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Modelling and validation of flash flood inundation in drylands

Journal of Geographical Sciences 2024年第1期34卷 185-200页

作者： gao dan YIN Jie WANG dandan YANG Yuhan LU Yi CHEN Ruishan School of Geographic Sciences East China Normal UniversityShanghai 200241China Key Laboratory of Geographic Information Science of Ministry of Education East China Normal UniversityShanghai 200241China National Disaster Reduction Center of China Ministry of Emergency Management of People's Republic of ChinaBeijing 100124China School of Design Shanghai Jiao Tong UniversityShanghai 200240China

In the context of climate change and human activities,flood disasters in arid mountainous areas have become increasingly frequent,and seriously threatened the safety of people's lives and *** and accurate flash flood inundation modelling is an essential foundational research area,which can aid in the reduction of casualties and the minimization of disaster losses;however,this modelling is also very difficult,and models need to be urgently developed to address flash flood forecasting and *** objective of this study is to construct a numerical modelling method for flash floods in *** on a 2D high-resolution flood numerical model(Flood Map-Hydro Inundation2D),we hindcasted the dynamic process of flash flooding and show the spatio-temporal characteristics of flash flood inundation for the“8·18”flash flood disaster that occurred in Datong county,Qinghai *** results showed that the model output effectively agreed with the observed inundation after the event in terms of both spatial extent and temporal *** flooding mainly occurred between 00:00 and 01:00 on August 18,***,Hejiazhuang and Longwo villages were affected most *** further conducted model sensitivity analysis and found that the model was highly sensitive to both roughness and hydraulic conductivity in drylands,and the effect of hydraulic conductivity was more *** study confirmed the good performance of our model for the simulation of flash flooding in arid areas and provides a potential method for flash flood assessment and management in arid areas.

关键词： flash flood numerical modelling arid areas Datong county Flood Map-Hydro Inundation2D

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Numerical investigations of the interactions between bubble induced shock waves and particle based on OpenFOAM

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Journal of Hydrodynamics 2024年第2期36卷 355-362页

作者： Jia-xin Yu Jin-sen Hu Yu-hang Liu Yi-fan Liu dan gao Yu-ning Zhang Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of EducationSchool of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

The presence of particles and the shock waves generated by the cavitation bubbles can significantly affect the safety and the performance of hydrodynamic *** the present paper,the shock waves generated by cavitation bubble collapsing near the particle are numerically investigated based on the OpenFOAM together with the numerical schlieren for the shock wave *** numerical results reveal that the stand-off distance is one of the paramount factors affecting the interactions between the particle and the shock *** different kinds of shock waves(e.g.,bubble-inception,jet formation,particle reflected and jet-split shock waves)are observed during the bubble collapsing near the *** stand-off distance smaller than 0.5 or larger than 1.1,the maximum pressure at particle surface generated by the bubble growth can surpass those of the collapse stage.

关键词： Particle-bubble interaction shockwaves jetdynamics

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Metabolomic Analysis in Saliva and Different Brain Regions of Older Mice with Postoperative Delirium Behaviors

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Biomedical and Environmental Sciences 2024年第2期37卷 133-145页

作者： LIU Xiao CAO Ying LIN Xiao Wan gao dan Yang MIAO Hui Hui LI Tian Zuo Department of Anesthesiology Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China

Objective Postoperative delirium(POD)has become a critical challenge with severe consequences and increased incidences as the global population ***,the underlying mechanism is yet *** study aimed to explore the changes in metabolites in three specific brain regions and saliva of older mice with postoperative delirium behavior and to identify potential non-invasive *** Eighteen-month-old male C57/BL6 mice were randomly assigned to the anesthesia/surgery or control *** tests were conducted 24 h before surgery and 6,9,and 24 h after *** C3(C3)and S100 calcium-binding protein B protein(S100beta)levels were measured in the hippocampus,and a metabolomics analysis was performed on saliva,hippocampus,cortex,and amygdala *** In total,43,33,38,and 14 differential metabolites were detected in the saliva,hippocampus,cortex,and amygdala,respectively.“Pyruvate”“alpha-linolenic acid”and“2-oleoyl-1-palmitoy-snglycero-3-phosphocholine”are enriched in one common pathway and may be potential non-invasive biomarkers for *** changes were observed in the three brain regions,with the upregulation of 1-methylhistidine and downregulation of *** Dysfunctions in energy metabolism,oxidative stress,and neurotransmitter dysregulation are implicated in the development of *** identification of changes in the level of salivary metabolite biomarkers could aid in the development of noninvasive diagnostic methods for POD.

关键词： Metabolomic Postoperative delirium(POD) Mechanism Biological marker

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Provenance of Upper Jurassic in North Yellow Sea Basin， Eastern North China Craton

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Journal of Earth Science 2024年

作者： Haitian Yu Zhongjie Xu Rihui Cheng Duo Wan dan gao Zhen Zhang College of Earth Sciences Jilin University 2. Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural Resources College of Palaeontology Shenyang Normal University Guangzhou Marine Geological Survey

Base on the detrital zircon U-Pb dating data， this paper discusses the provenance and constructs source-to-sink system of the Upper Jurassic in the North Yellow Sea Basin (NYSB)， Eastern North China Craton (ENCC). In addition， to avoid the bias of detrital zircon ages caused by variations in zircon fertility， we gather 1709 whole rock zirconium content values (ppm) from granitic rocks with different ages in the North China Craton (NCC). Base on mean Zr content of granitic rocks in each age， these granitic rocks can be divided into four groups: Group A consists of Jurassic， Group B consists of Paleozoic， Neo-Mesoproterozoic and Neoarchean， Group C consists of Early Cretaceous and Triassic， and Group D consists of Paleoproterozoic. This research assigns these groups zircon fertility factors (ZFF) of 1， 1.4， 1.8 and 2.2. The U-Pb age of detrital zircons from Late Jurassic sediments corrected by ZFF are statistically analyzed (K-S test， Similarity， Cross-correlation， Linkeness， Multidimensional scaling). And combining with palaeocurrent and palaeogeography， we construct two source-to-sink systems: 1) Jiaodong Uplift and Sulu Orogenic belt as the source area and the North Yellow Sea Basin as the sink area; 2) Liaodong Peninsula as the source area and the North Yellow Sea Basin as the sink area.

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In situ photoelectric biosensing based on ultranarrowband near-infrared plasmonic hot electron photodetection

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Advanced Photonics 2024年第2期6卷 81-89页

作者： Xianghong Nan Wenduo Lai Jie Peng Haiquan Wang Bojun Chen Huifan He Zekang Mo Zikun Xia Ning Tan Zhong Liu Long Wen dan gao Qin Chen Jinan University College of Physics & Optoelectronic Engineering Institute of Nanophotonics Guangdong Provincial Key Laboratory of Nanophotonic Manipulation Tsinghua University Shenzhen International Graduate School State Key Laboratory of Chemical Oncogenomics Jinan University College of Life Science and Technology

Narrowband photodetection is an important measurement technique for material analysis and sensing, for example, nondispersive infrared sensing technique. Both photoactive material engineering and nanophotonic filtering schemes have been explored to realize wavelength-selective photodetection,while most devices have a responsive bandwidth larger than 2% of the operating wavelength, limiting sensing performance. Near-infrared photodetection with a bandwidth of less than 0.2% of the operating wavelength was demonstrated experimentally in Au/Si Schottky nanojunctions. A minimum linewidth of photoelectric response down to 2.6 nm was obtained at a wavelength of 1550 nm by carefully tailing the absorptive and radiative loss in the nanostructures. Multiple functions were achieved on chip with the corrugated Au film, including narrowband resonance, light harvesting for sensing and photodetection, and electrodes for hot electron emission. Benefiting from such a unity integration with in situ photoelectric conversion of the optical sensing signal and the ultranarrowband resonance, self-contained on-chip biosensing via simple intensity interrogation was demonstrated with a limit of detection down to 0.0047%in concentration for glucose solution and 150 ng∕m L for rabbit IgG. Promising potential of this technique is expected for the applications in on-site sensing, spectroscopy, spectral imaging, etc.

关键词： Photodetectors Plasmonics Biosensing Optical gratings Gold Absorption spectrum Acoustooptic tunable filters Absorption Sensors In situ remote sensing

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浅谈高速公路改扩建中新旧路面接缝处理技术

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建筑与装饰 2024年第8期 130-132页

作者：高丹中铁十二局集团第一工程有限公司陕西西安 710000

伴随国内经济的高速发展,已有一些旧公路无法满足社会经济发展以及人们日常的交通出行需求,在此背景下,各地都在大力推行公路改扩建工程.其中,高速公路的改扩建中,新旧路面拼接方式应用较为广泛.为了更有效地解决新旧路面病害问题,本文... 详细信息

伴随国内经济的高速发展,已有一些旧公路无法满足社会经济发展以及人们日常的交通出行需求,在此背景下,各地都在大力推行公路改扩建工程.其中,高速公路的改扩建中,新旧路面拼接方式应用较为广泛.为了更有效地解决新旧路面病害问题,本文针对新旧路面接缝处理技术进行了分析,以期促进高速公路改扩建施工效果的提升,创造更高的社会与经济效益.

关键词：高速公路改扩建新旧路面接缝处理技术

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历史、现实、未来：中国式教育现代化的三重向度

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现代交际 2024年第4期 101-110+124页

作者：高丹西南大学

中国式教育现代化作为中国式现代化在教育方面的集中表达，对实现精神共富具有重大的战略意义。为此，本文以宏阔的历史视野认清中国式教育现代化的文化基因和百余年的探索脉络，继而从教育公平问题、教育糟粕观念、质量与规模之间的矛... 详细信息

中国式教育现代化作为中国式现代化在教育方面的集中表达，对实现精神共富具有重大的战略意义。为此，本文以宏阔的历史视野认清中国式教育现代化的文化基因和百余年的探索脉络，继而从教育公平问题、教育糟粕观念、质量与规模之间的矛盾三方面分析推进中国式教育现代化的现实困境，并提出以数字化转型推动教育共建共治共享、以问题导向提高教育治理能力现代化水平、以守正创新把准古与今、中与外的关系等未来发展路径；科学阐释中国式教育现代化的三重时空向度，为实现中国特色世界水平的现代教育厘清方向。

关键词：中国式教育现代化教育现代化传统教育未来指向

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高速公路改扩建工程路面施工关键技术探讨

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建筑与装饰 2024年第10期 172-174页

作者：高丹中铁十二局集团第一工程有限公司陕西西安 710000

道路交通是国民经济体系的重要支柱之一.随着社会经济形势的创新发展,许多已投运多年的交通路网已不满足现代社会经济体系的需求.此时,根据新经济体系的要求,开展高速公路的改扩建工程是极有必要的.而高速公路改扩建工程的路面施工,关... 详细信息

道路交通是国民经济体系的重要支柱之一.随着社会经济形势的创新发展,许多已投运多年的交通路网已不满足现代社会经济体系的需求.此时,根据新经济体系的要求,开展高速公路的改扩建工程是极有必要的.而高速公路改扩建工程的路面施工,关系到工程的建设质量,其中涉及多项关键施工技术,工程较为复杂、难度较高.基于此,文章以樟树至吉安高速公路改扩建工程为例,对高速公路改扩建工程中路面施工所用的关键技术做出了讨论与分析.

关键词：高速公路改扩建工程路面施工关键技术

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曲妥珠单抗阳离子交换色谱过程机理模型建立及其应用

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药学学报 2024年第5期59卷 1391-1398页

作者：李乐仪阎续焦静雨高丹高栋瞿海斌浙江大学药学院药物信息学研究所浙江杭州310058 海正生物制药有限公司浙江杭州311404

阳离子交换色谱作为一种常用的生物制药分离和纯化技术,常用于单抗的下游生产过程以分离电荷异质体。对于电荷异质体种类复杂、分离度低的样品,基于紫外数据的收集方式无法明确各异质体的组成,因此无法直接确定合并范围,仍需进行繁琐的... 详细信息

阳离子交换色谱作为一种常用的生物制药分离和纯化技术,常用于单抗的下游生产过程以分离电荷异质体。对于电荷异质体种类复杂、分离度低的样品,基于紫外数据的收集方式无法明确各异质体的组成,因此无法直接确定合并范围,仍需进行繁琐的馏分分析来指导产品收集。本文对目标单抗关键组分的阳离子交换色谱过程建立机理模型,并辅助于产品收集。该模型可以准确预测电荷异质体的洗脱峰形状,且真实值与预测值的均方根误差小于0.009。与基于在线紫外的收集方式相比,模型辅助收集方式不仅能够可视化洗脱过程,并且在保证产品合格率的情况下可提高相对产率4倍。

关键词：单克隆抗体曲妥珠单抗电荷异质体纯化机理模型

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数字人文视域下中国古代农耕图像知识组织研究

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图书馆杂志 2024年第1期43卷 109-117页

作者：高丹徐健何琳桂思思南京农业大学信息管理学院南京农业大学人文与社会计算研究中心

基于农耕图像历史及文化价值深度挖掘的目标,文章探讨了数字时代农耕图像知识组织的建设现状、特征、原型系统、存在问题与应用前景,为提出数字人文视角下农耕图像研究的新范式提供参考。通过文献调研法和案例分析法,本文梳理了国内外... 详细信息

基于农耕图像历史及文化价值深度挖掘的目标,文章探讨了数字时代农耕图像知识组织的建设现状、特征、原型系统、存在问题与应用前景,为提出数字人文视角下农耕图像研究的新范式提供参考。通过文献调研法和案例分析法,本文梳理了国内外典型的图像资源组织案例,结合农耕图像特征,提出一种面向农耕图像资源知识组织的4层架构原型系统。该框架揭示了中国古代农耕图像的资源加工层、图像标注层、数据关联层、应用服务层的实现路径。同时,本文还提出农耕图像资源知识组织待解决的关键问题,并对其应用价值进行展望,以期为相关文化遗产和数字人文项目提供参考与借鉴。

关键词：农耕图像数字人文知识组织原型系统

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