1,942 research outputs found
Understanding and Implementation of Case Teaching Method
As a kind of teaching method, case teaching method has its own practical value and scope of application. In practice, it mainly consists of some links such as “knowledge preparation”, “case arrangement” and “provoking guidance”. Knowledge preparation could be implemented through a variety of forms and the teaching process that is prepared for analysis has its unique feature. Cases can be selected from the aspects of “event level”, “fact capacity” and “understanding degree”. And they would endow natural events with the educational significance. Setting questions teachers could stimulate students’ interest of analysis. And during the process of analysis, it is supposed to lead students use topic concept to analyze these questions around the cases
Fusion-Eval: Integrating Evaluators with LLMs
Evaluating Large Language Models (LLMs) is a complex task, especially
considering the intricacies of natural language understanding and the
expectations for high-level reasoning. Traditional evaluations typically lean
on human-based, model-based, or automatic-metrics-based paradigms, each with
its own advantages and shortcomings. We introduce "Fusion-Eval", a system that
employs LLMs not solely for direct evaluations, but to skillfully integrate
insights from diverse evaluators. This gives Fusion-Eval flexibility, enabling
it to work effectively across diverse tasks and make optimal use of multiple
references. In testing on the SummEval dataset, Fusion-Eval achieved a Spearman
correlation of 0.96, outperforming other evaluators. The success of Fusion-Eval
underscores the potential of LLMs to produce evaluations that closely align
human perspectives, setting a new standard in the field of LLM evaluation
Realizing bending waveguides with anisotropic epsilon-near-zero metamaterials
We study metamaterials with an anisotropic effective permittivity tensor in
which one component is near zero. We find that such an anisotropic metamaterial
can be used to control wave propagation and construct almost perfect bending
waveguides with a high transmission rate (>95%). This interesting effect
originates in the power flow redistribution by the surface waves on the input
and output interfaces, which smoothly matches with the propagating modes inside
the metamaterial waveguide. We also find that waves in such anisotropic
epsilon-near-zero materials can be reflected by small-sized perfect magnetic
conductor defects. Numerical calculations have been performed to confirm the
above effects
Analytical results for the superflow of spin-orbit-coupled Bose-Einstein condensates in optical lattices
In this paper, we show that for sufficiently strong atomic interactions,
there exist analytical solutions of current-carrying nonlinear Bloch states at
the Brillouin zone edge to the model of spin-orbit-coupled Bose-Einstein
condensates (BECs) with symmetric spin interaction loaded into optical
lattices. These simple but generic exact solutions provide an analytical
demonstration of some intriguing properties which have neither an analog in the
regular BEC lattice systems nor in the uniform spin-orbit-coupled BEC systems.
It is an analytical example for understanding the superfluid and other related
properties of the spin-orbit-coupled BEC lattice systems.Comment: 9 pages, 6 figure
Uformer: A Unet based dilated complex & real dual-path conformer network for simultaneous speech enhancement and dereverberation
Complex spectrum and magnitude are considered as two major features of speech
enhancement and dereverberation. Traditional approaches always treat these two
features separately, ignoring their underlying relationship. In this paper, we
propose Uformer, a Unet based dilated complex & real dual-path conformer
network in both complex and magnitude domain for simultaneous speech
enhancement and dereverberation. We exploit time attention (TA) and dilated
convolution (DC) to leverage local and global contextual information and
frequency attention (FA) to model dimensional information. These three
sub-modules contained in the proposed dilated complex & real dual-path
conformer module effectively improve the speech enhancement and dereverberation
performance. Furthermore, hybrid encoder and decoder are adopted to
simultaneously model the complex spectrum and magnitude and promote the
information interaction between two domains. Encoder decoder attention is also
applied to enhance the interaction between encoder and decoder. Our
experimental results outperform all SOTA time and complex domain models
objectively and subjectively. Specifically, Uformer reaches 3.6032 DNSMOS on
the blind test set of Interspeech 2021 DNS Challenge, which outperforms all
top-performed models. We also carry out ablation experiments to tease apart all
proposed sub-modules that are most important.Comment: Accepted by ICASSP 202
SiRA: Sparse Mixture of Low Rank Adaptation
Parameter Efficient Tuning has been an prominent approach to adapt the Large
Language Model to downstream tasks. Most previous works considers adding the
dense trainable parameters, where all parameters are used to adapt certain
task. We found this less effective empirically using the example of LoRA that
introducing more trainable parameters does not help. Motivated by this we
investigate the importance of leveraging "sparse" computation and propose SiRA:
sparse mixture of low rank adaption. SiRA leverages the Sparse Mixture of
Expert(SMoE) to boost the performance of LoRA. Specifically it enforces the top
experts routing with a capacity limit restricting the maximum number of
tokens each expert can process. We propose a novel and simple expert dropout on
top of gating network to reduce the over-fitting issue. Through extensive
experiments, we verify SiRA performs better than LoRA and other mixture of
expert approaches across different single tasks and multitask settings
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