简介：Standingwavesareformedduetothereflectionwhenwavesmeetverticalwall,thereforestrongstructuresareneededtokeepthewallstabilityundertheseriouswaveattack.Fortheimprovementoftheworkingconditionandincreaseofthestabilityofthewall,thelowerreflectingbreakwatershaveat-tractedcloseattentionReportsmostlyfromJapaneseresearchersareoftenconcernedwiththewallofcaissonequippedwithopenwindows.Inthispaperakindofhollow-pipeperforatedbreakwaterisexam-inedwhichwavesmaypartiallyperforateintotheharbourbasin.Thewaveinfrontofthewallcanonlyformpartialstandingwaveandwaveforceisreducedobviously.Andthetheoreticalcalculationofwaveforceandanalysisofwaveforcespectrumareallderived.Comparisonbetweentheresultsfromtheoreticalcalculationandhydraulicmodelingshowsreasonableagreement.

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简介：AstudentsuicidelastWednesdayinGuangzhouhasnotonlymadethevictim'sfamilysadbuthasshowntheseriousnessofdepressionandmentalfragilityamongstudents.

简介：Objective:Tostudytheeffectofhyperventilationonbraintissueoxygenpressure(PtiO2),braintissuecarbondioxidepressure(PtiCO2),pHvalueandintracranialpressure(ICP)duringintracranialhypertensioninpigs.Methods:Autologousarterialblood(5.5ml±0．5ml)wasinjectedintotheleftfrontallobebymicropumptoestablishthemodelofintracerebralhematomainpigs.Afterbloodinjection,theanimalswerehyperventilatedfor15minutestodecreasethepressureofcarbondioxideinarterialblood(PaCO2)to27.35mmHg±11.97mmHg(1mmHg=0.133kPa).Themeanarterialpressure(MAP),intracranialpressure(ICP),cerebralperfusionpressure(CPP),PtiO2,PtiCO2,pHvalueand[HCO3^-]werecontinuouslymonitoredandthebloodgaswasanalyzed.Results:Afterhyperventilation,theICPsignificantlydecreased(P<0.01),theCPPsignificantlyincreased(P<0.05),whilethePtiO2greatlydecreasedtotheischemiclevel(8.20mmHg±2.50mmHg)(P<0.01),thePtiCO2decreased(P<0.01)andthepHvalueincreased(P<0.01).Atthesametime,bloodgasanalysisshowedthatthePaCO2greatlydecreasedandthepHvalueincreased.Conclusions:HyperventilationcandecreasetheICPandthePtiO2significantly.Therefore,hyperventilationshouldbeavoidedearlyafterbraininjury.ThePtiO2monitoringwillbehelpfulfordetectingcerebralischemiaearly.

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简介：Objective:Toinvestigatetheinfluenceofintracranialpressure(ICP)andcerebralperfusionpressure(CPP)onneurologicaldeteriorationandoutcomeofseveretraumaticbraininjury(STBI).Methods:Atotalof245patientswithseveretraumaticbraininjurywerestudiedretrospectivelywithunivariateandmultivariatestudiestoevaluatethecontributionofICP/CPPtoneurologicaldeteriorationandoutcome.Results:Themortalityratesrosefrom16.2%in142patientswhosecourseofdiseasewassmoothto66.7%in103patientswhosufferedfromneurologicaldeterioration.Correspondingly,thefavorableoutcomefallfrom54.2%inthepatientswithoutneurologicaldeteriorationto18.3%inthosewithneurologicaldeterioration.Inthepatientswithclinicalevidenceofneurologicaldeterioration,therelativeinfluenceoftheICPandtheCPPonoutcomewasassessed.Themosepowerfulpredictorsofneurologicaldeteriorationwasthepresenceofintracranialhypertension(ICP>30mmHg,1mmHg=0.133kPa).TheCPPalsohadaprognosticpoweronneurologicaldeteriorationwhenitslevellessthan60mmHg.Conclusions:Itsuggeststhatit'sveryimportanttolowertheintracranialhypertensionandkeeptheCPPnotlessthan60mmHgduringthetreatmentofSTBI.

简介：AIMTo与反弹tonometry(RBT)调查成年畿尼猪眼睛的intraocular压力(IOP)，并且估计包括Carteolol减少药的四特殊热门IOP的效果，Brimonidine，24头12-week-old畿尼猪(48只眼睛)的Brinzolamide和Latanoprost.METHODSTheIOP每二个小时作为基线与RBT一天内被测量。所有动物然后被划分成四个组(Carteolol，Brimonidine，Brinzolamide和Latanaprost组织，n=6)。IOP被测量并且与基线相比1，2，3，5，7，9，15并且在24头畿尼猪(48只眼睛)的treatment.RESULTSThe平均数基线IOP以后的24h是10.3GSH试金工具包。Akt1和Aktphosphorylation(p-Akt1)层次被西方的弄污测量，immunofluorescence.RESULTSAA在高集中导致了毒性并且显著地在20的集中刺激了HCEC的增长

简介：Itisveryimportanttomaintainthelevelofmeanarterialpressure(MAP).TheMAPcontrolisappliedinmanyclinicalsituations,includinglimitingbleedingduringcardiacsurgeryandpromotinghealingforpatient'spost-surgery.Thispaperpresentsafuzzycontroller-basedmultiple-modeladaptivecontrolsystemforpostoperativebloodpressuremanagement.Multiple-modeladaptivecontrol(MMAC)algorithmisusedtoidentifythepatientmodel,anditisafeasiblesystemidentificationmethodeveninthepresenceoflargenoise.Fuzzycontrol(FC)methodisusedtodesigncontrollerbank.Eachfuzzycontrollerinthecontrollerbankisinfactanonlinearproportional-integral(PI)controller,whoseproportionalgainandintegralgainareadjustedcontinuouslyaccordingtoerrorandrateofchangeoferroroftheplantoutput,resultinginbetterdynamicandstablecontrolperformancethantheregularPIcontroller,especiallywhenanonlinearprocessisinvolved.Fordemonstration,anonlinear,pulsatile-flowpatientmodelisusedforsimulation,andtheresultsshowthattheadaptivecontrolsystemcaneffectivelyhandlethechangesinpatient'sdynamicsandprovidesatisfactoryperformanceinregulationofbloodpressureofhypertensionpatients.

简介：Objective:TocompareIOPreadingsobtainedbyGoldmannap-planationtonometrywiththoseobtainedwiththeProViewMonitorMethods:34patientswithopenangleglaucomaorocularhypertensionweretaughttousetheProViewtonometer.ThentheirIOPwasmeasuredthreetimeswiththeGoldmanntonometerandthenthreetimeswiththeProViewtonometer.In14ofthepa-

简介：Airpressureistheforceexertedonyoubytheweightoftinyparticlesofair(airmolecules).Althoughairmoleculesareinvisible,theystillhaveweightandtakeupspace.Sincethere’salotof"empty"spacebetweenairmolecules,aircanbecompressedtofitinasmallervolume.

简介：Inordertosolvetheproblemofhighprecision,completeelectricinsulatingdetectionofthepressuremeasuringsystem,wehavedevelopedthethree-beaminterferometer.Inthispaper,theoperationprinciple,structureofthesystemandmeasuringresultsaregiven.

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简介：Therearefourunitsofhigh-pressuretoultrahigh-pressuremetamorphismextendingfromsouthtonorthacrosstheTongbai-DabieMountains:theepidote-blueschist-faciesunit,thelow-temperatureeclogitefaciesunit,theultrahigh-pressureeclngitefaciesunitandthemedium-temperatureeclogitefaciesunit.ThelatertwounitswereformedduringtheCaledoniansubductionbetweentheTongbai-DabiemicroplateandtheNorthChinaplate,theformertwounitsaretheproductsofIndosiniancontinental-continentalsubductionandcollisionbetweentheYangtzeandtheNorthChinaplates.

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简介：Aninvestigationismadeonthesoilpressureinaninecabinopenedbottomellipticalbarrelstructure.Thecalculationmodelsusingthepenetrationofnegativepressuremethodhavebeendeveloped.Thefirstcalculationmodelisisfortheconstructionstageinvolvingthreezones,namely,passive,transitional,andactiveestablishedforthesoilpressureincabins.Theothercalculationmodelisbasedontheusestage,withthetwo(passiveandactive)zonesforthesoilpressureincabins.Theheightofzonesandthetheoreticalanalyticalsolutionsofinnersoilpressurearederived.Theanalyticalformulasofthemodelsareprovedusingthefiniteelementmethodandexperimentaldata,andtheformulasareanalyzedintheinnersoilpressureinthesamecondition.Thecalculationmodelscanbeusedforothermulti-positionstructuraldesignorconstruction.

简介：AbstractAmbulatory blood pressure monitoring (ABPM) has become indispensable in the current management of hypertension. ABPM is particularly useful in the accurate diagnosis of hypertension. Its diagnostic thresholds had been recently established based on hard clinical outcomes. Cross-classification of patients according to office and ambulatory blood pressure identifies white-coat, masked, and sustained hypertension. ABPM is also useful in cardiovascular (CV) risk assessment. It provides information on daytime and nighttime blood pressure and circadian rhythm, particularly nighttime blood pressure dipping. Nighttime blood pressure is predictive of CV risk independent of office and daytime blood pressure. Isolated nocturnal hypertension is a special form of masked hypertension, with normal daytime but elevated nocturnal blood pressure. It also helps in the evaluation of blood pressure fluctuation and variation, such as morning blood pressure surge and reading-to-reading blood pressure variability. ABPM may derive several other indexes, such as ambulatory blood pressure index and salt sensitivity index, which may be useful in CV evaluations.

简介：<正>Polyhalite(K2SO4·MgSO4·2CaSO4·2H2O)isoneoftheinsolublepotassiummineralwhichiswidelydistributedinsulfate-typepotassium-bearingdeposit,andthetheoreticalconcentrationofK2SO4is28%.Itcanbedirectlyusedasa

简介：Thehighpressureequationofstateforcarbonisconstructedbysomesimplephysicalmodels.Forsolidstate,amultiphaseequationofstateisconsidered,whichincludesfoursolidstates.Forliquidstate,theliquidperturbationtheoryofCRISmodelisused.Inthehightemperature,theelectroniccontributionisobtainedbytheionizationequilibriumtheory.Theresultofourcalculationbasedontheabovemodelsiscomparedwiththefirstprincipledensityfunctionalcalculationandtheothermodels.TheHugoniotandthephasediagramofcarbonarealsocomparedwiththeexperiments.Theresultsaresatisfactory.

简介：Theworkingprofileofwholecycloidalgearismadeupofepicycloidandhypocycloidentirely,accordingtothetheoryofmeshingofgearsandthepropertiesofthecycloid,dealswiththederivationofthepressureangleformulaforthewholecycloidalgearintheory,andrevealschangesofthepressureangleofwholecycloidalgearthroughexamples,findstheapplicationrelationshipsbetweenthepressureangleandotherdesignparametersofthewholecycloidalgear,provesthepossibilitythatthewholecycloidalgearcanbeusedininternalparallelmovegearmechanism,alsoprovidestheoreticfundamentfordesigninginternalparallelmovewholecycloidalgearcorrectly.