Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adsorption-desorption noise can be used for improving selectivity   Small chemical sensors are subjected to adsorption-desorption fluctuations
which usually considered as noise contaminating useful signal. Based on
temporal properties of this noise, it is shown that it can be made useful if
proper processed. Namely, the signal, which characterizes the total amount of
adsorbed analyte, should be subjected to a kind of amplitude discrimination (or
level crossing discrimination) with certain threshold. When the amount is equal
or above the threshold, the result of discrimination is standard dc signal,
otherwise it is zero. Analytes are applied at low concentration: the mean
adsorbed amount is below the threshold. The threshold is achieved from time to
time thanking to the fluctuations. The signal after discrimination is averaged
over a time window and used as the output of the whole device. Selectivity of
this device is compared with that of its primary adsorbing sites, based on
explicit description of the threshold-crossing statistics. It is concluded that
the whole sensor may have much better selectivity than do its individual
adsorbing sites.

11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom