活笥银粉中微量铜铁的测定

提出用空气－乙炔火焰原子吸收光谱法来测定银锌电池活性银粉中的微量铜铁，并对测定条件和干扰因素进行了综合考虑，该测定方法具有灵敏度、精确度高，干扰小，选择性和重现性好等优点。测定样品微量铜铁含量的相对标准偏差均小于１.5%(n=8）。标准加入回收率均在（９７.00-102.00)%(n=5)范围内，完全适用于银锌电池活性银粉中微量铜铁含量的控制和样品系统分析，实际应用中取得了很好的效果。     

终端为“半球＋平面叶片”时进气道的RCS

首先分析了进气道等效圆波导中发动机等效“半球＋ 平面扇形金属叶片”终端的不连续性，根据电磁场互易定理和物理光学法（ Ｐ Ｏ） 计算了这种终端的反射系数；然后利用“传输模式叠加法”计算了进气道的雷达散截面（ Ｒ Ｃ Ｓ） 。计算结果与实验结果比较吻合，优于文献给出的计算结果。这种方法采用模式迭加求和，避免了普通模式法需进行大型矩阵计算以及对计算机内存的过高要求。     

一个基于多重推理的遥感图片解译专家系统

本文研究了在图象模式识别过程中引入人工智能的知识学习、知识表达和知识推理的理论和技术,设计并实现了一个应用于遥感图片解译的计算机视觉专家系统。 为使系统具有较高的智能化程度,本文提出了一种新的推理方法——多重推理法,它具有处理某些不完全知识和错误知识的能力,并且推理过程所运用的部分知识(规则)是从已知样本中自动归纳学习生成的。     

蓝色中性墨水的剖析

对蓝色中性墨水进行了系统分离 ,对分离组分进行了初步鉴定 ,确定了该墨水主要由溶剂水、颜料酞菁铜、非离子表面活性剂、保湿剂和增粘剂等组成 ,所测主要成分的质量分数为 99.7%。     

对直升机动力学的现状与发展的分析

对以旋翼动力学和飞行动力学为主体的直升机动力学研究进展回顾。主要讨论与飞行力学有关的旋翼气动力模型，旋翼结构动力学、气动弹性力学、飞行动力学模型与控制以及飞行操纵与品质等方面的进展，分析它们的现状，供有关直升机研究人员参考。     

航空发动机火焰筒矩形点焊换段修理技术研究

针对某型航空发动机火焰筒大修时出现的裂纹、烧伤及侵蚀问题,开展了火焰筒第4～6段换段修理工艺试验。通过分析火焰筒的结构,确定了用新段替换相应的故障段的方法对火焰筒进行修复。在拆分故障段时,尽量减小保留段壁厚的局部减薄量;在重新装配时,避免在原电阻焊点处再次焊接;通过采取以上工艺措施,实现了火焰筒的换段修理。同时进行了电阻焊焊接拉伸试验、撕破检查、金相组织检查等工艺验证试验。换段修理的火焰筒通过了发动机试车考核验证。换段工艺方法也可作为批生产过程中部分段制造有缺陷时的补救方案。     

Collisional profiles of ionized calcium perturbed by helium

The spectra of many cool DZ white dwarfs show extremely broad resonance lines of ionized calcium and magnesium in the optical and ultraviolet region. When the line center is strongly saturated, these wings may become a significant source of additional opacity in cool white dwarf atmospheres. The omission of this opacity results in systematic errors in the predicted flux distribution and hence in the effective temperatures and element abundances. In a continuation of Homeier et al. (2007) and Allard et al. (2012), where we presented absorption spectra of Na–He in cool white dwarfs, we extend this work to the Ca⁺–He system.     

LiHe spectra from brown dwarfs to helium clusters

The detection of Li I lines is the most decisive spectral indicator of substellarity for young brown dwarfs with masses below about 0.06 solar mass. Due to the weakness of the Li resonance lines, it is important to be able to model precisely both their core widths and their wing profiles. This allows an adequate prediction of the mass at which Li lines reappear in the spectra of brown dwarfs for a given age, or reversely an accurate determination of the age of a cluster. We report improved line profiles and the dependence of line width on temperature suitable for modeling substellar atmospheres that were determined from new LiHe molecular potential energies. Over a limited range of density and temperature, comparison with laboratory measurements was used to validate the potential energies which support the spectral line profile theory.     

4050润滑油前后闪点倒置现象的分析

针对油泵润滑系统存在的4050高温合成航空润滑油闪点前后倒置的现象．做了大量试验，在逐一排除干扰因素后，确定原因为现场操作不规范，使洗涤汽油混入润滑油中．导致前闪点大幅下降。     

Global characteristics of ionospheric electric fields and disturbances during the first hours of magnetic storms

The ionospheric plasma density can be significantly disturbed during magnetic storms. In the conventional scenario of ionospheric storms, the negative storm phases with plasma density decreases are caused by neutral composition changes, and the positive storm phases with plasma density increases are often related to atmospheric gravity waves. However, recent studies show that the global redistribution of the ionospheric plasma is dominated primarily by electric fields during the first hours of magnetic storms. In this paper, we present the measurements of ionospheric disturbances by the DMSP satellites and GPS network during the magnetic storm on 6 April 2000. The DMSP measurements include the F region ion velocity and density at the altitude of ∼840 km, and the GPS receiver network provides total electron content (TEC) measurements. The storm-time ionospheric disturbances show the following characteristics. The plasma density is deeply depleted in a latitudinal range of ∼20° over the equatorial region in the evening sector, and the depletions represent plasma bubbles. The ionospheric plasma density at middle latitudes (20°–40° magnetic latitudes) is significantly increased. The dayside TEC is increased simultaneously over a large latitudinal range. An enhanced TEC band forms in the afternoon sector, goes through the cusp region, and enters the polar cap. All the observed ionospheric disturbances occur within 1–5 h from the storm sudden commencement. The observations suggest that penetration electric fields play a major role in the rapid generation of equatorial plasma bubbles and the simultaneous increases of the dayside TEC within the first 2 h during the storm main phase. The ionospheric disturbances at later times may be caused by the combination of penetration electric fields and neutral wind dynamo process.