Bourne Young

请问单位四元数点乘等于其夹角的余弦值, 可以添加证明吗?

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“因为 𝑞0 与 𝑞1 都是单位四元数，𝑞0 · 𝑞1 正好是这两个四元数在 4D 空间中夹 角的余弦值”, 这句在三维的情况下成立, 四维的情况, 是不是需要添加个证明? 谢谢!

Subtitle button is missing after download video

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- Version of macOS: 10.15.7 - Version of the app: 7.3.3 - What were you trying to do when the issue happened After download video ![Screen Shot 2021-06-08 at 8...

in queue build will fail if the merge request is merged.

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``` Started by upstream project "CCS-Merge-Auto-CI" build number 186 originally caused by: Gitlab Merge Request #527 :forkRepo => RC2 Building remotely on 192.168.13.57-Mac (mac) in workspace /Users/jenkins/Public/jenkins/workspace/CCS-Merge-Auto-CI/label/mac > git rev-parse...

无法解析Tag了。

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``` FATAL Something's wrong. Maybe you can find the solution here: http://hexo.io/docs/troubleshooting.html TypeError: data.setTags is not a function at read_tags (/Users/young40/Work/www.young40.com/node_modules/hexo-renderer-org/lib/read-info.js:48:12) at read_all (/Users/young40/Work/www.young40.com/node_modules/hexo-renderer-org/lib/read-info.js:78:5) at Hexo.read_info (/Users/young40/Work/www.young40.com/node_modules/hexo-renderer-org/lib/read-info.js:10:3) at Hexo.tryCatcher (/Users/young40/Work/www.young40.com/node_modules/bluebird/js/release/util.js:16:23)...

How to read info?

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I have a different keyboard. ThinkPad 4X30K12182 Vendor ID: 0x17EF Product ID: 0x6083 so I want to read the value of the keyboard, in case something is wrong, I can...

What should I do when I got this numbers?

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I got my trace-out.txt with this: ``` 25 154.304 3 0.25 6 0.221 9 0.183 12 0.175 15 0.172 25 0.213 26 0.165 26 279.552 25 640.975 2 0.246 4...

resign faild

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iPhone Developer: **_: ambiguous (matches "iPhone Developer: ***_" and "iPhone Developer: ****" in /Users/young40/Library/Keychains/login.keychain) /var/folders/l_/6pd2mcnx28j0fr6b1s1gfl2h0000gn/T/com.appulize.iresign/Payload/战舰帝国_PP.app: invalid Info.plist (plist or signature have been modified) In architecture: armv7

选字的匹配问题

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我使用的字典是pyim-greatdict.pyim里面有 xing-qie 行窃 行且 行箧 幸惬 xing-qi-er 星期二 现在输入"xingqier"是, 提示的第一个是"行窃日", 而不是"星期二", 是不是在有精确匹配的情况下, 可以改进一下呢? 谢谢.