Sichuan University

Southwest Petroleum University

Freescale Semiconductor,inc.

Ge Medical Systems Global Technology Company, LLC

Sichuan Xieming Technology Co, Ltd.

Huawei Technologies Co., Limited

Chengdu University of Technology

Tai-sol Electronics Co., Ltd.

Pangang Group Research Institute Co., Ltd.

Nxp Usa, Inc.

Jun Li

Yao Xiao

Ying Liu

Hongxing Chen

Renquan Wang

Lin Yang

Jialin Tian

Bin Wang

Wu Zhao

Ximiao Cao

Lei Cha

Bo Wu

Xin Guo

Yanniu Ren

Xingyu Chen

Miao Yu

Kai Zhang

Tiefeng Shi

Haolin Song

Yu Wei

Yiwei Jiang

Bing Lai

Chong Jiang

Zhe Zhang

Bo He

Shuo Li

Rui Wang

Xue Wang

Jiaqin Dong

Pingli Liu

Zhifeng Luo

Wei Zeng

Quan Xu

Wei Jiang

Yanzhao Pang

Juan Du

Lan Ren

Dong-Chu Feng

Jian Yang

Peng Wang

Zhefeng Xu

Lanhui Mao

Zhenhua Xu

Xianfeng Li

Nianyin Li

Xiang Chen

Xuben Wang

Jianfa Wu

Liping Zhang

Yinglin Yang

Chen Wang

Honghui Wang

Guangle Yao

Ruijia Li

Xiaoyu Xu

Siyuan Sun

Haoqing Zheng

Mingyue Yang

Zechuan Huang

Wenlong Zhou

Cong Xiao

Zhengwei Xu

Shengxian Liang

Xingwu Guo

Shang Gao

Jian Zou

Xitang Lan

Changlong Liu

Disclosed are an anisotropic nanocrystalline rare earth permanent magnet and a preparation method thereof. The rare earth permanent magnet includes an RE-Fe—B matrix phase and a second phase, wherein the RE-Fe—B matrix phase includes main phase REFeB flaky nanocrystallines regularly arranged and an RE-rich phase around main phase grains, the main phase REFeB flaky nanocrystallines having an average grain size in a length direction of 70 nm to 800 nm and an average grain size in a thickness direction of 30 nm to 200 nm; and the second phase includes at least one selected from the group consisting of an M-Cu phase and an M-Cu—O phase, M being at least one selected from the group consisting of Ca and Mg.

Anisotropic nanocrystalline rare earth permanent magnet

Anisotropic nanocrystalline rare earth permanent magnet and preparation method thereof

Disclosed are a method for preparing an anisotropic flake nanocrystalline rare earth permanent magnet material and a rare earth permanent magnet material. In the disclosure, the method includes: step 1, preparation of a precursor flake nanocrystal magnetic powder, where a number of grains of flake nanocrystals inside the precursor flake nanocrystalline magnetic powder accounts for not less than 85% of a total number of grains inside the precursor flake nanocrystalline magnetic powder; step 2, orientation treatment by hot deformation: subjecting the precursor flake nanocrystalline magnetic powder or a green body prepared from the precursor flake nanocrystalline magnetic powder to the hot deformation, such that flake nanocrystals are regularly arranged; and step 3, post-processing for optimizing orientation.

Method for preparing anisotropic flake nanocrystalline rare earth permanent magnet material and rare earth permanent magnet material

A method of enhancing an abnormal area of a ground-penetrating radar image based on hybrid-supervised learning includes the steps of: building a database including a real image set, a simulation image set and a simulation image label set; adopting a generative adversarial network; processing semi-supervised training and unsupervised training alternately to obtain a trained model, then inputting a real radar image with abnormal area that needs to be enhanced into the model and processing through the generative network to output an abnormal-area-enhanced image. The method overcomes the problems of differences in characteristics between simulated images and real images, and low utilization efficiency of real image information by unsupervised methods, and improves the utilization efficiency of the enhanced network for real image information, the saliency of abnormal areas on real images, and the generalization ability of the enhanced network, therefore effectively enhances the significance of abnormal areas in ground-penetrating radar images.

Method of enhancing abnormal area of ground-penetrating radar image based on hybrid-supervised learning

A high-frequency composite impactor including a high-frequency axial and a torsional impact assembly is disclosed. The high-frequency axial impact assembly includes an upper self-excited oscillation cavity, a lower self-excited oscillation cavity, an adjustment block and a lock nut. The torsional impact assembly includes an upper end cover, a reversing switch, a pendulum, a lower shell, a lower end cover, a nozzle, a connecting block and a retaining ring. The high-frequency axial impact assembly converts the flowing drilling fluid into a pulsed jet to achieve a high-frequency axial impact. The torsional impact assembly enables a torsional impact through a shunt, and finally enables a high-frequency composite impact, which can effectively reduce the stick-slip of the drill string, jump drilling and other downhole accidents. By reducing the friction between the drill string and the borehole wall, the impactor can reduce WOB loss, increase the ROP, and improve the drilling efficiency.

High-frequency composite impactor

A method for extracting a kansei adjective of a product based on principal component analysis and explanation (PCA-E) includes constructing a product kansei evaluation vector matrix through original kansei adjectives; performing dimensionality reduction through PCA; and determining, based on principal component load factors, kansei adjectives representing principal components. In this way, the kansei adjectives extracted are explanatory to help users understand the selected kansei adjectives and make accurate evaluation.

Method for extracting kansei adjective of product based on principal component analysis and explanation (PCA-E)

A drill string rotation controller includes an anti-torque balance module, a TC bearing retaining ring, an upper TC bearing, an upper thrust ball bearing, an upper Haval ring, a middle seal retaining ring, an upper mandrel, an upper shell, a rotary control cylinder, an upper spring, a spline shell, a spline sleeve, a spline mandrel, a lower shell, a spring push sleeve, a lower spring, a floating piston, a lower mandrel, a bulkhead, a lower thrust ball bearing, a lower Haval ring, a lower TC bearing, a conversion joint, an anti-drop joint, a lower joint, and a control pin. The rotary control cylinder causes the spline sleeve to switch the transmission relationship between the spline mandrel and shell. Therefore, the drill string rotation controller controls the conversion between the composite drilling mode and the directional drilling mode.

Drill string rotation controller for directional drilling

The present invention relates to a bionics-based efficiently transported and packed proppant and preparation method thereof, comprising enhanced fracturing fluid and biomimetic dandelion proppant; the mass ratio of the enhanced fracturing fluid and the biomimetic dandelion is: 1-2:100-400; the 100 pbw of enhanced fracturing fluid includes 0.1-1 pbw of drag reducing agent, 0.01-0.1 pbw of cleanup additive, 0.2-0.8 pbw of clay stabilizer, 0.01-0.05 pbw of bactericide, 0.01-0.2 pbw of nanoparticle enhancer, and water; the biomimetic dandelion proppant consists of modified proppant and modified fiber, and the mass ratio between the modified proppant and the modified fiber is 99-99.9:0.1-1.

Bionics-based efficiently transported and packed proppant and preparation method thereof

Disclosed are a hybrid density abrupt interface inversion method based on machine learning constraints. The inversion method includes constructing an initial basin interface and randomly generating a disturbed basin interface data set; obtaining a basin interface data set through Hadamard product operation on the initial basin interface and the disturbed basin interface data set; obtaining a high-resolution density interface model data set through filling the basin interface data set with advanced functions; performing forward calculation to obtain a simulated gravity data set; carrying out mathematical transformation on the simulated gravity data set and weighting to obtain a low-resolution migration density interface model data set; optimizing a migration model-based deep learning network and mapping to obtain a high-resolution constrained density interface prior model; and constructing a stable nonlinear loss function and performing regularization inversion to obtain a high-resolution density interface model.

Density abrupt interface inversion method and system based on machine learning constraints

A preset three-stage adjustable downhole choke with choking and pressure measurement functions includes an intake assembly for natural gas filtration, an electrically-controlled telescopic assembly for positioning and clamping the downhole choke with a prefabricated seating nipple, and a three-stage choking assembly for natural gas choking and depressurization. The intake assembly, the electrically-controlled telescopic assembly, and the three-stage choking assembly are sequentially communicated from bottom to top. A first-stage control choke, a second-stage adjustable control choke, and a third-stage control choke are sequentially provided in a gas passage of the three-stage choking assembly from bottom to top. The preset three-stage adjustable downhole choke features convenient installation and removal, three-stage choking and depressurization, and an adjustable orifice diameter of a control choke, and can achieve different choking and depressurization effects.

Preset three-stage adjustable downhole choke with choking and pressure measurement functions

The invention relates to a coating for preventing intermetallic bonding, in particular to a water-based high-temperature-resistant titanium-steel anti-bonding coating and its use in the preparation process of titanium ingot. The water-based high-temperature-resistant titanium-steel anti-bonding coating of the invention includes the following components in parts by weight: 50-150 parts of water-based film-forming agent, 0-50 parts of Zn powder, 400-450 parts of AlOpowder, and 250-350 parts of talcum powder. The coating of the invention can avoid the bonding reaction with a roller or a winch of the steel equipment in the rolling or perforation process of a titanium tube at 900&#xb0; C., so as to improve the yield and the production efficiency of titanium material processing. Moreover, the process is simple and easy to operate, the coating is environment-friendly and pollution-free, and easy to prepare.

Water-based high-temperature-resistant titanium-steel anti-bonding coating and use thereof

A method for geometric calibration of a CT scanner, including, for each row of at least one row of detector cells, establishing a complete geometric description of the CT scanner, including at least one unknown geometric parameter, establishing a description of a forward projection function using the complete geometric description, acquiring actual projection coordinates of a calibration phantom placed in a scanning field of view (SFOV) on a current row of detector cells and corresponding to a plurality of angles, acquiring calculated projection coordinates of the calibration phantom on the current row of detector cells and corresponding to the plurality of angles using the description of the forward projection function, and acquiring a calibrated value for the at least one unknown geometric parameter by evaluating the at least one unknown geometric parameter based on the acquired actual projection coordinates and calculated projection coordinates via a nonlinear least square fitting algorithm.

Geometry calibration algorithm for large flat module detector CT scanner

A method for automatically determining the best effective reconstruction gap, the method including scanning a phantom to collect image data of the phantom, using a plurality of different gap values to reconstruct image of the phantom respectively, based on the image data, thus obtaining a plurality of images respectively associated with different gap values, selecting the best image from the plurality of images, and automatically determining the gap value associated with the best image, and save it as the best effective reconstruction gap.

CT apparatus and an image processing method used by the same

Systems and methods for translating an oscillating electrical signal from a first impedance to an input impedance of a load include an adaptor that further includes at least one coaxial portion and an antenna portion. The at least one coaxial portion has a first end and a second end, and is configured to translate the oscillating electrical signal to the input impedance of the load. The antenna portion is coupled to the second end of the at least one coaxial portion and is disposed within the load. The antenna portion is configured to radiate electromagnetic signals corresponding to the oscillating electrical signal into the load.

Systems that include microwave adaptors and methods of their operation

An apparatus for signal bandwidth compensation is disclosed. The apparatus includes: a digital predistortion filtering unit, a compensation filter, a conversion unit, and a power amplifier; where the digital predistortion filtering unit receives an original signal, performs predistortion processing on the original signal; the compensation filter receives the predistortion signal, compensates for distortion caused during a process of transmitting the predistortion signal to the power amplifier, and outputs a compensated predistortion signal to the conversion unit; the conversion unit receives the compensated predistortion signal, converts the compensated predistortion signal into an analog signal, performs frequency mixing processing, and outputs a predistortion signal experiencing the frequency mixing to the power amplifier; the power amplifier receives the predistortion signal experiencing the frequency mixing, amplifies the predistortion signal experiencing the frequency mixing, and outputs an amplified signal.

Method for implementing compensation filter and apparatus for signal bandwidth compensation

Growing community of inventors

Chengdu, China

Jun Li