Hi,
take a look at the WIPO branch of Moses. We have something very similar, 
but thread-safe. You can specify weights and other moses parameters by 
using <specOpt switches="-lm 0.5 -tm 2 -v 2"> anywhere in a sentence. 
The weights specified in one sentence do not affect the translation of 
another sentence.

Best,
Marcin

On 05.04.2012 17:54, Prashant Mathur wrote:
> Hi all,
>
> We are trying to update feature weights dynamically during decoding. We
> are doing this by adding additional lines of input, delimited with a
> special token to tell Moses to update weights.
>
> For example,
> ----
> First sentence.
> @CMD@ weight-l=0.5
> Change the LM weight for this sentence.
> ----
> While debugging our new code, we noticed that several lines of the input
> were read before being translated.
>
> For instance, this is the input file:
> sentence0
> @CMD@ weight-l=0.5
> sentence1
> @CMD@ weight-l=0.3
> sentence2
>
> Whenever a @CMD@ line is read, we execute the corresponding command to
> change the weights. So we would expect all three sentences to be
> translated with different weights.
> Instead what happens is that all the commands are executed before
> translating *any* sentence, so that all sentences are translated with
> the last modified weights (i.e weight-l=0.3)
>
> This happens when the inputfile is given as an argument (to -i) and also
> when it is read from the stdin.
> Only if we type the lines to the console one by one do we get the
> expected result.
>
> Is there any way to force Moses to read and process each line at a time?
>


-- 
dr inż. Marcin Junczys-Dowmunt
Uniwersytet im. Adama Mickiewicza
Wydział Matematyki i Informatyki
ul. Umultowska 87
61-614 Poznań
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