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Marble epistyles under shear: an experimental study of the role of “Relieving Space”

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Frontiers of Structural and Civil engineering 2019年第4期13卷 767-786页

作者： e. d. PASIOU I. STAVRAKAS d. TRIANTIS S. K. KOURKOULIS department of Mechanics Laboratory of Testing and Materials National Technical University of Athens Athens 15773 Greece department of electronics Laboratory of Electrical Characterization of Materials and Electronic Devices Technological Edu-cational Institution of Athens Athens 12210 Greece

The mechanical response of mutually interconnected.e.istyles is stud.e. experimentally. The specimens are made of two marble blocks connected to each other with an “I”-shaped titanium connector placed in grooves sculptured on the blocks and covered with cementitious material. The specific way of connecting epistyles simulates the one used by scientists restoring the ancient “connections” of the epistyles of the Parthenon Temple. This “connection”, although designed to sustain mainly tensile loading, undertakes, also, shear load, in case of excitations imposing to the epistyles displacements normal to the connector’s axis. Attention is focused to enlighten the role of a novel design technique aiming to relieve the stress field around the connector. According to this technique, part of the connector’s web is left uncovered, forming the so-called “Relieving Space”, assisting the unconstrained deformation of the connector. Both traditional and innovative sensing techniques were employed in an effort to obtain data from the interior of the three-material-complex (marble-cementitious material-titanium). Analysis of the data indicated that the “Relieving Space” reduces the overall stiffness of the system, protecting marble in case of over-loading. Moreover, it was concluded that the innovative techniques employed provide pre-failure indicators well in advance of the catastrophic failure of the specimens.

关键词： monuments of cultural heritage marble epistyles pressure stimulated currents acoustic emission digital image correlation

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基础电路分析

基础电路分析

作者： d.e.·约翰逊(d.e. Johnson)

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计算机程序设计技巧

计算机程序设计技巧

Application of exp-function Method to Wave Solutions of the Sine-Gordon and Ostrovsky equations

作者： d.e.·克努特(d.e. Knuth)

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Acta Mathematicae Applicatae Sinica 2016年第3期32卷 571-578页

作者： R.A.TALARPOSHTI S.e.GHASeMI Y.RAHMANI d.d.GANJI department of Mathematics Faculty of Mathematical SciencesMazandaran University Young Reseachers and.e.ite Club Sari BranchIslamic Azad University department of Mechanical engineering Babol University of Technology

In this work, the exp-function method is employed to find new wave solutions for the Sine-Gordon and Ostrovsky equation. The equations are simplified to the nonlinear partial differential equations and then different types of exact solutions are extracted by this method. It is shown that the exp-function method is a powerful analytical method for solving other nonlinear equations occurring in nonlinear physical phenomena. Results are presented in contour plots that show the different values of effective parameters on the velocity profiles.

关键词： exp-function method nonlinear equation wave solutions Sine-Gordon equation Ostrovsky equation

我者自述之———巴赫金视角观照下的叙事身份

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叙事（中国版） 2010年第1期 99-113页

作者： d.e.维康王静以色列海法大学

本文标题借用德里达的著作《他者之耳》(第13页),其含混性并非偶然。因为"我"(I)作为受话者和作为述行叙述者的主体—客体,确切地说,这是一个有关叙事身份(narrative identity)的探讨。

关键词：赫金主体—客体陀思妥耶夫斯基受话者含混性 narrative 美学意义道德主体小说叙事

The role of net ecosystem productivity and of inventories in climate change research:the need for “net ecosystem productivity with harvest”,NePH

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Forest ecosystems 2021年第1期8卷 199-206页

作者： e.d.Schulze R.Valentini O.Bouriaud Max planck institute for biogeochemistry box 100164jenagermany department of forest environment and resources university of tuscia01100 viterboitaly Laboratoire d’inventaire forestier ignnancyfrance

Background:There is an urgent need for quantifying the terrestrial carbon sink in the context of global carbon ***,neither the flux measurements,nor the national wood balances fulfil this *** this discussion article we point at various shortcomings and necessary improvements of these approaches in order to achieve a true quantification of the carbon exchange of land ***:We discuss the necessity of incorporating all lateral fluxes,but mainly the export of biomass by harvest,into the flux balance and to recognize feedbacks between management and fluxes to make flux measurements compatible with *** the same time,we discuss the necessity that national reports of wood use need to fully recognize the use of wood for energy *** approaches of establishing an ecosystem carbon balance,fluxes and inventories,have ***:Including harvest and feedbacks by management appears to be the main requirement for the flux approach.A better quantification of wood use for bioenergy seems a real need for integrating the national wood balances into the global carbon cycle.

关键词： Terrestrial carbon sink Flux measurements Carbon inventories National wood balances

Bayesian model averaging(BMA)for nuclear data evaluation

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Nuclear Science and Techniques 2024年第11期35卷 193-218页

作者： e.Alhassan d.Rochman G.Schnabel A.J.Koning SCK CeN(Belgian Nuclear Research Centre) Boeretang 2002400 MolBelgium Laboratory for Reactor Physics and Thermal‑Hydraulics Paul Scherrer Institute5232 VilligenSwitzerland Nuclear data Section International Atomic Energy Agency(IAEA)ViennaAustria division of Applied Nuclear Physics Department of Physics and AstronomyUppsala UniversityUppsalaSweden

To ensure agreement between theoretical calculations and.e.perimental data,parameters to selected nuclear physics models are perturbed and fine-tuned in nuclear data *** approach assumes that the chosen set of models accurately represents the‘true’distribution of considered ***,the models are chosen globally,indicating their applicability across the entire energy range of ***,this approach overlooks uncertainties inherent in the models *** this work,we propose that instead of selecting globally a winning model set and proceeding with it as if it was the‘true’model set,we,instead,take a weighted average over multiple models within a Bayesian model averaging(BMA)framework,each weighted by its posterior *** method involves executing a set of TALYS calculations by randomly varying multiple nuclear physics models and their parameters to yield a vector of calculated ***,computed likelihood function values at each incident energy point were then combined with the prior distributions to obtain updated posterior distributions for selected cross sections and the elastic angular *** the cross sections and.e.astic angular distributions were updated locally on a per-energy-point basis,the approach typically results in discontinuities or“kinks”in the cross section curves,and these were add.e.sed using spline *** proposed BMA method was applied to the evaluation of proton-induced reactions on ^(58)Ni between 1 and 100 *** results demonstrated a favorable comparison with experimental data as well as with the TeNdL-2023 evaluation.

关键词： Bayesian model averaging(BMA) Nuclear data Nuclear reaction models Model parameters TALYS code system Covariances

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滤波器理论导论

滤波器理论导论

Heat transfer study on solid and porous convective fins with temperature-dependent heat generation using efficient analytical method

作者： d.e.·约翰逊(d.e. Johnson)

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Journal of Central South University 2014年第12期21卷 4592-4598页

作者： S.e.Ghasemi P.Valipour M.Hatami d.d.Ganji Young Reseachers and.e.ite Club Qaemshahr Branch Islamic Azad University department of Textile and Apparel Qaemshahr Branch Islamic Azad University department of Mechanical engineering Esfarayen University of Technology department of Mechanical engineering Babol University of Technology

A simple and highly accurate semi-analytical method, called the differential transformation method(dTM), was used for solving the nonlinear temperature distribution equation in solid and porous longitudinal fin with temperature dependent internal heat generation. The problem was solved for two main cases. In the first case, heat generation was assumed variable by fin temperature for a solid fin and in second heat generation varied with temperature for a porous fin. Results are presented for the temperature distribution for a range of values of parameters appearing in the mathematical formulation(e.g. N, εG, and G). Results reveal that dTM is very effective and convenient. Also, it is found that this method can achieve more suitable results in comparison to numerical methods.

关键词： heat transfer convective fin solid and porous fin heat generation analytical method thermal analysis