查询词典 stratified sample

According to the unstable condition of the displaceable block and the breakage term of the stratified rock, this paper analyzed the stability of surrounding rock during the excavating process in different geological structures.

长江科学院监理公司，湖北武汉430030中文摘要：结合工程实例，基于块体的失稳条件和层状岩体的破坏条件，分析不同地质构造形态岩层下，隧洞开挖过程中围岩的稳定性。

"Any of numerous hereditary, endogamous social subclasses stratified according to Hindu ritual purity."

根据印度教仪式的纯洁性划分的无数个世袭的、内部通婚的次等级之一。

Any of numerous hereditary, endogamous social subclasses stratified according to Hindu ritual purity.

种姓：根据印度教仪式的纯洁性划分的无数个世袭的、内部通婚的次等级之一

Any of numerous hereditary ,endogamous social subclasses stratified according to Hindu ritual purity.

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Any of numerous hereditary ,endogamous social subclasses stratified according to Hindu ritual purity.

大多数赋有世袭统治权的家族逐渐变得怠惰、无能。

Chitosan-Collagen-GAGs collagen gelart ificial skin is a new collagen gel living artificial skin which has certain antibacterial ability and stratified epiderm is and dense dermis structure like normal skin.

壳多糖-胶原-GAGs胶原凝胶人工皮肤是一种新型、有一定抗感染能力的活人工皮肤。

Is there any hope for peace, justice or widespread happiness in a world so ineluctably stratified?

那么，在这样一个等级分明的世界里，还会不会有和平、公正与大众幸福的希望呢？

Materials and Methods: There were 91 prostate cancer patients included in this study. We analyzed the characteristics of each item of the EORTC QLQ-C30 and EORTC QLQ-PR25 by CTT and IRT. The infit statistics of Rasch model was used to examine the unidimensionality of each domain, and also evaluate the item difficulty, the range of item threshold, item targeting and the reliability of the two questionnaires. Furthermore, patients were measured before therapy and at 1, 3 and 6 months after the start of therapy and then compared each health-related quality of life score of the post-therapy groups with the baseline scores. Finally, the item psychometric properties were examined for different groups stratified by age and disease severity.

材料与方法：本研究共计收案91名摄护腺癌患者，利用传统测量与项目反应理论（item response theory， IRT）比较分析问卷各题目的特质，以适合度指标检验各向度是否符合单一向度的假设，并检验每一题目的难度、门槛值范围、适中性，以及问卷的信度；然后，再检验各题目在治疗前后、不同疾病严重度或不同年龄族群中之心理计量特质是否相同。

High resolution joint inversion of seismic data and well logging is an effective method to predict the thin interbedded reservoir in the exploration and development of eastern oil field in China. However, the combination of high frequency logging data with relative low frequency seismic data for establishing a stratified geologicmodel well matching the seismic data is the foundation for obtaining good inversion result.

在我国东部油田的勘探开发中，井震联合高分辨率反演是薄互层储层预测的有效方法，将高频测井资料和相对低频的地震资料有机地结合起来，得到与地震资料吻合程度高的层状地质模型是获得好的反演结果的基础。

First, based on the analogy of the mathematical expressionbetween the propa gation of EM wave and that of seismic wavein a horizontal stratified earth, the re flectivity and transmissionformulation for EM plane wave propagating incident nor malto the layers are derived, the formulation with relation to pseudo-impulse is discussed and pseudo-impulse response is compared with impulse response of re flection seismology.

作者首先基于电磁波与地震波在水平层状介质中传播特征在数学形式上的相似性，推导了垂直入射平面电磁波在层间反射与透射传播函数，并讨论了它们与伪脉冲的关系，与反射地震学中脉冲响应作了对比。

Go to your desktop and right click in a blank space.

请到您的桌面，然后右击一个空白。

Tara appears in Buddhism, Jainism, and particularly, Tibetan Lamaism, as a complex array of manifestations: goddess of ascetism and mysticism, mother creator, protectress of all humans as they cross the sea of life.

度母出现在佛教，耆那教里面，尤其是西藏的喇嘛教，作为一系列的陈列阵容；神秘的女神，创世之母，人类横过生命之海洋的女性保护者。