Isotopic signature is a powerful tool to discriminate methane(CH
4) source types and constrain regional and global scale CH
4 budgets.Peatlands on the Qinghai-Tibetan Plateau are poorly understood about the isotopic signature of CH
20世纪教育学语言现代化的标志是语言的科学化、实践化和逻辑化,而现代化发展离不开语言的本土化和综合化。中国教育学语言现代化发展受到内、外两重因素的影响,内因是指文言语体向白话语体的转型,外因是指赫尔巴特、杜威和凯洛夫教育学语言的影响。在教育学语言走向现代化的历程中,存在着对教育学语言认识程度不深,与教育学科发展、教育现代化发展联系不紧密,忽视我国传统言说方式的独特价值以及过于依赖西方教育学语言发展路径等问题。基于语言应用的视角,通过对中国传统学术语言载体文言的分析,指出我国教育学语言走向现代化应促进汉语自
Main observation and conclusionrnRecently,the polymer solar cells (PSCs) based on the PM6 and small molecular acceptor (SMA) Y6 have attracted considerable atte
Manganese is ubiquitous in terrestrial environ-ments and most studies have focused on dissolution of Mn oxides,but aluminosilicates also release Mn.Here,we eval
Main observation and conclusionrnA method for photoinduced Nal-promoted radical borylation of aliphatic halides and pseudohalides with bis(catecholato)diboron(B
Main observation and conclusionrnSelenoesters are useful substitutes for traditional thioesters in protein ligation chemistry due to their high reactivity in th
虚拟现实仿真系统平台架构的功能模块庞杂性问题给系统平台设计提出了更高的要求,其拓展性与移植性、实时性与互操作性、人机交互性等性能要求是亟需解决的问题。以船舶水下工程作业实例为设计基础,基于高层体系架构(High-Level Architecture,HLA)提出一种面向多客体的虚拟现实仿真平台构建优化方案。根据水下作业流程,进行全生命周期概念设计。分析并明确系统功能与设计原则。基于HLA技术框架,以虚拟现实技术作为功能导向,对仿真系统进行模块划分,并给出联邦架构。通过实践,验证其优化性能。结果表明,虚拟现
Main observation and conclusionrnBioorthogonal click chemistry has emerged as a powerful tool for the specific modification of proteins in complex mixtures.Meta
Main observation and conclusionrnA copper-catalyzed radical cyclization of cyclobutanone oxime esters and vinyl azide is described.This method provides facile a