Huawei Technologies Co., Limited

Other

Xi'an University of Technology

Xi'an Morda Core Electronics Technology Co., Ltd

Xi'an Taijin New Energy & Materials Sci-tech Co., Ltd.

Xi'an Heavy Equipment & Technology Co., Ltd.

Bo Yang

Yunbo Li

Bo Li

Le Zhang

Dong Miao

Xiuling He

Chu Shen

Qing Feng

Hua Wu

Tianyu Wu

Xin Wang

Jian Li

Jun Yang

Shu Lin Liu

Siqi Wang

Feng Ding

Xiaohui Zhao

Zuohua Chai

Dahao Wang

Yali Wu

Jianfeng Chen

Yaohui Li

An optimization method for bending rebound quantity of aluminum roll forming includes the following steps: S, analyzing the process of aluminum roll forming, and determining decision variables of aluminum rebound quantity and thickness reduction; S, constructing the optimization model of the bending rebound quantity of aluminum roll forming based on the multi-objective optimization algorithm and clarifying constraints in the process of aluminum roll forming; S, based on characteristics of the model in S, proposing the corresponding algorithm to optimize the aluminum rebound quantity and thickness reduction; S, updating the decision variables that affect the aluminum rebound quantity and thickness reduction; S, judging the iteration stop condition, and outputting the scheme that improves the bending rebound quantity of roll forming aluminum. The optimization method solves the problem of large bending rebound quantity in roll forming technology, improves the accuracy of roll forming process and production efficiency, and enhances production flexibility.

Optimization method for bending rebound quantity of aluminum roll forming

A large-width cathode roller for producing high-strength ultra-thin copper foil includes titanium side plates and a titanium cylinder sealed by the titanium side plates, and a cathode roller core penetrated through the titanium side plates. Steel-copper explosive clad cylinders and a steel support plate are disposed in/on the side plate, inner ring surfaces of the side plates and the copper plates are connected to a copper sleeve around the cathode roller core, outer ring surfaces of the copper plates and the steel support plates are connected to a copper cylinder, inner ring surfaces of the steel support plates are connected to the cathode roller core; and multiple electrically conductive support rings on the copper cylinder are connected to the copper plates on two sides through the electrically conductive copper bars to form a conducting loop to improve the distribution uniformity of the current on the surface of the cathode roller.

Large-width cathode roller for producing high-strength ultra-thin copper foil

A hot-spinning formation method for large-diameter titanium alloy cylindrical parts. A workblank is placed in a resistance furnace to heated to 600-650&#xb0; C., is maintained at this temperature for 0.5-1 h and is then taken out of the resistance furnace; after the workblank is heated, the inner diameter of the workblank becomes larger; the heated workblank is installed on a mandrel, and spinning is started when a maximum clearance between the workblank and the mandrel is less than 0.5 mm; the mandrel and the spinning rollers do not need to be preheated, and a multi-pass spinning process is adopted, such that the workblank can deform more uniformly. A vertical spinning lathe is used for spinning, the mandrel is easy to change, and the workblank is easy to assemble and disassemble.

Hot-spinning formation method for large-diameter titanium alloy cylindrical parts

The present disclosure provides a forward converter with secondary LCD connected in parallel to realize forward and backward energy transmission, comprising a forward converter main circuit and an energy transfer and transmission circuit. The forward converter main circuit includes a high-frequency transformer T, a switching tube S, a diode D, a diode D, an inductance L, and a capacitor C. The energy transfer and transmission circuit includes a diode D, a capacitor Cand an inductance L

Forward converter with secondary LCD connected in parallel to realize forward and backward energy transmission

A communications device includes: a processor, configured to determine a quantity of first idle channels; and a transmitter, configured to send data to a receiving end on each of the first idle channels; wherein the processor is further configured to: determine whether the data is to be resent; and if the data is to be resent, cause the transmitter to resend the data; and continue to determine whether the data is to be resent and, if the data is to be resent, re-determine the quantity of first idle channels and cause the transmitter to resend the data.

Data transmission method and communications device

A multivariate signature method for resisting key recovery attack, which establishes a new signature verification condition by adding additional value of signature. The verification condition implies verification of internal information x and y, thereby effectively resisting key recovery attack generated by the existence of equivalence key. Specifically, the method includes the three stages of data preprocessing, signature generation and signature verification. The invention is a signature authentication method based on polynomial equations of a plurality of variables in a finite field, which can effectively resist the key recovery attack, provide the basic technical support for the information security and the establishment of the trust system in the quantum computer era, and provide a secure digital signature option in the quantum era. The present invention is especially suitable for use under application condition which has limited storage and processing time, such as smart cards, wireless sensor networks and dynamic RFID tags.

Multivariate signature method for resisting key recovery attack

Embodiments of the present invention provide a method and an apparatus for establishing a transmission mode, which relates to the field of network technologies, ensure backward compatibilities of an existing WLAN system and a next generation WLAN system, realize introduction of a new technology in the next generation WLAN protocol during data transmission, and improve network performance. The method includes: transmitting, by an access point AP, a first Clear To Send frame to a first station STA, to enable the first STA to set duration of a network allocation vector NAV of the first STA and remain in a silent state when the AP communicates with a second STA; transmitting the first Clear To Send frame to the second STA, to enable the second STA to process a Green Phase operation; and communicating with the second STA in a Green Phase period. The present invention is applied in data transmission.

Method and apparatus for establishing transmission mode

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Xi'an, China

Bo Yang