共享经济系统风险评价指标体系研究

移动互联网和移动支付技术的快速崛起,引发了中国式共享经济的发展热潮。但由于这种创新商业模式缺乏有效的金融和法律监管,其背后所蕴含的巨大风险是不容忽视的。针对现有文献缺乏共享经济定量模型的不足之处,引入AHP模型建立我国共享经济系统风险的评价指标体系,计算出各类风险的权重系数,在所有指标通过一致性检验的基础上,给出共享经济风险指标的评价排名,并针对排名前三位的风险因素给出对策与建议。     

How to stop salami science: promotion of healthy trends in publishing behavior

The career of scientists often depends on the number of their published works. This fact leads to the overproduction of low-quality papers burying the important articles and making the knowledge less accessible. One of the methods to counteract these negative aspects might lie in the promotion of healthy trends in publishing behavior. In the present work, the theoretical analysis of a new bibliometric measure is presented, and its potential impact on the publishing strategies is carefully discussed.     

Increased visceral adiposity index associated with sexual dysfunction in men

Objective: Visceral adipose index (VAI) is a novel parameter for the evaluation of visceral obesity. As we know that obesity is a risk factor for erectile dysfunction (ED). So, in this study, we compared the VAI levels between the men with ED and without ED.

Materials and method: A total of 177 men were included in the study. Ninety-five men with ED and 82 men without ED (control). All men were evaluated for ED by Index of Erectile Function-5 items (IIEF-5). VAI levels were calculated using body mass index, high density lipoprotein and tryglyceride levels.

Results: Mean age was 53.5 (38–69) in men who have ED and 53.1 (34–69) in control. The men with ED had higher body mass index (BMI), triglyceride (TG) levels, higher waist circumference (WC) and lower high-density lipoprotein-cholesterol (HDL-C) levels. Mean VAI level was 5.18?±?2.50 in study group and 3.47?±?1.76 in control goup, respectively. VAI levels were statistically higher in men with ED (p?Discussion: The simplicity of WC and BMI measurement and TG and HDL assessment, make VAI an easily applicable index for the evaluation of visceral fat dysfunction. VAI can be useful index for the evaluation and calculation of erectile dysfunction risk.     

中国高等教育投入产出效率的综合评价——基于Window-Malmquist指数法

"双一流"建设背景下，基于合作竞争的资源配置模式决定了中国必须提高高等教育投入产出效率。综合运用Window-Malmquist指数法和空间聚类方法测算分析中国31省（市）2004-2015年的高等教育投入产出效率及其演变规律和空间差异，结果显示：（1）总体而言，中国高等教育投入产出效率呈现DEA有效状态，技术进步是其提升的主要贡献因素，但高等教育"区域鸿沟"的存在却导致追赶效应拉低了效率值；（2）从时间演变规律看，中国高等教育投入产出效率相对稳定，但上升趋势并不明显，且存在两极分化或多极分化的可能性；（3）从空间差异情况看，31个省（市）中，江苏高等教育投入产出效率最高，东部沿海地区的高等教育投入产出效率具有"高高"特征，且效率值明显高于其他地区；（4）从空间集聚特征看，在技术进步的作用下不同区域的高等教育投入产出效率存在正向的空间关系，但追赶效应却降低了这种空间联系。     

交通强国的内涵及评价指标体系

交通强国建设根本上是服务国家经济社会发展的,脱离这一基本目的来建设交通强国,则会在发展导向、发展路径等方面产生根本偏差。交通强国需要二三产联动、多产业协同,促进现代化经济体系建设。对交通运输业自身而言,交通强国建设要以高质量运输服务为核心,以提高交通运输服务的效率和效益为目标,以快速、经济、安全、绿色、自主五大特征为指向。运输服务供给能力和运输服务质量是评价交通强国两个基本方面:运输服务供给能力要满足经济社会对资源时空配置的要求,即交通运输供给能力与运输需求基本平衡;运输服务质量要满足人们对美好出行的基本预期,并在国际竞争中能够领跑世界并具有可持续性。我国交通基础设施和运输服务规模多项指标位居世界前列甚至第一,这仅仅是与我国人口、经济总量和国土面积的世界地位相匹配而已。根据本文构建的交通强国评价指标体系,定性与定量相结合分析,我国距离交通强国还有差距。     

Performance evaluation and enrollment quota allocation for higher education institutions in China

Higher education has always played an important role in promoting economic and social progress. With the rapid development of economy, China's higher education has entered a new stage and made a series of extraordinary achievements. However, the uneven development of higher education has become a critical factor restricting China’s overall progress. In this paper, we propose Data Envelopment Analysis (DEA) approach to evaluate the performance of higher education resource utilization from the perspective of provincial level. In addition, we assess productivity changes of each province with the help of Malmquist Productivity Index (MPI). Further, by considering the enrollment quota as a special kind of resource, we construct a more reasonable allocation scheme, while keeping the total number of newly added enrollment quota unchanged in the next year. Finally, according to the results, some suggestions are put forward to help the Chinese government better solve the unbalanced development of higher education among provinces.     

Skewed zero-bound distributions and process capability indices for upper specifications

A common practical situation in process capability analysis, which is not well developed theoretically, is when the quality characteristic of interest has a skewed distribution with a long tail towards relatively large values and an upper specification limit only exists. In such situations, it is not uncommon that the smallest possible value of the characteristic is 0 and this is also the best value to obtain. Hence a target value 0 is assumed to exist. We investigate a new class of process capability indices for this situation. Two estimators of the proposed index are studied and the asymptotic distributions of these estimators are derived. Furthermore, we suggest a decision procedure useful when drawing conclusions about the capability at a given significance level, based on the estimated indices and their asymptotic distributions. A simulation study is also performed, assuming that the quality characteristic is Weibull-distributed, to investigate the true significance level when the sample size is finite.     

体育建筑是城市的形象亮点

文章从体育建筑的价值与意义、设计与创新方面入手 ,论述了体育建筑是城市形象亮点的主题 ,为体育建筑的可持续发展提出了新的思路。     

秦皇岛市21世纪初期经济发展战略研究

21世纪国内外经济形势的重大变化为秦皇岛市的经济发展带来了前所未有的机遇.本文分析了秦皇岛市自身的优势和劣势,提出了在经济开放化的基础上把我市建成区域性经济中心以及在经济市场化的基础上使我市转变成为非公有制经济主导区的构想,为秦皇岛市的经济发展上新台阶提供一个新的思路.