基于有机朗肯循环的发动机余热回收技术

通过比较8种循环工质在有机朗肯循环(ORC)系统中的热力过程,从系统性能、可靠性、环保等角度综合考虑,验证了R245fa用于ORC循环工质的优势。以康明斯某重型车用发动机为应用目标,设计了一套余热回收发电系统,通过回收增压空气、尾管废气、发动机废气的热量,用于发电。经过计算,该系统的余热回收效率为10.4%。     

Automating a framework to extract and analyse transport related social media content: The potential and the challenges

Harnessing the potential of new generation transport data and increasing public participation are high on the agenda for transport stakeholders and the broader community. The initial phase in the program of research reported here proposed a framework for mining transport-related information from social media, demonstrated and evaluated it using transport-related tweets associated with three football matches as case studies. The goal of this paper is to extend and complement the previous published studies. It reports an extended analysis of the research results, highlighting and elaborating the challenges that need to be addressed before a large-scale application of the framework can take place. The focus is specifically on the automatic harvesting of relevant, valuable information from Twitter. The results from automatically mining transport related messages in two scenarios are presented i.e. with a small-scale labelled dataset and with a large-scale dataset of 3.7 m tweets. Tweets authored by individuals that mention a need for transport, express an opinion about transport services or report an event, with respect to different transport modes, were mined. The challenges faced in automatically analysing Twitter messages, written in Twitter’s specific language, are illustrated. The results presented show a strong degree of success in the identification of transport related tweets, with similar success in identifying tweets that expressed an opinion about transport services. The identification of tweets that expressed a need for transport services or reported an event was more challenging, a finding mirrored during the human based message annotation process. Overall, the results demonstrate the potential of automatic extraction of valuable information from tweets while pointing to areas where challenges were encountered and additional research is needed. The impact of a successful solution to these challenges (thereby creating efficient harvesting systems) would be to enable travellers to participate more effectively in the improvement of transport services.     

我国未来民法典限制政府官员隐私权的宪政意义

限制政府官员的隐私权，意味着媒体权力在其私域可以得到相应的扩张。这在选任、监督以及激励政府官员上，对于人民具有重大意义；对于政府官员而言，其也并非百无一利。故人民即便是在对政府官员因其隐私权受限而可能遭受的利益减损进行相应补偿后，也仍可从中获取较大利益。我国于即将制定的民法典中规定限制政府官员隐私权的条款具有重大的宪政意义。     

Genetic mouse models for otitis media

GeneticsofOtitisMedia (OM ) :OMisaffectedbymultiplefactorsincludingeustachiantube (ET )structureandfunction ,immunestatus ,innatemucosaldefense ,geneticsusceptibility ,andpathogens .Infec tiousdiseasecanbeviewedasabattlebetweenhostsandpathogens,inwhichthecommandsareencodedinthegenomesoftherespectiveorganismsandarethenexecutedbygeneproductsincludingcomponentsoftheimmuneresponseofthehostanddrug resistancemech anismsofbacteria .Whilecliniciansmaynotgetusedtothinkingofgeneticsasafactorinthedeve…     

THE EFFECT OF EXOGENOUS SURFACTANT ON THE EUSTACHIAN TUBE FUNCTION IN THE GERBIL MODEL OF SECRETORY OTITIS MEDIA

Secretoryotitismedia (SOM )isacommondis easeandasignificantworldhealth problem .Al thoughSOMiswellrecognizedatclinicallevel,itspathogenyispoorlyknown .Theeustachiantubeservesanimportantfunc tioninequalizingpressurebetweenthemiddleearandthenasopharynx .Theeustachiantubeinthenormalstateisclosed ,butintermittentlyopensbytheactionofthetensorvelipalatiniandlevatorvelipalatinimusclesduringswallowing .Absenceofsurfactantoneustachiantubeisoneofimportantreasonsoftheirdysfunction .Thisre searchinject…     

中国传媒生产经营与管理新探

媒体的生产与经营具有独特的产业性，是不可分割的环节，它们需共同满足“媒体所有者”、“受众”、“广告商”与“媒体从业人员”的欲求，这样才能实现传媒的社会责任在相应的利益支撑下充分发挥，才能在一种制度层面实现传媒的管理创新。这是中国传媒进行生产、经营与管理创新的基点。     

沉积岩中深部隧道围岩层状破坏模型

研究发现在岩体基本力学介质中，当沉积板状（层状）岩体的结构和性状符合某些特征时，其力学机理从总体上符合板壳结构的特征。根据这一结论，建立了沉积层状结构岩体隧道围岩破坏模型。采用该模型具体分析了深部直立沉积层状岩体中的地下工程围岩在其长度远大于直立高度的情况下岩体中的层状破裂问题。并根据地下结构失稳概率分析原理，建立了直立沉积层状围岩稳定的极限状态方程。     

TM2型机车主变压器设计改进

以TM2型机车主变压器为例,从接地和绝缘材料两方面对目前我国电力机车主变压器中存在的一些问题进行了分析,并提出了相应的解决措施。     

论传播发展的八个维度

传播发展一方面受到社会整体发展水平的制约,另方面又能促进整个社会的全面进步.传播发展的内涵丰富多彩,要考察特定国家新闻传播的发展,有八个维度是必须予以关注的:相对独立的政治地位;开放多元的媒介结构;较少的报道禁忌与较大的监督空间;经济自给;媒介具有一定的公信力;从业者的职业意识和专业精神;媒介结构合理与较高的普及水平;受众信息需求的最大满足.由于传播发展是动态的历史过程,象征传播发展的具体指标和考察传播发展的维度,当然不会固定不变.     

宝马E65 MOST总线光纤传输技术及其故障分析

宝马E65轿车的MOST总线运用了光纤传输技术。本文详细介绍MOST总线光纤传输技术的特点、网络结构以及工作原理,分析系统发生故障的原因,并结合检修实例,阐述MOST总线系统的故障排除方法。