期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
日光温室连阴天危害游程模拟分析 被引量:5
1
作者 陈景玲 杨晓光 王谦 《中国农业大学学报》 CAS CSCD 北大核心 1998年第3期48-52,共5页
应用游程理论分析了日光温室连阴天危害发生的规律。对游程理论的模拟方法应用于日照时数序列表示的连阴天游程特征模拟的可行性进行了检验,发现;①冬季连阴天发生次数和连阴天长度期望值理论模拟结果与实际结果拟合良好,连阴天期间... 应用游程理论分析了日光温室连阴天危害发生的规律。对游程理论的模拟方法应用于日照时数序列表示的连阴天游程特征模拟的可行性进行了检验,发现;①冬季连阴天发生次数和连阴天长度期望值理论模拟结果与实际结果拟合良好,连阴天期间内日照时数缺乏量期望值须在理论模拟上加以修正;②连阴天长度的概率分布符合D.M.Hershfitld的几何分布。以河南省为例给出了连阴天长度的概率分布和各游程特征量的地域分布规律;确定了河南省日光温室发展的最佳地带;并在此基础上提出了生产建议。 展开更多
关键词 日光温室 连阴天 游程模拟 危害 气象灾害 农业
下载PDF
Groundwater Flow Modelling of Galma Basin, Nigeria: Using Finite Element Method
2
作者 I.O. Olaniyan J.C. Agunwamba J.O. Ademiluyi 《Journal of Environmental Science and Engineering》 2011年第3期247-252,共6页
The groundwater flow characteristics of the Galma River Basin were simulated numerically by using the finite element method. The two-dimensional partial differential equation governing transient flow in an unconfined ... The groundwater flow characteristics of the Galma River Basin were simulated numerically by using the finite element method. The two-dimensional partial differential equation governing transient flow in an unconfined aquifer was modified to incorporate the effect of precipitation as a measurable source as it affects groundwater flow, such that for a given amount of precipitation over the basin, the flow of groundwater can be predicted at any point in the basin. With appropriate initial and boundary conditions, the modified equation was solved and the solution programmed for computer run. After calibration and verification, the borehole hydraulic data for the basin was used to predict flow due to groundwater hydraulic heads for 20 years. Findings revealed that there is a direct correlation of 0.79 and a strong linear relationship between simulated and observed hydraulic heads, and that data availability and choice of appropriate initial and boundary conditions are significant for good numerical modelling results. The contour plot of the hydraulic heads showed variation of heads from higher values at the upstream to lower values downstream, and groundwater flow follows the natural topography of the land from the upstream end of the basin towards the main streams and Galma River. 展开更多
关键词 Groundwater flow river basin PRECIPITATION finite element hydraulic head.
下载PDF
Simulation Games As Educational Learning Method in Engineering Careers
3
作者 Leonardo Adan Douglas Costucica 《Journal of Mechanics Engineering and Automation》 2015年第4期251-256,共6页
The challenges of today's world require college students have different skills and know how to apply the knowledge acquired to solve new situations. The traditional mode of teaching with lectures, still present in ma... The challenges of today's world require college students have different skills and know how to apply the knowledge acquired to solve new situations. The traditional mode of teaching with lectures, still present in many subjects of the engineering, seems to favor the development of the necessary skills, as active use of knowledge required [ 1 ]. However, they are using simulation games as an educational method in many universities in the world for the advantages they present for learning and the development of various skills, to simulate specific situations of professional activity [2]. This paper presents some background and requirements that games must meet educational purposes and propose their use in subjects related to economics, management and organization of production engineering programs where you can teach and learn from building products with simple items like cardboard paper on the theory of constructionism to build a product where people are building theories and knowledge in the mind [3]. The use of games is not widespread in universities in Argentina, however you can generate more motivating learning situations as it leaves the board becoming less abstract and more concrete learning. Classroom climate changes as students take a more participatory role and the teacher intervenes as a guide or facilitator of learning. This work could motivate teachers and researchers to promote their use in teaching and in future research to evaluate the potential of its use as a learning tool. 展开更多
关键词 SIMULATION GAME TEACHING LEARNING educational method.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部