34results about How to "Avoid imprecise" patented technology

The invention discloses a residential building indoor environment monitoring and health grade evaluation Internet of Things system, and belongs to the fields of the residential building indoor environment detection technology and the information communication technology. The residential building indoor environment monitoring and health grade evaluation Internet of Things system is characterized in that indoor various-function room environment parameters are acquired in real time by utilizing data acquisition modules, and influence weights and health risk grades of the various indoor environment parameters on human health are comprehensively analyzed; and an expert opinion on improving of a corresponding environment condition and an expert strategy for improving the corresponding environment condition are given. An Internet of Things real-time data monitoring system is built at the same time, data can be timely transmitted to a user display terminal and a remote central service system, and the data can be taken as basic research data and a decision basis of a relevant government department. The residential building indoor environment monitoring and health grade evaluation Internet of Things system is advantageous in that the problem that the fact that the indoor environment is represented by a single parameter is unscientific is solved, real-time monitoring of the residential environment indoor comprehensive evaluation parameters and user mobile terminal contrast result synchronous searching can be achieved at the same time, and an suggestion for effective improvement of the environment and a measure for effectively improving the environment are obtained; and the residential building indoor environment monitoring and health grade evaluation Internet of Things system has the advantages of the wide application aspect and the high popularizing rate.

The invention discloses a tree-structure-based question answering system and method. A tree structure is built according to correlation of all question service attributes and different levels of all questions under services that the questions belong to; each node of the tree structure stores the questions and corresponding answers; each node of the tree structure is provided with a node identifier. The node questions and node identifiers in the tree structure are displayed to a client; after the node identifiers transmitted by the client over internet are received, the questions stored in the nodes corresponding to the node identifiers and the corresponding answers are supplied to the client. The tree-structure-based question answering system and method provides questions of the client with more accurate answers, so that user experience of the client is improved.

The invention discloses a locking device and a locking method which are used for automotive chassis power testing. The locking device comprises a rectangular frame; servo blocks are fixedly arranged at four right angle points of the rectangular frame correspondingly; locating rods are sleeved with the servo blocks; a plurality of grooves are formed in the inner peripheral wall of each servo blockin the circumferential direction of the corresponding servo block; electromagnets I are slidingly arranged in the grooves; the outer side walls of the electromagnets I are connected with the groove bottoms of the grooves through springs; pressure sensors are arranged on the upper end faces of the servo blocks, and communicate with mains switches of the electromagnets I through controllers; and theoutput ends of two air cylinders are connected with the bottoms of two mutually parallel edges of the rectangular frame. The electromagnets I generate magnetic force after being electrified, the inner walls of the electromagnets I are attracted to the outer walls of the locating rods accordingly, the rectangular frame is locked to the locating rods, the upper surface of the rectangular frame is in contact with the bottom surface of a lifting plate, and the rectangular frame can provide stable support to the lifting plate, so that the four right angles of the lifting plate are prevented from shaking, and the precision of testing data is further ensured.

The invention discloses a system and a method for powder transportation. An international standard container is used, the top of the transformed container is provided with a feeding port, and the bottom of a back door of the transformed container is provided with a discharging port. At the departure place, after the powder is loaded with zero pressure through the feeding port, the feeding port is sealed, the container serves as a multimodal transport device to transport the powder to the destination, a fluidized bed feeding tank is arranged at the destination, the discharging port of the container and an inlet of the fluidized bed feeding tank are aligned, and thereby the powder discharges automatically under own gravity. By means of the system and the method for powder transportation, an international standard container can be utilized directly and transformed, and thereby the advantages of simple production and strong generality are provided, and the purpose of international multimodal transportation is achieved. The method adopted is simple, the transportation efficiency of the powder can be improved greatly, the working environment is improved, the workers and workload are reduced, the transportation cost is reduced, and the market competitiveness is improved.

The invention provides a power distribution network automatic construction investment benefit evaluation method, which comprises the steps of firstly selecting a power distribution network automatic construction investment index and a reliability core index; then performing 0-1 standardization or range standardization of the automatic construction investment index and the reliability index based on historical automatic construction investment and power outage data, so as to construct a difference type increment index and a ratio type increment index; performing pairing screening of a reliability index and automatic investment index combination based on a Pearson correlation coefficient and a Kendall rank correlation coefficient; and determining a final reliability index and automatic investment index pool; constructing an association model of an automatic investment index and a power outage reliability index through improved linear regression; then finally obtaining an automatic investment index version combination significantly influencing the reliability index by means of a goodness-of-fit coefficient and a significance weight coefficient of the improved linear regression, and obtaining a weight coefficient of the reliability index improvement degree of the automatic investment project.

The invention discloses a method and equipment for receiving an orthogonal frequency division multiplexing (OFDM) signal, RELATING TO COMMUNICATION TECHNOLOGY. The method and the device are used for solving the problem that when an OFDM baseband system is used for receiving OFDM signals, signal processing process is complex, the occupied resources are more, the calculation complexity is higher andefficiency is low. The method comprises the following steps of: receiving an OFDM signal including a cyclic prefix of a preset cyclic length, and sequentially removing the cyclic prefix of the OFDM signal by using an OFDM receiving model pre-constructed based on a deep learning network, carrying out inverse Fourier transform, channel estimation and channel equalization, demodulating into a corresponding quadrature amplitude modulation (QAM) signal, and outputting the quadrature amplitude modulation (QAM) signal.

The invention discloses a three-dimensional air route planning method, system device and a medium, and belongs to the field of route planning, and the method comprises the steps of obtaining the three-dimensional space information of a to-be-inspected target, and determining the vertical face contour of the to-be-inspected target; constructing a virtual facade which is opposite to the facade contour of the to-be-inspected target, wherein the orthographic projection of the virtual facade on the facade contour of the to-be-inspected target covers the facade contour of the to-be-inspected target; gridding the virtual facade, and determining the midpoint of each grid in the virtual facade as a pre-selected waypoint; determining a pre-selected waypoint, covered by the vertical surface contour of the to-be-inspected target, of the projection point as an effective waypoint; and connecting the effective waypoints into a route according to a preset rule. According to the invention, accurate facade route planning is facilitated, observation is also facilitated, and the route planning efficiency can be effectively improved.

The invention discloses an automatic-grading quartz sand grinding machine, which comprises a base, a shell, an inner container, a support, a grinding plate, a feed inlet, a discharge hole and a grading mechanism. The shell is arranged on the base; the inner container is arranged in the shell; the support is arranged on a surface in the inner container; the grinding plate is arranged on the support; the support is fixed onto the inner container; the discharge hole is formed in the lower part of the inner container; the feed inlet is formed in the upper end of the shell; and the grading mechanism is arranged under the feed inlet. The invention further discloses a working method of the automatic-grading quartz sand grinding machine. Sand materials are graded through the grading mechanism so as to be divided into multiple strands with different thicknesses, so that the grinding plate can be used for grinding with different strengths according to the different thicknesses of the sand materials, the final sand materials can be uniform in thicknesses, the quality of the sand materials is improved, meanwhile, the problem that fine sand is worn and consumed during a grinding process is further solved, and the yield of the grinding machine is improved.

The present invention discloses a Mongolian medicine tongue and pulse exsanguinations clip. The Mongolian medicine tongue and pulse exsanguinations clip comprises a cross plate and a vertical plate, the surface of the cross plate is provided with a set of chutes, the upper surface of a sliding plate is provided with a flexible stand column, a first strut is arranged at a position having the same height as the top end of the vertical plate on the stand column, one end, far away from the stand column, of the first strut is fixedly connected with a lower tongue plate, the lower tongue plate is provided with a plurality of first through holes corresponding to lower tongue surface acupoints of a tongue, a screw thread post is vertically arranged at the middle portion of the first strut, a second strut is arranged, one end, far away from the stand column, of the second strut is provided with an upper tongue plate, the upper tongue plate is provided with second through holes corresponding toupper tongue surface acupoints of the tongue, and the top end of the vertical plate is provided with a recessed portion configured to put a lower jaw. The upper tongue plate and the lower tongue platecorresponding to the tongue surface acupoints are employed to clamp the tongue, a patient does not need to actively put the tongue out, and doctors do not need to pull tongues by employing gauzes soas to ensure the stability in the operation process.

The invention relates to a liquid filling and taking device for a U-shaped porous glass plate absorption tube. A liquid filling adjusting fixing device, a liquid filling device, a liquid taking adjusting fixing device and a liquid taking device are arranged on a work table; the liquid filling adjusting fixing device comprises a bracket arranged on the working table; a rotating shaft is arranged onthe bracket through a bearing; the end part of the outer side of the bracket is connected with a rocker handle; a moving gear is arranged on the inner side of the bracket; the moving gear is connected with a transmission gear through meshing; and the transmission gear is fixed on the bracket through a support rod. The liquid filling amount and the liquid taking completeness can be conveniently controlled, both the accuracy of the liquid filling amount and liquid taking completeness can be ensured, problems that multi-time repeated operation caused by uneasy control on the liquid filling amount, and low measurement result accuracy caused by liquid taking incompleteness are avoided, the precision and the accuracy of measurement results are greatly improved while labor and materials are saved, in addition, the working difficulties are reduced, and the working efficiency is improved.

The invention discloses a jewelry precision punching plastic burning needle mold. The mold comprises a bottom plate and a first fixed mold, wherein a matching column is fixed to the outer edge of thebottom plate; an assembly hole is formed in the matching column; a bottom panel is arranged on the upper surface of the bottom plate; a stainless steel punching needle is arranged on the upper surfaceof the bottom panel; a second fixed mold is mounted above the first fixed mold; the first fixed mold is located above the bottom plate; a third fixed mold is arranged above the second fixed mold; andlugs are fixed to the outer edges of the first fixed mold, the second fixed mold and the third fixed mold. The jewelry precision punching plastic burning needle mold is formed in a manner that the three fixed molds are superposed together, matched with the circular bottom plate and locked by three fixing screws; a fixed mold plate is formed by one-time injection molding of a precision plastic mold and is made of PC and glass fiber plastic raw materials with the temperature resistance and the high stability; and the circular bottom plate is also formed by one-time injection molding of the precision plastic mold and is made of the same materials the same as that of the fixed mold plate.

The invention discloses packaging equipment for an air-sensitive two-dimensional material device and a packaging method, and belongs to the field of two-dimensional material packaging measurement. Thepackaging method utilizing the equipment comprises the following step of packaging the two-dimensional material device in a closed space formed by a base, a covering slide and a packaging adhesive ofwhich the thickness is higher than that of the two-dimensional material device in an inert gas environment; the method is used for packaging the air-sensitive two-dimensional material device, so thatthe problem that orbital hybridization is likely to be generated when a layer of graphene or boron nitride is stacked on each of the upper portion and the lower portion of a to-be-tested two-dimensional material for packaging traditionally is solved, and the material is protected against or less affected by the external environment; and Raman testing is conducted twice through the equipment, theinfluence of the covering slide is eliminated, and a safe and stable environment is provided for subsequent research and testing of the air-sensitive two-dimensional material device.

The invention discloses a method for rapidly screening 17 organic antibacterial agents in a paper product for daily use. The method comprises the steps of by taking the paper product for daily use as a research object and an acetonitrile aqueous solution as an extracting agent, heating in a water bath, carrying out ultrasonic extraction, salting out anhydrous magnesium sulfate and ammonium sulfate, degreasing acetonitrile-saturated n-hexane, purifying by using a mixed purification column of anhydrous sodium sulfate and graphitized carbon black, carrying out rotary evaporation and concentration to dryness, redissolving by using a methanol aqueous solution, and screening by using UPLC/MS-IT-TOF. An ion trap-time-of-flight mass spectrum screening database of 17 organic antibacterial agents in the paper product for daily use is established, mass spectrum fracture characteristics and m/z accurate mass numbers of MS1 and MS2 are obtained, and a quasi-targeted screening technology is formed to quickly screen and accurately identify the 17 organic antibacterial agents in the paper product for daily use under the condition of no standard substance (reference substance).

The invention relates to a method and device for measuring the resistance of a stator winding of a permanent magnet synchronous motor. The method comprises the following steps of obtaining voltage Udof a d axis and voltage Uq of a q axis of a stator of the permanent magnet synchronous motor; obtaining current Id of the d axis and current Iq of the q axis of the stator of the permanent magnet synchronous motor; obtaining an electric angular velocity omega of a rotor of the permanent magnet synchronous motor; obtaining rotor flux Ke of the permanent magnet synchronous motor; and calculating theresistance R0 of the stator winding of the permanent magnet synchronous motor according to a formula R0=f1 (Ud, Id, Uq, Iq, omega and Ke). The invention further relates to a device for measuring theresistance of the stator winding of the permanent magnet synchronous motor. According to the method and device for measuring the resistance of the stator winding of the permanent magnet synchronous motor, the calculation accuracy on the resistance of the stator winding can be improved.

The present application relates to a method, apparatus, and computer device for measuring a user experience quantitative evaluation value. The method comprises the following steps: acquiring background data of a social platform and subjective weight values of indicators in a user experience quantitative evaluation model; Wherein, the user experience quantitative evaluation model is constructed ona social platform according to a plurality of selected indexes; Acquiring an index preset value, calculating an objective weight value of the index according to the background data, a subjective weight value of the index and the index preset value; Calculating a total weight value of the social platform according to an objective weight value of the index, and taking the total weight value as a user experience quantitative evaluation value of the social platform. The method can make the measured quantitative evaluation value of user experience used for evaluating the quantitative situation of user experience more accurate.