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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

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1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Finite rotation？

Definition 12.12 University Earth and Space Sciences — Year 1 · 第 12 章 — Plate Kinematics on a Sphere

A finite rotation is the rotation of the sphere, given by a pole (latitude, longitude) and an angle, that carries a plate, or a piece of its edge, from its present position to its position at a given time relative to another plate. A positive angle turns anticlockwise seen from above the pole.

Closing the South Atlantic. South America (black outline) is carried back relative to Africa by two published finite rotations: to its position at 83.5\, Ma (pole 61.88 N, 34.26 W, angle 33.51; dashed) and at 120.6\, Ma, as the ocean began to open (pole 51.28 N, 33.67 W, angle 52.35; red). The dotted line is the path of Recife on its small circle about the older pole. Latitude and longitude are drawn as a square grid, which stretches shapes away from the equator. Coastlines: Natural Earth. — Closing the South Atlantic. South America (black outline) is carried back relative to Africa by two published finite rotations: to its position at $83.5\,\mathrm{Ma}$ (pole $61.88{}^{\circ}$ N, $34.26{}^{\circ}$ W, angle $33.51{}^{\circ}$ ; dashed) and at $120.6\,\mathrm{Ma}$ , as the ocean began to open (pole $51.28{}^{\circ}$ N, $33.67{}^{\circ}$ W, angle $52.35{}^{\circ}$ ; red). The dotted line is the path of Recife on its small circle about the older pole. Latitude and longitude are drawn as a square grid, which stretches shapes away from the equator. Coastlines: Natural Earth.

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