Chinese Academy of Sciences

Beijing Qihoo Technology Company Limited

Sumei Wang

Jing Min Xu

Jun Luo

Junfeng Li

Wenwu Wang

Yan Cui

Tianchun Ye

Meiyin Yang

Yanhui Wang

Yanru Li

A multi-state memory and a method for manufacturing the same. A magnetoresistive tunnel junction is disposed on a spin-orbit coupling layer, and thermal annealing is performed after dopant ions are injected from a side of the magnetoresistive tunnel junction. The concentration of dopant ions in the magnetoresistive tunnel junction has a gradient variation along the direction that is perpendicular to the direction of the current and within the plane in which the spin-orbit coupling layer is located. Symmetry along the direction perpendicular to the direction of the current is broken. In a case a current flows into the spin-orbit coupling layer, resistance are outputted in multiple states in linearity with the current. The multi-state storage is achieved. It can meet a requirement on hardware of neural network synapses, and is applicable to calculation in a neural network.

Multi-state memory and method for manufacturing the same

The invention discloses a method and device for recognizing an IP address of a specified category, a defense method and system, wherein the method for recognizing an IP address of a specified category comprises the following steps: collecting behavior record data of several IP addresses (S); extracting preprocessing data from the collected behavior record data, the extracted preprocessing data comprising at least address information of an IP address and time information of a behavior (S); analyzing the extracted preprocessing data to obtain behavior-time distribution data of a user using the IP address (S); and recognizing an IP address of a specified category at least according to the behavior-time distribution data of a user using the IP address (S). By employing the invention, an IP address of a certain category can be located more accurately locate and the accuracy for recognizing an IP address is improved.

Method and device for recognizing an IP address of a specified category, a defense method and system

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Beijing, China

Sumei Wang