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简介：Propertiesofthesoilsurfacelayer,thetemporalpatternofthemicroclimatevariablesaswellascropconditionwerecombinedtoanalyzethecharacteristicsoftheevapotranspirationfromwinterwheatfieldsinasalinesoilarea.Inordertoaccomplishthisanalysis,evapotranspirationwasdividedintoevaporationfromthesoilandtranspirationfromwheat.Moreover,theeffectofsoilsalinityonevapotranspirationwasevaluatedthroughtherelationshipbetweenactualevapotranspirationandpotentialevapotranspiration(Ea/Eo)andthetotalsoilwaterpotential(ψ)wasdividedintotwocomponents:matricpotential(ψM)andosmoticpotential(ψo).Twositeswithdifferentsalinitylevelswerechosenforthisstudy,locatedinHebeiProvince,China.MeasurementswereconductedinApril-May1997andMay1998.TheBowenratiomethodwasusedtoestimatetheactualevapotranspiration(Ea),whereaspotentialevapotranspiration(Eo)wasestimatedusingPenman'sequation.Measurementsofsoilevaporation(Es)wereobtainedwithmicro-lysimeters,andtranspirationwascalculatedfromthedifferencebetweenEaandEs.Theresultsshowthattranspirationcomprisedonaveragealmost80%oftotalevapotranspiration.Evaporationfromthesoildifferedslightlybetweenyears,butthisvariationwasdominatedbytheleafareaindex(LAI),whichrangedfrom4to5duringthestudyperiodof1997and1998.Soilelectricconductivity(EC),whichisdirectlyrelatedtoosmoticpotential,rangedfrom1.9to3.5mScm-1in1997andwasnegligiblein1998.Ourresultsindicatethatlowerosmoticpotentialdecreasesthetotalsoilwaterpotential,thusaffectingplanttranspiration.Hence,itispossibletosaythatsoilsalinityactuallydecreasesevapotranspirationfromwinterwheatfields.

简介：Inthispaper,aimingattheproblemsofinsufficientsoilnutrientsandhighsaltcontentinWudicoredemonstrationareaofBohaiGranary,amonitoringandmanagementsystemofwater,fertilizerandsaltinsaline-alkalinefarmlandbasedonWebGISwasestablishedinordertomonitorandcontrolwater,fertilizerandsalt.BasedontheWindows.NETplatform,usingB/SmodeofoperationarchitectureandVisualStudio2010asthesoftwaredevelopmentenvironment,therelatedcomponentsinArcGISEnginewereinvokedbyArcGISAPIforSilverlirht,andtheWEBsystemwasdevelopedbyC#andXMALlanguage.Basedontheprincipleofwater,fertilizerandsaltbalance,amonitoringmodelandaregulationmodelforwater,saltandnutrientswereestablished.Intelligentanalysisandapplicationoffarmlandsoildatawererealized,andaprecisionagriculturesystemwithdataquery,earlywarningdiagnosis,monitoringandcontrolofwater,fertilizerandsaltwasformed.Andthe'waterandsalthomologue,watersupplyduetodemand,adequateandmultiple'irrigationschemeandthesaltandalkalireductionschemeof'synergisticconditioningofagentsandnutrients'andanutrientregulationplanfor'stabilizingnitrogen,increasingphosphorus,supplementingpotassiumatthediscretion'and'quick-actingcombiningslowrelease'wereputforward.Comparedwiththeperiodwithoutmonitoringandcontrolofwaterandsalt,theeffectofwatersavingandfertilizersavingwasimproved,andtheyieldofwheatandmaizewasalsosignificantlyincreased.Itprovidedguidanceforlocaluserstoincreasecropproductionandincome,andgreatlyimprovedtheutilizationofresourcesandgrainproduction.

简介：Thispaperhasstudiedthevapor-liquidequilibrium(VLE)forthesalt-containingextractivedistillationofthe1-propanol/watersystem.BinaryVLEdataweremeasuredforthesystemsof1-propanol(1)/KAc(4),ethanediol(3)/KAc(4),and1-propanol(1)/ethanediol(3),withtheVLEdatacorrelatedwiththeNRTLmodelinordertoobtainthemodelparametersofthesebinarysystems.ThebinaryVLEdatacitedintechnicalliteraturewerecorrelatedtoobtainthemodelparametersforotherbinarysystems.VLEdataofternaryandquaternarysystemspredictedbytheNRTLmodelagreedwellwiththeliteraturedata.TheinfluenceofKAc,ethanediol,andtheKAc/ethanediolmixtureonvolatilitybetween1-propanolandwaterwasinvestigatedrespectively.Testresultsshowedthattheabove-mentionedmaterials(KAc,ethanediol)andtheirmixture(KAcandethanediol)havedifferentinfluenceonthevolatility.Whenx3=0.5,andx4=0.05,theazeotropicpointcanbeeliminated.TheNRTLmodelmethodofsalt-containingVLEissimpleandeffectiveforthepredictionofthesystem’sVLEdata.

简介：为2-propanol/water/ethanediol/KAc系统的咸包含的引得出的蒸馏列和咸包含的代理人恢复列被NRTL模型和修改罗斯松驰方法模仿。模拟结果证明在蒸汽液体平衡和NRTL参数的关联方法(TDCM)的盐效果的预言对说的系统合适。四个不同蒸馏技术过程被调查；结果证明咸包含的引得出的蒸馏过程是最好的。引得出的蒸馏列的模仿的设计在不同全部的阶段数字的条件下面被执行，喂地点，倒流比率，混合代理人的数量和KAc的集中。结果证明象17个阶段，在第9舞台的一个喂的地点，1.2的倒流比率，和喂的一个混合代理人的如此的因素1.141kmol/h评价，最好可能被适合操作条件。模仿的设计也为恢复咸包含的代理人为列被做。咸包含的引得出的蒸馏的模拟方法在这个工作简单、有效。

简介：Almosthalfoftheoceanicwatercolumnsexhibitdouble-diffusion.Theimportanceofdouble-diffusioninglobaloceans'saltandheatfluxes,water-massformationandmixing,andcirculationisincreasinglyrecognized.However,suchanimportantphysicalprocessintheoceanhasnotbeenwellstudied.Oneofthereasonsisthedifficultyofparameterizingandquantifyingtheprocesses.Thepaperpresentedhereattemptstoquantifythedouble-diffusivefluxesofsaltandheatintheocean.Previousqualitativeanalysisbyapplyingthewater-massTurnerangle,mTu,totheNorthPacificIntermediateWater(NPIW)layershowedafavorableconditionforsalt-fingeringintheupperNPIWduetotheoverlyingwarm/saltywaterabovethecold/freshNPIWcore,andadoubly-stableconditioninthelowerNPIWwherepotentialtemperaturedecreaseswithdepthwhilesalinityincreases,inducingdoublestratificationwithrespecttobothpotentialtemperatureandsalinity.Thepresentstudygivesaquantitativeestimateofdouble-diffusivefluxesofsaltandheatcontributedbysalt-fingeringintheupperNPIWlayer.

简介：二进制蒸汽液体平衡(VLE)数据为2-propanol/ethanediol和ethanediol/potassium醋酸盐(KAc)的系统被测量。为propanol/ethanediol的系统的VLE数据用热力学的一致性测试被测试。y1和P的平均价值分别地是0.0776和0.1542kPa。VLE数据的上述二个集合与NRTL模型一起被相关。为2-propanol/water/KAc的系统的第三的VLE数据被用来为2-propanol/KAc和water/KAC(叫的TDCM)的二进制系统获得NRTL模型的更合适的参数。为multicomponent系统，第三、第四级，NRTL模型预言的VLE价值与文学数据同意了很好。KAc的KAc，ethanediol和在2propanol和水之间的轻快上的ethanediol的影响分别地被调查。结果证明上述材料和混合物在在2-propanol和水之间的轻快上有不同影响。为咸包含的VLE的关联和预言的方法为说的系统简单、有效。

简介：<正>1IntroductionThemainproductionofYabulaisaltlakewasoriginalsaltandrecycledsaltmanyyearsago.Afterdecade’sproduction,thesalelakeresourceismoreandmoredeficient.Glauber’ssaltandmagnesiumsaltareconcentratedinbrinenow.Itcouldaffectthequalityofthesalt.Inrecentyears,researchhaddonemuchworkto

简介：salt(盐）是人们一日三餐必不可少的调味品，在古代曾被视为珍品，罗马时期还充当过军饷。即使是现在，在婆罗洲和非洲的部分地区仍可作为货币流通；因和日常生活息息相关，salt的习惯用语非常丰富、生动。值得一提的是．我们在掌握这些习语的同时，还应注意它们潜在的文化意蕴。

简介：在巴以地区有一处神秘的地方，既是传说中的宗教圣地，又是令人神往的旅游胜地。它，就是死海。现在，就让我们赶快来领略一下死海风情吧。

简介：ＴｈｅＴａｌｅｏｆＴｅａａｎｄＳａｌｔ￥／／Ｉｎａｎｃｉｅｎｔｔｉｍｅｓ，ｔｈｅＸａａｎｄＮｕｔｒｉｂｅｓｍａｄｅｔｈｅｉｒｈｏｍｅｓｏｎｔｈｅｏｐｐｏｓｉｔｅｂａｎｋｓｏｆａｒｉｖｅｒ，ｌｉｎｋｅｄｏｈｌｙｂｙａｓｕｓｐｅｎｓｉｏｎｂｒｉｄｇｅ．Ｔ...

简介：salt(盐)与人的生活息息相关,它有强身、杀菌、防腐等功效。盐究竟起用于何时,已无从考证。在古希腊,右手拿盐的陌生人是受欢迎的,还有,哀悼亡者的祭奠品中缺盐不可;在古挪威,有这样一个谚语:“Helpmetosalt,helpmetosorrow”,(请我食盐,使我悲伤)。它源于挪威的古老观念:人要流很多眼泪才可以溶化撒掉的盐;考古发现,早在几千年前,古埃及人做木乃伊的

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简介：1.atalkfullofsalt:饶有风趣的谈话Thatwasatalkfullofsalt.2.anoldsalt:老练的水手Hisgrandfatherwasanoldsalt.3.above(below)thesalt:在上(下)席Marywasinvitedtobeabovethesalt.4.assaltasfire:极咸Thebeefisassaltasfire.5.saltwater:海水;泪水Afterworkingthismorning,Cullumcamebackwithsaltwater.

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简介：TsakhalholiesinMarkhamCounty,ChamdoPrefectureoftheTibetanAu-tonomousRegion(TAR).Geo-graphicallyitlooksquitemysteri-ousandithasauniqueculture.Formally,itisreferredtoas"TsakhalhoJangba(Naxi)ethnicTownofMarkham".ItislocatedinthesoutheastofTAR,betweentheeastbankofLancangRiverandDechenCounty.Atanelevationofabout2,400meters,thetownisadjacenttoPaltangofSichuanProv-inceon

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简介：话题呈现水是万物之源,没有水,人类和动物就无法生存。因此,人人都有保护水资源和节约水资源的职责。某期刊正在开展以水为主题的征文活动,请你根据下面的信息写一篇短文参加征文。短文内容包括水的重要性、水的用途、水的现状及我们该如何保护水源和节约用水。

简介：水对于人们来说非常重要。我们必须每天喝水。没有水我们不能生存。水在我们周围随处可见。在家里，我们用水洗衣服、洗碗、做饭、打扫房间、制作饮料、刷牙、洗澡等。在工作中，人们用水灭火、种菜、在工厂做东西等。我们还可以在地球上游泳。水对我们很重要，不是吗？

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