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RELEASE_NOTES
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RELEASE_NOTES
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===============================================================================
CARLSIM RELEASE NOTES
===============================================================================
-------------------------------------------------------------------------------
CARLsim 4.1
-------------------------------------------------------------------------------
- Bugfixes for Save and Load
- Bugfixes for NeuronMonitor
- Updates in user guide
- Support for CUDA 10
-------------------------------------------------------------------------------
CARLsim 4.0
-------------------------------------------------------------------------------
Highlights:
Multi-GPU support
Hybrid CPU/GPU mode
Multi-compartment and LIF point neurons
-------------------------------------------------------------------------------
CARLsim 3.1
-------------------------------------------------------------------------------
tbd
-------------------------------------------------------------------------------
CARLsim 3.0
-------------------------------------------------------------------------------
Highlights:
New user interface.
Platform compatibility (Linux, Windows, and Mac OS X).
Shared library build. CUDA6 support.
E-STDP, I-STDP, DA-STDP.
Plugin for Evolutionary Computations in Java (ECJ).
Improved SpikeMonitor, ConnectionMonitor, and GroupMonitor.
3D Topography.
Current injection.
On-line weight tuning.
MATLAB Offline Analysis Toolbox.
MATLAB Visual Stimulus Toolbox.
Regression suite.
User Guide and Tutorial.
Bugfixes.
Description:
tbd
Publication:
tbd
Tested platforms and devices:
* Platforms:
- Linux: Ubuntu 10.04, 12.04, 12.10, 13.04, 13.10, 14.04, Arch Linux,
CentOS 6, OpenSUSE 13.1
- Windows: 7
- Mac OS: X
* NVIDIA Toolkits: CUDA 5.0, 5.5, 6.0, 6.5
* CUDA compute capabilities: 2.0, 2.1, 3.0, 3.5
* CUDA devices: Tesla C1060, Tesla M2090, GTX 460, GTX 780, Quadro 600,
NVS 4200M, TITAN Z
* Doxygen: 1.8
Known bugs & issues:
* Currently, short-term plasticity (STP) can only be run in GPU mode if
there are no synaptic delays greater than 1 ms. This is to prevent a
known issue in kernel_globalConductanceUpdate, which will be fixed as
soon as possible in a future release.
* Mistakingly calling CARLsim::setSTDP on a fixed connection will result
in an unspecified launch failure in GPU mode.
-------------------------------------------------------------------------------
CARLsim 2.2
-------------------------------------------------------------------------------
Highlights:
Included model for homeostatic synaptic scaling.
Included support for parameter tuning interface (PTI) library, which
enables the automated parameter tuning of SNNs using evolutionary
algorithms.
Added CUDA5 support.
Description:
As the desire for biologically realistic spiking neural networks (SNNs)
increases, tuning the enormous number of open parameters in these
models becomes a difficult challenge. SNNs have been used to
successfully model complex neural circuits that explore various neural
phenomena such as neural plasticity, vision systems, auditory systems,
neural oscillations, and many other important topics of neural
function. Additionally, SNNs are particularly well-adapted to run on
neuromorphic hardware that will support biological brain-scale
architectures. Although the inclusion of realistic plasticity
equations, neural dynamics, and recurrent topologies has increased the
descriptive power of SNNs, it has also made the task of tuning these
biologically realistic SNNs difficult. To meet this challenge, we
present an automated parameter tuning framework capable of tuning SNNs
quickly and efficiently using evolutionary algorithms (EA) and
inexpensive, readily accessible graphics processing units (GPUs). A
sample SNN with 4104 neurons was tuned to give V1 simple cell-like
tuning curve responses and produce self-organizing receptive fields
(SORFs) when presented with a random sequence of counterphase
sinusoidal grating stimuli. A performance analysis comparing the
GPU-accelerated implementation to a single-threaded central
processing unit (CPU) implementation was carried out and showed a
speedup of 65× of the GPU implementation over the CPU implementation,
or 0.35 h per generation for GPU vs. 23.5 h per generation for CPU.
Additionally, the parameter value solutions found in the tuned SNN
were studied and found to be stable and repeatable. The automated
parameter tuning framework presented here will be of use to both the
computational neuroscience and neuromorphic engineering communities,
making the process of constructing and tuning large-scale SNNs much
quicker and easier.
Publications:
Parameter tuning interface:
Carlson KD, Nageswaran JM, Dutt N and Krichmar JL (2014) An efficient
automated parameter tuning framework for spiking neural networks.
Front. Neurosci. 8:10. doi: 10.3389/fnins.2014.00010
Homeostatic synaptic scaling model:
Carlson, K. D., Richert, M., Dutt, N., and Krichmar, J. L. (2013).
“Biologically plausible models of homeostasis and STDP: stability and
learning in spiking neural networks,” in Proceedings of the 2013
International Joint Conference on Neural Networks (IJCNN) (Dallas, TX).
doi: 10.1109/IJCNN.2013.6706961
-------------------------------------------------------------------------------
CARLsim 2.1
-------------------------------------------------------------------------------
Highlights:
Introduced "CARLsim" branding.
Efficient SNN model of pattern motion selectivity in visual cortex
(V1, MT, LIP). Improved GPU memory management. Bugfixes.
Description:
We present a two-stage model of visual area MT that we believe to be
the first large-scale spiking network to demonstrate pattern direction
selectivity. In this model, componentdirection-selective (CDS) cells in
MT linearly combine inputs from V1 cells that have spatiotemporal
receptive fields according to the motion energy model of Simoncelli
and Heeger. Pattern-direction-selective (PDS) cells in MT are
constructed by pooling over MT CDS cells with a wide range of preferred
directions. Responses of our model neurons are comparable to
electrophysiological results for grating and plaid stimuli as well as
speed tuning. The behavioral response of the network in a motion
discrimination task is in agreement with psychophysical data. Moreover,
our implementation outperforms a previous implementation of the motion
energy model by orders of magnitude in terms of computational speed and
memory usage. The full network, which comprises 153,216 neurons and
approximately 40 million synapses, processes 20 frames per second of a
32×32 input video in real-time using a single off-the-shelf GPU. To
promote the use of this algorithm among neuroscientists and computer
vision researchers, the source code for the simulator, the network,
and analysis scripts are publicly available.
Publication:
M Beyeler, M Richert, ND Dutt, JL Krichmar (2014). "Efficient spiking
neural network model of pattern motion selectivity in visual cortex",
Neuroinformatics.
-------------------------------------------------------------------------------
CARLsim 2.0
-------------------------------------------------------------------------------
Highlights:
Added COBA mode, STDP, and STP. Cortical model of color selectivity
(color opponency). Cortical model of motion selectivity (V1, MT) and
orientation selectivity (V1, V4).
Description:
We have developed a spiking neural network simulator, which is both
easy to use and computationally efficient, for the generation of
large-scale computational neuroscience models. The simulator implements
current or conductance based Izhikevich neuron networks, having
spike-timing dependent plasticity and short-term plasticity. It uses a
standard network construction interface. The simulator allows for
execution on either GPUs or CPUs. The simulator, which is written in
C/C++, allows for both fine grain and coarse grain specificity of a
host of parameters. We demonstrate the ease of use and computational
efficiency of this model by implementing a large-scale model of \
cortical areas V1, V4, and area MT. The complete model, which has
138,240 neurons and approximately 30 million synapses, runs in
real-time on an off-the-shelf GPU. The simulator source code, as well
as the source code for the cortical model examples is publicly
available.
Publication:
M Richert, JM Nageswaran, N Dutt, JL Krichmar (2011). "An efficient
simulation environment for modeling large-scale cortical processing",
Frontiers in Neuroinformatics 5(19):1-15.
-------------------------------------------------------------------------------
CARLsim 1.0
-------------------------------------------------------------------------------
Highlights:
Initial release. CUBA mode. Demonstration of GPU speedup.
Description:
We demonstrate an efficient, biologically realistic, large-scale SNN
simulator that runs on a single GPU. The SNN model includes Izhikevich
spiking neurons, detailed models of synaptic plasticity and variable
axonal delay. We allow user-defined configuration of the GPU-SNN model
by means of a high-level programming interface written in C++ but
similar to the PyNN programming interface specification. The GPU
implementation (on NVIDIA GTX-280 with 1 GB of memory) is up to 26
times faster than a CPU version for the simulation of 100K neurons with
50 Million synaptic connections, firing at an average rate of 7 Hz.
For simulation of 10 Million synaptic connections and 100K neurons, the
GPU SNN model is only 1.5 times slower than real-time. Further, we
present a collection of new techniques related to parallelism
extraction, mapping of irregular communication, and network
representation for effective simulation of SNNs on GPUs. The fidelity
of the simulation results was validated on CPU simulations using firing
rate, synaptic weight distribution, and inter-spike interval analysis.
Our simulator is publicly available to the modeling community so
that researchers will have easy access to large-scale SNN simulations.
Publication:
JM Nageswaran, N Dutt, JL Krichmar, A Nicolau, AV Veidenbaum (2009).
"A configurable simulation environment for the efficient simulation of
large-scale spiking neural networks on graphics processors",
Neural Networks 22:791-800.