504 research outputs found
Challenges and opportunities of Sino-Japan FTA
Die Masterarbeit behandelt die positiven und negativen Auswirkungen eines FTA (Freihandelsabkommen) zwischen China und Japan auf die wichtigsten Industrien der beiden LĂ€nder, und erlĂ€utert wie man die negativen Auswirkungen verringern und die wirtschaftliche Zusammenarbeit zwischen den beiden LĂ€ndern, sowie in der ganzen Region fördern kann.The present paper deals with the positive and negative impacts of a Sino-Japan FTA on both countriesâ major industries, and elaborates on how to reduce the negative impacts and promote economic cooperation between the two countries, and even cooperation in the entire region
Underwater target recognition method based on t-SNE and stacked nonnegative constrained denoising autoencoder
1822-1832Underwater targets recognition is a difficult task due to the specific attributes of underwater target radiated noises, low signal to noise ratio and so on. In this paper, the input data optimization method and recognition model were researched. The underwater target radiated noise spectrum was chosen as the original feature. The t-distributed stochastic neighbor embedding (t-SNE) algorithm was used to reduce the dimensionality of the original spectrum segments divided by frequency. The optimal features can be obtained by analyzing the separability. Then the stacked nonnegative constrained denoising autoencoder (SNDAE) model was established to recognize the optimal features. The experimental signal spectra were processed by above methods. The results show that the recognition accuracy of SNDAE is higher than that of other contrastive methods. And the frequency of input band with the highest recognition accuracy is approximately the same as that with the best separability based on t-SNE, indicating that the above method can improve the recognition accuracy and efficiency
Improved bounds on the size of the smallest representation of relation algebra with the aid of a SAT solver
In this paper, we shed new light on the spectrum of relation algebra
. We show that 1024 is in the spectrum, and no number smaller than 20
is in the spectrum. In addition, we derive upper and lower bounds on the
smallest member of the spectra of an infinite class of algebras derived from
via splitting.Comment: 14 page
Adaptive absorbing boundary conditions for Schrodinger-type equations: application to nonlinear and multi-dimensional problems
We propose an adaptive approach in picking the wave-number parameter of
absorbing boundary conditions for Schr\"{o}dinger-type equations. Based on the
Gabor transform which captures local frequency information in the vicinity of
artificial boundaries, the parameter is determined by an energy-weighted method
and yields a quasi-optimal absorbing boundary conditions. It is shown that this
approach can minimize reflected waves even when the wave function is composed
of waves with different group velocities. We also extend the split local
absorbing boundary (SLAB) method [Z. Xu and H. Han, {\it Phys. Rev. E},
74(2006), pp. 037704] to problems in multidimensional nonlinear cases by
coupling the adaptive approach. Numerical examples of nonlinear Schr\"{o}dinger
equations in one- and two dimensions are presented to demonstrate the
properties of the discussed absorbing boundary conditions.Comment: 18 pages; 12 figures. A short movie for the 2D NLS equation with
absorbing boundary conditions can be downloaded at
http://home.ustc.edu.cn/~xuzl/movie.avi. To appear in Journal of
Computational Physic
Dialogue State Distillation Network with Inter-Slot Contrastive Learning for Dialogue State Tracking
In task-oriented dialogue systems, Dialogue State Tracking (DST) aims to
extract users' intentions from the dialogue history. Currently, most existing
approaches suffer from error propagation and are unable to dynamically select
relevant information when utilizing previous dialogue states. Moreover, the
relations between the updates of different slots provide vital clues for DST.
However, the existing approaches rely only on predefined graphs to indirectly
capture the relations. In this paper, we propose a Dialogue State Distillation
Network (DSDN) to utilize relevant information of previous dialogue states and
migrate the gap of utilization between training and testing. Thus, it can
dynamically exploit previous dialogue states and avoid introducing error
propagation simultaneously. Further, we propose an inter-slot contrastive
learning loss to effectively capture the slot co-update relations from dialogue
context. Experiments are conducted on the widely used MultiWOZ 2.0 and MultiWOZ
2.1 datasets. The experimental results show that our proposed model achieves
the state-of-the-art performance for DST.Comment: Accepted by AAAI 202
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