基于Web3D防汛信息服务系统构建技术研究

立足于防汛工作实际需求，提出了基于Web3D防汛信息服务系统的构建技术，并利用这些技术研发了辽宁省防汛信息服务系统。系统试运行结果表明，上述技术先进实用，为防汛工作提供了信息服务和技术支撑。     

Dynamic Modeling and Analysis for a Humanoid Robot

To resolve the kinematics modeling and dynamics modeling of a humanoid robot with complicated machine, a modeling method based on the conventional mechanism combined with neural network is presented. First the kinematics formulas are deduced by analyzing its geometry structure. Second, the dynamics models are built up with Lagrange-Euler method combined with the define of interactive force among all parts of the humanoid robot. The interactive force is realized by neural network method. Finally, the true robot parameters are applied to the model. The simulation results show the validity of the modeling. So, the method is practical and available.     

浅议生命环境观视角下的课堂教学呈现方式的转变

随着信息技术和教育技术在学校教育教学中的推广和应用,应用于教学中的各种技术手段正在日益丰富,教学方式也随之发生着深刻变化,交互式呈现方式迅速崛起并在课堂教学中的应用。交互式呈现方式改变了呆板的板书、投影等只能单向呈现缺乏沟通和交流的现状,实现了信息技术与课堂教学的完美结合,本文从"媒体+教学"的理论框架出发,反思多媒体课堂教学模式,进而以生命课堂的视角,形成对多媒体课堂教学模式新的思考。     

Interactive effects of ammonium application rates and temperature on nitrous oxide emission from tropical agricultural soil

Emissions of nitrous oxide (N₂O), a potent greenhouse gas, from agricultural soil have been recognized to be affected by nitrogen (N) application and temperature. Most of the previous studies were carried out to determine effects of temperature on N₂O emissions at a fixed N application rate or those of N application rates at a specific temperature. Knowledge about the effects of different ammonium (NH₄⁺) application rates and temperatures on N₂O emissions from tropical agricultural soil and their interactions is limited. Five grams of air-dried sandy loam soil, collected in Central Vietnam, were adjusted to 0, 400, 800 and 1200 mg NH₄-N kg^–1 soil (abbreviated as 0 N, 400 N, 800 N and 1200 N, respectively) at 60% water holding capacity were aerobically incubated at 20°C, 25°C, 30°C or 35°C for 28 days. Mineral N contents and N₂O emission rates were determined on days 1, 3, 5, 7, 14, 21 and 28. Cumulative N₂O emissions for 28 days increased with increasing NH₄⁺ application rates from 0 to 800 mg N kg^–1 and then declined to 1200 mg N kg^–1. Cumulative N₂O emissions increased in the order of 35°C, 20°C, 30°C and 25°C. This lowest emission at 35°C occurred because N₂O production was derived only from autotrophic nitrification while other N₂O production processes, e.g., nitrifier denitrification and coupled nitrification-denitrification occurred at lower temperatures. More specifically, cumulative N₂O emissions peaked at 800 N and 25°C, and the lowest emissions occurred at 1200 N and 35°C. In conclusion, N₂O emissions were not exponentially correlated with NH₄⁺ application rates or temperatures. Higher NH₄⁺ application rates at higher temperatures suppressed N₂O emissions.     

基于EEMD视角的农业保险与农业信贷互动绩效——以山东省为例

为研究农业保险与农业信贷之间是否具有协同关系,采用EEMD分析方法,对山东省1982—2015年农业保险保费收入和农业贷款余额年度数据进行研究,结果表明:两者均由高频分量、低频分量和趋势项构成。上述结构分量的格兰杰因果检验表明,农业保险和农业贷款高频分量之间在1%的水平上互为因果关系;而低频分量间存在不对称的传导方式,即在1%的水平上农业贷款到农业保险存在单向因果关系,在10%的水平上两者互为因果关系。     

新媒体传播视角下《万万没想到》营销策略研究

网络自制剧《万万没想到》在2014年的点击率累计第一季已经过亿,其人气一直居高不下。本文在新媒体的视角下,从内容生产、广告创新、受众互动三个方面分析网络自制剧《万万没想到》的营销策略。     

小议大学英语网络课程设计中的问题及对策

网络课程在大学英语教学中的应用打破了传统教学方式的局限,为教学拓展了广阔的发展空间。然而目前的大学英语网络课程存在缺乏系统性、互动方式失衡、缺乏反馈和监督等问题,通过设置合理导学环节、实现多元交互方式以及加强课程反馈和监督等方式可以有效解决这些问题。     

农业高职动物解剖互动式教学改革与实践

按照动物解剖教学规律,结合学生的心理、年龄、学习等特点,引入互动式教学,能充分调动学生的学习积极性,培养学生的学生兴趣,从而提高动物解剖教学的质量。     

GPS-RTK结合手机奥维互动地图在农田土地平整测量中的应用

结合河北省森泽县某测区实践,探讨了利用载波相位实时动态差分定位(GPS-RTK)进行土地平整测量的便捷性,以及用手机奥维互动地图来代替传统的"草图+点号"法的可行性,二者结合,极大地提高了土地平整测量的外业工作效率。     

考虑共同作用的带桩承台梁结构分析

以分层地基模型并采用有限元－有限层的计算方法为基础建立起桩－土－承台梁的共同作用方程，通过计算程序分析了承台梁在其下不均匀土质、桩身差异、基桩刚度等因素影响下的受力状况，得到了一些有益的结论。