99results about How to "Retain the advantage" patented technology

The invention provides a multi-mode tower-type solar thermal power generating device. A special ceramic solar energy receiver is adopted, quicksand is used for replacing heat transferring and storing media such as heat-conducting oil and fused salt, and supercritical carbon diode Bretton thermal power generation can be achieved by means of sensible heat and high-temperature radiation carried by the quicksand. On the basis of innovating the fused salt heat storing technology, the power generating device complements the technologies of organic Rinkine thermal power generation, lithium bromide air-conditioning, biomass energy and the like, and a bold attempt is made in the aspects of reducing the cooling water and the cost, prolonging power generation hours and expanding the use range, the technological base is laid for replacing fossil energy power generation finally. The device belongs to the technical field of solar thermal power generation.

The invention belongs to the technical field of microscopicspectral imaging detection, and relates to a split pupil laser differential confocal Raman spectrum test method and device. According to the test method and device, a split pupil laser differential confocal microtechnique and a laser Raman spectrum detection technique are organically combined, precise imaging of three-dimensional geometrical positions is realized through segmentation focal spot differential detection, the optical path structure of a traditional differential confocal microscopic system is simplified, advantages of an original laser differential confocal system and a split pupil confocal system are inherited, and multi-mode switching and processing of split pupil laser differential confocal microscopic detection, laser confocal Raman spectrum detection and laser differential confocal Raman spectrum detection can be realized only through softwareswitching processing. The test method and device provide a new technological approach for detection ofnanoscale microcell three-dimensional geometrical positions and spectrum, can be applied to fields of biomedicine, industrial precision detection and the like, and has the broad application prospect.

The invention discloses an integrated tower solar thermal power generation unit employing quicksand to store and transfer heat, and a tower solar thermal power generation unit built by 'quicksand' instead of conduction oil, fused salt or gas and the like to transfer and store heat. The device adopts fluid characteristics of the 'quicksand', and has the characteristics of thermostability, zero pressure, small thermal resistance and low cost of the 'quicksand'; and superheated steam is generated by sensibile heat and high-temperature air carried by the quicksand when flowing through a vapor generator to push a steam turbine generator to generate electricity, therefore, the construction cost of a tower solar thermal power generation unit is reduced by integral design, and a technological base is established for final implementation of parity power generation. The device belongs to the technical field of solar thermal electric power generation.

The invention discloses a questioning and answering method and device for an open domain of fusing external knowledge. The method comprises the steps that according to a vision problem, discretized external knowledge represented by an explicit expression is extracted from a preset knowledge graph, and the vision problem comprises image information and a problem text; through a knowledge embedded mode maintained by a structure, the discretized external knowledge is embedded in semantic space represented by an implicit expression to obtain a high-dimensional continuous spatial vector; through adynamic memory network and an attention mechanism, auxiliary inference knowledge representation extraction is conducted on the high-dimensional continuous spatial vector, and an image feature is fusedto obtain the answer of the vision problem. According to the method, the superiority of a deep neural network model is kept, a large amount of structural external knowledge is introduced to assist inanswering the vision problem of the 'open domain', the dynamic memory network and the memory mechanism are utilized, the knowledge representation of effectively assisting inference is obtained, and therefore the reliability and effectivity of vision questioning and answering are effectively improved.

The invention provides a DOA estimation method under array element failure based on a matrix filled nested array. The method comprises that a reception signal covariance matrix of a virtual optimization array is calculated according to a reception signal x(t) of the nested array, the reception signal covariance matrix of the virtual optimization array is expanded into a covariance matrix of a uniform array, and a convex optimization problem in complementing zero elements in the covariance matrix of the uniform array is established, and on the premise that the non-zero elements in the covariance matrix of the uniform array are not changed, the sum of singular values of the covariance matrix of the uniform array is minimized; a fixed point prolongation algorithm in matrix filling is used tosolve the convex optimization problem to obtain an optimal value RV; and characteristic decomposition is carried out on the optimal value to obtain a noise subspace, a MUSIC score is constructed, andDOA estimation is realized by spectrum peak searching. DOA estimation is carried out by using all virtual element arrays in the sparse array, advantages of the nested array itself are reserved, and the matrix filling algorithm is used to fill more element arrays to carry out DOA estimation.

The invention discloses a cross-platform mobile office system based on a cloud end. The system comprises a register and login module, a company public information and personnel resume module, an enterprise authentication and personal real name authentication module, an enterprise organization structure and authority management module, a message push and instant messaging interface adapter module, an office system platform access interface adapter module, an office system industry matching module, an account password-free login authorization interface module and a database adaption module. The register and login module is used for enabling enterprises and individuals to register and log in the mobile office system; the company public information and personnel resume module is used for displaying and searching company public information and personnel resume information; and the enterprise authentication and personal real name authentication module is used for real name authentication of the enterprises and the individuals. The mobile office system is based on the cloud end and can be in cross-platform use; and the office system is high in timeliness and can realize quick and efficient office work.

The invention discloses a mirror-like surface 3D shape measuring method based on Kinect and fringe reflection. The method is composed of two key parts: 3D point cloud data acquisition based on Kinect, and 3D measurement based on fringe reflection. The advantages of the method are as follows: (1) the traditional 3D measurement based on fringe reflection can be used to measure simple standard shapes only, while the mirror-like surface 3D shape measuring method based on Kinect and fringe reflection is not restricted by surface shapes to be measured, and can be used to measure objects of any surface shapes; and (2) in the mirror-like surface 3D shape measuring method based on Kinect and fringe reflection, preliminary 3D contour information of the surface of an object to be measured is obtained by collecting 3D morphology point cloud data of the surface of the object to be measured through Kinect, and the preliminary 3D contour information is used as an iteration datum plane of wave-front reconstruction in the traditional 3D measurement based on fringe reflection, so that the number of iterations is reduced greatly, and the speed of 3D surface shape reconstruction is increased.

The invention discloses a gas drilling underground motor drilling tool. The gas drilling underground motor drilling tool comprises a double-acting compressed air power short section, a double-acting hydraulic power short section, a closed circulating hydraulic motor and a liquid separation air discharging transmission short section, which are sequentially connected with one another in a threading manner, and a chamber of each part is sealed through a sealing pad after being aligned to one another; a sealing pad d is arranged between the double-acting hydraulic power short section and the closed circulating hydraulic motor. By adopting the gas drilling underground motor drilling tool, the gas energy can be converted to high-pressure hydraulic energy, the rotor is driven to rotate through the closed cycling of hydraulic oil inside a volume-type motor, the power insufficiency caused by the compression when the gas energy is directly used for driving the motor can be overcome, all advantages for adopting the gas as the cycling medium also can be maintained, and the underground power problem of a gas drilling horizontal well, a directional well and a large-displacement well can be effectively solved.

The invention belongs to the technical field of surface topography measurement, and discloses a method and a device for fluorescence interference microscopic measurement based on stimulated radiation. The method includes: firstly, coating surfaces of a measured piece and a reference mirror; secondly, subjecting the measured piece and the reference mirror to stimulation of monochrome detection laser; and finally, resolving interference fringes on a detection surface. The device a laser device, a converging objective lens, a first pinhole, a collimation and beam expanding objective lens, a beam splitting prism, a reference focusing objective lens, the reference mirror, a displacement driver, a detection focusing objective lens, the measured piece, an imaging converging objective lens, a narrow-band filter, a second pinhole and a detector, wherein the converging objective lens, the first pinhole, the collimation and beam expanding objective lens, the beam splitting prism, the reference focusing objective lens, the reference mirror and the displacement driver are disposed on a direct light path of the laser device along a light transmitting direction, the detection focusing objective lens and the measured piece are disposed on a reflected light path of the beam splitting prism, and the imaging converging objective lens, the narrow-band filter, the second pinhole and the detector are disposed on a transmission light path of the beam splitting prism. By the design that surfaces of the measured piece and the reference mirror are coated by the aid of a vacuum evaporation coating method, measurement light is guaranteed to be capable of returning to a detection system after being reflected by a measured surface, high-NA(numerical aperture) and high-slope surface detection is achieved, and the device is applicable to ultra-precise measurement of three-dimensional topographies of high-NA and high-slope spherical surfaces, aspheric surfaces and free-form surfaces.

The invention discloses a cement water-permeable concrete ground structure with water-permeable asphalt on the surface. The structure comprises components of, from top to bottom: an asphalt water-permeable concrete layer, a spacer layer, a cement water-permeable concrete layer, a bedding layer and a base layer. A manufacturing method of the ground structure comprises steps that: (1) the base layer is paved; (2) the bedding layer is paved on the base layer; (3) at least one cement water-permeable concrete layer is paved on the bedding layer; (4) a water-permeable spacer layer is paved on the surface of the cement water-permeable concrete layer, and is optional; and (5) at least one asphalt water-permeable concrete layer is paved on the cement water-permeable concrete layer or the spacer layer. The manufacturing method also comprises a step (6), which is a maintenance step. The cement water-permeable concrete ground structure with the water-permeable asphalt on the surface is an environment-friendly ground structure.

The invention relates to an amphiphilic polymeric prodrug for reducing and releasing an original drug and a preparation method thereof. The method has the advantages of a wide range of applicable medicines, easy availability of raw materials, high yield, high purity and the like. A hydrophilic polymer and a hydrophobic drug in the amphipathic polymeric prodrug are linked through a connecting arm containing a self-disrupting disulfide bond, and the disulfide bond breaks and undergoes molecular rearrangement in a tumor cell reducing environment. An original drug molecule is released to ensure activity of the drugs, and can self-assemble into nanomicelles in an aqueous medium, and is expected to achieve long-term circulation in vivo and increase accumulation in tumor tissues, thereby achieving purposes of improving drug efficacy and reducing toxic and side effects.

The invention discloses a millimeter wave broadband high efficient transistor stacked power amplifier comprising an input match network, a first grid source feedback stacked amplification network, a second grid source feedback stacked amplification network, a self-bias potential-divider network and an output match network. According to the amplifier provided by the invention, the grid source feedback stacked amplification network is used, so that the phenomenon that the traditional transistor stacked structure amplifier is instable in millimeter waves is inhibited, and thus the grid source feedback stacked amplifier can achieve the good matching of power and efficiency; and meanwhile, the amplifier can also achieve impedance match, and has the advantages of high efficiency, high output power, high power gain and small area.

The invention discloses a multilayer fluidized bed gasification furnace for preparing a methane-rich gas by coal gasification. The multilayer fluidized bed gasification furnace comprises a gasification furnace shell, at least two layers of gas distributors, a raw material inlet, a clinker outlet, a gasification agent inlet, a coal gas outlet, a first overflow device and a second overflow device, wherein the gas distributors are perpendicular to a longitudinal axis and arranged at different heights along the longitudinal axis in a perforated plate form to partition the internal space into an upper space, a middle space and a lower space; the clinker outlet and the gasification agent inlet are positioned at the bottom of the shell; the coal gas outlet is positioned on the top of the shell; and the first overflow device and the second overflow device are penetrated into the first gas distributor and the second gas distributor respectively and each of the first overflow device and the second overflow device is tubular, and has two open ends, so that a raw material flows from the upper space to the middle space through the first overflow device along a curved line and then flows to the lower space from the middle layer through the second overflow device.

The invention discloses a human face recognition method. the method comprises steps: (1) a data set is built for each pixel of a human face image, wherein the data set is composed of the gray value of the pixel and gray values of adjacent 8 pixels; (2) by using the adjacent 8 pixel gray values and in combination with the maximum likelihood estimation method, standard deviation parameters in a Gauss density function with the pixel gray value as a mean value are estimated; (3) the ratio of the standard deviation estimation value to the pixel gray value is calculated, an arc-tangent function is used for converting the ratio, and the converted value is the pixel illumination invariant feature; (4) all pixels of the human face are traversed to obtain a human face feature image based on the local standard deviation illumination invariant feature; (5) feature extraction is carried out on the human face feature image; and (6) the extracted features are classified to complete human face recognition. The method of the invention can overcome influences on the human face recognition rate by illumination changes, and has the advantages of low algorithm complexity, strong feature extraction ability and the like.

The invention belongs to the technical field of surface topography measurement and relates to a stimulated radiation based Mirau fluorescence interference microscopic measurement device. The measurement device comprises a laser device, a converging objective lens, a first pinhole, a collimation and beam expanding objective lens, a beam splitter, a focusing objective lens, a displacement driver, a reference mirror, a beam splitting prism, a measured piece, an imaging converging objective lens, a narrow-band filter, a second pinhole and a detector, wherein the converging objective lens, the first pinhole, the collimation and beam expanding objective lens and the beam splitter are disposed on a direct light path of the laser device along a light transmitting direction, the focusing objective lens, the displacement driver, the reference mirror, the beam splitting prism and the measured piece are disposed on a reflected light path of the beam splitter, and the imaging converging objective lens, the narrow-band filter, the second pinhole and the detector are disposed on a transmission light path of the beam splitter. Surfaces of the measured piece and the reference mirror are coated by the aid of a vacuum evaporation coating method. By the design that surface properties of the measured piece are changed through coating, measurement light is guaranteed to be capable of returning to a detection system after being reflected by a measured surface, high-NA(numerical aperture) and high-slope surface detection is achieved, and the measurement device is applicable to ultra-precise measurement of three-dimensional topographies of high-NA and high-slope spherical surfaces, aspheric surfaces and free-form surfaces.

The invention discloses a wild boar feeding method. The method comprises the steps of introduction and domestication, feeding site construction, and feeding management at different stages; the method from the selection of boars and breeding sows targets specifically for the wild boars to build the feeding sites, the boars and sows are differently fed and managed, the wild boars are fed according to the scientific law, the survival rate of the wild boars is greatly improved, the prepared wild boar meat is delicious, the lean meat rate reaches 80% or above, the traditional pigs however are too poor in quality, have too much fat, and have no market competitiveness, the economic benefit of selling the wild boar meat is better, and the wild boar feeding method has broad market prospect through popularizations.

The invention discloses a modeling method for an improved polynomial model suitable for vertical total electron content modeling of a regional ionized layer. The method comprises the following steps of S1, obtaining puncture point geographic longitude and latitude information of a regional observation point and vertical total electron content information of the ionized layer at the corresponding moment; S2, performing conversion through known data to obtain information of solar hour angle difference, geomagnetic latitude and local time; S3, selecting model parameters, constructing an equation of a calculation amount and the selected parameters, and building a vertical total electron content model of the regional ionized layer; and S4, calculating improved polynomial model parameters through a least square method, thereby finishing the building of a vertical total electron content correction model of the regional ionized layer. According to the method, the advantage of a conventional polynomial fitting model in spatial curved surface fitting is well reserved, the characteristic of nonlinear vibration, along with time, of delay information of the ionized layer is considered, and the space-time change characteristic of the regional ionized layer is better simulated; and compared with the conventional polynomial model, the precision is improved.

The invention discloses an improved pilot-frequency-based SIM-OFDM channel estimation method and belongs to the technical field of communication anti-interference. The method of finishing channel estimation by inserting a low-energy pilot frequency sequence to a silent subcarrier is provided for solving the technical problem that channel estimation is implemented difficultly through an existing SIM-OFDM communication method. According to the method, a receiving end inserts a pilot frequency sequence with any energy to a silent subcarrier; the receiving end conducts unified processing on a plurality of received signals, the average channel frequency domain response is obtained based on the formula shown in the specification, the primary channel estimation values of the received signals are obtained based on the average channel frequency domain response, balancing is conducted on the received signals based on a current channel estimation value, pilot frequency position detecting is conducted, and then channel estimation is updated according to the pilot frequency position, pilot frequency data, frequency domain receiving signals at the pilot frequency position. The method is used for channel estimation in an SIM-OFDM system and data demodulation of the frequency domain receiving signals, the advantages of the SIM-OFDM system are remained, channel estimation can be conducted through the pilot frequency, and a basis is provided for a final detecting algorithm.

The invention belongs to the field of cognitive neuroscience, particularly relates to a question and answer method and system based on a brain-like semantic hierarchical memory reasoning model, and aims to solve the problem of small sample learning of natural language understanding tasks such as text generation and automatic question and answer. The method comprises the steps of acquiring and inputting a question text and an answer text; Performing time sequence pooling on the text to obtain a word vector matrix; Pooling the space and time of each word vector in the word vector matrix to obtain a binary word representation set of which each bit is 0 or 1 corresponding to the word vector; Performing brain-like learning on the text and the word set to obtain an optimized model; And independently inputting the question text, performing word reduction based on the cell prediction state in the model, obtaining an answer text, and outputting the answer text. According to the method, a semantic hierarchical time sequence memory model is combined, the model is constructed based on a learning mode of small sample data and knowledge reasoning, the requirement for the number of samples is low, a large number of parameters do not need to be adjusted, and the expandability of the model is improved.

The invention relates to the field of SAPO-34 molecular sieves, and discloses an SAPO-34 molecular sieve aggregate, a preparation method thereof and a method for preparing olefin from methanol. The preparation method comprises the following steps of: (1) carrying out hydrothermal crystallization on a solution obtained by mixing an aluminum source, a phosphorus source, a silicon source, triethylamine, triethylamine hydrochloride and water; wherein in the solution, when Al2O3 is taken as the aluminum source, P2O5 as the phosphorus source, and SiO2 as the silicon source, the molar ratio of the aluminum source to the phosphorus source to the silicon source to triethylamine to triethylamine hydrochloride to water is 1: (0.9-1.1) : (0.1-0.5) : (1.5-3) : (0.1-0.5) : (15-50) ; (2) carrying out solid-liquid separation on the product obtained by hydrothermal crystallization in step (1), and washing, drying and roasting the obtained solid to obtain the SAPO-34 molecular sieve aggregate. The aggregate can be used as a catalyst in a reaction to prepare olefin by using methanol to improve the selectivity of the low-carbon olefin, inhibit the generation of carbon deposit and prolong the service life of the catalyst.

The invention discloses a variable structure combined LLC resonant converter. The converter comprises a direct current source, a square wave generator, a combined resonance circuit, a combined transformer, a combined rectification filter circuit and a load, wherein the combined resonance circuit includes a first LLC resonance circuit and a second LLC resonance circuit; the combined transformer includes a first transformer and a second transformer; the direct-current source is connected with the square-wave generator; the square-wave generator is connected with the combined resonance circuit, the combined resonance circuit is connected with a primary side of the combined transformer, and a secondary side of the combined transformer is connected with the combined rectification filter circuit; and the combined rectification filter circuit is connected with the load. According to the variable structure combined LLC resonant converter, four working modes can be combined and converted, a gain range of the converter can be widened, stable output can be guaranteed through mode transition, conduction losses are not increased due to the added rectifying device, and the advantages of the LLCresonant converter are reserved.

The invention provides an underwater small object multi-base fusion tracking method. The method includes a step 1 of resampling an object measurement set Zk of a multi-base system at a tk moment and obtaining a resampling random particle set; through quantization and fusion treatment of distribution of the resampling random particles, obtaining equivalent measurement zk at the tk moment; a step 2 of estimating the small object state at the tk moment through mixed particle filtering, wherein the mixed particles includes predication particles which are random particles at the tk moment obtained through predication with random particles at the tk-1 moment and target volume measurement sampling particles obtained through measurement according to the random sampling according to the equivalent measurement zk and prior probability distribution; and resampling the mixed particles; a step 3 of making k=k+1 and turning to the step 1 until object tracking is finished. By adopting the method provided by the invention, tracking precision of multi-base underwater small objects is improved.

The invention discloses a radar transmitter state evaluation method based on fuzzy comprehensive evaluation and comprehensive weighting, and the method comprises the following steps: defining a radar transmitter state evaluation index set of first-stage and second-stage state evaluation indexes, and defining a state evaluation set comprising five health levels; the relative deterioration degree is adopted to represent the deviation degree of the evaluation index data and the index data in the normal state, and relative deterioration degree calculation processing is carried out on the original data of each evaluation index; a K-order parabolic membership function is adopted as a membership function of fuzzy comprehensive evaluation, and a corresponding membership matrix is solved; judging the weight of the fuzzy comprehensive judgment by adopting a comprehensive weighting method; and integrating the determined evaluation set membership matrix and the health level membership matrix by using a fuzzy comprehensive evaluation method, integrating the health state and the weight vector of the first-level state evaluation index, and determining an overall state evaluation result of the radar transmitter. According to the invention, the problems of simple function, single technology and high false alarm rate of radar fault detection are solved.

The invention provides a self-cooling injection burner. The self-cooling injection burner comprises a mixing tube, a combustion head and a nozzle. The mixing tube is provided with an air inlet end and an air outlet end. The nozzle is arranged at the air inlet end and used for spraying fuel into the mixing tube and further sucking external air into the mixing tube under the injection action. The combustion head is arranged at the air outlet end and used for combusting a mixture of the fuel and the air. The injection burner further comprises an air flow channel guiding the sucked-in air to flow. The air flow channel extends to the air inlet end of the mixing tube from the periphery of the combustion head, so that the combustion head is cooled before the sucked-in air arrives at the air inlet end of the mixing tube. Due to the fact that the air used for combustion supporting is led into the combustion head to be used for combustion supporting again after cooling, the advantages of the injection burner are reserved, and meanwhile the cooling effect of the combustion head is improved; and combustion stability is improved, the service life of the combustion head is prolonged, and radiation to the environment by the combustion head is reduced.

The invention discloses a downhole power drilling tool for gas drilling, which comprises a double-acting compressed air power sub-joint, a double-acting hydraulic power sub-joint, a closed circulation type liquid drive motor and a liquid-isolated and exhaust-driven sub-joint. Double-acting pneumatic power sub-joints, double-acting hydraulic power sub-joints, closed cycle liquid-driven motors, and liquid-isolation and exhaust transmission sub-joints are sequentially connected by threads, and the chambers of each part are aligned and sealed by gaskets; the gasket d is set at Between the double-acting hydraulic power nipple and the closed circulation hydraulic drive motor. The invention can convert gas energy into high-pressure liquid energy, and drive the rotor to rotate through the closed circulation of hydraulic oil in the volumetric motor, which overcomes the lack of power caused by the compressibility when the gas directly drives the motor, and also retains the gas as a cycle All the advantages of the medium effectively solve the downhole power problem of gas drilling horizontal wells, directional wells and extended reach wells.

The invention provides a molding and foaming process of a macromolecule with supercritical rapid swelling through mold pressing. The problem of low production efficiency of supercritical foaming materials due to the long contact penetration time between polymers and gas during supercritical mold pressing foaming is solved. Supercritical fluid and a polymer melt can be mixed quickly and evenly through mechanical stirring of a screw in a charging cylinder of an injection molding machine, and after a homogeneous solution is injected from the injection molding machine to a mold cavity, through regulation of the temperature and further diffusion of the supercritical fluid, regulation of the melt strength before foaming and further increasing of the gas solubility can be achieved. A two-step grading method of melt blending and solid swelling foaming can ensure rapid diffusion and swelling of the supercritical fluid in a polymer matrix, the advantages of mold pressing foaming products are remained, meanwhile, the problem of the too long swelling time caused by gas diffusion in existing mold pressing foaming processes is solved, the production efficiency of mold pressing foaming is significantly improved, and industrialization of supercritical mold pressing foaming is further promoted.

The invention relates to a spectral pupil laser confocal Brillouin-Raman spectrum measuring method and device and belongs to the technical field of microscopy spectral imaging. The device comprises a light source system for generating stimulating light beams, a measuring objective lens, a lighting pupil, a collecting pupil, a dichroic light splitting device, a spectroscope, an Raman spectrum detecting device, a Brillouin spectrum detecting device, a spectral pupil laser confocal detecting device, a three-dimensional scanning device, a displacement sensor and a data processing unit. The method and the device provided by the invention has the advantages that the abandoned rayleigh scattering light in confocal Raman spectrum detection is utilized to build a spectral pupil confocal microimaging system to realize the high-resolution imaging of the three-dimensional geometric position of a sample, the basic property and multiple cross effects of a substance are obtained by detecting the abandoned brillouin scattering light in confocal Raman spectrum detection and further the stress, elastic parameters and density of a material can be measured; the advantages of the confocal Raman spectrum detection technology and the confocal Brillouin spectrum detection technology are utilized to complement each other, and the comprehensive measurement and decoupling of multiple property parameters of the material are realized.

The invention discloses an anti-stroke medicinal composition, a tablet and preparation methods thereof. The method comprises the following steps of: adding 70 percent ethanol into szechuan lovage rhizome and Chinese angelica serving as raw medicinal materials in an amount of 10 times the total amount of the raw medicinal materials for the first time, putting into an extraction tank, extracting atthe temperature of 70-100 DEG C for 2 hours, filtering an extracting solution out to obtain a first extracting solution, and filtering solid filter residues out for later use; adding 70 percent ethanol into the solid filter residues in an amount of 8 times the total amount of the solid filter residues, putting into the extraction tank, extracting at the temperature of 70-100 DEG C for 1.5 hours, filtering an extracting solution out to obtain a second extracting solution and solid residues; mixing the extracting solutions, concentrating the mixed solution under reduced pressure at the temperature of 60-70 DEG C till alcohol taste disappears to obtain an extracted concentrate, wherein the relative density of the concentrate is 1.10-1.30, and the density is measured at the temperature of 60 DEG C; and adding smashed natural borneol into the extracted concentrate for dissolving to obtain a medicinal composition, wherein the medicinal composition comprises the following medical materials in parts by weight: 10-50 parts of szechuan lovage rhizome, 50-10 parts of Chinese angelica and 1-10 parts of natural borneol. The obtained composition plays remarkable a role in repairing impairment of stroke and cranial nerve functions.

Plant phytosterol compositions are modulated in transgenic plants to confer resistance to insects, nematodes, fungi, and / or other environmental stresses, and / or to improve the nutritional value of the plants. Recombinant DNA molecules of the invention encode RNA or protein sequences capable of altering plant sterol profiles by affecting the expression or activity of sterol biosynthetic enzymes. The DNA molecules are transformed into plant cells and plants having altered sterol compositions are regenerated therefrom.

The invention relates to a reduced response-type amphiphilic polymer prodrug and a preparation method and an application thereof. The prodrug has a molecular structure as a formula I, wherein X is O or NH, ROH is a hydrophobic antitumor drug, n is from 5 to 1,000, and m is 1 or 2. The prodrug provided by the invention can achieve targeted administration, which not only retains the advantages of anano drug-loading system, but also exhibits the characteristic of specific degradation of a disulfide bond at the tumor site. Compared with conventional 2,2'-disulfanediyldiacetic acid, 3,3'-dithiodipropionic acid and other connecting arms, the prodrug and the preparation method thereof have the advantage that an anticancer drug with an original drug molecular form can be obtained without furtherhydrolysis.