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Flexible diamond-like carbon film prepared by hydrothermal electrochemical method

Tao Y., Yi D., Zhu B., Cao W.

Materials Science Poland

2017

Vol. 35, No. 3

447--453

Diamond-like carbon (DLC) thin films were prepared by hydrothermal electrochemical method in one-step process. The structural characterization of these films was carried out by scanning electron microscopy (SEM), Raman spectroscopy, and infrared reflectance spectroscopy (IR). It was found that there was an increased sp2 carbon content but decreased sp3 carbon and hydrogen contents with an increase in current density. The flexibility and internal stresses of the DLC films were affected by hydrogen, sp3 amorphous carbon and ordered crystalline sp2 carbon contents. The highly flexible DLC films with high sp3 carbon and hydrogen contents were prepared at a current density of 0.001 mA/cm2.

Extended CPHD Filter for Combining Multi-Target Tracking with Sensor Alignment

Li D., Yi D.

Przegląd Elektrotechniczny

2013

R. 89, nr 1b

41--44

An extended CPHD (Cardinalised Probability Hypothesis Density) filter for combining multi-target tracking with sensor alignment is proposed. The augmented state is established by appending the sensor biases to the single-target state. The cardinality distribution of the targets and the intensity of the augmented state are propagated by employing Gaussian mixtures. The target states and the sensor biases are jointly estimated. Simulation results show that the proposed filter successfully achieves the sensor alignment and outperforms the standard CPHD filter.

Zaproponowano rozszerzony filtr CPHD do połączenia śledzenia wielu celów z wyrównaniem czujników. Wyrażenia dotyczące pojedynczego celu rozszerzono przez dodanie offsetu czujnika. Moc (kardynalność) rozkładu celów i intensywność rozszerzonego wyrażenia są zrealizowane przez zastosowanie przekształceń Gaussa. Przeprowadzono jednoczesna estymację wyrażeń celu i offsetu czujnika. Wyniki symulacji wykazują, że proponowane rozwiązanie satysfakcjonująco dokonuje wyrównania czujników i wyjściowych parametrów standardowego filtru CPHD.

Effect of reaction temperature on carbon films prepared by a hydrothermal electrochemical method

Tao Y., Yi D., Zhu B.

Materials Science Poland

2012

Vol. 30, No. 1

17--22

Carbon films were synthesized under hydrothermal electrochemical conditions using sugar as the carbon source at temperature ranging from 170 C to 180 C. The reaction temperature affects the degree of sugar decomposition, the concentration of carbon ions, supersaturation and overpotential of the solution, thereby affecting the morphology, orientation, and crystallinity of the films. The graphitic content (sp2) increases with increasing the processing temperature and vice versa. The higher the synthesizing temperature the less the amount of amorphous carbon (sp3). The graphite in thin films prepared at 170 C and 175 C shows a (101) preferred orientation, whereas those prepared at 180 C show a fairly random orientation. The mechanism of this synthesizing process seems to consist of three stages.