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A two-density approach to the general many-body problem and a proof of principle for small atoms and molecules

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Frontiers of physics 2019年第2期14卷 89-96页

作者： thomas pope Werner Hofer School of Natural and Environmental Sciences Newcastle UniversityNewcastle NE1 7RUUnited Kingdom Institute of Physics & University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China

An extended electron model fully recovers many of the experimental results of quantum mechanics while it avoids many of the pitfalls and remains generally free of paradoxes. The formulation of the manybody electronic problem here resembles the Kohn Sham formulation of standard density functional theory. However, rather than referring electronic properties to a large set of single electron orbitals, the extended electron model uses only mass density and field components, leading to a substantial increase in computational efficiency. To date, the Hohenberg-Kohn theorems have not been proved for a model of this type, nor has a universal energy functional been presented. In this paper, we address these problems and show that the Hohenberg Kohn theorems do also hold for a density model of this type. We then present a proof^of^concept practical implementation of this method and show that it reproduces the accuracy of more widely used methods on a test-set of small atomic systems, thus paving the way for the development of fast, efficient and accurate codes on this basis.

关键词： many-body condensed matter Hartree-Fock density functional theory extended electrons

Spin in the extended electron model

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Frontiers of physics 2017年第3期12卷 81-85页

作者： thomas pope Werner Hofer School of Chemistry Newcastle University Newcastle NE1 7RU UK

It has been found that a model of extended electrons is more suited to describe theoretical simula- tions and experimental results obtained via scanning tunnelling microscopes, but while the dynamic properties are easily incorporated, magnetic properties, and in particular electron spin properties pose a problem due to their conceived isotropy in the absence of measurement. The spin of an electron reacts with a magnetic field and thus has the properties of a vector. However, electron spin is also isotropic, suggesting that it does not have the properties of a vector. This central conflict in the de- scription of an electron＇s spin, we believe, is the root of many of the paradoxical properties measured and postulated for quantum spin particles. Exploiting a model in which the electron spin is described consistently in real three-dimensional space - an extended electron model - we demonstrate that spin may be described by a vector and still maintain its isotropy. In this framework, we re-evaluate the Stern-Gerlach experiments, the Einstein-Podolsky-Rosen experiments, and the effect of consecutive ts and find in all cases a fairly intuitive explanation.

关键词： spin extended electron model geometric algebra Stern-Gerlach experiment Einstein-Podolsky-Rosen magnetism

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美国快速凝固材料的发展和应用概况

宇航材料工艺 1991年第3期21卷 14-16页

作者： thomas Atraham Gregory T.pope 刘先曙

本文简要介绍了美国快速凝固材料的发展和应用情况。

关键词：快速凝固材料应用发展

Mechanical circulatory support in lung transplantation: Cardiopulmonary bypass, extracorporeal life support, and ex-vivo lung perfusion

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World Journal of Respirology 2015年第2期5卷 78-92页

作者： Shaylyn C Bennett Eliza W Beal Curtis A Dumond thomas Preston Jim Ralston Amy pope-Harman Sylvester Black Don Hayes Jr Bryan A Whitson Department of Surgery the Ohio State University Wexner Medical Center Division of Cardiothoracic Surgery Department of Surgerythe Ohio State University Wexner Medical Center Department of Cardiovascular Perfusion and ECMO Nationwide Children’s Hospital Department of Perfusion the Ohio State University Wexner Medical Center Division of Pulmonary AllergyCritical Care and Sleep Medicinethe Ohio State University Wexner Medical Center Division of Transplantation Surgery Department of Surgerythe Ohio State University Wexner Medical Center Department of Pediatric Pulmonology Nationwide Children’s Hospital

Lung transplant is the standard of care for patients with end-stage lung disease refractory to medical management. There is currently a critical organ shortage for lung transplantation with only 17% of offered organs being transplanted. Of those patients receiving a lung transplant, up to 25% will develop primary graft dysfunction, which is associated with an 8-fold increase in 30-d mortality. There are numerous mechanical lung assistance modalities that may be employed to help combat these challenges. We will discuss the use of mechanical lung assistance during lung transplantation, as a bridge to transplant, as a treatment for primary graft dysfunction, and finally as a means to remodel and evaluate organs deemed unsuitable for transplant, thus increasing the donor pool, improving survival to transplant, and improving overall patient survival.

关键词： Lung transplant Cardiopulmonary bypass Extracorporeal membrane oxygenation Extracorporeal life support Extracorporeal lung assist Interventional lung assist Ex-vivo lung perfusion

从西式基督教到中式基督教风格——在中国推进本土文化适应中的建筑手段,1919-1939

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建筑史 2016年第2期 190-200页

作者：高曼士崔金泽(译) 比利时鲁汶大学工程学院建筑学部雷蒙·勒迈尔国际保护中心不详

在1900年以后的中国,教堂的重建采用了许多种不同的西式风格。其中,哥特式在法国和比利时的传教士当中最为流行。如传教士建造师和羹柏(De Moerloose)设计的教堂,都从属于基督教普世文明中的一种保守的世界观。1919年,教皇本笃十五世(Be... 详细信息

在1900年以后的中国,教堂的重建采用了许多种不同的西式风格。其中,哥特式在法国和比利时的传教士当中最为流行。如传教士建造师和羹柏(De Moerloose)设计的教堂,都从属于基督教普世文明中的一种保守的世界观。1919年,教皇本笃十五世(Benedict XV)发布了一项旨在发展本土教会和牧师的新传教政策。此后,主教刚恒毅(Celso Costantini)在中国推行的本土化进程产生了一系列充满雄心的建筑方案。1927年,修道士艺术家葛利斯(Adelbert Gresnigt)奉命创造了一种新的'中式基督教风格',对建筑的本土文化适应与现代化两方面的要求同时做出回答。北京辅仁大学校舍(1929—1931)即是他的杰作:它有着古典的平面布置、功能主义的混凝土结构和中国风格的表皮。这种'中式基督教风格'被进步的传教士和许多中国基督徒所支持,但却激起了保守派传教士和一些中国天主教徒的反对,这些人并不希望看到状如寺庙和佛塔的教堂。

关键词：东西方文化交流教堂本土文化适应风格建造