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Gyrowheel is a unique attitude control device to measure external rates of the spacecraft body as well as provide momentum control. To ensure the external rate sensing accuracy of Gyrowheel, study of the accurate characterization of the currents in the torque coils is performed in this paper. Components of the current signals and the sources of them are analyzed, and an effective filtering method...
Wireless Body Area Network(WBAN) has made progress in technology and is gaining momentum in healthcare field. As the number of WBAN increases, WBANs coexistence is becoming prevalent which brings a negative effect on communication quality. In healthcare field, data reliability and power efficiency are attracting more attention. Many power control mechanisms based on TDMA have been provided to improve...
This paper proposes a novel approach of two-dimensional micro-spacecraft angular rate sensing with the Gyrowheel(GW), in which case, the three-dimensional control torques can be produced by the GW as an actuator at the same time. The objective of the paper is to address the problems of the spacecraft angular rate sensing as the rotor of GW works at large tilt angles. For this purpose, firstly, the...
A unique AlIII‐based metal–organic framework (467‐MOF) with two types of square channels has been designed and synthesized by using a flexible tricarboxylate ligand under solvothermal conditions. 467‐MOF exhibits superior thermal and chemical stability and, moreover, shows high CO2 sorption selectivity over H2, with a selectivity, based on the ideal adsorbed solution theory (IAST) of approximately...
With the rapid development of the mobile computing and wireless network technology, the mobile telehealth system has been used more and more widely. An important issue of the telehealth system is that too many network traffics are generated while transferring data from the sensors to servers. To solve this problem, we propose a differential algorithm for reducing the network traffics of the telehealth...
By exploiting the sparsity of the channel impulse response (CIR), compressive channel sensing methods are capable of recovering the channel state information with overwhelming probability, given that the sensing matrix holds the restricted isometry property (RIP). To this end, random pilot patterns are often assumed to ensure the RIP of the sensing matrix. In practical orthogonal frequency division...
In our previous work, a node self-localization algorithm based on virtual central node (VCN) for wireless sensor network (WSN) is proposed. This method is adapted to WSN that anchor nodes present a uniform distribution in three dimensional spaces. During the localization process, by deducing a 3D special node, which is called virtual central node, unknown nodes can compute their own positions automatically...
The grating eddy current displacement sensor (GECDS) for displacement or position measurement used in watertight electronic digital caliper was described. The parameters optimization of the sensor is essential for economic and efficient production. The purpose of this study is to determine the optimal combination of the sensor parameters and analyze the effects of these parameters on the nonlinearity...
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