查询词典 fiber-optic

The transmission spectra of fiber Bragg grating in photonic crystal fiber and conventional fiber are compared.

比较了光子晶体光纤中布拉格光栅与常规布拉格光栅的传输谱。

With given parameters of the fiber grating, the transmission spectrum of the long-period fiber grating was obtained by simulation with Matlab. As a result, the position of the resonant wavelength of the long-period fiber grating is decided by the grating′s period. The attenuation changes with the length and refractive index of the grating.

在设定的光纤光栅参数条件下，通过Matlab进行模拟得到了最终需要的长周期光纤光栅透射谱，并由此得出：长周期光纤光栅谐振波长出现的位置主要由光栅的周期决定，损耗大小可以通过调节光栅长度和折射率来实现。

Beginning with wave equation, the paper has deduced the propagation of gauss pulses in single mode fiber and fiber grating transmission compensation. The characteristics of cascaded phase-shift gratings are discussed by numerical simulations of coupled-mode theory and T-matrix method. The experimental works and measurement results are shown in this paper. On the other hand, we have introduced the basic theory of EDFA and figured out the characteristics for EDFA at different conditions by numerical simulation. Some experimental results for EDFA are also presented here. In this article, you can find the influence on Optical Fiber Amplifier by Gain Tilt, especially, the negative effect on CSO in CATV transmission system.

论文首先从波动方程入手，对高斯脉冲在单模光纤中的传播演化及光纤光栅透射补偿进行了详细的研究；较系统地介绍了光纤光栅的耦合模理论，并将传输矩阵计算法用于计算级连相移光纤光栅的光学特性；重点介绍了作者在光纤光栅刻制及特性测量方面所做的一些实验研究工作；较系统介绍了EDFA的基本理论，计算出各种条件下EDFA的光学特性，并进行了一些实验研究；综合分析光纤放大器对光纤传输系统的影响，特别分析了光纤放大器增益不平坦对光纤CATV系统中CSO恶化的原因及其解决方法，并研究了光纤布拉格光栅在稳定980nm泵浦源输出功率和输出波长方面的应用；结合一个基于光纤光栅和光纤放大器的光纤用户接入网方案，对光纤用户接入网的若干问题进行了理论与初步的实验研究。

Division I provide a full range of composite materials products, including: Carbon Fabrics (1K, 3K, 6K, 12K-Plain, Twill Fabrics), Hybrid-Carbon Fibrics, Carbon AND Kevlar Hybrics、Carbon Fiber Pre-preg, Fibreboard and Carbon Sheet, PU leather Carbon Fiber (bags, purses, gloves, Shoes only), Plated Colorized Glass Fabrics (1 K, 3K-Plain, Twilled),Glass Fibreboard, PU leather glass fiber , Imitation Black and White Plain Fiberglass (1 K, 3K, 6K), Kevlar Fibrics, Nomex Honeycomb.

我司提供全面的复合材料产品，包括：碳纤维布（1K、3K、6K、12K平、斜纹、3K斜纹单面定型布专业使用于汽车大包围）、碳纤维混编织玻纤布、碳纤维混编织凯芙拉布、碳纤维预浸布、碳纤维板及片材、PU碳纤维皮革（箱包、钱包、手套、鞋专用）、彩色电镀玻璃纤维布（1K、3K平、斜纹）、电镀玻璃纤维板，PU玻璃纤维皮革、仿黑白编织玻纤编织布（1K、3K、6K）、凯芙拉编织布、Nomex纸蜂窝。

By comparing of different treating methods of wood-fiber: treated with silane coupling agent, NaOH solution and silane coupling agent, grafted by poly, it can be found that grafted wood-fiber evenly distributed in PVC matrix. Grafted wood-fiber and PVC matrix had a better interfacial compatibility than that of the ungrafted wood fibers, which was verified by scanning electron microscope observation.

比较了硅烷偶联剂处理、氢氧化钠溶液浸泡与硅烷偶联剂双重处理，接枝改性等3种木纤维表面处理方法对木纤维／PVC复合材料界面及性能的影响，通过扫描电镜照片发现接枝改性木纤维在PVC基体中分散更均匀，与PVC界面相容性好。

The unoperated sides of the treated animals also served as controls. Six normal rats were treated as normal control group. Three different siRNA plasmid solution containing RC2-Ⅰ, MAFbx-Ⅱ, CON (50μl , 0.8μg/μl)was injected and transfected by electroporation as methods mentioned above, respectively. The changes of RC2 and MAFbx mRNA levels and RC2 protein levels after 3 days were determined by real-time quantitative PCR and Western blot, respectively. On postoperative 2, 3 and 4 weeks, the rate of wet muscle weight preservation, mean diameter of muscle fiber and mean cross-section area of muscle fiber and muscle protein content were checked and then compared between group CON and group RC2 or group MAFbx, respectively. The differences between groups were analyzed by one-way ANOVA. Ultrastructural changes of muscle fiber were observed at 2, 3, 4 weeks postoperation.Results GFP plasmid was efficiently deliverd into muscle by electroporation and robust GFP expression in muscle could be observed more than three weeks. Histology shows that injected plasmid DNA diffuses extensively in muscle tissue.

1、健康雌性SD大鼠18只，随机分为电穿孔组和非电穿孔组，每组9只，制作右下肢趾长伸肌失神经支配模型；EP组为将质粒pEGFP-N1溶液50μl(0.8μg／μl)注射入右趾长伸肌后，立即于两侧腱腹交接处给予电穿孔，电穿孔参数为：电场强度为200V／Cm，脉冲100μs，频率1Hz，施加10次脉冲；NEP组仅质粒pEGFP-N1溶液注射；转染后1、2、3周，荧光显微镜下观察趾长伸肌中GFP的表达情况，转染后1周行Western印迹检测趾长伸肌中GFP蛋白的表达情况，检测和优化体内转染效率。2、健康雌性SD大鼠78只，随机分为失神经对照组、RC2基因治疗组(RC2组)，MAFbx基因治疗组，每组24只，制作右下肢趾长伸肌失神经支配模型，余6只为正常组；分别将含CON、RC2、MAFbx基因的siRNA重组质粒注射入趾长伸肌，之后给予电穿孔，方法同上；治疗后3天实时定量PCR和Western印迹检测各组中RC2或MAFbx基因的mRNA和蛋白的表达变化，治疗后2、3、4周检测各组肌湿重维持率、肌细胞直径和肌细胞截面积，肌细胞超微结构变化以及肌纤维中蛋白含量变化。

The specific properties of materials, such as the palate adhesion, dynamic cruor, anti-bacterial and the degradability of lysozyme, were studied, which provide valuable data for further application. The main creative ideas are listed as follows:(1) The water-retention chitosan/poly vinyl alcohol blend fiber was obtained by coagulating in 10％ NaOH/ethanol solution, and the blend and crosslink due to GA can enhance the mechanical properties of fiber;(2) The controlled degradable chitosan/gelatin blend fiber was obtained by solution filature, and the mechanical properties were improved;(3) The N-acylchitosan with the different degree of substitution were successfully prepared, and the relationship between structure and properties was estabilished;(4) By a new solvent system of 6％ NaOH/4％ urea for cellulose, the blood anti-coagulant function films were prepared by blending cellulose with chitin;(5) In the same solvent system above mentioned, the anti-bacterial blend films based on cellulose and carboxymethyl-chitosan were prepared, and the relationship of DS and the anti-bacterial property was concluded;(6) The controlled degradable chitosan films was obtained by the chemical crosslink.

本论文的主要创新点：（1）以NaOH水溶液／无水乙醇为凝固液，采用溶液纺丝法制备出保水性壳聚糖／聚乙烯醇纤维，共混和戊二醛交联极大提高了壳聚糖纤维力学性能；（2）用壳聚糖和明胶共混，以溶液纺丝法制备出可控降解的壳聚糖／明胶纤维，并大幅度提高了壳聚糖共混纤维的干、湿态抗张强度；（3）确立了不同取代度N-酰基壳聚糖的合成方法及其膜的结构与性能的关系；（4）利用纤维素新溶剂6％NaOH／4％尿素制备出抗凝血性纤维素／甲壳素共混膜；（5）利用上述纤维素新溶剂制备出抗菌性纤维素／羧甲基壳聚糖共混膜，揭示了羧甲基壳聚糖取代度与抗菌性能的关系；（6）制备出可控降解壳聚糖交联膜。

In this paper, based on the experimental studies, the effects of the ARC-3 glass fiber for the improvement of the flexural tensile and the unconfined compressive of the concrete are analysed. Further statistical relations between flexural tensile strength, volume ratio of fiber and curing time, and a mathmatical model of the flexural tensile is presented. Finally, the optimum fiber volume ratio in the concrete is presented. In this paper, a mathematical model of the volation between the flexural ten...

本文通过大量试验研究，分析了ARC-3型高耐碱玻璃纤维对水混混凝土抗折强度及抗压强度的增强效果；提出了抗折强度与纤维掺量和龄期的统计关系，以及抗折强度的数学模型；提出了最佳纤维掺量；从玻璃纤维增强混凝土的应力-应变关系分析了其塑性性质和抗裂性能，对其抗压模量和抗弯模量的测试分析，提出工程设计时可忽略模量的变化；本文给出的抗折强度与抗压强度关系的数学模型，可直接供生产单位使用。

The main products are the yacht made in glass fiber,fishing wessel,autobody in glass fiber,and galss fiber fittings of the ship,and so on.

主要生产玻璃钢游艇、渔业用船、玻璃钢车车身、三轮车车身及轮船用玻璃钢配件。

All results reveal that wheat straw fiber may possibly replace wood fiber as raw material of fiber board.

以上研究表明热磨法麦秆纤维有可能代替木纤维作为纤维板原料。

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。