44results about How to "Strong engineering feasibility" patented technology

The invention discloses a wheel service state safety margin estimation and fault diagnosis method. The wheel service state safety margin estimation and fault diagnosis method comprises the following steps of firstly carrying out feature extraction for a steel rail vibration signal, decomposing the steel rail vibration signal by adopting an EMS (Empirical Mode Decomposition) method, calculating related characteristic indexes of each IMF (Intrinsic Mode Function) to serve as a characteristic vector of a wheel service state; secondly, classifying normal and fault states by utilizing LSSVM based on state characteristic vectors of steel rail vibration signals of a normal wheel and a faulted wheel, obtaining a safety margin of a train wheel and estimating the train wheel service state; and finally, carrying out fault mode identification for a normal wheel, a flat damage wheel and an out-of-round wheel by adopting a PNN (Probabilistic Neural Network), and providing reference basis for a vehicle maintenance department. The wheel service state safety margin estimation and fault diagnosis method has the advantages of high reliability and good engineering feasibility.

The invention discloses a large phased array antenna accurate installation method based on mathematical modeling, is suitable for single-wing or double-wing large phased array antenna accurate installation and adjustment and measurement of large size and high requirement of installation accuracy, and belongs to the field of microwave remote sensing general installation design. The method comprises the steps that (1) a star coordinate system is established; (2) fine adjustment of the star attitude is performed; (3) the coordinates of the installation points on the antenna and the start are measured; (4) a mathematical model is established and a gasket is calculated and adjusted; (5) the gasket is additionally arranged to install the antenna according to the calculation result; and (6) the planar integrated direction is measured and the gasket is corrected. The problems of the influence of repeated trial installation and adjustment of the large phased array antenna on the antenna installation accuracy and efficiency can be avoided so that the method has the advantages that project implementation is high, the installing accuracy can be easily guaranteed, the frequency of installation and adjustment and accurate measurement can be reduced and the installation efficiency can be enhanced.

The invention relates to car body design field in particular to car body structure optimization system which is based on the stable design. The invention is characterized in that CUI module is the graph user interface that the users use; the middle result and last result of the module in the interactive operation process is received; the variable definition module is responsible for the determination of designing variable and noise factors and transfer the results to CUI module; response face modeling module is responsible for buliding designing variable, noise factors and mathematical model of car body structure property index and then transfering to CUI module and stable optimization module; the stable optimization module builds stable desiging rule function and property probabiligy limiting relationship and completes the buliding of stable structure optimization mathematical model, then get the best stable designing result of the stable structure optimization mathematical model by optimization and transfer the best result to CUI module. The invention has the advantages that the invention relates to the influence that the designing variable and noise factors differences works on the structure property index; the propabiligy caculation of the property limiting function is accurate.

The invention discloses a method for vehicle oil consumption statistics. According to the method, the OBD interface of an oil consumption statistic device is connected to the OBD interface of a vehicle-mounted diagnosis system so as to collect the realtime work condition data of the vehicle; according to the information such as the equivalent ratio Vlambda of a linear or broadband type oxygen sensor, the air intake flow value Vmaf of the vehicle engine, and the like, by combining the vehicle's archival information, the realtime oil consumption of the vehicle can be calculated by an instant oil consumption calculation formula, and thus the oil consumption statistics can be achieved. The OBD interface of an oil statistic device is inserted into an original OBD interface of a vehicle to collect the vehicle work condition data, the original circuit of the vehicle does not to be broken or changed, the installation is convenient, the method is practical and safe, the quality guarantee of the vehicle will not be influenced, and thus the method can be accepted by the customers more easily. The oil consumption calculated through the work condition data will not be influenced by the external environment or road condition during the driving process, the precision is high, moreover, the realtime oil consumption of the vehicle can be calculated, and the oil consumption data precise synchronous comparison and analysis can be realized.

The invention provides a passive tire power generating device and a tire parameter detecting system. The temperature difference between the high temperature generated when a tire operates and the temperature of the external environment is used by the power generating device, electric energy is generated through a thermoelectricity collecting piece, and the electric energy provides a power supply through a storing and converting circuit and a transmitting circuit. The tire parameter detecting system comprises a parameter sensor, a wireless transmitter and a central receiver module. The passive tire power generating device is used for providing electric energy for the tire parameter sensor and the wireless transmitter. The passive tire power generating device is installed on the tire, and the tire parameter sensor is installed in the tire to measure the parameters of the tire. Parameter information of the tire is transmitted to the central receiver module from the interior of the tire through the wireless transmitter, and the tire parameters are then displayed. The problem of power supply of a tire pressure detector in a direct type tire pressure monitoring system is solved; the tire parameter detecting system is different from other passive tire parameter detecting systems in terms of tire parameter detection and is independent of tire pressure and vehicle vibration work; an energy transmission coil which is high in cost and complicated in installation does not need to be introduced into the system.

The invention relates to car seats, in particular to a car seat with an automatic folding and turning function. The car seat mainly comprises a backrest tube framework (1), a backrest and cushion linkage unlocking mechanism (2), a cushion tube framework (4), a turning mechanism (6) and a cushion turning mechanism (7). The backrest tube framework (1) is connected with the cushion tube framework (4). The backrest and the backrest and cushion linkage unlocking mechanism (2) are disposed on the backrest tube framework (1). The turning mechanism (6) is disposed on the cushion tube framework (4). The cushion turning mechanism (7) is disposed on the cushion tube framework (4). The car seat has the advantages that the car seat satisfies the requirements of national mandatory laws and regulations, get on and get off convenience of passengers is increased, the safety performance level of a whole car is increased, onerous operation steps are eliminated, performance level of the whole car is increased, user experience is increased, and problems of seat loosening and abnormal sounds are solved by means such as backrest coil spring assisting design.

The invention discloses a heat dissipation device and system for blade server chips, wherein the heat dissipation device comprises: a first embedded heat pipe and a second embedded heat pipe arranged below the first embedded heat pipe, and the blade server ; The first embedded heat pipe includes: the first evaporator connected in sequence, the long gas pipeline, the long liquid pipeline and the first finned condenser; the second embedded heat pipe includes: the second evaporator connected in sequence, the short gas pipeline, a short liquid pipeline and a second fin condenser; the blade server includes: a first chip and a second chip arranged inside the blade server; wherein, the first evaporator and the second evaporator are respectively connected to the first chip ( 301) and the second chip (302) are contacted and fixed. The invention simplifies the heat dissipation structure, improves the heat dissipation efficiency and reduces the equipment cost.

The invention relates to a calibration device and method for a sound wave scattering region of a Doppler current meter. The device comprises a standard plate (3), an upper damper (4), a lower damper (5), a first connecting rod (61), a second connecting rod (62) and a moving mechanism. The standard plate (3) is formed by connecting the round tubes to each other. One end of each of the round tubes is provided with a long cone (34), and the other end is provided with a short cone (31). The moving mechanism includes a first guide rail (71), a first linear stepping motor (72), a rotary stepping motor (73), a turntable (74), a second linear stepping motor (75) and a second guide rail (76). The first connecting rod (61) is a straight rod, the second connecting rod (62) includes an upper verticalrod (621), a horizontal rod (622) and a lower vertical rod (623), and the axis of the lower vertical rod (623) and the rotation axis of the rotary stepping motor (73) are in the same straight line. The effective acoustic scattering region of the Doppler current meter can be accurately calibrated.

The invention discloses a shield double-layered space combined metro station and relates to the technical field of shield tunnel metro stations. A #1 shield double-layered tunnel communicates with a #2 shield double-layered tunnel through a cross-linking channel; the #1 shield double-layered tunnel and the #2 shield double-layered tunnel are divided into double-layered spaces through middle plates, and a #1 line is arranged in the lower space of the double-layered space of the #1 shield double-layered tunnel; a #2 line is arranged in the lower space of the double-layered space of the #2 shield double-layered tunnel; platforms are arranged on one sides of the #1 line and the #2 line, escalators are arranged on one sides of the platforms, and both the platforms and the escalators are arranged in the upper spaces of the double-layered spaces; and inlet and outlet channels are arranged on one sides of the tops of the #1 shield double-layered tunnel and the #2 shield double-layered tunnel. The shield double-layered space combined metro station can meets the process and function of the station effectively, and meanwhile, is high in engineering exploitativeness, so that the construction risk can be reduced, pipeline migration and modification are reduced, traffic reconciliation is optimized, and the practicality is higher.

The invention relates to a recycling method of a hydrocarbon oil metal-removing agent. According to the invention, the hydrocarbon oil metal-removing agent is sufficiently mixed with hydrocarbon oil, and the mixture is processed through a common electrostatic desalting process, such that metal-ion-removed hydrocarbon oil is obtained; a desalting solution containing the metal ions is filtered, and is subject to ion exchange with ion exchange resin filled in a double-layered bed ion exchanger, such that a recycled water solution containing the hydrocarbon oil metal-removing agent is obtained; the recycled water solution containing the hydrocarbon oil metal-removing agent is well mixed with hydrocarbon oil and is reused; the failed ion exchange resin is processed through a regeneration treatment, and is repeatedly used. In prior arts, solid-liquid separation is not sufficiently carried out, part of metal salt slag which is not easily soluble or insoluble in water enters the electrostatic desalting system along with the circulated water solution, such that normal operation of the apparatus is influenced; also, a precipitant is over-dosed, such that apparatus corrosion is caused. With the method provided by the invention, the defects are overcome. The method is advantaged in environment friendliness and high metal removing rate.

The invention discloses a metro station with double-hole double-layer ejector pipe space combination, and relates to the technical field of metro stations. The metro station comprises a first ejectorpipe double-layer tunnel and a second ejector pipe double-layer tunnel which are symmetrically arranged. The first ejector pipe double-layer tunnel communicates with the second ejector pipe double-layer tunnel through a transverse connecting channel. The outer sides of the tops of the first ejector pipe double-layer tunnel and the second ejector pipe double-layer tunnel are each provided with an inlet and outlet channel. Inner spaces of the first ejector pipe double-layer tunnel and the second ejector pipe double-layer tunnel are each divided into an upper layer space and a lower layer space through structural plates. Each upper layer space is internally provided with a platform and an escalator. A first line is arranged in the lower layer space of the first ejector pipe double-layer tunnel, and a second line is arranged in the lower layer space of the second ejector pipe double-layer tunnel. The metro station can effectively meet the station process and function, meanwhile, the project practicability is high, the construction risk can be reduced, pipeline relocation is reduced, traffic reconciliation is optimized, and the practicability is higher.

The invention discloses a bio-remediation method of hexachlorobenzene-contaminated soil, which comprises the following steps: preparing soil particles; adding deoxidized distilled water and a small-molecular organic acid nutrition source; regulating the initial pH value of the reaction system; adding nitrogen to create an oxygen-free environment; and performing an anaerobic degradation reaction by use of indigenous microorganisms in the soil, etc. According to the characteristics of strong vitality, adaptability and decomposition capacity of the indigenous microorganisms in the environment contaminated for long time, the method disclosed by the invention makes full use of the anaerobic indigenous microorganisms in the hexachlorobenzene-contaminated soil and directly performs quick remediation on the hexachlorobenzene-contaminated soil by use of the indigenous microorganisms in the soil under the condition of adding the small-molecular organic acid as a nutrition source. The method is simple and convenient to operate, the reaction conditions are mild, the operation cost is low, secondary pollution is avoided, the reaction time is short, and the engineering feasibility is high. The removal rate of hexachlorobenzene in the remediated contaminated soil is close to 60%, and thus the harm to the environment and human body caused by the hexachlorobenzene-contaminated soil is greatly reduced.

The invention relates to a traveling wave differential protection method and system for VSC-MTDC. The method comprises a step of obtaining a local line mode voltage and a local line mode current of acalibration line in a multi-terminal flexible direct current transmission grid and determining a local line mode voltage change rate and a local line mode current change rate, a step of determining traveling wave energy according to the local line mode voltage change rate and the local line mode current change rate and determining whether the multi-terminal flexible direct current transmission grid is failed according to the traveling wave energy, and a step of performing Boolean-based identification on a failure type according to the traveling wave energy when a condition that the multi-terminal flexible direct current transmission grid is failed is determined and performing corresponding protection on the calibration line according to the identified and determined failure type. Accordingto the technical scheme of the invention, protection devices on two sides of the line do not need to be synchronized, the amount of information exchanged between the two devices is small, and the engineering implementability is high.

The invention discloses an out-of-step oscillation center positioning system and method based on wide-area measurement impedance angle information. According to the system and the method, real-time oscillation direction information sent by a plurality of out-of-step solution substations deployed on the two sides of a power transmission section channel in a regional interconnected power grid in theout-of-step oscillation process is comprehensively utilized in a control main station, and the position of an oscillation center is accurately judged in real time. According to the method, a master station and a plurality of substations are included, and the substations communicate with the master station through 2M multiplexing optical fiber channels. The substation collects voltage and currentdata of a section channel line, calculates and measures an impedance phase angle in real time through the voltage and current data, judges the direction of an oscillation center in real time accordingto the size distribution of the phase angle in fixed time, and sends the direction of the oscillation center to the main station in real time. And the main station can judge the position of the oscillation center in real time according to the oscillation direction information sent by each substation and a preset logic strategy. The position of the oscillation center can be accurately judged in real time.

The invention discloses a method for processing a bracket mounting surface meeting the assembly requirement of a solar wing with a dip angle, and belongs to the technical field of spacecraft structure design. The method solves the problem that in the existing process of installing the large solar wing with the certain dip angle, the installation and adjustment operation is complex due to the fact that the requirement for the plane precision of an installation face of an initiating explosive device pressing base is higher. According to the assembling precision requirement of the large solar wing, errors are decomposed in the direction perpendicular to a supporting cellular board and the direction parallel to the supporting cellular board, and the errors perpendicular to the supporting cellular board are compensated by machining a heat insulation pad into different thicknesses. The errors parallel to the supporting cellular board are controlled through the relative position degree error of second pin holes and the position degree error of a bracket in the direction parallel to the supporting cellular board.

Through combination of characteristics of a broadband digital array radar and a recent development level of a current digital signal processor and through theoretical derivation and computer simulation, a broadband digital beam forming method based on radio frequency direct sampling is researched, and a broadband digital array transmitting and receiving beam forming method with good engineering feasibility is provided. The method comprises the following steps of receiving a broadband radar echo signal; obtaining a digital radio frequency signal through radio frequency sampling; and carrying out digital phase shift and integer delay processing on the digital radio frequency signal, thereby finishing broadband digital beam forming processing. The method is not limited by a concrete form andarray manifold of the radar signal. Accurate beam pointing and an approximately ideal main lobe can be realized. Computing quantity is low. The engineering realizability is relatively high. Through control over a signal bandwidth, an ADC sampling frequency and a sampling frequency and signal bandwidth ratio, a sidelobe level of the signal can be controlled.