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基于力控技术的航空整体加强框自适应定位方法研究

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机械设计与制造 2024年第4期398卷 225-228,233页

作者：于鑫武锋锋聂勇唐文献太原理工大学机械与运载工程学院山西太原030024 太原理工大学航空航天学院山西晋中030600

为了减弱制造差异对航空整体加强框装配定位质量的影响,解决强迫定位造成的定位过程管控性差和定位结果复现度低的难题,基于力控技术提出一种航空整体加强框自适应定位方法,按传统强迫方式完成装配定位后,在设计允许范围内调整若干坐标... 详细信息

为了减弱制造差异对航空整体加强框装配定位质量的影响,解决强迫定位造成的定位过程管控性差和定位结果复现度低的难题,基于力控技术提出一种航空整体加强框自适应定位方法,按传统强迫方式完成装配定位后,在设计允许范围内调整若干坐标定位孔位置,至孔位处力载值满足自适应定位要求。针对航空整体加强框装配定位工艺对形位精度、装配应力水平的要求,量化装配定位质量评价标准,基于正交试验分析定位孔处力载绝对平均值和定位检测点处应力绝对平均值的变化规律,进行装配现场易于获取的力载值取代应力值的可行性研究,通过修正装配定位质量评价标准量化公式得到坐标定位孔处力载调整目标,指导航空整体加强框装配定位。

关键词：整体加强框力控装配定位自适应孔位

Buckling of Cassini Oval Pressure Hulls Subjected to External Pressure

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China Ocean Engineering 2019年第4期33卷 503-508页

作者： tang wen-xian WANG Wei-min ZHANG Jian WANG Shu-yan Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and Technology Zhenjiang 212003 China School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China

The paper focuses on Cassini oval pressure hulls under uniform external pressure. The Cassini oval pressure hull is proposed based on the shape index of Cassini oval. The buckling of a series of Cassini oval pressure hulls with the shape index of 0.09–0.30 and one spherical pressure hull with the diameter of 2 m is devoted. Such hulls are numerically studied in the case of constant volume, material properties, and wall thickness. The results show that Cassini oval pressure hulls with the shape index of 0.10–0.11 can resist about 4% more external pressure than the spherical one. This deviates from the classical mechanics conclusion that spherical shell is the optimal shape for underwater pressure resistant structures.

关键词： pressure hull Cassini oval shell shape index buckling behaviour external pressure

Design of A Bionic Spudcan and Analysis of Penetration and Extraction Performances for Jack-up Platform

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China Ocean Engineering 2020年第1期34卷 80-88页

作者： GUO Sheng ZHUANG Hong tang wen-xian WU wen-le LIU Qin WANG Yue-yang School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu Provincial Key Laboratory of Advanced Manufacturing for Marine Mechanical Equipment Jiangsu University of Science and TechnologyZhenjiang 212003China

The mechanisms of soil structure interaction have drawn much attention in the past years in the installation and operation of jack-up platform. A bionic spudcan produced by biomimetic of egg and snail shell is proposed, and the performance of the penetration and extraction are analyzed by numerical method. The geometric contour of egg and snail shell is measured, and its mathematical model is established respectively. According to the structure of existing spudcan of jack-up platform, three kinds of typical biomimetic spudcan are designed. Furthermore, numerical analysis models of biomimetic spudcan are established respectively to study the soil structure interaction mechanism in the process of penetration and extraction, and contrastive analysis of resistance characteristics are carried out. To conclude, the results show that the biomimetic spudcan facilitates the platform installation, and it is also beneficial to the improvement of the bearing capacity of spudcan.

关键词： jack-up platform egg shell snail shell bionic design spudcan soil structure interaction

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多种副浮筒结构半潜式海洋平台运动响应分析

舰船科学技术 2024年第9期46卷 93-98页

作者：高虎山唐文献陈德开陈凯云王晓勇江苏科技大学机械工程学院江苏镇江212003

海上风电平台作为深海风力发电装置基础平台发挥着越来越重要的作用,深远海海况复杂多变,对平台的抗风浪能力有着更高的要求。本文基于奥特宝风电安装平台设计建立多种副浮筒结构的半潜式海洋平台,通过AQWA软件对其进行水动力分析。得... 详细信息

海上风电平台作为深海风力发电装置基础平台发挥着越来越重要的作用,深远海海况复杂多变,对平台的抗风浪能力有着更高的要求。本文基于奥特宝风电安装平台设计建立多种副浮筒结构的半潜式海洋平台,通过AQWA软件对其进行水动力分析。得出结论:该平台具有良好的对称性;在低频区间内平台运动响应明显,在高频区间内相对较小,说明平台的基础水动力性能良好;副浮筒高15m的平台频域响应特性优于其他高度的平台,可为以后半潜式海洋平台的设计提供理论依据。

关键词：半潜式海洋平台浮筒结构水动力性能 AQWA

自拟健脾益气消癌汤联合腹腔热灌注化疗在结直肠癌腹膜转移患者中的应用

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海南医学 2024年第14期35卷 1997-2000页

作者：吴炜唐文贤蔺松若王爱丽林谋斌同济大学附属杨浦医院普外科上海200092

目的探讨自拟健脾益气消癌汤联合腹腔热灌注化疗在结直肠癌腹膜转移患者中的应用效果。方法选取2021年6月至2023年6月同济大学附属杨浦医院收治的90例结直肠癌腹膜转移患者作为研究对象,按随机数表法分为观察组和对照组各45例。所有患... 详细信息

目的探讨自拟健脾益气消癌汤联合腹腔热灌注化疗在结直肠癌腹膜转移患者中的应用效果。方法选取2021年6月至2023年6月同济大学附属杨浦医院收治的90例结直肠癌腹膜转移患者作为研究对象,按随机数表法分为观察组和对照组各45例。所有患者均接受常规肿瘤细胞减灭术治疗,对照组患者在常规治疗基础上联合腹腔热灌注化疗治疗,共化疗2次,观察组患者在对照组基础上联合自拟健脾益气消癌汤治疗,从术前3 d开始用药,术后患者可进食流质饮食后再持续用药7 d。比较两组患者术后的肛门排气时间、进食时间、住院天数;比较两组患者治疗前、治疗后(出院时)的血清癌胚抗原(CEA)、糖类抗原199(CA199)和T淋巴细胞亚群CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)的变化,并比较两组患者治疗期间的不良反应发生率。结果观察组患者的肛门排气时间、进食时间、住院天数分别为(2.84±0.65)d、(3.27±0.64)d、(7.34±1.58)d,明显短于对照组的(3.55±0.73)d、(3.82±0.56)d、(8.76±1.65)d,差异均有统计学意义(P<0.05);两组患者治疗后的血清CEA、CA199水平比较差异均无统计学意义(P<0.05);治疗后,观察组患者的NLR为3.60±0.67,明显低于对照组的4.11±0.75,CD3^(+)、CD4^(+)、CD4^(+)/CD8^(+)分别为(49.05±5.17)%、(31.06±3.51)%、1.17±0.16,明显高于对照组的(46.06±4.83)%、(29.15±3.72)%、1.08±0.14,差异均有统计学意义(P<0.05);治疗期间,观察组患者的肝肾功能损伤、骨髓抑制、腹胀腹痛、恶心呕吐发生率分别为15.56%、22.22%、26.67%、31.11%,明显低于对照组的35.56%、44.44%、48.89%、55.56%,差异均有统计学意义(P<0.05)。结论自拟健脾益气消癌汤联合腹腔热灌注化疗能改善结直肠癌腹膜转移患者免疫功能,降低化疗相关不良反应发生率。

关键词：结直肠癌腹膜转移腹腔热灌注化疗肿瘤标志物免疫功能不良反应

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

A Numerical Calculation Algorithm of the Inclination Function Based on the Representation of SO(3) Group

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 137-148页

作者： Yu-xiao Wei wen-lin tang Department of Geophysics School of Geology Engineering and GeomaticsChang’An UniversityXi’an710064China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing100190China

In the determination of the Earth gravity field in satellite geodesy, the inclination functions represent the projection of data observed along the orbital plane of a satellite orbit into the sphere in the terrestial reference frame. The inclination functions in this work is studied from a group theoretical perspective. The inclination functions are proved to generate a representation of the SO(3) group. An orthogonal relation of the inclination functions is derived and some recurrence relations for the inclination functions are given, based on which an algorithm to calculate the inclination functions is proposed.

关键词： SO(3)group inclination function satellite geodesy representation of SO(3)

Global output feedback regulation of time-varying nonlinear systems via the dual-gain method

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Science China(Information Sciences) 2024年第5期67卷 333-334页

作者： xian-Long YIN Zong-Yao SUN Changyun wen Institute of Automation Qufu Normal University School of Electrical and Electronic Engineering Nanyang Technological University

Notably, owing to the limited information available, the problem of output feedback stabilization/regulation for nonlinear systems has been explored based on state *** addition, the sensors accounting for state measurement could fail to detect the system states accurately due to the limitations of manufacturing techniques and instruments.

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Projected changes in Köppen-Trewartha climate zones under 1.5-4℃global warming targets over mid-high latitudes of Northern Asia using an ensemble of RegCM4 simulations

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Advances in Climate Change Research 2024年第2期15卷 185-196页

作者： Jie WU Xue-Jie GAO xian-Bing tang Filippo GIORGI School of Geography and Environmental Engineering Gannan Normal UniversityGanzhou 341000China Climate Change Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China University of Chinese Academy of Sciences Beijing 100049China The Abdus Salam International Centre for Theoretical Physics Trieste 34100Italy

Mid-high latitude Northern Asia is one of the most vulnerable and sensitive areas to global warming,but relatively less studied *** used an ensemble of a regional climate model(RegCM4)projections to assess future changes in surface air temperature,precipitation and Köppen-Trewartha(K-T)climate types in Northern Asia under the 1.5-4℃global warming ***4 is driven by five CMIP5 global models over an East Asia domain at a grid spacing of 25 *** of the present day(1986-2005)simulations shows that the ensembles of RegCM4(ensR)and driving GCMs(ensG)reproduce the major characters of the observed temperature,precipitation and K-T climate zones reasonably *** and more realistic spatial detail is found in RegCM4 compared to the driving GCMs.A general warming and overall increases in precipitation are projected over the region,with these changes being more pronounced at higher warming *** projected warming by ensR shows different spatial patterns,and is in general lower,compared to ensG in most months of the year,while the percentage increases of precipitation are maximum during the cold *** future changes in K-T climate zones are characterized by a substantial expansion of Dc(temperature oceanic)and retreat of Ec(sub-arctic continental)over the region,reaching∼20%under the 4℃warming *** most notable change in climate types in ensR is found over Japan(∼60%),followed by Southern Siberia,Mongolia,and the Korean Peninsula(∼40%).The largest change in the K-T climate types is found when increasing from 2 to 3℃.The results will help to better assess the impacts of climate change and in implementation of appropriate adaptation measures over the region.

关键词： Mid-high latitudes of Northern Asia Köppen climate zones Global warming targets Regional climate model