144results about How to "Does not change the structure" patented technology

The invention relates to composite hydrogel and a preparation method thereof. The composite hydrogel is hydrogel which takes a three-dimensional fiber network material as a skeleton, that is, the hydrogel comprises a three-dimensional fiber network material, wherein the three-dimensional fiber network material is a network structured material made of tingled fiber. As the three-dimensional fiber network material of the composite hydrogel is directly combined with the hydrogel, the purpose of strengthening the hydrogel can be achieved without changing the structure of the hydrogel self. Compared with a loosened and porous structure inside the hydrogel, the three-dimensional fiber network structure is dense, and medicines and active factors in the hydrogel can be densely coated, so that a slow-release effect can be achieved, the release velocities of the medicines can be reduced, and the utilization rates of the medicines can be increased.

The invention relates to a method for preparing an antimicrobial polysulfone ultrafiltration membrane, which comprises the following steps: preparing a reaction solution containing an initiator, a capsaicin and a hydrophilic monomer, putting a pretreated polysulfone ultrafiltration membrane into the reaction solution for reaction of 0.32-8 hours, and modifying the surface of the pretreated polysulfone ultrafiltration membrane to obtain the antimicrobial polysulfone ultrafiltration membrane. The capsaicin is acrylamide with the derivative structures of capsaicin, the hydrophilic monomer is acrylamide, acrylic acid, methacrylic acid, hydroxyethyl acrylate or p-vinyl benzenesulfonic acid containing olefinic double bonds and hydrophilic groups, and the reaction solution is the mixture of an organic solvent and water. The flux of the ultrafiltration membrane prepared by adopting the method is more than 100L / (m<2>.h), and the ultrafiltration membrane can retain more than 93% of bovine serum albumin and can resist more than 85% of colon bacillus and more than 80% of staphylococcus aureus. The method is easy to operate, and the antibacterial and pollution-resisting properties of the ultrafiltration membrane are improved significantly. The prepared ultrafiltration membrane can be applied to the fields of industrial wastewater treatment, seawater desalination, etc.

The invention discloses an intelligent medical service method based on undistinguishable confusion, which is characterized in that a data owner independently decides allocation for the medical data access authority through carrying out security symmetric encryption on medical information uploaded to a cloud server; a medical data analysis mechanism carries out confusion on a medical data analysis program by using an undistinguishable confusion technology, the confused program is deployed to the cloud server, and security analysis is carried out on the medical data by using a confusion program so as to acquire a correct medical analysis result; and the access authority of other related mechanisms for a ciphertext can be controlled conveniently without changing the ciphertext structure by using a key sharing scheme. According to the invention, the privacy of data is realized, interaction of keys is reduced, and storage and management of a great number of keys are avoided; the integrity and the effectiveness of data can be verified; and the access type of medical data is decided by the user, the overall structure of an algorithm is not change at the same time, and the expansibility of the scheme is enhanced.

The invention provides a rapid switch-off system applied to photovoltaic generation, relates to the field of photovoltaic generation, and specifically relates to a rapid switch-off system with high security and reliability and applied to photovoltaic generation. The rapid switch-off system is connected to a photovoltaic module array in series and comprises rapid switch-off photovoltaic junction boxes, the photovoltaic module array comprises a plurality of photovoltaic modules, the plurality of photovoltaic modules are connected in series and conveyed to an alternating current power grid through a combiner / inversion box, an alternating current distribution system is arranged between the alternating current power gird and the combiner / inversion box, the rapid switch-off photovoltaic junction boxes are connected in series between the adjacent photovoltaic modules and used for switching off the photovoltaic modules, the alternating current distribution system comprises a main switch and a slave switch, the main switch is arranged between the alternating current power grid and the combiner / inversion box, the slave switch comprises a power supply converter, a manual switch and an automatic switch, the automatic switch and the manual switch are separately connected with the power supply converter, and the power supply converter is connected with the rapid switch-on photovoltaic junction boxes. The system is advantaged by high security and good stability.

The present invention provides a robust adaptive filtering and state estimation method based on Huber estimation. Firstly, an estimation value is calculated through estimating an upper bound of a covariance matrix of a one-step prediction dual-uncertainty system in an online way, only a time updating process is modified, at the same time a method of a linear matrix inequality is used to carry out adaptive parameter adjustment, and an adaptive traceless information filter for an uncertainty model is obtained. Then the matrix inversion theorem is applied and a Huber estimation method is used to modify a measurement update process, and a final estimation value is obtained. The precision of filtering and state estimation is high, and the stability is good. According to the robust adaptive filtering and state estimation method, a filtering and state estimation problem of a dual-uncertainty unmanned ship is solved, the advantages of an information filter structure are retained, the precision and stability of filtering and state estimation are improved, and the calculation is simple and the application is convenient.

The invention provides a doping modified sodium vanadium fluorophosphates positive electrode material and a preparation method thereof. The positive electrode material is represented by a general formula of Na(1-x)KxVPO4F, wherein x is more than or equal to 0 and less than or equal to 0.15. The preparation method disclosed by the invention comprises the following steps: mixing and dissolving various raw materials into deionized water to realize uniform mixing on a molecular level; freezing, and performing freeze-drying treatment to prepare a powdered material having the characteristics of excellent dispersion property, light particle aggregation and the like; and calcining twice at a medium temperature and a high temperature, thereby obtaining the doping modified sodium vanadium fluorophosphates positive electrode material with the advantages of being loose and porous, fine and uniformly distributed in particle system, high in purity and excellent in charge and discharge performance.

The invention relates to making method for compound material of entrapment iron liquid and neutrality phosphor extraction agent. The compound material is made up from fixing iron liquid and neutrality phosphor extraction agent into silicons, titania or alumna inorganic network to form a new type organic-inorganic hybridization material. And the iron liquid is 1, 3-dialkyl imidazole salt that the anion section is fluoboric acid radical and fluorophosphoric acid radical. The neutrality phosphor extraction agent is the compound that the three hydroxyls in orthophosphoric acid molecule are fully be replaced or esterified. The method could shorten reaction time. It could be used to effectively separate yttrium and heavy rare earths, and could be recycled.

The invention discloses a ketone-removing additive for removing ketone substances from packaging card paper, and application of the additive. The ketone-removing additive comprises organic amine and a catalyst, wherein the organic amine is one or more of ethanediamine, propane diamine, butanediamine, ethanolamine, guanidine and dimethyl biguanide; the catalyst is one or more of acetic acid, propionic acid, citric acid and malic acid; the mass ratio of the organic amine to the catalyst is 1.5: 1 to 2.5: 1. The ketone-removing additive is added into a water dispersible coating solution containing acrylic resin at room temperature to obtain a water-based coating solution, wherein the mass percent of the ketone-removing additive in the coating solution is 0.5%-5.0%. The water-based coating solution is used for removing the ketone substances from the packaging card paper. An experiment shows that the water-based coating solution can be used for effectively removing the ketone substances from the packaging card paper. The water-based coating solution is low in production cost, cannot change the structure and the characteristics of the paper in a ketone removing process, and cannot influence the subsequent processing process of the packaging card paper.

The embodiment of the invention provides a method for adding an elevator in the existing building. The method comprises the following steps: selecting an outer building wall at the scissors stair platform of the existing building as an elevator shaft mounting position, mounting an elevator shaft base at the bottom of the mounting position, erecting a steel frame structure above the elevator shaft base, and mounting an elevator car in the steel frame structure. The method does not affect the normal life of existing residents and can also realize the transportation function of the elevator.