简介：摘要：通过分析供水管网水质及存在的问题，提出了一些提高管网管理水平的方法和建议，以达到促进供水服务水平全面提升、保证水行业的健康发展目的。

简介：在遥远地察觉到的形象的监督分类进程，样品的数量是象过去常评估图象分类的钥匙一样影响图象分类的精确性的重要因素之一。一般来说，样品根据优先的知识，经验和更高的分辨率图象被获得。与样品和一样的采样模型的一样的尺寸，训练样本数据的几个集合能被获得。在这，集合，集合反映它完善光谱特征并且保证仅仅在分类的精确性被估计了以后，分类的精确性能被知道。在分类前，为指导并且优化作为结果的分类过程测量并且估计样品的质量将因此是有意义的研究。基于不平的集合，然后，为样品质量的一个新测量索引被建议。实验数据在1999年8月8日是中国黄河三角洲的陆地卫星TM形象。实验比较Bhattacharrya距离矩阵和纯净索引Δ和ΔX在样品质量上基于5样品数据并且也的不平的集合理论分析它的效果。

简介：为了在表面上调查都市化和工业化的影响，浇质量，Panzhihua的一个预研项目()采矿镇被执行。Panzhihua区域的都市化被工业开发和人口生长统治。都市化的水平证明它在1965是18.44%，并且在1983到达了45.99%。然后，它在2005到达了53.71%，因此都市化过程在Panzhihua区域是很快速的。在工业化的过程，工业化的水平从1965～2005在约70%点被波动，它被采矿影响，提取，并且熔炼生产。在都市化，在生活污染来源引起增加的人口生长，和自河的数量的过程，适用的大肠菌，货到付款(化学的氧需求)，NH4+-N，和BOD5(五天的生物的氧需求)被释放进Jinsha()河，它能在表面水质量引起衰落。当时在工业化(特别工业的规模扩大)的过程，忍受重金属的更多的自河能引起表面水质量的降级。因此，这些措施例如调整工业结构，优化清洗技术，并且控制污染来源，应该被提高减轻水质量恶化的当前的状态。

简介：

简介：Waterqualityiscriticaltoensurethatmarineresourcesandtheenvironmentareutilizedinasustainablemanner.TheobjectiveofthisstudyisthereforetoinvestigatetheoptimumplacementofmarineenvironmentalmonitoringsitestomonitorwaterqualityinShanghai,China.Toimprovethemappingorestimationaccuracyoftheareaswithdifferentwaterqualitygrades,themonitoringsiteswerefixedintransitionbandsbetweenareasofdifferentgradesratherthaninotherpositions.Followingbidirectionaloptimizationmethod,first,18candidatesiteswereselectedbyfilteringoutspecificsitecategories.Second,threeofthesewere,inturn,eliminatedbecauseoftheruledefinedbythechangesintheareasofwaterqualitygradesandbythestandarddeviationoftheinterpolationerrorsofdissolvedinorganicnitrogen（DIN）andphosphate（PO_4-P）.Furthermore,indicatorkrigingwasemployedtodepictthetransitionbandsbetweendifferentwaterqualitygradeswhenevernewsamplingsiteswereadded.Thefouroptimizationprojectsofthenewlyaddedsitesrevealthat,alloptimizedsitesweredistributedinthetransitionbandsofdifferentwatergrades,andatthesametimeintheareaswherethehistoricalsitesweresparselydistributed.Newsiteswerealsofoundintheoverlapregionofdifferenttransitionbands.Additionalsiteswereespeciallyrequiredintheseregionstodiscriminatetheboundariesofdifferentwaterqualitygrades.Usingthebidirectionaloptimizationmethodofthemonitoringsites,theboundariesofdifferentwaterqualitygradescouldbedeterminedwithahigherprecision.Asaresult,theinterpolationerrorsofDINandPO_4-Pcouldtheoreticallydecrease.

简介：-Thispapercarriesouttheanalysisofmechanicsofagripsystemofthree-key-boardhydraulictongsdevelopedforoffshoreoilpipelineswhichhasbeensuccessfullyusedinoilfieldsinChina.Themainimprovementofthissystemisthataleverframestructureisusedinthestructuraldesign,whichreducesgreatlythestressesofthemajorcomponentsoftheoilpipetongs.Theoreticalanalysisandnumericalcalcu-lationbasedonthirteenbasicequationsdevelopedshowthattheteethboardofthetongsisnoteasytoslipasfrequentlyhappenstoothersystemsandisofhigherreliability.

简介：-Theturbulencemechanismplaysanimportantpartinthemixingprocessandmomentumtransferofturbulence.Athree-dimensionalPrandtlmixinglengthtidalmodelhasbeendevelopedtosimulatetidalflowsandwaterquality.TheeddyviscositiesanddiffusivitiesarecomputedfromthePrandtlmixinglengthmodel.Inordertomodelthewaterqualityofanestuaryorcoastalareamanyinterdependentprocessesneedtobesimulated.Thesemaybeconvenientlyseparatedintothreemaingroups:transportandmixingprocesses,biochemicalinteractionofwaterqualityvariablesandtheutilizationandre-cyclingofnutrientsbylivingmatter.Themodelsimulatesfulloxygenandnutrientbalance,primaryproductivityandthetransport,reactionmechanismandfateofpollutantsovertidaltime-scales.ThemodelisappliedtonumericalsimulationoftidalflowsandwaterqualityinDalianBay.Themodelhasbeencalibratedagainstalimiteddatasetofhistoricalwaterqualityobservationsandingeneraldemonstra

简介：波浪方程波浪地数字建模技术被用于深层成像在高速度的暗岩的屏蔽的层下面是困难的观察。三个简单高速度的暗岩模型根据暗岩形成特征被设计。低频率的地震信号能够两个都渗透薄高速度的暗岩层并且减少衍射噪音的地震信号精力表演由不平的表面引起了的深层的思考的分析。一个完全的2D暗岩模型的模拟实验证实低频率的信号能被用来在高速度的暗岩层下面增加深层的成像的质量并且在低通行证的过滤器处理实际数据完成好结果。

简介：TheLingtong-Jiaojiaore-centralizeddistrictiscontrolledbythetectonicstressfieldcharacterizedbYthecombinationofextensionandstrike-slip,andthedip,dipangle,pitchandpitchangleoftheorebodiesareallconstrainedbythedynamicconditionsofthetectonics.Themetallotectonicseriesfortheore-centralizeddistrictbelongtothetypeofacombinationofextensionandstrike-slipandcanbesubdividedintofoursub-series.Theore-formingprocessinthebrittleregimecanbedisintegratedintotwostages,i.e.,theembryonicfracturestageandthemegascopicfracturestage,andore-formingprocessisrathercommonintheore-centralizeddistrictattheformerstage.Moreover,severalkeystructuralpatternsandtheirfeatureswerediscussedandapreliminaryassessmentabouttheore-formingprospectinthisdistrictwasmadeinthepaper.

简介：ThemetallogenictheoryofpolygeneticcompoundoredepositistheImportantbasisforlocationpredictionofhiddenoredepositsindiwaregions.Itcanplayanimportantroleineachstepofpredictionresearch,targetingprocedure,acquiringinformationandintegratinginformation.Inthispaper,theauthorsdiscusseshowtoconstructgeologicalconceptbyusingofthemetallogenictheoryofpolygeneticoredepositsforpredictingtargetingarea,toarrangeinvestigationanddetectionforgettingenoughusefulinformation,andtoanalyzeandintegrateinformationforreachingatrustfulpredictionconclusion.Accordingtothesestrategies,weconductasuccessfulpredictionoflocationofhiddenorebodiesintheouteroftheFenghuangshancoppermine,aprincipalproducingmineinTonglingCu-Audistrict.

简介：

简介：~~

简介：在Jimsar的更低的二叠的Lucaogou形成下垂，Junggar盆是在中国的一座典型紧密油的水库。为有效探索和生产，一座高质量的水库的形成必须彻底地被学习。在这个工作，紧密油的水库用许多方法被检验，包括测试的核心和薄节的观察，XRD，SEM，CL和液体包括和同位素。紧密油的水库首先在盐的湖环境被扔，它被白云石，石英，长石，凝灰岩，方解石和黄铁矿的可变混合统治。九张主要岩相被识别：(1)硅质的mudstone，(2)含白云石的硅质的mudstone，(3)含白云石的mudstone，(4)intraclastpackstone/grainstone，(5)ooidgrainstone，(6)bioclastgrainstone，(7)含白云石的siltstone，(8)混合了siliclastic和intraclastgrainstone并且(9)brecciated含白云石的mudstone。毛孔类型被分类进四个范畴：主要intergranular，moldic，晶粒间并且破裂毛孔。紧密油的水库的性质是相当差的，与低孔(街。7.85%)并且渗透(街。0.110mD)并且小毛孔喉咙半径(街。0.086m)。紧密油的水库被重复米规模的沉积统治记录不同湖的扩大和收缩的沉积外形继任。这些紧密的碳酸盐也经历了重要diagenetic改变，例如化成白云石，溶解，neomorphism和晶粒间的创造的骨折和moldic毛孔，vug和破裂；化学、机械的压缩和碳酸盐硬化减少了水库质量。在在Jimusar的水库质量的变化下垂由于岩相类型，高周波的周期的depositional建筑学，溶解紧张，化成白云石和构造相关变丑的联合。这综合研究在理解水库异质和Jimusar有细密纹理的岩石的烃潜力帮助了。

简介：Systemdynamics(SD)theoryhaslongbeendeployedinmodelingcomplexnon-linearinterrelationshipsbut,sofarithasnotbeencommontodothekindofmodelinginsupportofbringingenvironmentalsustainabilitypoliciestopractice.Thisislargelybecausethechallengeofincludingspatialdatahasnotyetbeenwellmet.PotentialforadoptionofSDandGISmethodsincombinationisexemplifiedwiththeresultsofadecision-supportexercisedesignedforsimulationandpredictionofthedynamicinter-relationshipsbetweensocio-economicdevelopmentandenvironmentalqualityforthe"Wen,Pi,Du"countyinSichuanprovince,southwesternChina.

简介：Weinvestigatedtheeffectofthereplacementofdietaryfishoilwithvegetableoilsonthegrowthandfleshqualityoflargeyellowcroaker(Larmichthyscrocea).Thebasaldiet(FO)wasformulatedtocontain66.5%fishmealand6.4%menhadenfishoil;whereastheother3experimentaldietswereformulatedbyreplacingthefishoilwith50%soybeanoil(SO50),100%soybeanoil(SO100)and100%palmoil(PO100),respectively.The4dietswererandomlyassignedto4floatingseacages(3.0m×3.0m×3.0m),andeachwasstockedwith250fishindividualswithaninitialaverageweightof245.29g±7.45g.Thefishwerefedtoapparentsatiationtwiceadayat5:00and17:00,respectively,for12weeks.ExperimentalanalysisshowedthatthespecificgrowthrateoffishfedSO50orPO100weresignificantlyhigherthanthatoffishfedFOorSO100(P<0.05),andcrudelipidcontentsofventralmuscleandvisceraweresignificantlylowerinfishfedFOthaninthosefedtheother3diets(P<0.05).Nosignificantdifferencesinconditionfactor,viscerosomaticindex,hepatosomaticindex,guttedyieldandcolorimetricvaluesoffishamongthedietarytreatmentswereobserved(P>0.05).ComparedtoFOdiet,SO50,SO100andPO100dietsledtosubstantialdecreasesintheliquidlossandwaterlossfromfreshfillets(1d,4℃)(P<0.05).Similarly,thiobarbituricacidreactivesubstance(TBARS)valuesoffilletsunderdifferentstorageconditions(1d,4℃;7d,4℃;4weeks,-20℃;8weeks,-20℃)decreasedsignificantlyafterpartialorcompletereplacementoffishoilwithvegetableoils.Thesefindingsindicatedthatthegrowthperformanceandselectedfleshqualityproperties(liquidholdingcapacityandTBARSvalue)oflargeyellowcroakerweresubstantiallyimprovedbyreplacingdietaryfishoilwithvegetableoils.

简介：三的大楼塞满水坝(湖北()省，中国)在一特别短的时间以内基于持续农业与经济把一个区域转变几千年了成完全不同的环境。这破坏碳，营养素，和金属并且可能的自然biogeochemical周期将包括下游的生态系统影响整个集水，例如沼泽地，河口，三角洲，和邻近的海区域。从已经被记录了的变化开始，这篇文章专注于FerryBox的可能的使用，它是在一艘轮船上或在岸上的一个自动化水质量测量系统，为了监视河的质量的短、长期的发展，水坝在回水区域并且下游地流水。当已经有时，研究规划运行监视河和回水区域的水质量，这些程序被限制与采样和实验室分析装运运动。如此的大小的空间、时间的分辨率不为对水质量的一个全面评价并且为在上下文的预测是足够的人为并且气候变化。因此，由FerryBox使用常规自动化观察的一个概念被介绍。如此的系统很好被适合给反馈让对措施的评价改进水质量，这被显示出。

简介：

简介：Takinghundredsofpiecesofhazardousgeologicalmaps(1:10000)ofThreeGorgesres-ervoirarea(3GR)asbackground,weestablishregionalthree-dimensional(3D)geo-hazardmodelusingDEM(digitalelevationmodel)superposedsurfaceimagesandgeo-hazardselements.Basedonlandslidesandothergeo-hazardsurveydata,usingimprovedB-REP(boundaryrepresenta-tion)entitydatastructure(two-body3Ddatastructure),wesetup3Dsolidmodelsforeachhazardousbodiesineachhazardousgeologicalmaps.Thenweintegratethetwotypesof3Dmodelswithdifferentscalesfromareatopoint,whicharetheregionalgeo-hazard3Dmodelandthesolidmodelsofeachdisasterbody,inordertoprovideavisualprocessingandanalysisplat-formfordangerpartition,stabilityevaluation,disasterpreventionandcontrol,earlywarningandcommand.

简介：Onthebasisofthedataofbiologicalandnonbiologicalfactorscollectedrespectivelyfrom1989to1990andfrom1995to1996inthewatersnearbytheQinshanNuclearPowerStation,theecologicalenvironmentandwaterqualityofthewatersareanalyzedandassessedinthepaper.Theresultsshow:(a)thesurveyedareahasthetypicalecologicalcharacteristicsofhightidalrangeestuary,richnutrientsandlowbiologicalproductivity,(b)tide,runoffandoffshoreseawaterintrusionarethekeyfactorswhichresultinseasonalandannualchangesofvariousbiologicalandnon-biologicalfactors,(c)theriskingofseawatereutrophicationindexisresultedfromenormousamountofthedischargesofindustrialanddomesticsewage,(d)becausethesurveyareaislocatedinahightidal-rangeestuary,thermaleffluentfromcoolingsystemdoesnotinducesignificanttemperaturechanges,(e)thefirststageprojectofQinshannuclearpowerstationhasnonotableimpactsontheecologicalenvironmentinthe

简介：Inthatorchardinginearly-to-midtwentiethcenturysoutheasternAustraliainvolveduseofcertainheavymetalandAscompoundsinregularpest-controlsprayprocedures,someinterestattachestothepossibilitythattheselandparcelsareunderlainbysoilswithabove-backgroundCu,PbandAslevels.InterpretationofLand-coverchangesallowedlandparcelspreviouslyoccupiedbyorchardstobeidentifiedinthe1950sthroughtime-seriesair-photos.Acomparisonofsoilanalysisresultsreferringtosoilsamplesfromcontrolsites,andfromlandparcelsformerlyoccupiedbyorchardists,showsthatcontamination(above-background)levelsofcationsinthepesticidescanbefoundinthetop6cmofformerorchardsoils.Itisclearthatdigitalspatialdatahandlingandculturally-informedairphotointerpretationhasaplaceinsoilcontaminationstudies,land-useplanning(withparticularreferencetore-development)andinadministrationofpublichealth.