37results about How to "Good physical isolation" patented technology

The present invention is an imaging system for detecting concealed objects on an individual. The imaging system includes an imaging zone that is illuminated with millimeter wave energy. A plurality of millimeter wave cameras are focused to fully surround the imaging zone and have the ability to detect millimeter wave frequencies reflected from the imaging zone. As an individual passes through the imaging zone the plurality of millimeter wave cameras detect concealed objects by identifying differences in the millimeter wave energy reflected by the individual's body and a concealed object. A composite image is generated by a central processing unit and displayed on a monitor showing the concealed object on the individual through optical contrast.

A cooling die, for use in the manufacture of extruded food products, the cooling die including: a plurality of core members forming a main body portion of the cooling die between die inlet and outlet ends and arranged about an axis of the die in neighboring relationship; a plurality of extrudate flow channels extending through the cooling die from the inlet end to the outlet end, defined by gaps between neighboring ones of said core members; at least one bore in each said core member through which coolant may flow; an enclosing structure adapted to secure the core members against radial movement relative to the die axis; means for connecting the cooling die to an outlet of a food extruder, a cooling fluid source and a cooling fluid receptacle; and extrudate flow distribution means, located adjacent the inlet end, adapted to direct extrudate from the outlet of the food extruder into selected ones of said extrudate flow channels.

The invention relates to an anti-blocking agent of a fertilizer. The anti-blocking agent is prepared from the following components in percentage by weight: 45-85% of natural ore powder, 5-20% of a modifier and 10-50% of modified plastic, wherein the natural ore powder is in a layered structure and has water swellable disintegration capacity, and the modifier is one or a mixture of more of a silane coupling agent, a phosphate coupling agent, a titanate coupling agent, stearic acid and salts thereof, oleamide, high alcohols and C14-C22 alkylamine. The anti-blocking agent of the fertilizer provided by the invention has the characteristics of convenience in addition to use, good anti-blocking effect and no block of the fertilizer stored for over half a year. The anti-blocking agent of the fertilizer is strong in universality and suitable for compound fertilizers such as urea-based, nitryl, chlorine-based and sulfenyl compound fertilizers or similar particle fertilizers.

The invention provides a router with a hardware encryption and decryption function and an encryption and decryption method of the router. The router includes a routing function module and a field programming gate array-based hardware encryption and decryption module, wherein the routing function module and the field programming gate array-based hardware encryption and decryption module are connected with each other; the hardware encryption and decryption module encrypts plaintexts received by the routing function module from the outside or decrypts ciphertexts received by the routing function module from the outside; and the routing function module transmits out encrypted data generated by the encryption of the hardware encryption and decryption module or decrypted data generated by the decryption of the hardware encryption and decryption module through a wireless channel. In a work process, the routing function module of the router is not utilized to encrypt or decrypt the received plaintexts or ciphertexts, but the hardware encryption and decryption module is utilized to realize encryption and decryption, and therefore, the router can perform high-speed safe hardware encryption on the received plaintexts or ciphertexts, and at the same time, high-speed and effective forwarding of the encrypted data and the decrypted data of the router can be ensured.

The invention discloses a core-double shell structure composite nickel-cobalt-manganese ternary precursor material and a preparation method and an application thereof. The core-double shell structurecomposite nickel-cobalt-manganese ternary precursor material comprises an inner core, a secondary shell layer and an outermost shell layer, wherein a chemical formula of the inner core material is Nix1Coy1Mn(1-x1-y1)CO3, x1 is greater than 0 and less than 1, y1 is greater than 0 and less than 1, and 1-x1-y1 is greater than 0 and less than 1, at least one part of an outer surface of the inner coreis coated with the secondary shell layer, a chemical formula of a material of the secondary shell layer is Nix2Coy2M(1-x2-y2)(OH)2, M is Mn and/or Al, x2 is larger than 0 and smaller than 1, y2 is larger than 0 and smaller than 1, and 1-x2-y2 is larger than 0 and smaller than 1, an outermost shell layer coats at least one part of an outer surface of the secondary shell layer and is made of metal hydroxide and/or metal oxide. The material is advantaged in that the single battery prepared from a positive electrode material prepared from the core-double shell structure composite nickel-cobalt-manganese ternary precursor material can realize long cycle life on the basis of high specific energy, so a vehicle loaded with the battery has excellent cruising ability, and use requirements of consumers are met.

The invention discloses high-performance bio-based composite film and a preparation method thereof, and belongs to the technical field of functional materials. The method mainly adopts polylactic acidas matrix, and uses cellulose nanocrystal as a reinforcing filler, composite fiber film is prepared by an electrospinning method, the addition of the cellulose nanocrystals can increase the storage modulus of the composite film by up to 500%, after water is absorbed, the storage modulus can be increased by up to 900%, the storage modulus of the composite film is obviously improved, pores are larger, cells can be effectively adsorbed and grown on the fiber film, the mechanical strength is also improved, and the addition of the the cellulose nanocrystals further broadens the application of polylactic acid in the field of biomedicine. The method uses an acid hydrolysis method to prepare the cellulose nanocrystals, cellulose raw material sources are wide, the acid hydrolysis method is simpleand easy to operate, and a product price is low. The film functions as a medical stent to promote drug absorption and cell growth.

The invention relates to the technical field of refrigeration and low-temperature application, and provides an insulation supporting device. The insulation supporting device comprises an external pipeline and a supporting part used for supporting an inner part, wherein the inner part is arranged in the external pipeline; the supporting part comprises a supporting strip; the two ends of the supporting strip along the heat conduction path of the supporting strip are respectively connected with the external pipeline and the internal part, or one end of the supporting strip along the heat conduction path of the supporting strip is connected with the external pipeline or the internal part; and the length of the heat conduction path of the supporting strip is greater than the distance between the external pipeline and the inner part. The insulation supporting device has the advantages of being simple in structure and convenient to manufacture; and the heat transfer resistance between the external pipeline and the internal part is increased while the support of the internal part is satisfied and the mechanical isolation between the internal part and the external pipeline is guaranteed, the long-distance transmission of low-temperature cold or low-temperature fluid through the internal part are conveniently achieved, and the loss of the low-temperature cold in the transmission processis reduced.

The invention provides a novel two-section type seven-phase permanent magnet fault-tolerant motor and belongs to the technical field of permanent-magnet synchronous motors. The motor comprises a motor shell, two rotor assemblies, two stator assemblies, a rotary shaft, a bearing, a bush, an insulating sleeve, a magnet isolating board and an end cover. The two stator assemblies and the two rotor assemblies are coaxially installed on the same shell. The two stator assemblies are a three-phase winding and a four-phase winding respectively and connected with the rotary shaft through the rotor assemblies respectively, so that a three-phase permanent magnet fault-tolerant motor section and a four-phase permanent magnet fault-tolerant motor section are formed. The magnet isolating board is installed between the two motor sections. Phase windings of the stator assemblies are in a concentrated single-layer winding mode and are embedded separately through teeth. Power is supplied to each phase winding through an independent H-bridge driving mode. The novel two-section type seven-phase permanent magnet fault-tolerant motor is good in physical isolation capacity, magnetic field isolation capacity, thermal field isolation capacity and electric isolation capacity and can effectively restrain short circuit currents of the permanent magnet motor, greatly improve the reliability of the permanent magnet motor and satisfy the requirements for primary fault work, secondary fault work and third fault safety.

The invention discloses an aluminum alloy surface passivation treatment method and belongs to the technical field of aluminum alloy processing. A treated aluminum alloy material is prepared through steps as follows: (1) surface pretreatment; (2) oxidation treatment; (3) passivation treatment. The aluminum alloy surface passivation treatment method has the characteristics of being simple, mild in process condition and convenient to operate; a passivated aluminum alloy has better oxidation resistance and corrosion resistance, the service life of the aluminum alloy is greatly prolonged, conditions are provided for promotion and application of the aluminum alloy, and the aluminum alloy surface passivation treatment method has better application value.

Compositions are disclosed for dewatering mixtures of petroleum and water. The compositions comprise one or more of the following: an unreacted polysaccharide component; and one or both of a polysaccharide component reacted with a hydrophilic component and a polysaccharide component reacted with a hydrophobic component. The compositions may also include viscosifying agents or stabilizers to stabilize the compositions against separation, for example, prior to use. In particularly preferred embodiments the invention is drawn to compositions for breaking an emulsion; such compositions comprising a carbohydrate component containing a cationic starch joined to a hydrophobic moiety, providing the carbohydrate component oil solubility. The composition may optionally comprise one or more additional demulsifier selected from, without limitation, salts (such as a polyaluminum chloride, an aluminum chlorohydrate, an alum, etc.), metal salts (such as iron and zinc salts), dithiocarbamate, tannin, and organic demulsifiers such as poly-DADMAC and similar compounds.

The invention discloses a nano flame-resistant concrete protective coating and a preparation method thereof, and the protective coating comprises the following components in parts by weight: 55-75 parts of a modified nano silica sol emulsion, 8-10 parts of attapulgite whiskers, 3-5 parts of a Schiff base modified graphene compound, 0.2-0.5 part of a wetting dispersant, 0.2-0.5 part of a thickening agent, 0.2-0.5 part of a defoaming agent, 1-3 parts of a leveling agent. and 25 to 35 parts of deionized water. The preparation method comprises the following steps: mixing the modified nano silica sol emulsion, the attapulgite whisker and the Schiff base modified graphene compound according to the formula of the protective coating, and stirring and dispersing at a high speed for 30-60 minutes by adopting a high-speed dispersion machine; adding the rest wetting dispersant, a thickening agent, a defoaming agent, a flatting agent and deionized water into the protective coating formula; and adjusting the state of the high-speed dispersion machine to medium-speed stirring dispersion, continuously stirring uniformly, filtering and packaging. The protective coating provided by the invention has good physical and chemical properties such as alkali resistance, water resistance, weather resistance, adhesive force, fire resistance and the like.

The invention discloses an auxiliary mechanism of a direct-current contactor. The direct current contactor comprises an arc extinguishing cavity and a driving coil arranged outside the arc extinguishing cavity; the auxiliary mechanism comprises a shielding ring, a trigger conductor and a detection assembly. The shielding ring is arranged in the arc extinguishing cavity; the trigger conductor and the detection assembly are arranged in a space defined by the shielding ring, and when the driving coil is in a non-powered-on state or a powered-on state, the trigger conductor can correspondingly make contact with or disconnect from the connecting elastic piece on the detection assembly, and then the detection assembly is correspondingly in a powered-on state or a powered-off state. The auxiliarymechanism of the DC contactor is simple, novel and reasonable in structure, and can greatly improve the working accuracy, stability and reliability of the DC contactor.

The invention provides an electrostatic spinning gel fiber membrane and a preparation method and application thereof. The electrostatic spinning gel fiber membrane is prepared from an electrostatic spinning solution A and an electrostatic spinning solution B. The electrostatic spinning solution A is a mixed solution of carboxymethyl chitosan, a water-soluble polymer and deionized water; the electrostatic spinning solution B is a mixed solution of hydroformylated polysaccharide, a water-soluble polymer and deionized water. The electrostatic spinning solution A and the electrostatic spinning solution B which have chemical reactivity are used for common electrostatic spinning, and gel is formed in situ through Schiff base reaction between carboxymethyl chitosan and hydroformylated polysaccharide; the prepared electrostatic spinning gel fiber membrane can be used as a wound dressing to directly act on damaged tissues such as skin, abdominal cavity, liver, spleen, pelvic cavity and the like of mammals, and has the effects of stopping bleeding, preventing adhesion and promoting wound healing.

The invention discloses a built-in alternative-pole permanent-magnet motor based on a rotor complementary structure. In the motor, a permanent magnet pole S (7), a permanent magnet pole N (8) and an iron core pole (9) are respectively disposed in a first rotor (2), a second rotor (3) and a third rotor (4) in a heteropolar alternative-pole mode. The three-rotor structure is nested in a stator (1),and is coaxial with the stator (1). The stator (1) comprises armature teeth (5) and fault-tolerant teeth (6), wherein the armature teeth (5) and fault-tolerant teeth (6) are alternately arranged alongthe periphery of the stator (1). The armature teeth (5) is provided with an armature winding (10), and the armature winding (10) is wound in a mode of single-layer fractional-slot centralized winding. Compared with a multi-stator structure and a distributed winding, the alternative-pole rotor complementary structure is simple and reliable, is low in cost, has no magnetic circuit coupling, is small in copper loss, and is high in efficiency. Because the stator (1) is just provided with one single-layer fractional-slot centralized winding, a motor end part is small in loss, and the torque and power density are high.