机载航电系统射频信道健康表征及影响评估

提出了基于失效模式影响及危害性分析（FMECA）、故障树分析（FTA）和历史案例的 健康表征参数选取原则和方法,探讨了基于隐马尔可夫模型（HMM）和贝叶斯的健康表征方 法及其应用。结合机载航电系统综合化射频信道架构,通过建立的模型对射频信道的健康影 响进行了初步分析,得到了射频信道健康表征的优先参量。基于射频信道的健康表征参量和 影响评估方法的研究对促进开展先进战斗机健康管理技术研究具有重要意义。     

基于FTV的改进深度估计算法

深度估计是任意视点电视(Free View Television,FTV)系统的关键技术。为提高深 度边缘的深度估计准确度,并解决视频序列中不同帧间同一深度物体深度估计值不一致问题 ,提出一种在深度图的时间一致性保持算法,以前一帧的深度图与当前视图的运动信息为约 束条件估计当前帧的深度,使得相邻帧的深度图在时间上保持一致。     

地空超短波话音通信网中的越区切换及其关键技术

地空超短波话音通信网是实施航空管制与对空指挥通信的重要基础设施,而越区切 换是其实现连续、不间断地空通信中的重要一环。介绍了地空超短波话音通信网的构成和越 区切换过程,分析比较了地空超短波话音通信网与陆地移动通信系统和数据链系统在越区切 换上的区别,提出并详细阐述了地空超短波话音通信网越区切换的关键技术,展望了地空超 短波话音通信网越区切换的发展方向。     

Combining Keynes and Schumpeter. Ingvar Svennilson’s contribution to the Swedish growth school and modern economics

In a study of European growth in the interwar period, the Swedish economist Ingvar Svennilson integrated a Keynesian theory of demand-led cumulative growth with a Schumpeterian analysis of transformation. Today, Svennilson is seen, together with the Schumpeterian economists Johan Åkerman and Erik Dahmén, as members of a unique Swedish growth school. A combination of Keynes and Schumpeter with Svennilson as a mediator has been facilitated by neo-Schumpeterian theories of demand-led innovations. But it has been obstructed by a hypothesis in the Schumpeterian tradition that productivity growth is stimulated by low aggregate demand and by Svennilsons strong commitment to Verdoorns Law which actually is Svennilsons Law. However, Svennilsons analyses of the importance of short-run imbalances for economic growth and the existence of imperfect capital markets discriminating progressive new firms have direct equivalences in modern macroeconomics. Svennilsons main contributions to economics of today are his syntheses between macroeconomic and structural analysis, short and long run theoretical perspectives and, more basically, between theoretical and empirical research.JEL Classification: B25, E32, L6, N14, O11, O14, O31, O4A Swedish version of the paper was presented at the 7th Nordic Conference on the History of Economic Thoughts in Molde (Norway), May 2-4, 2003 and at the Ratio institute (Stockholm), May 8, 2003. I thank participants, Rolf Henriksson and two anonymous referees for valuable comments.     

Ownership balance,supervisory efficiency of independent directors and the quality of management earnings forecasts

In the Chinese securities market, with its characteristics of influence through personal relationships(Guanxi) and underdeveloped standards of law and enforceme...