“亂”是{治}{乱}同词吗

相反的两个义位如果不属于同一个词位（词）,就不能看作是反训现象,因为＂词＂这个语言学概念是从共时同一性角度来确定的。{治}{乱}两个义位有不同的来源,语音形式也不相同,虽然它们后来采用了同一个字形,却代表了不同的词,因而＂亂＂不是{治}{乱}同词,不是反训词。     

LR cointegration tests when some cointegrating relations are known

This paper considers the asymptotic analysis of the likelihood ratio (LR), cointegration (CI) rank test in vector autoregressive models (VAR) when some CI vectors are known and fixed. It is shown that the limit law is free of nuisance parameters. In the case of LR tests against the alternative of completely unrestricted CI space, the limit law can be expressed as the convolution of known distributions. This deconvolution is employed to approximate the quantiles of the distribution, without resorting to new simulations.     

Discharge Planning Process on a General Psychiatry Unit

Abstract

This study investigates the discharge-planning process and short-term outcomes for 100 patients discharged from a general psychiatry unit. The contributions of functional/illness factors, personal factors, and family factors to communication of the plan, length of stay, and satisfaction with discharge-planning process were investigated. Findings indicate that both the process and short-term outcomes of discharge planning are affected by factors that can be addressed in interventions with patients, families and the social environment. This research suggests that discharge planning without attention to psychosocial factors will fail to address issues relevant to patient well-being.     

ASYMPTOTIC DISTRIBUTIONS OF SEASONAL UNIT ROOT TESTS: A UNIFYING APPROACH

ABSTRACT

This paper adopts a unified approach to the derivation of the asymptotic distributions of various seasonal unit root tests. The procedures considered are those of Dickey et al. [DHF], Kunst, Hylleberg et al. [HEGY], Osborn et al. [OCSB], Ghysels et al. [GHL] and Franses. This unified approach shows that the asymptotic distributions of all these test statistics are functions of the same vector of Brownian motions. The Kunst test and the overall HEGY F-test are, indeed, equivalent both asymptotically and in finite samples, while the Franses and GHL tests are shown to have equivalent parameterizations. The OCSB and DHF test regressions are viewed as restricted forms of the Kunst-HEGY regressions, and these restrictions may have non-trivial asymptotic implications.     

一种立式回转台钻孔专机的设计

介绍了一种加工Buick轿车无级变速离合器总成中二档轴零件的立式回转台钻孔专机的结构、夹具及气动控制原理 ,其效率高于钻模加工 ,且加工精度稳定     

既雕既琢 复归于朴——就钱学森之评价与叶永烈先生商榷

杰出科学家已成为当代综合国力竞争最宝贵的资源之一,而关于杰出科学家的评价则对优秀人才的成长、科学精神的弘扬、社会进步的推动有无可估量的影响。钱学森是当代世界著名科学家,有杰出的科学贡献和非凡的人格魅力,然而关于钱学森的评价也存在不同的声音。值此钱学森诞生100周年之际,本文通过钱学森"万斤亩"公案,立足于钱学森思想发展的自然过程和中国社会历史变迁的背景,从资料考证、思想方法、评价基旨等三个方面对钱学森思想中的社会性一面,提出历史唯物主义的合理解释,并对叶永烈先生的过度辩护提出不同看法,以期复归钱学森先生质朴可亲的自然本色,并通过本文的初步研究,促进实事求是评价杰出科学家的良好学风。     

劳动力价值取向经济体系探析

在社会主义市场经济条件下,劳动者的劳动是社会总劳动的一部分,具有社会性质;社会劳动力价值参与国民收入的初次分配,是实行按劳分配的基础。社会劳动力价值取向目标要体现社会主义的生产目的,即最大限度地满足人们的物质文化生活需要;用人单位劳动力价值取向界定在边际成本等于边际收益的理论基础上;劳动者向社会提供的劳动数量和质量不同劳动者的劳动力价值存在根本差别,按劳分配也必然是多层次的。因此在社会保障领域内应更多地关注公平,通过国民收入的分配和再分配来缩小人们之间收入的差距,实现在一个有效率的经济体系中增进平等。     

On regression-based tests for persistence in logarithmic volatility models

Building on the work of Pantula (1986), this paper discusses how the hypothesis of conditional variance nonstationarity in the logarithmic family of generalized autoregressive conditional heteroskedasticity (GARCH) and stochastic volatility processes may be tested using regression-based tests. The latter are easy to implement, have well-defined large-sample distributions, and are less sensitive to structural changes than tests based on the quasimaximum likelihood estimator.     

Weighted Dickey–Fuller processes for detecting stationarity

Aiming at monitoring a time series to detect stationarity as soon as possible, we introduce monitoring procedures based on kernel-weighted sequential Dickey–Fuller (DF) processes, and related stopping times, which may be called weighted DF control charts. Under rather weak assumptions, (functional) central limit theorems are established under the unit root null hypothesis and local-to-unity alternatives. For general dependent and heterogeneous innovation sequences the limit processes depend on a nuisance parameter. In this case of practical interest, one can use estimated control limits obtained from the estimated asymptotic law. Another easy-to-use approach is to transform the DF processes to obtain limit laws which are invariant with respect to the nuisance parameter. We provide asymptotic theory for both approaches and compare their statistical behavior in finite samples by simulation.     

系统仿真在现代控制理论教学中的应用

文章结合线性二次型性能指标最优控制理论的设计方法,通过具体实例介绍在Mat-lab5.3环境下完成一个线性二次型最优控制器的设计过程,并研究了参数变化对最优控制系统的影响,说明了系统仿真在现代控制理论教学中的重要作用,提高了教学效果。