Optimal LQG controller for linear stochastic systems with unknown parameters   总被引：1，自引：0，他引：1  

Michael Basin  Dario Calderon-Alvarez 《Journal of The Franklin Institute》2008,345(3):293-302

This paper presents the optimal LQG controller for linear systems with unknown parameters. The optimal controller equations are obtained using the separation principle, whose applicability to the considered problem is substantiated. Performance of the obtained optimal controller is verified in the illustrative example against the conventional LQG controller that is optimal for linear systems with known parameters. Simulation graphs verifying overall performance and computational accuracy of the designed optimal controller are included.  相似文献   

Introduction to special section “Bridging from user needs to deployed applications of social robots”     

Filippo Cavallo  Paolo Dario  Leopoldina Fortunati 《The Information Society》2018,34(3):127-129

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Special features of electronic journals: do physicians want them?     

Torre DM  Wright SM  Wilson RF  Diener-West M  Bass EB 《Health information and libraries journal》2003,20(2):108-111

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Materialist discourse in academia during the age of late marxism     

Dario Fernández-Morera 《Academic Questions》1991,4(2):15-29

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Preventive thermographic diagnosis of historical buildings for consolidation     

Domenica Paoletti  Dario Ambrosini  Stefano Sfarra  Fabio Bisegna 《Journal of Cultural Heritage》2013,14(2):116-121

Conserving architectural heritage usually requires a multidisciplinary approach involving a variety of professionals and organizations. Since the evaluation of the state of conservation of historical buildings using destructive techniques should be avoided to prevent the integrity of the cultural heritage, the development of non-destructive and non-contact techniques is very important. InfraRed (IR) thermography is a non-destructive powerful tool for fast and accurate building diagnostics. In the investigation of historical structures, where a restoration or conservation treatment can cause irreversible damage to the structure, it is considered to be of most importance. A campaign of thermographic surveys were conducted on a large part of the historical cultural heritage of L’Aquila and its surroundings. In this paper we present the results of the study for the Church of Santa Maria ad Cryptas (XIII century), one of the most ancient buildings in the surroundings of L’Aquila and one of the best examples of Gothic art in Abruzzo, with the aim to evaluate the correspondence between the damage induced by the earthquake and the previous thermographic results, in order to validate the effectiveness of thermography and its role in preventive diagnosis.  相似文献   

Attributions and Attitudes of Mothers and Fathers in Italy     

Bombi AS  Pastorelli C  Bacchini D  Di Giunta L  Miranda MC  Zelli A 《Parenting, science and practice》2011,11(2-3):129-141

OBJECTIVE: The present study examined mean level similarities and differences as well as correlations between mothers' and fathers' attributions regarding successes and failures in caregiving situations and progressive versus authoritarian attitudes. DESIGN: Interviews were conducted with both mothers and fathers in 177 Italian families from Rome and Naples. RESULTS: Fathers' attributions reflected higher perceived control over failure than did mothers' attributions, whereas mothers reported attitudes that were more progressive than did fathers. Only the difference in progressive attitudes remained significant after controlling for parents' age, education, and possible social desirability bias. Site differences emerged for four of the seven attributions and attitudes examined; three remained significant after controlling for parents' age, education, and possible social desirability bias. Medium effect sizes were found for concordance between parents in the same family for authoritarian attitudes and modernity of attitudes after controlling for parents' age, education, and possible social desirability bias. CONCLUSIONS: This work elucidates ways that parent gender and cultural context relate to attributions regarding parents' success and failure in caregiving situations and to progressive versus authoritarian parenting attitudes.  相似文献   

Life under flow: A novel microfluidic device for the assessment of anti-biofilm technologies     

Maria Salta  Lorenzo Capretto  Dario Carugo  Julian A. Wharton  Keith R. Stokes 《Biomicrofluidics》2013,7(6)

In the current study, we have developed and fabricated a novel lab-on-a-chip device for the investigation of biofilm responses, such as attachment kinetics and initial biofilm formation, to different hydrodynamic conditions. The microfluidic flow channels are designed using computational fluid dynamic simulations so as to have a pre-defined, homogeneous wall shear stress in the channels, ranging from 0.03 to 4.30 Pa, which are relevant to in-service conditions on a ship hull, as well as other man-made marine platforms. Temporal variations of biofilm formation in the microfluidic device were assessed using time-lapse microscopy, nucleic acid staining, and confocal laser scanning microscopy (CLSM). Differences in attachment kinetics were observed with increasing shear stress, i.e., with increasing shear stress there appeared to be a delay in bacterial attachment, i.e., at 55, 120, 150, and 155 min for 0.03, 0.60, 2.15, and 4.30 Pa, respectively. CLSM confirmed marked variations in colony architecture, i.e.,: (i) lower shear stresses resulted in biofilms with distinctive morphologies mainly characterised by mushroom-like structures, interstitial channels, and internal voids, and (ii) for the higher shear stresses compact clusters with large interspaces between them were formed. The key advantage of the developed microfluidic device is the combination of three architectural features in one device, i.e., an open-system design, channel replication, and multiple fully developed shear stresses.  相似文献   

Longitudinal Trajectories of Four Domains of Parenting in Relation to Adolescent Age and Puberty in Nine Countries     

Jennifer E. Lansford  W. Andrew Rothenberg  Jillian Riley  Liliana Maria Uribe Tirado  Saengduean Yotanyamaneewong  Liane Peña Alampay  Suha M. Al-Hassan  Dario Bacchini  Marc H. Bornstein  Lei Chang  Kirby Deater-Deckard  Laura Di Giunta  Kenneth A. Dodge  Sevtap Gurdal  Qin Liu  Qian Long  Patrick S. Malone  Paul Oburu  Concetta Pastorelli  Ann T. Skinner  Emma Sorbring  Sombat Tapanya  Laurence Steinberg 《Child development》2021,92(4):e493-e512

Children, mothers, and fathers in 12 ethnic and regional groups in nine countries (N = 1,338 families) were interviewed annually for 8 years (M_age child = 8–16 years) to model four domains of parenting as a function of child age, puberty, or both. Latent growth curve models revealed that for boys and girls, parents decrease their warmth, behavioral control, rules/limit-setting, and knowledge solicitation in conjunction with children’s age and pubertal status as children develop from ages 8 to 16 across a range of diverse contexts, with steeper declines after age 11 or 12 in three of the four parenting domains. National, ethnic, and regional differences and similarities in the trajectories as a function of age and puberty are discussed.  相似文献   

Cross-Cultural Associations of Four Parenting Behaviors With Child Flourishing: Examining Cultural Specificity and Commonality in Cultural Normativeness and Intergenerational Transmission Processes     

W. Andrew Rothenberg  Jennifer E. Lansford  Marc H. Bornstein  Liliana Maria Uribe Tirado  Saengduean Yotanyamaneewong  Liane Peña Alampay  Suha M. Al-Hassan  Dario Bacchini  Lei Chang  Kirby Deater-Deckard  Laura Di Giunta  Kenneth A. Dodge  Sevtap Gurdal  Qin Liu  Qian Long  Patrick S. Malone  Paul Oburu  Concetta Pastorelli  Ann T. Skinner  Emma Sorbring  Sombat Tapanya  Laurence Steinberg 《Child development》2021,92(6):e1138-e1153

Families from nine countries (N = 1,338) were interviewed annually seven times (M_age child = 7–15) to test specificity and commonality in parenting behaviors associated with child flourishing and moderation of associations by normativeness of parenting. Participants included 1,338 children (M = 8.59 years, SD = 0.68, range = 7–11 years; 50% girls), their mothers (N = 1,283, M = 37.04 years, SD = 6.51, range = 19–70 years), and their fathers (N = 1,170, M = 40.19 years, SD = 6.75, range = 22–76 years) at Wave 1 of 7 annual waves collected between 2008 and 2017. Families were recruited from 12 ethnocultural groups in nine countries including: Shanghai, China (n = 123); Medellín, Colombia (n = 108); Naples (n = 102) and Rome (n = 111), Italy; Zarqa, Jordan (n = 114); Kisumu, Kenya (n = 100); Manila, Philippines (n = 120); Trollhättan & Vänersborg, Sweden (n = 129); Chiang Mai, Thailand (n = 120); and Durham, NC, United States (n = 110 White, n = 102 Black, n = 99 Latinx). Intergenerational parenting (parenting passed from Generation 1 to Generation 2) demonstrated specificity. Children from cultures with above-average G2 parent warmth experienced the most benefit from the intergenerational transmission of warmth, whereas children from cultures with below-average G2 hostility, neglect, and rejection were best protected from deleterious intergenerational effects of parenting behaviors on flourishing. Single-generation parenting (Generation 2 parenting directly associated with Generation 3 flourishing) demonstrated commonality. Parent warmth promoted, and parent hostility, neglect, and rejection impeded the development of child flourishing largely regardless of parenting norms.  相似文献   

Associations Between Perceived Material Deprivation,Parents’ Discipline Practices,and Children's Behavior Problems: An International Perspective     

Anika Schenck-Fontaine  Jennifer E. Lansford  Ann T. Skinner  Kirby Deater-Deckard  Laura Di Giunta  Kenneth A. Dodge  Paul Oburu  Concetta Pastorelli  Emma Sorbring  Laurence Steinberg  Patrick S. Malone  Sombat Tapanya  Liliana M. Uribe Tirado  Liane P. Alampay  Suha M. Al-Hassan  Dario Bacchini  Marc H. Bornstein  Lei Chang 《Child development》2020,91(1):307-326

This study investigated the association between perceived material deprivation, children's behavior problems, and parents’ disciplinary practices. The sample included 1,418 8- to 12-year-old children and their parents in China, Colombia, Italy, Jordan, Kenya, the Philippines, Sweden, Thailand, and the United States. Multilevel mixed- and fixed-effects regression models found that, even when income remained stable, perceived material deprivation was associated with children's externalizing behavior problems and parents’ psychological aggression. Parents’ disciplinary practices mediated a small share of the association between perceived material deprivation and children's behavior problems. There were no differences in these associations between mothers and fathers or between high- and low- and middle-income countries. These results suggest that material deprivation likely influences children's outcomes at any income level.  相似文献