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一种加权的simpler GMRES算法

厦门大学学报（自然科学版） 2008年第4期47卷 484-488页

作者：杨圣炜卢琳璋厦门大学数学科学学院福建厦门361005

GMRES方法是求解大规模非对称稀疏线性方程组最常用的方法,实际应用中存在着许多对标准GMRES进行改进的算法,比如simpler GMRES和Weighted GMRES.simpler GMRES通过改进GMRES中基的生成过程来减小计算量,同时保持较好的收敛性,Weighted ... 详细信息

GMRES方法是求解大规模非对称稀疏线性方程组最常用的方法,实际应用中存在着许多对标准GMRES进行改进的算法,比如simpler GMRES和Weighted GMRES.simpler GMRES通过改进GMRES中基的生成过程来减小计算量,同时保持较好的收敛性,Weighted GMRES是采用加权技术来加快GMRES方法的收敛速度,但是增加了计算量.本文提出了一种新称为Weighted simpler GMRES的方法,它以simpler GMRES方法为基础,结合Weighted GMRES方法得到.实验表明,对某些问题,Weighted simpler GMRES方法的收敛性优于simpler GMRES和GMRES,计算量小于Weighted GMRES.

关键词： GMRES simpler GMRES Weighted GMRES

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反式钙钛矿光伏中的表面功能化

Science Bulletin 2022年第18期67卷 1817-1819页

作者：楚亮臧月严文生 Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

The highest power conversion effciencies(PCEs)of perovskite solar cells(PSCs)are frequently achieved in regular(n-i-p)structures,such as the certifed 25.7%(https://www.***.gov/pv/celleffciency.html).Although the inverted(p-i-n)PSCs have excelled in negative hysteresis,higher stability,and simpler fabrication method,they are suffering from less effciency than that of regular devices.Additionally.

关键词：钙钛矿表面功能化 simpler

Assessment of POC CD4 Detecting Mode in District or County Labs-Jiangsu Province, China, 2021

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China CDC weekly 2022年第47期4卷 1059-1065,I0003页

作者： Zhi Zhang Xiaoqin Xu Chengqing Sun Jing Lu Haiyang Hu Ying Zhou Gengfeng Fu Department of HIV/STD Control and Prevention Jiangsu Provincial Center for Disease Control and PreventionNanjing CityJiangsu ProvinceChina School of Public Health Nanjing Medical UniversityNanjing CityJiangsu ProvinceChina.

Objective:This study seeks to explore efficient and multiple-item detection modes in new-style HIV labs,as well as access the accuracy and reliability of CD4 cell count detected by point of care(POC)to analyze POC work feasibility in district or county labs.Methods:POC devices adopted in grassroots-level labs and flow cytometers adopted in prefecture-level labs were used to analyze the same group of blood samples.The individual results were collected and compared for parametric tests in correlation and consistency.Results:The Pearson correlation coefficients(r)between results detected by FACSPresto and those by FACSCalibur,FACSVia,FACSCantoII,and EPICSXL were 0.922,0.938,0.914,and 0.823,respectively;the average deviations were−25.64,24.68,3.05,and 70.97 cells/μL,respectively;the Pearson correlation coefficient(r)between results by Pima and FACSCalibur,FACSVia,FACSCantoII,and EPICSXL were 0.900,0.950,0.954,and 0.876,respectively;and the average deviations were−73.99,−40.78,−29.32,and−22.75 cells/μL,respectively.Discussion:Strong positive correlations and good consistency were observed between the CD4 count tested by POC and flow cytometers.These findings provide theoretical support for new-style HIV labs and one-stop services,which can provide shorter testing duration and simpler testing processes,so that the most comprehensive testing results can be obtained in the shortest amount of time.

关键词： testing simpler shortest

Water:The lifeblood of the Earth-human system revealed in elemental correlations

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中国科学:地球科学英文版 2023年第10期66卷 2386-2390页

作者： Zimeng WANG Yongsheng LIU Anhuai LU Yanxin WANG Department of Environmental Science and Engineering Fudan UniversityShanghai200433China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China Beijing Key Laboratory of Mineral Environmental Function School of Earth and Space SciencesPeking UniversityBeijing100871China MOE Key Laboratory of Groundwater Quality and Health State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic PollutionSchool of Environmental StudiesChina University of GeosciencesWuhan430074China

1.Elements and human history The rich chemistry of Earth's elements played an inherent and multifaceted role in shaping the course of human history.Generally,the more inert an element is,the simpler it becomes to extr... 详细信息

关键词： Earth minerals simpler

Guest Editorial: Special issue on machine learning and deep learning algorithms for complex networks

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CAAI Transactions on Intelligence Technology 2023年第1期8卷 1-2页

作者： Pasquale De Meo Qun Jin Jianguo Yao Michael Sheng Department of Ancient and Modern Civilizations University of MessinaMessinaItaly Department of Human Informatics and Cognitive Sciences Faculty of Human SciencesWaseda UniversityTokyoJapan School of Software Shanghai Jiao Tong UniversityShanghaiChina School of Computing Macquarie UniversitySydneyAustralia

In the latest years,researchers from the industry and academia extensively applied machine learning algorithms in a broad range of domains.The goal of this special issue is to illustrate the most recent applications of deep learning methods in a range of real-life domains and to show the practical utility of these techniques.A particular attention goes towards methods to process network data that is capable of modelling complex artificial and natural systems as the interactions of a multitude of simpler entities.

关键词： learning simpler illustrate

Gas Diffusion Layers:Experimental and Modeling Approach for Morphological and Transport Properties

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Accounts of Materials Research 2022年第4期3卷 416-425页

作者： Pongsarun Satjaritanun Sirivatch Shimpalee Iryna V.Zenyuk Department of Chemical and Biomolecular Engineering and National Fuel Cell Research Center University of California IrvineIrvineCalifornia 92697United States Department of Chemical Engineering University of South CarolinaColumbiaSouth Carolina 29208United States

CONSPECTUS:Electrochemical technologies are key to decarbonizing the energy sector.Electrification of the energy sector is underway with battery technologies dominating the lightduty electric vehicles market.It is more challenging to decarbonize historically difficult to decarbonize sectors,such as heavy-duty transportation,planes,ships,and the chemical manufacturing industry(ammonia,cement,steel).Green hydrogen produced via electrolysis will be used as a fuel and a feedstock in some of these processes.At the heart of the hydrogen economy are polymer electrolyte fuel cells(PEFCs),devices that convert hydrogen into electricity.Gas diffusion layers(GDLs)have an integral role in PEFCs,as they are porous carbon layers that transport reactants and products and also remove heat and conduct electricity.To improve the PEFCs’performance and reduce degradation of materials,an understanding of coupled morphological properties and transport phenomena in the GDLs is needed.In this Account,we emphasize the integration of experimental and modeling approaches to achieve complete understanding of materials and transport properties of the GDLs.Our approach builds in complexity from simpler ex situ experiments to in situ and last to 3-D integrated modeling predictions.GDL morphology is complex,as its fabrication includes several stochastic steps(immersion of GDL in various baths to achieve the desired surface wettability)and only 3-D techniques,such as X-ray computed tomography can capture morphology correctly.Porosity,pore-size distribution,tortuosity,and formation factor are the most important morphological properties of the GDLs.For PEFC applications,water is generated in the catalyst layers and is transported through the GDLs.Therefore,GDL wettability directly impacts water permeability through the GDLs.Using in situ water injection experiments,we directly observe which pores water fill at what liquid pressure.This result provides information about the GDL’s affinity to intake water.GDLs are typically of mixed wettabilities,and

关键词： Diffusion battery simpler

Hybrid Organic-metal Oxide Transistors with High Operational Stability

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材料导报 2020年第8期34卷 1-2页

作者： LI Lin Shaanxi Institute of Flexible Electronics(SIFE)&Xi’an Key Laboratory of Biomedical Materials&Engineering Northwestern Polytechnical University(NPU)Xi’an 710072China

Fig.1(a)Schematic of hybrid organic-metal oxide multilayer channel transistors architecture;(b)cross-sectional high-resolution scanning transmission electron microscopy image for hybrid organic-metal oxide TFTs;(c)corresponding band structures Thin-film transistors(TFTs)made from metal oxides,which have useful properties,including high charge carrier mobility and optical transparency,have been widely used in recent years,particularly in organic light-emitting diode displays[1-3].Currently,most metal oxide TFTs are manufactured by physical vapor deposition techniques,but solution-based processing methods could be promising for simpler and more cost-effective strategy[4-5].So far,solution-processed metal oxide TFTs still face significant challenges in carrier mobility and operational stability[6-7].

关键词： transparency simpler sectional

Ethnic Resources Boost Rural Revitalization

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China Today 2024年第4期73卷 39-41页

作者： LU JIAJUN 不详

Since establishing a business in her rural hometown in 2017,Shi Jia,an ethnic Miao entrepreneur,has been committed to exploring ethnic resources to develop local industries.“Compared with other embroidery styles,the Miao embroidery focuses on vivid expression.At the beginning,it was used to record big events in place of writing,and distinguish tribes by different totems.Its color is brighter,and the design is simpler.There are also many auspicious patterns to pray for good luck,”Shi Jia,a deputy to the National People’s Congress(NPC)and president of a Miao clothing company,told China Today.

关键词： Rural establishing simpler

Single-photon avalanche diode imagers in biophotonics:review and outlook

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Light(Science & Applications) 2019年第1期8卷 409-436页

作者： Claudio Bruschini Harald Homulle Ivan Michel Antolovic Samuel Burri Edoardo Charbon AQUA EPFLNeuchatelSwitzerland AQUA TU DelftDelftThe Netherlands

Single-photon avalanche diode(SPAD)arrays are solid-state detectors that offer imaging capabilities at the level of individual photons,with unparalleled photon counting and time-resolved performance.This fascinating technology has progressed at a very fast pace in the past 15 years,since its inception in standard CMOS technology in 2003.A host of architectures have been investigated,ranging from simpler implementations,based solely on off-chip data processing,to progressively“smarter”sensors including on-chip,or even pixel level,time-stamping and processing capabilities.As the technology has matured,a range of biophotonics applications have been explored,including(endoscopic)FLIM,(multibeam multiphoton)FLIM-FRET,SPIM-FCS,super-resolution microscopy,time-resolved Raman spectroscopy,NIROT and PET.We will review some representative sensors and their corresponding applications,including the most relevant challenges faced by chip designers and end-users.Finally,we will provide an outlook on the future of this fascinating technology.

关键词： image photon simpler