33results about How to "Restricted use" patented technology

The invention discloses a binder-free polycrystalline cubic boron nitride abrasive and a preparation method thereof. The preparation method of the abrasive comprises the following steps: 1, adding hexagonal boron nitride powder into a die, and carrying out molding preformation; 2, carrying out cold isostatic pressing treatment on the above preformed product under vacuum conditions; 3, adding the above obtained hexagonal boron nitride block into a tantalum cup in order to form an assembled block together with a pressure transmitting medium; and 4, carrying out high temperature high pressure synthesis treatment on the assembled block, carrying out furnace cooling, demolding, crushing, and grading to prepare the abrasive. The binder-free polycrystalline cubic boron nitride abrasive has the ultrafine crystal structure of submicron dimension cBN monocrystal, and the micro-fragmentation self-sharpening effect and the isotropy of the binder-free polycrystalline cubic boron nitride abrasive overcome passivation, cleavage, anisotropy and other defects of monocrystalline cBN abrasives; and the binder-free polycrystalline cubic boron nitride abrasive disclosed in the invention has high hardness and strength, is suitable for high precision processing of high hardness quenched steel, especially electrical, electronic and optical devices, has very high social values and economic benefit, and is suitable for popularization and application.

The invention discloses a wind bell type friction nano-generator and a manufacturing method thereof, which belong to the technical field of self-energy supply. The wind bell type friction nano-generator includes a packaging chamber and a swing unit arranged in the packaging chamber. The packaging chamber is provided with an air vent thereon and an electrode therein. The electrode includes electrode layers oppositely arranged on the two inner surfaces of the packaging chamber. The swing unit includes a swing film and a friction film. One end of the swing film is connected with the top of the packaging chamber, and the other end is connected with the friction film to drive the friction film to swing. The friction film can contact the electrode layer during swing. The weak wind energy in theenvironment or the micro energy of human respiratory airflow can be fully converted into electrical signals and output, and the problem that the existing friction nano-generator is limited in usage scenario and cannot collect small wind energy is solved.

The invention discloses a liquid-phase sugar nano tellurium and a preparation method thereof. The liquid-phase sugar nano tellurium is a compound of sugar and nano tellurium obtained by reacting tellurite aqueous solution with the sugar by heating in the present of a reducing agent. The method comprises the following steps: adding the sugar to the tellurite solution, adding the reducing agent which is 50-100 times of the molar weight of the tellurite, and heating for reacting to obtain a product. The method is simple and feasible, and is applicable to industrialized production. The obtained product is more stable at normal temperature, thus realizing the storage of a nano tellurium elementary substance in a liquid phase, greatly widening the application range of the existing solid nano tellurium and reducing the use restriction thereof.

The invention provides a non-wood fiber biologic chemimechanical pulp production process for producing fulvic acid fertilizer by using pulp black liquor. The production process comprises the steps that non-wood fiber is taken as raw material, biologic chemimechanical pulp is adopted for pulping process, fulvic acid is extracted in multiple working procedures in the pulping process of chemimechanical pulp, the pulp black liquor is extracted, the black liquor rich in the fulvic acid component is collected, a secondary extraction is carried out, and the fulvic acid is obtained. The existing production of fulvic acid fertilizer by using pulp black liquor only involves the use of chemical pulping black liquor to produce fulvic acid fertilizer, but does not involve the use of chemimechanical pulp process to produce fulvic acid in pulp black liquor, thereby greatly limiting the non-wood fiber chemimechanical pulp with the utilization of straw resources and the development of resources, and beneficial development and breakthrough are required in both aspects of technology and practice. The non-wood fiber biologic chemimechanical pulp production process for producing fulvic acid fertilizerby using pulp black liquor has the advantages that the steps are simple, the operation is convenient, the practicability is strong, and the economic, ecological and social value is high.

The invention discloses a preparation method of a multi-layer circuit board for 5G communication and the multi-layer circuit board. The preparation method comprises the steps that a substrate is provided, a flow guide channel used for circulating a cooling medium is formed in the substrate, a first circuit layer and a second circuit layer are arranged on the top surface and the bottom surface of the substrate respectively, a plurality of through holes are drilled in the first circuit layer, the through holes sequentially penetrate through the first circuit layer, the substrate and the second circuit layer, the through holes are communicated with the flow guide channel, heat conduction columns are arranged in the through holes in a sealed mode so as to enable the first circuit layer and thesecond circuit layer to be electrically connected, the heat conduction columns make contact with cooling media in the flow guide channels, the flow guide channels of all the substrates of the multilayer circuit board are connected with the condensation unit through inlets and outlets to form cooling flow paths for the cooling media to flow, a first electronic component is arranged and a first solder mask layer is adhered at at least one first heat conduction column on the top surface of the multilayer circuit board, and a second electronic component is arranged and a second solder mask layeris adhered at a second heat conduction column, different from the first heat conduction column, on the bottom surface of the multilayer circuit board.

The invention relates to a multi-element co-doped visible-light-induced photocatalyst, which comprises the following steps: 1) preparing a titanium dioxide nanotube array; 2) preparing N-doped titanium dioxide nanotubes; 3) preparing C and N co-doped nitrogen-modified titanium dioxide nanotubes; and 4) preparing ferric oxide and carbon nitride co-doped nitrogen-modified titanium dioxide nanotubes.The photocatalyst has the functions of visible light excitation and catalytic degradation of organic pollutants, and also has the functions of easy separation from water and easy recovery.

The invention discloses an enterprise information analysis management system, which comprises a server, a classification storage module, a login module, an information classification subsystem, a background management subsystem and an information analysis subsystem, wherein the information analysis subsystem analyzes the information data of the enterprise, and transmits the analyzed data information to the information classification subsystem for classification and sorting. The invention is novel in design, simple in principle, easy to use; the information classification subsystem can carry onthe classification planning to the enterprise data information, store files with high similarities together, In this way, it can be convenient to access and read at any time, ensure the collation ofdata, avoid the problem that the data information is cluttered and difficult to find, set up the authority setting module, set different authorities according to different crowds, limit the use degreeof each person, facilitate the management, increase the security protection, and avoid the leakage of enterprise technology or privacy documents.

The invention belongs to the technical field of industrial kiln energy saving and discloses a double-circular-truncated-cone black body radiation energy saving element and preparation and applicationmethods thereof. The element comprises a bottom plate. A first hollow circular truncated cone and a second hollow circular truncated cone with top openings are arranged at the top of the bottom plate.The second circular truncated cone is located inside the first hollow circular truncated cone and coaxial with the first hollow circular truncated cone. A gap is reserved between the first hollow circular truncated cone and the second hollow circular truncated cone. The first circular truncated cone and the second circular truncated cone are made of refractory black body materials. The structureof the double-circular-truncated-cone black body radiation energy-saving element is proposed according to a satisfactory black body model principle and does not rely on the effect of a surface coating, the phenomena that the blackness of the black body element is decreased, and the radiation heat flow is reduced due to coating ageing are avoided, and the service life of the black body element is prolonged; and by means of the structural design of the double-circular-truncated-cone black body radiation energy-saving element, the heating furnace hearth radiation heat exchanging area is greatly increased and is approximately 1.5 times that of an ordinary black body element.

The invention relates to a movable dance mirror for dance rehearsal, which belongs to the technical field of dance training instruments, and comprises a plurality of combined mirror units arranged in a line, and a plurality of connecting components respectively and correspondingly arranged between the adjacent combined mirror units and used for realizing the connection of the plurality of combined mirror units; a plurality of dancing mirrors can be quickly combined and connected through connecting pipes and connecting grooves, the situation that the usability of the dancing mirrors is limited by sites and the number of people is avoided, and the flexibility of the dancing mirrors is improved; the dance mirror can be flexibly moved through guide wheels at the bottoms of the connecting pipes, and connecting screws not only fix adjacent bases, but also can fix the guide wheels; and the dance mirror is easy to operate, high in practicability and worthy of popularization.

The invention relates to a digital key authorization method, which comprises the steps that an authorized user encrypts authorization information and uploads the authorization information to a cloud platform, wherein the authorization information comprises vehicle information and authorized person identity information; the cloud platform decrypts the authorization information sent by the authorized user, establishes a contact between the authorizer and the authorized person, and stores the authorization information in the cloud platform; the cloud platform issues inquiry information to a user terminal of the authorized person, and if the authorized person accepts authorization, user terminal equipment information of the authorized person is encrypted and uploaded to the cloud platform; and the cloud platform decrypts the user terminal equipment information sent by the authorized person, generates a digital key and issues the digital key to the user terminal of the authorized person. Compared with the prior art, the method has the advantages that bicycle borrowing operation can be conveniently and quickly performed through digital key authorization, authority information, use dates and use times are limited, risks and troubles of bicycle borrowing are well solved, the problem of key returning is avoided, and user experience is good.

The invention discloses a management system for monitoring a shared bicycle parking situation, comprising a slot, a plug-in piece, an accommodating cavity, an infrared correlation detector, a management module, a controller. The slot is arranged at a handle on the right side of a shared bicycle; the plug-in piece is arranged on the end portion of the handle on the right of the shared bicycle; theinfrared correlation detector is used for sending a detection signal in the case that an infrared receiver cannot receive an infrared signal sent out by an infrared generator; the controller is used for sending a notification message to a smart phone; the management module is used for finishing the transaction after receiving the notification message and controlling a sound player to send a promptvoice if the controller has received a locked signal of a locking structure but does not receive a detection signal of the infrared receiver; and the controller is used for controlling an LED illuminating module to illuminate in the case that the detection signal of the infrared receiver is not received. The management system for monitoring a shared bicycle parking situation can limit the behavior of a user using the shared bicycle, thereby realizing the management of orderly parking of the shared bicycles.

The invention discloses an active lubricating structure of a differential mechanism with a differential lock, which comprises a gearbox shell, a differential mechanism bearing support, a first shaft hole arranged on the differential mechanism bearing support, a differential mechanism bearing and a differential mechanism, the differential mechanism comprises a differential mechanism shell with second shaft holes formed in the two ends, a half axle gear, a planetary gear assembly, a differential lock assembly and a sun wheel shaft. A shell oil duct is arranged on the gearbox shell, bearing support oil ducts are arranged on the differential bearing supports, and outlets of the bearing support oil ducts are connected with the first oil cavity. An annular gap between the sun wheel shaft and the second shaft hole forms a differential oil duct which is connected with the interior of the first oil cavity. A half axle gear oil duct is arranged on the half axle gear, a bearing oil duct is arranged on the differential mechanism shell, and a differential lock oil duct is arranged on the differential mechanism shell. By arranging the lubricating oil channels, active lubrication of all assemblies of the differential mechanism is achieved, and the technical problems that in the prior art, passive splash lubrication is adopted, lubrication is insufficient, and early abrasion is likely to be caused are solved.

The invention relates to a heating pipe positioning structure of a pipeline heater for an instant drinking water heating device. The heating pipe positioning structure of the pipeline heater for the instant drinking water heating device comprises the pipeline heater which comprises a water guide pipe and a heating pipe. The water guide pipe comprises a water inlet, a pipe cavity and a water outlet. The heating pipe is arranged in the pipe cavity of the water guide pipe. The heating pipe is used for heating water flowing through the pipe cavity of the water guide pipe, and the heating pipe is provided with a conductive end. The conductive end of the heating pipe extends out of the water guide pipe. A positioning block is arranged in the pipe cavity of the water guide pipe and used for clamping the heating pipe so that the heating pipe in the water guide pipe can be clamped and positioned in the water guide pipe by the positioning block. According to the heating pipe positioning structure, by simply arranging the positioning block at one end of the heating pipe into the water guide pipe, the end, in the pipe cavity, of the heating pipe is clamped and positioned in the water guide pipe by the positioning block, and the defects that the heating pipe swings in the pipe cavity and even impacts the pipe wall are overcome. In addition, the heating pipe positioning structure is simple and reasonable in structure and easy to implement, the end, in the pipe cavity, of the heating pipe is well protected, and the defects of deformation, damage, electric leakage and the like caused when the heating pipe impacts the pipe wall are overcome.

The invention discloses a surface alloying method for improving the water corrosion resistance of refractory metal molybdenum. The method comprises the following steps of preparing an experimental sample and performing ion irradiation, preparing an irradiation experimental sample by a powder metallurgy method, putting the sample into an irradiation cavity with high vacuum degree, irradiating the surface of the sample by Nb ions at 30-100 DEG C, selecting the dosage of 2-4 * 10<16>ion/cm < 2 >, the acceleration voltage of 300-400 KeV, and the average atom dislocation energy of 25-35 eV, and obtaining a surface-alloyed molybdenum sample; and carrying out XRD, microhardness, electrochemical potentiodynamic polarization and impedance test on the surface-alloyed sample, and detecting and evaluating the phase, mechanical properties and corrosion resistance of the sample before and after irradiation. The refractory metal molybdenum treated through the method has good corrosion resistance, the failure life of molybdenum in a high-temperature water medium is greatly prolonged, and scientific guiding significance is provided for application of molybdenum and alloy of molybdenum in the nuclear power field.