黑龙江（汉族）民歌衍变过程探析——对黑龙江、河北（汉族）民歌的比较

黑龙江汉族民歌的衍变历经了数百年的岁月沧桑，它与民族迁徙、人口变迁以及文化传统等存在着极为密切的联系。通过对黑龙江民歌与河北、山东、河南、山西民歌进行比较，表明黑龙江民歌与河北民歌之间存在着较近的亲缘关系。因此，文章试图在对较有代表性的几首黑龙江与河北民歌比较研究的基础上进一步探究黑龙江民歌衍变的影响因素。     

R12在水平管内流动沸腾换热实验研究

本文对R12在水平管内流动沸腾换热特性作了实验研究。实验结果表明,管内流动沸腾换热与单相对流换热一样,存在热进口效应,国外早期的实验数据由于未能考虑热进口效应而偏大。实验结果还表明,水平流动沸腾周向不均匀换热主要受流动结构影响;截面平均换热系数则与质量流速、热流密度、质量干度和蒸发压力密切相关。分析实验数据证实,流动沸腾换热是由气泡产生而引起的流动充分发展核态沸腾和双相对流蒸发两部分组成的。本文的实验数据与国外已有的换热关系式能较好吻合。     

《金属材料与热处理》教法探究

对如何在《金属材料与热处理》课堂教学中培养提高学生的学习能力,从动力、基础及主要环节与关键问题等方面作了粗浅的研究与探讨。     

不同添加剂预混料对哺乳仔猪生产性能的影响

以窝为单位将 70窝哺乳仔猪随机分为 7组 ,设 1个对照组 (试验I组 ) ,6个试验组。试验组分别添加 2 0 0mg/kg派富 (含芽胞杆菌等复合微生态制剂 ) (Ⅱ )、1%的甲酸吡啶铬 2 0 0mg/kg(Ⅲ )、2 0mg/kg泰乐菌素 (Ⅳ )、1%中药免疫增强剂 (黄芪、远智等复合中草药 ) (Ⅴ )、1%的益康XP(酵母培养物 ) (Ⅵ )以及 2 0mg/kg的硝呋烯宗 (Ⅶ )。经过 15d的试验 ,其结果表明 :试验组较对照组提高日增重 11.37% - 34.12 % ,其中Ⅴ、Ⅵ组达到显著水平 (p <0 .0 5 ) ;提高采食量 1.5 9% - 12 .30 % ;降低饲料增重比 8.4 % - 2 0 .2 0 % ;降低仔猪腹泻频次 10 .34- 31.0 3%。经无菌粪样检验 ,试验各组大肠杆菌、沙门氏菌、葡萄球菌数均低于对照组 ,差异不显著 (p >0 .0 5 ) ;而乳酸杆菌、双岐杆菌均高于对照组 ,差异不显著 (p >0 .0 5 )。经部分血液指标分析 ,试验各组的血液各项理化指标均在正常范围内 ,且各组间差异不显著 (p >0 .0 5 )。     

美、德终身教育现状比较研究

美、德两国都先后通过教育法案来促进和保障国家终身教育的开展,并利用公立和私立院校为民众提供多样的终身教育服务;两国终身教育体系在资金来源、办学机构、管理等及对终身教育概念的理解等方面又有明显差异。     

现代广告对体育产业发展的影响

广告作为一种特殊的时代文明,与体育有着不解之缘,并在体育向产业化过渡的过程中发挥了巨大的推动作用。对广告与我国体育产业的关系进行了探讨,初步得出以下结论:广告促进了体育市场的发育、促进了体育产业体系的完善、促进了体育产业的规范化。但整体来讲我国体育产业尚未充分运用广告进行全面的市场拓展与营销,还应进一步扶持与规范。     

设备监理制度推行中的问题探讨

随着设备监理制度的推行,为了设备监理行业得到持续科学的发展,本文从国家宏观管理体制的建立、设备监理行业的服务定位、监理企业自身角度提出了设备监理推行中存在的主要问题,对设备监理的推行和发展进行探讨.     

施工索赔机会发现的描述与求解方法

施工索赔机会发现是索赔管理的核心和关键内容,是索赔决策的瓶颈环节。分析了施工索赔机会发现的信息结构,给出了其灰描述,研究了施工索赔机会发现的两种求解方法,研究了索赔机会发现支持系统的工作机制。     

Network domains in social networking sites: expectations,meanings, and social capital

This paper examines why the use of social networking sites (SNSs) leads to different results in cultivating bridging and bonding social capital for different groups of people. Based on in-depth interviews of 45 university students in Hong Kong, I find that Mainland Chinese students studying in Hong Kong actively use SNSs for seeking practical information about offline matters, and they obtain substantial enacted support from other Mainland students of the same university through SNS use. As a result, they accumulate both bridging and bonding social capital. Local Hong Kong students, however, use SNSs mainly for social information seeking and are only able to accrue limited bridging social capital through SNS use. Drawing on the theory of network domains, I argue that the different offline network structures in which students are located – namely, homogeneous and closed networks versus heterogeneous and open networks – explain this difference. Students with closed offline networks have defined expectations of online ties; they think of their online activities as practical and leading to real changes in their status among peers. Those with open networks have indefinite expectations of their online audience; thus, they interpret online activities differently, thinking of them as recreational, and they are playful in their online behaviour. These different outcomes of online activities consequently lead to diverse results in social capital accrual.     

Embodied versus Disembodied Information: How Online Artifacts Influence Offline Interpersonal Interactions

This article examines how the sheer volume of personal information recorded and searchable online (online artifacts) has transformed the situated activity system central to Goffman's dramaturgical theories. In‐depth interviews reveal that individuals believe disembodied information based on online artifacts is a more accurate representation of others than embodied information from spatially and temporally bounded face‐to‐face (FTF) processes because they represent how others have behaved over time and are attested by their online contacts. However, the n‐adic structure of online interaction leads to mismatched expectations about whether disembodied information is taken into account during FTF encounters, and consequently can result in embarrassment.