Modeling censored data using modified lambda family

In the present article we propose the modified lambda family (MLF) which is the Freimer, Mudholkar, Kollia, and Lin (FMKL) parametrization of generalized lambda distribution (GLD) as a model for censored data. The expressions for probability weighted moments of MLF are derived and used to estimate the parameters of the distribution. We modified the estimation technique using probability weighted moments. It is shown that the distribution provides reasonable fit to a real censored data.     

分段启动压力对宝浪油田驱动压差的影响

摘要：渗透率低于 10 mD 的特低渗储层与平均渗透率大于 20 mD 的低渗储层开发技术政策界限和开发方案制定等有很大的差别，渗透率越低，其启动压力成倍增加，这就影响了开发技术和方案的制定。应用分段启动压力梯度进行分段计算并进行对比，计算结果表明：用同一启动压力梯度计算的结果不符合实际情况，而应用分段启动压力梯度计算的结果更能很好地反映特低渗储层的实际情况；井距对较高渗透率的驱动压力计算影响并不大，但对于特低渗储层的驱动压力计算则影响很大。     

比较优势动态递减概率模型及检验

在比较优势的持续时间是随机变量的条件下,文章运用不确定性数学方法和规范方法,推出了比较优势递减定理,认为比较优势会随着时间增加而递减,具有发散效应,即比较优势不会被锁定.推出的比较优势“无记忆性”定理表明,各国遵循比较优势发展国际贸易是正确的,国际贸易会让各个国家自动寻找到适合本国的比较优势.通过定义比较优势逆转概率,运用实证方法进行研究,研究表明比较优势基本符合比较优势递减定理和“无记忆性”定理内容,认为中国传统劳动密集型优势在逐渐减小,产业结构调整非常成功,逐渐拥有资本密集型优势和技术密集型优势,产业结构越来越合理.     

巨变与定型:经济地理格局中的城市能级与层级态势研究

当前,中国城市经济地理格局正处于前所未有的巨变中。这种巨变体现在两个层面:一是城市的能级不断跃升,二是城市的层级基本定型。能级跃升与层级定型的矛盾,是当代中国城市经济地理格局中的客观现实。这意味着,对于雄心勃勃的强二线城市来说,能级继续跃升的空间依然很大,但想在层级上与一线城市比肩,几无可能。故,对强二线城市来说,更好的选择是尊重近40年改革开放所形成的城市层级秩序,把方向与精力放在提升城市能级上。     

Discursive psychology as a method of analysis for the study of couple and family therapy

The field of couple and family therapy has benefitted from evidence generated from qualitative approaches. Evidence developed from approaches relying on language and social interaction using naturally occurring recordings of real‐world practice has the benefit of facilitating practice‐based recommendations and informing practice. The aim of this article is to provide an overview of one approach to discourse analysis, Discursive Psychology (DP), demonstrating how a social constructionist framework and focus on discourse can provide an important contribution to the field of therapy. To illustrate the methodological decision‐making process for researchers and/or practitioners who utilize DP, we draw upon a video‐recorded therapeutic session involving Tom Andersen. To conclude, we make recommendations for practitioners using DP to explore and examine therapeutic practice.     

论语法化的理论内涵

从20世纪80年代语法化研究复兴至今,国内外的语法化研究都取得了丰硕成果,但也存在很多的分歧和争论。"什么是语法化?"这是语法化研究的本体问题,也是必须回答的首要问题。很多学者基于各自的研究思路和研究立场,对语法化的内涵作出了不同界定,但大多难以涵盖语法化的各种现象和领域。在语法化研究与类型学、构式语法等语言学前沿领域相结合,不断向更加广泛和深入的方向发展的今天,我们有必要对语法化的内涵加以梳理并对语法化的核心问题做进一步的讨论。     

THE HARDER THE TASK,THE HIGHER THE SCORE: FINDINGS OF A DIFFICULTY BIAS

Studies have found that going first or last in a sequential order contest leads to a biased outcome, commonly called order bias (or primacy and recency). Studies have also found that judges have a tendency to reward contestants they recognize with additional points, called reference bias. Controlling for known biases, we test for a new type of bias we refer to as “difficulty bias,” which reveals that athletes attempting more difficult routines receive higher execution scores, even when difficulty and execution are judged separately. Despite some identification challenges, we add to the literature by finding strong evidence of a difficulty bias in gymnastics. We also provide generalizations beyond athletics. (JEL L10, L83, D81, J70, Z1)     

Assessing the Validity and Reliability of the Perceptions of the Consent to Sex Scale

Although sexual assault prevention education tends to focus on consent promotion as a means to reduce rates of sexual assault, little is known about how college students consent to sexual activity. The current study aimed to better understand college students' consent via the systematic development of the Consent to Sex Scale (CSS), utilizing mixed methods via three phases and two waves of data collection. In Phase 1, qualitative data were collected from college students (n = 185) to provide a foundation for item writing. In Phase 2, closed-ended items were written for a quantitative instrument and reviewed by a team of experts. In Phase 3, a quantitative survey, including items written in Phase 2, was administered to college students (n = 685); the measure was assessed for its psychometric properties. Exploratory factor analysis was utilized, resulting in a five-factor solution. The CSS and corresponding factors demonstrated high internal consistency reliability and expected gender differences, supporting the construct validity of the measure. The CSS assesses college students' cues for indicating consent to sex, a construct not addressed by previous measures. The validated scale may be useful in future research to better understand how consent relates to other behaviors or constructs.