Shandong University

The Chinese University of Hong Kong

Asm Assembly Automation Limited

Beijing University of Chemical Tehcnology

Qingdao Goertek Technology Co., Ltd.

China University of Petroleum

Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd. (Cn)

Yang Yang

Shucai Li

Huaifeng Sun

Wei Liu

Yunxia Liu

Nuoya Zhang

Jishan He

Diquan Li

Jingbo Weng

Bo Zhang

Hui Liu

Baojiang Sun

Zhiyuan Wang

Jintang Wang

Xiaohui Sun

Jianbo Zhang

Yang Liu

Qiang Liu

Bangtang Yin

Kun Wang

Xuerui Wang

Rui Liu

Hui Yuan

Bo Yang

Shun Jia

Yawei Zhang

Wenlai Zhang

Heng Zhang

Keung Chau

Peng Xu

Luzhou Liu

Hongji Xu

Jing Yang

Jie Zhong

Shang Wang

Chenguan Li

Xiaoao Liu

Pengfei Duan

Man Guo

Xianding Yang

Yujun Li

Junjie Wang

Ziqiang Zheng

Na Zhang

Xiaoming Jie

Hong Chen

Xiangpeng Min

Tianyou Hou

Le Ma

Shengshuai Su

Guohong Zhang

Jingyan Zhang

Shangbin Liu

Ping Guo

Wenhan Li

Shidi Fan

Tong Wang

Xiaojie Sun

Juan Li

Yuzhen Zhu

Choo Han Loh

Yandong Zhang

Lingling Pan

Min Chen

Xiaohui Ren

Wei Min Zhong

Baozhen Du

Disclosed are a device and method for rapidly regulating downhole pressure after a kick in deepwater shallow open-circuit drilling. The device includes a real-time monitoring device and a real-time regulation device. Aiming at deepwater shallow open-circuit drilling characteristics, the present disclosure proposes that a drilling fluid return condition at a seabed is monitored through a subsea remote operated vehicle (ROV); based on this data, whether gas influx occurs in a downhole or not and changes of the gas influx rate and the formation pressure after the gas influx are analyzed in real time, and then real-time guidance is provided for the design of key parameters such as well killing fluid displacement and density, and the well killing fluid displacement and density are regulated in real time, to achieve rapid regulation of the downhole pressure after gas influx of deepwater shallow open-circuit drilling.

Device and method for rapidly regulating downhole pressure after kick in deepwater shallow open-circuit drilling

Disclosed is an unmanned food delivery device in a cabin. The device comprises a first conveying mechanism, a second conveying mechanism and a loading and unloading mechanism. The first conveying mechanism comprises a universal conveyor belt, and the universal conveyor belt is driven by universal wheels to convey lunch boxes, and the universal conveyor belt is used for conveying lunch boxes in a kitchen area and a passenger area in a reciprocating manner; multiple second conveying mechanisms are respectively arranged on a luggage rack bottom plate in the passenger area, the luggage rack bottom plate is provided with multiple feeding openings respectively corresponding to seats at intervals, each second conveying mechanism is respectively positioned at the feeding openings, the second conveying mechanisms are connected with the first conveying mechanism and used for conveying lunch boxes by the first conveying mechanism to the seats.

Unmanned food delivery device in cabin and application method thereof

A method and system for generating a logarithmic non-uniform pseudo-random electromagnetic exploration signal including: constructing two or more basic unit signals, according to an exploration requirement, that are stairstep signals obtained by superposing in-phase periodic square wave signals, a frequency ratio between adjacent periodic square wave signals is 2, and the two or more basic unit signals meet the following requirement: if a lowest dominant frequency in a first basic unit signal is a fundamental frequency, lowest frequencies of the remaining basic unit signal are l×2times the fundamental frequency, where l is an odd number except 1, and m is a natural number; and superposing the two or more basic unit signals to obtain a logarithmic non-uniform 2sequence pseudo-random signal. A logarithmic non-uniform 2sequence stairstep signal is constructed within a limited frequency interval, and requirements of prospectors for a higher frequency density within a specific frequency interval are met.

Method and system for generating logarithmic non-uniform pseudo-random electromagnetic exploration signal

A method and system for exploring hidden karst pipelines, mainly comprising: determining an upstream and a downstream of an underground karst pipeline; laying a grounding electrode at the upstream and the downstream respectively; establishing an electromagnetic emission system through underground karst water channels in the underground karst pipeline in a survey area, a transmitter and a generator; arranging a receiving system through an air mobile equipment towing a receiver as a receiving end; turning on the electromagnetic emission system; a generator supplying power to emission circuit; controlling the air mobile equipment to move along routes to collect signal continuously above the survey area, to complete an area-based measurement, and obtain observed data in the whole survey area; processing the observed data; delineating a concrete distribution of the underground karst water channels from the to the, such as a net-shaped path diagram or a tree-shaped path diagram.

Method and system for exploring hidden karst pipelines

A novel tracing apparatus includes an electromagnetic transmitting system, a multi-frequency transmitting antenna, electrodes, and a receiver. The electromagnetic transmitting system is at an upstream point and includes a generator and a transmitter having a capacitor; the transmitting antenna penetrates into a detected aquifer through karst collapse or a drill hole; the electrodes and the receiver are at a downstream point, and include two pairs of electrodes orthogonally distributed and located in a cofferdam formed by downstream water; and the receivers collect electric signals in the electrodes. The apparatus is based on good electrical conductivity of water, and can use electromagnetic signals as a tracer for rapid observation. Compared with traditional tracers, electromagnetic signals propagate fast in water, are stable in property, and free of pollution. This apparatus can be applied to groundwater tracing detection, and problems with the traditional tracers having poor timeliness and being environmentally unfriendly are resolved.

Tracing method and apparatus based on electromagnetic field

A system and method for controlled-source electromagnetic exploration is based on staggered frequency excitation of crossed sources. Different high-order pseudo-random signals are transmitted using two sources, respectively, each set of high-order pseudo-random signals may contain sufficient frequencies within a same complete frequency range, exploration frequencies of the two sets of signals are completely staggered, simultaneous transmission by the two field sources is implemented, and different polarization modes do not affect each other and are separated from each other. Moreover, different measuring line directions at a receiving terminal can be observed simultaneously, and each measuring point has two polarization directions, thus greatly improving the exploration efficiency and the data volume.

System and method for controlled-source electromagnetic exploration based on staggered frequency excitation of crossed sources

The invention relates to a QoX adaptive management-based context information uncertainty elimination system and a working method thereof. The system includes a sensor module, a context information acquisition and modeling module, a context threshold information preset module, an original context information detection module, an adaptive management module, an uncertainty elimination module, a context information correlation analysis module, an original context information flow reconstruction module, a composite context information flow module, a fusion and reasoning module, a context application layer adjustment module and a knowledge base.

Context information uncertainty elimination system and working method based on QoX adaptive management

A method and system for generating a high-order pseudo-random electromagnetic exploration signal. The method includes: constructing two or more basic unit signals according to an exploration requirement, wherein the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, and a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2; and superposing the two or more basic unit signals to obtain superposed stairstep signals, and correcting amplitudes to be consistent with amplitudes of the periodic square wave signals, to obtain high-order 2sequence pseudo-random signals. The 2sequence stairstep signals of different orders can be constructed within a limited frequency interval.

Method and system for generating high-order pseudo-random electromagnetic exploration signal

A data enhancement expansion method, recognition method and system for deep learning, the data enhancement expansion method includes the following steps: collecting original video data of a target to be recognized, and extracting original images of several recognized targets from the original video data; extracting seed images of RoI outlines of the recognized targets from the original images; performing an image enhancement operation on the seed images of the RoI outlines of the recognized targets, and randomly extracting the seed images subjected the image enhancement operation for image aliasing enhancement to obtain several composite images; and generating a data set based on the original images of the several recognized targets and the several composite images. Original data materials are easy to obtain with extremely low cost and high authenticity, and can be really put to a deep learning network to achieve good recognition results.

Automatic data enhancement expansion method, recognition method and system for deep learning

A scene change method and system combining instance segmentation and cycle generative adversarial networks are provided. The method includes: processing a video of a target scene and then inputting the video into an instance segmentation network to obtain segmented scene components, that is, obtain mask cut images of the target scene; and processing targets in the mask cut images of the target scene by using cycle generative adversarial networks according to the requirements of temporal attributes to generate data in a style-migrated state, and generating style-migrated targets with unfixed spatial attributes into a style-migrated static scene according to a specific spatial trajectory to achieve a scene change effect.

Scene change method and system combining instance segmentation and cycle generative adversarial networks

A method and system for configuring regenerative braking energy recovery devices in urban rail transit provided by the present application, successively including the following steps: calculating a preliminarily configured capacity Pof a regenerative braking energy recovery device predetermined for the traction substation n, then obtaining an optimally configured capacity Qof the regenerative braking energy recovery devices; further, configuring the total number of the regenerative braking energy recovery devices; finally, configuring the type of the regenerative braking energy recovery devices. By reasonably configure the capacity and number of regenerative braking energy recovery devices in traction substations, the configuring method of the present application allows the regenerative braking energy generated by a train during braking to be completely absorbed, thus reduce the energy consumption of braking resistors. Meanwhile, the waste of idle regenerative braking energy recovery devices is avoided, and the acquisition cost of devices is reduced. By reasonably configuring the type of regenerative braking energy recovery devices, the deficiencies of a single regenerative braking energy recovery device can be avoided.

Method and system for configuring regenerative braking energy recovery devices in urban rail transit

A sliding-type locking buckle comprises a casing and a locking buckle body. The casing comprises an upper casing, a lower casing, and an inner cavity. The locking buckle body comprises an upper body, a lower body, and a compression spring. The upper casing is provided with an upper sliding slot. The inner wall of the upper casing is provided with a plurality of sawteeth along the length direction of the upper sliding slot. The lower body is located in the inner cavity. The top of the upper body protrudes out of the upper sliding slot. A lateral surface of the upper body is provided with a limiting protrusion. The limiting protrusion is provided with a sawtooth portion.

Sliding-type locking buckle

Materials for, and methods of, colorizing a metallic surface with micro-gratings using vibration cutting technologies are provided. Micro-gratings on aluminum, brass, and stainless steel surfaces can be rapidly created to effect, under illumination, at least one color observable in the visible spectrum using elliptical vibration texturing, a vibration-assisted mechanical cutting process. The modified metallic surface can display multiple visible colors, an iridescent effect caused by changes in one or more cutting parameters employed to produce the micro-gratings, the angle of illumination by an incident light, and/or the viewing angle of the surface under illumination.

Method and apparatus for structural coloration of metallic surfaces

A die sorting apparatus for a wafer is provided that associates logical positions of each die from a map file for storing records of testing information based upon testing performed on individual dice comprised in the wafer with its physical position as illustrated by an image acquired by an image capturing device showing physical positions of the dice, after the dice have been singulated. A processing device can thus determine actual physical positions of the dice for reference by a die pick-up device configured to selectively pick up dice that meet predetermined criteria according to the testing information from their actual physical positions as determined.

Die sorting apparatus and method

Growing community of inventors

Qingdao, China

Yang Yang