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学者姓名：王鸿
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Abstract ：
There are several algorithms for the problem of query rewriting using views, including the bucket-based algorithms and the inverse rule-based algorithms. The inverse rule-based algorithms have considered the problem in the presence of functional dependencies. However, there are few papers that consider the influences of functional dependencies from the point of view of the bucket-based algorithms. In this paper, we discuss this issue in the bucket-based framework. We mainly consider how to use conditions weaker than the ones in the previous algorithms when forming a set of buckets. The novelty of our approach is that we can enforce additional constraints on the non-exported attributes in a view through functional dependencies. As a result, more valid buckets can be formed. We can then generate additional rewritings; which cannot be generated by the previous algorithms. We prove that our algorithm is sound and complete, i.e., the union of the obtained rewriting is a maximally-contained rewriting relative to functional dependencies under certain assumptions. In addition, we also discuss how to construct a recursive rewriting by making use of functional dependencies.
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| GB/T 7714 | Bai, QY , Hong, J , Wang, H et al. Influences of functional dependencies on bucket-based rewriting algorithms [J]. | ADVANCES IN WEB-AGE INFORMATION MANAGEMENT, PROCEEDINGS , 2005 , 3739 : 368-379 . |
| MLA | Bai, QY et al. "Influences of functional dependencies on bucket-based rewriting algorithms" . | ADVANCES IN WEB-AGE INFORMATION MANAGEMENT, PROCEEDINGS 3739 (2005) : 368-379 . |
| APA | Bai, QY , Hong, J , Wang, H , McTear, MF . Influences of functional dependencies on bucket-based rewriting algorithms . | ADVANCES IN WEB-AGE INFORMATION MANAGEMENT, PROCEEDINGS , 2005 , 3739 , 368-379 . |
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Abstract ：
据结晶学、热力学与动力学理论， 利用 Ｔ Ｅ Ｍ、图象分析仪和计算机， 模拟了 Ｃａ Ｏ Ａｌ２ Ｏ３ Ｓｉ Ｏ２ 系玻璃的液滴状分相过程， 研究中， 结合相变理论与实验数据， 建立了数学逻辑复合分相模型， 模拟结果表明， 由成核生长机理控制的玻璃液滴状分相， 形成对数分布的主要条件是： 液滴相临界半径必须在某一特定范围内波动； 液滴相生长相对线速度应是５ ％ ～１０ ％ ； 而开始分相液滴相临界半径和终止分相时液滴相半径的绝对值与分布类型无关本模拟方法为控制玻璃的纳米结构、研制特殊性能的玻璃材料提供了一种新的手段
Keyword ：
分相 分相 玻璃 玻璃 计算机模拟 计算机模拟
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| GB/T 7714 | 刘平 , 王鸿 , 陈显求 . CaO-Al_2O_3-SiO_2系玻璃分相的计算机模拟 [J]. | 无机材料学报 , 1999 , (04) : 553-557 . |
| MLA | 刘平 et al. "CaO-Al_2O_3-SiO_2系玻璃分相的计算机模拟" . | 无机材料学报 04 (1999) : 553-557 . |
| APA | 刘平 , 王鸿 , 陈显求 . CaO-Al_2O_3-SiO_2系玻璃分相的计算机模拟 . | 无机材料学报 , 1999 , (04) , 553-557 . |
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