美国Madshen振铃报警器 MDSE-DB-201668N产品性能:支持8路独立RS-485数据通信,全双工1路,其他均为半双工,均为双工支持透明通道。支持16路本地模拟数据监控,无限报警(模拟值为4〜20马)。报警输入和支撑20路,具有抗剪切功能,防止短路。支持16路报警输出 ...
db.collection.find({ "field" : { $gt: value } } ); // greater than : field > value db.collection.find({ "field" : { $lt: value } } ); // less than : field < value db.collection.find({ "field" : { $gte: value } } ); // greater than or equal to : field >= value...
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声音分贝(dB)等级及危害程度介绍 音量 类比 190分贝 导致死亡 140分贝 欧盟界定的导致听力完全损害的*高临界点 139分贝 ***球迷的呐喊声 130分贝 火箭发射的声音 125分贝 喷气式飞机起飞的声音 120分贝 在这种环境下呆超过一分钟即会产生暂时耳聋 110分贝 螺旋浆飞机起飞声音、摇滚音乐会的声音...
DB9针和DB25针串口的引脚定义 《设备监控技术详解》第3章串口设备监控,本章着力介绍串口交换机和串口联网方式。本节为大家介绍标准25针串口的引脚定义。 作者:李瑞民来源:机械工业出版社 3.3 串口线的制作和转换 串口的连接线受很多的限制,最典型的限制就是接口类型和连接线的作用,因为接口类型不同,则接口引脚不一...
商标名称 SHENXIA 国际分类 第09类-科学仪器 商标状态 商标注册申请 申请/注册号 40087261 申请日期 2019-08-02 申请人名称(中文) 深圳市永康达电子科技有限公司 申请人名称(英文) - 申请人地址(中文) 广东省深圳市龙华新区大浪街道大浪社区新围浪荣路华新锐明6栋6楼 申请人地址(英文) - 初审公告期号 - 初审...
Purpose The aim of our study was to investigate the mechanism by which the Chinese compound Shensong Yangxin Capsule (SSYX) reduces susceptibility to arrhythmia in db/db mice. Methods The db/db mice without drug treatment served as the model group. Other-treated db/db mice were administered ...
启动测试 启动的时候,注意查看日志,如下: 运行后可以测试得出使用动态数据源了 仓库URL GitHub: https://github.com/shenuadm/demo-dynamicDB Gitee: https://gitee.com/mchshenu/demo-dynamic-dbAbout SpringBoot 整合 Druid + DynamicDatasource 实现动态数据源 Resources Readme Activity Stars 1 star Watc...
🥑 ArangoDB is a native multi-model database with flexible data models for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions. - shen-zc/arangodb