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From the defender's point of view, this type of attack has proved (so far) to be very problematic, because we do not have effective methods to defend against this type of attack. Fundamentally speaking, we do not have an effective way for DNN to produce good output for all inputs. It is very difficult for them to do so, because DNN performs nonlinear/nonconvex optimization in a very large space, and we have not taught them to learn generalized high-level representations. You can read Ian and Nicolas's in-depth articles (http://www.cleverhans.io/security/privacy/ml/2017/02/15/why-attaching-machine-learning-is-easier-than-defending-it.html) to learn more about this.某大都市的刑警队在“科技强警”的背景之下，侦查技术人员深入侦查工作第一线，与侦查员一起，面对一个个带有鲜明时代特征的罪案，他们以丰富的知识，敏锐的目光，缜密的推理，高超的科学手段，艰苦的调查，一次次准确及时地寻找出犯罪嫌疑人，使案情大白于天下，惩恶扬善，维护社会的秩序和法律的尊严。该剧塑造了一群新型的公安干警形象：公安院校的硕士生、曾在苏格兰场受训的刑警队队长陈元；端庄秀丽的女法医王岚；技术神童王小光等等，都是以往公安题材电视剧所未曾表现过的崭新人物形象。B. Women: 100 meters, 200 meters, 400 meters, 800 meters, 1500 meters, 5,000 meters, 10,000 meters, marathon, 100 meters hurdles, 400 meters hurdles, high jump, long jump, triple jump, high jump, shot put, discus, javelin, hammer throw, heptathlon, 4 × 100 meters relay, 4 × 400 meters relay, 20 kilometers walking race.在第二季中主角们需要适应他们新的处境--狼人的统治和潜在的危险。虽然Klaus和Hayley发誓为了他们的女儿，他们要不惜一切的把新奥尔良变成一个安全的地方，但是他们两个还需要克服他们内在的恶魔。在女儿走后，Hayley会变得非常愤怒和抑郁，而在此刻最需要权利和能量的Klaus，却因为moonlight ring变得虚弱。Elijah会觉得被自己的家人孤立了起来，他会报复francesca和她统治下的werewolf，同时也会与Marcel以及marcel统治的vampire建立联系。尽管处于危险之中，Cami重新开始了她的学业，想要找回她遇到Klaus之前的生活。然而werewolf不是唯一的敌人。Klaus和Elijah没有想到的是，他们邪恶的父母回来了。他们的母亲Esther被自己对孩子们畸形的爱激励着。她有一个邪恶的计划-- 让她的家庭完整起来。2. Then click "Notice";何风听了张富的话，眼珠子都差点瞪出来了。A quick witted young man from the streets of South Central must rush a lily-white USC fraternity to recover a stash of stolen money.