40results about How to "Avoid Conversion Errors" patented technology

The invention relates to a helical-gear precise modeling method involving tooth alignment errors. The helical-gear precise modeling method comprises the following steps that (1) a tooth profile equation of a cutter is obtained according to the structure of the rack cutter; (2) according to the forms of the errors and a motion law, a cutter tooth surface equation involving helical line inclination and shape errors is obtained through coordinate transformation; (3) according to the error cutter tooth surface equation and a gear meshing law, a meshing equation is obtained; (4) according to the meshing equation and the error cutter tooth surface equation, a tooth surface equation involving helical line inclination errors and shape errors is obtained; (5) tooth surface discrete points are obtained and processed so that the tooth surface discrete points can be directly read into finite element software, and a helical gear finite element model is built. According to the helical-gear precise modeling method, the helical gear tooth surface equation involving the tooth alignment errors is directly derived according to an error cutter equation, hybrid programming is conducted through mathematical software and the finite element software, the helical gear finite element model involving the tooth alignment errors is built in a parameterized mode, modeling efficiency and precision are improved, and the workload of calculation and analysis is reduced.

Belonging to the technical field of hydrometallurgical equipment, the invention relates to an acid adding device with an accurate and automatic pH value control function. The device comprises an acid solution storage tank (2), an acid solution distributor (10) and an acid solution control system. The acid solution distributor (10) is installed inside a reaction container (5). The acid solution storage tank (2) is arranged at a position higher than the acid solution distributor (10), and is in connection with the acid solution distributor (10) through a hand stop valve (4), an electric butterfly valve (6), an infusion tube (7) and a movable sleeve (8) in order. By employing an advanced on-line real time control technology, the device provided in the invention generates no acid fog while adding a high concentration acid solution, and has the advantages of high pH value control precision, low labor intensity, simple structure and reliable operation.

The invention relates to a continuous collection device for volatile ammonia gas in field soil and a method for determining the loss amount of nitrogen in the soil by using the same. The device comprises an ammonia gas collector, an ammonia gas recycling device, a connection pipeline for connecting the ammonia gas collector and the ammonia gas recycling device, and an automatic temperature control device for regulating an internal temperature and an external temperature of the ammonia gas collector. Through measurement, collection and comparison of the internal soil temperature and the external soil temperature of the device, the internal soil temperature of the device can be automatically regulated, so the internal soil temperature and the external soil temperature of the device are kept consistent, and the effect of too large temperature difference on result authenticity is avoided. At the same time, with the use of a reaction principle of NH3 and sulfuric acid, a gas diffusion theory and an excess collection liquid, the soil volatile ammonia gas can be ensured to be continuously and completely collected. The device not only can be used for long-term continuous collection of the volatile ammonia gas in the field soil, can relatively accurately reflect the effect of the soil ammonia gas volatilization on the loss of nitrogen in the soil, but also has the characteristics of simple structure, easy operation and relatively low labor cost.

This invention relates to Richter hardness basic device, which comprises the following: base socket on the workbench; impact part with tungsten carbide ball head; guiding cylinder to control the impact part radium direction; impact part lift clamper structure; control device; speed test device and data collection device, wherein the impact part gets energy form the gravity and the speed test device adopts the laser Doppler speed test system.

The invention discloses a tool for detecting the hole and end face perpendicularity, and belongs to the technical field of machining detection devices. Three positioning blocks for axial positioning installation of an inner diameter face of a workpiece hole to be detected are circumferentially arranged on a test tool body, wherein at least one positioning block is arranged on the test tool body in the mode of being capable of being adjusted in the radial direction. A test gauge capable of rotating around the axis is further arranged on the test tool body. The axis formed by the three positioning blocks and the rotating axis of the test gauge are parallel or coincide with each other. The hole and end face perpendicularity test tool is ingenious in concept, the axis of the workpiece hole is used as the detection positioning reference creatively, the end face is used as a detection element, data obtained through detection are hole and end face perpendicularity tolerance values, detection is rapid, operation is easy and convenient, and data are visual and efficient; when the test tool is used for connecting rod end face perpendicularity detection, the detection positioning reference and the detected element coincide with the connecting rod design reference, the problem that a traditional test means is influenced by connecting rod hole shape errors is avoided, and the detection precision is greatly improved.

The invention discloses a method for determinacy shape correction processing based on the surface shape error slope. The method comprises the first step of inputting the surface shape error slope and a height removal function of a to-be-processed optical part; the second step of converting the height removal function into a slope removal function; the third step of utilizing a deconvolution calculation method to calculate a dwell time function according to convolution relations of the slope removal function, the surface shape error slope and the dwell time function required for determinacy shape correction processing control; the fourth step of performing the determinacy shape correction processing on the surface of the to-be-processed optical part based on the calculated dwell time functions. The dwell time necessary for the processing control is calculated by directly using surface shape error slope data obtained through measurement, the surface shape error slope does not need to be converted into the surface shape error height, so that the conversion error caused by the fact that the surface shape error slope is converted to the surface shape error height is avoided, and the method is favorable for improving the determinacy in the processing process and improving processing accuracy.

The invention relates to a concentration analysis method. The method comprises the following steps: pretreating a sample to be measured; converting an element to be measured into a gaseous compound; introducing the gaseous compound of the element to be measured into a multi-reflection spectral absorption cavity through carrier gas; detecting the attenuation of the laser power in the cavity to obtain a gas laser absorption spectral line; calculating the concentration of a gaseous compound of the element to be measured. In the method, a molecular absorption spectral line is directly adopted for analyzing without using consumable instruments such as a chromatographic column or accessories such as an atomization furnace or an ionization furnace or being interfered with background absorption and fluorescence. In the method, the absolute absorption of light is analyzed by using the sample without frequently making a standard measuring curve as being done for an atomic spectra and the like, so that the measuring flow can be simplified, and the scalar period can be prolonged on a large scale to realize instant measurement, so that the automation and the convenience in measurement are realized. The method has the advantages of high analysis speed, low equipment cost, high sensitivity and accurate measurement.

The invention discloses a geometric spline-based linear projectile model modeling solving method, which comprises the following steps of: expressing a boundary of a linear projectile problem as a geometric spline of a linear combination of a control vertex and a primary function with geometric significance by using parameters, and finishing modeling; taking a geometric spline primary function withthe same boundary representation model as a shape function of displacement and surface force in a boundary integral equation of the linear projectile problem, obtaining a linear equation set throughthe discrete boundary integral equation, building a stiffness matrix and solving to obtain the displacement and the surface force of a boundary control vertex; according to the method, the physical domain boundary of the 2D line projectile problem is modeled through the geometric spline, an accurate conversion method represented by a common model is provided, and the approximation error of the common boundary model in the modeling stage is avoided; a geometric spline basis function is adopted in a boundary integral equation to serve as a shape function for describing boundary physical quantity, and the model conversion time is saved.

The invention discloses a multi-phase state estimation method of a power distribution network. The method comprises the following steps that S1) an error mode and a measurement equation of a state estimation and measurement model are established; S2) multi-phase network constraints of state estimation are established; S3) according to the multi-phase network constraints and the state estimation and measurement model, a state estimation model is established; and S4) on the basis of the established state estimation model, iteration optimization is carried out, and multi-phase state estimation of the power distribution network is realized. The method can be used to avoid conversion error caused by indirect measurement, the calculating efficiency is high, an estimation result is relatively accurate, and the method can be widely applied to state estimation industries of the power distribution network.

The invention relates to a system and method for programming an automation system. To avoid conversion errors and to guarantee data during the programming of an automated system, a graphic description by means of pulse timing diagrams is used to generate a program of the automation system, in particular the program of a memory programmable control. Modifications of the pulse timing diagrams thus lead directly to modifications of the program of the memory programmable control, without the need for a renewed conversion that potentially contains errors.

The invention relates to a corpus correction method and device, computer equipment and a computer readable storage medium. The corpus correction method comprises the steps of obtaining a text corpus which comprises a to-be-corrected corpus; segmenting the text corpus according to the position of the to-be-corrected corpus in the text corpus to obtain a target corpus segment comprising the to-be-corrected corpus; and replacing the to-be-corrected corpus in the target corpus segment with a corresponding silent pinyin adjusting corpus, and inputting the replaced target corpus segment into a namedentity recognition model to obtain a correction label of each corpus in the target corpus segment. By adopting the method, the conversion accuracy when the voice content is converted into the text result can be improved.

The embodiment of the invention discloses a control method of a food processor. The control method comprises the steps that when it is detected that a user approaches the food processor, it is detected whether or not the user is still located within a detection range of the food processor within first preset duration, and the discharging gesture of the user is detected within the first preset duration; when it is detected that the user is still located within the detection range within the first preset duration, and the discharging gesture of the user is detected, a cup cover of the food processor is automatically opened; within second preset duration after the cup cover is automatically opened, it is detected whether or not materials are put in the food processor; if yes, after the reminding of a box cover, the cup cover of the food processor is automatically closed. According to the control method, before the cup cover is controlled to be opened or closed automatically, delayed verification is conducted on a control signal, the reliability of controlling the cup cover is ensured, the problems that when a sensor breaks down or detects that the user passes by the food processor, the cup cover is opened accidentally are avoided, and the phenomenon of clamping hands is avoided.

The invention provides a nuclear magnetic resonance relaxation time and pore throat radius conversion method, and relates to the technical field of oil and gas exploration and development. The methodis used for solving a technical problem that an error is large when nuclear magnetic resonance relaxation time is converted into a pore throat radius. The conversion method comprises the following steps: obtaining a nuclear magnetic resonance T2 spectrogram of a rock core sample before a centrifugal experiment and a nuclear magnetic resonance T2 spectrogram of the rock core sample after differentcentrifugal experiments, and calculating relaxation time cut-off values according to the nuclear magnetic resonance T2 spectrogram before the centrifugal experiment and the nuclear magnetic resonanceT2 spectrograms after the centrifugal experiments to obtain the plurality of relaxation time cut-off values; calculating pore throat radius values according to the centrifugal force values in the different centrifugal experiments to obtain a plurality of pore throat radius values; and fitting the plurality of relaxation time cut-off values with the plurality of corresponding pore throat radius values, measuring the same rock core sample so that conversion errors caused by difference of the rock core samples are avoided, directly fitting the relaxation time cut-off values with the pore throat radius values, and reducing the conversion errors caused by conversion by a high-pressure mercury injection method.

The invention discloses a multi-channel communication sharing device and method. The device includes an RS485 interface, a UART interface, a WIFI interface and a first signal control isolation unit, and the output end of the RS485 interface and the first input end of the first signal control isolation unit Connection, the output end of the UART interface is connected with the second input end of the first signal control isolation unit, the output end of the first signal control isolation unit is connected with the input end of the WIFI interface; the first input end of the first signal control isolation unit is connected to A forward diode is connected in series between the output terminals, and a forward diode is also connected in series between the second input terminal and the output terminal of the first signal control isolation unit; the method utilizes the above-mentioned device to share the communication signal. Compared with the prior art, the present invention not only can connect different interfaces in parallel to meet the requirement of multiple terminals using different communication interfaces in parallel, but also ensures the conversion efficiency of communication signals and effectively reduces cost input.

The invention relates to a method and device for determining the corresponding relation between the engineering quantity and the quota and electronic equipment, and the method comprises the steps of obtaining one piece of engineering quantity; obtaining each piece of quota data in a quota database, wherein the quota data comprises a quota identifier and a keyword group corresponding to the quota identifier; and based on the keyword group, determining a corresponding relationship between the project quantity and the quota data. According to the technical scheme, the problems that the manual quota application workload is large and errors are prone to occurring can be solved, the working efficiency and quality are greatly improved, the labor cost is saved, and meanwhile engineering quantity unit conversion errors can be avoided. In addition, no matter how the format of the professional engineering quantity changes, the quota application of the engineering quantity is not influenced. And the same professional quota core keyword group quota database among different projects can be shared, so that the self-perfection and updating of the core database can be continuously realized.

The invention belongs to the technical field of psychological health, and discloses a psychological health education system based on a virtual display technology, which is provided with a computer, aninternet interaction module, a stereo module, an environment simulation module, a perception simulation module and a virtual reality interaction module, The user and the far-end psychological healtheducation counseling expert carry out illness state interaction; the simulation module simulates multiple perceptions to increase the presence of a user, and the user feels the true degree of existence of the user in the simulation environment as a main angle. The method has interactivity, and the user can operate objects in the simulated environment and obtain the natural degree of feedback fromthe environment; the autonomy is increased, objects in the virtual environment release the pressure of modern people according to the degree of action of the physical motion law in the real world, theslight symptoms of insomnia, anxiety and depression are relieved, and serious psychological health problems are avoided; and a far-end expert carries out analysis and scheme improvement, so that a large amount of time is saved for the user.