我想询问是否有可能提取（（Adj | Noun）+ |（（Adj | Noun）（Noun-Prep）？）（Adj | Noun））名词建议作者：Justeson和Katz（1995）在R package openNLP？
也就是说，我想用这种语言过滤来提取候选名词短语。
我无法理解它的含义。
你能帮我解释一下或将这种表现形式转换成R语言吗？
非常感谢。
library("openNLP")
acq <- "This paper describes a novel optical thread plug
gauge (OTPG) for internal thread inspection using machine
vision. The OTPG is composed of a rigid industrial
endoscope, a charge-coupled device camera, and a two
degree-of-freedom motion control unit. A sequence of
partial wall images of an internal thread are retrieved and
reconstructed into a 2D unwrapped image. Then, a digital
image processing and classification procedure is used to
normalize, segment, and determine the quality of the
internal thread."
acqTag <- tagPOS(acq)
acqTagSplit = strsplit(acqTag," ")
我被告知要为此开一个新问题。最初的问题是here。
答案 0 :(得分：3)
通过以下方式安装软件包：
install.packages("openNLP")
install.packages("openNLPmodels.en")
之后，您可以运行上面的代码。它将POS标记文本中的所有单词，并将所有单词标记为名词，动词等的原始文本返回。我这个例子如下：
acqTagSplit = strsplit(acqTag," ")
> acqTag
[1] "This/DT paper/NN describes/VBZ a/DT novel/NN optical/JJ thread/NN plug/NN gauge/NN (OTPG)/NN for/IN internal/JJ thread/NN inspection/NN using/VBG machine/NN vision./NN The/DT OTPG/NNP is/VBZ composed/VBN of/IN a/DT rigid/JJ industrial/JJ endoscope,/NNS a/DT charge-coupled/JJ device/NN camera,/VBD and/CC a/DT two/CD degree-of-freedom/NN motion/NN control/NN unit./NN A/DT sequence/NN of/IN partial/JJ wall/NN images/NNS of/IN an/DT internal/JJ thread/NN are/VBP retrieved/VBN and/CC reconstructed/VBN into/IN a/DT 2D/JJ unwrapped/JJ image./NN Then,/IN a/DT digital/JJ image/NN processing/NN and/CC classification/NN procedure/NN is/VBZ used/VBN to/TO normalize,/JJ segment,/NN and/CC determine/VB the/DT quality/NN of/IN the/DT internal/JJ thread./NN"
毕竟，用短划线分隔后，你就拥有了所有的POS标签。要将theese与单词分开，您可以先将单词分开 - 就像您在示例中所做的那样：
acqTagSplit = strsplit(acqTag," ")
acqTagSplit
[[1]]
[1] "This/DT" "paper/NN" "describes/VBZ"
[4] "a/DT" "novel/NN" "optical/JJ"
[7] "thread/NN" "plug/NN" "gauge/NN"
[10] "(OTPG)/NN" "for/IN" "internal/JJ"
[13] "thread/NN" "inspection/NN" "using/VBG"
[16] "machine/NN" "vision./NN" "The/DT"
[19] "OTPG/NNP" "is/VBZ" "composed/VBN"
[22] "of/IN" "a/DT" "rigid/JJ"
[25] "industrial/JJ" "endoscope,/NNS" "a/DT"
[28] "charge-coupled/JJ" "device/NN" "camera,/VBD"
[31] "and/CC" "a/DT" "two/CD"
[34] "degree-of-freedom/NN" "motion/NN" "control/NN"
[37] "unit./NN" "A/DT" "sequence/NN"
[40] "of/IN" "partial/JJ" "wall/NN"
[43] "images/NNS" "of/IN" "an/DT"
[46] "internal/JJ" "thread/NN" "are/VBP"
[49] "retrieved/VBN" "and/CC" "reconstructed/VBN"
[52] "into/IN" "a/DT" "2D/JJ"
[55] "unwrapped/JJ" "image./NN" "Then,/IN"
[58] "a/DT" "digital/JJ" "image/NN"
[61] "processing/NN" "and/CC" "classification/NN"
[64] "procedure/NN" "is/VBZ" "used/VBN"
[67] "to/TO" "normalize,/JJ" "segment,/NN"
[70] "and/CC" "determine/VB" "the/DT"
[73] "quality/NN" "of/IN" "the/DT"
[76] "internal/JJ" "thread./NN"
然后将POS标签中的单词分开：
strsplit(acqTagSplit[[1]], "/")
您将拥有一个列表，其中包含带有标签的所有单词，并且内部首先包含单词并在标签分隔后。参见：
str(strsplit(acqTagSplit[[1]], "/"))
List of 77
$ : chr [1:2] "This" "DT"
$ : chr [1:2] "paper" "NN"
$ : chr [1:2] "describes" "VBZ"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "novel" "NN"
$ : chr [1:2] "optical" "JJ"
$ : chr [1:2] "thread" "NN"
$ : chr [1:2] "plug" "NN"
$ : chr [1:2] "gauge" "NN"
$ : chr [1:2] "(OTPG)" "NN"
$ : chr [1:2] "for" "IN"
$ : chr [1:2] "internal" "JJ"
$ : chr [1:2] "thread" "NN"
$ : chr [1:2] "inspection" "NN"
$ : chr [1:2] "using" "VBG"
$ : chr [1:2] "machine" "NN"
$ : chr [1:2] "vision." "NN"
$ : chr [1:2] "The" "DT"
$ : chr [1:2] "OTPG" "NNP"
$ : chr [1:2] "is" "VBZ"
$ : chr [1:2] "composed" "VBN"
$ : chr [1:2] "of" "IN"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "rigid" "JJ"
$ : chr [1:2] "industrial" "JJ"
$ : chr [1:2] "endoscope," "NNS"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "charge-coupled" "JJ"
$ : chr [1:2] "device" "NN"
$ : chr [1:2] "camera," "VBD"
$ : chr [1:2] "and" "CC"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "two" "CD"
$ : chr [1:2] "degree-of-freedom" "NN"
$ : chr [1:2] "motion" "NN"
$ : chr [1:2] "control" "NN"
$ : chr [1:2] "unit." "NN"
$ : chr [1:2] "A" "DT"
$ : chr [1:2] "sequence" "NN"
$ : chr [1:2] "of" "IN"
$ : chr [1:2] "partial" "JJ"
$ : chr [1:2] "wall" "NN"
$ : chr [1:2] "images" "NNS"
$ : chr [1:2] "of" "IN"
$ : chr [1:2] "an" "DT"
$ : chr [1:2] "internal" "JJ"
$ : chr [1:2] "thread" "NN"
$ : chr [1:2] "are" "VBP"
$ : chr [1:2] "retrieved" "VBN"
$ : chr [1:2] "and" "CC"
$ : chr [1:2] "reconstructed" "VBN"
$ : chr [1:2] "into" "IN"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "2D" "JJ"
$ : chr [1:2] "unwrapped" "JJ"
$ : chr [1:2] "image." "NN"
$ : chr [1:2] "Then," "IN"
$ : chr [1:2] "a" "DT"
$ : chr [1:2] "digital" "JJ"
$ : chr [1:2] "image" "NN"
$ : chr [1:2] "processing" "NN"
$ : chr [1:2] "and" "CC"
$ : chr [1:2] "classification" "NN"
$ : chr [1:2] "procedure" "NN"
$ : chr [1:2] "is" "VBZ"
$ : chr [1:2] "used" "VBN"
$ : chr [1:2] "to" "TO"
$ : chr [1:2] "normalize," "JJ"
$ : chr [1:2] "segment," "NN"
$ : chr [1:2] "and" "CC"
$ : chr [1:2] "determine" "VB"
$ : chr [1:2] "the" "DT"
$ : chr [1:2] "quality" "NN"
$ : chr [1:2] "of" "IN"
$ : chr [1:2] "the" "DT"
$ : chr [1:2] "internal" "JJ"
$ : chr [1:2] "thread." "NN"
答案 1 :(得分：0)
似乎你需要理解正则表达式：（（Adj | Noun）+ |（（Adj | Noun）（Noun-Prep）？）（Adj | Noun））名词，将其转换为DFA（确定性）有限自动机）并遵循R中的DFA。
在这里，您可以通过正则表达式对常规语言进行描述。与文本处理中正则表达式的常见用法不同，“符号”不是简单字符，而是形容词，名词和名词介词。一旦理解了理论（自动机理论），您就可以轻松地在R中实现DFA（或者您选择的任何PL）。
问题在于不是R，问题是你不理解这个理论。