In the last decades, action recognition task has evolved from single view recording to unconstrained environment. Recently, multi-view action recognition has become a hot topic in computer vision. However, we notice that only a few works have focused on the open-view action recognition, which is a common problem in the real world. Open-view action recognition focus on doing action recognition in unseen view without using any information from it. To address this issue, we firstly introduce a novel multi-view surveillance action dataset and benchmark several state-of-the-art algorithms. From the results, we observe that the performance of the state-of-the-art algorithms would drop a lot under open-view constraints. Then, we propose a novel open-view action recognition method based on the linear discriminant analysis. This method can learn a common space for action samples under different view by using their category information, which can achieve a good result in open-view action recognition.
Detonation experiments were performed in a specially developed explosive device simulating a blasthole using charges of fine-grained
and coarse-grained (granular) 30/70 TNT/ammonium nitrate mixtures of identical density 0.89 g/cm3 in steel shells with an inner diameter of 28 mm and a wall thickness of 3 mm at detonation velocities of 4.13 and 2.13 km/sec,
respectively. Despite significant differences in detonation velocity (pressure), identical expansion of the charge shells
was observed. On the other hand, numerical simulations of detonation propagation in the explosive device with the corresponding
velocities ignoring the possibility of energy release behind the shock front show that the expansion of the charge shell is
always greater in the case of a high-velocity regime. It is concluded that under the conditions simulating detonation propagation
and the work of explosion products in a blasthole, effective additional energy release occurs behind the low-velocity (nonideal)
detonation front.
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Translated from Fizika Goreniya i Vzryva, Vol. 43, No. 4, pp. 111–120, July–August, 2007. 相似文献
Sequence analysis of a cDNA for D-erythrulose reductase fromchicken liver showed that the deduced open reading frame encodesthe protein with a molecular mass of 26 kDa consisting of 246amino acids. Although the reductase shares more than 60% identityin the amino acid sequence with the mouse tetrameric carbonylreductase, these two enzymes have many biochemical differences;their substrate specificity, subcellular localization, organdistribution, etc. A three-dimensional structure of D-erythrulosereductase was predicted by comparative modeling based on thestructure of the tetrameric carbonyl reductase (PDB entry =1CYD). Most of the residues at the active site (within 4 Åfrom the ligand) of the carbonyl reductase were also conservedin the D-erythrulose reductase. Nevertheless, Val190 and Leu146in the active site of the tetrameric carbonyl reductase weresubstituted in the D-erythrulose reductase by Asn192 and His148,respectively. The substitutions in the active sites may be relatedto the difference in substrate specificity of the two enzymes.The phylogenic analysis of D-erythrulose reductase and the otherrelated proteins suggests that the protein described as a carbonylreductase D-erythrulose reductase. 相似文献
The reduction of Np(V) with hydrazine in HNO3 solution in the presence of Ru/SiO2 catalysts was studied by spectrophotometry. The back oxidation of Np(IV) with nitric acid, also catalyzed by ruthenium, occurs concurrently with the Np(V) reduction with hydrazine. The contribution of each process is determined by the HNO3 concentration. The mechanism of the ruthenium-catalyzed reduction of Np(V) with hydrazine was suggested on the basis of the kinetic data. The effect of the size of Ru nanoparticles on the activation energy of the catalytic reduction of Np(V), characterizing the structural sensitivity of the heterogeneous-catalytic reaction (positive size effect), was revealed. 相似文献
Oxidation of Np(IV) with nitric acid in the presence of Ru/SiO2 catalysts was studied by spectrophotometry. The catalytic oxidation of Np(IV) in nitric acid solutions occurs even in the presence of hydrazine. The mechanism of Ru-catalyzed oxidation of Np(IV) with nitric acid was suggested on the basis of the kinetic data. The effect of the Ru nanoparticle size on the activation energy of the catalytic oxidation of Np(IV) was revealed. It shows that the heterogeneous-catalytic reaction is structure-sensitive (positive size effect). 相似文献
Journal of Computer and Systems Sciences International - This paper considers a system consisting of a carrier body and two linear dissipative oscillators attached to it. The body moves in a... 相似文献