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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The distribution on periods of the continued fraction of $\sqrt{d}$
$sqrt{d}$ 连续分数 周期
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2023/4/18
The continued fraction is a very old and classical object. Its period is closely related to the solubility of the Pell equations, and also to the class group of quadratic fields. Last year, Koymans an...
The fraction of the global population at risk of floods is growing
flood climatic disaster global population economic development
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2021/8/9
Satellite imaging combined with population data shows that, globally, the number of people living in flood-prone areas is growing faster than is the number living on higher ground — greatly increasing...
Researchers show that protein from microbes uses a fraction of the resources of conventional farming
solar-powered microbes protein ecosystem
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2021/8/5
An international research team has shown that using solar-panels to produce microbial protein -- which is rich not just in proteins but also in other nutrients -- is more sustainable, efficient and en...
EVALUATION OF FOREST CANOPY AND UNDERSTORY GAP FRACTION DERIVED FROM TERRESTRIAL LASER SCANNING
Forest structure Understory Gap fraction Terrestrial laser scanner
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2016/11/30
The quantification of forest carbon sequestration is helpful to understand the carbon storage on the Earth. The estimation of forest carbon sequestration can be achieved by the use of leaf area index ...
REMOTE SENSING IMAGE-BASED ANALYSIS OF THE RELATIONSHIP BETWEEN URBAN HEAT ISLAND AND VEGETATION FRACTION
Urban heat island vegetation fraction the relationship
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2016/1/3
As the relationship between land surface temperature (LST) and Normalized Difference Vegetation Index (NDVI) can not be able to effectively apply after NDVI reached saturation[1]. In this study, the v...
A STUDY ON FAST ESTIMATION OF VEGETATION FRACTION IN THREE GORGES EMIGRATION AREA BY USING SPOT5 IMAGERY
Remote Sensing Vegetation Estimation SPOT Imagery Mosaic Pixel
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2015/12/28
Vegetation Fraction is a comprehensive quantitative index in forest management and vegetation community cover conditions, and it’s also an important parameter in many remote sensing ecological models,...
MODELLING CANOPY GAP FRACTION FROM LIDAR INTENSITY
Lidar gap fraction leaf area index intensity Beer-Lambert
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2015/11/10
We reconstruct the vertical pulse power distribution returned from a commercial small footprint discrete pulse airborne laser terrain mapper within a mixed forest landscape. By modifying a Beer-Lamber...
Clinical Determinants of Left Ventricular Ejection Fraction Deterioration in Patients Suffered From Complete Left Bundle Branch Block
Bundle-Branch Block Coronary Artery Left Ventricular Ejection Fraction
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2015/10/20
Background: Recently, the deleterious effects of left bundle branch block (LBBB) on left ventricular systolic function have been taken into consideration.
SIMULATING CANOPY GAP FRACTION OF COMPLEX 3D FOREST SCENES OF PICEA SITCHENSIS (SITKA SPRUCE)
Forestry 3D canopy modelling gap fraction
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2015/9/8
We present an application of 3D canopy modelling for assessing the structural accuracy of complex 3D structural models of
Sitka spruce. Such models can be used to simulate canopy reflectance at the l...
Use of landsat tm fraction images to quantify the optical and sar data relationships for land cover discrimination in the brazilian amazonia
Amazonia Fraction Images Landsat TM
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2015/8/21
This paper presents a comparison between L-band HH JERS-1 SAR and Landsat TM data for land cover assessment in an Amazonian
test site. For this, a study area located in the south of Rondo坣ia State, w...
Location of Fraction-Saturated Areas in Watershed Using Empirically Calculated Topographical Index
VSA Water balance critical values shallow soils Shivalik region of India India
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2015/8/14
In engineering practice, simple methods are important for predicting runoff from watersheds particularly for flood forecasting and water balance calculations. In the present study, it is illustrated t...
MODULAR CURVES AND RAMANUJAN’S CONTINUED FRACTION
modular curve Ramanujan continued fraction
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2015/7/6
We use arithmetic models of modular curves to establish some properties of Ramanujan’s continued fraction. In particular, we give a new geometric proof that its singular values are algebraic units
th...
ERRATUM TO MODULAR CURVES AND RAMANUJAN’S CONTINUED FRACTION
q-series modular curve Ramanujan continued fraction
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2015/7/6
This lemma is already false for k = p quite generally, and our error in the proof of the
lemma occurs in the line beginning “Evidently. . . ” (the formula given for (k, m+jk/p)
in that line is wrong...
Nutritive value of maize and sorghum silages: fibre fraction degradation and rumen microbial density in buffalo cows
Italian Mediterranean buffalo rumen microorganism rumen degradability silages
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2015/7/2
Sorghum could be a potential substitute to maize in Mediterranean buffaloes feed in order to improve sustainability of buffalo-based agriculture, due to its reduced water and nitrogen requirements com...
CROP GROUND COVER FRACTION AND CANOPY CHLOROPHYLL CONTENT MAPPING USING RAPIDEYE IMAGERY
julius-Kühn-Institute (JKI), Federal Research Centre for Cultivated Plants
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2015/5/6
Remote sensing is a suitable tool for estimating the spatial variability of crop canopy characteristics, such as canopy chlorophyll content (CCC) and green ground cover (GGC%), which are often used ...