干扰抵消型多用户检测器性能分析

用模块化的方法描述了 ＳＩＣ、ＭＳＳＩＣ、ＰＩＣ和ＰＳＩＣ干扰抵消多用户检测算法，给出算法的实现结构图，并且在渐近有效性、抗远近效应、系统容量和实现复杂度诸方面进行了性能比较分析。分析表明需要进行功率排序的ＭＳＳＩＣ、ＰＳＩＣ和ＳＩＣ算法比ＰＩＣ算法具有更好的抗远近效应的性能，ＭＳＳＩＣ和 ＰＳＩＣ算法在渐近有效性和系统容量方面要显著强于ＳＩＣ和ＰＩＣ算法。     

纳米ZnO薄膜制备及液态源掺杂

用真空蒸发法在玻璃和单晶硅片 (10 0 )上制备Zn薄膜 ,然后对Zn薄膜进行氧化、热处理获得纳米ZnO薄膜。对在硅片上制备的Zn薄膜一次性进行高温掺杂、氧化获得纳米ZnO∶P和ZnO∶B薄膜。研究不同氧化、掺杂温度和时间对薄膜结构、电学性能的影响。结果表明 :氧化温度和时间对ZnO薄膜结构影响较大 ,液态源掺P可明显改善纳米ZnO薄膜的导电性能、结构特性和化学组分     

载人航天高可靠伺服技术

回顾了载人航天高可靠伺服技术的研制道路，介绍了用于载人航天火箭推力矢量控制中的新型三余度伺服机构的技术特点，对载人航天伺服技术的未来发展进行了分析和展望。     

Hybrid multilevel/multigrid potential preconditioner for fast finite element modeling

A robust hybrid multilevel/multigrid potential preconditioner is introduced for the fast and robust finite-element modeling of electromagnetic structures. The proposed preconditioning process combines the advantages of the hierarchical multilevel preconditioner and the nested multigrid potential preconditioner into a novel preconditioner with superior computational versatility. Numerical experiments from the application of the new preconditioner to the finite-element analysis of microwave devices demonstrate its superior numerical convergence and efficient memory usage.     

高效率窄线宽光纤激光器

本文报道了一种环形腔掺饵光纤激光器，得到了泵浦效率高达22.6%，输出线宽小于0.1nm的激光输出。     

Estimation of viscosity of ternary-metallic melts

A new model, based on Seetharaman’s viscosity model and Chou’s geometric-thermodynamic model, to predict the viscosity of ternary-metallic melts has been established. The viscosities of Ag-Au-Cu and Ag-Sn-Cu systems have been calculated with the present model, and the results are consistent with the experimental data. The viscosities of Au-Ni-Cu, Fe-Ni-Cu, Al-Sn-Cu, and In-Sn-Bi systems have also been predicted by the present model.     

带空间滤波器的激光聚焦系统对多模激光的聚焦

本文简单介绍了使用带空间滤波器的激光聚焦系统对多模激光进行聚焦的结果。     

化学镀镍合金在电子工业中的应用

对化学镀镍合金铁工艺和性能特性及其在电子工业中的应有委展现状作了评述。化学镀镍合金具有镀层均匀，适用基材广，结合力高，硬度高，优良的耐磨、耐蚀性，可焊性好和特殊的电磁性能等特性，在电子工业中获得了广泛的应用。文中着重介绍了化学镀镍合金在磁盘、电磁屏蔽、微电路、半导体、连接器及薄膜电阻上的应用情况。这些案例说明，合理应用化学镀镍合金技术，有利于提高电子元器件的质量，降低成本，促进技术进步。     

北京谱仪端盖簇射计数器工作气体的研究

为使北京谱仪端盖族射计数器更好地工作在自猝灭流光ＳＱＳ模式下，提高其能量分辨以及线性等指标，用Ａｒ，ＣＯ２，Ｌｓｏｂｕｔａｎｅ三元工作气体对探测器的工作性能进行了仔细研究，找出了一适合于主雇地数器的工作气体，此外，还研究了异丁的纯度对探测器性能的影响。     

Nonepitaxial Orientation in Sol–Gel Bismuth Titanate Films

Control over crystallographic orientation in ceramic thin films is important for highly anisotropic structures. Layered perovskites, like Bi₄Ti₃O₁₂, have interesting properties associated with their ferroelectric nature, which may be fully exploited only when films are highly textured. Textured films of this titanate were fabricated via a sol–gel technique without using epitaxial growth. Orientation in the film is confirmed by XRD and SEM, and supported by refractive index and dielectric measurements. In an attempt to explain the orienting effect, light scattering experiments were conducted to yield information about the molecular size, shape, and conformation of macromolecules as the sol–gel solution ages and condensation reactions proceed. These experiments clearly show an increase in the size of molecular clusters with time. We believe that it is the organization of these large clusters during spin coating, and the relationship of the backbone chemistry to the crystal structure of Bi₄Ti₃O₁₂, that are responsible for the observed orientation.