45results about How to "Determine stability" patented technology

The aim of the invention is to provide a nerve guide that allows the axons to develop fairly freely during regeneration. For this purpose, the nerve guide is produced based on a shaped body from a cross-linked, resorbable, gelatin-based material. The shaped body is a tubular hollow body having a wall with an exterior surface and an interior surface, which wall defines a lumen. The nerve guide comprises a semipermeable layer surrounding the lumen.

The invention discloses a low-power-consumption battery capacity detection method, comprising the following steps: S10, detecting and updating battery capacity when sleep is wakened up; and S20, detecting and updating the battery capacity in a running state. The battery capacity is detected by adopting different detection methods when the sleep is waken up and when in the running state, and the adopted methods are a single-point average acquisition algorithm and a multipoint average acquisition algorithm combination respectively, so that test stability and reality of an acquired value are guaranteed. The former method acquires an initial value at a stable point when the sleep is wakened up, and the latter method acquires at multiple points in the running state. The method disclosed by theinvention adaptively detects capacities of two power supplies with different power supply features, namely a battery and a voltage-stabilized power supply, also supports a battery which can replace different capacities, supports low-power-consumption design and does not need to be run all the time.

A robot gripper is provided comprising two robot arms, upper contact parts, and lower contact parts disposed at the ends of each of the two robot arms. The upper and lower contact parts are in contact with a top and a bottom of an article when gripping the article, The upper and lower contact parts are semispherical shaped and have predetermined radii. Sensor units are mounted on the upper contact parts and the lower contact parts. The sensor units measure vertical or horizontal forces applied to the upper contact parts or the lower contact parts when gripping the article. A control unit configured to determine whether the center of gravity of the article is located at a center position between the ends of the arms using vertical and horizontal distances between the ends of the arms and vertical components of the forces measured by the sensor units when gripping the article is provided.

The invention discloses a preliminary epidemic screening and safety monitoring and controlling cabin in public places. The preliminary epidemic screening and safety monitoring and controlling cabin comprises a cuboid bio-safety detection cabin, a negative pressure isolation cabin and a public safety detection cabin, a first cabin inlet door and a first cabin outlet door are correspondingly arranged on the left side and the right side of the bio-safety detection cabin, the rear side of the negative pressure isolation cabin is in butt-joint with and communicates with the position, close to the first cabin outlet cabin, of the front side of the bio-safety detection cabin through a first side cabin door; a second cabin inlet door and a second cabin outlet door are correspondingly arranged on the left side and the right side of the public safety detection cabin, and the second cabin inlet door is in butt-joint with and communicates with the first cabin outlet door. According to the preliminary epidemic screening and safety monitoring and controlling cabin, the principle is scientific, the design is novel, the structure is simple and compact, strict detection can be achieved, whether a man is a wanted criminal at large or not can be identified, the travel safety of people in public places is ensured, very important social value and economic value are achieved, and very important political significance is also achieved.

The invention discloses a stability calculation method of an incidence angle controller. The stability calculation method comprises the following steps of S1, calculating the longitudinal equation of an offset incidence angle state under a certain flight state of a plane; S2, selecting the flight state of the plane in the step S1 and calculating the longitudinal equation of a maximum incidence angle state; S3, calculating the stability reserve of a control augmentation stability system when the incidence angle in the step S1 is alpha L; S4, calculating the stability reserve of the incidence angle controller when the incidence angle in the step S1 is alpha L; S5, calculating the stability reserve of the control augmentation stability system when the incidence angle in the step S2 is alpha max; S6, calculating the stability reserve of the incidence angle controller when the incidence angle in the step S2 is alpha max; S7, taking the minimum value of a magnitude margin as the magnitude margin of the incidence angle controller, and taking the minimum value of a phase margin as the phase margin of the incidence angle controller; and S8, determining the stability reserve of the incidence angle controller within an entire flight envelope. According to the method, a traditional qualitative evaluation method for the stability of the incidence angle controller is converted into the qualitative evaluation method, and the specific numeric values of the magnitude margin and the phase margin of a flight control system are obtained.

The invention discloses a method for detecting the fastening-down temperature of a long seamless rail. The method is characterized by utilizing a metal magnetic memory(MMM)-magnetic Barkhausen noise(MBN) fused online detection method, and comprises steps of: establishing a system platform; rapidly detecting the long rail by using a MMM method, recording a temperature stress distribution map of the rail, and locating a temperature stress concentration area; quantitatively detecting the temperature stress of the temperature stress concentration area point by point by using a MBN method to determine a stress change; and determining the fastening-down temperature of the seamless rail according to the designed load capacity of the seamless rail. The method may quickly and quantitatively detect the internal temperature stress of the long seamless rail, establishes a computational formula for the actual fastening-down temperature of the seamless rail according to rail parameters and field rail temperature, and achieves online, lossless, and quick detection of the actual fastening-down temperature of the seamless rail.

The invention relates to an unsaturated tailings dam stability analysis method and system and belongs to the field of tailings dam analysis. The method comprises the steps as follows: S1, acquiring MS (matric suction) of a tailings dam in different unsaturated states; S2, acquiring tailings dam shear strength tau f corresponding to the MS of the tailings dam in the different unsaturated states; S3, analyzing the acquired MS of the tailings dam in the different unsaturated states and the corresponding shear strength tau f by use of a grid Boltzmann model to determine the stability of the unsaturated tailings dam. The MS of the tailings dam in the different unsaturated states and the corresponding shear strength are acquired, the acquired MS of the tailings dam in the different unsaturated states and the corresponding shear strength are analyzed with the grid Boltzmann model, and thus, the stability of the unsaturated tailings dam is determined through the MS of the tailings dam.

The invention discloses a transmission shell three-dimensional reconstruction device and method based on binocular stereoscopic vision. The device comprises two cameras, a rotary table and two liftingtables. The rotary table is horizontally arranged, and the rotary table can rotate around a vertical center line. The two lifting tables are symmetrically mounted on the rotary table. Each lifting platform is provided with a turnover clamping device. Each turnover clamping device comprises a clamping hydraulic cylinder, a motor bracket, a motor and a paw. The two turnover clamping devices can clamp a transmission shell, and the camera lens faces the position between the two claws. The invention is simple in structure and convenient to operate. The two cameras are fixed to the special supportin the structural form of the intersecting optical axis for shooting, efficient non-contact measurement is completed, the problem that secondary errors occur in contact measurement is effectively solved, and the detection efficiency is improved.

The invention provides a discrimination method of the stability potential energy of an overburden strata in metal mine supported by artificial pillars. A goaf overburden strata model is established, when the width of a goaf is larger than the length, the model is simplified to a thin section simply supported beam model, and stress distributions generated by the support force and tectonic stress ofa beam are calculated respectively; when the strata only supported by the beam, a plane-coordinate system is built, the stress function on a plane is calculated, and components of stress are obtained; when the strata is only subjected to the tectonic stress, the components of stress are calculated; when the strata is subjected to the combined action of the supporting force and the tectonic stress, the generated total stress distribution is calculated when the strata is subjected to the combined action of the supporting force and the tectonic stress, the potential energy of the whole strata is calculated, and the stability potential energy of the overburden strata in metal mine supported by artificial pillars is discriminated. The method can be used for analyzing the stress distribution and concentration degree, changing by the artificial pillars, of the goaf overburden strata, and meanwhile the stability of the goaf overburden strata is judged under supporting of the artificial pillars.

he invention discloses a method for determining an LPV variable gain controller, comprising steps of obtaining a standard form of a controller solving problem of a linear system of an LPV system having undetermined parameters through model conversion according to a system modeling error and a LPV parameter online measurement deviation and converting the controller-solving problem of the linear system to a convex optimization problem of an linear positive matrix unequal formula, wherein when the linear positive matrix can be solved , the LPV controller exists and is stable, The method for determining stability of LPV controller can determine the stability of the LPV controller and obtains the sufficient conditions for the controller to exist.

The invention provides a data clustering method and device in order to solve the technical problem of poor clustering effect caused by influence of initial conditions in an existing question set clustering process. The data clustering method comprises steps as follows: to-be-processed data is acquired and comprises testing data and non-testing data; the testing data is subjected to first classification processing, and a first classification result is obtained; the testing data is subjected to second classification processing by adopting an initial preset value, and a second classification result is obtained; the second classification result and the first classification result are compared, and when the accuracy rate of the second classification result obtained by utilizing the first classification result as the standard is larger than or equal to a threshold value, the initial preset value is set as a target preset value; when the accuracy rate is smaller than the threshold value, the initial preset value is adjusted constantly until the accuracy rate of a new second classification result obtained when the initial preset value is adjusted to be the target preset value is larger than or equal to the threshold value; the non-testing data is subjected to the second classification processing by adopting the target preset value.

A method and apparatus for determining a stability of plasma in a plasma processing apparatus for performing a plasma processing by converting into plasma a processing gas supplied into a processing container. The method includes: detecting a light emission intensity of the plasma in the processing container while the plasma is generated in the processing container; generating a first function representing a relationship between time and the light emission intensity from a detection result of the light emission intensity; differentiating the first function with time to calculate a differential value, and generating a second function from a relationship between an absolute value of the differential value and time; and integrating the second function with time to calculate an integral value, and determining a stability of the plasma based on the calculated integral value. A related apparatus is also provided.

The embodiment of the invention discloses a station arrival volume prediction method and device, electronic equipment and a computer readable medium. A specific embodiment of the method comprises the following steps: acquiring a goods quantity information set of a target sorting center in a preset historical time period; on the basis of each site, according to each historical goods quantity of the corresponding site included in the goods quantity information set, generating each historical goods quantity ratio as a historical goods quantity ratio group, and obtaining a historical goods quantity ratio group set; based on the historical goods quantity proportion group set and each station, determining whether the historical goods quantity proportion of the station is stable or not; in response to determining that the historical cargo volume ratio of the target site is stable, generating a target cargo volume ratio according to the historical cargo volume set and each historical cargo volume corresponding to the target site; and according to the target cargo volume ratio and the predicted total cargo volume of the target sorting center, generating the station arrival cargo volume. According to the embodiment, the cargo volume ratio stability of each station of the sorting center can be automatically and quickly determined, and the accuracy of the predicted arrival cargo volume of the station is improved.

A metal ore overlying rock three-dimensional space stress calculation method under artificial pillar support comprises the steps: establishing a goaf overburden rock space stress model and a space goaf stress model, and establishing a space coordinate system; Calculating and solving each stress component of the overlying strata when the overlying strata only has the gravity and the supporting force effect of the beam: when only the structural stress effect exists, the internal equation of the system is the same as the supporting force effect of the beam, and the boundary condition is changed,then solving each stress component of the overlying strata; When an artificial pillar is adopted for supporting, all stress components of the overlying strata are calculated and solved; And when the rock mass bears the combined action of the supporting force and the structural stress, each stress component is calculated, and finally the potential energy of the whole rock mass is obtained. According to the method, the stress distribution and concentration degree of the overlying strata in the goaf can be changed through manual mining column support, and the stress of the metal ore overlying strata in the three-dimensional space under the manual mining column support can be obtained through calculation.

The invention relates to a new energy automobile battery system burning test device. The device comprises an oil tray placing and transferring device and a gear stopping mechanism. An oil tray and a covering mechanism are placed on the oil tray placing and transferring device; the covering mechanism is located on a left side of the oil tray; the oil tray is a box body with an opening in a top; anda lifting type testing support installed above the middle of the oil tray placing and transferring device is also included, and supporting legs of the lifting type testing support are fixed to the oil tray placing and transferring device. The device has the following beneficial effects that after a battery pack or the system is simulated to be installed on an electric vehicle, when the electric vehicle passes through high-temperature ground or flame ground, and a surface temperature of the battery pack or the system rises suddenly, various conditions which may occur due to a sudden temperature rise of the battery pack or the system in a short time are observed. Through an electric vehicle power battery burning test, use stability of the battery module can be determined, and support is provided for use of a new energy vehicle power battery system.

The invention provides a performance testing method and device for a vacuum pump. The performance testing method for the vacuum pump comprises the following steps that a trigger signal for performingperformance testing on the vacuum pump is acquired; vacuumizing testing is conducted on the vacuum pump according to the trigger signal and preset vacuumizing time; a first data packet and a second data packet are received, the first data packet comprises a plurality of test vacuum degrees of a first vacuum sensor recorded every preset duration, and the second data packet comprises a plurality ofreal-time vacuum degrees of a second vacuum sensor recorded every preset duration; and the performance condition of the vacuum pump is determined according to the first data packet and the second datapacket. According to the scheme, the first data packet and the second data packet are automatically received after the trigger signal is obtained, the performance condition of the vacuum pump is determined according to the first data packet and the second data packet, the intelligent degree of the whole testing process is high, the process is effectively simplified, and the testing efficiency isimproved.

The invention provides a method and a device for determining the stability of an alternating current and direct current system in a direct current hierarchical access mode. The method comprises the following steps of: determining all n drop points accessed into an alternating current commutation bus in a direct current mode in the alternating current and direct current system; based on the Thevenin's equivalence method, establishing an equivalent node impedance matrix Zeq of the alternating current and direct current system, and determining each feature value [lambda]I of the equivalent node impedance matrix Zeq, wherein 1<=i<=n; and according to the minimum value in the reciprocal values of the absolute values of the feature values [lambda]I, determining the stability of the alternating current and direct current system. The method can rapidly and accurately determine the stability of the multi-direct current feed alternating current and direct current system in the direct current hierarchical access mode.

Embodiments of the invention provide a database detection method and apparatus. The method comprises the steps of obtaining metadata of a to-be-detected database and a corresponding target detection rule; the target detection rule comprises a detection rule used for detecting an object definition statement and a detection rule used for detecting a structured query language statement; based on metadata of the to-be-detected database, obtaining a to-be-detected statement which aims at the to-be-detected database and corresponds to the target detection rule; for each to-be-detected statement, determining a detection result corresponding to a detection condition matched with the to-be-detected statement in the corresponding target detection rule, and obtaining a detection result of the to-be-detected statement; and obtaining a final detection result of the to-be-detected database based on the respective detection result of each to-be-detected statement. On the basis, the database of the application system can be detected. And subsequently, based on the final detection result of the to-be-detected database, determining the stability of the to-be-detected database.

The invention relates to the technical field of screen detection, and in particular to a screen detecting device. The device includes a support platform, a support base disposed on the support platform, a carrying seat disposed on the support base, an illumination mechanism, a probe assemblyand an information collection mechanism; the illuminating mechanism is located under the carrying seat, andthe illuminating mechanism is disposed on the support platform; the probe assembly is located above the carrying seat, the probe assembly is movable up and down, the probe assembly comprises a cantilever probe carrier plate and cantilever probes, and each cantilever probe is disposed at the cantilever probe carrier plate; the information collection mechanism is located above the carrying seat, andthe information collection mechanism can collect information on a screen. The cantilever probes on the cantilever probe carrier plate are in contact with the screen on the carrying seat, and abuts ona detection point on the screen, the two cantilever probes are turned on, the illumination mechanism emits laser light on the screen,the information collection mechanism collects light passing through the screen, and image information is analyzed to determine the uniformity and stability of screen imaging.

The invention discloses a method for obtaining nilaparvata lugens new strains stably infected with Cardinium by artificial transfection and belongs to the technical field of agricultural biology. According to the method, eggs newly laid by sogatella furcifera and nilaparvata lugens are used as a donor and a receptor for artificial transfection respectively, and a cytoplasm component of the donor is sucked by a micro-injection instrument and rapidly injected into receptor eggs. The receptor eggs are cultured and developed into primary female adults (G0), the primary female adults are mated with non-infected males to produce a first generation (G1), and infected positive females are screened from the G1 to be continuously mated with non-infected males to produce a second generation (G2). The G2 and the G1 are detected to be positive, so that the nilaparvata lugens new strains stably infected with Cardinium are obtained successfully. The method can be used for rapidly establishing the nilaparvata lugens new strains infected with Cardinium, the fertility and hatching rate of the new strains are significantly reduced, so that harm of the nilaparvata lugens is controlled. The invention also provides models for transfection of other symbiotic bacteria.

The embodiment of the invention provides a detection circuit and a detection method. The detection circuit comprises a detected module and a detection module; the detected module is provided with an overturning state output end and a data output end; the detected module is connected with the detection module through the overturning state output end, and the detected module is further connected with a preset data processing device through the data output end; and the tested module is used for generating particle overturning state data and operation result data. According to the embodiment of the invention, whether the tested module has a storage error or not can be judged according to the matching condition of the particle overturning state data and the preset overturning reference data; and whether the tested module has a sampling error or not is judged according to the matching condition of the operation result data and preset logic reference data on the basis of judging whether the tested module has a storage error or not. Therefore, whether the data stored in the tested module have errors or not and the error type of the data are detected, and then the stability of the tested module under particle beam radiation is determined.

Embodiments of the present invention provide a detection circuit and a detection method. The detection circuit includes: a tested module and a detection module; the tested module has an inversion state output end and a data output end, and the tested module is connected to the detection module through the inversion state output end , the detected module is also connected with the preset data processing device through the data output terminal; the detected module is used to generate particle inversion state data and operation result data. In the embodiment of the present invention, it is possible to judge whether a storage error occurs in the tested module according to the matching situation between the particle flip state data and the preset flip reference data; Logical reference data matching to determine whether the module under test has a sampling error. In this way, it is possible to detect whether the data stored by the tested module has an error, and the error type of the data, so as to determine the stability of the tested module when it is irradiated by the particle beam.

The invention relates to the technical field of building construction, in particular to a three-dimensional calculation and analysis method for influence of buttresses on an interval tunnel and a station structure. The method comprises the following steps: synchronously implementing a co-construction part of an underpass, an overpass bridge and a station and the station, installing beam pieces, and arranging the buttresses below the beam pieces for fixing; enabling the buttresses to be aligned with station columns within the range of the station, and detecting the maximum stress of a tunnel vault and an upper-layer bottom plate and comparing the maximum stress with the maximum load of the station. The invention discloses a three-dimensional calculation and analysis method for influence ofbuttresses on an interval tunnel and a station structure. The maximum stress of the vault and the upper-layer bottom plate of the tunnel is detected through the alignment of buttresses and station columns within the station range and compared with the maximum load of the station, then whether the stress borne by the vault and the upper-layer bottom plate is within the maximum load of the station or not is determined, and the stability of the tunnel structure is determined.

A method and apparatus for determining a stability of plasma in a plasma processing apparatus for performing a plasma processing by converting into plasma a processing gas supplied into a processing container. The method includes: detecting a light emission intensity of the plasma in the processing container while the plasma is generated in the processing container; generating a first function representing a relationship between time and the light emission intensity from a detection result of the light emission intensity; differentiating the first function with time to calculate a differential value, and generating a second function from a relationship between an absolute value of the differential value and time; and integrating the second function with time to calculate an integral value, and determining a stability of the plasma based on the calculated integral value. A related apparatus is also provided.

The invention relates to a measuring component and a measuring method for the hardenability of steel with medium and low hardenability, and belongs to the technical field of hardenability testing of metal materials. In the present invention, the hardenability measurement component of low hardenability steel includes a base, a bracket, a liquid inlet pipe, a liquid inlet valve, a liquid storage tank, a test sample, a quenching liquid, a liquid discharge pipe, a liquid discharge valve, and the liquid storage tank is fixedly arranged. On the base, the top side end of the liquid storage tank is provided with a liquid inlet pipe communicating with the cavity of the liquid storage tank, the quenching liquid is arranged in the liquid storage tank, and the bottom end of the liquid storage tank is provided with a pipe connected with the cavity of the liquid storage tank. The liquid discharge pipe is provided with a liquid discharge valve, and the support is fixed horizontally on the inner wall of the lower part of the liquid storage tank; the test sample is arranged on the support; the test sample is a unequal diameter cone structure. The present invention solves the technical problem of a large amount of samples by setting the test sample as an unequal-diameter cone structure, and conducts the same experiment in the same hardenability measuring device for medium and low hardenability steel to ensure that the sample The quenching conditions are the same.

The invention discloses a method for detecting the fastening-down temperature of a long seamless rail. The method is characterized by utilizing a metal magnetic memory(MMM)-magnetic Barkhausen noise(MBN) fused online detection method, and comprises steps of: establishing a system platform; rapidly detecting the long rail by using a MMM method, recording a temperature stress distribution map of the rail, and locating a temperature stress concentration area; quantitatively detecting the temperature stress of the temperature stress concentration area point by point by using a MBN method to determine a stress change; and determining the fastening-down temperature of the seamless rail according to the designed load capacity of the seamless rail. The method may quickly and quantitatively detect the internal temperature stress of the long seamless rail, establishes a computational formula for the actual fastening-down temperature of the seamless rail according to rail parameters and field rail temperature, and achieves online, lossless, and quick detection of the actual fastening-down temperature of the seamless rail.

The invention provides a robot gripper, which comprises two robot arms, an upper contact part and a lower contact part arranged at respective ends of the two robot arms. When grasping an object, the upper and lower contact portions are in contact with the top and bottom of the object. The upper and lower contact portions are hemispherical with a predetermined radius. The sensor unit is mounted on the upper contact part and the lower contact part. When grasping an object, the sensor unit measures a vertical force or a horizontal force applied to the upper contact portion or the lower contact portion. There is provided a control unit configured to determine whether the center of gravity of the object is at a center position between the arm ends using the vertical and horizontal distances between the arm ends and the vertical component force measured by the sensor unit when the object is grasped.

The invention discloses an infrared-visible dual-band photoelectric detection system and a method for measuring the deflection angle of the optical axis. The photoelectric detection system includes a reflection system, a beam splitter, a visible light imaging unit located on the reflection light path of the beam splitter, and a mid-wave infrared light imaging unit in the transmission light path unit, and the optical axis deflection angle measurement unit, the optical axis deflection angle measurement method includes: 1. Initialize the CCD sensor and obtain the background grayscale image; 2. Mid-wave infrared optical axis alignment; 3. Visible light spot imaging; 4. Visible light Acquisition of light spot images; 5. Acquisition of centroid coordinates of visible light spot images; 6. Calculation of optical axis declination. The invention combines the advantages of the visible light band optical system and the mid-wave infrared band optical system, improves the efficiency of observation and detection, realizes long-distance, high-resolution and all-weather imaging, and effectively improves the imaging quality, and the optical axis deflection angle measurement unit can measure visible light The deflection angle between the optical axis and the mid-wave infrared optical axis measures the stability of the entire photodetection system.