激波作用下粉尘卷扬,点火与燃烧的数值研究

根据本文给出的守恒方程和计算方法，对激波与沉积可燃粉尘的相互作用进行了数值研究，讨论了激波作用下的颗粒的上扬、点火与燃烧的基本特征以及波后燃烧粉尘云的内部结构。     

FUZZY PETRI NET FOR FAULT DIAGNOSIS

ＦＵＺＺＹＰＥＴＲＩＮＥＴＦＯＲＦＡＵＬＴＤＩＡＧＮＯＳＩＳＷｕｙａｎｆａｎｇ；ＷｅｉＺｈｏｎｇｘｉｎ．（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＮａｎｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＡｅｒｏｎａｕｔｉｃｓａｎｄＡｓｔｒｏ...     

An interacting multiple model approach for target tracking withglint noise

The application of the interacting multiple model (IMM) estimation approach to the problem of target tracking when the measurements are perturbed by glint noise is considered. The IMM is a very effective approach when the system has discrete uncertainties in the dynamic or measurement model as well as continuous uncertainties. It is shown that this method performs better than the “score function” method. It is also shown that the IMM method performs robustly when the exact prior information of the glint noise is not available     

飞机发电机双余度调压器设计分析

本文对为飞机采用交流——直流——交流(AC—DC—AC)方案的变速恒频(VSCF)电源系统设计的一种双余度调压器进行分析和介绍。为了提高VSCF 电源系统的控制可靠性,完善系统性能,提出了交流和直流双通道控制方案。分析和实验结果证明该调压器各项性能达到了设计要求。     

‘Good’ events selection efficiency of the scintillation time-of-flight system of the Gamma-1 telescope in the 30–300 MeV energy range

The scintillation time-of-flight triggering system of the Gamma-1 gamma-ray telescope provides for both the time-of-flight discrimination and the pulse height discrimination of the secondary particles. The paper gives some experimental results for energy dependence of the instrument efficiency in 30–300 MeV energy range for different trigger logics.     

An exact expression for resolution cell area in special case ofbistatic radar systems

An exact expression for the bistatic resolution-cell area (A _B) is developed for the special case in which either the transmit or receive antenna has a broad azimuth beamwidth or is omnidirectional. Quantitative examples are presented to illustrate the variation of A_B with location. A comparison is made with the performance of a commonly used approximation formula     

X-ray emission from Be star/X-ray binaries

Observations of X-ray emission from Be star/X-ray binaries are reviewed. Some optical characteristics of these binaries are also presented. Theoretical aspects pertaining to the X-ray emissions are given.