On Kendall＇s Conjecture for an ExtendedBirth-death Q-processes with InstantaneousState and Catastrophes

A new structure with the special property that instantaneous state and catas-trophes is imposed to ordinary birth-death processes is considered. Kendall‘s conjecture forthe processes is proved to be right.     

Mid—Infrared Optical Parametric Oscillator Based on All—Solid—State—Pumped Periodically Poled LiNbO

We report the tunable mid-infrared generation with a periodically poled LinbO3(PPLN).Using an all-solid-state pumped Nd:YVO4 laser as the pump source and a PPLN nonlinear crystal with grating periods of 28.2-30.8μm,we have achieved wavelength conversion in the 2.90-4.05μm spectral range by period tuning.The use of confocal cavity design has brought a compact,all-solid-state configuration with an average output powers of idler up to -200mW.The maximum power of 277mW was obtained at the wavelength of 3.35um.     

激光微加工技术在ICF中的应用

建立以二极管泵浦的Nd：YAG连续固体激光器为基础的微结构加工平台。激光器谐振腔输出基横模，输出波长1064nm，采用调Q技术压缩脉宽，激光器输出峰值功率大于10w，可选择连续及脉冲工作方式。     

固体激光器的灯泵浦和二极管泵浦方式比较

对固体激光器的灯泵浦和二极管泵浦方式进行了比较,详细分析了不同类型的固体激光器所适用的泵浦方式.指出二极管泵浦固体激光器是今后固体激光器的发展趋势.     

资产的拓展、描述与物元统计

本文提出了广义无形资产的概念,并将其内涵界定为无形资产与知识资产.为形象直观地反映企业的资产构成,本文尝试物元量的演化,并对资产进行物元描述与统计.     

加工中心本体故障模式的统计研究

本文对加工中心整机及机床本体的故障模式及其分布规律进行研究,分析了产生故障的原因,指出了提高加工中心可靠性的途径.研究表明加工中心机床本体故障率最高,刀库与机械手是其可靠性最薄弱的环节.