نتایج جستجو برای: equivalent nodal forces

تعداد نتایج: 245173  

2007
Jan Drahokoupil

A variety of foreign-led economies has emerged in Central and Eastern Europe in the late nineties. This paper explains the emergence of the competition state in the region and analyzes its political support and institutional underpinning. While the structural power of transnational capital and integration into the European regulatory framework had major roles in steering the state into the comp...

This paper develops a method for nodal pricing and market clearing mechanism considering reliability of the system. The effects of components reliability on electricity price, market participants’ profit and system social welfare is considered. This paper considers reliability both for evaluation of market participant’s optimality as well as for fair pricing and market clearing mechanism. To ac...

2015
Piyush Kumar Mayukh Dass Shivina Kumar

The strategy literature has long debated the relative contribution of firm versus industry related factors as the drivers of firm profitability. The industrial organization perspective on this issue suggests that the structure of an industry is a key determinant of profitability (e.g., Porter, 1979). On the other hand, the resource-based view of the firm posits that strategic advantages conferr...

Journal: :civil engineering infrastructures journal 0
mohsenali shayanfar center of excellence for fundamental studies in structural engineering, school of civil engineering, iran university of science and technology mehrollah rakhshanimehr department of civil engineering, university of alzahra, tehran, iran reza zare bidoki center of excellence for fundamental studies in structural engineering, school of civil engineering, iran university of science and technology

nonlinear static procedure (nsp) is a common technique to predict seismic demands on various building structures by subjecting a monotonically increasing horizontal loading (pushover) to the structure. therefore, the pushover analysis is an important part of each nsp. accordingly, the current paper aims at investigating the efficiencyof various algorithms of lateral load patterns applied to the...

2016
S. Neves A. Azevedo

The design of high-speed railway bridges comprises a set of demands, from safety and serviceability aspects, to new types of equipment and construction solutions. In order to perform an accurate and realistic evaluation of the corresponding dynamic behavior, adequate analysis tools that take into account the complexity of the train-bridge system are required. These computational tools must be b...

Journal: :the journal of tehran university heart center 0
mohammad hasan namazi modarres hospital, shaheed beheshti university of medical sciences, tehran, iran. hassan kamalzadeh modarres hospital, shaheed beheshti university of medical sciences, tehran, iran. morteza safi modarres hospital, shaheed beheshti university of medical sciences, tehran, iran. reza karbasi afshar modarres hospital, shaheed beheshti university of medical sciences, tehran, iran. mohammad reza motamedi modarres hospital, shaheed beheshti university of medical sciences, tehran, iran. habibollah saadat modarres hospital, shaheed beheshti university of medical sciences, tehran, iran.

background: complete atrioventricular block (av block) is a serious complication of slow pathway ablation therapy in the treatment of atrioventricular nodal re-entrant tachycardia (avnrt).   the present study was aimed at determining whether the electroanatomical pace mapping of koch’s triangle could significantly improve the safety, efficiency, and efficacy of selective slow pathway ablation i...

2003
Paul H. Frampton

Global fits to precision cosmological data which show that there is a dark energy component comprising about 2/3 of the total cosmological energy also hint that a dark energy with w = P/ρ < −1 is viable, even favored. Here we discuss implications of such a surprising w, including whether it jeopardizes vacuum stability. It appears to be secure in microscopic processes, but why bulk dark energy ...

Journal: :J. Comput. Physics 2013
Nathaniel R. Morgan Mark A. Kenamond Donald E. Burton Theodore C. Carney Daniel Ingraham

A new method is presented for modeling contact surfaces in Lagrangian cell-centered hydrodynamics (CCH). The contact method solves a multi-directional Riemann-like problem at each penetrating or touching node along the contact surface. The velocity of a penetrating or touching node and the corresponding forces are explicitly calculated using the Riemann-like nodal solver. The contact method wor...

Seyed Amirodin Sadrnejad,

A finite element solution based on equevalent elements is proposed for the static and dynamic analysis of tallhigh tensioned cable antennas. To reduce high number of degrees of freedom in space frame body of a structure, a simple equivalent beam element is defined for each simulative substructure. This numerical procedure is applicable to analyze complex three dimensional assemblies of substruc...

Journal: :journal of research in medical sciences 0
mehdi tazhibi departments of biostatistics and epidemiology, school of public health, isfahan university of medical sciences, isfahan, iran mahsa fayaz departments of biostatistics and epidemiology, school of public health, isfahan university of medical sciences, isfahan, iran fariborz mokarian ùdepartment of internal medicine, school of medicine, isfahan university of medical sciences, isfahan, iran

background: the aim of this study was to detect prognostic factors in recurrent breast cancer metastasis. materials and methods: th is retrospective cohort study employed data from 996 breast cancer patients of isfahan seyed-o-shohada research center from 1998 to 2010. stratifi ed cox proportional hazards model, marginal approach, was used to evaluate the prognostic value of estrogen receptor, ...

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