7,448 research outputs found
A Dependency-Based Neural Network for Relation Classification
Previous research on relation classification has verified the effectiveness
of using dependency shortest paths or subtrees. In this paper, we further
explore how to make full use of the combination of these dependency
information. We first propose a new structure, termed augmented dependency path
(ADP), which is composed of the shortest dependency path between two entities
and the subtrees attached to the shortest path. To exploit the semantic
representation behind the ADP structure, we develop dependency-based neural
networks (DepNN): a recursive neural network designed to model the subtrees,
and a convolutional neural network to capture the most important features on
the shortest path. Experiments on the SemEval-2010 dataset show that our
proposed method achieves state-of-art results.Comment: This preprint is the full version of a short paper accepted in the
annual meeting of the Association for Computational Linguistics (ACL) 2015
(Beijing, China
Case Histories of Poor Quality Contingency of Foundation Soil Improvement of 50,000 Kiloliters Oil Storage Tank
This paper introduces case histories of poor quality contingency of foundation soil improvement of 50,000 kiloliters oil storage tanks. Inhomogeneity of soft and hard soil layers in oil tank area, and in the process of construction, effective improvement measures had not been taken, and this produced bad effects to oil tank
Periodic Radio Variability in NRAO 530: Phase Dispersion Minimization Analysis
In this paper, a periodicity analysis of the radio light curves of the blazar
NRAO 530 at 14.5, 8.0, and 4.8 GHz is presented employing an improved Phase
Dispersion Minimization (PDM) technique. The result, which shows two persistent
periodic components of and years at all three frequencies,
is consistent with the results obtained with the Lomb-Scargle periodogram and
weighted wavelet Z-transform algorithms. The reliability of the derived
periodicities is confirmed by the Monte Carlo numerical simulations which show
a high statistical confidence. (Quasi-)Periodic fluctuations of the radio
luminosity of NRAO 530 might be associated with the oscillations of the
accretion disk triggered by hydrodynamic instabilities of the accreted flow.
\keywords{methods: statistical -- galaxies: active -- galaxies: quasar:
individual: NRAO 530}Comment: 8 pages, 5 figures, accepted by RA
B-Meson Light-Cone Distribution Amplitude From Euclidean Quantities
A new method for the model-independent determination of the light-cone distribution amplitude of the B-meson in heavy quark effective theory (HQET) is proposed by combining the large momentum effective theory and the numerical simulation technique on the Euclidean lattice. We demonstrate the autonomous scale dependence of the nonlocal quasi-HQET operator with the aid of the auxiliary field approach, and further determine the perturbative matching coefficient entering the hard-collinear factorization formula for the B-meson quasidistribution amplitude at the one-loop accuracy. These results will be crucial to explore the partonic structure of heavy-quark hadrons in the static limit and to improve the theory description of exclusive B-meson decay amplitudes based upon perturbative QCD factorization theorems
STUDY OF XIAO JUNFENG'S FRONT HANDSPRING TO SOMERSAULT FORWARD STRETCHED WITH 900 DEGREE TWIST BY BIOMECHANICAL ANALYSIS
It is well known that new and difficult performances occur constantly and stimulate the development of gymnastics. The focuses in performance are the connection and all kinds of somersault and twist technique. Lately, no matter whether in domestic or international competition, the front handspring to somersault with certain difficulty has been used frequently. It is worth mention that from 1993 to 1996 the international rules of gymnastics were changed, increasing the difficulty value of the front somersault. That means that the front somersault gets more points than the back somersault, even for a performance turn of the same degree. The front handspring connecting somersault forward stretched and twist performance is being concentrated on by coaches and athletics. Even some experts considered the front handspring to somersault forward stretched with twist performance as part of the future of free gymnastics. Xiao Junfeng was one of the athletes of the Chinese gymnastic team. He was the first athlete to perform the front handspring to somersault forward with a 900 degree twist. He won the title champion of the world gymnastics championships in 1997. The purpose of this study is to analyze the technique of his performance by biomechanical methods. The subject was Xiao Junfeng ( age: 17 years old, Height: 1.60 m, Weight: 50 kg). HUAHANG KS 16-mm camera and TP-301 film analysis systems and a KISTLER 3-dimensional testing force platform were use to collect the data of the front handspring to somersault forward stretched with a 900 degree twist performance
-meson light-cone distribution amplitude from the Euclidean quantity
A new method for the model-independent determination of the light-cone
distribution amplitude (LCDA) of the -meson in heavy quark effective theory
(HQET) is proposed by combining the large momentum effective theory (LaMET) and
the numerical simulation technique on the Euclidean lattice. We demonstrate the
autonomous scale dependence of the non-local quasi-HQET operator with the aid
of the auxiliary field approach, and further determine the perturbative
matching coefficient entering the hard-collinear factorization formula for the
-meson quasi-distribution amplitude at the one-loop accuracy. These results
will be crucial to explore the partonic structure of heavy-quark hadrons in the
static limit and to improve the theory description of exclusive -meson decay
amplitudes based upon perturbative QCD factorization theorems.Comment: 7 pages, 2 figure
Confirming the 115.5-day periodicity in the X-ray light curve of ULX NGC 5408 X-1
The Swift/XRT light curve of the ultraluminous X-ray (ULX) source NGC 5408
X-1 was re-analyzed with two new numerical approaches, Weighted Wavelet
-transform (WWZ) and CLEANest, that are different from previous studies.
Both techniques detected a prominent periodicity with a time scale of
days, in excellent agreement with the detection of the same
periodicity first reported by Strohmayer (2009). Monte Carlo simulation was
employed to test the statisiticak confidence of the 115.5-day periodicity,
yielding a statistical significance of (or ). The robust
detection of the 115.5-day quasi-periodic oscillations (QPOs), if it is due to
the orbital motion of the binary, would infer a mass of a few thousand
for the central black hole, implying an intermediate-mass black hole
in NGC 5408 X-1.Comment: 6 pages, 2 figures, submitted to Research in Astronomy and
Astrophysics (RAA
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