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Lesson 4 - Deep Learning 2018-gbceqO8PpBg.en.vtt
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WEBVTT
Kind: captions
Language: en
Style:
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<c.colorCCCCCC>interesting<00:09:43.870><c> result</c><00:09:44.890><c> and</c><00:09:45.890><c> one</c><00:09:46.220><c> important</c></c>
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activations<c.colorCCCCCC><00:09:53.720><c> earlier</c><00:09:54.350><c> and</c><00:09:54.589><c> so</c><00:09:55.279><c> what</c><00:09:55.490><c> it</c><00:09:55.579><c> means</c></c>
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the
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<c.colorCCCCCC>dropout<00:11:18.350><c> idea</c><00:11:18.769><c> that</c><00:11:19.040><c> was</c></c><c.colorE5E5E5><00:11:19.189><c> loosely</c><00:11:19.550><c> inspired</c></c>
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<c.colorE5E5E5>those</c><c.colorCCCCCC><00:12:32.630><c> of</c></c><c.colorE5E5E5><00:12:32.779><c> you</c><00:12:32.899><c> that</c><00:12:33.019><c> have</c><00:12:33.139><c> been</c><00:12:33.259><c> wondering</c></c>
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why<00:12:34.310><c> is</c><00:12:34.370><c> it</c><c.colorE5E5E5><00:12:34.910><c> that</c><00:12:35.269><c> particularly</c><00:12:35.810><c> early</c><00:12:35.959><c> in</c></c>
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training<00:12:36.709><c> my</c><00:12:37.220><c> validation</c><00:12:37.850><c> losses</c><00:12:38.600><c> better</c>
00:12:39.050 --> 00:12:44.060 align:start position:19%
than<00:12:39.800><c> my</c><00:12:39.949><c> training</c><00:12:40.339><c> losses</c><00:12:40.699><c> but</c><00:12:41.240><c> which</c><00:12:41.449><c> seems</c>
00:12:41.750 --> 00:12:45.529 align:start position:19%
<c.colorE5E5E5>otherwise<00:12:42.680><c> really</c><00:12:43.100><c> surprising</c><00:12:43.610><c> hopefully</c></c>
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some<00:12:44.269><c> of</c><c.colorCCCCCC><00:12:44.300><c> you</c><00:12:44.449><c> have</c><00:12:44.540><c> been</c><00:12:44.600><c> wondering</c><00:12:45.199><c> why</c><00:12:45.319><c> that</c></c>
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is<00:12:45.850><c> because</c><00:12:46.899><c> on</c><c.colorE5E5E5><00:12:47.899><c> a</c><00:12:47.959><c> data</c><00:12:48.259><c> set</c><00:12:48.559><c> that</c><00:12:48.589><c> it</c><00:12:48.800><c> never</c></c>
00:12:48.980 --> 00:12:53.149 align:start position:19%
gets<c.colorE5E5E5><00:12:49.160><c> to</c><00:12:49.399><c> see</c></c><c.colorCCCCCC><00:12:49.430><c> you</c></c><c.colorE5E5E5><00:12:49.939><c> wouldn't</c><00:12:50.269><c> expect</c><00:12:50.480><c> the</c></c>
00:12:50.930 --> 00:12:55.579 align:start position:19%
losses<c.colorE5E5E5><00:12:51.319><c> to</c><00:12:51.500><c> ever</c><00:12:51.649><c> be</c><00:12:51.889><c> that's</c><00:12:52.759><c> better</c></c>
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and<00:12:53.360><c> the</c><00:12:53.750><c> reason</c><00:12:54.079><c> why</c><00:12:54.290><c> is</c><00:12:54.649><c> because</c><00:12:54.860><c> when</c><00:12:55.399><c> we</c>
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look<00:12:55.759><c> at</c><c.colorE5E5E5><00:12:55.910><c> the</c><00:12:56.059><c> validation</c><00:12:56.630><c> set</c></c><c.colorCCCCCC><00:12:56.870><c> we</c><00:12:57.290><c> turn</c></c><c.colorE5E5E5><00:12:57.589><c> off</c></c>
00:12:57.769 --> 00:13:01.069 align:start position:19%
dropout<c.colorCCCCCC><00:12:58.189><c> right</c><00:12:59.120><c> so</c><00:12:59.300><c> in</c><00:12:59.360><c> other</c><00:12:59.480><c> words</c><00:12:59.720><c> when</c></c>
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you're<00:12:59.959><c> doing</c><00:13:00.199><c> inference</c><c.colorE5E5E5><00:13:00.620><c> when</c><00:13:00.980><c> you're</c></c>
00:13:01.069 --> 00:13:05.180 align:start position:19%
<c.colorCCCCCC>trying</c><c.colorE5E5E5><00:13:01.220><c> to</c><00:13:01.279><c> say</c><00:13:01.370><c> is</c><00:13:01.550><c> this</c><00:13:01.730><c> or</c><00:13:01.939><c> cat</c></c><c.colorCCCCCC><00:13:02.149><c> or</c><00:13:02.360><c> is</c></c><c.colorE5E5E5><00:13:02.720><c> this</c></c>
00:13:02.899 --> 00:13:07.879 align:start position:19%
a<00:13:02.930><c> dog</c><c.colorE5E5E5><00:13:03.279><c> we</c><00:13:04.279><c> certainly</c><00:13:04.639><c> don't</c><00:13:04.819><c> want</c><00:13:04.939><c> to</c><00:13:05.059><c> be</c></c>
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including<00:13:05.829><c> random</c><00:13:06.829><c> drop</c><00:13:07.069><c> out</c><00:13:07.250><c> there</c><00:13:07.459><c> right</c><00:13:07.759><c> we</c>
00:13:07.879 --> 00:13:13.279 align:start position:19%
want<00:13:08.029><c> to</c><00:13:08.089><c> be</c><c.colorE5E5E5><00:13:08.180><c> using</c></c><c.colorCCCCCC><00:13:08.509><c> the</c><00:13:08.600><c> best</c><00:13:08.809><c> model</c><00:13:09.230><c> we</c><00:13:10.100><c> can</c></c>
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<c.colorCCCCCC>okay<00:13:11.420><c> so</c><00:13:11.870><c> that's</c><00:13:12.050><c> why</c><00:13:12.170><c> early</c><00:13:12.559><c> in</c><00:13:12.649><c> training</c><00:13:13.069><c> in</c></c>
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<c.colorE5E5E5>particular</c>
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actually<00:13:15.760><c> see</c><00:13:16.089><c> that</c><00:13:16.300><c> our</c><00:13:16.450><c> validation</c>
00:13:17.430 --> 00:13:26.520 align:start position:19%
accuracy<c.colorCCCCCC><00:13:18.430><c> and</c><00:13:18.580><c> loss</c><00:13:18.790><c> tends</c><00:13:19.330><c> to</c><00:13:19.480><c> be</c><00:13:19.570><c> better</c><00:13:20.130><c> if</c></c>
00:13:21.130 --> 00:13:28.900 align:start position:19%
<c.colorE5E5E5>we're<00:13:21.339><c> using</c><00:13:21.490><c> dropout</c><00:13:21.940><c> okay</c><00:13:22.810><c> so</c><00:13:23.529><c> yes</c></c><c.colorCCCCCC><00:13:24.010><c> you</c><00:13:24.610><c> know</c></c>
00:13:26.520 --> 00:13:30.460 align:start position:19%
<c.colorE5E5E5>you<00:13:27.520><c> have</c><00:13:27.670><c> to</c><00:13:27.760><c> do</c><00:13:27.850><c> anything</c><00:13:28.120><c> to</c><00:13:28.450><c> accommodate</c></c>
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<c.colorCCCCCC>for<00:13:29.230><c> the</c><00:13:29.350><c> fact</c><00:13:29.380><c> that</c><00:13:29.650><c> you</c><00:13:29.830><c> are</c><00:13:29.890><c> throwing</c><00:13:30.220><c> away</c></c>
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some<00:13:31.770><c> that's</c><00:13:32.770><c> a</c><00:13:32.950><c> great</c><00:13:33.220><c> question</c><c.colorCCCCCC><00:13:33.700><c> so</c><00:13:34.560><c> we</c><00:13:35.560><c> don't</c></c>
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that<c.colorCCCCCC><00:13:36.760><c> PI</c><00:13:37.000><c> torch</c><00:13:37.360><c> does</c><00:13:37.690><c> so</c><00:13:38.020><c> PI</c><00:13:38.350><c> torch</c><00:13:38.680><c> behind</c></c>
00:13:38.860 --> 00:13:43.990 align:start position:19%
<c.colorCCCCCC>the<00:13:39.160><c> scenes</c><00:13:39.460><c> does</c><00:13:39.820><c> two</c><00:13:40.060><c> things</c><00:13:40.089><c> if</c><00:13:40.570><c> you</c><00:13:40.660><c> say</c></c><c.colorE5E5E5><00:13:40.870><c> P</c></c>
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equals<c.colorCCCCCC><00:13:41.440><c> point</c><00:13:41.620><c> five</c></c><c.colorE5E5E5><00:13:41.920><c> it</c><00:13:42.520><c> throws</c><00:13:42.850><c> away</c><00:13:42.880><c> half</c><00:13:43.570><c> of</c></c>
00:13:43.990 --> 00:13:51.310 align:start position:19%
<c.colorE5E5E5>the<00:13:44.339><c> activations</c></c><c.colorCCCCCC><00:13:45.720><c> but</c><00:13:46.720><c> it</c><00:13:46.870><c> also</c><00:13:47.400><c> doubles</c><00:13:48.600><c> all</c></c>
00:13:49.600 --> 00:13:53.650 align:start position:19%
the<00:13:49.810><c> activations</c><c.colorE5E5E5><00:13:50.380><c> that</c><00:13:50.589><c> are</c><00:13:50.680><c> already</c><00:13:50.830><c> there</c></c>
00:13:51.310 --> 00:13:56.170 align:start position:19%
so<c.colorE5E5E5><00:13:51.850><c> when</c></c><c.colorCCCCCC><00:13:52.060><c> average</c><00:13:52.570><c> the</c><00:13:52.839><c> kind</c></c><c.colorE5E5E5><00:13:53.020><c> of</c><00:13:53.110><c> the</c><00:13:53.290><c> average</c></c>
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<c.colorE5E5E5>activation<00:13:54.520><c> doesn't</c><00:13:54.820><c> change</c><00:13:55.029><c> which</c><00:13:56.020><c> is</c></c>
00:13:56.170 --> 00:14:01.570 align:start position:19%
pretty<00:13:56.380><c> pretty</c><00:13:57.070><c> neat</c><00:13:57.339><c> trick</c><c.colorE5E5E5><00:13:58.950><c> so</c><00:13:59.950><c> yeah</c><00:14:00.160><c> you</c></c>
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don't<00:14:00.400><c> have</c><c.colorCCCCCC><00:14:00.490><c> to</c></c><c.colorE5E5E5><00:14:00.610><c> worry</c><00:14:00.850><c> about</c><00:14:00.940><c> it</c><00:14:01.150><c> basically</c></c>
00:14:01.570 --> 00:14:09.910 align:start position:19%
<c.colorCCCCCC>it's<00:14:01.960><c> it's</c><00:14:02.260><c> done</c><00:14:02.500><c> for</c><00:14:02.740><c> you</c><00:14:04.140><c> so</c><00:14:05.140><c> if</c><00:14:05.529><c> we</c><00:14:05.800><c> say</c><00:14:06.160><c> so</c></c>
00:14:06.520 --> 00:14:12.730 align:start position:19%
<c.colorE5E5E5>you<00:14:06.790><c> can</c><00:14:07.000><c> pass</c><00:14:07.240><c> in</c><00:14:07.690><c> peas</c><00:14:08.260><c> this</c><00:14:09.100><c> is</c><00:14:09.279><c> the</c><00:14:09.490><c> this</c><00:14:09.850><c> is</c></c>
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<c.colorE5E5E5>the</c><c.colorCCCCCC><00:14:10.150><c> p</c><00:14:10.390><c> value</c><00:14:10.870><c> for</c></c><c.colorE5E5E5><00:14:10.900><c> all</c><00:14:11.740><c> of</c><00:14:11.920><c> the</c><00:14:12.100><c> added</c><00:14:12.490><c> layers</c></c>
00:14:12.730 --> 00:14:18.370 align:start position:19%
<c.colorE5E5E5>to<00:14:13.570><c> say</c></c><c.colorCCCCCC><00:14:14.010><c> with</c><00:14:15.010><c> first</c><00:14:15.310><c> AI</c><00:14:15.490><c> what</c><00:14:15.970><c> dropout</c><00:14:16.420><c> do</c><00:14:16.570><c> you</c></c>
00:14:16.690 --> 00:14:20.890 align:start position:19%
want<00:14:16.930><c> on</c><00:14:17.110><c> each</c><c.colorE5E5E5><00:14:17.140><c> of</c><00:14:17.470><c> the</c><00:14:17.589><c> layers</c><00:14:17.800><c> in</c><00:14:17.920><c> these</c></c>
00:14:18.370 --> 00:14:23.980 align:start position:19%
<c.colorE5E5E5>these<00:14:18.820><c> added</c><00:14:19.180><c> layers</c><00:14:19.390><c> it</c><00:14:20.080><c> won't</c><00:14:20.380><c> change</c><00:14:20.709><c> the</c></c>
00:14:20.890 --> 00:14:25.500 align:start position:19%
<c.colorCCCCCC>dropout<00:14:21.610><c> in</c><00:14:21.820><c> the</c><00:14:22.480><c> pre</c></c><c.colorE5E5E5><00:14:22.690><c> trained</c><00:14:23.020><c> network</c><00:14:23.470><c> like</c></c>
00:14:23.980 --> 00:14:27.670 align:start position:19%
the<00:14:24.130><c> hope</c><00:14:24.310><c> is</c><00:14:24.520><c> that</c><c.colorE5E5E5><00:14:24.550><c> that's</c><00:14:24.910><c> already</c><00:14:25.120><c> been</c></c>
00:14:25.500 --> 00:14:29.740 align:start position:19%
<c.colorE5E5E5>pretty<00:14:26.500><c> trained</c><00:14:26.770><c> with</c><00:14:26.980><c> some</c></c><c.colorCCCCCC><00:14:27.130><c> appropriate</c></c>
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level<00:14:27.970><c> of</c><00:14:28.060><c> dropout</c><00:14:28.450><c> we</c><00:14:28.690><c> don't</c><00:14:28.870><c> change</c><00:14:29.110><c> it</c><c.colorCCCCCC><00:14:29.290><c> put</c></c>
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on<00:14:29.830><c> these</c><00:14:29.980><c> layers</c><00:14:30.310><c> that</c><c.colorCCCCCC><00:14:30.339><c> we</c><00:14:30.550><c> add</c><00:14:30.730><c> you</c><00:14:31.330><c> can</c></c><c.colorE5E5E5><00:14:31.360><c> say</c></c>
00:14:31.750 --> 00:14:36.910 align:start position:19%
how<00:14:31.990><c> much</c><c.colorCCCCCC><00:14:32.170><c> and</c><00:14:32.230><c> so</c><00:14:32.560><c> you</c><00:14:32.620><c> can</c><00:14:32.740><c> see</c><00:14:32.890><c> here</c><00:14:33.100><c> as</c><00:14:33.190><c> a</c></c>
00:14:33.220 --> 00:14:40.839 align:start position:19%
<c.colorCCCCCC>T's<00:14:33.580><c> equals</c><00:14:34.450><c> 0.5</c></c><c.colorE5E5E5><00:14:34.750><c> so</c><00:14:35.650><c> my</c><00:14:35.830><c> first</c></c><c.colorCCCCCC><00:14:36.010><c> dropout</c><00:14:36.490><c> has</c></c>