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声强向量阵的波束形成与检测原理研究 被引量:2
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作者 陈韶华 相敬林 +1 位作者 梁峰 石杰 《西北工业大学学报》 EI CAS CSCD 北大核心 2007年第2期301-305,共5页
提出了基于声强向量阵的信号检测方法,分析了基于声压的常规与最优(超增益)波束形成的阵增益与指向性。基于互谱声强测量方法分析了声强向量阵在各向同性噪声中对声信号的检测与定向原理,得出了它相对于声压检测的时空增益。理论分析、... 提出了基于声强向量阵的信号检测方法,分析了基于声压的常规与最优(超增益)波束形成的阵增益与指向性。基于互谱声强测量方法分析了声强向量阵在各向同性噪声中对声信号的检测与定向原理,得出了它相对于声压检测的时空增益。理论分析、计算机仿真和实验均表明了超增益波束形成与声强检测方法的有效性,且声强检测方法的运算量小,性能更为稳健。 展开更多
关键词 信号检测 声强向量阵 超增益波束形成
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Combined forest and soil management after a catastrophic event
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作者 Augusto ZANELLA Jean-Francois PONGE +20 位作者 Anna ANDREETTA Michael AUBERT Nicolas BERNIER Eleonora BONIFACIO Karine BONNEVAL Cristian BOLZONELLA Oleg CHERTOV Edoardo A.C.COSTANTINI Maria DE NOBILI Silvia FUSARO Raffaello GIANNINI Pascal JUNOD Klaus KATZENSTEINER Jolantha KWIATKOWSK-MALINA Roberto MENARDI Lingzi MO Safwan MOHAMMAD Annik SCHNITZLER Adriano SOFO Dylan TATTI Herbert HAGER 《Journal of Mountain Science》 SCIE CSCD 2020年第10期2459-2484,共26页
At the end of October 2018,a storm of unprecedented strength severely damaged the forests of the eastern sector of the Italian Alps.The affected forest area covers 42,500 ha.The president of one of the damaged regions... At the end of October 2018,a storm of unprecedented strength severely damaged the forests of the eastern sector of the Italian Alps.The affected forest area covers 42,500 ha.The president of one of the damaged regions asked for help from the University of Padua.After eight months of discussion,the authors of this article wrote a consensus text.The sometimes asper debate brought to light some crucial aspects:1)even experienced specialists may have various opinions based on scientific knowledge that lead to conflicting proposals for action.For some of them there is evidence that to restore a destroyed natural environment it is more judicious to do nothing;2)the soil corresponds to a living structure and every ecosystem’s management should be based on it;3)faced with a catastrophe,people and politicians find themselves unarmed,also because they rarely have the scientific background to understand natural processes.Yet politicians are the only persons who make the key decisions that drive the economy in play and therefore determine the near future of our planet.This article is an attempt to respond directly to the governor of a region who formally and prudently asked a university department called"Land,Environment,Agriculture and Forestry"for help before taking decisions;4)the authors also propose an artistic interpretation of facts(uncontrolled storm)and conclusions(listen to the soil).Briefly,the authors identify the soil as an indispensable source for the renewal of the destroyed forest,give indications on how to prepare a map of the soils of the damaged region,and suggest to anchor on this soil map a series of silvicultural and soil management actions that will promote the soil conservation and the faster recovery of the natural dynamic stability and resilience. 展开更多
关键词 vaia storm Wind damages Soil organic carbon Soil functioning Humus form Climate change
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