oh yes, my mind is a sieve!
i think it would be easy for someone to do.
fyi, the cube popping loop is in
ChartCell.cpp line 112
so i guess what you have to do is manipulate what hypotheses are
returned by Pop() in
RuleCubeQueue.cpp line 44
On 18/10/2011 17:08, Alexander Fraser wrote:
> Hi Hieu --
>
> I think that was Hieu :-), Christian F, Christian H and I, when we
> implemented the phrase-based cube pruning at MTM2.
>
> The cube pruning diversity number sets the minimal number of
> expansions for each coverage in a cube that will be expanded. This is
> OR'ed with the normal cube pruning expansions. The implementation of
> this is at line 130 of SearchCubePruning.cpp and line 395 of
> BitmapContainer.cpp.
>
> In the phrase-based experiments we did, using this parameter did not
> help search performance. So it may be that, at least for phrase-based,
> the intuition that certain *coverages* are systematically incorrectly
> pruned is not good (and instead one must look at individual
> hypotheses, which is what cube pruning does).
>
> This idea of diversity in hierarchical could be easily (trivially?)
> implemented in the same way, maybe it would help there.
>
> Cheers, Alex
>
>
> On Mon, Oct 17, 2011 at 2:56 PM, Hieu Hoang<[email protected]> wrote:
>> cube pruning *diversity*. I think philipp koehn added some heuristics to
>> phrase-based, not sure how it works
>>
>> On 17 October 2011 19:53, Lane Schwartz<[email protected]> wrote:
>>> Wait - seriously? Cube pruning is not implemented in the hierarchical
>>> model?
>>>
>>> On Sat, Oct 15, 2011 at 1:42 AM, Hieu Hoang<[email protected]> wrote:
>>>> hi baskaran
>>>>
>>>> no, it's not presently used it hierarchical pb models. It would be
>>>> interesting to try it, especially for syntax models, as arguably the
>>>> lack of
>>>> diversity is one of the problem with these models
>>>>
>>>> On 15/10/2011 04:40, Baskaran Sankaran wrote:
>>>>
>>>> Hi,
>>>>
>>>> I wonder, whether the param cube-pruning-diversity (cbd) is being used
>>>> when
>>>> using the moses_chart for hierarchical phrase-based models? If so, does
>>>> it
>>>> have the same meaning as in the regular phrase-based decoders?
>>>>
>>>> Thanks
>>>> - Baskaran
>>>>
>>>>
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>>>
>>> --
>>> When a place gets crowded enough to require ID's, social collapse is not
>>> far away. It is time to go elsewhere. The best thing about space travel
>>> is that it made it possible to go elsewhere.
>>> -- R.A. Heinlein, "Time Enough For Love"
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