In the region of shorter wavelength ( r < 10nm ) , measurement reflectivity is much lower than design reflectivity , so the making of high reflectivity multilayer mirrors is at the phase of exploring . the aim of the paper is to design and fabricate five mulitilayer mirrors in shorter wavelength of soft x ray region and makes up of soft x ray spectrometer which is applied to icf experiment 本论文所完成的是在软x射线短波段的五个波长处(最短波长为1 . 03nm ) ，研制具有实用反射率的软x射线多层膜反射镜，并应用于惯性约束核聚变( icf )实验中的软x光能谱测量。
Although the linear strip theory has developed for a long time , based on such a theory there also exist some deficiencies in the software system of ship motions and wave loads . for instance , the software cannot give rational results under the condition when the wave - length is relatively short 关于线性切片理论：线性切片理论本身已经发展成熟，但已有的基于线性切片理论的船舶运动与波浪载荷预报软件系统存在着某些不足之处，在短波长情况下，往往不能给出合理的结果。
Solving the static correction problems under complex near - surface conditions is a systematic engineering . first , careful field weathering investigation must be done , then we have to take full advantages of refraction first - break information and field weathering investigation information to compute field static correction and large residual static corrections with various refraction first - break statics methods , finally , reflection statics methods are used iteratively to solve the residual statics problems . to solve serious static correction problems in complex near - surface areas of western china , different refraction first - break statics methods are studied in this thesis . the main study contents are as follows : 1 ) the propagation features of refraction for horizontal layered and dip media are studied firstly , it lays a good theoretical foundation for later statics method studies 本文针对目前西部油气勘探中迫切需要解决的复杂地表区静校正技术难题，对初至折射波解决二维和三维长、短波长静校正问题的正反演方法进行了深入的研究和探讨，研究内容主要包括( 1 )水平层状和倾斜界面折射波的传播规律，为后续的折射静校正方法研究奠定理论基础； ( 2 )二维复杂层状介质地震折射波正演方法，该方法可适用于折射面起伏不大、低速层和折射层速度变化不大的情况。
The first generation uses the shortwave ( 0 . 8 m - 0 . 9 m ) and multimode fiber , and the second generation uses long wave ( 1 . 3 m , 1 . 5 m ) and singlemode fiber . and now the third generation uses dwdm fiber - communicating technic . sichuan wide band transmission net optical fiber system is an important project of sichuan telecom 宽带传输网从采用短波长( 0 . 8 - 0 . 9 m )和多模光纤的第一代光纤通信技术到采用长波长( 1 . 3 m 、 1 . 55 m )和单模光纤的第二代光纤通信技术发展到了今天采用dwdm ( densewavelengthdivisionmultiplexing )的第三代光纤通信技术。
So , in the process of laser powder rapid micro - fabrication , to gain the fine light solidification unit , mainly should adopt two following aspects : 1 . using the laser that has the mini - focus spot . usually select the doubling frequency laser or fiber laser 要想获得细小的光固化单元,对于激光粉末快速微成形工艺而言,主要从下面两个方面入手: 1 .使用光斑直径细小的激光器2 .选择粉末颗粒直径小的金属粉末作为激光粉末快速微成型固化材料为了解决精细聚焦问题,我们采用nd : yag倍频的方法获得短波长激光器。
Due to its intrinsic merits , such as wide band gap , high electron saturated drift velocity , high melting point , good coefficient of thermal conductivity , anti - radiation and good chemical stability , gallium nitride as a direct band gap semiconductor has become the promising material for the application of short - wave light - emitting devices and high temperature , high frequency and high power electronic devices Gan是直接带隙半导体材料，以其禁带宽度大、电子饱和漂移速度大、熔点高、热导率高、抗辐射能力强和化学稳定性好等优点成为制造短波长光发射器件及高温、高频、大功率电子器件的理想材料。
