2019年12月,经济合作与发展组织(Organization for Economic Cooperation and Development,简称OECD)公布了2018年最新国际学生评估项目(Programme for International Student Assessment,简称PISA)成绩。中国(北京、上海、江苏、浙江)...2019年12月,经济合作与发展组织(Organization for Economic Cooperation and Development,简称OECD)公布了2018年最新国际学生评估项目(Programme for International Student Assessment,简称PISA)成绩。中国(北京、上海、江苏、浙江)在阅读素养、数学素养、科学素养三项测试中均位列世界第一。在看到中国基础教育成就的同时,我们也应关注大规模评估(Large Scale Assessment,简称LSA)的种种作用与影响。2018年10月华东师范大学举办首届教育先锋论坛,论坛的主题是"大规模评估:问题与前景"。与会者包括哈佛大学(Harvard University)的理查德·埃尔莫尔(Richard Elmore)教授、康涅狄格大学(University of Connecticut)的罗纳德·贝格托(Ronald Beghetto)教授、普渡大学(Purdue University)的张华华教授、华东师范大学的袁振国教授以及堪萨斯大学(University of Kansas)的赵勇教授等。论坛的目的不是讨论LSA的技术问题或对其作出评价,而是讨论LSA的使用(或滥用)、LSA在教育中的作用,以及从哲学层面讨论在教育领域中用LSA进行评估的可能性与局限性。换言之,我们更感兴趣的是讨论LSA不能做什么,而不是它能做什么。我们更关注LSA对教育的负面影响,而不是积极影响。展开更多
This study promotes application of Augmented Reality （AR）, whose properties can handle multiple sensory that heightens its quality of performances, affections in first time users, and introduces the possibility and ...This study promotes application of Augmented Reality （AR）, whose properties can handle multiple sensory that heightens its quality of performances, affections in first time users, and introduces the possibility and guideline in mass production through the development of＂Augmented Reality Band＂, a gadget based on AR system that allows users to interact with virtual music instruments to make music through the system that analyze printed marker on the shirt. The system is developed by using FLAR Toolkit and made accessible via AR band website. The user can run the system online from anywhere by wearing the shirt printed with embedded musical instruments AR code. In order to promote AR Band performances, the authors assessed the quality of the system from technical professionals. It has been found out that the quality level is very high （4.64/5.00） and the user satisfaction evaluated by sample group has been found in a satisfied level （4.22/5.00）. In summary, AR Band has proven its performances to enhance user satisfaction and its further development and adaptation is under discussion and suggestion section provided at the end.展开更多
A laboratory-based work was conducted on development, biometry （cyst diameter, hatching efficiency and hatching percentage） and survival rate of Artemia franciscana at 35 ppt using natural brine water under constant...A laboratory-based work was conducted on development, biometry （cyst diameter, hatching efficiency and hatching percentage） and survival rate of Artemia franciscana at 35 ppt using natural brine water under constant aeration facilities. The experiment was carried out for both chorionic and decapsulated cysts. There was a significant increase in hatching output of the decapsulated cysts than the chorionic cysts. The survival rate was counted only for the chorionic cysts because nauplii hatched from decapsulated cysts died after four days of incubation before reaching the adult stage. Untill now the Artemia cysts are imported from abroad. Though the prospect of mass production of Artemia in Bangladesh is feasible but there needs to be more studies done.展开更多
In this article, we propose a parameter vertex method to determine the upper and lower bounds of the dynamic response of structures with interval parameters, which can be regarded as an extension of the matrix vertex ...In this article, we propose a parameter vertex method to determine the upper and lower bounds of the dynamic response of structures with interval parameters, which can be regarded as an extension of the matrix vertex method proposed by Qiu and Wang. The matrix vertex method requires considerable computation time and encounters the dependency problem in practice,thereby limiting its application in engineering. The proposed parameter vertex method can avoid the dependency problem, and the number of possible vertex combinations in the proposed method is significantly less than that in the matrix vertex method.The parameter vertex method requires that each matrix element in the dynamic differential equation is monotonic with respect to the uncertain parameter, and that the dynamic response reaches its extreme value when the uncertain parameter is at its endpoint.To further reduce the runtime, both vertical and transversal parallel algorithms are introduced and integrated into the parameter vertex method to improve its computational efficiency. Two numerical examples are presented to demonstrate the proposed method combined with both parallel algorithms. The performances of the two parallel algorithms are thoroughly studied. The parameter vertex method combined with parallel algorithm can be used for large-scale computing.展开更多
文摘2019年12月,经济合作与发展组织(Organization for Economic Cooperation and Development,简称OECD)公布了2018年最新国际学生评估项目(Programme for International Student Assessment,简称PISA)成绩。中国(北京、上海、江苏、浙江)在阅读素养、数学素养、科学素养三项测试中均位列世界第一。在看到中国基础教育成就的同时,我们也应关注大规模评估(Large Scale Assessment,简称LSA)的种种作用与影响。2018年10月华东师范大学举办首届教育先锋论坛,论坛的主题是"大规模评估:问题与前景"。与会者包括哈佛大学(Harvard University)的理查德·埃尔莫尔(Richard Elmore)教授、康涅狄格大学(University of Connecticut)的罗纳德·贝格托(Ronald Beghetto)教授、普渡大学(Purdue University)的张华华教授、华东师范大学的袁振国教授以及堪萨斯大学(University of Kansas)的赵勇教授等。论坛的目的不是讨论LSA的技术问题或对其作出评价,而是讨论LSA的使用(或滥用)、LSA在教育中的作用,以及从哲学层面讨论在教育领域中用LSA进行评估的可能性与局限性。换言之,我们更感兴趣的是讨论LSA不能做什么,而不是它能做什么。我们更关注LSA对教育的负面影响,而不是积极影响。
文摘This study promotes application of Augmented Reality （AR）, whose properties can handle multiple sensory that heightens its quality of performances, affections in first time users, and introduces the possibility and guideline in mass production through the development of＂Augmented Reality Band＂, a gadget based on AR system that allows users to interact with virtual music instruments to make music through the system that analyze printed marker on the shirt. The system is developed by using FLAR Toolkit and made accessible via AR band website. The user can run the system online from anywhere by wearing the shirt printed with embedded musical instruments AR code. In order to promote AR Band performances, the authors assessed the quality of the system from technical professionals. It has been found out that the quality level is very high （4.64/5.00） and the user satisfaction evaluated by sample group has been found in a satisfied level （4.22/5.00）. In summary, AR Band has proven its performances to enhance user satisfaction and its further development and adaptation is under discussion and suggestion section provided at the end.
文摘A laboratory-based work was conducted on development, biometry （cyst diameter, hatching efficiency and hatching percentage） and survival rate of Artemia franciscana at 35 ppt using natural brine water under constant aeration facilities. The experiment was carried out for both chorionic and decapsulated cysts. There was a significant increase in hatching output of the decapsulated cysts than the chorionic cysts. The survival rate was counted only for the chorionic cysts because nauplii hatched from decapsulated cysts died after four days of incubation before reaching the adult stage. Untill now the Artemia cysts are imported from abroad. Though the prospect of mass production of Artemia in Bangladesh is feasible but there needs to be more studies done.
基金supported by the Defense Industrial Technology Development Program(Grant Nos.2016YFB0200700,JCKY2016601B001,and JCKY2016204B101)the Program of Introducing Talents of Discipline to Universities of China(111 Project)(Grant No.B07009)National Nature Science Foundation of China(Grant Nos.11372025,11432002,and11572024)
文摘In this article, we propose a parameter vertex method to determine the upper and lower bounds of the dynamic response of structures with interval parameters, which can be regarded as an extension of the matrix vertex method proposed by Qiu and Wang. The matrix vertex method requires considerable computation time and encounters the dependency problem in practice,thereby limiting its application in engineering. The proposed parameter vertex method can avoid the dependency problem, and the number of possible vertex combinations in the proposed method is significantly less than that in the matrix vertex method.The parameter vertex method requires that each matrix element in the dynamic differential equation is monotonic with respect to the uncertain parameter, and that the dynamic response reaches its extreme value when the uncertain parameter is at its endpoint.To further reduce the runtime, both vertical and transversal parallel algorithms are introduced and integrated into the parameter vertex method to improve its computational efficiency. Two numerical examples are presented to demonstrate the proposed method combined with both parallel algorithms. The performances of the two parallel algorithms are thoroughly studied. The parameter vertex method combined with parallel algorithm can be used for large-scale computing.
