Abstract: Disclosed are a recombinant fusion protein derived from an HR region of an S2 protein of SARS-CoV-2 and an application of the recombinant fusion protein. The SARS-CoV-2 recombinant fusion protein is a recombinant fusion protein obtained by linking two membrane fusion-related conserved amino acid sequences HR1 and HR2 of the SARS-CoV-2 membrane protein S2 protein by means of a linking peptide. The recombinant fusion protein can be induced and expressed in Escherichia coli, has high expression quantity, and is easy to purify.

Abstract: A firmware upgrade method of a network storage includes inquiring, by the network storage, about a latest firmware version for the network storage from a firmware upgrade platform through a network, and based on the latest firmware version being inconsistent with a current firmware version of the network storage, downloading, by the network storage, the latest firmware version from the firmware upgrade platform through the network and performing a firmware upgrade based on the latest firmware version.

Abstract: A firmware upgrade method of a network storage includes inquiring, by the network storage, about a latest firmware version for the network storage from a firmware upgrade platform through a network, and based on the latest firmware version being inconsistent with a current firmware version of the network storage, downloading, by the network storage, the latest firmware version from the firmware upgrade platform through the network and performing a firmware upgrade based on the latest firmware version.

Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

Abstract: An ocean energy collection device is provided. The device includes a first friction assembly, a second friction assembly, and a gravity center adjustment assembly disposed in sequence from outside to inside, and a control and energy storage assembly arranged on the gravity center adjustment assembly. The first friction assembly includes a spherical housing, a first electrode layer, and a first friction layer which are disposed in sequence from outside to inside. The second friction assembly includes a tumbler-shaped shell, a second electrode layer, and a second friction layer which are disposed in sequence from inside to outside. The gravity center adjustment assembly is fixed in the tumbler-shaped shell. The first friction assembly and the second friction assembly can realize electrification by friction. The first electrode layer, the second electrode layer, and the gravity center adjustment assembly are connected with the control and energy storage assembly.

Abstract: Provided is a carbon quantum dot having a graphite core and a surface including components, such as compounds derived from formula (I) and halogens, and having a positive charge for antibacterial purposes. Also provided are methods for preparing a carbon quantum dot and a composition containing the same.

Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

Abstract: A flow control switch comprises a base, having a passageway and a chamber; a valve body, placed between said passageway and said chamber; an inner cover, fastened to said base on an upper side thereof and having a central hole; a central pole, attached to said valve body and passing through said inner cover, defining a vertical direction; an outer cover, mounted on said inner cover at an adjustable vertical position; and a switch assembly, having a contact ring which is mounted on said central pole and a conducting surface which is mounted on said outer cover; wherein flow of liquid pushes said central pole upward, causing said switch assembly to establish electrical contact, so that a signal indicating flow of liquid is generated, allowing for application of the flow control switch to various environments.

Abstract: A flow regulator for a water pump, comprising a valve body, a left piston, a right piston, a connecting rod, a spring, and a conduit. The valve body is roughly shaped like a cross, having a passageway in a vertical direction and a left tube and a right tube in a horizontal direction, respectively enclosing a left chamber and a right chamber. The left and right pistons are glidingly movable inside the left and right tubes, respectively, being connected by the connecting rod. The spring is inserted between the right piston and a right cap on the right tube. The conduit is placed inside a side wall of the left tube, transmitting water pressure from the passageway to the left chamber. The control element is by water pressure pushed towards the passageway, narrowing the passageway. This is countered by an elastic force of the spring, so that controlled water flow and pressure are achieved.

Abstract: A flow regulator for a water pump, comprising a valve body, a control element, a tube, a spring, and a connecting pipe. The valve body is roughly shaped like a cross, enclosing a first chamber and a second chamber in a vertical direction and having a passageway in a horizontal direction. The control element is glidingly movable in the vertical direction in the first chamber. The tube is placed in said second chamber. The spring is inserted between the control element and the tube and pushes the control element to perform a vertical movement. The connecting pipe is connected with the first tube, transmitting water pressure from a supply pipe to the first tube. The piston block is pushed inward by the water pressure, narrowing the passageway, while being pressed outward by the elastic force, so that controlled water flow and pressure in the supply pipe are achieved.

Abstract: A flow regulator for a water pump, comprising a valve body, a piston block, a spring, a connecting pipe, and a rod. The valve body is roughly shaped like a cross, having a passageway in a vertical direction and a first tube and a second tube in a horizontal direction. The piston block is glidingly movable in the horizontal direction in the first tube. The spring is disposed in the second tube, having ends that are fastened to inner and outer holding plates. The connecting pipe is connected with the first tube, transmitting water pressure from a supply pipe to the first tube. The rod connects the inner holding plate and the piston block to allow the water pressure and the elastic force to balance each other. The piston block is pushed inward by the water pressure, narrowing the passageway, while being pressed outward by the elastic force, so that controlled water flow and pressure in the supply pipe are achieved.

Abstract: A flow regulator for a water pump, comprising a control valve, mounted on an inlet pipe of a water pump. The control valve further comprises a passageway, a chamber, a conduit, and a control element. The passageway allows water to flow through the inlet pipe. The chamber reaches across the passageway. The conduit connects to an outlet pipe of the water pump and transmits water pressure from there through a top end of the control valve into the chamber. The control element is inserted in the chamber, having two ends, at least one of which has an opening connected with the conduit, so that water pressure is applied inside the control element. The control element is further made of elastic material and thus expanded to a varying degree according to the water pressure, causing an effective width of the passageway and consequently water flow through the water pump to vary. This allows to adjust supply of water, as delivered by the water pump, to demand.

Abstract: A flow regulator for a water pump, comprising a valve body, a piston block, a spring, a connecting pipe, and a rod. The valve body is roughly shaped like a cross, having a passageway in a vertical direction and a first tube and a second tube in a horizontal direction. The piston block is glidingly movable in the horizontal direction in the first tube. The spring is disposed in the second tube, having ends that are fastened to inner and outer holding plates. The connecting pipe is connected with the first tube, transmitting water pressure from a supply pipe to the first tube. The rod connects the inner holding plate and the piston block to allow the water pressure and the elastic force to balance each other. The piston block is pushed inward by the water pressure, narrowing the passageway, while being pressed outward by the elastic force, so that controlled water flow and pressure in the supply pipe are achieved.

Abstract: A flow regulator for a water pump, comprising a valve body, a control element, a tube, a spring, and a connecting pipe. The valve body is roughly shaped like a cross, enclosing a first chamber and a second chamber in a vertical direction and having a passageway in a horizontal direction. The control element is glidingly movable in the vertical direction in the first chamber. The tube is placed in said second chamber. The spring is inserted between the control element and the tube and pushes the control element to perform a vertical movement. The connecting pipe is connected with the first tube, transmitting water pressure from a supply pipe to the first tube. The piston block is pushed inward by the water pressure, narrowing the passageway, while being pressed outward by the elastic force, so that control led water flow and pressure in the supply pipe are achieved.

Abstract: A flow regulator for a water pump, comprising a valve body, a left piston, a right piston, a connecting rod, a spring, and a conduit. The valve body is roughly shaped like a cross, having a passageway in a vertical direction and a left tube and a right tube in a horizontal direction, respectively enclosing a left chamber and a right chamber. The left and right pistons are glidingly movable inside the left and right tubes, respectively, being connected by the connecting rod. The spring is inserted between the right piston and a right cap on the right tube. The conduit is placed inside a side wall of the left tube, transmitting water pressure from the passageway to the left chamber. The control element is by water pressure pushed towards the passageway, narrowing the passageway. This is countered by an elastic force of the spring, so that controlled water flow and pressure are achieved.

Abstract: A flow regulator for a water pump, comprising a control valve. The control valve is mounted on an inlet pipe of a water pump and has a chamber, housing a flat-shaped control plate, the upper part of which forms a piston plate, vertically gliding in an upper chamber. The upper chamber is connected with an outlet pipe. The control valve is exposed to water pressure in the outlet pipe, with the control plate driven downward by the water pressure, countered by two springs at two lateral sides of the control plate. The control plate thus has a varying vertical position according to the water pressure.

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; an entrance to the chamber on the main body; a control element, mounted inside the chamber and glidingly movable therein back and forth; a connecting pipe, conducting the water pressure in the outlet pipe to the chamber; and a spring. The water pressure causes the control element to move within the chamber, resulting in the passageway to be narrowed. The spring counters the water pressure, such that when the water pressure decreases the passageway is widened. Thereby the water pressure controls the flow of water, according to demand, such that start-stop cycles of the water pump are lengthened.

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; an entrance on the main body, conducting the water pressure in the outlet pipe to the chamber; a control element, mounted inside the chamber and glidingly movable therein back and forth; a spring; and an adjustable cover, mounted on the main body and connected to the spring. The water pressure causes the control element to move within the chamber, resulting in the passageway to be narrowed. The spring counters the water pressure, such that when the water pressure decreases the passageway is widened. By varying the position of the adjustable cover, the elastic force of the spring is adjusted.

Abstract: A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passageway for water flowing through the inlet pipe; a chamber inside the main body; a connecting pipe, conducting the water pressure in the outlet pipe through an entrance on the main body to the chamber; and a control element, mounted inside the chamber and glidingly movable therein back and forth. The water pressure causes the control element to move within the chamber, adjusting the width of the passageway and controlling the flow of water through the water pump. This allows to extend start-stop cycles of the pump.