本书基于清华大学出版社出版的《TensorFlow 深度学习—深入理解人工智能算法》一书 进行二次撰写，代码部分完全基于 PyTorch 进行实现。考虑到本人能力有限、行文仓促，可 以预见地，本书会存在部分语句表达不准确、部分素材尚未创作完成、部分参考引用未能及 时补充、甚至一些错误出现，因此本书以开源、免费地方式发布，希望一方面能够帮助初学 者快速上手深度学习算法，另一方面也能汇聚众多行业专家们的力量，修正测试版中的谬误 之处，让本书变得更为完善。 1.15 目标检测效果图 图 1.16 语义分割效果图 视频理解(Video Understanding) 随着深度学习在 2D 图片的相关任务上取得较好的效 果，具有时间维度信息的 3D 视频理解任务受到越来越多的关注。常见的视频理解任务有 视频分类、行为检测、视频主体抽取等。常用的模型有 C3D、TSN、DOVF、TS_LSTM 等。 图片生成(Image Generation) × 4，现有 2 个通道的源张量 src， 其 shape 为:[2,4,4]，需要写入索引为[1,3]的通道上。 源张量：src 目标张量：x 输出 索引坐标：index 图 5.4 3D 张量更新示意图 下面将新的特征图写入目标张量中，实现如下： In [62]: # 构造写入位置，即 2 个位置 idx = torch.tensor([1, 3]) src = torch

（1）无担保：作者不保证文档内容的准确无误，亦不承担由于使用此文档所导致的任何后果 （2）自由使用：任何人可以出于任何目的而自由地 阅读/链接/打印/转载/引用/分发/再创作 此文档，无 需任何附加条件 若您 阅读/链接/打印/转载/引用/分发/再创作 本文档，则说明接受以上2个条 款。 作者：李茂福 更新日期：2023-12-29 ★第0章、K8S集群搭建准备工作 相关单词原义：

https://github.com/servicemesher/meetup-slides #IstioCon Istio Handbook • 于 2019 年发起 • 共 26 人参与，已创作超过 7 万字 • 预计 2021 年出版 • 预览地址：https://www.servicemesher.com/istio-handbook #IstioCon Istio Handbook

感谢读者对本书的关注，因为读者的注意力是一种稀缺的资源：此刻读者正在阅读本书（而忽略了其他的书）， 因此读者的注意力是用机会成本（与金钱类似）来支付的。为了确保读者现在投入的注意力是值得的，作者 们尽全力（全部的注意力）创作一本好书。 自经济学研究稀缺资源分配以来，人们正处在“注意力经济”时代，即人类的注意力被视为可以交换的、有 限的、有价值的且稀缺的商品。许多商业模式也被开发出来去利用这一点：在音乐或视频流媒体服务上，人 operation），其中任何超出有效长度的位置都被掩蔽并置为0。 #@save def masked_softmax(X, valid_lens): """通过在最后一个轴上掩蔽元素来执行softmax操作""" # X:3D张量，valid_lens:1D或2D张量 if valid_lens is None: return nn.functional.softmax(X, dim=-1) else: shape torch.linspace(-1.0, 1.0, 101)) z = x**2 - y**2 ax = d2l.plt.figure().add_subplot(111, projection='3d') ax.plot_wireframe(x, y, z, **{'rstride': 10, 'cstride': 10}) ax.plot([0], [0], [0], 'rx') ticks

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 73 4.4.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 202. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 73 4.4.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 202. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 73 4.4.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 202. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 4.5.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 74 4.5.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 206. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.4.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 73 4.4.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 201. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page

Hardware-accelerated graphics . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 4.4.1 Hardware 3D acceleration (OpenGL and Direct3D 8/9) . . . . . . . . . 72 4.4.2 Hardware 2D video acceleration for Hardware vs. software virtualization, page 196. • Guest Additions: shared folders, seamless windows, 3D virtualization. The VirtualBox Guest Additions are software packages which can be installed inside virtual machine will sup- port automatic adjustment of video resolutions, seamless windows, accelerated 3D graphics and more. The Guest Additions are described in detail in chapter 4, Guest Additions, page