As for the basic control criteria, lack of necessary guideline in regulations led to perplexities for operators to abide by law.
基本控制标准的规定缺乏法律规范的必要指引性，给经营者的守法带来了困惑。
Inclusion criteria: Typical literatures, basic experimental research that restrictedly and scientifically designed, prospective randomized clinical research as well as case control study.
纳入标准：经典文献、经严格科学设计的基础实验研究、前瞻性随机性临床研究及病例对照研究。
The basic conceptions, such as control, delay-dependent stability criteria, and delay-independent stability criteria, are defined from the point of information.
从信息的观点，给出控制、时延相关稳定判据和时延不相关稳定判据的概念描述。
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