Analogues of Khintchine, Marcinkiewicz–Zygmund and Rosenthal Inequalities for Symmetric Statistics

In this paper we prove the analogues of Khintchine, Marcinkiewicz–Zygmund and Rosenthal moment inequalities for symmetric statistics of second order in not identically distributed random variables.     

VLSI功能测试的最佳测试序列的选取

介绍了ＶＬＳＩ功能测试向量生成的Ｐｅｔｒｉ网模型和Ｐｅｔｒｉ网模拟测试序列中指令的关系,构造了压缩存储网络的拓扑信息的Ｐｅｔｒｉ网简约矩阵。用Ｐｅｔｒｉ网简约矩阵检查测试序列的不确定度,使测试序列不确定度最小,从而优化了测试序列,即从给定的指令中选出了最佳测试序列。     

Evaluation of a sequential global test of improved recovery following stroke as applied to the ICTUS trial of citicoline

The International Citicoline Trial in acUte Stroke is a sequential phase III study of the use of the drug citicoline in the treatment of acute ischaemic stroke, which was initiated in 2006 in 56 treatment centres. The primary objective of the trial is to demonstrate improved recovery of patients randomized to citicoline relative to those randomized to placebo after 12 weeks of follow-up. The primary analysis will take the form of a global test combining the dichotomized results of assessments on three well-established scales: the Barthel Index, the modified Rankin scale and the National Institutes of Health Stroke Scale. This approach was previously used in the analysis of the influential National Institute of Neurological Disorders and Stroke trial of recombinant tissue plasminogen activator in stroke.The purpose of this paper is to describe how this trial was designed, and in particular how the simultaneous objectives of taking into account three assessment scales, performing a series of interim analyses and conducting treatment allocation and adjusting the analyses to account for prognostic factors, including more than 50 treatment centres, were addressed.     

Clustering confidence sets

In this article, we present a novel approach to clustering finite or infinite dimensional objects observed with different uncertainty levels. The novelty lies in using confidence sets rather than point estimates to obtain cluster membership and the number of clusters based on the distance between the confidence set estimates. The minimal and maximal distances between the confidence set estimates provide confidence intervals for the true distances between objects. The upper bounds of these confidence intervals can be used to minimize the within clustering variability and the lower bounds can be used to maximize the between clustering variability. We assign objects to the same cluster based on a min–max criterion and we separate clusters based on a max–min criterion. We illustrate our technique by clustering a large number of curves and evaluate our clustering procedure with a synthetic example and with a specific application.     

Bayes admissible estimation of the means in Poisson decomposable graphical models

We investigate the Bayes estimation of the means in Poisson decomposable graphical models. Some classes of Bayes estimators are provided which improve on the maximum likelihood estimator under the normalized squared error loss. Both proper and improper priors are included in the proposed classes of priors. Concerning the generalized Bayes estimators with respect to the improper priors, we address their admissibility.     

连续刚构桥钢束张拉次序对预应力损失影响研究

依托预应力顶、底板钢束同时存在的连续刚构桥—老窝河特大桥,选取典型工况,应用有限元软件Midas/civil分析了预应力分批、同步张拉次序的不同对预应力损失的影响。研究表明先张拉顶板束预应力损失略小于先张拉腹板束。在实际工程中可根据现场条件选择合适的预应力张拉方式。     

一类固定工件排序问题算法研究

针对一类＂可用机器数有限,存在机器与工件间匹配约束,以机器-工件分配成本最小为目标＂的固定工件排序问题,以固定工件的开始时刻、结束时刻为基准构建网络时序图,将＂机器-工件＂分配过程看成网络时序图中的网络流问题,并设计排序问题的模拟退火算法。通过算例发现：算法平均CPU时间为32.9秒,总成本最大误差为0.07%,时间复杂度为O（M（m3＋mn））,空间复杂度为O（m2n）。结果表明：算法为多项式算法,且可行。     

研究者出版记录中的会议序列提取研究

对研究者发文序列的研究不仅可帮助了解领域研究现状,而且对于会议评级、热点预测分析等都有重要的意义。通过对研究者出版序列中的会议进行分析,提取会议序列并进行聚类,有助于发现领域相关性,理解领域发展演化。该文针对会议序列提取中直接考虑前后顺序所存在的不准确,提出了根据时间片相关的会议序列提取方法,以提高会议聚类的准确性。通过真实数据集上的定量和定性实验证明了该方法的有效性,并对结果进行了实例分析。     

海峡两岸现代汉语词汇“同义异序”、“同义异构”现象透析

由于众所周知的原因以及台湾海峡的地理区隔,海峡两岸现代汉语的发展也出现了一些明显的差异,其中词汇的"同义异序"与"同义异构"现象尤其值得注意。"同义异序词"分属于海峡两岸两个不同的语言社会,虽然表现形式不同,但并不会影响两个不同语言社会的人们对它们的理解。之所以如此,乃是因为"同义异序词"都是由两个语义相同或相类的语素构成,两个语素之间的关系是一种平等与并列的关系,因此构词的两个语素顺序如何并不影响语义表达。"同义异构词"的情况亦如此,两个词只在构词语素上有差异,并不影响理解。