基于RMA2模型雨污排放沟渠的水动力特性分析

为了将合流制排放的污水中颗粒污染物沉积在特定区域,利用RMA2模型分析排放沟渠形态改造前后的流场变化,模拟结果看通过修整和改造后沟渠内流速降低,有利于颗粒物沉降,改造方案切实可行。     

光源对TiO2纳米粉体催化效果的影响

以钛酸丁酯为前躯体,采用溶胶-凝胶法制备TiO2粉体,并通过TEM和XRD分析方法对其结构性能进行表征.检测结果表明:TiO2粉体由5-10nm的球形颗粒组成,晶型为锐钛矿型.通过在不同光源下催化降解水杨酸溶液,对其光催化活性及影响因素进行了分析.实验结果表明:紫外光下此TiO2纳米粉体的光催化活性较高.     

C语言程序设计课程教学方法探讨

为了培养合格的高职人才,辽宁信息职业技术学院在C语言程序设计课程教学中,采用项目式和分组教学的模式,理论与实践相结合,加强计算机基础知识的教学,提高学生的编程能力,培养学生的团队合作精神和沟通能力,促进了学生全面素质的提高。     

Origin法拟合Ni2FeAl超顺磁性的研究

Heusler合金Ni2FeAl甩带样品具有超顺磁性,铁磁相和顺磁相在高于Blocking温度时共存。本文运用M.Pissas等人对铁磁和顺磁相的研究方法,对Ni2FeAl的超顺磁现象进行Origin拟合研究,表明随着温度的增加系数α不断增大,铁磁在向顺磁转变,但仍处在超顺磁范围内。     

干涉条纹计数电路设计及应用

设计了一种基于单片机的迈克耳孙干涉条纹计数电路,该电路具有清零和选择明、暗条纹计数的功能,能对"冒出"或"缩进"的干涉条纹进行自动计数,结构简单、操作灵活、成本低,应用于迈克耳孙干涉仪测波长实验,测量波长误差在3%以内。     

宋代阿者、罗殿、毗那三个彝族藩国的谱系与分布

根据宋代文献的记录,宋代的今贵州西北、中、西南三部地区,出现了阿者、罗殿和毗那三个并立的"化外"彝族藩国,因宋代无力实行有效"羁縻",给它们提供了比较宽松便利的条件,这些藩国终于在邕州横山寨(今广西田东县)的市马浮出水面。根据彝文文献记载,这三部彝族都有较为完整的父子连名谱记录,分布的地盘到今天还能考证。     

利用DEA对科研机构规模效益的分析

利润最大化是生产经营性企业的追求目标。对于社会公共服务部门、科研单位等非赢利性机构而言,虽然利润最大化不是其追求目标,但由于规模效益问题涉及资源配置,资源使用效率等问题,所以至关重要。数据包络分析方法(DEA)是基于经济学概念上发展起来的非参数定量分析方法,可以提供决策单元规模效益变化的信息,因此可以用来对非赢利性公共部门或科研机构的分析。我们改进了标准DEA模型以克服其某些局限性,在实际应用中又与评估者的评估策略和价值导向相结合。作为应用实例,我们对某科研机构的34个研究组的规模效益进行了分析和探讨。     

A tale of two literatures: Transaction costs and property rights in innovation outsourcing

This paper investigates the relative importance of property rights and transactions cost factors in driving the decision of firms to outsource innovation. Using data for over 8000 firms from the UK Community Innovation Survey, we find that property right factors dominate over transaction cost factors. Transaction cost variables are more important for process innovation, while property rights variables are more significant for firms involved in product innovation. In addition, we find that firms involved in process innovation have a higher probability of outsourcing innovation than firms involved in product innovation.     

Stability and dissipative analysis for a class of stochastic system with time-delay

This paper deals with the stability and dissipative problem of a class of stochastic hybrid system. The system under study involves Markovian jump, impulsive effects and time delay, which are often encountered in practice and are the sources of instability. Our attention is focused on analysis of whether the stochastic hybrid system with time-delay is stochastically asymptotically stable and strictly (Q, S, R) dissipative. By introducing an extra artificial time instance, the equivalent system is obtained and the sufficient conditions are derived by using linear matrix inequality (LMI) techniques. The main results of this paper unify the existing results on H_∞ control.     

The role of ICT knowledge flows for international market share dynamics

This paper investigates the role of Information and Communication Technologies (ICTs) related knowledge flows for international market shares. Using bibliometric data on scientific publications, we analyse the relationship between the strength of 14 OECD countries in four ICT-related scientific fields and the ability of those countries to maintain and acquire export market shares in the OECD market, across 16 manufacturing industries over the period 1981-2003. We find that domestic and foreign ICT-related scientific knowledge flows have a positive and significant impact on export market shares in ICT industries, while only domestic flows positively affect export shares in non-ICT industries. We also find that small open economies benefit more than other countries from foreign knowledge flows both in ICT and in non-ICT industries.