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Feasibility Study on Recovering Human-Occupied Vehicle with An Offshore Crane

China Ocean Engineering 2024年第4期38卷 648-662页

作者： han ming-yue XIE Peng XIAN Hao-yi ZHONG Xin-xin CHEN Sheng-lin SUN Tie-rui SUN Feng-lei School of Ocean Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Key Laboratory of Comprehensive Observation of Polar Environment(Sun Yat-sen University) Ministry of EducationZhuhai 519082China Guangzhou Marine Engineering Corporation Guangzhou 510250China

Launching and recovering human-occupied vehicles(HOVs)has always been a challenging *** current recovery process requires staff to manually complete the tethering task,which is inefficient and endangers the lives of *** paper suggests moving the recovery position from the surface to underwater at approximately half the wavelength of the water depth(30−50 m underwater),where the HOV experiences less environmental *** ROV equipped with a ultra-short baseline beacon(USBL)and a manipulator was used to complete the tethering ***,a shackle customized to the shape of the manipulator’s gripper is fitted to the end of the cable to simplify the tethering *** investigate the dynamic response of recovering the HOV using this suggested method,a comprehensive numerical model is developed in this *** effects of wind,surface waves,ocean currents,and nonlinear interaction between the installation vessel and the HOV are quantitatively *** results show that the proposed recovery method can reduce the motion amplitude of the HOV and that the wave has the greatest influence on the dynamic response of the HOV during the recovery *** model provides better insight into the proposed HOV recovery method and confirms the effectiveness of the heave compensation *** proposed approach aims to enhance safety and operational efficiency by reducing direct human involvement in the recovery process and mitigating potential *** finding holds particular significance,especially in environmentally sensitive areas,where reducing the impact on the surrounding ecosystem is crucial.

关键词： human-occupied vehicle recovery dynamic response active heave compensation

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急性代谢性酸中毒的病因识别及管理

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中国实用内科杂志 2024年第5期44卷 373-379页

作者：韩明月刚晓坤吉林大学白求恩第一医院内分泌代谢科吉林长春130012

代谢性酸中毒是临床常见的酸碱失衡,根据酸中毒发生发展的时间,可进一步分为急性和慢性代谢性酸中毒。急性代谢性酸中毒在重症患者中更为常见,其病因复杂多样,也可作为其他疾病的严重并发症。急性代谢性酸中毒可累及多个器官和系统,严... 详细信息

代谢性酸中毒是临床常见的酸碱失衡,根据酸中毒发生发展的时间,可进一步分为急性和慢性代谢性酸中毒。急性代谢性酸中毒在重症患者中更为常见,其病因复杂多样,也可作为其他疾病的严重并发症。急性代谢性酸中毒可累及多个器官和系统,严重者可危及生命。准确识别病因,采取及时有效的手段进行干预,可降低重症患者不良事件的发生率。文章从临床的角度总结急性代谢性酸中毒的原因及其管理情况,以期为临床急性代谢性酸中毒的诊治提供思路。

关键词：急性代谢性酸中毒病因管理

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国债利率期限结构与货币政策传导机制研究——基于利率市场化与货币政策转型的双重视角

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当代金融研究 2024年第6期 47-64页

作者：李程韩明月天津工业大学经济与管理学院天津300387

构建Nelson-Siegel模型拟合国债利率期限结构曲线的水平因子、斜率因子和曲率因子,在此基础上构建TVP-VAR模型,探究数量型和价格型货币政策框架下基于国债利率期限结构曲线的货币政策传导机制,并研究利率市场化对传导有效性的作用。实... 详细信息

构建Nelson-Siegel模型拟合国债利率期限结构曲线的水平因子、斜率因子和曲率因子,在此基础上构建TVP-VAR模型,探究数量型和价格型货币政策框架下基于国债利率期限结构曲线的货币政策传导机制,并研究利率市场化对传导有效性的作用。实证研究表明:价格型和数量型货币政策对国债水平因子作用相同,但对斜率因子作用不同,通过斜率因子对金融市场利率和货币供给量的传导和通过水平因子的传导都具有相反的作用,说明政策利率通过国债斜率因子的传导仍存有阻塞;我国数量型货币政策传导机制仍能发挥一定作用,但传导有效性也逐渐减弱,随着利率市场化的推进,价格型货币政策传导有效性逐渐增强,但仍有局限性。对此,应该进一步完善国债收益率曲线,更好发挥国债收益率曲线的定价基准作用,推进利率市场化改革,加快疏通货币政策传导梗阻,并加快货币政策转型。

关键词：国债利率期限结构货币政策传导机制利率市场化 TVP-VAR模型

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C_(3)产业链高质量发展研究及建议

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化学工业 2024年第1期42卷 1-6页

作者：双玥夏静怡韩月明石油和化学工业规划院北京100013

分析预测了我国丙烯及其衍生物聚丙烯、丙烯腈、丙烯酸、苯酚/丙酮、环氧丙烷、丁辛醇等的市场供需情况;指出了我国C_(3)产业链产能全面过剩的原因;提出了新形势下进入C_(3)产业链的切入点、高质量发展建议。

关键词：丙烯及其衍生物 C_(3)产业链市场分析预测高质量发展建议

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我国润滑油基础油生产结构变化研究

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化学工业 2024年第2期42卷 22-28,34页

作者：伍洛毕孟川张海桐韩月明黄辰石油和化学工业规划院北京100013 濮阳市科学技术研究院河南457000

文章介绍了我国润滑油基础油生产现状,重点分析了各类基础油的工艺技术和生产情况,并对基础油生产结构发展方向进行了展望。

关键词：基础油工艺技术市场供需展望

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Effect of austenitizing condition on mechanical properties,microstructure and precipitation behavior of AISI H13 steel

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Journal of Iron and Steel Research(International) 2024年第1期31卷 143-156页

作者： An-gang Ning Yang Liu Rui Gao Stephen yue ming-bo Wang han-jie Guo College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024ShanxiChina Department of Mining and Materials Engineering McGill UniversityMontrealQCH3A 0C5Canada ASSAB Tooling Technology(Chongqing)Co. Ltd.Chongqing401120China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The effects of austenitizing temperature(1223,1303,and 1373 K)and holding time(1-1500 s)on the microstructure,mechanical properties,and precipitation behavior of the H13 hot work die steel were *** results indicate a softening phenomenon when H13 steel is austenitized at 1303 K beyond 900 s and 1373 K beyond 600 s,*** the sample held for 1200 s,the tensile strength is found capable of reaching up to 2.2 GPa when quenched from a temperature above 1303 ***,prior-austenite grain size increases with the increase in austenitizing *** kinetic behavior of the precipitates(mainly MC-type carbides)in H13 steel could be elaborated through the principles set forth by the Arrhenius and Avrami ***,the comprehensive strengthening of the H13 steel was discussed in *** results show that the activation energy of the transformed fraction of carbides is higher than that of the diffusion process for common alloying elements(Cr,V,Mo,and Ni)found in the *** suggests that it would be difficult for precipitates to dissolve into the matrix when H13 steel is austenitized at high *** the increasing austenitizing temperature,the precipitation fraction decreases,and the dislocation density *** dislocation strengthening is regarded as the dominant strengthening contributed to yield strength in as-quenched H13 steel.

关键词： H13 steel Austenitizing Mechanical property Precipitation behavior Comprehensive strengthening

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Complete kinetic model for esterification reaction of lauric acid with glycerol to synthesize glycerol monolaurate

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Chinese Journal of Chemical Engineering 2024年第6期70卷 211-221页

作者： han-Qiao Hu yue Zhang ming Fan Yong Cai Guang-Wen Chu Liang-Liang Zhang Research Center of the Ministry of Education for High Gravity Engineering and Technology Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Petrochemical Research Institute China National Petroleum CorporationBeijing 102206China

Glycerol monolaurate(GML)is a widely used industrial chemical with excellent emulsification and antibacterial *** direct esterification of glycerol with lauric acid is the main method to synthesize *** this work,the kinetic process of direct esterification was systematically studied using p-toluenesulfonic acid as catalyst.A complete kinetic model of consecutive esterification reaction has been established,and the kinetic equation of acid catalysis was *** isomerization reactions of GML and glycerol dilaurate were *** was found that the reaction was an equilibrium reaction and the reaction rate was faster than the esterification *** kinetic equations of the consecutive esterification reaction were obtained by experiments as k_(1)=(276+92261Xcat)exp(-37720/RT)and k_(2)=(80+4413Xcat)exp(-32240/RT).The kinetic results are beneficial to the optimization of operating conditions and reactor design in GML production process.

关键词： Glycerol monolaurate p-Toluenesulfonic acid Esterification Kinetics Mass transfer

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河南省泌阳县崩滑流灾害孕灾地质条件分析

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地下水 2024年第2期46卷 134-136页

作者：黄凯李亚娟贾方建郭丽丽韩明月吴祖成河南省地质矿产勘查开发局第五地质勘查院河南郑州450001

为分析泌阳县地质灾害孕育、形成的地质环境条件,深化地质灾害早期识别、形成机理和规律认识,在地质灾害风险调查成果的基础上,分别对崩塌、滑坡、泥石流进行孕灾地质条件分析。针对地形地貌、地质构造、工程地质岩组、斜坡结构、水文... 详细信息

为分析泌阳县地质灾害孕育、形成的地质环境条件,深化地质灾害早期识别、形成机理和规律认识,在地质灾害风险调查成果的基础上,分别对崩塌、滑坡、泥石流进行孕灾地质条件分析。针对地形地貌、地质构造、工程地质岩组、斜坡结构、水文地质条件、人类工程活动等孕灾因子进行分析。研究结果表明,崩塌、滑坡主要孕灾因子为地形地貌、工程地质岩组及斜坡结构;泥石流主要孕灾因子为地形地貌和工程地质岩组。结合主要孕灾因子,将全县划分为四个孕灾大区及若干小区,并对各分区孕灾地质条件进行详细论述,阐明不同分区内主要孕灾因素。

关键词：泌阳县崩滑流孕灾地质条件孕灾地质条件分区

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Electricity Pricing with Continuous-time Commodity Model and Non-monotonic Load Curve

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 272-280页

作者： Lijia han yue Li Haoyong Chen Ningning Lu Mathematical and Physical Science School North China Electric Power UniversityBeijing 102206China School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Under the "carbon peak and carbon neutrality"background,clean energy enters the market on a large scale,so it is very important to study the pricing theory of *** bright spot of this paper is that the load curve is more *** the original version of electricity pricing theory based on continuous time commodity model,the load curve is supposed to be a monotonic function with time for simplicity of derivation,which is not *** overcome this defect,load curves are supposed to be in shapes of a unimodal model and multimodal cases in this paper,which are more in conformity with the actual load curve in real-world power *** study cases are used to demonstrate the rationality of the proposed *** results together with the authors'previous work provide a complete pricing scheme for continuous-time electricity commodity model.

关键词： Functional optimization market equilibrium spot pricing variational method

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Slip distribution inversion of seismic sub-fault dip iteration using gradient based optimizer algorithm

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Geodesy and Geodynamics 2024年第2期15卷 114-121页

作者： Leyang Wang han Li ming Pang Key Laboratory of Mine Environmental Monitoring and Improving Around Poyang Lake of Ministry of Natural Resources East China University of TechnologyNanchang 330013China School of Surveying and Geoinformation Engineering East China University of TechnologyNanchang 330013China College of Resources and Environment Shandong Agricultural UniversityTaian 271018China

This paper considers setting different dips for different sub-faults to fit the actual rupture situation based on the fault rupture of the 2013 Lushan M_(S)7.0 ***,combined with the coseismic GNSS data of the Lushan earthquake,the source parameters and sliding distribution of the Lushan earthquake fault are ***,we use the gradient based optimizer(GBO)in nonlinear inversion to obtain the source parameters of this seismic *** inversion results indicate that the strike of the fault is 206.52°,the dip is 44.10°,the length is 21.92 km,and the depth is 12.79 *** refine the sliding distribution of the seismic fault,the seismic fault is divided into 3×3 ***,we fix the central sub-fault dip of 44.10°;the dip of other sub-faults is obtained by *** that,the model is further divided into a fault layer model composed of 23×19 sub fault slices,and using the Matlab fitting function is used to fit the dip of the 23×19 sub ***,the Lushan seismic fault plane is established as a shovel structure with steep upper and gentle lower,steep south and gentle *** slip distribution inversion results indicate that the depth of the slip peak is 13 km,the corresponding maximum slip momentum is 0.67 m,the seismic moment is 1.10×10^(19)N·m and the corresponding moment magnitude is *** results above are consistent with the research results of seismology.

关键词： Gradient basedoptimizer(GBO) Lushan earthquake Non-planefault model Slid distribution

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