Nuctech Company Limited

Tsinghua University

Beijing Xiaomi Mobile Software Co., Ltd.

Beijing University of Posts and Telecommunications

Other

Nuctech Jiangsu Company Limited

Nokia Solutions and Networks Oy

Junli Li

Yuanjing Li

Zhiqiang Chen

Yinong Liu

Jianmin Li

Kejun Kang

Yaohong Liu

Yanli Deng

Shangmin Sun

Chuanxiang Tang

Li Ni Zhang

Hua Peng

Ming Ruan

Wei Hong

Yajun Zhu

Qingjun Zhang

Wei Liu

Xuewu Wang

Qitian Miao

Ziran Zhao

Guang Yang

Haifeng Hu

Wanlong Wu

Jinyu Zhang

Wei Jia

Hui Zhang

Quanwei Song

Bicheng Liu

Jianping Cheng

Ming Hu

Jianping Gu

Yulan Li

Yongqiang Wang

Guangming Xu

Tao Wang

Ying Li

Song Li

Kun Zhao

Li Zhang

Yali Xie

Guoping Zhu

Zhi Zeng

Siyuan Liang

Huayi Zhang

Wenhuan Gao

Ming Huang

Shenjin Ming

Hao Yu

Zhizhong Liang

Weizhen Wang

Jianjun Su

Huaibi Chen

Chunguang Zong

Nan Jiang

Weifeng Yu

Bing Xin Wang

Dongyu Wang

Zhongrong Yang

Zongjun Shen

Jingyu Gu

Guangwei Ding

Qinghua Li

Liming Wang

Song Liang

Liwei Song

Tao Xue

Ming Zeng

Yanjun Han

Weiqiang Guan

Rongxuan Liu

Hao Ma

Hui Gong

Huaqiang Zhong

Yuxin Hu

Xiaoli Zhang

Fengjun Zhang

Xi Yi

Lingbo Qiao

Guibin Lin

Shuxiong Cao

Dong Yun

Ou Sun

Xingyu Pan

Ning Kang

Chaunxiang Tang

Yandong Zhou

Weibin Ling

Embodiments of the present application provide a detection method. The detection method includes: acquiring information of at least two first positions through which a particle passes before penetrating an object under detection, and information of at least two second positions through which the particle passes after penetrating the object under detection, wherein the object under detection is a metal product; reconstructing, based on the information of the at least two first positions, a first track before the particle penetrates the object under detection; reconstructing, based on the information of the at least two second positions, a second track after the particle penetrates the object under detection; processing the first track and the second track to obtain feature information of the object under detection; and determining, according to the feature information and preset feature information of an object of a target type, a detection result of the object under detection.

Detection method, apparatus and system

Provided is a device of detecting a ray dose adaptable for coupling with a terminal, including: a housing, a scintillator and a light shielding layer. The housing has an accommodating space and a window, the accommodating space is in communication with the window; the scintillator is configured to receive a ray and convert a received ray into a visible light, the scintillator is located in the accommodating space, the scintillator covers the window, an outer surface of the scintillator includes a first outer surface and a second outer surface, and the first outer surface is adapted to a camera of the terminal; and the light shielding layer is configured to shield a visible light in an external environment from illuminating on the scintillator, the light shielding layer is arranged on the second outer surface of the scintillator.

Device of detecting ray dose adaptable for coupling with terminal and method of detecting ray dose

A frame transmission method, includes: sending, by a first communication end to a second communication end, a first RTS on an unlicensed channel, wherein the first RTS carries a licensed frequency band source indication; receiving, according to the licensed frequency band source indication, an assist-clear to send (A-CTS) that is sent by the second communication end in a retreat state on the licensed channel; and sending, according to the A-CTS, a first clear-request to send (C-RTS) on the unlicensed channel, wherein the first C-RTS is configured for instructing a third communication end to exit the retreat state entered based on the first RTS.

Frame transmission method and apparatus, communication end, and storage medium

A method for transmitting transmission block configuration parameter is provided. The method includes: sending first downlink control information (DCI) for scheduling a multi-transmission time interval transmission block, where the first DCI includes a preset indicator indicating that a configuration parameter that determines a transmission block size (TBS) of a retransmission TB scheduled by means of the first DCI is from the first DCI or second DCI, and the second DCI is DCI for scheduling a new transmission TB corresponding to the retransmission TB.

Transmission block configuration parameter transmission method and apparatus, and communication device and storage medium

Disclosed is a hybrid automatic repeat request (HARQ) feedback enhancement method. The method comprises: sending downlink control information comprising first indication information to a terminal, the first indication information being used for indicating the number of downlink transport blocks received by the terminal on a sub-frame after the current sub-frame and a sub-carrier after the current sub-carrier within the current HARO feedback window.

HARQ feedback enhancement method and apparatus, communication device and storage medium

A data transmission method includes: sending, by a network device, a fixed-length downlink control information (DCI), wherein the fixed-length DCI comprises a detection parameter corresponding to a variable-length DCI.

Downlink control information transmission method and device, and storage medium

A random access method and a device thereof are provided. The method includes that a base station receives a random access preamble and sends a Random Access Response (RAR) according to the random access preamble, where the RAR indicates at least two time-frequency units, and the at least two time-frequency units are time-frequency units having different time domains on an unlicensed channel. Further, the base station receives a first random access message 3 (MSG3) sent on a first time-frequency unit by a first terminal and sends a first random access message 4 (MSG4) to the first terminal, where the first time-frequency unit is any one of the at least two time-frequency units, where the first MSG3 includes a terminal identifier of the first terminal, where the first MSG4 carries a terminal identifier of the first terminal and a first Cell-Radio Network Temporary Identifier allocated to the first terminal.

Random access method and apparatus, and storage medium

The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.

Substance identification device and method for extracting statistical feature based on cluster analysis

There are disclosed a collimator, a radiation emitting assembly and an inspection apparatus. The collimator is configured to collimate radiation from a radiation emitter. One of the collimator and the radiation emitter is provided with a protrusion portion and the other is provided with a recess portion such that the protrusion portion is capable of being placed within the recess portion and the radiation emitter and the collimator are allowed to be arranged close to and connected with each other, and that the radiation passes through passages in the protrusion portion and the recess portion from the radiation emitter to the collimator.

Collimator, radiation emitting assembly and inspection apparatus

The present disclosure relates to a method, a device and a system for inspecting a moving object based on cosmic rays, pertaining to the field of radiation imaging and safety inspection techniques. The method includes: detecting whether a speed of the inspected moving object is within a preset range; recording a motion trajectory of the moving object with a monitoring device; acquiring information about charged particles in the cosmic rays with a position sensitive detector, the information about charged particles including track information of the charged particles; determining the moving object by matching positions of the motion trajectory and the track information; reconstructing the track of the charged particles according to the information about the charged particles; and recognizing the material inside the moving object based on the track reconstruction.

Method, device and system for inspecting moving object based on cosmic rays

The present application relates to a method, apparatus and system for inspecting an object based on a cosmic ray, pertaining to the technical field of radiometric imaging and safety inspection. The method includes: recording a movement trajectory of an inspected object by using a monitoring device; acquiring information of charged particles in the cosmic ray by using a position-sensitive detector, the information of charged particles comprising trajectory information of the charged particles; performing position coincidence for the movement trajectory and the trajectory information to determine the object; performing trajectory remodeling for the charged particles according to the information of charged particles; and identifying a material inside the moving object according to the trajectory remodeling. According to the present disclosure, pedestrians who are walking and moving are inspected by using the cosmic ray, and nuclear materials, drugs and explosive materials and the like carried by human bodies may be detected.

Method, apparatus and system for inspecting object based on cosmic ray

The present invention provides a ray beam guiding device for guiding a ray beam in a ray inspection apparatus. The ray beam guiding device is provided in a housing of the ray inspection apparatus, and two ends of the ray beam guiding device are connected to a front collimator and a rear collimator, respectively. The ray beam guiding device comprises a plurality of guiding walls and a guiding cavity surrounded by the guiding walls. The guiding wall is formed of a first material which is capable of absorbing rays or the first material is coated on an inside of the guiding wall, and the guiding cavity has a central axis extending in a direction from the rear collimator to the front collimator, and the ray beam guiding device further comprises at least one fin plate provided in the guiding cavity of the ray beam guiding device. The at least one fin plate is configured for blocking and/or absorbing scattered rays.

Ray beam guiding device and ray inspection apparatus having the same

The disclosure provides a method for measuring X-ray energy of an accelerator in an inspection system. the method comprises: building a database comprising correspondence between half-value layer (HVL) and energy under a predetermined condition; measuring HVL for X-rays of the accelerator in the inspection system on line under the same predetermined condition; and comparing the measured HVL with the HVLs in the database comprising correspondence between HVL and energy to determine the X-ray energy of the accelerator. The method is applicable to a large-scale container/vehicle inspection system for measurement of X-ray energy/HVL of the accelerator so as to acquire source state of the inspection system in real time.

Method for measuring X-ray energy of an accelerator in an inspection system

The present disclosure discloses an alignment system and an alignment method for a container or vehicle inspection system, and an inspection system. The inspection system comprises comprising an ray source, a collimator, a detector arm and a detector module mounted on a detector arm, the ray source, the collimator and the detector module are arranged to form an inspection passage, a ray beam emitted from the ray source passes through collimator and irradiates onto an inspected object, and an attenuated ray beam is collected by the detector module so as to complete inspection. The alignment system comprises a measuring module arranged to receive the ray beam emitted from the collimator and to measure the ray beam so as to determine positions and orientations of the ray source and the collimator. With the alignment method, alignment between a center point of the ray source, a central line of a detector tip and a central line of the collimator may be more accurately measured.

Alignment system and method for container or vehicle inspection system

A vehicle mounted mobile container or vehicle inspection system, including: a radiation source, a movable vehicle for carrying the inspection system, and a detector arm rack which has a horizontal arm and a vertical arm, a first end of the horizontal arm is connected to the vehicle and a second end thereof is connected to an end of the vertical arm. The horizontal arm and the vertical arm are connected by a pivotal connecting device such that the vertical arm may pivot in a vertical plane, and the horizontal arm and the vertical arm may be retracted in a same horizontal plane. The novel arm rack construction may reduce the space occupied by it on top of the scanning vehicle after the arm rack is stowed so as to reduce the eight of the scanning vehicle under running condition.

Vehicle mounted mobile container or vehicle inspection system

Growing community of inventors

Beijing, China

Junli Li