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Nuclear Science and Techniques 2023年第2期34卷 109-127页

作者： Wei‑Hao Ji Jian‑Jie Cheng Han‑zhong tao Wei Li College of Urban Construction Nanjing Tech UniversityNanjing 211800China School of Energy Science and Engineering Nanjing Tech UniversityNanjing 211800China

Dry storage containers must be secured and reliable during long-term storage,and the effect of decay heat released from the internal spent fuel on the cask has become an important research *** this paper,a 3D computational fluid dynamics model is presented,and the accuracy of the calculation is verified,with computational errors of less than 6.2%.The thermal stress of the dry storage cask was estimated by coupling it with a transient temperature *** total power remained constant and adjusting the power ratio of the inner and outer zones had a small effect on the stress results,with a maximum equivalent stress of approximately 5.2 kPa,which occurred at the lower edge of the *** the case of tilt,the temperature gradient varied in a wavy distribution,and the wave crest moved from right to *** the tilt angle affects the air distribution in the annular gap,leading to the shell temperature being transformed,with a maximum equivalent stress of 202 MPa at the bottom of the ***,the equivalent stress in both cases was less than the yield stress(205 MPa).

关键词： Thermal stress CFD simulation Spent nuclear fuel Dry storage cask

A Simple and Efficient Algorithm to Identify the Chirality of Polymer Knots Based on the Alexander Polynomial

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Chinese Journal of Polymer Science 2024年第12期42卷 2030-2037,I0012页

作者： Qi-Yuan Qiu Yong-Jian Zhu zhong-tao Wu Liang Dai Department of Physics City University of Hong KongHong Kong999077China Shenzhen Research Institute City University of Hong KongShenzhen518057China Department of Mathematics The Chinese University of Hong KongHong Kong999077China

Recent experimental observations of knotting in DNA and proteins have stimulated the simulation studies of polymer *** studies usually identify knots in polymer conformations through the calculation of the Alexander ***,the Alexander polynomial cannot directly discriminate knot chirality,while knot chirality plays important roles in many physical,chemical,and biological *** this work,we discover a new relationship for knot chirality and accordingly,develop a new algorithm to extend the applicability of the Alexander polynomial to the identification of knot *** algorithm adds an extra step in the ordinary calculation of the Alexander *** extra step only slightly increases the computational *** correctness of our algorithm has been proved mathematically by *** implication of this algorithm in physical research has been demonstrated by our studies of the tube model for polymer *** this algorithm,we would be unable to obtain the tubes for polymer knots.

关键词： Polymerentanglement Polymer knot Polymerconformation Tubemodel Monte Carlo simulation

Synergistic Effect and Fluorination Effect in Ethylene Polymerization by Nickel Phenoxyiminato Catalysts

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Chinese Journal of Polymer Science 2018年第2期36卷 244-251页

作者： Di Xu Xiang-Xiang Zhao zhong-tao Chen Yu-Guo Ma Beijing National Laboratory for Molecular Sciences (BNLMS) Center for Soft Matter Science and Engineering Key Lab of Polymer Chemistry & Physics of Ministry of Education College of Chemistry Peking University

A series of binuclear nickel phenoxyiminato catalysts with different linkers and fluorine substituents were efficiently synthesized. Binuclear nickel catalysts with rigid linkers showed higher catalytic activity and thermal stability in ethylene polymerization and produced polymers with higher molecular weight possibly due to the larger steric hindrance and metal-metal synergistic effect. The introduction of fluorine atoms on the N-terphenyl moity also enhanced polymerization activity and molecular weight of polymer due to the electronic effect of fluorine atoms.

关键词： Nickel phenoxyiminato catalysts Fluorination effect Synergistic effect Bimetallic catalysts

Recent progress in the synthesis of sulfonyl fluorides for SuFEx click chemistry

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Chinese Chemical Letters 2021年第9期32卷 2736-2750页

作者： tao zhong Zhida Chen Jitao Yi Gui Lu Jiang Weng Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhou 510006China

Since the sulfur(Ⅵ)fluoride exchange reaction(SuFEx)was introduced by Sharpless and co-workers in 2014,this new-generation click chemistry has emerged as an efficient and reliable tool for creating modular intermolecular *** fluorides,one of the most important sulfur(Ⅵ)fluoride species,have attracted enormous attention in diverse fields,ranging from organic synthesis and material science,to chemical biology and drug *** review aims to introduce seminal and recent progresses on the synthetic methods of sulfonyl fluorides,which include aromatic,aliphatic,alkenyl,and alkynyl sulfonyl *** not meant to be exhaustive,the purpose is to give a timely overview and insight in this field,and stimulate the development of more efficient synthetic methods of sulfonyl fluorides.

关键词： Click chemistry Sulfur(Ⅵ)fluoride exchange Sulfonyl fluorides Fluorine chemistry Synthetic methods

胶合板行业VOCs全过程清洁生产整治提升研究

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林产工业 2025年第1期62卷 80-84页

作者：顾闫悦江梅张忠涛李好王宗爽中国环境科学研究院北京100012 国家林业和草原局产业发展规划院北京100010

胶合板是我国人造板类产品生产和消费的主要板种,在其生产过程需要使用大量胶黏剂,属于VOCs排放的典型行业。劳动密集型的生产模式和粗放的管理模式,导致胶合板行业的VOCs污染问题突出,因而亟须强化VOCs全流程、全环节综合治理。围绕“... 详细信息

胶合板是我国人造板类产品生产和消费的主要板种,在其生产过程需要使用大量胶黏剂,属于VOCs排放的典型行业。劳动密集型的生产模式和粗放的管理模式,导致胶合板行业的VOCs污染问题突出,因而亟须强化VOCs全流程、全环节综合治理。围绕“空气质量持续改善”目标和“双碳”目标,分析胶合板行业VOCs治理的关键共性问题,并以清洁生产审核为抓手,建立了一套涵盖原材料采购、储存、处理到产品生产的VOCs全过程清洁生产整治提升方案。建议推广清洁生产整体审核模式,鼓励无醛胶黏剂源头替代,全面推行VOCs无组织排放过程控制,以及推进VOCs深度治理和碳协同减排技术应用,促进胶合板行业绿色低碳高质量发展。

关键词：胶合板挥发性有机物(VOCs) 甲醛清洁生产全过程

红细胞与纤维蛋白成分在急性缺血性脑卒中患者血栓中的占比分析及其对预后的影响

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中国现代医学杂志 2025年第1期35卷 9-14页

作者：罗根培胡伟东钟望涛广东医科大学研究生学院广东湛江524000 东莞市人民医院神经内科广东东莞523000 广东医科大学附属医院神经内科广东湛江524000

目的探讨红细胞与纤维蛋白成分在急性缺血性脑卒中患者血栓中的占比对预后的影响。方法选取2021年1月—2024年1月东莞市人民医院接诊的102例急性缺血性脑卒中患者为研究对象,均给予机械取栓手术治疗,术后参考改良脑梗死溶栓(mTICI)分级... 详细信息

目的探讨红细胞与纤维蛋白成分在急性缺血性脑卒中患者血栓中的占比对预后的影响。方法选取2021年1月—2024年1月东莞市人民医院接诊的102例急性缺血性脑卒中患者为研究对象,均给予机械取栓手术治疗,术后参考改良脑梗死溶栓(mTICI)分级评估血管再通情况分为预后良好组(66例)与预后不良组(36例)。比较两组的围手术期改良Rankin量表(mRS)评分、C反应蛋白(CRP)、中性粒细胞/淋巴细胞、同型半胱氨酸、高纤维蛋白/血小板血栓、高红细胞血栓。采用多因素逐步Logistic回归模型分析急性缺血性脑卒中患者预后不良的影响因素。结果术后24 h、出院前,预后不良组的mRS评分高于预后良好组(P<0.05)。预后不良组患者的CRP水平、中性粒细胞/淋巴细胞比值、同型半胱氨酸水平均高于预后良好组(P<0.05)。预后不良组高纤维蛋白/血小板血栓占比高于预后良好组(P<0.05),高红细胞血栓占比低于预后良好组(P<0.05)。多因素逐步Logistic回归分析结果显示,CRP水平高[OR=3.702(95%CI:1.607,8.529)]、中性粒细胞/淋巴细胞比值高[OR=3.615(95%CI:1.569,8.327)]、同型半胱氨酸水平高[OR=4.076,95%CI:1.769,9.389)]、高纤维蛋白/血小板血栓[OR=3.741(95%CI:1.623,8.615)]均是急性缺血性脑卒中患者预后不良的危险因素(P<0.05)。结论血栓中高纤维蛋白/血小板组分与急性缺血性脑卒中患者的不良预后密切相关。

关键词：急性缺血性脑卒中血栓成分预后

Transition Metal Catalyzed Direct Oxidative Borylation of C--H Bonds

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Chinese Journal of Chemistry 2018年第10期36卷 950-954页

作者： zhong-tao Jiang Bi-qin Wang Zhang-Jie Shi College of Chemistry and Materials Science Sichuan Normal University Chengdu Sichuan 610068 China Department of Chemistry Fudan University Shanghai 200433 China

Organoboron is well-developed and broadly utilized organometallic reagents in organic synthesis due to its extraordinary performances in transition-metal catalyzed C-C and C-X bonds construction. Catalytic C--H borylation and further transformations catalyzed by transition metal catalysts in the absence of oxidants were well studied in decades. However, as known, transition metal catalyzed oxidative C-H borylations were not reviewed up to date. In this article the oxidative borylation of C（sp2）-H and C（sp3）-H bonds were summarized and their mechanisms were also accounted.

关键词： C-H borylation oxidation organoboron transition metal catalysis

Role of abdominal drainage in bariatric surgery: Report of six cases

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World Journal of Clinical Cases 2019年第16期7卷 2336-2340页

作者： Yang Liu Meng-Yi Li zhong-tao Zhang Department of General Surgery Beijing Friendship Hospital Capital Medical University

BACKGROUND Abdominal drainage allows for timely detection of hemorrhage,but it cannot prevent *** routine abdominal drainage is needed during bariatric procedures remains *** reports describe the role of abdominal drainage in the diagnosis and treatment of abdominal hemorrhage in bariatric *** SUMMARY Six cases of hemorrhage after bariatric surgery were described,including three cases with and three without abdominal drainage during the first *** hemorrhage in five of the six cases was controlled by conservative *** hemorrhage was found through the drainage tube on the day of the operation in the three patients with abdominal drainage during the first *** treatment was initiated,and their conditions gradually stabilized within 48 *** patients required a *** hemorrhage was found later in the patients without abdominal *** the hemorrhage was controlled by conservative treatment in two cases (1 and 2),reoperation and percutaneous drainage were performed for abdominal infection and pelvic *** obsolete encapsulated effusion that may require treatment in the future was left in the abdominal cavity of a patient (Case 1).CONCLUSION The possibility of controlling abdominal hemorrhage after bariatric/metabolic surgery by conservative treatment is *** hemorrhage occurs,abdominal drainage can reduce the probability of reoperation by reducing the formation of blood clots behind the stomach.

关键词： Abdominal drainage Morbid obesity Bariatric surgery Hemorrhage Case report

Long-term photometric behavior of the eclipsing Z Cam-type dwarf nova AY Psc

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Research in Astronomy and Astrophysics 2017年第6期17卷 67-76页

作者： zhong-tao Han Sheng-Bang Qian Irina Voloshina Li-Ying Zhu Yunnan Observatories Chinese Academy of Sciences Kunming 650216 China Key Laboratory of the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650216 China University of Chinese Academy of Sciences Beijing 100049 China Sternberg Astronomical Institute Moscow State University Universitetskij prospect 13 Moscow 119992 Russia

New eclipse timings of the Z Cam-type dwarf nova AY Psc were measured and the orbital ephemeris was revised. In addition, based on long-term AAVSO data, the outburst behaviors were also explored. Our analysis suggests that normal outbursts are quasi-periodic, with an amplitude of 2.5（4-0.1） mag and a period of - 18.3（4-0.7） d. The amplitude vs. recurrence-time relation ofAY Psc is discussed, and we conclude that this relation may represent general properties of dwarf nova outbursts. The observed standstill ends with an outburst, which is inconsistent with the general picture of Z Cam- type stars. This unusual behavior was considered to be related to mass-transfer outbursts. Moreover, the average luminosity Is brighter during standstills than during outburst cycles. The changes in brightness mark variations in M2 due to the fact that the disk of AY Psc is nearly steady state.M2 value was limited to the range from 6.35 × 10-9 to 1.18 × 10-8 M yr-1. More detailed examination shows that there are a few small outbursts present during standstills. These events with amplitudes of - 0.5 - 0.9 mag are very similar to the stunted outbursts reported in some nova-like cataclysmic variables. We discussed several possible mechanisms and suggested that the most reasonable mechanism for these stunted outbursts is a changing mass-transfer rate.

关键词： binaries close - stars cataclysmic variables - stars individual (AY Psc)

Clayey soil stabilization using alkali-activated volcanic ash and slag

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第2期14卷 576-591页

作者： Hania Miraki Nader Shariatmadari Pooria Ghadir Soheil Jahandari zhong tao Rafat Siddique Department of Civil Engineering Iran University of Science and TechnologyTehranIran Centre for Infrastructure Engineering Western Sydney UniversityPenrithNSW2751Australia Thapar Institute of Engineering and Technology PatialaIndia

Lime and Portland cement are the most widely used binders in soil stabilization ***,due to the high carbon emission in cement production,research on soil stabilization by the use of more environmentally-friendly binders with lower carbon footprint has attracted much attention in recent *** research investigated the potential of using alkali-activated ground granulated blast furnace slag(GGBS)and volcanic ash(VA)as green binders in clayey soil stabilization projects,which has not been studied *** effects of different combinations of VA with GGBS,various liquid/solid ratios,different curing conditions,and different curing periods(i.e.7 d,28 d and 90 d)were *** strength and durability of specimens against wet-dry and freeze-thaw cycles were then studied through the use of mechanical and microstructural *** results demonstrated that the coexistence of GGBS and VA in geopolymerization process was more effective due to the synergic formation of N-A-S-H and C-(A)-S-H ***,although VA needs heat curing to become activated and develop strength,its partial replacement with GGBS made the binder suitable for application at ambient temperature and resulted in a remarkably superior resistance against wet-dry and freeze-thaw *** carbon embodied of the mixtures was also evaluated,and the results confirmed the low carbon footprints of the alkali-activated ***,it was concluded that the alkali-activated GGBS/VA could be promisingly used in clayey soil stabilization projects instead of conventional binders.

关键词： Soil stabilization Alkali-activated material Volcanic ash(VA) Ground granulated blast furnace slag(GGBS) Curing condition Durability