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Common Data Format (CDF) is a conceptual data abstraction for storing multi-dimensional data sets. The basic component of CDF is a software programming interface that is a device independent view of the CDF data model. The application developer is insulated from the actual physical file format for reasons of conceptual simplicity, device independence, and future expandability. CDF files created on any given platform can be transported to any other platform on to which CDF is ported and used with any CDF tools or layered applications. A more detailed introduction to CDF can be found in the CDF User's Guide. A comparison between CDF, netCDF, HDF and HDF5 is available at <http://cdf.gsfc.nasa.gov/html/FAQ.html>.

CDO is a collection of command line Operators to manipulate and analyse Climate model Data. Supported file formats are GRIB, netCDF, SERVICE, EXTRA and IEG. There are more than 250 operators available. The following table gives a short overview about the main categories. * File information (info, sinfo, diff, ...) * File operations (copy, cat, merge, split*, ...) * Selection (selcode, selvar, sellevel, seltimestep, ...) * Missing values (setctomiss, setmisstoc, setrtomiss) * Arithmetic (add, sub, mul, div, ...) * Mathematical functions (sqrt, exp, log, sin, cos, ...) * Comparision (eq, ne, le, lt, ge, gt, ...) * Conditions (ifthen, ifnotthen, ifthenc, ifnotthenc) * Field statistic (fldsum, fldavg, fldstd, fldmin, fldmax, ...) * Vertical statistic (vertsum, vertavg, vertstd, vertmin, ...) * Time range statistic (timavg, yearavg, monavg, dayavg, ...) * Ensemble statistic (enssum, ensavg, ensstd, ensmin, ...) * Regression (detrend) * Field interpolation (remapbil, remapcon, remapdis, ...) * Vertical interpolation (ml2pl, ml2hl) * Time interpolation (inttime, intyear)

The CFD General Notation System (CGNS) provides a standard for recording and recovering computer data associated with the numerical solution of the equations of fluid dynamics.

GRIBEX is an interface for encoding and decoding WMO FM-92 GRIB edition 1 messages and some ancillary subroutines for controlling printing and debugging. The GRIBEX software was developed at the European Centre for Medium-range Weather Forecasts (ECMWF) and is part of the EMOS library. EMOS is mostly written in Fortran. Therefore it has only a Fortran interface. CGRIBEX is a lightweight version of GRIBEX written in ANSI C with a portable Fortran interface. For best compatibility some of the C sources were converted from the Fortran GRIBEX version.

Checkmol is a command-line utility program which reads molecular structure files in different formats and analyzes the input molecule for the presence of various functional groups and structural elements. At present, approx. 200 different functional groups are recognized. This output can be easily placed into a database table, permitting the creation of chemical databases with a functional group search option. Checkmol also outputs a set of statistical values derived from a given molecule, which can also be used for quick retrieval from a database. These values include: the number of atoms, bonds, and rings, the number of differently hybridized carbon, oxgen, and nitrogen atoms, the number of C=O double bonds, the number of rings of different sizes, the number of rings containing nitrogen, oxygen, sulfur, the number of aromatic rings, the number of heterocyclic rings, etc. The combination of all of these values for a given molecule represents some kind of "fingerprint" which is useful for rapid pre-selection in a database structure/substructure search prior to a full atom-by-atom match. Matchmol complements the capabilities of checkmol. It compares two (or more) molecular structures and determines whether one of them is a substructure of the other one. This is done by a full atom-by-atom comparison of the input structures. Thus, matchmol can be used as a back-end program for structure/substructure search operations in chemical databases. The port installs both checkmol and matchmol.

The chemical-mime-data package is a collection of data files to add support for various chemical MIME types on Linux/UNIX desktops, such as KDE and GNOME.

Chemtool is a program for drawing organic molecules easily and store them as a X bitmap file (develop version).

DCL is scientific graphic library for geoscience, written in Fortran.

Chemtool is a program for drawing organic molecules easily and storing them as an X bitmap file.

CLHEP is intended to be a set of HEP-specific foundation and utility classes such as random generators, physics vectors, geometry and linear algebra.