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This paper describes the design, fabrication, and testing of an on-wafer substrate that has been developed specifically for measuring extreme impedance devices using an on-wafer probe station. Such devices include carbon nano-tubes (CNTs) and structures based on graphene which possess impedances in the κ Ω range and are generally realised on the nano-scale rather than the micro-scale that is used...
In addition to being able to provide accurate location information, indoor positioning services/systems (IPS) for large public buildings/facilities should be easy to deploy and maintain, stay scalable in response to surges in crowd density and location queries, minimize the capabilities required of user devices to use the service and degrade gracefully to be disaster resilient. This paper describes...
Power transformer assumes the important role in transportation of power energy; however, the initial faults inside transformer would eventually develop into catastrophic failure during its operation, which could result in the outage of equipment. Winding deformation and movement are considered to be the most common faults inside transformer. This paper proposed an online detection method for power...
Low cost wafer-level chip-scale vacuum packaging (WLCSVP) imposes unique constraints on potential implementation of through-silicon vias (TSVs). A WLCSVP requires a relatively thick substrate to prevent mechanical failure. Two approaches for integrating TSVs in thick silicon wafers have been successfully demonstrated. Both approaches enable TSV formation from the backside of a device wafer and are...
Surface creeping discharge at solid-liquid interface is regarded as one of the reasons for oil-immersed transformers failure. In order to restrain the surface creeping discharge, we investigated the effects of TiO2 nanoparticles on creeping discharge and flashover characteristics of the oil/pressboard interface under AC and impulse voltages. Partial discharge and creeping flashover tests of oil/pressboard...
Based on the special structure of exciting coils system of joule balance, the uncertainty sources of the magnetic density in the geometrical center of magnetic field was analyzed and evaluated. The relative combined standard uncertainty of magnetic field in ΔH/H was 4.9 × 10−4. In addition, it was proved that the largest component of uncertainty was u(I), which was 2.8×10−4. Therefore the high-precision...
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