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A multi-class method is proposed based on Error
Correcting Output Codes algorithm in order to get better performance of attack
recognition in Wireless Sensor Networks. Aiming to enhance the accuracy of
attack detection, the multi-class method is constructed with Hadamard matrix and two-class Support Vector Machines. In order to minimize the
complexity of the algorithm, sparse coding method is applied in this paper. The
comprehensive experimental results show that this modified multi-class method
has better attack detection rate compared with
other three coding algorithms, and its
time efficiency is higher than Hadamard coding algorithm.
analysis of the sliding failure form of soil mass under the bearing push-extend
reamed of Push-extend Multi-under-reamed Pile, in the paper, the law of coulomb-Mohr
is used to establish a stress function and the theory of the sliding line is
used to establish Prandtl regional stress field, which determines the stress
calculating mode of soil mass and provides a theoretical basis for a further
study of this type of pile ultimate bearing capacity of soil mass.
The backbone of D-glucosamine hydrochloride
was fine-tuned and modified by protecting the hydroxyl groups. In order to
reduce imines with trichlorosilane, the carbohydrate-derived organocatalysts
were prepared and screened. Methyl-4,6-O-benzylidene-2-amino-2-deoxy-α-D-glucopyr
anoside was found as the best catalyst. The reduction was proceeded under CHCl3
as solvent at 40?C, affording 68% - 94% yield.