class PhysicalEvent[+I, S](component: PhysicalObject[I], timepoint: TimePoint[Long], state: PhysicalState[S]) extends INSTATE[PhysicalObject[I], Long, PhysicalState[S]] (component, timepoint, state) with BeSpaceDGestalt.core.Event[S] abstract class DeviceEvent[+I, S](device: Device[I], timepoint: TimePoint[Long], state: DeviceState[S]) extends PhysicalEvent[I, S](device, timepoint, state)class ...

A set of sensor nodes is the basic component of a sensor network. Many researchers are currently engaged in developing pervasive sensor nodes due to the great promise and potential with applications shown by various wireless remote sensor networks. This short paper describes the concept of sensor node architecture and current research activities on sensor node development at ICTCAS. 1 The Conce...

In this paper, a novel approach to multi-hop range-free localization algorithm in wireless sensor network is proposed using principal component regression. The localization problem in the wireless sensor network is formulated as a multiple regression problem, which is resolved by principal component regression. The proposed methods are simple and efficient that no additional hardware is require...

A multiscale principal component analysis method is proposed for sensor fault detection and identification. After decomposition of sensor signal by wavelet transform, the coarse-scale coefficients from the sensors with strong correlation are employed to establish the principal component analysis model. A moving window is designed to monitor data from each sensor using the model. For the purpose...

Localization of sensor nodes is essential component in many ad-hoc sensor network applications. This paper presents an overview to existing localization techniques.

adequate coverage is one of the main problems for distributed wireless sensor networks and the effectiveness of that highly depends on the sensor deployment scheme. given a finite number of sensors, optimizing the sensor deployment will provide sufficient sensor coverage and save power of sensors for movement to target location to adequate coverage. in this paper, we apply fuzzy logic system to...

Wireless sensor network contain hundreds of sensor nodes. These sensor nodes uses radio signal using communication. A wireless sensor node is well found with radio transceiver, sensor device and power component. A wireless sensor network is made up of sensor, embedded techniques, distributed information mechanism. Wireless sensor network is much versatile as compared to traditional wireless net...

Pulsed eddy current (PEC) technique provides a means to inspect structures without surface contact. It is particularly useful when the structure's rough or inaccessible, such as insulated pipes in pipeline. Probe parameters of PEC system, especially sensing and excitation coil diameters, can significantly affect system's performance. Thus, detailed analysis these paramount developing system. Cu...