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The accidents occurred in chemical plants often regard as low frequency and high consequence. It is necessary to raise the risk analysis for the petrochemical system to help people to find the weakest process in the whole system thus people can strength the process to improve the safety. In this paper, a methodology by using Bayesian Networks (BNs) to give a model for a chemical plant has been raised...
CaCu3Ti4O12 ceramics were synthesized by using the solid-state reaction method, and the roles of the heat treatment on the microstructure and dielectric properties were investigated. It is indicated that no second phase is found after heat treatment. At room temperature, the dielectric constant is decreased slightly and the dielectric loss tangent is effectively suppressed to 0.03–0.04. In the temperature...
In this work, CaCu3Ti4O12 ceramics were synthesized to investigate the influence of dc degradation on the dielectric response. Two dielectric relaxation processes related to grain and domain boundaries appearing at low temperature were fitted according to Debye theory. It was found that the dc conductance loss at low frequency was greatly increased after dc degradation. The relaxation behaviors of...
DNA sequences recognition is a key problem in bioinformatics and biomedical informatics. In this paper, we solve this problem by use of the probability method and metric instead of traditional frequency metric because the characters in DNA alphabet set meet the Markov properties. For this purpose, transition probabilities, transition matrixes, and log odds ratios are defined. And then, we put forward...
Pattern matching is a fundamental application text retrieval, string query, biological sequence analysis, etc. Therefore, the effective algorithm performing this kind of matching is in great need. In this paper, the wildcard is defines to match any one character in a sequence. Multiple wildcards form a gap. The length of a flexible gap is arbitrary. We design CLPM algorithm by use of cross list index...
In many works about sequence pattern mining, pattern frequency is defined as the number of pattern occurrences divided by the number of offset sequences. However, the Apriori property does not hold. In this paper, we review the definition of the number of offset sequences to make uninteresting patterns no longer frequent, and the Apriori property holds. Moreover, the computation of the number of offset...
Pattern mining is a popular issue in biological sequence analysis. With the introduction of wildcard gaps, more interesting patterns can be mined. In this paper, we consider a pattern mining problem where pattern frequency is the only evaluation metric. Theoretical analysis shows that the most frequent patterns are inflexible. Experimental results on DNA sequences also validate this analysis.
Pattern matching is critical in some applications such as biological sequence analysis and text filtering. A wildcard gap matches any subsequence with a length in a specified interval, and introduces much adaptability to patterns. However, most existing works require that gaps in a pattern be identical. In this paper, we define a new pattern matching problem where gaps are independently specified...
Pattern mining is a popular issue in biological sequence analysis. In this paper, we propose new definitions related to the pattern frequency, where gaps are mined instead of specified. We develop algorithm with polynomial complexities. Patterns can grow from both sides, and Apriori property holds. Some interesting biological patterns are mined by our algorithm.
Ozone is a strong oxidizer and antiseptic. The efficacy of ozone to reduce bacterial populations in the presence of substance of citrus fruits has been studied here, included a Gram-positive bacterium, a Gram-negative bacterium and a spore former. The suspension quantitative bactericidal test was carried out. Five substrates, that were respectively sterile Class C buffer, 1% sucrose solutions, 1%...
Recent developments in the field of transmission line monitoring system have led to a renewed interest in wireless sensor networks, which is characterized by the strong real time, high reliability, adaptability, load balancing and so on. However, the bottleneck problem of network transmission which is likely to occur around the sink node must be taken into account. This paper proposes a new cross-layer...
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