简介:从本质上讲,非唯一总是是我们在倒置过程面对的问题,并且它被等价的现象在地,在观察的错误、分离、有限的特征和另外的来源的影响里引起。许多作者在这块地里做了大量研究以便得到更可靠的结果,并且联合倒置是数据的不同类型被联合同时或顺序导出某些信息的繁荣的。这些研究之一是优先的信息例如地质,钻并且地震数据将被用作限制,当倒置过程能被控制时。在这篇文章,我们旨在更好获得三维的密度对比接口使用一个新方法。集成于倒置的这个优先的地震数据能在意味着在地震地点的莫霍接口的深度将被限制的过程起一个抑制作用。它能因此提供可信的结果。以便测试它的效果,这个程序在东北中国在莫霍几何学的领域examplederivation被使用。
简介:Solvingcomplexdecisionproblemsrequirestheusageofinformationfromdifferentsources.Usuallythisinformationisuncertainandstatisticalorprobabilisticmethodsareneededforitsprocessing.However,inmanycasesadecisionmakerfacesnotonlyuncertaintyofarandomnaturebutalsoimprecisioninthedescriptionofinputdatathatisratheroflinguisticnature.Therefore,thereisaneedtomergeuncertaintiesofbothtypesintoonemathematicalmodel.Inthepaperwepresentmethodologyofmerginginformationfromimpreciselyreportedstatisticaldataandimpreciselyformulatedfuzzypriorinformation.Moreover,wealsoconsiderthecaseofimpreciselydefinedlossfunctions.Theproposedmethodologymaybeconsideredastheapplicationoffuzzystatisticalmethodsforthedecisionmakinginthesystemsanalysis.
简介:Statisticalshapepriormodelisemployedtoconstructthedynamicsinprobabilisticcontourestimation.Byapplyingprincipalcomponentanalysis,plausibleshapesamplesareefficientlygeneratedtopredictcontoursamples.Basedontheshape-dependentdynamicsandprobabilisticimagemodel,aparticlefilterisusedtoestimatethecontourwithaspecificshape.Comparedwiththedeterministicapproachwithshapeinformation,theproposedmethodissimpleyetmoreeffectiveinextractingcontoursfromimageswithshapevariationsandocclusion.
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简介:在3D抵抗力倒置最小化答案的数字,在倒置的一个固有的问题,考虑的数据的数量不得不大,优先的限制需要被使用。关于一个地质的异例的程度的地质、地球物理的数据是重要优先的信息。我们在3D建议形状限制的使用电的抵抗力倒置。三加权的直角的向量(正常和二正切向量)被用来在异例的边界控制抵抗力差别。异例的边界上的异例和限制的空间形状因此被建立。我们在3D抵抗力倒置的客观功能合并了空间形状限制并且与空间形状限制构造了3D抵抗力倒置方程。随后,我们使用了抑制方向向量和3D抵抗力倒置的重量的基于优先的空间形状数据的数字建模。我们建立了在方向向量和重量之间的一个合理范围,并且验证了使用空间形状的可行性和有效性在减少过多的结构和答案的数字的优先的限制。我们使用了优先的空间地抑制形状的倒置方法在广州地铁定位含水土层。空间形状限制从渗透雷达数据的地面被拿。含水土层的地点和形状的倒置结果与钻倒置的数据,和数字同意解决方案显著地被减少很好。
简介:IonosphereicfoF2variationsareverysensitivetotheseismiceffectandresultsofionosphericperturbationsassociatedwithearthquakesseemtoveryhopefulforshort-termearthquakeprediction.OnJanuary18,2011at20:23UTagreatearthquake(M=7.2)occurredinDalbandin(28.73°N,63.92°E),Pakistan.Inthisstudy,wehavetriedtofindoutthefeaturesofpre-earthquakeionosphericanomaliesbyusingthehourlydaytime(08.00a.m.-05.00p.m.)dataofcriticalfrequency(foF2)obtainedbythreeverticalsoundingstationsinstalledinIslamabad(33.78°N,73.06°E),Multan(32.26°N,71.51°E)andKarachi(24.89°N,67.02°E),Pakistan.TheresultsshowthesignificantanomaliesoffoF2intheearthquakepreparationzoneseveraldayspriortotheDalbandinearthquake.ItisalsoobservedthattheamplitudeandfrequencyoffoF2anomaliesaremoreprominentattheneareststationtotheepicenterascomparedtothosestationsneartheoutermarginoftheearthquakepreparationzone.TheconfidencelevelforionosphericanomaliesregardingtheseismicsignaturescanbeenhancedbyaddingtheanalysisofsomeotherionospheicparametersalongwithcriticalfrequencyofthelayerF2.
简介:AnimprovedmethodhasbeendevelopedforenrichinganddeterminingtraceIn,Pt,Sn,Co,Hg,Pb,Ni,Bi,Pd,CuandAginhigh-puritygallium.SamplewastreatedbyPDM(partialdissolutionofmatrix)withHCl(11mol/L)-HNO3(0.5mol/L)toasmallresidueofwhichGawasthenremovedbyextractionwith1mlisopropylether.TheconcentratedimpuritiesweredeterminedbyAESprocedure.Therecoveriesfortheele-mentsattherangeof0.02~0.2μgare95~103%;therelativestandarddeviationsfordeterminedimpuritiesoverarangeofn.10-7~n·10-8%are4.3~12%;thedetectionlimitofmostelementscanreachn·10-7~n·10-8%levelwiththeexceptionofHgandPt.Thismethodhasbeensuccessfullyusedtoanalyzemanysam-plessentbyfactoriesandinstitutes.
简介:Thegrowingcorrelationlengthpriortothemoderate-greatearthquakesoccurredinGansuProvinceanditsnearbyareasince1986hasbeenstudiedusingthemethodofsingle-linkclusteranalysis(SLC).Accordingtodifferentconditionsinthesourcearea,thecircularspatialwindowcenteredintheepicenterandtheparallelgrammicspatialwindowalongthefaultbelthavebeenselected.Theresultsshowthatthephenomenaofgrowingcorrelationlengthhavebeenobservedbeforetheearthquakesstudiedinthepaper.
简介:Bystudyingthetraditionalspectralreflectancereconstructionmethod,spectralreflectanceandtherelativespectralpowerdistributionofalightingsourcearesparselydecomposed,andtheorthogonalpropertyoftheprincipalcomponentorthogonalbasisisusedtoeliminatebasis;thenspectralreflectancedataareobtainedbysolvingasparsecoefficient.Aftertheoreticalanalysis,thespectralreflectancereconstructionbasedonsparsepriorknowledgeoftheprincipalcomponentorthogonalbasisbyasingle-pixeldetectoriscarriedoutbysoftwaresimulationandexperiment.Itcanreducethecomplexityandcostofthesystem,andhascertainsignificancefortheimprovementofmultispectralimageacquisitiontechnology.
简介:Cauchypriori基于分发的贝叶斯的AVO反射率倒置可以导致对大反射率敏感的稀少的估计。为倒置,协变性矩阵和调整条款的计算要求模型参数的优先的评价,它使反复的倒置弱非线性。同时,在模型参数之中的关系被假定线性。而且,反射率,倒置的结果,或有集成反射率恢复的累积错误的有弹性的参数很好不适合检测烃和液体。在贝叶斯的线性AVO倒置,相反,有弹性的参数能直接从prestack被提取没有为模型参数的线性假设的地震数据。就上述的方法的优点而言,贝叶斯的AVO反射率倒置过程被修改,当优先的概率分布和时间变体协变性也被考虑,Cauchy分发被探索。最后,我们为弱非线性的AVO波形倒置建议一个新方法。而且,线性假设被放弃,有弹性的参数例如P波浪速度,S波浪速度,和密度,能直接特别为大反射率的接口从地震数据被恢复。数字分析证明所有有弹性的参数能从prestack被估计地震数据甚至当地震数据的signal-to-noise比率是低的时。
简介:Beforeastrongearthquake,thereisoftenaprocessofquiescenceor2absence2ofregionalseismicactivity,whichisaphenomenonthathasattractedtheattentionofmanyscholarsinChinaandothercountries(LU,etal,1985;Wesson,1973).Inthepastten-oddyears,someChineseseismologistsmade,earlierorlater,specialstudiesonthequiescenceanomalyofseismicityinsomespecifiedareasfromdifferentangles.TakingtheconvertedannualfrequencyofM=5.0earthquakesinNorthChinaregionasacharacteristicquantity,JIANGandFENG(1989)analyzedthequiescenceanomalyofseismicactivitybyfuzzyrecognition.
简介:Theabilitytomodulatethefutureliverremnant(FLR)isakeycomponentofmodernoncologichepatobiliarysurgerypracticeandhasextendedsurgicalcandidacyforpatientswhomayhavebeenpreviouslythoughtunabletosurviveliverresection.MultipletechniqueshavebeendevelopedtoaugmenttheFLRincludingportalveinembolization(PVE),associatingliverpartitionandportalveinligation(ALPPS),andtherecentlyreportedtranshepaticlivervenousdeprivation(LVD).PVEisawell-establishedmeanstoimprovethesafetyofliverresectionbyredirectingbloodflowtotheFLRinanefforttoselectivelyhypertrophyandultimatelyimprovefunctionalreserveoftheFLR.ThisarticlediscussesthecurrentpracticeofPVEwithfocusonsummarizingthelargenumberofpublishedreportsfromwhichoutcomesbasedpracticeshavebeendeveloped.BothtechnicalaspectsofPVEincludingvolumetry,approaches,andembolizationagents;andclinicalaspectsofPVEincludingdatasupportingindications,anditsroleinconjunctionwithchemotherapyandtransarterialembolizationwillbehighlighted.PVEremainsanimportantaspectofoncologiccare;inlargepartduetothesubstantialfoundationofinformationavailabledemonstratingitsclearclinicalbenefitforhepaticresectioncandidateswithsmallanticipatedFLRs.
简介:AbstractObjective:This study aimed to determine: (1) whether recurrent deliveries of a small for gestational age (SGA) neonate are associated with increased obstetrical or neonatal complications; (2) whether the risk factors that can predict small for gestational age (SGA) recurrence.Methods:This study was based on Soroka Medical Center' s Obstetrics electronic database. The database consisted of 109 022 women who had 320 932 deliveries between the year 1988-2014.The study cohort included 6.8% (7 368/109 022) of these patients who gave birth to a singleton SGA neonate on their first delivery and had more than one delivery. The study population was divided into two groups according to the outcome of the subsequent delivery: (1) women with sporadic SGA who delivered a non-SGA neonate (n= 5 416); (2) women with recurrent SGA (n = 1 952). SGA defined as birthweight <10th percentile. Maternal and neonatal complications were compared between the two groups. Logistic regression was used to determine independent risk factors for SGA recurrence.Results:The prevalence of birthweight <5th percentile was higher among the recurrent SGA group in the first delivery (P < 0.001). Bedouin ethnicity was more prevalent in the recurrent SGA group (P < 0.001). The rate of preterm delivery was higher in the first delivery of the recurrent SGA group (P = 0.015). The sporadic SGA group had a higher rate of perinatal mortality during the first pregnancy (P= 0.017). The rate of severe hypertension (P= 0.005), polyhydramnios, meconium-stained amniotic fluid, nonreassuring fetal heart rate and total perinatal mortality (P < 0.001) were higher in the second delivery of the recurrent SGA group. In a logistic regression model, preterm delivery and birthweight <5th percentile at the first delivery was found to be independent risk factors for recurrence of an SGA neonate in the subsequent birth (relative risks:1.530, confidence interval: 1.249-1.875; relative risks:1.826, confidence interval: 1.641-2.030, respectively).Conclusion:Women with recurrent SGA neonates have specific clinical characteristics. Among women who deliver an SGA neonate, preterm delivery, and birthweight <5th percentile are independent predictors for its recurrence.
简介:AbstractBackground:Chemotherapy plus granulocyte colony-stimulating factor (GCSF) regimen is one of the available approaches to mobilize peripheral blood progenitor cells (PBPCs). It causes thrombocytopenia and delays leukapheresis. This study aimed to evaluate the role of recombinant human thrombopoietin (rhTPO) before mobilization chemotherapy in facilitating leukapheresis in patients with lymphoma.Methods:In this randomized open-label phase 2 trial, patients were randomly assigned in a 1:2 ratio to receive mobilization with rhTPO plus GCSF in combination with chemotherapy (the rhTPO plus GCSF arm) or GCSF alone in combination with chemotherapy (the GCSF alone arm). The recovery of neutrophils and platelets and the amount of platelet transfusion were monitored.Results:Thirty patients were enrolled in this study between March 2016 and August 2018. Patients in the rhTPO plus GCSF arm (n = 10) had similar platelet nadir after mobilization chemotherapy (P=0.878) and similar amount of platelet transfusion (median 0 vs. 1 unit, P=0.735) when compared with the GCSF alone arm (n = 20). On the day of leukapheresis, the median platelet count was 86 × 109/L (range 18-219) among patients who received rhTPO and 73 × 109/L (range 42-197) among those who received GCSF alone (P=0.982). After the use of rhTPO, the incidence of platelet count <75 × 109/L on the day of leukapheresis did not decrease significantly (30.0% vs. 50.0%, P=0.297). Platelet recovery after PBPC transfusion was more rapid in the rhTPO plus GCSF arm (median 8.0 days [95% confidence interval 2.9-13.1] to platelets ≥50 × 109/L vs. 11.0 days [95% confidence interval 8.6-13.4], P=0.011). The estimated total cost of the mobilization and reconstitution phases per patient was similar between the two treatmtent groups (P=0.362 and P=0.067, respectively).Conclusions:Our findings indicate that there was no significant clinical benefit of rhTPO use in facilitating mobilization of progenitor cells, but it may promote platelet recovery in the reconstitution phase after high-dose therapy.Trial registration:This trial has been registered in Clinicaltrials.gov as NCT03014102.