Moses::SearchNormalBatch Class Reference

#include <SearchNormalBatch.h>

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List of all members.

Public Member Functions
	SearchNormalBatch (Manager &manager, const InputType &source, const TranslationOptionCollection &transOptColl)
	~SearchNormalBatch ()
void	Decode ()
Protected Member Functions
void	ExpandHypothesis (const Hypothesis &hypothesis, const TranslationOption &transOpt, float expectedScore)
void	EvalAndMergePartialHypos ()
Protected Attributes
std::vector< const StatelessFeatureFunction * >	m_stateless_ffs
std::map< int, LanguageModel * >	m_dlm_ffs
std::map< int, StatefulFeatureFunction * >	m_stateful_ffs
std::vector< Hypothesis * >	m_partial_hypos
uint32_t	m_batch_size
int	m_max_stack_size

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Detailed Description

Implements the phrase-based stack decoding algorithm (no cube pruning) with a twist... Language model requests are batched together, duplicate requests are removed, and requests are sent together. Useful for distributed LM where network latency is an issue.

Definition at line 18 of file SearchNormalBatch.h.

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Constructor & Destructor Documentation

Moses::SearchNormalBatch::SearchNormalBatch	(	Manager &	manager,
		const InputType &	source,
		const TranslationOptionCollection &	transOptColl
	)

Definition at line 13 of file SearchNormalBatch.cpp.

References Moses::StaticData::GetMaxHypoStackSize(), Moses::StatefulFeatureFunction::GetStatefulFeatureFunctions(), Moses::StatelessFeatureFunction::GetStatelessFeatureFunctions(), Moses::StaticData::Instance(), m_dlm_ffs, m_max_stack_size, m_stateful_ffs, and m_stateless_ffs.

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Moses::SearchNormalBatch::~SearchNormalBatch

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)

Definition at line 35 of file SearchNormalBatch.cpp.

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Member Function Documentation

void Moses::SearchNormalBatch::Decode

(

)

[virtual]

Main decoder loop that translates a sentence by expanding hypotheses stack by stack, until the end of the sentence.

Reimplemented from Moses::SearchNormal.

Definition at line 43 of file SearchNormalBatch.cpp.

References Moses::SearchNormal::actual_hypoStack, Moses::HypothesisStack::begin(), Moses::HypothesisStackNormal::CleanupArcList(), Moses::Hypothesis::Create(), Moses::HypothesisStack::end(), EvalAndMergePartialHypos(), Moses::StaticData::GetMaxHypoStackSize(), Moses::Manager::GetSentenceStats(), Moses::StaticData::GetTimeoutThreshold(), Moses::GetUserTime(), IFVERBOSE, Moses::StaticData::Instance(), Moses::SearchNormal::interrupted_flag, Moses::SearchNormal::m_hypoStackColl, Moses::Search::m_initialTransOpt, Moses::Search::m_manager, Moses::SearchNormal::m_source, Moses::SearchNormal::OutputHypoStackSize(), Moses::SearchNormal::ProcessOneHypothesis(), Moses::HypothesisStackNormal::PruneToSize(), Moses::SentenceStats::StartTimeStack(), Moses::stats, Moses::SentenceStats::StopTimeStack(), and VERBOSE.

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void Moses::SearchNormalBatch::EvalAndMergePartialHypos

(

)

[protected]

Definition at line 147 of file SearchNormalBatch.cpp.

References Moses::Hypothesis::EvaluateWhenApplied(), Moses::WordsBitmap::GetNumWordsCovered(), Moses::Hypothesis::GetWordsBitmap(), m_dlm_ffs, Moses::SearchNormal::m_hypoStackColl, m_max_stack_size, m_partial_hypos, m_stateful_ffs, m_stateless_ffs, and Moses::HypothesisStackNormal::PruneToSize().

Referenced by Decode(), and ExpandHypothesis().

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void Moses::SearchNormalBatch::ExpandHypothesis	(	const Hypothesis &	hypothesis,
		const TranslationOption &	transOpt,
		float	expectedScore
	)			[protected, virtual]

Expand one hypothesis with a translation option. this involves initial creation, scoring and adding it to the proper stack

Parameters:

	hypothesis	hypothesis to be expanded upon
	transOpt	translation option (phrase translation) that is applied to create the new hypothesis
	expectedScore	base score for early discarding (base hypothesis score plus future score estimation)

Reimplemented from Moses::SearchNormal.

Definition at line 108 of file SearchNormalBatch.cpp.

References Moses::Hypothesis::CreateNext(), EvalAndMergePartialHypos(), Moses::Hypothesis::GetFFState(), Moses::Hypothesis::GetPrevHypo(), Moses::Manager::GetSentenceStats(), IFVERBOSE, Moses::StaticData::Instance(), m_batch_size, m_dlm_ffs, Moses::Search::m_manager, m_partial_hypos, NULL, Moses::SentenceStats::StartTimeBuildHyp(), Moses::stats, Moses::SentenceStats::StopTimeBuildHyp(), Moses::StaticData::UseEarlyDiscarding(), and UTIL_THROW2.

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Member Data Documentation

uint32_t Moses::SearchNormalBatch::m_batch_size [protected]

Definition at line 27 of file SearchNormalBatch.h.

Referenced by ExpandHypothesis().

std::map<int, LanguageModel*> Moses::SearchNormalBatch::m_dlm_ffs [protected]

Definition at line 24 of file SearchNormalBatch.h.

Referenced by EvalAndMergePartialHypos(), ExpandHypothesis(), and SearchNormalBatch().

int Moses::SearchNormalBatch::m_max_stack_size [protected]

Definition at line 28 of file SearchNormalBatch.h.

Referenced by EvalAndMergePartialHypos(), and SearchNormalBatch().

std::vector<Hypothesis*> Moses::SearchNormalBatch::m_partial_hypos [protected]

Definition at line 26 of file SearchNormalBatch.h.

Referenced by EvalAndMergePartialHypos(), and ExpandHypothesis().

std::map<int, StatefulFeatureFunction*> Moses::SearchNormalBatch::m_stateful_ffs [protected]

Definition at line 25 of file SearchNormalBatch.h.

Referenced by EvalAndMergePartialHypos(), and SearchNormalBatch().

std::vector<const StatelessFeatureFunction*> Moses::SearchNormalBatch::m_stateless_ffs [protected]

Definition at line 23 of file SearchNormalBatch.h.

Referenced by EvalAndMergePartialHypos(), and SearchNormalBatch().

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The documentation for this class was generated from the following files:

• mosesdecoder/moses/SearchNormalBatch.h
• mosesdecoder/moses/SearchNormalBatch.cpp