39results about How to "The calculation method is reasonable" patented technology

The present invention discloses a calculation method for calculating the thickness of the loosened zone of the soft coal and rock of a deep roadway and a measurement device based on the method. The calculation method comprises the steps of (1) defining the distance between the initial position of a measuring point and the surface of a roadway to be r and the displacement of the measuring point to be u, and constructing an expression of u varying with r, wherein the measuring point is in the drill hole of the soft coal and rock of the deep roadway and is within the range of the loosened zone, u0, k1 and k2 are coefficients; (2) measuring the varying process of the u of more than two measuring points along with r, and calculating the values of k1 and k2; (3) inputting the obtained values of k1 and k2 into the following equation of L=-k2ln(20k2 / k1), and calculating the value of the thickness L of the loosened zone of the soft coal and rock of the deep roadway. The calculation method is simple, reasonable and easy to implement, and high in calculation accuracy. Obvious errors caused by the empirical estimation can be avoided. Meanwhile, the measurement device is simple in structure and convenient in operation, which can be well be applied to the calculation method of the present invention. In this way, the engineering detection on the thickness of the loosened zone of the soft coal and rock of the deep roadway and the real-time display of the thickness are realized.

The invention discloses a build-in length and uplift value calculating method applicable for a narrow foundation pit. The calculating method comprises the step (1) of judging whether a foundation pitis the narrow foundation pit, a supporting structure of the foundation pit comprises support piles and inner supports, if the ratio of the foundation pit depth to the foundation pit width is larger than 1, and the influence of frictional resistance between the supporting structure and soil mass in the pit on the stress and deformation state of the soil mass in the pit prevails, the foundation pitis the narrow foundation pit; and the step (2) of obtaining the build-in length of the foundation pit according to the condition that the unloading stress of the bottom surface position of the foundation pit is equal to the frictional resistance between the soil mass at the position and the supporting structure when the pit is evacuated to the pit bottom in one time. According to the method, the interaction between the supporting structure and the soil mass is introduced; and the method can reflect the influence of the soil mass property on the build-in length and the uplift value fully, and can be applied to foundation pits of any shape.

The invention relates to a water turbine in a hydropower station, and discloses a calculation method for the cavitation coefficient of a vertical-axis axial-flow paddle-type hydraulic turbine power station, which can more reasonably calculate the cavitation coefficient of a vertical-axis axial-flow paddle-type hydraulic turbine power station to meet new hydropower engineering requirements. The inventive method is as follows: determine the specific rotational speed of the axial flow propeller type water turbine, and described specific rotational speed is denoted as n s ; Determine the maximum application head of the axial flow paddle turbine, and the maximum application head is denoted as H max , and judge H max range; according to H max The formula for calculating the cavitation coefficient of the power station in the corresponding range calculates the cavitation coefficient of the power station, and the cavitation coefficient of the power station is denoted as σ p , the formula for calculating the cavitation coefficient of the power station in the range is: when H max ≤30m, when H max When the distance is greater than 30m, the present invention is applicable to the calculation of the cavitation coefficient of a vertical-axis axial-flow paddle turbine power station, and can better meet the requirements of new hydropower projects.

The invention discloses a calculation method for the second lining support structure of a super-large-span cavern, which comprises the following steps: a. obtaining the upper limit value of the deformation of the cavern by performing fitting analysis on the monitoring measurement data; b. calculating The remaining deformation of the cavern; c. Calculate the sliding force and anti-sliding force of the unstable block above the cavern; d. Calculate the pressure of the unstable block acting on the second lining support structure; e. The remaining deformation and the acting pressure of the unstable block are used as input conditions, and act on the second lining support structure at the same time, and the stress state of the second lining support structure is obtained through the calculation software. In the present invention, the remaining deformation and the acting pressure of the unstable block are used as input conditions to calculate the secondary lining support structure, which conforms to the deformation characteristics and stability mechanism of the super-large-span cavern; the thickness of the secondary lining support structure obtained by the present invention is reasonable, It avoids problems such as increased cost, difficulty in pouring, and extended construction period caused by the excessively large lining thickness of the super-large-span cavern.

The invention relates to a method for calculating the impact factor of books that can be lent out by a library, which can effectively solve the problem of book circulation data basis and guide readers to read reference basis in library management. The data can be brought into the formula to get the influence factor If of books that can be borrowed by the library in the current month. The method of the present invention is connected with various management systems of the library and used for database data extraction and recording. The method is novel and unique, the calculation method is reasonable, and it has statistical It can be used for big data statistics and network development, it can be used to grasp the reading life of newly released books, it can be used to make statistics on readers' reading hotspots, and it is a reference for book management, publishing, reading, purchasing, etc. Innovations in Computational Methods.

The invention provides a pruning evaluation method based on fruit tree canopy illumination calculation. The method includes: in each of the two years in the first N years of the pruning evaluation year, after the same spring pruning and germination of the sample tree and the tree to be tested, the three-dimensional point cloud data of the sample tree canopy are obtained in different position cubes The number of box counting dimensions in the grid and the light intensity or relative light intensity in each of the cube grids of the sample tree in the stable period of the leaf curtain establish a mathematical model; the leaf curtain of the tree to be measured in the current year is predicted and pruned by the mathematical model The results of light intensity or relative light intensity distribution in the stable period can be used to evaluate whether the fruit trees are pruned reasonably. The method has the advantages of rapidity, convenience, reasonable calculation method, high accuracy, and is suitable for automatic programming, and can also greatly improve operation efficiency and reduce labor intensity of operators.

The invention relates to an ancient document unified logical retrieval method based on index relation, in particular to the logical combination of any logical relations contained in an input text string extracted from text retrieval, and belongs to the technical field of document retrieval. The logical retrieval method concretely comprises the steps of constructing an index system, counting the number of times of a sentence appearing in a fixed sentence length, establishing corresponding rules for logical relations, extracting the logical relation contained in an input text string, and combining rules thereof; displaying results and outputting the six technical steps. According to the logical retrieval method, different retrieval requirements of the user can be satisfied based on the understanding for the logical relation, and user experience is greatly improved.