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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Geometric Singular Perturbation Theory and Traveling Pulses with Monotone Tails in a Diffusive Rosenzweig MacArthur Model
扩散 罗森茨威格麦克阿瑟模型 几何奇异摄动理论 单调尾巴行进脉冲
2023/5/5
In this talk, we first briefly review history of the geometric singular perturbation theory, then talk about the traveling pulses for a diffusive Rosenzweig MacArthur model. We show the existence of t...
Cornell engineers used precisely timed laser pulses to control changeable properties in a quantum material, pioneering a method that may have wide applications across a class of materials with immense...
Comparison of methods of determining meteoroid range rates from linear frequency modulated chirped pulses
determining meteoroid modulated chirped pulses
2017/3/22
In this paper we present three methods for evaluating range rates of meteoroids
passing through the ionosphere, using linear frequency modulated (LFM) chirped pulse
data from the ALTAIR radar. The f...
Nocturnal Light Pulses Lower Carbon Dioxide Production Rate without Affecting Feed Intake in Geese
Feed Intake Goose Intermittent Lighting Metabolic Rate Photoperiod
2016/5/19
This study was conducted to investigate the effect of nocturnal light pulses (NLPs) on the feed intake and metabolic rate in geese. Fourteen adult Chinese geese were penned individually, and randomly ...
Spatial-temporal structure of seismicity of the North Tien Shan and its changeunder effect of high energy electromagnetic pulses
earthquake initiated seismicity electromagnetic pulse
2015/9/14
The effect of high-energy electromagnetic pulses emitted by a magnetohydrodynamic generator used as a source for deep electrical sounding of the crust on spatial-temporal structure of seismicity of th...
WAVEFORM PROCESSING OF LASER PULSES FOR RECONSTRUCTION OF SURFACES IN URBAN AREAS
Urban Analysis Laser scanning LIDAR Measurement Feature
2015/8/3
In this paper we describe investigations for digital recording of received laser pulses and a detailed analysis of the pulse waveform.In contrast to previous works using a single photon detection tech...
EXTRACTION OF FEATURES FROM OBJECTS IN URBAN AREAS USING SPACETIME ANALYSIS OF RECORDED LASER PULSES
Urban Analysis Simulation Laser scanning LIDAR Measurement Feature
2015/6/1
In this paper we describe a simulation system and investigations for analysis of recorded laser pulses. A simulation setup that considers simulated signals of synthetic objects was developed for explo...
Formation of a laccolith by magma pulses: Evidence from modal and chemical composition of the 500 m long borehole section through the Permo-Carboniferous Landsberg laccolith (Halle Volcanic Complex)
laccolith formation magma pulses rhyolite Halle Volcanic Complex
2017/4/10
The 500 m long section through the upper part of the Permo-Carboniferous Landsberg laccolith (Halle Volcanic Complex)
was sampled every 25 meters. The modal proportions between plagioclase and K-feld...
Vast ranges of volcanoes hidden under the oceans are presumed by scientists to be the gentle giants of the planet, oozing lava at slow, steady rates along mid-ocean ridges. But a new study shows that ...
Short-lived tectonic switch mechanism for long-term pulses of volcanic activity after mega-thrust earthquakes
Short-lived tectonic switch mechanism long-term pulses volcanic activity mega-thrust earthquakes
2015/1/6
Eruptive rates in volcanic arcs increase significantly after subduction mega-thrust earthquakes. Over short to intermediate time periods the link between mega-thrust earthquakes and arc response can b...
Characterization and Interactions of Ultrafast Surface Plasmon Pulses
Femtosecond pulse tracking Heterodyne detection Near-field scanning optical microscope Plasmonic nanostructures Spectral bandwidth Ultrafast Surface Plasmon
2014/11/20
Surface Plasmon Polaritons (SPPs) are considered to be attractive components for plasmonics and nanophotonic devices due to their sensitivity to interface changes, and their ability to guide and confi...
New study shows three abrupt pulses of CO2 during last deglaciation（图）
last deglaciation study
2014/12/1
CORVALLIS, Ore. – A new study shows that the rise of atmospheric carbon dioxide that contributed to the end of the last ice age more than 10,000 years ago did not occur gradually, but was characterize...
Light pulses control graphene’s electrical behavior（图）
graphene’s electrical behavior The sensor
2014/8/19
Graphene, an ultrathin form of carbon with exceptional electrical, optical, and mechanical properties, has become a focus of research on a variety of potential uses. Now researchers at MIT have found ...
Bright pulses of light could make space veggies more nutritious, says CU-Boulder study（图）
light nutritious Bright pulses
2014/3/20
Exposing leafy vegetables grown during spaceflight to a few bright pulses of light daily could increase the amount of eye-protecting nutrients produced by the plants, according to a new study by resea...
BACKSCATTERING OF INDIVIDUAL LIDAR PULSES FROM FOREST CANOPIES EXPLAINED BY PHOTOGRAMMETRICALLY DERIVED VEGETATION STRUCTURE
Canopy imaging silhouette footprint echo triggering waveform LiDAR
2014/4/24
In recent years, airborne LiDAR sensors have shown remarkable performance in the mapping of forest vegetation. This experimental study looks at LiDAR data at the scale of individual pulses to elucidat...