Abstract: A direct-current energy-consuming apparatus, a method and a device for controlling a direct-current energy-consuming apparatus, and a storage medium are provided. The direct-current energy-consuming apparatus includes an energy-consuming resistor, a power module, an inductor and a control module. The inductor is arranged in a branch formed by the energy-consuming resistor and the power module connected in series. The control module is configured to switch off the power module when it is detected that a voltage between two ends of the direct-current energy-consuming apparatus is greater than a first voltage threshold, and switch on the power module, when it is detected that a voltage between two ends of the direct-current energy-consuming apparatus is less than a second voltage threshold, where the two voltage thresholds are determined based on a rated voltage of a corresponding direct-current power transmission system.

Abstract: The present disclosure provides a biomass-based fiber composite material and a preparation method therefor and use thereof. In the present disclosure, cypress is treated to extract the fibers therein, cypress stems are treated by high-temperature pyrolysis reaction in a gasification furnace to obtain a silicon-carbon material. The extracted fibers are mixed with a silicon-carbon material by a surface coating method, and then dried, compacted, cured and woven into precursors, which are then woven into cloth. The cloth is then molded into the required product in the corresponding size according to the performance requirements of different products. The present disclosure makes full use of the high strength, moisture absorption and dehumidification, heat insulation, sound insulation and other properties of cypress fibers; combines the cypress fibers with the silicon-carbon material made from cypress stems to mix, dry and press them.

Abstract: The present invention relates to the technical field of automobile fittings, and discloses a foldable and flexible vent for an air conditioner, comprising a base, a hose and an air guide cylinder, wherein one end of the base communicates with the vent for the air conditioner, and the other end communicates with the hose; the air guide cylinder is arranged at one end of the hose away from the base; the vent further comprises an air damper and a rotating mechanism. The plurality of air dampers are distributed in a circular array in the air guide cylinder with the axis thereof as the center, and then adjusted by the synchronous angle of the rotating mechanism, so that the wind direction of the hose flowing into the air guide cylinder is uniformly discharged in a spiral manner, achieving the effect of simple, convenient and efficient uniform venting.

Abstract: Embodiments of the present disclosure provide an acquisition temperature circuit, method, and device, a storage medium, and a charging and power distribution system assembly. The acquisition temperature circuit includes a main control board and a power board provided with a first thermistor, a second thermistor, and an optocoupler isolation circuit. The first thermistor is connected to the optocoupler isolation circuit, the optocoupler isolation circuit is connected to the main control board, and the second thermistor is connected to the main control board. In the technical solutions provided by the embodiments of the present disclosure, two thermistors are provided on the power board of the charging and power distribution system assembly, avoiding temperature measurement errors caused by over-range of the thermistor located on the power board, improving the accuracy of temperature acquisition of the charging and power distribution system assembly, and thus improving the charging safety of the power battery.

Abstract: The present invention provides a preparation method of natural bamboo fiber composites and an application thereof. The method involves treating bamboo with a specific composition of treatment solution to obtain natural bamboo fibers with a length and a diameter that meets certain conditions; then, the natural bamboo fibers are combined with polypropylene fibers to prepare composites, and by controlling process conditions of a preparation process, a high-strength and excellent comprehensive performance composites is finally prepared. The composites produced by the method can be used as a bottom baffle of the air conditioning box in automobiles. Through the method, a high-performance natural bamboo fiber composites are provided.

Abstract: The invention relates to the technical field of automobile accessories, and discloses a semi-automatic telescopic automobile air conditioner air outlet, comprising an instrument panel body, and further comprising an adjustment mechanism and a damper assembly; the adjustment mechanism is provided on the instrument panel body, one end thereof is in communication with the automobile air conditioner air outlet, and the other end thereof may adjust the distance along a straight line and selectively lock the adjustment position thereof, for guiding the wind direction of the automobile air conditioner and adjusting the distance between the air outlet thereof and the instrument panel body; and the damper assembly is provided at one end of the adjustment mechanism away from the automobile air conditioner air outlet, for performing secondary adjustment and guiding on the wind direction of the adjustment mechanism.

Abstract: The invention describes a coated seed comprising: a seed and a coating on the seed wherein the coating comprises a bioadhesive and one or more bioactive agents; wherein the bioadhesive comprises one or more protein-containing biomaterials, an inorganic filler, and a defoamer; and wherein the one or more bioactive agents are selected from a biorepellent, a pesticide, a fertilizer, or a bactericide. The bioactive agent as used in the invention may be frass. The invention also describes a resin comprising a bioadhesive and one or more bioactive agents and a kit comprising a bioadhesive and one or more bioactive agents which can be used in seed coating.

Abstract: Method for determining parameter of a passive impedance adapter applicable to VSC-HVDC, including: S1. obtaining VSC-HVDC impedance and VSC-HVDC impedance curve X(f) based on VSC-HVDC impedance; S2. estimating upper limit value of the main capacitor in the passive impedance adapter; S3. calculating adapter parameter curve Xadapter(f); S4. determining value of the main capacitor and varying value of the main resistor until min[X(f)?Xadapter(f)] is maximized; determining whether min[X(f)?Xadapter(f)]>k holds; S5. If min[X(f)?Xadapter(f)]>k does not hold, increasing the value of the main capacitor and performing steps S2-S4 until min[X(f)?Xadapter(f)]>k holds when the value of the main capacitor is within the range of the value of the main capacitor, storing the parameters in an available parameter set; S6. reducing the value of the main capacitor, and storing the parameters when min[X(f)?Xadapter(f)]>k holds in the available parameter set; S7.

Abstract: A method and a system for determining a direct current (DC) loop impedance are provided. The method includes: establishing an impedance model for a DC loop of a high-voltage direct current (HVDC) system; scanning parameters in the HVDC system based on the impedance model, to obtain a feasible region of each of the parameters; substituting, for each of the parameters, the parameter in the feasible region into a DC loop impedance equation, to obtain an impedance corresponding to the parameter, the DC loop impedance equation being obtained by transforming the impedance model; and comparing, for each of the parameters, the impedance corresponding to the parameter with a target impedance value, and determining the impedance that meets the target impedance value and the parameter corresponding to the impedance as an optimal impedance and an optimal parameter of the DC loop.

Abstract: The present disclosure provides a parameter design method for a series passive impedance adapter applicable to a VSC-HVDC transmission system, to resolve the technical problem that high-frequency resonance may occur when impedance of a VSC-HVDC transmission system is mismatched with that of a sending-end or receiving-end grid. A parameter design goal of the present disclosure is that reactive power consumed by a series passive impedance adapter is not more than A times rated power of a converter, and a loss of the series passive impedance adapter in a fundamental wave is B times the rated power of the converter. The parameter design method for a series passive impedance adapter applicable to a VSC-HVDC transmission system in the present disclosure can realize a positive impedance characteristic within a concerned frequency band and completely eliminate a risk of harmonic resonance.

Abstract: The present disclosure provides a parameter design method for a series passive impedance adapter applicable to a VSC-HVDC transmission system, to resolve the technical problem that high-frequency resonance may occur when impedance of a VSC-HVDC transmission system is mismatched with that of a sending-end or receiving-end grid. A parameter design goal of the present disclosure is that reactive power consumed by a series passive impedance adapter is not more than A times rated power of a converter, and a loss of the series passive impedance adapter in a fundamental wave is B times the rated power of the converter. The parameter design method for a series passive impedance adapter applicable to a VSC-HVDC transmission system in the present disclosure can realize a positive impedance characteristic within a concerned frequency band and completely eliminate a risk of harmonic resonance.

Abstract: A method and a device for controlling grid configuration of a flexible direct current electric power transmission system, and a computer-readable storage medium are provided. The active power reference value is modified based on the frequency deviation of the alternating current grid. The reactive power reference value is modified based on the voltage deviation of the alternating current grid. The outputted active power and the outputted reactive power are controlled based on the active power reference value and the reactive power reference value, respectively. The grid voltage is further configured and controlled through power control, so that the system is capable of self-synchronization, frequency regulation and voltage regulation. In addition, the virtual synchronous machine technology is introduced into control of the reactive power, so that the system can provide inertia support for the grid voltage amplitude.

Abstract: The invention relates to the technical field of automobile accessories, and discloses a semi-automatic telescopic automobile air conditioner air outlet, comprising an instrument panel body, and further comprising an adjustment mechanism and a damper assembly; the adjustment mechanism is provided on the instrument panel body, one end thereof is in communication with the automobile air conditioner air outlet, and the other end thereof may adjust the distance along a straight line and selectively lock the adjustment position thereof, for guiding the wind direction of the automobile air conditioner and adjusting the distance between the air outlet thereof and the instrument panel body; and the damper assembly is provided at one end of the adjustment mechanism away from the automobile air conditioner air outlet, for performing secondary adjustment and guiding on the wind direction of the adjustment mechanism.

Abstract: The present invention relates to the technical field of automobile fittings, and discloses a foldable and flexible vent for an air conditioner, comprising a base, a hose and an air guide cylinder, wherein one end of the base communicates with the vent for the air conditioner, and the other end communicates with the hose; the air guide cylinder is arranged at one end of the hose away from the base; the vent further comprises an air damper and a rotating mechanism. The plurality of air dampers are distributed in a circular array in the air guide cylinder with the axis thereof as the center, and then adjusted by the synchronous angle of the rotating mechanism, so that the wind direction of the hose flowing into the air guide cylinder is uniformly discharged in a spiral manner, achieving the effect of simple, convenient and efficient uniform venting.

Abstract: Method for determining parameter of a passive impedance adapter applicable to VSC-HVDC, including: S1. obtaining VSC-HVDC impedance and VSC-HVDC impedance curve X(f) based on VSC-HVDC impedance; S2. estimating upper limit value of the main capacitor in the passive impedance adapter; S3. calculating adapter parameter curve Xadapter(f); S4. determining value of the main capacitor and varying value of the main resistor until min[X(f)?Xadapter(f)] is maximized; determining whether min[X(f)?Xadapter(f)]>k holds; S5. If min[X(f)?Xadapter(f)]>k does not hold, increasing the value of the main capacitor and performing steps S2-S4 until min[X(f)?Xadapter(f)]>k holds when the value of the main capacitor is within the range of the value of the main capacitor, storing the parameters in an available parameter set; S6. reducing the value of the main capacitor, and storing the parameters when min[X(f)?Xadapter(f)]>k holds in the available parameter set; S7.

Abstract: An algal bio-adhesive comprising algae mass, a crosslinking agent and an inorganic filler.

Abstract: Distiller's Grain (DG) based bio-adhesives consisting of DG biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based wood glue for making wood panels. Algal bio-adhesives consisting of algal biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based glue for making wood panels. Processes for preparing such DG based bio-adhesives and algal bio-adhesives are provided, comprising the steps of: combining DG biomass or algal material with a cross-linking agent and inorganic fillers to form a blend; micronization or homogenization of the blend to obtain powdery material; and mixing the powdery material with additional water to form a bio-adhesive.

Abstract: A bio-composite material comprises protein-containing non-wood fibrous biomass comprising at least 6 wt % protein, and a cross-linking agent. The bio-composite material may optionally further contain wood biomass, or non-protein-containing non-wood biomass, and is formable into a bio-composite board to replace wood-based boards for a variety of applications. A bioplastic material comprises a bioadhesive, fibrous biomass and a plastic material, and is formable into a variety of products, such as a cup, using conventional plastic processing techniques. Suitable fibrous biomass may include used coffee grounds and a variety of other biomass. A method of forming a board from a bio-composite material, and a method of manufacturing a bioplastic are also provided.

Abstract: The present invention relates to a cross-linked sodium hyaluronate gel for tissue filler for plastic surgery and the preparation method thereof. The alkaline solution of sodium hyaluronate reacts with the long chain alkane containing epoxy group and the cross-linking agent containing epoxy group for 2˜5 hours at 35° C.˜50° C. to produce cross-linked sodium hyaluronate, then washed, gelled and sterilized, to prepare the gel. Among which, the molar ratio of sodium hyaluronate:cross-linking agent containing epoxy group:long chain alkane containing epoxy group is 10:4˜1:1˜4; the number of carbon atoms of the said long chain alkane containing epoxy group is 6 to 18. The gel prepared in the present invention can, on one hand, effectively enhance the resistance to enzymolysis to become more stable, and on the other hand, maintain the excellent biocompatibility of sodium hyaluronate without affecting its injectability.

Abstract: Distiller's Grain (DG) based bio-adhesives consisting of DG biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based wood glue for making wood panels. Algal bio-adhesives consisting of algal biomass, crosslinking agents, and fillers are described as substitutes for formaldehyde based glue for making wood panels. Processes for preparing such DG based bio-adhesives and algal bio-adhesives are provided, comprising the steps of: combining DG biomass or algal material with a cross-linking agent and inorganic fillers to form a blend; micronisation or homogenisation of the blend to obtain powdery material; and mixing the powdery material with additional water to form a bio-adhesive.