激光材料

The mechanical property testing shows that the seamless PLLA tubes perform excellent radial strength,which indicates that the mechanical properties of biodegradable stents made of these tubes was supposed to be excellent.PLLA and its composites were first used in preparing seamless tubes as antecedency of laser-cut biodegradable coronary stents in china.Finite element analyses of the biodegradable coronary stent model indicate the explorative design basically meets the requirement of reasonable and applicable stents.There is not such kind of research yet in domestic.Optimum laser-cuttting parameters of CO2 laser was cauculated based on experiential formula,within it,biodegradable coronary stents,especially those with complex structure would be manufacutured from seamless tubes quickly by laser microprocessing with high consistency to the design model.The processing efficiency of the CO2 laser demonstrated in experiential formula by us will play an important guiding role in manufacturing biodegradable stents by laser-processing.Our stents that ascribed to laser-cutted,slotted tube stent are proved to be biodegradable, self-expandable and good biocompatible,basically reach the international level on the aspest of manufacturing procedures and design.

研究结果表明：壳聚糖改性材料综合性能优于纯PLLA，更适合于作为可降解冠脉支架的原材料；自主设计的探索性自膨胀管状闭环型可降解冠脉支架的性能符合冠脉设计要求，设计、验证生物可降解冠脉支架模型的研究在国内还未见报道；制备的改性PLLA无缝管的力学性能优越，可通过激光切割获得冠脉支架，这是国内首次采用聚乳酸材料来制备通过激光加工出可降解冠脉支架的无缝管；二氧化碳激光器加工精度能达到加工要求，加工出来的血管支架名义设计与实测值误差小，实现了冠脉支架、尤其是带有复杂外观设计冠脉支架的快速化、规范化加工，对二氧化碳激光器加工聚乳酸材料的效果研究在国内外属于首创，获得的经验公式对日后的深入研究有重要的指导意义；制备的支架为激光切割管状闭环型冠脉支架，支架外观设计、支架加工手段、支架的性能都基本接近国际水平，支架样品符合设计的理念，可以实现自膨胀功能。

Under the current experiment conditions, it is difficult to completely understand the characteristics of laser ignition of energetic materials because of instantaneity and complexity of the process. Thus, researchers attach widespread importance to the method of numerical simulation.

由于含能材料激光点火过程的瞬时性和复杂性，在目前的实验条件下难以全面地了解含能材料的激光点火特性，因此用数值模拟方法来分析含能材料的激光点火特性受到人们的普遍重视。

Neodymium and samarium find use in alloys for magnets and lasers, europium in television screens, praseodymium in electric motors, and so on.

钕和钐可以用在磁或激光材料；铕可以用于电视屏幕；镨可以用于电动机，等等。

Research on preparation and luminescence of rare earth doped tellurite and phosphate glassy laser materials is authors mainly researched topics. In addition, the author has also studied for the application about the two kinds of materials.

作者硕士期间所作工作主要是掺稀土亚碲酸盐和磷酸盐玻璃激光材料的制备和发光的研究，在这基础上对它们的应用也作了相应探讨。

This work is useful for applications of Yb:NaY(WO_4)_2 laser in the future.

这些研究可能为Yb：NaY(WO_4)_2单晶激光材料的应用和后续研究提供重要的参考。

The existence of polymeric chain provides additional channels for the elimination of the absorbed energy along the polymer backbone, and with the correspondence increases the photostability and thermal stability of the dyes.

聚合物链的存在为共聚物体系的非辐射能提供了一个额外的通道，有利于体系的热稳定性和光稳定性提高，这为设计合成新型固体激光材料提供了理论依据。

The surface roughness of the laser shock peened medium has effect on the high frequency of laser-generated surface acoustic waves. As the impact times of the laser shock peening increase, the surface roughness has little effect on the dispersion of laser-generated surface acoustic waves. From the theoretical curve and experiment curve, it can ...

本文研究的结果，可对研究样品激光冲击硬化后残余应力、晶粒方向改变和错位密度增加分别对激光声表面波色散影响提供了基础，并对利用激光声表面波的色散特性来研究激光冲击硬化材料冲击层材料性质的变化具有一定的意义。

Sapphire dopped with Ti3+ is the best material of the tunable solid laser.

钛蓝宝石是目前最优异的固体宽带调谐激光材料，用于制作飞秒脉冲可调谐激光器。

Lasing wavelength of 808 nm semiconductor laser instead of the usual-pumped solid-state laser materials.

激射波长为808nm的半导体激光器代替通常的泵浦固体激光材料。

It can putout as high as 120mW power of 473nm blue laser. In my article, We analyze the energy level and Florence spectrum of Nd〓: YAG, make sure the value of the stimulated cross section and the absorb cross section.

在本论文中首先分析了Nd〓：YAG晶体的能级结构及其荧光谱线，计算出在946nm波长处的吸收截面和受激发射截面，并分析了Nd〓：YAG晶体能够在室温下以准三能级运转的原因，从而阐明它是目前最适合间接产生蓝光的激光材料。

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。。。。