Beijing Dajia Internet Information Technology Co., Ltd.

Chinese Academy of Medical Sciences

Beijing Sifang Automation Co., Ltd.

An Liu

Yan Li

Jun Zhang

Tao N Zhang

Jie Yang

Yanjun Ma

Yong Yuan

Gang Xu

Chang Chen

Dong Ding

Qiurong Chen

Cong Guo

Wenhao Shi

Cunyi Zhang

Jintang Cheng

Bingqing Ke

A method for verifying an image can include: acquiring a first feature point set of a source image and a second feature point set of a target image; determining a target local feature point pair based on the first feature point set and the second feature point set; determining a mapped point of the first feature point on the target image; determining a distance between a second feature point and the mapped point; acquiring a quantity of reference local feature point pairs; and determining that the target image is an image acquired by copying the source image based on the quantity being greater than a target quantity.

Method and device for verifying image and video

The present invention relates to an indoleacetic acid derivative and a preparation method and pharmaceutical use thereof. In particular, the present invention relates to a compound shown in general formula (I), a preparation method thereof, a pharmaceutical composition comprising the same, and a use thereof as a cough suppressant in treating a disease such as a cough. The definition of each substituent in the general formula (I) is the same as the definition in the specification. 

Indoleacetic acid derivative and preparation method and pharmaceutical use thereof

An anti-interference switch signal transmission circuit, in which a changeover switch is used at a signal terminal, is disclosed. A normally closed contact is connected to DC&#x2212;, a normally open contact is connected to DC+, and a common contact is connected to a switch signal acquisition circuit. When no signal exists, DC&#x2212; is provided to a positive input terminal of the switch signal acquisition circuit via the normally closed contact. Since a negative input terminal of the switch signal acquisition circuit is also connected to DC&#x2212;, even if interference is caused, no false signal is generated. When a signal exists, the position of the changeover switch changes and DC+ is connected to DC&#x2212; via the closed normally open contact through the switch signal acquisition circuit thus a loop is formed, so that the signal can be detected.

Anti-interference switch signal transmission circuit

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Beijing, China

An Liu