Abstract: A solar cell having an electrical modulating stack layer is provided. The solar cell includes a first electrode, a second electrode, a photoelectric conversion layer, disposed between the first electrode and the second electrode. A first electrical modulating stack layer is disposed on the first electrode, wherein the first electrical modulating stack layer includes at least one positively charged layer and at least one negatively charged layer or the first electrical modulating layer includes a first surface modification layer.

Abstract: Disclosed are an information pushing method and a client. The method is applied in the client, and the client collects use habit information of a user. The method comprises: detecting whether an information pushing trigger condition is satisfied, and if yes, obtaining current battery power information and current time information of the client; generating first prompt information matched with a current state of the user according to the usage habit information, the current battery power information and the current time information; and pushing the first prompt information.

Abstract: A method for summarizing a document is provided. A concept is detected for each sentence in said document. Relevance measures between the sentences are computed according to the detected concepts. And then a concept-aware graph is constructed, wherein a node in said graph represents a sentence in the document and an edge between two nodes represents a relevance measure between these two sentences.