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Single-atom catalysts for the electrochemical reduction of carbon dioxide into hydrocarbons and oxygenates

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Carbon Energy 2024年第3期6卷 64-117页

作者： karl Adrian Gandionco Juwon Kim Lieven Bekaert Annick Hubin Jongwoo Lim Department of Chemistry Seoul National UniversitySeoulRepublic of Korea Research Group Electrochemical and Surface Engineering(SURF) Department of Materials and ChemistryVrije Universiteit BrusselBrusselsBelgium

The electrochemical reduction of carbon dioxide offers a sound and economically viable technology for the electrification and decarbonization of the chemical and fuel *** this technology,an electrocatalytic material and renewable energy-generated electricity drive the conversion of carbon dioxide into high-value chemicals and carbon-neutral *** the past few years,single-atom catalysts have been intensively studied as they could provide near-unity atom utilization and unique catalytic ***-atom catalysts have become one of the state-of-the-art catalyst materials for the electrochemical reduction of carbon dioxide into carbon ***,it remains a challenge for single-atom catalysts to facilitate the efficient conversion of carbon dioxide into products beyond carbon *** this review,we summarize and present important findings and critical insights from studies on the electrochemical carbon dioxide reduction reaction into hydrocarbons and oxygenates using single-atom *** is hoped that this review gives a thorough recapitulation and analysis of the science behind the catalysis of carbon dioxide into more reduced products through singleatom catalysts so that it can be a guide for future research and development on catalysts with industry-ready performance for the electrochemical reduction of carbon dioxide into high-value chemicals and carbon-neutral fuels.

关键词： electrocatalysis electrochemical CO_(2)reduction hydrocarbons oxygenates single-atom catalysts

Compliant Mechanism Synthesis by Using Elastic Similitude

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 769-775页

作者： HANKE Uwe HAMPEL Peter COMSA Andrei MODLER Niels MODLER karl-Heinz Institute of Solid Mechanics TU Dresden 01069 Dresden Germany Institute of Lightweight Engineering and Polymer Technology TU Dresden 01307 Dresden Germany

Compliant mechanisms have several advantages, especially smaller number of elements and therefore less movable joints. The flexural members furthermore allow an integration of special functions like balancing or locking. Especially fiber reinforced materials exhibit a wide range of function integration considering their compliance in passive as well active applications. To take advantage of compliant elements in applications a robust synthesis tool is needed. The synthesis based on topology optimization method or the pseudo rigid body approach leads to complex structures. Considering the use of fiber reinforced material a synthesis approach which leads to less complex structures is more suitable. For building up simple structures, with only one cantilever beam as compliant element（B） a graphical approach using the elastic similitude is the most efficient method. A step-by-step synthesis procedure is presented to synthesize compliant mechanisms with rotatory joints（R） and prismatic joints（P） to develop RRB/PRB- and RPB-linkages. Using the elastic similitude to implement these results into a graphical synthesis algorithm is the innovation part of this paper. It can be shown that this approach leads to a comfortable handling of beam elements during the synthesis, where the two free parameters can be directly coupled to scale and fix the orientation of the beam element. This advantage inherently shortens the development process. In giving an example the focus lies of the experimental approach, which also shows that the simple BERNOULLI beam model is valid and so the synthesis by using the elastic similitude. The method is presented and discussed by using an application for a cup holder mechanism made of fiber reinforced material.

关键词： Compliant mechanism synthesis elastic similitude

Recycling of magnesium drive train components

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Science China(Technological Sciences) 2009年第1期52卷 148-154页

作者： Daniel FECHNER Carsten BLAWERT Norbert HORT karl Ulrich KAINER MagIC-Magnesium Innovation Centre GKSS Research Centre Max-Planck-Straβe 1

With the development of new heat resistant magnesium alloys, the automotive industry has introduced several parts to the drive train. The rising number of large magnesium components will result in a higher quantity of automotive post consumer scrap. It was the aim of this work to find a reasonable alloy system for the recycling of these magnesium drive train components. A matrix of potential recy-cling alloys based on the magnesium alloy AM50 was prepared via permanent mould casting. The materials were investigated via tensile testing, creep tests and salt spray tests. Three alloys were selected for processing via high pressure die casting and the tests were repeated on the new materials. A promising system for recycling has been isolated and will be investigated more deeply for the influence of impurities.

关键词： magnesium recycling end-of-life vehicles recycling alloy post consumer scrap

Design of an innovative multi-stage forming process for a complex aeronautical thin-walled part with very small radii

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Chinese Journal of Aeronautics 2018年第11期31卷 2165-2175页

作者： Yao WANG Lihui LANG Ehsan SHERKATGHANAD karl Brian NIELSEN Chun ZHANG School of Mechanical Engineering and Automation Beihang University Department of Materials and Production Aalborg University Tianjin Tianduan Press Co. LTD

In this paper, an aeronautical thin-walled part with a complex geometry which has several sharp bends and curvatures in different directions was investigated. This kind of part is difficult to be manufactured only in one stage. Therefore, an innovative multi-stage active hydroforming process assisted by the rigid forming method was designed. In addition, an optimized blank geometry is obtained. In fact, the main focused point of this paper is to propose a new small radius rounded corner forming technique and analyze the mechanism. Two kinds of forming modes of changing a big rounded corner into a small one, which are related to different tangential positions of the die in the process of calibration, are analyzed theoretically. Meanwhile, the stress and strain states of the deformation region are compared. The relationships between the minimum relative radii of rounded corners I and II in the first stage and the hydraulic pressure are calculated by the bending theory. Finally, the influences of the tensile-bulging effect and the interface condition of the double-layer sheet on the forming quality of the specimen are investigated. The achieved results can make a foundation for utilizing the proposed method in forming of thin-walled parts with very small radii.

关键词： Double-layer sheet Hydroforming Multi-stage forming Small rounded corner Tensile-bulging effect

Integral representation of M-band filters of Daubechies type

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Chinese Science Bulletin 1997年第10期42卷 803-807页

作者： Huang, dr Sun, QY Zhang, ZY Center for Mathematical Sciences Zhejiang University Hangzhou China

FOR natural integers M≥2 and N≥1,M-band filter _N^MH(ξ)of Daubechies type is a trigono-metric polynomial _N^MH(ξ)with real coefficients such

关键词： filter vanishing moment integral representation.

An Automated Brain Image Analysis System for Brain Cancer using Shearlets

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Computer Systems Science & Engineering 2022年第1期40卷 299-312页

作者： R.Muthaiyan dr M.Malleswaran Department of Electronics and Communication Engineering University College of Engineering ThirukkuvalaiTamilnadu610204India Department of Electronics and Communication Engineering University College of Engineering KancheepuramKancheepuram631552India

In this paper,an Automated Brain Image Analysis(ABIA)system that classifies the Magnetic Resonance Imaging(MRI)of human brain is *** classification of MRI images into normal or low grade or high grade plays a vital role for the early *** Non-Subsampled Shearlet Transform(NSST)that captures more visual information than conventional wavelet transforms is employed for feature *** the feature space of NSST is very high,a statistical t-test is applied to select the dominant directional sub-bands at each level of NSST decomposition based on sub-band energies.A combination of features that includes Gray Level Co-occurrence Matrix(GLCM)based features,Histograms of Positive Shearlet Coefficients(HPSC),and Histograms of Negative Shearlet Coefficients(HNSC)are *** combined feature set is utilized in the classification phase where a hybrid approach is designed with three classifiers;k-Nearest Neighbor(kNN),Naive Bayes(NB)and Support Vector Machine(SVM)*** output of individual trained classifiers for a testing input is hybridized to take a final *** quantitative results of ABIA system on Repository of Molecular Brain Neoplasia Data(REMBRANDT)database show the overall improved performance in comparison with a single classifier model with accuracy of 99% for normal/abnormal classification and 98% for low and high risk classification.

关键词： Brain image analysis wavelets Shearlet multi-scale analysis hybrid classification

Performance Analysis of Breast Cancer Detection Method Using ANFIS Classification Approach

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Computer Systems Science & Engineering 2023年第1期44卷 501-517页

作者： K.Nagalakshmi dr.S.Suriya Department of Computer Science and Engineering Sethu Institute of TechnologyVirudhunagar626115Tamil NaduIndia Department of Computer Science and Engineering PSG College of TechnologyCoimbatore641004Tamil NaduIndia

Breast cancer is one of the deadly diseases prevailing in *** detection and diagnosis might prevent the death *** diagnosis of breast cancer remains a significant challenge,and early diagnosis is essential to avoid the most severe manifestations of the *** existing systems have computational complexity and classification accuracy problems over various breast cancer *** order to overcome the above-mentioned issues,this work introduces an efficient classification and segmentation ***,there is a requirement for developing a fully automatic methodology for screening the cancer *** paper develops a fully automated method for breast cancer detection and segmenta-tion utilizing Adaptive Neuro Fuzzy Inference System(ANFIS)classification *** proposed technique comprises preprocessing,feature extraction,classifications,and segmentation ***,the wavelet-based enhancement method has been employed as the preprocessing *** texture and statistical features have been extracted from the enhanced ***,the ANFIS classification algorithm is used to classify the mammogram image into normal,benign,and malignant ***,morphological processing is performed on malignant mam-mogram images to segment cancer *** analysis and comparisons are made with conventional *** experimental result proves that the pro-posed ANFIS algorithm provides better classification performance in terms of higher accuracy than the existing algorithms.

关键词： Breast cancer detection segmentation classification malignant

VANCOCIN~R-VANCOMYCIN-RESISTANTENTEROCOCCI

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中国临床药理学杂志 1997年第4期 35-41页

作者：Ｄｒ．ＡｌａｎＷｅｉｎｓｔｅｉｎ

ＶＡＮＣＯＣＩＮＲ－ＶＡＮＣＯＭＹＣＩＮ－ＲＥＳＩＳＴＡＮＴＥＮＴＥＲＯＣＯＣＣＩＤｒ．ＡｌａｎＷｅｉｎｓｔｅｉｎ（ＥｌｉｌｉｌｙＡｓｉａ，Ｉｎｃ．，ＵＳＡ）ＳＵＭＭＡＲＹＴｈｅｎｕｍｂｅｒｏｆＥｎｔｅｒｏｃｏｃｃｕ...

ＶＡＮＣＯＣＩＮＲ－ＶＡＮＣＯＭＹＣＩＮ－ＲＥＳＩＳＴＡＮＴＥＮＴＥＲＯＣＯＣＣＩＤｒ．ＡｌａｎＷｅｉｎｓｔｅｉｎ（ＥｌｉｌｉｌｙＡｓｉａ，Ｉｎｃ．，ＵＳＡ）ＳＵＭＭＡＲＹＴｈｅｎｕｍｂｅｒｏｆＥｎｔｅｒｏｃｏｃｃｕｓｉｓｏｌａｔｅｓｒｅｓｉｓｔａｎ...

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Laparoscopic step 1 ALPPS with microwave transection of theliver for Klatskin tumors:Is it worthwhile?

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Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 278-279页

作者： marcello donati francesco basile karl j oldhafer department of surgery and medical-surgical specialties general and oncologic surgery unitvittorio-emanuele university hospital of cataniaVia Plebiscito 628Catania 95122Italy semmelweiss university of budapest asklepios campus hamburgHamburg 20099Germany department of general and abdominal surgery asklepios barmbek hospitalHamburg 22307Germany

To the Editor：Associating liver partition and portal vein ligation for stagedhepatectomy （ALPPS） was introduced in 2007 [1]. This techniqueis now used worldwide and has a wide spectrum of ***, scientific debate and un-regulated surgical experimentationconcerning the application of this technique led the surgeons to organize the first Consensus Meeting [2] to build a scientificconsensus. One of the most controversial indications to ALPPS isits application for Klatskin tumors. The aim of this letter is to analyzethe critical aspects of laparoscopic microwave ALPPS for radicalsurgical treatment of Klatskin tumors.

关键词： Laparoscopic step 1 ALPPS with microwave transection of the liver for Klatskin tumors:Is it worthwhile