In this paper, we study the challenge of feature selection based on a relatively small collection of sample pairs {(xi , yi)}1≤i≤m. The observations yi ∈ R are thereby supposed to follow a noisy single-index model, depending on a certain set of signal variables. A major difficulty is that these variables usually cannot be observed directly, but rather arise as hidden factors in the actual data ...

the complexity of the genetic control of drought tolerance makes inevitable using of molecular methods with biometric approaches to its improvement in plants. present study was conducted by 121 advanced lines and varieties of soybean under two moisture levels, normal and drought stress with 21 microsatellite markers linked to drought tolerance in two regions, namely, rasht and gonbad-kavous. gr...

Hailu Luo, Wei Hu, Xunong Yi, Haiying Liu, and Jing Zhu Laboratory of Light Transmission Optics, South China Normal University, Guangzhou 510630, China (Dated: June 8, 2006) Abstract It is found that the amphoteric refraction, i.e. the refraction can be either positive or negative depending on the incident angles, could occur at a planar interface associated with a uniaxially anisotropic positi...

Yield under water stress (YS) is used as the main criterion in the selection of wheat varieties for dry Mediterranean environments. It has been proposed that selection of genotypes using YS assisted by morphological and physiological traits associated with YS is more efficient in selecting high yielding genotypes for dry environments. A study was carried out at the Antumapu Experiment Station o...

Alcohol intake has been associated with higher blood pressure in acculturated populations but not in unacculturated societies. We performed a cross-sectional survey of a random community sample of 5023 male Yi rural farmers and 1656 Yi and 2173 Han men living in an urban setting. Average alcohol intake among drinkers was 36.4 g/d in Yi farmers, 56.5 g/d in Yi migrants, and 38.7 g/d in Han men. ...

Efficient and quick yield prediction is of great significance for ensuring world food security crop breeding research. The rapid development unmanned aerial vehicle (UAV) technology makes it more timely accurate to monitor crops by remote sensing. objective this study was explore the method developing a novel index (YI) with wide adaptability fusing vegetation indices (VIs), color (CIs), textur...

From 2003 to 2016, 1,649 samples were collected, covering both the time and space of Gulf Tonkin. The results have identified groups seasonal dominant fish eggs larvae: Seven species in Spring, nine Summer, six Autumn, four Winter. index (Yi) ranges from 0.02 0.26 depending on group each season year, highest Goby - Gobiidae (Yi = 0.26) achieved followed by Herringgroup Clupeidae reaches Yi 0.20...

in order to determine the appropriate plant density of spotted bean in yasouj, a field experiment was conducted in 2008 as a factorial in a randomized complete block design with three replications. three spotted bean cultivars (keshavarzi, talash and oshtori) were sown at five plant densities (10, 20, 30, 40 and 50 plant.m-2). results showed that effect of plant density, cultivar and interactio...

according to urgent need of corn to nitrogen and since this element play a main role in improving of yield corn, thus, in order to investigate the effect of different levels of urea on yield and yield components of corn 704, an experiment was conducted randomized block with three replications in cropping year of 2012. experimental treatments included six levels of urea (0, 30, 60, 90, 120 and 1...