Data Science Methodology

所在平台: Udemy

课程主页: https://www.udemy.com/course/data-science-methodology/

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课程名称:数据科学方法论 课程概述:数据科学起源于商业智能(BI),该领域在90年代变得流行。但在过去20年中,我们在人工智能的应用方面取得了前所未有的进展。在将BI方法论应用于人工智能的过程中,这些方法论需要适应模型部署和机器学习的新需求。如今的数据科学工作主要涉及大数据,面临三大挑战:如何处理大量数据、理解数据和数据准备。 当前的大数据环境中,我们必须处理的数据量庞大,以往依赖于小样本进行分析的商业智能方法不再完全适用,因为大数据提供了足够的样本进行分析,但偏差和异常值却成为了真正的问题。此外,数据以高速度流动,数据科学技术提供了实时分析能力,使得在用户与产品互动时,能够实时嵌入见解,提供帮助。同时,数据多样性成为一大关键,包括语音、非结构化文本和视频等,理解和解析这些类型的数据已成为数据科学的核心任务。 课程将介绍一个七步数据科学/人工智能驱动的项目方法论: 第1步:理解用例 - 通过实例和案例研究展示数据科学的价值,制定用例和目标的策略。 第2步:理解数据 - 定义大数据的特征以及如何选择合适的数据源。 第3步:数据准备 - 如何选择、清理和构建大数据以适应数据建模。 第4步:模型开发 - 如何从多种来源构建模型,利用AI和分析获得数据见解。 第5步:模型评估 - 如何与用户互动并评估决策,模型需要的测量指标。 第6步:模型部署 - 如何部署AI模型并应用生产使用中的学习来增强模型。 第7步:模型优化 - 如何根据生产使用中的反馈调整和优化模型,确保使用中不产生偏差或破坏。 如果你是一名开发人员,想学习如何使用Python进行数据科学项目,我们还设计了另一门课程《使用Python进行数据科学实战》。

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Data Science grew through our experiences with Business Intelligence or BI, a field that became popular in 1990s. However, the last 20 years have seen unprecedented improvement in our ability to take actions using Artificial Intelligence. As we adopt the BI methodologies to AI deployments, how will these methodologies morph to add considerations needed for model deployment, and machine learning.Today's Data Science work deals with big data. It introduces three major challenges:How to deal with large volumes of data. Data understanding and data preparation must deal with large scale observations about the population. In the world of BI on small samples, the art of data science was to find averages and trends using a sample and then projecting it using universal population measures such as census to project to the overall population. Most of the big data provides significant samples where such a projection may not be needed. However, bias and outliers become the real issuesData is now available in high velocity. Using scoring engines, we can embed insights into high velocity. Data Science techniques offer significant real-time analytics techniques to make it possible. As you interact with a web site or a product, the marketer or services teams can provide help to you as a user. This is due to insight embedded in high velocity.Most of the data is in speech, unstructured text or videos. This is high variety. How do we interpret an image of a driver license and extract driver license. Understanding and interpreting such data is now a central part of data science.As these deployed models ingest learning in real-time and adjust their models, it is important to monitor their performance for biases and inaccuracies. We need measurement and monitoring that is no longer project-based one-time activity. It is continuous, automated, and closely monitored. The methodology must be extended to include continuous measurement and monitoring.The course describes 7 steps methodology for conducting data science /AI driven engagement.Step 1: Understand Use Case - We use illustrative examples and case studies to show the power of data science engagement and will provide strategies for defining use case and data science objectives.Step 2: Understand Data - We will define various characteristics of big data and how one should go about understanding and selecting right data sources for a use case from data science perspectiveStep 3: Prepare Data - How should one go about selecting, cleaning and constructing big data for data modeling purposes using analytics or AI techniquesStep 4: Develop Model - Once you have ingested structured and un-structured data from many sources, how do you go about building models to gain data insights using AI and AnalyticsStep 5: Evaluate Model - How do you engage users and evaluate decisions? What measurements do you need on models?Step 6: Deploy Model- How do you deploy your AI models and apply learning of AI system from production use for enhancing your model.Step 7: Optimize Model - How would you fine-tune the model and optimize its performance over time using feedback from production use? What guide rails would you need to make sure field use does not result in biases or sabotage.If you are a developer and are interested in learning how to do a data science project using Python, we have designed another course titled "Data Science in Action using Python".

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