Kehuangda (guangzhou) Trading Co., Ltd.

South China Normal University

Foshan Longsee Biomedical Co., Ltd.

Guangdong Longsee Biomedical Co., Ltd.

Csg Power Generation Co., Ltd. Maint. and Test Co.

Tao Chen

Qing Li

Yu Gong

Mingxuan Yang

Yaxiong Yu

Xiaobo Qiu

Jialiang Yu

Yequan Liang

Bo Yan

Fengxi Yu

Zhao Zhang

Shizhou Deng

A device and method for starting a pumped storage group, and a pumped storage system are disclosed. The device includes: an acquisition module configured to acquire starting data of the group in real time; a first determination module configured to determine a real-time speed versus time curve for the group based on the starting data; and a correction module configured to correct a starting speed of the group based on a deviation between a reference speed versus time curve cluster and the real-time speed versus time curve. The real-time speed of the group during starting is visualized through a curve fitting procedure to form the real-time speed versus time curve, the real-time speed versus time curve is compared with a favorable history operation curve, and the deviation between the real-time speed versus time curve and the favorable history operation curve is corrected to adjust the starting speed of the group.

Device and method for starting pumped storage group and pumped storage system

Saliva collector

Watch winder

A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials FeOand &#x3b3;-FeO; said modifier comprises ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid trisodium salt (NTA), (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

Magnetic soil remediation agent for soil heavy metal pollution, preparation method and use thereof

Winder for watch

Watch case

Growing community of inventors

Guangzhou, China

Tao Chen