3677 results about "Living body" patented technology

The invention relates to the technical field of information security, provides an intelligent warehouse login verification method and system based on dynamic living body detection, and is used for realizing accurate generation of an identity label vector, enhanced authentication of a dynamic password and automatic matching of warehouse authority while accurately performing living body detection. And the security and convenience of warehousing system login are comprehensively improved. The method comprises the following steps: collecting real-time interaction action data of a warehousing system login user, calling a preset living body detection algorithm to carry out dynamic biological characteristic analysis on the real-time interaction action data, and generating a living body verification confidence coefficient and a user identity identification vector; performing dynamic password enhanced authentication according to the living body verification confidence coefficient and a preset security authentication threshold value, and generating a dynamic access token containing multiple layers of encryption identifiers; and based on the user identity identification vector and the dynamic access token, executing storage permission automatic matching processing, and outputting a login verification result associated with the user permission level to the storage system according to the permission matching label.

An electrode device for a living body includes: an electrode sheet including at least a pair of electrodes that receives a bioelectrical signal, a wiring member that transmits the bioelectrical signal received, a sensor module that outputs a signal relating to the bioelectrical signal to an exterior, a connector that connects the bioelectrical signal transmitted, to the sensor module, and a sheet member that supports the electrodes, the wiring member, the sensor module, and the connector; and an adhesive sheet that can be attached to a living body while covering the electrode sheet.

The invention discloses an MES (Manufacturing Execution System) login authentication method based on a face recognition technology, which relates to the technical field of industrial information security, and comprises the following steps of: constructing an authentication data acquiring a face image of an authorized user of an MES, extracting a reference face feature template after preprocessing, and constructing the authentication database; performing associated storage on the reference feature template, user identity information, preset operation authority and affiliated production station information to form an authentication database; according to the method, spoofing attacks are prevented through multi-mode living body detection, and the problem that a traditional password / key is easy to leak and borrow is solved in combination with uniqueness of human face biological characteristics; a person-post-terminal binding mechanism further limits permission abuse, and internal operation risks are reduced; the non-contact authentication does not need to memorize a password or carry a physical key, and is suitable for a working scene that a workshop operator wears gloves and holds tools; and the recognition passing rate in a complex industrial environment is improved through dynamic threshold optimization.

To provide a stent which can be easily indwelled on a branched part of a living body lumen, by a single manipulation.SOLUTION: A stent 1 comprises: a cylindrical first stent part 1A having a first skeleton part 11; and two cylindrical second stent parts 1B having second skeleton parts 12, 13. The first skeleton part and the two second skeleton parts are connected at a crotch part 1a where the two second stent parts are branched. Each of the first skeleton part and the two second skeleton parts is formed by bending a metal wire material so as to alternately form a crest part and a trough part in a circumferential direction surrounding respective axial directions of the skeleton parts and weaving so as to engage the crest parts and the trough parts in the axial direction, and can be self-expanded to an expanded state for defining a cylindrical channel by expansion from a shrunk state, in a radial direction substantially orthogonal to the axial directions. The first skeleton part and the two second skeleton parts have different wire diameters and heights of the crest parts, for achieving difference of expansion force in the radial direction.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of microalgae nano-selenium and application of biotransformed nano-selenium in prevention and treatment of plant late blight. The novel preparation method of the microalgae nano-selenium comprises the following steps: firstly, extracting an intracellular extract of chlorella pyrenoidosa, and then adding sodium selenite into the intracellular extract to carry out nano-selenium conversion; compared with an existing reported method that after sodium selenite is added into a microalgae living body culture solution to be converted into nano-selenium, algae is taken to break cells, and the nano-selenium is collected, the method has the advantages that the microalgae living body does not need to be used when the nano-selenium is biologically converted, and the subsequent complicated nano-selenium separation and purification steps can be avoided; the nano-selenium obtained by converting the intracellular extract can be directly applied. Experiments prove that the effect of the nano-selenium obtained through biotransformation on inhibiting phytophthora infestans of potato late blight pathogenic bacteria is obviously better than that of chemically synthesized nano-selenium, and the nano-selenium obtained through biotransformation has an obvious effect on preventing and treating potato late blight and has an obvious effect on promoting plant growth.

The invention discloses a non-living aquatic product supply chain quality deterioration visual early warning method, and belongs to the field of non-living aquatic product dynamic monitoring, and the method comprises the following steps: S1, synchronously collecting the physical appearance, quality indication labels and environmental parameters of non-living aquatic products, and constructing a multi-dimensional data set; s2, extracting complementary features, and outputting weighted fusion features; s3, establishing a residual shelf life prediction model, and obtaining a residual shelf life prediction value and a confidence interval; s4, based on the residual shelf life prediction value, constructing a supply chain digital twinborn body, and mapping a physical entity state in real time; and S5, continuously optimizing parameters of the residual shelf life prediction model. By adopting the non-living aquatic product supply chain quality deterioration visual early warning method, multi-modal feature deep interaction, digital twinborn visualization and adaptive iteration are fused, a data acquisition-feature fusion-prediction early warning-model evolution closed loop is constructed, and the limitation of a traditional single-modal and static model is broken through.

The invention relates to the technical field of medical instruments, and discloses an implantable neural electrode for long-term electrophysiological signal monitoring and a preparation method and application thereof. The neural electrode comprises an upper hydrogel insulation packaging layer, a lower hydrogel insulation packaging layer, an electrode site, a connecting line and a bonding pad, wherein the electrode site, the connecting line and the bonding pad are arranged between the upper hydrogel insulation packaging layer and the lower hydrogel insulation packaging layer, and the electrode site and the bonding pad are connected through the connecting line. The electrode sites, the connecting lines and the bonding pads are made of conductive hydrogel; the upper hydrogel insulation packaging layer and the lower hydrogel insulation packaging layer are made of insulation polymers and hydrogel. The insulating polymer is a plasma surface-modified insulating polymer. The preparation method of the neural electrode is simple and efficient, biotoxic materials are not introduced in the preparation process, good biocompatibility is achieved, continuous monitoring in a living body can be achieved for one year, important application value is achieved for studying signal response and neural circuits of all brain regions, and a beneficial tool is provided for long-term in-vivo monitoring.

The invention discloses a near-infrared fluorescent probe for detecting ONOO <-> as well as a preparation method and application of the near-infrared fluorescent probe, and belongs to the technical field of peroxynitroso ion detection. The near-infrared fluorescent probe for detecting ONOO <-> provided by the invention is high in detection speed, and the highest fluorescence intensity can be reached within 60 seconds; the reaction is obvious and easy to observe, when the compound reacts with ONOO <->, strong red fluorescence can be generated, and the change of the color of the solution can be observed by naked eyes; the selectivity is strong, the sensitivity is high, the interference of other biological molecules and active substances can be effectively avoided, the accuracy and the reliability of a detection result are ensured, and the lowest detection limit can reach 107nM; the hydrogel has good biocompatibility, is low in toxicity in a living body, and does not generate adverse effects on normal physiological functions of a biological sample; the provided preparation method is simple and easy to operate, the raw materials are low in cost and easy to obtain, the synthesis efficiency is high, and the preparation method can be used for large-scale industrial production and has wide application prospects.

The invention discloses a non-diagnostic method for selectively observing a magnetic resonance signal of a lactic acid molecule 1H in a living body, which comprises the following steps of: controlling a four-spin coupling system formed by 1H on methyl and methine of a lactic acid molecule by designing a pulse sequence, and preparing a Zeeman sequence spin state of the four-spin coupling system; the method comprises the following steps of: controlling a four-spin coupling system formed by 1H on methyl and methine of the lactic acid molecules by utilizing a preparation pulse, and preparing a Zeeman sequence spin state of the four-spin coupling system; eliminating or suppressing a nuclear spin coherent signal in an observation system through a pulse gradient field, and keeping the prepared Zeeman sequence nuclear spin state at the same time; converting the prepared Zeeman sequence nuclear spin state into an observable magnetic resonance signal by using a conversion pulse; magnetic resonance signals are collected, and selective observation of the magnetic resonance signals of the methyl 1H in the lactic acid tetraspin coupling system is achieved. The invention also discloses application of the method in selective screening and detection of lactic acid signals in a living body.

User authentication, spoofing and replay attack prevention, liveness detection, and user-and-document verification using a live video stream with spatial challenges. A camera of an electronic device captures and transmit a live selfie user-facing video, as part of a user registration process. The user is instructed to spatially move his body or face, such that his face would appear within a first particular on-screen shape; and to also, concurrently or simultaneously, spatially hold in his hand or move a particular an identification document such that it would appear within a second on-screen shape. Optionally, the on-screen shape moves on the screen, and the user is required to spatially move the relevant item to keep it within the boundaries of the moving on-screen shape. The system then analyzes the video via computerized vision, to determine whether the user complied with the spatial manipulation challenges.

The invention provides a non-contact palm vein anti-attack method based on a lightweight network, and the method comprises the steps: obtaining a palm vein data set, and dividing the palm vein data set into a training data set and a test data set; constructing a lightweight palm vein anti-attack network; the lightweight palm vein anti-attack network is trained; and identifying the palm vein image by using the trained lightweight palm vein anti-attack network. According to the method, the recognition accuracy is 99.6% or above, the average detection time is 8 ms, the model size is 353 kb, the method is easy to deploy under low-computing-power embedded equipment, and real-time, rapid and efficient non-contact palm vein living body detection is achieved; according to the invention, the in-vivo detection of the input palm vein image is realized through the deep learning network, so as to prevent the palm vein image from being attacked and cheated by artificial prostheses.

The invention belongs to the technical field of medicine preparation, and relates to PLGA gel used as an injectable long-acting local anesthesia medicine as well as application and a preparation method of the PLGA gel. The PLGA gel comprises the PLGA gel which is loaded with superparamagnetic Fe3O4 particles and a small molecule local anesthetic, namely, levobupivacaine (Levobupi). The PLGA hydrogel containing Fe3O4 and levobupivacaine can be used as an injectable long-acting local anesthesia medicine, and the hydrogel can be changed from liquid to solid after being injected into a living body, so that the release efficiency of the medicine is slowed down, and the local action time of the hydrogel is prolonged. In addition, the hydrogel can undergo a phase change from a solid state to a liquid state under magnetocaloric therapy (MHT), increase pore diameter, promote release of levobupivacaine, and provide enhanced pain relief in vivo. Compared with the prior art, the invention has the beneficial effects of simple synthesis and easy industrialization. The drug release rate is adjusted through the phase change of the hydrogel, super-long-acting analgesia is realized, and the analgesia time is gt; 20 days. The gel can be loaded with various local anesthesia drugs such as L-bupivacaine, and pain management can be carried out on various pain scenes clinically.

Provided are: a covered area determination unit that determines whether or not a face area including a face of a target person captured in an image generated by imaging the target person includes a covered area that covers at least partial area of the face; a first determination unit that determines whether or not the target person is a living body by a first determination method using the image, in a case where the covered area determination unit determines that the face area does not include the covered area; and a second determination unit that determines whether or not the target person is a living body by a second determination method that uses the image and that is different from the first determination method, in a case where the covered area determination unit determines that the face area includes the covered area.

The invention discloses a method for constructing a multicellular living body material by adopting a droplet bioreactor, which belongs to the crossing field of biological materials and microbial engineering, and comprises the following steps: (1) resuspending different cells in different polymer solutions to prepare degradable or phase-separable hydrogel particles containing cells; (2) dispersing the hydrogel particles in a cross-linkable hydrogel matrix to form a composite hydrogel; and (3) curing the composite hydrogel, and then carrying out degradation treatment to obtain the liquid cavity structure multicellular system bioreactor with spatial partition and dynamic interaction characteristics. According to the invention, ordered distribution and metabolism synergy of different microorganisms in space can be realized, controllable degradability and excellent mass transfer performance are realized, bacterial slow release and metabolite exchange can be maintained, and the method is suitable for long-term stable operation of a continuous flow reactor. The method has wide application prospects in the fields of green biological manufacturing, renewable energy source production, environmental restoration, biomedical engineering and the like.

An implant and an implant system. The implant is used for being implanted into a target part in a living body. The implant comprises a stent (100). The stent (100) is used for being provided at the target part to ameliorate physiological functions of the living body, the stent (100) comprises a cylindrical main body (110) made of a metal material, an opening (130) is provided on the peripheral surface of the cylindrical main body (110), and the opening (130) extends over at least a portion of the length of the cylindrical main body (110). The implant facilitates smooth transmission of wireless signals.

The invention provides a device screen-on control method, a household central control screen, a storage medium and an electronic device.The method comprises the steps that a display screen is controlled to enter a screen-off state, a living body signal is monitored through an infrared sensor, and the display screen comprises the infrared sensor, a camera and a light supplementing lamp; if a living body signal is detected, activating the camera and the light supplementing lamp; obtaining a face image collected by the camera; and lightening the display screen according to the face image. The technical problems of energy waste and light pollution caused by the fact that the display screen is normally on in the prior art are solved, power consumption is reduced, and the service life of the display screen of equipment is prolonged.

The invention provides a tumor living body sampling device, and relates to the field of biological sampling, the tumor living body sampling device comprises: a sampler main body, the sampler main body is a pistol-shaped structure; the inner sampling needle is coaxially and rotatably connected to the inner side of the reversing seat, the inner sampling needle is rotatably connected to the inner side of the sampling outer cylinder, the right cross sections of the sampling outer cylinder and the inner sampling needle are of arch-shaped structures, and the right end parts of the sampling outer cylinder and the inner sampling needle are of needle-shaped spine structures; hollow sampling openings are formed in arch-shaped parts on the right sides of the sampling outer cylinder and the inner sampling needle; the sampling transmission assembly is arranged in the sampler main body, and the sampling operation block drives the sampling outer cylinder and the inner sampling needle to rotate reversely at the same time through the sampling transmission assembly. The tumor tissue is rapidly and completely cut off, tearing damage is avoided, samples are isolated from the tissue, the samples are prevented from being mixed, and the problems that in the existing sampling process, the tissue is difficult to effectively cut off, tissue tearing is easily caused, and tissue samples are not pure are solved.

The invention discloses a covalent lysosome targeting chimera based on a nucleic acid aptamer and application of the covalent lysosome targeting chimera in protein degradation and immunotherapy, and belongs to the technical field of biology. The invention designs a covalent lysosome targeting chimera with click chemical reaction activity, and the simple and efficient covalent lysosome targeting chimera is used for realizing efficient protein degradation at the levels of cells and living bodies. When the tool is used for targeted degradation of immunotherapy biomarkers, immunogenic apoptosis of tumor cells can be caused, so that killing of an immune system to tumors is more efficiently activated. Meanwhile, the covalent lysosome targeting chimera overcomes the problem of immune-related side effects confronted by existing antibodies and polysaccharide peptide drugs, and can effectively avoid the potential occurrence risk of the immune-related side effects while efficiently degrading the target protein.

The invention discloses a display device and system for a three-dimensional virtual model of a living body and mixed reality equipment, and the display device comprises a construction module which is used for constructing a first virtual model containing body surface features and in-vivo features of the living body according to two-dimensional scanning data of the living body and image data of the living body collected in an operation; the calibration module is used for calibrating the first virtual model according to a second virtual model of the living body to obtain a calibrated first virtual model; and the display module is used for determining the pose of the calibrated first virtual model in a real scene by using the image data of the body surface identifier so as to display the calibrated first virtual model and the real scene through mixed reality equipment.

The invention relates to the technical field of transformer substation maintenance operation, in particular to a control method and device for a lifting arm of a special operation vehicle, and the method comprises the steps: obtaining a high-altitude operation point location of a hoisted object and the length and coordinate data of an electrified body, and calculating the safety distance between a suspension arm and the electrified body; collecting three-dimensional data of the working environment in real time, and constructing a dynamic three-dimensional model of the working environment; identifying and marking the position and the shape of the obstacle; tracking the motion state of the obstacle, and predicting the future position of the obstacle; determining a spatial relationship among the suspension arm, the lifting hook and the obstacle, and judging whether a collision risk exists or not; and if the risk exists, re-planning the motion trails of the suspension arm and the lifting hook, and if the risk is relieved, evaluating the operation efficiency of the current operation path and the original path, and selecting the optimal operation path to continue to execute the special operation. By automatically calculating and planning the hoisting path, the problems of narrow special operation space, difficulty in judging the distance from the electrified body and the like in the existing transformer substation are solved.

A betavoltaic power source. The power source comprises a source of beta particles and a plurality of regions for collecting the beta particles and for generating electron hole pairs responsive to the beta particle flux. The power source is intended for in vivo applications and is scaled to fit within a catheter for placing the power source and one or more sensors or activators within a living body. Preferably, a secondary power source is charged by a current developed by the electron hole pairs for providing constant power to the sensors or activators.

A tubular or non-tubular implant or prosthetic is provided to prevent or mitigate infection when implanted into a living body. The implant or prosthetic includes a textile layer comprising a plurality of interstices and / or pores and defining an interfacing surface and an opposing surface. The implant or prosthetic also includes a sealing layer comprising a non-porous, non-organic polymer adhered to the interfacing surface. The non-porous, non-organic polymer is formed of a material configured to prevent transmission or migration of bacteria through the sealing layer. The implant or prosthetic may also be configured to be anti-wetting and therefore provide for easier explantation from the body, to protect the textile layer from damage from electrocautery energy, and also to prevent leakage as well as transmural communication or migration through the graft body or wall while still allowing ingrowth of tissue along at least a portion of implant or prosthetic for secured anchoring.

The invention provides a three-dimensional tracking scanner with a face recognition safety system and a control method. The three-dimensional tracking type scanner comprises a scanner body; the face recognition module is connected with the scanner body and comprises a binocular camera assembly which is used for responding to the situation that an object approaches the three-dimensional tracking type scanner and synchronously collecting left and right images of the object; the binocular reconstruction unit is used for establishing a three-dimensional grid model of a human face according to the left and right images when the detected object is the human face; the living body detection unit is used for carrying out living body detection on the human face by adopting a multiple detection mechanism based on the three-dimensional grid model; the face recognition unit is used for performing identity recognition on the user corresponding to the face under the condition that the living body detection is passed; and the control management system is connected with the face recognition module, and the control management system is used for allowing the user to execute an operation matched with the permission of the target identity on the scanner body under the condition that the identity of the user is the target identity.

The invention provides an organ chip unit for simulating the pathogenesis of rheumatoid arthritis, and belongs to the technical field of cell culture. The chip comprises a top-layer chip, a bottom-layer chip and a middle microporous membrane, the top-layer chip and the bottom-layer chip are separated by the middle microporous membrane, and the middle microporous membrane is used for enabling cells in a cell culture space of the top-layer chip and cells in a cell culture space of the bottom-layer chip not to be in direct contact, but interaction of signal molecules and substance exchange can be carried out; synovial cells and cartilage cells are injected into the bottom-layer chip or the top-layer chip to be cultured. According to the invention, multi-cell three-dimensional co-culture can be realized. Through the additional stress stimulation co-culture part, the influence of pressure or tension on the cell environment can be judged, and the actual condition that rheumatoid arthritis joints receive pressure or tension for a long time can be simulated. The synovial cells and the cartilage cells are used, so that the structure of the inflammation joint in a living body can be truly reflected, and the interaction among various cell tissues can be reflected.

The invention relates to the technical field of analysis and detection, and particularly provides a method for predicting the transfection efficiency of fluorinated lipid nanoparticles by using multi-nuclear magnetic resonance, and the method comprises the following steps: (1) carrying out nuclear magnetic resonance fluorine spectrum detection on fluorinated nanoparticles to obtain a nuclear magnetic fluorine spectrum of a control group; (2) transfecting the fluorinated nanoparticles into a cell or a mouse living body, and performing nuclear magnetic resonance fluorine spectrum detection on the cell or the living body to obtain a nuclear magnetic fluorine spectrum of an experimental group; and (3) calculating the difference value of the target peak areas of the fluorinated lipid in the experimental group and the control group to predict the transfection efficiency of the fluorinated lipid nanoparticles. The method has good performance in the aspects of specificity, repeatability, stability, linear relation and the like, and can provide effective technical support for large-scale screening of nano medicaments of fluorinated lipid nanoparticles.

The invention relates to the technical field of living body fingerprint detection, and particularly discloses a living body fingerprint detection method based on multispectral and micro pulse feature fusion, which comprises the steps of signal synchronous generation, time domain alignment processing, feature matrix generation, weight dynamic adjustment, cross validation analysis, abnormal region sampling, living body model verification and living body authentication output. According to the method, the verification result is generated by synchronously collecting the multi-spectral reflection intensity and the skin displacement fluctuation sequence of the fingerprint area, dynamically adjusting the spectral absorption and pulsation track feature weight, performing cross validation to output the local abnormal area and obtain the supplementary feature data, and performing physiological coupling rule matching by using the preset living body judgment model. When three consecutive results do not conform to a living body rule, activating an anti-counterfeiting attack alarm protocol; according to the method, multispectral and micro pulse features are fused, and an environment adaptive weight mechanism is combined, so that the accuracy of living body detection is effectively improved, and the environment adaptability of a detection algorithm is enhanced.

A device may include a first electrode configured to be worn on the skin of a living body at a first location. A device may include a second electrode configured to be worn on the skin of the living body at a second location. A device may include a controller configured to transmit, to the living body via the first electrode and the second electrode, a pulse waveform that includes a plurality of pulses in sequence, wherein: frequencies of the plurality of pulses are modulated based on a Brownian noise distribution, and amplitudes of the plurality of pulses are modulated in accordance with a sinusoidal pattern.

By producing the proper wave interference using superimposed angularly separate waves that overlap with the proper time-phase relationship (called “Time-Correlated Standing-wave Interference”), wave energy is amplified (by “Coherent Intensity Amplification”) and teleported to precise locations. For instance, in one application, energy is teleported to one or more areas within a living body for such therapeutic applications as destroying cancer cells or plaques within arteries. A system implementing this technique creates amplified constructive interference at one or more selected disease locations, while producing destructive interference at surrounding locations. In this application example, the technique allows energy to be “teleported” to tumor cells, plaques, or other diseased cells, for instance, to destroy them, while surrounding healthy cells receive virtually no energy, obviating collateral damage from the treatment. The same method can be used to diagnose disease by detecting energy teleported to different locations.

The invention discloses gallium ion-quercetin coordination nanoparticles (GQNPs) as well as a preparation method and application thereof, specifically, quercetin, gallium nitrate hydrate and polyvinylpyrrolidone are respectively dissolved in an absolute methanol solution to prepare a quercetin solution, a gallium nitrate hydrate solution and a polyvinylpyrrolidone solution; secondly, fully mixing the quercetin solution and the polyvinylpyrrolidone solution, dropwise adding the gallium nitrate hydrate solution, and rapidly changing the color of the mixed solution from faint yellow to orange yellow in the dropwise adding process; and finally, dialyzing the orange-yellow mixed solution to remove excessive gallium ions and polyvinylpyrrolidone, thereby finally obtaining the GQNPs. The prepared GQNPs and deferiprone show excellent treatment effects on cell and living body levels, are expected to be applied to treatment of Parkinson's disease through multi-dimensional anti-ferroptosis, do not show obvious toxic and side effects in the embodiment, and are expected to be applied to further preclinical research.

The invention belongs to the technical field of electric overhead working trucks, and provides a narrow-body self-walking working platform with a hybrid power system, which comprises a walking platform, a working device and a control system. The walking platform adopts a narrow-body four-wheel-drive chassis and is provided with a hybrid power system of a fuel engine and an electric pump, and the control system integrates an environment sensing unit, a stability calculation unit, a track prediction unit, an early warning unit and a control decision unit. The environment sensing unit constructs a high-precision three-dimensional environment map; the stability calculation unit calculates the overall gravity center position and the dynamic stability boundary of the platform in real time; the track prediction unit establishes a dynamic hydraulic system response model; and the early warning unit adopts an artificial potential field method to calculate a safety avoidance path. And the control decision unit automatically adjusts the control instruction according to the risk type and degree. According to the invention, the organic combination of environment perception, dynamic stable control, prediction trajectory planning and electrified body safety protection is realized, and the operation safety and efficiency of the aerial work platform are obviously improved.