Estimation of availability and reliability in CurveBS CurveBS uses the RAFT protocol to maintain consistency of stored data. It generally takes the form of 3 replicas of data. If one replica fails intervention is required to handle the failure according to the actual situation of the system. Estimation of availability and reliability in the three- replicas case Assume that the total number of

SSD, NVM ■ Stable stage 稳定存储器 theoretically never cannot be guaranteed 图片来源: Power consumption estimation using in-memory database computation 10 不同存储介质的访问时间 图片来源：Systems Performance: Enterprise and Data files Log files Log Buffer Pool Log record … Log buffer Random Access Cost: ~15ms Sequential Access Cost: ~1ms append 18 1. All log records pertaining to an updated page are written to

11692. [20] Tomas Mikolov, Kai Chen, Gregory S. Corrado, and Jeffrey Dean. 2013. Efficient estimation of word representations in vector space. In ICLR. [21] Margaret Mitchell, Jacqui Aguilar, Theresa 子健、瑞年、冠炜、翔宇、超博、炎根、杨帆、广鲁等，均来自美团平台 / 语音交互部。 214 > 2022年美团技术年货 8. 参考文献 [1] Mikolov, Tomas, et al. “Efficient estimation of word representations in vector space.” arXiv preprint arXiv:1301.3781 (2013). [2] Pennington conference on Knowledge discovery and data mining. 2014. [4] Mikolov, Tomas, et al. “Efficient estimation of word representations in vector space.” arXiv preprint arXiv:1301.3781 (2013). [5] Grbovic

Orientation Tracking Facial Expressions Tracking +Metal +Vision +CoreML +SceneKit +SpriteKit Light Estimation 看别人的游戏和Apps • 内容/功能简短 • 操作简单直观 • 设备不要剧烈晃动，不要快速移动 看别人的游戏和Apps • 内容/功能简短 • 操作简单直观 • 设备不要剧烈晃动，不要快速移动

probability of X’ labeled to 1 • Then we can get new function for W based on Maximum Likelihood Estimation • Then we can get the best W by maximize l(W), just applying gradient descent wj = wj + a m

scale factor Arbitrary temporal frames Our Method 44 45 Data from Vid4 [Ce Liu et al.] Motion Estimation Our Method 46 ???????????????????????? ???????????? ????????????0 ???????????? ME ??????

application for free. At the time, this was a revolutionary concept as most commercial 3D applications cost thousands of dollars. NaN hoped to bring professional level 3D modeling and animation tools within and the GPL When one hears about “free software”, the first thing that comes to mind might be “no cost”. While this is often true, the term “free software” as used by the Free Software Foundation (originators GNU General Public License) is intended to mean “free as in freedom” rather than in the sense of “no cost” (which is usually referred to as “free as in free beer” or gratis). Free software in this sense is

2 版本中，你可以获得以下关键特性： • 支持基于部分函数创建表达式索引 (Expression index)，极大提升查询的性能。 • 提升优化器的估算准确度 (Cardinality Estimation)，有助于选中最优的执行计划。 • 锁视图 (Lock View) 成为 GA 特性，提供更直观方便的方式观察事务加锁情况以及排查死锁问题。 25 • 新增 TiFlash I/O 限流功能，提升 算子的 SQL 语句引起 OOM 时，可以尝试设置算子的并发度为 1 来 触发落盘，缓解 TiDB 内存压力。 用户文档，#25882 • 提升优化器的估算准确度 (Cardinality Estimation) – 提升 TiDB 对 TopN/Limit 估算的准确度。例如，对于包含 order by col limit x 的大表分页查询，TiDB 可以更容易地选对索引，降低查询响应时间。 Optimize for deterministic performance at the cost �→ of increased power consumption - network-latency - Optimize for deterministic performance at the cost �→ of increased power consumption, focused on

操作，ADMIN SHOW DDL JOBS 的结果中缺少表名的问题 #42268 @tiancaiamao – 修复 Ignore Event Per Minute 和 Stats Cache LRU Cost 图表在 Grafana 监控面板中有时不可见的 问题 #42562 @pingandb – 修复查询表 INFORMATION_SCHEMA.COLUMNS 时，ORDINAL_POSITION Column，需要保证有相应索引，否则这将是一个全表扫 的语句，性能会很差。 • 使用合适的 Join 类型。根据查询中各个表的大小和关联性，选择合适的 Join 类型也会非常重要。一般情 况下，TiDB 的 cost-based 优化器会自动选择最优的 Join 类型。但在少数情况下，用户手动指定 Join 类型可 能会更好。 • 使用合适的存储引擎。对于 OLTP 和 OLAP 混合类型的负载，推荐使用 TiFlash Optimize for deterministic performance at the cost �→ of increased power consumption - network-latency - Optimize for deterministic performance at the cost �→ of increased power consumption, focused on

些是不可建模的不确定性，你不知道下⾯会发⽣什么。但有⼀些是你能确定的，能排除掉⼀些东西 的，这是⼀个通⽤的、对世界去进⾏建模的模型。有很多历史学家来对这个事情做过研究，⽐如 Density
Estimation（密度统计），⼤模型本质是在做这样⼀个事情。但当时我只意识到这是个重要的 问题，⽽没有意识到是唯⼀要解决的问题。 36氪：那是什么时候让你改变主意了？
杨植麟：2020年GPT-3出