conditional adj. 1.帶有條件的,有限制的;視…而定的。 2.【語法】條件的,假設(shè)的。 3.引起條件反射的。 n. 【語法】條件子句,條件詞。 be conditional on [upon] 在…條件下,以…為條件,取決于。 n. -ity 受限制性,有條件性,制約性;條件限制。 adv. -ly
at random 任意,隨便; 任意地,隨機(jī)地; 隨便地,任意地; 隨機(jī)的,任意的; 隨機(jī)地,任意地; 隨意地,任意地; 隨意地,隨機(jī)地
random n. 〔罕用語〕胡亂行為,偶然的[隨便的]行動(dòng)[過程]。 adj. 1.任意的,胡亂的,隨便的;(話等)信口亂說的;(人等)偶然碰到的。 2.隨機(jī)的;【物理學(xué)】無規(guī)則的;(石工)(大小)不齊的。 a random guess 瞎猜。 a random shot 亂射(的子彈);流彈。 at random 碰運(yùn)氣地;無目標(biāo)地,漫無目的地。 n. -icity 隨機(jī)性,無規(guī)性。
In this thesis , attention is concentrated on the english ner . ner is implemented with two methods , which are improved hmm and conditional random field , and the test result is analyzed . first , this thesis identifies the english named entity with improved hmm 分別利用了改進(jìn)的隱馬爾可夫模型( hiddenmarkovmodel , hmm )和條件隨機(jī)域模型( conditionalrandomfield , crf )兩種方法進(jìn)行英文命名實(shí)體的識(shí)別,并對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行了分析。
The result shows that its performance is better than the standard hmm , but it is not good at integrating the features like context information , semantic information and so on . second , this thesis identifies the english entity names with conditional random field approach integrating many features 通過對(duì)結(jié)果的分析,發(fā)現(xiàn)雖然其效果要比傳統(tǒng)的hmm模型有明顯的提高,但是對(duì)文本中的上下文信息、詞匯的語義信息等各種特征的結(jié)合能力還不是很理想。
百科解釋
Conditional random fields (CRFs) are a class of statistical modelling method often applied in pattern recognition and machine learning, where they are used for structured prediction. Whereas an ordinary classifier predicts a label for a single sample without regard to "neighboring" samples, a CRF can take context into account; e.