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Simulation-based Graphic Method for Dynamic System Modeling
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作者 Qinyao Liu Haiyang Zhang +1 位作者 Jia wang xuchen wang 《计算机教育》 2023年第12期48-54,共7页
The first step for engineering students to understand the practical system is to describe the system,which means to establish the mathematic model for the considered system.However,traditional mathematical modeling te... The first step for engineering students to understand the practical system is to describe the system,which means to establish the mathematic model for the considered system.However,traditional mathematical modeling techniques are not readily assimilated by students,because the traditional modeling needs to obey the complicated physical laws for different engineering areas and requires a highly iterative process.In this paper,the simulation-based graphic modeling method is introduced to help students model the system and improve their performance in engineering education.The results from the questionnaire indicate that the simulation-based graphic method can help students to do the modeling of the system and improve their performance compared to the traditional ways. 展开更多
关键词 Software simulation Dynamic system Mathematical modeling
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An Interactive Online Platform for Algorithms Teaching 被引量:1
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作者 Wenhao Zhou Lin Liu +3 位作者 Qiufeng wang Yusen Wu xuchen wang Jia wang 《计算机教育》 2022年第12期130-136,共7页
Learning programming has become an important part of education.However,most students have extreme difficulty learning programming and complex algorithms.This is because programming has a hierarchical logic.Solving com... Learning programming has become an important part of education.However,most students have extreme difficulty learning programming and complex algorithms.This is because programming has a hierarchical logic.Solving complex problems requires students to develop skills in decomposing problems.To this end,this paper describes an effective method to develop an online platform for teaching complex algorithms. 展开更多
关键词 Cloud application Interaction learning Algorithm teaching
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Fluorescence characterization and microbial degradation of dissolved organic matter leached from salt marsh plants in the Yellow River Delta 被引量:1
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作者 Tao Zhang Zhihua Feng +4 位作者 Chunle Luo Yixin Sun Jinzhen Li Juntian Xu xuchen wang 《Journal of Plant Ecology》 SCIE CSCD 2020年第5期525-537,共13页
盐沼植被是沿海水体中溶解有机物(Dissolved Organic Matter,DOM)的重要贡献者。然而,不同盐沼植物释放DOM的动力学特征尚缺乏系统研究和比较。黄河三角洲湿地是中国东海岸面积最大,保护最完善的沿海生态系统之一。本论文研究了2016年1... 盐沼植被是沿海水体中溶解有机物(Dissolved Organic Matter,DOM)的重要贡献者。然而,不同盐沼植物释放DOM的动力学特征尚缺乏系统研究和比较。黄河三角洲湿地是中国东海岸面积最大,保护最完善的沿海生态系统之一。本论文研究了2016年10月从黄河三角洲(Yellow River Delta,YRD)盐沼中采集的三种常见沼泽植物(芦苇(Phragmites australis),碱蓬(Suaeda salsa)和獐茅(Aeluropus littoralis)的DOM释放过程。通过测定溶解有机碳(Dissolved Organic Carbon,DOC)和溶解氮(Dissolved Nitrogen,DN)发现,植物叶片释放的DOM浓度远高于其根和茎。在27天的培养期内,平均有15%的生物碳和30%的生物氮以DOC和DN的形式通过植物叶片释放。从植物中释放的DOM非常不稳定,在27天的培养期内,细菌共消耗了92.4%-98.1%的DOC和88.0%-94.6%的DN。植物释放DOM的荧光特性表明,发色溶解的有机物(Chromophoric Dissolved Organic Matter,CDOM)是DOM的主要组分,而类蛋白组分是植物释放CDOM的主要组分。细菌的降解作用改变了DOM的荧光性质和化学组成。上述的室内研究结果得到了实地调查的充分支撑,表明在深秋时期黄河口湿地有大量DOM溢出。本研究结果表明,盐沼植物释放的DOM是沼泽和沿海水域DOC和DN的重要来源,而且易降解DOC和DN为黄河口湿地和邻近沿海水域中的微生物群落提供了重要的食物来源。 展开更多
关键词 溶解有机物 盐沼植物 黄河三角洲 植物生物质浸出 微生物降解
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