41results about How to "Avoid overdependence" patented technology

The invention provides a method for realizing accurate train positioning by a GPS with the aid of a digital railway map. The train positioning method essentially comprises two subalgorithms, namely a GPS integrity monitoring algorithm and a train positioning calculating algorithm. The GPS integrity monitoring algorithm uses the establishment of a local coordinate system based on railways and transforms a WGS-84 coordinate to a new local coordinate system based on railways as well as uses geographic information provided by the digital railway map to establish a redundancy equation and a constraint condition so as to monitor the pseudo-range observed quantity of the GPS; the train positioning calculating algorithm is responsible for establishing a train position calculating model and a speed calculating model and integrating the two models to realize a train positioning calculating function. The train positioning method, provided by the invention, can not only effectively improve the precision and the stability of the train positioning when the GPS is complete, but also provide a train positioning result with comparatively high precision when the GPS is not complete.

The invention provides a recombinant lentiviral expression vector, and belongs to the technical field of cell engineering. The recombinant lentiviral expression vector comprises a 21mb gene, a 41BBL gene and an MICA gene which are sequentially connected in series; and the 21mb gene is obtained by sequentially connecting a signal peptide gene, an IL21 gene, a CD8 Hinge gene and a CD8 transmembranegene in series. After the provided recombinant lentiviral expression vector transfects a host cell, the host cell expresses the MICA and the 41BBL, and the IL21 is fused and expressed (but not secreted in a culture environment) on a cytomembrane of the host cell. After the provided recombinant lentiviral expression vector transfects the host cell, an obtained reconstitution cell promotes the highexpression of the NKG2D, avoids excessive activation of an NK cell and prolongs the proliferation time of the NK cell in the process of induction culture of the NK cell.

The invention relates to a method for generating a practical multidisciplinary design optimization model automatically, which comprises the following steps of: first, establishing an integrated product optimization model according to design requirements; second, filling in a 'correlation' matrix D according to the inclusion relation between functions and optimization variables in the integrated product optimization model; third, filling in a 'coupling' matrix C according to the inclusion relation among functions in the integrated product optimization model; fourth, filling in a 'time' matrix T according to time taken for calculating functions in the integrated product optimization model; fifth, carrying out automatic task division by a genetic algorithm according to the matrixes to obtain one main task and a plurality of subtasks; sixth, generating an MDO (Multidisciplinary Design Optimization) model according to the task division scheme. The method supports the computer based automatic generation of the MDO model, avoids the excessive independence on experience of designers, can obtain the most reasonable MDO model, and has the characteristics of good simplicity and practicality, wide application and the like.

The invention discloses a cooperative transmission method combined with higher-order domain network coding. The method is characterized in that at the first stage of transmission, each user transmits self information and simultaneously monitors information transmitted by other users; and at the second stage of transmission, each user utilizes coding vectors to carry out linear superimpose coding on packets monitored at the first stage and the self information on a high-order domain and then transmit the coded packets and information, and a receiving end utilizes a coded matrix to form packetscorrectly received to a linear simultaneous equation on the high-order domain so as to solve original data sent by the users. In the method disclosed by the invention, the cooperative transmission technology in a multi-user cooperative transmission system is combined with the higher-order domain network coding technology, thereby providing highly reliable insurance for uplink data transmission ofmulti users and effectively improving the cooperative transmission efficiency and the overall system performance.

The invention discloses a credit-based method and equipment for opening bin doors of self-service vending equipment, and belongs to the technical field of intelligent equipment. The method comprises the steps that a door opening credit limit of a user is obtained, the door opening credit limit is compared with a preset threshold of each bin door, and the ID information of the bin door allowing tobe opened by the user is obtained on the basis of the comparison result, wherein the self-service vending equipment comprises at least one bin door, and each bin door has unique ID information; a dooropening request of the user is obtained, wherein the door opening request comprises the ID information of the bin door which is requested to be opened; whether the ID information of the bin door requested to be opened by the user is in the ID information of the bin door allowing to be opened by the user is judged on the basis of the door opening request, and if yes, the bin door requested to be opened by the user is controlled to be opened. According to the method, the technical scheme of associating the credit limit of the user with the bin doors of equipment is implemented, so that the purposes of restraining user behaviors, improving quality of consumers and reducing merchant losses are achieved.

The invention discloses a speech enhancement method based on non-local mean filtering. The problem of high generation rate of musical noise after speech enhancement in the prior art is mainly solved. The method is implemented by the following steps of (1) inputting speech with noise, and calculating a signal power spectrum of the speech with noise; (2) performing modified spectral subtraction preprocessing on the power spectrum of the speech with noise to obtain an estimated power spectrum of the speech with noise; (3) obtaining an estimated frequency spectrum according to the estimated power spectrum, and performing short-time inverse Fourier transform on the estimated frequency spectrum to obtain preprocessed speech; (4) performing non-local mean filtering on the preprocessed speech, and calculating a corrected value of the speech; and (5) replacing the original speech with noise by using the calculated corrected value. According to the method, similar points in a neighborhood of a point to be enhanced are subjected to weighted averaging based on a non-local principle, so that background noise can be suppressed, the clarity of the speech is maintained, and the quality of the speech is effectively improved; the method can be used for mobile communication.

The invention discloses a centrifugal pump fault diagnosis method based on a self-search characteristic peak value and a local range. The centrifugal pump fault diagnosis method comprises the following steps: firstly obtaining a vibration signal and a three-phase current signal of a centrifugal pump; automatically searching the rotating frequency of the centrifugal pump within the rated rotating frequency according to the peak value of the power spectrum; then constructing a self-search frequency conversion peak value index by using the vibration signal after low-pass filtering, constructing a self-search characteristic frequency peak value index by using the vibration signal after band-pass filtering and db10 wavelet decomposition, and constructing a current local range index by using the current signal; respectively setting corresponding threshold values, and outputting a diagnosis result by comparing the extracted indexes with the set threshold values, so as to realize automatic diagnosis of the fault of the centrifugal pump. According to the characteristics of the vibration signal and the current signal of the centrifugal pump, indexes are constructed respectively, the defects that a traditional method needs manual judgment, excessively depends on experts and priori knowledge, wastes time and labor and is prone to state misjudgment are overcome, automatic fault diagnosis of the centrifugal pump can be achieved, and the efficiency and accuracy of fault diagnosis of the centrifugal pump are improved.

The invention belongs to a preparation method of starch-based biological latex. The starch-based biological latex comprises the following components: 35-55% of absolutely dry starch, 0.1-10wt% of a plasticizer, 0.1-8wt% of a lubricant and 0.01-35wt% of a starch modifier. Starch emulsion is prepared from a buffer solution prepared from citric acid-disodium hydrogen phosphate. The preparation methodcomprises the following steps: 1) carrying out mechanical pretreatment on raw starch, wherein the pretreatment method comprises the steps of mechanically grinding dry powder by a ball mill for 0.5-12h; 2) preparing a ball-milled raw starch sample into a suspension liquid with the mass concentration of 40-55% by using a buffer solution, placing the suspension liquid in a water bath kettle at thetemperature of 30-55 DEG C, adding the starch modifier, and after heating to the temperature of 80-95 DEG C, insulating for 30-45 minutes; 3) cooling the emulsion in the step 2 to room temperature, adding a catalyst, and adding an oxidant to oxidize for 30-120 min at the temperature of 25-50 DEG C; 4) adding the starch modifier, adjusting pH of the emulsion to be 7-10, and adding a cross-linking agent to react for 20-90 min at the temperature of 50-70 DEG C; and 5) cooling and sieving to obtain the starch-based biological latex prepared by a ball-milling mechanical pretreatment composite biochemical modification method. The preparation method of the biological latex provided by the invention is relatively simple and easy to operate, and the product has the characteristics of moderate viscosity, strong adhesive force and high solid content, and can partially or completely replace petroleum-based latex in the papermaking industry.

The invention discloses a bidirectional gas valve kit for a sealed cabin of an underwater robot and gas a nozzle matched therewith. The bidirectional gas valve kit comprises a ventilating bolt A, a ventilating bolt B, a plug and a nut. The ventilating bolt A is mounted on a cover of the sealed cabin through the nut, the lower end of the ventilating bolt A is located outside the cover of the sealedcabin and the lower end of the ventilating bolt A is located in the cover of the sealed cabin, and the lower end of the ventilating bolt A is connected to the ventilating bolt B through a thread; andthe plug is mounted at the upper end of the ventilating bolt A. The bidirectional gas valve kit can restore quickly by means of deformation of a spring at the moment of being taken away after suckingand pressurizing the sealed cabin. A valve element of the ventilating bolt B is ejected to an upper cover by the spring to isolate the cabin and outside, so that air backflow during suction or pressurizing due to pressure difference between the indie and outside of the cabin is avoided, and therefore, it is closer to an ideal condition of sucking and pressurizing the sealed cabin. The bidirectional gas valve kit sucks and pressurizes the sealed cabin at one step, so that the maintenance and preparation work efficiency of the underwater robot is improved.

The invention discloses a videoconference terminal processing method and a videoconference terminal. The method comprises reading first data from an external storage device by utilizing driving, and performing corresponding processing according to the read first data. With the technical scheme provided by the invention, the problem that a conventional videoconference terminal relies too much on network communication can be solved.

The invention relates to a control method of a PCR analyzer. The control method comprises the following steps: acquiring project information of a current PCR analysis project; acquiring state information of each reagent slot position of a PCR analyzer, and distributing an idle reagent slot position for a current PCR analysis item according to the state information; sending cover opening instruction information for opening the distributed reagent slot position; judging whether the user puts a reagent cup in the distributed reagent slot position or not, and if so, sending cover closing instruction information for closing the distributed reagent slot position; extracting amplification program parameters and setting an amplification program according to the project information, and running the amplification program to perform PCR amplification; and extracting amplification result analysis parameters according to the project information, setting a result analysis program, and operating the result analysis program to carry out PCR result analysis. According to the invention, intelligent promotion of the PCR analysis process can be realized, distribution of reagent slots, amplification program setting and amplification result analysis are automatically realized, complicated manual setting operation and mistakes and omissions are avoided, and the analysis efficiency is improved.

The invention relates to a remote sensing satellite efficiency and cost balance optimization method. The method comprises the following four steps: designing a remote sensing satellite efficiency evaluation model; designing a remote sensing satellite multi-dimensional cost model; on the basis, taking a remote sensing satellite performance index, a reliability index and a weight index as optimization parameters, and designing a remote sensing satellite effect fee balance optimization model; and designing a fitness function based on the effectiveness and cost balance optimization model, solvingthe model by using a genetic algorithm to obtain an optimal solution, and feeding back an engineering unit. According to the invention, a comprehensive system integrating the remote sensing satelliteefficiency model, the multi-dimensional cost model and the efficiency balance optimization model is formed, and the optimal design scheme of the remote sensing satellite can be quickly and accuratelyobtained.