Results 21 to 30 of about 683,309 (146)

Hollow Microsphere‐Modified Asymmetric Multilayer Nanocomposites With Low Reflectivity and High Electromagnetic Shielding Performance

open access: yesRare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Electromagnetic interference (EMI) shielding materials with low reflectivity are ideal materials for addressing the pollution caused by electromagnetic radiation. Ti3C2Tx MXene is widely used for EMI shielding due to its excellent conductivity.
Guirong Hu   +6 more
wiley   +1 more source

Simultaneous Generation of Topographic Models and Manning Roughness Coefficient Maps From Tri‐Stereoscopic Satellite Images: Application to the Huarmey River, Peru

open access: yesThe Photogrammetric Record, Volume 41, Issue 195, July‐September 2026.
Tri‐stereoscopic PeruSat‐1 imagery enables the simultaneous generation of 0.70 m‐resolution topography and spatially distributed Manning roughness maps, achieving 0.434 m vertical accuracy. Integrated into HEC‐RAS, these products provide consistent, high‐resolution inputs that improve hydraulic modelling and flood risk assessment in data‐scarce river ...
Jorge L. Miranda‐Pita   +3 more
wiley   +1 more source

Representation of obligate groundwater‐dwelling copepod diversity in European protected areas

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract Groundwaters sustain diverse surface ecosystems and are populated by metazoan species, mostly invertebrates, that provide fundamental ecological functions and are often of prominent conservation value due to narrow endemism and high phylogenetic rarity.
Francesco Cerasoli   +7 more
wiley   +1 more source

自适应光学系统的模式法数值模拟

open access: yes, 1998
建立了利用模式法(Zernike多项式展开法)对自适应光学系统进行数值模拟的理论模型,编制了计算程序,并与激光大气传输计算程序衔接起来 ...
陈涉, 张德良, 严海星, 李树山
core   +1 more source

Biodiversity‐driven spatial conservation planning to delineate temporally stable regions

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract The accelerating loss of biodiversity underscores the critical need for effective conservation strategies, particularly in the face of climate change and anthropogenic pressures. We devised a conservation planning framework that adopts a temporal stacking approach to species distribution models and landscape connectivity analyses. These models
Mattia Iannella   +5 more
wiley   +1 more source

油藏数值模拟技术及系统

open access: yes四川大学学报. 自然科学版, 1994
油藏数值模拟技术及系统黄金姬(计算机科学系)油藏数值模拟技术是油田开发决策中一门新兴的应用技术。为适应油田开发的需要,制定科学的油田开发方案作好基础工作。我们研究开发出“油藏数值模拟技术及系统”,能使油藏数值模拟计算和前后处理技术一体化。1RNSTS...
黄金姬
doaj  

First‐trimester prediction and prevention of preterm pre‐eclampsia in women with chronic hypertension

open access: yesUltrasound in Obstetrics &Gynecology, Volume 67, Issue 5, Page 613-622, May 2026.
ABSTRACT Objectives To evaluate the effect of aspirin on gestational age at delivery due to preterm pre‐eclampsia (PE) in women with chronic hypertension (CH), to assess the predictive performance of the Fetal Medicine Foundation (FMF) first‐trimester competing‐risks model for preterm PE in this high‐risk group and to evaluate how parity, previous PE ...
D. L. Rolnik   +23 more
wiley   +1 more source

连续管钻井系统摩阻计算方法与试验研究

open access: yesShiyou jixie, 2015
连续管应用越来越广泛,但是由于连续管管径小、流阻大等特点,系统性地研究连续管钻井系统摩阻压降已迫在眉睫。基于理论研究,筛选相关计算模型,得到了符合连续管钻井实际的摩阻计算模型;筛选了4种数值模拟计算模型,并进行多盘管规格和多流量的数值模拟计算,通过分析计算结果与理论计算的误差,采用标准κepsilon模型作为数值模拟计算模型更为合适。开展了连续管钻井系统盘管摩阻压降试验,将理论计算、数值模拟计算与试验数据进行比较,在绝大多数试验流量测点处,它们的误差范围均在10%以下 ...
周博   +5 more
doaj  

Synergistic Electron Density and Oxygen Defect Regulation in Fluorite High‐Entropy Oxides for Superior Ionizing Radiation Shielding

open access: yesRare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan   +9 more
wiley   +1 more source

Visual Basic在油藏数值模拟中的应用

open access: yes, 2008
随着油藏数值模拟技术的发展以及油藏数值模拟软件的不断改进和完善,油藏数值模拟软件在油田开发中的应用越来越广泛。对油藏数值模拟软件计算出的数据进行整理不仅枯燥而且花费了大量时间。本文利用Visual Basic语言编制了处理ECLIPSE软件生成的油气田开发指标数据软件(RSMAN)。该软件方便了油气田开发指标的整理和汇总,软件界面友好 ...
孟照娟, 冯汝勇, 刘洋
core   +1 more source

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