温度场中非线性弹性地基上矩形薄板的1/3次亚谐共振

为了研究温度场中非线性地基上矩形薄板受简谐激励的1/3次亚谐共振问题,应用弹性力学理论建立其动力学方程,应用Galerkin方法将其转化为非线性振动方程。利用非线性振动的多尺度分析方法求得系统1/3次亚谐共振的近似解,并进行数值计算。分析温度、地基系数、阻尼、几何参数、激励等对系统3次超谐共振的影响。得到了随参数变化响应曲线的变化规律。     

ERP沙盘对抗训练课程的原理与应用分析

从ERP的基本概念和应用原理入手,讨论ERP对于实现企业现代化的重要作用。分析ERP实训沙盘对抗训练课程在ERP教学中的应用方法和存在不足,探索出实践中对ERP沙盘对抗训练课程的改进方案。     

基于内驱力理论的强化学习模型实验探索

内驱力理论与强化学习模型的建立理论基础是一致的,文章使用量化的强化学习模型分析数据库用户检索行为中的内驱力特征。首先对Rotn-Erev模型、Bush—MostelIer模型和Borgers—Sarin模型进行结构剖析,然后简单介绍了衡量模型拟合度的准则和实验的基本要素,最后通过实验数据的模型拟合对用户的行为特征进行分析。     

明清时期盘石营变迁考论

文章以位于黔东大地上众多屯堡之一——盘石城为例,经详实的史料和实地调查,提出：明代修建于苗疆的各类屯堡,自然发挥了镇压少数民族的桥头堡的功能,但从盘石城的变迁来看,它们更多的是中华民族多元一体民族格局形成的重要见证。它们从一个纯军事的堡垒,逐渐演变为在各个时期发挥调节民族关系、规范民族交往秩序、见证民族文化的冲突与交流的重要作用。     

ICT research and school performance feedback: a perfect marriage?

An important step towards the successful integration of Information and Communication Technology (ICT) in schools is to facilitate their capacity to develop a school based ICT policy. However, one of the biggest challenges for schools is to gather data that could help shape such policy development. In this context, ICT researchers can be very useful as they can use the data gathered from their research projects to give feedback to schools. In this article, we present an electronic school performance feedback system (e‐SPFS) we developed for schools that participated in our survey research. This e‐SPFS illustrates how researchers can collaborate with practitioners; and how schools use data to examine their performance, their strengths and their weaknesses in shaping ICT policy decisions and practice. We appeal the ICT research community to carry out more research that is grounded in a school performance feedback cycle.     

Accuracy and precision of loadsol® insole force-sensors for the quantification of ground reaction force-based biomechanical running parameters

Force plates represent the “gold standard” in measuring running kinetics to predict performance or to identify the sources of running-related injuries. As these measurements are generally limited to laboratory analyses, wireless high-quality sensors for measuring in the field are needed. This work analysed the accuracy and precision of a new wireless insole forcesensor for quantifying running-related kinetic parameters. Vertical ground reaction force (GRF) was simultaneously measured with pit-mounted force plates (1?kHz) and loadsol^® sensors (100?Hz) under unshod forefoot and rearfoot running-step conditions. GRF data collections were repeated four times, each separated by 30 min treadmill running, to test influence of extended use. A repeated-measures ANOVA was used to identify differences between measurement devices. Additionally, mean bias and Bland–Altman limits of agreement (LoA) were calculated. We found a significant difference (p?® devices for these parameters. For these same parameters, the LoA analysis showed that 95% of all measurement differences between insole and force plate measurements were less than 12%, demonstrating high precision of the sensors. However, highly dynamic behaviour of GRF, such as force rate, is not yet sufficiently resolved by the insole devices, which is likely explained by the low sampling rate.     

不同信息条件下新型研发机构形成和作用机理研究——基于创新驱动发展的视角

以创新驱动发展为研究视角,界定承载研发创新功能的新型研发机构的内涵和形成动因,研究不同信息条件下新型研发机构的作用机理。通过建立数理分析模型发现,在完全信息条件下,通过组织间合作建立新型研发机构,各参与方能够获得经济收益和非经济收益,即使在没有经济收益的极端情况下,参与方也可以获得非经济收益,如学习能力、创新能力、管理能力的提升。在不完全信息条件下,创新研发风险越高,通过各方合作建立新型研发机构,获得的研发创新收益越大。并提出相关建议,以提高新型研发机构的创新能力。     

一种新型板式换热器在轻工行业的应用

介绍了一种能利用低压二次蒸汽的新型板式换热器在味精厂的应用。该板式换热器以味精厂结晶罐的二次蒸汽作加热介质,冷水被加热后作锅炉入炉水之用。一方面充分利用了二次蒸汽的冷凝潜热,节省了加热入炉水的热能（节省了燃煤）,同时又减少了二次蒸汽直接用水冷凝后排放对环境产生的热污染,节能减排效果十分显著。     

一个可能最终确定以太存在与否的实验

分析了“光行差”现象、“光速不变”现象、“洛奇钢盘实验”,认为地球有可能拖曳以太。论证了在绕地轨道上进行迈克尔逊一莫雷实验可以最终确定是否存在以太,并设计了相应的设备。     

独玉的成矿大地构造背景分析

独玉矿床位于华北板块和华南板块之间的秦岭造山带中段，其成因与秦岭造山带的构造演化密切相关。利用岩石化学方法判别及ESCORT专家系统分析可知，独山岩体属于发育在秦岭洋洋壳上的岛弧火山岩，它为独玉的形成准备了物质条件。随着秦岭造山带的逐步形成，该岩体在断裂、挤压作用下被抬升至地表，从而形成孤立的岩体——独山岩体。