36results about How to "Maintain mechanical stability" patented technology

A system for regulating the functioning of an organ or duct generally includes an implantable band structured to at least partially circumscribe an organ or duct and an actuating mechanism operable to effect constriction of the band. The system further includes a plurality of incompressible cushion segments defining a substantially star-shaped inner circumference of the band, the star-shape effective to prevent pinching and necrosis of tissue during adjustment.

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

A compound aircraft features variable incidence wings, a thruster, a rotor and a clutch connecting the engines to the rotor. Upon reaching a suitable forward speed, the control system of the compound aircraft unloads the rotor and disengages the clutch, disconnecting the rotor from the engines. The control system configures the cyclic and collective pitch effectors to cause the rotor to autorotate. The control system selects an autorotation rotational speed that is adequately rapid to prevent excessive deformation of the rotor blades due to aerodynamic forces acting on the blade and that is adequately slow to prevent excessive compressibility effects.

A system for regulating the functioning of an organ or duct generally includes an implantable band structured to at least partially circumscribe an organ or duct and an actuating mechanism operable to effect constriction of the band. The system further includes a plurality of incompressible cushion segments defining a substantially star-shaped inner circumference of the band, the star-shape effective to prevent pinching and necrosis of tissue during adjustment.

The invention discloses a preparation method for a high flux solvent-resisting organic / inorganic hybridized compound film doped with aminated graphene quantum dot, a prepared compound film and an application of the film. The preparation method for the compound film comprises the steps of interfacial polymerization reaction, chemical crosslinking and solvent activation. According to the invention, the aminated graphene quantum dot is added into an interfacial polymerization monomer solution, so that the separating property and solvent resistance of the film are obviously promoted; the film-making time is shortened in the manner of increasing the cross-linking and solvent activating time; a large quantity of amino groups are loaded on the surface of the aminated quantum dot and can react with an organic phase monomer so as to form a firm covalent bond, so that the performance of the film is promoted while the stability of the quantum dot in the film is obviously promoted. According to the invention, the preparation process is simple and the film has wide application prospect in the fields of organic solution system separation and organic solvent-containing water treatment.

The invention discloses a vacuum squeezed state light field generation device and method. The device comprises a laser, an optical parametric oscillator, a frequency shifting device, a temperature control device, a lock cavity device, a half wave plate, a first polarized light beam splitter, a second polarized light beam splitter and a dichroic mirror. Due to the frequency shifting device, rapid frequency shifting of continuous single-frequency laser can be achieved, fill-in light is obtained, and the broadcasting direction of the laser cannot be changed; fill-in light passes through the optical parametric oscillator to obtain fill-in light with cavity information, the lock cavity device can generate a lock cavity signal according to the fill-in light with the cavity information and perform cavity length locking on the optical parametric oscillator, the temperature control device can achieve precise temperature control over crystals, and the optical parametric oscillator works in the degenerate state. By adopting the device or method, the problem that seed light is injected or a triply resonant optical parametric oscillator must be adopted can be avoided, the mechanical stability of the optical parametric oscillator is maintained, and therefore the stably-output vacuum squeezed state light field is obtained.

The invention discloses an ultra-thin composite film with graphene quantum dots as an intermediate layer and a preparation method of the composite film. The preparation steps of the ultra-thin composite film with the graphene quantum dots as the intermediate layer comprises a graphene quantum dot intermediate layer addition step, an interfacial polymerization reaction step, a chemical crosslinkingstep, and a solvent activating step. The separation performance of the film is significantly improved by adding the graphene quantum dot intermediate layer, the graphene quantum dots have a large amount of hydroxyl groups and carboxyl groups, the hydrophilicity of a base film can be increased, the pore size is reduced, the interfacial polymerization reaction is facilitated, and therefore the separation performance of the film is effectively improved. The preparation process is simple, and the composite film has a good application prospect in the field of organic solution system separation.

The invention discloses a hybrid composite membrane, a preparation method and application of the prepared hybrid composite membrane. The preparation method of the hybrid composite membrane comprises an interface polymerization step, a polyamine modification step, a chemical crosslinking step and a solvent activation step. According to the invention, low-concentration interfacial polymerization iscarried out on a graphene oxide intermediate layer, so that the flux and solvent resistance of the membrane are obviously improved. Because the graphene oxide intermediate layer has a large number ofoxygen-containing functional groups, the hydrophilicity of a base membrane is greatly increased, the interfacial polymerization process of low-concentration monomers is regulated and controlled, the crosslinking degree of an interfacial separation layer is enhanced, and the solvent resistance of the membrane is improved. By adopting the low concentration monomer interfacial polymerization, the surface roughness of the membrane can be effectively improved. The hybrid composite membrane has simple preparation process and good application prospect in the field of organic solvent system separationand water treatment containing organic solvents.

The invention discloses a turning method for a duplex stainless steel P-type block, and belongs to the technical field of ship building. The method comprises the following steps that firstly, turningmain hooks, turning auxiliary hooks and translation main hooks are arranged on the P-type block; secondly, lifting hooks of a first crane are connected with the turning main hooks, lifting hooks of asecond crane are connected with the turning auxiliary hooks, and the lifting hooks of the first crane and the lifting hooks of the second crane rise; thirdly, when the rising height of the P-type block is two times the height of the P-type block, the lifting hooks of the first crane and the lifting hooks of the second crane stop rising, and the lifting hooks of the second crane fall; and fourthly,when the stress of the lifting hooks of the second crane is zero, connection between the lifting hooks of the second crane and the turning auxiliary hooks is relieved, the lifting hooks of the secondcrane are connected with the translation main hooks and rise, and turning of the P-type block is achieved. According to the method, by reasonably arranging lifting rings, direct contact between the lifting rings and a stainless steel material is avoided, and it is guaranteed that the performance of duplex stainless steel is not influenced.

The invention discloses nitrogen-doped graphene fiber non-woven fabric and a preparation method thereof. A graphene slice layer forming graphene fiber contains a certain number of doped nitrogen heteroatoms, and the nitrogen-doped graphene fiber non-woven fabric can be obtained through self-fusion of the graphene fiber. The nitrogen-doped graphene fiber non-woven fabric and the preparation methodthereof have the advantages that the improvement of the hydrophilia, electrical conductivity and electrochemical activity of the graphene fiber and non-woven fabric structure are facilitated, and therefore, the nitrogen-doped graphene fiber non-woven fabric is a high-performance electrode material used for an aqueous electrolyte system energy storage device.

The invention provides a copper (II) ion surface imprinted polymer supported by polystyrene. The copper (II) ion surface imprinted polymer is prepared by using an unsaturated quaternary ammonium cation modified salicylaldoxime copper (II) complex as a functional monomer and polyene propyl ammonium salt as a cross-linking agent through copolymerization of framework monomers on the acryloyl polystyrene surface; the imprinted polymer is used as a solid phase imprinted two-position extracting agent of copper (II) and is used for selective enrichment and separation of copper (II) ions in each watersystem; the characteristic and the function of simultaneously extracting counterbalancing anions are realized. An effective method is provided for removing copper (II) ions in various water systems and realizing the auxiliary detection, separation and enrichment of copper (II) ions in various water systems; the copper (II) ion surface imprinted polymer can show the foam, diaphragm plate, filamentor particle forms.

The invention discloses a high-Mo-content biomedical beta-titanium alloy and a preparation method thereof. The alloy comprises three alloy elements including titanium (Ti), molybdenum (Mo) and stannum (Sn). Alloy components of the alloy comprise, by weight percent, 20%-60% of the molybdenum (Mo), 0-20% of the stannum (Sn) and the balance titanium (Ti). The alloy is prepared through a high-temperature melting method, an electric arc melting method, a powder metallurgic method, a high-frequency induction method or a mechanical alloy method. The alloy has the following beneficial effects that the alloy elements including molybdenum and stannum completely compatible with the human body are selected, excellent biocompatibility is achieved, and toxicity is avoided; and the elasticity modulus is low (E=50-60 GPa) and is lower than that of a Ti-6Al-4V alloy by 40%-50%. The alloy can be used as a biomedical titanium alloy for dentistry and is mainly used for clinic mouth rehabilitation, implanting, orthodontics and the like.

A bipolar junction transistor (BJT) requires the fabrication of a BJT structure and of a support post which is adjacent to, but physically and electrically isolated from, the BJT structure. The BJT structure includes a semi-insulating substrate, a subcollector, a collector, a base, and an emitter. Metal contacts are formed on the subcollector and emitter to provide collector and emitter terminals. Contact to the structure's base is accomplished with a metal contact which extends from the top of the support post to the edge of the base nearest the support post. The contact bridges the physical and electrical separation between the support post and the base and provides a base terminal for the device. The base contact need extend over the edge of the base by no more than the transfer length associated with the fabrication process. This results in the smaller base contact area over the collector than would otherwise be necessary, and a consequent reduction in base-collector capacitance. The invention is particularly useful when forming heterojunction bipolar transistors (HBTs), built on a compound semiconductor substrate such as indium phosphide (InP).

The invention provides a method for producing a plate heat exchanger (1). Wavy profiled sheets (9) and separating sheets (10), together with sidebars (11), are stacked one above the other, provided with solder and soldered together in such a way that a block (2) is obtained. The block is closed off outwardly by means of the cover sheets (12). The contours of the intermediate pieces (3) are milled out at the respective positions (4) on the block (2) thus obtained. In a refinement of the invention, frames are used as intermediate pieces (3). The frames 3 are positioned in the milled-out portions at the positions (4), provided with solder and tacked on by means of spot welding. Subsequently, in a second step, the frames (3) are soldered onto the heat exchanger block (2). The headers (5a, 5b) are in each case welded onto the frames (3).

The invention relates to a heteroatom-doped graphene nanofiber non-woven fabric and a preparation method thereof. The heteroatom-doped graphene nanofiber non-woven fabric has a net-shaped structure formed by mutually fusing and overlapping graphene fibers. The non-woven fabric is prepared by the following steps: performing mixed wet spinning on graphene oxide and a heteroatom compound to obtain heteroatom-containing composite graphene fibers; forming a mutually lapped network skeleton through melting and recasting by utilizing relatively strong interaction among fibers; and soaking the above in ferric trichloride, and carrying out heat treatment to obtain the heteroatom-doped graphene nanofiber non-woven fabric. The specific surface area and active sites of a communicated network structure formed by heteroatom-doped nanofibers are remarkably increased, and meanwhile, the composite material has relatively high conductivity and flexibility, can be used as a flexible electrode material, and has very wide application prospects in the fields of energy sources, electrons, catalysis, biological medicines and the like.

The invention provides polystyrene-supported anion-cation double exchange type copper (II) ion surface imprinted polymer which is prepared by performing copolymerization with skeleton monomers on polyenoic allyl ammoniated polystyrene surfaces by taking an unsaturated quaternary ammonium cation-modified sulfated aldoxime copper (II) complex as a functional monomer and polyenoic allyl ammonium saltas a cross-linking agent; the polymer can be used as solid-phase blotting bi-site extractant for copper (II) to perform selective enrichment and separation of copper (II) ions in various aqueous systems; the polymer has the function and characteristic of simultaneously extracting counter-anions and can be used in methods for removing the copper (II) ions in the various aqueous systems and methodsfor detecting, and separating and enriching the copper (II) ions in the various aqueous systems in an auxiliary manner; and the anion-cation double exchange type copper (II) ion imprinted polymer canbe in forms of foam, diaphragm plates, fibrils or particles.

The invention discloses an all-solid-state lithium battery composite positive electrode prepared based on a permeation method and a preparation method thereof, and relates to the technical field of all-solid-state lithium batteries. The all-solid-state lithium battery positive electrode is a composite positive electrode obtained based on a melt permeation method. According to the invention, Li1+xOHBrx with high ionic conductivity, which is obtained by calcination, is melted and permeated into pores of a positive pole piece under a heating condition, so that the composite positive pole is obtained. The composite positive electrode is compact and uniform in surface and extremely low in porosity, and can form a solid-solid interface with good contact with a solid electrolyte, so that the solid-solid contact area is increased, a stable and rapid lithium ion channel is provided, the interface resistance is reduced, and finally, the performance of the solid-state battery is remarkably improved.

A supporting body (1) for guiding or tensioning a circumferential traction mechanism of a traction drive, a front side (12) that has an elongated sliding surface for making contact with the traction mechanism, a rear side (2) that lies opposite and includes an elongated receiving groove (5) for form-fittingly receiving a reinforcement panel, the receiving groove (5) being formed by delimiting elements (3) which protrude, at the sides of the groove, from the rear side, and at least two delimiting elements (3, 3′) on one side of the receiving groove (5) being separated in the longitudinal direction by a spacing in the form of a gap (4).

The invention relates to an anti-corrosion fluoroplastic aqueous dispersion liquid, which belongs to the technical field of anti-corrosion coatings. The aqueous dispersion includes a preservative and a fluoroplastic aqueous dispersion. The preservative is an organic compound containing the general formula 1, and its acute toxicity is: rat oral LD50: >2000 mg / kg; the general formula 1 is: XO— R—CO 2 A; where X is a hydrogen atom or a sodium ion, R is an aromatic hydrocarbon organic group with 6 carbon atoms, and A is —CH 3 、—CH 2 CH 3 、—CH 2 CH 2 CH 3 or—CH 2 CH 2 CH 2 CH 3 One of; XO—and—CO 2 The position of A on R is paraposition. The antiseptic fluoroplastic aqueous dispersion provided by the invention has good antibacterial and antiseptic capabilities, extremely low toxicity and is environmentally friendly, and meanwhile, can maintain the viscosity and mechanical stability of the fluoroplastic aqueous dispersion.

The present invention relates to inductor coils for induction welding of packaging materials. An inductor coil for induction welding of packaging material having at least one layer of metal foil is disclosed. The inductor coil is configured to induce an alternating current in the metal foil to inductively heat the packaging material. The inductor coil includes a base material, a top material bonded to the base material to form an irreversibly bonded interface comprising a mixture of the base material and the top material. Also disclosed is an induction sealing device comprising at least one inductor coil, and a method of manufacturing an inductor coil for induction welding packaging material.

The invention discloses a finishing process of a polypropylene operating coat, and relates to the technical field of operating coat finishing processes. The finishing process comprises the following steps: 1, melting; 2, fabric preparation; 3, sewing; 4, finishing agent preparation, wherein a finishing agent is proportioned by the following components by weight: 50-60 parts of isotridecyl alcoholpolyoxyethylene ether, 8-15 parts of tween-65, 12-19 parts of polyethylene glycol glyceryl ether, 1-5 parts of N-cetylpyridinium chloride, 10-20 parts of water, 5-10 parts of an antistatic agent and 7-12 parts of a penetrating agent, 5, dipping; 6, baking; and 7, sterilizing. According to the invention, the antistatic agent TF-481 and the penetrating agent TF-1010S are added into the finishing agent, and the anti-alcohol, anti-blood and anti-static effects of the polypropylene operating coat are enhanced, and meanwhile, the original fiber net structure and the mechanical property stability ofthe polypropylene operating coat are kept.

The invention discloses a'fruit and mud 'composite ecological slope protection structure and a construction method thereof. The structure comprises a plurality of anchor rods buried in a side slope and a reinforcing mesh laid along the slope surface of the side slope and fixed to the anchor rods, and a plurality of cushion blocks are placed between the slope surface and the reinforcing mesh and used for supporting the reinforcing mesh; the slope surface of the side slope is sequentially covered with a first cement soil protection layer and a second cement soil protection layer; a biological bacterial fertilizer leavening agent is doped into cement soil sprayed by the first cement soil protection layer, and fruits to be rotten are sprayed after the cement soil is sprayed and embedded into the first cement soil protection layer; seeds and a biological base material are doped in cement soil sprayed by the second cement soil protection layer. After the cement soil is sprayed for the first time, fruits which are about to rot are sprayed, the fruits which are prone to rot and the biological bacterial fertilizer leavening agent are used for forming embedded communicating holes for plant growth and water storage, and meanwhile the second layer of cement soil is embedded into the holes formed by fruit rot and provides a certain occlusal force for the second layer of cement soil. And the effect of reinforcing the high and steep slope is achieved.

The invention discloses composite lubricating grease special for a ship, and belongs to the technical field of lubricating grease. The composite lubricating grease special for the ship is obtained through a reaction of following components: 80 to 90 parts of base oil, 30 to 40 parts of thickening agent, 15 to 25 parts of emulsion breaker, 3 to 6 parts of anti-wear reagent at extreme pressure, 2 to 5 parts of purification dispersing agent and 5 to 8 parts of friction modifier. The base oil is composed of polyolefin and fluorocarbon oil. The thickening agent is composite soap base thickening agent. According to the composite lubricating grease special for the ship, through the special combination of the thickening agent and the base oil, all kinds of auxiliary agents are added, the stability of the physical property of the composite lubricating grease special for the ship is guaranteed and the mechanical stability is maintained while the comparatively good physical property of the lubricating grease is guaranteed and the resistance to the extreme pressure property is improved greatly, no corrosion exists on metal, environmental protection is achieved, and good practicality is achieved.

A rechargeable battery pack includes at least one individual cell which is accommodated in a cell holder and is in electrical contact on a contact side via a cell connector. An electric load is to be connected via a contact plate which has a plurality of plug-type connections, wherein the contact plate is located on one side face of the cell holder. In order to compensate positional tolerances between the plug-type connections of the contact plate and external connection contacts, a mount for the contact plate is provided on one side face of the cell holder, in which mount the contact plate is mounted so as to be displaceable in a displacement direction. The electrical connection between the individual cell and the contact plate is embodied by an elastic contact strip, wherein the contact strip is embodied so as to be resilient in a sprung fashion in the displacement direction of the contact plate.

The invention relates to a coaxial cable (100) comprising an inner conductor (110) and an outer conductor (120) which is arranged radially outside of said inner conductor (110) and which is electrically isolated from said inner conductor (110), wherein at least one stress absorbing element (130) for absorbing mechanical stress is arranged radially between said inner conductor (110) and said outerconductor (120).

A rechargeable battery pack includes at least one individual cell which is accommodated in a cell holder and is in electrical contact on a contact side via a cell connector. An electric load is to be connected via a contact plate which has a plurality of plug-type connections, wherein the contact plate is located on one side face of the cell holder. In order to compensate positional tolerances between the plug-type connections of the contact plate and external connection contacts, a mount for the contact plate is provided on one side face of the cell holder, in which mount the contact plate is mounted so as to be displaceable in a displacement direction. The electrical connection between the individual cell and the contact plate is embodied by an elastic contact strip, wherein the contact strip is embodied so as to be resilient in a sprung fashion in the displacement direction of the contact plate.