139 results about "Time coefficient" patented technology

Based on the use of a coolant aqueous liquid, usually brine, maintained at low temperature in a reservoir receptacle, as low as −20° C. if the brine is of Sodium chloride or as low as −50° C. if it is of Calcium chloride, applied on the upper surface of the container, positioned horizontally, rotating about its axis, by means of soft jets, during a time which is calculated from the initial and desired temperatures, the temperatures of the cold solution and of the rinsing water and from the temporal coefficient of the packaged beverage, so that the brine glides over its surface drawn by the force of gravity, surrounding it completely through surface tension adherence to the surface of the container located underneath, where it is detached, determining at all times that the brine coats the greater part of the container during the spraying. By substituting the coolant liquid with hot water the rapid heating of packaged beverages is produced.

The invention discloses a method for coordinating and controlling quality change of coal in a supercritical once-through boiler unit. The method is used for building a boiler master control provided with balanced indirect energy, and comprises the following steps: quantifying coal quantity by load; quantifying primary air quantity by the coal quantity; confirming a dominant role of instructions of the boiler master control; jointly debugging the ratios of wind, water and coal to ensure that the superheat degree of the boiler meets the requirement; meanwhile, ensuring the control precision of the front pressure of the boiler unit to meet the requirements of a power grid for changing range and speed rate. The method mainly solves the problem that the unit runs fast while the boiler efficiency is low, and builds a novel static feedforward, a load dynamic feedfoward, a pressure dynamic feedforward, and dynamic corrections of the feedforwards based on quality change of coal; the linkage of wind, water and coal quickens the responsiveness of the boiler; the joint debugging of water and coal solves the problem of quality change of coal, realizes the decoupling of water and coal and the decoupling of main steam pressure and superheat degree; the linear real-time coefficient modifies various experience curves; and a main steam pressure regulator of the boiler master control is subjected to the variable parameter control.

The invention discloses an air conditioner with filter screen cleaning prompt function and a filter screen cleaning prompt method thereof. The method comprises the following steps that: a, speed meter detects the rotating speed of an internal motor and transmitting the rotating speed signal to a main controller; a timer starts timing and transmits a time period signal ti to the main controller; b, the main controller determines and selects a corresponding equivalent time coefficient beta i according to the rotating speed signal of the internal motor, calculates an equivalent time Ti=beta i *ti, and stores the equivalent time signal; c, when the rotating speed of the internal motor is changed, the steps a and b are repeated, the equivalent time signal is stored again, and the equivalent time signals are accumulated as T=sigma beta i*ti; and d, the main controller compares the equivalent time T with the set cleaning time T0 of the system; when the T is smaller than the T0, the main controller does not act; and when the T is greater than or equal to the T0, the main controller sends signals to a user interface to remind a user of cleaning the filter screen. The air conditioner is convenient to use, and is more favorable for human health.

The invention discloses a virtual battery management system and an application method thereof, belonging to the technical field of new energies. The virtual battery management system has the structure as follows: a central data processing unit is respectively connected with a man-machine interaction unit, a power battery emulation unit, a CAN (Controller Area Network) communication unit, a measuring unit and an electron load control unit. The virtual battery management system has the advantages that: firstly, the state and charging requirements of a charging object which is possibly encountered in the actual use process are integrated in one system; secondly, charging state information interaction between the virtual battery management system and charging equipment to be tested is realized; thirdly, the model parameters and time coefficients of the test type power battery can be adjusted, and the controllability and work frequency of the charging equipment are improved; and fourthly, the invention provides reference for the influence of the charging equipment on the power battery in the charging process of the power battery, and diversity of the charging loads and universality of the test environment of the charging equipment are realized.

The invention relates to a method of building synchronous signals in a communication system, comprising: defining a group of discrete fourier frequency coefficients; converting the group of discrete fourier frequency coefficients into discrete time coefficients; using the discrete time coefficients as the synchronous signals in the communication system. According to the embodiment of the invention, symmetry of the signals is fully utilized. Preferably, center frequency is not used in the transmission, namely DC carrier. The invention also relates to a transmitter and a received in the communication system.

The invention relates to a frequency support control method used for a doubly-fed wind generation set and based on two-stage power tracking optimization. The invention starts from optimization of frequency support dynamic characteristics of a wind generation set and provides a frequency support control method used for the wind generation set and based on two-stage variable proportion coefficient optimized power tracking. On the basis, a variable proportion coefficient control strategy in an inertial response stage is derived based on a virtual inertia time coefficient and a rotor movement equation, and for quick recovery of a maximum power tracking operation mode of the wind generation set after inertial support and avoiding secondary disturbance from being produced on system frequency adjustment in a recovery process, a variable proportion coefficient control strategy in a maximum power tracking operation mode recovery stage is designed by adopting fussy control. The frequency supportcontrol method provided by the invention has control robustness, a control structure is simple, engineering implementation is easy, and the quick recovery of the maximum power tracking operation modeof the doubly-fed wind generation set after inertial response and inertial support on a power grid frequency can be realized.

The invention relates to the field of spacecraft ground thermal tests and discloses a spacecraft thermal vacuum testing temperature control method. The method comprises the steps of measuring the position of a laser heating center with two thermodetectors with different measurement ranges at the same time to obtain average temperature T1 and average temperature T2 within two measurement ranges; taking the specific value T1/T2 of the two average temperatures as the setting parameter of a proportion and integral time coefficient in a PID controller, conducting real-time online setting on the proportion and integral time coefficient according to the change of T1/T2, and obtaining the change value of current heating power through the PID controller by means of the set coefficient; adjusting laser output power according to the change value. By the adoption of the method, under the condition that the overshoot of controlled temperature is reduced greatly, controlled temperature adjusting time is not increased, and the robustness and stability of a spacecraft thermal testing temperature control system are improved.

The invention discloses a seasonal precipitation analogue prediction method based on a seasonal prediction mode, and relates to the technical field of weather prediction of meteorology. The method comprises the following steps of according to historical seasonal mode prediction information, obtaining a mode prediction error principal component and feature vectors corresponding to the mode prediction error principal component; judging whether the mode prediction error principal component can be predicted or not; when the mode prediction error principal component can be predicted, performing the analogue prediction of a time coefficient; when the mode prediction error principal component cannot be predicted, evaluating the time coefficient, and combining the analogue prediction result and evaluation result of the time coefficient, and the feature vectors corresponding to the mode prediction error principal component, so as to form mode prediction errors; utilizing the mode prediction errors to correct seasonal precipitation mode prediction results. By adopting the technical scheme, the method has the advantages that the evolution information of prediction factors can be fully and effectively utilized, the time scale feature of the mode prediction is fully considered, and the working efficiency of prediction persons and the accuracy of prediction results are greatly improved.

The invention discloses a method and mobile terminal for measuring the network video transmission quality, and belongs to the field of communication, wherein the mobile terminal obtains the current video cache size C and the playing code rate P of a network video; whether the formula that C is less than or equal to aP is true or not is judged, wherein a is a time coefficient; if the formula that C is less than or equal to aP is true, the fact that video lag occurs is judged; and, if the formula that C is less than or equal to aP is not true, the fact that video lag does not occur is judged. By means of the method and the mobile terminal disclosed by the invention, whether lag occurs or not is judged by introducing the video cache size; therefore, the testing universality and the terminal measurement efficiency are effectively improved; and effective measurement on the network video transmission lag by terminal equipment is realized.

A method for optimizing provisioning workflows in cloud computing is provided. The method comprises determining a time coefficient for each resource type or aggregated resource types which define the installation time of a current workflow; accessing the current workflow and creating a tree topology based on the current workflow which defines serialized and parallelized provisioning steps; dividing the tree topology into independent sub-paths; determining a timing condition for an execution time of an optimized workflow; creating an optimized workflow template maintaining the timing condition by: selecting cheapest installation methods and cheapest resources; and reducing the parallelization of the tree topology; creating the optimized workflow by merging the optimized workflow template with data and the resource types of the current workflow.

A method for optimizing a digital filter that produces an output signal from samples of an input signal is configured with filter coefficients that are selected by a prescribed filter coefficient search. The filter coefficient search uses a pre-scaling constant or an additive constant with the filter coefficients and canonical signed digits to reduce filter cost or filter execution time. The coefficient search includes a precision for the filter coefficients and an allowable number of nonzero digits for each coefficient to produce a filter coefficient set with a reduced overall number of nonzero digits. The resulting filter can generally be implemented with substantially less integrated circuit die area than that obtainable with previous design approaches.

The invention discloses a video quality scoring method. The method comprises the following steps of S, obtaining a video playing quality score S and a video playing effective times E; S2, establishing a relation between a video playing time coefficient D and the video playing effective times E to obtain the video playing time coefficient D; S3, calculating the video playing quality total score T according to a formula as follows: T is equal to S*D; and S4, calculating the video quality score G according to a formula as follows: G is equal to T/E. The invention also discloses a video quality scoring system. By adoption of the scoring method, the influence of fraudulent scoring by users can be effectively filtered, relatively less algorithm calculated amount is required, and the burden of a server can be relieved.

A device stores in ROM white spot addresses, white spot levels, an OB level median, sensitivity, and time-in-second under dark shooting, a temperature coefficient correcting the white spot level according to the temperature under normal shooting, a sensitivity coefficient for the sensitivity-based correction, and a time-in-second coefficient for the exposure time-in-second-based correction. A temperature difference during shooting a subject is obtained according to the difference between OB level median during normal shooting and that during dark shooting. A correction value for the white spot level due to temperature is obtained from temperature difference and temperature coefficient, and similarly, correction value due to sensitivity is obtained from sensitivity difference and sensitivity coefficient, and correction value due to time-in-second is obtained from time-in-second difference and time-in-second coefficient for correction. Dark current is corrected by subtracting OB level median during shooting a subject from the video signal during shooting a subject.

The invention concerns a system for regulating the titer of a solution, which consists in adding in the solution a predetermined amount of a product contained in the solution in a time interval, called addition time interval, proportional to the product of the time coefficient D of degradation of said product in solution and to the total volume Vt of the solution at the time of the addition. The invention also concerns a device for controlling the regulation of the titer of a solution, said solution containing a product, comprising means (10) for controlling injection of a predetermined amount of said product into said solution according to a time interval, called addition time interval, proportional to the product of the time coefficient D of degradation of said product and to the total volume Vt of the solution at the time of addition.

The invention relates to a website vulnerability scanning method and apparatus, a computer device and a storage medium. The method comprises the following steps: reading a vulnerability scanning taskin a scanning task pool; searching a website corresponding to the vulnerability scanning task, obtaining access data of the website, and obtaining a popularity coefficient of the website according tothe access data; obtaining historical vulnerability scanning data and a vulnerability risk grade table, and obtaining a security risk coefficient of the vulnerability scanning task according to the historical vulnerability scanning data and the vulnerability risk grade table; obtaining updating time data of the vulnerability scanning task, and calculating a time coefficient of the vulnerability scanning task according to the updating time data; inputting the popularity coefficient, the security risk coefficient and the time coefficient in a preset priority evaluation model for processing to obtain an execution priority weight of the vulnerability scanning task; and executing the vulnerability scanning tasks in the scanning task pool according to the execution priority weights from large tosmall. The scanning effectiveness can be improved, and the scanning effect is improved.

The invention provides a calculation method for vertical displacement of immersed tunnel tube segments under a vehicle load. The method comprises the steps of simulating tube segments by adopting a Timoshenko girder, enabling a foundation to be equivalent to a series of spring elements and damper elements, which are connected in series, and building a tube segment-joint model, wherein each of an anti-shearing unit and an anti-bending unit in the joint model is formed by connecting a spring and a damper in parallel; and simplifying boundary conditions of the tube segments and considering the boundary conditions to be free-free, wherein the joint action is achieved through adding concentrated force and concentrated moment to the end parts of the tube segments, and the concentrated force and the concentrated moment on the adjacent end surfaces are equal in magnitude and opposite in direction. Through solving of a tube segment vibration mode function and building and solving of a tube segment power dynamic equation, an nth-order time coefficient as shown in the specification of a jth tube segment is solved by adopting a Newmark step-by-step integration method; and a vertical displacement response of any longitudinal position of each tube segment can be obtained by combining with a tube segment mode function.

The invention discloses a power transmission and transformation system risk early warning method. The method includes the following steps that: S1, a power transmission line risk assessment establishing overall framework is established, a risk assessment model is established according to each component of a power transmission line, the quantization of state quantities is established, and the degrees of membership of the state quantities are solved; and S2, a calculation method and an evaluation standard for the correction of the risk value of the power transmission line by the operating years and operating environment of equipment and the operation status of a power grid are determined, and the aging coefficients of the components, the operating environment time coefficient and geographical position coefficient of the power transmission line are defined. With the power transmission and transformation system risk early warning method of the invention adopted, an interval of the power transmission line, where a fault occurs, can be determined more accurately, fault inspection can be performed in a targeted manner, the inspection range of line fault inspectors can be decreased, line fault inspection time can be decreased, the cause of the fault of the power transmission line can be determined more accurately, and the efficiency of fault analysis can be improved.

The invention belongs to the hybrid energy storage technology field and relates to a method and system for stabilizing distributed energy source power fluctuation based on temperature and power control. According to the method, a variable filtering time coefficient is adjusted through fuzzy control and based on a real-time operation state of a heat pump and real-time charge states of a super capacitor and a storage cell; generation fluctuation power is distributed among the heat pump, the super capacitor and the storage cell through temperature and power control, and low frequency and medium high frequency components in power fluctuation can be respectively stabilized. The method is advantaged in that hybrid energy storage investment cost is reduced, service life of the storage cell is prolonged, system reliability and economic benefits are improved, and heat pump output components can be corrected through temperature control to satisfy comfort level requirements of users.