Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meta-neural-network for Realtime and Passive Deep-learning-based Object
  Recognition   Deep-learning recently show great success across disciplines yet
conventionally require time-consuming computer processing or bulky-sized
diffractive elements. Here we theoretically propose and experimentally
demonstrate a purely-passive "meta-neural-network" with compactness and
high-resolution for real-time recognizing complicated objects by analyzing
acoustic scattering. We prove our meta-neural-network mimics standard neural
network despite its small footprint, thanks to unique capability of its
metamaterial unit cells, dubbed "meta-neurons", to produce
deep-subwavelength-distribution of discrete phase shift as learnable parameters
during training. The resulting device exhibits the "intelligence" to perform
desired tasks with potential to address the current trade-off between reducing
device's size, cost and energy consumption and increasing recognition speed and
accuracy, showcased by an example of handwritten digit recognition. Our
mechanism opens the route to new metamaterial-based deep-learning paradigms and
enable conceptual devices such as smart transducers automatically analyzing
signals, with far-reaching implications for acoustics, optics and related
fields.

10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph