Savings–age profiles in the UK

We used UK Family Expenditure Surveys to analyse the relationship between savings and age structure. We address two key problems: the sample selection bias when data refer to households and not individuals, and the treatment of pension income when drawing inferences from individuals' savings–age profiles about the relationship between an economy's savings and age structure. Our principal findings are that household data exaggerate savings rates of young adults and the elderly whilst underestimating those of 45- to 60-year-olds, and individual saving rates follow more closely the ‘hump shape’ of the life-cycle model, although the savings rates of the elderly remain positive for some ages.

A person-centered perspective in assessing career adaptability: Potential profiles,outcomes, and antecedents

This study explored the career adaptability profiles and corresponding characteristics with a person-centered method as well as the correlation between career adaptability and various antecedents such as supervisor feedback setting and person-organization (P–O) fit, and outcomes such as psychological safety and self-efficacy. We employed a convenience sampling technique to invite more than 1000 employees from five provinces in China in 2 studies. There are 535 valid questionnaires in Study 1 and 377 valid questionnaires in Study 2. We performed latent profile analysis (LPA) using Mplus 7.31. For the antecedents, we ran the three-step estimation (R3STEP) command. In terms of outcomes, Binary Coded Hexadecimal (BCH) analysis was conducted. LPA identified four career adaptability profiles, namely, optimal, high, moderate, and low career adaptability. The four different profiles varied in the level, but not the shape. These profiles were predicted by antecedents of supervisor feedback environment and P–O fit, and these profiles impacted psychological safety and self-efficacy. We used a new approach to better understand career adaptability under the framework of career construction theory. A person-centered method, compared with a variable-centered approach, can elucidate the interactions among four dimensions of career adaptability in an employee. Thus, we demonstrated that (1) various career adaptability profiles at work generally do not consistently occur, and (2) latent profiles can distinguish antecedents from outcomes.     

A nonparametric mixture approach to density and null proportion estimation in large-scale multiple comparison problems

A new method for estimating the proportion of null effects is proposed for solving large-scale multiple comparison problems. It utilises maximum likelihood estimation of nonparametric mixtures, which also provides a density estimate of the test statistics. It overcomes the problem of the usual nonparametric maximum likelihood estimator that cannot produce a positive probability at the location of null effects in the process of estimating nonparametrically a mixing distribution. The profile likelihood is further used to help produce a range of null proportion values, corresponding to which the density estimates are all consistent. With a proper choice of a threshold function on the profile likelihood ratio, the upper endpoint of this range can be shown to be a consistent estimator of the null proportion. Numerical studies show that the proposed method has an apparently convergent trend in all cases studied and performs favourably when compared with existing methods in the literature.     

雕刻系统中的仿形测试与三维成型技术研究

介绍了作者对雕刻行业ＣＡＴ／ＣＡＤ／ＣＡＭ系统进行研究开发所发取得的部分成果，其中包括浮雕轮廓仿形ＣＡＴ装置的实现，测量数据的筛选与处理方法Ｄｍａｘ浮雕曲面造型算法及数控加工文件的形成等。     

Impact of early memories and current experiences of warmth and safeness on adolescents' psychological distress

A variable-centered and a person-centered approach were performed to examine the role of early memories of warmth and safeness (EMWS) and current experiences of warmth and safeness (CEWS) on depressive and anxious symptoms among adolescents from community and residential youth care (RYC) settings. Variable-centered results revealed EMWS were only indirectly (through CEWS) associated with depressive and anxious symptoms. Person-centered outcomes allowed to identify four different profiles based on EMWS and CEWS, which differed on depressive and anxious symptoms. EMWS and CEWS seem to play an important role in psychological distress during adolescence. CEWS seem to have a protective role on RYC adolescents' psychological distress, even when EMWS were poor.     

Preparing Black and Latinx children for police encounters: Caregiver response profiles and child self-regulation

We hypothesized that the goodness-of-fit between profiles of observed, caregiver-provided ethnic–racial socialization (ERS), and child self-regulation (i.e., inhibitory control) would differentially associate with child behavioral outcomes. Conversations between 80 caregivers (45% Latinx; 55% Black) and their children (M _age  = 11.09; 46% female) were rated for ERS. Measures included an inhibitory control composite (ages 2.5–3.5) and the Child Behavior Checklist (CBCL; age 12). Three profiles were determined: Comprehensive (n  = 34), Reactive (n  = 8), and Pragmatic (n  = 38). Only youth with low inhibitory control in preschool appeared to benefit from Pragmatic ERS, whereas youth with normative or high inhibitory control in early childhood displayed lower internalizing and externalizing behaviors when they had Comprehensive or Reactive rather than Pragmatic caregivers.     

凸轮轮廓的计算机辅助设计

该软件系统不仅可以对平面凸轮机构进行准确的运动分析、精确的凸轮设计，还可以对所设计的凸轮机构进行形象的运动模拟显示。