近年来,全球极端气候致使暴雨频发,深圳市也频繁遭遇暴雨内涝灾害,影响城市运行。如何保障城市排水防涝安全,成为城市发展亟待解决的热点和难点问题。针对内涝顽疾,国务院、住建部、广东省政府相继发文,要求加强雨水排放管理,构建城市排水防涝数学模型,提高城镇内涝防治水平。2014年至2016年,结合空间基础信息平台,深圳市系统建立了深圳市排水防涝数学模型,并开展了动态维护,持续为深圳市排水防涝精细化管理提供
小麦垂直农场(vertical wheat farms,VWF)是在传统的二维农业模式基础上,近几十年发展起来的新型三维立体农业种植模式,具有单位土地面积利用效率高、环境友好、绿色无公害、
In this paper,a series of ReaxFF molecular dynamic simulations were performed to study the oxidation of chemical passivated silicon(100) surface,which was termi
Main observation and conclusion Alkoxy radical-mediated carbon-carbon bond cleavages have emerged as a powerful strategy to complement traditional ionic-type transformations.However,carbon-carbon cleavage reaction triggered by alkoxy radical intermediate
High CO pressure (＞ 40 bar) is usually needed in radical carbonylation reactions in the absence of metal catalyst.In this communica-tion,we developed a transitio
Natural products and their derivatives have long been used as medicinal agents,and they still make up a significant fraction of clinically approved drugs.Natura
在中国,有情怀的古镇有很多,如丽江、凤凰、婺源、周庄、乌镇……它们宛如一颗颗明珠,镶嵌在中华大地上,散发着迷人的光泽。在广西北海,也有一个形成于19世纪的古镇,面朝烟波浩渺的廉州湾,静静地偏于城市一隅,至今仍保留着纯正的渔家生活风貌。它,就是高德古镇。历史记载,高德是北海开埠较早的港口之一,
The first example of Rh-catalyzed kinetic resolution of 1,3-disubstituted allene-1,3-dienes involving intramolecular[4+2]-cycloaddition has been developed.Follo
基于密度泛函理论和卡里普索结构预测方法,系统研究了 VnB8(n+1)-(n=1-3)团簇的几何结构、电子和光谱特性.首先,利用卡里普索结构预测方法确定了 VB16-的基态结构为高对称性
The reaction of 2-alkynylanisoles/sulfides with SOCl2 and DMSO was conducted to conveniently furnish the biologically interesting 3-(methylthio)-benzo[b]furans/