Update-Database 命令若在生产库执行，可能因 ALTER TABLE ADD COLUMN 锁表10分钟，教务处电话立刻打爆。 正确做法是 分离迁移脚本与执行 ：开发时用 dotnet ef migrations script --idempotent -o migration.sql 生成幂等SQL脚本，DBA审核后手动在SQL Server Management ...

An example of a condition-based maintenance system using algorithms in MATLAB to identify faults & estimate time to service. Rotating machinery parts are ubiquitous components in equipment ranging ...