نتایج جستجو برای: fire

تعداد نتایج: 42820  

2017
Meifang Liu Jianjun Zhao Xiaoyi Guo Zhengxiang Zhang Gang Tan Jihong Yang

Grassland fire is one of the most important disturbance factors of the natural ecosystem. Climate factors influence the occurrence and development of grassland fire. An analysis of the climate conditions of fire occurrence can form the basis for a study of the temporal and spatial variability of grassland fire. The purpose of this paper is to study the effects of monthly time scale climate fact...

2004
Chris A. Childers Douglas D. Piirto

Fire management has always meant fire suppression to the managers of the chaparral covered southern California National Forests. Today, Forest Service fire management programs must be cost effective, while wilderness fire management objectives are aimed at recreating natural fire regimes. A cost-effectiveness analysis has been developed to compare fire management options for meeting these objec...

Journal: :JCP 2014
Zhengzhou Li Yuanshan Gu Lan Tang Hao Luo Gang Jin

Fire hazard monitoring and evacuation for building environments is a novel application area for the deployment of wireless sensor networks. In large place such as a marketplace, it is crucial for firefighters to know the fire hazard situation, and decide on how to best tackle the disaster. Fire sensors in the traditional fire hazard monitoring system are isolated in large place, and it results ...

2014
Ellis Q. Margolis

Piñon–juniper (PJ) fire regimes are generally characterised as infrequent high-severity. However, PJ ecosystems vary across a large geographic and bio-climatic range and little is known about one of the principal PJ functional types, PJ savannas. It is logical that (1) grass in PJ savannas could support frequent, low-severity fire and (2) exclusion of frequent fire could explain increased tree ...

2011
ELIZABETH E. HOY

A method was developed to estimate carbon consumed during wildland fires in interior Alaska based on mediumspatial scale data (60 m cell size) generated on a daily basis. Carbon consumption estimates were developed for 41 fire events in the large fire year of 2004 and 34 fire events from the small fire years of 2006–2008. Total carbon consumed during the large fire year (2.72 9 10 ha burned) wa...

1998
Steven M. Cramer Robert H. White

The worldwide movement toward performance-based building codes is prompting the need for new computational methods to predict fire endurance of wood assemblies. Progress in the past twenty years in understanding fire endurance of individual solid wood components has been achieved in many different countries. The greatest opportunity for major advance in fire research is the development of compu...

2004
Chris A. Childers Douglas D. Piirto

Fire management has always meant fire suppression to the managers of the chaparral covered southern California National Forests. Today, Forest Service fire management programs must be cost effective, while wilderness fire management objectives are aimed at recreating natural fire regimes. A cost-effectiveness analysis has been developed to compare fire management options for meeting these objec...

Journal: :IJCAT 2010
Yi Gu Jinhui Yu Ren Peng

In this paper we present an approach for synthesising and editing cartoon fire series based on hand-drawn samples. Our approach first extracts outlines of hand-drawn cartoon fire series and, based on the central reference skeleton, synthesises fire of arbitrary length by high level control on flame skeletons. With our approach users may edit cartoon fire series to achieve effects such as fire s...

2012
Bruno Moreira Juli G. Pausas

Plant species with physical seed dormancy are common in mediterranean fire-prone ecosystems. Because fire breaks seed dormancy and enhances the recruitment of many species, this trait might be considered adaptive in fire-prone environments. However, to what extent the temperature thresholds that break physical seed dormancy have been shaped by fire (i.e., for post-fire recruitment) or by summer...

1998
G.L.W. Perry

This review considers the development of some of the models and modelling approaches designed to predict the spread and spatial behaviour of wildland fire events. Such events and their accurate prediction are of great importance to those seeking to understand and manage fire-prone ecosystems. The key problem which fire modelling seeks to address is outlined. Models predicting the rate of fire s...

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