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基于马尔可夫链的COVID-19流行病患病区域变化趋势预测

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陕西科技大学学报 2025年第1期43卷 211-218页

作者：王鑫王令戈师鹏柔陕西科技大学电子信息与人工智能学院陕西西安710021

在COVID-19疫情环境下,为精准预测不同症状状态的人群人数和区域级别的发展趋势,以SIR传染病模型为基础,基于马尔可夫链预测时空相关的特性,设计了感染人群状态与管控措施相关的K-SIRD传染病预测模型.根据COVID-19疫情人群之间传染性的... 详细信息

在COVID-19疫情环境下,为精准预测不同症状状态的人群人数和区域级别的发展趋势,以SIR传染病模型为基础,基于马尔可夫链预测时空相关的特性,设计了感染人群状态与管控措施相关的K-SIRD传染病预测模型.根据COVID-19疫情人群之间传染性的特征及受距离影响造成有效传染数R e的变化而导致不同的症状状态改变的转移规律,实时精准预测了不同状态的人员人数变化,并根据同一区域人群症状状态分布情况不同,针对不同级别的区域采用不同等级的管控措施.

关键词： K-SIRD模型 COVID-19 马尔可夫链有效繁殖数

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Microbial control of the carbon cycle in the ocean

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National Science Review 2018年第2期5卷 287-291页

作者： ling wang Science writer based in Beijing

The oceans cover 71%of the area of our planet and serve as a major repository for anthropogenic *** amount of dissolved organic carbon(DOC)in the ocean is comparable to the amount of CO2 in the *** all this DOC were to be respired,it would double the CO2 level in the atmosphere and result in catastrophic *** the past few decades,scientists have increasingly begun to understand the vital role that

关键词： CARBON cycle (Biogeochemistry) CARBON compounds OCEAN

Mission and challenges of higher education: an interview with G.Q. Max Lu, the president of the University of Surrey

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National Science Review 2020年第6期7卷 1108-1113页

作者： ling wang Zhengtang Guo the Institute of Geology and Geophysics Chinese Academy of Sciences

The University of Surrey (referred to as Surrey hereafter) is one of the renowned universities in the UK that was established on 9 September1966 with the grant of its Royal Charter and its roots go back to Battersea Polytechnic Institute, founded in 1891. Surrey is the research hub of small satellites, mobile telecommunication and artificial intelligence in Europe. In 2016, Surrey was named as ‘Univer-

关键词： Biographies

Drug discovery in China: challenges and opportunities

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National Science Review 2018年第5期5卷 768-773页

作者： ling wang Freelance science writer based in Beijing

Human history is also a chronicle of battling against diseases. Thanks to the rapid advancement of life science and biotechnologies such as gene editing and deep sequencing, recent decades have seen more and more untreatable illnesses on the verge of being conquered. However, an efficient drug-innovation system involves multiple driving forces—policy stimulation and commercial interests play important roles, besides advances in science and technology. Therefore, establishing the synergism among various driving forces is essential for new drug discovery and development. As the most populous country in the world, China has the largest population of a broad spectrum

关键词： In Drug discovery in China challenges and opportunities

Mu-ming Poo:China Brain Project and the future of Chinese neuroscience

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National Science Review 2017年第2期4卷 258-263页

作者： ling wang 机构不详

Among several major frontier science and technology projects soon to be initiated by the Chinese government,China Brain Project(on ‘Brain Science and Brain-like Intelligence Technology’ (CBP))has attracted much ***-... 详细信息

关键词： Mu-ming Poo:China Brain Project and the future of Chinese neuroscience Project

Decomposition-Based Multi-Objective Optimization for Energy-Aware Distributed Hybrid Flow Shop Scheduling with Multiprocessor Tasks

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Tsinghua Science and Technology 2021年第5期26卷 646-663页

作者： Enda Jiang ling wang Jingjing wang the Department of Automation Tsinghua UniversityBeijing 100084China

This paper addresses the Energy-Aware Distributed Hybrid Flow Shop Scheduling Problem with Multiprocessor Tasks(EADHFSPMT)by considering two objectives simultaneously,i.e.,makespan and total energy *** consists of three sub-problems,i.e.,job assignment between factories,job sequence in each factory,and machine allocation for each *** present a mixed inter linear programming model and propose a Novel MultiObjective Evolutionary Algorithm based on Decomposition(NMOEA/D).We specially design a decoding scheme according to the characteristics of the *** initialize a population with certain diversity,four different rules are ***,a cooperative search is designed to produce new solutions based on different types of relationship between any solution and its *** enhance the quality of solutions,two local intensification operators are implemented according to the problem *** addition,a dynamic adjustment strategy for weight vectors is designed to balance the diversity and convergence,which can adaptively modify weight vectors according to the distribution of the non-dominated *** computational experiments are carried out by using a number of benchmark instances,which demonstrate the effectiveness of the above special *** statistical comparisons to the existing algorithms also verify the superior performances of the NMOEA/D.

关键词： distributed hybrid flow shop multiprocessor tasks energy-aware scheduling multi-objective optimization decomposition dynamic adjustment strategy

A Memetic Algorithm With Competition for the Capacitated Green Vehicle Routing Problem

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IEEE/CAA Journal of Automatica Sinica 2019年第2期6卷 516-526页

作者： ling wang Jiawen Lu the Department of Automation Tsinghua University

In this paper, a memetic algorithm with competition(MAC) is proposed to solve the capacitated green vehicle routing problem(CGVRP). Firstly, the permutation array called traveling salesman problem(TSP) route is used to encode the solution, and an effective decoding method to construct the CGVRP route is presented accordingly. Secondly, the k-nearest neighbor(k NN) based initialization is presented to take use of the location information of the customers. Thirdly, according to the characteristics of the CGVRP, the search operators in the variable neighborhood search(VNS) framework and the simulated annealing(SA) strategy are executed on the TSP route for all solutions. Moreover, the customer adjustment operator and the alternative fuel station(AFS) adjustment operator on the CGVRP route are executed for the elite solutions after competition. In addition, the crossover operator is employed to share information among different solutions. The effect of parameter setting is investigated using the Taguchi method of design-ofexperiment to suggest suitable values. Via numerical tests, it demonstrates the effectiveness of both the competitive search and the decoding method. Moreover, extensive comparative results show that the proposed algorithm is more effective and efficient than the existing methods in solving the CGVRP.

关键词： Capacitated green vehicle routing problem(CGVRP) competition k-nearest neighbor(kNN) local intensification memetic algorithm

Experimental investigation on single person's jumping load model

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Earthquake Engineering and Engineering Vibration 2015年第4期14卷 703-714页

作者： Chen Jun wang Haoqi wang ling State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Tongji Architecture Design (Group) Co.Ltd.

This paper presents a modified half-sine-squared load model of the jumping impulses for a single person. The model is based on a database of 22,921 experimentally measured single jumping load cycles from 100 test subjects. Threedimensional motion capture technology in conjunction with force plates was employed in the experiment to record jumping loads. The variation range and probability distribution of the controlling parameters for the load model such as the impact factor, jumping frequency and contact ratio, are discussed using the experimental data. Correlation relationships between the three parameters are investigated. The contact ratio and jumping frequency are identified as independent model parameters, and an empirical frequency-dependent function is derived for the impact factor. The feasibility of the proposed load model is established by comparing the simulated load curves with measured ones, and by comparing the acceleration responses of a single-degree-of-freedom system to the simulated and measured jumping loads. The results show that a realistic individual jumping load can be generated by the proposed method. This can then be used to assess the dynamic response of assembly structures.

关键词： jumping loads three dimensional motion capture technology half-sine-squared model contact ratio impact factor

DFT Study on Two C_4N_(12)O_4 Isomers with Pagodane- and Isopagodane-like Structures

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1264-1270页

作者： LIU Feng-ling wang Jin-Shan PENG ling Department of Chemistry Shandong Normal University Jinan 250014 China

Geometries, energies, and vibrational frequencies for two C4N12O4 isomers with pagodane- and isopagodane-like structures have been calculated at the B3LYP/6-31G＊ *** 1 and 2 are of D2h and D2d symmetry, respectively. Heats of formation for the two C4N12O4 isomers have been estimated in this paper, indicating they would be reasonable candidates for high energy density materials.

关键词： two C4N12O4 isomers with pagodane-like structures high energy density material,B3LYP/6-31G* vibrational frequency heat of formation