检索结果-南通市图书馆

Multi-threaded compression of Earth observation time-series data

International Journal of digital Earth 2017年第12期10卷 1214-1230页

作者： d.swanepoel F.van den Bergh Remote Sensing Research Unit Meraka InstituteCSIRPretoriaSouth Africa

Earth observation data are typically compressed using general-purpose single-threaded compression algorithms that operate at a fraction of the bandwidth of modern storage and processing *** present evidence that recently developed multi-threaded compression codecs offer substantial benefits over widely used single-threaded codecs in terms of compression efficiency when applied to a selection of moderate resolution imaging spectroradiometer(MOdIS)datasets stored in the HdF5 *** codecs from the LZ77 and Rice families are shown to vary in efficacy when applied to different MOdIS data products,highlighting the need for compression strategies to be tailored to different classes of *** also introduce LPC-Rice,a new multi-threaded codec,that performs particularly well when applied to time-series data.

关键词： data compression multithreading time-series HdF HdF5 MOdIS

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Productivity Evaluation of Four Medicago sativa Cultivars under Two Water Regimes (Irrigated and Non-Irrigated) and Two Soil Types at Bathurst Research Station in the Eastern Cape Province, South Africa

引用

Agricultural Sciences 2022年第3期13卷 438-447页

作者： Mhlangabezi Solontsi Mfundo Phakama Maqubela Johan Adam van Niekerk Jan Willem swanepoel Gideon Jordaan Unathi Gulwa Sive Tokozwayo Nkululeko Nyangiwe department of Rural development and Agrarian Reform D&#246 hne AdI Stutterheim South Africa Centre for Sustainable Agriculture University of Free State Bloemfontein South Africa department of Rural development and Agrarian Reform Cradock Experimental Farm Cradock South Africa department of Agriculture and Animal Health University of South Africa Pretoria South Africa

Medicago sativa (lucerne) is a perennial and drought tolerant fodder crop which is widely used as feed for livestock in South Africa. This study evaluated four lucerne cultivars under two water regimes and also determined the effect of soil type on lucerne biomass production. To determine dry matter production per cultivar per treatment, a random grid (quadrant) sampling method was used and all biomass within that radius was cut to 5 cm above the ground level in each plot. All biomass sampling was done just before regrowth commences. Biomass data collection on four lucerne cultivars belonging to different dormancy groupings (WL 711, WL 525 HQ, KKS 9911 and SA Standard) were collected seasonally under different soil types on both irrigated and non-irrigated plots and analysed. Soil type (site) had a significant (P dry matter produced as more dry matter was produced in site 2 (S2) in comparison to site 1 (S2). different levels of water application (moisture supplementation) also affected the quantity of dry matter produced in each soil type. The once-a-month irrigation treatment (Ir1) led to the production of superior dry matter yield on SI even though the effect was not significant. In S2 twice a month irrigation treatment (Ir2) produced the highest dry matter, however, this effect was significant (P ductive cultivar in S1, while the same cultivar was the least productive cultivar in S2. These findings show that both soil type and irrigation levels had a significant (P dry matter production of the tested Lucerne cultivars belonging to different dormancy groupings.

关键词： Biomass Cultivar dry Matter dormancy Groupings

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wearable multifunctional printed graphene sensors

引用

npj Flexible Electronics 2019年第1期3卷 132-141页

作者： Altynay Kaidarova Mohammed Asadullah Khan Marco Marengo Liam swanepoel Alexander Przybysz Cobus Muller Andreas Fahlman Ulrich Buttner Nathan R.Geraldi Rory P.Wilson Carlos M.duarte Jurgen Kosel Computer Electrical and Mathematical Sciences&Engineering(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955Saudi Arabia Mechanical Engineering 7600 Stellenbosch UniversityStellenboschSouth Africa Carrer d’Eduardo Primo Yúfera 146013 ValenciaSpain Red Sea Research Center(RSRC)and Computational Biosciences Research Center King Abdullah University of Science and Technology(KAUST)Kingdom of Saudi ArabiaThuwal 23955Saudi Arabia Swansea Lab for Animal Movement BiosciencesSwansea UniversitySwansea SA28PP WalesUK

The outstanding properties of graphene have initiated myriads of research and development;yet, its economic impact is hamperedby the difficulties encountered in production and practical application. Recently discovered laser-induced graphene is generated bya simple printing process on flexible and lightweight polyimide films. Exploiting the electrical features and mechanical pliability ofLIG on polyimide, we developed wearable resistive bending sensors that pave the way for many cost-effective measurementsystems. The versatile sensors we describe can be utilized in a wide range of configurations, including measurement of force,deflection, and curvature. The deflection induced by different forces and speeds is effectively sensed through a resistancemeasurement, exploiting the piezoresistance of the printed graphene electrodes. The LIG sensors possess an outstanding range forstrain measurements reaching >10% A double-sided electrode concept was developed by printing the same electrodes on bothsides of the film and employing difference measurements. This provided a large bidirectional bending response combined withtemperature compensation. Versatility in geometry and a simple fabrication process enable the detection of a wide range of flowspeeds, forces, and deflections. The sensor response can be easily tuned by geometrical parameters of the bending sensors and theLIG electrodes. As a wearable device, LIG bending sensors were used for tracking body movements. For underwater operation,PdMS-coated LIG bending sensors were integrated with ultra-low power aquatic tags and utilized in underwater animal speedmonitoring applications, and a recording of the surface current velocity on a coral reef in the Red Sea.

关键词： underwater printing utilized

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

仅由波长测量来确定薄膜的折射率和厚度

引用

中国检验检测 1987年第1期 9-13页

作者： R.swanepoel 钟国林

一、前言厚度为1μm的薄膜在光电子学领域是一种被广泛研究的对象。这类薄膜的厚度是一个重要的参数,它能够由膜屑的透射光谱用非破坏方法确定。由透射光谱还可以得到折射率n(λ)的值。透明基片上薄膜的光学透射理论已为许多工作者所研... 详细信息

一、前言厚度为1μm的薄膜在光电子学领域是一种被广泛研究的对象。这类薄膜的厚度是一个重要的参数,它能够由膜屑的透射光谱用非破坏方法确定。由透射光谱还可以得到折射率n(λ)的值。透明基片上薄膜的光学透射理论已为许多工作者所研究。透射 T 的表达式通常是 n 和 d 的

关键词：方程波长线光谱常数数学透射光谱厚度

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：