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Persistent mixing bursts in the equatorial Pacific thermocline induced by persistent equatorial waves

Journal of Oceanology and Limnology 2024年第2期42卷 492-510页

作者： Jingjing ZHANG Chuanyu LIU xiang gong Fan WANG School of Mathematics and Physics Qingdao University of Science and TechnologyQingdao 266100China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laoshan Laboratory Qingdao 266237China

A recent study by Liu et al.(2020)suggested that due to the saturation of equatorially trapped planetary waves with different dynamical types,temporal periods,meridional and baroclinic modes,complex layer structures of vertical velocity shear and hence turbulent mixing could frequently occur in the thermocline of the eastern equatorial *** investigated the occurrence of the interior turbulent mixing as indicated by shear instabilities,above the Equatorial Undercurrent(EUC)core at three equatorial sites along 140°W,170°W,and 165°E,respectively,based mainly on data from the Tropical Atmosphere and Ocean(TAO)mooring *** found that turbulent mixing bursts persisted in the thermocline of all three ***,the interior turbulent mixing layers(ITMLs)could occur in probability of approximately 68%,53%,and 48%at the three sites,*** overall occurrence probability shows obvious and similar biannual variations at 140°W and 170°W,which is higher in boreal from late summer to winter and lower in ***,the ITMLs are primarily located above the EUC core and prevail in deeper(shallower)layers from late summer to winter(spring).Most ITMLs(70%)lasted for hours to 3 days,and a few of them(15%)for more than 7 *** thicknesses of ITMLs were concentrated between 15 and 55 *** 165°E,the vertical distribution of ITML occurrence probability was different from that at 140°W and 170°W,as it did not show a preference for depths;the durations of ITMLs are short(also from hours to several days)and their thicknesses were between 5 and 25 *** properties,particularly the high occurrence probability,and short durations demonstrated the persistence of thermocline mixing in the western to eastern equatorial Pacific thermocline and confirmed the generation mechanism by persistent equatorial waves as well.

关键词： interior turbulent mixing layer(ITML) weakly sheared layer(WSL) Equatorial Undercurrent(EUC)core occurrence probability seasonality

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Reinforcement of High Impact Polystyrene by Aramid Nanoparticle Fillers Prepared via an In situ Bottom-up Approach

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Chinese Journal of Polymer Science 2024年第8期42卷 1167-1176页

作者： xiang-Jun gong Zhi-Ping Zhao Chang-Mei Sun Ying Zhang Rong-Jun Qu Ying Wang School of Chemistry and Materials Science Ludong UniversityYantai 264025China

In this work,aramid nanoparticles(ANPs)were prepared in dimethyl formamide(DMF)solution containing high impact polystyrene(HIPS)via a bottom-up *** electron microscopy(TEM)images showed that the obtained ANPs were evenly distributed in the HIPS matrix without any *** composition of the ANPs,i.e.,poly(p-phenyl-p-phenylenediamine)(PPTA),was confirmed by Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS)and X-ray diffractometer(XRD).The ANP/HIPS composites,obtained after ethanol precipitation,were added to neat HIPS as fillers to fabricate ANP/HIPS composite *** surface roughness and the glass transition temperature(T_g)of the sheets were characterized by atomic force microscope(AFM)and differential scanning calorimetry(DSC),*** with neat HIPS,the mechanical properties of the composite sheet were significantly improved,and the Young's modulus increased from 246.55 MPa to 2025.12 MPa,the tensile strength increased from 3.07 MPa to 29.76 MPa,and the toughness increased from 0.32 N/mm^2 to 3.92 N/mm^2,with an increase rate of 721%,869%and 1125%,***,the thermal stability of the composites improved with the increase in ANP content.

关键词： High impact polystyrene PPTA nanoparticle Reinforce Mechanical property

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Blasting induced dynamic stress concentration and failure characteristics of deep-buried rock tunnel

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Journal of Central South University 2024年第7期31卷 2321-2340页

作者： ZHAO Rui TAO Ming xiang gong-liang WANG Shao-feng ZHAO Hua-tao School of Resources and Safety Engineering Central South UniversityChangsha 410083China School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China

In this study,the dynamic stress concentration factors(DSCF)around a straight-wall arch tunnel(SWAT)were solved analytically utilizing the complex variable function methods and Duhamel’s *** effects of wavelength,incident angle,and blasting rising time on the DSCF distribution were *** results pointed out dynamic disturbances resulting in compressive stress concentration in the vertical direction and tensile stress in the incident *** the wavelength and rising time increased,there was a tendency for the amplitude of stress concentration to initially rise and then ***,a series of 3D FEM models were established to evaluate the effect of different initial stress states on the dynamic failure of the tunnel surrounding *** results indicated that the failure of the surrounding rock was significantly influenced by the direction of the static maximum principal stress and the direction of the dynamic *** the coupling of static and blasting loading,damage around the tunnel was more prone to occur in the dynamic and static stress concentration coincidence ***,the damage modes of rock tunnel under static stress and blasting disturbance from different directions were summarized and a proposed support system was *** results reveal the mechanisms of deep-buried rock tunnel destruction and dynamically triggered rockburst.

关键词： stress wave scattering dynamic stress analysis rock tunnel dynamic failure analysis

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基于CFD的具有首翼的新型飞翔形式AUV升力和阻力估计:对阻力极曲线和推力估计的见解

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哈尔滨工程大学学报（英文版） 2024年第2期23卷 352-365页

作者： Faheem Ahmed Xianbo xiang Haotian Wang gong xiang Shaolong Yang School of Naval Architecture and Ocean Engineering Huazhong University of Science and Technology1037Luoyu RoadWuhan 430074China State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and Technology1037Luoyu RoadWuhan 430074China

To achieve hydrodynamic design excellence in Autonomous Underwater Vehicles(AUVs)largely depends on the accurate prediction of lift and drag *** study presents Computational Fluid Dynamics(CFD)-based lift and drag estimations of a novel torpedo-shaped flight-style AUV with *** horizontal bow-wings are provided to accommodate the electromagnetic arrays used to perform the cable detection and tracking operations near the *** hydrodynamic performance of the AUV due to addition of these horizontal bow-wings is required to be investigated,particularly at the initial design ***,CFD techniques are employed to compute the lift and drag forces observed by the flight-style AUV,maneuvering underwater at different angles of attack and varying *** Reynolds-Averaged Navier-Stokes Equations(RANSE)closure is achieved by employing the modified k-ϵ model and Two-Scale Wall Function(2-SWF)approach is used for boundary layer ***,the study also highlights the unique mesh refinement and solution-adaptive meshing techniques to perform the CFD simulations in Solidworks Flow Simulation(SWFS)*** drag polar curve for flight-style AUV with and without bow-wings is generated using the computed lift and drag *** curve provided essential insights for achieving hydrodynamically efficient and optimized AUV *** the drag polar curve,it is revealed that due to horizontal bow-wings,the flight-style AUV is capable to generate higher lift with less drag and thus,it gives better lift-to-drag ratio compared to the AUV without ***,simulated results of axial drag observed by the AUV have also been compared with free-running experimental results and are found in good agreement.

关键词： Autonomous underwater vehicle(AUV) Computational fluid dynamics(CFD) Solidworks flow simulation(SWFS) Drag polar curve Free-running experiments

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Enhancing immunotherapy efficacy against MHC-I deficient triple-negative breast cancer using LCL161-loaded macrophage membranedecorated nanoparticles

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Acta Pharmaceutica Sinica B 2024年第7期14卷 3218-3231页

作者： Wen Zhang Yihui Zhai Ying Cai xiang gong Yunxuan Jiang Rong Rong Chao Zheng Binyu Zhu Helen He Zhu Hao Wang Yaping Li Pengcheng Zhang China State Institute of Pharmaceutical Industry Shanghai 201203China State Key Laboratory of Drug Research&Center of Pharmaceutics Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China School of Biomedical Engineering&State Key Laboratory of Advanced Medical Materials and Devices ShanghaiTech UniversityShanghai 201210China School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing 210023China Yantai Institute of Materia Medica Shandong 264000China State Key Laboratory of Oncogenes and Related Genes Renji-Med-X Stem Cell Research CenterDepartment of UrologyRen Ji HospitalSchool of Medicine and School of Biomedical EngineeringShanghai Jiao Tong UniversityShanghai 200127China University of Chinese Academy of Sciences Beijing 100049China

Current cytotoxic T lymphocyte(CTL)activating immunotherapy requires a major histocompatibility complex I(MHC-I)-mediated presentation of tumor-associated antigens,which malfunctions in around half of patients with triple-negative breast cancer(TNBC).Here,we create a LCL161-loaded macrophage membrane decorated nanoparticle(LMN)for immunotherapy of MHC-I-deficient *** on the macrophage membrane helps LMNs recognize CD47-expressing cancer cells for targeted delivery of LCL161,which induces the release of high mobility group protein 1 and proinflammatory cytokines from cancer *** released cytokines and high mobility group protein 1 activate antitumor immunity by increasing the intratumoral density of the phagocytic macrophage subtype by 15 times and elevating the intratumoral concentration of CTL lymphotoxin by 4.6 *** also block CD47-mediated phagocytosis *** inhibit the growth of MHC-I-deficient TNBC tumors,as well as those resistant to combined therapy of anti-PDL1 antibody and albumin-bound paclitaxel,and prolong the survival of animals,during which process CTLs also play important *** macrophage membrane-decorated nanoparticle presents a generalizable platform for increasing macrophagemediated antitumor immunity for effective immunotherapy of MHC-I-deficient cancers.

关键词： MHC-I deficiency Macrophage CD47 Immunotherapy Triple-negative breast cancer Phagocytosis Immune checkpoint Innate immunity

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坚持“两个毫不动摇”的逻辑理路

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上海经济研究 2024年第6期 31-41页

作者：洪功翔安徽工业大学商学院 243032

坚持“两个毫不动摇”是坚持和完善社会主义基本经济制度的必然要求与具体体现。坚持和完善社会主义基本经济制度,是确保改革开放不犯“颠覆性”错误,建设中国特色社会主义市场经济需要遵循的基本原则。坚持“两个毫不动摇”需要从历史... 详细信息

坚持“两个毫不动摇”是坚持和完善社会主义基本经济制度的必然要求与具体体现。坚持和完善社会主义基本经济制度,是确保改革开放不犯“颠覆性”错误,建设中国特色社会主义市场经济需要遵循的基本原则。坚持“两个毫不动摇”需要从历史维度阐释清楚其必然性,从理论维度阐释清楚其现实可能性,从实践维度阐释清楚确保“两个毫不动摇”政策落地生根的具体路径。

关键词：公有制经济非公有制经济共生发展基本经济制度中国特色社会主义

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A review of the catalytic preparation of mesophase pitch

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新型炭材料（中英文） 2024年第4期39卷 583-610页

作者： MA Zi-hui YANG Tao SONG Yan CHEN Wen-sheng DUAN Chun-feng SONG Huai-he TIAN Xiao-dong gong xiang-jie LIU Zheng-yang LIU Zhan-jun CAS Key Laboratory for Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China College of Material Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China

Because of its high purity and excellent orientation, mesophase pitch is a superior precursor for high-performance car-bon materials. However, the preparation of top-notch mesophase pitch faces challenges. Catalytic polycondensation at low temperat-ures is more favorable for synthesizing mesophase pitch, because it circumvents the high-temperature free radical reaction of other thermal polycondensation approaches. The reaction is gentle and can be easily controlled. It has the potential to significantly im-prove the yield of mesophase pitch and easily introduce naphthenic characteristics into the molecules, catalytic polycondensation is therefore a preferred method of synthesizing highly spinnable mesophase pitch. This review provides a synopsis of the selective pre-treatment of the raw materials to prepare different mesophase pitches, and explains the reaction mechanism and associated research advances for different catalytic systems in recent years. Finally, how to manufacture high-quality mesophase pitch by using a cata-lyst-promoter system is summarized and proposed, which may provide a theoretical basis for the future design of high-quality pitch molecules.

关键词： Mesophase pitch Catalytic polycondensation Lewis-acid Brønsted acid Catalyst-promoter system

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基于主成分分析结合智能感官评价法优化蒜姜复合调味汁配方研究

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中国调味品 2024年第5期49卷 120-123,155页

作者：黄娟贡湘磊江苏旅游职业学院烹饪科技学院江苏扬州225000

为优化蒜姜复合调味汁配方,利用智能感官评价法,选择感官分析、色差分析、电子舌和电子鼻评判蒜姜复合调味汁的品质,基于主成分分析法筛选出决定蒜姜复合调味汁品质的前两个因素;再以这两个因素作为比较系数,在固定生抽酱油体积比5%、... 详细信息

为优化蒜姜复合调味汁配方,利用智能感官评价法,选择感官分析、色差分析、电子舌和电子鼻评判蒜姜复合调味汁的品质,基于主成分分析法筛选出决定蒜姜复合调味汁品质的前两个因素;再以这两个因素作为比较系数,在固定生抽酱油体积比5%、料酒体积比5%的条件下,调整蒜、姜比例,以蒜姜的质量比为1∶1、1∶2、2∶1制作蒜姜复合调味汁,优化蒜姜复合调味汁配方。研究结果表明,电子舌响应值和色差值的累计方差贡献率为99.65%,可用于对蒜姜复合调味汁品质的综合评价。在蒜姜的质量比为1∶2、生抽酱油体积比为5%和料酒体积比为5%的条件下,蒜姜复合调味汁的品质综合评分较高,此款复合调味汁适宜作为腌制复合调料汁使用,适用于肉类和水产品的烹调。

关键词：主成分分析智能感官评价蒜姜复合调味汁

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基于随机森林模型的太阳辐射中长期变化分析

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太阳能学报 2024年第5期45卷 602-610页

作者：贾兴斌汪国菊王仁政宫响青岛科技大学数理学院青岛266061 青岛市人工智能海洋技术创新中心青岛266061 中国海洋大学环境科学与工程学院青岛266100

该文基于多源辐射观测资料,采用随机森林(RF)算法、季节差分自回归移动平均(SARIMA)模型及特征重要性等方法,对山东省济南市太阳辐射长期变化趋势和影响因素进行综合分析。结果显示:RF模型拟合月太阳辐射效果较好,决定系数和平均绝对百... 详细信息

该文基于多源辐射观测资料,采用随机森林(RF)算法、季节差分自回归移动平均(SARIMA)模型及特征重要性等方法,对山东省济南市太阳辐射长期变化趋势和影响因素进行综合分析。结果显示:RF模型拟合月太阳辐射效果较好,决定系数和平均绝对百分比误差分别为0.92和9%,优于SARIMA模型;济南市及周边地区月太阳辐射1980—2020年经历“变暗”到“变亮”的过程,空间呈现西北高东南低的特点;最高温度和日照时数是影响太阳辐射月变化拟合准确度的主要因素,降雨量是导致月太阳辐射总量突变的重要原因,大气污染物中SO2和O3与太阳辐射的相关性最大。

关键词：太阳辐射随机森林特征选择 SARIMA模型拟合分析

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美国中部州“卓越设计”认证标准的特点及启示

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上海教育评估研究 2024年第4期13卷 68-73页

作者：巩翔王敏创新人才教育研究会北京100080 北京市人朝分东坝学校北京100018

以美国中部各州中小学联合会(MSA)的“卓越设计”认证协议为例,探讨美国中小学认证标准的特点,介绍了MSA“卓越设计”认证标准的构成,包括五条认证标准和23个核心概念,以及学校提升和改进计划。指出美国中小学认证标准具有以理念目标为... 详细信息

以美国中部各州中小学联合会(MSA)的“卓越设计”认证协议为例,探讨美国中小学认证标准的特点,介绍了MSA“卓越设计”认证标准的构成,包括五条认证标准和23个核心概念,以及学校提升和改进计划。指出美国中小学认证标准具有以理念目标为核心、以学生发展为根本、以自愿平等为前提、以循证研究为方法、以广泛受益为共识等特征。从学校、认证机构、技术变革和教育评价的角度提出了对认证标准的探讨,指出可以参考和借鉴MSA的学校认证标准,构建多元主体参与、符合中国实际、具有世界水平的教育评价体系。

关键词：学校认证认证标准卓越设计教育质量学生发展

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