某型火箭弹半实物仿真系列方案设计－－海鹰仿真工作站的应用

主要介绍半实物仿真的意义、特点,YHSL仿真语言的特点,某型火箭弱是半实物仿真系统组成,以及为配合武器系统研制所设计的系列仿真6方案与某型火箭弹半实物住址系统软件结构及其设计。     

提取抽油井液位回音信号中液位值的方法

分析了抽油井液位回音曲线的特性,给出了检测曲线中特性脉冲的电路原理,介绍了根据统计规律计算声速和液位值的方法,该方法与计算机结合可以消除在测量中人为读数和干扰的影响,使得测量变得精确、方便、直接。此方法在实际中已得到了较好的应用。     

Comments on “A new robust control for a class of uncertaindiscrete-time systems”

A completed proof for a theorem on the robust controller design proposed in Wang and Ghosh (ibid. vol.43 (1997)) is presented in this paper     

微博转发预测算法评测系统的建立及性能比较

为解决微博转发行为预测问题,提出了一个基本的预测算法评测系统框架.该系统解决了原始微博数据的抓取和预处理,以及用户微博的转发和忽略行为的判定,微博和用户的特征提取等问题,为解决微博转发行为预测问题提供了技术基础.详细分析了现有文献和工作中的微博转发行为预测算法,阐述了它们的基本原理.通过定量实验分析了不同微博转发行为预测算法的在局部预测问题和全局预测问题方面的性能,并且从算法的原理等方面出发给出了定性的分析.     

The oxidation state of sulfur detected in Na2O-CaO-SiO2 float glass by X-ray absorption near edge structure spectra

The oxidation state of sulfur is detected in Na2O-CaO-SiO2 float glass by synchrotron radiation X-ray absorption near edge structure (XANES) spectra at the sulfur K edge. The measured spectra show the only presence of S6+ in the Na2O-CaO-SiO2 float glass and the oxidation state of sulfur do not change with the increase of glass depth. It is also found that, after the melt has gone through the molten tin bath, the S6+ is the dominant species, but S2- is also present on both surfaces. It is not certain whether cation bonds to S2- or not, because there are many cations dissolved in the melted tin which makes the spectrum complicated.     

Pressure-induced non-bulk superconductivity in Eu1.2Mo6(S1−x Se x )8

High-pressure study has been made both resistively and magnetically on Eu_1.2Mo₆(S_1–x Se _x )₈. Superconductivity was detected at a lower pressure in samples forx0 than forx=0 in spite of the larger unit cell volume of the former. The superconductivity observed remains non-bulk up to 20 kbar. The maximum onset temperature of the superconductivity transition decreases withx.On leave from the Physics Institute, Chinese Academy of Sciences, Peking, China.     

基于随机有限元的梁单元反应变异性分析

针对工程中由于不确定因素的影响而导致的结构反应的变异,利用随机有限元推导了在多个随机变量作用下梁单元结构反应变异的公式,以镗刀杆工作的位移变异为例,详细地介绍了其计算过程,并将其与解析法和Monte-Carlo法进行了对比,分析了各自的适用范围,为不确定性结构的可靠性分析奠定了基础。     

自然循环锅炉汽包寿命计算及影响因素分析

文中叙述了汽包寿命的计算方法，并针对各种运行工况计算出寿命消耗量，根据理论计算结果分析影响汽包寿命的主要因素，提出了增加汽包寿命的方法。     

自动化专业的学科属性及主干课程设置探讨

本文对自动化专业的学科属性、主干课程设置、教学改革建议等进行了讨论，提出了加强数学和工程背景基础，以适应未来社会需求等建议，对教师素质的提高也进行了探讨。