中国掌控全球约82%的钨矿产量，作为全球最大的钨资源国和供应国，对钨矿实行严格的开采总量控制，2025年钨矿开采总量为6.7万吨，从源头限制了供给的弹性。国金证券在研报中指出，2025年中国钨精矿开采总量控制第一批指标同比缩减6.5%，叠加环保及安全督查严格限制表外钨矿山产出，有效供给持续收缩。
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Output from Sanger and Coulson’s Plus-Minus method. Credit: Sanger & Coulson, J. Mol. Biol. (1975).，推荐阅读爱思助手下载最新版本获取更多信息
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There are a couple ways mitigate this drawback, both of which are outside the scope of this article. One is “garbage collection”: pruning tombstones from CRDTs, which prevents you from merging states with any changes made before the tombstones were removed. Another is creating an efficient format to encode the data. You can also combine these methods. Research suggests that this can result in as little as 50% overhead compared to the “plain” data CRDTs: The Hard Parts A talk on the latest research on CRDTs, originally given at the Hydra distributed computing conference on 6 July 2020.References: https://martin.kleppmann.co... youtu.be/x7drE24geUw?t=3587 . If you’d like to skip ahead and see some of this optimization in action, check out the final part in this series: Making CRDTs 98% More Efficient Making CRDTs 98% More Efficient | jakelazaroff.com State-based CRDTs grow monotonically, but that doesn't mean they can't be efficient. We'll learn how to compress the pixel editor state by 98%. jakelazaroff.com/words/making-crdts-98-percent-more-efficient/ . ↩