37 results about "Systematic deviation" patented technology

An approach for detecting an insider threat is described. Embodiments include determining one or more features from one or more network transfers among a plurality of network entities, determining a baseline behavioral profile of the plurality of network entities based on the one or more features; and determining at least one malicious network entity from among the plurality of network entities based on a systematic deviation from the baseline behavioral profile of at least one of the one or more features.

The invention relates to a new algorithm for correcting the sea and air gravimeter scale value based on the repeat line. The main technical characteristics are that a repeat measuring point scale value correction model is established according to the basic mathematic model of airborne gravity measurement; and the most probable estimation value of the scale value deviation is solved according to the principle of least squares and the sea and air gravimeter scale value is compensated. The formation mechanism of the sea and air gravity measuring system error is analyzed and the sea and air gravimeter scale value calibration error is discovered to be one of the main factors causing the systematic measurement deviation, the calculation model and the compensation method of using the repeat measuring line to detect and correct the sea and air gravimeter scale value are utilized, numerical verification is performed on the reasonableness and effectiveness of the method by using the actual airborne gravity observation network data, the test indicates that the algorithm has a significant effect for eliminating the sea and air gravity measuring systematic deviation, and the method is simple and can meet the requirements of the sea and air gravity measurement user.

The invention provides a wheat output predication method based on reversed regional climate mode data. By the observed historical daily meteorological data, the data of the daily maximum and minimum temperatures, the rainfall intensity, the rainfall frequency and solar radiation which are revised in a future regional climate mode are revised, so that the data of the regional climate not only keeps the original annular varying pattern, but also complies with the historical meteorological varying pattern of a station, to solve the problems brought about systematic deviation of simulation values and observed data of the regional climate, too few continuous drought days, difficulty in recurrence of high rainfall events, unmatching of time and space scale and the like. The further revised regional climate mode data are combined with a wheat growth simulation system, so that the prediction accuracy of wheat maturity day and wheat output is effectively improved, and the wheat growth simulation system is unified with the regional climate mode on the scale.

The invention discloses a reference circuit capable of being calibrated and used for a UHF RFID label chip. The reference circuit capable of being calibrated and used for the UHF RFID label chip comprises a standard reference circuit, a PTC (positive temperature coefficient) current calibration circuit and a reference voltage output calibration circuit, wherein the standard reference circuit comprises a PTC electric current generation circuit, an NTC (negative temperature coefficient) current generation circuit and a reference voltage output circuit, and a reference output voltage with the smallest deviation value is obtained by configuring a calibration code. The reference circuit capable of being calibrated and used for the UHF RFID label chip overcomes potential personal error and systematic deviation during the design process, obtains a relatively stable reference voltage value after being calibrated, provides guarantees for subsequently obtaining a stable clock and stable work of a digital module, and improves efficiency of the label chip. The reference circuit capable of being calibrated and used for the UHF RFID label chip achieves a relatively simple mechanism, and completes calibration work under the circumstance of not increasing power consumption.

The present invention relates to homologous system model method for quantitatively detecting bacterial endotoxin of blood, and aims at solving the problem of difference or interference caused by different system property. In the system model method, one new concept is proposed for solving the BET interference of the sample, i. e., all the unkown interference factors are considered as systematic deviation. Once the systematic deviation is eliminated, the said BET interference of the sample will be eliminated. In some reaction system, digital model is established and sample is detected in the same system, the difference caused by different system property will be eliminated.

The invention discloses a method for detecting copy number variation of tumor single-cell genomes. The method comprises the steps of separately performing genome sequencing on tumor single cells and aplurality of normal tissue single cells, performing comparing with a reference genome, and dividing window and standard window data; and using a normal single-cell comparison as a standard for removing systematic deviation to obtain genome copy number in all tumor single-cell regions. The method disclosed by the invention eliminates some specific system deviation introduced by different single-cell amplifying techniques, so that the accuracy of copy number variation detection of the tumor single-cell genomes can be improved, and the method has important significance in detecting driving incidents relevant with copy number variation and reading tumor genome evolution information.

The invention discloses a distributed opportunistic array radar time synchronization method. According to the method, in a group, intra-group time synchronization is performed with co-view satellitesin the group adopted as references, so that systematic deviation between intra-group nodes can be eliminated; in a region, one intra-group co-view satellite is adopted as a common regional co-view satellite, so that the systemic deviation between inter-group nodes can be eliminated; and the high-precision time synchronization of each node in the entire region is achieved. In a distributed opportunistic array radar, each opportunistic subarray can be used as a node, and the high-precision time synchronization of the entire distributed opportunistic array radar is realized with the time synchronization method of the present invention.

The invention relates to the technical field of heat dissipation of servers, and provides an intelligent fan regulating method and system applied to universal fan types. The method comprises the stepsthat systematic deviation E and a deviation variation rate value EC are calculated; the systematic deviation E and the deviation variation rate value EC are subjected to fuzzing processing, and threecorrections of sigma Kp1, sigma Ki1 and sigma Kd1 of PID control parameters of a PID control algorithm are calculated and obtained; PID parameters of Kp, Kd and Ki are generated; the PID parameters of Kp, Kd and Ki are designed as weighted values of a PID control algorithm of a PID controller, and a control signal used for intelligently regulating the rotational speed of a fan is generated, therefore PID intelligent regulating of a server fan is achieved, manual adjusting wasting time and labor is avoided, and it is ensured that all elements and devices of the server work within a safe temperature value range.

The invention provides a tuning method for a verification criterion of a periodic test of an overtemperature and overpower circuit protection channel of a nuclear power plant. The method comprises the steps of: according to an accident working condition, simulating an accident working condition signal collected from a site; obtaining a function of an input voltage obtained by calculation of a threshold value module in a time domain in the accident working condition; when the input voltage reaches a threshold value voltage, triggering the threshold valve module in the accident working condition to act; and then obtaining a time range and a voltage range, in which the accident working condition is triggered to act according to systematic deviation of the whole protection channel: Tmax, Tmin and Vmax, Vmin, thereby providing the verification criterion of the periodic test of the overtemperature and overpower circuit protection channel of the nuclear power plant.

The invention discloses a radian testing device for a battery diaphragm. The radian testing device comprises a test table, a tension mechanism, a radian measuring scale, two sets of compression mechanisms and two locating blocks. The two sets of compression mechanisms are arranged at the two ends of the test table respectively, the two locating blocks are arranged beside the two sets of compression mechanisms respectively, the tension mechanism is arranged between the two compression mechanisms, and the radian measuring scale is arranged between the two sets of compression mechanisms. When the radian testing device is used, the diaphragm is paved on the test table and is located by the two locating blocks first, the two sets of compression mechanisms tightly compress the two ends of the diaphragm respectively, the tension mechanism presses the diaphragm to provide simulation tension for the diaphragm, and then the radian is read through the radian measuring scale. The measuring principle of forming one line through two points is adopted, the systematic deviation is small, and the test precision is improved. In addition, the tension mechanism simulates the practical situation, so that the measured radian has more reference significance. The uniform measuring device is adopted for testing the radian of the diaphragm, the uncertain factors caused by artificial participation are few, and therefore, the measuring accuracy is improved while the measuring efficiency is increased.

A method for reducing interference caused by phase noise in a radar system is described in particular, in which a first signal (sigTX1) is generated in a first non-coherent transceiving unit (NKSE1) and is transmitted, in particular emitted, via a path (SP), a first signal (sigTX2) is generated in a further, in particular second non-coherent transceiving unit (NKSE2) and is transmitted, in particular emitted, via the path (SP), the signals (sigTX1 and sigTX2) are directly or indirectly received in the respective other transceiving stations and are processed there as reception signals sigRX12 and sigRX21, a comparison signal (sigC12) is formed in the first transceiving unit (NKSE1) from its first signal (sigTX1) and from such a first signal (sigTX2) received from the further transceiving unit (NKSE2) via the path (SP), and a further comparison signal (sigC21) is formed in the further transceiving unit (NKSE2) from its first signal (sigTX2) and from such a first signal (sigTX1) receivedfrom the first transceiving unit (NKSE1) via the path (SP), wherein the further comparison signal (sigC21) is transmitted, in particular communicated, from the further transceiving unit (NKSE2) to thefirst transceiving unit (NKSE1), wherein in a first step deviations of the signals sigC21 and sigC12 which are caused by systematic deviations in the transceiving units (NKSE2, NKSE1) are compensatedfor, wherein in a second step at least one complex value from a first of the two comparison signals or from a signal which has been derived from this first comparison signal is used to adapt at leastone complex value of the second of the two comparison signals or a value of a signal which has been derived from this second comparison signal and to therefore form a signal (sigCC), wherein the adaptation is carried out using a mathematical operation to form the vectorial sum or the difference of the complex values or the sum or the difference of the phases of the complex values.

The invention relates to a three-dimensional laser scanning calibration method simultaneously constrained by point and surface characteristics. The method comprises the following steps of (1) acquiring scanning observation values and reference true values of point and surface targets and carrying out three-dimensional registration and gross error detection on two target point sets, (2) taking a registration conversion parameter as an initial pose parameter and describing a systematic deviation between an observed value and a reference value by adopting an error model, (3) setting a system error parameter to be zero and carrying out least square estimation on the system error parameter and the initial pose parameter to obtain an optimized pose parameter and an observed quantity weight, (4)performing optimal estimation on the system error parameter and the pose parameter by using a parameter condition adjustment model with parameters and with a point and a surface as constrain conditions, and (5) correcting the scanning observation value by using the estimated parameters, counting a deviation between the observation value and the reference value before and after correction by usingmathematics, and evaluating improvement precision and degree. Compared with an existing method, the method of the invention has the advantages that various constraints are integrated, all parameters are optimally estimated at the same time, the accuracy is good, the precision is high, and the operation is easy.

The invention provides a method for obtaining thermal aerodynamic performance of a flying aircraft. Based on the idea of interface division, the whole flying aircraft interface is divided into an engine interface and an aerodynamic interface, cold aerodynamic performance data of the flying aircraft are superimposed on cold and thermal state difference of the engine interface and cold and thermal state difference of the pneumatic interface as thermal state aerodynamic performance of the flying aircraft, and a problem that thermal performance is difficult to obtain at present is solved in the prior art. The method is advantaged in that data accuracy is guaranteed by wind tunnel test data as a baseline, moreover, cold and thermal state difference of the engine interface and cold and thermal state difference of the pneumatic interface instead of the absolute amount are obtained through CFD calculation, systematic deviation between CFD calculation and the test is avoided, and data accuracyis guaranteed.

The invention discloses a mounting method for a camera of a picking machine and a telescoping mechanism of the camera. The camera is mounted on a telescoping mechanism which can be folded up, and the position of the camera can be changed through the folding and unfolding of the telescoping mechanism, so as to realize visual gathering of a stand object. The telescoping mechanism mainly comprises the following components, namely a transmitting device, a machine rack, an electromotor, a machine rack cross beam, a section arm I, a section arm II and telescoping and guiding devices arranged on the two sides of the telescoping mechanism, and the telescoping and guiding devices, through the rotation of the electromotor, drive the length of the steel wire to change and realize space position change of the telescoping mechanism of the camera accordingly; the mechanism provided by the invention is convenient to operate, high in environmental adaptability, facilitates timely adjusting of systematic deviation between the mechanism and a camera connected there with, and is simple in structure, convenient to control and maintain, and high in practicability, and the replacement of the hydraulic oil tank with the pulley group greatly saves manufacturing cost. The mechanism can not only be applied to fruit picking machinery, but also be applied to small machinery utilizing telescoping mechanisms.

The invention discloses a method for determining acetic acid delta 13C value in a fruit vinegar beverage by using liquid chromatography-stable isotope ratio mass spectrometry, which belongs to the technical field of stable isotope analysis. The method comprises the following steps: 1) preparing an acidic mobile phase for a liquid chromatogram component; 2) adjusting the liquid chromatography-stable isotope ratio mass spectrometry to a work state; 3) determining the delta 13C value of the acetic acid in a known substance and a sample under the same condition; and 4) obtaining the delta 13C value of the acetic acid in the sample according to the systematic deviation of an apparatus. The method has the characteristics of simple operation, convenient calculation, and stable and accurate determination (the determination standard deviation is only 0.01%), and provides the assistance for promoting a stable isotope technology in adulteration detection of a fruit vinegar beverage product and is good for safety of food in our country.

The invention offered a method to design combined library of samples, which facilitated people to reduce the frequency of sample experiments and increase effective amount of information in fixed frequency of sample experiments by applying acquired knowledge and given assumption extremely. The steps of this method were as follows: (1) Many components to compose samples were supplied. (2) Variables were offered for each component, which were sampled at intervals. (3) At least one constraint condition was set for at least one variable. (4) Pseudo-samples were produced. (5) Pseudo-samples were checked to confirm whether they were qualified samples. (6) Steps (4) and (5) were repeated until at least one qualified sample was found. The method of this invention was efficient and accurate, which could avoid system deviation in sample design.

The invention discloses a method for measuring delta 13C values of benzoic acid in milk in an online manner, particularly relates to methods for applying liquid chromatograms-stable isotope ratio mass spectra to measuring delta 13C values of benzoic acid in milk in an online manner, and belongs to the technical field of stable isotope analysis. The method includes steps of 1), selecting appropriate liquid chromatographic columns; 2), preparing acidic mobile phases; 3),adjusting liquid chromatograms-stable isotope ratio mass spectra until the liquid chromatograms-stable isotope ratio mass spectra are in work states; 4), adjusting the concentration of benzoic acid in samples; 5), automatically injecting the samples by the aid of an automatic sample injector and measuring measured delta 13C values of the benzoic acid; 6), correcting measurement systematic deviation of instruments by the aid of reference materials with known delta 13C values; 7), computing the delta 13C values of the benzoic acid according to the systematic deviation. The method has the advantages of simplicity in operation, convenience, low detection limit and stable results. Besides, dependence on manual sample injection operation can be prevented, and the delta 13C values can be continuously analyzed for 24 h.

The invention provides a film parallelism control method and device in imprinting equipment, and the method comprises the steps: obtaining a deviation signal in the operation process of a film as an input variable, and judging whether the system deviation in the deviation signal is smaller than a preset deviation threshold value or not; if yes, integrating the input variables in a preset time period, obtaining a deviation control quantity according to an integration result, and eliminating deviation through the deviation control quantity; if not, defining an input and output fuzzy set, and solving a fuzzy division table of the input and output variables according to the input and output fuzzy set; determining a fuzzy relation matrix according to the fuzzy division table and a preset fuzzy calculation rule; inputting the input variable into the fuzzy relation matrix, solving the fuzzy control quantity, and eliminating the deviation through the fuzzy control quantity and the deviation control quantity. Errors continuously generated in the operation process of the thin film are calculated through the fuzzy algorithm, accumulated errors caused by control quantity calculation through a mathematical formula are effectively eliminated, and parallelism control stability is improved.

The invention discloses a method for calibrating moon elevation model by utilizing selenographic laser reflection array coordinate; the method comprises the following steps: using laser height measurement data to establish a moon elevation model; calculating a selenographic laser reflection array precise elevation value; calculating a systematic deviation average value of the moon elevation model; correcting the deviation of the moon elevation model. By utilizing the technical scheme, the systematic deviation of the elevation model can be effectively removed, and the moon elevation model can be precisely obtained.