Huawei Technologies Co., Limited

Chengdu University of Technology

University of Electronic Science and Technology of China

Sichuan University

Nio Technology (anhui) Co., Ltd.

Chengdu Fit-future Technology Co., Ltd

Chinese Academy of Sciences

University of Pennsylvania

Thales Cetc Avionics Co., Ltd.

Cetc Avionics Co., Ltd.

Beijing Institute of Spacecraft Environment Engineering

Zhongke Xinghe (shandong) Intelligent Technology Co., Ltd.

Yang Yang

James M Wilson

Xiaohu Tang

Hao Kai Zhang

Bin Yang

Jiping She

Ying Zhong

Fei Wang

Min Yan

Wei Lin

Chao Wang

Jing Jiang

Zezhan Zhang

Jun Hu

Jianping Wang

Xianfu Lei

Yueming Wang

Ming Gan

Hui Li

Qian Wang

Dandan Liang

Pengfei Wang

Yang Li

Bo Yang

Ying Duan

Xun Yang

Jian Ding

Yalin Liu

Jian Ye

Wei Bin Lin

Heping Xie

Ling Chen

Mingzhong Gao

Chenchen Liu

Jiong Chen

Zetian Zhang

Zhilong Zhang

Ru Zhang

Yi Liu

Wei Huang

Lili Wang

Yuhua Cheng

Yubin Gong

Jianan Li

Xinyang He

Min Ren

Tao Song

Li Ren

Xueke Gou

Wenwu Zhang

Yunyue Cai

Chendi Lou

Weiqiang Ling

Yihang Li

Yu Liu

Yu Zhang

Jingyu Tong

Hongchuan Jiang

Jiexiong Ding

Li Du

Chengui Zhang

Jianjun Ni

Kun Xiao

Wenjing Ma

Gege Teng

Jianyong Zhang

Heng Gao

Shiyu Zhang

Yan Shi

Houjun Wang

Hanjun Kou

Dake Liao

Wenyang Zhang

Zijun Chen

Lei Zheng

Yuan Gao

Chen Wang

Jiangnan Fu

Zhi Gu

Chunhai Guo

Zhengchun Zhou

Tianrun Zhang

Zheng Wang

Haibo Jiang

Hengguang Cai

Xihui Du

Yufan Guo

Yin Zhong

Yue Li

Shaomeng Wang

Huiyuan Geng

Chengbo Gui

Jie Tong

Jiucheng Cai

Yushi Nong

Fei Tang

Jun Wei Li

Guanchang Pan

Kun Chang

An example physical layer protocol data unit (PPDU) transmission method includes generating, by a first communication device, a PPDU, where the PPDU includes a long training field (LTF) sequence. The first communication device can send the PPDU. A second communication device can receive the PPDU. The second communication device can parse the received PPDU to obtain the LTF sequence included in the PPDU.

Physical layer protocol data unit transmission method and apparatus

Embodiments of this application provide a method and an apparatus for transmitting a physical layer protocol data unit, to design a short training field sequence for a larger channel bandwidth. The short training field sequence designed in this application has a smaller peak-to-average power ratio PAPR and better performance. The method includes: generating a physical layer protocol data unit PPDU that complies with the 802.11be standard, where the PPDU includes a short training field, and a quantity of subcarriers of a frequency domain sequence of the short training field is greater than 2048; and sending the PPDU on a target channel, where a bandwidth of the target channel is greater than or equal to 160 MHz.

Method and apparatus for transmitting physical layer protocol data unit

An assembly method for a deep in-situ high-fidelity coring calibration platform includes the following steps: S: fixing a core bin assembly subsystem on a preset ground foundation and fixing a simulator of a core bin on a mounting base plate of the core bin assembly subsystem; S: driving a cylinder and driving the mounting base plate to move to a preset position; S: driving a servo motor and controlling two clips to move close to each other; S: fixing a drill pipe bin assembly subsystem on the ground foundation; S: assembling multiple sections of a drill pipe bin in turn; aligning and connecting a bottom of the drill pipe bin to the simulator, and aligning and communicating the top of the drill pipe bin with the lower part of an adaptive drill pipe guide structure; and S: driving the adaptive drill pipe guide structure to perform accurate positioning.

Assembly method for deep in-situ high-fidelity coring calibration platform

An automatically-cleanable thickening performance evaluation instrument for drilling LCMs includes a cleaning device, a kettle body, a thickening motor, a heating component, a test ending component, a top cover, and a bottom cover, where upper and lower ends of the kettle body are both opened; the kettle body is arranged in a third bearing inner race, a third bearing outer race is connected to a first limb, and the first limb is configured to limit a position of the kettle body; and the kettle body is detachably connected to the thickening motor and driven by the thickening motor to rotate. The instrument can realize electric heating and air pressurization to simulate the underground environment, and the kettle body can be completely sealed, such that a measured thickening time is close to an actual thickening time. Moreover, the instrument can be automatically cleaned at the end of a test.

Automatically-cleanable thickening performance evaluation instrument for drilling lost circulation materials

Magnetic septum nose ring

The invention relates to an automated driving control system, including: a data exchange unit configured to obtain video data streams and distribute the video data streams to at least one computing unit; the at least one computing unit configured to compute perception result data based on the video data streams; a sensor fusion unit configured to fuse the perception result data and sensor data, to obtain fusion result data; and a planning control unit configured to generate a driving control instruction based on the fusion result data, where the planning control unit or the sensor fusion unit is configured to provide a bypass of the data exchange unit. When anomalies occur in any of the units, the automated driving control system may provide a corresponding bypass to keep an automated driving function going.

Automated driving control system and automated driving control apparatus

This application discloses a method including a transmit end that generates and sends a physical layer protocol data unit (PPDU), and a receive end that receives the PPDU and parses the PPDU. An enhanced directional multi-gigabit (EDMG) modulation field in the PPDU includes a channel estimation field (CEF), the CEF includes a CEF sequence, and a length of the CEF sequence is m, where m is determined based on a quantity of bonding channels and a quantity of subcarriers included on a channel. When a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) technology is introduced into a 60 GHz WLAN standard, an applied CEF sequence included in a CEF can be determined, and DFT-S-OFDM transmission is further performed by using the CEF sequence. In this way, a PAPR of a WLAN system can be reduced while frequency division multiplexing for a plurality of users is supported.

Data transmission method and apparatus

A multi-source domain adaptation model by aligning partial features includes a general feature extraction module, a feature selection module for partial feature extraction with the dedicated loss function, three partial feature alignment losses, and two classifiers for adversarial training, where the three partial feature alignment losses include an intra-class partial feature alignment loss, an inter-domain partial feature alignment loss, and an inter-class partial feature alignment loss. With the partial features extracted by the general feature extraction module and the feature selection module following three different partial feature alignment losses, the model is capable of clustering the samples from the identical categories and isolating samples from distinct classes.

Model and method for multi-source domain adaptation by aligning partial features

The invention provides a suspension modifier directly added into fracturing fluid for real-time proppant modification during fracturing and the application thereof, relating to the field of oil and gas production technologies. The suspension modifier is a controlled release nanoemulsion and comprises surface hydrophobic modifier, surfactant, cosurfactant and water. The suspension modifier is directly added into clear-water or active-water fracturing fluid while the proppant is added into water. After stirring, the suspension modifier is capable of self-assembling and being adsorbed on the proppant surface, so that the proppant surface becomes hydrophobic and aerophilic. The invention no longer requires the proppant to be pretreated, and the bubble-suspended proppant can be obtained directly by adding the suspension modifier to the clear-water or active-water fracturing fluid, and meanwhile adding the proppant to the fracturing fluid. This technology is not only easy to operate, but also low in cost for proppant treatment.

Suspension modifier directly added into fracturing fluid for real-time proppant modification during fracturing and the application thereof

This application relates to the field of communications technologies, and discloses a data transmission method. The method includes: generating a PPDU; and transmitting the PPDU to at least one receive end. The PPDU includes a channel estimation field CEF, and the CEF includes a plurality of sub-sequences. For each of the plurality of sub-sequences, a part or all of elements in the sub-sequence are basic elements, and the basic elements are arranged into a Golay sequence or a ZC sequence in the sub-sequence. This application is used for data transmission.

Data transmission method, apparatus, and system

Fitness mirror

A dynamic damage evaluation instrument of drilling fluid based on a glass core includes a controller and a support. A kettle body is provided on the support, a well for receiving drilling fluid is provided inside the kettle body, and a well cover is provided at an upper end of the kettle body. A core holding assembly communicating with the well is provided at a side of the kettle body, and a metering assembly is movably provided at the other end of the core holding assembly. A stirrer for stirring drilling fluid is provided inside the well, and a power component for driving the stirrer is provided outside the kettle body. A data detection hole for mounting a temperature and pressure sensor and a pressurization hole for mounting a pressurization device are formed on the well cover.

Dynamic damage evaluation instrument of drilling fluid based on glass core

The present invention discloses a method for proppant suspension and suspension parameter optimization based on bubble bridge effect, comprising: select a proppant and hydrophobically modify its surface to obtain a hydrophobically surface-modified proppant; prepare a bubbly fracturing base fluid; make the first optimization of the base fluids according to the average radius of the proppant and the average radius of the bubbles of the base fluids; optimally select the base fluids selected for the second time according to the interaction energy between the proppant particle and the bubble after the hydrophobically surface-modified proppant mixed with the base fluid; the basic parameters of the bubbly fracturing base fluid selected at the third time were used for the perfect selection for proppant suspension. The present invention establishes a procedure on experimental evaluation and parameter calculation optimization by suspending fracturing proppant with the bubble bridge effect on the hydrophobic surface.

Method for proppant suspension and suspension parameter optimization based on bubble bridge effect

In this application, a manner of generating a modulated field STF is enriched, so that a manner of generating a PPDU is enriched, thereby improving data transmission flexibility. The method includes: After generating a PPDU, a transmit end sends the PPDU to at least one receive end, where the PPDU includes at least one modulated field STF, the modulated field STF includes a plurality of zero elements and a plurality of non-zero elements, m1 zero elements are included before a first non-zero element, m2 zero elements are included after a last non-zero element, m1+m2 zero elements are included between any two adjacent non-zero elements, m1 and m2 both are positive integers, and the modulated field STF is mapped to a plurality of consecutive subcarriers for transmission. This application is used for data transmission.

Nose ring set

Growing community of inventors

Chengdu, China

Yang Yang