网络语言的兴起成因分析及其网络语言规范化问题

随着“网络时代”的来临,互联网络在中国的飞速发展和日益普及,网络交际这种全新的高科技交际模式已被越来越多的人所接受,网络语言极大地影响着21世纪信息社会。     

CHARACTERIZATION OF EFFICIENT SEQUENTIAL SCHEMES FOR POPULATION GROWTH MODELS1

For population growth models, which include standard processes like Poisson, birth, birth-death, immigration-death, simple epidemic and M/M/1 queue as particular cases, we obtain efficient sequential schemes and characterize all efficiently estimable functions of the parameters by first deriving a sequential version of the information inequality.     

国家自然科学基金资助项目综合评价:基于Vague 集多准则决策

采用基于Vague 集的多准则决策方法,对国家自然科学基金11 类主要竞争性资助项目的实施情况进行综合评价和排序． 首先,通过问卷调研的方式,由国家自然科学基金项目评审专家采用“高”、“不高”和“不清楚”三类语义,对各类项目按照“评审公正性”、“管理规范性”、“科研创新性”和“社会影响力”四个准则进行评价; 然后,根据问卷统计结果,将语义评价转化为Vague 估计值,并利用一种新的评分函数计算各类项目在各准则下的得分; 最后,采用正态分布的OWA 算子集结各准则下的得分,得到所有项目的综合评价和排序． 本文的研究结果将为完善国家自然科学基金的资助结构与管理模式提供重要参考依据．     

也谈电磁感应定律的表述与“通量法则”的反例问题

本文从电磁场基本原理出发表述电磁感应定律，对于“通量法则”构造回路的问题，指出也要紧扣基本原理进行分析，进而提出在一些典型例子中构造回路的不同意见。     

基于Rough集的属性约简的算法分析

研究了粗集理论中基于差别矩阵,关联矩阵的属性约简算法,分析了各种算法和原理,指出了优缺点,对以后的研究方向提出了建议.     

Whom should we believe? Aggregation of heterogeneous beliefs

We examine the collective risk attitude of a group with heterogeneous beliefs. We prove that the wealth-dependent probability distribution used by the representative agent is biased in favor of the beliefs of the more risk tolerant consumers. Moreover, increasing disagreement on the state probability raises the state probability of the representative agent. It implies that when most disagreements are concentrated in the tails of the distribution, the perceived collective risk is magnified. This can help to solve the equity premium puzzle. We show that the trade volume and the equity premium are positively correlated.

On the emptiness of the stability set of order d

We know from Li's theorem (1993) that the stability set of order d may be empty for some preference profiles. However, one may wonder whether such situations are just rare oddities or not. In this paper, we partially answer this question by considering the restrictive case where the number of alternatives is the smallest compatible with an empty stability set. More precisely, we provide an upper bound on the probability for having an empty stability set of order d for the majority game under the Impartial Weak Ordering Culture assumption. This upper bound is already extremely low for small population and tends to zero as the number of individuals goes to infinity.     

On the Owen Set of Transportation Solutions

This paper presents an axiomatic characterization of the Owen set of transportation games. In the characterization we use six properties including consistency (CONS2) and splitting and merging (SM) which are firstly proposed and defined for this setup in the present paper.     

An EWMA chart for monitoring process mean

In the statistical process control literature, there exists several improved quality control charts based on cost-effective sampling schemes, including the ranked set sampling (RSS) and median RSS (MRSS). A generalized cost-effective RSS scheme has been recently introduced for efficiently estimating the population mean, namely varied L RSS (VLRSS). In this article, we propose a new exponentially weighted moving average (EWMA) control chart for monitoring the process mean using VLRSS, named the EWMA-VLRSS chart, under both perfect and imperfect rankings. The EWMA-VLRSS chart encompasses the existing EWMA charts based on RSS and MRSS (named the EWMA-RSS and EWMA-MRSS charts). We use extensive Monte Carlo simulations to compute the run length characteristics of the EWMA-VLRSS chart. The proposed chart is then compared with the existing EWMA charts. It is found that, with either perfect or imperfect rankings, the EWMA-VLRSS chart is more sensitive than the EWMA-RSS and EWMA-MRSS charts in detecting small to large shifts in the process mean. A real dataset is also used to explain the working of the EWMA-VLRSS chart.     

New two-stage sampling designs based on neoteric ranked set sampling

Neoteric ranked set sampling (NRSS) is a recently developed sampling plan, derived from the well-known ranked set sampling (RSS) scheme. It has already been proved that NRSS provides more efficient estimators for population mean and variance compared to RSS and other sampling designs based on ranked sets. In this work, we propose and evaluate the performance of some two-stage sampling designs based on NRSS. Five different sampling schemes are proposed. Through an extensive Monte Carlo simulation study, we verified that all proposed sampling designs outperform RSS, NRSS, and the original double RSS design, producing estimators for the population mean with a lower mean square error. Furthermore, as with NRSS, two-stage NRSS estimators present some bias for asymmetric distributions. We complement the study with a discussion on the relative performance of the proposed estimators. Moreover, an additional simulation based on data of the diameter and height of pine trees is presented.