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文对我国普通高校学生进行了体育课学习的问卷调查,旨在得知我国普通 高校学生的体育课学习兴趣及其存在的问题,同时为体育教育改革提供有 力的理论依据． 相似文献
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This paper proposes a time domain approach to deal with the regional eigenvalue-clustering robustness analysis problem of linear uncertain multivariable output feedback proportional-integral-derivative (PID) control systems. The robust regional eigenvalue-clustering analysis problem of linear uncertain multivariable output feedback PID control systems is converted to the regional eigenvalue-clustering robustness analysis problem of linear uncertain singular systems with static output feedback controller. Based on some essential properties of matrix measures, a new sufficient condition is proposed for ensuring that the closed-loop singular system with both structured and mixed quadratically-coupled parameter uncertainties is regular and impulse-free, and has all its finite eigenvalues retained inside the same specified region as the nominal closed-loop singular system does. Two numerical examples are given to illustrate the application of the presented sufficient condition. 相似文献
124.
Ya Gu Jicheng Liu Xiangli Li Yongxin Chou Yan Ji 《Journal of The Franklin Institute》2019,356(3):1623-1639
This paper presents the problems of state space model identification of multirate processes with unknown time delay. The aim is to identify a multirate state space model to approximate the parameter-varying time-delay system. The identification problems are formulated under the framework of the expectation maximization algorithm. Through introducing two hidden variables, a new expectation maximization algorithm is derived to estimate the unknown model parameters and the time-delays simultaneously. The effectiveness of the proposed algorithm is validated by a simulation example. 相似文献
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This article compares two statistical approaches for modeling growth across time. The two statistical approaches are the multilevel model (MLM) and latent curve analysis (LCA), which have been proposed to depict change or growth adequately. These two approaches were compared in terms of the estimation of growth profiles represented by the parameters of initial status and the rate of growth. A longitudinal data set obtained from a school‐based substance‐use prevention trial for adolescents was used to illustrate the similarities and differences between the two approaches. The results indicated that the two approaches yielded very compatible results. The parameter estimates associated with regression weights are the same, whereas those associated with variances and covariances are similar. The MLM approach is easier for model specification and is more efficient computationally in yielding results. The LCA approach, however, has the advantage of providing model evaluation, that is, an overall test of goodness of fit, and is more flexible in modeling and hypothesis testing as demonstrated in this study. 相似文献
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The increasing importance of the competition in global university ranking has resulted in a paradigm shift in academic governance in East Asia. Many governments have introduced different strategies for benchmarking their leading universities to facilitate global competitiveness and international visibility. A major trend in the changing university governance is the emergence of a regulatory evaluation scheme for faculty research productivity, reflected by the striking features of the recent changing academic profile of publication norms and forms that go beyond the territories of nation-states in the East and West. With the expansion of the Taiwanese higher education system in the last two decades, the maintenance of quality to meet the requirements for international competitiveness has become a key concern for policy makers. Since 2005, the Ministry of Education has introduced a series of university governance policies to enhance academic excellence in universities and established a formal university evaluation policy to improve the competitiveness and international visibility of Taiwanese universities. In so doing, the government has legalized a clear link between evaluation results and public funding allocation. Research performance is assessed in terms of the number of articles published in journals indexed by the Science Citation Index (SCI), the Social Science Citation Index (SSCI), and the Arts and Humanities Citation Index and in terms of citation rates and associated factors. Therefore, evaluation has taken on a highly quantitative dimension. Despite the efforts of concerned parties to encourage academic excellence, the abovementioned quantitative evaluation indicators have resulted in bitter complaints from the humanities and social sciences, whose research accomplishments are devalued and ignored by the current quantitative indicators. In this paper, the authors describe the recent petition for collective action initiated by university faculty to protest the privileging of SSCI and SCI publications as critical indicators for academic performance regardless of faculty discipline and specialization. The article concludes its argument with a group petition calling for more diverse and reliable indicators in recognizing the research of different natures and disciplines while creating culturally responsive evaluation criteria for social sciences and humanities in the Taiwanese academe. The article not only sheds light on academic evaluation literature, especially on the uncertain paradox of globalization and market economy, but also proposes alternatives to the evaluation system for humanities and social sciences in higher education. 相似文献
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Prudence Jane Berry 《Journal of Higher Education Policy & Management》2014,36(3):305-314
This article looks at the range of financial reporting models available for use in the Australian higher education sector, the possible application of activity-based costing (ABC) in faculties and the eventual rejection of ABC in favour of a more qualitative model designed specifically for use in one institution, in a particular Faculty. The decision not to implement ABC in the Faculty is examined, looking to the overall purpose and outcomes of Faculty activities. The broader question will be asked, what kinds of obstacles are likely to sound the death knell for ABC use in universities? 相似文献
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