The high-temperature reactor pebble-bed mod-ule(HTR-PM)is a modular high-temperature gas-cooled reactor demonstration power plant.Its first criticality experiment is scheduled for the latter half of 2021.Before perfor...The high-temperature reactor pebble-bed mod-ule(HTR-PM)is a modular high-temperature gas-cooled reactor demonstration power plant.Its first criticality experiment is scheduled for the latter half of 2021.Before performing the first criticality experiment,a prediction calculation was performed using PANGU code.This paper presents the calculation details for predicting the HTR-PM first criticality using PANGU,including the input model and parameters,numerical results,and uncertainty analysis.The accuracy of the PANGU code was demonstrated by comparing it with the high-fidelity Monte Carlo solution,using the same input configurations.It should be noted that k eff can be significantly affected by uncertainties in nuclear data and certain input parameters,making the criticality calculation challenge.Finally,the PANGU is used to pre-dict the critical loading height of the HTR-PM first criti-cality under design conditions,which will be evaluated in the upcoming experiment later this year.展开更多
The evolution of mythological motifs is a common phenomenon in the transmission of myths.This article takes the representative Pangu myth from cultural ancestor myths as an example to explore,at a theoretical level,th...The evolution of mythological motifs is a common phenomenon in the transmission of myths.This article takes the representative Pangu myth from cultural ancestor myths as an example to explore,at a theoretical level,the relationship between the evolution of mythological motifs and their hierarchical structure.It elaborates on several aspects,including the changes in the expression of mythological motifs,the extension of the connotation of mythological motifs,and the evolution of the nature of mythological motifs.Additionally,it analyzes the impact of mythological carriers,narrators,the folk environment of myth transmission,and research outcomes on the evolution of mythological motifs.展开更多
大语言模型(large language model,LLM)为数据库性能带来了极大的提升,将LLM与数据库相结合成为当前的研究热点。然而,目前大部分高校数据库实验课程仍停留于数据库基础操作层面,学生普遍缺乏数据库前沿技术相关知识。文本转结构化查询...大语言模型(large language model,LLM)为数据库性能带来了极大的提升,将LLM与数据库相结合成为当前的研究热点。然而,目前大部分高校数据库实验课程仍停留于数据库基础操作层面,学生普遍缺乏数据库前沿技术相关知识。文本转结构化查询语言(text to structured query language,Text-to-SQL)技术为基于LLM的数据库设计的重要研究方向之一。首先,设计实验课程系统地介绍基于LLM的Text-to-SQL方法的教学意义,以盘古大模型为例对实验课程相关技术进行介绍;其次,分析并划定基于LLM的数据库设计实验课程的教学目标,阐述具体的教学设计和实施;最后,对教学方法设计的各方面进行系统总结。展开更多
基金supported by the National S&T Major Project of China(Nos.ZX0690,ZX06902)the CNNC Youth Research Project.
文摘The high-temperature reactor pebble-bed mod-ule(HTR-PM)is a modular high-temperature gas-cooled reactor demonstration power plant.Its first criticality experiment is scheduled for the latter half of 2021.Before performing the first criticality experiment,a prediction calculation was performed using PANGU code.This paper presents the calculation details for predicting the HTR-PM first criticality using PANGU,including the input model and parameters,numerical results,and uncertainty analysis.The accuracy of the PANGU code was demonstrated by comparing it with the high-fidelity Monte Carlo solution,using the same input configurations.It should be noted that k eff can be significantly affected by uncertainties in nuclear data and certain input parameters,making the criticality calculation challenge.Finally,the PANGU is used to pre-dict the critical loading height of the HTR-PM first criti-cality under design conditions,which will be evaluated in the upcoming experiment later this year.
基金supported by the National Social Science Fund of China,“Construction of Chinese Minority Mythology Database”(No.17ZDA161)“Comparative Study on Folk Literature of Altaic Ethnic Groups in China”(No.18ZDA272).
文摘The evolution of mythological motifs is a common phenomenon in the transmission of myths.This article takes the representative Pangu myth from cultural ancestor myths as an example to explore,at a theoretical level,the relationship between the evolution of mythological motifs and their hierarchical structure.It elaborates on several aspects,including the changes in the expression of mythological motifs,the extension of the connotation of mythological motifs,and the evolution of the nature of mythological motifs.Additionally,it analyzes the impact of mythological carriers,narrators,the folk environment of myth transmission,and research outcomes on the evolution of mythological motifs.
文摘大语言模型(large language model,LLM)为数据库性能带来了极大的提升,将LLM与数据库相结合成为当前的研究热点。然而,目前大部分高校数据库实验课程仍停留于数据库基础操作层面,学生普遍缺乏数据库前沿技术相关知识。文本转结构化查询语言(text to structured query language,Text-to-SQL)技术为基于LLM的数据库设计的重要研究方向之一。首先,设计实验课程系统地介绍基于LLM的Text-to-SQL方法的教学意义,以盘古大模型为例对实验课程相关技术进行介绍;其次,分析并划定基于LLM的数据库设计实验课程的教学目标,阐述具体的教学设计和实施;最后,对教学方法设计的各方面进行系统总结。
