大学数学网络平台建设的创新与实践     

李路  江开忠  胡细  周雷 《教育教学论坛》2015,(32)

本文分析了信息化社会背景下大学数学教学遇到的生源差异、经费投入、教师不适应、学生习题、成绩评定等瓶颈问题,详细介绍了我校大学数学网络平台,包括在线答疑平台、在线测试平台和自主学习平台的主要建设内容及平台运行的情况。基于我校的网络平台的实践情况,分析了网络平台的作用和潜在的效果,为我校信息化教学改革做出了积极地探索。  相似文献   

MANET在空间复用随机模型下的平均洪泛距离研究     

胡细  王汉兴  赵飞 《上海大学学报(英文版)》2007,11(4):336-339

The flooding distance is an important parameter in the design and evaluation of a routing protocol,which is related not only to the delay time in the route discovery,but also to the stability and reliability of the route.In this paper, the average flooding distance (AFD) for a mobile ad hoc network (MANET) in a random graph model was given based on the dynamic source routing (DSR) protocol.The influence of spatial reuse on the AFD was also studied.Compared with that in the model without the spatial reuse,the AFD in the model with the spatial reuse has much smaller value,when the connetivity probability between nodes in the network is small and when the number of reused times is large.This means that the route discovery with the spatial reuse is much more effective.  相似文献   

青蛙心室中有几种血液?     

胡细九 《生物学教学》1988,(1)

答:青蛙属于两栖纲,这是脊椎动物由水生向陆生的一个过渡类群,属低等脊椎动物,在结构上还不够完善,心脏只有两心房和一心室(两栖动物的共同特征)。因此,在青蛙的  相似文献