利用杜邦分析法进行财务综合分析

单独任何一类财务指标,都不能全面评价企业财务状况和经营成果,只有系统、综合地分析各种财务指标,才能对企业的财务状况作出全面、合理、正确的评价。通过财务综合分析法可以评价企业的财务状况和经营成果,杜邦分析法就是其中的一种,文章根据杜邦分析法的优缺点对其进行改进,并用改进的方法对保利房地产企业进行财务综合分析。     

Real time search on the web: Queries,topics, and economic value

Real time search is an increasingly important area of information seeking on the Web. In this research, we analyze 1,005,296 user interactions with a real time search engine over a 190 day period. Using query log analysis, we investigate searching behavior, categorize search topics, and measure the economic value of this real time search stream. We examine aggregate usage of the search engine, including number of users, queries, and terms. We then classify queries into subject categories using the Google Directory topical hierarchy. We next estimate the economic value of the real time search traffic using the Google AdWords keyword advertising platform. Results shows that 30% of the queries were unique (used only once in the entire dataset), which is low compared to traditional Web searching. Also, 60% of the search traffic comes from the search engine’s application program interface, indicating that real time search is heavily leveraged by other applications. There are many repeated queries over time via these application program interfaces, perhaps indicating both long term interest in a topic and the polling nature of real time queries. Concerning search topics, the most used terms dealt with technology, entertainment, and politics, reflecting both the temporal nature of the queries and, perhaps, an early adopter user-based. However, 36% of the queries indicate some geographical affinity, pointing to a location-based aspect to real time search. In terms of economic value, we calculate this real time search stream to be worth approximately US $33,000,000 (US $33 M) on the online advertising market at the time of the study. We discuss the implications for search engines and content providers as real time content increasingly enters the main stream as an information source.     

房地产投资风险及其对策探析

本文从房地产投资风险的基本概念着手,结合房地产投资风险的特征,分析房地产投资风险因素及房地产投资风险管理的四大策略,通过各项风险管理对策的有效实施,达到较好的风险管理效果。     

房地产估价中可比实例选择研究

为了提高房地产估价中可比实例的选择精度,将灰色关联理论引入到市场比较法,通过计算特征因素与房地产价格关联度的大小,确定特征因素的权重,利用模糊贴近度的大小选择出市场比较法中的可比实例,最后通过一个应用实例说明该方法的实用性。     

无穷等比数列在房地产估价中的广泛应用

在房地产估价中,无穷等比数列的应用更为广泛,掌握了无穷等比数列这一数学工具,对房地产估价技术的开展至关重要。     

基于模糊聚类的市场比较法改进研究

市场比较法是目前房地产界估价、定价最常用的方法之一,但在实际应用当中,传统的市场比较法在确定各特征因素修正系数和选取可比实例时,多是根据估价人员的主观判断,因而影响估价结果的准确性。本文通过分析市场比较法运用过程中经常遇到的问题,根据模糊数学理论,引入模糊聚类分析和隶属度、贴近度的概念,并考虑不同特征因素对价格影响的重要程度,而给予相应的权重,改进了传统的市场比较法,从而提高了市场比较法估价结果的准确性。     

房地产市场及其细分的调控重点区域划分理论与实证——以中国35个大中城市为例

2010年以来,在国家严厉的、密集的调控政策下,各大城市房地产市场运行绩效表现出差异性,但也显示地方反弹的压力。因而,如何做到调控精准化、差别化和决策科学化需要房地产重点监控区域划分的理论与方法研究。本文以房价与地价波动及其关系的表现形式为依据,提出工作假说——房价地价关系与全国基本一致的城市,其房价波动偏离全国房价波动均值的程度也较小,以此作为划分重点监控区域的标准或方法。然后利用全国及35个大中城市的房屋销售价格指数与土地交易价格指数,通过Granger因果关系检验得出,与全国层面房价地价关系短期内双向互动影响一致的城市有26个;运用均值、方差与离散系数等描述性统计得出,与全国层面房价地价关系的短期效应一致的城市,2010年以来其新建住宅价格指数和二手住宅价格指数离散系数普遍小于均值,而海口、杭州、深圳等城市应成为房地产调控政策实施监控的重点;单个样本t检验表明,新建住宅市场与二手房市场的差异较大,而后者与全国层面房价地价关系的短期效应一致的城市较少,今后国家宏观调控政策应重点关注二手房市场。总体而言,把握各城市与全国层面房价地价关系的短期效应一致性以及差异性,是房地产分区域、分市场、分类差别化与精准化调控体系的基础。     

为有源头活水来“三贴近”采写心得

用贴近实际、贴近生活、贴近群众的“三贴近”要求指导记者的新闻采访工作，既是临沧日报社贯彻落实市委“解放思想，为民办报”要求的具体体现，也是新闻工作者转变作风、转变文风，进一步提高新闻报道质量，提高舆论引导和服务水平的重要保障。     

Computing the topology of an arrangement of implicitly defined real algebraic plane curves

We introduce a new algebraic approach dealing with the problem of computing the topology of an arrangement of a finite set of real algebraic plane curves presented implicitly. The main achievement of the presented method is a complete avoidance of irrational numbers that appear when using the sweeping method in the classical way for solving the problem at hand. Therefore, it is worth mentioning that the efficiency of the proposed method is only assured for low-degree curves.     

永真公式形成系统初探

永真公式也称重言式,是从真值函项角度划分出来一种命题逻辑公式。其形成系统是有规律的,即可以传统逻辑方阵表记的复合命题和简单命题之间的真假制约关系为基础,推导出有规律性的一系列永真公式。