搜索结果: 1-15 共查到“理学 variation”相关记录338条 . 查询时间(0.125 秒)
南京农业大学农学院《New Phytologist》发表植物环境适应分子遗传研究课题组“A major gene for chilling tolerance variation in Indica rice codes for a kinase OsCTK1 that phosphorylates multiple substrates under cold”（图）
植物环境 分子遗传
2024/4/29
水稻起源于热带和亚热带，对低温十分敏感，当温度低于15℃时水稻便无法正常生长。有统计显示，每年低温冷害导致我国水稻减产约50亿kg。近年来，因直播稻大面积推广以及水稻种植区域不断由热带、亚热带向高海拔、高纬度地区扩张，水稻遭受低温冷害的频率有增加趋势。低温冷害已成为限制我国水稻生产的一大瓶颈。因此，挖掘调控水稻耐冷性的关键基因，研究其作用机理，对防控水稻低温冷害具有重要意义。
创新沙龙】杨琼副研究员分享“A Diversity and regional variation of endosymbiosis in Myzus persicae and Rhopalosiphum padi”（图）
创新沙龙 澳大利亚 墨尔本大学 杨琼 昆虫体内 共生菌
2024/5/23
2024年1月4日下午，第90期创新沙龙“A Diversity and regional variation of endosymbiosis in Myzus persicae and Rhopalosiphum padi”主题分享会在植保楼2060A会议室举行。本次分享会的嘉宾是澳大利亚墨尔本大学生物科学学院的杨琼副研究员，共有五十余名师生参会，现场气氛热烈。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Functions of bounded variation and nonlocal functionals
有界 变差函数 非局部泛函
2023/11/29
In the past two decades, starting with the pioneering work of Bourgain, Brezis, and Mironescu, there has been widespread interest in characterizing Sobolev and BV (bounded variation) functions by mean...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Introduction to Bourguignon-Gauduchon's variation formula for Dirac operators
Dirac算子 Bourguignon-Gauduchon 变分公式
2023/11/13
我们将介绍由Bar-Gauduchon-Moroianu给出的spin流形上Dirac算子在度量变化时一阶变分公式的证明。作为应用，我们将计算Dirac算子沿Ricci flow的一阶变分。
Spatial and seasonal variation of water parameters, sediment properties, and submerged macrophytes after ecological restoration in a long-term (6 year) study in Hangzhou west lake in China
Hangzhou west lake macrophytes ecological restoration
2021/7/28
Submerged macrophyte restoration is the key stage in the reestablishment of an aquatic ecosystem.
MONITORING OF AGRICULTURAL DROUGHT USING FORTNIGHTLY VARIATION OF VEGETATION CONDITION INDEX (VCI) FOR THE STATE OF TAMIL NADU, INDIA
Agricultural drought monitoring Vegetation condition index (VCI) Drought severity map Geographic Information Systems (GIS) Normalized differenced vegetation index (NDVI)
2018/11/9
India being an agrarian nation widely depends upon rainfall for its agricultural productivity. The failure of rainfall and hence shortfall of productivity badly affects national economy. With an intri...
SPATIAL AND TEMPORAL VARIATION OF LAND SURFACE TEMPERATURE IN FUJIAN PROVINCE FROM 2001 TO 2015
Land surface temperature, Savitzky Golay (S-G) filter, Slope analysis, Spatial and temporal variations, Fujian province
2018/5/14
Land surface temperature (LST) is an essential parameter in the physics of land surface processes. The spatiotemporal variations of LST on the Fujian province were studied using AQUA Moderate Resoluti...
DESPECKLING POLSAR IMAGES BASED ON RELATIVE TOTAL VARIATION MODEL
PolSAR, Despeckling Relative Total Variationl Wishart Measure PolRTV
2018/5/14
Relatively total variation (RTV) algorithm, which can effectively decompose structure information and texture in image, is employed in extracting main structures of the image. However, applying the RT...
Analysis on variation characteristics of geothermal response in Liaoning Province
Average initial formation temperature Average thermal conductivity Formation temperature recovery Thermal response Liaoning Province
2018/3/23
Due to energy shortage and increasing environmental awareness, resources in shallow underground space have been rapidly exploited and utilized. So that studying variation characteristics of geothermal...
Study Finds Variation Within Species Is A Critical Aspect Of Biodiversity（图）
Variation Within Species Critical Aspect Biodiversity
2017/12/19
Concerns about biodiversity tend to focus on the loss of species from ecosystems, but a new study suggests that the loss of variation within species can also have important ecological consequences.Man...
Baby Fish Exercising,a Surprising Source of Adaptive Variation in Fish Jaws（图）
Baby Fish Exercising Adaptive Variation Fish Jaws
2017/9/1
An unspoken frustration for evolutionary biologists over the past 100 years, says Craig Albertson at the University of Massachusetts Amherst, is that genetics can only account for a small percentage o...
Differences in genetic and environmental variation in adult BMI by sex, age, time period, and region: an individual-based pooled analysis of 40 twin cohorts
BMI adults genetics twins international comparisons
2018/11/15
Background: Genes and the environment contribute to variation in adult body mass index [BMI (in kg/m2)], but factors modifying these variance components are poorly understood.
NEW RESEARCH LOOKS AT GENETIC VARIATION IN A HUMAN COMMENSALIST TOAD
GENETIC VARIATION HUMAN COMMENSALIST TOAD
2016/2/22
Most species are negatively affected when humans transform natural habitats into urban areas and agricultural lands, but a few species actually benefit from these activities. These species — called hu...
FIRST VARIATION OF THE GENERAL CURVATURE-DEPENDENT SURFACE ENERGY
Surface energy gradient fl ow mean curvature
2015/12/11
We consider general surface energies, which are weighted integrals
over a closed surface with a weight function depending on the position, the
unit normal and the total curvature of the surface. Ene...
Colony variation in the collective regulation of foraging by harvester ants
Colony variation harvester ants
2015/12/10
This study investigates variation in collective behavior in a natural population of colonies of the harvester ant, Pogonomyrmex
barbatus. Harvester ant colonies regulate foraging activity to adjust t...