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Research Square 2021年

作者： Zhou, Honggen Yang, Weibin Sun, Li Jing, xuwen Li, Guochao cao, Liping School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212000 China Shaanxi Diesel Engine Heavy Industry Company Limited Xingping713100 China

The processing quality of the block hole system affects the working performance of the marine diesel engine block directly. Choosing an appropriate combination of process parameters is a prerequisite to improve the accuracy of the block hole system. Uncertain fluctuations of process parameters during the machining process would affect the process reliability of the block hole system, resulting in an ultra-poor accuracy. For this reason, the RBF method is used to establish the relationship between the verticality of the cylinder hole and process parameters, including cutting speed, depth of cut, and feed rate. Taking the minimum cylinder hole verticality as the goal and setting the process reliability constraints of the cylinder hole based on Monte Carlo, a reliability optimization model of processing parameters for cylinder hole is established in this paper. Meanwhile, an improved particle swarm algorithm was designed to solve the model, and eventually, the global optimal combination of process parameters for the cylinder hole processing of the diesel engine block in the reliability stable region was obtained. © 2021, CC BY.

关键词： Reliability

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新时代中国适应体育教师专业化演变与再思考

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四川体育科学 2021年第1期40卷 123-127,140页

作者：彭续文曹烃江西师范大学体育学院江西南昌330000

采用文献资料法、逻辑分析法等对习近平新时代体育思想背景下中国适应体育教师专业化的演变与再思考进行分析,阐述了我国适应体育教师专业化进程及相关法规与政策的重要节点信息。主要结论:新时代体育思想背景下适应体育教师的专业化发... 详细信息

采用文献资料法、逻辑分析法等对习近平新时代体育思想背景下中国适应体育教师专业化的演变与再思考进行分析,阐述了我国适应体育教师专业化进程及相关法规与政策的重要节点信息。主要结论:新时代体育思想背景下适应体育教师的专业化发展是我国适应体育的新发展趋势;社会大众缺乏对适应体育及教师的认识和理解、适应体育教育制度制定有待完善、特殊学校缺乏对适应体育教师的鼓励与支持、适应体育教师自身缺乏内在动力是阻碍我国适应体育教师专业化进程主要因素。建议:我国适应体育教师专业化进程需健全适应体育教育的认知系统、建立适应体育教师资格认证制度、完善适应体育教师职前教育模式、改善适应体育教师继续教育模式。

关键词：适应体育教师新时代专业化演变思考

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Process Knowledge Graph Modeling Techniques and Application Methods for Ship Heterogeneous Models

Research Square

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Research Square 2021年

作者： Liu, Jinfeng Dong, Jianwei Jing, xuwen cao, Xuwu Du, Chenxiao Li, Lei School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212100 China

In the process design and reuse of marine component products, there are a lot of heterogeneous models, causing the problem that the process knowledge and process design experience contained in them are difficult to express and reuse. Therefore, a process knowledge representation model for ship heterogeneous model is proposed in this paper. Firstly, the multi-element process knowledge graph is constructed, and the heterogeneous ship model is described in a unified way. Then, the multi-strategy ontology mapping method is applied, and the semantic expression between the process knowledge graph and the entity model is realized. Finally, by obtaining implicit semantics based on case-based reasoning and checking the similarity of the matching results, the case knowledge reuse is achieved, to achieve rapid design of the process. This method provides reliable technical support for the design of ship component assembly and welding process, greatly shortens the design cycle, and improves the working efficiency. In addition, a case study of the test model is carried out to verify the feasibility and efficiency of the proposed method. © 2021, CC BY.

关键词： Case based reasoning

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竖向分布筋不连接装配式剪力墙抗震性能试验研究

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建筑结构 2021年第17期51卷 5-9,24页

作者：肖绪文曹志伟刘星廖显东同济大学土木工程学院建筑工程系上海200092 中国建筑股份有限公司北京100029 中国建筑第八工程局工程研究院上海200135 清华大学土木水利学院北京100084

为解决如今装配式剪力墙安装过程中竖向钢筋接头数量多导致的安装难等问题,提出了一种新型竖向分布筋不连接装配式剪力墙(简称SGBL装配式剪力墙),其主要特点为墙体竖向分布钢筋断开连接,边缘构件主筋根据本文提出的等承载力设计方法进... 详细信息

为解决如今装配式剪力墙安装过程中竖向钢筋接头数量多导致的安装难等问题,提出了一种新型竖向分布筋不连接装配式剪力墙(简称SGBL装配式剪力墙),其主要特点为墙体竖向分布钢筋断开连接,边缘构件主筋根据本文提出的等承载力设计方法进行加大以弥补抗弯承载力的损失。为研究SGBL装配式剪力墙墙体抗震性能,开展了4片足尺剪力墙试件的低周往复试验,包括两片现浇对比剪力墙试件以及两片SGBL装配式剪力墙试件。试验结果表明:SGBL装配式剪力墙试件破坏形态与现浇对比剪力墙试件基本相同,采用本文提出的等承载力设计方法后,SGBL装配式剪力墙承载力与现浇剪力墙基本一致。同时SGBL装配式剪力墙耗能能力好于现浇剪力墙,表明这种SGBL装配式剪力墙不仅可以解决连接接头数量过多所导致的安装难问题,且在不削弱抗震性能的同时具备较高的经济价值。

关键词：装配式剪力墙竖向分布钢筋等承载力设计方法抗震性能

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Phytoplankton community changes in a coastal upwelling system during the last century

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Global and Planetary Change 2023年 224卷

作者： Peng, Peng Bi, Rong Sachs, Julian P. Shi, Jie Luo, Yifei Chen, Weifang Huh, Chih-An Yu, Meng cao, Yali Wang, Yaoyao cao, Zhong Bao, Xiaohan Guo, Xinyu Li, Huijuan Feng, xuwen Li, Hongchun Zhao, Meixun Frontiers Science Center for Deep Ocean Multispheres and Earth System and Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China Laoshan Laboratory Qingdao266237 China School of Oceanography University of Washington Box 355351 SeattleWA98195 United States Key laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Qingdao266100 China State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences Xiamen University Xiamen361102 China Institute of Earth Sciences Academia Sinica Taipei11529 Taiwan Yantai Maritime Safety Administration Yantai264000 China Jinan250014 China Second Institute of Oceanography Ministry of Natural Resources of People's Republic of China Hangzhou310012 China Department of Geosciences National Taiwan University Taipei10617 Taiwan

Phytoplankton communities in coastal upwelling systems are influenced by the interplay between human-induced and natural climate forcing that vary regionally and the two factors have not been well quantified. Combining lipid biomarker analyses in 23 sediment cores from the Zhejiang coast of the East China Sea and a physical-ecological model, we found that during the 1960s–2000s there was a 42 ± 4% increase in diatom proportions and a 17 ± 8% decrease in dinoflagellate proportions within the core upwelling area that is attributed to changes in Kuroshio Current transport and coastal upwelling. During the 1950s–2000s there was a 16 ± 8% increase in dinoflagellate proportions and 12 ± 4% decrease in diatom proportions outside the core upwelling area which is attributed to anthropogenic nutrient inputs and climate warming. Our results provide a novel approach to quantify mechanisms of past and future changes in marine phytoplankton communities. © 2023 Elsevier B.V.

关键词： Ocean currents

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Observation of Dirac nodal line states in topological semimetal candidate PrSbTe

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Physical Review B 2024年第4期109卷 045113-045113页

作者： Dengpeng Yuan Dajian Huang Xin Ma Xu Chen Huifen Ren Yun Zhang Wei Feng Xiegang Zhu Bo Wang xuwen He Jian Wu Shiyong Tan Qunqing Hao Qiang Zhang Yi Liu Qin Liu Zhengtai Liu Chao cao Qiuyun Chen Xinchun Lai Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907 China Center for Correlated Matter and School of Physics Zhejiang University Hangzhou 310058 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China

The interplay among topology, crystal symmetry, magnetic order, and strong electron correlation can give rise to a plethora of exotic physical phenomena. The ZrSiS family is known as typical topological Dirac semimetals, among them LnSbTe (Ln denotes lanthanide) compounds exhibit intriguing characteristics due to the presence of Ln 4f electrons, resulting in quantum states and unique properties. In this paper, the topological electronic structure of PrSbTe is systematically studied by angle-resolved photoemission spectroscopy (ARPES), combined with magnetic, specific heat measurements, and band structure calculations. The detailed three-dimensional electronic structure of PrSbTe has been obtained, and a diamond-shaped Fermi surface and multiple Dirac nodal lines have been observed, which are in remarkable agreement with theoretical calculations. Moreover, the 4f electrons in PrSbTe are rather localized, which can be revealed by on-resonant ARPES data and further confirmed by the rather small Sommerfeld coefficient of γ=2.6231mJ/molK2. Our results provide more detailed information about the LnSbTe family, which gives a deeper understanding of the interaction between Ln 4f electrons and the topological states.

关键词： Electronic structure Fermi surface Topological materials Dirac semimetal Node-line semimetals Angle-resolved photoemission spectroscopy Magnetic techniques Specific heat measurements

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氨氮胁迫对翘嘴鳜幼鱼鳃、消化道酶活力的影响

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南方水产科学 2020年第3期16卷 31-37页

作者：丁炜东曹丽萍曹哲明邴旭文中国水产科学研究院淡水渔业研究中心/农业农村部淡水渔业和种质资源利用重点实验室江苏无锡214081

为揭示翘嘴鳜(Siniperca chuatsi)幼鱼对氨氮胁迫的生理变化,以体质量(13.31±0.49)g、体长(9.73±0.46)cm的翘嘴鳜幼鱼为实验鱼,研究了在水温(22.0±0.5)℃下、48.65 mg·L-1氨氮胁迫对其鳃和消化道相关酶活力的影响... 详细信息

为揭示翘嘴鳜(Siniperca chuatsi)幼鱼对氨氮胁迫的生理变化,以体质量(13.31±0.49)g、体长(9.73±0.46)cm的翘嘴鳜幼鱼为实验鱼,研究了在水温(22.0±0.5)℃下、48.65 mg·L-1氨氮胁迫对其鳃和消化道相关酶活力的影响。结果表明,在氨氮胁迫下翘嘴鳜幼鱼处于应激状态并引起Na+/K+-ATP酶、呼吸代谢酶和消化酶活力水平显著变化。其中Na+/K+-ATP酶活力与对照组差异显著,先升高再降低;呼吸代谢酶活力呈升高趋势;对胃囊和消化道中的消化酶也有显著影响,其中淀粉酶(AMS)呈降低-升高的趋势,胃蛋白酶和脂肪酶(LPS)呈升高-降低的趋势。综上,氨氮胁迫会对翘嘴鳜幼鱼产生损害,使其呼吸代谢功能下降,鳃的呼吸功能受损,机体诱导消化酶与无氧代谢酶活力升高为机体抗应激反应提供能量。

关键词：翘嘴鳜幼鱼氨氮胁迫呼吸代谢酶消化酶酶活力

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A Power Take-Off Device With an HTS Synchronous Reluctance Linear Generator

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IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 2020年第8期30卷 1页

作者： Jing, Hailian cao, Bin Zou, Yutong Izumi, Mitsuru Maki, Naoki Chen, xuwen Xu, Peng Chengdu Univ Technol Coll Nucl Technol & Automat Engn Chengdu 610059 Peoples R China Tokyo Univ Marine Sci & Technol Grad Sch Marine Sci & Technol Tokyo 1358533 Japan

To utilize wave energy, we propose a power take-off device mainly composed of a novel buoy and a high-temperature superconducting synchronous reluctance linear generator (HTS-SRLG). We describe the conceptual structure and function of the buoy, which makes use of seawater to provide more power to the HTS-SRLG. Then, we introduce the configuration and the key electrical design process of the HTS-SRLG. Design result of the HTS-SRLG is presented and compared with that of counterparts to demonstrate its advantages in performance and in application. This article is conducted from the viewpoint of promoting the industrial application of HTS machines. The proposed buoy gives an insight of improving the utilizing efficiency of wave energy. And the HTS-SRLG contributes to simplify the generator cooling.

关键词： Buoy electrical design high-temperature superconductor (HTS) synchronous reluctance generator wave energy

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浙江知识产权公共服务数字化集成平台设计与研究

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中国科技纵横 2024年第6期 26-29页

作者：张潞璐曹杭平黄健民朱明陈旭文傅潇杭国家市场监管技术创新中心(市场监管数字化研究与应用) 浙江杭州 310000 浙江省标准化研究院浙江杭州 310000

建设知识产权公共服务数字化集成平台是深化知识产权服务事项改革的重要方式,为进一步提升浙江知识产权公共服务数字化集成水平,以"知识产权在线"为例,充分运用"互联网+知识产权"、大数据和信息化技术,分析建设背... 详细信息

建设知识产权公共服务数字化集成平台是深化知识产权服务事项改革的重要方式,为进一步提升浙江知识产权公共服务数字化集成水平,以"知识产权在线"为例,充分运用"互联网+知识产权"、大数据和信息化技术,分析建设背景与实际需求,提出浙江融合优化知识产权各类资源和服务的知识产权平台设计与建设方式,为全国类似平台的功能设计以及服务能力和效率的提升提供经验借鉴.

关键词：知识产权集成公共服务数字化

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Ladderane records over the last century in the East China sea: Proxies for anammox and eutrophication changes

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WATER RESEARCH 2019年第Jun.1期156卷 297-304页

作者： Zhao, Zongshan cao, Yali Fan, Ying Yang, Haili Feng, xuwen Li, Li Zhang, Hailong Xing, Lei Zhao, Meixun Ocean Univ China Inst Adv Ocean Study Minist Educ Key Lab Marine Chem Theory & Technol Qingdao 266100 Shandong Peoples R China Qingdao Natl Lab Marine Sci & Technol Lab Marine Ecol & Environm Sci Qingdao 266237 Shandong Peoples R China Chinese Acad Sci Qingdao Inst Bioenergy & Bioproc Technol CAS Key Lab Biobased Mat Qingdao 266101 Shandong Peoples R China Jiangxi Inst Anal & Test Nanchang 330029 Jiangxi Peoples R China State Ocean Adm Inst Oceanog 2 Hangzhou 310012 Zhejiang Peoples R China

Anaerobic ammonium oxidation (anammox), an important process for converting fixed nitrogen to N-2, plays an important role in the present-day marine nitrogen cycle. However, little is known about anammox activities in the past, especially in regions that were strongly affected by human activities, evidenced by eutrophication and hypoxia, which promote anammox bacteria growth. In this study, ladderanes have been measured in a sediment core and suspended particulate matter (SPM) in the East China Sea (ECS), to reconstruct the anammox record and to evaluate its responses to eutrophication and hypoxia. The detection and distribution of different ladderane lipids in SPM provide additional evidence that ladderanes were mostly produced in the water column and could reflect anammox activities. Summed ladderane content from the core varied between 11 and 300 ng/g dry weight (dw) sediment, with C20-[5]-ladderane fatty acid methyl esters (FAME) as the predominant compound (5-150 ng/g dw), followed by C20-[3]-ladderane FAME (1-110 ng/g dw), C18-[3]-ladderane FAME (1-32 ng/g dw) and 08 -[5]-ladderane FAME (3-11 ng/g dw). The detection of ladderanes over the last century indicate the existence of anammox in the past. The rapidly increasing trend of ladderanes since the 1960s correlates with an increase in phytoplankton biomarkers (2 Sigma(B + D + A), brassicasterol (B), dinosterol (D) and C-37 alkenones (A)), indicating that eutrophication exacerbated anammox growth. The co-variation between our ladderane record and published records of low-oxygen tolerant foraminiferal microfossils and hypoxia events over the past 60 years suggested that sediment ladderanes are a useful indicator for past changes of oxygen depletion or hypoxia in the ECS. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： Anammox Ladderanes Nitrogen cycle Phytoplankton Hypoxia

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