XML offers flexible support for loosely structured and hierarchical data, but it also comes with inevitable performance problems.

XML 对松耦合、结构化、层次化的数据提供了灵活的支持，但是它同时也带来了不可避免的性能问题。

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Important problems about the hierarchical defending of important area in post-emergency voltage control are studied.

研究了电压后紧急控制中重要区域的分层布防的重要问题。

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The paper researches the hierarchical control problems in the autonomous docking process of space stations with the viewpoint of large-scale dynamic systems.

本文从大规模动态系统观点出发，研究空间站自主对接过程的递阶控制问题。

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It was once believed that computers could never beat the best human at chess, because computers perform very inefficient brute force attacks on problems, instead of relying on intuition and hierarchical structures like our brains do.

FORBES: Machines Will Outsmart Humans. We Better Be Ready

In a nutshell, the problems were efficiency and scale, and the solution was bureaucracy, with its hierarchical structure, cascading goals, precise role definitions, and elaborate rules and procedures.

FORBES: Connect