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SAF等可持续发展措施将为MRO带来新挑战

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航空维修与工程 2024年第4期 16-19页

作者： tom Pleasant 赵平(译) 不详

在2022年ICAO提出“国际航空长期全球理想目标”的背景下,各国政府及航空企业都公开承诺实现碳排放要求,其中可持续航空燃料(SAF)或氢能源等更是被视为减少碳排放的捷径,同时也希望位于行业下游的MRO供应商也能做出类似的承诺。对此,MR... 详细信息

在2022年ICAO提出“国际航空长期全球理想目标”的背景下,各国政府及航空企业都公开承诺实现碳排放要求,其中可持续航空燃料(SAF)或氢能源等更是被视为减少碳排放的捷径,同时也希望位于行业下游的MRO供应商也能做出类似的承诺。对此,MRO行业企业对此看法不一。但目前来看,SAF的广泛使用是能够实现航空可持续的,但同时也将为MRO企业带来很多挑战,包括设施、投资、人员培训等。

关键词：国际航空航空燃料氢能源 MRO 碳排放供应商 SAF 人员培训

以图像漫步重组质性研究过程:从教育场景中的观察者到参与者

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北京大学教育评论 2024年第2期22卷 149-171,191,192页

作者：林小英黄安妮北京大学教育经济研究所/教育学院北京100871

教育研究现场与社会调查实地相比,更需要研究者的共情性理解,图像漫步方法作为质性研究中的一种情境方法论,具有构建共情的教育研究现场的潜能。研究者通过直接参与研究对象的图像创作分享其想象的世界,成为研究对象分享记忆和体验的参... 详细信息

教育研究现场与社会调查实地相比,更需要研究者的共情性理解,图像漫步方法作为质性研究中的一种情境方法论,具有构建共情的教育研究现场的潜能。研究者通过直接参与研究对象的图像创作分享其想象的世界,成为研究对象分享记忆和体验的参与者。场景因信息流动而重新被理解,基于此达成互动的个体轨迹是开放和变化的。柏格森提出的“绵延”概念与图像漫步视角有着内在的共通性,从“绵延”出发理解研究者在一项研究中作出的各种选择所构成的“局部视角”以及由研究者的“介入”所带来的现实的潜在分化,可以重组质性研究的过程,即教育研究的对象不完全是客观存在,需要研究者具备共情能力和必要时的扰动能力;通过共创图像可能比文本更接近“真实”,图像的情动能力有助于研究者了解和转译缄默知识。作为质性研究方法的图像漫步,有着捕捉个体差异性并通过集体对话将个体之间的点进行连线以构成网状图、从而实现从个体生成到群体生成的双重功能。研究者以全然接纳参与者的方式重组研究过程,通过与他人的眼睛一起看世界的共情方式,可以超越自我的边界、生成新的教育主题,创造更广阔视野的理念世界。

关键词：图像漫步质性研究教育场景绵延参与

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“漫”读习语

英语角 2024年第20期 46-47页

作者： tom 欣巴达(画) 不详

小朋友们,你们知道吗?英语当中有很多习语,它们真正的含义可能和字面意思不同哦。读一读下面这个小故Cartoons事,一起来学习一下"take pot luck"的意思吧。

关键词：习语字面意思 take

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“漫”读习语

英语角 2024年第11期 36-37页

作者： tom 欣巴达(画稿) 不详

小朋友们,你们知道吗?英语当中有很多习语,它们真正的含义可能和字面意思不同哦。读一读下面这个小故事,-起来学习一下“cat's out the bag”的意思吧。

关键词：习语字面意思英语含义

Predicting major adverse cardiovascular events after orthotopic liver transplantation using a supervised machine learning model:A cohort study

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World Journal of Hepatology 2024年第2期16卷 193-210页

作者： Jonathan Soldera Leandro Luis Corso Matheus Machado Rech Vinícius Remus Ballotin Lucas Goldmann Bigarella Fernanda tomé Nathalia Moraes Rafael Sartori Balbinot Santiago Rodriguez Ajacio Bandeira de Mello Brandão Bruno Hochhegger Post Graduate Program at Acute Medicine and Gastroenterology University of South WalesCardiff CF371DLUnited Kingdom Postgraduate Program in Pathology Federal University of Health Sciences of Porto Alegre(UFCSPA)Porto Alegre 90050-170Brazil Department of Engineering Universidade de Caxias do SulCaxias do Sul 95070-560Brazil School of Medicine Universidade de Caxias do SulCaxias do Sul 95070-560Brazil Postgraduate Program in Hepatology Federal University of Health Sciences of Porto Alegre(UFCSPA)Porto Alegre 90050-170Brazil

BACKGROUND Liver transplant(LT)patients have become older and *** rate of post-LT major adverse cardiovascular events(MACE)has increased,and this in turn raises 30-d post-LT *** cardiac stress testing loses accuracy when applied to pre-LT cirrhotic *** To assess the feasibility and accuracy of a machine learning model used to predict post-LT MACE in a regional *** This retrospective cohort study involved 575 LT patients from a Southern Brazilian academic *** developed a predictive model for post-LT MACE(defined as a composite outcome of stroke,new-onset heart failure,severe arrhythmia,and myocardial infarction)using the extreme gradient boosting(XGBoost)machine learning *** addressed missing data(below 20%)for relevant variables using the k-nearest neighbor imputation method,calculating the mean from the ten nearest neighbors for each *** modeling dataset included 83 features,encompassing patient and laboratory data,cirrhosis complications,and pre-LT cardiac *** performance was assessed using the area under the receiver operating characteristic curve(AUROC).We also employed Shapley additive explanations(SHAP)to interpret feature *** dataset was split into training(75%)and testing(25%)*** was evaluated using the Brier *** followed Transparent Reporting of a Multivariable Prediction Model for Individual Prognosis or Diagnosis guidelines for ***-learn and SHAP in Python 3 were used for all *** supplementary material includes code for model development and a user-friendly online MACE prediction *** Of the 537 included patients,23(4.46%)developed in-hospital MACE,with a mean age at transplantation of 52.9 *** majority,66.1%,were *** XGBoost model achieved an impressive AUROC of 0.89 during the training *** model exhibited accuracy,precision,recall,and F1-score values of 0.84,0.85,0.80,and 0.79,***

关键词： Liver transplantation Major adverse cardiac events Machine learning Myocardial perfusion imaging Stress test

高取代度阳离子淀粉基苯丙乳液的合成和应用研究

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中国造纸 2024年第9期 94-102+114页

作者：刘毅王立军付文晖贾定赖亦凡 MARTIN Ekman tom Schauman 浙江科技大学环境与资源学院山西强伟纸业有限公司 Chemigate OY

以苯乙烯（St）、丙烯酸正丁酯（BA）、丙烯酸叔丁酯（tBA）为单体，H2O2-FeSO4为引发体系，高取代度阳离子淀粉（HCS）为乳化剂，开展了苯丙表面施胶剂的无皂乳液聚合。探讨了HCS的用量、分子量（以特性黏度表示）、取代度对乳液聚合... 详细信息

以苯乙烯（St）、丙烯酸正丁酯（BA）、丙烯酸叔丁酯（tBA）为单体，H2O2-FeSO4为引发体系，高取代度阳离子淀粉（HCS）为乳化剂，开展了苯丙表面施胶剂的无皂乳液聚合。探讨了HCS的用量、分子量（以特性黏度表示）、取代度对乳液聚合的影响，使用多种方法评价了乳液的理化性能与应用性能。所制备得的高取代度阳离子淀粉基苯丙乳液胶粒平均粒径小（126.2 nm）、正电性强（Zeta电位为25.8 mV）、贮存稳定性优良；将其应用在瓦楞原纸上，施胶纸张的Cobb值为21.6 g/m2，水滴接触角达121.6°，与低取代度阳离子淀粉基苯丙乳液相比，其应用效果具有明显优势。研究对其能赋予纸张更佳施胶效果的原因也提出了机理性的解释。

关键词：阳离子表面施胶剂苯丙乳液无皂聚合高取代度阳离子淀粉

Diatom and Diatomite: Different Focus on Natural Media to Material Science Path

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American Journal of Analytical Chemistry 2024年第1期15卷 1-29页

作者： Secou Sall Vasiliki Papaefthimiou Thierry Dintzer Fabrice Vigneron Eric Brendlé Pierre Petit tom Ferte Saliha Haddoum Sana Labidi Corinne Petit ICPEES UMR-CNRS 7515 Strasbourg University Strasbourg France Adscientis Wittelsheim France ICS CNRS UPR 22 Strasbourg France IPCMS UMR CNRS 7504 Strasbourg University Strasbourg France Ecole Nationale Polytechnique El-Harrach Algeria

Bio-silica issued from diatom, a microalgae, is attracted increasing attention in material science thanks to its peculiar nanoarchitecture and related properties with versatile applications. The present work is a deep analysis on morphological and chemical properties of bio-silica issued from fossil origin (diatomaceous earth) and living one (algal paste). An optimization in purification protocol was performed to obtain multiparous bio-silica from its raw media with keeping its original shape entirely. Multiple characterization methods as scanning electronic microscopy (SEM), infrared spectroscopy, x-ray diffraction (DRX), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX), nitrogen adsorption and inverse gas chromatography (IGC), were used to check the purification protocol efficiency as well as to gather accurate information on morphology and chemical composition of diatom material obtained in large amount.

关键词： Diatom Diatomite Bio-Silica Purification Frustule

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重塑中小学校的体验——以峪景高中为例

当代建筑 2024年第1期 112-118页

作者：蔡羽 tom Reich(摄影) Bill Timmerman(摄影) DLR Group 不详

1创新的设计理念与空间规划亚利桑那州凤凰城的峪景高中位于美国西南部平坦开阔的沙漠地带。项目启动之初,当地企业、政府官员、家长、学生等近480人参与为建设学校而开展的社区会议和设计工坊的工作中。他们连续三周对校园内每个功能... 详细信息

1创新的设计理念与空间规划亚利桑那州凤凰城的峪景高中位于美国西南部平坦开阔的沙漠地带。项目启动之初,当地企业、政府官员、家长、学生等近480人参与为建设学校而开展的社区会议和设计工坊的工作中。他们连续三周对校园内每个功能板块的配置和设计提出自己的想法。设计工坊让设计团队测试想法、微调功能,并迭代设计理念。

关键词：灵活性可适应性可持续设计

Assessing the Efficacy of Wheat-Soybean Based Intercropping System at Different Plant Densities in Bambili, Cameroon

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American Journal of Plant Sciences 2024年第4期15卷 235-251页

作者： Lendzemo E. Tatah Jeazet K. Teitiogo Oben tom Tabi Tange D. Achiri Njualem D. Khumbah Chi Christopher Tamu Department of Crop Production Technology College of Technology University of Bamenda Bambili Cameroon Department of Agronomic and Applied Molecular Sciences Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon School of Tropical Agriculture and Natural Resource Catholic University of Cameroon Bamenda Cameroon Department of Agricultural and Environmental Engineering College of Technology University of Bamenda Bambili Cameroon

Wheat is one of the most important cereals in the world, serving as a staple for millions globally. In the wake of the geopolitical crisis between Russia and Ukraine, it has become incumbent for many countries to invest in wheat production. Improving cropping systems for wheat production is paramount. Intercropping cereals with legumes has tremendous advantages. Therefore, this study was designed to optimize wheat production by intercropping it with soybean at different densities. Between March and August 2023, a randomized complete block design trial was conducted in Bambili, North West of Cameroon with treatments T1 (wheat monocrop at 200,000 plants ha−1), T2 (soybean monocrop at 250,000 plants ha−1), T3 (200,000 wheat and 125,000 soybean ha−1), T4 (100,000 wheat and 250,000 soybean ha−1), T5 (200,000 wheat and 250,000 soybean ha−1) and T6 (100,000 wheat and 125,000 soybean ha−1). Results revealed that growth parameters of wheat were not significantly influenced by monocrop or intercrop. The yield of wheat was significantly higher in the monocrop than the intercrop treatments, with slight variation amongst the intercrop treatments. Soybean yield was higher in the monocrop than in the intercrop, with no variations amongst the intercrop treatments. Only the land equivalence ratio (LER) for T5 was greater than 1.0. The competitive ratio for T5 was 0.54 for wheat and 1.90 for soybean, comparatively lower than the other monocrop treatments. Intercropping wheat and soybean at 200,000:250,000 ratio is recommended.

关键词： Competitive Ration Land Equivalence Ration Intercrop Soybean Wheat