文本的回归与超越──两次全国中青年红学研讨会的思考

全国中青年红学研讨会已经开过两次，首届会议的主题是强调回归文本，第二届会议的主题则是文献、文本、文化在红学中的融通和创新，本文对两次会议的经验得失进行了总结，谈到红学研究中不但要回归文本，更重要的是超越文本，在具体操作中，要以文献研究为基础，以文本研究的轴心，以文化研究为指归，在回归文本中寻求上述三者的融通和创新，从而真正消除“红内线”与“红外线”的分野，适应和推动21世纪红学研究的转型。     

2004年亚洲花样滑冰锦标赛男、女单人滑技术问题分析

通过对2004年亚洲花样滑冰锦标赛男子、女子单人滑在短节目和自由滑中的技术表现,采有现场观察方法,将各类技术动作完成程度和出现的问题进行统计,用数据说明技术状况并加以分析,为教练员和运动员的训练和比赛提供参考。     

An approach to estimate degree completion using drop-out rates

A completion rate of an institution I of year x is defined as the proportion of starting students during year x that succeed in graduating at I at some point in the future. In this paper, a new method is proposed to estimate such completion rate. This indicator is entirely based on the population of drop-out students during one academic year x at the institution I. The proposed method is not based on a cohort of students so it allows an estimation of the current school effectiveness without substantial delay. Furthermore a statistical framework is presented in which completion rates can be studied. The proposed methodology results in a statistical estimator with a bias that stays small under appropriate assumptions.     

Lessons learned from two years of K-MOOC experience

In October 2015, Korea launched its first massive open online course (MOOC) program entitled K-MOOC. This study analyzes the K-MOOC learner data provided by the National Lifelong Learning Agency. The data include the 272 courses implemented between 26 October 2015, and 31 August 2017 and the participants who took the said courses. The number of participants in the K-MOOC courses in the same period stands at 289,163. The average completion rate of K-MOOC was 9.3%. It is not far below the average completion rate of MOOCs in general, which is known to be 10% or lower. A comparison between Korea’s K-MOOC and the United States’ edX, which consists of similar courses to the former, shows that the most visible difference between the two lies in the average number of participants per course. An average K-MOOC course is taken by 1,063.1 participants, whereas an average edX course serves 15,341.5 participants. Moreover, there were 91% of participants who accessed the K-MOOC courses from their host country, whereas it was 29% for edX.     

用于心率变异信号分析的动力噪声干扰混沌系统建模(英文)

心脏动力系统可能是其内在动力学和外部环境影响的混合体，因此从心率变异信号中确定混沌现象非常困难．本文提出一种优化方法，获得一组由某种动力系统产生的时间序列，并使该序列与原始信号尽可能接近．对动力噪声干扰混沌模型进行了检验后，应用于心率变异信号分析时发现了正的最大Ｌｙａｐｕｎｏｖ 指数     

一类修正的Bernstein算子的点态逼近估计

利用经典的Bojanic-Cheng分解方法,结合分析技术,研究了修正的Bernstein算子对一类绝对连续函数的逼近,得到比较精确的收敛阶和渐近展开式.     

BIOTECHSEEK

No abstract available for this article.     

中国农村工资性就业教育收益率的估计

根据CHIP农村住户调查数据,估算了1995、2002、2007年中国农村工资性就业的教育收益率。OLS估计表明1995-2007年农村全体打工者的教育收益率在3%-4%之间,呈轻微的下降趋势。在纠正了能力偏误和样本选择偏差之后,从2002年到2007年,全体打工者的教育收益率从3.2%下降到2.6%,本地打工者的教育收益率从3.5%下降到2.0%,外出打工者的教育收益率从不显著上升到4.5%。此外,教育水平的提高有助于促进农村劳动力从农业生产转向工资性就业,特别是转向本地的工资性就业。     

Frobenius范数‖·‖_Σ下的逆收敛速度

研究表明,在K与p成正比的极限结果就是Σ-1和Σs-am1性能大致相同,当K=o(p)时,Σ-1的性能优于Σs-am1。     

由车辆购置税优惠取消引起的思考

车辆购置税优惠在财政部2010年第127号文件中被正式取消,这意味着在2008年金融危机背景下启动的车购税优惠将于2011年退出市场。车购税优惠的取消必将对汽车市场,消费者预期以及国家其他方面政策的实施产生一定影响。作者首先对汽车购置税的历史进行简短的回顾以阐明车购税的实施目的,进而对车购税的几次调整进行解读并基于专业知识以及数据资料对取消车购税优惠的弊端进行深入分析,并以此为基础提出对未来车购税调整的一些建议。