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Time relays are divided into two types: on-time delay type and off-time delay type, and their symbols are shown in the following figure. For the power-on delay type time relay, when the coil is powered on, the power-on delay type contact acts after the delay time (the normally closed contact is opened and the normally open contact is closed), and the contact immediately returns to normal after the coil is powered off; For the power-off delay type time relay, when the coil is powered on, the power-off delay type contact acts immediately (the normally closed contact is opened and the normally open contact is closed). After the coil is powered off, the contact will not return to normal until the delay time is passed.Ancient Aliens endow Calvin "A.I." Cashill and his local cos-play pals with their characters' superpowers to save the multiverse from total annihilation.苏一沫与佳硕两个人青梅竹马，苏一沫以为佳硕心中有爱的人，佳硕以为她爱着社团学长，两个人在一次次的误会中，隐忍自己的感情，错过彼此。在某神秘组织的时间使者黎薇的暗中帮忙，化身苏一沫的闺蜜，将时间停留在了佳硕生日那天，在一天天的循环着4月1日，在一次次的只属于两个人相处中，深藏的感情再也无法压抑，苏一沫主动像佳硕表明了心意，两个人原来彼此深爱，在一个吻后打开了循环的钥匙，时间恢复了正常，两个人错过15年的感情终于走上正轨，开始了属于他们的幸福之图。　　在这个热带城市，有着这样一个团队，他们严谨敬业，他们辛勤客观，他们由鉴证人员，验尸官，调查员等各方面的专家组成，出入各个案发现场，用锐利的眼神寻找蛛丝马迹，巧妙利用弹道学、犯罪危险因子学、法医毒理学、DNA鉴定、咬痕与血型分析、齿 、科学、昆虫学、痕迹学和犯罪变态心理学抽丝剥茧，将支离破碎的线索拼凑起来，还原出事实真相。Jodie（Jill Halfpenny）八年前失去了自己的儿子，此后一直努力重建自己的生活。当她看到一个十多岁的男孩Daniel时，她笃定自己找到了失踪的儿子。无论Jodie是对是错，在那一瞬间，她的希望之火被点燃，由此走上了一条危险而越轨的道路，这条路将把她带向理智的边缘。为了寻找失踪的孩子，她会做到什么程度？AI is in the current air outlet, so many people want to fish in troubled waters and get a piece of the action. However, many people may not even know what AI is. The connection and difference between AI, in-depth learning, machine learning, data mining and data analysis are also unclear. As a result, many training courses have sprung up, which cost a lot of money to teach demo and adjust the participants. They have taught you to study engineers quickly and deeply in one month, making a lot of money. We should abandon this kind of industry atmosphere! In my opinion, any AI training currently on the market is not worth attending! Don't give money to others, won't it hurt? -However, when everyone taught themselves, they did not know where to start. I got a lot of data, ran a lot of demo, reported a lot of cousera, adjusted the parameters, and looked at the good results of the model. I thought I had entered the door. Sorry, sorry, I spoke directly. Maybe you even sank the door. In my opinion, there are several levels of in-depth study of this area: (ignore the name you have chosen at random-)Let's look at the above picture first. It is three short video apps. It can be seen that although the content types are the same and the product forms are similar, the different contents displayed will give users different feelings.