We present a combination of measurements of the top quark mass by the D0 experiment in the lepton+jets and dilepton channels. We use all the data collected in Run I (1992–1996) at √s=1.8 TeV and Run ...II (2001–2011) at √s = 1.96 TeV of the Tevatron $p\bar{p}$ collider, corresponding to integrated luminosities of 0.1 fb$^{−1}$ and 9.7 fb$^{−1}$, respectively. The combined result is: $m_t$ = 174.95±0.40(stat)±0.64(syst) GeV = 174.95±0.75 GeV.
We present the first measurement of the CP violating charge asymmetry in $B^{±} → μ^{±} ν_{μ}D^0$ decays using the full Run II integrated luminosity of 10.4 fb$^{-1}$ in proton-antiproton collisions ...collected with the D0 detector at the Fermilab Tevatron Collider. We measure a difference in the yield of $B^-$ and $B^+$ mesons in these decays by fitting the reconstructed invariant mass distributions. This results in an asymmetry of $A^{μ}$ $^{D}$ $^{0}$ = -0.14±0.20%, which is consistent with standard model predictions.
It is shown that learning control can be used to produce control signals for perfect tracking for a class of nonlinear systems defined by the Cartwright-Littlewood equation. The idea is to utilize ...the qualitative information of the nonlinear systems so that convergence in the functional space can be achieved. The design is not based on precise information about the quantitative parameters of the plant. The result is illustrated by the example of the Van der Pol equation.< >
The effect of molybdate ions on the corrosion of Fe in neutral solutions was investigated by electrochemical measurements (dc polarisation and impedance spectroscopy) together with gravimetric ...determinations. Studies were conducted in solutions containing sodium hydrogen/sodium sulphate salts with molybdate concentrations ranging between 10
−4
and 10
−2
M at pH 8 and 9. Mass loss measurements indicated that about 10
−3
M of molybdate was necessary in order to inhibit completely the corrosion of Fe at room temperature. The potentiodynamic polarisation and electrochemical impedance studies gave indications about the mechanism of action of the MoO
2−
4
ion. They also showed that the inhibiting effect of the oxyanion is increased in the presence of dissolved oxygen. Spontaneous passivation of the corroding Fe electrode could happen only in the presence of dissolved oxygen at concentrations greater than 10
−4
M. However, passivity was also obtained under potentiodynamic polarisation conditions in deaerated solutions. The effect of the oxygen was attributed to displacement of the corrosion potential into the region of selfpassivation of the steel. Finally, the results indicated that the corrosion inhibition of Fe in neutral solutions by molybdate ions was largely insensitive to pH over the range from 8 to 9.
The problem of control design for systems to perform repetitive tracking is considered. The control structure combines open-loop control and closed-loop control. The specific organization is designed ...on the philosophy that open-loop control should be used to take full advantage of a priori knowledge and feedback control should be used for regulation against modeling uncertainties and disturbances. With this control structure learning takes place in the open-loop controller. In each iteration the share of the open-loop control in the total control input increases, while that of the closed-loop control decreases. Convergence theorems are established as design guidelines for learning algorithms. Numerical examples are given.< >
In this paper, we address the problem of detecting process changes by monitoring spatially distributed data in semiconductor manufacturing processes. A specific question treated in this paper is how ...to extract information from the spatial data for change detection when we do not know what information contained in the data is useful. We adopt the idea investigated by Zamel and Hinton of using neural networks to extract information which is not known a priori. The result shows that this approach works much better than the simple mean for process changes detection.
