Abstract: An information sending method is provided. The method includes calculating a weight of an interaction setting between a first terminal device and a second terminal device, calculating a relational score based on the weight between the first terminal device and the second terminal device, the second terminal device being one or more second terminal devices, calculating a service index of the first terminal device based on the relational score, and sending information to the first terminal device based on the service index.

Abstract: A method and an apparatus for identifying a transaction risk are disclosed. The method includes obtaining risk identification information of a sub-network to which a node relating to a transaction to be identified belongs; and identifying a risk of the transaction to be identified based on the risk identification information of the sub-network to which the node relating to the transaction to be identified belongs, wherein the sub-network is a network acquired by partitioning a relationship network based on connectivity, the relationship network is a network built up with entities and activities relating to a plurality of transactions.

Abstract: Social network behavior data of two network subjects whose social relationship type is required to be determined is obtained. The network social behavior data of the two network subjects to be determined is discretized by a preset manner in such a way that each of the social behavior is discretized into N levels according to a quantity of each social network behavior. A merged probability of each social relationship type to which the two network subjects belong is calculated according to a conditional probability that each level of network social behavior corresponds to each social relationship type. A social relationship type having the largest merged probability is initially determined as a social relationship type of the two network subjects. The present techniques effectively utilized network social behavior data, implement determination of social relationship type, and improve user network experiences.

Abstract: Determining a transaction target identifier is disclosed, including: receiving an activation request from a client device, wherein the activation request includes one or more of the following: a requestor identifier, time information associated with the activation request, and location information associated with the activation request; determining a set of candidate transaction target identifiers based at least in part on the one or more of the following: the requestor identifier, the time information associated with the activation request, and the location information associated with the activation request; sending the set of candidate transaction target identifiers to the client device; receiving a selection associated with a transaction target identifier from the set of candidate transaction target identifiers from the client device; and processing the activation request based at least in part on the selected transaction target identifier.