This paper analysis the centralized control scheme based on logical key hierarchy and gives an improvement.
本文对基于逻辑密钥树的集中控制方案进行了分析和改进。
This paper gives an analysis of these problems and provides some corresponding method for improvement. Finally, an improved vector space model is presented.
本文就这些问题给予分析并给出了相应的改进方法，最后构建了一个改进后的向量空间模型。
This paper gives a comprehensive failure analysis on the thermal fatigue crack of engine exhaust manifold and makes an improvement for materials and structures.
对某车型发动机排气歧管的热疲劳断裂问题进行综合失效分析，并从材料、结构方面提出改进意见。
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