To study characteristics and market structure of data service and the role ofoperator, this paper makes a commercial model by applying the theory of intermediaries andneoclassic economics. Data service has different e...To study characteristics and market structure of data service and the role ofoperator, this paper makes a commercial model by applying the theory of intermediaries andneoclassic economics. Data service has different economic characteristics from voice service.Firstly, production mode of data service is roundabout production, secondly, driving power of dataservice is economies of specialization, and finally, management method of data service is impersonalmanagement. In data service market, information asymmetry and barrier to entry determinetransaction efficiency and the specialization level of service providers indirectly. Therefore,operator should intervene in the market by offering trade service in order to promote development ofservice providers. Because of different quality of service providers, market structure of dataservice must be the state that trade platform built by operator and intermediary platform built byoperator coexists.展开更多
Recent studies have made substantial progress in understanding the interactions between cognitive functions, from language to cognitive control, attention, and memory. However, dissociating these functions has been ha...Recent studies have made substantial progress in understanding the interactions between cognitive functions, from language to cognitive control, attention, and memory. However, dissociating these functions has been hampered by the close proximity of regions involved, as in the case in the prefrontal and parietal cortex. In this article, we review a series of studies that investigated the relationship between language and other cognitive functions in an alternative way - by examining their functional （co-）lateralization. We argue that research on the hemispheric lateralization of language and its link with handedness can offer an appropriate starting- point to shed light on the relationships between different functions. Besides functional interactions, anatomical asymmetries in non-human primates and those underlying language in humans can provide unique information about cortical organization. Finally, some open questions and criteria are raised for an ideal theoretical model of the cortex based on hemispheric specialization.展开更多
基金This work is supported by National Science Foundation of China (No.70472073).
文摘To study characteristics and market structure of data service and the role ofoperator, this paper makes a commercial model by applying the theory of intermediaries andneoclassic economics. Data service has different economic characteristics from voice service.Firstly, production mode of data service is roundabout production, secondly, driving power of dataservice is economies of specialization, and finally, management method of data service is impersonalmanagement. In data service market, information asymmetry and barrier to entry determinetransaction efficiency and the specialization level of service providers indirectly. Therefore,operator should intervene in the market by offering trade service in order to promote development ofservice providers. Because of different quality of service providers, market structure of dataservice must be the state that trade platform built by operator and intermediary platform built byoperator coexists.
文摘Recent studies have made substantial progress in understanding the interactions between cognitive functions, from language to cognitive control, attention, and memory. However, dissociating these functions has been hampered by the close proximity of regions involved, as in the case in the prefrontal and parietal cortex. In this article, we review a series of studies that investigated the relationship between language and other cognitive functions in an alternative way - by examining their functional （co-）lateralization. We argue that research on the hemispheric lateralization of language and its link with handedness can offer an appropriate starting- point to shed light on the relationships between different functions. Besides functional interactions, anatomical asymmetries in non-human primates and those underlying language in humans can provide unique information about cortical organization. Finally, some open questions and criteria are raised for an ideal theoretical model of the cortex based on hemispheric specialization.
