Two main problem are addressed in PPDM:One is the protection of sensitive raw data;the other is the protection of sensitive knowledge contained in the data,which is also called knowledge hiding in database(KHD).
首先介绍KHD产生的背景,然后着重讨论敏感关联规则隐藏技术和分类规则隐藏技术,接着探讨KHD方法的评估指标,最后归结出KHD后续研究的3个方向:数据修改技巧中基于目标距离的优化测度函数设计、数据重构技巧中的反向频繁项集挖掘以及基于数据抽样技巧的通用知识隐藏方法设计。
A sample size-based knowledge hiding in database policy is proposed,which is aimed at reducing the probability of the disclosure of the sensitive data.
针对数据的知识安全提出了一种新的安全机制——基于样本大小的数据库知识隐藏策略,这种安全模型适用于非授权用户,使得恶意的数据挖掘不能得到想要的结果,为数据库的敏感知识及隐私信息提供更好的保护。
Pawlak rough sets, S-rough sets and function S-rough sets are penetrated and crossed with the issue comprehensive evaluation, knowledge hiding discovery, dynamic economic system law forecast and information safety research, and give researches and discussions.
Pawlak粗糙集、S-粗集、函数S-粗集理论与综合评价、知识隐藏发现、动态经济系统规律预测、信息安全相嫁接,给出研究与讨论。
By using dual of one direction S-rough sets and its hiding characteristics,the concepts of-hiding knowledge,F-hiding knowledge,hiding degree and hiding dependence are given.
利用单向S-粗集对偶与它的隐藏特性,本文给出f-隐藏知识,F-隐藏知识,隐藏度,隐藏依赖的概念,提出隐藏知识的隐藏定理,隐藏知识的隐藏依赖定理,给出F-隐藏与F-隐藏依赖在系统状态识别中的应用。
By using S-rough sets,the concepts of f-hiding knowledge,F-hiding knowledge,hiding degree and dependence degree were presented,hidi.
利用S-粗集,给出了f-隐藏知识,F-隐藏知识,隐藏度和隐藏-依赖度的概念,提出了关于隐藏知识的隐藏定理和隐藏-依赖定理,并给出应用。
He received instruction of the Treasure of Knowledge, Utara Tantra Shastra, and instruction of Inner Profound Knowledge, Hevajra Tantra and so forth.
他先后领受了知识宝藏、宝性论、甚深内义、喜金刚续…等口诀教授。
In whom all the treasures of wisdom and knowledge are hidden.
3一切智慧和知识的宝藏，都藏在?里面。
Col. 2:3 In whom all the treasures of wisdom and knowledge are hidden.
西二3一切智慧和知识的宝藏，都藏在他里面。
Tacit knowledge is a treasure-house of library waiting for digging.
隐性知识是图书馆一个亟待挖掘的宝藏。
a quarry of information
知识的源泉 [宝库]
He communicates his own joy of learning, and shares with boys and girls the best treasures of the mind.
他向学子们传达自己学习的乐趣并与他们分享知识的宝藏。
The cross on the treasure map marks the location of the booty.
寻宝图上的十字标识出了宝藏的地点。
I wonder what treasures are hidden in here,@ she thought to herself.
“不知道这里面藏了什么宝藏，”她寻思道。
The library is a treasure house of knowledge.
图书馆是知识的宝库。
Knowledge be a treasure , but practice be the key to It .
知识是宝库，实践是钥匙。
Changing “Treasure-house of Ideas” to “Fountains of Knowledge”;
“知识宝库”向“知识喷泉”的转变
The goal of the game is to travel around the world to learn the history of each place and use this knowledge to open the treasure box.
这个游戏的目的是周游世界以便学到各个地方的历史,然后使用这些知识来打开宝藏盒子.
The goal of the game is to travel around the world to learn the history of each place, then use this knowledge to open the treasure box.
这个游戏的目的是周游世界来学习每个地方的历史，然后用所学知识打开这个宝藏箱。
Safety and Application Research of Hiding Knowledge-Hiding Law
隐藏知识—隐藏规律的安全与应用研究
Knowledge is a treasue, but practice is the key to it.
知识是一座宝库，而实践是开启这宝库的钥匙。
Knowledge is a treasure, but practice is the key.
知识是座宝库，而实践是开启宝库的钥匙。
The knowledge is the treasure house , however the practice is the key to the treasure house.
知识是宝库，而实践就是开启宝库大门的钥匙。
Knowledge is a treasure; but practice is the key to it. --Thomas Fuller
知识是一座宝库，而实践就是开户宝库钥匙。——富勒