Tools
Sorted by:
Try your query at:
 |
 |
 |
 |
 |
 |
Results 1 - 10
of
4,984
Representing twentieth century space-time climate variability, part 1: development of a 1961-90 mean monthly terrestrial climatology
- Journal of Climate
, 1999
"... The construction of a 0.58 lat 3 0.58 long surface climatology of global land areas, excluding Antarctica, is described. The climatology represents the period 1961–90 and comprises a suite of nine variables: precipitation, wet-day frequency, mean temperature, diurnal temperature range, vapor pressur ..."
Abstract
-
Cited by 581 (13 self)
- Add to MetaCart
pressure, sunshine, cloud cover, ground frost frequency, and wind speed. The climate surfaces have been constructed from a new dataset of station 1961–90 climatological normals, numbering between 19 800 (precipitation) and 3615 (wind speed). The station data were interpolated as a function of latitude
Status of land cover classification accuracy assessment
- REMOTE SENSING OF ENVIRONMENT
, 2002
"... The production of thematic maps, such as those depicting land cover, using an image classification is one of the most common applications of remote sensing. Considerable research has been directed at the various components of the mapping process, including the assessment of accuracy. This paper brie ..."
Abstract
-
Cited by 266 (3 self)
- Add to MetaCart
The production of thematic maps, such as those depicting land cover, using an image classification is one of the most common applications of remote sensing. Considerable research has been directed at the various components of the mapping process, including the assessment of accuracy. This paper
A Tight Analysis of the Greedy Algorithm for Set Cover
, 1995
"... We establish significantly improved bounds on the performance of the greedy algorithm for approximating set cover. In particular, we provide the first substantial improvement of the 20 year old classical harmonic upper bound, H(m), of Johnson, Lovasz, and Chv'atal, by showing that the performan ..."
Abstract
-
Cited by 122 (0 self)
- Add to MetaCart
We establish significantly improved bounds on the performance of the greedy algorithm for approximating set cover. In particular, we provide the first substantial improvement of the 20 year old classical harmonic upper bound, H(m), of Johnson, Lovasz, and Chv'atal, by showing
Covered
, 1978
"... 16. Abstracts The Nevin wetland is an area of ground-water discharge. Ground water enters the wetland as springflow and as leakage upward through the organic wetland soils. The average annual water budget was "based on the 3 years 197 ^ through 1976. Inflow was composed of direct precipitation ..."
Abstract
- Add to MetaCart
16. Abstracts The Nevin wetland is an area of ground-water discharge. Ground water enters the wetland as springflow and as leakage upward through the organic wetland soils. The average annual water budget was "based on the 3 years 197 ^ through 1976. Inflow was composed of direct precipitation
Covered
, 1974
"... 16. Abstracts ^ digital water-quality model of the shallow alluvial aquifer near Barstow was evaluated to determine the applicability of the model computer program to varied hydrologic problems. The evaluation was made on the basis of the data requirements of the model, the characteristics and limit ..."
Abstract
- Add to MetaCart
the cause and effect relations associated with ground-water pollution. 17. Key Words and Document Analysis. 17a. Descriptors.' *Model studies, *Ground water, *Feasibility studies, *Chemical degradation,
Global distribution of total cloud cover and cloud type amounts over the ocean
- NCAR Technical Notes TN317+STR
, 1988
"... 1Preface Tal of ConTable of Con1tents This is the third of a series of atlases to result from a study of the global cloud climatology from ground-based observations. The first two atlases (NCAR/TN-201+STR and NCAR/TN-241+STR) described the frequency of occurrence of each cloud type and the co-occurr ..."
Abstract
-
Cited by 114 (6 self)
- Add to MetaCart
1Preface Tal of ConTable of Con1tents This is the third of a series of atlases to result from a study of the global cloud climatology from ground-based observations. The first two atlases (NCAR/TN-201+STR and NCAR/TN-241+STR) described the frequency of occurrence of each cloud type and the co
Improving wireless sensor network lifetime through power aware organization
- ACM Wireless Networks
, 2005
"... Abstract. A critical aspect of applications with wireless sensor networks is network lifetime. Battery-powered sensors are usable as long as they can communicate captured data to a processing node. Sensing and communications consume energy, therefore judicious power management and scheduling can eff ..."
Abstract
-
Cited by 154 (8 self)
- Add to MetaCart
effectively extend operational time. To monitor a set of targets with known locations when ground access in the monitored area is prohibited, one solution is to deploy the sensors remotely, from an aircraft. The loss of precise sensor placement would then be compensated by a large sensor population density
Energy-efficient target coverage in wireless sensor networks
- in IEEE Infocom
, 2005
"... Abstract — A critical aspect of applications with wireless sensor networks is network lifetime. Power-constrained wireless sensor networks are usable as long as they can communicate sensed data to a processing node. Sensing and communications consume energy, therefore judicious power management and ..."
Abstract
-
Cited by 153 (3 self)
- Add to MetaCart
and sensor scheduling can effectively extend network lifetime. To cover a set of targets with known locations when ground access in the remote area is prohibited, one solution is to deploy the sensors remotely, from an aircraft. The lack of precise sensor placement is compensated by a large sensor population
Results 1 - 10
of
4,984
