نتایج جستجو برای: سنجندهی etm

تعداد نتایج: 2501  

2017
Chengwei Chen Qiujing Wang Xifeng Li Ziming Lu Jian He Qinrui Fang Xunchang Ke Chuanzhi Duan Tielin Li

[This corrects the article DOI: 10.3892/etm.2017.5043.].

2012
Fabio Victora Hecht Burkhard Stiller

The paradigm shift from centralized services into hundreds of thousands of decentralized services changes traffic directions and patterns in the Internet. In that light, overlay providers form logical communication topologies, which effect the underlying telcos’ as well as Internet Service Providers’ (ISP) traffic and network management. Thus, Economic Traffic Management (ETM) principles deal w...

2016
Lei Zhu Feizhou Huang Gang Deng Wanpin Nie Wei Huang Hongbo Xu Shaopeng Zheng Zhongjie Yi Tao Wan

[This retracts the article DOI: 10.3892/etm.2016.3824.].

2005
Qiming Qin Abduwasit Ghulam Dongdong Wang Lin Wang

High-resolution narrowband satellite data such as Enhanced Thematic Mapper Plus (ETM+) contain important information that enables us to map land surface albedos and interrelated phenomenon in high precision. In this paper, land cover of study area is classified into three classes as to surface features so that it is less expensive to eliminate the adjacency effect and to reduce the uncertainty ...

2008
S. A. Talke H. E. de Swart H. M. Schuttelaars

Motivated by field studies of the Ems estuary which show longitudinal gradients in bottom sediment concentration as high as O(0.01 kg/m), we develop an analytical model for estuarine residual circulation based on currents from salinity gradients, turbidity gradients, and freshwater discharge. Salinity is assumed to be vertically well mixed, while the vertical concentration profile is assumed to...

2001
P. M. Teillet J. L. Barker B. L. Markham R. R Irish G. Fedosejevs J. C. Storey

Early in its mission, the Landsat-7 spacecraft was temporarily placed in a ‘‘tandem’’ orbit very close to that of the Landsat-5 spacecraft in order to facilitate the establishment of sensor calibration continuity between the Landsat-7 Enhanced Thematic Mapper Plus (ETM+) and Landsat-5 Thematic Mapper (TM) sensors. The key period for the tandem configuration was June 1–4, 1999, during which hund...

2008
Ruiliang Pu Peng Gong Qian Yu

In this study, a comparative analysis of capabilities of three sensors for mapping forest crown closure (CC) and leaf area index (LAI) was conducted. The three sensors are Hyperspectral Imager (Hyperion) and Advanced Land Imager (ALI) onboard EO-1 satellite and Landsat-7 Enhanced Thematic Mapper Plus (ETM+). A total of 38 mixed coniferous forest CC and 38 LAI measurements were collected at Blod...

2001
M. S. Moran R. Bryant K. Thome W. Ni Y. Nouvellon M. P. Gonzalez-Dugo J. Qi T. R. Clarke

The recent launch of Landsat-7 ETM+ extends the uninterrupted stream of TM and ETM+ images to a potential span of 32 years. This exceptional image set will allow long-term studies of natural resources, but will require an operational method for converting image digital number (dn) to the temporally comparable surface reflectance factor (rsl). A refinement to the empirical line (EL) approach for...

2006
Ramesh Sivanpillai Charles T. Smith R. Srinivasan Michael G. Messina X. Ben Wu

We analyzed the relationship between Landsat ETM+ reflectance values and commercially managed loblolly pine (Pinus taeda L.) stand characteristics in east Texas. Multivariate regression techniques were used to predict age and tree density for all stands. A linear combination of NDVI, ETM4/ETM3 and the tasseled cap wetness index was a better predictor of stand age (R = 78%) than other combinatio...

2006
PAVEL SAKOV PETER R. OKE

This paper considers implications of different forms of the ensemble transformation in the ensemble square root filters (ESRFs) for the performance of ESRF-based data assimilation systems. It highlights the importance of using mean-preserving solutions for the ensemble transform matrix (ETM). The paper shows that an arbitrary mean-preserving ETM can be represented as a product of the symmetric ...

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