77results about How to "Meet the needs of the actual situation" patented technology

The invention relates to a multiple-laser radar raster map merging system based on a pilotless automobile. The multiple-laser radar raster map merging system based on the pilotless automobile comprises a one-line laser radar and a four-line laser radar, the two of which are mounted in front of the pilotless automobile, an eight-line laser radar mounted at the roof of the automobile, and a one-line laser radar mounted at the tail of the automobile; the laser radars are connected with a first industrial personal computer by use of a switch and by virtue of Ethernet; the data of the laser radar are transmitted to the first industrial personal computer by use of the switch and by virtue of the Ethernet, and the first industrial personal computer is used for analyzing and preprocessing the data; data are processed for different laser radars, respectively, and rasterization coding is performed on valid data and the coded values are transmitted to the first industrial personal computer in charge of data fusion by virtue of the Ethernet; next, data fusion is carried out by use of a raster map merging method and the rasterization coding is performed on the data, and finally, the coded values are transmitted to a second industrial personal computer by virtue of the Ethernet. The multiple-laser radar raster map merging system is used for solving the problem that the pilotless automobile and an assistant-driving automobile collide with a barrier, and therefore, the safety of the automobile in the driving process is improved.

The invention provides a pseudo-correlation feedback model information retrieval method based on BERT. The method comprises: in the first round of retrieval of pseudo-correlation feedback, evaluatinga target document set D through a BM25 model, screening out a document set D', evaluating documents in the document set D' again through a BERT model, and obtaining BERT scores of the documents; linearly fusing the document scores obtained through the BM25 retrieval model and the BERT model to obtain a pseudo-correlation document set D1; performing query expansion based on the pseudo-correlation document set D1 to select candidate expansion words, and optimizing the candidate expansion words through BERT sentence semantic similarity to obtain final expansion words; and combining the final extension word with the original query Q to generate a new query keyword set, and performing a second round of retrieval on the target document set D by using the BM25 model to obtain a final retrieval result. According to the method, a large amount of useless and irrelevant information can be removed from massive information, more accurate candidate words are obtained, and the precision of extended query and final retrieval is improved.

The invention relates to a pressure container with heat insulation measures, in particular to a welded adiabatic gas cylinder which comprises a cylinder body, a valve base, a safety valve, a rupture disk, a pressure gauge, a liquidometer and a connection pipe. The cylinder body consists of an inner tank and a housing; a vacuum interlayer is formed between the inner tank and the housing; an insulating layer is arranged in the vacuum interlayer; a supporting system and an inner evaporator are also arranged on the welded adiabatic gas cylinder; the supporting system is arranged in the vacuum interlayer and connected with the inner tank; the insulating layer is a structure of more than two layers of insulated packing layers, and the inner evaporator is arranged in the vacuum interlayer and provided with a degasser layer attached on the inner tank or attached on the housing. The welded adiabatic gas cylinder has the advantages of low heat leakage, good low-temperature insulating effect, excellent supporting strength, convenience for use, high loading rate, security and reliability, high purity of stored gas, high vacuum degree, long vacuum service life and the like and is mainly applied to low-temperature liquid such as liquid oxygen, liquid nitrogen and liquid argon.

The invention belongs to the technical field of rubber tracks and preparation thereof, specifically relating to a high-strength rubber track for excavating machines and a manufacturing method thereof. The high-strength rubber track contains the following raw materials by weight part: 100 parts of natural rubber, 3-6 parts of zinc oxide, 1.5-2.5 parts of stearic acid, 1-2 parts of an anti-aging agent 4010 NA, 1-2 parts of an anti-aging agent RD, 40-60 parts of carbon black N330, 8-12 parts of white carbon black, 2-6 parts of Si-69, 3-6 parts of aromatic oil, 2-2.8 parts of S, 1.2-1.8 parts of accelerant Cz 1.2-1.8, and 0.5-0.8 part of scorch retarder Pvi. The high-strength rubber track prolongs service life thereof, and has the advantages of excellent appearance, low hardness, high tear resistance, high tensile strength, excellent ageing resistance and ozone resistance. The high-strength rubber track has lower dynamic heating performance, so the high-strength rubber track can keep excellent performance and appearance under the more bad service environment; the technology is simple; and raw material ratio is reasonable.

The invention relates to an active surface myoelectricity detection probe adopting optical fiber transmission. The active surface myoelectricity detection probe adopting optical fiber transmission comprises a power source transformation and management module. The active surface myoelectricity detection probe adopting optical fiber transmission is characterized by further comprising an active probe body, wherein the active probe body comprises a reference electrode, a measuring electrode and a system control center, the system control center selects the measuring electrode and the reference electrode as a measuring pair in a time sharing mode through a single-chip microcomputer, the potential difference of the measuring pair is fed into a differential amplification circuit through an electronic simulation switch so that amplification and filtering can be carried out, and the detection probe transmits collected data to an upper computer through optical fibers in a one-way mode. The active surface myoelectricity detection probe adopting optical fiber transmission can solve the problems in the prior art, coupling interference on electrode wires and data transmission lines can be lowered effectively, the problem of 50 Hz power frequency interference entering from a power supply power line in a coupling mode can be solved, and therefore the needs of practical situations are met.

The invention discloses an oral cavity supporting device of an adjustable tongue retaining plate and relate to a dental auxiliary medical apparatus. The oral cavity supporting device has the functionsof distracting the oral cavity and preventing disturbance of the tongue. The oral cavity supporting device comprises an oral cavity supporting device body, the adjustable tongue retaining plate, a fixed length tongue retaining plate and a bidirectional lead screw, wherein when the oral cavity supporting device body is placed on one side of the oral cavity, the adjustable tongue retaining plate isconnected to the oral cavity supporting device body and a height adjusting rotary knob is connected to the middle of the bidirectional lead screw to adjust the height of the oral cavity supporting device body; a positioning rod is used for fixing corresponding positions of upper and lower parts of the oral cavity supporting device when the longitudinal height is adjusted. The oral cavity supporting device is I-shaped, the engaging part is of a concave arc shape, and the stress of the I-shaped structure is more centralized during engagement; the adjustable tongue retaining plate is of an embedded telescopic structure and a tongue retaining plate body is inserted into a tongue retaining sleeve to form the tongue retaining plate. The depth, inserted into the tongue retaining plate sleeve, ofthe tongue retaining plate is adjusted through three length adjusting holes. Balls on a V-shaped positioning elastic sheet are sunken into the three length adjusting holes to adjust and fix the stretching length of the tongue retaining plate body.

The invention relates to the technical field of damping, in particular to a high-temperature-resistant paraffin oil rubber damping cushion and a manufacturing method thereof. The high-temperature-resistant paraffin oil rubber damping cushion comprises the following components in parts by weight: 100 parts of HNBR (Hydrogenated Nitrile Butadiene Rubber) of which the hydrogenation degree is 99 percent, 5-7 parts of zinc oxide, 1-2 parts of stearic acid, 1.5-2.5 parts of an anti-aging agent 4020, 1.5-2.5 parts of an anti-aging agent RD, 25-35 parts of carbon black N660, 25-35 parts of carbon black N774, 8-12 parts of DCP (Dibasic Calcium Phosphate) and 5-7 parts of TAIC (Triallyl isocyanurate). HNBR is taken as a substrate material, general carbon black of which the particle diameter is large relatively and semi-reinforcing carbon black are taken as fillers, a peroxide, i.e., DCP and an assistant crosslinker, i.e., TAIC are adopted in a vulcanization system, so that the problems of poor compressive permanent deformation property and poor high temperature resistance existing in the conventional material can be solved by using the damping cushion, and the requirements of practical conditions are met.

The invention discloses a large public place building design method based on mobile platform analysis. The method comprises the steps of obtaining historical people flow data of all areas of a public place to plan distribution of disinfection devices; establishing a time judgment model, setting a starting people number threshold value and a minimum starting time threshold value, obtaining people flow data and timing data of each region in real time, carrying out statistics, and inputting the statistics data into the time judgment model; when the people flow rate data is greater than or equal to the starting people number threshold value, if the timing data is greater than or equal to the minimum starting time threshold value, forming a disinfection instruction immediately, and if the timing data is smaller than the minimum starting time threshold value, forming a disinfection instruction when the timing data reaches the minimum starting time threshold value; sending the disinfection instruction to a disinfection device, and when the disinfection device receives the disinfection instruction, resetting people flow data and timing data; the invention has the effect of improving the rationality of public place disinfection interval arrangement.

The invention discloses a novel intelligent laser cutting machine, which includes a machine tool body. The feeding end of the machine tool body is provided with a driving roller, both sides of the machine tool body in the length direction are internally and slidably provided with lifting type protective isolation plates correspondingly, the machine tool body is internally provided with a driving mechanism which drives the lifting type protective isolation plates to slide up and down, and infrared ray alarms connected with driving mechanism circuit signals are fixedly arranged on both sides, near the driving roller, of the machine tool body in the length direction correspondingly; and the infrared ray alarms are vertically arranged with the side wall of the machine tool body, mirror face refracting plates are fixedly arranged on both sides, near the infrared ray alarms, of the machine tool body correspondingly, the mirror face refracting plates are obliquely arranged at 45 degrees, andinfrared ray receiving plates are vertically fixedly arranged on both sides, away from the driving roller, of the machine tool body correspondingly. According to the novel intelligent laser cutting machine, the condition that apprentice inadvertently closes to observe laser cutting head work can be effectively avoided, and safety is improved.

The invention relates to the technical field of surface grinder motor stators, in particular to a surface grinder motor stator assembling and disassembling system and a using method thereof. The surface grinder motor stator assembling and disassembling system comprises a motor rotor, a motor stator, a stator guide sleeve and a surface grinder, wherein the motor stator is arranged on the outer side of the motor rotor; a positioning step is arranged at one end of the motor rotor; the stator guide sleeve is positioned at the positioning step and arranged on the outer side of the motor rotor; and the surface grinder is in inserting connection with one end of the stator guide sleeve, so that the problem that the enameled wire of the motor stator can be damaged in case of any carelessness when the surface grinder motor stator is disassembled and assembled and the newly exchanged stator is scraped and the problem of damage to the enameled wire, caused by decentraction when the stator is assembled, are solved. The surface grinder motor stator assembling and disassembling system has the advantages of reasonable structure, simple and practicable assembly using method and high safety and reliability, and can meet the requirements of the actual condition.

The invention relates to a marine high-pressure-resistant bidirectional rotary sealing ring which comprises a housing, an end cover, a first supporting ring, a second supporting ring, a sealing lip provided with a spring, a first O-shaped sealing ring, a second O-shaped sealing ring and a rectangular sealing ring with auxiliary sealing functions, a first fastening piece and a second fastening piece, wherein the spring is mounted on the sealing lip; the first O-shaped sealing ring is mounted on the housing; the second O-shaped sealing ring is mounted on the second supporting ring; the sealing lip, the first supporting ring, the second sealing ring and the rectangular sealing ring are mounted in the housing in sequence; the end cover and the housing are connected and fastened through the first fastening piece and the second fastening piece; the sealing lip is made from PTFE (poly tetra fluoro ethylene) material. The marine high-pressure-resistant bidirectional rotary sealing ring is good in sealing effect, and capable of reducing cost and meeting the needs of practical situations.