Qu C.,South China Normal University |
Huang Y.,South China Normal University |
Wang Y.,South China Normal University |
Huang Y.-X.,Beijing Normal University |
Huang Y.-X.,Beijing NormalUniversity
Frontiers in Human Neuroscience | Year: 2013
Behavioral studies demonstrate that the timing of receiving gains or losses affects decision-making, a phenomenon known as temporal discounting, as participants are inclined to prefer immediate rewards over delayed ones and vice versa for losses. The present study used the event-related potential technique with a simple gambling task to investigate how delayed rewards and losses affected the brain activity in outcome evaluations made by 20 young adults. Statistical analysis revealed a larger feedback-related negativity (FRN) effect between loss and gain following immediate outcomes than following future outcomes. In addition, delay impacted FRN only in gain conditions, with delayed winning eliciting a more negative FRN than immediate winning. These results suggest that temporal discounting and sign effect could be encoded in the FRN in the early stage of outcome evaluation. © 2013 Qu, Huang, Wang and Huang.
Liu J.,Beijing NormalUniversity |
Deng X.,CAS Beijing Institute of Geographic Sciences and Nature Resources Research |
Deng X.,Chinese Academyof science
Journal of Food, Agriculture and Environment | Year: 2011
The urban air temperature is gradually rising in all cities in the world. Records of the past years showed that the climate of built-up regions differs significantly from rural regions. One of the most obvious and important modifying effects of urbanization on local climate is the urban heat island (UHI). In order to clarify the spatial distribution of urban thermal field and to evaluate the urban environment quality synthetically, 5 sites including Xidan, the commercial centre of Beijing district; Mudanyuan, the residential areas; Kunming Lake in Summer Palace, the water body; Chaoyang Park, the urban green space; and Wenquan Village, the suburb of Beijing, were investigated from December 2007 to August 2008. The meteorological factors of temperature and humidity of underlying surfaces in these 5 sites were monitored simultaneously in 10 hours period. The results indicate that the temperatures of underlying surfaces in different sampled landscapes were in the order of suburb
Kong X.,Beijing NormalUniversity |
He J.,Hebei NormalUniversity |
Li Y.,Beijing NormalUniversity |
Kou S.-P.,Beijing NormalUniversity |
Liang Y.,Beijing NormalUniversity
European Physical Journal B | Year: 2016
Spin-half paramagnetism induced by point detects was found in graphene recently,micromechanism of this magnetic response can be explained well by the intrinsic magneticimpurity theory. In this paper, we apply this theory to two types of single-walled carbonnanotubes (SWCNs) and calculate the properties of various magnetic interactions forcomparison. Interestingly, magnetic interactions have different behaviors in thesesystems. Following our calculation, within a short length, the interactions can besuppressed by ether size effect or a tiny band gap, and then exhibit exponentiallydecaying. However, in the absence of a band gap, the RKKY interaction could leave a tinytail at long range, which determines long range magnetic order. Further more, when a tinyband gap exist in the systems, the Heisenberg coupling is the dominate one due to theexpanded wavefunction. According to these result, vacancy states in different types ofSWCNs could form different magnetic order, bringing abundant candidates forapplication. © 2016, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Liang Y.,Beijing NormalUniversity |
Li H.,Chinese Academy of Sciences |
Zhang J.,Beijing NormalUniversity |
Zhang Y.,Beijing NormalUniversity |
And 4 more authors.
Proceedings - 2011 4th International Conference on Biomedical Engineering and Informatics, BMEI 2011 | Year: 2011
Mild cognitive impairment (MCI) is a transitional stage between normal aging and Alzheimer's disease (AD). Recent functional imaging studies have demonstrated regional deactivation magnitudes changes of default-mode network (DMN) in patients, accompanied by a defect of memory function. However, functional connectivity in the DMN during task performance was rarely investigated. METHODS : 26 amnestic MCI and 27 healthy controls underwent functional magnetic resonance imaging (fMRI) during an episodic memory task. Resting-state fMRI data were also collected. The changes in default-mode networks under both task-related and resting-state fMRI were obtained with a temporal correlation analysis. RESULTS: Significantly decreased functional connectivity was found mainly in anterior-posterior connectivity of DMN in aMCI groups. And a correlation existed between the anterior-posterior functional connectivity and MMSE scores. CONCLUSIONS: This study showed that disconnectivity of DMN could be used as an imaging biomarker for predicting the future cognitive decline of aMCI patients. © 2011 IEEE.
Wang T.,Beijing NormalUniversity |
Libaers D.,Beijing NormalUniversity |
Jiao H.,Beijing NormalUniversity
Journal of Product Innovation Management | Year: 2015
Many scholars have suggested that strategic flexibility is a critical firm capability to survive in today's competitive arena. The decision to take strategic actions to make the firm more strategically flexible typically originates in the top management team (TMT). As the principal decision-making unit of the firm, TMT members' information acquisition and processing capabilities and subsequent interpretation of environmental changes critically influence the decision to make the firm more strategically flexible to achieve a better fit with its market environment. Therefore, in order to understand how firms can adapt to environmental changes, scholars must study the sociopsychological processes of interaction among members of the TMT. This study examines the relationships between TMT's sociopsychological attributes (shared vision, social integration, and political ties) and strategic flexibility, which is decomposed into organizational flexibility and technological flexibility. The study further investigates how the level of competitive intensity can moderate the relationships. All the hypotheses are tested using structural equation models based on the survey data from 227 firms in China. The results show that organizational flexibility mediates the impact of TMT's social integration and political ties on technological flexibility. Surprisingly, a TMT's shared vision for the firm neither impedes nor facilitates the firm's effort in attaining the desired degree of organizational flexibility. However, TMT's shared vision does have a positive and direct impact on technological flexibility. Moreover, intense competition amplifies the positive impact of TMT social integration on the degree of organizational flexibility, but there is no significant moderating effect of competitive intensity on the relationship between a TMT's political ties and organizational flexibility. The results extend previous research by highlighting the importance of TMTs' sociopsychological attributes in driving technological flexibility, through the mediating impact of organizational flexibility. © 2014 Product Development & Management Association.