This is a GATE-simulation study of the Siemens Biograph DUO PET/CT system. It reports effects of changes in the thickness of the employed Lutetium Oxyorthosilicate(LSO) detectors. The PET/CT, a human body phantom and ...This is a GATE-simulation study of the Siemens Biograph DUO PET/CT system. It reports effects of changes in the thickness of the employed Lutetium Oxyorthosilicate(LSO) detectors. The PET/CT, a human body phantom and a cylindrical F-18 FDG source were simulated. Validation measurements were conducted. The results indicate that LSO thickness increase degrades spatial resolution, improves relative energy resolution from 9.0% to 11.3% and increases signal-to-noise-ratio from 0.81 to 1.17. Thicker LSO crystals present greater axial sensitivity so as the detection efficiency of PET would be significantly enhanced.展开更多
He Binglin was born on August 24, 1918 in Fanyu County, Guangdong Province.He graduated from the Chemistry Department of Southwest Associated Universityin 1942. After graduation he worked in Chongqing Central Institut...He Binglin was born on August 24, 1918 in Fanyu County, Guangdong Province.He graduated from the Chemistry Department of Southwest Associated Universityin 1942. After graduation he worked in Chongqing Central Institute of Industry forone year as an assistant engineer and then returned to his Alma Mater University展开更多
Renyuan Qian was born on September 19, 1917 in Changshu, Jiangsu province.He graduated from the Chemistry Department of Zhejiang University in 1939. Inthe year of 1943, he went to the United States to take postgraduat...Renyuan Qian was born on September 19, 1917 in Changshu, Jiangsu province.He graduated from the Chemistry Department of Zhejiang University in 1939. Inthe year of 1943, he went to the United States to take postgraduate studies mainlyin the University of Wisconsin. In 1948, he returned to China and associated with Xiamen University and Zhe-展开更多
The article delves into the intellectual endeavors and contributions of David Riazanov in the realm of Marxist scholarship,particularly through his pivotal role at the Marx-Engels Institute(MEI)following the 1917 Bols...The article delves into the intellectual endeavors and contributions of David Riazanov in the realm of Marxist scholarship,particularly through his pivotal role at the Marx-Engels Institute(MEI)following the 1917 Bolshevik Revolution.Despite an early academic setback,Riazanov’s self-taught expertise in various disciplines laid a solid foundation for his contributions to Marxism.Riazanov’s tenure at the MEI was marked by significant projects aimed at collecting,editing,and publishing Marx and Engels’works,culminating in the comprehensive compilation MEGA1.His advocacy for an authentic representation of original texts underscored his scholarly rigor.Riazanov’s pre-revolutionary activities and his critical stance on Bolshevik policies highlighted his dedication to a broader socialist movement.Despite ideological differences and challenges,Riazanov’s efforts significantly advanced the understanding and dissemination of Marxist thought,underscoring the complex interplay between political activism and academic scholarship in the development of socialist ideology.展开更多
This study compares the biographies of Karl Marx by Franz Mehring and David Riazanov,highlighting three key differences in their portrayal of Marx’s life and ideology.Riazanov emphasized Marx’s Jewish background,cri...This study compares the biographies of Karl Marx by Franz Mehring and David Riazanov,highlighting three key differences in their portrayal of Marx’s life and ideology.Riazanov emphasized Marx’s Jewish background,criticized Mehring’s oversimplification of Marx’s father’s conversion to Christianity,and offered a nuanced view of Marx’s engagement with Jewish issues.Contrary to Mehring’s defense of Bakunin,Riazanov acknowledged Bakunin’s revolutionary zeal but critiqued his effectiveness and responsibility in the Nechayev affair.Lastly,Riazanov provided an in-depth analysis of Marx’s later years,challenging Mehring’s limited coverage and recognizing the significance of Marx’s late works and contributions to the labor movement.展开更多
People will never forget a scene at the First National Conference of Model Workers held in 1959,when the No.1 blast furnace of the No.1 Steelworks under the Benxi Iron & Steel Corporation was named a national stan...People will never forget a scene at the First National Conference of Model Workers held in 1959,when the No.1 blast furnace of the No.1 Steelworks under the Benxi Iron & Steel Corporation was named a national standard bearer of the Red Flag,with its productivity ratio having won the national championship.The story was reported by the People’s Daily,Soviet Women’s Journal and Benxi Daily.As the young leader of the cited team of furnacemen, Li Yiyi became known to all. Time flies by and 34 years have elapsed since then.展开更多
During a life-long career, everyone has memorable moments constantly cherished in the heart.So is the case for Prof. Yu Guocong. It was on May 29, 1959, when the late Premier Zhou Enlai came to visit Dr. Yu’s laborat...During a life-long career, everyone has memorable moments constantly cherished in the heart.So is the case for Prof. Yu Guocong. It was on May 29, 1959, when the late Premier Zhou Enlai came to visit Dr. Yu’s laboratory during his inspection tour at the Tianjin University. This has been an unforgettable event in Prof. Yu’s mind. When shaking hands with Prof. Yu, Premier Zhou said: "I heard that you have made great advances in the rescarch of heavy water. I am eagerly waiting for further success in your work. For the honor of our country, we must have heavy water developed with our own hands, in defiance of someone who attempts to strangle us." Looking into the Premier’s eyes of encouragement,Prof. Yu was then determined to live up to the expectations of the motherland by making a good job of his research work.展开更多
[目的/意义]梳理国际国家安全情报研究发展脉络与知识生产特征,揭示关键学者的群体画像、职业发展模式、合作网络结构与核心研究议题演进,以期为推动我国安全情报学科建设提供借鉴。[方法/过程]基于发文量标准,从Intelligence and Natio...[目的/意义]梳理国际国家安全情报研究发展脉络与知识生产特征,揭示关键学者的群体画像、职业发展模式、合作网络结构与核心研究议题演进,以期为推动我国安全情报学科建设提供借鉴。[方法/过程]基于发文量标准,从Intelligence and National Security期刊中筛选出核心著者,运用履历分析法将国外核心著者履历划分为学科背景、研究方向、科研成果和工作经历4个核心类属进行比较分析,采用LDA主题模型对发文进行主题挖掘,系统识别出情报研究者关注的核心议题。[结果/结论]核心著者群体呈现显著的男性主导、中老年资深学者为主、机构高度集中、学科背景偏重传统人文社科的特征;安全情报研究面临跨学科深度融合不足、学界与实践存在隔阂、技术伦理与法律探讨滞后等问题。展开更多
The historical image of Ouyang Xiu constructed during the Song Dynasty evolved from a multifaceted portrayal that balanced his political and literary achievements into a singular cultural symbol.In the Northern Song D...The historical image of Ouyang Xiu constructed during the Song Dynasty evolved from a multifaceted portrayal that balanced his political and literary achievements into a singular cultural symbol.In the Northern Song Dynasty,writings by Ouyang Xiu's family and epitaphs by his colleagues crafted a balanced narrative emphasizing both his official duties and literary merits,thus constructing a dual image of him as a principled remonstrator and a literary master.In the Southern Song Dynasty,official historiography gradually eroded his complex persona as a political reformer by selectively trimming political disputes and emphasizing his literary lineage,ultimately establishing him as a cultural exemplar beyond factional strife.Throughout this evolution of historical writing,Ouyang Xiu's sharpness as a remonstrator was gradually obscured in historical texts,while his image as a literary master,revered by all,became firmly established.The reshaping of Ouyang Xiu's image in historical writings across the Northern and Southern Song dynasties not only reflects the logic of selecting scholar-official role models under the influence of official ideology but also reveals the inherent pattern whereby individual distinctiveness fades into symbolic construction in historical writing.展开更多
文摘This is a GATE-simulation study of the Siemens Biograph DUO PET/CT system. It reports effects of changes in the thickness of the employed Lutetium Oxyorthosilicate(LSO) detectors. The PET/CT, a human body phantom and a cylindrical F-18 FDG source were simulated. Validation measurements were conducted. The results indicate that LSO thickness increase degrades spatial resolution, improves relative energy resolution from 9.0% to 11.3% and increases signal-to-noise-ratio from 0.81 to 1.17. Thicker LSO crystals present greater axial sensitivity so as the detection efficiency of PET would be significantly enhanced.
文摘He Binglin was born on August 24, 1918 in Fanyu County, Guangdong Province.He graduated from the Chemistry Department of Southwest Associated Universityin 1942. After graduation he worked in Chongqing Central Institute of Industry forone year as an assistant engineer and then returned to his Alma Mater University
文摘Renyuan Qian was born on September 19, 1917 in Changshu, Jiangsu province.He graduated from the Chemistry Department of Zhejiang University in 1939. Inthe year of 1943, he went to the United States to take postgraduate studies mainlyin the University of Wisconsin. In 1948, he returned to China and associated with Xiamen University and Zhe-
基金supported by the National Social Science Fund’s project on“Research on the Collection,Organization,and Translation Dissemination of Biographical Literature on Marx”(Grant No.22CDJ003).
文摘The article delves into the intellectual endeavors and contributions of David Riazanov in the realm of Marxist scholarship,particularly through his pivotal role at the Marx-Engels Institute(MEI)following the 1917 Bolshevik Revolution.Despite an early academic setback,Riazanov’s self-taught expertise in various disciplines laid a solid foundation for his contributions to Marxism.Riazanov’s tenure at the MEI was marked by significant projects aimed at collecting,editing,and publishing Marx and Engels’works,culminating in the comprehensive compilation MEGA1.His advocacy for an authentic representation of original texts underscored his scholarly rigor.Riazanov’s pre-revolutionary activities and his critical stance on Bolshevik policies highlighted his dedication to a broader socialist movement.Despite ideological differences and challenges,Riazanov’s efforts significantly advanced the understanding and dissemination of Marxist thought,underscoring the complex interplay between political activism and academic scholarship in the development of socialist ideology.
基金supported by the National Social Science Fund’s project on“Research on the Collection,Organization,and Translation Dissemination of Biographical Literature on Marx”(Grant No.22CDJ003).
文摘This study compares the biographies of Karl Marx by Franz Mehring and David Riazanov,highlighting three key differences in their portrayal of Marx’s life and ideology.Riazanov emphasized Marx’s Jewish background,criticized Mehring’s oversimplification of Marx’s father’s conversion to Christianity,and offered a nuanced view of Marx’s engagement with Jewish issues.Contrary to Mehring’s defense of Bakunin,Riazanov acknowledged Bakunin’s revolutionary zeal but critiqued his effectiveness and responsibility in the Nechayev affair.Lastly,Riazanov provided an in-depth analysis of Marx’s later years,challenging Mehring’s limited coverage and recognizing the significance of Marx’s late works and contributions to the labor movement.
文摘People will never forget a scene at the First National Conference of Model Workers held in 1959,when the No.1 blast furnace of the No.1 Steelworks under the Benxi Iron & Steel Corporation was named a national standard bearer of the Red Flag,with its productivity ratio having won the national championship.The story was reported by the People’s Daily,Soviet Women’s Journal and Benxi Daily.As the young leader of the cited team of furnacemen, Li Yiyi became known to all. Time flies by and 34 years have elapsed since then.
文摘During a life-long career, everyone has memorable moments constantly cherished in the heart.So is the case for Prof. Yu Guocong. It was on May 29, 1959, when the late Premier Zhou Enlai came to visit Dr. Yu’s laboratory during his inspection tour at the Tianjin University. This has been an unforgettable event in Prof. Yu’s mind. When shaking hands with Prof. Yu, Premier Zhou said: "I heard that you have made great advances in the rescarch of heavy water. I am eagerly waiting for further success in your work. For the honor of our country, we must have heavy water developed with our own hands, in defiance of someone who attempts to strangle us." Looking into the Premier’s eyes of encouragement,Prof. Yu was then determined to live up to the expectations of the motherland by making a good job of his research work.
文摘[目的/意义]梳理国际国家安全情报研究发展脉络与知识生产特征,揭示关键学者的群体画像、职业发展模式、合作网络结构与核心研究议题演进,以期为推动我国安全情报学科建设提供借鉴。[方法/过程]基于发文量标准,从Intelligence and National Security期刊中筛选出核心著者,运用履历分析法将国外核心著者履历划分为学科背景、研究方向、科研成果和工作经历4个核心类属进行比较分析,采用LDA主题模型对发文进行主题挖掘,系统识别出情报研究者关注的核心议题。[结果/结论]核心著者群体呈现显著的男性主导、中老年资深学者为主、机构高度集中、学科背景偏重传统人文社科的特征;安全情报研究面临跨学科深度融合不足、学界与实践存在隔阂、技术伦理与法律探讨滞后等问题。
基金an initial outcome of the Research on the Interactive Relationship Between Biographies and Epitaphs in Ancient China,a project(ID:24BZW023)supported by the National Social Science Fund of China。
文摘The historical image of Ouyang Xiu constructed during the Song Dynasty evolved from a multifaceted portrayal that balanced his political and literary achievements into a singular cultural symbol.In the Northern Song Dynasty,writings by Ouyang Xiu's family and epitaphs by his colleagues crafted a balanced narrative emphasizing both his official duties and literary merits,thus constructing a dual image of him as a principled remonstrator and a literary master.In the Southern Song Dynasty,official historiography gradually eroded his complex persona as a political reformer by selectively trimming political disputes and emphasizing his literary lineage,ultimately establishing him as a cultural exemplar beyond factional strife.Throughout this evolution of historical writing,Ouyang Xiu's sharpness as a remonstrator was gradually obscured in historical texts,while his image as a literary master,revered by all,became firmly established.The reshaping of Ouyang Xiu's image in historical writings across the Northern and Southern Song dynasties not only reflects the logic of selecting scholar-official role models under the influence of official ideology but also reveals the inherent pattern whereby individual distinctiveness fades into symbolic construction in historical writing.
