电子病历管理系统中的时态数据处理

讨论了在非时态DBMS中处理电子病历的时态数据的方法,并给出了在非时态DBMS中处理不明确时间间隔的OVERLAPT运算的方法以及主键的选择。     

中国电话机的发展趋势与话音保密的市场需求

本文以世界通信的总体发展趋势为依托,结合中国通信事业的发展实际,介绍和分析了中国电话机的现状,趋向及相应的话音保密的市场需求。     

Trends in youth’s videogame playing, overall computer use, and communication technology use: The impact of self-esteem and the Big Five personality factors

The objective of the current research is to model trends in video game playing, overall computer use, and communication technology use in a longitudinal sample of youths, aged 11-16 over a 3-year interval. In addition, individual difference characteristics that may be predictive of these trends were included, namely, socio-demographic characteristics (gender, ethnicity, and parental income) and personality characteristics (self-esteem, the Big Five personality factors). Findings suggested that youth increased their overall computer and communication technology use but decreased their videogame playing over time. Many individual differences predicted mean levels of these technologies with fewer predicting slopes. Conclusions, implications, and limitations are discussed.     

产品设计中的度与中庸

首先阐述了度与中庸的概念以及两者的关系,又从和谐统一体和时中性两个方面来说明产品设计大系统的特点,最后阐明了产品设计中把握度和中庸的途径和意义。     

陕西传统民居建筑门窗装饰图案的南北地域差异性

陕南与陕北的传统民居虽然同处陕西文化和民族文化这一大的背景下,却有很多不同之处,门窗是民居建筑装饰的重点,其装饰图案的差异更是明显,本文从两地民居的门窗结构入手,通过对装饰图案的基本特征进行比较分析,探讨两地传统民居建筑中门窗装饰图案的差异。     

The use of Kernel set and sample memberships in the identification of nonlinear time series

The problem of system modeling and identification has attracted considerable attention in the nonlinear time series analysis mostly because of a large number of applications in diverse fields like financial management, biomedical system, transportation, ecology, electric power systems, hydrology, and aeronautics. Many papers have been presented on the study of time series clustering and identification. Nonetheless, we would like to point out that in dealing with clustering time series, we should also take the vague case as they belong to two or more classes simultaneously into account. Because many patterns of grouping in time series really are ambiguous, those phenomena should not be assigned to certain specific classes inflexibly. In this paper, we propose a procedure that can effectively cluster nonlinear time series into several patterns based on kernel set. This algorithm also combines with the concept of a fuzzy set. The membership degree of each datum corresponding to the cluster centers is calculated and is used for performance index grouping. We also suggest a principle for extending the fuzzy set by kernel set and further interpret events in a sensible light through these sets. Finally, the procedure is demonstrated by set off RRI data and its performance is shown to compare favorably with other procedures published in the literature.We are grateful to the referees for their careful reading and helpful comments.     

气力输送技术及其智能时间控制系统在燃煤电厂的应用

随着国家对环境保护工作的重视和社会对电厂粉煤灰的综合利用,当前新建机组都采用了干式除灰,气力输灰技术作为一种高效经济的干式除灰方式,在燃煤电厂得到了越来越广泛的应用。在气力输灰的运行控制方式中,先后出现过时间控制方式、仓泵料位计控制方式、灰斗料位计控制方式、时间加料位控制方式等多种控制方案。在本文中,介绍气力输灰的运行原理及其全新的控制模式-ITC智能时间控制系统。