on simulation results, the field characteristics of some kinds of non-axisymmetric focusing surfaces, including cylindrical surface and ellipsoidal surface, are analyzed.

以声场模拟为基础，分析了包括柱面聚焦和扁椭球面聚焦等在内的几类非轴对称聚焦曲面声场特性。

Coupling systems between LD and optical fiber are separated into two categories: micro-lens optical fiber system and disjunct lens one.

针对由柱透镜和聚焦透镜组成的组合透镜耦合系统中存在的封装和调试困难等问题，提出了：用一段直径为600μm的裸石英光纤代替柱透镜，对半导体激光器输出光束进行准直整形；用球透镜光纤对准直后的光束进行聚焦，直接实现和光纤耦合，来代替聚焦透镜和光纤耦合的环节。

TV - Diggnation CNET - First Look, Buzz Report Discovery Channel - Highlights National Geographic - Highlights MTV - MTV News, music videos NBA - News and match highlights UNITED KINGDOM BBC - Highlights from Top Gear, Torchwood, Goodness Gracious, QI SKY - Sky News ITN - News and Showbizz Megawhat.

TV-D ig gnation接受C NE T-第一看，信号报告探索频道-聚焦国家地理-聚焦MT V- MT V新闻，音乐视频联盟-新闻和比赛突出联合王国英国广播公司-聚焦从顶部齿轮，火炬木小组，善仁慈，戚天空-天空新闻I TN电视台-新闻和S h owbizzMe gawhat。

Firstly, we prove the existence and the uniqueness of the hyperfocal subalgebra when the coefficient field is split for a defect pointed group; then, considering the structural pattern of source algebras over arbitrary fields, by means of G-acted groups, we reduce the existence and the uniqueness of the hyperfocal subalgebra over an arbitrary field to the case that the coefficient field is split for a defect pointed group and the inertia group stablizes a hyperfocal subalgebra.

首先我们证明了如果系数域对亏点群是分裂的，则源代数的超聚焦子代数存在且共轭唯一；然后通过考虑任意域上源代数的结构模式，以G-作用群为手段，将超聚焦子代数的存在性和唯一性归结为系数域对亏点群是分裂的情况下惯性群稳定的超聚焦子代数的存在性和唯一性。

Building on this crawler, we developed a rule-based crawler, which uses simple rules derived from interclass linkage patterns to decide its next move.

该文针对聚焦爬虫这一研究热点，对现今聚焦爬虫的爬行方法(主要是网页分析算法和网页搜索策略)做了深入分析和对比，提出了一种改进的聚焦爬行算法。

Based on the traits of the aspherical lens, the sunlight was focused on a very small spot, and then it was transferred into a plastic fiber by an aspherical lens and a selfoc lens. A formula for calculating the optimal length of selfoc lens is presented. The optimal assembly of the aspherical lens and selfoc lens was implemented by the aid of this formula. Therefore, sunlight is coupled into a plastic fiber efficiently.

根据非球面透镜垂轴球差小的特点把太阳光会聚到很小的光点，再利用长度约为1/4节距的自聚焦透镜改变光线的数值孔径使其满足光纤的数值孔径，通过一个计算公式来计算最佳的自聚焦透镜长度，实现非球面透镜和自聚焦透镜的最佳组合，把太阳光以较高的耦合效率耦合进塑料光纤。

In this paper, the propagation and focus properties for several modes describing hollow beam are analyzed, and the focus properties for hollow gaussian mode are particularly discussed. Furthermore, a new mode, high-order Bessel-Gauss mode, is put forward to describe hollow beams. The results for high order Bessel-Gauss beams propagating through lens focusing system and free space are derived by terms of Collins integral formula.

本文分析了几种描述空心光束数学模型的传输特性和聚焦特性，着重讨论了描述非中空光束的数学模型的聚焦特性；同时提出了一种描述完全中空的空心光束的新模型――高阶贝赛耳高斯模型，并且运用Collins积分公式，分析了这种新模型的空心光束的传输特性和聚焦特性。

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。。。。