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In Linux Address Space layout Randomization, not all memory addresses are random. Executable Program is still loaded to a static address, so an attacker can do code reuse attack by using gadgets in executable program code segment. To improve the weaken ASLR, this paper proposes and implements a new protection method named EPCSAR (Executable Program Code Segment Address Randomization). Taking advantage...
Which attributes are the basic ones when we describe the rational agent's internal states? How many attributes are sufficient enough for application? Those have been pending problems. This paper analyzes the limitations of the past research in this field, presents rational agent's attributes of KOCBDI and illustrates, by means of simulated RoboCup, that KOCBDI is independent.
Lucene is currently and has been for a few years, the most popular free Java full-text retrieval library. Firstly, this article analyzes Lucence system structure, indexing mechanism, searching mechanism; secondly, it studies the sorting technology and how to adjust indexing performance; finally, the article presents a new retrieval sorting algorithm.
A logic optimization algorithm of logic function based on mini-terms is presented. It can find the implement covering by computing on-sets covering and generate the implicants which can cover the on-sets without computing prime implicants. It can reduce the spending memory. We designed and realized a software system on Boolean function logic optimization with max-input variables 128, max-output variables...
This paper presents an expanding products algorithm of logic optimization that is based on multi-input multi-output logic functions. According to input products, we work out complement sets matrix of non-shared products, blocking matrix, covering matrix. For blocking matrix and covering matrix, we get mini column cover sets and upgrade sets based on choice algorithm of mini column cover. Then we form...
A new method is presented to mine weight information from a triangular fuzzy number preference relation. Firstly, some new concepts about additive consistency are defined. Secondly, the triangular fuzzy number preference relation is transformed to some interval fuzzy preference relations by different reg-level sets. Four models are established to acquire different weight vectors. Thirdly, the final...
The visualization of medical volumetric data is an important area of scientific visualization. 3-D segmentation plays a critical role by facilitating automatic or semi-automatic extraction of the anatomical organ or region-of-interest. Segmentation s an important aspect of medical image processing, whose purpose is to extract the region of interest from the original images to provide a reliable basis...
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