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On The Relative Efficiencies Of Context Free Grammar Recognizers
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Book Synopsis On the Relative Efficiencies of Context-free Grammar Recognizers by : T. V. Griffiths
Download or read book On the Relative Efficiencies of Context-free Grammar Recognizers written by T. V. Griffiths and published by . This book was released on 1965 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of diverse recognition procedures that have been proposed for parsing sentences with respect to a context-free grammar are described in this paper by means of a common device. Each procedure is defined by giving an algorithm for obtaining a nondeterministic Turing Machine recognizer that is equivalent to a given context-free grammar. The formalization of the Turing Machine has been chosen to make possible particularly simple descriptions of the parsing procedures considered.
Book Synopsis On the Relative Efficiencies of Context-free Grammar Recognizers by : Thomas V. Griffiths
Download or read book On the Relative Efficiencies of Context-free Grammar Recognizers written by Thomas V. Griffiths and published by . This book was released on 1965 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A number of diverse recognition procedures that have been proposed for parsing sentences with respect to a context-free grammar are described in this paper by means of a common device. Each procedure is defined by giving an algorithm for obtaining a nondeterministic Turing Machine recognizer that is equivalent to a given context-free grammar. The formalization of the Turing Machine has been chosen to make possible particularly simple descriptions of the parsing procedures considered.
Book Synopsis Production of H− (1s2) by Hydrogen Atom Collisions by : R. A. Mapleton
Download or read book Production of H− (1s2) by Hydrogen Atom Collisions written by R. A. Mapleton and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The prior and post Born matrix elements are used to calculate the cross sections for H( - )(1s2) production in hydrogen atom collisions. In contrast to the original version of this work done by Mapleton in 1960, the plane wave approximation to the Coulomb function is partially corrected. The same H( - ) wave functions are used, and the post cross sections are substantially unaltered. Cross sections calculated with the improved H( - ) wave function as compared with the other H( - ) wave functions are from twenty to thirty-five per cent larger for the prior case and twenty to thirty per cent larger for the post case. The post-prior discrepancy, expressed as a ratio, varies between 0.001 and 0.33. (Author).
Book Synopsis Matrix Criteria for Arbitrary Reliability in Iterated Neural Nets by : Rocco H. Urbano
Download or read book Matrix Criteria for Arbitrary Reliability in Iterated Neural Nets written by Rocco H. Urbano and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a previous paper by this author, the problem of achieving arbitrary reliability for combinatorial nets from arbitrarily unreliable elements was reduced to the study of convergence properties of an associated polynomial system. In this paper simple criteria which specify the convergence of such a system to a nodal fixed point are obtained from known results in matrix theory. (Convergence to a nodal point implies that the corresponding net approaches reliability arbitrarily near 1 for a particular function.) Theorems are also given which show that it is possible to obtain from a single system converging to a nodal fixed point, many systems having this property.
Book Synopsis A Study of the Nighttime Ionosphere and Its Reaction Rates by : William Swider (Jr.)
Download or read book A Study of the Nighttime Ionosphere and Its Reaction Rates written by William Swider (Jr.) and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Expansion of Initial High-current Spark Channels by : Heinz Fischer
Download or read book Expansion of Initial High-current Spark Channels written by Heinz Fischer and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrophoretic Power Generation in Thermally Ionized Plasmas by : C. C. Leiby (Jr.)
Download or read book Electrophoretic Power Generation in Thermally Ionized Plasmas written by C. C. Leiby (Jr.) and published by . This book was released on 1965 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Druyvesteyn's solutions for electrophoretically induced gas flows in electrical discharges in gases were extended over a larger pressure range and corrected for the influence of Debye shielding effects. The effects of molecular or 'slip' flow were also taken into account. These more accurate and general solutions were applied to the reverse phenomenon of space charge field generation arising from the flow of a thermally ionized cesium plasma through a tube. Under such flow conditions, a non-linear differential equation for the axial pressure distribution was obtained but not solved. However, it was possible to obtain estimates of the ranges of cesium pressure, temperature and tube radii which would be required for sensible levels of electric power generation. Anaphoretic flow power levels of the order of 0.1 to 10 watts, in tubes of laboratory dimensions (radii of 10 cm or less), appear feasible at temperatures from 1700 to 2400K. Sensible power generation levels at lower temperatures require very large diameter tubes, and therefore are not feasible. (Author).
Book Synopsis On the Acoustic Basis of the Perception of Intonation by Linguists by : Philip Lieberman
Download or read book On the Acoustic Basis of the Perception of Intonation by Linguists written by Philip Lieberman and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement Techniques in Clouds by : Donald R. Fitzgerald
Download or read book Measurement Techniques in Clouds written by Donald R. Fitzgerald and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Band Edge Distortion in Heavily Doped Germanium by : Freeman D. Shepherd (Jr.)
Download or read book A Study of Band Edge Distortion in Heavily Doped Germanium written by Freeman D. Shepherd (Jr.) and published by . This book was released on 1965 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details of the energy band structure of degenerate n-type germanium were determined by analysis of fine structure in the 4.2K volt-ampere characteristic of germanium tunnel diodes. No shift in the relative energy of the conduction band minima was observed. The band edge is found to be exponentially distributed with 1/e energies of the order of 10 MeV. There appears to be an ordering mechanism among the group V impurity atoms used as substrate dopants. (Author).
Book Synopsis Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid by : Marvin S. Brooks
Download or read book Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid written by Marvin S. Brooks and published by . This book was released on 1965 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study on the zone refining of the binary system triphenyl antimony-benzoic acid is described. The isotope Sb124, which is a strong gamma emitter, was employed as a tracer; this allowed a rapid in situ nondestructive analysis, closely spaced experimental points, and the opportunity to study distribution as a function of varying experimental conditions. With the aid of computers (IBM 7090 and IBM 7044) apparent k's were calculated and the experimental data compared with those predicted from various mathematical models. (Author).
Book Synopsis Minimax Detection Station Placement by : Richard D. Smallwood
Download or read book Minimax Detection Station Placement written by Richard D. Smallwood and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Earth-to-space Communications at Millimeter Wavelengths by : Edward E. Altshuler
Download or read book Earth-to-space Communications at Millimeter Wavelengths written by Edward E. Altshuler and published by . This book was released on 1965 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is expected that with the exploration of outer space, a requirement for high data rate earth-to-space communication channels will arise. A program to investigate the feasibility of using the millimeter-wave region of the spectrum for this application is presented. The theory of atmospheric attenuation resulting from losses due to absorption, scattering and refraction processes is reviewed and used to estimate propagation losses produced by atmospheric gases, clouds and precipitation. Curves of total atmospheric attenuation and noise level as a function of meteorological parameters and antenna elevation angle are also presented. A series of experiments designed to obtain as much information as possible on the limitations imposed by the atmosphere on millimeter-wave propagation is considered. Although experiments using natural celestial bodies such as the sun, moon, planets and galaxies as radio sources are emphasized, those which would utilize aircraft, rockets and satellites are also mentioned. Finally, the characteristics of a recently installed precision 29-ft antenna designed to operate at 35 Gc (wavelength = 8.6 mm) with a traveling-wave maser as a preamplifier for the radiometer are outlined along with the specific experiments for which this antenna system will be used. (Author).
Book Synopsis The Nonlinear Interaction of a Radio-frequency Wave with an Inhomogeneous Plasma Slab by : Robert J. Papa
Download or read book The Nonlinear Interaction of a Radio-frequency Wave with an Inhomogeneous Plasma Slab written by Robert J. Papa and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Waves at a Plane Interface Between Vacuum and Plasma with the Magnetostatic Field Normal to the Interface by : K. U. Sivaprasad
Download or read book Surface Waves at a Plane Interface Between Vacuum and Plasma with the Magnetostatic Field Normal to the Interface written by K. U. Sivaprasad and published by . This book was released on 1965 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron-impact Energy Spectra of Acetone and 2-Butanone by : S. M. Silverman
Download or read book Electron-impact Energy Spectra of Acetone and 2-Butanone written by S. M. Silverman and published by . This book was released on 1965 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reflection of Gigacycle-per-second Ultrasonic Waves from an Optical-contact Bond by : Paul H. Carr
Download or read book Reflection of Gigacycle-per-second Ultrasonic Waves from an Optical-contact Bond written by Paul H. Carr and published by . This book was released on 1965 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
