相对估价法评估高科技上市公司价值的研究

探讨用相对估价法对中国高科技上市公司进行价值评估的实用性和局限性。首先,高科技企业将大量利润投资于新产品研发,当采用所有上市公司作为总样本所获取的基准比率对该类公司进行价值评估时,其值往往偏低。其次,各比率工具对高科技企业的定价误差存在差异,准确性有高有低。最后,高科技企业的高风险和收益的不确定性导致对该类公司未来现金流难以估算,使用市盈率对其定价不准确。     

An assessment of the construct validity of Ryff’s Scales of Psychological Well-Being: Method, mode, and measurement effects

This study assesses the measurement properties of Ryff’s Scales of Psychological Well-Being (RPWB)—a widely used instrument designed to measure six dimensions of psychological well-being. Analyses of self-administered RPWB data from three major surveys—Midlife in the United States (MIDUS), National Survey of Families and Households II, and the Wisconsin Longitudinal Study (WLS)—yielded very high overlap among the dimensions. These large correlations persisted even after eliminating several methodological sources of confounding, including question wording, question order, and negative item-wording. However, in MIDUS pretest and WLS telephone administrations, correlations among the dimensions were much lower. Past research demonstrates that self-administered instruments provide more valid psychological measurements than telephone surveys, and we therefore place more weight on the consistent results from the self-administered items. In sum, there is strong evidence that RPWB does not have as many as six distinct dimensions, and researchers should be cautious in interpreting its subscales.     

对中国文艺可持续发展问题的思考

通过对过去20余年中国文艺发展进程中存在的某些问题的反思,对中国文艺在新世纪的发展作可持续发展思考。中国文艺要走积累式发展之路,要重视文艺的社会价值,要重视本土艺术资源,要重视文艺家的人格建设。     

Ryff’s Six-factor Model of Psychological Well-being, A Spanish Exploration

This article aims to provide researchers interested in using Ryff’s Scales of Psychological Wellbeing with additional information to make an informed decision on the scales and items to use. It builds on the discussion in the literature on the six factor structure of this measure. An alternative shortened version of this wellbeing measure (Van Dierendonck 2004). Personality and Individual Differences, 36, 629–643) was analyzed in a combined Spanish language sample from Spain and Columbia. Using confirmatory factor analysis, one-, two-, three- and six-factor models were compared. The results showed that indeed four out the six dimensions overlapped considerably. Nevertheless, the model that fit the data best was the six factor model with one underlying second order well-being factor, hereby confirming Ryff’s model in a non-Anglo–Saxon culture.     

Maximum-likelihood and closed-form estimators of epidemiologic measures under misclassification

There is a large literature on estimation under misclassification. The present paper reviews epidemiologic inference under misclassification in the multiway contingency-table setting, and addresses a few controversial issues. In the 1990s, claims of inefficiency of early closed-form estimators of odds ratios under misclassification arose from misapplication of the estimators to studies with internal validation. In reality, these estimators are maximum likelihood (ML) and hence efficient under the external-validation assumptions used for their derivation. For the internal-validation case, a new closed-form estimator is derived that incorporates the nondifferentiality constraint into the predictive-value (“direct” or “inverse-matrix”) estimator. Results are presented in a general framework that applies to misclassification in models for multiway tables, and that allows the target parameter to be any measure of association or effect.     

汉语语用修辞学建立的背景

语用、修辞密切相关 ,建立一门修辞学与语用学联姻的汉语语用修辞学 ,既有现代汉语修辞学发展的趋势作依据 ,又有现代语用学的理论滋养 ,而且是顺应人们提高语言能力的需要。     

数字式可编程锁相环光栅信号倍频器

用微型计算机控制锁相环(PLL)可对计量光栅信号进行数字倍频。用这种技术产生的角度定标脉冲去量度齿轮传动链误差比用时钟脉冲合理,有助于提高光栅仪器的动态检测精度。     

一阶微分方程的周期边值问题

本文对一阶微分方程的周期边值问题,在较弱条件下,建立两个上下解比较定理,并构造出解的上下单调逼近序列。所得定理1推广了[1]中定理1.1.7。     

社会主义的价值取向与可持续发展

马克思主义认为 ,在人类社会的产生过程中形成的自然界是人的现实的自然界 ,人与自然必须协调发展 ,而共产主义是人与自然之间、人与人之间的矛盾的真正解决。马克思主义的社会目的和价值取向是追求全人类的解放和人的全面发展。可持续发展思想是人们对资本主义社会以来唯利是图价值观的反思 ,一定程度上已超越了狭隘的民族地域的限制 ,体现了人类自律的道德规范和价值取向 ,与社会主义的价值取向具有一致性。它们都追求社会的公正和公平 ,都体现出对全人类生存发展的终极关怀     

模糊综合评价模型在养老基金投资风险控制中的应用

1我国养老基金投资面临的风险及风险预警指标的构成养老基金投资面临着各种风险,按风险的来源可划分为:市场风险、信用风险、流动风险、操作性风险和法律风险,政治风险,货币风险,购买力风险等。此外,还面临低于预期利率风险和资产和负债不匹配风险等。据此可以构建养老基金投资