인공신경망 (Artificial Neural Network)

 우리네 인간의 학습 능력은 어떤 메커니즘으로 작동하는가? 비밀은 신경망에 있다.

1. 인간 신경망

 대뇌피질의 신경세포는 다음과 같이 수상돌기(dendrite)를 통해 다른 여러 신경세포로부터 입력 신호를 받아, 세포체(cell body)에서 정보 연산을 처리하고 축색(axon)을 통해 처리된 정보를 다른 신경세포로 전달한다. 이러한 신경세포는 시냅스라는 가중 연결자(weighted connectior)로 여러 층의 신경망을 구성한다.


 세포체에서의 연산은 입력 신호들의 합을 구하고 그것이 일정한 임계치가 되면 축색이 활성화되어 스파이크를 일으켜 다른 신경세포로 전기 신호를 전달한다. 이러한 특성을 모방하여 만든 것이 인공 신경망(artificial neural network)이다.

2. 인공 신경망

 하나의 인공 신경세포(perceptron)는 다음과 같이 n개의 입력 x1, x2, ..., xn에 대해 연결 강도 w1, w2, ..., wn에 따른 가중치를 곱하여 모든 값의 합(summation)을 구한다. 수식으로 표현하면, u = Σwixi


 이 가중치의 합은 다시 활성화 함수(activation function)를 통과해서 다음 신경세포로 전달될 출력을 결정한다. 위 축색에 활성화 함수는 0 또는 1로 출력하는 계단식 함수가 표현되어 있지만 이부분을 사용자 정의 함수로 원하는 특성을 가진 인공신경망 모델을 구현할 수 있다. 아래는 공돌이식 다이어그램.


 이렇게 활성화 함수를 정의하여 하나의 인공 신경세포에 대한 모델이 정립되면, 다음엔 이들의 연결구조를 고려한다. 우리는 다층 퍼셉트론을 볼 것이기 때문에 입력층과 출력층 사이에 1개 이상의 은닉층을 가지는 구조의 다층 신경망 구조를 한번 보자.


 이러한 신경망 구조에서의 학습은 시냅스의 연결 강도(weight)를 변화시키는 것인데 가장 기본적인 방법은 헤브의 학습 규칙으로 연결된 두 신경세포가 동시에 활성화되면 가중치를 증가시키는 방법이다. 해당 블로그에서 우리는 보다 진화한 오류역전파 알고리즘을 중점적으로 파기로 한다.

3. 다층 퍼셉트론

 다층 퍼셉트론은 인공 신경세포 퍼셉트론을 이용한 XOR문제를 먼저 이해해야하는데, 퍼셉트론 패턴 분류의 약점으로 선형 판별함수 때문에 XOR과 같은 출력을 내도록 경계선(hyperplane)을 만드는게 불가능하여 비선형 경계선을 만들기 위해 은닉층을 추가한게 다층 퍼셉트론이다.

 이제 곧 퇴근을 위하여, 구체적인 다층 퍼셉트론과 하마의 mini SGD기반 MLP 알고리즘으로 분류하는 기법은 다음 글에서 만나기로 하며 마친다.

99 comments:

  1. Our Artificial Intelligence course syllabus includes all the latest algorithms including ANN, MLP, CNN, RNN, LSTM, Autoencoders and many more and this course is considered to be best artificial intelligence course in this region. machine learning course

    ReplyDelete
  2. I must say you are very much concise and experienced at persuasive writing. I just loved your flair of writing.
    SAP training in Kolkata
    SAP training Kolkata
    Best SAP training in Kolkata
    SAP course in Kolkata

    ReplyDelete
  3. I would like to thank you for getting my neurons conspicuous with this brilliant article that you have written which contains every potential points which needs to considered on the given topic. Thanks for chipping in such a brilliant writing!
    Data Science training in Mumbai
    Data Science course in Mumbai
    SAP training in Mumbai

    ReplyDelete
  4. Top quality article with very informative information and found very knowledgeable thanks for sharing waiting for next blog.
    Data Analytics Course Online

    ReplyDelete
  5. Excellent blog with very impressive writing and unique content, information shared was very valuable and useful thanks for sharing.
    Data Science Course in Hyderabad

    ReplyDelete
  6. Tremendous blog quite easy to grasp the subject since the content is very simple to understand. Obviously, this helps the participants to engage themselves in to the subject without much difficulty. Hope you further educate the readers in the same manner and keep sharing the content as always you do.

    Data Science Course in Raipur

    ReplyDelete
  7. Stupendous blog huge applause to the blogger and hoping you to come up with such an extraordinary content in future. Surely, this post will inspire many aspirants who are very keen in gaining the knowledge. Expecting many more contents with lot more curiosity further.

    Digital Marketing Course in Raipur

    ReplyDelete
  8. Fantastic blog extremely good well enjoyed with the incredible informative content which surely activates the learners to gain the enough knowledge. Which in turn makes the readers to explore themselves and involve deeply in to the subject. Wish you to dispatch the similar content successively in future as well.

    artificial intelligence certification in raipur

    ReplyDelete
  9. Really nice and interesting blog information shared was valuable and enjoyed reading this one. Keep posting. Thanks for sharing.
    Data Science Training in Hyderabad

    ReplyDelete
  10. Nice Information Your first-class knowledge of this great job can become a suitable foundation for these people. I did some research on the subject and found that almost everyone will agree with your blog.
    Cyber Security Course in Bangalore

    ReplyDelete
  11. Writing in style and getting good compliments on the article is hard enough, to be honest, but you did it so calmly and with such a great feeling and got the job done. This item is owned with style and I give it a nice compliment. Better!
    Cyber Security Training in Bangalore

    ReplyDelete
  12. PMP Training19/10/20 23:00

    From the tons of comments on your posts, I guess I'm not the only one who has all the free time here. Keep up the good work. I was planning to write something like this on my website and you gave me an idea. PMP Training in Hyderabad

    ReplyDelete
  13. Fantastic article with informative content. Information shared was valuable and enjoyed reading it looking forward for next blog thank you.
    Ethical Hacking Course in Bangalore

    ReplyDelete
  14. Great article with valuable information found very resourceful and enjoyed reading it waiting for next blog updated thanks for sharing.
    typeerror nonetype object is not subscriptable

    ReplyDelete
  15. It's good to visit your blog again, it's been months for me. Well, this article that I have been waiting for so long. I will need this post to complete my college homework, and it has the exact same topic with your article. Thanks, have a good game.

    Business Analytics Course in Bangalore

    ReplyDelete
  16. I enjoyed the coursework, the presentations, the classmates and the teachers. And because my company reimbursed 100% of the tuition, the only cost I had to pay on my own was for books and supplies. Otherwise, I received a free master's degree. All I had to invest was my time.

    Data Analytics Course in Bangalore

    ReplyDelete
  17. Hi, This is a nice article you shared great information I have read it thanks for giving such a wonderful Blog for the reader. Water Softener System

    ReplyDelete
  18. I discovered your this post while hunting down some related data on website search...Its a decent post..keep posting and upgrade the data 토토사이트

    ReplyDelete
  19. Great article, a debt of gratitude is in order for assembling this! This is clearly one awesome post 토토사이트

    ReplyDelete
  20. It is a good site post without fail. Not too many people would actually, the way you just did. I am impressed that there is so much information about this subject that has been uncovered and you’ve defeated yourself this time, with so much quality. Good Works! 안전놀이터

    ReplyDelete
  21. 정말 많은 정보와 누군가에 대한 정보가있는이 사이트를 방문한 후 놀라운 경험. 또한 http://www.cosjj.com/에서 고품질의 코스프레 의상을 구입할 수 있습니다. 우르두어로 된 최신 업데이트에 대한 뉴스 업데이트가 가장 좋습니다. 그냥 즐기세요. 토토사이트

    ReplyDelete
  22. I am propelled by the information that you have on this blog. It demonstrates how well you grasp this subject 메이저사이트

    ReplyDelete
  23. Hi! This is my first visit to your blog! We are a team of volunteers and new initiatives in the same niche. Blog gave us useful information to work. You have done an amazing job 먹튀검증

    ReplyDelete
  24. I'm currently working on an assignment on this topic, and I would like to write a post based on your post. Would you like to visit my site and have a look at it later? 토토사이트

    ReplyDelete
  25. "I have been looking for articles on these topics for a long time. 먹튀검증 I don't know how grateful you are for posting on this topic. 토토커뮤니티사이트Thank you for the numerous articles on this site, I will subscribe to those links in my bookmarks and visit them often. Have a nice day
    토토커뮤니티"

    ReplyDelete
  26. I've been troubled for several days with this topic. 먹튀검증, But by chance looking at your post solved my problem! I will leave my blog, so when would you like to visit it?

    ReplyDelete
  27. I came to this site with the introduction of a friend around me먹튀검증 and I was very impressed when I found your writing. I'll come back often after bookmarking! 먹튀검증

    ReplyDelete
  28. Fantastic article with valuable information found very useful looking forward for next blog thank you.
    Data Science Course in Bangalore

    ReplyDelete
  29. I have to search sites with relevant information ,This is a
    wonderful blog,These type of blog keeps the users interest in
    the website, i am impressed. thank you.
    Data Science Training in Bangalore

    ReplyDelete
  30. Terrific post thoroughly enjoyed reading the blog and more over found to be the tremendous one. In fact, educating the participants with it's amazing content. Hope you share the similar content consecutively.

    Data Analytics training in Raipur

    ReplyDelete
  31. Fantastic blog extremely good well enjoyed with the incredible informative content which surely activates the learners to gain the enough knowledge. Which in turn makes the readers to explore themselves and involve deeply in to the subject. Wish you to dispatch the similar content successively in future as well.

    Data Science training

    ReplyDelete
  32. Fantastic blog extremely good well enjoyed with the incredible informative content which surely activates the learners to gain the enough knowledge. Which in turn makes the readers to explore themselves and involve deeply in to the subject. Wish you to dispatch the similar content successively in future as well.

    Data Science training

    ReplyDelete
  33. Fantastic blog extremely good well enjoyed with the incredible informative content which surely activates the learners to gain the enough knowledge. Which in turn makes the readers to explore themselves and involve deeply in to the subject. Wish you to dispatch the similar content successively in future as well.

    Data Science training

    ReplyDelete
  34. Truly incredible blog found to be very impressive due to which the learners who ever go through it will try to explore themselves with the content to develop the skills to an extreme level. Eventually, thanking the blogger to come up with such an phenomenal content. Hope you arrive with the similar content in future as well.

    Digital Marketing training in Raipur

    ReplyDelete
  35. Terrific post thoroughly enjoyed reading the blog and more over found to be the tremendous one. In fact, educating the participants with it's amazing content. Hope you share the similar content consecutively.

    Data Analytics Course in bhilai

    ReplyDelete
  36. Highly appreciable regarding the uniqueness of the content. This perhaps makes the readers feels excited to get stick to the subject. Certainly, the learners would thank the blogger to come up with the innovative content which keeps the readers to be up to date to stand by the competition. Once again nice blog keep it up and keep sharing the content as always.

    Data Science certification in Bhilai

    ReplyDelete
  37. Wonderful blog found to be very impressive to come across such an awesome blog. I should really appreciate the blogger for the efforts they have put in to develop such an amazing content for all the curious readers who are very keen of being updated across every corner. Ultimately, this is an awesome experience for the readers. Anyways, thanks a lot and keep sharing the content in future too.

    Digital Marketing training in Bhilai

    ReplyDelete
  38. Fantastic blog with excellent information and valuable content just added your blog to my bookmarking sites thank for sharing.
    Data Science Course in Chennai

    ReplyDelete
  39. Your article was very impressive to me. It was unexpected information,but after reading it like this 카지노사이트, I found it very interesting.

    ReplyDelete
  40. The assignment submission period was over and I was nervous, 메이저놀이터 and I am very happy to see your post just in time and it was a great help. Thank you ! Leave your blog address below. Please visit me anytime.

    ReplyDelete
  41. Are you the one who studies this subject?? I have a headache with this subject.온라인바둑이Looking at your writing was very helpful.

    ReplyDelete
  42. It's very interesting. And it's fun. This is a timeless article. I also write articles related to , and I run a community related to 안전놀이터. For more information, please feel free to visit !!

    ReplyDelete
  43. Your article is great, but I think it will be more complete if you add some topics to this article. I have these types of articles on my blog too. Would you like to visit them?먹튀검증

    ReplyDelete
  44. The assignment submission period was over and I was nervous, 메이저놀이터 and I am very happy to see your post just in time and it was a great help. Thank you ! Leave your blog address below. Please visit me anytime.

    ReplyDelete
  45. Your information was very useful to me. That's exactly what I've been looking for 카지노사이트!

    ReplyDelete
  46. 토토마틴에서는 검증 된 토토사이트만 선별하여 방문자들에게 제공합니다. 안전놀이터,메이저사이트,메이저놀이터는 토토마틴에서 검증 후 이용하시는 것이 ...

    ReplyDelete
  47. Nice information, valuable and excellent design, as share good stuff with good ideas and concepts. 온라인홀덤

    ReplyDelete
  48. I feel very grateful that I read this. It is very helpful and very informative and I really learned a lot from it.
    Data Science Course in Chennai

    ReplyDelete
  49. All of these posts were incredible perfect. It would be great if you’ll post more updates and your website is really cool and this is a great inspiring article.
    Artificial Intelligence course in Chennai

    ReplyDelete
  50. I don't know how many hours I've been searching for a simple article like this. Thanks to your writing, I am very happy to complete the process now. 메이저놀이터

    ReplyDelete
  51. Your writing is perfect and complete. However, I think it will be more wonderful if your post includes additional topics that I am thinking of. I have a lot of posts on my site similar to your topic. Would you like to visit once? 토토커뮤니티

    ReplyDelete
  52. I will bookmark this site and come to it from time to time. Your writing has been of great help to me.바카라사이트

    ReplyDelete
  53. I just got to this amazing site not long ago. I was actually captured with the piece of resources you have got here. Big thumbs up for making such wonderful blog page!
    Pmp training in hyderabad

    ReplyDelete
  54. You have completed certain reliable points there. I did some research on the subject and found that almost everyone will agree with your blog.

    Data Science Training in Bangalore

    ReplyDelete
  55. Wonderful blog found to be very impressive to come across such an awesome blog. I should really appreciate the blogger for the efforts they have put in to develop such amazing content for all the curious readers who are very keen on being updated across every corner. Ultimately, this is an awesome experience for the readers. Anyways, thanks a lot and keep sharing the content in the future too.

    Digital Marketing Training in Bangalore

    ReplyDelete
  56. I wanted to leave a little comment to support you and wish you the best of luck. We wish you the best of luck in all of your blogging endeavors.

    Artificial Intelligence Training in Bangalore

    ReplyDelete
  57. The Extraordinary blog went amazed by the content that they have developed in a very descriptive manner. This type of content surely ensures the participants explore themselves. Hope you deliver the same near the future as well. Gratitude to the blogger for the efforts.

    Machine Learning Course in Bangalore

    ReplyDelete
  58. Excellent Blog! I would like to thank you for the efforts you have made in writing this post. Gained lots of knowledge.
    Data Analytics Course

    ReplyDelete

  59. What an incredible message this is. Truly one of the best posts I have ever seen in my life. Wow, keep it up.
    AI Courses in Bangalore

    ReplyDelete
  60. Awesome article. I enjoyed reading your articles. this can be really a good scan for me. wanting forward to reading new articles. maintain the nice work!
    Data Science Courses in Bangalore

    ReplyDelete
  61. I am sure it will help many people. Keep up the good work. It's very compelling and I enjoyed browsing the entire blog.
    Business Analytics Course in Bangalore

    ReplyDelete
  62. Hello, I read the post well. 안전놀이터추천 It's a really interesting topic and it has helped me a lot. In fact, I also run a website with similar content to your posting. Please visit once

    ReplyDelete
  63. I don't know how many hours I've been searching for a simple article like this. Thanks to your writing, I am very happy to complete the process now. 안전놀이터

    ReplyDelete
  64. In the meantime, I wondered why I couldn't think of the answer to this simple problem like this. Your article is an article that gives the answer to all the content I've been contemplating. 메이저토토사이트

    ReplyDelete
  65. I’ve been absent for a while, but now I remember why I used to love this website. Thanks, I will try and check back more often. How frequently you update your site?
    egaon casino

    ReplyDelete
  66. Hi there mates, how is all, and what you would like to say concerning this
    article, in my view its truly awesome in favor of me.

    Click here to chceck my blog :: 휴게텔
    (jk)

    ReplyDelete
  67. I bookmarked your website because this site contains valuable information. I am very satisfied with the quality and the presentation of the articles. Thank you so much for saving great things. I am very grateful for this site.

    Data Science Training in Bangalore

    ReplyDelete
  68. I have voiced some of the posts on your website now, and I really like your blogging style. I added it to my list of favorite blogging sites and will be back soon ...

    Digital Marketing Training in Bangalore

    ReplyDelete
  69. Wow it is really wonderful and awesome thus it is very much useful for me to understand many concepts and helped me a lot. it is really explainable very well and i got more information from your blog.
    DevOps Training in Hyderabad
    DevOps Course in Hyderabad

    ReplyDelete
  70. Extraordinary blog went amazed with the content that they have developed in a very descriptive manner. This type of content surely ensures the participants to explore themselves. Hope you deliver the same near the future as well. Gratitude to the blogger for the efforts.

    Data Science Training

    ReplyDelete
  71. Amazing article..!! Thank you so much for this informative post. I found some interesting points and lots of information from your blog. Thanks 토토커뮤니티

    ReplyDelete
  72. Stupendous blog huge applause to the blogger and hoping you to come up with such an extraordinary content in future. Surely, this post will inspire many aspirants who are very keen in gaining the knowledge. Expecting many more contents with lot more curiosity further.

    Data Science Certification in Bhilai

    ReplyDelete
  73. I was just examining through the web looking for certain information and ran over your blog.It shows how well you understand this subject. Bookmarked this page, will return for extra. data science course in vadodara

    ReplyDelete
  74. Recently, I have started to read a lot of unique articles on different sites, and I am enjoying that a lot. Although, I must tell you that I still like the articles here a lot. They are also unique in their own way. 안전놀이터추천

    ReplyDelete
  75. Extremely overall quite fascinating post. I was searching for this sort of data and delighted in perusing this one. Continue posting. A debt of gratitude is in order for sharing. python course in delhi

    ReplyDelete
  76. Thank you for some other informative blog. Where else could I get that type of information written in such an ideal means? I have a mission that I’m just now working on, and I have been at the look out for such information. 안전놀이터 It helped me a lot. If you have time, I hope you come to my site and share your opinions. Have a nice day.

    ReplyDelete
  77. I wanted to thank you for this excellent read!! I definitely loved every little bit of it. I have you bookmarked your site to check out the new stuff you post 무료야설 .

    ReplyDelete
  78. I can see that you are an expert at your field! I am launching a website soon, and your information will be very useful for me.. Thanks for all your help and wishing you all the success in your business 휴게텔

    ReplyDelete
  79. Your blog is so amazing 출장안마. Information is very useful for everyone. such a amazing post please keep posting.

    ReplyDelete
  80. I assumed it is usually a preview to post in case others appeared to be having problems getting acquainted with nonetheless We're a little bit hesitant merely i'm permitted to decide to put companies plus covers for listed here 타이마사지

    ReplyDelete
  81. Thanks for your marvelous posting! I actually enjoyed reading it, you could be
    a great author.I will remember to bookmark your blog and will
    eventually come back from now on. I want to encourage you to continue your great
    writing, have a nice weekend!

    Website:ポーカー


    ReplyDelete
  82. Hello, I'm happy to see some great articles on your site. Would you like to come to my site later? My site also has posts, comments and communities similar to yours. Please visit and take a look 토토사이트


    ReplyDelete
  83. I'm so happy to finally find a post with what I want. 메이저토토사이트 You have inspired me a lot. If you are satisfied, please visit my website and leave your feedback.


    ReplyDelete
  84. When I read your article on this topic, the first thought seems profound and difficult. There is also a bulletin board for discussion of articles and photos similar to this topic on my site, but I would like to visit once when I have time to discuss this topic. 안전토토사이트


    ReplyDelete
  85. A good blog always contains new and exciting information, and reading it I feel like this blog really has all of these qualities that make it a blog.

    Artificial Intelligence Training in Bangalore

    ReplyDelete
  86. I was impressed by your writing. Your writing is impressive. I want to write like you.안전놀이터 I hope you can read my post and let me know what to modify. My writing is in I would like you to visit my blog.


    ReplyDelete
  87. It is late to find this act. At least one should be familiar with the fact that such events exist. I agree with your blog and will come back to inspect it further in the future, so keep your performance going.

    Digital Marketing Training in Bangalore

    ReplyDelete
  88. A good blog always contains new and exciting information and as I read it I felt that this blog really has all of these qualities that make a blog.

    Data Science Training in Bangalore

    ReplyDelete
  89. Oh, the data you've shared in this incredible article is just magnificent. I am definitely going to make more use of this data in my future projects. You must continue sharing more data like this with us. 먹튀검증업체


    ReplyDelete
  90. I am more curious to take an interest in some of them. I hope you will provide more information on these topics in your next articles.

    Machine Learning Course in Bangalore

    ReplyDelete
  91. Youre so right. Im there with you. Your weblog is definitely worth a read if anyone comes throughout it. Im lucky I did because now Ive received a whole new view of this. 메이저사이트추천


    ReplyDelete
  92. That's a really impressive new idea! 메이저토토사이트추천 It touched me a lot. I would love to hear your opinion on my site. Please come to the site I run once and leave a comment. Thank you.


    ReplyDelete
  93. Hello, I read the post well. 메이저토토 It's a really interesting topic and it has helped me a lot. In fact, I also run a website with similar content to your posting. Please visit once


    ReplyDelete
  94. You uploaded a fantastic write-up. I was extremely touched after I saw your writing, and also I actually suched as the tale of what I was seeking due to the fact that it consisted of whatever. I'm so interested concerning exactly how you considered this info and also exactly how you discovered it. Take a look at my writing and also let me recognize. click the up coming document

    ReplyDelete
  95. Hi there, I simply hopped over in your website by way of StumbleUpon. Now not one thing I’d typically learn, but I favored your emotions none the less. Thank you for making something worth reading. 메이저사이트순위


    ReplyDelete
  96. Excellent information on your blog, thank you for taking the time to share with us. Amazing insight you have on this, it's nice to find a website that details so much information about different artists 토토

    ReplyDelete
  97. I accidentally searched and visited your site. I still saw several posts during my visit, but the text was neat and readable. I will quote this post and post it on my blog. Would you like to visit my blog later? 토토사이트순위


    ReplyDelete
  98. Hello, I am one of the most impressed people in your article. 안전놀이터추천 I'm very curious about how you write such a good article. Are you an expert on this subject? I think so. Thank you again for allowing me to read these posts, and have a nice day today. Thank you.


    ReplyDelete