Crrc Qingdao Sifang Co., Ltd.

Hisense Laser Display Co., Ltd.

China University of Petroleum

Qingdao Kingagroot Chemical Compound Co., Ltd.

Research Institute of Exploration and Development, Shengli Oilfield Branch, Sinopec

Bo Chen

Fei Zhao

Lijun Ma

Huiqing Zhang

Qing Tian

Qingjun Han

Yongda Huang

Xin Jiang

Lei Wang

Lei Lian

Jianying Liang

Donghua Wu

Zhen Wang

Jinghai Jiao

Guangzhong Lv

Xiaojie Yu

Fangdong Hou

Chao Song

Guizhi Liu

Junjie Zhang

Zhenguo Li

Guangdi Yuan

Dehui Ding

Huarong Li

Sudong Mo

Xiaoduo Cui

Gang Cao

Yongpeng Ren

Chuanzhi Cui

Zhongwei Wu

Tongyu Yao

Chuanbao Zhang

The present invention relates to a mutant p-hydroxyphenylpyruvate dioxygenase (HPPD) protein or a bioactive fragment thereof and an isolated polynucleotide comprising a nucleic acid sequence encoding the protein or fragment thereof, wherein the mutant p-hydroxyphenylpyruvate dioxygenase (HPPD) protein or a bioactive fragment thereof retains or enhances the property of catalyzing the conversion of p-hydroxyphenylpyruvate (HPP) to homogentisate and is significantly less sensitive to HPPD-inhibiting herbicides than a wild-type HPPD. The present invention also relates to a nucleic acid construct, an expression vector and a host cell comprising the polynucleotide, as well as to a method for producing a plant that has the property of catalyzing the conversion of p-hydroxyphenylpyruvate (HPP) to homogentisate and significantly reduced sensitivity to HPPD-inhibiting herbicides.

Mutant p-hydroxyphenylpyruvate dioxygenase, and coding nucleic acid and use thereof

The invention discloses a method for determining vertical well stratified fracturing crack length based on interlayer equilibrium development. According to the method, interlayer equilibrium development can be achieved by determining the crack length of fracturing of each layer in the condition that an oil well meets the productivity requirements. The method comprises the following steps: 1) a threshold pressure gradient of each layer is determined; 2) a relationship chart of the crack half-length xand the equivalent well diameter ris established; 3) daily oil production rate per unit thickness Qmeeting the production requirements is calculated; 4) the equivalent well diameter rof each layer is calculated according to the daily oil production rate Q; and 5) the crack half-length xof fracturing of each layer is calculated according to the equivalent well diameter rof each layer.

Method for determining vertical well stratified fracturing crack lengths based on interlayer equilibrium displacement

Provided are a screen frame and a laser projection display device. The screen frame includes a plurality of side frames that are connected end to end, where each two adjacent side frames of the plurality of side frames are connected by at least two connectors, and the at least two connectors are connected to the each two adjacent side frames by fasteners; the at least two connectors include a first connector and a second connector, and an inserting direction of a fastener on the first connector is perpendicular to a plane where the screen frame is located, and an inserting direction of a fastener on the second connector is parallel to the plane where the screen frame is located. The present disclosure can realize accurate alignment and joining relatively easily.

Screen frame and laser projection display device

A method, system and device for controlling a door of a railway vehicle are provided. The method comprises: a door control instruction sent by a transponder is received when a railway vehicle draws into the station, wherein the door control instruction is used for determining a door of the railway vehicle at a platform side; and the railway vehicle is controlled to open the door of the railway vehicle at the platform side according to the door control instruction, thereby solving the technical problem that the door of a railway vehicle at the non-platform side may be opened by mistake by a driver due to human factors because the door of the railway vehicle at the platform side is manually opened when the railway vehicle stops.

Method, system and device for controlling door of railway vehicle

Provided are a screen frame and a laser projection display device. The screen frame includes a plurality of side frames that are connected end to end, where a joint of each two of the plurality of side frames is provided with at least two connectors and receiving grooves corresponding to the at least two connectors in a one to one manner, and the at least two connectors have inserting portions extendable into the receiving grooves, at least one inserting portion of the inserting portions is provided with a telescopic engaging member, and a side wall of a receiving groove which is corresponding to an inserting portion having the engaging member is provided with a receiving hole corresponding to the engaging member; the engaging member is configured to extend into the receiving hole for positioning; and the inserting portions are connected to side walls of the receiving grooves by fasteners.

Disclosed is an alarming and unlocking device. The alarming and unlocking device is installed in a passenger carriage and includes a control switch (), a communication device, and a locking device, wherein the control switch () is provided with an alarming position () and an unlocking position (); the control switch () is in signal connection with the communication device; when the control switch () is located at the alarming position (), the communication device is started to receive and send a voice signal; the locking device is installed on a door so as to control the door to lock or unlock; the control switch () is in signal connection with the locking device; and when the control switch () is located at the unlocking position (), the locking device performs an unlocking operation. According to the alarming and unlocking device, the problem that a structure for an alarming and unlocking device on a vehicle is relatively complex in the conventional art is solved.

Alarming and unlocking device

Growing community of inventors

Qingdao, China

Bo Chen