简介：Equilibriumproblemofpureexchangeeconomyisstudied.Aneconomicsequilibriummodelwithexpenditurecharacterisproposedandtheexistenceofexpenditureequilibriumisproven.

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简介：这篇论文与污染学习一个随机的内长的生长模型。Itintroduces政府开销和外长的污染消退技术到消除污染并且证明在适当平衡条件下面，主要经济索引(包括经济生长率，最佳的政府开销率)在集中地计划的经济和分散的经济，罐头被模型的参数特别地表示。Theoptimal税政策被分析，并且最佳的污染被导出。

简介：戴耳机工作的利弊“你叫他们的名字三四遍，却得不到一点反应。你打分机过去，他们不接，最后你只好冲他们扔橡皮筋。”

简介：生理社会时差会影响消化系统的运行,比如你吃早饭时,身体却以为在夜间,这可说明吃饭时间与肥胖的关系。一项新研究表明,闹钟可能会打乱身体的正常节奏,让人发胖。这项研究跟一种叫做＂社会时差＂的现象有关,该现象是指人们的自然睡眠模式与上学时间表和工作时间表之间的脱节程度。例如,很多人在周末起床晚,周一却要早起,这使身体产生社会时差。德国慕尼黑大学的研究者通过计算工作日和周末之间睡眠时间早晚的差距,测量了几万个16岁至65岁的人的社会时差,并构建了数学模型,

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简介：这份报纸在小开的经济与productivegovernment开销雇用一个随机的内长的生长模特儿分析最佳的财政政策。首先，小开的经济的astochastic模型被构造。第二，therepresentative代理人的平衡答案“s随机的优化问题被导出。第三，我们获得中央规划者的equilibriumsolutions“s随机的优化问题和最佳的governmentexpenditure政策。最后，最佳的税政策被描绘。

简介：Duringourresearch,Ithasbeenfoundthatbodyaccelerationhasstrongrelationshipswiththehumanenergyexpenditure.Thispaperdiscussesthemethodstoassessphysicalactivityandconcludesthatforaccurateassessmentofphysicalactivityunderfreelivingconditionstherecentlyintroducedaccelerometerlooksmostpromising.Wedevelopedanewcomputerizedmachinetoassessthebodyactivityandenergyexpenditure.Testdatasofthetreadmillexperiment,respirationexperimentand5-kilometer-runningexperimenthavebeenarchieved,wefoundthatbodyaccerationintegralswithtimehaslinearrelationswithbodyenergyexpenture.

简介：EDITOR'SNOTE:Inaninterviewgivenoflatetoourstaffreporter,GaoQiang,ChineseMinisterofHealth,spokeontheachievementsmadebyChinainmedicalandhealthworkduringtheTenthFive-YearPlanperiod(2001-2005),thesoaringmedicalcoststhathaveinvokedmuchpubliccomplaint,waysofcarryingtodepththereformofthemedicalservicesystem,developmentoftheruralcooperativemedicalsystemandcommunity-basedmedicalservicesincities,aswellaspreventionandcontrolofAIDS.Followingisatranscriptoftheinterview.

简介：TheissueofhealthstatusandcarefortheelderlyinurbanandruralareasisbecomingincreasinglyseriousintherapidcontextofpopulationaginginChina.ThepaperanalyzedthehealthstatusofurbanandruralelderlyinChinainthetwo-weekmorbidityrate,prevalencerateofchronicdiseases,disabilitystatus,self-ratedhealthandhealthylifeexpectancyoftheelderlyusingthedatafromthe2006SamplingSurveyontheStatusofUrban/RuralAgedPopulationinChina,theFourthNationalHealthServiceSurveyandthe2006SecondChinaNationalSampleSurveyonDisability,toexplorethecurrentprovisionofsourcesofcarefortheelderlyandtrytomakesomepolicyrecommendationsabouttoimprovethehealthandcarefortheelderlypopulationfacingthecrisisofpopulationaging.

简介：ＨＥＡＬＴＨＢＲＩＥＦＳＣａｎｃｅｒＰａｔｉｅｎｔｓＬｅａｒｎｔｏＦｉｇｈｔｆｏｒＬｉｆｅＭｏｒｅｔｈａｎ１５０ｃａｎｃｅｒｓｕｆｆｅｒｅｒｓｉｎＳｈａｎｇｈａｉｈａｖｅｂｅｅｎｈｅｌｐｅｄｔｏｒｅｇａｉｎｔｈｅｃｏｕｒａｇｅａｎｄｃｏｎｆｉｄｅｎｃ...

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简介：Inthisarticle,theauthorlistedalotoffactstoillustratethehealthhazardsmaybemetduringtravel,anddescribedvarioushealthproblemcausedbythehazards.Travelersmayknowthesehazardsandthentakethenecessarypreventionmeasuresthroughtravelhealthconsultation.Andthetravelersthemselvesmayassistthedoctorsindiagnosisandcurethehealthproblemrelatedtotravel.Inthiswaythetravelershealthmaybeprotected.TheauthorpointedoutthattheChinesepeopleshouldcreatetheirownenvironmentandtrainstaffforthegraduallyinitialingoftravelhealthconsultation.

简介：<正>Background:Increasingcaloricexpenditureinphysicaleducationisconsideredaneffectiveschool-basedapproachtoaddressingthechildobesityepidemic.Thisstudywasdesignedtodeterminesynergisticinfluencesofstudentcharacteristicsandlessonfactorsoncaloricexpenditureinelementaryandmiddleschoolphysicaleducation.Methods:Thestudyusedamulti-leveldesign.Level-1factorsincludedpersonalcharacteristics:age,gender,andbodymassindex.Level-2factorsincludedlessonlength,content,andschoollevel.BasedontheCenterforDiseaseControlandPreventionage—genderadjustedgrowthchart,studentsin87classesfrom14elementaryand15middleschoolswerepre-screenedinto"Overweight","Healthyweight",or"Thin"groups.Oneboyandonegirlwererandomlyselectedfromeachgroupineachclassasdataproviders(264elementaryand294middleschoolstudents).Caloricexpenditurewasmeasuredin243physicaleducationlessonsusingaccelerometers.Results:Analysisofvariancerevealedandhierarchicallinearmodelingconfirmedseparateagebybodymassindex,agebygender,andcontentbylesson—lengthinteractioneffects,suggestingthatthepersonalandlessonfactorsinfluencedcaloricexpenditureindependently.Oldermaleandheavierstudentsburnedmorecaloriesinalllessons.Studentsburnedmorecaloriesin45—60minsportskillorfitnesslessonsthaninshorter(30min)orlonger(75—90min)gameormulti-activitylessons.Conclusions:Thehypothesizedcross-levelinteractionwasnotobservedinthedata.Caloricexpenditurecanbeoptimizedin45—60minsportskillorfitnessdevelopmentlessons.Itcanberecommendedthatschoolsadopt45—60minlessonlengthandprovideskillandfitnessdevelopmenttasksinphysicaleducationtomaximizecaloricexpenditure.

简介：MinistryofCommercereleasedtheincreasequantityofChina'smainimportgoods.Wheninternationaloilpricekeepsincreasing,Chinashowsthesituationofquantityandpriceincreasing.Amongwhichtheimportcrudeoilincreased15.6%year-on-year,thevalueincreased53.9%;whileoilimportquantityincreased

简介：Background:Wearablemonitors（WMs）areusedtoestimatethetimespentinsedentarybehaviors（SBs）andlight-intensityphysicalactivities（LPAs）andtheirassociatedenergycost;however,theaccuracyofWMsinmeasuringbehaviorsonthelowerendoftheintensityspectrumisunclear.Theaimofthisstudywastoassessthevalidityof3WMs（ActiGraphGT3X+;activPAL,andSenseWear2）inestimatingtheintensityofSBandLPAinadultsascomparedwiththecriterionmeasureofoxygenuptake（VO2）measuredbyindirectcalorimetry.Methods:Sixteenparticipants（age:25.38±8.58years）woretheActiGraphGT3X+,activPAL,andSenseWear2devicesduring7sedentary-to-lightactivities.VO2（mL/kg/min）wasestimatedbymeansofaportablegasanalyzer,OxyconMobile（Carefusion,YorbaLinda,CA,USA）.Alldataweretransformedintometabolicequivalentsandanalyzedusingmeanpercentageerror,equivalenceplots,Bland-Altmanplots,kappastatistics,andsensitivity/specificity.Results:MeanpercentageerrorwaslowestfortheactivPALforSB（14.9%）andLPA（9.3%）comparedwithotherWMs,whichwere>21.2%.NoneoftheWMsfellwithintheequivalencyrangeof±10%ofthecriterionmeanvalue.Bland-AltmanplotsrevealednarrowerlevelsofagreementwithallWMsforSBthanforLPA.KappastatisticswerelowforallWMs,andsensitivityandspecificityvariedbyWMtype.Conclusion:NoneoftheWMstestedinthisstudywereequivalentwiththecriterionmeasure（VO2）inestimatingsedentary-to-lightactivities;however,theactivPALhadgreateroverallaccuracyinmeasuringSBandLPAthandidtheActiGraphandSenseWear2monitors.

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