Abstract: The present disclosure provides a signal communication terminal and a signal communication system. The signal communication terminal includes at least a set of signal enhancement branches and a routing circuit connected with each of the signal enhancement branches. The signal enhancement branch includes a first antenna, a second antenna, a first switching circuit, a second switching circuit, and a first signal processing circuit, where the first switching circuit is connected with each of the first antenna and the first signal processing circuit, the second switching circuit is connected with each of the first signal processing circuit and the routing circuit, and the first signal processing circuit is connected with the second antenna, so as to solve the existing technical problem that the speed of the broadband network of the device for converting the mobile network to the broadband network will be greatly decreased when the mobile signal is weak.

Abstract: As described below, the present invention features compositions and methods for neuroprotection and/or neuroregeneration of damaged or degenerating neurons. In various embodiments, the compositions and methods of the present disclosure are used to treat a neurodegenerative disease and/or nervous system injury. The methods in various embodiments include reducing or eliminating activity or expression of a target gene(s) and/or a polypeptide(s) expressed by a target gene(s) in a neuron.

Abstract: A time-sharing detection control circuit connected to a plurality of amplification links, includes: a control module to sequentially output a number of switching control signals at preset intervals; a detection module electrically connected to the control module, and a change-over switch. The detection module converts output signals from the amplification links into detection signals and output the detection signals to the control module. The change-over switch is connected to the control module, the detection module and each of the amplification links, and sequentially selects one of the amplification links to be connected to the detection module at preset intervals under control of the switching control signals so as to enable the output signals from the one of the amplification links to be inputted into the detection module.

Abstract: A time-sharing detection control circuit connected to a plurality of amplification links, includes: a control module to sequentially output a number of switching control signals at preset intervals; a detection module electrically connected to the control module, and a change-over switch. The detection module converts output signals from the amplification links into detection signals and output the detection signals to the control module. The change-over switch is connected to the control module, the detection module and each of the amplification links, and sequentially selects one of the amplification links to be connected to the detection module at preset intervals under control of the switching control signals so as to enable the output signals from the one of the amplification links to be inputted into the detection module.

Abstract: Provided is a use of one or more MicroRNA genes selected from miRNAs of Family Let-7, miR-21 or miR-222 in the construction of tissue engineered nerves and in the repair of peripheral nerve defects. An outer and/or internal surface or pores of a tissue engineered nerve graft are coated or adsorbed with polymeric nanomicrospheres carrying a Let-7 family miRNA inhibitor, miR-21, or miR-222, or a mimetic thereof, wherein the polymeric material is composed of biocompatible fibronectin and heparin. The regeneration of peripheral nerves and the construction of tissue engineered nerves are promoted by regulating the expression of MicroRNA genes which can effectively promote the proliferation of primary Schwann cells cultured in vitro and have an anti-apoptotic effect on neuronal cells. In-vivo test proves that bridging of the tissue engineered nerve graft can facilitate the regeneration of peripheral nerves, thus being useful in the treatment of peripheral nerve injury.

Abstract: Disclosed in the present application is a copper rotation-suspension smelting process comprising: mixing a flux and/or fume with dried copper-containing mineral powders to form a mixed material, which enters into a smelting furnace through a material channel; allowing a reaction gas to form a swirling flow under an action of a swirler, which enters into the smelting furnace through a Venturi channel under a guidance of a swirling gas channel; replenishing the reaction gas and/or a fuel to the smelting furnace through an auxiliary oxygen channel and an auxiliary fuel channel; subjecting the swirling flow which has been subjected to high-speed expansion through the Venturi channel and enters into the smelting furnace to a contact reaction with the mixed material; separating a melt generated by the reaction which falls into a settling tank into a residue layer and a copper-containing product layer.

Abstract: Provided is a use of one or more MicroRNA genes selected from miRNAs of Family Let-7, miR-21 or miR-222 in the construction of tissue engineered nerves and in the repair of peripheral nerve defects. An outer and/or internal surface or pores of a tissue engineered nerve graft are coated or adsorbed with polymeric nanomicrospheres carrying a Let-7 family miRNA inhibitor, miR-21, or miR-222, or a mimetic thereof, wherein the polymeric material is composed of biocompatible fibronectin and heparin. The regeneration of peripheral nerves and the construction of tissue engineered nerves are promoted by regulating the expression of MicroRNA genes which can effectively promote the proliferation of primary Schwann cells cultured in vitro and have an anti-apoptotic effect on neuronal cells. In-vivo test proves that bridging of the tissue engineered nerve graft can facilitate the regeneration of peripheral nerves, thus being useful in the treatment of peripheral nerve injury.

Abstract: A rotation-suspension smelting method, in which a powdered sulfide concentrate and an oxygen-containing gas are sprayed into a high-temperature reaction tower. The oxygen-containing gas is divided into two parts: the second oxygen-containing gas is sprayed in the form of an annular direct flow into the reaction tower and forms a bell-shaped wind curtain; and the first oxygen-containing gas is transformed into a rotation-jet and jetted into the center of the wind curtain. In the space between the gas flows, the concentrate entering in a direction deviated towards the center is drawn in the rotation-jet, and a high-temperature off-gas is sucked in, forming a gas-particle mixed two-phase rotation-jet. The sulfide concentrate is ignited, at the same time, a melt containing matte (or metal) and slag is formed; and the matte (or metal) is separated from the slag at the bottom of the reaction tower, completing the metallurgical process.

Abstract: The present invention provides a process for extracting noble metals from anode slime, comprising: mixing sodium carbonate, quartz and coke powder and impurity-removed anode slime, and subjecting the mixture to smelting and converting to obtain alloys of noble metals. The present invention avoids problem of lead pollution by using metallic bismuth to collect noble metals; meanwhile, metallic bismuth has low melting point, high specific gravity, and formation heat of bismuth oxide of 45.6 kcal/g atomic oxygen, thus it is easy to be reduced and the reduction temperature is low, which are beneficial for saving energy consumption and reduction time; the much smaller amounts of copper, nickel, antimony and arsenic entering noble bismuth in a slightly reductive smelting atmosphere than those entering noble lead make the converting of noble bismuth become simple, thereby decreasing smelting time and increasing the direct recovery rate of noble metals in anode slime.

Abstract: The invention discloses a parallel jet electrolytic process, wherein an electrolyte after being pressurized is jetted in parallel from a position at the bottom and near a surface of a cathode at a rate of 0.5-2.5 m/s into a gap between the cathode and an anode. During the production process, the pressurized electrolyte is jetted in parallel along the surface of the cathode, and the electrolyte flows from bottom to top at the cathode side and moves from top to bottom at the anode side simultaneously, which thus achieves a side cutting function on the cathode and the anode; and the side cutting flow of the electrolyte from top to bottom at the anode is able to greatly increase the settling rate of the anode slime and avoid its adhesion to the anode to form an anode slime layer. The invention also provides a parallel jet electrolytic device.

Abstract: Provided herein is a method for smelting high-arsenic copper sulfide concentrate, which comprises the steps of: mixing the high-arsenic copper sulfide concentrate with quartz sand and CaO-containing material to obtain a mixed material; mixing the mixed material with oxygen-containing reactant gas and heating for reaction to obtain matte, slag and SO2-containing flue gas. By the addition of CaO and SiO2 in the smelting process, the concentrate material, the CaO and the SiO2 are allowed to react in the furnace under high temperature. The arsenic sulfides in the concentrate are oxidized first and then chemically react with slagging flux CaO to enter the slag phase in the form of calcium-based compounds of arsenic, iron arsenates and etc., thus reducing the arsenic content in the copper matte.

Abstract: Disclosed in the present application is a copper rotation-suspension smelting process comprising: mixing a flux and/or fume with dried copper-containing mineral powders to form a mixed material, which enters into a smelting furnace through a material channel; allowing a reaction gas to form a swirling flow under an action of a swirler, which enters into the smelting furnace through a Venturi channel under a guidance of a swirling gas channel; replenishing the reaction gas and/or a fuel to the smelting furnace through an auxiliary oxygen channel and an auxiliary fuel channel; subjecting the swirling flow which has been subjected to high-speed expansion through the Venturi channel and enters into the smelting furnace to a contact reaction with the mixed material; separating a melt generated by the reaction which falls into a settling tank into a residue layer and a copper-containing product layer.

Abstract: A method and device for depleting copper smelting slag. The method comprises mixing copper smelting molten slag (1) with a reductant (2) and an inert gas (3) under pressure, and then depleting same. The device for depletion comprises a furnace body (4), which furnace body (4) is provided with a feed opening (413) and a slag discharge port (416), and gas nozzles (411) disposed on the side wall of the furnace body.

Abstract: A method and device for producing a crude copper. The method comprises: mixing and reacting copper smelting molten slag (1), a carbon-containing reductant (2) and an inert gas (3) under pressure, the pressure of the inert gas (3) being 100 kPa to 800 kPa. The device comprises: a furnace body (4) and gas nozzles (411) disposed on the furnace body (4), the gas nozzles (411) being located on the sidewall of the furnace body (4) and connected to the center of the molten pool.

Abstract: The present invention provides a process for extracting noble metals from anode slime, comprising: mixing sodium carbonate, quartz and coke powder and impurity-removed anode slime, and subjecting the mixture to smelting and converting to obtain alloys of noble metals. The present invention avoids problem of lead pollution by using metallic bismuth to collect noble metals; meanwhile, metallic bismuth has low melting point, high specific gravity, and formation heat of bismuth oxide of 45.6 kcal/g atomic oxygen, thus it is easy to be reduced and the reduction temperature is low, which are beneficial for saving energy consumption and reduction time; the much smaller amounts of copper, nickel, antimony and arsenic entering noble bismuth in a slightly reductive smelting atmosphere than those entering noble lead make the converting of noble bismuth become simple, thereby decreasing smelting time and increasing the direct recovery rate of noble metals in anode slime.

Abstract: The invention discloses a parallel jet electrolytic process, wherein an electrolyte after being pressurized is jetted in parallel from a position at the bottom and near a surface of a cathode at a rate of 0.5-2.5 m/s into a gap between the cathode and an anode. During the production process, the pressurized electrolyte is jetted in parallel along the surface of the cathode, and the electrolyte flows from bottom to top at the cathode side and moves from top to bottom at the anode side simultaneously, which thus achieves a side cutting function on the cathode and the anode; and the side cutting flow of the electrolyte from top to bottom at the anode is able to greatly increase the settling rate of the anode slime and avoid its adhesion to the anode to form an anode slime layer. The invention also provides a parallel jet electrolytic device.

Abstract: The invention provides a rotation-suspension smelting method, in which a powdered sulfide concentrate and an oxygen-containing gas are sprayed into a space within a high-temperature reaction tower through an equipment. The oxygen-containing gas is divided into two parts before entering the equipment: the second oxygen-containing gas is sprayed in the form of an annular direct flow into the reaction tower and forms a bell-shaped wind curtain; and the first oxygen-containing gas is transformed into a rotation-jet via the equipment and jetted into the center of the wind curtain. In the annular space between the two gas flows, the concentrate entering in a direction deviated towards the center is drawn in the rotation-jet, and a high-temperature off-gas from the bottom of the reaction tower is also sucked in, forming a gas-particle mixed two-phase rotation-jet.

Abstract: A method and device for producing a crude copper. The method comprises: mixing and reacting copper smelting molten slag (1), a carbon-containing reductant (2) and an inert gas (3) under pressure, the pressure of the inert gas (3) being 100 kPa to 800 kPa. The device comprises: a furnace body (4) and gas nozzles (411) disposed on the furnace body (4), the gas nozzles (411) being located on the sidewall of the furnace body (4) and connected to the center of the molten pool.

Abstract: A method and device for depleting copper smelting slag. The method comprises mixing copper smelting molten slag (1) with a reductant (2) and an inert gas (3) under pressure, and then depleting same. The device for depletion comprises a furnace body (4), which furnace body (4) is provided with a feed opening (413) and a slag discharge port (416), and gas nozzles (411) disposed on the side wall of the furnace body.

Abstract: The present invention provides a process for recovering valuable metals from precious metal smelting slag, comprising: smelting the precious metal smelting slag and a flux in a top-blown rotary furnace to produce a lead-bismuth alloy, wherein the precious metal smelting slag comprises Au, Ag, Bi and Pb; electrolyzing the lead-bismuth alloy at a current density ranging from 60 to 110 A/m2 to obtain lead cathode and lead anode slime; refining the lead anode slime to produce bismuth and silver-zinc crust, and extracting gold and silver separately from the silver-zinc crust. Through utilizing a top-blown rotary furnace as the smelting apparatus and adjusting the ratio of the flux, the present invention enriches the valuable metals gold, silver, bismuth, lead or the like to lead-bismuth alloy, ensures lower contents of gold, silver, bismuth and lead in the reducing slag and thereby increases the comprehensive recovery rates of gold, silver, bismuth and lead from the precious metal smelting slag.