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--- | ||
layout: post | ||
title: 突尼西亚上空的银河 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 天文 | ||
--- | ||
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突尼西亚上空的银河 | ||
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影像提供与版权: Makrem Larnaout | ||
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![](https://pic.imgdb.cn/item/66b0d4d9d9c307b7e9843614.jpg) | ||
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说明:当时天空无月。地面有座落在突尼西亚的拉斯家园。 | ||
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天空的光带也不是寻常的星系,而是银河系的中央盘面。最后,那道亮纹不是常见的流星,而极可能是去年英仙流星雨的火流星。 | ||
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这幅主题影像,组合自同部相机在同一地点连续拍摄的系列照片。今年英仙流星雨的极大期将落在这个周末,预期在上弦月西落后的子夜附近,会迎来最多的流星。 | ||
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如想要好好的观赏流星雨,应找个有清朗和幽暗天空的地点,并备妥舒适的座椅和耐心。 | ||
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(LarsHomestead 拉斯家园;星际大战电影主角路克的家园) |
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--- | ||
layout: post | ||
title: Play 商店突然停止提供完整 APK 包 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- Play | ||
--- | ||
根据 APK 提供网站 APKMirrors 的最新消息,谷歌 Play 商店已突然停止提供完整安卓应用 APK 包,将影响一些应用的侧载安装。 | ||
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![](https://pic.imgdb.cn/item/66b0e79cd9c307b7e997123c.jpg) | ||
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谷歌自 2021 年 8 月起推行新的 Android App Bundle(AAB)格式,取代 APK 作为标准发布格式。 | ||
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AAB 格式通过减少包大小和加快下载速度来优化用户体验,但无法像 APK 一样直接安装,需要通过 Google Play 或第三方工具进行部署。 | ||
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根据 APKMirrors 的反馈,许多应用已经不再提供完整的安装包,这一变化可能是永久性的。 | ||
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--- | ||
layout: post | ||
title: 光盘时代落幕 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- SuperDrive | ||
--- | ||
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外置光驱SuperDrive在苹果美国官网、国行官网上显示为售罄状态。 | ||
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![](https://pic.imgdb.cn/item/66b21ee7d9c307b7e90fcfa2.jpg) | ||
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目前在英国和巴西等部分地区仍有SuperDrive库存,但售完后再生产的可能性微乎其微。 | ||
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--- | ||
layout: post | ||
title: 将 Telegram Channel 转为微博客 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- Telegram | ||
--- | ||
看到好多发这个 | ||
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✨ 特性 | ||
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- 将 Telegram Channel 转为微博客** | ||
- SEO 友好** | ||
- 浏览器端 0 JS** | ||
- 提供 RSS 和 RSS JSON** | ||
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## 部署 | ||
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1. [Fork](https://github.com/ccbikai/BroadcastChannel/fork) 此项目到你 GitHub | ||
2. 在 Cloudflare/Netlify/Vercel 创建项目 | ||
3. 选择 `BroadcastChannel` 项目和 `Astro` 框架 | ||
4. 配置环境变量 `CHANNEL` 为你的频道名称。此为最小化配置,更多配置见下面的配置项 | ||
5. 保存并部署 | ||
6. 绑定域名(可选)。 | ||
7. 更新代码,参考 GitHub 官方文档 | ||
8. [从 Web UI 同步分叉分支](https://docs.github.com/zh/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork#syncing-a-fork-branch-from-the-web-ui |
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--- | ||
layout: post | ||
title: 光通信 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- PCIe | ||
--- | ||
目前,在计算机的内部,CPU 与周边设备都使用 PCIe 接口进行通信。 | ||
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![](https://pic.imgdb.cn/item/66b3671cd9c307b7e9353fbb.webp) | ||
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PCIe 接口与设备之间,则是使用铜手指传输数据。 | ||
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![](https://pic.imgdb.cn/item/66b3675bd9c307b7e935e0df.webp) | ||
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但是,铜手指有物理限制,到了一定程度后,传输速率就上不去了。 | ||
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本月早些时候,一家美国公司公布了 PCIe 7.0 版的接口原型,放弃了铜手指,改用光纤传输数据,比目前主流的 PCIe 4.0 版快了8倍。 | ||
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![](https://pic.imgdb.cn/item/66b36776d9c307b7e93603ff.webp) | ||
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上图的黄线就是光纤,将设备连接到主板。以后,凡是大带宽的通信,可能都不使用铜了,而改用光纤 |
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--- | ||
layout: post | ||
title: 鹦鹉视频聊天 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 聊天 | ||
--- | ||
科学家做了一个实验,让鹦鹉视频聊天。 | ||
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![](https://pic.imgdb.cn/item/66b36827d9c307b7e9376442.webp) | ||
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科学家在笼子里放了一个平板电脑,两只鹦鹉通过平板电脑见面,互相通话(鸣叫)。 | ||
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![](https://pic.imgdb.cn/item/66b36842d9c307b7e937974e.webp) | ||
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科学家发现,鹦鹉很喜欢视频聊天,会连续跟屏幕互动几个小时。 | ||
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最神奇的地方是,一旦它们学会如何呼叫对方。它们就会自己打开关着的平板电脑,主动找对方聊天。 | ||
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![](https://pic.imgdb.cn/item/66b36860d9c307b7e937c7ab.webp) | ||
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这件事是不是说明,群居动物都有可能网络上瘾? | ||
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![](https://pic.imgdb.cn/item/66b36873d9c307b7e937e96e.webp) |
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--- | ||
layout: post | ||
title: 广义相对论的证据 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 相对论 | ||
--- | ||
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![](https://pic.imgdb.cn/item/66b36b6ad9c307b7e93ba857.jpg) | ||
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27年前,法国科学家通过欧洲南方天文台(ESO)的超大望远镜(VLT),发现有一颗恒星 S2 正围绕一个巨大质量的黑洞运行,最近时相距200亿公里(太阳与地球之距离的120倍)。 | ||
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S2 的运行速度为光速的3%,每16年运行一圈。经过27年的持续观察,科学家们终于证实,S2 的运行轨道不是牛顿万有引力理论所预言的椭圆,而是爱因斯坦广义相对论预测的玫瑰花形状(上图),这是由于黑洞的超大质量而造成的。下面是运行轨迹的动画视频。 | ||
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欧洲南方天文台(ESO)是15国政府为支持科学家在南半球研究天文学而组织的研究机构,成立于1962年,总部设在德国慕尼黑,望远镜和仪器都设在智利境内山脉之中。 |
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--- | ||
layout: post | ||
title: 美洲大赤鱿的发光语言 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 赤鱿 | ||
--- | ||
美洲大赤鱿(Dosidicus gigas)是一种生活在深海的大型鱿鱼,体内含有荧光素,所以会发光。 | ||
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根据海底摄像机拍到的画面,两条美洲大赤鱿相遇的时候,会改变身上的发光模式。研究人员提出一个假设,不同的发光模式其实是它们的交流语言。 | ||
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![](https://pic.imgdb.cn/item/66b36c66d9c307b7e93d5094.jpg) | ||
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它的发光有亮模式和暗模式,它可以让身体的一部分是亮模式,另一部分是暗模式。 | ||
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研究人员猜想,不同部位的深浅组合有不同的含义。例如在捕食时,它经常出现的半亮/半暗模式可能是一个警告:“当心,我要抓住那只灯笼鱼!” |
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--- | ||
layout: post | ||
title: 无人船穿越大西洋 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 大西洋 | ||
--- | ||
1620年,“五月花”号载着第一批英国移民来到北美。 | ||
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为了纪念这个事件400周年,IBM 公司建造了一艘无人船,也命名为“五月花”号,在2020年9月按照当年的航线,在没有船长和船员的情况下, | ||
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从英国普利茅斯驶向马萨诸塞州普利茅斯,成为有史以来第一批穿越大西洋的完全自主驾驶的船只。 | ||
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![](https://pic.imgdb.cn/item/66b36e57d9c307b7e940c9b8.jpg) | ||
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新的五月花号采用风能和太阳能的混合动力方式,并配有柴油发电机作为后备动力,船速可达20节, | ||
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不到两周就可以完成航行。过去两年,这艘船一直在进行航海图像的识别训练,现在能够正确地探测和分类船舶、浮标、陆地、防波堤、残骸等障碍。 | ||
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![](https://pic.imgdb.cn/item/66b36e5fd9c307b7e940d28a.jpg) |
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--- | ||
layout: post | ||
title: 钛心脏 | ||
author: mymsnn | ||
catalog: true | ||
tags: | ||
- 钛 | ||
- 科技 | ||
--- | ||
一家美国公司推出了钛金属的人工心脏 | ||
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![](https://pic.imgdb.cn/item/66b4be8cd9c307b7e928cb25.webp) | ||
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它的内部有一个磁悬浮的转子泵,负责将血液送到两个心室。磁悬浮的优点是尽可能减少摩擦力,保证机械顺滑。 | ||
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![](https://pic.imgdb.cn/item/66b4beacd9c307b7e928e562.webp) | ||
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钛心脏每分钟可以泵12升血液,足以满足人体需要。但是,它需要一个小型可充电的外部电机来驱动。 | ||
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目前,它还做不到永久替代原生心脏,只能作为心脏移植前的缓解措施,病人最终还是需要移植他人的心脏。 |