站内移频电码化存在问题的探讨

本文针对25Hz相敏轨道电路叠加移频信号在向机车发送信息方面存在的问题，进行现场调查分析，并采取相应技术措施，确保地面发送信息的正确性，对行车安全起到了积极的作用。     

The impact of the French policy mix on business R&D: How geography matters

Based on a spatial extension of an R&D investment model, this paper measures the macroeconomic impact of the French R&D policy mix on business R&D using regional data. Our measure takes into account not only the direct effect of policies but also indirect effects generated by the existence of spatial interaction between regions. Using a unique database containing information on the levels of various R&D policy instruments received by firms in French NUTS3 regions over the period 2001–2011, our estimates of a spatial Durbin model with structural breaks and fixed effects reveal the existence of a negative spatial dependence among R&D investments in regions. In this context, while a-spatial estimates would conclude that all instruments have a crowding-in effect, we show that national subsidies are the only instrument that is able to generate significant crowding-in effects. On the contrary, it seems that the design, size and spatial allocation of funds from the other instruments (tax credits, local subsidies, European subsidies) lead them to act (in the French context) as beggar-thy-neighbor policies.     

对YB25型包装机铝箔纸折弧辊子轴的改进

针对YB25型软盒包装机铝箔纸折弧辊磨损后更换困难,提出对折弧辊轴的改进方案,通过改进达到提高设备运行稳定性及方便调整的目的.     

从第25届亚洲男篮锦标赛看中国男篮的现状

本文通过文献资料法、录像观察法、数理统计法对第25届亚洲男篮锦标赛中国男篮的技术进行分析,解析中国男篮在本届锦标赛的表现,找出中国男篮本届亚锦赛所出现的问题,为北京奥运后中国男篮的发展和提高提供理论基础和数据支撑。     

ZD25TCR柴油机电控系统功能介绍

在介绍柴油机电控技术产生和发展的基础上,详述了目前国内被广泛应用的ZD25TCR柴油机式电控系统的基础控制和故障诊断功能。     

浅谈PEKE与PEKEv1.25密码系统

根据PEKE(随机加密密匙交换)密码系统的原理,提出了增强PEKEv1.25的基本思想.PEKEv1.25在PEKE原有输出的基础上执行了哈希运算,目的是提高密码系统安全性,拓宽使用范围.     

Knowledge to money: Assessing the business performance effects of publicly-funded R&D grants

UK Research Councils (UKRCs) spend around £3bn pa supporting R&D and innovation. We provide a comprehensive assessment of these grants on the performance of participating UK firms, using data on all projects funded by UKRCs over the 2004–2016 period and applying a propensity score matching approach. We exploit the richness of the data available in the Gateway to Research database by investigating the heterogeneous effect of these projects across several novel directions which have not been explored before. We find a positive effect on the employment and turnover growth of participating firms, both in the short and in the medium term. Exploring impacts across different types of firms we find stronger performance impacts for firms in R&D intensive industries and for smaller and less productive firms. We also consider how impacts vary depending on the characteristics of the funded research projects in terms of partners characteristics, receipt of other research grants and grant value. Finally, we focus on the different sources of grants, analysing in particular the evolution in the funding strategy of Innovate UK. Our results have implications for the extent and targeting of future Research Council funding both in the UK and elsewhere.     

Controllability of Volterra-Fredholm type systems in Banach spaces

We show the results in Chalishajar [Controllability of mixed Volterra-Fredholm-type integro-differential systems in Banach space, J. Franklin Inst. 344(1) (2007) 12-21] and Chang and Chalishajar [Controllability of mixed Volterra-Fredholm type integro-differential systems in Banach space, J. Franklin Inst., doi:10.1016/j.jfranklin.2008.02.002] are only valid for ordinary differential control systems. As a result the examples provided cannot be recovered as applications of the abstract results.     

PLC在SCX25型擦洗机及脱泥装置自动监控中的应用

为了实现对SCX25型擦洗机及脱泥装置的自动化改进,建立了一套高效、直观、自动化的监测控制系统．该系统以OMRONC200HPLC为处理核心,微机为上位机,能实现对设备的实时监测、动态显示、自动顺序控制等功能。