50 research outputs found
Fuzzy algorithm for situational control of urban transport traffic
The problem of operational dispatching control of urban transport is
considered on the example of fixed-route taxis. The analysis of passenger traffic is carried out on
the mathematical apparatus of the theory of queuing systems, within which a graph of states is
constructed and ratios are obtained to evaluate the main indicators of the quality of minibus taxis.
Due to the presence of information uncertainty in the work of urban transport, an algorithm of
fuzzy situational management is proposed, which is the basis of intellectual DSS. For an optimal
transition from the current situation to a situation that meets the new operating conditions, in the
sense of the selected criterion, it is proposed to use the dynamic programming method
Recognition of handwritten numbers based on convolutional neural networks
This article deals with the problem of practical implementation of
handwritten digit recognition based on convolutional neural networks (CNN). The CNN
architecture is presented and analyzed, for which it is recommended to use cross entropy as a
loss function during training, and the Softmax function as an activation function of the last
CNN layer. It is also recommended to use the well-known error back propagation algorithm
to implement the CNN learning algorithm. To do this, the article presents the main relations
for errors at each layer
Automation Of Making Innovative Decisions In Development Of City Infrastructure
An automated method for evaluating expert questionnaires proposed, in which the questionnaire considered as a linguo-numerical model of the city infrastructure object under study, which makes it possible to present it in a form convenient for automated processing in decision support systems (DSS) based on the proposed procedures
Stabilization of positioning points in the control system of industrial robots-manipulators
To stabilize the position of the grip of the manipulator at the working point
of positioning, a modal procedure for optimal adjustment of the parameters of the
proportional and differential parts of the multidimensional PID controller based on the
original method of uncertain coefficients is proposed. To eliminate the static error, it is
suggested to use the Davison method of adjusting the integral part of the PID controller. The
proposed approach is universal and can be used to stabilize the modes of operation of other
technical objects and technological processes
ΠΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ΅ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΡΠΎΠΏΠ»ΠΈΠ²ΠΎΠΌ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Ρ Π·Π°ΠΏΠ°Π·Π΄ΡΠ²Π°Π½ΠΈΠ΅ΠΌ
Π ΠΎΠ±ΠΎΡΠ° ΠΏΡΠΈΡΠ²ΡΡΠ΅Π½Π° ΠΏΡΠΎΠ±Π»Π΅ΠΌΡ ΡΠΈΠ½ΡΠ΅Π·Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ ΠΏΠ°Π»ΠΈΠ²ΠΎΠΌ Ρ ΡΠΈΡΡΠ΅ΠΌΡ Π· Π·Π°ΠΏΡΠ·Π½Π΅Π½Π½ΡΠΌ. ΠΠ°Π²Π΄Π°Π½Π½Ρ ΠΎΠ±ΠΌΠ΅ΠΆΠ΅Π½Π΅ ΠΏΠΎ Π»ΡΠ½ΡΠΉΠ½ΠΈΡ
ΡΠ½Π²Π°ΡΡΠ°Π½ΡΠ½ΠΈΡ
ΡΠΈΡΡΠ΅ΠΌ Π·Π°Π΄Π°Π½ΠΈΡ
ΡΠΏΡΠ°Π²Π»ΡΠ½Π½ΡΠΌ (ΠΠ-1, ΠΠ-2). Π‘ΠΈΠ½ΡΠ΅Π· ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»ΡΠ½Π½Ρ Π΄Π»Ρ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΡΠ²Π°Π»ΡΠ½ΠΎΡ ΡΠΈΡΡΠ΅ΠΌΠΈ Π²ΠΈΡΠ²Π»ΡΡΡΡΡΡ Π· Π²ΠΈΠΊΠΎΡΠΈΡΡΠ°Π½Π½ΡΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌ ΠΠΎΠ½ΡΡΡΠ³ΡΠ½Π°.The paper deals with the synthesis of the fuel-optimal control for the systems with delay in control loop. The considerations are confined to the class of the linear time-invariant systems performed by (II-1, II-2). Synthesis of the optimal control is achieved using the Pontryagin's maximum principle.Π Π°Π±ΠΎΡΠ° ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° ΠΏΡΠΎΠ±Π»Π΅ΠΌΠ΅ ΡΠΈΠ½ΡΠ΅Π·Π° ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΡΠΎΠΏΠ»ΠΈΠ²ΠΎΠΌ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Ρ Π·Π°ΠΏΠ°Π·Π΄ΡΠ²Π°Π½ΠΈΠ΅ΠΌ. ΠΠ°Π΄Π°ΡΠ° ΠΎΠ³ΡΠ°Π½ΠΈΡΠ΅Π½ΠΎ Π΄ΠΎ Π»ΠΈΠ½Π΅ΠΉΠ½ΡΡ
ΠΈΠ½Π²Π°ΡΠΈΠ°Π½ΡΠ½ΡΡ
ΡΠΈΡΡΠ΅ΠΌ Π·Π°Π΄Π°Π½Π½ΡΡ
ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ΠΌ (II-1, II-2). Π‘ΠΈΠ½ΡΠ΅Π· ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ Π΄Π»Ρ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΠΎΠΉ ΡΠΈΡΡΠ΅ΠΌΡ ΠΏΠΎΠ»ΡΡΠ°Π΅ΡΡΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΌΠ΅ΡΠΎΠ΄Π° ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌ ΠΠΎΠ½ΡΡΡΠ³ΠΈΠ½Π°
Search for double beta decay processes in 106Cd with the help of 106CdWO4 crystal scintillator
A search for the double beta processes in 106Cd was carried out at the Gran
Sasso National Laboratories of the INFN (Italy) with the help of a 106CdWO4
crystal scintillator (215 g) enriched in 106Cd up to 66%. After 6590 h of data
taking, new improved half-life limits on the double beta processes in 106Cd
were established at the level of 10^{19}-10^{21} yr; in particular,
T_{1/2}(2\nu \epsilon \beta^+) > 2.1 10^{20} yr, T_{1/2}(2\nu 2\beta^+) > 4.3
10^{20} yr, and T_{1/2}(0\nu 2\epsilon) > 1.0 10^{21} yr. The resonant
neutrinoless double electron captures to the 2718 keV, 2741 keV and 2748 keV
excited states of 106Pd are restricted to T_{1/2}(0\nu 2K) > 4.3 10^{20} yr,
T_{1/2}(0\nu KL1) > 9.5 10^{20} yr and T_{1/2}(0\nu KL3) > 4.3 10^{20} yr,
respectively (all limits at 90% C.L.). A possible resonant enhancement of the
0\nu 2\epsilon processes is estimated in the framework of the QRPA approach.
The radioactive contamination of the 106CdWO4 crystal scintillator is reported.Comment: Minor changes of half-life limits after improving the data analysis;
version accepted for publication on Phys. Rev.
Low background detector with enriched 116CdWO4 crystal scintillators to search for double beta decay of 116Cd
A cadmium tungstate crystal boule enriched in Cd to 82% with mass of
1868 g was grown by the low-thermal-gradient Czochralski technique. The
isotopic composition of cadmium and the trace contamination of the crystal were
estimated by High Resolution Inductively Coupled Plasma Mass-Spectrometry. The
crystal scintillators produced from the boule were subjected to
characterization that included measurements of transmittance and energy
resolution. A low background scintillation detector with two CdWO
crystal scintillators (586 g and 589 g) was developed. The detector was running
over 1727 h deep underground at the Gran Sasso National Laboratories of the
INFN (Italy), which allowed to estimate the radioactive contamination of the
enriched crystal scintillators. The radiopurity of a third CdWO
sample (326 g) was tested with the help of ultra-low background high purity
germanium detector. Monte Carlo simulations of double
processes in Cd were used to estimate the sensitivity of an experiment
to search for double decay of Cd.Comment: 24 pages, 13 figures, 3 tables, accepted for publication on Journal
of Instrumentatio
Searches for neutrinoless resonant double electron captures at LNGS
Several experiments were performed during last years at underground (3600 m
w.e.) Laboratori Nazionali del Gran Sasso (LNGS) of the INFN (Italy) to search
for resonant 2 captures in 96Ru, 106Cd, 136Ce, 156Dy, 158Dy,
180W, 184Os, 190Pt with the help of HP Ge semiconductor detectors, and ZnWO4
and 106CdWO4 crystal scintillators. No evidence for r-2 decays
was found, and only T_{1/2} limits were established in the range of
10^{14}-10^{21} yr.Comment: Proceedings of TAUP 2011 Conferenc