对于所有数据工程新手来说，了解数据工程的基础知识至关重要。本文将是您进一步学习数据工程的跳板。 数据工程是每家数据驱动型公司的基石。从数据收集到决策，几乎所有数据使用步骤都依赖于数据工程。它堪称现代公司的 血液。数据流？没错，创建数据流正是数据工程师的工作之一。但我们先别急，先从基础开始。我们先来定义一下数据工 程，然后再详细讨论它的基本组成部分。 一 数据工程的定义 数据工程是设计、构建和维护系统的过程，该系统可以收集数据、存储数据、分析数据并基于数据做出决策。 这是所谓的"数据提供者"的工作之一，因为其目的是让其他数据用户（例如数据分析师、数据科学家、机器学习工程师）能 够访问数据，同时确保数据质量、准确性和格式适用性。 二 数据工程的基础知识 只有了解数据工程的基本原理才能更好地理解数据工程。 基础1：数据源和数据获取 数据工程师通常从许多不同的来源提取数据，并将其存储在一个地方，例如数据仓库。这个过程称为 数据提取 。 有几种不同类型的数据源、数据提取方法和工具。 数据源类型 根据数据类型，数据源可分为以下三类之一。 1.结构化数据源 结构化是指数据遵循预定义的模式，该模式将数据组织在由行和列组成的表 ...

Archer Aviation - Archer Aviation is focused on developing electric takeoff and landing vehicles (eVTOL) and aims to establish urban air taxi networks globally, despite currently having no measurable revenue [1][3] - The company is selling its Midnight eVTOL for $5 million, which raises concerns about the long payback period compared to competitors like Uber Technologies [2] - Archer's eVTOL can only carry four passengers, making its capacity comparable to conventional ride-sharing vehicles, which may limit its efficiency [3] - The current market capitalization of Archer Aviation stands at $5.5 billion, reflecting investor optimism despite the challenges faced [3] Innodata - Innodata is a small-cap stock benefiting from the artificial intelligence (AI) boom, specializing in data labeling and engineering for AI model training [6] - The company reported a 120% increase in revenue to $58.3 million in the first quarter, with adjusted EBITDA rising from $3.8 million to $12.7 million, driven by onboarding major new customers [7] - Innodata has a market cap of $1.6 billion and would need to increase by over 200% to match Archer's market cap, but it is well-positioned for growth [8] Green Brick Partners - Green Brick Partners has shown resilience in a challenging housing market, reporting an 11% revenue growth to $497.6 million in the first quarter, with a gross margin of 31.2% and a net income of $75 million [9] - The company differentiates itself by owning and developing lots in high-growth markets like Dallas and Atlanta, maintaining a low debt-to-capital ratio [10] - Green Brick's stock has increased over 400% in the last five years and trades at a price-to-earnings ratio of 7, indicating potential for further growth as housing demand is expected to improve [11][12]