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411.
    
With the continued development of unmanned aerial vehicle (UAV) technologies, the UAV on-board automation is increasingly more capable of performing tasks formerly done by human operators. Thereby, the role of UAVs is changing from being mere tools to become members of integrated manned-unmanned systems. However, the high automation necessary to achieve this cooperation, introduces a new set of negative effects for the human operator such as complacency or automation bias. Adaptive assistance is one approach to counteract these negative effects seen in human-automation-interaction. To enable adaptive assistance, we present a cognitive state estimation framework for a MUM-T aircraft application. The goal of this approach is to assess attention allocation and SA of a pilot in real-time and identify possible breakdowns in the situational picture that could cause performance decrements and errors. The design of a MUM-T cockpit simulator is presented to describe how this cognitive state estimation framework is integrated into a human-autonomy-teaming environment. The results of initial simulator experiments are presented and areas of further research are identified.  相似文献   
412.
    
Propagated activation of neurons through their network is an important process in the brain. Another crucial part of neural processing concerns adaptation over time of characteristics of this network such as connection strengths or excitability thresholds. This adaptation can be slow, as in learning from a multiple experiences, or it can be fast, as in memory formation. These adaptive network characteristics can be considered informational criteria for activation of a neuron. This then is viewed as a form of emergent information formation. Activation of neurons is determined by such information via a process termed criterial causation. In the current paper, the relationship of criterial causation with the principle of temporal factorisation for the dynamics of the world in general is explored. Temporal factorisation describes how the world represents information about its past in its present state, which then in turn determines the world’s future. In the paper, it is shown how these processes are analysed in more detail and modeled by (adaptive) network models.  相似文献   
413.
    
Cognitive systems face a tension between stability and plasticity. The maintenance of long-term representations that reflect the global regularities of the environment is often at odds with pressure to flexibly adjust to short-term input regularities that may deviate from the norm. This tension is abundantly clear in speech communication when talkers with accents or dialects produce input that deviates from a listener's language community norms. Prior research demonstrates that when bottom-up acoustic information or top-down word knowledge is available to disambiguate speech input, there is short-term adaptive plasticity such that subsequent speech perception is shifted even in the absence of the disambiguating information. Although such effects are well-documented, it is not yet known whether bottom-up and top-down resolution of ambiguity may operate through common processes, or how these information sources may interact in guiding the adaptive plasticity of speech perception. The present study investigates the joint contributions of bottom-up information from the acoustic signal and top-down information from lexical knowledge in the adaptive plasticity of speech categorization according to short-term input regularities. The results implicate speech category activation, whether from top-down or bottom-up sources, in driving rapid adjustment of listeners' reliance on acoustic dimensions in speech categorization. Broadly, this pattern of perception is consistent with dynamic mapping of input to category representations that is flexibly tuned according to interactive processing accommodating both lexical knowledge and idiosyncrasies of the acoustic input.  相似文献   
414.
    
In this paper we investigated if keeping the driver in the perception–action loop during automated driving can improve take-over behavior from conditionally automated driving. To meet this aim, we designed an experiment in which visual exposure (perception) and manual control exposure (action) were manipulated. In a dynamic driving simulator experiment, participants (n = 88) performed a non-driving related task either in a head-up display in the windshield (high visual exposure) or on a head-down display near the gear shift (low visual exposure). While driving, participants were either in an intermittent control-mode with four noncritical take-over situations (high manual control exposure), or in a continuous automation-mode throughout the ride (low manual control exposure). In all conditions, a critical take-over had to be carried out after an approximately 13 min ride. Measurements of take-over behavior showed that only high visual exposure had an effect on hands-on reaction time measurements. Both visual exposure and manual control exposure had small to medium sized main effects on time to system deactivation, the maximum velocity of the steering wheel, and the standard deviation of the steering wheel angle. The combined high visual – and high manual control exposure condition led to 0.55 s faster reaction time and 37% less steering variability in comparison to the worst case low visual – and low manual control exposure condition. Together, results corroborate that maintaining visual exposure and manual control exposure during automated driving can be efficacious and suggest that their positive effects are additive.  相似文献   
415.
This qualitative study used in-depth interviews to explore the communicative experiences and coping strategies of 14 adults who stammer. Their accounts revealed that those participants with persistent developmental dysfluency felt that stammering had limited their lives especially in the areas of employment, education and self-esteem. All participants shared key styles of communicative management with avoidance and confrontation developing during childhood. The participants who had undertaken therapy during adulthood, relied upon a range of speech management techniques including self-evolved and therapeutic strategies. Many of the strategies regularly used by the respondents contributed to the limiting experience of stammering. This study highlights the experience of stammering on the individual, discusses the variety of strategies used to manage dysfluency and indicates the complexities of day-to-day communication. These findings are discussed in relation to speech and language therapy for adults who stammer.

Educational objectives: The reader will learn about and be able to give examples of: (1) the lived experience of stammering; (2) the communicative strategies used by adults; and (3) the situational management of stammering.  相似文献   

416.
417.
Child executive functions (cognitive flexibility, inhibitory control, working memory) are key to success in school. Cortisol, the primary stress hormone, is known to affect cognition; however, there is limited information about how child cortisol levels, parenting factors and child care context relate to executive functions in young children. The aim of this study was to examine relationships between child cortisol, parenting stress, parent coping, and daycare quality in relation to executive functions in children aged 3–5 years. We hypothesized that (1) poorer executive functioning would be related to higher child cortisol and higher parenting stress, and (2) positive daycare quality and positive parent coping style would buffer the effects of child cortisol and parenting stress on executive functions. A total of 101 children (53 girls, 48 boys, mean age 4.24 years ±0.74) with complete data on all measures were included. Three saliva samples to measure cortisol were collected at the child’s daycare/preschool in one morning. Parents completed the Behavior Rating Inventory of Executive Function – Preschool Version (BRIEF-P), Parenting Stress Index (PSI), and Ways of Coping Questionnaire (WCQ). The Early Childhood Environment Rating Scale – Revised (ECERS-R) was used to measure the quality of daycare. It was found that children with poorer executive functioning had higher levels of salivary cortisol, and their parents reported higher parenting stress. However, parent coping style and quality of daycare did not modulate these relationships. Identifying ways to promote child executive functioning is an important direction for improving school readiness.  相似文献   
418.
The aim of the current study was to examine differences in personality, coping skills, and select psychopathology symptoms in psychiatric patients with and without non-suicidal self-injury and/or suicide attempts. We collected data in a sample of 128 psychiatric patients by means of self-report questionnaires measuring self-harm, psychological symptoms, personality and coping skills. Results support a continuum of self-harm such that patients with both non-suicidal self-injury and suicide attempts exhibit significantly greater levels of psychopathology and lower levels of adaptive personality traits and coping skills. The findings point to the clinical importance of making a distinction between non-suicidal self-injury and suicide attempts, and offers additional variables to consider outside of intent when appraising suicide risk.  相似文献   
419.
Families are influential systems and may be an important context in which to consider the stress and coping process. To date, many studies have focused on modeling the stress and coping process for the individual, isolated from the family. The purpose of this secondary analysis was to investigate a cross-sectional stress and coping model for HIV-positive African-American mothers recruited from HIV service facilities in South Florida (n=214) and their family members (n=294). Avoidance coping was hypothesized to mediate the relationship between stress and psychological distress. In addition, the family average of individual stress was hypothesized to moderate the relationship between avoidance coping and psychological distress. For all constructs, individuals reported on themselves and multilevel modeling techniques were used to account for similarities between members of the same family. The estimated mediation effect was significant. Aggregated family stress significantly moderated the relationship between avoidance coping and psychological distress. This study suggests that individuals exhibit different relationships between avoidance coping and psychological outcomes and that average stress reported by members of a family moderates the relationship between avoidance coping and psychological distress.  相似文献   
420.
The associations among emotional intelligence (EI), coping, personality and exam‐related stress in a group of 475 Canadian undergraduate students were examined. Stress was measured at the start of the semester and again in the pre‐exam period. Higher levels of stress were associated with lower scores on EI components, and higher scores on emotion‐focused coping and neuroticism. A scale‐level factor analysis of the EI and coping subscales produced three composite factors, which each had high loadings from at least one EI and one coping subscale. The associations of the Emotion Regulation factor (high loadings of several EI components and emotion‐focused coping) and the Task Focus factor (high loadings of Adaptability EI and task‐focused coping) with personality, stress and subjective wellbeing (SWB) were examined using structural equation modelling. The results showed that these factors mediated the effect of personality on stress and SWB.  相似文献   
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