37results about How to "Reasonable value" patented technology

A system to provide automobile financing to individuals with relatively lower credit scores or ratings, or no credit rating, due to lack of credit or lending purchases, that would otherwise only qualify for sub-prime, higher interest loans. Due to the overall system structure, lower rate interest loans can be extended to participants. The system utilizes the auto financing loan applicant's term of employment and / or other employment performance data as the principal credit criteria to qualify the creditworthiness of an applicant versus the applicant's credit score or credit rating. Applicant's driving records are also reviewed as system automobile loan approval credit criteria. Loan applicants provide employment related information and execute a letter of authorization providing the system with authority / rights to contact the applicant's employer to verify said employment information. In order to provide participants with lower interest rates than would otherwise be available through conventional channels, automobiles financed under the system must meet minimum profile criteria, including the year of the auto, the mileage, retail value relative to the wholesale value, and autos financed under the system are covered by extended warranties and have GPS systems installed for asset protection purposes. In utilizing employment term as the principal creditworthiness criteria, the system can to be offered through employers as an employee loyalty reward program.

The invention discloses an MMC-HVDC direct-current transmission line fault positioning method, which comprises the steps of decoupling bipolar voltage through a symmetric component transformation matrix to obtain a line mode component and a zero mode component of the bipolar voltage; carrying out VMD decomposition on the line mode component and the zero mode component, and carrying out parameter alternate optimization on the modal number k and the penalty factor in the decomposition process, so as to enable the values of the modal number k and the penalty factor to be more reasonable; performing analyzing by utilizing S transformation, positioning a fault mutation point, and accurately detecting the time when the wave head of the traveling wave arrives at two sides; and achieving accuratepositioning of the fault of the high-voltage direct-current transmission line by using a fault distance measurement algorithm for eliminating the wave velocity influence. According to the method, thenumber K of modes and the penalty factor are optimized through an alternate parameter optimization method, on the basis, the VMD is used for decomposing the traveling wave signal and extracting the intrinsic mode component of the traveling wave signal, then S transformation is used for accurately positioning a fault mutation point, and finally accurate fault positioning is achieved.

The invention relates to the field of civil engineering, and discloses a method for acquiring dynamic resilience mechanical characteristic parameters of aggregates, which comprises the following steps: 1) deriving a stress increment constitutive equation of the aggregates, and determining a stress loading sequence according to the equation; 2) performing a dynamic triaxial test on the granules according to the stress loading sequence, recording the stress level, the stress increment, the corresponding horizontal deformation and the corresponding vertical deformation of the test, and calculating the horizontal strain increment and the vertical strain increment; 3) introducing a stress dependence model of dynamic resilience mechanical characteristic parameters; and 4) performing parameter regression analysis, and determining model parameters to obtain a nonlinear dynamic resilience mechanical characteristic parameter prediction model including dynamic resilience modulus, Poisson's ratioand orthotropic parameters. According to the method, the model for predicting the dynamic resilience mechanical characteristic parameters of the aggregate under different stress states can be established, the dynamic resilience mechanical characteristic parameters under various stress states can be conveniently and accurately obtained, and the requirements of engineering construction are met.

The invention relates to a device, a system and a method of taxi charging. The method comprises the following steps of: current geographical position information at predetermined intervals is obtained; the accelerations in X, Y and Z axes of a vehicle are measured, and vehicle acceleration information is obtained; a cloud server obtains each parameter from a preset database; and according to the geographical position information, the vehicle acceleration information and each parameter, the paying amount is obtained by adopting a preset algorithm. Calculation parameters related to the invention are all obtained by automatic calculation of a cloud system and a control module, and the mileage of a taximeter is prevented from being manually adjusted; the vehicle driving mileage is obtained by a geographical positioning system, and the vehicle driving time and stop moments are precisely calculated by the acceleration measuring technology, so that the obtained mileage is more precise. The cloud server obtains high-instantaneity data in real time such as the current fuel oil price, the blocking index of a driving route and the empty vehicle index of a destination, so that the finally obtained paying amount is enabled to more accurately and reasonably reflect the cost and the value of the service.

The invention discloses a method for suppressing power oscillation of a virtual synchronous machine of an MMC interconnection converter. The method mainly comprises the steps of obtaining a voltage equation from the AC side angle of the MMC interconnection converter of an AC / DC hybrid microgrid, establishing a power output equation of the MMC interconnection converter, establishing a power regulation relational expression of the MMC interconnection converter, obtaining a virtual synchronous machine control mechanical equation and a virtual synchronous machine reactive excitation control equation based on a power transmission principle, solving a first-order derivative and a second-order derivative of the active power in the MMC interconnection converter power output simplification equation, obtaining a reference output power expression of the virtual synchronous machine, establishing a small signal model by the virtual synchronous machine by referring to the output power expression, carrying out Laplace transformation, and calculating a characteristic root of the small signal model, and acquiring a natural oscillation speed and a damping ratio of the system. the self-adaptive virtual inertia and the self-adaptive virtual damping coefficient are designed and substituted into a virtual synchronous machine control mechanical equation based on the power transmission principle, andthe effect of restraining MMC interconnection converter virtual synchronous machine power oscillation is achieved.

The invention relates to a data asset value evaluation model. evaluation factors of the model comprise asset cost factors, inherent value factors, market value factors and environment factors, and theasset cost is direct or indirect cost generated in the construction, operation and maintenance process of data and comprises construction cost and operation and maintenance cost; The inherent value is the value difference caused by the difference of the quality, scale and activity attribute of the assets in the transaction; The market value is the influence of market competitiveness, use objectsand historical transaction evaluation on the data value on the index data assets due to the market environment. The environmental factors comprise supply and demand relations, laws and regulations which influence the data value, and qualification and access mode external factors of the assessment organization.

The invention discloses a trade management method based on an industry operation management platform and an intelligent management system. The method comprises the following steps: setting the intelligent management system, wherein the system comprises a server and a client, and the server consists of one or more groups of classification management databases; setting the industry operation management platform, wherein the platform comprises member units which consist of a plurality of merchants and are managed in a hierarchical and right-based way; inputting merchant information into the intelligent management system in an industry classifying way, and effectively saving in a classification management database; recording and timely updating or sorting the trade details of the member units in the industry operation management platform by using the intelligent management system, converting all trade data values and saving; carrying out product trade behaviors under the restriction of the industry operation management platform according to different trade requirements by taking the industry operation management platform as a platform through the member units, and generating a price difference value in a step-by-step way, wherein the price difference value belongs to the industry operation management platform; checking the price difference value of the industry operation management platform periodically by using the intelligent management system, checking the common profit of the member units and allocating.

The invention discloses a design method of a tunnel mechanized construction power distribution scheme based on a drilling and blasting method. The design method comprises the following steps: firstlydetermining rated voltage Un and a power supply line design layout scheme of power utilization equipment through site inspection; computing the total Pe of the rated power Pn of all power utilizationequipment at the electricity consumption peak in various power supply lines, and then computing the active power Pc and reactive power Qc, apparent power Sc and current value Ic of each power supply line, and finally computing the total active power sum SigmaPc and the total current sum SigmaIc of various power supply lines, and determining the final assembly capacity of the transformer by the SigmaPc and the SigmaIC indexes dual-control way, thereby avoiding facility reactive loss and resource waste in the tunnel mechanized construction power distribution, and guiding the construction power distribution to adopt the power distribution scheme with the optimal energy consumption.

The invention discloses an intelligent streetlamp control method, including a light sensor, a duration recorder TS aiming at daytime or night in a day or several days in the past, a counter TC, a value comparator CC and a fixed frequency source OS, wherein the value comparator CC compares the size relationship between switch segmentation values TL1, TL2 ... TLn or AL1, AL2 ... ALn of the duration recorder TS and the time-base pulse value recorded by the counter TC to obtain the energy-saving control strategy of streetlamps, and thereby streetlamp switch control signals of K1, K2... Kn are obtained. According to the intelligent streetlamp control method, the switching on and switching off of the streetlamps can be effectively controlled without inputting absolute time and geographical information on the spot, and without configuring external and internal accurate clocks or calendars.

The invention discloses a method for preventing thermal power of a reactor core from exceeding a limiting value in a nuclear power plant. The method comprises the following steps: acquiring a measured value of high pressure cylinder inlet pressure in a steam turbine, and performing proportional-integral calculation on the measured value of high pressure cylinder inlet pressure and a constant value of the high pressure cylinder inlet pressure in the steam turbine; and acting the proportional-integral calculation result and a constant steam flow value on a power control loop, and controlling the thermal power of the reactor core not to exceed the limiting value by controlling the opening of a high-pressure cylinder valve by virtue of a steam turbine adjustment system according to the proportional-integral calculation result and the constant steam flow value. For a long time, the problem that the thermal power of the reactor core exceeds the limiting value cannot be effectively solved, so that potential hazards of the reactor core easily occur under instantaneous conditions. The constant value of the high pressure cylinder inlet pressure and the constant steam flow value are reasonably set, so that the thermal power of the reactor core is effectively and automatically controlled without exceeding the limiting value by controlling the opening of the high-pressure cylinder valve by virtue of the steam turbine adjustment system according to any one constant value of the constant value of the high pressure cylinder inlet pressure and the constant steam flow value, and hazards of the reactor core and the nuclear safety problem caused by that the thermal power of the reactor core exceeds the limiting value are solved.

The invention provides a method utilizing a trend surface form to generate an error correction surface. The method comprises steps that a well point correction value and the geological trend surface of each well are acquired; a trend surface value of the geological trend surface is calculated, and the corresponding relationship between the well point correction value and the trend surface value isestablished; a crossplot of the well point correction value and the trend surface value of each well is made, curve fitting is carried out, and fitting of a polynomial trend line is carried out to acquire a fitting polynomial; an initial correction surface is generated according to the polynomial acquired through fitting; error points of the initial correction surface are routinely gridded to generate residual errors, and residual error correction is realized; the residual error correction result is added to the initial correction surface to generate a final correction surface. The method isadvantaged in that the geological trend surface is added as the constraint, the new geological basis can be realized at the area without well control, the generated result is closer to geological expectation, and the method meets actual needs of producers.

The invention belongs to information security testing and evaluation technology, discloses a virulence and hazard analysis system for computer viruses, aims to test and evaluate the hazard of the computer viruses which comprise various malicious codes such as worms, Trojans and the like, provides a relatively perfect hazard testing and evaluation method, and provides quantitative reference indexes for virus prevention. The system introduces the idea of an analytic hierarchy process, and divides the aim of evaluating the computer viruses into two levels of hazardous factors; the system considers two user roles, allows professional users to set weights of each level of hazardous factors and requires the weights to pass positive reciprocal matrix property check and consistency check and provides a set of default weight vectors for the common users simultaneously; the system requires the users to set values for the second level of hazardous factors again; and the system acquires an estimated value of the hazard of the viruses through two levels of comprehensive fuzzy evaluation and gives a certain level in the five-level classification of the hazard of the viruses according to a maximum membership principle.

The invention brings forward a method for calculating layer speed and establishing an average speed field via a measurement plate method. The method comprises the following steps: time-depth material of wells and time curved surfaces of all control layers are obtained, layer speed of all control layers at well points is obtained, layer speed measuring plates are drawn, a via measurement plate function relation between time and layer speed at each layer is obtained, layer speed of each layer is calculated, a speed grid of each layer is generated, an average speed body scattered point set is calculated, and a three dimensional average speed field is generated via three dimensional gridding operation. According to the average speed field generated via the method disclosed in the invention, high precision can be achieved at positions with well control; at positions without well control, reasonable speed value can be placed; good effects can be exerted, data can be easily obtained, a small amount of time is needed for establishing the average speed field, and high efficiency can be realized; the method can also help solve a problem that the average speed field which is generated via a traditional method is large in probability of in deformation and distortion in conversion from time domain data to depth domain data.

The invention discloses a method for scanning adjacent regions, which comprises the following steps: calculating the maximum time T1 interrupted allowably for guaranteeing service quality, and the minimum time T2 required by scanning all adjacent regions; comparing the T1 and T2, determining the T2 as scanning duration if the T1 is more than or equal to the T2; otherwise, comparing the T1 and the minimum time T3 required by scanning an adjacent region, and determining the T1 as the scanning duration if the T1 is more than or equal to the T3; and scanning the adjacent regions according to the determined scanning duration. The invention also discloses a device for scanning the adjacent regions. The method and the device make the scanning duration have a reasonable value, ensure not to influence normal communication when cells are scanned, avoid the problem of resource waste caused by too long scanning duration, and also ensure that at least one adjacent region can be scanned in the scanning duration so as to avoid the problem that a reasonable cell cannot be selected.

The invention discloses an internal spline expansion sleeve structure for measuring jumping of speed reducers. The internal spline expansion sleeve structure comprises an internal ring, an external ring and a shaft. The internal ring comprises an internal ring flange and an internal ring conical head, a side of the internal ring flange is fixedly connected with a side of the internal ring conicalhead, and internal ring mounting holes are formed in the internal ring flange; the external ring comprises an external ring flange and an external ring conical hole, a side of the external ring flangeis fixedly connected with a side of the external ring conical hole, and external ring mounting holes and detaching threaded holes are formed in the external ring flange; the external ring conical hole can be arranged in internal splines of the speed reducers, the internal conical head and the shaft can be sequentially arranged in the external ring conical hole, and the internal ring mounting holes can be connected and fastened with the external ring mounting holes by bolts. The internal spline expansion sleeve structure has the advantages that the internal splines of the speed reducers can beconnected with the shaft by expansion sleeves, rotation of the internal splines of the speed reducers can be converted into rotation of the shaft, measurement on the machining precision of the internal splines can be converted into measurement on end surface jumping and seam allowance jumping of the speed reducers, accordingly, the internal spline expansion sleeve structure can bring conveniencefor measurement, is simple and is low in cost and convenient to detach and mount, and the measurement efficiency can be improved.

The invention discloses an earthquake liquefaction discrimination method and device suitable for fine-grained soil sand. The method comprises the following steps: obtaining a plasticity index of fine-grained soil in fine-grained soil sand to be discriminated; if the plasticity index is greater than or equal to the set threshold value, substituting the actual content of the clay content into a liquefaction discrimination formula for liquefaction discrimination; when the plasticity index is less than the set threshold value, substituting 3% of the clay content into the liquefaction discrimination formula for liquefaction discrimination. By using the method, the accuracy of fine-grained soil sand liquefaction judgment can be improved.

The invention discloses an oil and gas resource economy evaluation method. The method comprises the following steps: I, determining basic research parameters; II, objectively weighting the parameters;III, performing parameter standardization processing to eliminate dimension influence; IV, constructing a quantitative mathematical model; V, establishing and forming an economy evaluation key parameter prediction quantity plate, and realizing a visual economy quantity plate; VI, establishing a trend surface prediction graph of a known area; VII, solving economic benefit indexes of the evaluationarea. According to the method, the economic evaluation is carried out on the oil and gas resources by utilizing geological factors, a bridge between the geological resources and economic benefit indexes is built through an economic quantity edition, and a high-exploration-degree area with explored reserves is used as an analogy block. A relationship quantity plate is established according to theknown economic benefits and related geological parameters of the high-exploration-degree area, so as to carry out analogy evaluation on the low-exploration-degree area at the geological resource quantity level.

The invention discloses a timing signal based method for improving the clock precision. The method comprises the following steps of: (A) receiving timing signals and extracting a section of continuous timing signals T from the received timing signals; (B) measuring the timing signals T through a clock signal output by an adjustable clock and calculating a corresponding synchronism deviation delta T; and (C) adjusting the frequency of the adjustable clock through the synchronism deviation delta T. The invention also provides a system for improving the clock precision on the basis of the timing signals. The invention effectively reduces the influence of errors in the timing signals on the clock precision and obviously improves the clock precision.

The invention discloses a distribution network asset whole-process management evaluation method and system. The evaluation method comprises the following steps: S1, registering information of all assets; S2, determining a service node where the asset is located according to the existing service node; s3, evaluating the assets at each service node; S4, obtaining the whole process evaluation of theassets according to the evaluation of the assets at each business node; wherein in the step S4, the method comprises the following steps: step S41, calculating the importance I of each service node according to the situation that different assets experience each service node; and S42, obtaining the whole process evaluation of assets according to the importance I of each service node and the evaluation of each service node. According to the invention, the importance I of each service node is obtained according to the number of each service node experienced by assets, and the importance I is taken as the weight of each service node, multiplied by the score of each service node and then summed to obtain the total whole process evaluation, so that the score is more reasonable.

The invention provides a foam liner for electric appliance packaging. The foam liner for electric appliance packaging comprises an upper foam liner (1), a lower foam liner (5), a left foam liner (3) and a right foam liner (4); a groove is arranged in the center of each of the four foam liners, and the four edges of an electric appliance are wrapped with portions of the grooves; and the heights ofthe upper foam liner and the lower foam liner are increased, and the height of each foam liner wrapping the whole machine up and down is 1 / 2 or above of the height of the whole machine. The inventionprovides a panel television packaging design, particular, a design of an EPS foam liner for a panel television, and more particularly a structure design of the EPS foam liner for panel television packaging.

The invention relates to a backup method based on sector data. The method includes: obtaining several backup time intervals, obtaining an average time interval as a backup period, calculating the deviation degree of each backup time interval, presetting the standard deviation degree, and comparing each backup time interval. There is a relationship between the deviation degree of each backup interval and the standard deviation, and count the number of the former less than the latter. If the number exceeds half, the average interval is taken as the backup period; Prepend the backup files that have been backed up many times to obtain the number of prepended files. When backing up in the next backup cycle, the corresponding number of files in the backup log list are backed up according to the log content, and then check whether the next file needs to be backed up. If no backup is required, the backup ends. The invention saves the computing resources required for backup and improves the efficiency of backup.

The invention relates to an oil-containing alkaline wastewater treatment process and equipment. The process uses oil-containing alkaline wastewater and industrial acid water as raw material for the neutralization reaction. Qualified water after the neutralization reaction is pre-treated through an air floatation method, enters a biochemical reaction pool for the biochemical treatment when being cooled by a cooling tower and aerates in the biochemical pool. Oil in the water is degraded by microorganism. The sludge settlement treatment is implemented through a sediment pool to remove suspendersin the water. The wastewater after the sediment enters a biological filter again for the deep treatment to satisfy the discharging requirements. After the treatment, the index COD of the water is less than or equal to 80mg / l, SS is less than or equal to 10mg / l and oil is less than or equal to 5mg / l. With the biochemical technology used for the oil removal, the consumption of a system is reduced. With the biological filtration used as a deep treatment system, the consumption of ore fillers is reduced. The invention has the advantages of less investment, low operation cost, wide resource, sufficient reaction, good treatment effect, compact structure and convenient management.

The invention provides a satellite remote sensing reflectivity product data residual error correction method so as to quickly and effectively remove the remote sensing reflectivity product data residual error and improve the data precision of an ocean water color satellite product. A remote sensing reflectivity data residual spectrum relation reconstruction method is provided, and remote sensing reflectivity data residual spectrum characteristics are analyzed more simply and conveniently; in combination with a neural network technology, a method for extracting a spectrum slope coefficient of a residual error of remote sensing reflectivity data from satellite remote sensing reflectivity information is provided, and spatial and temporal variation characteristics of residual spectrum characteristics of the remote sensing reflectivity data of a satellite image can be described more finely; and the method is used for ocean water body remote sensing reflectivity product data residual error correction, remote sensing reflectivity products with more reasonable numerical values and more stable and reliable space-time distribution can be obtained, and production of high-precision water color products is supported.

The invention discloses a method for quantitatively evaluating the mixing condition of the alcohol precipitation process. The steps include: a first step, determining component A in the concentrated solution as a mixing condition indicator; a second step, measuring key indicators of the concentrated solution used for alcohol precipitation; The third step is to implement the alcohol precipitation process and obtain the alcohol precipitation supernatant, and record the key parameters of the alcohol precipitation process; the fourth step is to measure the key indicators of the alcohol precipitation supernatant; the fifth step is to use the formula to calculate the alcohol precipitation process and The ratio WMR of the ethanol solution to the fully mixed concentrate. The invention creates a quantitative evaluation method for alcohol precipitation and mixing conditions, solves the long-standing problem of indistinguishable alcohol precipitation package loss and precipitation loss, and provides a beneficial basis for improving the quality and efficiency of the traditional Chinese medicine manufacturing process.

The invention discloses a method for preventing thermal power of a reactor core from exceeding a limiting value in a nuclear power plant. The method comprises the following steps: acquiring a measured value of high pressure cylinder inlet pressure in a steam turbine, and performing proportional-integral calculation on the measured value of high pressure cylinder inlet pressure and a constant value of the high pressure cylinder inlet pressure in the steam turbine; and acting the proportional-integral calculation result and a constant steam flow value on a power control loop, and controlling the thermal power of the reactor core not to exceed the limiting value by controlling the opening of a high-pressure cylinder valve by virtue of a steam turbine adjustment system according to the proportional-integral calculation result and the constant steam flow value. For a long time, the problem that the thermal power of the reactor core exceeds the limiting value cannot be effectively solved, so that potential hazards of the reactor core easily occur under instantaneous conditions. The constant value of the high pressure cylinder inlet pressure and the constant steam flow value are reasonably set, so that the thermal power of the reactor core is effectively and automatically controlled without exceeding the limiting value by controlling the opening of the high-pressure cylinder valve by virtue of the steam turbine adjustment system according to any one constant value of the constant value of the high pressure cylinder inlet pressure and the constant steam flow value, and hazards of the reactor core and the nuclear safety problem caused by that the thermal power of the reactor core exceeds the limiting value are solved.

The invention discloses a high-voltage generator based on the series discharge of MOS tubes, which belongs to the technical field of electronics and high-voltage measurement, and the technical problem to be solved is how to overcome the disadvantages of traditional resistance step-down. Including: MOS tube series discharge circuit, which includes N voltage equalizing resistors and N series MOS tubes, a capacitor C is connected in parallel between the gate and source of each MOS tube, and the source and drain of each MOS tube The voltage limiting protection element MOV is connected in parallel between; the first end of the booster is electrically connected to the source of TN and connected to the output A, and the second end is electrically connected to the gate of T1; the first end of the current limiting resistor R is connected to the T1 The drain is electrically connected, and the second end is connected to the output B; the first end of the voltage stabilizing element W is electrically connected to the gate of T1; the first end of the anti-interference capacitor C1 is electrically connected to the gate of T1, and the second end is connected to the voltage regulator A second end of element W is electrically connected and connected to output B.

The invention relates to a process for treating alkaline waste water with oil by using ozone, which comprises the steps: the industrial alkaline waste water with the oil and industrial acid water is taken as material and neutralized; the flow is calculated by PLC through a mathematical model and the flow calculation is accurate; the air flotation is used to carry out pre-treatment and the water after the pre-oxidization is discharged into an ozone pool; the ozonation gas is exposed in the ozone pool and the strong oxidizability of the ozone is used for resolving the oil in the water; then, the oil is treated by the depth treatment from a contact oxidation tank, thus reducing the pollutants discharge in the water and meeting the requirements of the water discharge. Index of the discharge water: the oil is equal or less than 5mg / l, the COD is equal or less than 70mg / l, the SS is equal to or less than 10mg / l; waste alkali neutralization is calculated through PLC by mathematical model andthe flow calculation is accurate; the oil is removed by the ozone, thus reducing consumption of the system; the contact oxidization tank is used as a depth treatment system, thus reducing the consumption of ore filler and being able to start and stop randomly; the system has high intellectualization and can be intervened manually based on the experience. The invention has advantages of low investment, low operation cost, wide resources, complete reaction, favorable treatment effect, compact structure and convenient management.

The invention discloses an intelligent street lamp control method, comprising a photosensitive element, a duration recorder TS for day or night in the past day or several days, a counter TC, a numerical comparator CC, and a fixed frequency source OS, The energy-saving control strategy of the street lamp is obtained by comparing the value of each switch segment value TL1, TL2...TLn or AL1, AL2...ALn and the time base pulse value recorded by the counter TC by the numerical comparator CC. The street light switch control signals from K1, K2 to Kn are obtained. By adopting the present invention, the switch for controlling the street lamp can be effectively implemented, and there is no need to input absolute time and geographic information on the spot, nor to be equipped with an external or internal precise clock or calendar.

The invention belongs to information security testing and evaluation technology, discloses a virulence and hazard analysis system for computer viruses, aims to test and evaluate the hazard of the computer viruses which comprise various malicious codes such as worms, Trojans and the like, provides a relatively perfect hazard testing and evaluation method, and provides quantitative reference indexes for virus prevention. The system introduces the idea of an analytic hierarchy process, and divides the aim of evaluating the computer viruses into two levels of hazardous factors; the system considers two user roles, allows professional users to set weights of each level of hazardous factors and requires the weights to pass positive reciprocal matrix property check and consistency check and provides a set of default weight vectors for the common users simultaneously; the system requires the users to set values for the second level of hazardous factors again; and the system acquires an estimated value of the hazard of the viruses through two levels of comprehensive fuzzy evaluation and gives a certain level in the five-level classification of the hazard of the viruses according to a maximum membership principle.