PROBLEM TO BE SOLVED: To provide a device for measuring a natural frequency of a building using a portable information terminal, capable of inexpensively measuring a natural frequency of a building using a widely available device.SAITO SUMIHITO...
A universal calculation method for simple predetermination of natural radiation on building surfaces and solar collectorsBinocular disparityinvariant object recognitionspatial-frequency analysisoptical flowWigner distributionThis article is concerned with the need for an instructive and simple but universal and ...
is proposed to determine the natural frequencies and mode shapes of trussed-tube systems in tall buildings. Braces are modelled as transverse springs at specific locations along with the height of the structure. Framed-tube system is idealized as a cantilever beam, representing actual characteristics ...
I'm designing a bridge, and need to check that the natural frequency of my structure is greater than 5 Hz. I have made 12 numbers of modes, and am getting frequencies at different modes, but have no idea how to interpret this. Do I just use the frequency at a mode where the modal...
Strength dependency of frequency–magnitude distribution in earthquakes and implications for stress state criticality Theb-value in earthquake size distribution shows spatiotemporal variations, being key to consider large-earthquake genesis. By high-precision focal mechanism data, we show a physical reason ...
Doppler radarDoppler radars, such as this one operated by the U.S. National Weather Service at New Underwood, South Dakota, extract the Doppler frequency shift of the echo produced by a moving target by noting how much the frequency of the received signal differs from the frequency of the si...
and normalized differentialvegetation indexas factorsaffecting the occurrence of landslides were identified. In order to weigh the classes of each of the factors, a frequency ratio method was used and the normalized weights were transferred to the R software environment. For the evaluation of the mod...
When a building's natural frequency is the same as earthquake motion this causes the building to vibrate more, a process known as Resonance In a P-wave the particles of the medium move in what manner relative to the direction of wave propagation? Parallel to it Earthquake directivity refers ...
However, the lower revisit frequency of these sensors makes a lower temporal resolution, thereby limiting intensive temporal monitoring of natural hazards (Huang et al. 2018). In the seismic data acquisition process of reflection seismology, the spatial resolution often depends on the device’s ...
An investigation of the frequency of large disasters (mega-disasters) by country shows us that, for the last three decades, there was one country where such events occurred almost every year (China), three countries with a return period of less than three years (USA, India and Japan), and...