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Accuracy and speed are the two most important metrics for Network Intrusion Detection/Prevention Systems (NIDS/NIPSes). Due to emerging polymorphic attacks and the fact that in many cases regular expressions (regexes) cannot capture the vulnerability conditions accurately, the accuracy of existing regex-based NIDS/NIPS systems has become a serious problem.(More)
– Accuracy and speed are the two most important metrics for Network Intrusion Detection or Prevention Systems (NIDS/NIPSes). Due to emerging poly-morphic attacks and the fact that in many cases regular expressions (regexes) cannot capture the vulnerability conditions accurately, the accuracy of existing regex-based NIDS/NIPS systems has become a serious(More)
Deep Packet Inspection (DPI) relies highly on regular expression due to its power of description, generalization and flexibility. In DPI, packet payload is compared against a large number of rules written in regular expression. To achieve high throughput, multiple regular expressions are combined and compiled into one DFA, which leads to two problems: a)(More)
A* algorithm is widely used in the game for diameter, is currently one of the more popular heuristic search algorithm, but the algorithm has the problem of searching time and path. In this paper, a bidirectional search A* algorithm is proposed to improve the search efficiency and ensure the accuracy of the search, and effectively solve the problem of path(More)
In this paper, photovoltaic maximum power point tracking (MPPT) algorithm based on duty cycle disturbing method is improved with a modified self-adopting step value calculation algorithm, the convergence of this modified tracking algorithm is speeded up compared with the original one and in the same time, numeric oscillation in the calculation process is(More)
The objective of this study is to investigate the characteristics and influencing factors of phosphorus leaching. The processes of phosphorus leaching of four typical soils (red soil, alluvial soil and purple soil) in Hunan are studied through the simulated leaching method by adding CaCl<sub>2</sub> solution with phosphorus of different concentration. The(More)
Vacuum freeze dryer vapor captor was taken as the study object, and a mathematical model of freeze dryer vapor captor heat transfer process was established to simulate and analyze heat transfer process. In the condition of low temperature and low pressure, influence of frosting in vapor captor heat transfer process was researched, the varied rule of(More)
To establish trust within innovation teams of scientists and technicians working on large-scale projects is considered an critical factor for the successful compeletion of the project when working in a virtual environment. To build trust among team members for any project requires a selection decision on which trust factors will best achieve the goals of(More)