77 research outputs found
Learning Dynamical Demand Response Model in Real-Time Pricing Program
Price responsiveness is a major feature of end use customers (EUCs) that
participate in demand response (DR) programs, and has been conventionally
modeled with static demand functions, which take the electricity price as the
input and the aggregate energy consumption as the output. This, however,
neglects the inherent temporal correlation of the EUC behaviors, and may result
in large errors when predicting the actual responses of EUCs in real-time
pricing (RTP) programs. In this paper, we propose a dynamical DR model so as to
capture the temporal behavior of the EUCs. The states in the proposed dynamical
DR model can be explicitly chosen, in which case the model can be represented
by a linear function or a multi-layer feedforward neural network, or implicitly
chosen, in which case the model can be represented by a recurrent neural
network or a long short-term memory unit network. In both cases, the dynamical
DR model can be learned from historical price and energy consumption data.
Numerical simulation illustrated how the states are chosen and also showed the
proposed dynamical DR model significantly outperforms the static ones.Comment: Accepted to IEEE ISGT NA 201
Single scalar top production with polarized beams in ep collisions at HERA
From the point of view of the R-parity breaking supersymmetric model, we
propose a scalar top (stop) search with longitudinally polarized electron (e-)
and positron(e+) beams which will soon be available at the upgraded HERA. Fully
polarized e- or e+ beams could produce the stop two times as much as
unpolarized beams, while they increase background events due to the process of
the standard model by about 30% in comparison with unpolarized ones. We show
that right-handed e+ beams at HERA is efficient to produce the stop in the
model. With 1 fb**(-1) of integrated luminosity we estimate reach in the
coupling constant lambda'(131) for masses of the stop in the range 160-400 GeV.
We can set a 95% confidence-level exclusion limit for lambda'(131) > 0.01-0.05
in the stop mass range of 240-280 GeV if no singal of the stop is observed. We
also point out that y(=Q**2/sx) distributions of e+ coming from the stop shows
the different behavior from those of the standard model.Comment: 12 pages, 6 eps figure
Is a high muon of the event observed at HERA a signature of the stop?
We investigate the event with high transverse momenta
observed at HERA (H1) and show that this event could be interpreted as a
signature of the single production of the scalar top quark in a supersymmetric
model with -parity breaking interactions. The event topology of the H1 event
is rather characteristic and in fact it can be simulated by our specific
scenario if we reasonably choose our model parameters to be ({\romannumeral 1})
TeV [TeV] for
[] and ({\romannumeral 2})
GeV, GeV
GeV and
.Comment: 8 pages, LaTeX, 4 figures (included in a separate .uu file
Single Sbottom/Scharm Production at HERA in an R-Parity Breaking Supersymmetric Model
We investigate the production process of the single scalar bottom quark
(sbottom) and scalar charm quark (scharm) at HERA. The sbottom and scharm could
be produced via an R-parity breaking interactions in
the Minimal Supersymmetric Standard Model (MSSM). These processes give a slight
excess in the invariant mass distribution of the high deep
inelastic scattering for sufficiently heavy gauginos and the scalar top (stop).
For the light gauginos and stop, it is shown that the tagging of -quarks
and charged leptons with high transverse energies will be indispensable to
search for the processes.Comment: 11 pages, 4 figures Added reference
Factors associated with the use of dietary supplements and over-the-counter medications in Japanese elderly patients
Functional tooth number and mortality
Aim: Previous studies on the association between intraoral conditions and mortality in community-dwelling older individuals reported that fewer present teeth (PT) are significant risk factors for mortality. However, how the number of PT relative to the number of functional teeth (FT), including both present and rehabilitated teeth, influences mortality has not been investigated fully. This study examined the impact of the number of FT on mortality among community-dwelling Japanese older adults.
Methods: This study was a retrospective, observational and population-based follow-up study, which examined 1188 older individuals who participated in an annual geriatric health examination from 2009 to 2015. The average follow-up period was 1697.0 ± 774.5 days. The primary outcome was all-cause mortality at follow-up. The numbers of PT and FT of each participant were counted during an oral examination. In addition, demographics, clinical variables, blood nutrient markers, physical functions and perceived masticatory function were measured.
Results: Kaplan–Meier analysis, followed by a log-rank test, revealed that fewer PT (P < 0.001) and FT (P = 0.002) were significantly associated with a reduced survival rate. Cox's proportional hazard analysis indicated that the number of FT, but not the number of PT, was a significant independent mortality risk factor after adjusting for demographics, clinical variables, nutrient markers and physical functioning (P = 0.036, hazard ratio: 2.089).
Conclusions: Current results suggest that the number of FT more strongly predicts all-cause mortality than the number of PT among community-dwelling older adults. Further studies are necessary to consider the confounding of socioeconomic status and disability status
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