Approximate prediction limit for weibull failure based on preliminary test estimator

In this paper we have considered type II censored sample from a two parameter Weibull distribution with the known scale parameter. Using the preliminary test estimator of the unknown shape parameter (3 proposed by Pandey (1983), the paper derives a method of finding the approximate prediction limit for the minimum or, more generally,the j^th smallest of a set of future observations from the Weibull or even extreme-value distribution     

玉石冲突与四时转换--<红楼梦>结构论研究浅探

红学自产生以来就一直方兴未艾，研究《红楼梦》的专著和文章更是汗牛充栋。本文运用结构主义方法来解读《红楼梦》，发现木石前盟与金玉良缘间的矛盾即玉石对立冲突是《红楼梦》全书的最核心结构。而这种玉石冲突又是按时间顺序展开，通过四季循环将《红楼梦》的哲理提升到二律背反的人类悲剧命运的高度，进而对《红楼梦》的主题说、作者说得出自己的结论。     

Eye of the Beholder? Sociocultural Factors in the Body Image and Sexual Well-Being of Heterosexual Women

ABSTRACT. Participants (124 heterosexual women) completed measures of thin-ideal internalization, discrepancy between perceptions of actual and ideal figure (DISC_SELF), perceptions of the discrepancy between estimates of partner's view of actual and ideal female figure (DISC_PART), body image, and sexual well-being. We found support for the proposed perception-of-partner pathway in that greater DISC_PART was associated with poorer body image, which in turn was associated with poorer sexual well-being. However, we found little support for a link between thin-ideal internalization or DISC_SELF and sexual well-being. The results suggest that heterosexual women's beliefs about how their partners view them are important to their sexual well-being.     

The Barbie Mystique: Satisfaction with Breast Size and Shape across the Lifespan

ABSTRACT

The prevalence of breast augmentation and breast lift surgery suggests that many women are dissatisfied with their breasts. This study analyzed women's and men's views about breast size and shape among 52,227 heterosexual adults, ages 18–65, who responded to an online survey. Although most women (70%) were dissatisfied with the size or shape of their breasts, most men (56%) were satisfied with their partner's breasts. Younger and thinner women worried that their breasts were too small; older and heavier women were more concerned with breast droopiness. Women who were dissatisfied with their breasts were more likely to report lower body satisfaction and to express concern about wearing a bathing suit in public. Further, dissatisfied women were also less willing to undress in front of their partner and were more likely to conceal their breasts from their partner during sex. These findings suggest that dissatisfaction with breasts is widespread among adult women.     

从转喻与隐喻看新时期小说的发展

从转喻与隐喻的叙事形态角度考察新时期小说的发展 ,将其分为四个时期进行分析 ,并得出结论 ,小说应在转喻与隐喻的适度融合中兼顾写实与象征 ,以诗意内涵提升小说的艺术价值     

儿童的自由:以身体为基的自由

以身体为基的自由是一种实践的、动态的自由,此自由体现在身体不断地对界限进行超越的过程中,体现在不确定性和流动性中。儿童的自由只有在实践的、不确定的身体运动中才能生长起来。儿童的权力,从动作出发而产生;儿童的智慧,在体验中生长;儿童的自由,在身体解放中得以实现。     

A Time‐Dependent Risk Assessment for Broken Compact Fluorescent Lamps

Environmental Protection Agency (EPA) ambient air quality guidelines are meant to limit long‐term exposures of toxins to safe levels. Unfortunately, there is little guidance for what constitutes a safe level from a one‐time (or very infrequent) short exposure(s). In the case of mercury, a review of the derivation of the EPA ambient air quality standard shows that it implicitly assumes a tissue burden model. The time dependence of the tissue burden is commonly described in terms of a half‐life, a modeling assumption that presumes that the decline in the tissue burden after a single exposure can be approximately described as an exponential decay. In this article, we use a simple exponential tissue burden model to derive a time‐dependent no observable adverse effect level (NOAEL) for mercury concentrations in air. The model predicts that tissue body burden will asymptotically approach the EPA air quality level for long exposure times, and reach workplace standard levels for exposures of a few hours. The model was used along with data on mercury levels from experimental work done by the Maine Department of Environmental Protection to evaluate the risks from a broken compact fluorescent lamp in a residential setting. Mercury levels approached the NOAEL only when the debris was left in an almost sealed room. Normal common‐sense cleaning measures: removal of debris to an outside area, and ventilation of the room for several minutes, reduced exposures to less than 1% of the NOAEL.     

钢筋混凝土损伤梁动力特性的有限元分析

以钢筋混凝土梁为研究对象,基于Euler-Bernoulli梁理论和结构动力学理论,通过有限元分析,计算得到了不同裂纹状态下梁的固有频率和模态振型,研究了裂纹对梁振动响应的影响。结果表明,损伤结构动力特性对损伤的敏感性并不能简单的归结为高频一定敏感,低频一定不敏感,应视裂缝位置与振型节点关系而论。     

Shape analysis for automated sulcal classification and parcellation of MRI data

We describe geometric invariants that characterize the shape of curves and surfaces in 3D space: curvature, Gauss integrals and moments. We apply these invariants to neuroimaging data to determine if they have application for automatically classifying and parcellating cortical data. The curves of sulci and gyri on the cortical surface can be obtained by reconstructing cortical surface representations of the human brain from magnetic resonance imaging (MRI) data. We reconstructed gray matter surfaces for 15 subjects, traced 10 sulcal curves on each surface and computed geometric invariants for each curve. These geometric features were used classify the curves into sulcal and hemispheric classes. The best classification results were obtained when moment-based features were computed on the sulcal curves in native space. Gauss integral measures showed that they were useful for differentiating the hemispheric location of a single sulcus. These promising results may indicate that moment invariants are useful for characterizing shape on a global scale. Gauss integral invariants are potentially useful measures for characterizing cortical shape on a local, rather than global scale. Gauss integrals have found biological significance in characterizing proteins so it is worthwhile to consider their possible application to neuroscientific data.     

论歌唱的音乐空间感的形成

通过人体振动空间转化理论，建立歌唱音乐空间感意识。从此出发，着眼口形与喇叭、气息与能量、共鸣与空闻，提出口形运作、咬字吐字功能、言语空间感向歌唱空间感转化、气息能量积聚，以及人体持续、整体、弹性振动空间中多重音质共鸣等，对于歌唱中音乐空间感的形成起到的重要作用。