6,764 research outputs found
(Z)-4-Amino-1,2,5-oxadiazole-3-carboxamide oxime
The asymmetric unit of the title compound, C3H5N5O2, contains three crystallograpically independent molecules. In the crystal structure, intermolecular N—H⋯N, N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds link the molecules into a three-dimensional network
Bis(quinolin-8-ol)silver(I) 2-hydroxy-3,5-dinitrobenzoate
The title compound, [Ag(C9H7NO)2](C7H3N2O7), was prepared from 3,5-dinitrosalicylic acid (DNS), quinolin-8-ol and AgNO3. The AgI atom is coordinated by two N atoms and two O atoms from two quinolin-8-ols in a roughly planar [maximum deviation = 0.223 (2) Å] environment. The two quinolin-8-ol ligands are bent slightly with respect to each other, making a dihedral angle of 9.55 (9)°. The DNS anion interacts with the silver complex through O—H⋯O hydrogen bond
Design of Block Transceivers with Decision Feedback Detection
This paper presents a method for jointly designing the transmitter-receiver
pair in a block-by-block communication system that employs (intra-block)
decision feedback detection. We provide closed-form expressions for
transmitter-receiver pairs that simultaneously minimize the arithmetic mean
squared error (MSE) at the decision point (assuming perfect feedback), the
geometric MSE, and the bit error rate of a uniformly bit-loaded system at
moderate-to-high signal-to-noise ratios. Separate expressions apply for the
``zero-forcing'' and ``minimum MSE'' (MMSE) decision feedback structures. In
the MMSE case, the proposed design also maximizes the Gaussian mutual
information and suggests that one can approach the capacity of the block
transmission system using (independent instances of) the same (Gaussian) code
for each element of the block. Our simulation studies indicate that the
proposed transceivers perform significantly better than standard transceivers,
and that they retain their performance advantages in the presence of error
propagation.Comment: 14 pages, 8 figures, to appear in the IEEE Transactions on Signal
Processin
{μ2-1,4-Bis[2-(4-pyridyl)ethenyl]benzene-κ2 N:N′}bis[bis(acetylacetonato-κ2 O,O′)copper(II)]
The asymmetric unit of the title compound, [Cu2(C5H7O2)4(C20H16N2)], contains half of a centrosymmetric dinuclear molecule. In the molecule, each Cu center is coordinated by four O atoms from two acetylacetonate ligands and one N atom from the bridging linear 1,4-bis[2-(4-pyridyl)ethenyl]benzene ligand in a square-pyramidal geometry. In the crystal structure, weak intermolecular C—H⋯O hydrogen bonds link molecules into sheets parallel to the bc plane
Latent Embeddings for Collective Activity Recognition
Rather than simply recognizing the action of a person individually,
collective activity recognition aims to find out what a group of people is
acting in a collective scene. Previ- ous state-of-the-art methods using
hand-crafted potentials in conventional graphical model which can only define a
limited range of relations. Thus, the complex structural de- pendencies among
individuals involved in a collective sce- nario cannot be fully modeled. In
this paper, we overcome these limitations by embedding latent variables into
feature space and learning the feature mapping functions in a deep learning
framework. The embeddings of latent variables build a global relation
containing person-group interac- tions and richer contextual information by
jointly modeling broader range of individuals. Besides, we assemble atten- tion
mechanism during embedding for achieving more com- pact representations. We
evaluate our method on three col- lective activity datasets, where we
contribute a much larger dataset in this work. The proposed model has achieved
clearly better performance as compared to the state-of-the- art methods in our
experiments.Comment: 6pages, accepted by IEEE-AVSS201
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