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Reversible solid-oxide cells for clean and sustainable energy

Clean Energy 2019年第3期3卷 175-201页

作者： M.b.Mogensen M.Chen H.L.Frandsen C.Graves J.b.Hansen K.V.Hansen A.Hauch T.Jacobsen S.H.Jensen T.L.Skafte X.Sun Department of Energy Conversion and Storage Technical University of Denmark(DTU)Frederiksborgvej 399DK-4000 RoskildeDenmark Haldor Topsøe Haldor Topsøes Allé1DK-2800 Lyngby Department of Chemistry Technical University of DenmarkDK-2800 Kgs.LyngbyDenmark DynElectro ApS DK-4621 GadstrupDenmark

This review gives first a brief view of the potential availability of sustainable *** is clear that over 100 times more solar photovoltaic energy than necessary is readily accessible and that practically available wind alone may deliver sufficient energy supply to the *** to the intermittency of these sources,effective and inexpensive energy-conversion and storage technology is *** for the possible electrolysis application of reversible solid-oxide cells(RSOCs),including a comparison of power-to-fuel/fuel-to-power to other energy-conversion and storage technologies is *** electrochemistry and chemistry of H_(2)O,CO_(2),H_(2),CO,CnHm(hydrocarbons)and NH3,including thermodynamics and cell performance,are *** mechanical strength of popular cell supports is outlined,and newly found stronger materials are *** cell-degradation mechanisms,including the effect of common impurities in gases and materials(such as S and Si),plus the deleterious effects of carbon deposition in the fuel electrode are described followed by explanations of how to avoid or ease the *** of how RSOCs powered by sustainable energy may be applied on a large scale for the transportation sector via power-to-fuel technology and for integration with the electrical grid together with seasonal storage are ***,a brief comparison of RSOCs to other electrolysis cells and an outlook with examples of actions necessary to commercialize RSOC applications are sketched.

关键词： electrolysis fuel cells solid-oxide cells power-to-fuel electrochemical syngas

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Polynomial-based Evaluation of the Impact of Aperture Phase Taper on the Gain of Rectangular Horns

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Journal of Electromagnetic Analysis and Applications 2010年第7期2卷 424-430页

作者： Konstantinos b. baltzis 不详

The aperture phase taper due to quadratic phase errors in the principal planes of a rectangular horn imposes signifi-cant constraints on the on-axis far-field gain of the horn. The precise calculation of gain reduction involves Fresnel integrals;therefore, exact results are obtained only from numerical methods. However, in horns’ analysis and design, simple closed-form expressions are often required for the description of horn-gain. This paper provides a set of simple polynomial approximations that adequately describe the gain reduction factors of pyramidal and sectoral horns. The proposed formulas are derived using least-squares polynomial regression analysis and they are valid for a broad range of quadratic phase error values. Numerical results verify the accuracy of the derived expressions. Application examples and comparisons with methods in the literature demonstrate the efficacy of the approach.

关键词： Microwave Antennas Rectangular Horn Gain Quadratic Phase Error Linear Regression

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多孔质静压径向轴承的理论建模与数值计算

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振动与冲击 2021年第20期40卷 16-24页

作者：顾延东成立 b HLE Martin SCHIMPF Artur 袁寿其扬州大学水利科学与工程学院江苏扬州225009 江苏大学国家水泵及系统工程技术研究中心江苏镇江212013 凯泽斯劳滕工业大学流体力学和流体机械研究所德国凯泽斯劳滕67663

为计算多孔质静压径向轴承静特性,基于雷诺润滑方程、多孔质达西方程和连续方程,建立了考虑多孔质-气膜交界面速度滑移的多孔质轴承流动模型。采用有限差分法、变步长差分格式、逐次超松弛法,提出Laplace-Neumann虚拟节点法,建立了流动... 详细信息

为计算多孔质静压径向轴承静特性,基于雷诺润滑方程、多孔质达西方程和连续方程,建立了考虑多孔质-气膜交界面速度滑移的多孔质轴承流动模型。采用有限差分法、变步长差分格式、逐次超松弛法,提出Laplace-Neumann虚拟节点法,建立了流动控制方程组同时迭代的数值方法,编写了快速稳定的求解器PbS(porous bearing solver)。PbS承载能力、压力场、速度场等与ANSYS Fluent相近,但PbS实现了即时仿真。利用PbS分析了供给压差和润滑剂黏度对静特性的影响,结果表明:随着供给压差增大,承载能力和供给流量线性增大,供给功耗平方增大。随着黏度增大,承载能力略微增大,流量和功耗线性减小。随着偏心率增大,承载能力、流量及功耗增大。该自主求解器和结论可为多孔质轴承设计提供参考。

关键词：多孔质静压径向轴承理论建模数值计算即时仿真供给压差润滑剂黏度

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Objective frequency-specific hearing thresholds definition for medicolegal purposes in case of occupational NIHL: ASSR outperforms CERA

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Journal of Otology 2021年第4期16卷 210-219页

作者： P.H.DeJonckere b.Millet R.Van Gool A.Martens J.Lebacq Federal Agency for Occupational Risks BrusselsBelgium Institute of Neurosciences University of LouvainBrusselsBelgium

Audiological use of the 40 Hz-ASSR (auditory steady state responses) could be valuable for objectivelyestimating the frequency-specific threshold in adults undergoing an expertise examination for medicolegal and/or compensation purposes. The present prospective study was set up to clarify the relationship between the thresholds obtained by cortical evoked response audiometry (CERA) and by 40 HzASSR, in the same ears, within a large homogeneous sample of 164 subjects (328 ears) with NIHL andwell documented exposure to noise. All these subjects claimed financial compensation for occupationalNIHL, and there was a suspicion of exaggeration of the reported NIHLs. ASSR thresholds show a goodcorrelation with the CERA thresholds. However, a systematic shift is noticed, ASSR thresholds being onaverage (1e2 e 3 kHz) 4.38 db lower (i.e. showing less hearing loss) than CERA thresholds. Moreover, thebinaural multiple ASSR technique allows a considerable time gain when compared to the CERA.

关键词： Objective audiometry CERA ASSR NIHL Medicolegal

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SYNTHESIS OF PHENYL THIOUREAS CONTAINING PARA-SUbSTITUTED TERTIARY AMINO-GROUPS

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Science China Mathematics 1954年第3期 301-304页

作者： A.b.WANG Chekiang University

The action of benzoyl isothiocyanate on p-tert.-amino-anilines gaves-benzoyl derivatives of p-tert.-aminophenyl thioureas. Upon hydrolysis,p-ter.-aminophenyl thioureas were obtained in excellent over-all yields. Threenew phenyl thioureas: p-diethylamino-, p-(N-piperidyl)-and p-(N-mor-pholinyl)-phenyl thioureas were thus prepared. Most of the intermediatesencountered have not appeared in the literature.

关键词： SYNTHESIS OF PHENYL THIOUREAS CONTAINING PARA-SUbSTITUTED TERTIARY AMINO-GROUPS

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New Design &build biological System through the Use of Microalgae Addressed to Sustainable Development

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Journal of Environmental Protection 2010年第2期1卷 183-200页

作者： Armen b. Avagyan 不详

Current trends in energy consumption and biofuel manufacturing are neither secure nor sustainable, because they are not provided by necessary cost effective technologies. Further reductions of cost and technological development will be needed for biofuels to be able to compete effectively without subsidy. With the debate raging about raw material of biofuel, microalgae may offer a solution to this conundrum;creating enormous reserves of biofuels and boosting feed production. In this goal Center suggest projects, which incorporate water recourse management and restoration of lakes, freshwater conservation and cleanup through cost effective biodiesel manufacturing as well as pharmaceuticals destruction through the use of microalgae Chlorella and wastewaters aimed to replace the burning technology includes also supplying biofuel profitably and developed pilot bussiness plan based on the cost effective technology through applying new innovative approaches in various stages of microalgae production. The benefits of microalgae are so overwhelming that this, combined with the prospect of the improvement in nature protection, makes it imperative for the world to devise an international response and a plan of action. Incentives will be needed for the development of industry-led platforms such as the World Microalgae Technology Platform and its international financial fund. Microalgae must be the key tool for the new design and building sustainable development and environment management.

关键词： Environmental Management Microalgae Algal bloom Lake Restoration biofuel Feed Additive Waste-water

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The False Promise of Kant＇s Humanity Formula

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Journal of Philosophy Study 2012年第11期2卷 794-803页

作者： Andrew b. Johnson Missouri State University

Kant＇s Humanity Formula of the Categorical Imperative is arguably its most widely preferred formulation, having been defended as a moral principle and employed in the evaluation of particular moral problems by a number of leading contemporary ethicists. For them and many other readers of Kant, the idea that we are not to treat persons as mere means to our own ends but are rather to respect their rational agency as intrinsically valuable holds great promise for qualifying as, in Kant＇s words, ＂the supreme principle of morality.＂ In the present paper I argue that the Humanity Formula cannot deliver on this promise. After setting forth three conditions of adequacy for any genuine supreme principle of morality, I argue that the Humanity Formula, on three textually grounded interpretations each of which has been advocated by a prominent Kantian ethicist, does not satisfy these conditions. Whichever of these textually grounded interpretations is taken, the Humanity Formula is open to compelling counterexamples.

关键词： Categorical Imperative Humanity Formula Kant promise

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Numerical Simulation of Nonlinear Surface Gravity Waves Transformation under Shallow-Water Conditions

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Applied Mathematics 2012年第2期3卷 135-141页

作者： Iftikhar b. Abbasov Taganrog Technological Institute Southern Federal University Taganrog Russia

This work considers the problems of numerical simulation of non-linear surface gravity waves transformation under shallow bay conditions. The discrete model is built from non-linear shallow-water equations. Are resulted boundary and initial conditions. The method of splitting into physical processes receives system from three equations. Then we define the approximation order and investigate stability conditions of the discrete model. The sweep method was used to calculate the system of equations. This work presents surface gravity wave profiles for different propagation phases.

关键词： Equations of Shallow-Water Numerical Modelling Nonlinear Surface Gravity Waves Transformation of Surface Wave Profile

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Perigastric extraskeletal Ewing's sarcoma: A case report

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World Journal of Gastroenterology 2009年第2期15卷 245-247页

作者： Radoje b Colovic Nikica M Grubor Marjan T Micev Slavko V Matic Henry Dushan Edward Atkinson Stojan M Latincic Institute for Digestive Diseases Clinical Center of Serbia Koste Todorovica 6 Belgrade 11000 Serbia Imperial College School of Medicine St Mary's Hospital Praed Street London W2 1NY United Kingdom

Ewing's sarcoma (ES) is a neoplasm of undifferentiated small round cells, which occurs in the bones and deep soft tissues of children and adolescents. We present a rare case of a 44-year-old woman with gastric ES presenting with epigastric pain and weight loss. Ultrasound and computed tomography scans indicated a solid/cystic mass in the pancreatic tail. At laparotomy, the tumor was found attached to the posterior surface of the stomach, completely free from the pancreas, with no lymphadenopathy or local metastases. The polynodal, partly pseudocystic, dark-red soft tumor was excised. Histopathology revealed an anaplastic small-round-cell tumor with strong membranous CD99 immunoexpression. Additionally, there was patchy immunostaining for S-100 protein, vimentin, protein gene product (PGP) 9.5 and neuron-specifi c enolase, and weak focal CD117 cytoplasmic immunoreactivity. The patient had no adjuvant chemotherapy; her postoperative recovery was uneventful, and she remains symptom-free, and without any sign of recurrence at 20 mo. To the best of our knowledge, this is only the third ever case of gastric ES.

关键词： Stomach Extraskeletal Ewing's sarcoma

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THE ORIGIN OF THE NIANGTZEKUAN TUFA

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地质学报 1930年第3期 216-221页

作者： GEORGE b. bARbOUR Department of Geology Yenching University

For centuries the tufa of Niangtzekuan has possessed a peculiar fascination. It is to be seen decorating rock-gardens and fish-ponds all over North China, and is sold in curio-markets for use in flower-bowls, and as o... 详细信息

关键词： THE ORIGIN OF THE NIANGTZEKUAN TUFA down

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