【摘 要】
:
The talk is concerned with optimal L2 error estimates for the velocity approximation in a nonconforming finite element approximation for the incompressible Stokes equation as proposed in [1].The contr
【机 构】
:
Univ.of Hamburg Weierstrass Inst.
论文部分内容阅读
The talk is concerned with optimal L2 error estimates for the velocity approximation in a nonconforming finite element approximation for the incompressible Stokes equation as proposed in [1].The contribution of this presentation is to show that also optimal velocity estimates in L2,independent of the pressure,can be derived.
其他文献
1.Introduction Cu/SAPO-34 emerged as a new leading candidate among zeolite formulations compared to the Cu/ZSM-5 and Cu/beta,due to their superior NH3-SCR activity and prominent hydrothermal stability
本文建立了一种流动注射(FI)编结反应器(KR)快速分离富集二次气体分隔洗脱法火焰原子吸收(FAAS)测定不同盐度海水中痕量溶解态锌的新方法.进样流速6.0 mL·min-1;进样时间60 s,测定 20μg·L-1的锌,浓集系数(EF)由传统方法的9.4提高到22.5;测样频率为28·h-1;检出限为0.34μg·L-1;相对标准偏差(RSD,n =11)为2.3%.将该新方法应用于珠江口不同盐
药物和个人护理品(PPCPs)被认为是一类新型污染物,在环境水体中检出频率高、持续时间长且对人类和水生生物具有潜在的危险性,所以近十年来引起了环境科学工作者的极大关注[1,2].
水质基准是制定水质标准的科学依据,在水环境保护方面发挥着非常重要的作用.研究和颁布水质基准的目的在于防止污染物对重要的商业和娱乐水生生物,以及其他重要物种如河流湖泊中的鱼、底栖无脊椎动物和浮游生物造成不可接受的长期和短期的效应前景[1].
大气硝基(NO3)自由基是对流层大气化学反应的核心物种,对于理解大气氧化性、二次有机气溶胶生成、活性卤素化学、和全球硫素循环等对流层大气化学研究的关键问题具有重要意义.NO3自由基反应活性高、大气寿命短、浓度低,其定量分析非常具有挑战性.
砷(As),是一种广泛分布于环境中的重金属污染物.长期砷暴露可引起心血管疾病、糖尿病、皮肤及神经功能损伤、免疫紊乱等,可致多组织癌变,对人体健康具有重要影响[1].邻苯二甲酸酯(PAEs) 作为目前最为常用的PAEs之一,因其高毒性、难降解及持久性等特点,已引起了国内外学者的广泛关注[2].
珠江三角洲(珠三角)社会经济发展迅速,目前是中国乃至世界的重要制造业基地,同时也是世界上城市与人口最密集的地区之一.在过去三十年,珠三角的快速工业化和城市化已经带来了包括重金属污染在内的一系列环境污染问题.
Novel models in science and engineering are governed by nonlinear integro-differential equations with increasing complexity which demand innovative techniques in both analysis and computation,such as
Using tools from compressive sensing and matrix concentration,we provide quantitative guarantees for the accuracy of leave-p-out cross validation towards model selection and error estimation in functi
Description In recent years,great progress has been achieved in the construction and understanding of divergence-free methods for incompressible flow problems,and in understanding the role of related