Abstract: A composite biochar for controlling heavy metal pollution and a process for producing the same, in particular enrichment of heavy metals such as arsenic and lead in soil with centipede grass, thereafter centipede grass is sintered with hydroxyapatite, sepiolite and chitosan, and compounded with microorganisms to produce said composite biochar; through the process of the present invention, heavy metals such as arsenic and lead are stably enriched or coated in said composite biochar, significantly reducing the potential hazard of arsenic and lead to the environment, and also providing new developmental ideas for treating heavy metal biomass.

Abstract: A porous biochar for improving heavy pollution and a method for producing the same. Said porous biochar is prepared as follows: arrowhead, which has excellent enrichment of lead, is used to absorb heavy metal lead in polluted water or artificial wetlands, simultaneously absorb heavy metal cadmium, thereafter is dried and treated as a biomass, and then the biomass is calcined in stages with a passivating agent in a high temperature environment, so as to heavy metals such as lead and cadmium be stably coated or enriched in a biochar, which is mixed with Pseudomonas aeruginosa having high resistant, to obtain the porous biochar; the porous biochar has high specific surface area, high porosity and excellent mechanical properties, is very stable under different acid-base environments and oxidizing conditions.

Abstract: The present invention disclosed a method for accessing an intelligent storage device, said intelligent storage device includes a first USB interface, a second USB interface, and a storage unit interface. The intelligent storage device is alternatively configured to be in a PC communication mode or a mobile terminal communication mode according to a connection state of the first USB interface. In the PC communication mode, the intelligent storage device conducts USB data communication with the USB host through the first USB interface, and reads and writes the storage unit through the storage unit interface. In the mobile terminal communication mode, the intelligent storage device conducts USB data communication with the mobile terminal device through a second USB interface, and reads and writes the storage unit through the storage unit interface.

Abstract: The present invention discloses a USB expansion function device. When the USB expansion function device with batteries is connected to a mobile terminal device that needs to be charged, by limiting a charging current through a current limiter, a data communication function of the USB expansion function device connected to the mobile terminal device in a USB host mode is implemented while low power consumption of the batteries inside the USB expansion function device is ensured. Thus, the USB expansion function device with batteries can operate continuously for a long time, and its compatibility with data connection of the mobile terminal device can be improved.

Abstract: A laser processing device and a laser processing method. The laser processing device includes a cutting table, configured to load a workpiece to be processed; a distance-measuring unit, configured to perform distance measurement on the workpiece along a predetermined processing path to obtain three-dimensional processing data of the workpiece; and a laser processing unit, configured to process the workpiece by using laser light according to the three-dimensional processing data.