On the Accuracy of Group Credences

We often ask for the opinion of a group of individuals. How strongly does the scientific community believe that the rate at which sea levels are rising has increased over the last 200 years? How likely does the UK Treasury think it is that there will be a recession if the country leaves the European Union? What are these group credences that such questions request? And how do they relate to the individual credences assigned by the members of the particular group in question? According to the credal judgement aggregation principle, linear pooling, the credence function of a group should be a weighted average or linear pool of the credence functions of the individuals in the group. In this chapter, I give an argument for linear pooling based on considerations of accuracy. And I respond to two standard objections to the aggregation principle.

Analysis the Transformation and Upgrading Path of the Ports in Pearl River Delta

Through comprehensive analysis of all aspects of the environment of the Pearl River Delta ports, and the article carries out reasonable positions for ports. Using Grey Relational Theory calculated the related degree between ports and industry. Using the Industry aggregation principle which is based on the Location quotient researches the gathering and transferring trend of industry which is closely related to ports. Further this paper analysised the direction of the transformation and upgrading of the ports. And we can provide the transformation and upgrading path of ports in the Pearl River Delta.