機械学習フレームワーク横断、Chainer, Keras

•

5 likes•6,249 views

Teppei Murakami

ChainerとKerasを触ってみた

Engineering

目次
• 問題設定
• chainer導入と実装
• keras導入と実装
• chainer keras比較
• 感想

分類問題の流れ
対
象
物
特
徴
量
分
類
器
A
C
B
• 対象物から問題に適した特徴量を抽出
• 特徴量を分類器に入力
• 対象物がどのクラスに属しているか判定

今回扱うデータ
対
象
物
特
徴
量
分
類
器
A
C
B
アヤメ
setosa
virginica
versicolor

特徴量の内容
対
象
物
特
徴
量
分
類
器
A
C
B
花びらの長さと幅
がく片の長さと幅
の4次元ベクトル

扱う分類器
対
象
物
特
徴
量
分
類
器
A
C
B
NN(ニューラルネットワーク)

今回の構成
花びらの長さ
花びらの幅
(中間層の1つ目のノードの入出力のみに着目)
がく片の幅
がく片の長さ
b(バイアス)
入力層
中間層
出力層
W1
W2

W1
W2
教師信号の内要
[1, 0, 0]
[0, 1, 0]
[0, 0, 1]

参考図書
『Chainerによる実践深層学習』新納浩幸
http://shop.ohmsha.co.jp/shopdetail/000000004728/

Keras実装
モデルの記述
損失関数、最適化
手法を設定して
コンパイル
バッチ数、繰り返し
回数を設定して学習

実行結果比較
• 識別制度がChainer：66.67% Keras：69.33%と似
たような結果に
• 出力結果を見比べてみると、正解クラスが1のとこ
ろを0と識別ミスしている => まだまだチューニン
グが必要そう
今回はたまたま同じような結果になったが、ランダムに決まる更新アルゴリズムの
初期値によってはパラメタータの値が変わってくるので必ずしも一致するとは限らない。

感想
• Chainer：変数の中身を見ながら実装する中で、細
かい理論の理解もしながら進められた。(参考文献
が良かった)
• Keras：NNの実装イメージがついている前提で触る
と、とてもシンプルでチューニングしやすかった

Featured

Content Methodology: A Best Practices Report (Webinar)

contently

How to Prepare For a Successful Job Search for 2024

Albert Qian

A report by thenetworkone and Kurio. The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).

Social Media Marketing Trends 2024 // The Global Indie Insights

Kurio // The Social Media Age(ncy)

The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands. It’s important that you’re ready to implement new strategies in 2024. Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024. You’ll learn: - The latest trends in AI and automation, and what this means for an evolving paid search ecosystem. - New developments in privacy and data regulation. - Emerging ad formats that are expected to make an impact next year. Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape. If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.

Trends In Paid Search: Navigating The Digital Landscape In 2024

Search Engine Journal

From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world. With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively. The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage. Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience. See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers See the original article on Forbes here: http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b

5 Public speaking tips from TED - Visualized summary

SpeakerHub

Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world. Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance. For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age. Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.

ChatGPT and the Future of Work - Clark Boyd

Clark Boyd

Getting into the tech field. what next

Tessa Mero

Google's Just Not That Into You: Understanding Core Updates & Search Intent

Lily Ray

How to have difficult conversations

Rajiv Jayarajah, MAppComm, ACC

Introduction to Data Science

Christy Abraham Joy

Time Management & Productivity - Best Practices

Vit Horky

The six step guide to practical project management If you think managing projects is too difficult, think again. We’ve stripped back project management processes to the basics – to make it quicker and easier, without sacrificing the vital ingredients for success. “If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.” Dr Andrew Makar, Tactical Project Management

The six step guide to practical project management

MindGenius

Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...

RachelPearson36

During this webinar, Anand Bagmar demonstrates how AI tools such as ChatGPT can be applied to various stages of the software development life cycle (SDLC) using an eCommerce application case study. Find the on-demand recording and more info at https://applitools.info/b59 Key takeaways: • Learn how to use ChatGPT to add AI power to your testing and test automation • Understand the limitations of the technology and where human expertise is crucial • Gain insight into different AI-based tools • Adopt AI-based tools to stay relevant and optimize work for developers and testers * ChatGPT and OpenAI belong to OpenAI, L.L.C.

Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...

Applitools

12 Ways to Increase Your Influence at Work

GetSmarter

ChatGPT webinar slides

Alireza Esmikhani

More than Just Lines on a Map: Best Practices for U.S Bike Routes

Project for Public Spaces & National Center for Biking and Walking

Has your project been caught in a storm of deadlines, clashing requirements, and the need to change course halfway through? If yes, then check out how the administration team navigated through all of this, relocating 160 people from 3 countries and opening 2 offices during the most turbulent time in the last 20 years. Belka Games’ Chief Administrative Officer, Katerina Rudko, will share universal approaches and life hacks that can help your project survive unstable periods when there seem to be too many tasks and a lack of time and people.

Ride the Storm: Navigating Through Unstable Periods / Katerina Rudko (Belka G...

DevGAMM Conference

Barbie - Brand Strategy Presentation

Erica Santiago

According to the latest State of the American Manager report from Gallup, employees who have regular meetings with their managers are almost three times as likely to be engaged as those who don’t. These regular check-ins keep managers and employees in sync and aligned. Want to see better manager/employee relationships in your organisation? Then make an all-in commitment to 1:1 meetings. Not sure how? You’ve come to the right place. In this webinar with Jamie Resker, Founder and Practice Leader for Employee Performance Solutions (EPS), and Teala Wilson, Talent Management Consultant at Saba Software, you’ll get the inside track on how to hold effective 1:1 meetings, including tips for getting managers on board. • Go beyond discussing the status of everyday work to higher level topics, including recognition, performance, development, and career aspirations • Learn how to decide meeting frequency, what to cover, as well as roles and responsibilities of the manager and employee • Understand how managers can build trust and make it comfortable for employees to provide upward feedback • Unite your organisation with a unified approach to 1:1 meetings Join us for this 1-hour webinar to get practical tips for building better manager-employee relationships with intention and purpose. About the Speakers Jamie Resker - Founder and Practice Leader for Employee Performance Solutions (EPS) Jamie Resker, Practice Leader and Founder of Employee Performance Solutions, is a recognized innovator in performance management. She is the originator of the-the Performance Continuum Feedback Method® and Conversations to Optimize Employee Performance training program; tools and training that reshape communications between managers and employees to drive and align performance. Jamie is on the faculty for the Northeast Human Resources Association, is a contributor to Halogen Software's Talent Space Blog, and is an editorial advisory board member for HR Examiner. Teala Wilson - Senior Consultant, Strategic Services, Saba Software Teala is a Talent Management Consultant at Halogen Software, now a part of Saba Software. She has worked with teams on a national and global level supporting human resources in areas such as performance management, recruitment, employee benefit programs, training and talent development, workforce planning and internal communications. Teala also has a personal passion for visual arts and design. Want to learn more? Join us for an upcoming Product Tour! http://bit.ly/2yitfqu

Good Stuff Happens in 1:1 Meetings: Why you need them and how to do them well

Saba Software

Featured (20)