评价结构抗震动稳定性的能量测度

根据耗散结构理论提出了在地震过程中，结构的动稳定性是反映结构抗“大震”能力的重要表征，结构吸收的地震能量是评价结构动稳定性的性能测度，并推导了能量测度的有限元表达式，以拱坝结构为算例，拱坝的稳定性与能量测度之间的相关性表明，地震中结构的能量测度可评价结构的抗震稳定性。     

周期时变不确定性线性系统的MINIMAX控制方法

应用约束最优化方法和微分对策理论,讨论周期时变不确定性线性系统在范数有界外 部干扰情况下的MINIMAX控制和参数摄动情况下的MINIMAX控制.问题可解的充分条件 是一类Riccati微分方程具有稳定化解,且关于最坏扰动的某个附加条件满足相应的MINIMAX 控制恰为一个线性状态反馈.此外,还给出了闭环系统的性能指标的保证值.     

广义系统的H∞最优控制

研究连续广义系统的标准H2最优控制器的设计问题.利用线性分式变换方法给出该 系统的所有稳定化控制器的参数化形式,从而借助于两个广义H2代数Riccati方程和两个广义 Lyapunov方程,分别给出该系统的一个标准H2最优控制器的设计及最优H2范数的计算.最 后用一个算例进一步说明设计方法.     

科技文稿中不规范表格的修正

表格是记录数据或事物分类等的一种有效表达方式，在科技文稿中应用广泛。但是在很多文稿中　的表格存在这样那样的问题，往往不规范。规范的表格应该科学、明确、简洁，具有清晰的逻辑对比功能　　。     

Robust LQ Regulator for Jump Linear Systems with Uncertain Parameters

This paper deals with the robustness stabilizability of the class of linear systems with Markovian jumping parameters and unknown but bounded uncertainties. Under the assumption of the complete access to the system's states and its modes, we establish the robust stabilizability result under norm bounded uncertainties and also under structured uncertainties. We give the conditions under which the class of uncertain linear systems with jumping parameters will remain stable.     

Affecting the salience of the social responsibility norm: effects of past help on the response to dependency relationships.

A series of experiments by the authors assumes that many people in our society are motivated to aid others who are dependent upon them because such help is prescribed by a "social responsibility norm." The present study also assumes that prior help can increase the salience of this norm. In a 2 X 2 X 2 factorial design using 80 Ss (college women), ? of the Ss were individually helped by a peer (E's confederate) on a preliminary task, while the others were not aided. After this, the Ss worked on another task under the supposed supervision of yet another peer, with ? of the Ss being told the supervisor was highly dependent upon their work and the others told she was less dependent upon them. The 1st peer would supposedly learn of their work in ? of the cases but not in the other ?. The previously helped Ss tended to exert the greatest effort in behalf of their dependent peer. A self-report scale assessing social responsibility tendencies was significantly correlated with the effort measure in the Prior Help-High Dependency condition. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

正定Hermite矩阵特征值的相对扰动界

给出了正定Hermite矩阵特征值的一个新扰动界,同以往的结论相比我们的界形式上更简洁而且新的扰动界在合同变换下保持不变。     

基于Aduc845的数据采集与控制系统

本文设计并实现了一种基于Aduc845微处理器芯片的高精度数据采集与控制系统,主要包括模拟输入,采集,运算,输出控制,以及与计算机通讯等部分,并详细论述了基准信号的提取和采集信号的处理。该系统精度高,可靠性好,功能齐全,可广泛应用于传感器领域。     

A meta-analysis of the technology acceptance model: Investigating subjective norm and moderation effects

We conducted a quantitative meta-analysis of previous research on the technology acceptance model (TAM) in an attempt to make well-grounded statements on the role of subjective norm. Furthermore, we compared TAM results by taking into account moderating effects of one individual-related factor (type of respondents), one technology-related factor (type of technology), and one contingent factor (culture). Results indicated a significant influence of subjective norm on perceived usefulness and behavioral intention to use. Moderating effects were found for all three factors. The findings yielded managerial implications for both intra-company and market-based settings.     

Youth crowds and substance use: The impact of perceived group norm and multiple group identification.

The impact of group identity on adolescent tobacco, alcohol, and marijuana use was examined through a postal survey. The study included adolescents who identified with 1 subgroup (n = 1425) as well as adolescents who identified with 2 (n = 895) or 3 (n = 339) subgroups. The results showed that identification with the pop, skate/hip-hop, techno, and hippie subgroups was associated with higher risks of substance use, whereas identification with the sporty, quiet, computer nerd, and religious subgroups was associated with lower risks. Perceived group norm mediated the group identity-substance use relationship. Furthermore, identification with multiple groups with corresponding norm increased norm-consistent substance use, whereas identification with multiple groups with opposing norms reduced normative behavior. Implications for health promotion are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)