Abstract: The present invention relates to a nonmetallic unbonded flexible riser for deep-sea mining and a manufacturing method thereof, wherein the riser includes a lining layer, an internal pressure resistant reinforcing layer, a first anti-wear layer, a first compensation reinforcing layer, a second anti-wear layer, a second compensation reinforcing layer, a third anti-wear layer, a framework layer, a isolation layer, a first tensile reinforcing layer, a fourth anti-wear layer, a second tensile reinforcing layer and an outer coating layer which are sequentially arranged from inside to outside, wherein unbonded connection between adjacent layers is adopted. The present invention may ensure the continuous transportation of the mineral and the seawater inside the flexible mixed transportation pipe, adapt to the severe marine environment and loading condition, and ensure the safety of mining work.

Abstract: Provided are a wireless power supply system applied to a refrigerating device, a drawer assembly and the refrigerating device. The wireless power supply system comprises a control module, a display control module, a wireless communication module, a wireless power supply module, a battery module, and a detection module. The wireless power supply module comprises a wireless power supply receiving module and a wireless power supply transmitting module; when the wireless power supply receiving module gets close to the wireless power supply transmitting module so as to achieve electrical connection, the display control module is switched on; when the detection module detects that the wireless power supply receiving module gets away from the wireless power supply transmitting module so as to achieve disconnection, the battery module is discharged to switch on the display control module so as to continuously supply power to the display control module.

Abstract: A process for the production of a hydrocarbon which comprises contacting, in a reactor, methanol and/or dimethyl ether with a catalyst comprising a metal halide, such as a zinc halide, in which the methanol and/or dimethyl ether is contacted with the catalyst in the presence of at least one phosphorus compound having at least one P—H bond.

Abstract: The present invention relates to a new kind of heavy metal chelating agents and a preparation process and uses thereof. The said heavy metal chelating agents are expressed in &agr;-[D(+)glucose-1-yl-amino]-&bgr;3-mercapto-(S)-propanoic acid (abbreviated to NGP,I) and/or N,N′-di[D(+)glucose-1-yl]-L-cystine (abbreviated to NGCD,II). In the process of preparation, glucose and cysteine are reacted with a base, with a reducing agent, and the obtained products are acidified to give NGP,I, which can be used in and/or as drugs, health foods and food additives for accelerating the excretion of heavy metals including Pb, Cd, Hg, Al, Sb, As, etc. The structural feature of the compounds of the present invention is that they contain glucose and cysteirie in their molecules.