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小型长寿期铅铋堆主要设备辐照损伤计算
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作者 胡晓 喻宏 +3 位作者 郭佳欣 黄毅 乔鹏瑞 王事喜 《核电子学与探测技术》 CAS 北大核心 2023年第5期931-939,共9页
通过计算小型长寿期铅铋堆主要部件和设备的原子离位数dpa,评估结构材料的辐照损伤程度。首先用MCNP计算反应堆内部最敏感的位置,采用SPECTER、SRIM程序分别计算包壳、组件外套管、异型钢、吊篮在寿期内的dpa。结果表明:SRIM与SPECTER... 通过计算小型长寿期铅铋堆主要部件和设备的原子离位数dpa,评估结构材料的辐照损伤程度。首先用MCNP计算反应堆内部最敏感的位置,采用SPECTER、SRIM程序分别计算包壳、组件外套管、异型钢、吊篮在寿期内的dpa。结果表明:SRIM与SPECTER计算结果对比,偏差在6%以内;铅铋堆堆内部件辐照损伤最严重的部件是堆芯中心补偿棒组件的外套管,在辐照寿期内dpa为17.95,远小于设计限值30;铅铋堆在寿期内运行,结构材料的辐照损伤均在安全限值范围内。研究结论对小型铅铋堆设计和安全运行具有参考价值。 展开更多
关键词 辐照损伤 铅铋堆 SPECTER SRIM
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Specter聚类方法在单细胞RNA测序数据分析中的应用
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作者 何佳 王文杰 +1 位作者 张刘超 李康 《中国卫生统计》 CSCD 北大核心 2023年第3期354-357,362,共5页
目的研究Specter聚类的原理和方法,探讨其适用条件,并将其应用于卵巢癌单细胞测序(scRNA-seq)数据的聚类分析,标记得到的细胞亚群。方法通过模拟试验和实际单细胞RNA数据分析,对Specter聚类和较常用的其他三种方法进行比较,并用ARI和NM... 目的研究Specter聚类的原理和方法,探讨其适用条件,并将其应用于卵巢癌单细胞测序(scRNA-seq)数据的聚类分析,标记得到的细胞亚群。方法通过模拟试验和实际单细胞RNA数据分析,对Specter聚类和较常用的其他三种方法进行比较,并用ARI和NMI两种评价指标的总得分进行评价。结果模拟试验显示,在设定的条件下,Specter聚类性能均优于其他三种方法;实例数据结果也表明,Specter聚类能够得到合理的细胞亚群。结论Specter聚类方法降低了参数敏感性,提高了聚类的准确性,具有研究价值和应用价值。 展开更多
关键词 Specter scRNA-seq 聚类 细胞亚群
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The Dilemma of Global Capitalism and Ethical Reflection in Transmission
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作者 Yao-hung Haung 《Journal of Literature and Art Studies》 2018年第2期257-263,共7页
This essay focuses on the overwhelming influence of global capitalism, in which the eruption of the Zi^ekian Real serves as the disruptive subversion. This essay suggests that the reading of ZiZek's and Derridean eth... This essay focuses on the overwhelming influence of global capitalism, in which the eruption of the Zi^ekian Real serves as the disruptive subversion. This essay suggests that the reading of ZiZek's and Derridean ethical notions not only shed light on the present global disappointment, but unfold a complementary critical facet in our democratic society. In order to explore the complexity and contradiction of capitalism in Transmission, my reading locates the working of global capitalism as a psychoanalytical mode of drive and desire. These two modes become two elementary motivations forming one's dream of being wealthy and the nightmare of being abandoned in Haft Kunzru's Transmission. In the novel, the Indian computer engineer, Arjun Mehta, desires to save his job by creating a computer virus, which, I aver, turns out to trigger the eruption of the ZiZekian Real, dissolving the exclusive domain of global capitalism. Both Arjun and the CEO of Tomorrow, Guy Swift turn out to be the victims of global capitalism, even though the former believes in American dream and the later believes in the power of the future. It is the traumatic experience that shatters Guy's dream of global capitalism and triggers his absolute responsibility to the other. It also shatters Arjun's strong faith in global capitalism. I argue that it is imperative for readers to review the devouring drive of global capitalism to eschew the devastating consequence, by the reflecting ethically on global capitalism. Both ZiZek and Derrida's ethical reflection may offer us a way out of the dilemma of global capitalism. 展开更多
关键词 Hari Zunzru DERRIDA Zizek Absolute Responsibility The Gift of Death specters of Marx ETHICS
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Calculation of dpa rate in graphite box of Tehran Research Reactor(TRR) 被引量:2
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作者 Mohamad Amin Amirkhani Mohsen Asadi Asadabad +2 位作者 Mostafa Hassanzadeh Seyed Mohammad Mirvakili Ali Mohammadi 《Nuclear Science and Techniques》 SCIE CAS CSCD 2019年第6期44-56,共13页
Radiation damage is an important factor that must be considered while designing nuclear facilities and nuclear materials. In this study, radiation damage is investigated in graphite, which is used as a neutron reflect... Radiation damage is an important factor that must be considered while designing nuclear facilities and nuclear materials. In this study, radiation damage is investigated in graphite, which is used as a neutron reflector in the Tehran Research Reactor (TRR) core. Radiation damage is shown by displacement per atom (dpa) unit. A cross section of the material was created by using the SPECOMP code. The concentration of impurities present in the non-irradiated graphite was measured by using the ICP-AES method. In the present study the MCNPX code had identified the most sensitive location for radiation damage inside the reactor core. Subsequently, the radiation damage (spectral-averaged dpa values) in the aforementioned location was calculated by using the SPECTER, SRIM Monte Carlo codes, and Norgett, Robinson and Torrens (NRT) model. The results of “Ion Distribution and Quick Calculation of Damage”(QD) method groups had a minor difference with the results of the SPECTER code and NRT model. The maximum radiation damage rate calculated for the graphite present in the TRR core was 1.567 9 10^-8 dpa/s. Finally, hydrogen retention was calculated as a function of the irradiation time. 展开更多
关键词 Radiation damage GRAPHITE SPECTER SRIM MCNPX TEHRAN Research Reactor
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一种铅冷快堆主要构件的辐照损伤计算
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作者 杨韵颐 李林森 +1 位作者 陈笑松 陈耀东 《核技术》 CAS CSCD 北大核心 2020年第6期35-40,共6页
为满足公众对更安全、更经济和环境更友好的核能系统的需求,提出一种铅铋合金冷却的铅冷快堆(Breeding Lead-based Economical Safe System–Demonstration,BLESS-D)。BLESS-D反应堆采用池式结构,热功率300 MW。金属材料受中子辐照时将... 为满足公众对更安全、更经济和环境更友好的核能系统的需求,提出一种铅铋合金冷却的铅冷快堆(Breeding Lead-based Economical Safe System–Demonstration,BLESS-D)。BLESS-D反应堆采用池式结构,热功率300 MW。金属材料受中子辐照时将造成材料的晶格缺陷,导致材料的宏观性能变化,改变其物理和机械性能。BLESS-D反应堆中有许多在反应堆寿期内不可更换的关键部件和设备,这些构件在反应堆运行期间如受到中子辐照损伤,将影响构件材料的性能,进而导致设备的使用寿命,限制了反应堆的寿命。本文通过计算BLESS-D反应堆主要部件和设备的原子离位数(Displacement Per Atom,DPA),评估结构材料的辐照损伤程度。利用SPECTER程序和MCNP程序进行燃料包壳、内部容器、主泵泵壳、蒸汽发生器壳和反应堆容器的DPA模拟计算,计算结果与发生材料辐照效应的DPA限值进行比较,发现内部容器的累积DPA在20年寿期内超过了材料辐照效应限值,需要进一步分析并优化设计,确保其寿期内的安全性。 展开更多
关键词 铅冷快堆 辐照损伤 DPA MCNP SPECTER
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When the Childhood Event Unfolds Itself:On the Survivor’s Guilt in The Kite Runner by Khaled Hosseini
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作者 Emily ShuHui Tsai 《Journal of Literature and Art Studies》 2018年第10期1431-1444,共14页
This short paper aims to discuss the unbearably-heavy weight of childhood memory and the survivor’s guilt as the symptoms in the novel,The Kite Runner,published in 2003,by an Afghan-American writer,Khaled Hosseini.It... This short paper aims to discuss the unbearably-heavy weight of childhood memory and the survivor’s guilt as the symptoms in the novel,The Kite Runner,published in 2003,by an Afghan-American writer,Khaled Hosseini.It describes the ambivalent relationship between the father and the son against the background of political turmoil in Afghanistan—how they have a good life together in Afghanistan and afterwards how they are forced to leave their homeland like refugees to Pakistan and then to The United States for a new life with the survivor’s guilt after the tumultuous period of the Soviet military invasion.The narrator,Amir,treasures the memories of his old homeland,Afghanistan,the innermost remnants of his being,which has become as the specter haunting his present life in the United States.Amir has to return to his old homeland to meet his father’s closest friend,Rahim Khan,and to rescue Sohrad,the son of his half-brother,Hassan,from the Taliban regime.This ethical return to the past not only has unfolded certain secrecy of his father’s dishonor but also has healed his sense of survivor’s guilt because of his evil rivalry of jealousy against Hassan to fully possess his father’s love in his childhood.In my discussion of ethnic hierarchy and conflicts in Afghanistan described in the novel,Jacques Derrida’s and Giorgio Agamben’s theoretical concepts,such as the problematic of sovereignty,sovereign animality and bare life in The Beast&the Soveriegn and Homo Sacer,will be used to penetrate the deeper understanding of their traumatic past as haunting specters. 展开更多
关键词 CHILDHOOD memory SYMPTOM survivor’s GUILT specter bare life SOVEREIGNTY ANIMALITY
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The Lost Archive: On Events in Difference of Repetition
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作者 Emily ShuHui Tsai 《Journal of Philosophy Study》 2020年第12期894-901,共8页
The Freudian notion of the compulsion repetition governed by the death drive beyond the pleasure principle with its inherent persistence of a nostalgic dream both to restore the earlier state of things and to return t... The Freudian notion of the compulsion repetition governed by the death drive beyond the pleasure principle with its inherent persistence of a nostalgic dream both to restore the earlier state of things and to return to the inanimate state has attracted philosophers,particularly Deleuze and Derrida,to revise,enrich,and broaden the concept in their theories of difference in repetition and the archives.Deleuze reconnects it with Nietzsche’s notion of eternal return to tackle with the phenomenon of the events returning in difference of repetition.As to Lacan,the post-Freudian psychoanalyst,the death drive is in search of the lost Object,the original loss within the subject,Derrida theorizes the concept of archives in the unconscious memories to further elaborate that the death drive,in its interiorly-dialectical conflicts on the way to search for“a priori,”namely,“the origin,”has encountered the loss.Thus,the death drive,haunted by the specters of the past,develops the archive fever with the persistent passion to reach trembling sublimity.The movie,The Legend of 1900,directed by Giuseppe Tornatore,helps understand the problem that the talented pianist,1900,abandoned in the ship by his birth parents when he was born and raised by a black worker as his foster father who died by accident,chooses to die with the ruined ship,“his only home,”in absolute solitude although he was once driven by his passionate love for a woman to get off the ship and he failed the chance.The 1900’s official identity is the lost archive on the land;he has been haunted by the lost archive:no memories of his birth parents. 展开更多
关键词 ARCHIVE the death drive DIFFERENCE REPETITION the dark precursor the haunting specter
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The Empty Face of the Self-portrait: Time, Specter, and Event in The Fourth Portrait by Meng-Hung Chung
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作者 Emily ShuHui Tsai 《Journal of Philosophy Study》 2016年第5期255-266,共12页
This short paper aims to critically analyze a contemporary Taiwan Residents film, The Fourth Portrait, directed by Meng-Hung Chung, from the perspective of Delenzian theories. In Deleuze's two books on cinema, the di... This short paper aims to critically analyze a contemporary Taiwan Residents film, The Fourth Portrait, directed by Meng-Hung Chung, from the perspective of Delenzian theories. In Deleuze's two books on cinema, the discussion of images demonstrates the entangled juxtaposition of the three levels: brain-thought, cinema-screen, and world-images that compose the cinematic consciousness. Through the interacted movement-images and time-images, the film unfolds the storyline within the aesthetic pleasure of poetic sentiment that gradually leads the audience to learn that a wandering boy, Hsiao-Hsiang, after the death of his father, has had several adventurous encounters that gradually expose the secrecy of his traumatic family: His birth mother has no decent job and his step-father has killed his own brother. This broken family has been haunted by the shared guilt and the undead memory as Derrida famously claims that hauntology precedes ontology. As the past coexists with the present, Deleuze analyzes the concept of I, with a central fracture in its pure form of the past demonstrating an ontological enigma that remains forever a secret. When the director uses the four portraits to indicate the four important events of this wandering boy, he deliberately leaves empty the fourth portrait, the self-portrait of the boy; it remains as an incomplete piece which symbolizes an enigma of his own life. It shows certain constitutive unnamable forces acting within the boy that seduces him forever to painfully misrecognize himself. 展开更多
关键词 cinematic consciousness specter TIME images REPETITION
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神话的解构与过度的执守——阿尔都塞意识形态理论的基督教幽灵
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作者 周丹 《基督教文化学刊》 CSSCI 2014年第2期138-156,共19页
作为马克思的保卫者,阿尔都塞的意识形态理论似乎有些突兀。阿尔都塞选择基督教意识形态为范例,提出以呼召——质询为模式的意识形态结构。阿尔都塞探讨'意识形态一般'和意识形态国家机器以及再生产理论的文章,虽然洋溢着理论... 作为马克思的保卫者,阿尔都塞的意识形态理论似乎有些突兀。阿尔都塞选择基督教意识形态为范例,提出以呼召——质询为模式的意识形态结构。阿尔都塞探讨'意识形态一般'和意识形态国家机器以及再生产理论的文章,虽然洋溢着理论的创造激情,但与具有鲜明论辩色彩和不乏尖锐批判的其他著作相比,其立场的表达则显得较为中立。阿尔都塞对社会生活的诸多领域中无所不在的意识形态现象展开激烈的抨击,但其本人对意识形态的强制性同化。 展开更多
关键词 ALTHUSSER CHRISTIANITY specter ideological theory
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