简介:高周波的地震数据部件能严重在unconsolidated在震波繁殖期间被稀释(低速度)层,导致减少的地震分辨率和signal-to-noise(S/N)比率。在这篇论文,基于维纳过滤器理论,首先,为近表面的吸收变细赔偿的反的过滤器计算被直接波浪的分析完成光谱从不同距离的部件接近表面。直接波浪被雷管产生在在洞射击上面并且被接收装置在表面上获得。空间地变化的反的过滤器被设计补偿因为3D的频率变细预先叠CRG(普通接收装置集合)数据。在把过滤器用于CRG数据以后,高频率部件被补偿,低频率维持了。地震决定和S/N比率与合成震动图更好被提高并且匹配并且更好满足地质的解释的需要。
简介:在一个季节传递火车引起的路基的颤动特征和变细结盟Daqing的冻结的区域,中国被调查。三个地实验整个一年在不同时间期间被进行,在正常,分别地,冻结并且融化时期并且季节,火车速度和火车类型的影响,在这篇论文被描述。结果显示出那:(1)垂直部件在栏杆课程附近的测量颤动的三个部件之中是最大的,并且当到铁路课程的距离增加,主导的颤动取决于季节。(2)与在正常时期的颤动相比,当侧面的颤动在结冰时期减少时,垂直、纵的颤动增加。在融化的时期,然而,垂直、纵的颤动减少,和侧面的颤动增加。(3)当火车加速增加,路基颤动增加。(4)一列货船火车导致的颤动比由一辆客车大。这些观察提供颤动和路基的动态稳定性的更好的理解并且可能在在冷区域为铁路和大楼建设开发标准有用。
简介:Assessmentofregionalforestcarbonstocksandunderlyingcontrolsiscriticalforguidingforestmanagementinthecontextofcarbonsequestration.Weinvestigatedthevariationsintreebiomasscarbonstocksrelatingtoforesttypes,andestimatedthetotaltreebiomasscarbonstocksandprojectedgainsthroughnaturalstanddevelopmentby2020and2050intheDaqingMountainNatureReservebasedonCategoryIIdataoftheForestInventoryofInnerMongoliafortheperiodending2008.Overatotalareaof388,577ha,thisnaturereservecurrentlystoresanestimated2221GgCintreeabovegroundbiomassalone,withpotentialtogrowbymorethan30%toreach2938GgCby2020andnearlydoubleto4092GgCby2050throughnaturaldevelopmentoftheexistingforeststands.Thetreebiomasscarbondensityandpotentialgainintreebiomasscarbonstocksvarymarkedlyamongforesttypesandwithstanddevelopment.Thevariationsinthepotentialchangeoftreebiomasscarbondensityfortheperiods2008–2020and2008–2050amongforesttypespartlyreflectthevaryingrelationshipsoftreebiomasscarbondensitywithstandagefordifferenttreespecies,andpartlyareattributabletovariationsinthestandagestructureamongdifferentforesttypes.Ofthemajorforesttypes,therankingofprojectedchangesintreebiomasscarbondensityarenotconsistentwithvariationsintherelationshipbetweentreebiomasscarbondensityandstandage,neitheraretheyexplainablebyvariationsinstandagestructures,implyingtheinteractiveeffectbetweenforesttypeandstanddynamicsontemporalchangesintreebiomasscarbondensity.Birchrankhighestforfuturebiomasscarbonsequestrationbecauseofitsdominanceincoverareaandbetteragestructureforpotentialgainintreebiomasscarbonstocks.Poplarandlarchwereout-performerscomparedtootherforesttypesgiventheirgreatercontributiontototaltreebiomasscarbonstocksrelativetotheirdistributionalareas.Findingsinthisstudyillustrateth
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