簡(jiǎn)介：質(zhì)子交換膜的研究進(jìn)展質(zhì)子交換膜的研究進(jìn)展摘要質(zhì)子交換膜一直以來(lái)都是質(zhì)子交換膜燃料電池中的研究重點(diǎn)，在過(guò)去的幾十年間質(zhì)子交換膜的種類(lèi)不斷增加，其性能也不斷提高。目前，質(zhì)子交換膜種類(lèi)主要分為以下幾種（1）全氟磺酸（PFSA）型質(zhì)子交換膜及其改性膜；（2）磺化聚合物質(zhì)子交換膜；（3）磷酸摻雜聚合物膜；（4）基于聚苯并咪唑的質(zhì)子交換膜，本文對(duì)這幾種質(zhì)子交換膜的研究進(jìn)展進(jìn)行了綜述。關(guān)鍵詞質(zhì)子交換膜；改性；研究進(jìn)展。RESEARCHPROGRESSOFPROTONEXCHANGEMEMBRANEABSTRACTPROTONEXCHANGEMEMBRANEHASALWAYSBEENARESEARCHFOCUSINPROTONEXCHANGEMEMBRANEFUELCELLINTHEPASTDECADES,THENUMBEROFPROTONEXCHANGEMEMBRANEHASINCREASEDANDITSPERFORMANCEHASBEENIMPROVEDCONSTANTLYATPRESENT,THETYPESOFPROTONEXCHANGEMEMBRANEAREMAINLYDIVIDEDINTOTHEFOLLOWINGTYPES1PERFLUOROSULFONICACIDPFSAPROTONEXCHANGEMEMBRANEANDITSMODIFIEDMEMBRANE2SULFONATEDPOLYMERPROTONEXCHANGEMEMBRANE3PHOSPHORICDOPEDPOLYMERFILM4BASEDONTHEPROTONEXCHANGEMEMBRANEOFPOLYBENZIMIDAZOLE,THISPAPERREVIEWSTHERESEARCHPROGRESSOFTHESESEVERALPROTONEXCHANGEMEMBRANESKEYWORDSPROTONEXCHANGEMEMBRANETHEMODIFICATIONRESEARCHPROGRESS化學(xué)電源結(jié)課論文第2頁(yè)共18頁(yè)側(cè)鏈比NAFION系列膜側(cè)鏈更加短，DOW系列膜結(jié)構(gòu)更為穩(wěn)定，用于燃料電池中性能優(yōu)于NAFION系列膜。但是由于DOW系列膜在制備過(guò)程中的單體合成更加困難，所以其價(jià)格也遠(yuǎn)高于NAFION系列膜。圖1NAFION膜和DOW膜的化學(xué)結(jié)構(gòu)式PFSA型質(zhì)子交換膜具有很好的質(zhì)子導(dǎo)電性，但是這種高的質(zhì)子導(dǎo)電率的前提條件是膜需要保持適當(dāng)?shù)臐穸?。PFSA型質(zhì)子交換膜中的磺酸基團(tuán)在干燥或者低濕度條件下本身并不能電解出H，在適當(dāng)?shù)臐穸葪l件下全氟磺酸膜里的磺酸基團(tuán)才能夠電離出H。PFSA型質(zhì)子交換膜分子鏈結(jié)構(gòu)中主鏈碳氟鏈結(jié)構(gòu)具有疏水性，而側(cè)鏈的磺酸基團(tuán)具有親水性，當(dāng)膜吸收水分后，水分子會(huì)聚集到親水的磺酸基團(tuán)周?chē)?。膜中的水通過(guò)控制膜內(nèi)質(zhì)子通道的構(gòu)造、尺寸和聯(lián)通性來(lái)影響膜的質(zhì)子電導(dǎo)率。當(dāng)膜吸收足夠多的水時(shí)，膜內(nèi)會(huì)形成充滿(mǎn)水的親水相和疏水相1。此時(shí)當(dāng)膜中水含量很低時(shí)，膜中水會(huì)形成孤立的親水聚集相而不會(huì)形成聯(lián)通的質(zhì)子通道。此時(shí)，質(zhì)子在膜中的傳遞是以GROTTHUSSMECHANISM機(jī)理傳遞2，即質(zhì)子沿著氫鍵從一個(gè)分子跳躍到另一個(gè)分子進(jìn)行質(zhì)子傳遞。然而當(dāng)膜中有足夠的水含量時(shí)，膜中的親水相形成聯(lián)通的質(zhì)子通道，此時(shí)質(zhì)子在膜中主要以VEHICLE

簡(jiǎn)介：內(nèi)蒙古科技大學(xué)本科生畢業(yè)畢業(yè)論文題目包頭北奔重型汽車(chē)有限公司重卡營(yíng)銷(xiāo)策略的研究學(xué)生姓名學(xué)號(hào)專(zhuān)業(yè)工商管理班級(jí)指導(dǎo)教師內(nèi)蒙古科技大學(xué)畢業(yè)論文說(shuō)明書(shū)IIMARKETINGSTRATEGYOFBAOTOUBEIBENHEAVYTRUCKENTERPRISESHEAVYTRUCKABSTRACTWITHTHEDEVELOPMENTOFNATIONALECONOMICANDIMPROVEMENTOFPEOPLESLIVINGSTANDARDS,THEGOVERNMENTINCREASINGLYFOCUSEDONBUILDINGANEWCOUNTRYSIDETOPROMOTECOORDINATEDDEVELOPMENTANDNARROWTHEURBANRURAL,REGIONALDISPARITIESTHEGOVERNMENTADOPTEDHOMEAPPLIANCESANDAUTOMOBILECOUNTRYSIDEPOLICIESINORDERTOTHOROUGHLYIMPLEMENTTHESCIENTIFICCONCEPTOFDEVELOPMENT,ACTIVELYEXPANDDOMESTICDEMANDANDCONSUMERRESPONSETOTHEPEASANTSUPGRADENEWTRENDLIGHTWEIGHTANDMOTIVATIONOFTHETRUCKHAVEANIMPORTANTEFFECTONHEAVYTRUCK,ANDUPTOTHESTATEANDLOCALIMPLEMENTATIONOFTHEROADMAINTENANCEFEECHARGINGPOLICYCANCELEDANDWEIGHTCHARGEINGNEARLYTWOYEARSTBEIBENHEAVYTRUCK,ASTHEWELLKNOWNBRANDOFHIGHGRADEHEAVYTRUCK,HOWWILLFACESUCHCHALLENGESANDOPPORTUNITIESCOMPETITIONAMONGENTERPRISESISLARGELYDEPENDSONMARKETINGCAPABILITIESENTERPRISEOBJECTIVESWHETHERCANBEACHIEVEDDEPENDSONTHETARGETMARKETSNEEDSANDDESIRESTHATAREMADERIGHTJUDGMENTSWHETHERCANTAKEMOREEFFECTIVEWAYTHANCOMPETITORSTOMEETCONSUMERDEMANDWHETHERTHEORGANIZATIONALBENEFITS,CUSTOMERNEEDSANDINTERESTSOFTHECOMMUNITYCANCOMBINEORGANICLYTHEREFORE,AMARKETINGSTRATEGYRELATEDTOFLOURISHINGSUCCESSORFAILUREOFTHEENTERPRISEFORMULATINGAREASONABLEMARKETINGSTRATEGYISUTMOSTIMPORTANCEOFTHEENTERPRISESBASEDONTHEHEAVYTRUCKINDUSTRYMARKETANALYSIS,BEIBENCOMPANYANDCOMPETITORANALYSIS,SWOTANALYSISMETHODUSED,FROM4PTHATPRODUCT,PRICE,CHANNELS,COMMUNICATIONPOINTOFVIEW,TOFORMULATEAREASONABLEMARKETINGSTRATEGYFORTHECOMPANYANDFURTHERDEVELOPMENT。

簡(jiǎn)介：密級(jí)公開(kāi)公開(kāi)學(xué)號(hào)111347畢業(yè)設(shè)計(jì)（論計(jì)（論文）文）北京地區(qū)會(huì)展企業(yè)人才培育的研究北京地區(qū)會(huì)展企業(yè)人才培育的研究院（系、部）人文社科學(xué)院姓名李雨詩(shī)院（系、部）人文社科學(xué)院姓名李雨詩(shī)年級(jí)旅113年級(jí)旅113專(zhuān)業(yè)旅游管理專(zhuān)業(yè)旅游管理指導(dǎo)教師趙新峰指導(dǎo)教師趙新峰教師職稱(chēng)講師教師職稱(chēng)講師2015年05月08日北京北京石油化工學(xué)院本科學(xué)位論文I摘要摘要近些年來(lái)，北京奧運(yùn)會(huì)、世博會(huì)、婚博會(huì)、亞運(yùn)會(huì)等大型會(huì)展活動(dòng)的成功開(kāi)展讓我們看到了我國(guó)會(huì)展業(yè)未來(lái)發(fā)展的巨大潛力。隨著我國(guó)會(huì)展業(yè)的不斷發(fā)展，對(duì)會(huì)展人才要求也開(kāi)始逐步提高。然而，就當(dāng)前我國(guó)會(huì)展業(yè)發(fā)展現(xiàn)狀來(lái)看，多數(shù)會(huì)展人員是半路出家，缺乏會(huì)展工作系統(tǒng)性知識(shí)的了解和操作技能，長(zhǎng)期如此必然會(huì)對(duì)發(fā)展我國(guó)會(huì)展經(jīng)濟(jì)產(chǎn)生諸多不利影響。對(duì)此，筆者主要采取文獻(xiàn)研究法、歸納總結(jié)法以數(shù)據(jù)統(tǒng)計(jì)法等相結(jié)合的研究方法，綜合運(yùn)用經(jīng)濟(jì)學(xué)、統(tǒng)計(jì)學(xué)、管理學(xué)等學(xué)科的方法和知識(shí)，以北京地區(qū)會(huì)展企業(yè)為例，研究會(huì)展企業(yè)人才的培育現(xiàn)狀及問(wèn)題，并就問(wèn)題提出相應(yīng)的解決對(duì)策，力爭(zhēng)在研究方法上有所突破，并希望能夠?yàn)橄嚓P(guān)研究提供一定的借鑒。關(guān)鍵詞關(guān)鍵詞會(huì)展企業(yè)人才培育北京

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簡(jiǎn)介：哈爾濱理工大學(xué)學(xué)士學(xué)位論文I北京市比木立方五層辦公樓框架結(jié)構(gòu)設(shè)計(jì)摘要本工程結(jié)構(gòu)設(shè)計(jì)為位于北京市5層框架結(jié)構(gòu)辦公樓，首先進(jìn)行了結(jié)構(gòu)選型布置和框架構(gòu)件材料的選擇，并預(yù)先估算出框架構(gòu)件尺寸，之后進(jìn)行了板的結(jié)構(gòu)設(shè)計(jì)，并進(jìn)行荷載計(jì)算，利用分層法等方法求出所有荷載作用下的內(nèi)力作用，將求出的內(nèi)力作用進(jìn)行彎矩調(diào)幅、內(nèi)力調(diào)整等方法之后，進(jìn)而進(jìn)行內(nèi)力組合求出最不利組合作用，根據(jù)最不利組合作用進(jìn)行梁、柱截面設(shè)計(jì)，并對(duì)節(jié)點(diǎn)進(jìn)行調(diào)整，最后進(jìn)行了基礎(chǔ)、樓梯的結(jié)構(gòu)設(shè)計(jì)。關(guān)鍵詞荷載計(jì)算，作用計(jì)算，效應(yīng)計(jì)算，內(nèi)力調(diào)整，內(nèi)力組合，截面配筋哈爾濱理工大學(xué)學(xué)士學(xué)位論文III目錄摘要IABSTRACTII北京市比木立方五層辦公樓框架結(jié)構(gòu)設(shè)計(jì)ITHEFIVESTORYOFFICEBUILDINGOFBIMCUBEII目錄III第1章結(jié)構(gòu)設(shè)計(jì)概況111工程概況112建筑平面圖113結(jié)構(gòu)選型布置及計(jì)算簡(jiǎn)圖2131構(gòu)件材料選擇3132構(gòu)件尺寸3第2章樓（屋）面板的結(jié)構(gòu)設(shè)計(jì)621樓（屋）面板的結(jié)構(gòu)計(jì)算6211豎向荷載結(jié)算6212彈性理論計(jì)算7第3章第⑦軸橫向框架作用計(jì)算1931豎向荷載作用計(jì)算19311樓（屋）面恒荷載19312樓（屋）面可變荷載2332風(fēng)荷載計(jì)算2533水平地震作用計(jì)算26第4章第⑦軸橫向框架作用效應(yīng)計(jì)算3641豎向荷載下的內(nèi)力計(jì)算3642水平荷載作用下的內(nèi)力計(jì)算55421水平地震作用下的內(nèi)力計(jì)算55422風(fēng)荷載作用下的內(nèi)力計(jì)算6543內(nèi)力組合68431彎矩調(diào)幅68432內(nèi)力調(diào)整70第5章框架構(gòu)件的截面設(shè)計(jì)2451框架梁的截面設(shè)計(jì)2452柱截面設(shè)計(jì)3953節(jié)點(diǎn)設(shè)計(jì)56

簡(jiǎn)介：助理工程師評(píng)定論文助理工程師評(píng)定論文論文標(biāo)題論文標(biāo)題淺談防水工程的施工工藝和防水質(zhì)量控制淺談防水工程的施工工藝和防水質(zhì)量控制單位名稱(chēng)單位名稱(chēng)云南建工集團(tuán)第七建筑工程有限公司云南建工集團(tuán)第七建筑工程有限公司姓名名楊飛鴻楊飛鴻1目錄目錄1引言211國(guó)內(nèi)防水材料現(xiàn)狀與發(fā)展212研究屋面防水的目的和意義22、建筑屋面防水工程存在的主要質(zhì)量問(wèn)題321防水工程的分級(jí)322屋面防水的質(zhì)量通病33屋面防水工程施工技術(shù)要求431卷材屋面防水432剛性防水屋面633涂膜防水屋面74屋面防水施工質(zhì)量控制措施841施工前的技術(shù)準(zhǔn)備工作842對(duì)施工人員及施工程序的要求843對(duì)防水材料的質(zhì)量要求844注意防水施工質(zhì)量控制要點(diǎn)945做好蓄水試驗(yàn)工作95總結(jié)9

簡(jiǎn)介：密級(jí)公開(kāi)公開(kāi)學(xué)號(hào)111156畢業(yè)設(shè)計(jì)（論計(jì)（論文）文）北京地鐵服務(wù)質(zhì)量調(diào)查研究院（系、部）院（系、部）經(jīng)濟(jì)管理學(xué)院經(jīng)濟(jì)管理學(xué)院姓名名王金輝王金輝年級(jí)級(jí)20112011級(jí)專(zhuān)業(yè)業(yè)市場(chǎng)營(yíng)銷(xiāo)市場(chǎng)營(yíng)銷(xiāo)指導(dǎo)教師指導(dǎo)教師李欣李欣教師職稱(chēng)教師職稱(chēng)教授教授2015年5月1日北京北京地鐵服務(wù)質(zhì)量調(diào)查研究北京石油化工學(xué)院畢業(yè)設(shè)計(jì)（論（論文）文）任務(wù)書(shū)學(xué)院（系、部）經(jīng)濟(jì)管理學(xué)院專(zhuān)業(yè)市場(chǎng)營(yíng)銷(xiāo)班級(jí)營(yíng)111學(xué)生姓名王金輝指導(dǎo)教師/職稱(chēng)李欣/教授1畢業(yè)設(shè)計(jì)（論文）題目北京地鐵服務(wù)質(zhì)量調(diào)查研究2任務(wù)起止日期2014年12月21日至2015年6月21日3畢業(yè)設(shè)計(jì)（論文）的主要內(nèi)容與要求課題簡(jiǎn)介隨著地鐵的不斷發(fā)展，乘客對(duì)地鐵運(yùn)營(yíng)服務(wù)的不斷關(guān)注，乘客對(duì)運(yùn)營(yíng)服務(wù)質(zhì)量要求日益提高。對(duì)于地鐵運(yùn)營(yíng)企業(yè)而言，乘客不僅是地鐵服務(wù)的對(duì)象，更是企業(yè)的利潤(rùn)源泉，乘客對(duì)地鐵服務(wù)質(zhì)量的滿(mǎn)意程度就顯得至關(guān)重要。只有以乘客為焦點(diǎn)，大力關(guān)注乘客滿(mǎn)意度，樹(shù)立乘客至上服務(wù)意識(shí)，地鐵才能有效實(shí)現(xiàn)科學(xué)可持續(xù)發(fā)展。如何提高地鐵乘客滿(mǎn)意程度，及時(shí)了解乘客需求和感受，找出地鐵服務(wù)缺陷及改進(jìn)措施，使地鐵運(yùn)營(yíng)企業(yè)立足于城市客運(yùn)市場(chǎng)，最大限度的吸引客流、增加效益，實(shí)現(xiàn)提升服務(wù)品質(zhì)、增強(qiáng)市場(chǎng)競(jìng)爭(zhēng)力、打造地鐵品牌、創(chuàng)造一流企業(yè)的目標(biāo)，建立一套科學(xué)合理、全面系統(tǒng)、切實(shí)可行、容易操作的地鐵乘客滿(mǎn)意度評(píng)價(jià)體系成為當(dāng)務(wù)之急。本文旨在找出北京地鐵服務(wù)的找出不足，并提出相應(yīng)的提升服務(wù)質(zhì)量的對(duì)策，做出結(jié)論,改善我國(guó)地鐵服務(wù)的服務(wù)質(zhì)量現(xiàn)狀。任務(wù)和要求（1）查閱相關(guān)資料，了解北京地鐵近些年來(lái)的發(fā)展?fàn)顩r。（2）通過(guò)實(shí)地調(diào)查、上網(wǎng)搜集資料，查閱相關(guān)書(shū)籍報(bào)刊，咨詢(xún)指導(dǎo)老師等方法，借鑒他人成果。3運(yùn)用所學(xué)的市場(chǎng)營(yíng)銷(xiāo)，統(tǒng)計(jì)學(xué)，市場(chǎng)調(diào)研等學(xué)科的理論和知識(shí)并結(jié)合案例對(duì)

簡(jiǎn)介：南京師范大學(xué)泰州學(xué)院畢業(yè)論文（設(shè)計(jì)）（2013屆）屆）題目目加熱爐的溫度調(diào)節(jié)控制系統(tǒng)設(shè)計(jì)院（系、部院（系、部）電力工程學(xué)院電力工程學(xué)院專(zhuān)業(yè)業(yè)電氣工程及其自動(dòng)化電氣工程及其自動(dòng)化姓名名學(xué)號(hào)號(hào)指導(dǎo)教師指導(dǎo)教師南京師范大學(xué)泰州學(xué)院教務(wù)處南京師范大學(xué)泰州學(xué)院教務(wù)處南京師范大學(xué)泰州學(xué)院電力工程學(xué)院加熱爐的溫度調(diào)節(jié)控制系統(tǒng)設(shè)計(jì)IIABSTRACTTHETEMPERATURECONTROLSYSTEMISWIDELYUSEDINTHEFIELDOFINDUSTRIALCONTROL,SUCHASBOILERSTEELPLANT,MACHINERYPLANT,THETEMPERATURECONTROLSYSTEMINTHERMALPOWERPLANTRELAYCONTROLTECHNOLOGYISWIDELYUSEDINHEATINGFURNACEOFELECTRICCONTROLSYSTEMOFTHETRADITIONAL,DUETOREALIZELOGICCONTROLWITHFIXEDWIRINGOFHARDWARE,THECONTROLSYSTEMTOINCREASEINSIZE,POWERCONSUMPTION,EFFICIENCYISNOTHIGHANDISSUSCEPTIBLETOFAILURE,CANNOTGUARANTEETOPRODUCENORMALINDUSTRY,WITHTHEDEVELOPMENTOFCOMPUTERCONTROLTECHNOLOGY,THETRADITIONALRELAYCONTROLTECHNOLOGYMUSTBEBASEDONCOMPUTERTHEPLCCONTROLTECHNOLOGYTOREPLACETHETEMPERATUREOFTHEHEATINGFURNACEISALARGEINERTIASYSTEM,USINGPIDCONTROL,WITHTHEEXPANDINGOFPLCFUNCTIONINMANYPLCCONTROLLERSHASBEENEXPANDEDPIDCONTROLFUNCTION,ANDTHEEXCELLENTPERFORMANCEOFTHEPLCPLCCONTROLOFTHETEMPERATURECONTROLSYSTEMOFECONOMICPERFORMANCEISSTABLEANDCONVENIENTMAINTENANCEBASEDONTHEDESIGNOFPROGRAMMABLECONTROLLER,THECONTROLSYSTEMOFHEATTREATMENTFURNACETEMPERATUREBYUSEOFMITSUBISHIFX2NTHEPLCTEMPERATURECONTROLSYSTEM,INTRODUCESTHEDESIGNPROCESSOFHARDWAREANDSOFTWAREANDMITSUBISHIFX2NSYSTEMBASEDONA/D,INCLUDINGTHEDESIGNOFCONVERSION,TEMPERATUREDETECTION,INTEGRALSEPARATIONPIDALGORITHMANDZERODIGITALTRIGGERCIRCUITTHEHEATINGFURNACETEMPERATURESENSORINTOVOLTAGESIGNALINTOVOLTAGESIGNAL,PLCMAINCONTROLSYSTEMWITHINTHEA/DWILLBEBROUGHTINTOTHEDIGITALQUANTITYCANBEIDENTIFIEDBYPLC,THENUNDERCONSTANTTEMPERATUREDEVIATIONSFROMTHEACTUALTEMPERATUREOFTHEEKACCORDINGTOTHEINTEGRALSEPARATIONPIDCONTROLALGORITHM,GETTHEOUTPUTCONTROLQUANTITYOFUK,OUTPUTVALUEAFTERD/ACONVERSIONFROMANALOGOUTPUTVOLTAGEREGULATIONATBOTHENDSOFTHERESISTANCEWIREHEATINGFURNACE,VOLTAGE,TEMPERATUREOFTHETEMPERATUREOFTHEHEATINGFURNACETOACHIEVETHETARGETVALUEKEYWORDSPLC,TEMPERATURECONTROLSYSTEM,PID

簡(jiǎn)介：復(fù)旦大學(xué)博士學(xué)位論文加拿大一枝黃花的入侵生物學(xué)研究姓名馬淼申請(qǐng)學(xué)位級(jí)別博士專(zhuān)業(yè)生態(tài)學(xué)指導(dǎo)教師李博20030429DEFOLIATIONWITHFOURPATTERNSCFNRESPECTIVELYINCREASETHEBIOMASSOFRHIZOMEANDWHOLEPLANTBY54％AND58％，110％AND87％，54％AND37％，65％AND65％．100％INTENSITYOFDEFOLIATIONSIGNIFICANTLYDEPRESSEDGROWTHOFTHEPLANT。SINCETHEPOPULATIONEXPANSIONOFTHEGOLDENROD，TOSOMEEXTENT，DEPENDSONITSCLONALGROWTH，25％INTENSITYOFDEFOLIATION，ESPECIALLYATHIGHSOILFERTILITYLEVEL，ISFAVORABLETOITSPOPULATIONGROWTH．CHANGEINSTOMATALCONDUCTANCECANPARTLYEXPLAINTHEEFFECTSOFDEFOLIATIONONNETPHOTOSYNTHETICRATE．ANDTHEDAMAGEDPLANTSMAYBEINDUCEDTOUSEAGREATERPROPORTIONOFTHEABSORBEDLIGHTENERGYFORPHOTOSYNTHESISASARESULTOFALTEREDCARBOHYDRATESOURCESINKRELATIONSHIPS．THUS，SUITABLEDENSITYOFNATURALENEMYPOPULATIONSHOULDBERELEASEDTOEFFECTIVELYCONTROLTHEINVADER．2．GENETICDIVERSITYOF顯CANADENSISWASINVESTIGATEDBYISSRMARKER．SAMPLESWERECOLLECTEDFROMYANGPUSECTIONANDCHONGMINGCOUNTYINSHANGHAI，NINGBO，SUZHOUANDWUHAN．THEEXPERIMENTSHOWEDTHATTHEREWASCONSIDERABLEGENETICVARIATIONINTHISSPECIES，PERCENTAGEOFPOLYMORPHICBANDSFPPBWAS79．22．LEVELSOFPOLYMORPHISMATPOPULATIONLEVELWITHPPBRANGEDFROM46．75TO57．14．THEGENETICIDENTITYWASHIGH0．91，BUTTHEGENETICSTRUCTUREOFEACHPOPULATIONSEEMEDINDEPENDENT．RESULTSOFTHEAMONGPOPULATIONANALYSISSHOWEDTHATTHEMAJORITYOFGENETICVARIATION77．02％RESIDEDWITHINPOPULATION，ANDONLYASMALLAMOUNTOFVARIATION22．98％1WASPRESENTAMONGPOPULATIONSGST2O．2298．THESEXUALANDASEXUALREPRODUCTIONHABITSOFTHEPLANTAREATTRIBUTABLETOTHELOWLEVELOFGENETICDIFFERENTIATIONAMONGPOPULATIONSANDTHEHIGHLEVELOFDIVERSITYWITHINPOPULATIONS．ITSHIGHADAPTATIONTODISTURBANCEEVENTSANDNOVELENVIRONMENTSMAYBEPARTIALLYDUETOITSHIGHLEVELOFGENETICDIVERSITY．3．RHIZOMESYSTEMOFSCANADENS捃ISOFTENAFFECTEDBYSOILDISTURBANCE．ANDTHETRANSPLANTINGOFTREESBETWEENAREASOFTENLEADSTOACCIDENTINTRODUCTIONSOFRHIZOMEFRAGMENTSOFTHESPECIES．WESIMULATEDFATESOFTHERHIZOMEFRAGMENTSAFTERACCIDENTINTRODUCTIONUNDERDIFFERENTLIGHTCONDITIONS，INDIFFERENTSOILTYPES，WITHDIFFERENTRHIZOMELENGTHANDDIFFERENTPLANTINGDEPTH．THERHIZOMESPROUTINGANDSEEDLINGGROWTHWEREINVESTIGATED．THERESULTSSHOWEDTHATTHESUCCESSFULINVASIONOFSCANADENS括CANBEPARTLYATTRIBUTABLETOITSHIGHADAPTIVECAPACITYTOLLAWENVIRONMENTS，ANDHIGHTOLERANCETOENVIRONMENTALSⅡESSESE．G．，PLOWORDUMP．HIGHINTENSITYOFSUNLIGHTWASFAVORABLETOPOPULATIONESTABLISHMENTOFTHEPLANT．THESPROUTINGPERCENTAGEOFITSRHIZOMESWASRELATIVELYHIGH，ANDUPONEMERGENCE，THEPLANTSHOWEDLOWMORTALITY．THEINVASIVENESSOFTHESPECIESISVERYHIGHASFARAS5

簡(jiǎn)介：學(xué)校代碼學(xué)號(hào)2006020361分類(lèi)號(hào)密級(jí)本科畢業(yè)論文（設(shè)計(jì)）五彩繽紛的世界五彩繽紛的世界淺談辦公空間色彩搭配的合理性淺談辦公空間色彩搭配的合理性學(xué)院、系藝術(shù)設(shè)計(jì)系專(zhuān)業(yè)名稱(chēng)環(huán)境藝術(shù)設(shè)計(jì)年級(jí)2006級(jí)學(xué)生姓名馮薌伊指導(dǎo)教師王珊珊2009年3月20日ABSTRACTWELIVEINTHISSPACE,ISACOLOROFTHEWORLD,THEWORLDISCONSTITUTEDBYTHECOLOR,NOCOLORTHEREWOULDBENOCOLORFULWORLD,MANHASADEEPCOLOROFTHEWORLDSNOSTALGICANDFEELINGSOFTHEENVIRONMENTINTHEOFFICESPACEDESIGN,SPACE,COLORENVIRONMENTEXPRESSIONISANIMPORTANTPARTOFTHEDESIGNANDEACHROOMHASITSOWNUNIQUECOLORIMPLICATION,SUCHASBLACKGIVESLONELINESS,BUTALSOTHEREISANOBLEANDDIGNIFIEDBROWNPEOPLETHINKOLDFASHIONED,BUTDIFFERENTCONCENTRATIONSOFBROWNNOTONLYFAILEDTOTHEOLDGLOOMY,BUTALSOPRODUCEASOMEWHATELEGANTBRIGHTREDPOWDERISTOOUNASSUMING,IFTHECOOLANDQUIETTUNE,ABLETOHIGHLIGHTTHEYOUNGANDLIVELYTHISWHITEYELLOWISHBROWNTOOMUCHPURER,IFANDHAPPINESSWARMHAND,CANEASILYREVEALYOUROWNELEGANTTHEREFORE,AGOODCONTROLOFCOLORINTHEAREAOFSPACE,HEATING,LIGHTING,DISTANCEANDSOTHERELATIONSHIPBETWEENCONTRASTISPARTICULARLYCRUCIALTHEUSEOFCOLOREMOTION,WARMANDCOLDCONTRAST,ANAREAOFCONFIGURATIONANDAVARIETYOFCOLORTECHNIQUESINAPLANNED,PURPOSEFULENVIRONMENTFORTHEMORALOFOFFICESPACECOLORDISPLAYTOUSERS,ANDALLOWUSERSTORECEIVETHEINFORMATIONCONVEYEDBYCOLORTOCREATEINTIMACYWITHTHECOLORENVIRONMENT,WHICHREFLECTSITSPERSONALITYANDCOMMONBUSINESSOPERATIONS,CREATINGAPLEASANTANDCOMFORTABLEOFFICESPACEKEYWORDSOFFICESPACE,COLOREXPRESSION,ENVIRONMENTALINFORMATION,SPATIALCOLOR

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簡(jiǎn)介：渤海大學(xué)本科畢業(yè)論文（設(shè)計(jì)）制約我國(guó)電子商務(wù)發(fā)展因素探討制約我國(guó)電子商務(wù)發(fā)展因素探討DISCUSSIONONFACTORSTHATRESTRICTTHEDEVELOPMENTOFCHINA’SECOMMERCE學(xué)院（系）管理學(xué)院物流管理系專(zhuān)業(yè)物流管理專(zhuān)業(yè)學(xué)號(hào)12102688學(xué)生姓名入學(xué)年度2009年9月指導(dǎo)教師完成日期2013年10月15日制約我國(guó)電子商務(wù)發(fā)展因素探討IIDISCUSSIONONFACTORSTHATRESTRICTTHEDEVELOPMENTOFCHINA’SECOMMERCEABSTRACTECOMMERCEISDEVELOPINGRAPIDLYINTHEWORLDANDHASBECOMEANEWGROWTHPOINTOFECOMMERCEDEVELOPMENT,WITHGOVERNMENTSPAYHIGHLYATTENTIONONITECOMMERCEHASMAINTAINEDATRENDOFSUSTAINEDGROWTHINCHINAANDENTEREDASTAGEOFACCELERATEDDEVELOPMENT,HOWEVERCOMPAREDWITHDEVELOPEDCOUNTRIESTHEREAREALOTOFPROBLEMSINCHINA’SECOMMERCEINORDERTOPARTICIPATEININTERNATIONALCOMPETITIONANDFOCUSONTHEFUTURE,WEMUSTCHANGESHORTTERMBEHAVIORINTHECURRENTECOMMERCEDEVELOPMENTFUNDAMENTALLY,CREATEANENVIRONMENTWHICHISCONDUCIVETOTHEGROWTHANDDEVELOPMENTOFECOMMERCE,CHOOSEAWAYWHICHISSUITEDTOOURCOUNTRY’SCONDITIONTOPROMOTETHEDEVELOPMENTOFECOMMERCEDUETOTHESPECIALSITUATIONINCHINA,THEDEVELOPMENTOFECOMMERCEINCHINAISBOUNDTOENCOUNTEROBSTACLESMUCHGREATERTHANINDEVELOPEDCOUNTRIES,SUCHASTHEMANYASPECTSOFECOMMERCEINFRASTRUCTURE,MARKETENVIRONMENT,POLICIESANDLEGALREQUIREMENTSSTILLCAN’TMEETTHEREQUIREMENTOFTHEDEVELOPMENTOFECOMMERCEHOWEVER,WHETHERITISATALLLEVELSOFGOVERNMENTINCHINAORCHINA’SENTERPRISES,BOTHOFTHEMHASREACHACONSENSUSECOMMERCEISAFUNDAMENTALCHOICETOIMPROVECHINASENTERPRISESADAPTTOTHEMARKETCAPACITYANDINTERNATIONALCOMPETITIVENESS,ALSOITISANIMPORTANTOPPORTUNITYTOSHORTENTHEECONOMICDEVELOPMENTGAPBETWEENCHINAANDDEVELOPEDCOUNTRIESWITHTHERAPIDDEVELOPMENTOFGLOBALECOMMERCE,CHINASECOMMERCEISFACINGOPPORTUNITIESANDCHALLENGES,THISPAPERDESCRIBESTHECURRENTDEVELOPMENTSTATUSOFECOMMERCEISSUES,POINTINGOUTTHATTHEEXISTINGCONSTRAINTSOFCHINASECOMMERCE,LOOKINGFORECOMMERCEDEVELOPMENTINLINEWITHCHINASNATIONALCONDITIONSCOUNTERMEASURESKEYWORDSELECTRONICCOMMERCE；RESTRAININGFACTOR；IMPROVINGMEASURE

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