Tencent Technology (shenzhen) Company Limited

The South China University of Technology

Shantou Institute of Ultrasonic Instruments Co., Ltd.

Guangdong Brunp Recycling Technology Co., Ltd

Hunan Brunp Recycling Technology Co. Ltd.

Brosmed Medical Co., Ltd.

Guangdong Topnice New Materials Technology Co., Ltd.

Zte Corporation

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Byd Company Limited

Hunan Brunp Ev Recycling Co., Ltd.

Shenzhen Sunxing Light Alloys Materials Co., Ltd.

Hunan Brunp Vehicles Recycling Co., Ltd.

Guangdong Appscomm Co., Ltd

Yichang Brunp Recycling Technology Co., Ltd.

Bin Li

Liexiang Fan

Yu Wei Chen

Delai Li

Zhonghong Wu

Zhaohui Wu

Yu Wang

Jing He

Changdong Li

Dingshan Ruan

Min Xiao

Zhijian Chen

Zhijun Zhang

Junshan Wang

Zengyong Zheng

Xin Wang

Haijun Yu

Xuemin Chen

Aixia Li

Guang Yang

Yinghao Xie

Cheng Luo

Qingdong Ye

Pengfei Yu

Wei Biao Zhou

Xiuyin Zhang

Feng Wu

Yingsheng Zhong

Yongxin Wang

Xiaomu Wen

Chaosheng Liu

Xiuxing Du

Changjian Zhou

Linlin Mao

Zhaohua Zeng

Fucai Liu

Feifei Wang

Baoye Liu

Maohua Feng

Xingyu Wu

Jingfeng Guo

Shan Gao

Ziying Wu

Lijun Qiao

Chengdai Xue

Xiao Bo Chen

Zhongyun Wei

Xiaogao Zhou

Guangyin Feng

Zichun Chen

Jinhao Lin

Haomiao Qiu

Yuqiang Kang

Liwei Wang

Zehang Cai

Shaohui Chen

Yijie Chen

Xiaoming Zhou

Weiwu Chen

Shutian Su

Junyi Huang

Chuanbo Wang

Wei Gu

Rui Xiao

Caican Lin

Fei Xiang

Han Lu

Hexi Zeng

Chungpeng Wang

Xinqiu Xie

Herning Huang

Shaolin Zhou

Jing Cong Chen

Yinan Huang

Mengran You

Yuyang Liu

Yanqi Zheng

Shenghe Tang

Xurui Zeng

Peifeng Chen

Zhiming Liang

Heming Huang

An automatic myocardial segmentation method in two-dimensional echocardiography includes: calculating and extracting ridge information in two-dimensional echocardiography; extracting image skeleton data, and connecting fragmented skeleton data to obtain continuous skeleton data by using interpolation; screening the continuous skeleton data, and extracting two optimal paths from a top to a bottom based on a myocardial feature to obtain left and right myocardial skeletons; extracting a set of feature point candidates from the left and right myocardial skeletons, and selecting a pair of key matching feature points from the set of feature point candidates as anchor points based on the myocardial feature; entering anchor point data and left and right myocardial skeleton data in a mathematical model of heart chambers to fit the morphology of heart chambers and obtain an initial myocardial contour; and constructing a myocardial feature energy equation.

Automatic myocardial segmentation method in two-dimensional echocardiography

A cutting balloon catheter with concealed blades is provided. A pressure channel communicated with the balloon is formed by a gap between the outer tube and the inner tube. The cutting assembly includes first support rings sleeved on the outer tube and a blade group, the first support rings are capable of generating radial elastic deformation and sliding freely. The push-pull tube is sleeved on the outer tube, and the protective bag is configured to encapsulate the balloon and the cutting assembly. When the cutting assembly is pushed to the balloon, after the balloon is expanded, the blade group cuts a section of the protective bag opposite to the balloon to expose the blade group. The catheter can pass through the complex and tortuous blood vessels to reach the lesion site, and realize effective cutting while reducing the damage to the blood vessels.

Cutting balloon catheter with concealed blades

A calibration method and a tuning method for an on-chip differential active RC filter are provided. The calibration method comprises: obtaining zero-crossing time of a differential signal outputted by a single-pole point real number filter by analyzing the single-pole point real number filter; setting a reference clock period according to the relationship between the zero-crossing time and the bandwidth of the single-pole point real number filter, and setting a calibration working time sequence according to the reference clock period; and scanning an RC configuration of an RC array according to the calibration working time sequence to realize calibration of the RC array.

Calibration method and tuning method for on-chip differential active RC filter

Disclosed are a convex-linear bi-plane probe and its application method in prostate volume calculation. The present invention adopts the following technical solution: comprising a probe housing and a probe assembly contained in the probe housing, the probe assembly comprising a linear probe and a convex probe contained at the end of the linear probe, with the linear element inside the linear probe and the convex element inside the convex probe connected as one piece. The benefits of the present invention are that: by setting a convex probe at the end of the linear probe, and by connecting the linear element and the convex element as one, the volume of the probe can be significantly reduced. Furthermore, the use of convex-linear biplane probe and its integrated design collect two orthogonal ultrasound images of the prostate, which improves the accuracy of prostate volume calculation.

Convex-linear bi-plane probe and its application method in prostate volume calculation

The present application provides an information transmission method, a reflecting device, a base station, a system, an electronic device, and a medium. The information transmission method includes: acquiring communication information sent from a base station, where the communication information is carried by means of a communication signal; and reflecting, according to a reflection weight of a reflecting device, the communication signal to an airborne terminal by means of a beam corresponding to the reflection weight.

Information transmission method, reflecting device, base station, system, electronic device, and medium

The present disclosure relates to the field of ultrasonic detection, in particular to a craniocerebral ultrasonic standard plane imaging and automatic detection and display method for abnormal regions. The following technical solution is adopted: contour detection is performed on the scanned ultrasound images the skull to construct a skull surface model, and the standard planes in ultrasound images are identified and extracted according to the skull surface model. The symmetry of the standard planes in ultrasound images is used to compare the similarity, so as to obtain the abnormal regions for segmentation and display. The advantages of the present disclosure are as follows: the skull surface model is constructed by detecting the cranial edge, and the coordinate system is established based on this model, thereby the standard planes in ultrasound images can be quickly identified from the scanned ultrasound images.

Cranial ultrasonic standard plane imaging and automatic detection and display method for abnormal regions

A drug coated balloon includes a balloon body and a drug loaded coating layer. The drug loaded coating layer includes a first drug loaded coating component having at least two controllable sustained release drugs with different drug release kinetics, and a second drug loaded coating component including an active drug. The second drug loaded coating component is dispersed among the controllable sustained release drugs and couples the controllable sustained release drugs on the balloon body. The first and second drug loaded coating components are both non-hydrophilic compositions. The drug coated balloon provides sufficient initial drug loading dosage to the lesion site, and has adjustable drug release rate, thereby allowing the drug coated balloon to provide bioactive drugs to the treatment site at different stages of the cascade reaction of vascular restenosis, providing the controllable long-acting therapeutic drugs, and improving the overall vascular drug release efficacy.

Drug coated balloon and preparation method thereof

The invention belongs to the technical field of material synthesis, and discloses a nitrogen-doped hollow cobaltosic oxide and a preparation method and application thereof. A chemical formula of the nitrogen-doped hollow cobaltosic oxide is CoO—COF-T-D@C—N; and the COF-T-D is a covalent organic framework. Due to an open hollow structure, the nitrogen-doped hollow cobaltosic oxide of the invention has a large specific surface area, thus having a large contact area with an electrolyte, which is convenient for lithium ions to transport therein. The open hollow structure also prevents a volume effect from being generated during charging and discharging, and nitrogen is introduced for doping, so that granules can be gradually activated to increase the specific surface area and active sites, a discharge (cycle) stability of the material is improved, and a rate performance of the material is improved.

Nitrogen-doped hollow cobaltosic oxide and preparation method and use thereof

Disclosed are a high-nickel sodium ion cathode material and a preparation method therefor and a battery, wherein a chemical formula of the high-nickel sodium ion cathode material is NaNiCoMnO·fCNP—Al/tMVO, wherein a+b+c=1, 0.5≤a<1, 0<b≤0.25, a/b≥2.5, 0<c≤0.3, 0<t≤0.1, 0<f≤0.1, and M is at least one of sodium, copper, zinc, zirconium or ammonium.

High-nickel sodium ion positive electrode material and preparation method therefor and battery

An organic fiber toughened inorganic composite artificial stone panel and a preparation method thereof are disclosed. The panel includes a surface layer, an intermediate organic fiber toughened layer and a toughened base layer. The surface layer includes the following components: 40-70 parts of quartz sand, 20-30 parts of quartz powder, 20-45 parts of inorganic active powder, 0.5-4 parts of pigment, 0.1-3 part of water reducing agent and 3-10 parts of water. The intermediate organic fiber toughened layer includes the following components: 40-60 parts of inorganic active powder, 45-65 parts of sand, 0.8-1.5 parts of water reducing agent, 6-14 parts of water and 4-8 parts of organic fiber. The toughened base layer includes the following components: 30-50 parts of inorganic active powder, 30-55 parts of quartz sand, 15-20 parts of quartz powder, 0.5-1.2 parts of water reducing agent, 4-8 parts of water and 0.8-2.5 parts of toughener.

Organic fiber toughened inorganic composite artificial stone panel and preparation method thereof

A chopper amplifying circuit employing a negative impedance compensation technique, including a differential input end, a first-level chopper switch, a first-level amplifying circuit, a second-level chopper switch, a second-level amplifying circuit, a negative impedance converting circuit, a negative feedback unit, an input capacitor, and a differential output end, is provided. The differential input end is connected to the first-level chopper switch. An output terminal of the first-level chopper switch is connected to the first-level amplifying circuit through the input capacitor. The first-level amplifying circuit is connected to the second-level chopper switch, which is connected to the second-level amplifying circuit. The second-level amplifying circuit is connected to the differential output end, and is also connected to a feedback input end of the first-level amplifying circuit through the negative feedback unit. The negative impedance converting circuit is parallel-connected to a signal input end of the first-level amplifying circuit.

Chopper amplifying circuit employing negative impedance compensation technique

A first-order estimation method of shear wave velocity, includes the steps of demodulating entry data, and obtaining a complex angle value, matrix average, offset matrix, displacement matrix and shear wave velocity. According to the method, the main contour of the displacement curve is extracted by the quadrature decomposition of matrix, thereby improving the signal quality of the shear wave estimation. Unlike conventional method which needs estimating twice, the shear wave displacement curve can be estimated directly to reduce estimation errors and improve estimation efficiency.

First-order estimation method of shear wave velocity

Disclosed are a pre-lithiated lithium ion positive electrode material, a preparation method therefor and use thereof. The lithium ion positive electrode material has a chemical formula of LiO/[AMe]-LiAO, wherein A comprises M, and wherein M is at least one of Ni, Co, and Mn; and wherein Me is at least one of Ni, Mn, Al, Mg, Ti, Zr, Y, Mo, W, Na, Ce, Cr, Zn or Fe; and wherein 0<x<0.1. The material is co-doped with multiple elements, and these elements act synergistically to inhibit the irreversible phase change at a high voltage and improve the stability of the structure of a substrate. The spinel phase AMeOstructure contains the doping elements, which work together to improve the interfacial activity of the material and introduce more electrochemically active sites.

Pre-lithiated lithium ion positive electrode material, and preparation method therefor and use thereof

This disclosure discloses a single-inductor multiple-output DC-DC buck converter, which includes a power conversion unit and i charge controllers, as well as a phase-locked loop, a logic unit, a driving unit, and an input trunk duty ratio generation unit. The charge controllers are connected to the driving unit through the logic unit. The logic unit is further connected to the phase-locked loop and the phase-locked loop is connected to the driving unit through the input trunk duty ratio generation unit. The driving unit is connected to the power conversion unit. The disclosure applies charge control to every output branch path, and adopts a phase-locked loop as the cycle control, which effectively suppresses the cross modulation effect of every branch path, and does not require the last branch path to have a sufficiently heavy load, which broadens the load range, while taking into account other performance requirements concurrently.

Single-inductor multiple-output DC-DC buck converter

A frequency locking method for a phase-locked loop comprises the following steps: S1, a frequency control module controls a numerically controlled oscillator to obtain an maximum output frequency and a minimum output frequency; S2, obtain a minimum frequency ratio and a maximum frequency ratio by means of a time-to-digital converter and the frequency control module; S3, calculate a first frequency control word and a first frequency ratio according to the minimum frequency ratio and the maximum frequency ratio; S4, the frequency control module uses the Newton's iterative method to recalculate a new frequency control word; S5, obtain a new frequency ratio according to the new frequency control word; S6, if the new frequency ratio is within an error range, end iteration and stably output the new frequency control word, and otherwise, jump to step S4.

Frequency locking method and circuit for phase-locked loop

Growing community of inventors

Guangdong, China

Bin Li