data science -移花宫 -武林禁地，闲人禁止入内

LinkedIn Learning - Data Science Foundations Fundamentals [CoursesGhar]

[3] 2. The Place of Data Science in the Data Universe/[3] Deep learning neural networks.mp4 32.0 MB
[3] 2. The Place of Data Science in the Data Universe/[2] Machine learning.mp4 31.4 MB
[5] 4. Sources of Data/[5] Scraping data.mp4 31.2 MB
[3] 2. The Place of Data Science in the Data Universe/[1] Artificial intelligence.mp4 31.0 MB
[9] 8. Analyses for Data Science/[2] Predictive models.mp4 25.7 MB
[6] 5. Sources of Rules/[2] The derivation of rules from data analysis.mp4 25.0 MB
[2] 1. What Is Data Science/[3] The data science pathway.mp4 24.4 MB
[9] 8. Analyses for Data Science/[1] Descriptive analyses.mp4 24.3 MB
[5] 4. Sources of Data/[3] Open data.mp4 21.5 MB
[9] 8. Analyses for Data Science/[7] Dimensionality reduction.mp4 20.4 MB
[9] 8. Analyses for Data Science/[3] Trend analysis.mp4 20.1 MB
[9] 8. Analyses for Data Science/[4] Clustering.mp4 19.3 MB
[9] 8. Analyses for Data Science/[9] Validating models.mp4 19.1 MB
[9] 8. Analyses for Data Science/[6] Anomaly detection.mp4 19.1 MB
[9] 8. Analyses for Data Science/[8] Feature selection and creation.mp4 17.7 MB
[7] 6. Tools for Data Science/[1] Applications for data analysis.mp4 15.9 MB
[9] 8. Analyses for Data Science/[10] Aggregating models.mp4 15.8 MB
[5] 4. Sources of Data/[1] Data preparation.mp4 15.7 MB
[3] 2. The Place of Data Science in the Data Universe/[4] Big data.mp4 15.6 MB
[8] 7. Mathematics for Data Science/[1] Algebra.mp4 15.6 MB

[磁力链接] 添加时间:2022-02-06 大小:737.7 MB 最近下载:2025-05-29 热度:1779

Data Science Foundations Fundamentals- [UdemyCourseDownloader]

03 The Place of Data Science in the Data Universe/003 Deep learning neural networks.mp4 32.0 MB
03 The Place of Data Science in the Data Universe/002 Machine learning.mp4 31.4 MB
05 Sources of Data/005 Scraping data.mp4 31.2 MB
03 The Place of Data Science in the Data Universe/001 Artificial intelligence.mp4 31.0 MB
09 Analyses for Data Science/002 Predictive models.mp4 25.7 MB
06 Sources of Rules/002 The derivation of rules from data analysis.mp4 25.0 MB
02 What Is Data Science_/003 The data science pathway.mp4 24.4 MB
09 Analyses for Data Science/001 Descriptive analyses.mp4 24.3 MB
05 Sources of Data/003 Open data.mp4 21.5 MB
09 Analyses for Data Science/007 Dimensionality reduction.mp4 20.4 MB
09 Analyses for Data Science/003 Trend analysis.mp4 20.1 MB
09 Analyses for Data Science/004 Clustering.mp4 19.3 MB
09 Analyses for Data Science/009 Validating models.mp4 19.1 MB
09 Analyses for Data Science/006 Anomaly detection.mp4 19.1 MB
09 Analyses for Data Science/008 Feature selection and creation.mp4 17.7 MB
07 Tools for Data Science/001 Applications for data analysis.mp4 15.9 MB
09 Analyses for Data Science/010 Aggregating models.mp4 15.8 MB
05 Sources of Data/001 Data preparation.mp4 15.7 MB
03 The Place of Data Science in the Data Universe/004 Big data.mp4 15.6 MB
08 Mathematics for Data Science/001 Algebra.mp4 15.6 MB

[磁力链接] 添加时间:2021-03-12 大小:737.6 MB 最近下载:2025-03-26 热度:107

[ FreeCourseWeb.com ] Python required for Data Science and Machine Learning 2020.zip

[ FreeCourseWeb.com ] Python required for Data Science and Machine Learning 2020.zip 736.8 MB

[磁力链接] 添加时间:2022-03-21 大小:736.8 MB 最近下载:2025-05-17 热度:403

[ FreeCourseWeb.com ] Linkedin - Hands-On Data Science - 2 Sales Dashboard with Tableau

~Get Your Files Here !/[2] 1. Sales Dashboard with Tableau/[1] Exploring data visually in Tableau.mp4 243.0 MB
~Get Your Files Here !/[2] 1. Sales Dashboard with Tableau/[2] Building a dashboard.mp4 200.2 MB
~Get Your Files Here !/[2] 1. Sales Dashboard with Tableau/[3] Sharing on Tableau Public.mp4 194.4 MB
~Get Your Files Here !/[1] Introduction/[1] Tableau setup.mp4 91.6 MB
~Get Your Files Here !/Ex_Files_Hands_On_Data_Sci_2/Exercise Files/3.2-VisualExploration.twbx 2.7 MB
~Get Your Files Here !/Ex_Files_Hands_On_Data_Sci_2/Exercise Files/3.3-BuildingDashboards.twbx 2.6 MB
~Get Your Files Here !/Ex_Files_Hands_On_Data_Sci_2/Exercise Files/Customer Analysis Demo.twbx 373.3 kB
~Get Your Files Here !/[2] 1. Sales Dashboard with Tableau/[2] Building a dashboard.srt 41.1 kB
~Get Your Files Here !/[2] 1. Sales Dashboard with Tableau/[1] Exploring data visually in Tableau.srt 37.1 kB
~Get Your Files Here !/[1] Introduction/[1] Tableau setup.srt 13.8 kB
~Get Your Files Here !/Bonus Resources.txt 357 Bytes
Get Bonus Downloads Here.url 183 Bytes

[磁力链接] 添加时间:2022-02-03 大小:735.0 MB 最近下载:2025-05-30 热度:2489

[ TutPig.com ] Udemy - Guide to Careers in Data Science - Interview Hacks (2021)

~Get Your Files Here !/6. Expertise & Readiness/3. Do's and Don'ts of Preparation.mp4 30.1 MB
~Get Your Files Here !/1. Introduction/1. Course Overview.mp4 28.4 MB
~Get Your Files Here !/3. Data Science Job Outline/3. Job Titles in Data Science.mp4 23.8 MB
~Get Your Files Here !/7. The Interview/2. 4 Mantras for Guaranteed Success.mp4 21.4 MB
~Get Your Files Here !/3. Data Science Job Outline/1. Why choose a Career in Data Science.mp4 18.8 MB
~Get Your Files Here !/4. Creating an Effective Resume/1. Important Elements to focus on.mp4 15.6 MB
~Get Your Files Here !/10. Machine Learning Questions and Answers/1. Question and Answer 1.mp4 15.5 MB
~Get Your Files Here !/3. Data Science Job Outline/6. Framework of a Typical Data Science Project.mp4 14.7 MB
~Get Your Files Here !/14. Guesstimation Questions and Answers/2. Question and Answer 2.mp4 14.5 MB
~Get Your Files Here !/16. Tricky Questions and Answers/5. Question and Answer 5.mp4 13.4 MB
~Get Your Files Here !/5. Efficiently searching Data Science job/3. Getting Referrals.mp4 12.5 MB
~Get Your Files Here !/9. Probability Questions and Answers/9. Question and Answer 9.mp4 11.8 MB
~Get Your Files Here !/16. Tricky Questions and Answers/1. Question and Answer 1.mp4 11.2 MB
~Get Your Files Here !/5. Efficiently searching Data Science job/4. PRO Tip.mp4 11.0 MB
~Get Your Files Here !/14. Guesstimation Questions and Answers/1. Question and Answer 1.mp4 10.9 MB
~Get Your Files Here !/4. Creating an Effective Resume/4. Negative Elements.mp4 10.4 MB
~Get Your Files Here !/14. Guesstimation Questions and Answers/3. Question and Answer 3.mp4 9.9 MB
~Get Your Files Here !/8. Statistics Questions and Answers/5. Question and Answer 5.mp4 9.8 MB
~Get Your Files Here !/15. Puzzles/4. Puzzle 4 with Answer.mp4 9.4 MB
~Get Your Files Here !/9. Probability Questions and Answers/4. Question and Answer 4.mp4 9.3 MB

[磁力链接] 添加时间:2023-12-24 大小:725.0 MB 最近下载:2025-05-30 热度:1408

[ FreeCourseWeb.com ] Udemy - Google Spreadsheets - Database Tools for Data Science.zip

[ FreeCourseWeb.com ] Udemy - Google Spreadsheets - Database Tools for Data Science.zip 718.8 MB

[磁力链接] 添加时间:2021-03-08 大小:718.8 MB 最近下载:2025-05-28 热度:564

[ DevCourseWeb.com ] Udemy - Starting a Career in Data Science 101

~Get Your Files Here !/004 Acquiring data science skills.mp4 124.6 MB
~Get Your Files Here !/005 Creating a portfolio.mp4 96.7 MB
~Get Your Files Here !/006 Finding the right job.mp4 91.4 MB
~Get Your Files Here !/007 Preparing your resume and cover letter.mp4 81.3 MB
~Get Your Files Here !/009 Accepting the offer.mp4 78.2 MB
~Get Your Files Here !/002 Data science areas.mp4 77.9 MB
~Get Your Files Here !/008 Passing the interview.mp4 65.2 MB
~Get Your Files Here !/001 What is data science.mp4 62.2 MB
~Get Your Files Here !/003 Picking data science area.mp4 38.9 MB
~Get Your Files Here !/004 Acquiring data science skills_en.vtt 9.7 kB
~Get Your Files Here !/005 Creating a portfolio_en.vtt 8.8 kB
~Get Your Files Here !/007 Preparing your resume and cover letter_en.vtt 8.0 kB
~Get Your Files Here !/006 Finding the right job_en.vtt 8.0 kB
~Get Your Files Here !/002 Data science areas_en.vtt 7.7 kB
~Get Your Files Here !/009 Accepting the offer_en.vtt 7.5 kB
~Get Your Files Here !/008 Passing the interview_en.vtt 7.1 kB
~Get Your Files Here !/001 What is data science_en.vtt 6.2 kB
~Get Your Files Here !/003 Picking data science area_en.vtt 3.3 kB
~Get Your Files Here !/Bonus Resources.txt 386 Bytes
Get Bonus Downloads Here.url 182 Bytes

[磁力链接] 添加时间:2022-05-03 大小:716.5 MB 最近下载:2025-05-24 热度:1025

[ DevCourseWeb.com ] Oreilly - Python for Data Science with Colab and Pandas in One Hour Video Course.zip

[ DevCourseWeb.com ] Oreilly - Python for Data Science with Colab and Pandas in One Hour Video Course.zip 707.1 MB

[磁力链接] 添加时间:2022-04-22 大小:707.1 MB 最近下载:2025-05-31 热度:2642

[ TutGator.com ] Coursera - Data Science Fundamentals with Python and SQL Specialization.zip

[ TutGator.com ] Coursera - Data Science Fundamentals with Python and SQL Specialization.zip 706.6 MB

[磁力链接] 添加时间:2022-01-11 大小:706.6 MB 最近下载:2025-05-31 热度:2782

[ FreeCourseWeb.com ] Coursera - Data Science Fundamentals with Python and SQL.zip

[ FreeCourseWeb.com ] Coursera - Data Science Fundamentals with Python and SQL.zip 706.6 MB

[磁力链接] 添加时间:2024-04-11 大小:706.6 MB 最近下载:2025-05-31 热度:1270

Learning Python for Data Science [Video]

4.Data Preparation and Manipulation with Pandas/13.Read in Data Files.mp4 108.4 MB
1.Beginning the Data Science Journey/02.What Is Data Science.mp4 29.1 MB
1.Beginning the Data Science Journey/03.Python Data Science Ecosystem.mp4 4.7 MB
2.Introducing Jupyter/04.Installing Anaconda.mp4 2.7 MB
2.Introducing Jupyter/05.Starting Jupyter.mp4 10.5 MB
2.Introducing Jupyter/06.Basics of Jupyter.mp4 4.2 MB
2.Introducing Jupyter/07.Markdown Syntax.mp4 5.0 MB
3.Understanding Numerical Operations with NumPy/08.1D Arrays with NumPy.mp4 14.9 MB
3.Understanding Numerical Operations with NumPy/09.2D Arrays with NumPy.mp4 25.1 MB
3.Understanding Numerical Operations with NumPy/10.Functions in NumPy.mp4 21.7 MB
3.Understanding Numerical Operations with NumPy/11.Random Numbers and Distributions in NumPy.mp4 17.4 MB
4.Data Preparation and Manipulation with Pandas/12.Create DataFrames.mp4 67.4 MB
1.Beginning the Data Science Journey/01.The Course Overview.mp4 3.8 MB
4.Data Preparation and Manipulation with Pandas/14.Subsetting DataFrames.mp4 13.2 MB
4.Data Preparation and Manipulation with Pandas/15.Boolean Indexing in DataFrames.mp4 12.6 MB
4.Data Preparation and Manipulation with Pandas/16.Summarizing and Grouping Data.mp4 14.9 MB
5.Visualizing Data with Matplotlib and Seaborn/17.Matplotlib Introduction.mp4 23.4 MB
5.Visualizing Data with Matplotlib and Seaborn/18.Graphs with Matplotlib.mp4 16.4 MB
5.Visualizing Data with Matplotlib and Seaborn/19.Graphs with Seaborn.mp4 31.3 MB
5.Visualizing Data with Matplotlib and Seaborn/20.Graphs with Pandas.mp4 21.0 MB

[磁力链接] 添加时间:2018-08-03 大小:705.8 MB 最近下载:2025-05-28 热度:1737

[ FreeCourseWeb.com ] Udemy - Python Beautiful Soup Web scraping for Data Science Projects.zip

[ FreeCourseWeb.com ] Udemy - Python Beautiful Soup Web scraping for Data Science Projects.zip 696.9 MB

[磁力链接] 添加时间:2021-04-03 大小:696.9 MB 最近下载:2025-05-31 热度:1301

Apache Spark with Python - Learn Data Science Power Tools

spark-python.tgz 695.9 MB
Torrent downloaded from demonoid.pw.txt 46 Bytes
Torrent Downloaded From ExtraTorrent.cc.txt 352 Bytes

[磁力链接] 添加时间:2017-02-28 大小:695.9 MB 最近下载:2025-05-31 热度:1486

[Coursera] IBM Data Science Professional Certificate

04_data-literacy-for-data-science-optional/01_understanding-data/01_04_viewpoints-working-with-varied-data-sources-and-types.mp4 58.9 MB
04_data-literacy-for-data-science-optional/02_data-literacy/02_06_viewpoints-considerations-for-choice-of-data-repository.mp4 43.8 MB
03_applications-and-careers-in-data-science/02_careers-and-recruiting-in-data-science/02_03_recruiting-for-data-science.mp4 42.8 MB
02_data-science-topics/02_deep-learning-and-machine-learning/02_04_neural-networks-and-deep-learning.mp4 33.1 MB
02_data-science-topics/01_big-data-and-data-mining/01_07_what-is-hadoop.mp4 32.8 MB
03_applications-and-careers-in-data-science/02_careers-and-recruiting-in-data-science/02_05_importance-of-mathematics-and-statistics-for-data-science.mp4 30.2 MB
03_applications-and-careers-in-data-science/02_careers-and-recruiting-in-data-science/02_02_how-can-someone-become-a-data-scientist.mp4 25.2 MB
01_defining-data-science-and-what-data-scientists-do/03_what-do-data-scientists-do/03_03_data-science-skills-big-data.mp4 22.2 MB
02_data-science-topics/02_deep-learning-and-machine-learning/02_05_applications-of-machine-learning.mp4 21.7 MB
02_data-science-topics/01_big-data-and-data-mining/01_06_data-science-and-big-data.mp4 19.7 MB
01_defining-data-science-and-what-data-scientists-do/03_what-do-data-scientists-do/03_05_data-science-topics-and-algorithms.mp4 19.0 MB
01_defining-data-science-and-what-data-scientists-do/03_what-do-data-scientists-do/03_02_a-day-in-the-life-of-a-data-scientist.mp4 17.9 MB
01_defining-data-science-and-what-data-scientists-do/02_defining-data-science/02_04_the-many-paths-to-data-science.mp4 16.3 MB
02_data-science-topics/01_big-data-and-data-mining/01_05_foundations-of-big-data.mp4 15.4 MB
04_data-literacy-for-data-science-optional/01_understanding-data/01_03_data-sources.mp4 14.5 MB
01_defining-data-science-and-what-data-scientists-do/02_defining-data-science/02_05_advice-for-new-data-scientists.mp4 13.6 MB
04_data-literacy-for-data-science-optional/02_data-literacy/02_04_nosql.mp4 13.4 MB
03_applications-and-careers-in-data-science/01_data-science-application-domains/01_02_how-should-companies-get-started-in-data-science.mp4 12.9 MB
04_data-literacy-for-data-science-optional/02_data-literacy/02_03_relational-database-management-system.mp4 12.6 MB
02_data-science-topics/01_big-data-and-data-mining/01_03_introduction-to-cloud.mp4 12.5 MB

[磁力链接] 添加时间:2024-04-19 大小:691.1 MB 最近下载:2025-06-01 热度:12486

O'Reilly - Building Data Science Teams

01. Building Data Science Teams/01_01-Introduction Building Data Science Teams.mp4 13.6 MB
01. Building Data Science Teams/01_02-Why are we here.mp4 139.5 MB
01. Building Data Science Teams/01_03-Preparing your organization.mp4 71.0 MB
01. Building Data Science Teams/01_04-Hire the team.mp4 140.2 MB
01. Building Data Science Teams/01_05-Team Matrix.mp4 168.3 MB
01. Building Data Science Teams/01_06-Organization and Process.mp4 79.6 MB
01. Building Data Science Teams/01_07-Miscellaneous Caveats.mp4 76.0 MB

[磁力链接] 添加时间:2017-04-23 大小:688.2 MB 最近下载:2025-05-23 热度:565

Packt - Python Data Science Essentials

2.Data Munging/07.Data Loading and Preprocessing.mp4 73.4 MB
1.First Step/02.Introducing Data Science and Python.mp4 6.1 MB
1.First Step/03.Getting Ready.mp4 13.8 MB
1.First Step/04.A Glance at the Essential Packages.mp4 6.4 MB
1.First Step/05.Introducing the Jupyter Notebook.mp4 46.5 MB
1.First Step/06.Scikit-learn Toy Datasets.mp4 52.7 MB
1.First Step/01.The Course Overview.mp4 12.8 MB
2.Data Munging/08.Working with Categorical and Text Data.mp4 45.0 MB
2.Data Munging/09.Creating NumPy Arrays.mp4 45.2 MB
2.Data Munging/10.NumPy's Fast Operations and Computations.mp4 19.8 MB
3.The Data Pipeline/11.Introducing EDA.mp4 15.0 MB
3.The Data Pipeline/12.Building New Features.mp4 17.2 MB
3.The Data Pipeline/13.Dimensionality Reduction.mp4 29.3 MB
3.The Data Pipeline/14.The Detection and Treatment of Outliers.mp4 25.6 MB
3.The Data Pipeline/15.Validation Metrics.mp4 26.0 MB
3.The Data Pipeline/16.Testing and Validating.mp4 27.2 MB
3.The Data Pipeline/17.Cross-Validation.mp4 27.1 MB
3.The Data Pipeline/18.Hyperparameter Optimization.mp4 27.1 MB
3.The Data Pipeline/19.Feature Selection.mp4 22.7 MB
3.The Data Pipeline/20.Wrapping Everything in a Pipeline.mp4 26.0 MB

[磁力链接] 添加时间:2018-07-29 大小:682.0 MB 最近下载:2025-05-30 热度:1848

[ FreeCourseWeb.com ] Complete Python Course with Machine Learning & Data Science.zip

[ FreeCourseWeb.com ] Complete Python Course with Machine Learning & Data Science.zip 678.1 MB

[磁力链接] 添加时间:2021-05-10 大小:678.1 MB 最近下载:2025-05-20 热度:95

[ FreeCourseWeb.com ] Lynda - Python for Data Science Essential Training Part 1.zip

[ FreeCourseWeb.com ] Lynda - Python for Data Science Essential Training Part 1.zip 677.0 MB

[磁力链接] 添加时间:2021-03-23 大小:677.0 MB 最近下载:2025-05-23 热度:1128

Data Science Foundations Data Mining in Python

[TutsNode.com] - Data Science Foundations Data Mining in Python/7. Validating results.mp4 29.7 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/15. Clustering overview.mp4 29.4 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/22. Classification overview.mp4 27.2 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/39. ARIMA.mp4 27.0 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/4. Tools for data mining.mp4 26.3 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/8. Dimensionality reduction overview.mp4 25.1 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/29. Association analysis overview.mp4 19.4 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/40. MLP.mp4 18.7 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/5. The CRISP-DM data mining model.mp4 18.6 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/18. K-means.mp4 18.4 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/43. Text mining overview.mp4 18.2 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/6. Privacy, copyright, and bias.mp4 18.0 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/36. Time-series mining.mp4 17.6 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/31. Apriori.mp4 16.9 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/9. Handwritten digits dataset.mp4 16.0 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/45. Sentiment analysis- Binary classification.mp4 15.7 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/32. Eclat.mp4 15.4 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/50. Next steps.mp4 14.9 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/35. Solution- Apriori.mp4 14.8 MB
[TutsNode.com] - Data Science Foundations Data Mining in Python/12. t-SNE.mp4 14.1 MB

[磁力链接] 添加时间:2022-01-13 大小:669.5 MB 最近下载:2025-06-01 热度:3537

[ DevCourseWeb.com ] Deep Dive Into Mastering Data Science And Machine Learning

~Get Your Files Here !/21 - Covariance and Correlation.mp4 60.1 MB
~Get Your Files Here !/25 - Hierarchical Indexing.mp4 50.9 MB
~Get Your Files Here !/8 - DataFrame.mp4 50.1 MB
~Get Your Files Here !/19 - Functions by Element and Row or Column and Statistics.mp4 44.3 MB
~Get Your Files Here !/20 - Ranking and Sorting.mp4 42.5 MB
~Get Your Files Here !/14 - Reindexing.mp4 35.9 MB
~Get Your Files Here !/16 - Arithmetic and Data Alignment.mp4 34.9 MB
~Get Your Files Here !/13 - Methods and Duplicate Labels.mp4 30.3 MB
~Get Your Files Here !/23 - NaN Value Filtration.mp4 28.6 MB
~Get Your Files Here !/9 - Selecting Elements.mp4 25.7 MB
~Get Your Files Here !/12 - Nested Dict and Transposition.mp4 24.6 MB
~Get Your Files Here !/7 - Dictionaries and Operations between Series.mp4 24.3 MB
~Get Your Files Here !/5 - Mathematical Functions and Evaluating Values.mp4 23.4 MB
~Get Your Files Here !/2 - Welcome to the Series.mp4 23.0 MB
~Get Your Files Here !/15 - Dropping.mp4 23.0 MB
~Get Your Files Here !/10 - Assigning Values.mp4 22.1 MB
~Get Your Files Here !/18 - DataFrame and Series and Operations.mp4 20.4 MB
~Get Your Files Here !/11 - Value Membership Deleting and Filtering.mp4 16.3 MB
~Get Your Files Here !/6 - NaN Values.mp4 14.1 MB
~Get Your Files Here !/22 - Assigning a NaN Value.mp4 13.6 MB

[磁力链接] 添加时间:2024-01-07 大小:663.7 MB 最近下载:2025-05-31 热度:1477