107results about How to "Reflect the impact" patented technology

The invention provides a method for quantificationally calculating a network abnormity index. The method comprises the following steps of: selecting a certain number of router nodes as acquisition points of data in a network to be monitored, and setting a basic period and a report period for data acquisition; performing data acquisition on each data acquisition point to obtain relevant information comprising an active IP address, a target IP address, a source port, a target port, a protocol type, stream start time, stream end time, packet number, byte number and a TCP marker; counting and calculating the acquired data to obtain indexes of network data traffic, protocol components, IP and port distribution and behavior modes in the network to be monitored; and combining the indexes obtained by calculating at the current time with corresponding indexes obtained by calculating in the basic period, and calculating the network abnormity index which is used for expressing the abnormity degree of the network to be monitored. The method can effectively reflect the influence of a typical network security incident on the network security situation in time.

The invention provides a battery state-of-health measuring method. The method comprises the steps of (1) recording the laying aside time t of a single battery in a unused state, and recording the voltage V and temperature T data of the single battery in real time, (2) calculating the SOC of a corresponding time of the battery in a working or laying aside state according to a relation function SOC=f(V, I, T, t) between SOC and current, the temperature, the voltage and the laying aside time, and thus obtaining the SOC difference Delta SOC between two times, and (3) calculating SOH in real time by using a formula SOH=(1-a*Delta SOCb)*100%. According to the method, the battery SOH can be accurately calculated based on the change amount of the SOC, and the influence of a battery system calendar life on the SOH can be reflected.

The invention discloses a resistance distribution-based method for analyzing a sub-channel with a grid mixing effect. The method comprises the steps of collecting experimental data of multiple mixing grids including a mixing grid of a to-be-analyzed reactor core in different working conditions, fitting a momentum source term relational expression capable of reflecting mixing performance of key parts of the mixing grids, and adding the momentum source term relational expression to a corresponding momentum conservation equation; and by solving a mass conservation equation, the momentum conservation equation and an energy conservation equation, obtaining more accurate local thermo-hydraulic parameters in the reactor core, thereby enabling prediction of a critical heat flux (CHF) value and a CHF position to be more accurate. The method is not limited by a structure and a solving method of a sub-channel program, and can be widely applied to the calculation of various types of sub-channel programs including a sub-channel program of a uniform flow model, a drift flow model or a two-fluid model.

The invention discloses an optical satellite in-orbit imaging simulation method based on wave front inversion, and belongs to the technical field of optical imaging simulation. The optical satellite in-orbit imaging simulation method includes the steps: (1) processing images in a partitioning manner by the aid of position relations among object fields and the images based on focused and defocused images of the optical satellite; (2) inverting wave front aberrations of view fields and directions; (3) constructing complex aperture functions, and performing normalized autocorrelation processing on the complex aperture functions to obtain different MTFs (modulation transfer functions); (4) building optical satellite in-orbit imaging quality deterioration models according to modeling characterizations of processes; (5) inputting radiant brightness before entrance pupil of scenes based on the model to simulate top obtain deterioration images. The method can reflect optical remote satellite in-orbit imaging quality deterioration laws and can support optimization design, index demonstration and performance evaluation of an optical remote imaging system and verification and optimization of an image processing algorithm, and the method is applicable to optical satellite in-orbit imaging simulation of a new simulation and diffraction imaging system of a refracted/reflected imaging system.

The invention discloses a method for analyzing soil displacement caused by double-line tunnel shield construction. Construction conditions, engineering equipment and geological conditions are analyzed; the composition ratio of factors of shield construction is obtained based on the Rankine's earth pressure theory; and a finite difference model is built by applying FLAC 3D software. Single-tunnel excavation, simultaneous tunnel excavation on two lines, and tunnel excavation on the right line after completion of tunnel excavation on the left line can be conducted on models in a numerical model space respectively, and soil displacement caused by construction is analyzed according to simulation results. A soil loss analytical expression is corrected according to the geological conditions; ground surface settlement caused by each construction method in a numerical simulation background is estimated by combining the corrected soil loss analytical expression with an expression, obtained based on a Mindlin displacement solution, of ground surface settlement caused by all factors in construction; the obtained ground surface settlement is compared with a numerical simulation result; and the reliability of a numerical simulation method and that of expression simulation are verified. The method disclosed by the invention overcomes the defect that the industrial norm is insufficient, and has practical guiding significance and wide application prospect for the shield tunnel excavation technology.

The invention discloses a method for testing the transaction performance of a terminal. A test tool comprises a client, a database and a server; a user makes a transaction template and test cases at the client and stores the transaction template and the test cases in the database; and during testing, the server receives a test command and adopts a processing mode comprising the following steps of: a, loading the transaction template and the test cases to a memory pool from the database; b, initializing an extraction algorithm for extracting transactions from the memory pool; c, starting communication connection among the server, an acquiring platform and an encryptor; d, setting communication links as required; e, serving as terminal processed transactions; f, calculating whether an interval between the current time and last statistical time is more than or equal to a statistical period or not, and outputting transaction statistical information according to the statistical period when the condition is met; and g, returning to the step d and circularly processing transactions interacted with communication. By the method for testing the performance, multi-level related transactions can be supported, the actual transaction situation can be truly simulated, and test continuity is ensured.

The invention provides a PMSM position servo system high-order object controller design and parameter determination method. A position controller adopts a PID adjustor, and PID adjustor parameters aredesigned based on pole assignment; a current ring adopts the PI adjustor and is corrected into an I type system to determine the parameters of the PI adjustor; the current loop is provided with a PWMinverter; and the characteristic equation of a PID closed-loop system is as follows: JTqs4+Js3+KtKds2+KtKps+KtKi=0, wherein J is a rotational inertia, Tq=1/K, K+KpkPWMKa/Ta, KPWM is the proportionalgain of the PWM inverter, Ka=1/R, R is a motor sator resistance, Ta is a motor electric time constant, s is a controlled time variable, Kt is a torque constant, Kp, Kd and Ki are controller control parameters, Ki=Kp/taui, and taui is an integral time constant of the PID adjustor. As contrastive analysis is carried out for different step responses of the high-order object control system when pole parameters change, a selection range of related parameters is given out, and engineering significance is obtained.

The invention provides a finite frequency fault detection method based on an event trigger strategy, and belongs to the technical field of photovoltaic power generation. In the aspect of system modeling, in order to research a distributed photovoltaic power generation system, a Markov neural network system dynamic model is adopted to describe nonlinearity and mutability of the distributed photovoltaic power generation system; in the aspect of a transmission strategy, in order to save network resources and relieve bandwidth pressure, an event triggering strategy is adopted, and energy loss in the transmission process is reduced while accurate information transmission is met; in the aspect of a fault detection method, a finite frequency fault detection method is designed, so that the systemhas robustness to random disturbance and sensitivity to faults, and meanwhile, the influence of signal frequency on the system can be better processed by adopting the finite frequency method.

Provided is a heat exchanger network energy efficiency evaluation method based on principal component analysis. The method adopts a principal component analysis method to establish a heat exchanger comprehensive assessment model, and carries out grading evaluation on energy efficiency of heat exchangers by using the comprehensive assessment model, wherein the step of adopting the principal component analysis method to establish the heat exchanger comprehensive assessment model comprises the following steps: selecting evaluation factor variables of the heat exchangers; carrying out KMO detection and SMC detection on the selected evaluation factor variables; carrying out standardization on the evaluation factor variables obtained after detection; establishing a sample correlation matrix and calculating feature values and feature vectors of the correlation matrix; determining the number of evaluation sample principal components according to accumulated contribution rate; obtaining a standardized principal component module through linear combination of the feature vectors and standardized evaluation factor variables; establishing the heat exchanger comprehensive assessment model according to principal component weight; and calculating comprehensive evaluation points of the energy efficiency of the heat exchangers, and determining a heat exchanger energy efficiency grade division score range table. The method can carry out evaluation on a heat exchanger network or the single heat exchanger, thereby preventing blindness of heat exchanger evaluation.

The invention provides a system for remotely and wirelessly monitoring plant chlorophyll fluorescence. The system comprises a modulation fluorescence instrument used for measuring plant chlorophyll fluorescence parameters, a data acquisition unit used for acquiring data monitored by the modulation fluorescence instrument, a wireless communication module used for sending the data to a monitoring center, a communication antenna used for sending the data through a wireless communication network, a solar energy panel used for acquiring solar energy and converting the solar energy to electrical energy, a storage battery pack used for storing the electrical energy which is generated by the solar panel and used as standby electrical energy so that the electric power supply of the system is supplemented when solar energy power generation is insufficient, a photovoltaic controller used for stabilizing a voltage of the solar energy power generation and enabling the solar energy panel to charge the storage battery pack, and a power supply panel used for providing a needed electric power supply to the modulation fluorescence instrument, the data acquisition unit and the wireless communication module. Correspondingly, the invention also provides a method for remotely and wirelessly monitoring the plant chlorophyll fluorescence. According to the method and system provided by the invention, the ecological monitoring of more parameters can be chronically and continuously performed in wild fields, and the wireless remote data transmission is simultaneously performed.

Provided is a sub-channel analysis method combining resistance and energy distribution and containing a grillwork mixing effect. The method comprises the steps of fitting a momentum source term relational expression and an energy source term relational expression which can reflect mixing performance of mixing grillwork key components by collecting experimental data of multiple mixing grillworks including a nuclear reactor core mixing grillwork to be analyzed under different working conditions, adding the momentum source term relational expression to a corresponding momentum conservation equation, and adding the energy source term relational expression to a corresponding energy conservation equation; obtaining more precise local thermal hydraulic parameters in a nuclear reactor core by solving a mass conservation equation, the momentum conservation equation and the energy conservation equation, and accordingly making the prediction of a critical heat flux(CHF) value and a CHF position more accurate. The sub-channel analysis method combining resistance and energy distribution and containing the grillwork mixing effect is not limited by a sub-channel program structure and solving method, can be widely applied to various types of sub-channel program calculation, and is mainly applied to a sub-channel program of a two-fluid model.

The invention provides a method and system for monitoring the risk of a power transmission tower in typhoon. The method comprises steps of obtaining DEM data of an area where a power transmission line is located, and carrying out the mesh generation to obtain a CFD mesh; acquiring wind speed and wind direction data monitored by meteorological stations around the power transmission line, and performing CFD calculation by taking the monitored wind speed and wind direction data as an input condition to obtain a wind field of the power transmission line when a wind direction pointing to the power transmission line exists; extracting wind speed and wind direction data of the power transmission tower and the wire, judging whether the wind speed of the power transmission tower is greater than the designed wind speed, and if yes, sending an early warning signal; and if not, calculating the overall stress of the transmission tower and the wire according to the wind speed and direction data and the finite element model of the transmission line, and sending an early warning signal when the stress exceeds the limit stress. The method is advantaged in that CFD calculation is performed according to the actually measured wind speed and wind direction data of the meteorological stations around the power transmission line so that the accurate wind speed and wind direction data and the overall stress of the tower and the wire can be obtained, and early warning can be timely performed.

The invention discloses an OUR-based sewage toxicity real-time early warning system. The OUR-based sewage toxicity real-time early warning system comprises a sewage filter, a sewage pump, an aerationpool, an aeration apparatus, two closed reaction pools, filamentous bacteria biological gel, zoogloea biological gel, two DO electrode probes, a PLC control early warning system and a water outlet, awater inlet of the sewage filter is connected with a water fetching opening on a pretreatment system and a biochemical pool connection pipeline, two ends of the sewage pump are respectively connectedwith water inlets of the sewage filter and the aeration pool, a water outlet of the aeration pool is connected with the closed reaction pool, the filamentous bacteria biological gel and the zoogloea biological gel are respectively arranged in different closed reaction pools, one DO electrode probe is arranged in each closed reaction pool, and both DO electrode probes are respectively connected with the PLC control early warning system. The OUR-based sewage toxicity real-time early warning system has the characteristics of real-time and multilevel early warning, intuitive effect, rapidness in early warning, stability and convenience in operation, and high efficiency and economy.

The invention discloses a signal testing method, which comprises the following steps: starting a script program to control a CPU (Central Processing Unit) of a corresponding board card, so that the power consumption of the CPU is dynamically changed; carrying out sending end test and receiving end test on the board card in the current CPU state, and obtaining a corresponding first test result, wherein the first test result comprises eye height test data and eye width test data. The power consumption of the CPU is controlled to dynamically change by using the script program, namely, a test environment of the dynamic noise of the power supply is provided for the board card signal, the first test result obtained in the test environment can obviously reflect the influence of the dynamic noiseof the power supply on the signal quality, and a reliable basis is provided for product quality and design optimization. Correspondingly, the invention further discloses a signal testing system and device with the same beneficial effects and a readable storage medium.

The invention discloses a three-phase transformer modeling method for asymmetrical load flow calculation of a power grid. A circuit model with an ideal three-phase transformer in serial connection with an impedor is adopted, a two-port definition is generalized to establish mathematic models of a Y-parameter matrix, block elements of the Y-parameter matrix can be calculated by a method resolving primary-side and secondary-side current by means of sequential zero setting of primary-side and secondary-side voltage, the mathematic models for different o'clock times in a same group are unified via a relative o'clock-time transformational matrix, addition items are added via a phase line transformational matrix to correct a matric including Y-parameters of a D-type winding transformer so as to avoid singularity, and finally nine groups of block element calculation formulae covering fifty-four Y-parameter matrixes of a three-phase transformer are obtained. The three-phase transformer modeling method has the advantages that the established circuit model is capable of directly reflecting a transformation process and influences of leakage flux and a zero-sequence excitation impedance; repeated modeling of the transformer for different o'clock times is needless by the aid of the relative o'clock-time transformational matrix; by the aid of a method for solving the problem of singularity of the Y-parameter matrixes by adding the addition items through the phase line transformational matrix, special processing is no longer needed during load flow calculation.

The present invention discloses a method and system for calculating an alternating current asymmetric fault main loop of a modular multilevel converter. The method comprises: the modular multilevel converter is connected with an alternating current system to generate a fault negative sequence current; and amount of electrical quantity change in the modular multilevel converter is calculated according to the fault negative sequence current. The method is based on the electrical quantity cyclic coupling relationship of the modular multilevel converter, and introduces the negative sequence faultcurrent into the internal cyclic coupling relationship of the modular multilevel converter to reflect influence of the asymmetric fault, and gives an analytical expression of the main electrical quantity inside the modular multilevel converter under an asymmetrical alternating current fault state, and can intuitively reflect the influence of the asymmetric alternating current fault on the modularmultilevel converter.

The invention discloses a method for constructing a rail transit station passenger flow prediction model on the basis of network topology characteristics. The method comprises the following steps that: (1) selecting the population density, the employed population density, the economic poverty coefficient and the road length density of an administrative region to which the station belongs, a rail transit station number in a range far away from the station for 1000/700/400m, a bus station number in a range far away from the station for 100/200/500m, a distance between the rail transit station and a downtown, a betweenness, a clustering coefficient, a degree and the station entering and exiting passenger flow data of different time periods of each station as variables; (2) obtaining the dataof each variable selected in (1); (3) importing parts of data of each variable in (2) into a Poisson regression model to fit, and independently simulating station entering and exiting passenger flow prediction of different time periods; and (4) checking the prediction model by residual variable data. The method is high in accuracy and rationality.

The invention provides a mixed-source software quality evaluation method based on a dual-language call relation graph, which focuses on Java and python-oriented mixed-source software quality evaluation and comprises the following steps of: setting and selecting quality indexes; constructing a Java/Python mixed source quality model based on the selected evaluation indexes; acquiring basic information for the evaluation unit of each index; constructing a Java and Python bilingual call relation graph on the basis of obtaining the basic information; determining the score of each quality index based on the collected basic information and the calling relationship; determining a weight value of each quality index based on the importance judgment matrix; and determining the score of the software according to the score and the weight value of each quality index so as to evaluate the quality of the mixed source software.

The invention discloses a method for rapidly identifying compositions of medicinal materials at different origin places and with different storage time. The method comprises the following steps that (1) sampling is conducted, specifically, 0.05-0.5 g of samples are weighed and placed into a 20 mL of headspace bottle, a bottle cover is compressed, after being incubated, the samples wait for being detected on a machine, and other pre-treatment processes are not needed; (2) testing is conducted, specifically, the incubated samples in the step (1) are tested through a gas-phase ion mobility spectrometer; and (3) qualitative analysis is conducted, specifically, a difference spectrogram of volatile organic matter in the samples is given through functional analysis software, and the matter can bequalitatively analyzed through an NIST database and an IMS database which are set in the software. According to the method, under the premise of not needing sample pre-pretreatment after directly heating and headspace sample injection are conducted, volatile organic components of lysimachia foenum-graecum hance samples can be quickly detected, and the testing result well reflects the influence ofthe origin place and the storage time on lysimachia foenum-graecum hance aroma.

The invention discloses an aircraft electro-mechanical actuator modeling method, mainly solves problems that a conventional modeling mode of a more electric aircraft electro-mechanical actuator based on a transfer function is high in workload and cannot reflect power flow of electric energy, and belongs to the field of more electric aircraft electrical system modeling and simulation. Modeling is performed on the basis of the energy features reflected by concrete functions which can be realized by components at the input and output ends without analyzing the concrete structure of the electro-mechanical actuator so that workload is low, modeling speed is high, the model structure is simple and general and operation speed is high. The input and output relation of power can be reflected by the model established by utilizing the method, and the model has normalized power interfaces with a power grid so as to be suitable for simulation of more electric aircraft electrical loads, and influence of the electro-mechanical actuator on power grid power can be truly reflected.

The invention discloses a method for evaluating the protection effect of a newly-built tunnel grouting ring on an existing shield tunnel. The method comprises steps of a three-dimensional coordinate system and a grouting ring mechanical calculation model being established according to the relative positions of a newly-built tunnel, an existing tunnel and the grouting ring; according to the established grouting ring mechanical model, the influence process on the surrounding soil layer being simulated through volume expansion of the grouting ring, and a formula for solving the additional stressof the surrounding soil layer caused by expansion of the grouting ring being deduced by utilizing a random medium theory; considering the influence of excavation of the newly-built tunnel and volume expansion of the grouting ring, and calculating the total vertical additional stress at the axis of the existing tunnel under the combined action of the excavation and the grouting ring; substituting the total vertical additional stress into the shear slab staggering and rigid body rotation cooperative deformation model to obtain the vertical displacement of the existing tunnel, and evaluating therationality of a tunnel underneath pass scheme and a grouting ring setting scheme according to the obtained vertical displacement of the tunnel. The method can be designed and optimized through repeated adjustment of parameters and multiple times of substitution checking calculation.

The invention relates to a method and a system for automatically measuring the aerobic respiratory capacity of a biodegradable material. The system comprises a culture device, a detection device, a ventilation device and a control device. The culture device is used for culturing a biodegradable material; the detection device is connected with the culture device through a gas detection circulating pipeline and is used for detecting the content of gas in the culture device; the ventilation device is connected with the culture device through a ventilation pipeline and used for replacing the gas in the culture device; and the control device is electrically connected with the detection device and the ventilation device and used for receiving an electric signal from the detection device and controlling starting and stopping of the ventilation device. Compared with the prior art, the method and the system have the advantages of adaptability to multi-source materials, stable and reliable test result, short test time, test result close to reality, low cost, environmental friendliness and the like, and can be applied to scenes such as evaluation of biological stability before final treatment or resource utilization of various biodegradable materials and treatment products thereof.