这里不谈秒杀设计，不谈使用队列等使请求串行化，就谈下怎么用锁来保证数据正确，就是已经到减库存那一步了，在这一步中如果保证不超卖。
C++：服务员牵来一头牛，给了顾客主厨刀、削皮刀、剔骨刀、片刀、砍刀、美工刀……堆满在桌上，笑道，请享用！顾客一脸懵逼，但看到邻桌的老大爷用挥舞双截棍的姿势使用...
商城系统中，抢购和秒杀是很常见的营销场景，在一定时间内有大量的用户访问商场下单，主要需要解决的问题有两个： 高并发对数据库产生的压力； 竞争状态下如何解决商品库存超卖； 高并发对数据库产生的压力 对于第一个问题...竞争状态下如何解决商品库存超卖 对于第二个问题，需要重点说明。...INSERT INTO `order_log` (content) values('$content')"; mysqli_query($con, $sql); } redis 乐观锁防止超卖...mysqli_query($con, $sql)) { echo "秒杀完成"; } } else { exit('抢购失败'); } 未经允许不得转载：肥猫博客 » PHP高并发情形下怎么防止商品库存超卖
近期，ChatGPT风起云涌，“再不入局，就要被时代淘汰”的言论甚嚣尘上，借着这一波创业的朋友都不止3-4个，如果没记错，前几次抛出该言论的风口似乎是区块链，元...
至于不予置评到底是卖还是不卖，大家自己解读了。 由于腾讯有过大规模减持京东的历史，所以腾旭大规模减持美团的股票，想来也不会让大家吃惊。 要是腾讯最后没有大规模减持美团，这反而是让人吃惊的事情。...腾讯现在开始精打细算，怎么样从羊身上多撸一些羊毛下来了。 想一下，腾讯是什么体量的公司。如果腾讯都需要如此勤俭节约的过日子的话，那么其他公司会怎么样?京东会怎么样，美团会怎么样？...所以腾讯这次一边传闻卖美团股票，一边削减食堂开销，本质上都是做一件事，增加自己的现金流。 腾讯高层能够看到的东西，比我们能看到的肯定多。
在此次更新中，最受关注的可能就是能够进行视频识别的 Video Intelligence API 了。...为了向大家充分展示我们新发布的 Video Intelligence API 的具体功能，我曾编写了一个样例。...关于 Video Intelligence API 总体上说，Video Intelligence API 向开发者开放了一种接入谷歌预训练模型的方法，该模型不但可以从宏观上识别当前视频中每一帧的具体内容...对每一帧数据做图像识别，在上述 JASON 描述的层面的确能和 Video Intelligence API 达到一样的效果，但后者的功能却不止于此，而这也是 Video Intelligence API...关于 Video Intelligence API 更详细的介绍请在文末点击阅读原文，在雷锋网原文中点击链接来看视频（需访问外国网站），视频中的演讲嘉宾是 Video Intelligence API
后来发现做咨询业务没钱赚，但闲暇时做的小游戏《ZZT》竟然卖的很火。于是斯威尼就开始纠结，要不干脆改行做游戏？...很快他发现除了游戏本身，开发游戏的引擎也可以卖。于是，瑞恩把卡马克的游戏引擎卖给了很多公司，为ID Software赚了不少钱，并开辟了最早的游戏引擎市场。...幸运的是，斯威尼和瑞恩在新的时代再次看到了游戏的发展方向，传统的3A大作游戏已经开始走下坡路（注：3A指a lot of people, a lot of money, a lot of time），未来有三条路...：一条是像Steam这样的线上游戏发行商，以更丰富的游戏品类和更好的购买体验干掉传统的游戏光盘销售；另一条是像《魔兽世界》这样通过持续运营不断获得丰厚的营业收入，比如卖皮肤、卖武器；第三条路是卖引擎，让更多的人做出更好的游戏...《堡垒之夜》虚拟演唱会怎么办？Epic是这么做的，首先大幅降低虚幻引擎的授权费用，开展大规模免费培训，强势跟Unity竞争引擎市场，稳住基本盘。
The basic position of the navigation on the parking lot parking lot entrance and parking spaces, so that...Video Surveillance Function When the vehicle enters or exits the tunnel, the system performs dynamic...video surveillance and displays on the charged computer When the vehicle enters the parking lot, the...Video monitoring function, when the vehicle in and out of the access point, the system implements the...dynamic video monitoring, and displayed in the charge on a computer, when the vehicles into the parking
If you're a fan of TikTok, you've probably noticed that a lot of the videos feature popular songs....watch these videos, you may also want to be able to listen to the music without having to watch the video...This way, you can listen to the song anytime, even if you don't have access to the video....Plus, if you have a lot of TikTok videos saved, it can help free up space on your device.There are lots...Once you're happy with your selection, tap "Done" and then add your video as normal.ConclusionA TikTok
The topic we’re looking at is one that, with a few exceptions, gets a lot less press I think than bias...because it’s a lot harder to quantify (and as established in week 1, computer scientists love quantitative...Automation’s unfair advantage A lot of the time, that competition is rigged....I’ll elaborate a bit on these in the rest of the video....However much we might be told that all of these video conferencing technologies can provide us with the
李杉 编译自 Slate 量子位 出品 | 公众号 QbitAI 这几天你可能在网上看见了不少机器人。大洋彼岸Las Vegas正在举办的CES上，科技巨头、家...
本次笔记整理自NVIDIA 8月20日在线研讨会，原讲座标题：DEEPSTREAM SDK – ACCELERATING REAL-TIME AI BASED VIDEO AND IMAGE ANALYTICS...摄像头输入进入Deepstream容器，将使用AI来感知像素并进行分析， 然后将这些分析发送到Azure loT Edge运行时。联想创建的业务逻辑服务将生成通知服务并与运行时通信。...最后，将所有的遥测数据传输到Azure loT中心。 ? 现在让我们看看这个系统的运作情况。 您将看到的这个DEMO，以展示我们正在构建的概念的证明。...消息代理插件连接到Azure loT的运行时以与Azure IoT中心进行通信。 最后，整个解决方案可在容器中部署。 ? 通过IOT边缘运行时连接到Azure loT云。...此模块客户端是Azure loT SDK的一部分。Azure loT SDK是一组库，旨在简化从Azure loT中心发送和接收消息的过程。有关如何下载所有依赖项的详细说明，请参见菜单中的插件。
either take photos of the object we want to detect, look for them on the internet, extract them from a video...But again: you could take a video file and extract the frames as images....This is going to take a lot of time....It will also use a lot of memory and CPU....in video frames captured by a webcam.
当一线城市不再是第一选择，当互联网走进乡村，愈来愈多的年轻人选择回到乡村通过电商卖起了农产品。...1、毕业后选择回乡卖水果 96年的小李，自大学毕业后，就回到了家乡卖起了农产品。在开始之前，小李审视自己家乡的产业。...当小李找到工厂合作时，工厂并不相信小李，也不认为在网上卖能给他们带来多大的利益。但经过多番劝说以及产业链整合，小李在网上帮家乡卖出了价值2.3亿元的牛肉、猪肉、贡梨等当地特产。...2、农产品电商遭遇订单管理难题 在梨遇冷滞销的2021年上半年，为挽回损失，小李将家乡贡梨上架电商平台，十斤12块钱，一天能卖3万斤，最终在新梨下来的前一个月，卖了160万斤。...95后回乡创业卖农产品，更重要的意义在于，TA们带着自己对互联网的了解和对年轻人需求的洞察，能够带动农业产业升级。
This is all coming together in at least one unlikely place: video conferencing....Due in part to the virus, video rapidly is becoming the show-me application -- as in, if you can run...That's a lot smaller than the figures touted by Zoom, which also uses other providers like AWS....That's allowed competition like AWS to scoop up some name brands as well as smaller apps and a lot of...the demonstration of Oracle's scalability and rapid deployment capability, which will be used in a lot
advisory-meeting-with-young-couple-large-overlay.jpg One of these new methods of identity verification is through KYC video...How does KYC Video Identification work?...and liveness detection along with other various AI technology to scan the customer’s face during the video...The benefits of Video KYC Making use of KYC video identification provides businesses and financial institutions...Remote Verification There comes a lot of benefits by making the verification remotely carried out.
The tasks include robotics, Atari, DM Lab, Procgen, and a lot more....This video is a paper review / explanation where I also give my thoughts on the paper. http://mpvideo.qpic.cn
A Global Video Conferencing Standard We are asking people to go home and work from home....When they work from home, they'll need to video conference into meetings, and the quality of video conferencing...A War on Fake News and Bad Actors There is a lot of misinformation circulating online about this virus...A lot of this incorrect information is coming from countries that wish us harm but have no control over...identify and eliminate these invalid recommendations at scale, and doing so potentially could save a lot
header by @Kouprin PR: Runtime asynchrony tests by @nearmax PR: Contract rewards by @ evgenykuzyakov Video...: Benny Giang from Dapper Labs Video: Taylor Wei from Top Network Video: Jaynti Kanani from Matic Blog...News: Peter @ Parity discusses ongoing maintenance of their Ethereum client Substrate Video: Substrate...] Rust for Decentralized Technology Berlin Meetup [Video] WASM on the blockchain [Video] [In Chinese]...Things If you Run a Small Business Park In the Back of the Parking Lot Events October 1-31 | Online
客户在小程序端登陆后可以卖自己的车，也可以卖别人的车，同时可以出租自己的车，租用别人的车。然后管理员端可以发布公告，可以管理用户，管理用户发布的汽车信息（上下架），管理小程序端的轮播图。...演示视频：小程序https://www.bilibili.com/video/BV1b24y197oA/?...zw&vd_source=fa4ffd66538a5ca679a754398a6fdb5f管路员https://www.bilibili.com/video/BV1b24y197oA?...3.2普通用户——小程序端主要的功能：发布租车，发布卖车，收藏，各种条件检索车，自己的订单中心等，这块多文件上传车辆图片是亮点。4.部分截图图片图片图片
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