As for subspace based MUD, two improved algorithms are shown from the point of view of subspace tracking to solve the problems of slow tracking and unstable performance in traditional methods.

对于基于子空间的多用户检测算法，本文主要从子空间跟踪角度入手，针对传统方法跟踪速度慢，性能不稳定的问题，提出了两种改进算法。

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The agent that updates the index database with new documents is currently rather slow and is not optimized, which can be fixed by adding a couple of tracking fields to the index documents.

使用新文档更新索引数据库的代理目前速度很慢，且未进行优化，通过添加一对跟踪字段到索引文档中就可以解决这一问题。

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When advancing large thickness cutting, frequency tracking shall be properly adjusted slow, you'd better adjust it to stable cutting from zero position and ammeter pointer no longer shakes sharply.

在作大厚度切割时，变频跟踪应适当调慢，最好从零位起调至切割稳定，电流表指针不再激烈晃动。

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For instance, he plans to prod dealers to part with cars more quickly by tracking their inventory and alerting them to slow-moving vehicles.

FORBES: Magazine Article

The goal is to provide users a place to click in the ad itself that would let them opt out of receiving such targeted ads. (It doesn't turn off tracking altogether.) The program has been slow to catch on, new findings indicate.

WSJ: Latest in Web Tracking: Stealthy 'Supercookies'

Satellite and space expert Dr Stuart Eves stressed the large uncertainties involved in tracking the "decay" of satellite orbits (their slow fall back into the Earth's atmosphere).

BBC: Nasa refines satellite crash time