光纤

Oxygen sensitive materials had been prepared by carrier covalence method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen.

氧敏感材料在光纤溶解氧传感器中的应用：该传感器的响应时间为20s，重复性和稳定性较好，不受溶液pH值的影响，但受水温影响较大，只能用于低温溶解氧的检测。

Major content of this work includes five aspects as follows:(1). Oxygen sensitive materials had been prepared by carrier covalence method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(2). Oxygen sensitive materials had been prepared by carrier covalence-cross linking method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen and spectrophotometer, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(3). For the detection of gaseous oxygen, the fiber optical sensor on basis of oxygen sensitive materials had a respond time of 10s, detection limit of 5ppmand detection precision of 0.5%. The sensor had good repeatability and stability, a less delay and at least 1 year life-span.

本论文主要包括以下五个方面的内容：(1)载体共价法制备氧敏感材料：通过红外光谱、扫描电镜图谱和氧测试实验探讨该氧敏感材料的制备机理，通过氧测试实验评价该氧敏感材料的氧敏感性和稳定性，同时研究了各种因素对该氧敏感材料性能的影响(2)载体共价—交联法制备氧敏感材料：通过红外光谱、扫描电镜图谱和氧测试实验探讨该氧敏感材料的制备机理，通过氧测试实验和分光光度计评价该氧敏感材料的氧敏感性和稳定性，同时研究了各种因素对该氧敏感材料性能的影响(3)氧敏感材料在光纤气态氧传感器中的应用：该传感器的响应时间为10s，检测下限为5ppm，检测精度为0.5％，具有较好的重复性和稳定性，迟滞较小，使用寿命至少为1年，适合各种环境下气态氧浓度的检测。

SDH composed of some network elements is a network, which synchronously transports information with multiplexing, add division and cross-connect by fiber.

同步数字体系SDH，是指由一些SDH网元组成的，在光纤上进行同步信息传输、复用、分插和交叉连接的网络。

If you really worry about EMI and crosstalk between cables, fiber is of

如果你真是非常担心EMI和线间串扰的，光纤会是最终的选择。

The small signal current sensitivity of twisted fibers is analyzed and calculated theoretically, and a new and more convenient method to measure the Verdet constant is proposed and verified experimentally.

从理论上分析、计算了扭转光纤对小信号电流灵敏度的影响，提出了一种新的更为简便的方法测量费尔德常数，并用实验验证。

The company's main products are: high-power LED light series, LED Outdoor Landscape Lighting, LED guardrail lamps, LED buried lights, LED underwater lamp, LED contour light, LED brick lights, LED curtain lights, LED lights line, LED lawn lamp, LED colorful change light, LED digital light, LED LED module, LED lamp cup, LED bulb, Garden lights, stainless steel lamp, fiber optic lights, LED decorative lamps, LED lamp dot matrix, LED LED advertising word LED dedicated module, LED advertising lamp, LED tube lights, LED backlight source, Super bright LED, LED bulb, LED string lights, LED lanterns, LED flashing lights, LED luminous characters such as LED lamps and lighting products and a variety of custom shaped LED lamps, Lighting Products.

本公司的主要产品有：大功率LED光源系列、LED户外景观灯照明、LED护栏灯、LED地埋灯、LED水底灯、LED轮廓灯、LED地砖灯、LED幕墙灯、LED线条灯、LED草坪灯、LED七彩变色灯、LED数码灯、LED发光模块、LED灯杯、LED球泡、庭院灯、不锈钢灯、光纤灯、LED装饰灯、LED点阵灯、LED发光管、广告字LED专用模组、LED广告灯、LED软管灯、LED背光源、、超高亮LED、LED灯泡、LED灯串、LED彩灯、LED闪灯、LED发光字等各种LED灯具和灯饰产品，并承接定做各种LED异形灯具、灯饰产品。

The company currently has major products: LED display, LED guardrail lamps, LED railing lamp, LED contour light, LED brick lights, LED curtain lights, LED lights line, LED buried lights, LED underwater lights, LED lawn lamp, Colorful LED lights change color, colorful chasing LED digital light, LED lamp LED modules, LED lamp cup, the ball lights, LED night lighting, LED Outdoor Landscape Lighting, Garden lights, stainless steel lamp, fiber optic lights, small-scale sculpture lights, LED decorative lamp, a tube-li, LED color wall lamp, LED lamp dot matrix, LED LED advertising word LED dedicated module, LED advertisement lamp, LED tube lights, LED backlight, high-power high-brightness 1w, 3w, 5w LED, Super bright LED, LED bulb, LED string lights, LED lanterns, LED flashing lights, LED luminous characters such as LED lamps and lighting products and a variety of custom shaped LED lamps, Lighting Products.

本公司目前主要生产的产品有：LED显示屏、LED护栏灯、LED栏杆灯、LED轮廓灯、LED地砖灯、LED幕墙灯、LED线条灯、LED地埋灯、LED水底灯、LED草坪灯、LED七彩变色灯、七彩追逐LED数码灯、LED发光模块灯、LED灯杯、灯球、LED夜景照明灯具、LED户外景观灯照明、庭院灯、不锈钢灯、光纤灯、小品雕塑灯、LED装饰灯、丽得管、LED变色壁灯、LED点阵灯、LED发光管、广告字LED专用模组、LED广告灯、LED软管灯、LED背光源、大功率高亮度1w、3w、5w LED 、超高亮LED、LED灯泡、LED灯串、LED彩灯、LED闪灯、LED发光字等各种LED灯具和灯饰产品，并承接定做各种LED异形灯具、灯饰产品。

So,the curving should be confinedwithin some extent,and large curving should be tried to avoid.

因此，在实际应用中应将光纤的弯曲控制在一定范围内，强烈的弯曲是应当尽量避免的。

This article finally also introduced in the single model optical fiber the curving loss application.

本文最后还介绍了单模光纤中弯曲损耗的应用。

Fiber attenuation was measured as 6.84dB/m at 1550 nm by the cutback method.

采用剪断法测得在1550 nm波长下光纤的传输损耗为6.84 dB/m。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。