nlp - how to treat with <s> and </s> in calculating unigram LM? -

-

i beginner in nlp , i'm confused how treat <s> , </s> symbols calculate counts unigram model? should count them or ignore?

if understand correctly <s> , </s> mean special (fake) unigrams first , last unigrams (actually, pre-first , after-last) each text, there no need in them unigrams, because string contains these unigrams , provide no additional information.

such special unigrams can useful in case of high-order n-grams: example, allows extract 1-word string hello 2 bigrams: <s> hello , hello </s> or 3 trigrams: <s0> <s1> hello, <s1> hello </s1>,hello </s1> </s0>.


Comments

Post a Comment

Popular posts from this blog

java - Ebean enhancement ignores a model -

-
we using avaje-agentloader enhance our ebeans. ebeans in same package. including loader, agent & base ebean library in our project (via sbt): "org.avaje" % "avaje-agentloader" % "1.1.2", "org.avaje.ebeanorm" % "avaje-ebeanorm" % "4.5.5", "org.avaje.ebeanorm" % "avaje-ebeanorm-agent" % "4.5.2", however, when loader runs enhancement, skips 1 ebean. each ebean annotated @entity , extends com.avaje.ebean.model . there seem no differences between ones enhanced , 1 not. there no includes, or extends, etc. basically, i'm wondering if has run across issue in past, or has insights. things we've tried: specifying actual classes enhanced via serverconfig.setclasses(...) specifying pakages analyse/enhance via serverconfig.addpackage(...) or setpackages(...) not specifying @ , having loader analyse all. we've set break-point @ transformer.transform , bean in questio...
Read more

javascript - Reference error while trying to encapsulate an animation function -

-
i'm trying put function own class object. here below. the canvas property holds dom functions, , getting error next property, ctx, should refer method defined in canvas. so property ctx should refer ctx method defined in canvas property. bt when page loads, dev tools telling me there reference error @ point - canvas not defined. i encounter problem when canvas defined in external global variable. var drawcrash = { canvas : function () { dom methods here }, ctx : canvas.ctx, pointer : canvas.pointer, particles : "", nbrparticles : 160, speed : 6, strength : .4, radius : 4, perspective : 0.5, ang : null, cosorsin1 : null, cosorsin2 : null, //functions setspeed : function (_inputspeed) { this.speed = _inputspeed; }, startdrawing : function () { pointer.down = function() { } } run(); } } i believe canvas not available. don't put line ctx: c...
Read more

SQL php on different pages to Insert (mysqli) -

-
i have piece of php code, works when placed on index page ( index.php ), nothing if put in page, i.e. add.php for example: having code add.php page, tried go to: www.myhost.com/add.php , nothing happen. if copy code index.php , go page www.myhost.com/index.php add row in sql table. why that? <?php $server="mysql.server.com"; $user="randomusr"; $pass="randompwd"; $db="randomdb"; $link=mysqli_connect($server, $user, $pass, $db); $result=mysqli_query($link,"select * `battery` `id`"); $query = "insert battery (id,type,owner,charge,time) values ('1','lily002','maisnow','15','2015-04-22 17:20:28')"; mysqli_query($link, $query); header("location: index.php"); //this 1 comment out when copied index.php ?> l # name type collation attributes null 1 id int(16) no ...
Read more