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Minimal perceptrons for memorizing complex patterns
Pastor, M.,Song, J.,Hoang, D.T.,Jo, J. North-Holland Pub. Co 2016 PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIO Vol.462 No.-
Feedforward neural networks have been investigated to understand learning and memory, as well as applied to numerous practical problems in pattern classification. It is a rule of thumb that more complex tasks require larger networks. However, the design of optimal network architectures for specific tasks is still an unsolved fundamental problem. In this study, we consider three-layered neural networks for memorizing binary patterns. We developed a new complexity measure of binary patterns, and estimated the minimal network size for memorizing them as a function of their complexity. We formulated the minimal network size for regular, random, and complex patterns. In particular, the minimal size for complex patterns, which are neither ordered nor disordered, was predicted by measuring their Hamming distances from known ordered patterns. Our predictions agree with simulations based on the back-propagation algorithm.
EXERGY ANALYSIS OF A VAPOR ABSORPTION HEAT TRANSFORMER USING MODIFIED GUOY–STODALA EQUATION
J. PASTOR,G. SACHDEVA,R. BILASH 대한설비공학회 2014 International Journal Of Air-Conditioning and Refr Vol.22 No.3
In the present work, thermodynamic analysis of a Lithium bromide–water-based absorption heat transformer (AHT) is done using a mathematical model. The study includes exergy analysis with the introduction of external fluid arrangements working as the interface of heat exchange for the various components of the model. Quantitative results are obtained for a set of inputs and modified Guoy–Stodala equation is used to include the real heat exchange temperatures in the study. These results are compared to the classical approach. It is observed that the total irreversibility calculated by the modified approach comes out to be 26.1% more than the exergy destruction obtained by the classical approach. Next, different operating parameters are varied to understand the effect of these on exergy destruction using a computer programme code. Thus, a conclusion is drawn in the form of graphs, as to how the system performance can be improved. Using the concept of irreversibility, the study finds that the performance of the system can be enhanced by decreasing the temperature of evaporator and generator or by increasing the temperature of condenser and absorber.
Contributed Mini Review : The uniqueness of the plant mitochondrial potassium channel
( Donato Pastore ),( Mario Soccio ),( Maura Nicoletta Laus ),( Daniela Trono ) 생화학분자생물학회 2013 BMB Reports Vol.46 No.8
The ATP-inhibited Plant Mitochondrial K+ Channel (PmitoKATP) was discovered about fifteen years ago in Durum Wheat Mitochondria (DWM). PmitoKATP catalyses the electrophoretic K+ uniport through the inner mitochondrial membrane; moreover, the co-operation between PmitoKATP and K+/H+ antiporter allows such a great operation of a K+ cycle to collapse mitochondrial membrane potential (ΔΨ) and ΔpH, thus impairing protonmotive force (Δp). A possible physiological role of such ΔΨ control is the restriction of harmful reactive oxygen species (ROS) production under environmental/oxidative stress conditions. Interestingly, DWM lacking Δp were found to be nevertheless fully coupled and able to regularly accomplish ATP synthesis; this unexpected behaviour makes necessary to recast in some way the classical chemiosmotic model. In the whole, PmitoKATP may oppose to large scale ROS production by lowering ΔΨ under environmental/oxidative stress, but, when stress is moderate, this occurs without impairing ATP synthesis in a crucial moment for cell and mitochondrial bioenergetics. [BMB Reports 2013; 46(8): 391-397]
J. V. PASTOR,R. PAYRI,J. M. SALAVERT,J. MANIN 한국자동차공학회 2012 International journal of automotive technology Vol.13 No.5
Spray sizing that records fluorescent emission and scattered light has been widely applied to spray diagnostics over the last two decades. Different experimental strategies have been developed, but comparing the different solutions offered has remained of interest to experimentalists. In this work, a comparison of two fluorescence strategies for measuring droplet size in the liquid phase of a last-generation DI diesel spray is conducted. The natural fluorescent emission of a commercial diesel fuel and the fluorescence emitted by a tracer (Rhodamine B) are compared using theoretical and experimental approaches. The LIF/Mie ratio commonly called Planar Droplet Sizing (PDS) technique is applied in two different ways to elucidate the possible advantages of using a fluorescent dopant. The sprays were injected under non-evaporative conditions into a constant pressure vessel that simulates densities present at the moment of injection in currently used passenger car diesel engines. Characterization of the signal properties was performed by measuring the absorption coefficient, fluorescence emission spectrum, quantum yield and lifetime of both configurations. The scattered light and fluorescence intensities were calculated to verify the dependencies of the droplet surface and volume. When applying the two techniques to quantify droplet size in dense diesel sprays, the results show that signal weakness and lack of control over the properties of natural fluorescence produce distortion in the shape of the spray and cause measurements to be unreliable.
Seonghyu Shin,Marcial Pastor-Corrales,Qijiang Song,Gaofeng Jia,Miok Woo,Perry Cregan 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Recently whole genome SNP genotyping has been used to do association analysis and to map a gene of interest. Here we report application of bulked segregant analysis(BSA) using Infinium HD assay with ‘BARC Bean6K_3’, a SNP genotyping beadchip containing 5,399 SNPs for common bean to locate a target gene. We used BSA using Infinium HD assay was performed to find the candidate region of a single dominant rust resistant gene in PI310762, a common bean cultivar. And SSR markers were identified and mapped on the candidate region using F2 population derived from the cross of susceptible Pinto114 x resistant PI310762. BSA revealed the candidate region of the resistant gene is on chromosome 4 where we developed nine SSR markers. Three SSR markers (beanssr1170, beanssr1168, and beanssr1167) of them appeared closely linked to the resistant gene which is located between beanssr1167 at 0.1cM and beanssr1170 at 0.5cM on chromosome 4. This study showed BSA using high-throughput whole genome SNP genotyping is a very fast and efficient method to locate a gene of interest on chromosome.
Effect of Braid Structure on Yarn Cross-Sectional Shape
Lyons, Jason,Pastore, Christopher M. The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.3
The effect of braid construction parameters on yarn cross-sectional shape is presented in this paper. The location of the yam within the braid unit cell is quantified by a compaction factor. A range of braided fabrics were produced and optically measured for actual yarn cross-sectional shape. A comparison of the theoretical and experimental values shows good correlation. Design curves can be produced with the developed model to allow selection of appropriate braid process parameter to create yarns with desired cross-sectional geometries.