Harmonic beam splitter design and fabrication

Two problems of half-wave hole and high ripples in the transmittance region for a harmonic beam splitter had been pointed out and analyzed. Based on the application of a half-wavelength control and a new admittance matching methods, a harmonic beam splitter was designed and fabricated. The former method eliminated the half-wave hole fundamentally, and the latter smoothed high ripples in the transmittance region effectively. The matching stack consisted of a symmetrically periodic structure and provided a complete matching at the desired wavelength, i.e., both conditions for the equivalent admittance and phase thickness were fulfilled. Furthermore, both the theoretical and the tested curves had been given, and a good agreement between them was obtained.     

爆炸驱动动能杆定向抛撒散布试验

动能反导技术作为新型的反导技术，原理是在拦截弹和目标的相对速度方向上，抛射出大量动能杆条毁伤目标。其核心技术之一就是动能元素的抛撒，特别是定向抛撒。国外研究一般集中针对既定抛撒装置结构的杆条抛撒结果验证性报道，缺乏对杆条抛撒影响因素的详细研究。本文提出了采用周向弧形状药选择区域爆炸驱动中心杆条束定向侧向飞散的动能扦定向抛撒装置方案，设计不同结构参数的杆条定向抛撒装置的试验，研究抛撒结构参数对动能杆的驱动特性影响规律，为新概念反导战斗部设计提供技术帮助。     

幂群所诱导的L—Fuzzy幂群

本文在幂群［１］的基础上，提出了幂群所诱导的Ｌ－Ｆｕｚｚｙ幂群、Ｌ－Ｆｕｚｚｙ幂群的λ－截、次幂群等一系列概念，并给出了幂群与其诱导的Ｌ－Ｆｕｚｚｙ幂群、λ截集群间的次同态、同态等关系。     

一种G分布的应用

本文利用Ｇ分布曲线对农村彩电的增长率进行了预测，并在概率意义下对其增长阶段进行了划分．     

Interface roughness, surface roughness and soft X-ray reflectivity of Mo/Si multilayers with different layer number

A series of Mo/Si multilayers with the same periodic length and different periodic number were prepared by magnetron sputtering, whose top layers were respectively Mo layer and Si layer. Periodic length and interface roughness of Mo/Si multilayers were determined by small angle X-ray diffraction (SAXRD). Surface roughness change curve of Mo/Si multilayer with increasing layer number was studied by atomic force microscope (AFM). Soft X-ray reflectivity of Mo/Si multilayers was measured in National Synchrotron Radiation Laboratory (NSRL). Theoretical and experimental results show that the soft X-ray reflectivity of Mo/Si multilayer is mainly determined by periodic number and interface roughness, surface roughness has little effect on reflectivity.     

Effect of Alumina and Chromium Interlayers on Microstructures and Optical Properties of Thin Ag Films on Glass Substrates

Effects of alumina and chromium interlayers on the microstructure and optical properties of thin Ag films are investigated by using spectrophotometry, x-ray diffraction and AFM. The characteristics of Ag films in Ag/glass, Ag/l2O3/glass and Ag/Cr/glass stacks are analysed. The results indicate that the insertion of an Al2O3 or Cr layer decreases the grains and influences the reflectance of Ag films. The reflectance of the Ag film can be increased by controlling the thickness of alumina interlayer. The stability of Ag films is improved and the adhesion of Ag films on glass substrates is enhanced by alumina as an interlayer.     

退火对电子束热蒸发193nm Al2O3/MgF2反射膜性能的影响

设计并镀制了193nm Al2O3/MgF2反射膜,对它们在空气中分别进行了250-400℃的高温退火,测量了样品的透射率光谱曲线和绝对反射率光谱曲线.发现样品在高反射区的总的光学损耗随退火温度的升高而下降,而后趋于饱和.采用总积分散射的方法对样品在不同退火温度下的散射损耗进行了分析,发现随着退火温度的升高散射损耗有所增加.因此,总的光学损耗的下降是由于吸收损耗而不是散射损耗起主导作用.对Al2O3材料的单层膜进行了同等条件的退火处理,由它们光学性能的变化推导出它们的折射率和消光系数的变化,从而解释了相应的多层膜光学性能变化的原因.反射膜的反射率在优化联系、镀膜工艺与退火工艺的基础上达98%以上.     

质子交换铌酸锂多模干涉光功分器的研制

采用退火质子交换工艺在铌酸锂衬底上实现了渐变边界MMI光功分器。测量表明该器件有较好的光均分功能。利用红外光谱技术分析了利用纯苯甲酸质子交换源的退火质子交换波导的红外吸收光谱特性证明通过当地选择质子交换温度、时间和退火的温度与时间，可以实现低损耗质子交换光波导的制作。     

溅射功率对多层膜质量的影响

用磁控溅射技术制备薄膜，用X射线衍射研究在基片和靶间距离固定的情况下不同的溅射功率对薄膜结构的影响。结果表明：过低的溅射功率下淀积的薄膜有畸变的X射线衍射特征峰，特征峰强度小，半峰全宽大。而比较高溅射功率得到的薄膜有比较尖锐的X射线衍射特征峰，强度高和半峰全宽非常窄。研究表明，X射线衍射特征峰强度小和半峰全宽大的薄膜结构疏松，而强度高和半峰全宽非常窄的薄膜结构致密。     

高等数学教学方案的研究与改革

1　指导思想与主要内容随着现代科学技术 ,特别是高新技术的迅猛发展 ,对现代科技人才的数学知识结构、能力、综合素养等方面都提出了更高的要求 ,而我国目前工科数学的数学体系绝大部分仍然沿袭以知识传授为主的传统教学模式 .这种传统的工科数学教育已经远远不能适应飞速发展的科学技术的需要 ,工科数学必须进行全方位的改革 .高等数学是工科大学生的一门十分重要的基础理论课程 ,而传统的教学方案 ,重知识的传输 ,轻能力的培养 ;重技巧的训练 ,轻数学思想的学习 ;重理论教学 ,轻数学应用的训练 .由此培养的学生很难适应时代和社会发展的…