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Empirical mode decomposition of multiphase flows in porous media:characteristic scales and speed of convergence

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Petroleum Science 2020年第1期17卷 153-167页

作者： Nicolás Echebarrena Pablo D.Mininni Gustavo A.Moreno YPF-Technology EnsenadaBuenos AiresArgentina CONICET Buenos AiresArgentina Physics Department IFIBASchool of Exact and Natural SciencesUniversity of Buenos AiresCONICETUniversity Campus1428 Buenos AiresArgentina

We apply a proper orthogonal decomposition(POD)to data stemming from numerical simulations of a fingering instability in a multiphase flow passing through obstacles in a porous medium,to study water injection processes in the production of hydrocarbon *** show that the time evolution of a properly defined flow correlation length can be used to identify the onset of the fingering *** of characteristic lengths for each of the modes resulting from the POD provides further information on the dynamics of the ***,using numerical simulations with different viscosity ratios,we show that the convergence of the POD depends non-trivially on whether the fingering instability develops or *** result has implications on proposed methods to decrease the dimensionality of the problem by deriving reduced dynamical systems after truncating the system’s governing equations to a few POD modes.

关键词： Two-phase flow Empirical mode decomposition Viscous fingering Porous media

Key changes across valley floors in mountain areas affected by different levels of human impact: a case study of the Ochotnica river catchment in the Polish Carpathians

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Journal of Mountain Science 2024年第11期21卷 3567-3583页

作者： Agata GOŁĄB Anna MICHNO Doctoral School of exact and Natural sciences Jagiellonian UniversityProf.St.Łojasiewicza St 11Cracow 30348Poland Faculty of Geography and Geology Jagiellonian UniveristyGronostajowa St 3Cracow 30387Poland

The goal of this paper was to present knowledge on changes in the morphodynamic structure of the Ochotnica River(Polish Carpathians)and transformations within its active river zone since the end of the 19th *** study used a set of archival and contemporary cartographic materials and the results of three-fold field mapping of the morphodynamic structure of the *** and indirect human interference with the natural environment of the catchment and the fluvial system was taken into account in the *** of changes in the morphodynamic structure of the Ochotnica and its active river zone since the end of the 19th century indicated significant changes in the development trend of the *** contemporary structure of the Ochotnica is more complex than in the *** has been a fragmentation of the riverbed into sections with different morphodynamic *** proportion of erosive sections has increased,which explains the reduced in the width of the active river zone of the *** average width of the active river zone of the river between 1861 and 2022 has changed from 80 m to 18 *** impact has been identified as the main reason for the changes in the morphodynamic structure of the riverbed and its active river ***,only the unregulated sect ion is characterised by free lateral migration of the riverbed and the widest active river zone(~28 m).

关键词： Active river zone Channel changes Mountain river Human impact

The design and application of BIM+refined management and control platform for the Jingxiong railway bridge

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High-Speed Railway 2023年第3期1卷 211-218页

作者： Jinghan Zhang Jiayu Li Beisheng Liu Hui Li Wei Yang China Academy of Railway sciences corporation Limited Beijing 100081China

The high-speed railway construction involves multiple professional fields,such as railway design,construction,and *** paper architects the"BIM+"project refined management platform,designs the platform's logical architecture,physical architecture,and solves several key technology ***"BIM+"platform has been applied on the Jingxiong Bridge Project and achieved all-round,whole-process and multi-management of high-speed railway engineering *** significantly improves the level of construction management,and plays a role in promoting the development of high-speed railway construction informatization.

关键词： Informatization The Jingxiong Bridge Project Platform architecture GIS(Geographic Information System) BIM(Building Information Modelling)

Design and implementation of railway green performance basic data collection system

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High-Speed Railway 2023年第4期1卷 265-272页

作者： Xiangru Lyu Hui Li China Academy of Railway sciences corporation Limited Beijing 100081China

This study addressed the issues related to the collection and management of basic data for railway green performance. A railway green performance basic database has been constructed based on metadata and data exchange schemas. A data classification system has been established from the perspectives of businesses, processes,and entities. A BIM(Building Information Modelling) model data extraction scheme is proposed based on field similarity matching and a document content extraction scheme is proposed based on image recognition. A railway green performance basic data collection system has been developed, achieving efficient collection and integrated management of railway green performance basic data. This system can provide data support for applications such as railway carbon emissions accounting, green cost-benefit analysis, and evaluation of green design solutions.

关键词： Railway Green performance Data collection Metadata Data classifcation BIM Image recognition

Tectono-thermal modeling of the Yinggehai Basin,South China Sea

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Science China Earth sciences 2001年第1期44卷 7-13页

作者：何丽娟熊亮萍汪集旸杨计海董伟良 Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China China Offshore Oil Nanhai West corporation Zhanjiang China

Based on the observed data, the average value of surface heatflow in the Yinggehai Basin is calculated and it turns out to be 84.1 mW/m2. The thermal evolution of the basin since the Cenozoic era has been attempted by tectono-thermal modeling. Three-phase extension made the basin become hotter and hotter, reaching its climax in paleo-temperature history since 5.2 Ma. And nowadays, the basin is in the heat flow decreasing period. During the Cenozoic era, the basement heat flow remained at 50-70 mW/m2 all the time. This is related to the degree of each extension phase, stretching rate mode and also the limited basin scale. Modeling results also show that, the surface heat flow is controlled mainly by the basement heat flow, and less than 20% comes from radiogenic heat production in the sediments of the basin.

关键词： tectono-thermal modeling the Yinggehai Basin South China Sea

Rose without prickle: genomic insights linked to moisture adaptation

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National Science Review 2021年第12期8卷 74-85页

作者： Mi-Cai Zhong Xiao-Dong Jiang Guo-Qian Yang Wei-Hua Cui Zhi-Quan Suo Wei-Jia Wang Yi-Bo Sun Dan Wang Xin-Chao Cheng Xu-Ming Li Xue Dong Kai-Xue Tang De-Zhu Li Jin-Yong Hu CAS Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences University of Chinese Academy of sciences Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of Sciences Flower Research Institute Yunnan Agricultural Academy of Sciences Biomarker Technologies corporation

Prickles act against herbivores, pathogens or mechanical injury, while also preventing water loss. However,whether prickles have new function and the molecular genetics of prickle patterning remain poorly explored. Here, we generated a high-quality reference genome assembly for ‘Basye’s Thornless’(BT), a prickle-free cultivar of Rosa wichuraiana, to identify genetic elements related to stem prickle *** BT genome harbors a high level of sequence diversity in itself and with cultivar ‘Old Blush’(R. chinensis), a founder genotype in rose domestication. Inheritance of stem prickle density was determined and two QTL were identified. Differentially expressed genes in QTL were involved in water-related functions, suggesting that prickle density may hitchhike with adaptations to moist environments. While the prickle-related gene-regulatory-network(GRN) was highly conserved, the expression variation of key candidate genes was associated with prickle density. Our study provides fundamental resources and insights for genome evolution in the Rosaceae. Ongoing efforts on identification of the molecular bases for key rose traits may lead to improvements for horticultural markets.

关键词： Rosa wichuraiana ‘Basye's Thornless’ prickle-free water storage gene-regulatory-network (GRN) QTL

The effect of oxygen plasma ashing on the resistance of TiN bottom electrode for phase change memory

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Journal of Semiconductors 2015年第5期36卷 181-186页

作者：高丹刘波李莹宋志棠任万春李俊焘许震吕士龙朱南飞任佳栋詹奕鹏吴汉明封松林 State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Micro-System and Information TechnologyChinese Academy of Sciences University of Chinese Academy of sciences Semiconductor Manufacturing International corporation

Phase change memory （PCM） has been regarded as a promising candidate for the next generation of nonvolatile memory. To decrease the power required to reset the PCM cell, titanium nitride （TIN） is preferred to be used as the bottom electrode of PCM due to its low thermal and suitable electrical conductivity. However, during the manufacture of PCM cell in 40 nm process node, abnormally high and discrete distribution of the resistance of TiN bottom electrode was found, which might be induced by the surface oxidation of TiN bottom electrode during the photoresist ashing process by oxygen plasma. In this work, we have studied the oxidation of TiN and found that with the increasing oxygen plasma ashing time, the thickness of the TiO2 layer became thicker and the state of the TiO2 layer changed from amorphous to crystalline, respectively. The resistance of TiN electrode contact chain with 4-5 nm TiO2 layer was confirmed to be almost three-orders of magnitude higher than that of pure TiN electrode, which led to the failure issue of PCM cell. We efficiently removed the oxidation TiO2 layer by a chemical mechanical polishing （CMP） process, and we eventually recovered the resistance of TiN bottom electrode from 1×10^5Ω/via back to 6×10^2 Ωvia and successfully achieved a uniform resistance distribution of the TiN bottom electrode.

关键词： PCM oxygen plasma ashing titanium nitride bottom electrode oxidation CMP

Spatially resolved measurement of plasmon dispersion using Fourier-plane spectral imaging

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Photonics Research 2018年第6期6卷 653-658页

作者： AMIR OHAD KATHERINE AKULOV ERAN GRANOT URI ROSSMAN FERNANDO PATOLSKY TAL SCHWARTZ School of Physics Raymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University Center for Light-Matter Interaction Tel Aviv University School of Chemistry Raymond and Beverly Sackler Faculty of Exact SciencesTel Aviv University

We show that Fourier-plane imaging in conjunction with the Kretschmann–Raether configuration can be used for measuring polariton dispersion with spatial discrimination of the sample, over the whole visible spectral *** demonstrate the functionality of our design on several architectures, including plasmonic waveguides, and show that our new design enables the measurement of plasmonic dispersion curves of spatially inhomogeneous structures with features as small as 3 μm, in a single shot.

关键词： Surface plasmons Microscopy Waveguides Dispersion Spectroscopy surface Thin films optical properties

A multi-mode multi-skill project scheduling reformulation for reconnaissance mission planning

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Science China(Information sciences) 2022年第6期65卷 267-268页

作者： Junqi CAI Zhihong PENG Sijian LIAO Shuxin DING School of Automation Beijing Institute of Technology Signal and Communication Research Institute China Academy of Railway Sciences Corporation Limited

Dear editor,Planning multi-agents scheduling to conduct reconnaissance missions is the core of reconnaissance decision support system. A reconnaissance mission comprises several tasks and a network representing precedence relationships between them, where each task represents an area in which the agents perform information gathering.

关键词： reconnaissance RCPSP multi-mode multi-skill scheduling multi agent system