Tsinghua University

Beijing Xiaomi Mobile Software Co., Ltd.

Beijing Tiexue Tech. Co., Ltd.

Wang, Liping

Liping Wang

Ying Gao

Jun Wu

Binbin Zhang

Hua Zhang

Cong Peng

Xin Liu

Guang Yu

Cheng Jiang

Xi Luo

Yaqi Liu

Xiaoqiang Tang

Lin Qu

Tianrui Xu

Hengchun Cui

Zhufeng Shao

Dianjun Wang

Rui Yao

A random access method for a terminal includes: receiving a system message broadcasted by a target base station and initiating random access to the target base station; in response to a failure of the random access, determining a first operator to which the target base station belongs based on a first PLMN identity in the plurality of PLMN identities; and in response to a second operator, to which the terminal belongs, being different from the first operator, stopping a random access retry to the target base station and initiating random access to other base station except the target base station. The system message includes a plurality of public land mobile network (PLMN) identities with an order relationship.

Random access method and apparatus, and method and apparatus for sending PLMN identity

A method for detecting the state of the proximity sensor, applied to a terminal including the proximity sensor and an antenna, includes: sending a predetermined instruction to the proximity sensor; determining whether the proximity sensor is abnormal based on a feedback result of the proximity sensor to the predetermined instruction; and maintaining the antenna transmitting power at a low power if the proximity sensor is abnormal. Through the feedback of the proximity sensor to the request to obtain the capacitance value, it is determined whether the proximity sensor can work normally, and in a case that the proximity sensor cannot work normally, the antenna transmitting power is reduced to avoid the continuous high antenna transmitting power due to the inability of the proximity sensor to work normally, which reduces the radiation to the human body.

Method and apparatus for detecting state of proximity sensor, terminal and non-transitory computer-readable storage medium

The presently disclosed technology includes a friction stir welding apparatus comprising a frame, a moving platform and a parallel mechanism composed of three branch mechanisms, wherein a first branch mechanism comprises a first sliding pair, a first revolute pair, a telescopic rod and a first spherical pair connected in sequence. A second branch mechanism and a third branch mechanism both comprise a third sliding pair, a second revolute pair, a third linkage and a second spherical pair connected in sequence. The friction stir welding apparatus has high stiffness, low inertia, high dynamic performance and high accuracy, which can achieve precision welding with high requirements on processing quality and accuracy for jointing annular seams of large-scale rocket fuel storage tank barrels in the aviation field, for example. The presently disclosed technology also includes a corresponding friction stir welding system.

Friction stir welding apparatus and friction stir welding system comprising the same

A dual axis solar tracker is provided. The dual axis solar tracker includes a moving platform, a fixed platform, a serial chain, a parallel chain and a driving device. The moving platform is supported by the serial chain and driven by the parallel chain, forming a parallel tracking mechanism. The driving device is configured to drive the parallel chain to motion so as to drive the moving platform to rotate around vertical and horizontal axes. The dual axis solar tracker of the present disclosure has a larger workspace, a better tracking performance and advantages of high rigidity, low energy consumption, small driving torque and low inertia, etc.

Dual axis solar tracker

Multi-pockets pants

A spindle head structure rotatable in A/B axes is provided, comprising: a spindle support, an intermediate support, a base support, an upper telescopic strut and a lower telescopic strut. The spindle support may be adapted to be fixed with a spindle. The intermediate support may be connected with the spindle support via two coaxial upper revolute pairs. The base support may be connected with the intermediate support via two coaxial lower revolute pairs. The upper telescopic strut may be connected between the spindle support and the intermediate support. And the lower telescopic strut may be connected between the intermediate support and the base support.

Spindle head structure rotatable in A/B axes

Growing community of inventors

Beijing, China

Liping Wang