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Recently, waveform inversion is one of the most popular methods because it can provide sub-wavelength images. In the inversion of field data, the source wavelet must be estimated. Traditionally, the source wavelet is added in the inversion as a new unknown parameter and updated with iterations. When the results of the inversion are the same as the true models, the estimated source wavelet is same...
The transient stability is an important factor to estimate the maximum transmission power of turbine generator and guarantee the safety and stable operation of power system [1]. It is the ability of power system to maintain synchronism in the first oscillation period after three-phase short circuit. A first swing stable system is considered stable if the system has adequate damping [2]. The rotor...
Polymeric insulating material is widely used for insulation in electric devices with its excellent insulating properties except a weakness of thermal conductivity. Tracking failure associated with the thermal conductivity is a typical dielectric breakdown performance on polymer surface. One possibility to change the resistance to tracking is the use of an inorganic filling material with high thermal...
Al:ZnO (AZO) thin films were deposited on quartz substrates by RF magnetron sputtering. The influences of thickness and substrate temperature on the structural, electrical, and optical properties of AZO films were investigated. Atomic force microscopy (AFM), transmission electron microscopy (TEM) and Hall Effect results revealed that a growth mode transition exists at the thickness of about 140 nm...
Molybdenum thin films were RF sputtered on soda lime glasses as back contacts for Cu2ZnSnS4 solar cells. In this work, the pressure and substrate temperature effect on structural, electrical, adhesion and surface morphology are investigated. About 500 nm thick thin films deposited at low argon pressure and high substrate temperature exhibit low resistivity of 11.4 µΩ cm. Films deposited at high argon...
Studying thin film thermal conduction is important in the development of many heat related sensors, actuators and microsystems. Emerging non-contact metrologies of membrane thermal conductivity show several advantages when devices are scaling down or novel materials are utilized. In this paper, a method to evaluate membrane thermal conductivity is presented using quantum dots as temperature markers...
We studied the temperature dependence of the specific contact resistance of the copper/GaMnAs interface in the range from 15 K to 290 K. This range includes the Curie temperature of the GaMnAs film of about 145 K. is typically as low as cm, and decreases slowly with decreasing temperature . However, as approaches Curie temperature ...
The paper have demonstrated the effect of the resistivity reduction of the atomic layer deposited (ALD) TiN film using TDMAT precursor by modifying the NH3 process (both initial exposure and post deposition annealing (PDA) processes). It was found that the resistivity of the ALD TiN was significantly reduced by extending NH3 exposure time and increasing PDA temperature by 700°C. Moreover, by employing...
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