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Analysis of prompt supercritical process with heat transfer and temperature feedback

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Nuclear Science and Techniques 2009年第5期20卷 317-320页

作者： ZHU Bo ZHU Qian chen zhiyun School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Nuclear Science and Engineering Naval University of Engineering Wuhan 430033 China

The prompt supercritical process of a nuclear reactor with temperature feedback and initial power as well as heat transfer with a big step reactivity (ρ0>β) is analyzed in this paper. Considering the effect of heat transfer on temperature of the reactor, a new model is set up. For any initial power, the variations of output power and reactivity with time are obtained by numerical method. The effects of the big inserted step reactivity and initial power on the prompt supercritical process are analyzed and discussed. It was found that the effect of heat transfer on the output power and reactivity can be neglected under any initial power, and the output power obtained by the adiabatic model is basically in accordance with that by the model of this paper, and the analytical solution can be adopted. The results provide a theoretical base for safety analysis and operation management of a power reactor.

关键词：超临界温度反应核技术核反应堆

Three New Records of Gastropoda(Mollusca) from the Nansha Islands,China

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Journal of Ocean University of China 2018年第2期17卷 433-436页

作者： chen zhiyun SHI Wei GONG Li Marine Biodiversity Collections of South China Sea/Key Laboratory of Tropical Marine Bio-Resources and Biology South China Sea Institute of Oceanology Chinese Academy of Sciences

The Nansha Islands, China, have extremely high marine biodiversity and hundreds of mollusks have been reported there. Benthos resources investigations of the intertidal and subtidal zone around the Nansha Islands have been continuously performed for decades, and recently, dozens of new species and new records of mollusks have been reported from this area. This paper dealt with three new record species of the Gastropoda from Chinese waters: Cerithium salebrosum Sowerby II, 1855, Vexillum militare(Reeve, 1845) and Vexillum bizonale(Dautzenberg et Bouge, 1923), respectively belonging to three families: Cerithiidae Fleming, 1822, and Costellariidae Mac Donald, 1860. All specimens were collected from the Nansha Islands during the benthos resources investigations on the intertidal zone of islands and reefs in the South China Sea in recent years. Diagnosis and geographic descriptions of both genus and species, illustrations of each species were given in this contribution, and discussion of taxonomy, identification features and faunal characteristics were presented. All examined specimens were deposited in the Marine Biodiversity Collections of South China Sea, Chinese Academy of Sciences.

关键词： Gastropoda Cerithium salebrosum Vexillum militare Vexillum bizonale new records Nansha Islands

A Fast Filling Algorithm for Image Restoration Based on Contour Parity

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Computers, Materials & Continua 2020年第4期63卷 509-519页

作者： Yan Liu Wenxin Hu Longzhe Han Maksymyuk Taras zhiyun chen School of Data Science and Engineering East China Normal UniversityShanghai200062China JiangXi Province Key Laboratory of Water Information Cooperative Sensing and Intelligent Processing Nanchang Institute of TechnologyNanchang330099China Department of Telecommunication Institute of Telecommunication Radio Electronics and Electronic EngineeringLviv Polytechnic National UniversityLviv79013Ukraine

Filling techniques are often used in the restoration of *** the existing filling technique approaches either have high computational costs or present problems such as filling holes *** paper proposes a novel algorithm for filling holes and regions of the *** proposed algorithm combines the advantages of both the parity-check filling approach and the region-growing inpainting *** points of the region’s boundary are used to search and to fill the *** scanning range of the filling method is within the target *** proposed method does not require additional working memory or assistant colors,and it can correctly fill any complex *** results show that,compared to other approaches,the proposed algorithm fills regions faster and with lower computational cost.

关键词： Region filling image restoration parity check region growing

Planaxidae(Mollusca, Gastropoda) from the South China Sea

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Journal of Oceanology and Limnology 2018年第2期36卷 548-555页

作者： chen zhiyun ZHANG Junlong LIAN Xiping TAN Yehui Marine Biodiversity Collections of South China Sea~Key Laboratory of Tropical Marine Bio-Resources and Biology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Department of Marine Organism Taxonomy and Phylogeny Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

Abstract Planaxidae is a family of tropical and subtropical marine gastropods that are adapted to an intertidal, rocky environment. The present study deals with three species in the family Planaxidae from the South China Sea： Planaxis sulcatus （von Born, 1778）, Angiola longispira （Smith, 1872）, and Supplanaxis niger （Quoy and Gaimard, 1833）, based on specimens deposited in the Marine Biodiversity Collections of the South China Sea, Chinese Academy of Sciences. The taxonomic status, main morphological characteristics of the shell and radula, distribution, and habitat of these three planaxid species are presented. We also briefly discuss their morphological differences and the biogeographic distribution.

关键词： Planaxidae Planaxis sulcatus Angiola longispira Supplanaxis niger radula South China Sea

Energetic,bio-oil,biochar,and ash performances of co-pyrolysis-gasification of textile dyeing sludge and Chinese medicine residues in response to K_(2)CO_(3),atmosphere type,blend ratio,and temperature

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Journal of Environmental Sciences 2024年第2期136卷 133-150页

作者： Gang Zhang zhiyun chen Tao chen Shaojun Jiang Fatih Evrendilek Shengzheng Huang Xiaojie Tang Ziyi Ding Yao He Wuming Xie Jingyong Liu Engineering Research Center of None-food Biomass Efficient Pyrolysis and Utilization Technology of Guangdong Higher Education Institutes Dongguan University of TechnologyDongguan 523808China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou 510006China School of Environment The Environmental Research InstituteMOE Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China Department of Environmental Engineering Bolu Abant Izzet Baysal UniversityBolu 14052Turkey

Hazardous waste stream needs to be managed so as not to exceed stock-and rate-limited properties of its recipient *** co-pyrolysis of Chinese medicine residue(CMR)and textile dyeing sludge(TDS)and its bio-oil,biochar,and ash quality and quantity were characterized as a function of the immersion of K_(2)CO_(3),atmosphere type,blend ratio,and *** to the mono-pyrolysis of TDS,its co-pyrolysis performance with CMR(the comprehensive performance index(CPI))significantly improved by 33.9%in the N_(2)atmosphere and 33.2%in the CO_(2)*** impregnation catalyzed the co-pyrolysis at 370℃,reduced its activation energy by 77.3 kJ/mol in the N_(2)atmosphere and 134.6 kJ/mol in the CO_(2)atmosphere,and enriched the degree of coke gasification by 44.25%in the CO_(2)*** impregnation increased the decomposition rate of the co-pyrolysis by weakening the bond energy of fatty side chains and bridge bonds,its catalytic and secondary products,and its bio-oil yield by 66.19%.Its bio-oils mainly contained olefins,aromatic structural substances,and *** immersion of K_(2)CO_(3)improved the aromaticity of the copyrolytic biochars and reduced the contact between K and Si which made it convenient for Mg to react with SiO_(2)to form *** co-pyrolytic biochar surfaces mainly included-OH,-CH_(2),C=C,and *** main phases in the co-pyrolytic ash included Ca_(5)(PO_(4))_(3)(OH),Al_(2)O_(3),and magnesium-silicate.

关键词： Chemical impregnation Catalytic pyrolysis Chinese medicine residue Textile dyeing sludge Co-pyrolysis

Evaluation of Natural Ecological Environment in Guangzhou City Based on Remote Sensing Technology and Comprehensive Index Method

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Journal of Landscape Research 2016年第3期8卷 79-82页

作者： MA Jiaojiao NIU Anyi chen zhiyun School of Geographical Sciences South China Normal University School of Geographic Science and Tourism Jiaying University

Based on the ETM remote sensing images of Guangzhou City in 2014, the spatial distribution results o f three environmental factors including vegetation coverage(NDVI), soil index(vegetation index of bare soil) and sl ope were obtained. By using comprehensive index method, the normalized environmental factors were weighted and superimposed, and the fi nal evaluation results of ecological environment in Guangzhou City were obtained. The results showed that overall situation of natural ecological environment in Guangzhou was not optimistic, that is, the area of land with bad, moderate, good and superior environment accounted for 59.70%, 35.79%, 4.50% and around 0.01% of total area of land in Guangzhou City respectively. Ecological environment was generally poor in the central urban districts in the south of Guangzhou City, while it was relatively better in the north and northeast. Attaching importance to the constr uction of greenbelts and greenways is an effective way to improve regional environmental quality and natural ecological e nvironment level.

关键词： Remote sensing interpretation Natural ecological environment Comprehensive index method Environmental assessment Guangzhou

Influence of Meta-stereotype on Well-being and Authenticity

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Psychology Research 2022年第6期12卷 355-361页

作者： WU Jiatong WU Yingying chen zhiyun Dilhumar•Mahmut Shanghai Normal University ShanghaiChina

In order to explore the influence of the degree of impression on the subjective well-being and truthfulness,the present situation paradigm was used to investigate the difference between the truthfulness and the sense of well-being of the introverted individuals with negative meta-stereotype in the neutral social *** to the data from the self-designed questionnaire survey,introvert workers/university students were divided into two groups:the high negative group and the low negative group,and their subjective well-being and authenticity were measured by the corresponding version of the *** results showed that introverted individuals with high negative meta-stereotype had lower subjective well-being and authenticity than those with low negative meta-stereotype in neutral social situations,and their identity and gender had no effect on subjective well-being and ***:The subjective well-being and authenticity of introverted individuals with more negative meta-stereotype are lower.

关键词： stereotype meta-stereotype introvert subjective well-being authenticity

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文博类电视节目深度融合传播策略分析

电视研究 2021年第6期 55-56页

作者：陈芷韵中国传媒大学国际传媒教育学院

文博类电视节目植根于中华优秀传统文化,承载着弘扬优秀传统文化与时代精神的使命。本文通过对《典籍里的中国》《国家宝藏》等优质文博类电视节目进行内容生产、表达形式、传播渠道三个方面的解读,剖析其成功的传播策略,期望为传统文... 详细信息

文博类电视节目植根于中华优秀传统文化,承载着弘扬优秀传统文化与时代精神的使命。本文通过对《典籍里的中国》《国家宝藏》等优质文博类电视节目进行内容生产、表达形式、传播渠道三个方面的解读,剖析其成功的传播策略,期望为传统文化在媒体深度融合的时代背景下的传播和发扬提供路径参考。

关键词：文博类电视节目媒体融合内容生产媒介技术

拉美一体化研究的创新性成果——读《走向开放的地区主义——拉丁美洲一体化研究》有感

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拉丁美洲研究 2006年第2期28卷 76-77页

作者：陈芝芸

南开大学历史学院拉美研究中心王萍博士的学术专著《走向开放的地区主义——拉丁美洲一体化研究》，已于2005年7月由人民出版社出版。这是我国学术界关于拉美一体化的又一部力作。作者在其博士论文的基础上作了认真的修改和补充，从理... 详细信息

南开大学历史学院拉美研究中心王萍博士的学术专著《走向开放的地区主义——拉丁美洲一体化研究》，已于2005年7月由人民出版社出版。这是我国学术界关于拉美一体化的又一部力作。作者在其博士论文的基础上作了认真的修改和补充，从理论的高度对拉美一体化战略作了全面、系统、深入的分析。该书的出版是对我国拉美研究事业的新贡献，令人欣喜。

关键词：拉美一体化地区主义普雷维什创新性拉丁美洲