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213results about How to "Avoid Compatibility Issues" patented technology

Composite energy system of solar energy, ground source heat pump and chilled water storage

A composite energy system of solar energy, ground source heat pump and chilled water storage comprises an air conditioner, a domestic hot water supply device, one or more device (hereinafter referred to as host) of a solar energy heat-collecting device, a heat storage water tank unit, a cold storage water tank unit and a ground source heat pump system, a ground heat exchanger, an auxiliary heating device, a circulating water pump, a first electric three-way valve, a second electric three-way valve, a first electric two-way valve and a second electric two-way valve, wherein the circulating water pump is communicated with the air conditioner, and the auxiliary heating device is communicated with the domestic hot water supply device. The invention fully utilizes renewable energy sources such as solar energy, geothermal energy and biomass energy to masterly combine the ground source heat pump air-conditioning system with the solar energy hot water system and the chilled water storage system and construct a comprehensive energy system combined by the domestic hot water system, the ground source heat pump, the chilled water storage air-conditioning system and the like; and the invention is completely combined with the entire building so as to greatest reduce the floor space and the investment and increase the energy efficiency and economic performance of the system.
Owner:TONGJI UNIV

Biodegradable mulch film capable of weeding

The invention discloses a biodegradable mulch film capable of weeding. The mulch film is prepared from a first melt and a second melt according to multi-layer coextrusion and multi-layer coblowing ormulti-layer casting and biaxial stretching manners; the preparation process of the first melt is as follows: performing mixing extrusion on first resin, second resin, a compound stabilizer, an antiblocking agent and an interface compatibilizer in a screw extruder; and the preparation process of the second melt is as follows: firstly performing in-situ extrusion on weeding layer resin through a screw extruder, and directly performing mixing extrusion on the obtained resin, first resin, second resin, a chemical stabilizer, an interfacial compatibilizer and a composite inorganic salt buffering agent in a threaded rod. The biodegradable mulch film capable of weeding provided by the invention can make herbicide micro particles released in balance with degradation of the mulch film, and improvesa durable effect of a herbicide; and in addition, through a resin in-situ reaction in the processing process, the weather resistance and biological degradability of the mulch film are balanced, controlled degradation of the mulch film is realized, and the mulch film provided by the invention has obvious advantages compared with a traditional mulch film.
Owner:ZHEJIANG UNIV

Energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device

Disclosed in the invention is an energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device. The invention relates to a piezoelectric-electromagnetic composite energy harvesting device capable of improving an output power, which belongs to the technical field of the new energy and power generation. The piezoelectric-electromagnetic composite energy harvesting device comprises a piezoelectric-electromagnetic composite energy harvesting device body and an energy collection circuit. The piezoelectric-electromagnetic composite energy harvesting device body consists of a housing, a coil, an upper permanent magnet, a piezoelectric ceramic material, a foundation beam, a tapered permanent magnet, a lower permanent magnet, an upper electrode, a piezoelectric plate, a lower electrode, a left piezoelectric plate upper electrode lead, a right piezoelectric plate upper electrode lead. The energy collection circuit includes an electromagnetic energy harvesting device energy collection circuit, a piezoelectric energy harvesting device energy collection circuit, and a charging circuit for realizing composite charging and preventing current returning. According to the invention, conversion from an alternating current to a direct current is realized; the output power supply is improved for a load. The energy harvesting device has advantages of green and pollution-free effects, high energy density, shortened charging time, high reliability, high environment adaptability, convenient operation control, and low maintenance cost and the like.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Graphene-containing water-borne epoxy resin emulsion and preparation method thereof

The invention discloses graphene-containing water-borne epoxy resin emulsion and a preparation method thereof. The preparation method comprises the specific preparation steps: preparing a polyethyleneglycol/graphene composite material, preparing a water-borne epoxy resin emulsifying agent and preparing water-borne epoxy resin emulsion, wherein the polyethylene glycol/graphene composite material is prepared by an in-situ polymerization method, so that graphene can be uniformly dispersed and anchored in a polyethylene glycol matrix; when the emulsifying agent is prepared, hydroxyl radicals on the surface of polyethylene glycol react with epoxy resin under the action of a catalyst, so that the connection among polyethylene glycol, the graphene and the epoxy resin is realized; in the preparation process of the emulsion, the graphene enters the emulsion along with the emulsifying agent, so that the problems of difficult dispersion and poor compatibility and the like of the graphene in theemulsion are solved and the graphene-containing water-borne epoxy resin emulsion with uniform dispersion is obtained. The graphene-containing water-borne epoxy resin emulsion prepared by the inventionhas good centrifugation, dilution and storage stability, is lower in cost compared with that of the traditional epoxy resin, and is safe, environmentally friendly and free from toxicity; and when thegraphene-containing water-borne epoxy resin emulsion is applied in anti-corrosive coatings, the anti-corrosive property and the adhesive force are stronger, the impact resistance is good and the construction is easy.
Owner:XIAMEN KNANO GRAPHENE TECH CORP

Remote mobile phone test system and method base on bus interception and video acquisition

The invention relates to a remote mobile phone test system based on bus interception and video acquisition. The system comprises a video acquisition device, a test device, a network server and a remote work station, wherein the video acquisition device is used for acquiring the video of the screen of a mobile phone to be tested; the test device is used for acquiring other external bus interface signals besides the screen by a mode of bus interception and receiving control signals from a remote work station; the network server is used for connecting the video acquisition device and the test device with the remote work station through the Internet; and the remote work station is used for simulating the mobile phone to be tested according to the bus interface signals, carrying out operationsthrough the mobile phone to be tested and screen video, and producing control signals transmitted to the test device via the network server. The invention also relates to a method corresponding to the remote mobile phone test system based on bus interception. The technical proposal can conveniently realize a remote mobile phone test through acquiring the external bus interface signals of the mobile phone to be tested, making use of the remote video acquisition of the screen, and carrying out signal transmission through the Internet.
Owner:余纯龙

Reinforcing and toughening polylactic acid material and preparation method thereof

The invention provides a reinforcing and toughening polylactic acid material and a preparation method thereof, and relates to the field of polymer materials. The preparation method comprises the steps of mixing layered double hydroxides with epsilon-caprolactone and obtaining reactants, and after a ring opening polymerization, obtaining polycaprolactone modifier; conducting addition polymerization on the polycaprolactone modifier and diisocyanate, and obtaining prepolymer; making the prepolymer react with chain extender, and obtaining polyurethane modifier; melting and mixing the polyurethane modifier and polylactic acid, and obtaining the reinforcing and toughening polylactic acid material. Flexible chain segments of the polyurethane modifier improve the elasticity and flexibility of the material, rigid chain segments of the polyurethane modifier improve the strength and heat resistance of the material, and finally the overall mechanical property of the material is improved. Since the layered double hydroxides with a laminated structure are dispersed in a base material, the bending strength and stretching strength of the material are improved, and the anchoring effect of the material can avoid the modifier compatibility and migration problem which is easily generated from simple physical blending.
Owner:HUNAN UNIV OF TECH

High-barrier high-strength ultrathin full-biodegradable mulching film and preparation method

ActiveCN110452507AMoisture retention performance improvedLower production and shipping costsClimate change adaptationPlant protective coveringsBicarbonateUrea
The invention provides a high-barrier high-strength ultrathin full-biodegradable mulching film and a preparation method. The mulching film is prepared from polyadipic acid-butylene terephthalate as amain body material, and is prepared from the following components in parts by weight: 60-99.7 parts of the main body material, 0.1-30 parts of a barrier property enhancing agent, 0.1-3 parts of a tearing resistance enhancing agent, 0.1-5 parts of a lubricant, 0-2 parts of a light stabilizer, 0-2 parts of an antioxidant and 0-5 parts of a color master batch, wherein the tearing resistance enhancingagent is selected from one or more of polyphosphates, diisopropylbenzene peroxide, an ADR chain extender, KH560, KH570, urea, carbonate, bicarbonate, ammonium salt, an organic amine compound, anhydride and calcium stearate; and the barrier property enhancing agent is an organic barrier property enhancing agent, an inorganic barrier property enhancing agent or a compound of the organic barrier property enhancing agent and the inorganic barrier property enhancing agent. The full-biodegradable agricultural mulching film provided by the invention achieves high tearing strength and high barrier performance with low cost, has the value of large-scale popularization and has great marketization significances.
Owner:INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI

Nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid fibers and preparation method thereof

The invention provides nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid fibers and a preparation method thereof. The preparation method of the nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid fibers is characterized by comprising the steps that 1, a nitrogen-phosphorus synergetic flame retardant monomer (FR) is prepared; 2, under a vacuum or inert atmosphere, Sn(Oct)2 serves as a catalyst, the nitrogen-phosphorus synergetic flame retardant monomer (FR) and lactide (LA) are subjected to a ring opening copolymerization reaction at the temperature of 130-170 DEG C, and nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid (FR-PLA) is obtained; 3, nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid is subjected to vacuum drying, the moisture content of the nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid is made to be smaller than or equal to 80 ppm, melt spinning forming is conducted at the temperature of 200-240 DEG C, and the nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid fibers are obtained. According to the nitrogen-phosphorus synergetic copolymerization flame retardant polylactic acid fibers and the preparation method thereof, a copolymerization method is adopted to prepare the flame retardant PLA, the problems that compatibility between fire retardant and a base body is poor, the fire retardant is migrated and precipitated, and thermal stability in multiple times of melting machining is poor are effectively avoided, and the obtained flame retardant PLA has excellent spinnability and mechanical properties simultaneously.
Owner:DONGHUA UNIV

Urethra valve driven by wireless power shape memory alloy (SMA)

InactiveCN106540372AAvoid closing failureLong term workMedical devicesValvesResonanceMedicine
The embodiment of the invention discloses a urethra valve driven by a wireless power shape memory alloy (SMA). The SMA is short for a shape memory alloy. The urethra valve is used for solving the technical problems that in the prior art, urinary incontinence, caused by urethra sphincter disfunction, of a patient cannot be solved effectively by a conservative treatment, an operative treatment, nursing measures and the like. The urethra valve comprises a magnetic coupling resonance unit, an SMA spring, a valve element, a first permanent magnet, a second permanent magnet and a valve body. The valve body is of a hollow frame-shaped structure; the SMA spring, the valve element, the first permanent magnet and the second permanent magnet are arranged in a valve cavity of the valve body; and the valve body is used for being fixed on a pubis position of a human body. One end of the SMA spring is connected with the valve element, and the other end of the SMA spring is fixedly connected with the inner wall of one side of the valve cavity; the first permanent magnet adjoins the side, unconnected with the SMA spring, of the valve element; one side of the second permanent magnet adjoins the inner wall of the other side of the valve cavity and the other side of the valve cavity is opposite to the side connected with the SMA spring; and the gap between the first permanent magnet and the second permanent magnet is used for penetrating through a urethra position of the human body.
Owner:GUANGDONG UNIV OF TECH

Method for transmitting paired master cryptography keys in wireless local area network (WLAN) access network and system

The invention discloses a method for transmitting paired master cryptography keys in a wireless local area network (WLAN) access network. The method includes the steps: an access key negotiation point receives an access authentication message sent by an access client, expands notice information in the access authentication message, and sends the expanded access authentication message to an access authentication point; the access authentication point sends an access request message with identification information of the access client to an authentication server-side; after an authentication success message is received, a main master cryptography key is obtained from the authentication success message, the main master cryptography key is encrypted according to the notice message, and an obtained encrypted message is packaged in the authentication success message to be sent to the access client. The invention further provides a corresponding system. Due to the fact that the scheme is adopted, the problems that networking compatibility is poor and an interface is complex and the like due to the fact that the access authentication point sends the paired master cryptography keys to a secret key negotiation point are avoided.
Owner:ZTE CORP
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