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False Color Method for Retinal Oximetry

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Journal of Biomedical Science and Engineering 2019年第12期12卷 533-544页

作者： Erwin Michel Davila-Iniesta santiago Guerrero-Gonzalez Jorge santiago-Amaya Paola Castillo-Juarez luis Nino-de-Rivera-Oyarzabal SEPI ESIME Culhuacan Instituto Politecnico NacionalMexico CityMexico ENCB Santo Tomas Instituto Politecnico NacionalMexico CityMexico

Oximetry is a method for measuring the oxygen saturation of haemoglobin in blood. Particularly, retinal oximetry based in the measurement of oxygen saturation in retinal vessels has acquired great interest to gather information on blood oxygenation from said vessels within inner and outer retina. Non-invasive spectrophotometric retinal oximetry has been studied for over five decades based on imaging spectroscopy. However, Optical Coherence Tomography (OCT) is an alternative to analyze the absorption difference between oxyhaemoglobin (HbO2) and deoxyhaemoglobin (Hb) in the retinal vessels and the choroidal structure. We propose in this paper an alternative process to manipulate conventional OCT images to evaluate changes in the relative haemoglobin oxygen saturation. Conventional OCT images from 570 nm and 600 nm in gray scale are converted to a corresponding color scale to be compared to the oxygenation information involved in the original gray scale OCT images.

关键词： Choroidal Structure False Color Method Filters Fundus OCT Image Oxygen Saturation Oximetry Retinal Vessels

A graph-based representation of knowledge for managing land administration data from distributed agencies–A case study of Colombia

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Geo-Spatial Information Science 2022年第2期25卷 259-277页

作者： luis M.Vilches-Blázquez Jhonny Saavedra Investigación en Computación Instituto Politécnico NacionalMexico CityMexico School of Land Surveying Geodesy and Mapping EngineeringUniversidad Politécnica de MadridMadridSpain

Multiple efforts have been performed worldwide around diverse aspects of land ***,land administration data and systems’notorious heterogeneity remains a longstanding challenge to develop a harmonized *** this sense,the traditional Spatial Data Infrastructures adoption is not enough to overcome this challenge since data sources’heterogeneity implies needs related to harmonization interoperability,sharing,and integration in land administration *** paper proposes a graph-based represen-tation of knowledge for integrating multiple and heterogeneous data sources(tables,shape-files,geodatabases,and WFS services)belonging to two Colombian agencies within a decentralized land administration *** knowledge graphs are developed on an ontology-based knowledge representation using national and international standards for land *** approach aims to prevent data isolation,enable cross-datasets integration,accomplish machine-processable data,and facilitate the reuse and exploitation of multi-jurisdictional datasets in a single approach.A real case study demonstrates the applicability of the land administration data cycle deployed.

关键词： Land administration knowledge graph ontology heterogeneity data integration

Online Demand Response Characterization Based on Variability in Customer Behavior

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 936-946页

作者： Lester Marrero Daniel Sbárbaro luis García-Santander the Department of Electrical Engineering University of ConcepciónConcepción 4070409Chile

This paper proposes an online framework to characterize demand response(DR)over *** proposed framework facilitates obtaining and updating the daily consumption patterns of *** essential concept of response profile class(RPC)is introduced for characterization and complemented by the measure of the variability in customer *** paper uses a modified version of the incremental clustering by fast search and find of density peaks(CFSFDP)algorithm for daily profiles,considering the multivariate normal kernel density estimator and incremental forms of the Davies-Bouldin(i DB)and Xie-Beni(i XB)validity *** studies conducted using real-world and simulated daily profiles of residential and commercial Chilean end-users have demonstrated how the proposed framework can continuously characterize *** proposed framework is proven to achieve realistic customer models for effective energy management by estimating the customer response to price signals at the distribution system operator(DSO)level.

关键词： Demand response(DR) incremental indice online characterization online clustering response profile class(RPC)

Theranostic of orthotopic gliomas by core-shell structured nanoplatforms

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Light(Science & Applications) 2022年第6期11卷 1034-1035页

作者： luis D.Carlos Phantom-G CICECO-Aveiro Institute of MaterialsPhysics DepartmentUniversity of Aveiro3810-193 AveiroPortugal

Smart designed core-shell nanostructures formed by a YVO_(4)∶Nd^(3+) nanoparticle as the core,the sonosensitizer hematoporphyrinmonomethyl ether as the carrier,and MnO_(2) nanosheets as the shell demonstrate bimodal ... 详细信息

关键词： modal glioma orthotopic

Structural performance assessment of GFRP elastic gridshells by machine learning interpretability methods

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Frontiers of Structural and Civil Engineering 2022年第10期16卷 1249-1266页

作者： Soheila KOOKALANI Bin CHENG Jose luis Chavez TORRES Department of Civil Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Civil Engineering Technical University of LojaLoja 110102Ecuador

The prediction of structural performance plays a significant role in damage assessment of glass fiber reinforcement polymer(GFRP)elastic gridshell *** learning(ML)approaches are implemented in this study,to predict maximum stress and displacement of GFRP elastic gridshell *** ML algorithms,including linear regression(LR),ridge regression(RR),support vector regression(SVR),K-nearest neighbors(KNN),decision tree(DT),random forest(RF),adaptive boosting(AdaBoost),extreme gradient boosting(XGBoost),category boosting(CatBoost),and light gradient boosting machine(LightGBM),are implemented in this *** features of structural performance considered in this study are the maximum stress as f1(x)and the maximum displacement to self-weight ratio as f2(x).A comparative study is conducted and the Catboost model presents the highest prediction ***,interpretable ML approaches,including shapely additive explanations(SHAP),partial dependence plot(PDP),and accumulated local effects(ALE),are applied to explain the *** is employed to describe the importance of each variable to structural performance both locally and *** results of sensitivity analysis(SA),feature importance of the CatBoost model and SHAP approach indicate the same parameters as the most significant variables for f1(x)and f2(x).

关键词： machine learning gridshell structure regression sensitivity analysis interpretability methods

Thrombolysis in elderly patients

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Journal of Geriatric Cardiology 2007年第4期4卷 250-253页

作者： santiago Herrero Jose Antonio Lapuerta-Irigoyen Pacemaker and Coronary Unit Intensive Care ServiceCabuees HospitalGijon Spain Pacemaker and Coronary Unit Intensive Care ServiceCabuees HospitalGijonSpain

The elderly population consists of those over age 75 years and appears to represent the fastest-growing segment of the population. Intravenous thrombolytic therapy (TT) is the most common strategy for the treatment of acute myocardial infarction (AMI) in many parts of the world. However, TT carries a higher risk of intra-cranial hemorrhage (ICH) in the elderly patients. Primary percutaneous transluminal coronary angioplasty and stenting (PCI) represents an important alternative in these elderly individuals with contraindications to TT. In developing countries, or in areas without availability of primary PCI, TT remains the only therapeutic modality. Dedicated randomized trials are needed to provide a comprehensive understanding of AMI management in the elderly group.(J Geriatr Cardiol 2007;4:250-253.)

关键词： acute myocardial infarction thrombolysis elderly

Potential use of magnesium industrial waste for synthesis of Li and Mg co-doped LiMn_(2)O_(4)nanoparticles as cathode material for Li-ion batteries:Effect of sintering temperature

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Nano Research 2022年第5期15卷 4500-4516页

作者： Aleksei Llusco luis Rojas Svetlana Ushak Mario Grageda Department of Chemical Engineering and Mineral Processing and Center for Advanced Study of Lithium and Industrial Minerals(CELiMIN) Universidad de AntofagastaAntofagasta 1270300Chile

Potential advantages of active electrode nanomaterials have led to development of high energy and power density lithium-ion(Li-ion)***,under increasing demand for critical resources such as lithium and cobalt,it is necessary to use abundant raw materials,which can be obtained from industrial *** this work,purified Mg(OH)_(2)from waste generated in the production of Li2CO3 with natural brines from the Salar de Atacama(Chile)is used as a doping agent for synthesis of LiMn_(2)O_(4)(LMO)spinel octahedral nanoparticles co-doped with excess Li and *** of a pure cubic spinel phase(Fd3m)takes place at 500℃and sintering temperature effect at 580 and 750℃,thus the elemental composition and the structural,morphological,and electrochemical properties are studied in *** electrochemical performance at room temperature is obtained for Li_(1.03)Mg_(0.05)Mn_(1.92)O_(4)spinel sintered at 750℃with an initial discharge capacity of 121.3 mAh·g^(-1)and capacity retention of 94.0%after 100 cycles at C/3.A locally ordered spinel structure is obtained at 750℃,and doping with Mg^(2+)improves structural *** between both effects resulted in a high Li^(+)diffusion rate(1.29×10^(-9)cm^(2)·s^(-1))significantly improving cycling performance at elevated C-rates in 50℃.

关键词： LiMn_(2)O_(4)(LMO)spinel Mg doped excess Li octahedral nanoparticle industrial waste lithium-ion(Li-ion)batteries

Additives in metal halide perovskite films and their applications in solar cells

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Journal of Energy Chemistry 2020年第7期29卷 215-228,I0007页

作者： Zonghao Liu luis K.Ono Yabing Qi Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)Okinawa 904-0495Japan

The booming growth of organic-inorganic hybrid lead halide perovskite solar cells have made this promising photovoltaic technology to leap towards *** of the most important issues for the evolution from research to practical application of this technology is to achieve high-throughput manufacturing of large-scale perovskite solar *** particular,realization of scalable fabrication of large-area perovskite films is one of the essential *** the past ten years,a great number of approaches have been developed to deposit high quality perovskite films,to which additives are introduced during the fabrication process of perovskite layers in terms of the perovskite grain growth control,defect reduction,stability enhancement,***,we first review the recent progress on additives during the fabrication of large area perovskite films for large scale perovskite solar cells and *** then focus on a comprehensive and in-depth understanding of the roles of additives for perovskite grain growth control,defects reduction,and stability *** advancement of the scalable fabrication of high-quality perovskite films and solar cells using additives to further develop large area,stable perovskite solar cells are discussed.

关键词： Perovskite solar cell Additive Solar modules Film quality

Highly Efficient Synthesis of Novel Poly-aza Bis-histidines

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Highly Efficient Synthesis of Novel Poly-aza Bis-histidines