1,522 research outputs found
Optimization of Photoelastic Properties and Stress Relief of Small-Sized Polycarbonate Disks for Granular Material Photoelastic Tests
The development of photoelastic tests was strongly enhanced by appearance of polycarbonate, hich turned out to be an excellent photoelastic material. In order to obtain small polycarbonate particles applicable for granular material photoelastic tests, small-diameter transparent cylindrical disks are cut from a polycarbonate plate preliminarily subjected to annealing, in order to provide stress relief. The plate-cutting and annealing regimes are optimized by the comprehensive analysis of mechanical and photoelastic properties of polycarbonate disks of various diameters and constant height of 5 mm. The resulting stress-strain photoelastic visualizations and material fringe patterns are analyzed, in order to verify the effectiveness of the proposed material processing and annealing regimes.ΠΠΎΠ»ΠΈΠΊΠ°ΡΠ±ΠΎΠ½Π°Ρ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠΌ ΡΠΎΡΠΎΡΠΏΡΡΠ³ΠΈΠΌ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠΌ Π΄Π»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΠΉ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠΎΡΠΎΡΠΏΡΡΠ³ΠΎΡΡΠΈ. ΠΠ»Ρ ΠΏΠΎΠ»ΡΡΠ΅Π½ΠΈΡ Π½Π΅Π±ΠΎΠ»ΡΡΠΈΡ
ΡΠ°ΡΡΠΈΡ ΠΏΠΎΠ»ΠΈΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ°, ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΠΌΡΡ
ΠΏΡΠΈ ΡΠΎΡΠΎΡΠΏΡΡΠ³ΠΈΡ
ΠΈΡΠΏΡΡΠ°Π½ΠΈΡΡ
Π³ΡΠ°Π½ΡΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°, ΠΈΠ· ΠΏΠΎΠ»ΠΈΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ½ΠΎΠΉ ΠΏΠ»Π°ΡΡΠΈΠ½Ρ, ΠΏΡΠ΅Π΄Π²Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ ΠΏΠΎΠ΄Π²Π΅ΡΠ³Π½ΡΡΠΎΠΉ ΠΎΡΠΆΠΈΠ³Ρ Π΄Π»Ρ ΡΠ΅Π»Π°ΠΊΡΠ°ΡΠΈΠΈ ΠΎΡΡΠ°ΡΠΎΡΠ½ΡΡ
Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΠΉ, Π²ΡΡΠ΅Π·Π°ΡΡΡΡ ΠΏΡΠΎΠ·ΡΠ°ΡΠ½ΡΠ΅ ΡΠΈΠ»ΠΈΠ½Π΄ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π΄ΠΈΡΠΊΠΈ ΠΌΠ°Π»ΠΎΠ³ΠΎ Π΄ΠΈΠ°ΠΌΠ΅ΡΡΠ°. Π Π΅ΠΆΠΈΠΌΡ ΡΠ΅Π·ΠΊΠΈ ΠΈ ΠΎΡΠΆΠΈΠ³Π° ΠΎΠΏΡΠΈΠΌΠΈΠ·ΠΈΡΠΎΠ²Π°Π½Ρ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ Π°Π½Π°Π»ΠΈΠ·Π° ΠΌΠ΅Ρ
Π°Π½ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΡΠΎΡΠΎΡΠΏΡΡΠ³ΠΈΡ
ΡΠ²ΠΎΠΉΡΡΠ² ΠΏΠΎΠ»ΠΈΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ½ΡΡ
Π΄ΠΈΡΠΊΠΎΠ² ΡΠ°Π·Π½ΠΎΠ³ΠΎ Π΄ΠΈΠ°ΠΌΠ΅ΡΡΠ° ΠΈ ΠΏΠΎΡΡΠΎΡΠ½Π½ΠΎΠΉ Π²ΡΡΠΎΡΡ (5 ΠΌΠΌ). ΠΠ½Π°Π»ΠΈΠ· ΡΠΎΡΠΎΡΠΏΡΡΠ³ΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π½Π°ΠΏΡΡΠΆΠ΅Π½Π½ΠΎ-Π΄Π΅ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ Π΄ΠΈΡΠΊΠΎΠ² ΠΈ ΠΈΠ·ΠΎΡ
ΡΠΎΠΌ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠ΄ΠΈΠ» Π²ΡΡΠΎΠΊΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ ΠΏΡΠ΅Π΄Π»Π°Π³Π°Π΅ΠΌΡΡ
ΡΠ΅ΠΆΠΈΠΌΠΎΠ² ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΈ ΠΎΡΠΆΠΈΠ³Π° Π΄Π»Ρ Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π°.ΠΠΎΠ»ΡΠΊΠ°ΡΠ±ΠΎΠ½Π°Ρ Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΈΠΌ ΡΠΎΡΠΎΠΏΡΡΠΆΠ½ΠΈΠΌ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»ΠΎΠΌ Π΄Π»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π½Ρ ΠΌΠ΅Ρ
Π°Π½ΡΡΠ½ΠΈΡ
Π²ΠΈΠΏΡΠΎΠ±ΡΠ²Π°Π½Ρ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ ΡΠΎΡΠΎΠΏΡΡΠΆΠ½ΠΎΡΡΡ. ΠΠ»Ρ ΠΎΡΡΠΈΠΌΠ°Π½Π½Ρ Π½Π΅Π²Π΅Π»ΠΈΠΊΠΈΡ
ΡΠ°ΡΡΠΈΠ½ΠΎΠΊ ΠΏΠΎΠ»ΡΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΡ, ΡΠΎ Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΡΡΡΡΡ ΠΏΡΠΈ ΡΠΎΡΠΎΠΏΡΡΠΆΠ½ΠΈΡ
Π²ΠΈΠΏΡΠΎΠ±ΡΠ²Π°Π½Π½ΡΡ
Π³ΡΠ°Π½ΡΠ»ΡΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅Ρ ΡΠ°Π»Ρ, Π· ΠΏΠΎΠ»ΡΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ½ΠΎΡ ΠΏΠ»Π°ΡΡΠΈΠ½ΠΈ, ΡΠΊΡ ΠΏΠΎΠΏΠ΅ΡΠ΅Π΄Π½ΡΡ ΠΏΡΠ΄Π΄Π°Π²Π°Π»ΠΈ Π²ΡΠ΄ΠΏΠ°Π»Ρ Π΄Π»Ρ ΡΠ΅Π»Π°ΠΊΡΠ°ΡΡΡ Π·Π°Π»ΠΈΡΠΊΠΎΠ²ΠΈΡ
Π½Π°ΠΏΡΡΠΆΠ΅Π½Ρ, Π²ΠΈΡΡΠ·Π°Π»ΠΈ ΠΏΡΠΎΠ·ΠΎΡΡ ΡΠΈΠ»ΡΠ½Π΄ΡΠΈΡΠ½Ρ Π΄ΠΈΡΠΊΠΈ ΠΌΠ°Π»ΠΎΠ³ΠΎ Π΄ΡΠ°ΠΌΠ΅ΡΡΠ°. Π Π΅ΠΆΠΈΠΌΠΈ ΡΡΠ·Π°Π½Π½Ρ Ρ Π²ΡΠ΄ΠΏΠ°Π»Ρ ΠΎΠΏΡΠΈΠΌΡΠ·ΠΎΠ²Π°Π½ΠΎ Π² ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ Π°Π½Π°Π»ΡΠ·Ρ ΠΌΠ΅Ρ
Π°Π½ΡΡΠ½ΠΈΡ
Ρ ΡΠΎΡΠΎΠΏΡΡΠΆΠ½ΠΈΡ
Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΠ΅ΠΉ ΠΏΠΎΠ»ΡΠΊΠ°ΡΠ±ΠΎΠ½Π°ΡΠ½ΠΈΡ
Π΄ΠΈΡΠΊΡΠ² ΡΡΠ·Π½ΠΎΠ³ΠΎ Π΄ΡΠ°ΠΌΠ΅ΡΡΠ° Ρ ΠΏΠΎΡΡΡΠΉΠ½ΠΎΡ Π²ΠΈΡΠΎΡΠΈ (5 ΠΌΠΌ). ΠΠ½Π°Π»ΡΠ· ΡΠΎΡΠΎΠΏΡΡΠΆΠ½ΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΎ-Π΄Π΅ΡΠΎΡΠΌΠΎΠ²Π°Π½ΠΎΠ³ΠΎ ΡΡΠ°Π½Ρ Π΄ΠΈΡΠΊΡΠ² Ρ ΡΠ·ΠΎΡ
ΡΠΎΠΌ ΠΏΡΠ΄ΡΠ²Π΅ΡΠ΄ΠΈΠ² Π²ΠΈΡΠΎΠΊΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΡΡΡΡ Π·Π°ΠΏΡΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΡΠ² ΠΎΠ±ΡΠΎΠ±ΠΊΠΈ Ρ Π²ΡΠ΄ΠΏΠ°Π»Ρ Π΄Π»Ρ Π΄Π°Π½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»Ρ
Pair production of charged Higgs bosons in the Left-Right Twin Higgs model at the ILC and LHC
Left-Right twin Higgs(LRTH) model predicts the existence of a pair of charged
Higgs . In this paper, we study the production of the charged Higgs
bosons pair via the process at
the International Linear Collider(ILC). The numerical results show that the
production rates are at the level of several tens fb, this process can produce
the adequate distinct multi-jet final states and the SM background can be
efficiently reduced. We also discuss the charged Higgs boson pair production
via the process at the Large Hadron
Collider(LHC) and estimate there production rates. We find that, as long as the
charged Higgs bosons are not too heavy, they can be abundantly produced at the
LHC. The possible signatures of these new particles might be detected at the
ILC and LHC experiments.Comment: 15 pages, 5 figures, discussion extended, reference added, typos
fixed, revised version to be published in Eur.Phys.J.
Facile electrodeposition of high-density CuCo2O4 nanosheets as a high-performance Li-ion battery anode material
High-density CuCo2O4 nanosheets are grown on Ni foam using electrodeposition followed by air annealing for a Li-ion battery anode. The anode exhibits a high discharge capacity of 1244 mAh/g at 0.1 A/g (82% coulombic efficiency) and excellent high-rate performance with 95% capacity retention (1100 mAh/g after 200 cycles at 1 A/g). The outstanding battery performance of the CuCo2O4 anode is attributed to its binder-free direct contact to the current collector and high-density nanosheet morphology. The present experimental findings demonstrate that the electrodeposited binder-free CuCo2O4 material may serve as a safe, low-cost, long-cycle life anode for Li-ion batteries
Non-Markovian dynamics for an open two-level system without rotating wave approximation: Indivisibility versus backflow of information
By use of the two measures presented recently, the indivisibility and the
backflow of information, we study the non-Markovianity of the dynamics for a
two-level system interacting with a zero-temperature structured environment
without using rotating wave approximation (RWA). In the limit of weak coupling
between the system and the reservoir, and by expanding the time-convolutionless
(TCL) generator to the forth order with respect to the coupling strength, the
time-local non-Markovian master equation for the reduced state of the system is
derived. Under the secular approximation, the exact analytic solution is
obtained and the sufficient and necessary conditions for the indivisibility and
the backflow of information for the system dynamics are presented. In the more
general case, we investigate numerically the properties of the two measures for
the case of Lorentzian reservoir. Our results show the importance of the
counter-rotating terms to the short-time-scale non-Markovian behavior of the
system dynamics, further expose the relations between the two measures and
their rationality as non-Markovian measures. Finally, the complete positivity
of the dynamics of the considered system is discussed
Degradation and healing in a generalized neo-Hookean solid due to infusion of a fluid
The mechanical response and load bearing capacity of high performance polymer
composites changes due to diffusion of a fluid, temperature, oxidation or the
extent of the deformation. Hence, there is a need to study the response of
bodies under such degradation mechanisms. In this paper, we study the effect of
degradation and healing due to the diffusion of a fluid on the response of a
solid which prior to the diffusion can be described by the generalized
neo-Hookean model. We show that a generalized neo-Hookean solid - which behaves
like an elastic body (i.e., it does not produce entropy) within a purely
mechanical context - creeps and stress relaxes when infused with a fluid and
behaves like a body whose material properties are time dependent. We
specifically investigate the torsion of a generalized neo-Hookean circular
cylindrical annulus infused with a fluid. The equations of equilibrium for a
generalized neo-Hookean solid are solved together with the convection-diffusion
equation for the fluid concentration. Different boundary conditions for the
fluid concentration are also considered. We also solve the problem for the case
when the diffusivity of the fluid depends on the deformation of the generalized
neo-Hookean solid.Comment: 24 pages, 10 figures, submitted to Mechanics of Time-dependent
Material
Measurements of the observed cross sections for exclusive light hadrons containing at , 3.650 and 3.6648 GeV
By analyzing the data sets of 17.3, 6.5 and 1.0 pb taken,
respectively, at , 3.650 and 3.6648 GeV with the BES-II
detector at the BEPC collider, we measure the observed cross sections for
, , ,
and at the three energy
points. Based on these cross sections we set the upper limits on the observed
cross sections and the branching fractions for decay into these
final states at 90% C.L..Comment: 7 pages, 2 figure
Partial wave analysis of J/\psi \to \gamma \phi \phi
Using events collected in the BESII detector, the
radiative decay is
studied. The invariant mass distribution exhibits a near-threshold
enhancement that peaks around 2.24 GeV/.
A partial wave analysis shows that the structure is dominated by a
state () with a mass of
GeV/ and a width of GeV/. The
product branching fraction is: .Comment: 11 pages, 4 figures. corrected proof for journa
Direct Measurements of Absolute Branching Fractions for D0 and D+ Inclusive Semimuonic Decays
By analyzing about 33 data sample collected at and around 3.773
GeV with the BES-II detector at the BEPC collider, we directly measure the
branching fractions for the neutral and charged inclusive semimuonic decays
to be and , and determine the ratio of the two branching
fractions to be
Measurements of the observed cross sections for exclusive light hadron production in e^+e^- annihilation at \sqrt{s}= 3.773 and 3.650 GeV
By analyzing the data sets of 17.3 pb taken at GeV
and 6.5 pb taken at GeV with the BESII detector at the
BEPC collider, we have measured the observed cross sections for 12 exclusive
light hadron final states produced in annihilation at the two energy
points. We have also set the upper limits on the observed cross sections and
the branching fractions for decay to these final states at 90%
C.L.Comment: 8 pages, 5 figur
Measurements of psi(2S) decays to octet baryon-antibaryon pairs
With a sample of 14 million psi(2S) events collected by the BESII detector at
the Beijing Electron Positron Collider (BEPC), the decay channels psi(2S)->p
p-bar, Lambda Lambda-bar, Sigma0 Sigma0-bar, Xi Xi-bar are measured, and their
branching ratios are determined to be (3.36+-0.09+-0.24)*10E-4,
(3.39+-0.20+-0.32)*10E-4, (2.35+-0.36+-0.32)*10E-4, (3.03+-0.40+-0.32)*10E-4,
respectively. In the decay psi(2S)->p p-bar, the angular distribution parameter
alpha is determined to be 0.82+-0.17+-0.04.Comment: 8 pages, 8 figure
- β¦