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Qrtzgeotherm: An ActiveX component for the quartz solubility geothermometer

computerS & GEOSCIENCES 2008年第12期34卷 1918-1925页

作者： Verma, Mahendra P. Inst Invest Elect Cuernavaca 62490 Morelos Mexico

An ActiveX component, QrtzGeotherm, to calculate temperature and vapor fraction in a geothermal reservoir using quartz Solubility geothermometry was written in Visual Basic 6.0. Four quartz solubility equations along the liquid-vapor saturation curve: (i) a quadratic equation of 1/T and pressure, (ii) a linear equation relating logSiO(2) to the inverse of absolute temperature (T), (iii) a polynomial of T including logarithmic terms and (iv) temperature as a polynomial of SiO(2) including logarithmic terms are programmed. The QrtzGeotherm has input parameters: (j) HRes-the reservoir enthalpy (kj/kg), (ii) SiO2TD-silica concentration in total discharge (ppm), (iii) GeoEq-number of quartz solubility equation and (iv) TempGuess-a guess value of the reservoir temperature (degrees C). The reservoir enthalpy H(res) is assumed to be the same as the total discharge enthalpy H(R). The output parameters are (i) TempRes-reservoir temperature (degrees C) and (ii) VapRes-reservoir vapor fraction. The first step is to calculate the total discharge concentration of silica SiO2TD from the concentration of silica SiO2Col of separated water, sampled after N-separations of vapor and water. To use QrtzGeotherm in MS-Excel, three functions SiO2TD, GeoResTemp and GeoResVap for an N-stage separation of geothermal reservoir fluid are written in Visual Basic for Application (VBA). Similarly, a demonstration program, QrtzGeothrm, is written in Visual Basic 6.0. (C) 2008 Elsevier Ltd. All rights reserved.

关键词： Quartz geothermometry Solubility equations ActiveX component computer program QrtzGeotherm QrtzGeothrm Visual Basic 6.0

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A computerIZED CANCER REGISTRY DATA AND VALIDATION SYSTEM IN INDIA - ITS IMPLICATIONS FOR DEVELOPING-COUNTRIES

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computer METHODS AND programS IN BIOMEDICINE 1994年第2期44卷 109-117页

作者： KRISHNAMURTHY, S STEWART, C KRISHNAN, V INDIAN COUNCIL MED RES NATL CANC REGISTRY PROGRAMMEBOMBAYINDIA

The cancer registration system in India, and an appropriate computer program to validate the cancer patient data it generates, are described, with the resource inputs, and outputs of research, training, awareness creation and cancer control, in the context of local health care systems. computer packages already available mostly address the type of data obtainable from western health care systems. The same factors that limit health care systems in India, and probably most other developing countries - inadequate health care facilities, skeletal medical records systems, meagre and unavailable vital statistics, few trained staff, funding and computer facilities - also limit the data sent to the National Cancer Registry programme, The computer program we developed checks for the reliability and validity of various cancer diagnostic, spread, therapeutic and outcome variables. The program is in HIBASIC for a CPM operating system with a minimum of 64 kB memory, adaptable to MS-DOS systems, population-based cancer registry data, and perhaps to other types of chronic disease registries, with relevant modifications. Since reliable cancer registry data are needed for effective cancer control measures, this program may help in such efforts in developing countries.

关键词： CANCER REGISTRY DATA VALIDATION computer program DEVELOPING COUNTRIES HOSPITAL RECORDS CANCER STATISTICS CANCER CONTROL

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A model for evaluating the fire resistance of contour-protected steel columns

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STRUCTURAL ENGINEERING AND MECHANICS 2001年第5期12卷 559-572页

作者： Kodur, VKR Ghani, BA Sultan, MA Lie, TT El-Shayeb, M CNR Inst Res Construct Ottawa ON Canada Univ Technol Malaysia Dept Mech Engn Skudai Johor Malaysia

A numerical model, in the form of a computer program, for evaluating the fire resistance of insulated wide-flange steel columns is presented. The three stages associated with the thermal and structural analysis in the calculation of fire resistance of columns is explained. The use of the computer program for tracing the response of an insulated steel column from the initial pre-loading stage to collapse, due to fire, is demonstrated. The validity of the numerical model used in the program is established by comparing the predictions from the computer program with results from full-scale fire tests. Details of fire tests carried out on wide-flange steel columns protected with ceramic fibre insulation, together with results, are presented. The computer program can be used to evaluate the fire resistance of protected wide-flange steel columns for any value of the significant parameters, such as load, section dimensions, column length, type of insulation, and thickness of insulation without the necessity of testing.

关键词： fire resistance computer program high temperature wide flange steel columns insulated columns contour protection

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Internet programs for drawing moth pheromone analogs and searching literature database

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JOURNAL OF CHEMICAL ECOLOGY 2002年第4期28卷 807-817页

作者： Byers, JA Swedish Univ Agr Sci Dept Crop Sci SE-23053 Alnarp Sweden

An Internet web page is described for organizing and analyzing information about lepidopteran sex pheromone components. Hypertext markup language(HTML) with JavaScript program code is used to draw moth pheromone analogs by combining GIF bitmap images for viewing by web browsers such as Netscape or Microsoft Internet Explorer. Straight-chain hydrocarbons of 5-22 carbons with epoxides or unsaturated positions of E or Z geometrical configuration with several alternative functional groups can be drawn by simply checking menu bars or checkboxes representing chain length, E/Z unsaturation points, epoxide position and chirality, and optional functional groups. The functional group can be an aldehyde, alcohol, or ester of formate, acetate, propionate, or butyrate. The program is capable of drawing several million structures and naming them [e.g., (E,E)-8,10-dodecadien-1-ol and abbreviated as E8E10-12:OH]. A Java applet program run from the same page searches for the presently drawn structure in an internal database compiled from the Pherolist, and if the component is found, provides a textarea display of the families and species using the component. Links are automatically specified for drawn components if found in the Pherolist web site (maintained by H. Arn). Windowed links can also be made to two other JavaScript programs that allow searches of a web site database with over 5900 research citations on lepidopteran semiochemicals and a calculator of vapor pressures of some moth sex pheromone analogs at a specified temperature. Various evolutionary and biosynthetic aspects are discussed in regard to the diversity of moth sex pheromone components.

关键词： Lepidoptera moth pheromone components epoxides aldehydes alcohols acetate esters Internet JavaScript computer program Java applet database vapor pressures

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TRAVEL TIME CURVES FOR COMPLEX INHOMOGENEOUS SLIGHTLY ANISOTROPIC MEDIA

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STUDIA GEOPHYSICA ET GEODAETICA 1984年第4期28卷 393-406页

作者： FIRBAS, P Geofyzika n. p. Brno

The linearization approach is used to compute the travel times in inhomogeneous slightly anisotropic media. The basic formulae are outlined and their accuracy demonstrated in comparison with the exact solution based on the zero-order ray theory and the Backus formula (1965). The linearization is extended also to complex media with curved interfaces. The computer program for calculating travel times in 2D, inhomogeneous, slightly anisotropic, complex media is briefly described. The numerical results obtained for a realistic situation and various types of waves are presented to enable the effects of anisotropy and the effects of inhomogeneity on the resulting travel times to be compared.

关键词： Anisotropy Exact Solution Travel Time computer program Structural Geology

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The discrete-dipole-approximation code ADDA: Capabilities and known limitations

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JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER 2011年第13期112卷 2234-2247页

作者： Yurkin, Maxim A. Hoekstra, Alfons G. Inst Chem Kinet & Combust SB RAS Novosibirsk 630090 Russia Novosibirsk State Univ Novosibirsk 630090 Russia Univ Amsterdam Fac Sci Computat Sci Res Grp NL-1098 XH Amsterdam Netherlands

The open-source code ADDA is described, which implements the discrete dipole approximation (DDA), a method to simulate light scattering by finite 3D objects of arbitrary shape and composition. Besides standard sequential execution, ADDA can run on a multiprocessor distributed-memory system, parallelizing a single DDA calculation. Hence the size parameter of the scatterer is in principle limited only by total available memory and computational speed. ADDA is written in C99 and is highly portable. It provides full control over the scattering geometry (particle morphology and orientation, and incident beam) and allows one to calculate a wide variety of integral and angle-resolved scattering quantities (cross sections, the Mueller matrix, etc.). Moreover, ADDA incorporates a range of state-of-the-art DDA improvements, aimed at increasing the accuracy and computational speed of the method. We discuss both physical and computational aspects of the DDA simulations and provide a practical introduction into performing such simulations with the ADDA code. We also present several simulation results, in particular, for a sphere with size parameter 320 (100-wavelength diameter) and refractive index 1.05. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Discrete dipole approximation Light scattering simulation computer program Very large particles

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ANALYSIS AND EVALUATION OF PERFORATING AND PERFORATION CLEANUP METHODS

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JOURNAL OF PETROLEUM TECHNOLOGY 1985年第3期37卷 505-510页

作者： BONOMO, JM YOUNG, WS (Amoco Production Co.) (Amoco Production Co.)

Analysis and Evaluation of Perforating and Perforation Perforating and Perforation Cleanup Methods Fifty-two completions made in the Gulf of Mexico between June 1978 and May 1982 have been analyzed to evaluate three commonly used techniques for perforating and cleaning up perforations before gravel packing. Since detailed flowing bottomhole pressure (BHP) information was not available in all cases, a method was developed to evaluate the completion efficiencies by using an inhouse computer program. This program models well performance by simultaneously solving the equations performance by simultaneously solving the equations governing fluid flow in the reservoir, the near-wellbore region, the gravel-packed perforation tunnels. and up the production tubing. The results showed that perforating production tubing. The results showed that perforating underbalanced with a tubing-conveyed casing gun yielded more efficient completions than the other two techniques. Introduction With the advent of different perforating and perforation cleanup techniques and procedures, more options are available to the production engineer when designing gravel-packed completions. The three most common techniques currently used are (1) with a casing gun on electric line and surging the perforations, (2) with a casing gun on electric line and washing the perforations, and (3) underbalanced with a tubing-conveyed casing gun. The first two techniques require perforating with the pressure differential into the formation, whereas the last technique allows the pressure differential to be into the wellbore. Recent work by Bell indicates that reverse pressure (underbalanced) perforating yields more productive perforations than do positive pressure (overbalanced) perforations than do positive pressure (overbalanced) techniques. To evaluate the three techniques, gravel-packed wells completed with each of these methods during 1978-82 were considered. All the wells in the data base were completed followin

关键词： perforation tunnel equation perf-surge technique electric line computer program flowing bhp perforation cleanup method perforation completion efficiency gravel pack Completion Installation and Operations Formation Evaluation & Management Perforating Completion Operations

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GEMOX: A simple and efficient strategy for the generation of polymer molecular models compatible with X-ray diffraction data

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POLYMER 1996年第13期37卷 2589-2595页

作者： Navas, JJ Aleman, C MunozGuerra, S UNIV POLITECN CATALUNYA ETS ENGN IND BARCELONA DEPT ENGN QUIM E-08028 BARCELONA SPAIN

A computational method based on a corrected grid search algorithm has been developed to help in the conformational analysis of crystalline polymers by X-ray diffraction. The program was designed upon the difficulty of taking into account all the molecular arrangements that are initially compatible with the experimental diffraction data of polymers, in particular when these consist of chemical repeating units with a wide accessible conformational space. The strategy presented here has been incorporated into a computer program named GEMOX. First, all the models fitting the experimentally determined axial repeat of the chain and having the helical symmetry known for the polymer are rapidly created by computing their atomic coordinates. Secondly, sterically hindered conformations are discarded using force-field energy criteria. For this, a potential energy function containing both non-bonded and torsional terms has been incorporated in the program. The ability of the method to provide a complete survey of the reasonable models for a given system was tested for three well characterized polymers, all of them displaying a complex conformational behaviour. Copyright (C) 1996 Elsevier Science Ltd.

关键词： computer program molecular models X-ray diffraction

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FDFLOW - A FORTRAN-77 SOLVER FOR 2-D INCOMPRESSIBLE FLUID-FLOW

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computerS & GEOSCIENCES 1994年第3期20卷 265-291页

作者： LEMOS, CM Department of Coastal and Estuarine Dynamics Instituto Hidrografico R. das Trinas 49 1296 Lisbon-Codex Portugal

In this work, a FORTRAN-77 program for solving two-dimensional (2-D) incompressible flows is presented. The algorithm is based on finite difference approximations of the momentum and continuity equations, and consists of two stages. In the first stage, a temporary field is obtained using conservative approximations of the momentum equations, either implicit or explicit, with the old pressure gradient. In the second stage, the advanced-time velocity and pressure are obtained using an iterative method, in such a way that the incompressibility constraint is satisfied. The program was written in a modular form, and can be used to obtain accurate solutions to some difficult fluid-flow problems with small PCs. This capability was tested by its application to lid-driven cavity flow and flow past a backward-facing step, with Reynolds number up to 10,000. The model described herein might be useful for both educational and professional purposes. Because of its simple design, the program can be taken as a starting point to test other numerical schemes, or to treat more advanced problems than those considered in this work, such as thermally coupled flow, free-surface flow, and 3-D flow.

关键词： NAVIER-STOKES EQUATIONS FINITE DIFFERENCES computer program PERSONAL computerS

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Modified T-Z model - a software for tension piles

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computerS & STRUCTURES 1998年第6期68卷 613-625页

作者： Reddy, ESB O'Reilly, M Chapman, DN JNT Univ Coll Engn Dept Civil Engn Hyderabad 500072 Andhra Pradesh India Univ Sheffield Dept Civil & Struct Engn Sheffield S Yorkshire England Univ Nottingham Dept Civil Engn Nottingham NG7 2RD England

Pile foundation is one of the common type of foundation used to support structures resting in weak soils and in an offshore environment. Piles are generally subjected to compressive (downward) loads. Hence, the majority of studies on piles are directed towards their behaviour under compressive loads. With the development of tension leg platform (TLP) technology for developing deep offshore oil and gas fields, there is a growing interest in understanding TLP pile foundation. The piles used for TLP foundation are subjected to static pull-out force superimposed by a cyclic tensile force. The review of literature shows that the T-Z method proposed by Sulaiman and Coyle is being used commonly to estimate the load-displacement behaviour of tension piles. Although the method is simple, it suffers from few limitations. This paper critically review the model suggested by Sulaiman and Coyle and presents a modified T-Z model, are presented in the form of flow-chart and algorithm. The program developed is employed to estimate load-displacement behaviour of a set of field piles. The results are compared with the observed values and with those predicted by the Salaiman and Coyle method. It is observed that the modified T-Z model provides a better prediction to the observed values than those predicted by the model suggested by Sulaiman and Coyle. (C) 1998 Elsevier Science Ltd. All rights reserved.

关键词： computer program FORTRAN algorithm flowchart pile foundation tension piles T-Z model load-displacement shear stress distribution load-transfer mechanism

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