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Journal of Ocean University of China 2017年第2期16卷 209-222页

作者： LI Wei TANG Yougang liu liqin liu Shuxiao CAI Runbo State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072P.R.China School of Civil Engineering Tianjin UniversityTianjin 300072P.R.China

Many studies have been done on the heave-pitch unstable coupling response for a spar platform by a 2-DOF *** fact,in addition to the heave and pitch which are in one plane,the nonlinear unstable motion will also occur in *** the results of the experiments,the unstable roll motion plays a dominant role in the motion of a spar platform which is much stronger than that of *** objective of this paper is to study 3-DOF coupling response performance of spar platform under wave and vortex-induced *** nonlinear coupled equations in heave,roll and pitch are established by considering time-varying wet surface and *** first order steady-state response is solved by multi-scales method when the incident wave frequency approaches the heave natural *** integration of the motion equations has been performed to verify the first-order perturbation *** results are confirmed by model *** is a saturation phenomenon associated with heave mode in 3-DOF systems and all extra energy is transferred to roll and *** is observed that sub-harmonic response occurs in roll and pitch when the wave force exceeds a certain *** energy distribution in roll and pitch is determined by the initial value and damping characteristics of roll and *** energy transfers from heave to pitch and then transfers from pitch to *** to the influence of the low-frequency vortex-excited force,the response of roll is more complicated than that of pitch.

关键词： spar platform 3-DOF nonlinear equations multiple scales sub-harmonic response energy infiltration

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数控技术课程思政教学案例设计

科教文汇 2024年第9期 85-89页

作者：杜娟王琛刘佩杰刘丽琴太原科技大学机械工程学院山西太原030024

课程思政是新时代高等教育落实立德树人根本任务的重要举措。文章结合机械类专业工程认证通用标准和数控技术教学大纲,重构了数控技术课程教学目标,深入系统地挖掘了课程中的思政元素,并将其与课程内容有机融合,立足思政元素与课程知识... 详细信息

课程思政是新时代高等教育落实立德树人根本任务的重要举措。文章结合机械类专业工程认证通用标准和数控技术教学大纲,重构了数控技术课程教学目标,深入系统地挖掘了课程中的思政元素,并将其与课程内容有机融合,立足思政元素与课程知识的契合点,针对课程每一章节,通过案例教学将爱国主义、集体主义、职业素养、创新意识、团队协助、工匠精神等思政元素融入课堂教学,实现润物无声的育人效果。该文的教学研究可为其他工科类专业课程思政建设提供借鉴和启示。

关键词：数控技术课程思政案例教学思政元素教学目标

The Nonlinear Bifurcation and Chaos of Coupled Heave and Pitch Motions of a Truss Spar Platform

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Journal of Ocean University of China 2015年第5期14卷 795-802页

作者： HUANG Lei liu liqin liu Chunyuan TANG Yougang State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University

This paper presents the results from a numerical study on the nonlinear dynamic behaviors including bifurcation and chaos of a truss spar platform. In view of the mutual influences between the heave and the pitch modes, the coupled heave and pitch motion equations of the spar platform hull were established in the regular waves. In order to analyze the nonlinear motions of the platform, three-dimensional maximum Lyapunov exponent graphs and the bifurcation graphs were constructed, the Poincare maps and the power spectrums of the platform response were calculated. It was found that the platform motions are sensitive to wave fre- quency. With changing wave frequency, the platform undergoes complicated nonlinear motions, including 1/2 sub-harmonic motion, quasi-periodic motion and chaotic motion. When the wave frequency approaches the natural frequency of the heave mode of the platform, the platform moves with quasi-periodic motion and chaotic motional temately. For a certain range of wave frequencies, the platform moves with totally chaotic motion. The range of wave frequencies which leads to chaotic motion of the platform increases with increasing wave height. The three-dimensional maximum Lyapunov exponent graphs and the bifurcation graphs reveal the nonlinear motions of the spar platform under different wave conditions.

关键词： truss spar platform coupled heave and pitch quasi-periodic motion chaotic motion 1/2 sub-harmonic motion maximum Lyapunov exponent bifurcation graph

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职业院校教师信息化教学水平提升路径探究

成才之路 2024年第30期 125-128页

作者：李雷刘丽琴程上海安徽中医药高等专科学校安徽芜湖241002

随着信息技术的飞速发展,职业院校信息化教学已成为提升教育质量、培养创新型人才的重要途径。为提高信息化教学质量,推进教育教学现代化,为社会培养更多具备高素质技能的专业人才,提升职业院校教师信息化教学水平尤为重要。提升职业院... 详细信息

随着信息技术的飞速发展,职业院校信息化教学已成为提升教育质量、培养创新型人才的重要途径。为提高信息化教学质量,推进教育教学现代化,为社会培养更多具备高素质技能的专业人才,提升职业院校教师信息化教学水平尤为重要。提升职业院校教师信息化教学水平,可采取以下路径:更新教师思想观念,系统培养信息素养;拓展多元学习渠道,全面丰富教学资源;深化理论与实践结合,促进教学有效转化;优化资源配置,保障教学需求;完善评价机制,激发教师潜能。

关键词：职业院校信息化教学教学水平教学质量提升

学习者数字韧性:作用机制、过程模型与发展策略

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滁州学院学报 2024年第4期26卷 97-104页

作者：刘丽琴王志临沈书生安徽中医药高等专科学校基础教学部安徽芜湖241000 丽水学院教师教育学院浙江丽水323000 南京师范大学教育科学学院南京210003

数字韧性是学习者在数字时代能够适应不断变化的外部空间的能力,数字韧性过程是学习者与数字技术交互作用的动态发展平衡过程。本文从心理韧性的视角出发,深入剖析了数字韧性的内涵和作用机制。通过结合生态平衡理论,提出了一个全面的... 详细信息

数字韧性是学习者在数字时代能够适应不断变化的外部空间的能力,数字韧性过程是学习者与数字技术交互作用的动态发展平衡过程。本文从心理韧性的视角出发,深入剖析了数字韧性的内涵和作用机制。通过结合生态平衡理论,提出了一个全面的数字韧性过程模型,模型从输入端、形成端到输出端,全面地揭示了学习者在数字学习环境中如何构建和提升其数字韧性。并基于这个模型,进一步从制度、精神和身体层面提出了一系列针对性的发展策略,以期为教育实践和研究提供新的视角。

关键词：学习者数字韧性数字韧性作用机制数字韧性过程数字韧性发展策略

Two complete mitogenomes of Ocypodoidea(Decapoda: Brachyura), Cleistostoma dilatatum(Camptandriidae) and Euplax sp.(Macrophthalmidae) and its phylogenetic implications

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Acta Oceanologica Sinica 2023年第4期42卷 81-92页

作者： Ying Zhang Liming Wei Bingjian liu liqin liu Zhenming Lü Li Gong National Engineering Laboratory of Marine Germplasm Resources Exploration and Utilization National Engineering Research Center for Facilitated Marine AquacultureZhoushan 316022China Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China

Complete mitochondrial genomes(mitogenomes) can provide useful information for phylogenetic relationships,gene rearrangement, and molecular evolution. In the present study, two newly sequenced mitogenomes of Ocypodoidea(Cleistostoma dilatatum and Euplax sp.) were reported for the first time, which are 15 444 bp and16 129 bp in length, respectively. Cleistostoma dilatatum is the first species in the family Camptandriidae whose complete mitogenome was sequenced. Each mitogenome contains an entire set of 37 genes and a putative control region, but their gene arrangements are largely different. Tandem duplication and random loss model is proposed to account for their gene arrangements. Comparative genomic analyses of 19 mitogenomes clustering in one branch reveal that 18 of them shared the same gene rearrangement, while that of C. dilatatum mitogenome was consistent with the ancestral gene arrangement of Brachyura. The dN/dS ratio analysis shows that all PCGs are evolving under purifying selection. Phylogenetic analyses show that all Macrophalmidae species cluster together as a group, and then form a sister clade with Camptandriidae. Moreover, the polyphyly of three superfamilies(Ocypodoidea, Eriphioidea, and Grapsoidea) is reconfirmed. These findings help to confirm the phylogenetic position of Camptandriidae, as well as provide new insights into the phylogeny of Brachyura.

关键词： Camptandriidae Macrophthalmidae mitogenome gene rearrangement phylogenetic analysis

Coupled Time-Domain Investigation on a Vertical Axis Wind Turbine Supported on a Floating Platform

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Journal of Ocean University of China 2023年第2期22卷 365-376页

作者： CUI Jianhui ZHAI Yongjian GUO Ying DENG Wanru liu liqin Maritime College Tianjin University of TechnologyTianjin 300384China State Key Laboratory of Hydraulic Engineering Simulation and Safety School of Civil EngineeringTianjin UniversityTianjin 300072China

The dynamic responses of a floating vertical axis wind turbine(VAWT)are assessed on the basis of an aero-hydro-mooring coupled *** aerodynamic loads on the rotor are acquired with double-multiple stream tube ***-and second-order wave loads are calculated on the basis of 3D potential *** mooring loads are simulated by catenary *** coupled model is established,and a numerical code is programmed to investigate the dynamic response of the semi-submersible VAWT.A model test is then conducted,and the numerical code is validated considering the hydrodynamic performance of the floating *** responses of the floating VAWT are studied through the numerical simulation under the sea states of wind and regular/irregular *** effects of the second-order wave force on the motions are also *** show that the slow-drift responses in surge and pitch motions are significantly excited by the second-order wave ***,the effect of foundation motion on aerodynamic loads is *** normal and tangential forces of the blades demonstrate a slight increase due to the coupling effect between the buoy motion and the aerodynamic loads.

关键词： offshore wind power semi-submersible floating foundation vertical axis wind turbine numerical calculation model test

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血清游离轻链在肺癌中的表达及诊断价值

中南大学学报（医学版） 2024年第6期49卷 914-920页

作者：肖玺郑丽曾华陈丹刘黎琴董彩梅张艳平湖南师范大学附属湘东医院呼吸内科湖南醴陵412200 湖南师范大学附属湘东医院神经内科湖南醴陵412200 湖南师范大学附属湘东医院放射科湖南醴陵412200

目的:血清游离轻链(free light chain,FLC)在多种疾病中表达异常,但其在肺癌中的表达尚不清楚,本研究旨在探讨血清FLC在肺癌中的表达及诊断价值。方法:选取2021年1至12月湖南师范大学附属湘东医院收治的80例肺癌患者作为肺癌组,另选取... 详细信息

目的:血清游离轻链(free light chain,FLC)在多种疾病中表达异常,但其在肺癌中的表达尚不清楚,本研究旨在探讨血清FLC在肺癌中的表达及诊断价值。方法:选取2021年1至12月湖南师范大学附属湘东医院收治的80例肺癌患者作为肺癌组,另选取同时期的80例健康体检人员作为对照组。收集所有参与者的一般资料、血清κFLC和λFLC水平;收集肺癌组患者住院期间的相关临床指标[血清癌胚抗原(carcinoembryonic antigen,CEA)、细胞角蛋白-19片段抗原(cytokeratin fragment antigen 21-1,CYFRA21-1)水平,以及肿瘤直径、组织学分型、TNM分期、是否有淋巴结转移]。比较肺癌组和对照组血清FLC[κFLC、λFLC、FLC(κ+λ)]的表达水平。将80例肺癌患者按性别、年龄、吸烟史、肿瘤直径、TNM分期、组织学分型、淋巴结转移进行分组,比较组间血清κFLC、λFLC表达水平的差异。采用受试者操作特征(receiver operating characteristic,ROC)曲线评价血清FLC水平单独及联合其他指标在肺癌中的诊断价值。结果:肺癌组血清FLC(κ+λ)、κFLC表达水平均显著高于对照组,差异均有统计学意义(均P0.05)。不同肿瘤直径、组织学分型、TNM分期的肺癌血清κFLC表达水平差异均无统计学意义(均P>0.05);但是,有淋巴结转移的肺癌患者血清κFLC水平高于无淋巴结转移的肺癌患者,且差异有统计学意义(P=0.033)。不同肿瘤直径、组织学分型肺癌患者的血清λFLC表达水平差异均无统计学意义(均P>0.05);但是,TNM分期III期+IV期、有淋巴结转移的肺癌患者血清λFLC表达水平分别高于TNM分期I期+II期、无淋巴结转移的肺癌患者,差异均有统计学意义(分别P=0.033,P=0.019)。κFLC、CEA诊断肺癌的曲线下面积(area under the curve,AUC)差异无统计学意义(P=0.333)。在2项联合诊断肺癌的指标中,κFLC+CYFRA21-1的诊断效能(AUC=0.875)及敏感性(71.3%)最高。κFLC+λFLC+CEA+CYFRA21-1联合诊断肺癌的AUC为0.915(95%CI 0.860~0.953,P<0.001)。结论:血清FLC在肺癌中高表达,并且与肺癌的浸润和转移有关。血清FLC尤其是κFLC对肺癌的诊断具有价值,FLC、CEA、CYFRA21-1联合检测的诊断效能最佳。

关键词：血清游离轻链肺癌诊断价值癌胚抗原细胞角蛋白-19片段抗原

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浮式风机一体化模拟的计算参数设置影响研究

海洋技术学报 2024年第1期43卷 100-108页

作者：林子赫易丛刘利琴李昊天津大学建筑工程学院天津300350 中海油研究总院技术研发中心北京100028

随着海上浮式风机的大型化发展,针对漂浮式风机的一体化耦合分析越来越重要。本文利用Simo-Riflex-Aerodyn仿真工具建立OC4-Deepcwind漂浮式风机一体化耦合模型,分析计算时间步长、初始截断时间、弹性结构单元离散数等计算参数对模拟结... 详细信息

随着海上浮式风机的大型化发展,针对漂浮式风机的一体化耦合分析越来越重要。本文利用Simo-Riflex-Aerodyn仿真工具建立OC4-Deepcwind漂浮式风机一体化耦合模型,分析计算时间步长、初始截断时间、弹性结构单元离散数等计算参数对模拟结果的影响,包括浮式基础运动、系缆张力、叶片受力等。结果表明:当计算时间步长为0.005 s、0.01 s、0.02 s时,浮式风机的响应结果差别较小,而计算消耗时间相差较大,0.01 s、0.02 s的计算时间分别是0.005 s的70%、37%。相同工况下,不同参量响应达到稳定所需时间不同,纵荡需要的时间较长,最长达200 s;不同工况下,同一参量达到稳定所需时间也不相同,切出工况需要的时间最短,较额定工况快约60 s。结构单元离散数对塔柱受力影响较小,对叶片变形影响相对明显,当叶片离散数目减小时,响应值增大12%。实际中应根据具体工况选择合理的计算时间步长、初始截断时间和弹性结构单元离散数量。

关键词：浮式风机一体化计算耦合分析参数设置影响

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3个美国油梨品种在广东湛江引种表现评价

中国南方果树 2024年第1期53卷 83-90页

作者：朱利飞刘丽琴郑雪文胡小文杨转英广东海洋大学滨海农业学院广东湛江524000 中国热带农业科学院南亚热带作物研究所/国家热带果树种质资源圃/农业农村部热带果树生物学重点实验室广东湛江524000

为了解引入国家热带果树种质资源圃(广东省湛江市)的Hass、Tonnage和Wilson 3个美国油梨品种的生育期、果实品质性状和适应性等情况,对3个品种花形态、开花特性、开花授粉受精生理特征和主要果实性状等进行观测和比较分析。结果表明,3... 详细信息

为了解引入国家热带果树种质资源圃(广东省湛江市)的Hass、Tonnage和Wilson 3个美国油梨品种的生育期、果实品质性状和适应性等情况,对3个品种花形态、开花特性、开花授粉受精生理特征和主要果实性状等进行观测和比较分析。结果表明,3个油梨品种在广东省湛江市均能正常开花结果,花期均为2月下旬至4月中旬,花期比原产地短10~20 d,Hass和Tonnage为A型花,Wilson为B型花;Hass、Tonnage和Wilson花粉萌发率分别为87%、75%和82%,开花后3 h为最佳授粉期。Hass果实生理成熟期11月初,Tonnage为8月中旬,Wilson为9月初;果实风味、口感、颜色等性状与引种地基本一致,Wilson平均单果质量达到引种地的2倍多,而Tonnage单果质量只达到引种地的69.5%,Hass单果质量与原产地相近。

关键词：油梨 Hass 引种花期花粉萌发率单果质量

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