Analyzing developmental processes on an individual level using nonstationary time series modeling.

Individuals change over time, often in complex ways. Generally, studies of change over time have combined individuals into groups for analysis, which is inappropriate in most, if not all, studies of development. The authors explain how to identify appropriate levels of analysis (individual vs. group) and demonstrate how to estimate changes in developmental processes over time using a multivariate nonstationary time series model. They apply this model to describe the changing relationships between a biological son and father and a stepson and stepfather at the individual level. The authors also explain how to use an extended Kalman filter with iteration and smoothing estimator to capture how dynamics change over time. Finally, they suggest further applications of the multivariate nonstationary time series model and detail the next steps in the development of statistical models used to analyze individual-level data. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A quantitative identification technique for a two‐dimensional subsurface defect based on surface temperature measurement

The inverse identification of a subsurface defect boundary is an important part of an inverse heat conduction problem, and is also the basis for the quantitative development of a nondestructive thermographic inspection technique. For the commonly encountered quantitative thermographic defect identification problem when the test piece is heated from one part of the outer boundary, our previous study showed that some parts of the defect boundary are sensitive to the initial defect boundary prediction of the conjugate gradient method. In this paper, the heat transfer mechanism inside a test piece with this problem is analyzed by building a two‐dimensional model. A new method, the multiple measurements combination method (MMCM), is also presented which combines the identification algorithm study with the optimization of the thermographic detection technique to solve the problem. Numerical experiments certified the effectiveness of the present method. The temperature measurement error and the initial prediction of the defect boundary shape have little effect on the identification result. © 2009 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/htj.20251     

The power of multiple methods and evidence sources: Raising the profile of Canadian counselling psychology research.

In counselling psychology, research and practice are viewed as mutually informative, and Canadian counselling psychologists conduct research in a wide range of areas, utilizing a wide range of research methods. However, there are few Canadian publications that give prominence to counselling psychology scholarly work. Over the past decade, two trends have become more prominent in the practice of counselling psychology: evidence-based practice and outcome-focused intervention. Traditionally, empirical evidence for the efficacy of practice interventions has come from randomized controlled trials. This fails to reflect the diversity of methods and practice that Canadian counselling psychologists utilize. To address this discrepancy, in this article we provide some alternate ways for obtaining empirical support for the predictive efficacy of counselling interventions. We conclude by addressing some challenges currently facing counselling psychologists in Canada (i.e., publication venues, funding for research, the connection between research and practice, preparation of students) and describing some ways for raising the profile of counselling psychology research and practice in Canada. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Soft sensor for continuous product quality estimation (in crude distillation unit)

Due to the strict norm requirements of keeping products in crude refining units within specifications, laboratory testing and quality control of the products are necessary. Given this reason, virtual soft sensor for continuous quality estimation of light naphtha as the crude distillation unit (CDU) product was developed. Experimental data included available continuous measurements of CDU process streams (temperatures, pressures and flowrate) and laboratory analyses undertaken twice a day. The results are soft sensor models for light naphtha vapor pressure (RVP) estimation.Soft sensor models have been developed conducting multiple linear regression analysis and using neural network-based models such as LNN, MLP and RBF. Considering statistical and sensitivity analysis, the best results for both oils were obtained with MLP and RBF neural networks. The results show possible application of the soft sensor models for estimating light naphtha RVP as an alternative for laboratory testing.     

以轨道交通支持天津市城市空间结构转化——天津市市域轨道交通系统规划

交通系统与城市空间结构是相互联系、相互推动的关系。轨道交通作为现代化、快速、大运量的客运系统,对城市空间演变发挥着重要作用。随着城市的快速发展,天津市的空间布局面临着重大转变。天津的市域轨道交通系统规划,以城市空间发展战略为依托,以积极引导天津市空间结构转化为目标,规划构建包括市域线及城区线两级线网、全市域联网互动的轨道交通网络。     

单立管排水系统与多立管排水系统的比较研究

本文针对单立管排水系统的特点和多立管排水系统的类型和特点进行阐述,将其在不同建筑类型中的经济和使用技术进行比较和综合的分析。     

A fuzzy goal programming model for the simple U-line balancing problem with multiple objectives

A fuzzy goal programming model for the simple U-line balancing (SULB) problem with multiple objectives is presented. In real life applications of the SULB problem with multiple objectives, it is difficult for the decision-maker(s) to determine the goal value of each objective precisely as the goal values are imprecise, vague, or uncertain. Therefore a fuzzy goal programming model is developed for this purpose. The proposed model is the first fuzzy multi-objective decision-making approach to the SULB problem with multiple objectives which aims at simultaneously optimizing several conflicting goals. The proposed model is illustrated using an example. A computational study is conducted by solving a large number of test problems to investigate the relationship between the fuzzy goals and to compare them with the goal programming model proposed by Gökçen and A?pak (Gökçen, H. and A?pak, K., European Journal of Operational Research, 171, 577–585, 2006). The results of the computational study show that the proposed model is more realistic than the existing models for the SULB problem with multiple objectives and also provides increased flexibility for the decision-maker(s) to determine different alternatives.     

Stabilization of controlled positive discrete‐time T‐S fuzzy systems by state feedback control

This paper deals with sufficient conditions of asymptotic stability and stabilization for nonlinear discrete‐time systems represented by a Takagi–Sugeno‐type fuzzy model whose state variables take only nonnegative values at all times t for any nonnegative initial state. This class of systems is called positive systems. The conditions of stabilizability are obtained with state feedback control. This work is based on multiple Lyapunov functions. The results are presented in linear matrix inequalities form. A real plant is studied to illustrate this technique. Copyright © 2010 John Wiley & Sons, Ltd.     

初探建设工程质量危机管理体系的建构

主要从建设行政主管部门的角度,针对建设工程潜在或发生的质量危机,探讨了建设工程质量危机管理体系的建构与完善,为科学地实施建设工程质量危机管理提供理论依据。