State Grid Tianjin Electric Power Company

Electric Power Science & Research Institute of State Grid Tianjin Electric Power Company

Cardurion Pharmaceuticals, LLC

Imara Inc.

Tianjin Pipe (group) Corporation

Tianjin Petro-chemical Corporation

Medinus (tianjin) Technologies Co., Ltd.

Aerospace Precision Products Inc., Ltd

Jun Zhang

Jingyang Zhu

Niels Svenstrup

Jianshe Kong

Fenglai Sun

Jikui Sun

Huanming Xiao

Jinxu Sun

Rujian Ma

Xiao Meng

Yuyin Chen

Jing Wang

Chi Zhang

Wei Fan

Ke Xu

Chun He

Zhengzheng Meng

Xu Li

Qinghua Tang

Lei Yang

Xiaohui Zhu

Fengzheng Zhou

Longji Li

Bin Shi

Guojiang Zhao

Nan Wang

Yang Yu

Haoming Wang

Shengchen Fang

Pengxian Song

Tongshun Wang

Junmin Zhang

Hong Su

Hongxia Xia

Cheng Sun

Mingzheng Zhu

Junhua Zhang

Zhiqian Xu

Liang Qin

Xiaoqing Lu

Chunzhong Wang

Long Yan

Tao Chen

Fengwu Ma

Li Mei

Xujiang Sun

Chuan Wang

Bing Yang

Chongyuan Li

Baojian Yang

Binhong Xia

Wensheng Li

Guangming Jiao

Quanshi Cheng

Pengfei Zheng

Cryoablation equipment

Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Defect detection method, apparatus, and device for semi-conducting bedding layer of power cable

The present disclosure relates to processes for preparing 64(3s,4s)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl)-3-(tetrahydropyran-4-yl-7h-imidazo[1,5-a]pyrazin-8-one.

Process for the synthesis of 6-((3S,4S)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl)-3-(tetrahydropyran-4-yl-7H-imidazo[1,5-a]pyrazin-8-one

The present invention relates a process for the synthesis of 6-((3S,4S)-4-methyl-1-(pyrimidin-2 ylmethyl)pyrrolidin-3-yl)-3-tetrahydropyran-4-yl-7H-imidazo[1,5-a]pyrazin-8-one, comprising use of the chiral acid (+)-O,O-Dibenzoyl-D-tartaic acid.

Process for the synthesis of 6-[(3S,4S)-4-methyl-1-(pyrimidin-2-ylmethyl)pyrrolidin-3-yl]-3-tetrahydropyran-4-yl-7H-imidazo[1,5-a]pyrazin-8-one

A threaded connector including female thread and male thread. The female thread is symmetrically disposed on both ends of a coupling. The male thread is disposed at an end of a pipe. The female thread includes buttress thread. A torque shoulder is disposed in front of the buttress thread. The female thread is connected to the torque shoulder via a tool withdrawal groove. A protruding threaded segment is disposed on any one of a fourth to seventh tooth of the female thread to prevent high pressure gas from leaking.

Threaded connector

This invention relates to a single crystallization process for purification of dimethyl terephtalate (DMT) by film crystallization, including pumping the raw DMT into a film crystallizer and reducing its temperature to form DMT crystalline on the walls of the crystallizing pipes in the crystallizer, and then heating the crystallizing pipes and collecting the melt at 140.degree.-145.degree. C. The product DMT is thus obtained.

Process for purification of DMT by film crystallization

Growing community of inventors

Tianjin, China

Jun Zhang