14 results about "Screening duration" patented technology

This invention discloses a PCBA (Printed Circuit Board Assembly) product screening method based on reliability requirements, comprising: assessing the early failure rate of the PCBA product; generating a reliability target value for the product based on the early failure rate and preset conditions; establishing a functional relationship between the reliability target value and the early failure rate, the stress intensity used for screening, and the screening time; and determining the optimal screening stress intensity and screening time in conjunction with the preset conditions. This method helps PCBA manufacturers to accurately determine screening results and costs; ensures that PCBA products maintain a reliable level while controlling screening costs; and helps PCBA manufacturers accurately screen products with potential failures, thereby improving product reliability and optimizing production efficiency.

The application provides a kinase inhibitor leading compound, a virtual screening method thereof and application of the kinase inhibitor leading compound in preparation of branched-chain alpha-keto acid dehydrogenase kinase inhibitors and / or drugs for treating diseases mediated by branched-chain alpha-keto acid dehydrogenase kinase. The virtual screening method provided by the application combines various virtual screening platforms to screen a large-scale compound library, improves the true positive rate of screening results, reduces the number of compounds needing experimental screening, and saves screening time and cost. In addition, the compounds I-III screened out with good binding affinity to BCKDK can be used in researches on targeting BCKDK to treat major diseases such as obesity, insulin resistance, maple syrup urine disease, neurological dysfunction, liver cancer, colorectal cancer and tumor cachexia.

The invention discloses an intelligent grading screening method for predatory mites, relates to the technical field of large-scale production and quality control of biological control natural enemy insects, and provides a concentric ring grading screening field which comprises a release ring area, a migration ring area, an approaching ring area and a predatory area, and each ring area is provided with a ring area suction surface, a negative pressure cavity and a collection channel. A thin-layer cavity is defined by the transparent cover plate and the bearing surface, a pumping outlet is formed in the center of the thin-layer cavity and communicated with the low-flow pumping assembly, and an air supply channel is arranged in the circumferential direction to maintain airflow to point to the pumping outlet; the migration ring area is provided with a volatile clue ring belt, the approaching ring area is provided with a trace clue ring belt, and the predatory area is provided with a central predatory point and can be configured with a standardized fake prey carrier to form a predatory trigger signal; and the pretreated predatory mites are synchronously released to a release ring area and are moved and gathered in a screening time window, and when the time window arrives, the low-flow pumping and draining assembly is closed, and the negative pressure cavity is synchronously opened to suck and divide flow, so that a multi-grade predatory mite grading result is obtained.

This invention provides a method for screening highly specific nucleic acid aptamers and specific *Lactobacillus helveticus* aptamers, belonging to the field of nucleic acid aptamers. Specifically, the method for screening highly specific nucleic acid aptamers provided by this invention includes the following steps: S1: A second library is obtained after N rounds of forward screening of a first library; S2: A third library is obtained after M rounds of reverse screening of the second library; S3: The third library is obtained after X rounds of forward screening of the third library to obtain selected random single-stranded oligonucleotides, which are then subjected to PCR amplification, purification, cloning, and sequencing; S4: The sequences cloned and sequenced in step S3 are used for affinity and specificity assays to select sequences with high affinity and specificity, thereby obtaining highly specific nucleic acid aptamers. The aptamers provided by this invention have the advantages of high specificity and strong affinity, and the construction method of the aptamers provided by this invention has the advantage of short screening time.

The utility model discloses meal replacement powder raw material screening equipment capable of rapidly screening impurities, which belongs to the technical field of meal replacement powder raw material screening, and adopts the technical scheme that the meal replacement powder raw material screening equipment comprises a fixed seat, a vibration frame is arranged at the top of the fixed seat, and a cleaning mechanism, a screening frame and a sealing cover are arranged at the top of the vibration frame; an auxiliary mechanism is arranged at the top of the sealing cover; the cleaning mechanism comprises a fixing frame, a plurality of elastic balls, a plurality of moving grooves, a limiting plate and a fixing plate, the top of the fixing frame extends into the screening frame and is in close contact with the interior of the screening frame, and the surfaces of the elastic balls are in contact with the interiors of the moving grooves. The problems that the screening effect is affected due to the fact that the screening time is long, and the screening efficiency is reduced due to the fact that the surface of a screen is prone to being damaged by a cleaning brush when the screen is cleaned and the diameter of meshes of the screen may be increased are solved.

The embodiment of the invention provides a data fusion comparison method and system and a readable storage medium, and the method comprises the steps: firstly obtaining investment information data which belongs to the same investment information and comes from different data sources based on a preset data screening time range, guaranteeing the pertinence and comprehensiveness of data collection, and avoiding the irrelevant data interference; and then, target data is performed on the multiple groups of investment information data to focus core fusion data, multi-dimensional verification is completed in combination with a preset data comparison verification rule, and data with data errors and format deviation in the target fusion data is effectively discriminated and eliminated, so that the data quality of the fusion data is guaranteed. And finally, performing fusion processing on the data passing the verification according to a data fusion rule to form standardized data with a unified caliber, thereby solving the problems of tedious multi-source data summarization and difficulty in unified management. Meanwhile, the fused standardized data has both accuracy and practicability, and the management efficiency of the data is effectively improved.

This utility model relates to the field of raw material screening technology, specifically to a raw material grading, screening, and conveying device. The device includes a screening mechanism comprising a housing with an inlet at the top and a first outlet on one side. A first support member is mounted on the inner wall of the housing. A first spring is mounted on top of the first support member. A connecting member is mounted on top of the first spring. A screen is hinged to one end of the connecting member. A vibrating motor is mounted at the bottom of the screen. A first drive mechanism for rotating the screen is mounted below the screen. A second support member is slidably mounted on the rear wall of the housing. A second spring is mounted on top of the second support member. A third support member is mounted on top of the second spring. A first electric cylinder is mounted on one side of the second support member. A fourth support member is mounted at the first outlet. This device can perform screening in a horizontal state, extending the screening time and ensuring more thorough screening of the raw materials.

The invention relates to a fluorescent protein selection marker staygold-S13 gene as well as a construction method and application thereof, and belongs to the technical field of biological engineering. The invention provides a fluorescent protein selection marker staygod-S13 gene for screening an L-arginine production strain and a construction method of a gene fragment, compared with other similar gene selection markers, the selection marker provided by the invention has the advantages that the fluorescence intensity is positively correlated with the concentration of L-arginine; according to the screening marker, the screening efficiency of the L-arginine high-yield strain can be obviously improved, the screening time and cost can be saved, the screening efficiency can be improved, and the screening marker has a wide application prospect.

The invention discloses a fault injection test case screening method and device based on fault detectability analysis, and aims to solve the problems of blindness and low efficiency of existing screening. The method comprises the steps of firstly defining a fault injection range and generating a full-quantity fault set, extracting a dynamic behavior portrait of a test case through fault-free gate-level logic simulation, and identifying a static region register set; performing structure detectability analysis on the full-amount fault set under unconstrained and static region conversion structure constraints respectively; quantifying irreplaceability of the test case to fault detection through differential analysis, and fusing a multi-dimensional coverage rate index and time cost to obtain a sorting score; and finally, screening out an optimal test case subset through a greedy algorithm by using a combinatorial optimization model with budget constraint. According to the method, a large amount of fault injection simulation is not needed, the screening time is remarkably shortened, the fault coverage rate is improved, the computing resource overhead is reduced, and the method is suitable for functional security verification of a high-reliability chip.

The application relates to a particle screening method, device and equipment in cryo-EM imaging and a storage medium, wherein the method comprises the following steps: dividing a protein reconstruction final particle data set into a half data set based on a division strategy in cryo-EM three-dimensional reconstruction; performing three-dimensional reconstruction on all particles in each half data set respectively to obtain a first protein density map and a second protein density map, so as to screen all particles in the corresponding half data set and obtain particles meeting preset conditions; performing iteration on the three-dimensional reconstruction and particle screening until a preset iteration number is reached, and obtaining different round first protein density maps and second protein density maps and resolutions thereof, and then determining an optimal screening ratio of the final particle data set. Therefore, the problems that the existing particle screening technology is too dependent on screening criteria established by people, the screening time is relatively long, the screening algorithm accuracy is relatively low, and it is difficult to quickly and effectively screen a large number of low signal-to-noise ratio particles and the like are solved.

The intelligent sorting machine for fruit tree fruit sorting comprises a screening plate, the side wall of the screening plate is fixedly connected with a plurality of guide columns, an abutting groove is formed in each guide column, the side wall of each abutting groove is provided with a rotating groove and a mounting groove, the upper surface of each mounting groove is fixedly connected with a screening motor, and the upper surface of each screening motor is fixedly connected with a rotating shaft. And the output end of the screening motor is fixedly connected with a first rotating column, the first rotating column is located in the rotating groove, and the upper surface of the first rotating column is fixedly connected with a turning column. The angle of each guide column can be independently controlled, so that a plurality of fruits can be screened and transferred in parallel, and the overall screening time is greatly shortened. Compared with traditional equipment with a single screening channel, the multi-guide-column structure can remarkably improve the fruit screening number in unit time, rotation of the turning columns in the abutting grooves is a stable movement mode, and violent impact and collision on fruits can be avoided.

The invention discloses a rapid micro-plastic detection method and system based on a spectral analysis technology, and the method comprises the steps: achieving the efficient separation and concentration of a sample through the development of vacuum filtration and density gradient centrifugation means; meanwhile, an automatic sample treatment system is constructed, and automatic equipment integrating filtering, digestion and separation steps is adopted, so that the time consumed by manual operation is reduced; besides, based on a rapid screening technology of Nile red fluorescent staining, through specific fluorescence labeling of hydrophobic micro-plastics, the micro-plastics are rapidly positioned by using a fluorescence microscope, so that the manual screening time is shortened, and the detection efficiency is improved.

The utility model relates to the technical field of steel fiber reinforced castable production and screening, in particular to a steel fiber reinforced castable production and screening device which is provided with a screening mechanism and a rotating mechanism, so that in the steel fiber reinforced castable production and screening process, flying dust can be inhibited, the screening effect is improved, and the production efficiency is improved. The screening time is shortened, and the processing efficiency is improved; comprising a screening mechanism; the device further comprises a limiting mechanism, a supporting mechanism, a sealing mechanism and a rotating mechanism, the supporting mechanism is installed at the upper end of the limiting mechanism, the sealing mechanism is installed on the limiting mechanism, the screening mechanism is installed in the sealing mechanism, and the rotating mechanism is installed on the screening mechanism; the limiting mechanism is used for limiting, the supporting mechanism is used for supporting, the sealing mechanism is used for sealing, the screening mechanism is used for screening, and the rotating mechanism is used for rotating.

The present application relates to the technical field of data processing, in particular to an intelligent screening method, device and system for an intelligent personnel platform, the method comprising: collecting a plurality of reference resumes and extracting keywords, establishing a reference resume database; obtaining a job position and a corresponding delivery resume, matching the reference resume of the delivery resume with the reference resume database for the job position; counting the number of same keywords according to the delivery resume and the corresponding reference resume, respectively determining the compliance degree and the non-target degree of the work ability to the job position, obtaining the compliance of the delivery resume to the job position, and visualizing the display; based on the reference resume, analyzing the job position and the corresponding delivery resume, determining the compliance of the delivery resume to the job position, screening all the delivery resumes through the compliance, making the compliance judgment of the delivery resume more accurate, effectively reducing the screening time of the delivery resume by manual, retaining suitable delivery resumes, and preventing the omission of excellent talents.