In the present article we analyze data from two temperature sensors of Mars Science Laboratory, which has been active in since August 2012. Temperature measurements received rover are noisy and must be processed validated before being delivered to scientific community. Currently, a simple Moving Average (MA) filter is used perform signal denoising. The application this basic method relies on as...

Some industrial activities in mines, such as underground coal mining, destress blasting for preventing rockburst, and ground can cause microseismic occurrence. The waveform contains abundant information on the hypocenter propagation path, which is valuable to study mechanism propagation. Therefore, this adopts multifractal detrended fluctuation analysis (MF-DFA) Hilbert–Huang transform (HHT) me...

A fault diagnosis system with the ability to recognize many different faults obviously has a certain complexity. Therefore, improving performance of similar systems attracted much research interest. This article proposes feature ranking and differential evolution for selection in BLDC diagnosis. First, this study used Hilbert–Huang transform (HHT) extract features four types brushless DC motor ...

Radio Frequency Interference (RFI) is an increasing problem particularly for Earth Observation using Microwave Radiometry. RFI has been observed, example, at L-band by the ESA’s SMOS (Soil Moisture and Ocean Salinity) Explorer NASA’s SMAP Active Passive) Aquarius missions, as well C-band AMSR-E AMRS-2; 10.7 GHz 18.7 AMSR-E, AMRS-2, WindSat GMI [1], [2]. Therefore, systems dedicate...

Titanium alloys have been used in aerospace, aeronautic, automotive, biomedical, structural, and other applications because titanium less density than materials like steel support higher stress Al-alloys. However, components made of are exposed to corrosive environments, the most common being industrial marine atmospheres. This research shows corrosion behavior three alloys, specifically Ti-CP2...

Time–frequency extraction is a key issue to understand structural symmetry of dynamic responses offshore oil platforms for early warning during drilling operations. Current popular methods signal characteristics can only obtain the attributes with single dimension or poor precision. To solve this, combined Hilbert–Huang transform (HHT) and variational mode decomposition (VMD) method proposed ex...

Vast segments of the frequency spectrum are reserved for primary (licensed ) users. These legacy users often under-utilize their reserved spectrum thus causing bandwidth waste. The unlicensed (secondary) users can take advantage of this fact and exploit the spectral holes (vacant spectrum segments). Since spectrum occupancy is transient in nature it is imperative that the spectral holes are ide...