林业上市公司融资效率的DEA分析——基于20家林业上市公司与吉林森工融资的视角

在资本市场中合理利用融资渠道、融资方式提高林业资源配置效率已成为消除林业发展瓶颈的关键。选择20家林业上市公司,同时以吉林森工为典型案例,通过点面结合的分析方式揭示林业上市公司存在过分依赖短期负债、融资渠道单一、融资结构不合理等问题,提出了以规范和加强林业上市公司的融资管理,拓宽融资渠道,化解金融风险,提升融资效率等对策建议。     

我国高技术硅产业发展问题与对策

高技术硅产业关系到电子信息及光伏太阳能产业的发展。通过进行计划指导下的战略性布局、建立信息共享机制、完善区域发展评价体系、整合资源、加强研发、成立国家产业工人基地等措施以及鼓励中小企业配套生产,可以培育我国硅产业国际市场竞争力。     

日本应对贸易磨擦的策略对我们的启示

随着我国产品出口的大幅度增加,贸易磨擦日益增多,对我们经济的影响也越来越大.日本过去曾面临类似的问题,他们解决贸易磨擦的一些策略值得我们借鉴.     

Multi-valued Document Classification Based on Generalized Bradley-Terry Classifiers Utilizing Accuracy Information

Due to the development of computer network, a large amount of documents are treated in many fields. The number of digital document data stored in databases is enormous, accordingly it is difficult for analysts to read all documents and classify it by hand. Therefore, it is necessary to develop the technology of automatic document classification by using computers these days. From the above needs, many classifiers with good performance have been proposed, i.e., Relevance Vector Machine （RVM） and Support Vector Machine （SVM） that are known as good binary classifiers. For multi-valued document classification problems, it is known that a multi-valued classifier by combining several binary classifiers has a good performance. In this study, the method to construct an efficient combination of binary classifiers based on improving Generalized Bradley-Terry （GBT） model, which has high extensibility, is focused. This model is an expansion of Bradley-Terry （BT） model. Though the BT model has a limitation on combination of classes, the GBT model enables us to utilize any binary classifier which classifies into two arbitrary subsets in the class set. Generally, when several binary classifiers learn from the training dataset, there would be the difference of accuracy between these binary classifiers, due to the existence of categories that cannot be easily classified. However, the conventional method of multi-valued classification by GBT binary classifiers does not take the accuracy of each classifier into consideration. To avoid this problem, a new way of multi-valued classification method by considering each classifier＇s accuracy is proposed. The purpose of this study is to construct a good multi-valued classifier by calculating the accuracy of each classifier and utilizing it as the weight. In order to verify the effectiveness of the proposed method, the simulation experiment by using newspaper articles is conducted.     

静态顶空气相色谱法测定地表水中苯系物

采用静态顶空气相色谱—氢火焰离子化检测器法（HS-GC-FID）测定地表水中8种苯系物,对其分析条件进行了优化,详细讨论了分析过程中各因素对测定结果的影响。结果发现,CP-WAX52CB极性石英毛细管柱可以实现水中苯系物的各组分完全分离,苯系物各组分线性方程的相关系数均大于0.990,方法检出限为1.6~3.5μg/L,加标回收率为93.3%~101.4%之间,相对标准偏差为2.28%~3.82%（n=6）。该方法准确、快捷、线性范围广,适用于饮用水和地表水中低浓度挥发性苯系物的测定。     

国家助学贷款商业运作模式及其功能探析

为“不让一个贫困学生失学”,1999年出台国家助学贷款政策。实施5年来,国家助学贷款政策体现出了作为资困助学主渠道的作用,同时也存在很多制度上的不足和操作上的困难,必须研究新的解决对策。一、国家助学贷款在资困助学工作中的重要作用国家助学贷款是高校资困助学的主要形式     

高等教育和科学效率评价研究综述

高等教育和科学研究的投入-产出效率评价对解决科教资源稀缺性有着重要的意义。本文通过对近年来国内外有关应用DEA方法研究高等教育、科研效率的主要研究成果进行综述,分别从评价问题层面、评价模型的改进与发展等角度进行梳理和归纳,并对其在本领域内未来的发展方向做以展望。     

行为资产定价实证研究:中国股票市场噪声交易者风险测度

本文借鉴行为金融理论在资产定价领域的成果,对国外学者的实证方法进行了理论改进和拓展,并运用上海股票市场的A、B股有关交易数据进行了实证研究,得出结论认为我国股票市场具有很高的噪声交易者风险,从而无法运用CAPM对股票进行有效定价。本文在具体实证过程中使用了相关工程技术软件和计量分析软件进行大规模的数据处理、运算和运算结果计量分析,得出了具有统计和经济意义的分析结果。     

加强宏观调控防止经济过热

今年上半年,我国GDP增长了10.9%,经济出现了增长偏快的迹象.这种快速增长是在国民经济连续几年高位运行基础上的增长,如果把握得不好,我国经济可能会出现大起大落,遭受重大损失.因此,做好今后一个时期的宏观调控工作意义重大,任务艰巨.