RUBY pdf-extract gem从学术文章中提取引用不起作用？

Question

我是红宝石及其pdf提取宝石的新手。在安装了用于64位的ruby并安装了相关的Development Kit之后，我已经使用以下代码安装了pdf-extract：

gem install pdf-extract

通过查看网站https://github.com/CrossRef/pdfextract的快速示例，

我尝试过

pdf摘录-参考文献C：/dnm1.pdf

执行上面的代码时，出现如下错误：

C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/commander/runner.rb： 384：在

block in require_program': program version required (Commander::Runner::
  CommandError)
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/command
  er/runner.rb:383:in

中各 从C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/command er / runner.rb：383：在

require_program'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/command
  er/runner.rb:51:in

运行中！ 从C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/command er / delegates.rb：8：in

run!'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/commander-4.2.0/lib/command
  er/import.rb:10:in

block in' C：/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb：55：在

require
  ': 126: The specified module could not be found.   - C:/Ruby200-x64/lib/ruby/gem
  s/2.0.0/gems/libsvm-ruby-swig-0.4.0/ext/libsvm.so (LoadError)
          from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:5
  5:in

中需要 从C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/libsvm-ruby-swig-0.4.0/lib/ svm.rb：1：

<top (required)>'
          from C:/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:5
  5:in

中需要 从C：/Ruby200-x64/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb：5 5：在

require'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/lib/refer
  ences/score.rb:1:in

' 来自C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/lib/refer ences / references.rb：3：in

require_relative'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/lib/refer
  ences/references.rb:3:in

' 从C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/lib/pdf-e xtract.rb：10：in

require_relative'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/lib/pdf-e
  xtract.rb:10:in

' 来自C：/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/bin/pdf-e xtract：5：in

require_relative'
          from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/pdf-extract-0.1.1/bin/pdf-e
  xtract:5:in

'

来自C：/ Ruby200-x64 / bin / pdf-extract：23：载入中 从C：/ Ruby200-x64 / bin / pdf-extract：23：在主要位置

我已经通过网络检查了与pdf提取相关的问题，但找不到很多有用的东西。我在做什么错？

Answer 1

现在这很可悲... 6年后，我也遇到了这个问题。