美国签证办理敏感专业介绍

　　我为大家介绍美国签证办理敏感专业介绍，希望对出国留学的同学有所帮助。想了解更多留学精彩内容，为你详细解答。　　办理美国签证的时候，针对有些敏感专业会遭到拒签的情况，那么所谓的敏感专业是指哪些专业呢?下面我就给大家整理一下美国签证拒签容易发生的14个敏感专业。如果自己的专业或研究方向和这些相关，尽量淡化,或者想好说明和做好被check的心理准备了.

　　1.CONVENTIONALMUNITIONS:

　　Technologiesassociatedwithwarheadandotherlargecaliberprojectiles,reactivearmorand

　　warheaddefeatsystems,fusing,andarmingsystems.

　　2.NUCLEARTECHNOLOGY:

　　Thissectioncoverstechnologiesassociatedwiththeproductionanduseofnuclearmaterialforbothpeacefulandmilitaryapplications.Includedaretechnologiesforenrichmentoffissilematerial,forreprocessingirradiatednuclearfueltorecoverproducedplatinum,productionofheavywaterformoderatormaterial,plutoniumandtritiumhandling,aswellascertainassociatedtechnologiesrelatedtohighenergyphysics.Itincludesresearchandposerreactors,breederandproductionreactors,fissileorspecialnuclearmaterials;uraniumenrichment,includinggaseousdiffusion,centrifuge,aerodynamics,chemical,electromagneticisotopicseparation(EMIS)laser,isotopicseparation(LIS);spentfuelreprocessing,plutonium,mixedoxidenuclearresearch,inertialconfinementfusion(ICF),magneticconfinementfusion,plasma,nuclearfuelfabricationincludingmixedoxide(uranium-plutonium)fuels(MOX),heavywaterproduction,tritiumproductionandsue,electromagneticpulse(EMP);hardeningtechnology.

　　3.MISSILE/MISSILETECHNOLOGY:

　　Technologiesassociatedwithairvehiclesandmissilesystems.Thetechnologyneededtodevelopasatellitelaunchvehicleisvirtuallyidenticaltothatneededtobuildaballisticmissile.Technologiesincluderocketsystems,ballisticmissiles,spacelaunchvehiclesandsoundingrocketsandunmannedairequipmentandreentryvehicles.

　　4.AIRCRAFTANDMISSILEPROPULSIONANDVEHICULARSYSTEMS:

　　Thepropulsiontechnologiesincludedareassociatedwithnear-earthsuperandhypersonicflightpropulsionsystemsfor

　　aircraftandmissiles.Manyofthesetechnologiesaredualuse.Technologiesincludeliquidandsolidrocketpropulsionsystems;missilepropulsionandsystemsintegration;individualrocketstatesorstaging/separationmechanism;aerospacethermalandhigh-performancestructures;propulsionsystemstestfacilities.

　　5.NAVIGATIONANDGUIDANCECONTROL:

　　Thesecapabilitiesdirectlydeterminethedeliveryaccuracyandlethalityofbothunguidedandguidedweapons.Thelong-termcoststodesign,buildandapplythesetechnologieshavebeenalimitingproliferationfactor.Technologiesincludethoseassociatedwithinternalnavigationsystems,trackingandterminalhomingdevices;accelerometers,vehicleandflightcontrolsystems.

　　6.CHEMICALANDBIOTECHNOLOGYENGINEERING:

　　Ofspecificconcernistheabilitytodevelop,produce,anddisseminatetoxicchemicals,biologicalandtoxinagents.Thetechnologiesthatcouldbeappliedtoproducechemicalandbiologicalagentsareusedwidelybycivilianresearchlaboratoriesandindustry;thesetechnologiesarerelativelycommoninmanycountries.Advancedbiotechnologyhasthepotentialtosupportbiologicalweaponsresearch.Lookfortechnologiesassociatedwithbacteriology(especiallypathogenic),mutagens,mycology,neurotoxins,reconbianttechnology,toxins,venoms,virology,precursorchemicals,toxicologicalresearch,chemicalproductionequipment.

　　7.REMOTEIMAGINGANDRECONNAISSANCE:

　　Remotesensingtechnologiesareinherentlydual-use;technologiescanbeusedforcivilianimageryprojectsorformilitaryreconnaissanceefforts.Dronesandremotelypilotedvehiclesenhancereconnaissanceabilities.Thesearetechnologiesassociatedwithremotesensingsatellites;imagerysystems;highresolutioncamerasandoptics;airvehicles;remotely-pilotedvehicles,drones.

　　8.ADVANCEDCOMPUTER/MICROELECTRONICTECHNOLOGY:

　　Advancecomputersandsoftwareplayauseful(butnotnecessarilycritical)roleinthedevelopmentanddeploymentofmissilesandmissilesystems,andinthedevelopmentandproductionofnuclearweapons.Advancecomputercapabilitiesarealsousedinover-the-horizontargeting,airborneearlywarningtargeting,electroniccountermeasures(ECM)processors.Thesetechnologiesareassociatedwithsupercomputing,hybridcomputing;speechprocessing/recognitionsystems;neuralnetworks;datafusion;quantumwells,resonanttunneling;superconductivity;advanceoptoeletronics,acousticwavedevices,superconductingelectrondevices,flashdischargetypex-raysystems;frequencysynthesizers;microcomputercompensatedcrystaloscillators.

　　9.MATERIALSTECHNOLOGY:

　　Themetallic,ceramic,andcompositematerialsareprimarilyrelatedtostructuralfunctionsinaircraft,spacecraft,missiles,underseavehicles,andpropulsiondevices.Polymersprovidesealsandsealantsforcontainmentofidentifiedfluidsandlubricantsforvariousvehiclesanddevices.Selectedspecialtymaterialsprovidecriticalcapabilitiesthatexploitelectromagneticabsorption,magnetic,orsuperconductivitycharacteristics..Thesetechnologiesareassociatedwithadvancemetalsandalloys;non-compositeceramicmaterials,ceramic,cermet,organicandcarbonmaterials;polymericmaterials;syntheticfluids;hotisostaticdensifications;intermetallic;organometals;liquidandsolidlubricant;magneticmetalsandsuperconductiveconductors.

　　10.INFORMATIONSECURITY:

　　Technologiesassociatedwithcryptographyandcryptographicsystemstoensuresecrecyforcommunications,video,dataandrelatedsoftware.

　　11.LASERSANDDIRECTEDENERGYSYSTEMSTECHNOLOGY:

　　Lasershavecriticalmilitaryapplications,includingincorporationinguidedordnancesuchaslaserguidedbombsandrangingdevices.Directedenergytechnologiesareusedtogenerateelectromagneticradiationorparticlebeamsandtoprojectthatenergyonaspecifictarget.Kineticenergytechnologiesarethoseusedtoimpartahighvelocitytoamassanddirectittoatarget.Directedenergyandkineticenergytechnologieshavepotentialutilityincounteringmissilesandotherapplications.Lookfortechnologiesassociatedwithatomicvaporlaserisotopeseparation(AVLIS),molecularlaserisotopeseparation(MLIS);highenergylasers(HEL),lowenergylasers(LEL),semiconductorlasers,freeelectronlasers,directedenergy(DE),kineticenergy(KE)systems,particlebeam,beamrider,electromagneticguns,optoelectronics,opticaltracking,highenergydensity,high-speedpulsegeneration,pulsedpower,hypersonic/hypervelocity,magnetohydronynamics.

　　12.SENSORSANDSENSORTECHNOLOGY:

　　Sensorsprovidereal-timeinformationanddata;thesidewithsuperiorsensorshasaconsiderableadvantage.Marinaacousticsiscriticalinanti-submarinewarfare;gravitymetersareessentialformissilelaunchcalibration.Lookfortechnologiesassociatedwithmarineacoustics,opticalsensors,night-visionsdevices,imageintensificationdevices;gravitymeters;highspeedphotographicequipment;magnetometers.

　　13.MARINETECHNOLOGY:

　　Marinetechnologiesareoftenassociatedwithsubmarinesandotherdeepsubmersiblevessels;propulsionsystemsdesignedforunderseauseandnavigationandquietingsystemsareassociatedwithreducingdetectabilityandenhancingoperationssurvivability.Lookfortechnologiesconnectedwithsubmarinesandsubmersibles,undersearobots,marinepropulsionsystems;signaturerecognition;acousticandnon-acousticdetection;acoustic,ware,radarandmagneticsignaturereduction,magnetohydrodynamics;stirringengines.

　　14.ROBOTICS:

　　Technologiesassociatedwithartificialintelligence,automation,computer-controlledmachinetools;patternrecognitiontechnologies.

　　本文针对美国签证拒签容易发生的14个敏感专业进行了介绍，需要办理美国签证的同学，可以通过本文了解这些专业，看看自己的专业是否包括在内，提前做好准备，预防拒签的悲剧发生。