846 research outputs found
Automatic Article Commenting: the Task and Dataset
Comments of online articles provide extended views and improve user
engagement. Automatically making comments thus become a valuable functionality
for online forums, intelligent chatbots, etc. This paper proposes the new task
of automatic article commenting, and introduces a large-scale Chinese dataset
with millions of real comments and a human-annotated subset characterizing the
comments' varying quality. Incorporating the human bias of comment quality, we
further develop automatic metrics that generalize a broad set of popular
reference-based metrics and exhibit greatly improved correlations with human
evaluations.Comment: ACL2018; with supplements; Dataset link available in the pape
A new dabco-templated metal sulfate: 1,4-diazoniabicyclo[2.2.2]octane hexaaquacadmium bis(sulfate)
The title double molecular salt, (C6H14N2)[Cd(H2O)6](SO4)2, is an isostructure of its Mn and Co analogues. The CdII atom adopts a near-regular CdO6 octahedral coordination geometry. The crystal structure can be described as an alternation of cationic and anionic layers along [010], and numerous O—H⋯O and N—H⋯O hydrogen bonds are observed. No thermal anomalies corresponding to possible phase transitions were observed in DSC (differential scanning calorimetry) measurements and the 93 K structure is almost the same as the room-temperature structure
Design Change Model for Effective Scheduling Change Propagation Paths
Changes in requirements may result in the increasing of product development project cost and lead time, therefore, it is important to understand how requirement changes propagate in the design of complex product systems and be able to select best options to guide design. Currently, a most approach for design change is lack of take the multi-disciplinary coupling relationships and the number of parameters into account integrally. A new design change model is presented to systematically analyze and search change propagation paths. Firstly, a PDS-Behavior-Structure-based design change model is established to describe requirement changes causing the design change propagation in behavior and structure domains. Secondly, a multi-disciplinary oriented behavior matrix is utilized to support change propagation analysis of complex product systems, and the interaction relationships of the matrix elements are used to obtain an initial set of change paths. Finally, a rough set-based propagation space reducing tool is developed to assist in narrowing change propagation paths by computing the importance of the design change parameters. The proposed new design change model and its associated tools have been demonstrated by the scheduling change propagation paths of high speed train’s bogie to show its feasibility and effectiveness. This model is not only supportive to response quickly to diversified market requirements, but also helpful to satisfy customer requirements and reduce product development lead time. The proposed new design change model can be applied in a wide range of engineering systems design with improved efficiency
Quantum Alternating Operator Ansatz for Solving the Minimum Exact Cover Problem
The minimum exact cover (MEC) is a common combinatorial optimization problem,
with wide applications in tail-assignment and vehicle routing. In this paper,
we adopt quantum alternating operator ansatz (QAOA+) to solve MEC problem. In
detail, to obtain a trivial feasible solution, we first transform MEC into a
constrained optimization problem with two objective functions. Then, we adopt
the linear weighted sum method to solve the above constrained optimization
problem and construct the corresponding target Hamiltonian. Finally, to improve
the performance of this algorithm, we adopt parameters fixing strategy to
simulate, where the experimental instances are 6, 8, and 10 qubits. The
numerical results show that the solution can be obtained with high probability
when level of the algorithm is low. Besides, we optimize the quantum
circuit by removing single-qubit rotating gates . We found that the number
of quantum gates is reduced by for -level optimized circuit.
Furthermore, -level optimized circuit only needs parameters, which can
achieve an experimental effect similar to original circuit with
parameters
4-(3-Carboxy-1-ethyl-6-fluoro-4-oxo-1,4-dihydroquinolin-7-yl)piperazin-1-ium 4-carboxybenzoate–benzene-1,4-dicarboxylic acid (2/1)
In the title compound, C16H19FN3O3
+·C8H5O4
−·0.5C8H6O4, the benzene-1,4-dicarboxylic acid molecule is located on a centre of symmetry. In the crystal, the molecules and ions are connected by intermolecular C—H⋯O and O—H⋯O hydrogen bonds and π–π stacking interactions [with a centroid–centroid distance of 3.402 (2) Å], generating a three-dimensional supramolecular structure
Australobius polyspinipes sp. n., a new species of Australobius Chamberlin, 1920 (Lithobiomorpha: Lithobiidae) from China
Australobius polyspinipes sp. n. (Lithobiomorpha: Lithobiidae) was recently discovered from Tianheshan Mountain, Hebei Province, China, and it is described here. Morphologically the new species is similar to A. nodulus Ma, Song &Zhu, 2008 and A. magnus (Trozina, 1894), both recorded from China. The new species can be easily distinguished from those by having 7+7–8+8 coxosternal teeth, 10–12 ocelli on each side of the cephalic plate, 5+5 spurs on the first article of the female gonopods and differences in plectrotaxy of legs. The main morphological characters and a key to the known Chinese species of genus Australobius based on adult specimens is presented
Nonlinear Analysis of Auscultation Signals in TCM Using the Combination of Wavelet Packet Transform and Sample Entropy
Auscultation signals are nonstationary in nature. Wavelet packet transform (WPT) has currently become a very useful tool in analyzing nonstationary signals. Sample entropy (SampEn) has recently been proposed to act as a measurement for quantifying regularity and complexity of time series data. WPT and SampEn were combined in this paper to analyze auscultation signals in traditional Chinese medicine (TCM). SampEns for WPT coefficients were computed to quantify the signals from qi- and yin-deficient, as well as healthy, subjects. The complexity of the signal can be evaluated with this scheme in different time-frequency resolutions. First, the voice signals were decomposed into approximated and detailed WPT coefficients. Then, SampEn values for approximated and detailed coefficients were calculated. Finally, SampEn values with significant differences in the three kinds of samples were chosen as the feature parameters for the support vector machine to identify the three types of auscultation signals. The recognition accuracy rates were higher than 90%
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