一种视觉导航的里程碑文献，描述了场景匹配的评价方式。Kendoul: Survey of advances in GNC of ruAs 317
for launch and recovery. These three categories are domi- Finally, discussions and conclusions about published pa-
nated by conventional helicopter configurations with a sin- pe
在用mysql客户端对数据库进行操作时，打开终端窗口，如果一段时间没有操作，再次操作时，常常会报如下错误：
ERROR 2013 (HY000): Lost connection to MySQL server during query
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
这个报错信息就意味着当前的连接已经断开，需要重新建立连接。
那么，连接的时长是如何确认的？
解决办法是：
运行下面SQL
代码如下:USE master; GO DECLARE SQL VARCHAR(MAX); SET SQL=” SELECT SQL=SQL+’; KILL ‘+RTRIM(SPID) FROM master..sysprocesses WHERE dbid=DB_ID(‘数据库名’); EXEC(SQL);
ALTER DATABASE 数据库名 SET MULTI_USER;
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