PASS: a simple classifier system for data analysis

Let x be a vector of predictors and y a scalar response associated with it. Consider the regression problem of inferring the relantionship between predictors and response on the basis of a sample of observed pairs (x,y). This is a familiar problem for which a variety of methods are available. This paper describes a new method based on the classifier system approach to problem solving. Classifier systems provide a rich framework for learning and induction, and they have been suc:cessfully applied in the artificial intelligence literature for some time. The present method emiches the simplest classifier system architecture with some new heuristic and explores its potential in a purely inferential context. A prototype called PASS (Predictive Adaptative Sequential System) has been built to test these ideas empirically. Preliminary Monte Carlo experiments indicate that PASS is able to discover the structure imposed on the data in a wide array of cases

Pattern classification using charge transfer devices

The feasibility of using charge transfer devices in the classification of multispectral imagery was investigated by evaluating particular devices to determine their suitability in matrix multiplication subsystem of a pattern classifier and by designing a protype of such a system. Particular attention was given to analog-analog correlator devices which consist of two tapped delay lines, chip multipliers, and a summed output. The design for the classifier and a printed circuit layout for the analog boards were completed and the boards were fabricated. A test j:g for the board was built and checkout was begun

Modular Networks: Learning to Decompose Neural Computation

Scaling model capacity has been vital in the success of deep learning. For a typical network, necessary compute resources and training time grow dramatically with model size. Conditional computation is a promising way to increase the number of parameters with a relatively small increase in resources. We propose a training algorithm that flexibly chooses neural modules based on the data to be processed. Both the decomposition and modules are learned end-to-end. In contrast to existing approaches, training does not rely on regularization to enforce diversity in module use. We apply modular networks both to image recognition and language modeling tasks, where we achieve superior performance compared to several baselines. Introspection reveals that modules specialize in interpretable contexts.Comment: NIPS 201

Concerning the emergence of tag-mediated lookahead in classifier systems

This paper, after a general introduction to the area, discusses the architecture and learning algorithms that permit automatic parallel, distributed lookahead to emerge in classifier systems. Simple additions to a "standard" classifier system suffice, principally a new register called the virtual strength register, and a provision to use the bucket brigade credit assignment algorithm in "virtual" mode to modify values in this register. With these additions, current actions are decided on the basis of the expected values associated with the "lookahead cones" of possible alternatives.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/28531/1/0000328.pd

XCS Performance and Population STRUCTURE IN MULTI-STEP ENVIRONMENTS

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN039134 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

The Vigiles of Rome

The Visiles were a fire brigade, carrying out nightly patrols throughout the City of Rome. Originally 3,500 strong, they were increased to 7,000. The scale of their fire patrols' makes them unioue. Their equipment was basic but effective. The aqueducts made their operations possible by providing adequate supplies of water throughout the City. Rome had a very bad fire problem, accentuated by the occurrence of several fires at once. Augustus applied the military technique of patrolling to the water resources already available. The conventional sizes of centuries and cohorts were appropriate for fire fighting, and the Visiles were organised as soldiers. But they were non-combative, and recruited largely from freedmen. The continuous night duty was arduous, and around 8% of the men resigned each year. In contrast with soldiers, visiles served for a normal period of only 6 years. There were a few openings for promotion to nco or technician, but further opportunities on the operational side were rare. Nco's and technicians could serve for many years. The officers (centurions and tribunes) had a military background. Centurions could serve for many years; tribunes did not. The prefect had judicial functions in addition to overall responsibility for the Vigiles, and was less concerned with active fire fighting. The two fields of ancient history and fire fighting have been brought together. The evidence used to be under-utilised, but can be very informative. Probably the most neglected aspect was that of numbers. The two nominal rolls of the Fifth Cohort are key items, telling us the total numbers of men and also providing us with clues as to the length of service and the nature of the career. Within this framework, we can fit the evidence into a coherent picture. With so many points at which the Vigiles were potentially effective, they must be ranked among the world's more effective fire brigades

A human factors study of shuttle/space station cargo handling techniques Final report

Human factors study of IVA cargo transfer from shuttle to space statio

Design of LCOS microdisplay backplanes for projection applications

De evolutie van licht emitterende diodes (LED) heeft ervoor gezorgd dat het op dit moment interessant wordt om deze componenten als lichtbron te gebruiken in projectiesystemen. LED’s hebben belangrijke voordelen vergeleken met klassieke booglampen. Ze zijn compact, ze hebben een veel grotere levensduur en ogenblikkelijke schakeltijden, ze werken op lage spanningen, etc. LED’s zijn smalbandig en kunnen een groterekleurenbereik realiseren. Ze hebben momenteel echter een beperkte helderheid. Naast de lichtbron is het type van de lichtklep ook bepalend voor de kwaliteit van een projectiesysteem. Er bestaan verschillende lichtkleptechnologieën waaronder die van de reflectieve LCOS-panelen. Deze lichtkleppen kunnen zeer hoge resoluties hebben en wordenvaak gebruikt in kwalitatieve, professionele projectiesystemen. LED’s zijn echter totaal verschillend van booglampen. Ze hebben een andere vorm, package, stralingspatroon, aansturing, fysische en thermische eigenschappen, etc. Hoewel er een twintigtal optische architecturen bekend zijn voor reflectieve beeldschermen (met een booglamp als lichtbron), zijn ze niet geschikt voor LED-projectoren en moeten nieuwe optische architecturen en een elektronische aansturing ontwikkeld worden. In dit doctoraat werd er hieromtrent onderzoek gedaan. Er werd uiteindelijk een driekleurenprojector (R, G, B) met een efficiënt LED-belichtingssysteem gebouwd met twee LCOS-lichtkleppen. Deze LEDprojector heeft superieure eigenschappen (zeer lange levensduur, beeldkwaliteit, etc.) en een matige lichtopbrengst