簡介：本文針對零長彈簧海洋重力儀開展其中關鍵檢測與控制技術方案的分析、研究與仿真在分析零長彈簧海洋重力傳感器溫度誤差特性的基礎上根據重力儀測量精度要求確定了1﹪的溫控精度指標據此分析和選擇了其關鍵熱敏元件設計了溫控系統結構參數及其主要單元電路研究了各環節漂移對控溫精度的影響為了減小重力傳感器過大的溫度誤差系數并將溫度補償系數的漂移降至最低提出了基于純電阻網絡的最簡補償系統方案并通過串聯和均布阻性元件巧妙地解決了由此產生的阻抗匹配和補償系數線性度問題力平衡反饋控制直接影響重力儀的測量精度和工作穩定性通過對回路動態特性和各環節參數對回路性能影響的分析設計了回路的結構和參數系統采用差動電容檢測由重力變化產生的微量位移本文基于相關檢測原理和方法采用經改進的電荷放大器初步設計了微電容檢測電路分析表明其具有良好的信噪比針對海洋重力儀輸出信號中仍然殘存有比重力變化值大數百倍的垂直加速度干擾信號設計了超低頻巴特沃茲數字濾波器確定了滿足計算精度要求的運算字長可有效抑制海浪對系統的干擾

簡介：天津大學碩士學位論文基于完全非線性BOUSSINESQ方程的波浪數學模型研究姓名谷漢斌申請學位級別碩士專業港口、海岸及近海工程指導教師李紹武200211關鍵詞BOUSSINESQ方程，波浪變形，波浪破碎，源函數造波法，岸方向二琴一規則波，譜估討

簡介：青島海洋大學碩士學位論文黃、渤海溶解態營養鹽研究姓名吳強明申請學位級別碩士專業海洋化學指導教師陳淑珠于志剛2001510吳強明黃、渤海溶解態營養鹽研究濃度低且均勻的特征，底層則由南向北濃度漸次降低磷酸鹽表層濃度是周邊高、中部低，底層則沿西南一東北走向漸次降低；硅酸鹽表底均表現為自西南部向東北方向漸次降低。4、斷面分布。渤海調查海域，溶解無機氮、磷酸鹽淺水區濃度高且上下均勻，深水區則濃度低且層化，硅酸鹽上下均勻分布。北黃海調查海域，各溶解態營養鹽都明顯層化，且含高濃度營養鹽的水團沿底部陡坡爬升，其位置與溝槽處的低溫中心相吻合。5、渤海調查海域葉綠素A的濃度250MG／M3遠高于北黃海112MG／M3，其平面分布呈近岸淺水區濃度高，中部水域低的特征。6、渤海調查海域營養鹽的原子比都適合浮游植物的生長需要，其濃度均大于最低閾值；北黃海調查海域表層磷酸鹽的濃度低于最低閾值，部分海域N／P比顯著高于20，可能是浮游植物生長的限制因素。二、夏季北黃海、渤海膠體形態營養鹽的初步研究運用截留分子量為1000DOLTON的切向流超濾系統對北黃海、渤海的溶解態氮、磷進行的分級研究發現1、夏季北黃海、渤海調查海域膠體形態有機氮CON的濃度為165～38L眥NOL／L，平均濃度為227“MOL／L；膠體形態有機磷COP的濃度為007～O16“MOL／L，平均濃度為010IAMOL／L。2、夏季北黃海、渤海調查海域膠體形態有機氮、磷平均占總溶解有機氮、總溶解有機磷的比例分別為262％和312％。小于1000DOLTON的小分子量真正溶解態有機氮、磷是主要組成部分。3、夏季北黃海、渤海調查海域，溶解無機氮、真正溶解態有機氮UON、膠體形態有機氮CON占溶解態總氮的平均比例分別為27％、52％、21％；無機活性磷、真正溶解態有機磷UOP、膠體形態有機磷COP占溶解態總磷的平均比例分別為44％、37％、19％。溶解態有機氮、磷分別是溶解態總氮、總磷的主要組成部分。4、無機活性磷在超濾過程中行為是“不保守”的，即一部分無機活性磷在超濾過程中被超濾膜截留；海水中存在“可測得的膠體形態無機磷”。卜一一

簡介：分類弩UDC密級編號工學碩士學位論文基于射線理論的淺海聲場數值預報研究碩士研究生李慶來指導教師劉伯勝教授學位級別工學碩士學科專業水聲工程所在單位水聲工程學院論文提交日期2008年2月論文答辯日期2008年3月學位授予單位哈爾濱工程大學哈爾濱T程大學碩士學位論文JRII；；I；；；暑II；罩ABSTRACT111THESTUDYOFUNDERWATERACOUSTICS，THEDATAINTHEACOUSTICFIELDCALLBEGOTNOTONLYBYEXPERIMENT，BUTALSOBYCOMPUTERSIMULATIONWHICHISALLIMPORTANTWAY．WECALLEDTHISWAY“NUMERICALPREDICTIONOFACOUSTICFIELD”，WHICHISONEOFTHEMOSTBASICSUBJECTSINUNDERWATERACOUSTIC．BASEDONAVAILABLEUNDERWATERACOUSTICPROPAGATIONTHEORY，ITBUILDSAMODELCLOSEDONREALSEAENVIRONMENTANDCOMPUTESTHEACOUSTICFIELD．THEMAINCONTENTOFTHISDISSERTATIONISRESEARCHINGTHENUMERICALPREDICTIONOFACOUSTICFIELDINSHALLOWWATERESPECIALLYINLAYEREDSHALLOWWATERUSINGACOUSTICRAYTHEORYANDUSINGTHEOUTCOMEOFTHENUMERICALPREDICTIONTOSTUDYSOMEACOUSTICPROPAGATIONLAWS．THENUMERICALPREDICTIONOFACOUSTICFIELDINUNIFORMSHALLOWWATERCANBECOMPLETEDBYVIRTUALSOURCEFORMULA．BUTTHENUMERICALPREDICTIONOFACOUSTICFIELDINLAYEREDSHALLOWWATERNEEDSTOSTARTFROMTHECOMPUTATIONOFEIGENRAYS．THEACOUSTICINTENSIONOFSOMEPLACEINSHALLOWWATERISTHESUMOFSEVERALEIGENRAYS．THISDISSERTATIONMAINLYRESEARCHEDAWAYTORAPIDLYCOMPUTETHEEIGENRAYSINLAYEREDSHALLOWWATER，ANDBUILTUPAMETHODTOPREDICTINGTHEACOUSTICFIELDINUNIFORMSHALLOWWATERANDLAYEREDSHALLOWWATER．USINGTHISMETHOD，THENUMERICALPREDICTIONOFACOUSTICFIELDINUNIFORMSHALLOWWATERANDLAYEREDSHALLOWWATEROFONELAY，TWOLAYSANDTHREELAYSWASRESPECTIVELYRESEARCHEDINTHISDISSERTATION．THEPREDICTIONRESULTSFITWITHTHECOMMONLAWSOFSOUNDPROPAGATIONINSHALLOWWATER,ANDWEREPROVEDBYTHEEXPERIMENT．THERESEARCHINGACHIEVEMENTISSIGNIFICANTTOTHERESEARCHOFACOUSTICPROPAGATIONANDACOUSTICFLIEDPREDICTIONINSHALLOWWATER．KEYWORDSNUMERICALPREDICTIONOFACOUSTICFIELD；ACOUSTICRAYTHEORY；EIGENRAY；ACOUSTICFIELDJNSHALLOWWATER

簡介：大連理工大學博士學位論文基于圖像分析的海冰幾何參數和拖曳系數參數化研究姓名盧鵬申請學位級別博士專業港口、海岸和近海工程指導教師李志軍20070501基丁幽像分析的海冰兒何參數和臨曳系數參數化研究好的反映了海冰邊緣區內破碎海冰的分布變化。同時，通過對中國第十九次南極科學考察在南大洋航行期間利用船舶雷達獲取的冰山尺寸和運動數據的分析發現，不同尺寸的冰山由于其所經歷的不同熱、動力學過程原因而具有不同的尺寸分布特征，WEIBULJ分布只適合于較小尺寸的冰山，而較大尺寸的冰山分布更接近與冪函數分布。通過對冰山漂流速度和當地的風、流速度的回歸分析發現，風對冰山運動的貢獻是海流貢獻的1／2左右。論文第五章主要對冰水拖曳系數的參數化進行了研究。在回顧已有拖曳系數獲取方法渦動法、剖面法和動量法的基礎上，說明了其局限性和需要改進之處，并提出利用參數化方法建立冰水拖曳系數同海冰幾何形態參數的關系才是提高拖曳系數適應性和準確性的最佳途徑。然后以實驗室物理模擬試驗為基礎并利用一種參數優化辨識算法，建立了孤立冰塊形拖曳系數、摩拖曳系數和冰塊幾何參數之間的關系。通過將原型條件下的冰水總拖曳力考慮成表面摩拖曳力、冰側形拖曳力和冰脊形拖曳力三部分，建立了冰水總拖曳系數同海冰和冰脊幾何形態參數之間的定量關系，并由計算分析發現現場觀測到的拖曳系數隨密集度的非單調變化就是冰側形拖曳力分量作用的重要體現。關鍵詞海冰；動力學；圖像分析；參數化拖曳系數

簡介：河海大學碩士學位論文基于滲透法的潮流數學模型和懸沙數值水槽試驗姓名張旭鋒申請學位級別碩士專業物理海洋學指導教師李瑞杰20080322ABSTRACTNENRSBORESEDIMENTTRANSPORTESPECIALLYSUSPENDEDSEDIMENTTRANSPORTISTREMENDOUSLYIMPACTEDBYTIDECURRENTTHERESEARCHOFWHICHISSIGNIFICANTFORPRACTICALAPPLICATIONANDACADEMICRESEARCHINTHEASPECTSOFCOASTALENGINEERINGMARINEECOSYSTEMANDMARINEENVIRONMENT，ETCCOMPLICATEDTIDEWAVEMOVEMENTINNEARSHORE，COMPLICATEDPHYSICALANDCHEMICALPROPERTYOFSEAWATERANDCOMPLICATEDSEDIMENTPROPERTYLEADTOTHECOMPLICATEDPHYSICALMECHANISMOFSUSPENDEDSEDIMENTTRANSPORTWHICHISAFFECTEDBYTIDECURRENT，SOTHATTHEACCURACYOFNUMERICALSIMULATIONOFSUSPENDEDSEDIMENTTRANSPORTISNOTSATISFIEDINTHISPAPERPERMEATIONMETHODISINTRODUCEDTOTREATMOVINGBOUNDARYFORTHECONSTRUCTIONOF2DTIDECURRENTMODEL，THENTIDEFIELDINRADIATIVESANDBANKRIDGESSEAAREAINNORTHJIANGSUPROVINCEISSIMULATED2DSUSPENDEDSEDIMENTTRANSPORTEQUATIONISSOLVEDANALYTICALLYINSIMPLIFIEDINITIALANDBOUNDARYCONDITIONS，THESENSITIVITYOFTHEPARAMETERSOFANALYTICALRESULTISDISCUSSEDANDTHECHANGINGPROCESSOFSUSPENDEDSEDIMENTCONCENTRATIONISGIVE也ATLAST2DSUSPENDEDSEDIMENTMODELISENNSMLCTEDANDAPPLIEDTOIDEALTOPOGRAPHYTHECONCLUSIONSAREASFOLLOWS1、PEMEATIONMETHODISINHERITEDANDIMPROVEDFROMSLOTMETHOD，W11ICHPROVIDESDEFINITEPHYSICALMEANINGANDINDICATESTHERELATIONBETWEENSEAWATERANDPOROUSWATER2、2一DTIDECURRENTMODELCANPREFERABLYSIMULATETIDEBANKMOVINGBOUNDARYINRADIATIVESANDBANKRIDGESSEAAREAINNORTHJIANGSUPROVINCE3、ANALYTICRESULTINSIMPLIFIEDINITIALANDBOUNDARYCONDITIONSMAYNOTBECONSISTENTWITLLPRACTICALSITUATIONBUTITLAYSFOUNDATIONFORTHEORETICALRESENCHOFSEDIMENTMOVEMENT，ANDANA【YTICALRESULTCANCLEARLYPROVIDESCHANGINGPROCESSOFSUSPENDEDSEDIMENTCONCENTRATIONDISTRIBUTION，WHICHISREFERENCEFORMODELVALIDATION4、INANALYTICALRESULTITISFOUNDTHATTHENUMBEROFVERTICALDIFFUSIONCOEFFICIENTGREATLYAFFECTSIMULATIONRESULT

簡介：中國海洋大學博士學位論文未次冰期東海南部沉積物特征和物源分析姓名金秉福申請學位級別博士專業海洋地質指導教師林振宏200361金秉福末次冰期東海南部沉積物特征和物潭分析中國海洋大學博士學位論文THECHARACTERISTICSANDPROVENANCEOFTHESEDIMENTJNTHESOUTHERNEASTCHINASEADURINGTHELASTGLACIALAGEABSTRACTASARESULTOFTHESEALEVELDROPATTHELASTG1ACIALMAXIMUMINTHELATEQUATERNARY,THEDISTRIBUTIONOFTHELANDANDSEAINTHEEASTERNCHINACONTINENTCHANGEDALOT．THESTUDIESTOEXHIBITTHESEDIMENTARYSOURCEINTHEEASTCHINASEADURINGTHELASTGLACIALAGEAREOFGREATSIGNIFICANCETOREVEALTHEHYDROLOGICSITUATIONOFPALEOCONTINENTANDPALEOOCEAN，CLIMATECHANGEANDENVIRONMENTALEVOLUTION．THEUPPERLAYERSEDIMENTOFCOREQ43INTHEOUTSHELFOFTHESOUTHERNEASTCHINASEASHOWSTHATITISTHEREGRESSIVESEQUENCEOFLITTORALFACIESTOOFFSHOREFACIESANDOFREPRESENTATIVESIGNIFICANCE．THESEDIMENTSINTHECOREAREWEAKLYWEATHERED，LIGHTLYABRADEDANDBADSORTED，THEYHAVETHESAMEFEATUREASFIVERSEDIMENT，WHICHISDERIVEDFROMNEARSOURCEANDDIDNOTEXPERIENCESERIOUSLYTRANSFORMATIONBYOCEAN．DUETOTHERATEOFINSUFFICIENTSEDIMENTSUPPLYTHESEDIMENTATIONRATEISLOW．UNDERTHEHYDRODYNARNITICCONDITIONINTHEOUTSHELFHEAVYMINERALSAREENRICHEDTOACERTAINEXTENT．THERAREOFHOMBLEDEEPIDOTEASSEMBLAGEANDCONTAINSOMEAUTHIGENEP州FEANDGLANCONITE．THECONTENTOFSTABLEMINERALISSMALLANDMINERALMATURITYINDEXTRZG／HPISLOW．BASEDONSTUDIESOFDETRITALMINERALSITISUNRAVELEDTHATTHECOARSEGRAINEDSEDIMENTSAREOFSINGLEANDSTABLESOURCEANDHAVETHESAMETRAITASINTERMEDIATEACIDICGRANITEANDMETAMORPHITES．BENEATHTHERELICSANDOFTHEOUTERSHELFTHEREISHIGHGRADEOFVALUABLEHEAVYMINERALSANDFOREXAMPLEILMENITEREACHINGTHEIIANOMALYORDEROFMARINEPLACERSANDITISOFPOTENTIALRESOURCEPROSPECTS．CLAYMINERALSAREOFILLITE，CHLORITE,KAOLINITEANDSMECTITEASSEMLBLAGE．THECONTENTOFILLITEISVERYHIGHANDITSCRYSTALLINITYINDEXISHIGHTOO，WHICHINDICATETHECOOLANDARIDCLIMATECONDITIONINTHETIMEOFSEDIMENTCONFORMATI011．THEELEMENTALGEOCHEMISTRYCHARACTERISTICSINDICATETHATELEMENTSABUNDANCEISCONTROLLEDSERIOUSLYBYGRAINSIZEOFSEDIMENT．THEELEMENTCONTENTINTHEFINEGRAINEDⅡ

簡介：大連理工大學碩士學位論文海上補給計算機仿真系統總體方案研究姓名陳殿斌申請學位級別碩士專業船舶與海洋工程指導教師黃一20080401海上補給計算機仿真系統總體方案研究THEGENERALRESEARCHONTHECOMPUTERSIMULATIONSYSTEMFORREPLENISHMENTATSEAABSTRACT111THISPAPER，FIRST，THEBASICCONCEPTIONOFCOMPUTERSIMULATIONWASINTRODUCED，ANDTHECLASSIFICATIONOFTHESYSTEMMODEL，MATHEMATICMODELBUILDINGPROCEDURESANDMETHODSANDTHEPROBLEMSSHOULDBENOTEDDURINGTHEDEDUCINGPROCESSHAVEBEENREPRESENTED．THESPECIFICREALIZATIONSTEPSOFCOMPUTERSIMULATIONHAVEBEENEXPLAINEDINDETAJL，ANDTHEHLASIMULATIONSYSTEMSTRUCTUREWHICHPUTFORWARDBYTHEAMERICANDEPARTMENTOFDEFENSEANDFORMALLYACCEPTED∞THEIEEESTANDARDSHASBEENESPECIALLYQUOTED，FOUNDINGABASISFORTHEWORKOFCOMPUTERSIMULATION．SECOND，THEREPLENISHMENTATSEAHASBEENSTATEDGENERALLYFROMTHEFOURASPECTSINCLUDINGTHEORIGINANDDEVELOPMENT，THEMAINFUNCTIONS，THEMETHODSANDTHECHARACTERISTICSOFTHEREPLENISHMENTATSEA．111EQUICKDEVELOPMENTOFTHEREPLENISHMENTATSEAEXTERNALIZEDITSIMPORTANTSTRATEGICVALUEANDSTRONGTACTICFUNCTION，ILLUSTRATINGTHATTHEREPLENISHMENTATSEADIRECTLYRELATEDTOTHEOCEANWARSCHEDULE，EVENTOTHEREALIZATIONOFTHENATIONALMILITARYGAME．THUSUNDERTHECOMPLICATEDCONDITIONOFOCEANBOTHERANDINORDERTOMAINTAINOURNATIONALOCEANRIGHT，WEMUSTIMPROVEOURSTUDYABILITYONTHEREPLENISHMENTATSEAANDMUSTCONSTRUCTTHECOMPUTERSIMULATIONSYSTEMFORTHEREPLENISHMENTATSEA．THIRD，ACCORDINGTOTHEREALLYREQUIREDSTUDYONTHEREPLENISHMENTATSEA，THEASSISTANTDESIGNFORTHEEQUIPMENTOFTHEREPLENISHMENTATSEAANDTHEIROPERATINGPROCESSSIMULATIONANDANALYSISHAVEBEENDETERMINEDASTHETWOBASICTASKSFORCOMPUTERSIMULATIONSYSTEMOFTHEREPLENISHMENTATSEA，ANDINTHISPAPER，THEGENERALREQUIREMENTFORITHASBEENINTRODUCEDINTHE“INTRODUCTION’SECTION．FOURTH，CONSTRUCTIONPRINCIPALSANDPROCEDURES，KEYFUNCTIONANDSTRUCTURESOFCOMPUTERSIMULATIONSYSTEMOFTHEREPLENISHMENTATSEAHAVEBEENPROVIDEDACCORDINGTOITSGENERALREQUIREMENTS，ANDTHESPECIFICREQUIREMENTFOREACHMAINPARTHASBEENDERIVED．FI脅，THEKEYSECTIONOFTHEREPLENISHMENTATSEACOMPUTERSIMULATIONSYSTEMMODELBUILDINGOFTHEWAVESIMULATIONMODEL，SHIPMOVEMENTSIMULATIONMODEL，HIGHLINESIMULATIONMODELANDOILTRANSPORTATIONHOSEMODELHASBEENDISCUSSEDATDIFFERENTDEGREE．SIXTH，THEPROBLEMOFNETWORKINTEGRATION，WHICHISVERYIMPORTANTTOTHECONSTRUCTIONOFCOMPUTERSIMULATIONSYSTEMOFTHEREPLENISHMENTATSEA，HASBEENSTUDIED．INORDERTOSATISFYTHEREQUIREMENTOFTHECONSTRUCTIONOFTHENETWORK，PROBLEMSTHATSHOULDBECONSIDEREDINTHEDESIGNOFENVIRMENTSUPPOIRTPLATFORM，COMMUNICATEPLATFORM，HARDWARERESOURCEPLATFORMOFTHENETWORKHAVEBEENCLEARED．II

簡介：青島海洋大學碩士學位論文取代酰胺類新萃取劑萃取鐵的物理化學性質的研究姓名周革非申請學位級別碩士專業海洋化學指導教師張曼平2001619要曼塑堂盔蘭堡主絲蘭關鍵詞取代酰胺，萃取，鐵，動力學，熱力學物Z五岈ABSTRACTTHESTUDYONTHEPHYSICALCHEMICALPROPERTIESOFTHEEXTRACTIONOFFE3WITHDIAMIDESFROMHYDROCHLORICACIDDIAMIDESARENEWANDEFFICIENTEXTRACTANTSTHESTUDIESONTHECAPABILITYANDMECHANISMOFEXTRACTIONAREHOTSPOTINTHEFIELDBUTTHEYHAVEN’TUSEDASEXTRACTIONSOFOTHERIONSTHANLAIIIANDACIIIINTHISPAPERTWOKINDSOFDIAMIDESHASBEENSYNTHESIZEDANDUSEDINTHEEXTRACTIONOFFE”FROMHYDROCHLORICACIDSOLUTIONSTHEPHYSICALCHEMISTRYPROPERTIESOFTHESEEXTRACTIONSWERESTUDIEDTHEMAINRESULTSAREASFOLLOWS1N，N，N7，N’TETRABUTYLADIPICAMIDETBAALANDNN，OCTANCECYCLOHEXANELACTAM0CHAARESYNTHESIZEDANDTHEPURITYOFTHESEPRODUCTSIS98％AFTERPURIFICATION2THEEXTRACTIONEQUILIBRIUMSOFFC3BYTBAAFROMTHEHCISOLUTIONSINTHEDILUENTSOFBENZENE，TOLUENE，DIMETHYLBENZENE，NHEXANE，CYCLOHEXANE，ANDNOCTANEWERESTUDIED，ANDTHEEXTRACTIONMECHANISMSOFFE3ANDTHERMODYNAMICPARAMETERSWEREDETERMINEDSOMEFACTORSWHICHCOULDAFFECTTHEEXTRACTIONEQUILIBRIUMHAVEBEENSTUDIED，SUCHASDILUENTS，TEMPERATURE，TIME，CONCENTRATIONOFTBAAANDHYDROCHLORIC2

簡介：南京信息工程大學碩士學位論文北太平洋氣候系統年代際演變的主要特征及其海氣耦合機制初探姓名程軍申請學位級別碩士專業氣象學指導教師郭品文于非20050501PRELIMINARYSTUDYONTHEINTERDECADALVARIABILITYOFTHENORTHPACIFICCLIMATEANDASIMPLEMECHANISMOFCOUPLEDOCEANATMOSPHEREINTERACTIONABSTRACTTHEUPPERLAYERHEATSTORAGEATMOSPHEREELEMENTSANDTHETHERMALADVECTIONOFNORTHPACIFICHASBEENANALYZEDHEREONTHEBASISOFSOMEVARIABLEDATAFROMJEDACNCEPSODAANDWOCERESULTSSHOWTHAT1THEFEATURESOFINTERDECADALVARIATIONOFUPPERLAYERHEATSTORAGEWITHA25YEARPERIODAREOBVIOUSINTHENORTHPACIFICOCEANTHEHEATSTORAGEANOMALIESINTHECENTRALNORTHPACIFICSURROUNDEDBYHORSESHOEPATERN2OBSERVATIONSOFATMOSPHEREELEMENTSREVEALINTERDECADALTIMESCALECOHERENTVARIATIONS3ASIMPLECOUPLEDOCEANATMOSPHEREMECHANISMISBUILTBETWEENTHEUPPERLAYERHEATPROCESSOFNORTHPACIFICANDTHEALEUTIANLOWSYSTEMBASEDONABOVERESULTWHENTHEUPPERLAYEROCEANHEATACCUMULATESTHESEASURFACEHEATFLUXISRESTRAINEDALEUTIANLOWISWEAKWESTERLYOVERNORTHPACIFICISSEQUENTIALLYWEAKTHEWEAKWESTERLYMAKESTHESEASURFACEHEATFLUXWEAKENEDFURTHERTHEUPPERLAYEROCEANHEATACCUMULATEMORETHATSAPOSITIVEFEEDBACKWEAKENEDWESTERLYREDUCETHESEASURFACEEKMANTRANSPORTANDTHEVERTICALMIXINGWITHTHERAISEOFQUANTITYOFTHEUPPERLAYERHEATSSTRAISESQUICKLYTHEINCREASINGOCEANATMOSPHERETEMPERATUREDIFFERENCEINCREASETHESEASURFACEHEATFLUXTHEPROCESSOFACCUMULATINGHEATISRESTRAINEDTHATSNEGATIVEFEEDBACKWHENTHESEASURFACEHEATFLUXBECOMESNORMALTHEPOSITIVEFEEDBACKDISAPPEARTHENEGATIVEFEEDBACKCOMETOTHEMOSTPOWERTHATBRINGTHESEASURFACEHEATFLUXBECOMEPOSITIVEANOMALYUPPERLAYEROCEANINVERSETOTHEPROCESSOFDISSIPATINGHEATTHEMECHANISMINDICATESTHATTHECOUPLEDOCEANATMOSPHEREINTERACTIONCANGENERATEINTERDECADALFLUCTUATION4THEFLUXHEATFLUXANDTHERMALADVECTIONOFKUROSHIOANDKUROSHIOEXTENSIONCHARACTERWITHNOTABLEINTERDECADALVARIABILITYTHEANALYSISRESULTSOFSEALEVEL

簡介：渤海海域冬季海水溫度較低每年都會結冰。冰情嚴重時會導致海冰災害給人類在海上的生命財產安全造成危害。通過衛星遙感獲取海冰資料結合氣象條件深入研究海冰生消演變規律利用數值模型模擬海冰演化建立和完善海冰預報模型對于防災減災具有十分重要的意義。為了獲取更為精確的海冰預報基礎資料本文采用CART決策樹方法從MODIS衛星遙感數據反演海冰同時對可見光、近紅外和熱紅外多波段進行自動分類計算有效消除了傳統閾值法反演高懸沙等特殊海洋環境時出現的海冰誤判。反演結果采用高分辨率中國環境與災害監測預報小衛星HJ1A1B進行校驗確保了海冰預報基礎資料的精度。根據本文遙感反演的6個冬季遼東灣海冰面積結合錦州與營口兩個氣象觀測站的實測氣象資料分析可以認為遼東灣海冰面積增長主要受低氣溫影響其中低溫天氣時發生的離岸向大風累積次數直接影響年度海冰面積極值。通過回歸分析發現低于5C°的累積凍冰溫度與凍冰階段的海冰面積具有顯著的線性相關關系?；谧钚《朔ㄩ_發了遼東灣海冰面積的長期和短期兩種預報公式長期預測公式只需提供氣象條件即可進行預報。短期預報公式在預報下一期海冰面積時除需給出氣象條件外還需給出上一期的海冰面積觀測值。擬合及預測結果表明兩個公式均能實現較為準確的海冰面積預報。通過進一步引入非線性逼近能力更為強大的BP神經網絡模型用于開發海冰預報模型預報精度得到進一步提高。本文最后通過提出適合渤海特點的模型參數考慮海洋海冰耦合的海冰動力過程和熱力過程將基于有限體積算法的非結構化網格FVCOM三維海洋模型用于20032004年冬季渤海海冰數值模擬。模擬結果表明水動力、溫鹽以及海冰面積和厚度計算值與實測值吻合均較好所建立的三維海冰數學模型輸入參數合理適合用于渤海中長期海冰數值模擬具有較高的計算精度。FVCOM所采用的非結構化網格模型可實現對復雜岸線的準確描述及重點區域的局部加密與氣象預報相結合未來可實現海冰的精細化模擬與預報。

簡介：河北工業大學碩士學位論文合成鉀離子吸附劑離子交換特性的研究姓名趙亮申請學位級別碩士專業化學工藝指導教師張林棟20080401合成鉀離子吸附劑離子交換特性的研究IISTUDIESONCAPABILITYOFIONEXCHANGEONTHESELFMADEMOLECULARSIEVEABSTRACTINTHEPAPERTHESTABILITYOFTHESELFMADEMOLECULARSIEVEWERESTUDIEDTHESTABILITYISASFOLLOWSHEATRESISTANTCAPACITYACIDRESISTANTCAPACITYALKALIRESISTANTCAPACITYWEDETERMINEDEFFECTOFGRANULARITYVELOCITYONEXCHANGECAPACITYTOKOFTHEMOLECULARSIEVEWEALSOSTUDIEDTHEEXCHANGECAPACITYTOKOFTHEMOLECULARSIEVEINSEAWATERTHERESEARCHOFADSOPTIONALELUTIONALCAPABILITYSOFKINSEAWATERWEREFINISHEDACCDINGTOTHESTUDYWEKNEWTHEADSOPTIONALRATETOKOFTHEMOLECULARSIEVEINSEAWATERISOVER80THEELUTIONALPEAKIS109GLTHEELUTIONALRATEIS923OTHERWISEWEDETERMINEDEFFECTOFCA2MG2ONEXCHANGECAPACITYTOKOFTHEMOLECULARSIEVETHETHERMODYNAMICSKIICSOFIONEXCHANGESYSTEMSWERESTUDIEDTHETHERMODYNAMICSISASFOLLOWSFIRSTWEDETERMINEDTHECAPABILITYOFIONEXCHANGETOKINPUREPOTASSIUMINSEAWATERSECONDWEFINISHEDTHEISOTHERMOFIONEXCHANGEEQUILIBRIUMOFTHEMOLECULARSIEVEUNDERDIFFERENTTEMPERATUREBYSTATICMETHODFURTHERMEBYTHEFIGUREOFISOTHERMALIONEXCHANGEEQUILIBRIUM，WEPROTRACTEDKIELLDIAGRAMLANGMUIRMODELWASSIMULATEDACCDINGTOTHERMODYNAMICSTHEY，THEEXPRESSIONOFIONEXCHANGEEQUILIBRIUMCONSTANTWASDEDUCEDENTHALPYGIBBSFREEENERGYENTROPYWEREFIGUREDOUTFURTHERMEWEPROVEDTHATTHEPROCESSISUNPROMPTEDTHEEXOTHERMICREACTIONTHELOWTEMPERATUREISADVANTAGEOUSTOPOTASSIUMABSPTIONTHEKIICSISASFOLLOWSFIRSTRATECONTROLLINGMECHANISMOFIONEXCHANGEWASFOUNDOUTTHATISFILMDIFFUSIONCONTROLATTHESAMETIMEWEUTILIZEDTWOWAYSWHICHWEREBROKENPHASECONTACTSHALLOWBEDTECHTOCONFIRMTHECRECTNESSOFTHEMECHANISMSECONDUNDERARIETIESOFCONDITIONSSUCHASCONCENTRATIONTEMPERATURECURRENTVELOCITYOFSOLUTIONWEGOTTHEMASSTRANSFERCOEFFICIENTTHEEXPERIMENTALRESULTSWERETHATTHEMASSTRANSFERCOEFFICIENTEXTENDEDWHENTEMPERATURECURRENTVELOCITYOFSOLUTIONRASEDBUTTHEINFLUENCEOFCONCENTRATIONTOTHEMASSTRANSFERCOEFFICIENTWASNOTOBVIOUSKEYWDSPOTASSIUMMOLECULARSIEVEIONEXCHANGETHERMODYNAMICSKIICS

簡介：中國海洋大學碩士學位論文2002～2004年及調水調沙期間黃河下游營養鹽的變化特征姓名王婷申請學位級別碩士專業分析化學指導教師于志剛20070601刷和河水稀釋效應。2004年黃河調水調沙的第～個階段，影響N03N濃度的主要因素是水體的稀釋作用。2002年黃河調水調沙期間，N03“N和DON呈較明顯的負相關，在2004年調水調沙的兩個階段，DIP和DOP也均顯示出了較好的負相關性，尤其是2004年調水調沙的第一個階段，DIP和DOP的相關系數為0871。2002～2004年調水調沙試驗總體上對DIN濃度在全年的變化規律無明顯影響。黃河調水調沙使營養鹽向河口的輸送在時間上非常集中，2002年7月調水調沙短短不到一個月的時間輸送的營養鹽通量便占到當年輸送通量的一半左右，2004年也在25％左右，2002年的營養鹽在年內的分配比2003年和2004更加集中。關鍵詞黃河；營養鹽；通量；調水調沙

簡介：點擊查看更多東中國海真光層深度的遙感反演方法的印證及應用.pdf精彩內容。

簡介：中國海洋大學碩士學位論文四國海盆帕里西維拉海盆浮巖類巖石地球化學研究姓名顏彬申請學位級別碩士專業海洋地質指導教師韓宗珠20080601THESTUDYOFPETROLOGICALGEOCHEMISTRYOFPUMICEFROMTHESHIKOKU．PARECEV．ELABASINABSTRACTTHESHIKOKUPARECEVELABASINANDOKINAWATROUGHLYINGONTHEWESTPACIFICARETYPICALEXTENSIONBACKARCBASINSWHICHAREIDEALFORTHERESEARCHINGOFPLATETECTONICSANDASTHENOSPHERECONVECTING．INTHISTHESIS，8PUMICESAMPLESFROMTHESTUDYAREASAREEXAMINEDBYPETROLOGYGEOCHEMISTRYMETHODSANDTHERESULTSSHOWTHATTHEPUMICEARETALCALKALICSERIESWITHTHESI02OFABOUT55．26％69．58％ANDNA20K20OFABOUT5．45％。10．39％；THEMINERALSINTHECRYSTALOFPUMICEAREPLAGIOCLASEANDCLINOPYROXENEWITHAPHANITICVITRICMATRIX．THESPIDERDIAGRAMOFTRACEELEMENTSDAMSHOWSTHETYPICALISLANDARCPATTERN．THEREEDIAGRAMSHOWSAFIGHTLEANEDPATTERNWITHLAN44．84206．61，LA／YB．1．59～1O．67，PUMICESFROMBOTHTHETWORESEARCHINGAREASAREENRICHEDINLILEANDLREE，WHILEHFSEKEEPSITSINITIALPATTEMOFBASALTICLAVA．THENEGATIVEEUANOMALYINDICATESTHATTHELAVAHASTHEPROCESSOFCRYSTALLIZATION；THECEANOMALYINDICATESTHELAVAHASBEENEFFECTEDBYSUBDUCTIONCOMPOSITIONOROCEANWATER．THENEGATIVETA、SRANOMALYALSOINDICATETHEISLANDARCPATTEM．THEPETROLOGICALGEOCHEMISTRYSTUDYOFPUMICESAMPLESFROMBOTHTHESHIKOKUPARECEVELABASINANDTHEOKINAWATROUGHPROVESTHATTHELAVAOFPUMICESCOMINGFROMTHEEXTENSIONBACKARCBASINSISFORMEDBYTHEMELTINGOFSUBDUCTINGPLATEANDEFFEETEDBYTHESUBDUCTIONCOMPOSITIONBEFOREITSBREAKINGOUT．SOTHELAVAEXPRESSESTHEPROPERTYOFBOTHISLANDAREPATTEMONBOTHTHESPIDERDIAGRAMANDREEDIAGRAM．KEYWORDSPUMICE；SHIKOKUPARECEVELABASIN；OKINAWATROUGH；BACKAREBASIN