Nuctech Company Limited

Tsinghua University

Peking University

Beijing Founder Electronics Co., Ltd.

Beijing Kingsoft Cloud Network Technology Co., Ltd.

Beijing Kingsoft Cloud Technology Co., Ltd.

Wang, Yongqiang

Yongqiang Wang

Qingjun Zhang

Ziran Zhao

Yuanjing Li

Zhiqiang Chen

Wenjian Zhang

Yanchun Wang

Yinong Liu

Yaohong Liu

Xiang Zou

Jianping Chang

Shuwei Li

Shuqing Zhao

Bozhen Zhao

Lifeng Sun

Kejun Kang

Jianping Gu

Xuewu Wang

Junli Li

Bicheng Liu

Guangming Xu

Junxiao Wang

Nan Bai

Zhi Zeng

Xingliang Zhai

Yi Liu

Yigang Yang

Huishao He

Jianping Cheng

Weibin Zhu

Shaoji Mao

Zhude Dai

Qinjian Zhang

Song Liang

Hejun Zhou

Shuqiang Dong

Nianming Jiang

Qingwen Miao

Xi Yi

Nan Yao

Yandong Nian

A URL refreshing method, apparatus and device in a CDN, and a CDN node, relating to the technical field of data processing, and the technical problem of poor URL refreshing efficiency in a CDN. The method includes: receiving a first refreshing request, the first refreshing request comprising at least one URL to be refreshed; comparing the at least one URL with a URL stored in a local database, the local database storing a URL corresponding to a locally stored source file; and executing a refreshing operation of the URL existing in the database.

URL refreshing method, apparatus and device in CDN, and CDN node

An aspirating smoke sensing device, method, and apparatus for fire detection are provided, and the device is provided with a charger (), a charge collector (), a controller (), an air intake structure (), and a negative pressure source for air path detection (). The air intake structure () is communicated with an input port of the charger (), an output port of the charger () is communicated with the charge collector (), an output port of the charge collector () is communicated with the negative pressure source for air path detection (), and the controller () is electrically connected to the charge collector ().

Aspirating smoke sensing device, method, and apparatus for fire detection

The present disclosure provides a dual-energy detection apparatus and method. The dual-energy detection apparatus includes an X-ray source configured to send a first X-ray beam to an object to be measured; a scintillation detector configured to work in an integration mode, and receive a second X-ray beam penetrating through the object to be measured to generate a first electrical signal; a Cherenkov detector configured to be located behind the scintillation detector, work in a counting mode, and receive a third X-ray beam penetrating through the scintillation detector to generate a second electrical signal; and a processor configured to output image, thickness and material information of the object to be measured according to the first electrical signal and the second electrical signal. The dual-energy detection method provided by the present disclosure may acquire an image of the object to be measured that is clearer and contains more information.

Dual-energy detection apparatus and method thereof

The present disclosure discloses an afterglow detection device and an afterglow detection method. The afterglow detection device comprises: an X-ray tube for emitting an X-ray beam; a first reading circuit for receiving a first detected signal from a to-be-detected detector to form and output a first measurement signal according to the first detected signal, the to-be-detected detector being connected to the first reading circuit and disposed on a beam-out side of the X-ray tube to receive radiation of the X-ray beam and outputting the first detected signal to the first reading circuit at the time of detection; a residual ray detector disposed on a beam-out side of the X-ray tube; a second reading circuit connected to the residual ray detector for receiving a second detected signal from the residual ray detector to form and output a second measurement signal according to the second detected signal.

Afterglow detection device and afterglow detection method

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

A large-area X-ray gas detector includes a housing having an inner cavity and a ray entrance communicated with the inner cavity, a thin entrance window and a signal collection module. The inner cavity is filled with a working gas which is a non-electronegativity gas sensitive to the X-ray. The entrance window is hermetically connected to the ray entrance such that the X-ray enters into the inner cavity. The signal collection module comprises an anode wire electrode layer and a cathode electrode layer arranged parallel with each other in the inner cavity, in which the anode wire electrode layer has an anode wire for accessing to a high voltage, and the cathode electrode layer is grounded. The anode wire electrode layer collects electrons generated by the working gas under an action of the X-ray.

Large-area X-ray gas detector

The present application relates to a dual energy detector and a radiation inspection system. The dual energy detector comprises: a detector module mount and a plurality of detector modules. The detector module includes a higher energy detector array and a lower energy detector array, which are juxtaposedly provided on said detector module mount to be independently irradiated. The present application may simplify the arrangement of the photodiodes and printed circuit boards to which the higher and lower energy detector arrays are connected, such that necessary thickness dimension of the detector module mount is reduced, thereby facilitating the installation and use of the dual energy detector of the present application. On the other hand, the radiation beam in the present application may be independently irradiated to the higher and lower energy detector arrays juxtaposed to each other, which reduces to certain extent the mutual restriction during selection of the higher and lower energy detector arrays.

Dual energy detector and radiation inspection system

The present invention provides a method for forming a sensitive film for neutron detection, wherein the sensitive film is formed by electrophoresis coating, the liquid used for electrophoresis coating includes neutron sensitive material, electrophoresis paint and deionized water, and the neutron sensitive material isB single substance,B compound or mixture containingB. The sensitive film for neutron detection has the high detection efficiency because of the high content ofB. The sensitive film for neutron detection has the uniform and stable film thickness, and excellent consistency. The production efficiency and the cost of the sensitive film are improved.

Sensitive film for neutron detection and method for forming the same

A method for processing a ceramic scintillator array, characterized in that, comprising the following steps: (a) forming, in a first direction, a predetermined number of straight first-direction through-cuts which are parallel to each other and spaced from each other on a scintillator substrate by using laser; (b) adequately filling the first-direction through-cuts with an adhesive and solidifying the adhesive; (c) forming, in a second direction. a predetermined number of second direction through-cuts which are parallel to each other at a predetermined interval on the scintillator substrate by using laser, wherein the second direction is perpendicular to the first direction; and (d) adequately filling the second direction through-cuts with the adhesive and solidifying the adhesive bond.

Method for processing ceramic scintillator array

The present disclosure is directed to a rapid process for the preparation of gadolinium oxysulfide having a general formula of GdOS, referred to as GOS, scintillation ceramics by using the combination of spark plasma primary sintering (SPS) and hot isostatic pressing secondary sintering.

[object Object]

The present disclosure is directed to a low cost sintering process for the preparation of gadolinium oxysulfide having a general formula of GdOS, referred to as GOS, scintillation ceramics, comprising uniaxial hot pressing primary sintering and hot isostatic pressing secondary sintering.

Process for the preparation of gadolinium oxysulfide scintillation ceramics

A boron-coated neutron detector, comprising a cathode tube with a plurality of passages formed therein along its longitudinal direction, the inner wall of each passage being coated with boron material; an electrode wire serving as an anode and arranged longitudinally in each of the passages, the electrode wire adapted to be applied with high voltage; and an insulating end plate to which each end of the cathode tube is fixed, the electrode wire being fixed to the cathode tube via the insulating end plate. Preferably, the cathode tube is formed by jointing a plurality of boron-coated substrates. The boron-coated neutron detector increases the detection efficiency of the neutron detector, which may reach or even exceed the detection efficiency of theHe neutron detector of the same size, and the cost thereof is much cheaper than theHe neutron detector.

Boron coated neutron detector and method for manufacturing the same

The present invention provides a cellular thermal neutron detector, comprising: a cellular structure comprised of one or more hollow regular hexagonal prism-shaped cellular units, wherein a neutron absorbing material is coated on an inner side of a pipe wall of each of the cellular units. Since the neutron-sensitive cellular structure is employed, the present invention can perform thermal neutron detection without using the scarce nuclide 3He, and effectively reduce the manufacture costs of the thermal neutron detector. Further, the present invention has characteristics such as a reduced or eliminated neutron detecting dead zone.

Cellular thermal neutron detector

The embodiments of the present invention provide a method and a system for interaction between a paper media and a reader. A 2D barcode scanning means () scans an image of a 2D barcode in the paper media; a 2D barcode identification means () identifies a data structure of the image of the 2D barcode and displays items to be fed back by the reader on a terminal; an identification feedback means () transmits the feedback from the reader to a feedback response means (); and the feedback response means (), after receiving the feedback from the reader, displays the feedback and responds to it by the paper media. According to the embodiments of the present invention, it is able to relieve an increasing impact of a new media such as Internet, mobile Internet and tablet PC on the paper media, and to inspire the reader to interact with the paper media, thereby to provide convenient and efficient interaction and communication between the paper media and the reader and to enhance intimacy therebetween.

Method and system for interaction between paper media and reader

Growing community of inventors

Beijing, China

Yongqiang Wang