国外别居制度比较——兼谈我国应设立别居制度

别居又称分居 ,是一种不同于夫妻因偶尔不和而暂时分居的法律行为。它产生于欧洲中世纪基督教的教会法 ,至今仍存在。国外各主要国家都规定了别居制度 ,并对缓和夫妻矛盾 ,降低离婚率起了非常重要的作用。我国建国以来的 1950年和 1980年两部婚姻法均未规定别居制度 ,但现实社会中别居现象大量存在。为了更好地规范别居这一法律行为 ,借鉴国外各主要国家别居制度 ,我国法律中应明确规定别居制度。     

Post-September 11: Computers, ethics and war

This paper considers the moralresponsibility of computer scientists withrespect to weapons development in post-911America. It does so by looking at the doctrineof jus in bello as exemplified in fourscenarios. It argues that the traditionaldoctrine should be augmented by a number ofprinciples, including the Principle of aMorally Obligatory Smart Arms Race, thePrinciple of Assistance to One's Enemies, thePrinciple of Public Debate on Weapons of MassDisruption, and the Principle of the MoralUnjustifiability of Private Wars.     

On the excitability of a class of positive continuous time-delay systems

This article is on the excitability of positive linear time-invariant systems subject to internal point delays. It is proved that excitability independent of delay is guaranteed if an auxiliary delay-free system is excitable. Necessary and sufficient conditions for excitability and transparency independent of the delay size are formulated in terms of the parameterization of the dynamics and control matrices. Some particular results are also given for the properties being dependent on the size of the point delay and for any possible finite values of the delay. The same formulation is given in parallel in terms of strict positivity of a matrix of an associate system obtained from the influence graph of the original system. The excitability and transparency properties are both testable through simple algebraic tests involving a moderate computational effort that is directly related to the system's order.     

Robust stable pole-placement-based adaptive control of continuous linear systems with two parametrical estimation schemes

This paper deals with the pole-placement-type robust adaptive control of continuous linear systems in the presence of bounded noise and a common class of unmodeled dynamics provided that two estimation schemes are used in parallel. Both estimation schemes are introduced in order to minimize the plant identification error by selecting, as plant parameter estimates, a convex combination of both parameter estimates which leads to the selection of one of the estimation schemes, via a switching rule, on time intervals of at least a minimum prefixed residence duration. The weights of the individual parameter vector estimates are provided at each time by an optimization or suboptimization scheme for a quadratic loss function of the possibly filtered tracking error and/or control input. The robust stability of the overall adaptive scheme is ensured by an adaptation relative dead zone which takes into account the contribution of the unmodeled dynamics and bounded noise. The basic results are derived for two different estimation strategies which have either a shared regressor with the plant or individual regressors for the input contribution and its contributed derivatives. In this second case, the plant input is obtained from a similar convex combination rule as the one used for the estimators in the first approach. An extension of the basic strategies is also pointed out including a combined use of the (sub) optimization scheme with a supervisor of past measures for the on-line calculation of the estimator weights in the convex combination. Finally, the extension of the scheme for the use of any number of parametrical estimators is focused on.     

焦虑现象对\"技术练习\"效果影响的实验研究

通过排球技术与对不同练习氛围中的焦虑现象进行实验研究与探讨,表明练习者的状态焦虑水平对练习效果影响较大.     

What do we know about deaf clients after thirteen years of ambulatory mental health care? An analysis of the PsyDon database, 1987-1999

Little is known about demographic, deafness-related, and diagnostic characteristics of deaf and partially hearing people with psychosocial or psychiatric problems. A study was conducted derived from data from intake assessment interviews of people with hearing loss treated at a Dutch ambulatory mental health center for the deaf between 1987 and 1999. Both sexes were equally represented. People who were postlingually deaf, hard of hearing, below age 22 years, or above age 65 years were less likely to ask for help than other groups in the study. Men presented more psychiatric disorders, and women more psychosocial problems, especially partially hearing women. The authors recommend stronger emphasis on mental health care for postlingually deaf people, severely hard of hearing people, adolescents, and retirement-age people. They also recommend development of skills for rational and emotional self-expression in the education and rearing of children with hearing loss.