Chinanews.com, Hangzhou, May 8 (Tong Xiaoyu, Cheng Zhenwei, Wang Shuhai) Students can use their mobile phones to view the real-time remaining seats in the cafeteria and the dishes in each window; put QR codes on the seats and feedback the number of people in the cafeteria at any time; based on the historical order data, create dishes Recommendation system ... During the outbreak, Hangzhou University of Electronic Science and Technology used big data modeling to launch "contactless catering."
On April 29th, Hangdian students began to return to school. After returning to school, the "contactless dining" of more than 20,000 teachers and students became the top priority of the school's logistics and catering management department.
Hangdian canteen, disinfect with disposable hand sanitizer before eating. Provided by the school
"According to the requirements of the Ministry of Education's" 1.5-meter dining interval ", this means that the number of seats in the 7 restaurants in the Xiasha headquarters will be reduced by half. The total number of students is still so much. How to solve the dining problem has really caused us a lot of headaches." Hangdian Lin Hao, principal of Wenyi Education Development Co., Ltd. said.
In view of Hangdian's repeated success in the mathematical modeling contest, Lin Hao found a member of the mathematical modeling "Dream Team Mentor Group" and Chen Yong, an associate professor of the School of Science, who proposed big data modeling to answer the need for "contactless catering."
The team of Chen Yong established a mathematical model based on the queuing theory of operations research. Based on the parameters such as the time of swiping each person in the historical data and the efficiency of the window service, the school meal was simulated and calculated.
Students can check the remaining seats in the cafeteria on their mobile phones. Provided by the school
The simulation results show that: the current restaurant seats only satisfy about 9,000 people, the average queue time is about 3.6 minutes, and the longest queue time is about 8.9 minutes. During the epidemic prevention and control period, a total of 14,000 teachers and students in the school work day should theoretically eat, that is, about 5,000 people have to arrange meals.
In order to solve the increment problem of about 5000 people, the mathematical model is calculated by simulation, and 17 temporary special windows need to be added to take away the meal and realize the "diversion of cafeteria personnel". At the same time, after the resumption of school, the school implemented delayed peak feeding, increasing the length of the restaurant's supply.
Under the guidance of big data simulation, Hangdian Canteen proposed the following "non-contact dining" optimization plan:
Students can view the real-time remaining seats of each canteen and the dishes provided by each window through their mobile phones, which is beneficial to divert and optimize the number of people who eat, and reduce the queue time. ; According to the student's historical dining and ordering data, analyze each student's preferences and tastes, establish a dish recommendation system, and save meal selection and dining time; establish a mathematical model to accurately calculate the optimal number of canteen windows at different periods, which provides students with timely The dishes can also save the operating cost of the canteen. (Finish)