Tsinghua University

Shandong Yuhuang Chemical Co., Ltd.

Samsung Electronics Co., Ltd.

Jinfu Wang

Tiefeng Wang

Shengwei Wang

Shuangxi Chen

Qiang Tang

Ke Lin

Weihua Zhang

Fei Wei

Dezheng Wang

Changwei Wang

Tianpeng Li Zhou

Yuqiang Wang

Yanyan Zheng

Jiajia Luo

Cunfu Zhu

The disclosure relates to a communication method and system for converging a 5-Generation (5G) communication system for supporting higher data rates beyond a 4-Generation (4G) system with a technology for IoT. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. An image processing method and apparatus, electronic device and computer readable storage medium, which belong to image processing field are provided. The method and apparatus, electronic device and computer readable storage medium include segmenting an image to be processed to obtain a target region in the image to be processed, and performing style transfer on the target region. The solution provided may effectively improve effects of image processing, and better meet requirements of practical application.

Image processing method and apparatus, electronic device and computer readable storage medium

Equipment for producing ethylene and/or acetylene from hydrocarbons, including the reaction chamber (), burner (), common or separate fuel gas inlets () and oxygen inlets (), preheating tubes (), a gas distributor (), cracking gas inlets (), and a reaction product outlet (); the gas distributor (), which has multiple gas inlets and gas outlets, is arranged on the cross section of the reaction chamber (), where the gas inlet is connected to the cracking gas inlet (), and the gas outlet is connected to the preheating tube (). The cracking gas is uniformly distributed through the gas distributor () and passed through the preheating tubes (), which are hollow tubes; the opening at the other end of the hollow tube is close to or inserted into the combustion area of the gaseous fuel and oxygen.

Apparatus and method for preparing ethylene and/or acetylene using hydrocarbon

The invention belongs to energy chemical technical field, especially relates to a fluidized bed reactor and a method for preparation of polyoxymethylene dimethyl ethers from dimethoxymethane and paraformaldehyde. The fluidized bed reactor comprises a gas inlet, a gas distributor, a catalyst inlet, a gas outlet, a fluid inlet, a catalyst outlet, a bottom component and an interstage component, a bottom component related gas upward channel, an interstage component related gas upward channel, a fluid outlet, a bottom downcomer and an interstage downcomer. A process for preparation of polyoxymethylene dimethyl ethers comprises the steps of: fluidizing gas is introduced into a bottom bed from the gas inlet via the bottom component related gas upward channel through the gas distributor; the fluidizing gas goes upwards and flows out of the reactor via the gas outlet; paraformaldehyde and dimethoxymethane are introduced into a bed through the fluid inlet; the fluid goes downwards and leaves the reactor via the fluid outlet. Compared with a conventional cannula reactor, the fluidized bed reactor improves the dispersion uniformity of catalyst and conversion of formaldehyde.

Fluidized bed reactor and method for preparing polyoxymethylene dimethyl ethers from dimethoxymethane and paraformaldehyde

A method for producing polyoxymethylene dimethyl ethers using fluidized bed reactor is provided. The fluidized bed reactor gives high conversion of feedstock during synthesis of polyoxymethylene dimethyl ethers. The product separation process includes pre-rectification, extractive rectification and vacuum rectification in series. In the pre-rectification process, the side-draw fraction PODEis recycled into the fluidized bed reactor, thus product distribution and selectivity to target components in the reactor can be improved. The extractive rectification process realizes coupling of neutralization, extraction, recovery of unconverted feedstock and products separation, thus significantly simplifies the process. The method for preparation of polyoxymethylene dimethyl ethers in this invention is simple, and has high conversion of feedstock, low energy cost and high selectivity to products.

Method for producing polyoxymethylene dimethyl ethers

A method and apparatus for measuring the gas amounts adsorbed on a powder which directly measures pressure changes in a gas supply chamber with the use of differential pressure sensors between the gas supply chamber and a reference chamber which gas amount is maintained constant. Calculations of the gas amounts adsorbed are based on the pressure changes in a sample cell and the pressure changes in the gas supply chamber or a gas reference chamber. The method and apparatus of this invention measures the adsorption or desorption isotherm or gas uptake at constant pressure curve of a powder with, as compared with presently available measurement techniques, increased accuracy and resolution. The experimental data can be analyzed to obtain information on the surface area, pore size distribution, pore volume, pore structure and diffusion coefficient of the powder.

Method and apparatus to measure gas amounts adsorbed on a powder sample

Growing community of inventors

Beijing, China

Jinfu Wang