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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Estimating Time-Varying Networks for High-Dimensional Time Series
高维 时间序列 时变网络
2023/4/25
We explore time-varying networks for high-dimensional locally stationary time series, using the large VAR model framework with both the transition and (error) precision matrices evolving smoothly over...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Estimating Factor-Based Spot Volatility Matrices with Noisy and Asynchronous High-Frequency Data
噪声 异步高频 数据估算 因子 现货波动率 矩阵
2023/5/4
With noisy and asynchronous high-frequency data collected for an ultra-large number of assets, we estimate high-dimensional spot volatility matrices satisfying a low-rank plus sparse structure. A loca...
南京农业大学农学院《Remote Sensing of Environment》发表智慧农业团队“Estimating leaf nitrogen content by coupling a nitrogen allocation model with canopy reflectance”（图）
智慧农业 光谱监测 植物光合
2023/10/28
2022年11月1日，农学院智慧农业团队在国际顶级遥感期刊《Remote Sensing of Environment》发表了题为“Estimating leaf nitrogen content by coupling a nitrogen allocation model with canopy reflectance”的研究论文，报道了他们在冠层尺度氮含量光谱监测普适性模型构建方面的重要进展...
Evaluation of gestation length and birth weight of offspring of Polish native cattle breeds in context of estimating genetic parameters
pregnancy birth body weight heritability native breed
2018/11/23
Research material included data on gestation length of 15 436 cows of Polish native breeds. These were: White Backed (BG; 324 records), Polish Red (RP; 5396 records), Polish Black and White (ZB; 3508 ...
ESTIMATING HOUSING VACANCY RATE IN QINGDAO CITY WITH NPP-VIIRS NIGHTTIME LIGHT AND GEOGRAPHICAL NATIONAL CONDITIONS MONITORING DATA
Housing vacancy rate (HVR) NPP-VIIRS Nighttime light data Geographic National Conditions Monitoring Data (GNCMD) resident population distribution data SVM Moran's I
2018/5/15
Accompanying China's rapid urbanization in recent decades, especially in the new millennium, the housing problem has become one of the most important issues. The estimation and analysis of housing vac...
ESTIMATING PM2.5 IN XI’AN , CHINA USING AEROSOL OPTICAL DEPTH OF NPP VIIRS DATA AND METEOROLOGICAL MEASUREMENTS
Aerosol optical depth PM2.5 VIIRS Remote sensing inversion Nonlinear model
2018/5/16
In recent years, the air pollution is becoming more and more serious, which not only causes the decrease of the visibility, but also affects the human health. As the most important pollutant particula...
It has long been viewed that the analysis of sodium excretion in a morning “spot” urine sample is a valuable measure to estimate salt intake of the previous day. A study in this issue of the Journal s...
Estimating the reliability of glycemic index values and potential sources of methodological and biological variability
glycemic index variability healthy volunteers insulin index glycated hemoglobin
2018/12/18
Background: The utility of glycemic index (GI) values for chronic disease risk management remains controversial. Although absolute GI value determinations for individual foods have been shown to vary ...
Models for Estimating Genetic Parameters of Milk Production Traits Using Random Regression Models in Korean Holstein Cattle
Random Regression Model Test Day Yield Milk Production Heritability Holstein
2016/5/20
The objectives of the study were to estimate genetic parameters for milk production traits of Holstein cattle using random regression models (RRMs), and to compare the goodness of fit of various RRMs ...
Accuracy of Estimating Genetic Distance between Species from Short Sequences of Mitochondrial DNA
Estimating Genetic Distance Mitochondrial DNA
2015/12/17
Recent advances in molecular techniques allow rapid determination of genetic
divergence, and in many circumstances the polymerase chain reaction (PCR) and
DNA sequencing have become the technologi...
Estimating the Impact of Restructuring on Electricity Generation Efficiency: The Case of the Indian Thermal Power Sector
Generation Efficiency Restructuring
2015/9/18
We thank Resources for the Future, the World Bank Research Board and the KCP Trust Fund for research
support and John Besant-Jones for helpful comments. The findings and conclusions of this paper are...
The role of the high resolution weather forecast in estimating the run-offusing a simple hydrological model
high resolution forecast heavy precipitation
2015/9/16
Recent and repeated episodes of severe weather in Italy have stressed the need to have a suffi ciently accurate forecast
to give adequate warning to the involved areas. The impact of the precipitatio...
The state of a collection of phase-locked oscillators is determined by a single phase variable or cyclic
coordinate. This paper presents a computational method, Phaser, for estimating the phase of ph...
ASYMPTOTIC EQUIVALENCE OF ESTIMATING A POISSON INTENSITY AND A POSITIVE DIFFUSION DRIFT
ASYMPTOTIC EQUIVALENCE ESTIMATING A POISSON INTENSITY POSITIVE DIFFUSION DRIFT
2015/8/25
We consider a diffusion model of small variance type with positive drift density varying in a nonparametric set. We investigate Gaussian and Poisson approximations to this model in the sense of asympt...
Estimating Random Variables from Random Sparse Observations
Discrete random variable random function decoupling principle
2015/8/21
Let X1, . . . ,Xn be a collection of iid discrete random variables, and Y1, . . . , Ym a set of noisy observations of such variables. Assume each observation Ya to be a random function of some a rando...