简介：Ignitionmodelsoftestedmaterialhaveimportantsignificancetofireprevention.Inordertoknowheattransferofthermalthinmaterialinfiredisaster,startingfromthelawofconservationofenergy,simplifyingheatcapacityintoaconstantaccordingtoDulong-Petitlaw,andthreecalculationformulasofignitiontimeofthermalthinmaterialinaconstantheatfluxwererespectivelyobtainedundertheconditionsofignoringheatloss,linearprocessingheatlossandconsideringthermalradiation.Therelationbetweentheignitiontimeandthethermalcurrentintensitywasdiscussed.

简介：土壤的理解在野火或控制灼伤以后的热电导率是重要的打管理和火以后的恢复努力。尽管玷污热电导率很好被学习了因为非火加热了土壤，全面数据评估在土壤上的从火的极端加热的长期的效果热电导率被限制。这研究的目的是由直接比较在土壤的有效热传导性上评估火的长期的影响加热火的，没有火控制通过一系列实验室研究玷污。热传导性在Manitou试验性的福雷斯特，以内从二个地点为十件土壤样品被测量科罗拉多，美国，为到浸透的剩余度的从浸透的水内容的一个范围。测量的热传导性与用文学用三个实验模型做的独立估计相比，包括坎贝尔等。(1994)，C?t???????$

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简介：稀罕、危及的种类Ammopiptanthusmongolicus(格言)的人口Chengf。在瓷器干旱区域和中亚很快衰退了。有迫切需要保护这种，它在在整个西北的中国的干旱区域维持生物多样性是特别地重要的。由基于植物蒸发转移系数分析红外线的热图象(h在)和光合的参数，我们成为量、精确植物生长和A的健康地位诊断。mongolicus。用一个LI-COR6400光合作用系统，我们测量了网络光合的率(Pn),有气孔的传导力(Gs),和蒸发率(Tr)。在这域里获得的红外线的热图象被ENVI4.8软件处理计算植物题目的表面温度。我们发现植物蒸发转移A的系数。mongolicus在旧植物的顺序>幼苗>中间的植物。年轻、中间、旧的植物的衰退健康层次被划分成三个范畴：<0.4，0.40.7，并且>0.7。系数与Tr,Gs,和P显示他们能同时反映植物生长的状态的n,。由建立h在在回归模型Y的和光合的参数?=?a-blnx，我们能精确地诊断植物生长和植物健康条件的衰落。

简介：FieldexperimentswereconductedintheEbroDeltaarea(Spain),from2007to2009withtworicevarieties:GlevaandTebre.Theexperimentaltreatmentsincludedaseriesofseedrates,twodifferentwatermanagementsystemsandtwodifferentnitrogenfertilizationtimes.Thenumberofleavesonthemainstemsandtheiremergencetimewereperiodicallytagged.Theresultsindicatedthatthefinalleafnumberonthemainstemsinthetworicevarietieswasquitestableoverathree-yearperioddespiteofthedifferencesintheirrespectivegrowthcycles.Interactionbetweennitrogenfertilizationandwatermanagementinfluencedthefinalleafnumberonthemainstems.Plantdensityalsohadasignificantinfluenceontherateofleafappearancebyextendingthephyllochronandpostponingtheonsetofintraspecificcompetitionaftertheemergenceofthe7thleafonthemainstems.Finalleafnumberonthemainstemswasnegativelyrelatedtoplantdensity.Arelationshipbetweenleafappearanceandthermaltimewasestablishedwithastrongnonlinearfunction.Indirect-seededrice,thelengthofthephyllochronincreasesexponentiallyinlinewiththeadvanceofplantdevelopment.Ageneralmodel,derivedfrom2-yearexperimentaldata,wasdevelopedandsatisfactorilyvalidated;ithadarootmeansquareerrorof0.3leaf.Anexponentialmodelcanbeusedtopredictleafemergenceindirect-seededrice.