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- To provide the most
comprehensive JavaTM library for the scientific
community.
- To create synergy between all
sciences (e.g. math, physics, sociology, biology, astronomy,
economics, etc.) by integrating them into a single architecture.
- To provide the best on-line
services (webstart) for scientific calculations and
visualizations.
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- Reference Implementation (RI) for JSR-275:
javax.measure.*
(Latest Draft Specification).
- A
coordinates module compliant with
OGC/ISO
specifications for the development and deployment of geographic applications.
- A rigourous mapping of mathematical
structures
(e.g. Group, Ring, Field, VectorSpace ) to Java interfaces.
- A
linear algebra module, which includes a first (and I believe unique)
parameterized matrix
class capable of resolving linear system of equations involving
any kind of elements (e.g. Complex, ModuloInteger, RationalFunctions)
- A functions
module for symbolic calculations and analysis.
- Different types of numbers
such as real
numbers of arbitrary and guaranteed precision, or the always
exact rational
numbers.
- Support for exact or arbitrary precision
measurements
(also strongly typed).
- Support for Standard , Relativistic ,
High-Energy , Quantum and Natural physical
models.
- A monetary module
for precision-guaranteed calculations and currencies conversions.
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JScience version 4.3.1 - October 4, 2007 |
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A JRE 1.4 compatible binary is
also available here (Version 3.2.0)
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Tutorial and Code Examples
JScience is for:
- Low-Level Concurrency:
To take advantage of multi-core processors automatically.
Our benchmark indicates that on a dual-processors
our
Matrix<Float64> or Matrix<Complex> multiplications
are the fastest around (for a pure Java library).
- Stack allocation:
To reduce garbage collection, decrease memory footprint and increase scalability.
- Real-Time Behavior and Compliance:
JScience can safely be used with
RTSJ VMs without resulting into memory clashes or illegal access exceptions.
- Persistency/Networking:
Fastest XML marshalling/unmarshalling around!
- Easy and type-safe configuration management with the Configurable class
JScience binary includes the latest Javolution classes for the J2SE 1.5+ platform. |
JScience core library (jscience.jar)
) is self-executable for versioning, testing and benchmark purpose.
java -jar jscience.jar version (shows version
information)
java -jar jscience.jar test (performs self-tests)
java -jar jscience.jar perf (runs benchmark)
Note: Configuration
parameters are loaded from system properties at start-up (e.g.
-Djavolution.context.ConcurrentContext#MAXIMUM_CONCURRENCY=0
would disable concurrency).
Here are the benchmark results
on a Dual-Core CPU (T2050) @ 1.60 GHz running Windows XP.
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JScience core modules are
free; permission to use, copy,
modify, and distribute these modules is freely granted, provided
that copyright notices are preserved. Optional modules (none
currently) may be covered by different licencing agreements. |
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Additional core modules for 2007:
- org.jscience.mathematics.transforms (FFT)
- org.jscience.physics.nuclear
- org.jscience.mathematics.integration
- org.jscience.computing.geneticAlgorithms
- org.jscience.cognitive.neural-networks
- org.jscience.statistics.randomizers
- org.jscience.astronomy.ephemeris
- org.jscience.history.calendars
- org.jscience.chemistry.elements
- org.jscience.biology.molecules
- and more...
Feel free to let us know if you are interested in developping
new modules. There are very few rules:
- Document well
- Integrate with others modules (e.g. physical measures,
mathematics numbers, functions etc..)
- Respect module ownership (changes to others packages than
yours must be approved).
- Conform to our Coding Standard Addendum
To participate: First register as "Observer" to
http://jscience.dev.java.net , then send an e-mail with your
proposal to dev@jscience.dev.java.net
upon acceptance you are granted a "Developer" role. You might
also want to subscribe to the DEV mailing list in order to comment
on others proposals (even if you are not a developer). |
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- October 3, 2007: JScience 4.3
JavaWorld Article: Introduction to JSR-275: Measures and Units
- Added DecimalMeasure [4.3.0]
- Added VectorMeasure [4.3.0]
- Fixed issues:
61 [4.3.1],
32,
33,
34,
38,
39,
41,
55,
58,
[4.3.0]
- August 27, 2007: JScience 4.2
JSR-275 Draft Review Actions:
- Add conversion method to Measure class:
Measure.to(Unit<Q> unit)
- Add Measure factory method for
double[] and BigDecimal
- Add
SystemOfUnits class.
- Rename
Unit.getSystemUnit() to Unit.getStandardUnit()
- Provide convenience method
Unit.alternate(String)
- Add
MeasureFormat (with direct support for CompoundUnit)
- Provide
UnitFormat.getInstance() and UnitFormat.getUCUMInstance()
- Unit converters A and B are equals if
A.concatenate(B.inverse()) is identity.
- Unit.asType(Class) raises a ClassCastException when dimensions mismatch.
- June 12, 2007: JScience 4.1
Fixed Issue 52 (matrix multiplication) [4.1.2]
Upgraded to the latest Javolution V5.1 [4.1.1]
Added FloatingPoint numbers of fixed arbitrary precision
Reference implementation for the JSR-275 : Measures and Units
Refactored package/classes to use singular form, org.jscience.physics.measure.Measure
renamed org.jscience.physics.amount.Amount (to avoid name clash with javax.measure ).
Support for dense or sparse vectors.
Our benchmark indicates that on
dual-core processors our Matrix<Float64> or Matrix<Complex> multiplications
are the fastest around (for a pure Java library), by about 2x!
- October 5, 2006: JScience 3.2
JSR-275 new packaging (javax.measure.*)
Binary for 1.4 (created using Retroweaver)
- July 15, 2006 : JScience 3.1.6
Updated/corrected physical constants
(CODATA 2002) [3.1.3]
Added RationalConverter for exact unit conversion [3.1.0]
Automatic removal of terms with zero coefficients for polynomials [3.1.0]
Fixed defects 27, 28, 29 (java.net issues database) [3.1.0]
- March 2, 2006 : JScience 3.0
Major upgrade of the library to leverage JDK 1.5 class paramaterization capabilities.
Rigourous mapping of mathematical structures (e.g. Group, Ring, Field, etc.)
Fixed defects 17, 19, 20, 21, 25 (java.net) [3.0.2]
Added new quantities for flow rate and viscosity [3.0.1]
- October 11, 2005 : JScience 2.0
Javolution classes included into the JScience binary (.jar)
- January 26, 2005: JScience 1.0
Upgrade to Javolution 2.2 [1.0.3]
Upgrade to Javolution 2.0 [1.0.2]
Upgrade to Javolution 1.1 [1.0.1]
Spin-off of Java(TM) Addition to Default Environment [1.0.0]
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