项目融资中的负债期限结构

在债券平均到期期限的基础上 ,提出现金流的弹性概念 ,并据此探讨了项目融资结构中负债期限结构问题 .研究结果表明 ,在项目融资结构中 ,负债期限结构与负债容量密切相关 .项目负债比率低 ,应倾向于长期负债 ;相反 ,应倾向于短期负债     

地衣芽孢杆菌制剂对蛋鸡产蛋率的影响

在本试验中,采用单因子试验设计方案,在基础日粮中添加60克/吨的地衣芽孢杆菌制剂喂养,研究在日粮中添加地衣芽孢杆菌制剂对蛋鸡产蛋率的影响。结果表明:地衣芽孢杆菌制剂能明显提高鸡的产蛋率,降低料蛋比,提高养殖场的经济效益。     

The reality of virtual worlds: pros and cons of their application to foreign language teaching

This article presents our experience of testing the OpenSim platform as a tool in teaching French to 108 tourism students at Universidad Rey Juan Carlos (Madrid, Spain). The article begins with some theoretical reflections on the behaviour of the student when using a virtual platform by means of an avatar, and with our observations of how this doubling of identity is actually the greatest asset of virtual worlds when we intend to apply them to teaching (1. Introduction). Then we move on to present our goals and method of work (2. Aims and methodology) and to analyse the development of the virtual space or sim, setting out the teaching strategies that were employed in each of the islands we created, and which correspond to reading comprehension, listening comprehension and written expression (3. Metaverse design). In order to assess the language learning results, we also devised tests throughout the experiment, which were repeated one month later. The assessment shows that the process of language acquisition is positive (4. Results analysis). Finally, we demonstrate that the rise of virtual worlds has been backed up by psycholinguistic factors, but at the same time their applicability and sustainability depend on technical aspects and very especially on theoretical and pedagogical tenets which are still to be drawn up (5. Conclusions).     

AsCl_3在9mol·L~(-1)盐酸一苯和水一苯相中分配比的测定

本文介绍了笔者设计的测定AsCL_3在9mol·L~(-1)盐酸—苯相的分配比(D_1)和在水—苯相中的分配比(D_2)的简便方法。试验测知,在19℃时,D_1为10.82,D2为0.0180。苯对9mol·L~(-1)盐酸中的As(Ⅲ)的萃取率为91.5％,水对苯相的As(Ⅲ)的反萃取率为98.2％(等体积一次萃取)。     

房价对我国居民商品房购买能力的影响

本文以北京、上海、广州和深圳的商品房数据信息为基础对当前我国居民的购买能力进行实证研究。得出我国目前房价家庭收入比已经超过国际警戒线近,高房价严重制约我国居民商品房购买能力。本文对虚高房价的形成原因进行深入探讨,认为政府应该切实为大众提供及时准确商品房市场信息,增强政策的可信性帮助购买者做出合理预期,这样才有助于稳定房价。     

高校图书馆图书流通效用的建模设计

图书馆是文献信息传播中心。作为信息的重要载体之一的馆藏图书,在读者利用以后所产生的流通效用,是综合评价、检验藏书资源建设的数量、质量及结构体系的最终依据,也是预测未来潜在性需要,修改藏书发展计划的重要依据。本文将改变图书流通效用分析的定性分析方式,改定性分析为定量分析,通过图书流通效用指标分析,提出一种数学模型。     

基于熵指数和行业集中度的我国高技术产业集聚度研究

以1995-2006年我国高技术产业的省际面板数据为基础,运用熵指数和行业集中度对我国高技术产业总体及其各行业的集聚度进行精确的度量。结果表明,我国高技术产业的集聚度越来越高,产业地方专业化程度不断加强。高技术产业集聚与经济发展有较强的相关性,但由于高技术产业集聚梯次发展的特点也加剧了区域经济发展的不均衡。因此,要引导产业资源的优化配置,建立合理的产业分工和协作体系,形成优势互补的区域合作机制。     

重大灾难性事件谣言的传播与应对研究——以“抢盐”谣言为例

日本福岛核电站的核泄漏事件使全国陷入一片恐慌之中,许多谣言相继产生。2011年3月16日,我国爆发食盐抢购风潮,这场风潮是由关于核辐射将污染我国海域和食盐可以防辐射的谣言导致的。本文以我国"抢盐"谣言为研究对象,对"抢盐"谣言传播的始末进行梳理,分析此次"抢盐"谣言的传播特点,并探讨预防和应对重大灾难性事件谣言的方法。     

Clinicopathological spectrum of non-alcoholic fatty liver disease among patients in Kerala

Non-alcoholic fatty liver disease and its more aggressive form, non-alcoholic steatohepatitis are entities that are becoming more and more interesting to the medical community in general. A total of 93 Non-alcoholic fatty liver disease patients (64 male and 29 female) within the age range between 28 to 63 years were studied. All of them showed elevated alanine aminotransferase level (104.07 ± 56.04). Aspartate aminotransferase level (58.13 ± 31.96) was elevated more than its normal level in 82% cases and AST to ALT ratio was found 0.59 ± 0.26. Predisposing factors were diabetes mellitus (37%), obesity (13%) and hyperlipidemia (41%). In addition, 32% of the subjects were overweight.18% of the patients had elevated serum bilirubin. Our findings recommend a lower cutoff value than suggested by the World Health Organization for overweight and obesity among this racial-ethnic group.     

科技评价中专家权重赋值优化研究

为了对科技评价中专家权重赋值进行优化.首先构建指标体系综合评价方法的分类体系,然后利用加法平均和证据理论对不同专家的权重赋值进行合成进而进行评价,并将评价结果按20:60:20的比例进行分级.接着比较不同专家分级评价结果与加法平均及证据理论分级结果的一致性,计算每个专家的灵敏度,可以找出权重赋值意见分歧最大的专家,从而提供了一种专家修正自己权重的定量比较方法.研究发现,证据理论合成能够充分尊重每个专家的意见,但在专家们对某个指标权重打分都比较低的情况下,该指标权重合成的结果可能极小甚至为0,因此适用于一些不太成熟的科技评价或者用于新生事物的评价.对于一般的科技评价宜用加法平均进行合成,然后再进行灵敏度分析进而进行专家权重调整.