We study the problem of knowledge reuse by a reinforcement learning agent. We are interested in how an agent can exploit policies that were learned in the past to learn a new task more efficiently in the present. Our approach is to elicit spatial hints from an expert suggesting the world states in which each existing policy should be more relevant to the new task. By using these hints with doma...

The purpose of this paper is to analyze the differences that immigrants have in the Spanish labour market. Immigrants in Spain come from a diversity of continents (Africa, South America, Eastern Europe, Asia, etc.), and there are substantial differences in characteristics not only among continents but also among countries in each continent. These differences are reflected in the labour market a...

MOTIVATION Detection of protein spots in two-dimensional gel electrophoresis images (2-DE) is a very complex task and current approaches addressing this problem still suffer from significant shortcomings. When quantifying a spot, most of the current software applications include a lot of background due to poor segmentation. Other software applications use a fixed window for this task, resulting...

background and aims: to evaluate the effect of temperature on wheat streak mosaic virus (wsmv) resistance phenotype, through total protein, phenol, and peroxidase activity in bread wheat, a factorial experiment was conducted using adl-cross (resistant) and marvdasht (susceptible) cultivars. materials and methods: results showed that incubation at 32c changed the gene expression for resistance ...

In recent years, increasing automotive safety by improving crashworthiness has been a focal point in the industry, employing high-strength steel such as press hardenable (PHS). addition to improved strength of individual parts body vehicle, resistance-spot-welded joints these is highly important obtain safe structure. general, dimensions weld nuggets are regarded one criteria for quality spot-w...

The delimitation of urban areas, and in Africa in particular, remains a challenging issue and is an important one for city management in a context of rapid urban growth. The objective of this study is to delineate the morphological limits of the urbanized city which is different from administrative boundaries. Two methods have been developed: the first one is using object-oriented classificatio...

The non-trivial choice of a good combination of microarray spotting buffer and slide chemistry is critical for the reliability of microarray hybridization experiments. This choice determines the morphology of spots and, moreover, the variance of that morphology. Both strongly affect how well the extracted intensity signals correspond to sample RNA abundances. Comparisons of different buffer/sli...

In this paper, we present the Sum ofPowers-Of-Two (SPOT) algorithm transformation that results in a high-speed IIR filter architecture by forcing the first few coefficients of the denominator polynomial to powers of two or sums of powers of two. The SPOT transform achieves the same result as achieved by conventional pipelining techniques such as scattered look-ahead and minimum order augmentati...

Integrated satellite-terrestrial networks can improve both the service coverage and spectral efficiency in spot-beam-based mobile satellite service system (MSS). In an integrated satellite-terrestrial network, MSS frequency is reused in both satellite spot beams and complementary ground component (CGC). Due to reuse of frequency, co-channel interference is present in both intra-component (betwe...

To reduce the thermal stress at clad layer and further crack generation in laser cladding process, a method of controlling cracks by changing energy density is proposed. Comparative thermal–mechanical coupling finite element analysis was performed on uniform rectangular convex shape beam spot processes plasma-sprayed MCrAlY coating through numerical simulation based ANSYS software. Results show...