理学 >>> 数学 信息科学与系统科学 物理学 化学 天文学 地球科学总论 大气科学 地球物理学 地理学 地质学 水文学 海洋科学 生物学 科学技术史
搜索结果: 1-15 共查到理学 U-net相关记录77条 . 查询时间(0.093 秒)
Complex nonlinear interplays of multiple scales give rise to many interesting physical phenomena and pose major difficulties for the computer simulation of multiscale PDE models in areas such as reser...
MIT’s Plasma Science and Fusion Center (PSFC) will substantially expand its fusion energy research and education activities under a new five-year agreement with Institute spinout Commonwealth Fusion S...
利用密度泛函理论和非平衡态格林函数相结合的方法,系统地研究了边修饰Net-Y纳米带的电子结构和器件特性的应变调控效应。计算表明:本征纳米带为金属,但边缘的氢或氧原子端接能使其转变为半导体。应变能有效地调控纳米带带隙的大小,适当的应变使能带结构从间接带隙转变为较小的直接带隙,这有利于光的吸收。应变也能改变纳米带的功函数,压缩应变能明显减小功函数,这有利于纳米带实现场发射功能。特别是应变能有效地调控纳...
The relationship between net primary productivity (NPP) and phenological changes is of great significance to the study of regional ecosystem processes. In this study, firstly, NPP was estimated with t...
近日,中国科学院物理研究所/北京凝聚态物理国家研究中心研究员王建涛、博士聂思敏、研究员翁红明,日本东北大学教授川添良幸,美国内华达大学教授陈长风合作,通过第一性原理计算,提出一个新的三维碳烯晶体结构【图1(a)】。该结构具有体心正方对称性(I4/mmm),单位晶胞包含40个碳原子,因此简称为BCT-C40。它可以看做是一维(5,5)碳纳米管的三维重构形式,但能量上比(5,5)碳纳米管、fcc-C6...
近日,中国科学院物理研究所/北京凝聚态物理国家研究中心研究员王建涛、博士聂思敏、研究员翁红明,日本东北大学教授川添良幸,美国内华达大学教授陈长风合作,通过第一性原理计算,提出一个新的三维碳烯晶体结构【图1(a)】。该结构具有体心正方对称性(I4/mmm),单位晶胞包含40个碳原子,因此简称为BCT-C40。它可以看做是一维(5,5)碳纳米管的三维重构形式,但能量上比(5,5)碳纳米管、fcc-C6...
We propose the elastic net, a new regularization and variable selection method. Real world data and a simulation study show that the elastic net often outperforms the lasso, while enjoying a similar s...
Quasi-Monte Carlo (QMC) sampling has been developed for integration over [0;1]s where it has superior accuracy to Monte Carlo (MC) for integrands of bounded variation.
Accurate modelling of the carbon cycle strongly depends on the parametrization of its underlying processes. The Carbon Cycle Data Assimilation System (CCDAS) can be used as an estimator algorithm t...
The subarctic–subtropical transition zone in the North Pacific represents the second largest sink of atmospheric carbon dioxide in the world ocean, yet the relative importance of physical and biologi...
Two New England salt marshes exposed to different N availability were assessed seasonally for 1 yr, creating the first complete salt marsh Si budgets. Triplicate seasonal measurements were collected f...
A comparative slaughter trial was conducted to estimate the phosphorus (P) requirement for maintenance and growth of crossbred lambs of Dorper with a Chinese indigenous sheep breed, thin-tailed Han sh...
The aim of this study was to compare the estimation capability of two different process-based NPP models (CASA and LPJGUESS) in a Mediterranean watershed. Remotely sensed data and climate time series ...
We hypothesized that mats of a nonnative macroalga, Gracilaria vermiculophylla, which is often found incorporated several centimeters into intertidal mudflat sediments, would increase net denitrifica...
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks ...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...