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Estimation of Extreme Marine Hydrodynamic Variables in Western Laizhou Bay

Journal of Ocean University of China 2015年第3期14卷 425-432页

作者： dai yanchen QIAO Lulu XU Jishang ZHOU Chunyan DING Dong BI Wei Key Lab of Submarine Sciences & Prospecting Techniques MOE Ocean University of China China Petroleum & Chemical Corporation Shengli Oilfield Branch College of Marine Geosciences Ocean University of China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Qingdao Meteorological Bureau

Laizhou Bay and its adjacent waters are of great importance to China＇s marine oil and gas development. It is therefore crucial to estimate retttrn-period values of marine environmental variables in this region to ensure the safety and success of maritime engineering and maritime exploration. In this study, we used numerical simulations to estimate extreme wave height, sea current velocity and sea-level height in westem Laizhou Bay. The results show that the sea-level rise starts at the mouth of the bay, increases toward west/southwest, and reaches its maximum in the deepest basin of the bay. The 100-year return-period values of sea level rise can reach 3.4-4.0m in the western bay. The elevation of the western part of the Qingdong Oil Field would remain above the sea sur- face during extreme low sea level, while the rest of the oil field would be 1,6-2.4m below the sea surface. The return-period value of wave height is strongly affected by water depth; in fact, its spatial distribution is similar to the isobath＇s. The 100-year return-period values of effective wave height can be 6m or higher in the central bay and be more than 1 m in the shallow water near shore. The 100-year return-period values of current velocity is about 1.2-1.8 ms-1 in the Qingdong Oil Field. These results provide scientific basis for ensuring construction safety and reducing construction cost,

关键词： Laizhou Bay extreme value current velocity wave surface elevation return period

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含氟表面活性剂对固体表面润湿性的影响及应用

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石油化工高等学校学报 2013年第4期26卷 62-65,82页

作者：代彦臣中国海洋大学海洋地球科学学院山东青岛266100

利用座滴法研究了含氟表面活性剂在石英表面形成的吸附膜的润湿性质,考察了温度及不同类型电解质对其接触角的影响趋势,并开展了室内模拟驱油实验。研究发现,两性含氟表面活性剂可以有效地改变石英表面的润湿性,在蒸馏水及模拟地层水的... 详细信息

利用座滴法研究了含氟表面活性剂在石英表面形成的吸附膜的润湿性质,考察了温度及不同类型电解质对其接触角的影响趋势,并开展了室内模拟驱油实验。研究发现,两性含氟表面活性剂可以有效地改变石英表面的润湿性,在蒸馏水及模拟地层水的条件下都可以使亲水的石英表面变为中性。同时,两性含氟表面活性剂具有较好的抗盐性及耐温性。室内模拟驱油实验显示,两性含氟表面活性剂将岩心的润湿性控制在中性弱亲水状态,促进孔道水膜剥离,减小水驱渗流阻力,从而降低水驱压力和提高原油采收率。

关键词：含氟表面活性剂接触角石英表面驱油效率

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Approach from the laboratory to the field: New strategies in the control of mosquito-borne infectious diseases

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Science China Life Sciences 2025年第1期68卷 303-305页

作者： Ziqian Xu Lianpan dai Jun Liu National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases (NITFID) National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and Prevention CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences

Vector-borne viruses, transmitted among humans and animal hosts through bites of vectors such as mosquitoes and ticks,pose a great and ongoing threat to public health and biosafety(Yang et al., 2022).Among them, dengue virus-induced epidemics, have dramatically increased worldwide in recent decades. The report released by the World Health Organization(WHO) at the end of 2023 showed that dengue epidemic globally surged in2023, with the number of reported cases nearing a historical peak.

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Lindley分布的统计分析

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统计与决策 2017年第18期33卷 77-80页

作者：刘晏辰代莹王蓉华徐晓岭厦门大学经济学院福建厦门361005 上海师范大学数理学院上海200234 上海对外经贸大学统计与信息学院上海200444

文章在全样本场合下,比较了两种求参数区间估计的方法,通过Monte-Carlo模拟比较了区间估计的精度。其次在定数截尾样本场合下,给出了参数的极大似然估计与逆矩估计,通过模拟比较认为逆矩估计比较精确,同时还给了求参数区间估计方法,通... 详细信息

文章在全样本场合下,比较了两种求参数区间估计的方法,通过Monte-Carlo模拟比较了区间估计的精度。其次在定数截尾样本场合下,给出了参数的极大似然估计与逆矩估计,通过模拟比较认为逆矩估计比较精确,同时还给了求参数区间估计方法,通过模拟发现方法是可行的。

关键词： Lindely分布全样本定数截尾样本极大似然估计逆矩估计区间估计

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Emerging trends in the selective production of value-added aromatics

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Science China Chemistry 2025年第1期68卷 15-20页

作者： Yuchao Wu Houliang dai Weisheng Yang Yaxing Li Lichen Liu Petrochemical Research Institute Company Limited China National Petroleum Corporation Engineering Research Center of Advanced Rare Earth Materials Department of Chemistry Tsinghua University

1 Introduction Aromatics (mainly benzene, toluene, and xylenes, BTX) are essential intermediates in the chemical industry. They are employed in the synthesis of a broad spectrum of chemicals and materials, e.g., various polymers, plastics, resins, solvents, dyes, pharmaceuticals [1]. The manufacturing pathway of BTX mainly includes petroleum reforming of naphtha, coal-to-aromatics, methanol-to-aromatics [2].

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Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 20-38页

作者： Qinjin dai Xuefeng Liu Xin Ma Shaojie Tian Qinghe Cui Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced Materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

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A Multi-Objective Particle Swarm Optimization Algorithm Based on Decomposition and Multi-Selection Strategy

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Computers, Materials & Continua 2025年第1期82卷 997-1026页

作者： Li Ma Cai dai Xingsi Xue Cheng Peng School of Computer Science Shaanxi Normal UniversityXi’an710119China Fujian Provincial Key Laboratory of Big Data Mining and Applications Fujian University of TechnologyFuzhou350118China Information Construction and Management Center and Institute of Artificial Intelligence and Educational New Productivity Ningxia Normal UniversityGuyuan756099China

The multi-objective particle swarm optimization algorithm(MOPSO)is widely used to solve multi-objective optimization *** the article,amulti-objective particle swarm optimization algorithmbased on decomposition and multi-selection strategy is proposed to improve the search ***,two update strategies based on decomposition are used to update the evolving population and external archive,***,a multiselection strategy is *** first strategy is for the subspace without a non-dominated *** the neighbor particles,the particle with the smallest penalty-based boundary intersection value is selected as the global optimal solution and the particle far away fromthe search particle and the global optimal solution is selected as the personal optimal solution to enhance global *** second strategy is for the subspace with a non-dominated *** the neighbor particles,two particles are randomly selected,one as the global optimal solution and the other as the personal optimal solution,to enhance local *** third strategy is for Pareto optimal front(PF)discontinuity,which is identified by the cumulative number of iterations of the subspace without non-dominated *** the subsequent iteration,a new probability distribution is used to select from the remaining subspaces to ***,an adaptive inertia weight update strategy based on the dominated degree is designed to further improve the search ***,the proposed algorithmis compared with fivemulti-objective particle swarm optimization algorithms and five multi-objective evolutionary algorithms on 22 test *** results show that the proposed algorithm has better performance.

关键词： Multi-objective optimization multi-objective particle swarm optimization decomposition multi-selection strategy

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一种测量内球面对端面对称度的测量方法研究

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现代制造技术与装备 2021年第5期57卷 69-71页

作者：于洋戴彦辰卢存祥西安动力控制科技有限公司西安710077

在机械加工生产中存在很多不同结构形式的零件,其中很大一部分包含内球面结构。该类结构的零件要求测量内球面对与其连接的端面的对称度。随着零件加工精度要求的不断提高和零件热处理要求的提出,很多内球面需要进行研磨工序。由于研磨... 详细信息

在机械加工生产中存在很多不同结构形式的零件,其中很大一部分包含内球面结构。该类结构的零件要求测量内球面对与其连接的端面的对称度。随着零件加工精度要求的不断提高和零件热处理要求的提出,很多内球面需要进行研磨工序。由于研磨属于手工作业,故对其对称度的测量使用计量的方法存在不合理性。因此,针对此种含有内球面结构的零件,研究一种内球面对与其连接的端面的对称度的测量方法及测具,简化了测量方法,提高了测量效率与精确度。

关键词：内球面对称度测具

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Oxidation Resistance of Form-stable Hightemperature Phase Change Thermal Energy Storage Materials Doped by Impregnated Graphite

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 1-12页

作者： LI Baorang dai Jianhuan ZHANG Wei LIU Xiangchen YANG Liu School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China School of Ener-gy and Environment Southeast UniversityNanjing 210096China

We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite *** mass ratio of graphite to Al(H_(2)PO_(4))_(3) changed from 0.5:1 to 4:1,and the impregnation time changed from 1 to 7 *** typical composite phase change thermal storage materials doped with the as-treated graphite were fabricated using form-stable *** investigate the oxidation and anti-oxidation behavior of the impregnated graphite at high temperatures,the samples were put into a muffle furnace for a cyclic heat *** on SEM,EDS,DSC techniques,analyses on the impregnated technique suggested an optimized processing conditions of a 3 h impregnation time with the ratio of graphite:Al(H_(2)PO_(4))_(3) as 1:3 for graphite impregnation *** investigations on high-temperature phase change heat storage materials doped by the treated graphite suggested excellent oxidation resistance and thermal cycling performance.

关键词： phase change materials graphite impregnation method oxidation,sintering thermal analysis

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不同施肥条件下烤烟生长期土壤呼吸变化及其影响因素

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烟草科技 2016年第1期49卷 8-13,30页

作者：戴衍晨王瑞申国明高林张继旭李志刚张继光中国农业科学院烟草研究所农业部烟草生物学与加工重点实验室湘西自治州烟草公司古丈县分公司湖南省古丈县古阳镇416300 湖北省烟草公司恩施州分公司

为揭示烤烟生长期土壤呼吸变化特征及其影响因素，采用田间试验，设置不施肥（CK）、施化肥（NPK）和化肥配施有机肥（NPKOM，有机氮替代30％化学氮）3种处理，采用静态箱-红外CO2法测定土壤呼吸速率，并分析了土壤温度、含水率及根系... 详细信息

为揭示烤烟生长期土壤呼吸变化特征及其影响因素，采用田间试验，设置不施肥（CK）、施化肥（NPK）和化肥配施有机肥（NPKOM，有机氮替代30％化学氮）3种处理，采用静态箱-红外CO2法测定土壤呼吸速率，并分析了土壤温度、含水率及根系生物量对土壤呼吸速率的影响。结果表明：①在烤烟大田生长期，不同施肥处理的土壤呼吸速率均呈“M”形变化，两个峰值分别出现在移栽后第81天和第107天，与CK相比，NPK和NPKOM处理可以显著提高烤烟还苗期后的土壤呼吸速率，且两种施肥处理间无显著差异。②烤烟生长期土壤呼吸的变化受土壤温度和根系生物量的影响，土壤呼吸与土壤温度呈显著正相关，5和10cm地温可以分别解释土壤呼吸速率变化的60．4％～67．6％和67．9％～76．1％。施肥和土壤深度增加均能增加土壤呼吸的温度敏感性（Q10）。③在整个大田生长期，土壤呼吸速率随烤烟根系生物量的增大而呈现先增加后减小的趋势，在烤烟生育后期土壤温度对土壤呼吸速率的影响更大。

关键词：烤烟施肥烟田土壤呼吸土壤温度根系生物量

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