大跨度现浇板最小板厚的简化计算

通过理论分析和公式推导把规范中的挠度验算公式进行了简化,并形成可查表格,使设计人员能通过查表验算或者选择板厚,检验板厚在总荷载下的挠度是否符合要求,同时在给定使用荷载下选择满足挠度要求的最小板厚.     

A SINGLE CHANNEL ON/OFF MODEL WITH TCP-LIKE CONTROL

We model behavior of a TCP-like source transmitting over a single channel to a server that processes work at a constant rate τ. Transmission by the source follows an on/off mechanism. When the overall load in the system is below a critical constant γ, transmission rates increase linearly but when the load exceeds γ, then transmission rates decrease geometrically fast. We study the system by means of an embedded Markov chain, which gives the buffer content at the start of transmissions. Attention is paid to the time necessary to transmit a file of size L and both the tail behavior and expectation of the distribution of file transmission time are considered.     

金庸小说的主题演变与儒学反思

金庸小说的主题以理想主义开始,逐渐过渡到批判主义,最后以解构主义结束。在这一演变过程中,除了表现最为常见的侠义精神之外,还隐藏有一条儒学线索,其中既有对儒家精神的张扬,也有对其不足与缺陷的反思,这为我们重新审视儒家文化提供了新的视角和参照。     

Rubbery Polya Tree

Abstract. Polya trees (PT) are random probability measures which can assign probability 1 to the set of continuous distributions for certain specifications of the hyperparameters. This feature distinguishes the PT from the popular Dirichlet process (DP) model which assigns probability 1 to the set of discrete distributions. However, the PT is not nearly as widely used as the DP prior. Probably the main reason is an awkward dependence of posterior inference on the choice of the partitioning subsets in the definition of the PT. We propose a generalization of the PT prior that mitigates this undesirable dependence on the partition structure, by allowing the branching probabilities to be dependent within the same level. The proposed new process is not a PT anymore. However, it is still a tail‐free process and many of the prior properties remain the same as those for the PT.     

General saddlepoint approximations to distributions under an elliptical population

General saddlepoint approximations are derived for the distributions of statistics under an elliptical population. The technique is applied to obtain the tail probabilities of latent roots of a sample covariance matrix. It is shown that the method based on normalizing transformations by Tsuchiya and Konishi (1997) is efficient for the sample correlation coefficient in an elliptical sample.     

Uniform Asymptotic Estimates for Ruin Probabilities with Exponential Lévy Process Investment Returns and Two-sided Linear Heavy-tailed Claims

This paper investigates the ruin probabilities of a renewal risk model with stochastic investment returns and dependent claim sizes. The investment is described as a portfolio of one risk-free asset and one risky asset whose price process is an exponential Lévy process. The claim sizes are assumed to follow a two-sided linear process with independent and identically distributed step sizes. When the step-size distribution is heavy tailed, the paper establishes some uniform asymptotic formulas of ruin probabilities.     

Slowing Down Mobilities: Passengering on an Inter-war Ocean Liner

Abstract

This article contributes to recent work on the figure of the passenger and ‘passengering’ in mobilities research. It does so by considering the experiences of one passenger over two journeys on an ocean liner undertaken in 1930. The article ‘follows’ the passenger over the course of the two journeys in order to open up the processuality of passengering. The article makes two core contributions. First, it demonstrates the need to lend attention to the specific socialities and materialities of mobile modalities that work on and form the passenger. It is shown how specific assemblages come together at sea to create atmospheres that shape the experiences of long-distance travel over water. Second, by following the passenger over the course of journeying, it demonstrates the emergence of the passenger in relation to shifting affective atmospheres, not as a static figure but one of becoming passenger, as a shifting set of subjectivities, and, in turn, shows the value of ‘following’ a journey within mobilities research.     

TigerPlace,A State-Academic-Private Project to Revolutionize Traditional Long-Term Care

ABSTRACT

The Aging in Place Project at the University of Missouri (MU) required legislation in 1999 and 2001 to be fully realized. An innovative home health agency was initiated by the Sinclair School of Nursing specifically to help older adults age in place in the environment of their choice. In 2004, an innovative independent living environment was built and is operated by a private long term care company, as a special facility where residents can truly age in place and never fear being moved to a traditional nursing home unless they choose to do so. With care provided by the home care agency with registered nurse care coordination services, residents receive preventative and early illness recognition assistance that have markedly improved their lives. Evaluation of aging in place reveal registered nurse care coordination improves outcomes of cognition, depression, activities of daily living, incontinence, pain, and shortness of breath as well as delaying or preventing nursing home placement. Links with MU students, faculty, and nearly every school or college on campus enrich the lives of the students and residents of the housing environment. Research projects are encouraged and residents who choose to participate are enjoying helping with developing cutting technology to help other seniors age in place.     

Estimation of the frequency in cyclical long-memory series

Time series with cyclical long memory are characterized by a spectral pole at some frequency ω between 0 and π such that the series has a persistent cycle of period 2π/ω, implying a quasi-periodic behaviour that slightly evolves with time. Accurate estimation of ω is needed for a precise determination of the characteristic of the series (e.g. for business cycle determination or signal estimation). We propose a simple iterative algorithm of estimation of ω based on the maximizer of the periodogram evaluated at an increasingly finer grid of frequencies and compare its performance with more usual methods of estimation restricted to Fourier frequencies. We also apply this technique to the estimation of the frequency of the sunspot index and the business cycle of the differenced unemployment level of the USA.     

车尾语的认知语用探索—兼谈基于图样理论和关联理论的推理模式

车尾语已经成为一种独特的社会文化现象，人们对车尾语意义的理解离不开推理。就传统的推理而言，图样理论和关联理论各有其不足。本文旨在探求一种将二者结合起来的推理模式。研究结果表明，该模式可以更好地从认知语用的角度解读车尾语意义。