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29 个结果
  • 简介:Paulowniaisafast-growingtreespeciesthatismainlyfoundinthecentralpartofChina.ThreemaincultivationareasofPaulowniaaretheYellow-Huai-HaiPlain,southoftheYangtzeRiver,andaridandsemi-aridareasofNorthwesternChina.Thereare9species,4varietiesand4formsusedintheproductioninChina.Studyachievementswereobtainedinthefieldsofspecies/varietyintroduction,selectionandbreeding,afforestationtechniquesaswellasthecontrolofdiseasesandpests.Themainproblemsexistinginthecurrentproductionincludelackofimprovedvarieties,mix-upofdifferentvarietiesandvarietydegenerationduetothelongcourseofasexualreproduction.Theauthorputforwardcountermeasuresfortheproblems.

  • 标签: 泡桐 分布 品种 繁殖 人工造林技术 病虫害防治
  • 简介:ThefuelbreakswereestablishedinsouthChinafrom1950s.Withtheactiveworkoflocalcommunitiesandstategovernment,thefuelbreakshavebeenbuiltfor398,000kilometers.Insomeareas,fuelbreaksandfirebreakshaveconstructedanetworkprimarily,suchasintheprovincesofFujian,Guangdong,Guangxi.Thefuelbreakscanpreventforestfireeffectively.Thathasbeenapprovedbyactualexamplesandburningtests.Thefuelbreaksalsobenefittheforestecosystemandenvironment.Thispapermakes...

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  • 简介:Therewasasurgeinpublishedresearchrelatedtobarefootrunninginthepast2decades,andespeciallyinthepast5years.Forexample,thenumberofreturnsfor'barefootrunning'inGoogleScholarincreaseddramaticallyrelativetothesearchreturnsfor'running'(Fig.1).'Running'relatedreturnsstartedatabout220,000in1997andpeakedatabout376,000in2007(a0.7timesincrease)andgraduallydecreasedtolessthan

  • 标签: 运行 创新 回报率 同行评审 跑步 出版物
  • 简介:AseriesofresearchesonthenutritionproblemsinthecultivationofChinesefirseedlingsandplantations,whicharemainlyfocusontheproblemsofseriouslanddegradationinChinesefirplantationsincontradictionwiththerapiddevelopmentoftheplantationsinChina,weresummarized.Twelveyearswastakenandmorethan30piecesofresearchpaperswerepublishedfortheresearches,whichreferstotheproblemsofgrowtheffect,physiologicaleffect,vegetationvariation,biomassaccumulation,n...

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  • 简介:Thereisalmostuniversalfaithin"innovationcapability",whichcanrealizecreationswithobvioussocialvalues,andaknowledge-basedneedssuchcreation.Thecruxoftheproblemhereinistodevelopinnovationcapabilityandofferagoodenvironmentforthosecreation-drivenpersonsinordertofacilitatethemtoplaytheirroles.Thecreativityhenceisequatedwithatechnical,instrumentalexistence,andinnovationcapabilitythereforeisunderstoodassomethingwithcreativityforever.Thiskindofresearchcannotwellunderstandthesocialnatureofinnovation,andwouldleadtoourover-dependenceonthosetechnicalfactorsinthematterofinnovationofeducation.Inouropinion,thelongingforinnovationisnotonlytheneedoftheknowledge-basedsociety,buttheneedofthewholemodernsociety.AsSchumpeterargues,betweenthegrowthandthedevelopmentthereisnotanabsolutegap,whereseeminglyinsignificantmayexitatrulyearthshakingpower.Ourultimateaimistobuildaneducationaltheoryofinnovationbaseduponthesocialnatureofinnovation,thatis,tobuildameta-theoryofthesharingframeworkoftheactionofeducationalinnovation.

  • 标签: INNOVATION of education INNOVATION CAPABILITY modernity
  • 简介:TheaimofthispaperistostudytheweakintegralconvergenceofKergininterpolation.Theresultsoftheweightedintegralconvergenceandtheweighted(partial)derivativesintegralconvergenceofKergininterpolationpolynomialforthesmoothfunctionsontheunitdiskwereobtainedinthepaper.ThosegeneralizedLiang'smainresultswereacquiredin1998tothemoreextensivesituation.Atthesametime,theestimationofconvergencerateofKergininterpolationpolynomialisgivenbymeansofintroducinganewkindofsmoothnorm.

  • 标签: Kergin插值 弱收敛 积分收敛 光滑函数
  • 简介:Geothermalenergyisapreciousresource,whichiswidelydistributed,varied,andabundant.Chinahasenteredaperiodofrapiddevelopmentofgeothermalenergysince2010.Asshallowgeothermalenergypromoting,thedepthofhydrothermalgeothermalexplorationisincreasing.ThequalityofHotDryRock(HDR)andrelatedexploratorytechnologiesarebetterdevelopedandutilized.Onthebasisofgeothermaldevelopment,thispaperreviewsthegeothermalprogressduringthe"12thFive-YearPlan",andsummarizestheachievementsofhydrothermalgeothermalandhotdryrocksfromgeothermalsurveyandevaluationaspects.Finally,theauthorspredictthedevelopmenttrendofthefuturegeothermalresearchtobenefitgeothermalandhotdryrockresearch.

  • 标签: GEOTHERMAL Hot DRY ROCK (HDR) Thermal
  • 简介:ThepurposeofthispaperistostudytheRSdatawebservicesandrelatedsubjectsofdatastorageanddatamanagement.Basedonananalysisofthepresentsituationanddevelopmenttrendofstorageandmanagementofrasterdataandwebservicetechnology,amanagementandservicesystemarchitectureforRemoteSensingrasterdatabasedonwebservicetechnologieswasdeveloped,theimplementationmethodologiesofthekeytechnologyofthesystemwereexploredandaprototypeofthesystemwasillustrated.

  • 标签: 遥感技术 光栅数据 管理系统 网络技术 服务器
  • 作者: Fang Qiongqiong Wang Dayan
  • 学科: 医药卫生 >
  • 创建时间:2020-08-10
  • 出处:《生物安全与健康 (英文)》 2020年第02期
  • 机构:National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; WHO Collaborating Center for Reference and Research on Influenza, Beijing 102206, China; Key Laboratory for Medical Virology, National Health Commission, Beijing 102206, China
  • 简介:AbstractAnti-influenza drugs are one of the most critical pathways for control of influenza virus infection. Drugs that have been developed or are developing may function via different mechanisms, and so far, inhibitors of influenza virus polymerase are among the most promising types of drugs. Favipiravir and Baloxavir, also named T-705 and Xofluza respectively, have been approved for influenza treatment in Japan and the United States. Favipiravir effectively and selectively inhibits the RNA-dependent RNA polymerase (RdRp) of RNA viruses while Baloxavir specifically targets the cap-dependent endonuclease PA of influenza viruses. These two drugs have been suggested as the first candidate drugs for influenza infection treatment, especially for strains resistant to other anti-influenza drugs. This review will focus on the pharmaceutical mechanisms and anti-influenza activity of these two drugs.

  • 标签: Favipiravir Baloxavir Influenza virus Anti-influenza drug Drug target
  • 简介:AftertheColdWar,hegemonyandpowerpoliticsremainedthemajorobstaclesintheprocessofestablishingafair,just,inclusiveandorderlyglobalpoliticalandeconomicorder.Duetothecomplicatedandvolatileinternationalpoliticalandeconomicsituation,promotingdemocratizationofinternationalrelationsaswellasestablishingafairand

  • 标签: 国际关系 中国政府 民主化 学术研究 国际政治 国际经济
  • 简介:Problemsencounteredintheproductionoflownickelausteniticstainlesssteelhavebeenstudied.Theseproblemsprimarilyincludethechangestothemicrostructureoftheslabduringtheheatingprocess,theformationandremovalofdeformation-inducedmartensiteduringcoldrolling,andtheeffectsoftheannealingprocessonthesurfaceoxidestructure.Areasonablemanufacturingprocesshasbeenproposedonthebasisoftheresearchresultsandhighqualitycold-rolledstripsoflownickelausteniticstainlesssteelhavebeenproduced.

  • 标签: 奥氏体不锈钢 生产 微观结构 冷轧带材 加热过程
  • 简介:reflecting the level of the usage of political strategies of Chinese firms. In addition,according to the mean value in table 1. 3.1 Government Involvement Strategies in Chinese Transitional Environment The first type is government involvement strategy that includes seven political tactics. Inviting the government officials to attend firms’ important occasions (Q27),Q16 and Q15 are higher 0.5. The factors concerning political strategies explain the 66.753 percent of total variance

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