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简介：Qinghai-Xizang高原，或西藏的高原，是为气候变化的一个敏感区域，在全球温暖的表明是特别地显著的的地方。在这个区域的宽气候可变性显著地影响本地陆地生态系统并且能因而导致著名植被变化。在这篇论文，内部高原植被的年变化用一个21年的规范的差别植被指数(NDVI)被调查确定的数据集为地区性的生态系统和它的相互作用温暖的气候的后果。结果证明那篇植被报道在东方、南部的高原区域是最好的并且向西方和北方败坏。总体上，植被活动在1982-2002期间以一种摆动的方式表明渐渐的改进。时间的变化也展出惹人注目的地区性的差别：一个增加的趋势在西方，南方，北方和东南是很明显的，而一个减少的趋势沿着南部的高原边界并且在中央东方的区域是在场的。在NDVI和地面温度之间的协变性分析建议那个植被变化是仔细与气候有关变化。然而，控制物理过程地理上变化。在西方和东方，植被可变性被发现被温度主要驱使，与具有第二等的重要性的降水的影响。然而，在中央高原，温度和降水因素在modulating是同等地重要的内部年度植被可变性。

简介：我们报导在与公司2激光制作的熊猫纤维摇长时期栅栏(PR-LPGs)的期刊。PR-LPGs很高完成与12个时期和3.5湩愠汬慩据?楷桴联合19dB的效率？

简介：all-k-nearest-neighbor(AkNN)询问为每个询问对象发现k最近的邻居。这个问题在许多区域自然地产生，例如GIS(地理信息系统)，多媒体检索，和recommender系统。到各种各样的数据类型和灵活距离度量标准在真实应用程序包含了的支持，也就是，我们在公制的空格学习AkNN检索公制的AkNN(MAkNN)搜索。认为询问上的内在的索引设定，目标集合不能存在，它在许多情形是自然的。例如，询问集合和对象集合能是另外的询问的结果，并且这样，内在的索引不能预先被造。到没有任何内在的索引的数据集上的支持MAkNN搜索，我们建议一个有效基于磁盘的算法，作为基于分区的MAkNN算法(PMA)称为，它跟随一个分区搜索框架并且为加速搜索采用一系列修剪的规则。另外，我们扩大我们的技术处理MAkNN询问的有趣的变体，即，公制的self-AkNN(MSAkNN)搜索，在询问集合与对象相同的地方，设定。用真实、合成的数据集的广泛的实验表明我们的修剪的规则的有效性和建议算法的效率，与最先进的MAkNN和MSAkNN算法相比。

简介：TwoclonaltrialstandsofChineseFir（Cunninghamialanceolata）wereusedinthisstudy,onewas19-year-oldstandwhichincluded38clones,andtheotherwas17-year-oldstandincluding102clones.Thestatisticalanalysesshowedthattherewereverysignificantgeneticvariationsinheight,DBH,volumeandratioofheartwood(Rhw),woodbasicdensity（ρb）oftheclonesinthetwostands.Therepeatabilityofcloneswasinmediantohighlevel,andthegeneticCVwasdifferentovertheallfivetraits.Therewereverysignificantphenotypicandgeneticcorrelationsamongheight,DBHandvolume,andnegativecorrelationsamonggrowth,Rhwandρb.Theselectionmethodexperimentindicatedthatindexselectioncouldimprovevolume,Rhwandρb,showingsyntheticallysuperiorselectioneffectscomparedtoanyindividualtraitselectionmethods.

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简介：InordertodeterminetherelativeagingstatusofupwelledorverticallymixedwaterinthenorthernTaiwanStrait,arecentlydevelopedmethodofcalcularingthedegreeofnutrientconsumption(DNC)wasemployed.Upwellingwasdetectedatawaterdepthofabout75minsummer.Bottomwatersintheaphoriczoneandnewly-upwelledwatersintheeuphoriczonewerefoundtobelowintermsoftheirDNC.Ingeneral,alowDNCwasnotedalongsidetheothertraditionalupwellingindicators,suchaslowertemperatureanddegreeofoxygensaturation,buthighersalinity,apparentoxygenutilization,nutrientcontentsandchlorophyll-a.Enhancedverticalmixing,butwithoutanapparentupwellingsignal,wasdetectednearthesamelocationinwinter.

简介：一个有效压缩方法被基于与在完全上的Gabor字典匹配追求(MP)算法编码原子的顺序索引建议，它有优点与低失真根据实际请求调整压缩比率(CR)。减少计算复杂性也与基因算法(GA)被相结合。然后，这个方法的有效性被在electrocardiography(ECG)的压缩使用它验证，Electroencephalography(EEG)发信号。模拟结果证明CR能分别地在ECG和EEG信号上与1.06%和2.15%仅仅重建错误在18:1被完成。它与传统的方法，和噪音抑制效果的相比有更高的CR和更少重建错误也被介绍。

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简介：Journalevaluationisacompliatedengineeringsystem,howtoevaluateacademicjournalsmorescientificallyinscientificmethodshavebecomesaproblemofgreatconcerns.Thispaperpresentsattributemathematicalmodelforcomprehensiveindexsystem'qualityevaluationfornaturalscienceacademicjournals,aimingtomakecomprehensiveindexsystem'qualityevaluationforacademicjournalsmoreobjectiveandreasonablecomparedwithotherquantitativeevaluationways.

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简介：Theestimationofglycemicindex(GI)ofrice-basedmixedmealeitherbyusingpredictedGI(GIpred)oradjustedGI(GIadj)formulaisunclear.ThisstudyaimedtodeterminetheglycemicresponseofriceinricealoneormixedmealsandtoidentifytheappropriateformulaforestimatingtheGIofrice-basedmixedmeals.Theglycemicresponsesproducedbythericealone(redrice,fragrantwhitericeorparboiledrice)andtherice-basedmixedmeals(friedredrice,friedfragrantwhitericeorfriedparboiledrice)whichprovided25gavailablecarbohydratewereassessedin11healthyindividuals.TodeterminethemeasuredGI(GImeasured)ofricealoneandrice-basedmixedmeals,participantsunderwentthreerepeatedtestsofareferencefood(Glucolin?).Testswereperformedinrandomorderonnineseparatevisitsafteranovernightfastingforatleast8h.Capillaryglucoseatbaseline(0min),15,30,45,60,90and120minfromstartingthemealswasassessedandusedtodeterminetheincrementalareaunderthecurve(iAUC120).TheagreementbetweenGImeasuredandtheestimationformulae(GIpredorGIadj)weredeterminedusingBland-Altmananalysis.TheiAUC120afterconsumingricealonewassignificantlyhigherthantherice-basedmixedmealsexceptforfriedfragrantrice,whichwascomparabletothericealone(P>0.05).TheGImeasuredvaluesofricewerecategorizedasmedium(61forparboiledrice,67forfragrantwhiterice,and68forredrice).GIpred(r=0.40,P<0.01)andGIadj(r=0.41,P<0.01)weresignificantlycorrelatedwithiAUC120.TheagreementbetweenGImeasuredandGIadjisapparentsuggestingtheusefulnessofGIadjinestimatingmealGIofrice-basedmixedmeals.

简介：Assessmentofsoilqualityisimportantforoptimumproductionandnaturalresourcesconservation.AgriculturalandpasturesoilqualitiesofDeh-SorkhregionlocatedatsouthofMashhad,northeasternIranwereassessedusingtheintegratedqualityindex(IQI)andNemeroqualityindex(NQI)modelsincombinationwithtwodatasets,i.e.,totaldataset(TDS)andminimumdataset(MDS).Inthisstudy6soilpropertiesconsideredasMDSwereselectedoutof18propertiesasTDSusingprinciplecomponentanalysis.Soilsamplesweredividedinto3groupsbasedonoptimumrangesof8soilphysicalqualityindicators.Soilsampleswiththemostindicatorsatoptimumrangewereselectedasgroup1andthesampleshavingfewerindicatorsatoptimumrangewerelocatedingroups2and3.Optimumrangesofsoilporesizedistributionfunctionswerealsodeterminedassoilphysicalqualityindicesbasedon8soilphysicalqualityindicators.Poresizedistributioncurvesofgroup1wereconsideredastheoptimumporesizefunctions.Theresultsshowedthatrelativelyhighorganiccarboncontentscouldimproveporesizedistribution.Meancomparisonsofsoilphysicalqualityindicatorsdemonstratedthatmeanweightdiameterofwetaggregates,structuralstabilityindex,theslopeofmoistureretentioncurveatinflectionpoint,andplantavailablewatercontentinagriculturallandusedecreasedsignificantlyinrelationtopasturelanduse.Inaddition,theresultsdemonstratedthatthestudiedMDScouldbeasuitablerepresentativeofTDS.78%ofpasturesoilshadtheoptimumporesizedistributionfunctions,whilethisparameterforagriculturalsoilswasonly13%.Ingeneral,thesoilsofthestudiedregionshowedhighlimitationsforplantgrowthaccordingtothestudiedindicators.

简介：时间间隔经常与元组被联系在时间的关系代表他们的有效时间，在的地方重叠加入为询问的各种各样的类型是关键的。许多存在重叠基于象空铅树，B+-tree和间隔树那样的树结构加入算法使用索引。自从深路径遍历是不可避免的，这些算法通常不象数据分区或飞机打扫基于算法一样让高中央处理器花费，它使他们竞争。这份报纸建议有效重叠基于作为重叠间隔称为转换索引的一个新二层的扁平的索引加入算法(即，O2i索引)。记录间隔的结束点使用一个数组并且接近经由在第一层的二功能的间隔的嵌套的结构，和第二层使用转换了跟踪所有间隔的表令人满意接近的嵌套的结构。在新索引的帮助下，join算法仅仅访问must-be-scanned表并且跳过所有其它。真实、合成的数据集上的分析和实验证明建议算法象最先进的算法一样竞争。

简介：AbstractBackground:Vasovagal syncope (VVS) greatly impairs quality of life. The therapeutic efficacy of oral rehydration saline (ORS) for unselected VVS patients is not satisfactory due to the diverse mechanisms of the disease. Body mass index (BMI) was demonstrated to reflect blood volume to a certain extent. Therefore, the present study explored the capability of BMI to predict the therapeutic response of children with VVS to ORS treatment.Methods:Seventy-four children with VVS who visited the Syncope Unit of Pediatrics at Peking University First Hospital from November 2010 to June 2019 receiving ORS treatment were enrolled for this retrospective case-control study. A comparison of demographic, clinical, and hemodynamic characteristics was performed between responders and non-responders. The correlation between baseline BMI and response time was analyzed. To determine the value of baseline BMI in predicting the therapeutic efficacy of ORS in children with VVS, a receiver operating characteristic curve analysis was performed.Results:Fifty-two children were identified as responders, and the remaining 22 children were identified as non-responders. The baseline BMI of the responders was much lower than that of the non-responders (16.4 [15.5, 17.8] kg/m2vs. 20.7 ± 3.6 kg/m2, P < 0.001), and baseline BMI was positively correlated with response time in the head-up tilt test after adjusting for sex (r = 0.256, 95% confidence interval [CI]: 0.067-0.439, P = 0.029). The area under the receiver operating characteristic curve of baseline BMI was 0.818 (95% CI: 0.704-0.932, P < 0.001), and an optimal cut-off value of 18.9 kg/m2 yielded a sensitivity of 83% and a specificity of 73% to predict the efficacy of ORS in VVS.Conclusion:Prior to treatment, baseline BMI is a promising predictor of response to ORS in children with VVS.

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简介：Magneticlocalizedsurfaceplasmonmodesaresupportedonmetallicspiralstructures.Couplingmechanismsforthesemetamaterialresonators,whicharethejointactionofmagneticandelectriccoupling,arestudied.Basedonthestrongcoupling,spoofmagneticplasmonmodespropagatinginthebackwarddirectionareproposedalongachainofsubwavelengthresonators.Thetheoreticalanalysis,numericalsimulations,andexperimentsareingoodagreement.Theproposednovelrouteforachievingnegative-indexwaveguidinghaspotentialapplicationsinintegrateddevicesandcircuits.

简介：为非常规的系统的基于表演的反复的学习控制(ILC)的缺乏详细被调查，然后，更新的更快的控制输入和上升技术在性能的设计被介绍为部分非常规的系统索引基于的ILC。基于不同性能，索引被考虑的二种最佳的ILC。最后，模拟例子被给说明建议学习控制的可行性。