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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 Compaction, decompaction？

又称： compaction · decompaction

Definition 23.2 University Earth and Space Sciences — Year 1 · 第 23 章 — Diagenesis and Sedimentary Basins

Compaction is the loss of volume of a sediment under the weight of the sediments above it, by the closer packing of its grains, the expulsion of its pore water and, deeper, the dissolution of grains where they touch. Decompaction is the calculation that restores a buried layer to the thickness it had at an earlier, shallower burial, most often at the surface, when it was laid down.

Left: porosity against depth by Athy’s law for sandstone, shale and chalk, with the parameters of . Right: 500\, m of shale between 3000\, m and 3500\, m, and the same layer decompacted to the surface: the grains (440\, m) are kept, the water is not. — Left: porosity against depth by Athy’s law for sandstone, shale and chalk, with the parameters of Table 23.1. Right: $500\,\mathrm{m}$ of shale between $3000\,\mathrm{m}$ and $3500\,\mathrm{m}$ , and the same layer decompacted to the surface: the grains ( $440\,\mathrm{m}$ ) are kept, the water is not.

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