光纤陀螺随机误差特性ThêoH辨识

随机误差特性分析是光纤陀螺进入工程应用阶段的关键技术.针对Allan方差、总方差、Thêo1 (Theoretical variance #1)等分析方法的不足,以Thêo1为基础,通过偏差消除获得ThêoBR(Bias-removed ver?sion of Thêo1),并将其与Allan方差合成,得到光纤陀螺随机误差特性分析的ThêoH(Hybrid-ThêoBR)法.通过计算重叠Allan方差、总方差、Thêo1以及ThêoH的等效自由度,结合仿真和实测信号的随机误差特性分析实验,证明ThêoH法不仅提高了Allan方差估计的置信度,且解决了Thêo1估计有偏的问题,表明了该方法是目前能够有效辨识光纤陀螺随机误差特性的最佳方法.     

时效热处理对镍基单晶高温合金组织的影响

 研究了经不同时效热处理后一种镍基单晶高温合金γ′相的形貌。结果表明：不同的时效热处理制度对所研究镍基单晶高温合金γ′相形貌影响显著。一次时效处理使固溶态γ′相平均尺寸增大;1 080 ℃×6 h一次时效+〖JP〗二次时效处理对γ′相平均尺寸的影响不明显,只加强了γ′相的规则度;1 050 ℃×16 h一次时效+二次时效处理时,γ′相尺寸増长显著。合金经850 ℃×24 h二次时效后,γ′/γ基体通道中均有更细小的二次或三次γ′相析出。     

Positive psychology 2.0: Towards a balanced interactive model of the good life.

This paper first describes the growing pains and challenges of the positive psychology (PP) movement and identifies the four pillars of the good life as meaning, virtue, resilience, and well-being, which are all shaped by culture. I then introduce three issues that characterise the second wave of PP (referred to as PP 2.0). The first concerns the need for a comprehensive taxonomy of PP. The second involves the hypothesis that meaning-orientation and happiness-orientation represent two different visions of the good life with profound practical implications. Eudaimonia is viewed as meaning plus virtue. The third issue concerns a dual-systems model as a way to integrate the complex interactions between the negatives and positives to optimise positive outcomes in various situations. I conclude that PP 2.0 is characterised by a balanced, interactive, meaning-centered, and cross-cultural perspective. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Overestimated relationships with subjective well-being.

This article is about relationships between subjective well-being (SWB) and variables such as demographics, intentional activities, personality traits, and personal characteristics. Causal interpretation of these relationships is usually asymmetric from the variable to SWB, although the literature also contains interpretations of reverse or bidirectional causality. Evidence reviewed here suggests that heritable personality traits may underlie some of these relationships. A consequence is that covariance may be lower than lower than indicated by phenotypic (within individual) correlations. The article discusses some implications for positive psychology. (PsycINFO Database Record (c) 2011 APA, all rights reserved)