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聚乙烯醇纤维改性混凝土及抗盐蚀研究

盐科学与化工 2024年第1期53卷 38-42页

作者：贾青杨凌职业技术学院陕西杨凌712100

针对普通混凝土耐久性和抵抗恶劣环境差的问题,提出通过聚乙烯醇纤维对混凝土进行改性,并研究了纤维对混凝土的改性效果。试验结果表明,当聚乙烯醇纤维掺量为12%时(PVA12样品),混凝土坍落度较基础混凝土下降了约45%。在28 d龄期,PVA12... 详细信息

针对普通混凝土耐久性和抵抗恶劣环境差的问题,提出通过聚乙烯醇纤维对混凝土进行改性,并研究了纤维对混凝土的改性效果。试验结果表明,当聚乙烯醇纤维掺量为12%时(PVA12样品),混凝土坍落度较基础混凝土下降了约45%。在28 d龄期,PVA12混凝土抗压强度约为65 MPa,较基础混凝土抗压强度提升了约28%;抗折强度达到了8.5 MPa,较基础混凝土提升了约55%;剩余强度较PVA6混凝土剩余强度增加了约210%;电阻率较基础混凝土大18.6Ω·cm;氯离子迁移系数与基础混凝土较为接近,满足抗氯离子渗透能力极高的标准要求。改性混凝土表现出良好的工作性能、力学性能和抗氯离子渗透能力。

关键词：聚乙烯醇纤维抗盐蚀性能氯离子迁移系数力学性能

Ensemble forecast of tropical cyclone tracks based on deep neural networks

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Frontiers of Earth Science 2022年第3期16卷 671-677页

作者： Chong wang qing XU Yongcun CHENG Yi PAN Hong LI Key Laboratory of Marine Hazards Forecasting(Ministry of Natural Resources) Hohai UniversityNanjing 210098China College of Marine Technology Faculty of Information Science and EngineeringOcean University of ChinaQingdao 266100China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China PIESAT Information Technology Co.Ltd. Beijing 100195China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Shanghai Typhoon Institute China Meteorological AdministrationShanghai 200030China

A nonlinear artificial intelligence ensemble forecast model has been developed in this paper for predicting tropical cyclone(TC)tracks based on the deep neural network(DNN)by using the 24-h forecast data from the China Meteorological Administration(CMA),Japan Meteorological Agency(JMA)and Joint Typhoon Warning Center(JTWC).Data from a total of 287 TC cases over the Northwest Pacific Ocean from 2004 to 2015 were used to train and validate the DNN based ensemble forecast(DNNEF)*** comparison of model results with Best Track data of TCs shows that the DNNEF model has a higher accuracy than any individual forecast center or the traditional ensemble forecast *** average 24-h forecast error of 82 TCs from 2016 to 2018 is 63 km,which has been reduced by 17.1%,16.0%,20.3%,and 4.6%,respectively,compared with that of CMA,JMA,JTWC,and the error-estimation based ensemble *** results indicate that the nonlinear DNNEF model has the capability of adjusting the model parameter dynamically and automatically,thus improving the accuracy and stability of TC prediction.

关键词： tropical cyclone track deep neural network ensemble forecast

Cooperative and Competitive Multi-Agent Systems:From Optimization to Games

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IEEE/CAA Journal of Automatica Sinica 2022年第5期9卷 763-783页

作者： Jianrui wang Yitian Hong Jiali wang Jiapeng Xu Yang Tang qing-Long Han Jürgen Kurths Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Department of Electrical and Computer Engineering University of WindsorWindsorON N9B 3P4Canada IEEE School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia Potsdam Institute for Climate Impact Research 14473 Potsdam Institute of Physics Humboldt University of Berlin12489 BerlinGermany

Multi-agent systems can solve scientific issues related to complex systems that are difficult or impossible for a single agent to solve through mutual collaboration and cooperation *** a multi-agent system,agents with a certain degree of autonomy generate complex interactions due to the correlation and coordination,which is manifested as cooperative/competitive *** survey focuses on multi-agent cooperative optimization and cooperative/non-cooperative *** from cooperative optimization,the studies on distributed optimization and federated optimization are *** survey mainly focuses on distributed online optimization and its application in privacy protection,and overviews federated optimization from the perspective of privacy protection ***,cooperative games and non-cooperative games are introduced to expand the cooperative optimization problems from two aspects of minimizing global costs and minimizing individual costs,***-agent cooperative and non-cooperative behaviors are modeled by games from both static and dynamic aspects,according to whether each player can make decisions based on the information of other ***,future directions for cooperative optimization,cooperative/non-cooperative games,and their applications are discussed.

关键词： Cooperative games counterfactual regret minimization distributed optimization federated optimization fictitious

Analyzing architectural diversity in maize plants using the skeletonimage-based method

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Journal of Integrative Agriculture 2023年第12期22卷 3804-3809页

作者： LIU Min-guo Thomas CAMPBELL LI Wei wang Xi-qing College of Biological Sciences China Agricultural UniversityBeijing 100193P.R.China Frontier Technology Research Institute of China Agricultural University in Shenzhen Shenzhen 518000P.R.China Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBeijing 100193P.R.China Department of Biology Northeastern Illinois UniversityChicago 60625USA

Shoot architecture in maize is critical since it determines resource use,impacts wind and rain damage tolerance,and affects yield *** the diversity among inbred lines in heterosis breeding is essential,especially when describing germplasm ***,traditional geometric description methods oversimplify shoot architecture and ignore the plant’s overall architecture,making it difficult to reflect and illustrate *** study presents a new method to describe maize shoot architecture and quantifies its diversity by combining computer vision algorithms and persistent *** results reveal that persistent homology can capture key characteristics of shoot architecture in maize and other details often overlooked by traditional geometric *** on this method,the morphological diversity of shoot architecture can be mined(quantified),and the main shoot architecture types can be ***,this method can easily describe the diversity of shoot architecture in many maize materials.

关键词： maize shoot architecture persistent homology phenotyping technology morphological diversity

What are the Limiting Environmental Factors for the Evolution of Early Eukaryotic Diversity?

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Journal of Earth Science 2023年第4期34卷 1313-1314页

作者： Shuichang Zhang Xiaomei wang Huajian wang qing Tang Fenglian Zhang Dan Lü Research Institute of Petroleum Exploration&Development China National Petroleum CorporationBeijing 100083China School of EarthSciences and Engineering NanjingUniversityNanjing 210023China School of Ocean Sciences China University of Geosciences BeijingBeijing 100083China

Exploring the mysteries of life is an eternal frontier of science. Containing complex and diverse organisms on the surface of the Earth is one of the most crucial characteristics that distinguish the Earth from other planets in the Solar system. Almost all animals, plants, and fungi that can be seen with the naked eye belong to eukaryotes。

关键词： Earth Solar planet

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风电场站用变保护电流互感器一次电流选择

电力勘测设计 2024年第2期 6-10页

作者：李清中国电力工程顾问集团西南电力设计院有限公司四川成都610051

风电场站用变容量偏小,其保护用电流互感器额定一次电流值选择按保护故障校验电流取值将造成过电流保护、过负荷保护整定困难甚至无法给出二次定值。本文结合站用变保护整定计算,提出适用于站用变保护用的电流互感器额定一次电流值选择... 详细信息

风电场站用变容量偏小,其保护用电流互感器额定一次电流值选择按保护故障校验电流取值将造成过电流保护、过负荷保护整定困难甚至无法给出二次定值。本文结合站用变保护整定计算,提出适用于站用变保护用的电流互感器额定一次电流值选择的方法。最后,已投运风电场工程站用变定值单验证了该方法的正确性。

关键词：电流互感器一次电流值过电流保护过负荷保护保护整定计算

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电解槽测温技术在冶炼厂的应用

世界有色金属 2024年第9期 7-9页

作者：韦庆深圳市中金岭南有色金属股份有限公司丹霞冶炼厂广东韶关512325

本文基于案例探讨了电解槽测温技术在冶炼厂的应用,不仅分析了电解槽测温技术的基本原理,并深度讨论了电解槽测温技术在冶炼厂中的应用对策,包括技术选择与优化、实时监测与数据分析、温度控制与优化以及预警与故障处理,以确保电解槽测... 详细信息

本文基于案例探讨了电解槽测温技术在冶炼厂的应用,不仅分析了电解槽测温技术的基本原理,并深度讨论了电解槽测温技术在冶炼厂中的应用对策,包括技术选择与优化、实时监测与数据分析、温度控制与优化以及预警与故障处理,以确保电解槽测温技术的可靠性和准确性。

关键词：电解槽测温技术冶炼厂实时监测应用效果

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血脂检验在2型糖尿病患者中的临床应用价值观察

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中国实用医药 2024年第19期19卷 85-87页

作者：余清佛山市三水区人民医院检验科 528100

目的探讨血脂检验在2型糖尿病患者中的应用价值。方法选取76例2型糖尿病患者为研究组,另选取76例健康者为对照组。所有研究对象均接受血脂检测,比较两组血脂[总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆... 详细信息

目的探讨血脂检验在2型糖尿病患者中的应用价值。方法选取76例2型糖尿病患者为研究组,另选取76例健康者为对照组。所有研究对象均接受血脂检测,比较两组血脂[总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)]检验指标及血脂异常发生率。结果研究组TC(5.81±1.00)mmol/L、TG(2.21±0.83)mmol/L、LDL-C(3.67±0.50)mmol/L均高于对照组的(4.53±0.60)、(1.21±0.31)、(2.58±0.51)mmol/L, HDL-C(1.05±0.10)mmol/L低于对照组的(1.30±0.32)mmol/L(P2%,均较对照组的5.3%、7.9%、5.3%、11.8%高(P2型糖尿病患者进行血脂检验能够为疾病的诊断提供准确参考,利于治疗方案的针对性实施。

关键词： 2型糖尿病血脂检验诊断

鄱阳湖围垦区藕塘生境小天鹅与白鹤的种间关系

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动物学杂志 2024年第2期59卷 161-171页

作者：丁慧芳陈青王亚芳朱仔伟周海燕王文娟江西省流域生态演变与生物多样性重点实验室南昌大学生命科学研究院流域生态学研究所南昌大学生命科学学院南昌330031 江西省林业科学院南昌330013 南昌五星白鹤保护小区南昌330200 江西鄱阳湖湿地保护与恢复国家长期科研基地和江西鄱阳湖湿地生态系统国家定位观测研究站南昌330031 北京林业大学生态与自然保护学院北京林业大学东亚-澳大利西亚候鸟迁徙研究中心北京100083

鄱阳湖是小天鹅(Cygnus columbianus)和白鹤(Leucogeranus leucogeranus)极为重要的越冬地,它们均主要以沉水植物苦草(Vallisneria spp.)冬芽为食,且通过觅食空间生态位分化减少种间竞争。近年来,鄱阳湖苦草冬芽锐减导致大量小天鹅和白... 详细信息

鄱阳湖是小天鹅(Cygnus columbianus)和白鹤(Leucogeranus leucogeranus)极为重要的越冬地,它们均主要以沉水植物苦草(Vallisneria spp.)冬芽为食,且通过觅食空间生态位分化减少种间竞争。近年来,鄱阳湖苦草冬芽锐减导致大量小天鹅和白鹤由自然生境转移到南昌五星白鹤保护小区的藕塘觅食。大量小天鹅和白鹤集中在小片藕塘觅食可能导致种间竞争强度增加。因此,本研究以五星白鹤保护小区藕塘为研究地点,于2021年11月10日至25日,采用瞬时扫描法和焦点动物法调查了藕塘与白鹤混群和不与白鹤混群时小天鹅的日间行为、单次取食时间和每分钟摄食成功频次,并采用单因素方差分析或Mann-Whitney U检验对数据进行统计分析。结果表明,小天鹅日间行为主要以觅食(45.59%)、运动(17.05%)和休息(15.92%)为主。小天鹅和白鹤混群时的觅食行为比例和单次觅食时间显著高于不混群时,表明小天鹅主要通过增加觅食时间以应对种间竞争的负面影响,满足能量需求。小天鹅混群时的每分钟摄食成功频次显著高于不混群时,这可能是由于小天鹅通过摆动脚蹼或者扁平喙啄食的方式较难取食到大块莲藕,而白鹤到达藕田后,通过长喙啄碎藕块后便于小天鹅取食,进而提高了小天鹅的摄食成功率。本研究结果表明,沉水植被退化引起的小天鹅和白鹤的食性改变和觅食空间变化导致了物种之间竞争强度增加,在藕塘觅食的小天鹅通过增加觅食时间的方式应对种间竞争。本研究有助于评估沉水植被退化对小天鹅等珍稀濒危鸟类的潜在影响,为鸟类保护政策的制定提供科学依据。

关键词：南昌五星白鹤保护小区人工生境觅食时间行为节律种间竞争