Tracing developmental trends in Ira Gordon's programs for children and families

Ira Gordon's work in the area of child and family services is traced for six of his programs according to two main trends: (1) perceptions of families through the years and the changing roles of parents in the education of their children; and (2) curriculum changes in activities brought into homes. Gordon's programs, some being initiated as early as 1966, focused upon parents, infants, toddlers, and school-age children and utilized home visitations as a major intervention strategy. Evidence of successes reported for these programs has shown the impact of early intervention upon children as well as their families, school, and community.     

ASP三元复合体系宏观流变特征研究

利用HAAKE RV-100旋转流变仪和TR-1加压式毛管粘度计,在10^-1s^-1~10⁴s^-1的剪切速率范围内,测定了不同配方的三元复合体系的流变特性。流变数据处理结果认为,三元复合体系流变性可用Carreau模型来描述。研究结果显示,在所研究的条件下(碱浓度0.5%~1.5%、聚合物浓度800 mg/L~1200 mg/L、表面活性剂浓度800~1200 mg/L),三元复合体系表现出类似于聚合物溶液的流变特征,在低剪切速率和高剪切速率下,体系表现出牛顿流体特征;在中等剪切速率下,呈现剪切变稀的流变特性。随着碱、表面活性剂浓度的增加,三元复合体系的零剪切粘度下降,剪切变稀性能减弱。     

现代英语名词动化类例

英语名词转化成动词时 ,根据其功能及特征 ,大致可分为人物型及工具型两大类。本文结合实例 ,论述了两大类转化的特点和意义     

Doing sociological research: the genre of ‘owning up’

This paper presents an account of an access encounter, and uses this case to reinforce the potential for access meetings to provide a rich source of ethnographic data. The paper originates from one of the authors' experience of negotiating research access in a UK local authority social services department. In response to a summary research proposal sent in advance that expressed interest in social work with men, a gatekeeper expressed his concern during an initial meeting that the author might be a ‘paedophile’ wanting to make contact with others of a similar persuasion. This encounter, and the issue of sexual abuse that it introduced, highlights a number of ethical, epistemological and gendered tensions for ethnographic work, which this paper attempts to negotiate. Some of the potential implications of this specific access meeting are discussed, and set within broader methodological and empirical contexts.     

改良型生物脱氮除磷水处理综述

现有的城市污水处理厂大多采用A2／O工艺，即英文Anaerobic—Anoxic—Oxic第一个字母的简称（生物脱氮除磷）。此法对污水除磷脱氮较为有效，但由于生物脱氮和生物除磷是相互矛盾的，所以其效果仍不理想。在此介绍一种改良的A2／O工艺，能大大改善污水除磷脱氮效果。     

Cox regression for current status data with mismeasured covariates

Covariate measurement error problems have been extensively studied in the context of right‐censored data but less so for current status data. Motivated by the zebrafish basal cell carcinoma (BCC) study, where the occurrence time of BCC was only known to lie before or after a sacrifice time and where the covariate (Sonic hedgehog expression) was measured with error, the authors describe a semiparametric maximum likelihood method for analyzing current status data with mismeasured covariates under the proportional hazards model. They show that the estimator of the regression coefficient is asymptotically normal and efficient and that the profile likelihood ratio test is asymptotically Chi‐squared. They also provide an easily implemented algorithm for computing the estimators. They evaluate their method through simulation studies, and illustrate it with a real data example. The Canadian Journal of Statistics 39: 73–88; 2011 © 2011 Statistical Society of Canada