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特种动物毛纤维表面形态和超微结构的研究 总被引:11,自引:0,他引:11
本文应用电镜技术,对3个种类13个品种的特种动物毛纤维进行了表面形态和超微结构的研究。结果表明,不同种的动物毛纤维肯人独特的表面形态特征,在内部超微结构上的存在明显的差别。这一结果,对各种纤维的鉴别,正确的区分动物的种属,提供了可靠的依据。 相似文献
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总结了过去对镍电极容量性能研究取得的成果和存在的问题,介绍了纤维复合镍电极的制作工艺,即纤维复合镍基体成型,烧结和电化学浸渍。研究了纤维复合镍电极的电化学性能,并探讨了它的活化机理;研究结果发现纤维复合镍电极的体积比容量为125 ̄175mAH/cm^2重量比容量为250 ̄340mAH/g,与粉末烧结式镍电极相比,重量比容量提高66% ̄72%,体积比容量相近,最后还介绍了理论研究用的纤维复合镍电极。 相似文献
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光子晶体纤维一般为用石英玻璃制作的有孔纤维,它们在3μm~20μm的中红外和远红外光谱范围内是不透明的。最近,以色列Tel-Aviv大学的研究人员利用卤化银(AgClxBr1-x)晶体材料制作出了在上述光谱范围内高度透明的新颖光子晶体纤维。这种光子晶体纤维由两种固体材料构成:其芯为纯AgBr(n=2.16),包层为AgCl(n=1.98)。研究人员对已制成的外径为1mm、长度约为1m的这种软性光子晶体纤维进行了测试。结果表明,其性能与理论模拟非常一致。这种新颖的卤化银光子晶体纤维对于红外激光功率传输、红外辐射测量以及红外光谱学都是极其有用的。 相似文献
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伴随着科学技术的日新月异,电力系统通信凭借其自身的独特优势在社会上引起了广泛的重视。并且在当前的电力光纤通信网络建设过程中,电力特种光缆正发挥着越来越重要的影响和作用。从未来的发展情况上来看,智能电网是主流趋势,为了促进智能电网的顺利实现就应当对电力通信系统进行完善和优化,借助于特种光缆的作用来使电力通信系统取得较快发展,满足电力系统痛心的特殊需要。本文就将主要以电力通信特种光缆技术应用研究为切入点,对其进行简要的介绍和分析。 相似文献
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研究α-Synuclein蛋白纤维的积聚和解聚过程对于帕金森症等神经退化性疾病的预防和治疗有着重要意义。本文利用原子力显微镜对α-Synuclein的积聚过程的不同阶段进行了研究,并在此基础上对已经积聚形成的α-Synuclein纤维在溶液中的解聚过程进行了原位观察。实验结果表明:α-Synuclein积聚过程包括单体一寡聚体一短纤维一长纤维这几个阶段;而α-Synuclein纤维在浓度降低的情况下,会发生解聚,解聚是从纤维的中间发生断裂开始,经过一段时间后.长的蛋白纤维会解聚成为一些短纤维和很多蛋白颗粒。 相似文献
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本文从光纤宽带区域网的发展、制式和应采取的策略等方面加以探讨;指出只要我们的方针政策制定得正确,建立我国的光纤宽带区域网工业是可行的。 相似文献
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《III》2003,16(6):18
Southampton Photonics Inc (SPI) and the Optoelectronics Research Centre (ORC), University of Southampton, UK, have demonstrated over 600W from a single fibre laser. The team believes this to be the highest power reported to date with a single fibre gain module, demonstrating that cladding pumped fibre lasers can produce the high powers needed to compete with more traditional laser technology, in applications such as remote welding, by offering high powers which preserve beam quality. Led by Dr Johan Nilsson researchers produced over 600W output power at 1090μ from an Ytterbium Doped Fibre Laser, one of the most efficient lasers available. According to SPI’s roadmap, single fibre, single-mode output powers well in excess of 1kW will be achievable. These lasers can then be combined to produce multi-kW solutions with excellent beam quality, efficiency and reliability. The work was funded by DARPA under its High Power Fibre Laser programme.This is a short news story only. Visit www.three-fives.com for the latest advanced semiconductor industry news. 相似文献
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FCoE Application on Network Service of Geographic Information 总被引:1,自引:0,他引:1
ZHAO Di 《半导体光子学与技术》2008,14(1):37-41
The network service of geographic information has developed rapidly based data sharing on the web. It has an basic capability to satisfy the requirements from various users, but the network transporting efficiency of sharing data is affected greatly by the distinct environment of network resources. The emergence of fibre channel over Ethernet(FCoE) technology solves the problem preferably. FCoE allows IP protocol and fibre channel network traffic to be carried over existing FCoE-aware drivers, NICs, and switches. It also allows an evolutionary approach towards input/output (I/O) consolidation by preserving all fibre channel constructs. FCoE simplifies customer environments by using Ethernet and allowing the industry to avoid creating another, separate protocol for I/O consolidation. The advantages of FCoE increase network transport efficiency of geographic information. 相似文献
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J. Merkel 《BT Technology Journal》2002,20(4):71-80
The current situation in the submarine fibre optics market is described. The submarine business is suffering from the same malaiseas the rest of the telecommunications industry. Some reasons and present trends are outlined in this paper. Unrepeateredsubmarine systems are not so seriously affected by the downturn as the repeatered sector, and offer fresh opportunities for newsuppliers previously excluded from the submarine market. In this case, collaborations with other companies are a preconditionsince customers expect complete, turnkey projects. Typical applications of unrepeatered systems are presented and theeconomics of unrepeatered versus repeatered systems are compared, showing the benefits of unrepeatered systems. The successof systems based on technologically enabling factors, such as FEC schemes, fibre types, and the compensation of nonlineareffects, are discussed together with future technological developments. Finally, a successful example of the deployment of anunrepeatered submarine system (ARCOS 1) is presented. 相似文献
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Kobayashi M. Yoshida T. Asakawa S. Arishima K. Hirayama M. Kominato T. Goh T. Hida Y. Sumida S. Kawai T. 《Electronics letters》2000,36(17):1451-1452
The authors present a technique for fibre management on a circuit board, which utilises newly-developed, flexible optical fibre circuits and multifibre physical contact connectors. The technique achieves compact fibre wiring and easy fibre connection for hundreds of fibres on a circuit board. The authors have fabricated a compact 8×16 delivery and coupling switch board using the technique 相似文献
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The realisation of tightly bent PANDA polarisation maintaining fibre with minimal reduction of extinction ratio and throughput power is described for the miniaturisation of polarisation maintaining fibre circuits. After mechanically side-polishing the bare PANDA fibre, bend diameters as small as 1 mm have been achieved that preserve the fibre s extinction ratio ( 35 dB) with minimal loss ( 0.1 dB). 相似文献
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The fabrication process, numerical analysis and polarising characteristics of the D-shaped optical fibre coated with chromium film have been investigated. An optical fibre polariser was fabricated by coating the flat side of the D-shaped fibre, which was obtained by drawing the side-cut D-shaped preform made from the MCVD process, with chromium metal film. The maximum extinction ratio of the fibre polariser was found to be ~55 dB 相似文献
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The cutoff frequencies of guided modes in a weakly guiding W-type fibre with parabolic core profile have been obtained. It is found that the cutoff frequency of the TE01-mode in such a fibre is much higher than for a homogeneous-core W-type fibre. This should allow greater ease in splicing. 相似文献