30 results about "Injury mechanisms" patented technology

The invention discloses an injury experiment device for simulating a brain deceleration injury in a traffic accident. The device comprises a rack and an acceleration device, a rotating driving device,an experiment box, a simulation track and a deceleration device. The experiment box is arranged on the simulation track. The acceleration device and the deceleration device are arranged at the starting line and the finishing line of the simulation track respectively, the acceleration device is used for driving the experiment box to move on the simulation track, the acceleration device is used fordecelerating the experiment box, and the experiment box is used for fixing an animal needed by an experiment. According to the injury experiment device for simulating the brain deceleration injury inthe traffic accident, the deceleration injury mechanism process can be independently simulated, the diffusible axis cylinder injury causing mechanism process can also be simulated, the brain deceleration injury causing process with the diffusible axis cylinder injury in the traffic accident can be effectively simulated, the repeatability is high, and the experiment result is accurate.

A shoe (100), notably a sports shoe useful for preventing ankle injuries comprises a sole (102) with a ground-engaging surface (102), and lateral and medial edges (106; 108) associated with respectivelateral and medial connecting portions (110; 112) interconnecting and extending between the ground-engaging surface (104) and the lateral and medial edges (106; 108). At least one of the connecting portions (110; 112) defines a surface area of reduced friction (114; 116) provided, e.g., in the form of retrofitted patches (115; 117), which are circumferentially surrounded by adjacent surface areas(103; 105; 107) having a relatively high coefficient of friction. Hence, friction is differentiated in different areas of those parts of the shoe which are implicated in injury mechanisms, and injuries may thus be prevented in the recovery phase after injury, and primary prophylaxis may be achieved. The area of reduced friction (114; 116) reduces the ability of the wearer's foot to rotate relative to ground when the load of the wearer's body is shifted towards or lands near the edge (106; 108) of the shoe (100).

The invention relates to a cross-scale micro nanometer grade in-situ composite load mechanical property testing platform, belonging to electromechanics. The cross-scale micro nanometer grade in-situ composite load mechanical property testing platform is composed of a precision drive and transmission unit, a signal detection and control unit and a clamping, connecting and supporting unit, wherein,in the precision drive and transmission unit, a DC servo motor provides power output, and a two-stage worm and gear mechanism with large reduction ratio and a precision ball screw mechanism transmit power; the signal detection and control unit is composed of a precision displacement sensor, a precision pull pressure sensor and a coder in coaxial rigid connection with the DC servo motor; and the clamping, connecting and supporting unit comprises a clamper component for locating and mounting a standard test specimen, and the like. The cross-scale micro nanometer grade in-situ composite load mechanical property testing platform can be compatible with imaging instruments, and performs a cross-scale in-situ micro nanometer composite load test on a macroscopic test specimen through observation via the imaging instruments, so as to perform in-situ monitoring on processes of microscopic deformation, injury and fracture of materials, so that a new testing method for revealing the mechanical properties and the injury mechanism of the materials at the micro nanometer grade is provided.

The invention provides a drug for relieving body injury caused by chronic alcoholic poisoning. The drug comprises an effective ingredient of AOAA (aminooxyacetic acid). Learning and memory ability evaluation is performed on chronic alcoholic poisoned rats and normal rats by use of a Y-type electric maze by establishing a rate chronic alcoholic poisoning model. Experimental results prove that compared with normal control groups, the chronic alcoholic poisoning model group of rats has remarkably reduced learning and memory ability. After AOAA intervention is given, the training times required for rats of a remedy group to learn spatial discrimination are reduced, and difference has statistical significance. Accordingly, AOAA can relieve memory deterioration caused by the chronic alcoholic poisoned rats, improves the learning memory ability and provides a scientific basis for research of chronic alcoholic poisoning injury mechanism and treatment by AOAA.

The invention discloses a measuring device and measuring method for film photo-thermal property. Based on the original surface thermal lens technology, the modulation frequency of pumping light beams is changed, so that the amplitude of detecting signals and the relationship of phase signals changed along with the frequency can be obtained. The relationship and the calculated result of the theoretical model are compared, and then some important information of the inner part of the film can be obtained. In the invention, not only can the absorption rate of the film be measured, but also the thermal conduction rate of a single-layer film and the deep indexing of some strong absorption impurities can be measured, so that the comprehensive evaluation on the photo-thermal property of the film can be conducted, and greater auxiliary action on the aspects of optimizing film coating process, seeking injury mechanisms and the like can be achieved.

The invention provides a fatigue life prediction method and device based on the weighted average maximum shear stress plane, which relates to the field of multiaxial fatigue strength theory. The method includes: (1) passing the multiaxial variable amplitude load history through the von Mises equivalent stress formula The equivalent stress history is synthesized, and the von Mises equivalent stress history is counted by Wang‑Brown multiaxial cycle counting method; (2) The weighted average maximum shear stress plane is used as the high cycle multiaxial variable amplitude load. critical surface; (3) Calculate the fatigue damage parameters on the critical surface of each repetition obtained by counting; (4) use the Zhang-Shang model to calculate the fatigue damage; (5) use Miner’s linear accumulation rule to calculate the The damage is accumulated, and finally the fatigue life is calculated. The weighting function proposed in this method can take into account the main fatigue damage mechanisms under multiaxial loading. The life prediction results show that the life prediction method can better predict the fatigue life under multi-axis constant amplitude and variable amplitude loading.

The invention discloses a construction method of an in-vitro model for simulating mesenchymal stem cell transplantation, which comprises the following steps of: (1) selecting in-vitro neonatal rat cortical neurons; (2) selecting in-vitro rat mesenchymal stem cells; (3) pre-processing the in-vitro rat mesenchymal stem cells, and inoculating in the neonatal rat cortical neurons for co-culture; and (4) after the co-culture, treating the rat mesenchymal stem cells and the neonatal rat cortical neurons by a light microscope, a fluorescence microscope, an atomic force microscope and a scanning electron microscope; and determining an in-vitro model for simulating mesenchymal stem cell transplantation and a growth tendency, an interaction and formation of a synapsis-like structure between the cortical neurons and the mesenchymal stem cells on an ultrastructure. The construction method disclosed by the invention provides a simplified in-vitro model for the mesenchymal stem cell transplantation; meanwhile, the synapsis-like structure formed in the model provides an in-vitro evidence of a structure integration mechanism for the mesenchymal stem cell injury mechanism.