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A computer PACKAGE FOR A GEOTECHNICAL ENGINEERING LABORATORY

computerS IN INDUSTRY 1993年第3期21卷 285-293页

作者： REDDY, ESB UNIV NOTTINGHAM DEPT CIVIL ENGNNOTTINGHAM NG7 2RDENGLAND

Geotechnical engineers need to study soil properties by conducting a number of field and laboratory tests. Processing geotechnical engineering laboratory test data is laborious and takes considerable time when doing it manually. The present paper explains the need of a computer package to process geotechnical engineering laboratory data and the details of a computer program which is being developed for this use. The different stages of the program are explained with the laboratory tests considered with the help of flow charts. The use of the program is illustrated with an example. Possible improvements to the program are proposed.

关键词： computer program BASIC INTERACTIVE MODE FLOW CHART GEOTECHNICAL ENGINEERING SOIL MECHANICS LABORATORY CLASSIFICATION TESTS TRIAXIAL TEST DIRECT SHEAR TEST CBR TEST CONSOLIDATION TEST DATA PROCESSING

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NEW METHOD FOR DIGITAL-computer EVALUATION OF CONVERTER HARMONICS IN POWER-SYSTEMS USING STATE-VARIABLE ANALYSIS

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IEE PROCEEDINGS-C GENERATION TRANSMISSION AND DISTRIBUTION 1981年第4期128卷 196-207页

作者： KITCHIN, RH Department of Electrical & Electronic Engineering Huddersfield Polytechnic Huddersfield UK

A detailed assessment of the frequency-domain approach normally used for evaluation of convertor harmonics is presented, limitations and inaccuracies are identified, and the need for an improved method is established. The theoretical basis of a new method, which simulates the individual switching processes within each convertor, is described. The method uses a modified state-variable approach to automatically formulate the 3-phase network equations, which are then linked with the convertor equations to give a time-domain solution. The computer program developed is capable of analysing power systems with interconnected components of any desired configuration, and the simultaneous operation of several convertor loads may be studied. When the time-domain solution reaches a periodic condition, the harmonic components are evaluated using a special-purpose Fourier-analysis program. The computed results of selected cases are presented to demonstrate the inherent accuracy of the method and to show its potential usefulness for other applications

关键词： Engineering mathematics and numerical techniques harmonics state variable analysis Power convertors and power supplies to apparatus power system interconnection Power engineering computing interconnected components frequency-domain analysis convertor harmonics harmonic components Fourier analysis power systems frequency-domain approach power system analysis computing computer program special-purpose Fourier-analysis program Power system management, operation and economics Integral transforms digital computer evaluation power convertors Network and transmission line calculations

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Semiautomatic sequence-specific assignment of proteins based on the tertiary structure -: The program st2nmr

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JOURNAL OF COMPUTATIONAL CHEMISTRY 2002年第3期23卷 335-340页

作者： Pristovsek, P Rüterjans, H Jerala, R Natl Inst Chem Ljubljana 1000 Slovenia Univ Frankfurt Inst Biophys Chem D-60439 Frankfurt Germany

The sequence-specific assignment of resonances is still the most time-consuming procedure that is necessary as the first step in high-resolution NMR studies of proteins. In many cases a reliable three-dimensional (3D) structure of the protein is available, for example, from X-ray spectroscopy or homology modeling. Here we introduce the st2nmr program that uses the 3D structure and Nuclear Overhauser Effect spectroscopy (NOESY) peak list(s) to evaluate and optimize trial sequence-specific assignments of spin systems derived from correlation spectra to residues of the protein. A distance-dependent target function that scores trial assignments based on the presence of expected NOESY crosspeaks is optimized in a Monte Carlo fashion. The performance of the program st2nmr is tested on real NMR data of an alpha-helical (cytochrome c) and beta-sheet (lipocalin) protein using homology models and/or X-ray structures;it succeeded in completely reproducing the correct sequence-specific assignments in most cases using 2D and/or N-15/C-13 Nuclear Overhauser Effect (NOE) data. Additionally to amino acid residues the program can also handle ligands that are bound to the protein, such as heme, and can be used as a complementary tool to fully automated assignment procedures.(C) 2002 John Wiley Sons, Inc.

关键词： automatic NMR assignment sequential assignment protein structure computer program homology modeling

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ANALYSIS AND OPTIMAL-DESIGN OF MICROSTRIP SENSORS

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IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION 1988年第3期135卷 187-195页

作者： KHALID, KB MACLEAN, TSM RAZAZ, M WEBB, PW UNIV BIRMINGHAM DEPT ELECTR & ELECT ENGNBIRMINGHAM B15 2TTW MIDLANDSENGLAND

The analysis and optimal design of a microstrip sensor for measuring the water content of rubber latex is described. The microstrip structure consists of three layers: substrate, protective layer and semi-infinite layer of wet medium. A functional relationship has been developed between the attenuation and the water content of the latex, and close agreement has been found between the computed and experimental results. A computer program has also been developed which optimises the sensitivity for a given water content.

关键词： rubber latex Waveguide and microwave transmission line components microwave aquametry Other nonelectric variables measurement electric sensing devices attenuation sensitivity microstrip sensors computer program Microwave measurement techniques water content Sensing devices and transducers strip line components optimal design rubber moisture measurement microwave measurement

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ANALYSIS OF ELECTROMAGNETIC-FIELD DISTRIBUTION IN TUNNELS BY THE BOUNDARY-ELEMENT METHOD

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IEE PROCEEDINGS-H MICROWAVES ANTENNAS AND PROPAGATION 1990年第4期137卷 202-208页

作者： SAKAI, K KOSHIBA, M HOKKAIDO UNIV DEPT ELECTR ENGNSAPPOROHOKKAIDO 060JAPAN

An efficient numerical approach, based on the boundary element method, for the analysis of electromagnetic field distributions in twodimensional tunnels with discontinuities such as L-bends, T-junctions, and cross-junctions is described. The side walls of the tunnels are assumed to be lossy dielectric and the surface impedance approximation is used to determine the boundary condition on the side walls. A computer program has been developed for tunnels excited by a line current or a TE dominant mode. A comparison of the numerical results with the experimental results using microwave simulation shows a good agreement except in the vicinity of the inner wall of the output tunnel perpendicular to the excited tunnel.

关键词： Waveguide and cavity theory waveguide theory line current electromagnetic fields lossy dielectric Radiowave propagation electromagnetic field distribution numerical approach microwave simulation surface impedance approximation radiowave propagation cross-junctions waveguide TE dominant mode computer program boundary-elements methods side walls discontinuities boundary-element method Other numerical methods L-bends T-junctions two-dimensional tunnels

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Efficient exponential regression with exact fiducial limits to fit cardiac pressure data

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computer METHODS AND programS IN BIOMEDICINE 1997年第1期53卷 57-64页

作者： Langer, SFJ Institute of Physiology Free University Berlin Arnimallee 22 D-14195 Berlin Germany

Many observations in the biological field can adequately be fitted to an exponential regression equation, commonly in the form y = alpha + beta e(gamma x). However, the exact confidential limits of the parameters remain a problem. An algorithm to solve this problem is proposed here and tested with experimental data obtained from ventricular pressure measurements in isolated working small animal hearts. A subroutine based on this algorithm is written in Borland's Turbo-Pascal but easily portable to other languages. (C) 1997 Elsevier Science Ireland Ltd.

关键词： regression analysis non-linear regression curve-fitting algorithms computer program myocardial contraction

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Three-dimensional strain analysis using Mathematica

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JOURNAL OF STRUCTURAL GEOLOGY 2011年第10期33卷 1467-1476页

作者： Mookerjee, Matty Nickleach, Scott Sonoma State Univ Dept Geol Rohnert Pk CA 94928 USA Sonoma State Univ Dept Math & Stat Rohnert Pk CA 94928 USA

A suite of geological computer programs written in Mathematica is currently available both within the online repository for the Journal of Structural Geology as well as on the first author's website (http://***/users/m/mookerje/***). The majority of these programs focus on three-dimensional strain analysis (e.g., determining best-fit strain ellipsoids, plotting elliptical data on either a Flinn or Hsu diagram, and determining error bounds for three-dimensional strain data). This program suite also includes a ternary diagram plotting program, a rose diagram program, an equal area and equal angle projections program, and an instructional program for creating two-dimensional strain path animations. The bulk of this paper focuses on a new method for determining a best-fit ellipsoid from arbitrarily oriented sectional ellipses and methods for determining appropriate error bounds for strain parameters and orientation data. This best-fit ellipsoid method utilizes a least-squares approach and minimizes the error associated with the two-dimensional data-ellipse matrix elements with the corresponding matrix elements from sectional ellipses through a general ellipsoid. Furthermore, a kernel density estimator is utilized to yield reliable error margins for the strain parameters, octahedral shear strain. Flinn's k-value, and Lode's ratio. By assuming a gamma distribution for the simulated principal axes orientations, more realistic error bounds can be estimated for these axes orientations. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Strain analysis Best-fit ellipsoid Mathematica Statistics Error margins computer program

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LIPOPROTEIN SIZE DISTRIBUTIONS FROM THE ANALYTICAL ULTRA-CENTRIFUGATION OF SERUM AND LIPOPROTEIN SAMPLES

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MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING 1980年第6期18卷 772-778页

作者： BOSANQUET, AG BICKERSTAFFE, R VINEY, IT FRASER, R CHRISTCHURCH CLIN SCH MED DEPT PATHOLCHRISTCHURCHNEW ZEALAND UNIV CANTERBURY LINCOLN COLL DEPT BIOCHEMCHRISTCHURCHNEW ZEALAND

A FORTRAN computer program is presented for the reduction to a lipoprotein size distribution of data from the analytical ultracentrifugal analysis of total low density lipoproteins at a density of 1·0.63 g/ml. It is a simple but versatile program using schlieren photographs reduced to x and y co-ordinates as the input. The program accommodates different rotor speeds, temperatures and background solution viscosities, and will accept up to five photographs taken at any time before or after the rotor has reached full speed. Output consists of a lipoprotein diameter distribution and a graph with log (Sf+5) as x-axis. Lipoprotein concentrations are also calculated.

关键词： computer program Lipoprotein spectrum Low density lipoproteins Very low density lipoproteins

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Wallace's approach to unsupervised learning: The Snob program

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computer JOURNAL 2008年第5期51卷 571-578页

作者： Jorgensen, Murray A. McLachlan, Geoffrey J. Univ Waikato Dept Stat Hamilton New Zealand Univ Queensland Dept Math Brisbane Qld 4072 Australia

We describe the Snob program for unsupervised learning as it has evolved from its beginning in the 1960s until its present form. Snob uses the minimum message length principle expounded in Wallace and Freeman (Wallace, C.S. and Freeman, P.R. (1987) Estimation and inference by Compact coding. J. Roy. Statist. Soc. Ser. B, 49, 240-252.) and we indicate how Snob estimates class parameters using the approach of that paper. We will survey the evolution of Snob from these beginnings to the state that it has reached as described by Wallace and Dowe (Wallace, C.S. and Dowe, D.L. (2000) MMM mixture modelling of multi-state, Poisson, Von Mises Circular and Gaussian distributions. Stat. Comput., 10, 73-83.) We pay particular attention to the revision of Snob in the 1980s where definite assignment of things to classes was abandoned.

关键词： computer program EM algorithm minimum message length mixture model cluster analysis

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ECOP: an economic model to assess the willow short rotation coppice global profitability in a case of small scale gasification pathway in Belgium

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ENVIRONMENTAL MODELLING & SOFTWARE 2000年第3期15卷 279-292页

作者： Goor, F Jossart, JM Ledent, JF Catholic Univ Louvain Fac Sci Agron ECOP Lab Ecol Grandes Cultures B-1348 Louvain Belgium

This paper presents a software package developed to assess the economic profitability of an original way to produce renewable energy: the small scale gasification of willow cultivated as short rotation coppice (SRC) in Belgium. The theoretical bases of the model (process hypotheses and economic indicators) are firstly presented together with the most relevant characteristics of the energy production route (SRC management and wood production, storage and conversion). A reference case is then defined which combines the most influencing parameters (reference interest rate, rotation length, subsidies, harvest mode, SRC yield, power of the electricity generator and annual production of electricity). A sensitivity analysis on these parameters highlighted that the project profitability, from the net present value point of view, is very sensitive to the reference interest rate, to the subsidies (of the conversion unit but probably also of any other kind of subsidies), to the SRC yield and to the generator power, all other parameters remaining constant. The rotation length has only a low influence, at least in the range of classic values (3 to 7 years). To harvest the wood in stems (with delayed chipping) seems also to be the most interesting option. (C) 2000 Elsevier Science Ltd. All rights reserved.

关键词： Belgium computer program Renewable energy Short rotation coppice (SRC) Small scale gasification pathway Willow

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