南海北部早第三纪流沙港组孢粉组合

In the northern part of South China Sea, including Tonkin Gulf, Hainan lsland, Leizhon Peninsula and some basin of Guangdong  Province,  Paleogene  deposits  are composed of three formations: the Weizhon, the Liushagang and the Changliu forma- tions arranged in descending order.  The paper on the palynoflora of the Weizhon Formation (early and middle Oligocene) is in press[2].  This paper deals only with the palynoflora of the Liushagang Formation, with may be divided into four main stages:       The first stage is represented by Monocolpollenites tranquillus and Crassoretitri- letes sp., assigned to early Eocene The second stage is characterized by Salixipollenites, Momipites triletipollenites and Operculumpollis.  Its age is middle Eocene.  The third stage is dominated by some species of Quercoidites  and  Ulmipollenites  and  also characterized by the presence of Platycaryapollenites  and Prominangularia  dogying- ensis, This sporo-pollen assemblage suggests a late Eocene in age.  The fouth stage is marked by profusion of some alga of brockish water, such as Rugasphera corrugia, Granodiscus gronulatus and some pollen types  of  Liquidambarpollenites   minutus, Multiporopollenites puctatus and Tricolporopollenites minutus.  The age of the last stage is assigned to early oliocene.       In generaly, the palynoflora of the Liushagang Formation is quite different from that of the Weizhou Formation.  The main types of spores and pollen are common with those found in Europe and North America of the same age, while the Weizhou Formation has many elements common both in this region and Borneo.       During Eocene and early Oligocene this area was  of continental  phase with brackish basins. At the beginning the climate was rather moist and hot, but then itbecame moist and warmtemperate.     

How does collaboration affect researchers’ positions in co-authorship networks?

Collaboration usually has a positive effect on researchers’ productivity: researchers have become increasingly collaborative, according to recent studies. Numerous studies have focused on enhancing research collaboration by recommendation technology and measuring the influence of researchers. However, few studies have investigated the effect of collaboration on the position of a researcher in the research social network. In this paper, we explore the relationships between collaboration and influence by social analytical methods, which are pertinent to analyzing the network structure and individual traits. We evaluate three aspects of the researchers’ influence: friendship paradox validation, social circle, and structure of a researcher's ego network. Furthermore, the ”six degrees of Bacon number” theory, generalized friendship paradox, and triadic closure theory are introduced to support our analysis. Experimental results show that collaboration can help researchers increase their influence to some extent.     

Bivariate grid-connection speed control of hydraulic wind turbines

The requirement for An electrical grid-connected wind turbine is that the synchronous generator speed is stable within a required speed range for the electrical grid. In this paper, a hydraulic wind turbine (HWT) system is considered, and the working principle and working conditions of the HWT are introduced. A novel speed control method is proposed in this paper, using both a proportional flow control valve and a variable displacement motor, which are adjusted in combination to control the speed of the HWT. By establishing a state space model of the HWT and solving the nonlinear system with a feedback linearization method, a bivariate tracking controller is constructed to realize accurate speed control under fluctuating wind speed and the load disturbance conditions. The effectiveness of the control method is verified by simulation, but experimental results highlight problems with the method. The theoretical controller is simplified to reduce sensitivity to measurement noise and modeling error. The control effect has been improved to some extent, but it is limited. Based on these results, combined with the sliding mode variable structure control method and the feedback linearization method to solve the problem of measurement noise and modeling error, and the effectiveness of the control law is finally verified experimentally. It lays a theoretical foundation for the practical application of HWT.     

南京市高职院校乒乓球选项课现状调查及对策分析

通过文献资料法、专家访谈法、调查问卷法、数理统计法、逻辑分析法,对南京市部分高职院校的乒乓球选项课开展情况进行了调查和研究,并提出建设性建议。     

图书馆特色建设探讨

图书馆特色是指图书馆在长期办馆过程中积淀成的比较持久稳定的发展方式和被社会公认的优良的管理理念、服务方式、资源及文化建设等方面特征的总和。图书馆应通过科学准确定位,创新办馆理念,建设特色鲜明的馆藏,延揽卓尔不群的馆员,营造完美、高尚的文化氛围及提供优质多样的服务6个建设路径来完成特色化建设。     

数字典藏在E-learning中的应用

数字典藏平台可以成为一个非常丰富与完整的数字学习环境,所具有的典藏功能、展示功能、教育功能和研究功能有助于营造一个好的E-learning环境。数字典藏应用于E-learning是数字典藏再利用一个可行的发展方向,有助于提高数字典藏资源的价值。     

长株潭区域信息资源共享体系之构建

通过对长株潭区域信息资源分布现状调研,分析该区域信息资源共享存在的不足;在此基础上,借鉴国内外区域信息资源共享经验,从共享主体、共享客体、共享模式、共享规则等方面对长株潭区域信息资源共享体系进行构建。提出以网络框架和资源框架为基础搭建共享平台,并建立相关的管理体系、资金体系、政策法规体系、人才体系以保障平台的有效运行。     

面向供应链融资的企业无风险收益合约研究

摘要：供应链融资服务是一种新型的银行金融产品服务,是实现中小企业资金市场化的有效切入点。本文根据供应链融资运作中企业间的合作关系,建立了不同主体无风险合约模型。基于此模型,研究了银行和企业对贷款额度与利率的承受范围,分析了供应链融资参与主体间的无风险合约达成条件,提出了企业努力水平与贷款利率、贷款额度之间的激励关系。研究表明,供应链项目未来收益作为银行还款来源不仅与项目自然状态有关,还有与成员企业努力水平有着直接的关系,只有成员企业共同努力,才能保证供应链整体效益最大化,从而才能实现企业自身收益最大化。     

江西科技人力资源对经济增长的贡献率研究

随着知识经济时代的到来,科技人力资源成为一个国家或地区最重要的战略资源之一。该文应用柯布—道格拉斯生产函数对2001—2008年江西省科技人力资源的贡献率作了实证研究,发现在此期间江西省科技人力资源存量迅猛增长,但其贡献率仍远远低于物资资本存量的贡献率,在此基础上,提出了加大江西省科技人力资源贡献率的政策建议。     

期刊同被引的社会网络分析

利用CNKI引文数据库,选取CNKI收录的图书情报类期刊中的31种作为研究对象,使用SPSS、Ucinet和Pajek等社会统计分析软件,通过聚类分析、多维尺度分析、核心—边缘结构分析和社会网络可视化等方法进行了期刊同被引分析。结果表明：期刊大体可以归为四个族类,研究内容侧重有所不同;期刊同被引网络可以划分为由17种位于核心和14种处于边缘的结构,并实现了网络图谱的可视化展示。