By using the equivalence between metric and Palatini f(R) (or “modified”) gravities with ω = 0,−3/2 Brans-Dicke theories, it is shown that the EhlersGeren-Sachs theorem of general relativity is extended to modified gravity. In the case of metric f(R) gravity studied before, this agrees with previous literature.

This paper presents a novel approach to solve multiclass classification problems using pure evolutionary techniques. The proposed approach is called Evolution of Geometric Structures algorithm, and consists in the evolution of several geometric structures such as hypercubes, hyperspheres, hyperoctahedrons, etc. to obtain a first division of the samples space, which will be re-evolved in a secon...

A Theory of Employment Guarantees: Contestability, Credibility and Distributional Concerns* This paper develops a theory of employment guarantees when labour markets are imperfect and when the credibility of government policy announcements could be in doubt. The basic feature of an EGS is that any individual who satisfies a set of specified criteria is guaranteed public employment at a given wa...

Hot Dry Rock (HDR) is the most potential renewable geothermal energy in future. Enhanced Geothermal System (EGS) effective method for development and utilization of HDR resources, fractures are main flow channels one important conditions studying heat transfer process EGS. Therefore, mechanism EGS have been hot spots research. Due to particularity mathematical models transfer, research this fie...

The increasing steel price makes a tool with a high quality algorithm to reduce steel beam waste more important. The cut-optimization of stored steel beams is a classical cut-optimization problem with one exception, because beams are stored in several different lengths, the algorithm should not only deal with where a beam should be cut it should choose the appropriate length of stock beam to us...

This paper presents a systematic methodology for sustainable process systems design, combining the principles of industrial ecology, process design and process integration, Life Cycle Assessment (LCA) and multi-objective optimization (MOO). The superstructure considers an extended decision perimeter and embeds models based either on flowsheeting software or average market technologies, for whic...

The 420 MPa grade offshore engineering steels with the different Mo contents were fabricated through Ca deoxidation. effect of content on microstructure and impact toughness coarse-grained heat-affected zone (CGHAZ) after welding heat input 100 kJ/cm investigated by simulation high-temperature laser scanning confocal microscopy (HTLSCM). As is increased from 0.08 to 0.16 wt%, at ?40°C 15 160 J,...