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A new species Lobophora tsengii ***.(Dictyotales;Phaeophyceae)from Bach Long Vy(Bailongwei)Island,Vietnam

Journal of Oceanology and Limnology 2021年第6期39卷 2363-2369页

作者： Zhongmin SUN minh dong dao Quoc Toan TRAN Duc Tien DAM Department of Marine Organism Taxonomy and Phylogeny Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Graduate University of Science and Technology Vietnam Academy of Science and Technology(VAST)Hanoi 100000Vietnam Institute of Natural Products Chemistry Vietnam Academy of Science and Technology(VAST)Cau GiayHanoi 100000Vietnam Institute of Marine Environment and Resources(IMER) Vietnam Academy of Science and Technology(VAST)Haiphong 180000Vietnam Haiphong University of Medicine and Pharmacy Haiphong 180000Vietnam

A new species Lobophora tsengii is described from Bach Long Vy(Bailongwei)Island,Haiphong Province,*** plants inhabit the subtidal zone and have predominantly erect fan-shaped thalli that attach to the substrate by a basal *** thallus is commonly composed of a single layer of large medullary cells with four layers of cortical cells on either side of the *** newly collected specimens from the island are morphologically similar to those from Hainan Island,China,but differ from the New Caledonian ones in having thicker *** molecular phylogenetic analyses based on concatenated rbcL and cox3 s equences,the specimens from the island were 100%identical to those from Hainan Island,China,and they formed a clade separating from other Lobophora ***,based on analyses of numerous cox3 s equences,our specimens were also distinguished from the closely related taxa occurring in New Caledonia,Kenya,and West *** the morphological and molecular analyses,we conclude that our specimens represent a new species of Lobophora,which is apparently endemic to the Beibu Gulf(Gulf of Tonkin)and adjacent waters.

关键词： Bach Long Vy(Bailongwei)Island cox3 Lobophora molecular phylogeny morphology rbcL

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A review of reservoir damage during hydraulic fracturing of deep and ultra-deep reservoirs

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Petroleum Science 2024年第1期21卷 384-409页

作者： Kun Zhang Xiong-Fei Liu dao-Bing Wang Bo Zheng Tun-Hao Chen Qing Wang Hao Bai Er-dong Yao Fu-Jian Zhou National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum-BeijingBeijing102249China School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China Tuha Downhole Operation Company CNPC Xibu Drilling Engineering Company LimitedShanshan838200XinjiangChina

Deep and ultra-deep reservoirs have gradually become the primary focus of hydrocarbon exploration as a result of a series of significant discoveries in deep hydrocarbon exploration *** reservoirs present unique challenges due to their deep burial depth(4500-8882 m),low matrix permeability,complex crustal stress conditions,high temperature and pressure(HTHP,150-200℃,105-155 MPa),coupled with high salinity of formation ***,the costs associated with their exploitation and development are exceptionally *** deep and ultra-deep reservoirs,hydraulic fracturing is commonly used to achieve high and stable *** hydraulic fracturing,a substantial volume of fluid is injected into the ***,statistical analysis reveals that the flowback rate is typically less than 30%,leaving the majority of the fluid trapped within the ***,hydraulic fracturing in deep reservoirs not only enhances the reservoir permeability by creating artificial fractures but also damages reservoirs due to the fracturing fluids *** challenging“three-high”environment of a deep reservoir,characterized by high temperature,high pressure,and high salinity,exacerbates conventional forms of damage,including water sensitivity,retention of fracturing fluids,rock creep,and proppant *** addition,specific damage mechanisms come into play,such as fracturing fluid decomposition at elevated temperatures and proppant diagenetic reactions at HTHP ***,the foremost concern in deep oil and gas development lies in effectively assessing the damage inflicted on these reservoirs by hydraulic fracturing,comprehending the underlying mechanisms,and selecting appropriate ***'s noteworthy that the majority of existing studies on reservoir damage primarily focus on conventional reservoirs,with limited attention given to deep reservoirs and a lack of systematic *** light of this,our approach entails initially summarizin

关键词： Artificial fracture Deep and ultra-deep reservoir Fracture conductivity Fracturing fluid Hydraulic fracturing Reservoir damage

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Mechanical Behavior and Failure Mechanism of an As-Extruded Mg-11wt%Y Alloy at Elevated Temperature

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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 969-981页

作者： Lan Zhang dao-Kui Xu Bao-Jie Wang Cui-Lan Lu Shuo Wang Xiang-Bo Xu dong-Liang Wang Xin Lv En-Hou Han School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang110159China Key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang110819China Institute of Corrosion Science and Technology Guangdong510070China

Through carrying out the high-temperature tensile experiments on an as-extruded Mg-11wt%Y alloy at 350℃,400℃,450℃,500℃and 550℃,the mechanical behavior and fracture mechanisms at elevated temperatures are investigated and *** results show that with the increase of temperature,the yield strength and ultimate tensile strength of the alloy increase at first and then decrease,while that the elongation ratio decreases firstly and then *** the sample being tested at 350℃,the values of yield strength,ultimate tensile strength and the elongation ratio are 188 MPa,266 MPa and 11%,*** 400℃,the yield strength and ultimate tensile strength reach the maximum values of,respectively,198 MPa and 277 MPa,but the elongation ratio is the lowest and its value is only 8%.When the applied temperature is increased to 550℃,the values of yield strength and ultimate tensile strength,respectively,decrease to 140 MPa and 192 MPa and the elongation ratio increases to 38%.Failure analysis demonstrates that the fracture surfaces of different samples are mainly composed of plastic dimples and exhibit the typical characteristic of ductile *** observation to the fracture side surfaces indicates that at the temperatures of 350℃and 400℃,microcracks mainly initiate in the interior of Mg_(24)Y_(5)*** the temperatures are 450℃,500℃and 550℃,the cracks preferentially initiate at the Mg_(24)Y_(5)/α-Mg interfaces.

关键词： Mg-Y alloy High-temperature tensile properties Fracture mechanism Failure analysis

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Recent progress and strategies of cathodes toward polysulfides shuttle restriction for lithium-sulfur batteries

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Rare Metals 2024年第9期43卷 4132-4161页

作者： Xing-You Rao Shuang-Fei Xiang Jian Zhou Zhen Zhang Xiang-Yu Xu Yuan-Yuan Xu Xin-Chi Zhou Zheng-dao Pan Su-Chong Tan Shi-Xing dong Zhou-Lu Wang Yu-Tong Wu Yun-Lei Zhou Xiang Liu Yi Zhang Shan Jiang School of Energy Sciences and Engineering Nanjing Tech University School of Materials Science and Engineering and Institute of Smart Fiber Materials Zhejiang Sci-Tech University JiangSu Sailboat Petrochemical Co. Ltd Hangzhou Institute of Technology Xidian University

Lithium-sulfur batteries(LSBs) have already developed into one of the most promising new-generation high-energy density electrochemical energy storage systems with outstanding features including high-energy density, low cost, and environmental friendliness. However, the development and commercialization path of LSBs still presents significant limitations and challenges, particularly the notorious shuttle effect triggered by soluble longchain lithium polysulfides(LiPSs), which inevitably leads to low utilization of cathode active sulfur and high battery capacity degradation, short cycle life, etc. Substantial research efforts have been conducted to develop various sulfur host materials capable of effectively restricting the shuttle effect. This review firstly introduces the fundamental electrochemical aspects of LSBs, followed by a comprehensive analysis of the mechanism underlying the shuttle effect in Li–S batteries and its profound influence on various battery components as well as the overall battery performance. Subsequently, recent advances and strategies are systematically reviewed, including physical confinement, chemisorption, and catalytic conversion of sulfur hosts for restricting LiPSs shuttle effects. The interplay mechanisms of sulfur hosts and LiPSs are discussed in detail and the structural advantages of different host materials are highlighted. Furthermore, key insights for the rational design of advanced host materials for LSBs are provided, and the upcoming challenges and the prospects for sulfur host materials in lithium-sulfur batteries are also explored.

关键词： Host Lithium-sulfur batteries Polysulfides Shuttle effect

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柑橘园土壤与叶片养分对“红美人”果实品质的影响

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中国土壤与肥料 2024年第7期 192-199页

作者：焦云沈盼谢让金韩东道宁波市农业科学研究院林业研究所浙江宁波315040 宁波市特色园艺作物品质调控与抗性育种重点实验室浙江宁波315040 西南大学/中国农业科学院柑桔研究所重庆400712 宁波市田园牧歌农业发展有限公司浙江宁波315727

为探明土壤及叶片养分对“红美人”果实品质的影响效应,对浙江省宁波市象山县33个“红美人”果园土壤、叶片养分和果实品质进行测定及评价,通过多元统计分析筛选影响其果实品质的主要土壤及叶片养分因子,明确果实品质、土壤及叶片养分... 详细信息

为探明土壤及叶片养分对“红美人”果实品质的影响效应,对浙江省宁波市象山县33个“红美人”果园土壤、叶片养分和果实品质进行测定及评价,通过多元统计分析筛选影响其果实品质的主要土壤及叶片养分因子,明确果实品质、土壤及叶片养分之间的相关性。研究结果表明,调查果园中土壤pH处于偏酸性环境,平均值为5.41,土壤养分总体偏高。其中,有效铁、有效锰、有效铜、有效锌、有效磷、速效钾、交换性钙、交换性镁、全氮、全磷和全钾含量平均值超出适宜范围;同时,叶片中铁、锰和氮含量均值亦高于适宜范围,而钾和钙含量则低于适宜范围。果实品质是多个土壤及叶片养分因子综合作用的结果,果实可溶性固形物含量与土壤中有效锰和碱解氮含量呈正相关性,相关系数分别为0.55和0.45;果肉紧实度与土壤中有效锌、有效磷、全磷和碱解氮含量呈负相关性,相关系数分别为-0.83、-0.79、-0.50和-0.51;果肉酸度与叶片中钾和磷含量亦存在相关性,相关系数分别为-0.63和-0.50。逐步回归分析获得了影响“红美人”叶片中氮、磷、镁、锰、铜和锌含量的主要土壤养分因子。因此,针对上述果园土壤进行酸碱度调节,增施生理碱性有机肥等将作为后续土壤管理的关键。

关键词：红美人土壤养分叶片养分果实品质多元统计分析

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多极小波包变换与改进浣熊算法优化的混合核极限学习机径流预测

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中国农村水利水电 2024年第6期 1-9,20页

作者：刀海娅程刚崔东文云南省水利水电勘测设计研究院云南昆明650021 云南省文山州水务局云南文山663000

为提高日径流多步预测精度,减少模型计算规模,同时提升浣熊优化(COA)算法和混合核极限学习机(HKELM)性能,提出多极小波包变换(MWPT)-改进COA算法(ICOA)-HKELM日径流时间序列预测模型。首先,利用MWPT将日径流时序数据分解为1个低频分量和... 详细信息

为提高日径流多步预测精度,减少模型计算规模,同时提升浣熊优化(COA)算法和混合核极限学习机(HKELM)性能,提出多极小波包变换(MWPT)-改进COA算法(ICOA)-HKELM日径流时间序列预测模型。首先,利用MWPT将日径流时序数据分解为1个低频分量和2个高频分量,并构建局部高斯径向基核函数和全局多项式核函数相混合的HKELM;其次,简要介绍COA算法原理,基于Circle映射等策略对COA进行改进,提出ICOA算法,通过8个典型函数对ICOA算法进行仿真验证,并与基本COA算法、鲸鱼优化算法(WOA)、灰狼优化算法(GWO)作对比,旨在验证ICOA算法的优化性能;最后,利用ICOA优化HKELM超参数(正则化参数、核参数、权重系数),建立MWPT-ICOA-HKELM模型,并构建MWPT-COA-HKELM、MWPT-WOA-HKELM、MWPT-GWO-HKELM、小波包变换(WPT)-ICOA-HKELM、小波变换(WT)-ICOA-HKELM、MWPT-ICOA-BP模型作对比分析,通过云南省景东、把边水文站2016-2020年日径流时间序列多步预测实例对各模型进行验证。结果表明:(1)ICOA具有较好的改进效果,仿真精度优于COA、WOA、GWO算法。(2)MWPT-ICOA-HKELM模型预测效果优于其他对比模型,其对实例单步预测效果“最好”,超前3步和超前5步“较好”,超前7步“较差”,预测精度随预测步长的增加而降低。(3)利用ICOA优化HKELM超参数,可显著提高HKELM预测性能,超参数优化效果优于COA、WOA、GWO算法。

关键词：日径流预测多极小波包变换改进浣熊优化算法混合核极限学习机超参数优化

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Expert consensus on the diagnosis, treatment, and prevention of respiratory syncytial virus infections in children

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World Journal of Pediatrics 2024年第1期20卷 11-25页

作者： Xian-Li Zhang Xi Zhang Wang Hua Zheng-De Xie Han-Min Liu Hai-Lin Zhang Bi-Quan Chen Yuan Chen Xin Sun Yi Xu Sai-Nan Shu Shun-Ying Zhao Yun-Xiao Shang Ling Cao Yan-Hui Jia Luo-Na Lin Jiong Li Chuang-Li Hao Xiao-Yan dong dao-Jiong Lin Hong-Mei Xu De-Yu Zhao Mei Zeng Zhi-Min Chen Li-Su Huang Department of Infectious Disease Children's HospitalZhejiang University School of Medicine3333 Binsheng RoadBinjiang DistrictHangzhou 310052China Clinical Research Unit Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina Beijing Pediatric Research Institute Beijing Children's HospitalCapital Medical UniversityBeijingChina Department of Pediatric Pulmonology West China Second University HospitalSichuan UniversityChengduChina Department of Pediatric Pulmonology the Second Affiliated Hospital&Yuying Children's HospitalWenzhou Medical UniversityWenzhouChina Department of Infectious Disease Anhui Provincial Children's HospitalHefeiChina Department of Pediatrics the Second Hospital of Hebei Medical UniversityShijiazhuangChina Department of Pediatrics Xijing Hospitalthe Fourth Military Medical UniversityXi'anChina Department of Infectious Disease Guangzhou Women and Children's Medicine CenterGuangzhou Medicine UniversityGuangzhouChina Department of Pediatrics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Respiratory Disease Beijing Children's HospitalCapital Medical UniversityBeijingChina Department of Pediatric Respiratory Shengjing Hospital of China Medical UniversityShenyangChina Respiratory Department Children's Hospital Affiliated to Capital Institute of PediatricsBeijingChina Department of Clinical Epidemiology Aarhus UniversityAarhusDenmark Department of Respirology Children's Hospital of Soochow UniversitySuzhouChina Department of Respiratory Children's Hospital of ShanghaiChildren's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina Department of Infectious Disease Hainan Women and Children's Medical CenterHaikouChina Department of Infectious Disease Children's Hospital of Chongqing Medical UniversityChongqingChina Department of Respiratory Children's Hospital of Nanjing Medical UniversityNanjingChina Department of Infectious Di

Background Respiratory syncytial virus(RSV)is the leading global cause of respiratory infections and is responsible for about 3 million hospitalizations and more than 100,000 deaths annually in children younger than 5 years,representing a major global healthcare *** is a great unmet need for new agents and universal strategies to prevent RSV infections in early life.A multidisciplinary consensus development group comprising experts in epidemiology,infectious diseases,respiratory medicine,and methodology aims to develop the current consensus to address clinical issues of RSV infections in *** sources The evidence searches and reviews were conducted using electronic databases,including PubMed,Embase,Web of Science,and the Cochrane Library,using variations in terms for"respiratory syncytial virus","RSV","lower respiratory tract infection","bronchiolitis","acute","viral pneumonia","neonatal","infant""children",and"pediatric".Results Evidence-based recommendations regarding diagnosis,treatment,and prevention were proposed with a high degree of *** supportive care remains the cornerstone for the management of RSV infections,new monoclonal antibodies,vaccines,drug therapies,and viral surveillance techniques are being rolled *** This consensus,based on international and national scientific evidence,reinforces the current recommendations and integrates the recent advances for optimal care and prevention of RSV *** improvements in the management of RSV infections will require generating the highest quality of evidence through rigorously designed studies that possess little bias and sufficient capacity to identify clinically meaningful end points.

关键词： Consensus prevention Respiratory syncytial virus Treatment

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基于改进K-均值算法的零部件拣选聚类模型

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软件导刊 2024年第9期23卷 131-136页

作者：周到董宝力浙江理工大学机械工程学院浙江杭州310018

针对零部件多种少量拣选问题,在多人协同拣选模式下,任务分配不合理、拣选时长相差大,拣选环节易超时,构建以最短拣选时长为目标的多人协同拣选模型,并用改进K-均值算法及遗传算法对模型进行求解。针对传统K-均值算法聚类结果各簇所包... 详细信息

针对零部件多种少量拣选问题,在多人协同拣选模式下,任务分配不合理、拣选时长相差大,拣选环节易超时,构建以最短拣选时长为目标的多人协同拣选模型,并用改进K-均值算法及遗传算法对模型进行求解。针对传统K-均值算法聚类结果各簇所包含拣选点数量相差巨大的缺点,采用各簇拣选时间为指标,对拣选点所归属簇变换,并利用遗传算法对聚类结果进行路径规划、拣选时长计算,得到最优聚类结果。以某安防设备生产企业的零部件拣选环节为研究对象,与简单分批得到的拣选时间进行对比,验证了该算法的有效性。

关键词：任务分配 K-均值算法遗传算法路径规划

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面向制造与装配的设计的装配式竖向预制混凝土构件参数化设计与应用

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科学技术与工程 2024年第13期24卷 5480-5490页

作者：邹贻权余有董道德潘寒湖北工业大学土木建筑与环境学院武汉430068 长沙理工大学土木工程学院长沙410114 中建三局科创产业发展有限公司武汉430095

装配式建筑设计、生产过程存在标准化程度低、数据联系较差等诸多问题。引入了制造业中面向制造与装配的设计(design for manufacturing and assembly,DFMA)的产品设计理念,研究了装配式建筑竖向预制混凝土(precast concrete,PC)构件的... 详细信息

装配式建筑设计、生产过程存在标准化程度低、数据联系较差等诸多问题。引入了制造业中面向制造与装配的设计(design for manufacturing and assembly,DFMA)的产品设计理念,研究了装配式建筑竖向预制混凝土(precast concrete,PC)构件的快速建模与深化设计应用,通过对建筑企业大量装配式建筑项目PC构件深化设计图纸的梳理分析,分析了图纸中构件组成规律,创新性地将PC构件二次拆分为模块。分析模块的种类、组合规律、数据架构等,形成模块的设计标准。将设计标准融入建筑信息模型(building information modeling,BIM)软件中,并开发相应的工具软件实现模块的快速建模。以软件创建的参数化标准模块为基础,以关联、匹配、调取、组合、拆解的关键技术实现PC构件的深化设计与工厂的制造联系。最后,通过实际工程案例进行测试对比。结果表明,竖向PC构件的建模速度提升70%、深化设计效率提升约80%,深化设计费用节省约80%,实现最小制造成本。研究结果有助于构建装配式建筑标准化的设计和生产体系,推广少规格多组合的设计方法,强化数据联系,提高装配式建筑的综合效益。

关键词： PC构件 BIM DFMA 模块化标准化参数化设计

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Recent advances in vacancy engineering for reliable lithiumsulfur batteries

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Rare Metals 2024年第2期43卷 455-477页

作者： Wen-dong Liu Xiao Tang Jun-An Feng Chao-Yue Zhang Hao Liu Chuan Shi Xiao-Xian Zhao Jian-Jun Song College of Physics School of Chemistry and Chemical EngineeringQingdao UniversityQingdao266071China Faculty of Science Centre for Clean Energy TechnologySchool of Mathematical and Physical SciencesUniversity of Technology SydneySydneyNSW2007Australia Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding071001China

The high-energy-density and low-cost features endow lithium-sulfur batteries with broad application ***,many drawbacks,especially the detrimental shuttle effect,have hindered the further development of *** response,a lot of new structures have been applied to suppress the shuttle effect and promote the development of ***,vacancy engineering has gained the attention of researchers due to its unique electronic *** review aims to analyze the application of vacancy engineering in ***,the electrochemistry of LSBs has been systematically discussed and the existing challenges as well as improvement tactics of LSBs have also been ***,the preparation methods and characterization technologies of various vacancies are summarized,including oxygen vacancies,sulfur vacancies,selenium vacancies,other anion vacancies,cation vacancies,*** latest applications of vacancy engineering in LSBs are also summarized in this ***,some prospects and insights for further investigation and practical application of vacancy engineering in LSBs are put forward.

关键词： Lithium-sulfur batteries(LSBs) Defects Vacancy engineering Electronic structure Shuttle effect

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