With the continuous development of e-business, e-business distribution center operating mode is gradually changing. Small batch and more frequency is the characteristics of the e-business. The new characteristics gives birth to new distribution center picking mode. This paper analyzes disadvantaged of the business mode of the current e-business distribution center, put forward a new type of e-b...

In this paper, we study a conjecture of J.Serrin and give a partial generalized result of the work of de Figueiredo and Felmer about Liouville type Theorem for non-negative solutions for an elliptic system. We use a new type of moving plane method introduced by Chen-Li-Ou. Our new ingredient is the use of Stein-Weiss inequality.

Urban production externalities (agglomeration effects) are external effects among producers in areas with a high density of economic activity. Such external effects are the main explanation for why productivity is usually highest in those areas of a country where economic activity is densest. There is some disagreement about the strength of urban production externalities. What is clear however ...

Coherent optical driving can effectively modify the properties of electronic valleys in transition metal dichalcogenides. Here, we observe a new type of optical Stark effect in monolayer WS2, one that is mediated by intervalley biexcitons under the blue-detuned driving with circularly polarized light. We find that such helical optical driving not only induces an exciton energy downshift at the ...

There seems to be a need for clarification on a number of issues that are seminal for the design community: for example, the constructs of invention, of creativity and of innovation (or innovative) appear to be used interchangeably. They are all a vital interest for design but they are different things. Furthermore there is a failure to distinguish between what design has a legitimate interest ...