2results about How to "Short opening hours" patented technology

The invention relates to the technical field of information system authority control and access management, and discloses a hierarchical authority adaptive access control method and device based on a student information system, and the method comprises the steps: analyzing a user access log, extracting a daily access record, carrying out the statistics of the number of times of access in each time period, and marking a high-frequency access interval; counting key peak intervals for the high-frequency access intervals to generate a time domain behavior set; comparing the role association data with the time domain behavior set, and determining a personalized behavior feature description set; extracting a time rule to generate a temporary permission rule list; according to the system resource occupation data, dynamically adjusting permission rules, and generating an optimized permission rule combination; sequencing according to a time rule to generate a permission allocation sequence; and updating the permission storage structure and automatically executing permission granting operation. According to the method, self-adaptive permission allocation based on the user behavior mode and the system load can be realized, and the system security and the resource utilization rate are improved.

The utility model discloses a kind of microbial culture tanks, it is related to microbial culture technical field.A kind of microbial culture tank, comprising: tank body and the feeding device located in one side of tank body;Feeding device includes: feeding hopper, side frame plate, limiting track, crossbeam, winch and directional wheel;Tank body top is provided with feeding bin, and feeding bin bottom is provided with feeding port;Side frame plate includes two, two side frame plates are fixed at the one side of tank body with interval, and feeding bin is located between two side frame plates;The rear side of each side frame plate is fixed with a limiting track, and limiting track includes the first track of vertical arrangement, and the second track of arc shape connected with the first track;The free end of second track is set to the direction of feeding bin direction.This utility model is designed by vertical plus arc-shaped limiting track, cooperates with double-side steel rope synchronous traction, realizes the stable lifting of feeding hopper and accurate steering butt joint feeding bin, without manual assistance, reduce material spilling and pollution.