Comments, with reply, on 'convergence properties of Gram-Schmidt and SMI adaptive algorithms' by K. Gerlach and F.F. Kretschmer, Jr

The commenter summarizes Q-R decomposition techniques for solving the least squares (LS) problem and comments on associated aspects of the work presented by K. Gerlach and F.F. Kretschmer, Jr. (ibid., vol.267, no.1, Jan.90). In response to the commenter's statement that the statistical properties of the LS that determine the convergence performance are well known. Gerlach and Kretschmer assert that this is true only under the assumptions that have been used in the past to analyze the convergence performance of the canceler and for only a limited number of convergence performance measures. Gerlach and Kretschmer also address the commenter's points on overmatching degrees of freedom.<>     

J.-L. Starck,F. Murtagh,and A. Bijaoui,Image Processing and Data Analysis,The Multiscale Approach

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G. Burkhardt,U. Esser,H. Hefele,I. Heinrich,W. Hofmann,V. R. Matas,L. D. Schmadel,R. Wielen,and G. Zech (eds.), Astronomy and Astrophysics Abstrats

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H. J. Habing and H. J. G. L. M. Lamers (eds.), Planetary Nebulae,IAU Symposium 180

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R. Burkhardt, U. Esser, H. Hefele, I. Heinrich, W. Hoffmann, V. R. Matas, L. D. Schmadel, R. Wielen and G. Zech (eds.), Astronomy and Astrophysics Abstracts, Volumes 69A and 69B, Literature 1998, Part 1, published for Astronomisches Rechen-Institut

The reviewed Volumes of the AAA series record, summarize and index nearly 12 000 papers covering all aspects of astronomy and space sciences, published throughout the world during the first half of the year 1998. The AAA series is the most important source of information on progress in the scientific disciplines. They have become an indispensable source of information for scientists and students involved in the Universe research. This revised version was published online in August 2006 with corrections to the Cover Date.     

DO-160D,E,F,G 各版本雷电试验差异

飞机在高空中飞行,非常容易遭受雷击。飞机适航取证过程中,机载设备的雷电试验是重要环节,以确保飞机安全。文中论述了 DO-160各章节内容,重点对雷电试验相关章节进行了解析。通过对 DO-I60D、DO.I60EDO-160F和 DO-160G4个版本关于雷电直接效应试验和雷电问接效应试验方面的对比,总结了不同版本标准试验要求和试验方法的差异,分析了差异原因。本研究结果可为现阶段机载设备提供合理的雷电试验适航验证方法。     

F. P. Pijpers,J. Christensen-Dalsgaard,and C. S. Rosenthal (eds.), SCORe '96: Solar Convection and Oscillations and their Relationship

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D. Winterhalter,J.T. Gosling,S.R. Habbal,W.S. Kurth,and M. Neugebauer (eds.). Solar Wind Eight

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S. W. Bougher,D. M. Hunten,and R. J. Phillips (eds.) Venus II - Geology,Geophysics, Atmosphere,and Solar Wind Environment

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Mikhail Ya. Marov,Valery L. Shematovich,Dmitry V. Bisikalo,and Jean-Claude Gerard,Nonequilibrium Processes in the Planetary and Cometary Atmospheres: Theory and Applications

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Advances in bistatic radar (Willis, N.J. and Griffiths, H.D., Eds.; 2007) [Book Review]

The editors have collected a comprehensive set of monographs that provide insight into the more recent history of bistatic radar design and implementation. This volume combines improved details of the environment along with novel system applications. Each chapter is authored by radar experts who had the vision and motivation to tackle a daunting development problem, and share their view of the successes and remaining implementation challenges. The book is divided into two parts: Bistatic/Multistatic Systems and Bistatic Clutter and Signal Processing. The book is an essential addition to the modern radar engineer's library.     

The chromospheric network dynamics as derived from the analysis of Ca II K and He I 1083 nm lines

We present results of line profile analysis of observations simultaneously performed around the Ca II K and He I (1083 nm) lines, using the Horizontal Spectrograph of the Vacuum Tower Telescope of NSO/SP. From the spectral analysis of a 83 min long sequence of CCD spectra, we derive some dynamical properties of the main components of the quiet chromosphere: i) the magnetic network, ii) the cell interior. We present a whole set of amplitude spectra near 5 and 3 min periods for the two lines; K₃ and He I velocity spectra extending up to 100 mHz are also considered, for the first time.     

K. Koyama, S. Kitamoto and M. Itoh (eds.), The Hot Universe, IAU Symposium

This book concerns the publication of the proceedings of an IAU Symposium held in Tokio in the summer of 1997. As implied by the title, it provides an overall review of our knowledge on all aspects of high-energy phenomena occurring in the universe obtained via the observations in X- and gamma-rays with orbiting satellites. It contains 44 invited (4 pages each) and 132 (2 pages each) contributed papers covering: Sun, stars, supernovae and their remnants, galaxies and their clusters, white dwarfs and neutron stars, black hole binaries, active galactic nuclei, gamma-ray bursts, large scale structure and hot intergalactic medium, and a chapter on future space programs in X- and gamma-ray astronomy. Many of the contributions have since appeared in the astronomical literature. The invited reviews, although very concise, are generally valuable in presenting the most relevant points of the various subjects. The book is for professional astronomers and may serve as a quick and very useful reference to becoming acquainted with the main developments in the field of high-energy astrophysics beginning of 1998. This revised version was published online in August 2006 with corrections to the Cover Date.     

C. C. Petersen and J. C. Brandt,Hubble Vision,Early Adventures with the Hubble Space Telescope

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