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#ifndef _CU_RBM_H_
#define _CU_RBM_H_
#include "cuComponent.h"
#include "cumatrix.h"
#include "Matrix.h"
#include "Vector.h"
namespace TNet {
class CuRbmBase : public CuUpdatableComponent
{
public:
typedef enum {
BERNOULLI,
GAUSSIAN
} RbmUnitType;
CuRbmBase(size_t nInputs, size_t nOutputs, CuComponent *pPred) :
CuUpdatableComponent(nInputs, nOutputs, pPred)
{ }
virtual void Propagate(
const CuMatrix<BaseFloat>& visProbs,
CuMatrix<BaseFloat>& hidProbs
) = 0;
virtual void Reconstruct(
const CuMatrix<BaseFloat>& hidState,
CuMatrix<BaseFloat>& visProbs
) = 0;
virtual void RbmUpdate(
const CuMatrix<BaseFloat>& pos_vis,
const CuMatrix<BaseFloat>& pos_hid,
const CuMatrix<BaseFloat>& neg_vis,
const CuMatrix<BaseFloat>& neg_hid
) = 0;
virtual RbmUnitType VisType() = 0;
virtual RbmUnitType HidType() = 0;
};
class CuRbm : public CuRbmBase
{
public:
CuRbm(size_t nInputs, size_t nOutputs, CuComponent *pPred);
~CuRbm();
ComponentType GetType() const;
const char* GetName() const;
//CuUpdatableComponent API
void PropagateFnc(const CuMatrix<BaseFloat>& X, CuMatrix<BaseFloat>& Y);
void BackpropagateFnc(const CuMatrix<BaseFloat>& X, CuMatrix<BaseFloat>& Y);
void Update();
//RBM training API
void Propagate(const CuMatrix<BaseFloat>& visProbs, CuMatrix<BaseFloat>& hidProbs);
void Reconstruct(const CuMatrix<BaseFloat>& hidState, CuMatrix<BaseFloat>& visProbs);
void RbmUpdate(const CuMatrix<BaseFloat>& pos_vis, const CuMatrix<BaseFloat>& pos_hid, const CuMatrix<BaseFloat>& neg_vis, const CuMatrix<BaseFloat>& neg_hid);
RbmUnitType VisType()
{ return mVisType; }
RbmUnitType HidType()
{ return mHidType; }
//static void BinarizeProbs(const CuMatrix<BaseFloat>& probs, CuMatrix<BaseFloat>& states);
//I/O
void ReadFromStream(std::istream& rIn);
void WriteToStream(std::ostream& rOut);
protected:
CuMatrix<BaseFloat> mVisHid; ///< Matrix with neuron weights
CuVector<BaseFloat> mVisBias; ///< Vector with biases
CuVector<BaseFloat> mHidBias; ///< Vector with biases
CuMatrix<BaseFloat> mVisHidCorrection; ///< Matrix for linearity updates
CuVector<BaseFloat> mVisBiasCorrection; ///< Vector for bias updates
CuVector<BaseFloat> mHidBiasCorrection; ///< Vector for bias updates
CuMatrix<BaseFloat> mBackpropErrBuf;
RbmUnitType mVisType;
RbmUnitType mHidType;
};
////////////////////////////////////////////////////////////////////////////
// INLINE FUNCTIONS
// CuRbm::
inline
CuRbm::
CuRbm(size_t nInputs, size_t nOutputs, CuComponent *pPred)
: CuRbmBase(nInputs, nOutputs, pPred),
mVisHid(nInputs,nOutputs),
mVisBias(nInputs), mHidBias(nOutputs),
mVisHidCorrection(nInputs,nOutputs),
mVisBiasCorrection(nInputs), mHidBiasCorrection(nOutputs),
mBackpropErrBuf(),
mVisType(BERNOULLI),
mHidType(BERNOULLI)
{
mVisHidCorrection.SetConst(0.0);
mVisBiasCorrection.SetConst(0.0);
mHidBiasCorrection.SetConst(0.0);
}
inline
CuRbm::
~CuRbm()
{ }
inline CuComponent::ComponentType
CuRbm::
GetType() const
{
return CuComponent::RBM;
}
inline const char*
CuRbm::
GetName() const
{
return "<rbm>";
}
} //namespace
#endif
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