在分析Markowitz证券组合投资模型最优化解法的基础上，给出了求解不允许卖空证券组合投资模型的原始-对偶多项式内点算法；不同于传统牛顿法的迭代方向，借助一种新的工具寻找搜索方向，并且该算法具有多项式复杂性；用文章给出的算法对一个具体的投资实例进行计算求解，数值结果显示该算法是可行有效的。

本文讨论多元函数方向极限、重极限与累次极限三者之间的相互关系.给出了重极限与累次极限的五种关系;给出了方向极限、重极限与累次极限的三种关系.并对相应情形进行了讨论.

使用单位根检验与协整理论分析了我国卫生投入、居民健康水平和经济增长之间的关系.采用预期寿命、新生儿死亡率和平均受教育年限作为我国居民健康水平的代理变量,分析它与我国GDP增长之间的关系并得到了相应的回归模型.基于2014年全国31个省区市的地区生产总值、年末从业人员数与卫生投入的数据,对我国区域卫生投入进行了统计检验,实证分析了区域卫生投入对其经济增长的贡献.发现卫生投入对于提高当地经济增长有显著效果且具有明显的区域特征.内生经济增长模型回归结果显示,卫生投入的增多,能促进居民健康水平的提高,进而促进经济增长.

[目的]从种植、销售、企业、科研等方面对广东省中药产业进行综合分析,与全国和相关省份进行比较,评价广东省自2006年实施中医药强省战略后中药产业的发展状况,并提出建议.[方法]摘取《中国农村统计年鉴》《药品流通行业运行统计分析报告》70家中药上市公司2018年年报、国家统计局官网及国家药品监督管理局官网等相关资料,对2006-2018年广东省中药产业政策、种植、销售、企业、科研进行分析.[结果]广东省在中药种植、销售、企业数等方面都有了较大的发展,其中药材质量、产业结构、科研方面仍相对不足.[结论]广东省在中医药强省建设中,对中药产业的发展仍需提升种植规范化、中药材质量,建立现代化产业体系,加大科研投入,进一步增强广东中药产业竞争力.

基于协整理论分析我国中医药卫生费用投入与经济增长的关系,应用柯布道格拉斯生产函数解释其影响机制并建立回归模型.以1987-2013年国内生产总值与中医药卫生费用投入的年度数据进行统计检验.结果 显示中医药卫生费用与经济增长之间存在长期均衡的正相关关系,其影响机制表现为中医药费用投入的增加提高了劳动力工作时长进而促进经济增长.

研究PM2.5的影响因素,基于分类回归树(CART)模型挖掘指标间的交互项和重要性,构建合理的指标体系.应用主成分分析消除解释变量间的共线性问题,建立回归模型,通过引入广义变异系数检验模型的精度.研究表明,SO2、NO2、CO等污染物及其交互作用是影响PM2.5的重要因素,气象指标与PM2.5之间有正相关关系,经济等指标对PM2.5的影响有待进一步研讨.

为探知BMI对各运动指标的影响,并对大学生体质变化趋势进行预测,跟踪采集某学院4年来20092名学生体测数据,首先引入拉以达法则剔除异常值,然后利用相关分析计量体能指标间的相关系数,用回归树模型对相关度进行了修正,最后基于均值GM(1,1)模型对于各体质指标进行了预测.结果显示男生BMI对引体向上影响最高,女生BMI对仰卧起坐影响最高,另模型中大多数指标预测平均相对误差小于1％,精度较高.

分析影响评价结果的因素是评价类问题的核心内容之一,相关度是因素选取的重要标准,本文结合广东省一流高职院校的评价结果,建立了广义灰色关联度模型,将因素间的不确定关系白化,并通过构建TOPSIS综合评价模型耦合了评价结果.实证结果表明,此类模型可以作为理想的指标因素分析模型,结果可为相关教育部门决策提供参考.

研究高职学生数学学习状况,揭示影响高职学生数学学习兴趣的因素及作用机制,通过问卷调查采集学生数学学习行为数据,利用决策树模型探索变量的重要性,并构建了合理的解释变量体系,运用累积Logistic回归模型对影响因素进行了实证分析.结果表明:性别等因素对高职学生数学学习兴趣无显著影响,而生源类别、教师、学生学习习惯等因素有显著性影响.

在分析泰勒公式的基础上,分别给出了n元函数带有拉格朗日型余项与带有佩亚诺型余项的泰勒公式,及多元函数带有拉格朗日型余项与带有佩亚诺型余项的麦克劳林公式.同时得到了应用n元函数的泰勒公式求多元函数极限的方法,并分析了该方法在求多元函数极限问题时的适用情形与条件.具体实例显示本文给出的方法是可行有效的.

Based on the demand function, Least Squares and Goldfeld Quandt test were applied in this paper to analyze the cross section data about GDP and financial investment in traditional Chinese medicine in 31 provinces, municipalities and autonomous regions of China in 2013.The relation between health expenditures of traditional Chinese medicine and economic growth in China was discussed. Meanwhile, data was screened into eastern, central and western regions in to order to conduct the analysis of variance. It is found that financial investment of traditional Chinese medicine show a significantly positive correlation with economic growth and was of distinguishing regional characteristics. The income elasticity of health service demand for traditional Chinese medicine was over one, which indicated the insufficiency of government financial investment in traditional Chinese medicine. As for each province, municipality or autonomous region, 1% increase in GDP could bring in 1.41% increase in financial investment for traditional Chinese medicine. The growth rate of financial investment in traditional Chinese medicine health was faster than that of GDP.

In this paper, by using correlation and regression analysis,To study the calendar year GDP change relationship betweenthe financial input of TCM, labor input, and the fixed assets investment,the results showed thatfinancial investment of TCM to economic growth contribution rate is 0.214583, Medical institutions of TCM practitioners to total contribution rate of economic growth is 0.119436, Class of TCM hospital, the contribution rate of total assets for growth of 0.495387.

In this paper,based on Markowitz portfolio investment model,applying the admissible error of expectation and variance,we study the portfolio investment model under uncertainty conditions; discuss two frontiers of the portfolio according the upper bound and lower bound of admissible error; get the optimal approach to the portfolio investment model with admissible error and its theorems. At last,we give a numerical example.

本文以公共品选择理论为基础,采用价格理论的经济分析方法对医疗保健市场中的医疗商品与服务进行研究,通过选取我国1980-2009年的卫生统计数据进行分析与比较,研究了看病难与看病贵的经济机理与原因,分析了医疗商品与服务的供给与需求状况。在此基础上,我们主张实行比较注重成本节约与提高医疗服务质量的利润导向型的商业化市场医疗机制。

The influence factors for service life of electrolytic cell were analyzed and the measures for extending the service life of electrolytic cell were proposed based on the production practices,the good results were gained.

为了兴建大学城校区,广州各高校纷纷向银行借下巨额贷款,至今已纷纷进入还贷高峰期,能否按期还本付息是各高校普遍关心的话题。本文对广州某高校的大学城贷款风险进行了实证分析,最后也试图提出该校防范大学城贷款风险的措施。

In this paper, based on the Resource Endowment Theory, we discussed the relation between specialized economy and resource endowment, established the economic model of Guangdong and Hongkong. At the same time, we studied the foreground of economic collaborate of Guangdong and Hongkong by the specialized economy model. In addition we obtained the optimal and solution to develop the collaborate economic advantage model of Guangdong and Hongkong.

以报酬递增为前提,对医院"医药分业"模式进行了实证经济分析,提出了一个新的经济学分析框架。刻画了医院医疗服务职能与药品经营职能专业化的分工经济,运用超边际分析方法求解医院职能分工的一般均衡结构,认为医院职能专业化产生的分工经济是医院产业化发展的基本动力,降低交易费用是医院产业化兴起的基本经济条件。

In this paper,based on the characters of nonnegative Mmatrix,we give a new proof to Woods Theorem and give a corollary on this theorem.Applying Z transformation we make a solution to discrete and dynemic Input-Output model,discuss the application of dynamic Input-Output model in calculation for economy growth rate and output design of the economy system,and we make empirical analysis for the economy forecasting and optimal control of this model with a practical example.

we study the three-tertiary hospitals in Guangzhou area with AHP method,make a scale evaluation model of these hospitals,and present a method which can be used to determine the priority order of the hospitals' evaluation in the 15 three-tertiary hospitals.At the same time,we make a empirical analysis with a evaluation model compared by these 15 three-tertiary hospitals and 12 technical criterions,and the priority order of 15 three-tertiary hospitals' scale evaluation is given using 2004 data in Guangdong health statistical yearbook.