2020 美团技术年货 CODE A BETTER LIFE 【算法篇】 算法 1 智能搜索模型预估框架 Augur 的建设与实践 1 Transformer 在美团搜索排序中的实践 23 BERT 在美团搜索核心排序的探索和实践 36 美团智能配送系统的运筹优化实战 60 一站式机器学习平台建设实践 77 美团搜索中 NER 技术的探索与实践 92 KDD Cup 如何实现能力的快速复用并能够保障业务的安全？ 下面，我们将逐一给出答案。 8 > 美团 2020 技术年货 4.1 构建预估内核：高效的特征和模型迭代 4.1.1 Operator 和 Transformer 在搜索场景下，特征抽取较为难做的原因主要包括以下几点： ● 来源多：商户、商品、交易、用户等数十个维度的数据，还有交叉维度。由于 美团业务众多，难以通过统一的特征存储去构建，交易相关数据只能通过服务 异步、自动聚合 RPC、并行 计算的编排优化，从而达到提升性能的目的。 Transformer：用于处理与模型相关的特征逻辑，如分桶、低频过滤等等。一个特 征可以配置一个或者多个 Transformer。Transformer 也提供接口，业务方可以根 据自己的需求定制逻辑。 算法 < 9 离在线统一逻辑：Transformer 是特征处理的模型相关逻辑，因此我们将 Trans- former

effect. <transformer- class-name> X (no more than one can be present) No effect on the deployed divert.(unless restarting broker, in which case the divert will be deployed without the transformer class) No effect on the deployed divert. (unless restarting broker, in which case the divert has the transformer class) Configuration Reload 111 class) class) X (no more than one can be present) Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

Configuration Reload 173 <transformer- class-name> more than one can be present) restarting broker, in which case the divert will be deployed without the transformer class) (unless restarting broker broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert.(unless restarting broker) No effect on the deployed divert Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

Configuration Reload 171 <transformer- class-name> more than one can be present) restarting broker, in which case the divert will be deployed without the transformer class) (unless restarting broker broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert.(unless restarting broker) No effect on the deployed divert Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

effect. <transformer- class-name> X (no more than one can be present) No effect on the deployed divert. (unless restarting broker, in which case the divert will be deployed without the transformer class) No effect on the deployed divert. (unless restarting broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert. (unless Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

effect. <transformer- class-name> X (no more than one can be present) No effect on the deployed divert. (unless restarting broker, in which case the divert will be deployed without the transformer class) No effect on the deployed divert. (unless restarting broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert. (unless Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

effect. <transformer- class-name> X (no more than one can be present) No effect on the deployed divert. (unless restarting broker, in which case the divert will be deployed without the transformer class) No effect on the deployed divert. (unless restarting broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert. (unless Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

effect. <transformer- class-name> X (no more than one can be present) No effect on the deployed divert. (unless restarting broker, in which case the divert will be deployed without the transformer class) No effect on the deployed divert. (unless restarting broker, in which case the divert has the transformer class) X (no more than one can be present) No effect on the deployed divert. (unless Diverts can also be configured to apply a Transformer . If specified, all diverted messages will have the opportunity of being transformed by the Transformer . When an address has multiple diverts configured

Diverts can also be configured to apply a Transformer. If specified, all diverted messages will have the opportunity of being transformed by the Transformer. When an address has multiple diverts configured configured, all of them receive the same, original message. This means that the results of a transformer on a message are not directly available for other diverts or their filters on the same address. See See the documentation on adding runtime dependencies to understand how to make your transformer available to the broker. A divert will only divert a message to an address on the same server. If you want

Diverts can also be configured to apply a Transformer. If specified, all diverted messages will have the opportunity of being transformed by the Transformer. When an address has multiple diverts configured configured, all of them receive the same, original message. This means that the results of a transformer on a message are not directly available for other diverts or their filters on the same address. See the documentation on adding runtime dependencies to understand how to make your transformer available to the broker. A divert will only divert a message to an address on the same server, however