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10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang Xiang‑biao Qiu Zhen Chen Mao‑Yuan Zhao Chang‑Jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang Xiao‑yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He yang Hong Yi‑Wei Hu Han‑Xiong Huang Wei Jiang Zhi‑Jie Jiang zheng‑Yao Jin Ling Kang Bo Li Gong Li Xiao Li yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan Zhao‑Hui Song Kang Sun Zhi‑Xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang Xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China China Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China China Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification

Controllably Growing Topologies in One-shot RAFT Polymerization via Macro-latent Monomer Strategy

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Chinese Journal of Polymer Science 2021年第1期39卷 60-69,I0006页

作者： Liu-Qiao Zhang yang Gao Zhi-Hao Huang Wei Zhang Nian-Chen Zhou zheng-biao Zhang Xiu-Lin Zhu State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Global Institute of Software Technology Suzhou 215163China

The controlled and efficient synthesis of polymers with tailored topologies is challenging but important for exploring structure/property research. Herein, we proposed a concept of macro-latent monomer to achieve the controlled growth of polymer *** macro-latent monomer was installed by a dynamic furan/maleimide covalent bond at the chain terminal. One-shot reversible additionfragmentation chain transfer(RAFT) polymerization of styrene and the macro-latent monomer created controlled growth of polymer *** temperature such as 40 ℃ could not activate the macro-latent monomer and thus the polymerization created the homo-polystyrene. By contrast, high temperature of ~110 ℃ activated the macro-latent monomer, and a maleimide-terminated macro-monomer was released via the retro-Diels Alder reaction. This macro-monomer immediately joined the cross polymerization with styrene and thus produced the side chains. By delicately manipulating the polymerization temperature, the predetermined placement of the macro-latent monomer-derived polymeric sidechains created controllably growing topologies, including star-, π-shaped, and density-variable grafting copolymers. This work paved a new way for creating on-demand topologies and would greatly enrich the topology synthesis.

关键词： Latent monomer Diels-Alder reaction Maleimide Styrene Topologies

GA_(3)和KNO_(2)引发处理对水稻芽期生长、淀粉及呼吸代谢的影响

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中国稻米 2024年第3期30卷 40-47,52页

作者：谭彪任慕瑶杨正鹏徐佳依郑华斌唐启源王慰亲湖南农业大学农学院长沙410128

种子引发作为一种播前处理技术,其对种子萌发和幼苗生长的促进作用已被广泛报道,赤霉素(GA_(3))和亚硝酸钾(KNO_(2))均参与调控种子发芽过程。但是,GA_(3)引发和KNO_(2)引发对水稻种子萌发出苗及相关生理代谢过程的影响及其复合效应尚... 详细信息

种子引发作为一种播前处理技术,其对种子萌发和幼苗生长的促进作用已被广泛报道,赤霉素(GA_(3))和亚硝酸钾(KNO_(2))均参与调控种子发芽过程。但是,GA_(3)引发和KNO_(2)引发对水稻种子萌发出苗及相关生理代谢过程的影响及其复合效应尚不清楚。本研究以常规稻湘早籼45号和杂交稻株两优4024为供试品种,在生长箱条件下,以非引发处理为对照(CK),探究水引发(HP)、赤霉素引发(GA3)、亚硝酸钾引发(KNO2)和复合引发(GA3+KNO2)处理对水稻种子萌发、幼苗生长、淀粉降解代谢和呼吸代谢的影响。结果表明,与CK相比,不同引发处理均显著提升了种子发芽指数和活力指数,增强了幼苗素质,且GA3引发和KNO2引发的促进作用要优于HP引发;同时,GA_(3)引发和KNO_(2)引发较CK和HP引发显著提升了种子萌发过程中的α-淀粉酶活性和可溶性糖含量,一定程度增加了呼吸耗氧速率、腺苷三磷酸(ATP)含量和糖酵解限速酶活性,且两种引发处理间存在一定协同效应;但引发处理对无氧呼吸代谢酶活性的影响规律不明显。以上结果表明,GA3引发和KNO2引发处理显著促进了水稻芽期生长,其原因可能与淀粉降解能力和呼吸代谢活性提升有关,然而,未来仍需进一步研究揭示GA3引发和KNO2引发影响淀粉降解和呼吸代谢的生理生化和分子机理。

关键词：水稻种子引发赤霉素亚硝酸钾芽期生长

维普期刊数据库博看期刊

Recycling of crustal materials and implications for lithospheric thinning: Evidence from Mesozoic volcanic rocks in the Hailar-Tamtsag Basin, NE China

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Geoscience Frontiers 2021年第5期12卷 149-165页

作者： zheng Ji Yan-Long Zhang Chuan-biao Wan Wen-Chun Ge Hao yang Yu Dong Yan Jing College of Earth Sciences Jilin UniversityChangchun 130061China Exploration and Development Research Institute Daqing Oilfield Limited CompanyDaqing 163712China

Late Mesozoic Nb-rich basaltic andesites and high-Mg adakitic volcanic rocks from the Hailar-Tamtsag Basin,northeast China,provide important insights into the recycling processes of crustal materials and their role in late Mesozoic lithospheric *** Late Jurassic Nb-rich basaltic andesites(154±4 Ma)are enriched in large-ion lithophile and light rare earth elements,slightly depleted in high-field-strength elements,and have high TiO_(2),P_(2)O_(5),and Nb contents,and(Nb/Th)PM and Nb/U ratios,which together with the relatively depleted Sr-Nd-Hf isotopic compositions indicate a derivation from a mantle wedge metasomatized by hydrous melts from subducted oceanic *** Early Cretaceous high-Mg adakitic volcanic rocks(129-117 Ma)are characterized by low Y and heavy rare earth element contents,and high Sr contents and Sr/Y ratios,similar to those of rocks derived from partial melting of an eclogitic *** also have high Rb/Sr,K_(2)O/Na_(2)O,and Mg#values,and high MgO,Cr,and Ni *** geochemical features suggest that the adakitic lavas were derived from partial melting of delaminated lower continental crust,followed by interaction of the resulting melts with mantle material during their *** data,along with available geological,paleomagnetic,and geophysical evidence,lead us to propose that recycling of Paleo-Pacific oceanic crustal materials into the upper mantle due to flat-slab subduction and rollback of the Paleo-Pacific Plate during the late Mesozoic likely provided the precondition for lithospheric thinning in northeast China,with consequent lithospheric delamination causing recycling of continental crustal materials and further lithospheric thinning.

关键词： Late Mesozoic Lithospheric thinning Hailar-Tamtsag Basin Paleo-Pacific Plate Volcanic rock

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多轴线运输车的模块化设计方法研究

机械设计与制造 2024年第7期 310-316页

作者：罗澄清赵登标张瑞亮范政武太原城市职业技术学院机电工程系山西太原030027 太原理工大学车辆工程系山西太原030024 山西省汽车设计工程技术研究中心山西太原030024

目前多轴线运输车存在设计周期长、生产制造困难等问题。为了对此类轴线车进行快速开发,在分析现有模块划分方法的基础上,引入复杂网络理论,开展针对多轴线运输车的模块化设计方法研究。首先从零部件间的几何、功能及设计变更三个角度... 详细信息

目前多轴线运输车存在设计周期长、生产制造困难等问题。为了对此类轴线车进行快速开发,在分析现有模块划分方法的基础上,引入复杂网络理论,开展针对多轴线运输车的模块化设计方法研究。首先从零部件间的几何、功能及设计变更三个角度分析评价多轴线运输车零部件之间的关联强度,然后采用基于七标度法则的区间层析分析法(IAHP)确定三个相关属性权重大小,并建立产品零部件综合复杂网络模型。在此基础上,采用Louvain算法进行该网络的社区发现,从而得到多轴线运输车模块划分方案,与GN算法、LPA算法、FCM算法相比,采用Louvain算法能更有效地对轴线车进行模块划分。基于模块化理论对多轴线运输车的设计进行研究,能够实现此轴线车的快速设计,为轴线车的优化升级奠定了基础。

关键词：多轴线运输车模块划分区间层次分析法 Louvain算法

Investigating effects of nano-particles infiltrat

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Science China(Physics,Mechanics & Astronomy) 2012年第6期55卷 989-995页

作者： ZHANG XiaoYue ZHANG Yong zheng Yue WANG biao School of Engineering Sun Yat-sen University Guangzhou 510275 China State Key Laboratory of Optoelectronic Materials and Technologies/Institute of Optoelectronic and Functional Composite Materials School of Physics and Engineering Sun Yat-sen University Guangzhou 510275 China

In this paper,we introduce our finding of the effects of C_(60) nanoparticles (NP) infiltration on mechanical properties of cell and its *** force microscopy (AFM) is used to perform indentation on both normal and C_(60) infiltrated red blood cells (RBC) to gain data of mechanical characteristics of the *** results show that the mechanical properties of human RBC membrane seem to be altered due to the presence of C_(60) *** resistance and ultimate strength of the C_(60) infiltrated RBC membrane significantly *** also explain the mechanism of how C_(60) NPs infiltration changes the mechanical properties of the cell membrane by predicting the structural change of the lipid bilayer caused by the C_(60) infiltration at molecular level and analyze the interactions among molecules in the lipid *** potential hazards and application of the change in mechanical characteristics of the RBCs membrane are also *** of C_(60) NPs may be significant for some biological cells.

关键词： human red blood cell mechanical properties C_(60) nano-particles infiltration atomic force microscope

Synthesis of Sulfur/Selenium-containing Polyester with Recyclability and Controllable Hydrophilicity and Glass Transition Temperature

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Chinese Journal of Polymer Science 2023年第12期41卷 1836-1845,I0004,I0005页

作者： Wen-Jing Li Xiang-Qiang Pan Jian Zhu zheng-biao Zhang Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

We present a ring-opening polymerization of bridged cyclic lactone utilizing alcohol as the initiator and organic base as the *** γ-butyrolactone monomers(PhSGBL and PhSeGBL)were synthesized efficiently from commercially available 3-cyclohexene-1-carboxylic *** to the ring strain of the bridged structure,ring-opening polymerization of this type of γ-butyrolactone derivative was successfully carried out under mild conditions,e.g.,using ethylene glycol as the initiator and a commercial catalyst[1,5,7-triazabicyclo[4.4.0 dec-5-ene(TBD)]]as the catalyst at 30℃.The obtained polymer could be degraded to its monomer for recycling in the presence of ZnCl_(2) as a *** and PhSeGBL could also be copolymerized with ε-caprolactone to tune the glass transition ***,the hydrophilicity of the obtained sulfur-containing polymers could be adjusted by selectively oxidizing the thioether side group to sulfone/sulfoxide,which offered a way to tune the hydrophilicity of *** the other hand,the obtained selenium-containing compound could be degraded in the presence of m-CPBA(3-chloroperbenzoic acid),which offered potential application in sustained drug release.

关键词： Ring-opening polymerization Polyester Closed-loop recycling Selective oxidation

Acceptance of Chemo-prophylaxis for Latent Tuberculosis Infection among High School/College Student Contacts of Tuberculosis Patients in Shanghai, China

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Biomedical and Environmental Sciences 2018年第4期31卷 317-321页

作者： LI yang zheng Yi Hui LU Li Ping yang Mei Xia ZHOU Chang Ming YUAN zheng An HU Yi XU biao Department of Epidemiology and Key Laboratory of Public Health Safety (Ministry of Education) School of Public Health Fudan University Shanghai 200032 China Putuo District Center for Disease Control and Prevention Shanghai 200333 China Songjiang District Center for Disease Control and Prevention Shanghai 201620 China Xuhui District Center for Disease Control and Prevention Shanghai 200237 China Shanghai Center for Disease Control and Prevention Shanghai 200336 China Department of Public Health Sciences Karolinska Institutet Stockholm 17177 Sweden

Student contacts of tuberculosis（TB）cases are susceptible to latent tuberculosis infection（LTBI）,and chemo-prophylaxis can reduce the risk of active TB among *** study aimed to assess the acceptance of chemo-proph... 详细信息

关键词： In China Acceptance of Chemo-prophylaxis for Latent Tuberculosis Infection among High School/College Student Contacts of Tuberculosis Patients in Shanghai

DAAM/ADH 接枝交联复合改性淀粉木材胶黏剂的制备及表征

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现代化工 2024年第S2期44卷 161-165页

作者：吴栋栋程力马丕明洪雁顾正彪江南大学化学与材料工程学院江苏无锡214122 江南大学食品科学与技术国家重点实验室江苏无锡214122 江南大学食品学院江苏无锡214122

以硝酸铈铵(CAN)为引发剂,将双丙酮丙烯酰胺(DAAM)接枝到玉米淀粉上,通过DAAM的酮羰基(C=O)与己二酸二酰肼(ADH)间的酮肼交联反应,制备了DAAM/ADH接枝交联复合改性淀粉胶黏剂。通过胶黏剂的接枝率、接枝单体分布以及刨花板性能确定了最... 详细信息

以硝酸铈铵(CAN)为引发剂,将双丙酮丙烯酰胺(DAAM)接枝到玉米淀粉上,通过DAAM的酮羰基(C=O)与己二酸二酰肼(ADH)间的酮肼交联反应,制备了DAAM/ADH接枝交联复合改性淀粉胶黏剂。通过胶黏剂的接枝率、接枝单体分布以及刨花板性能确定了最佳DAAM添加量,利用FT-IR、TGA和SEM表征了接枝和交联改性对胶黏剂性能与结构的影响。结果表明,当DAAM添加量为45 g时效果最佳,接枝率为16.75%,DAAM在淀粉上的分布最均匀,制备的刨花板断裂模量为10.56 MPa,弹性模量为1741.33 MPa,吸水厚度膨胀率为8.5%,接枝和交联反应成功进行,并且提高了胶黏剂的储藏稳定性、抵抗破坏的能力和热稳定性。

关键词：淀粉胶黏剂双丙酮丙烯酰胺己二酸二酰肼接枝共聚酮肼交联