59results about How to "Controllable load" patented technology

The invention provides a method for preparing a graphene-epoxy resin composite material, comprising the following steps of mixing epoxy resin and a graphene solution in ratio; controlling the temperature at 60-120 DEG C; stirring for 5-60min; standing for 30min to layer; pouring out an aqueous solution at the upper layer; continuously stirring graphene-epoxy resin at the lower layer at the temperature of 80-150 DEG C and reactng for 2-12h; adding an epoxy resin curing agent, curing for 1h at the temperature of 100 DEG C, and then curing for 2h at the temperature of 150 DEG C, wherein the used epoxy resin is bifunctional bisphenol A epoxy resin or bifunctional epoxy resin. The method has the advantages of no environmental pollution in aqueous-phase reaction, recyclable water at the upper layer, simple operation process and controllable loading and is easy for preparation and synthesis in large scale. The prepared graphene-epoxy resin composite material has good monodispersity. Compared with an epoxy resin composite material, the rigidity of the prepared graphene-epoxy resin composite material is increased by above 50 percent, and the impact resistance is increased by near 12 times.

The invention discloses a method for loading nano-particles of metal or metallic oxide in a mesoporous silica channel. The method comprises the following steps: taking a cation-type quaternary ammonium surfactant as a template, dispersing in water, heating and stirring until a clear and transparent solution is formed; adding an alkaline solution in the solution to adjust pH value being 9-12, adding silicon source for a first step to obtain a mesoporous silica-containing reaction system; then adding an aqueous solution of a precursor of the metal or metallic oxide to be loaded in the mesoporous silica-containing reaction system for a second step reaction to obtain the precursor silicon dioxide with the channel having uniformly loaded metal or metallic oxide, and finally roasting to obtain the mesoporous silica matrix composite material. The method has the advantages of simple operation and mild reaction condition, and supported substance distribution, loading capacity and combination can be adjusted at random according to requirement.

The invention provides an advertisement inserting method of a digital program, comprising the following steps: extracting advertisement information from received digital program transport streams; loading the advertisement content of the advertisement information to a background layer of a digital television terminal display module; closing a video layer of the digital television terminal displaymodule to display the advertisement content of the background layer of the digital television terminal display module during the switching of a digital television terminal channel; and starting the video layer of the digital television terminal display module to display the program after certain time. The invention also provides an advertisement inserting control device of the digital program, comprising a digital program processing module, an advertisement TS steam decoding module, a storage module, an uploading module and a display module. The invention can realize that a digital televisionterminal timely displays the advertisement content in an inserting way when a user switches channels.

The invention discloses a mechanical testing system for a material with composite load in an induction heating mode. The mechanical testing system comprises a stretching module driving unit, a double-end torsion module driving unit, a testing system, an induction heating system and a visual system, wherein the stretching module driving unit drives synchronous stretching of a double-end torsion module bearing table along a horizontal direction of testing stand via a bidirectional ball screw; a double-end torsion module implements a double-end torsion loading conditions on a to-be-tested workpiece; the induction heating system comprises a motion part and an induction heating part and used for simulating testing of the to-be-tested workpiece under a high temperature condition; and the visual system comprises an industrial endoscope and an industrial camera, wherein the industrial endoscope can withstand certain high temperature conditions and used for acquiring and observing dynamic strain process of the to-be-tested workpiece under a thermo-mechanical coupling condition. The mechanical testing system provided by the invention can test the to-be-tested workpiece under the conditions of single load like stretching, torsion and fatigue and composite load, and employs the high-temperature endoscope and the industrial camera for testing of the dynamic strain process of the to-be-tested workpiece.

The invention discloses a nanometer photo-catalyst used in producing hydrogen by decomposing water under visible light response and application of the nanometer photo-catalyst. The catalyst is a nanocomposite which is formed by taking a one-dimensional organic semiconductor nanofiber as a framework, coating the surface of the framework with an inorganic semiconductor titanium dioxide nanolayer and uniformly loading platinum nanoparticles, wherein the organic semiconductor nanofiber is prepared by self-assembling super molecules of perylene diimide and cycle-expanding derivatives, naphthalene diimide derivatives or hexabenzobenzene diimide derivatives with the photochemical stability, D-A structures and visible light response, then titanium dioxide is directly loaded in situ in a body phase organic solution and platinum is reduced and deposited through ultraviolet light in a photo-catalysis aqueous solution system. The catalyst is novel in structure, low in cost and available; the preparation process of the catalyst is simple, environmentally-friendly, low in energy consumption and suitable for preparation in scales; the catalyst is capable of decomposing water in the visible light to prepare the hydrogen, has the actual and wide application prospects in preparation of the hydrogen through decomposing the water in solar light and provides a novel idea and an important reference for forming an efficient photo-catalyst responding to the visible light.

The invention provides an illumination control system utilizing a microcontroller and an illumination control method. The illumination control system mainly comprises the microcontroller, a semiconductor switch element and a light source load. The microcontroller outputs zero crossing point delay pulses which are synchronous with a positive and negative half cycle of an alternating current power supply so as to trigger and control the conduction time interval of the semiconductor switch element, and switches and outputs zero crossing point delay pulses with different delay time according to external control signals so as to control the conduction time interval of the semiconductor switch element respectively to transfer different average electric power to the light source load, thereby enabling the light source load to output different illumination intensity. The illumination control system is suitable for light sources of different load types simultaneously, especially filament lamps, daylight lamps and alternating current light-emitting diodes.

The invention belongs to the field of biomaterials, and particularly relates to a metal organic framework/electrospinning fiber composite having NO and copper ion slow release synergistic reactions, and a preparation method and application. According to the material, a patterning structure is formed through mutual interweaving of fibers having a core shell structure, hydrophobic biomaterials are used as a core layer of the core shell fibers, hydrophilic biomaterials are used as a shell layer of the core shell fibers, and NO loaded copper bases MOF coat the core layer. The preparation method comprises the steps of using a patterned receiving template, dispersing the NO loaded copper bases MOF, enabling an organic solvent in which the hydrophobic biomaterials dissolve to communicate with aninternal needle of a coaxial electrostatic spray head, enabling an organic solvent in which the hydrophilic biomaterials dissolve to communicate with an external needle of the coaxial electrostatic spray head, and preparing the metal organic framework/electrospinning fiber composite through coaxial electrostatic spinning. In order to solve the problems that the wound healing rate of diabetes is low and angiogenesis is insufficient, the material slowly release NO and copper ions, and the NO and the copper ions are in synergistic reactions to jointly promote angiogenesis, collagen deposition, reduction of inflammatory reactions and the like in wound healing, so that the healing period of the wound of the diabetes is greatly shortened.

The invention discloses a sulfur-doped three-dimensional porous graphene/sulfur composite positive electrode material and a preparation method and an application thereof. The sulfur-doped three-dimensional porous graphene/sulfur composite positive electrode material is composed of elemental sulfur deposited on a surface of a three-dimensional carbon skeleton of sulfur-doped three-dimensional porous graphene in situ; and the preparation method comprises the steps of first adding sodium bisulfate to a graphene oxide dispersion to react, then adding sodium sulfide to react under a partially neutral condition, carrying out liquid-solid separation, and performing freeze-drying on a solid product, thereby obtaining the sulfur-doped three-dimensional porous graphene/sulfur composite positive electrode material. A sulfur-doped amount of the composite positive electrode material is large, a sulfur loading capacity is controllable, a load is uniform and a utilization rate of an active substance sulfur is high; the sulfur-doped three-dimensional porous graphene/sulfur composite positive electrode material has the advantages of high specific capacity, high energy density, high stability and the like; and the cycle performance of a lithium-sulfur battery is greatly improved.

The invention discloses a multi-path adjustable self-excited multivibrator. Under the condition that an external trigger signal does not exist, the multivibrator can continuously, periodically and automatically generate rectangular pulses and can be set according to different required frequencies, different width ratios and the number of controllable paths. The type of circuit can be widely applied in various living fields. The circuit is a symmetric multi-path adjustable self-excited multivibrator consisting of a triode, a capacitor and a waveband switch serving as a core element. The circuit does not have a stable state; switch on and switch off of the triode are controlled by charging and discharging of the capacitor; and the circuit automatically excites between two transient states.

The invention relates to a testing system and method for the mechanical efficiency of a gearbox on a vehicle. Four wheels of a testing vehicle are each connected with a TPMS, and each TPMS is connected with a TPMS receiver; a first K-type thermocouple is connected with a hub data acquisition instrument; a second K-type thermocouple is connected with a transmission interface of the testing vehicle,and a signal is transmitted to the hub data acquisition instrument. A current sensor and a voltage sensor are connected with a power generator; the TPMS receivers, the hub data acquisition instrument, the current sensor and the voltage sensor are all in signal connection with a controller. The whole-vehicle gearbox mechanical-efficiency testing on a hub test bed has the advantages of convenient operation, controllable loading, reliable testing results and provision of the third party data collection. The mechanical efficiency study uses the whole gearbox as an object, the characterization accuracy is high, the test reliability is improved, and the system and method has important guiding significance for the development of gearboxes.

The invention provides a method for preparing a fuel cell thin film electrode by using nanoporous gold. The preparation method comprises the following steps of firstly taking a gold foil as a raw material, and obtaining a nanoporous gold thin film through a dealloying method; secondly, transferring the thin film to one side of an ion exchange film; and finally, taking the composite thin film as a support layer and depositing a catalyst by an electrochemical method to form the nanoporous gold thin film electrode. The electrochemical deposition method adopted by the invention has the advantages of environmental friendliness, controllable catalyst loading, easiness in amplification and the like, and the constructed nanoporous gold thin film electrode can be used for a fuel cell, other batteries and other electrochemical reactors.

The invention relates to a method for preparing a low-platinum Pt-based alloy catalyst through H2 gas phase thermal reduction. The preparation method comprises the following steps: 1) adding a precipitant or a chelating agent, and chelating and settling a Pt precursor; 2) adding a precipitant or a chelating agent, and chelating and settling non-noble metal alloy components; 3) uniformly mixing thesediments in the steps (1) and (2) and loading the sediments on a carbon carrier; 4) centrifuging, washing and drying the product obtained in the step 3) to obtain a precursor; and 5) carrying out pyrolysis reduction on the precursor in an H2 atmosphere, and controlling the reduction temperature and time to obtain a high-activity platinum alloy catalyst. The catalyst forms a nano polygonal structure and has excellent catalytic activity and stability. The preparation method of the catalyst is simple, has the characteristics of adjustable noble metal loading capacity, high activity and stable performance, and has important application value in the fields of catalytic oxygen reduction reaction and fuel cells.

The invention discloses a detection method of a hydraulic cylinder. A tee is connected to an oil return pipe behind a solenoid directional valve of an existing hydraulic cylinder detection pressure testing platform, one way is connected with a ball valve and then is connected with an oil return tank, and the other way is connected with an energy accumulator as a load source, so that controlled pressure is manually added to a corresponding die cavity of the oil cylinder for artificial load; during operation, the to-be-detected oil cylinder is installed on the pressure testing platform, and thepressure value of the energy accumulator is set; then the ball valve is closed, a hydraulic pump is started, hydraulic oil is driven into a front cavity of the oil cylinder by the hydraulic pump, a back cavity of the oil cylinder is directly connected with the energy accumulator at the moment, the pressure of the energy accumulator is adjusted to the set value, therefore, the pressure of the hydraulic oil in the back cavity of the oil cylinder is consistent with the set value of the load, and the load value is obtained by multiplying the pressure by the sectional area; then the solenoid directional valve is operated, and the oil return pipe is still connected with the energy accumulator so as to achieve a loading effect; and after the pressure test is finished, the ball valve is opened, the pressure of the oil return pipe is relieved, and the hydraulic cylinder is removed. The detection method has the characteristics of low manufacturing and maintenance cost and convenience and high efficiency in operation, and the factory reject ratio of the oil cylinder can be obviously reduced.

Belonging to the technical field of energy catalytic conversion, the invention relates to a Pt/C-N composite electrocatalytic material with efficient hydrogen evolution performance and a preparation method thereof. The Pt/C-N composite electrocatalytic material is formed by anchoring Pt metal nanoparticles on the surface of a nitrogen-doped biomass carbon material in situ, the particle size of Ptmetal nanoparticles in the Pt/C-N composite electrocatalytic material is about 1nm-10nm, an exposed crystal face is a {111} active crystal face, and the loading capacity is 3-25wt%. In the Pt/C-N composite electrocatalytic material provided by the invention, N atoms are doped in situ in the biomass carbon material, Pt metal nanoparticles are uniformly loaded on the biomass carbon material, the loading capacity controllable, crystal grain size is adjustable, the Pt metal nanoparticles have excellent electrocatalytic hydrogen evolution activity, and the biomass carbon material and the Pt metal nanoparticles are tightly combined, the stability of the electrocatalytic material in catalytic reaction is substantially improved, and the Pt/C-N composite electrocatalytic material has wide application prospects in the fields of electro-catalysis, electrochemistry, energy, environment, chemical industry and the like.

The invention discloses an SHPB device and method for achieving ultra-high controllable strain rate impact. The device comprises structures of a guiding rail with a T-shape groove, a light gas gun loading mechanism, a light gas gun base, a bullet, a magnetic electricity type particle velocity measuring device, a testing member, an output rod, an output rod fixing device, a strain piece, an absorbing rod, an absorbing rod fixing device, a damping device, a damping device fixing device, a data processing system and the like; the device is characterized in that the impacting on the testing memberof an incidence rod is replaced with the direct impacting on the testing member by the bullet, the particle velocity of the testing member at the incidence end is measured by the magnetic electricitytype particle velocity measuring device, the average stress, strain rate and strain of the testing member are obtained according to unidimensional stress wave assumption and uniform distribution assumption of the stress/strain of a short testing member along the length of the short testing member, and the coaxiality of the device is ensured by the T-shaped groove and bolt connection cooperative action. By means of the device and the method, controllable and ultra-high strain rate (107s<-1> scale) loading can be achieved within a larger range (104-107s<-1> scale), the debugging efficiency canbe improved, the structure is simple, and the dynamic mechanical performance of a material under the ultra-high strain rate is obtained conveniently and rapidly.

The invention discloses an amorphous carbon-silicon-carbon nanofiber graphite composite material as well as a preparation method and application thereof. The method comprises the following steps of onthe surface of graphene, generating carbon nanofibers by utilizing metal catalytic chemical vapor deposition, removing a metal catalyst, then utilizing the carbon nanofibers to catalyze the chemicalvapor deposition of silicon, and finally depositing amorphous carbon to obtain the amorphous carbon-silicon-carbon nanofiber graphite composite material. According to the method, residues of a metal catalyst and the like in the composite material can be avoided, the prepared silicon-carbon composite material is high in electrochemical activity and good in stability, the safety performance of a battery can be improved, and the service life of the battery can be prolonged.

The invention provides a method for preparing a positive electrode of an aluminum battery through magnetron sputtering. The method comprises the following steps: (a) adhering a pretreated aluminum battery current collector to a sample table of magnetron sputtering equipment, mounting a tellurium target material, and preparing sputtering; (b) sputtering a tellurium film on the current collector byusing a direct-current sputtering power supply under the conditions that the voltage is 100-200V, the current is 2-10A, the magnetron sputtering power is 200-2000W and the sputtering air pressure is 0.04-0.4Pa; (c) carrying out heat treatment on the obtained tellurium film in a protective atmosphere to obtain the tellurium film electrode of the aluminum battery; and (d) assembling the tellurium film electrode as a positive electrode and high-purity metal aluminum as a negative electrode in an ionic liquid electrolyte to form the aluminum secondary battery. The tellurium film electrode is freeof a conductive agent and a binder, the preparation method is simple, the electrode loading capacity is easy to control, the components are uniform, the electrochemical performance is good, and a foundation is laid for future commercial development of aluminum batteries.

The invention provides a jiggle corrosion abrasion-micro amplitude collision abrasion test machine. The test machine consists of a main machine and a system, wherein the system comprises a measurementcontrol system and a cooling system; the main machine comprises a device base, a driving motor, an eccentric wheel mechanism, a lever-type swinging-arm mechanism and an electric heating furnace; thelever-type swinging-arm mechanism drives a shaft pin of a rolling bearing serving as a rotating center, and is arranged on the device base through front and rear brackets with balls; a frequency-variable motor enables the lever-type swinging-arm mechanism to produce reciprocating swing by using the shaft pin as the center and using a pin roller bracket as a plane through an eccentric wheel which is arranged at the shaft end and provided with the rolling bearing; each part is lubricated by lubricating grease; and a hole at the bottom of the electric heating furnace enables the lower part of a swinging-arm test section to be supported on the pin roller bracket. The test machine is used for representing the jiggle corrosion abrasion and micro amplitude collision abrasion work properties of crowned turbine blades, blades with various intermediate damping tables and blade vibration damping device and the like in the power mechanical devices in aviation, ship, industrial gas turbine and steam turbine and the like, and can be applied to the similar machinery.

The invention provides a sponge loaded chiral organic catalyst. The sponge loaded chiral organic catalyst is prepared from sponge, a Linker reagent, and a catalyst. The sponge has a polymer skeleton with a 3D porous structure. The sponge contains surface groups. The Linker reagent comprises at least two active functional groups. The catalyst is a nonmetal, chiral, and organic catalyst. The Linker reagent is bonded with the surface groups of the sponge and loaded on the sponge surface through the active functional groups. The catalyst is bonded with the active functional groups of the Linker reagent and is connected to the sponge surface therefore. The chiral organic catalyst can be a proline catalyst, an alpha-amino acid catalyst, an imidazolone catalyst, an oligopeptide catalyst, a quinine catalyst, a planar chiral catalyst, a diaryl catalyst, a diamine catalyst, and other catalysts containing heterocyclic rings.

The invention discloses a preparation method of a M1/M2xP-type monoatomic catalyst. The preparation method includes: (1) in an inert gas atmosphere, dissolving an organic complex M1L2 or M12L2, havingan electron deficiency structure, of a M1 metal in an organic solvent A to prepare a metal/organic complex solution; (2) adding a M2xP-type metal phosphide to an organic solvent B, and in an inert gas atmosphere, dropwise adding the metal organic complex solution, then performing a reaction in the inert gas atmosphere; (3) after the reaction in the step (2) is completed, adding a reducing agent to the system to perform a reduction reaction, and filtering a mixed liquid after the reduction reaction, and washing and drying filter residues to obtain the M1/M2xP-type monoatomic catalyst. The monoatomic catalyst is prepared through a novel coordination technology, so that various metal mono-atoms can be supported on various phosphorus-containing substrates, thus producing monoatomic catalystsin different types. The monoatomic catalysts are controllable in dispersity, active sites and support quantity.

The invention discloses a preparation method of a cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell. The preparation method of the catalyst comprises the following steps: (1) adding a cobalt source to a catalyst containing aniline, pyrrole and triton X-100 percent of deionized water, and stirring to obtain a uniform mixed liquid; (2) adding a precooled ammonium persulfate aqueous solution (initiator) at 3 DEG C into the mixed solution obtained in the step (1) at one time, polymerizing the mixed solution at a low temperature immediately, filtering, washing and drying after the polymerization reaction is completed to obtain a black intermediate product; (3) subjecting the black intermediate product obtained in the step (2) is prepared in anammonia atmosphere to heat treatment at 600 to 800 degree centigrade to obtain a porous carbon catalyst supported on cobalt nitride. Compared with the prior art, the method of the invention is simplein operation, low in cost, high in oxygen reduction reaction activity, good in stability and strong in methanol poisoning resistance, and can be used as a cathode catalyst in a fuel cell.

The invention discloses a preparation method of a semiconductor-carried manganese cobalt composite oxide nanometer material. The method includes the steps that 1, 0.05-50 g of semiconductor carriers are dispersed in 160 mL of deionized water, a semiconductor suspension solution is obtained, 0.01-1 g of potassium permanganate is added to 50mL-5L of deionized water, a potassium permanganate solution is obtained, and the concentration of the potassium permanganate solution is 0.002-20 g/l; 2, the semiconductor suspension solution and the potassium permanganate solution are mixed and irradiated by a 300 W xenon light source, irradiation time is 10-24 hours, by mass, 0.01-50 g of Co salt is added to the solution, then irradiation is conducted for 2 hours, and suction filtration and washing are conducted; 3, an obtained sample is dried, ground and then calcined for 0.5-12 hours at the temperature of 200-1000 DEG C after being ground, and the semiconductor-carried manganese cobalt composite oxide nanometer material is prepared. The preparation method has the advantages of being simple in process, easy and convenient to operate, low in production cost and environmentally friendly.