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数据驱动的未知线性离散系统双模模型预测控制

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控制与决策 2025年第3期40卷 813-821页

作者：刘鑫严爱军北京工业大学信息科学技术学院数字社区教育部工程研究中心城市轨道交通北京实验室

针对模型参数未知的线性离散系统,提出一种数据驱动的双模模型预测控制方法,无需预先对系统进行建模,能够实现在约束条件下对目标设定点的最优跟踪控制.首先,根据有限的系统历史运行数据预测系统未来一段时间的运行轨迹,并在代价函数中... 详细信息

针对模型参数未知的线性离散系统,提出一种数据驱动的双模模型预测控制方法,无需预先对系统进行建模,能够实现在约束条件下对目标设定点的最优跟踪控制.首先,根据有限的系统历史运行数据预测系统未来一段时间的运行轨迹,并在代价函数中加入实时优化的人工平衡点,通过在线求解滚动优化问题来获得控制输入,进而平稳地驱动系统进入一个控制不变集内;然后,在控制不变集内,基于系统历史运行数据,采用策略迭代的方法求解动态反馈控制器,同时可得到静态前馈控制器,实现驱动系统收敛至平衡点的局部最优跟踪控制;最后,验证所提出方法的稳定性,并将其应用于一个线性化的四容水箱系统.实验结果表明,所提出方法有效可行,具有更小的超调量和更好的收敛性能.

关键词：模型预测控制线性离散系统约束系统数据驱动最优控制稳定性分析

Clinical characteristics of patients with hepatitis and cirrhosis and the construction of a prediction model

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World Journal of Hepatology 2025年第2期17卷 54-64页

作者： Yu-Shuang Huang Wei Gao ai-jun Sun Chun-Wen Pu Shuang-Shuang Xu Department of Infectious Diseases Dalian Public Health Clinical CenterDalian 116031Liaoning ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Dalian Medical UniversityDalian 116011Liaoning ProvinceChina Dalian Public Health Clinical Center Dalian Municipal Research Institute for Public HealthDalian 116031Liaoning ProvinceChina

BACKGROUND Hepatitis B-associated cirrhosis is an important disease burden in ***,there is a lack of effective predictors in clinical practice to drive delivery and enable early treatment to delay disease *** To analyzing the clinical characteristics of patients with hepatitis and cirrhosis,the nomogram model was established and *** The clinical data of 1070 patients with hepatitis B who were treated in our hospital from October 2015 to July 2022 were *** a 7:3 ratio,749 cases were divided into training cohorts and 321 cases were divided into validation *** addition,the training cohort and validation cohort were further divided into hepatitis group and hepatitis B-related cirrhosis group based on whether the patient progressed to *** logistic regression was used to analyze the influencing factors of hepatitis progression to cirrhosis.A roadmap prediction model was established,and the predictive effect of the model was evaluated by patientsubject receiver operating characteristic curve(ROC),and the effectiveness of the model was evaluated by decision curve *** Binary logistic regression analysis was performed using hepatitis B-related cirrhosis=1 and hepatitis=0 as dependent variables,and univariate analysis of serological indicators was used as *** results showed that glutamic oxaloacetate aminotransferase/glutamate acetone aminotransferase levels,prothrombin time activity,and hepatitis B e antigen levels were all contributing factors to the progression of hepatitis to *** area under the ROC curve was 0.693[95%confidence interval(CI):0.631 to 0.756]for the training cohort and 0.675(95%CI:0.561 to 0.790)for the validation *** addition,the decision analysis curves of the prediction models of both the training cohort and the validation cohort confirmed the effectiveness of the nomogram prediction *** Three independent factors influencing the progression

关键词： Hepatitis Hepatitis B-related cirrhosis Clinical features Influencing factors Nomogram

Automatic software fault localization based on artificial bee colony

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Journal of Systems Engineering and Electronics 2015年第6期26卷 1325-1332页

作者： Linzhi Huang jun ai School of Reliability and Systems Engineering Beihang University

Software debugging accounts for a vast majority of the financial and time costs in software developing and maintenance. Thus, approaches of software fault localization that can help automate the debugging process have become a hot topic in the field of software engineering. Given the great demand for software fault localization, an approach based on the artificial bee colony （ABC） algorithm is proposed to be integrated with other related techniques. In this process, the source program is initially instrumented after analyzing the dependence information. The test case sets are then compiled and run on the instrumented program, and execution results are input to the ABC algorithm. The algorithm can determine the largest fitness value and best food source by calculating the average fitness of the employed bees in the iteralive process. The program unit with the highest suspicion score corresponding to the best test case set is regarded as the final fault localization. Experiments are conducted with the TCAS program in the Siemens suite. Results demonstrate that the proposed fault localization method is effective and efficient. The ABC algorithm can efficiently avoid the local optimum, and ensure the validity of the fault location to a larger extent.

关键词： software debugging software fault localization arti-ficial bee colony (ABC) algorithm program instrumentation.

生成式人工智能赋能高中生物学备课的创新功能

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生物学教学 2025年第1期50卷 52-54页

作者：张军爱李高峰刘海军伊犁师范大学资源与环境学院伊宁835000 陕西师范大学生命科学学院西安710119

从备课模式、备课资源以及备课过程三个方面分析了生成式人工智能赋能高中生物学备课的创新功能,并探讨了生成式人工智能应用于高中生物学备课的不足之处,以期为教师利用人工智能进行创新性备课提供一定的参考。

关键词：生成式人工智能备课高中生物学

主轴变速下杂质颗粒对水润滑赛龙船艉轴承热弹流润滑性能影响分析

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船舶力学 2025年第1期29卷 73-84页

作者：李湧博向艾军张智徐波何佳宋琦王优强赵涛徐莹中国长江电力股份有限公司湖北宜昌443000 湖北省智慧水电技术创新中心武汉430010 青岛理工大学机械与汽车工程学院山东青岛266520 青岛理工大学工业流体节能与污染控制教育部重点实验室山东青岛266520

水润滑轴承的润滑剂中混入泥沙杂质颗粒会使轴承的工作环境变得恶劣,降低轴承的润滑性能。为研究水润滑轴承在水中含杂质颗粒条件下的弹流润滑性能,采用多重网格法分析不同主轴变速形式、不同杂质颗粒尺寸和形状对水膜最大压力和最小膜... 详细信息

水润滑轴承的润滑剂中混入泥沙杂质颗粒会使轴承的工作环境变得恶劣,降低轴承的润滑性能。为研究水润滑轴承在水中含杂质颗粒条件下的弹流润滑性能,采用多重网格法分析不同主轴变速形式、不同杂质颗粒尺寸和形状对水膜最大压力和最小膜厚的影响,并与纯水润滑条件进行对比。结果表明:主轴三种变速形式中,正弦加速和余弦减速对轴承的润滑性能最有利;杂质颗粒的存在会令润滑水膜的最大压力增大、最小膜厚降低;杂质颗粒的尺寸越大,形状越接近圆形,形成的润滑水膜厚度越低,压力也越大;杂质颗粒的存在会造成压力骤变从而在水膜中逸出气泡,形成气穴现象。

关键词：水润滑赛龙轴承杂质颗粒多重网格法主轴变速

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从风、热、痰、郁论治小儿咳嗽

中国民族民间医药 2025年第1期34卷 14-17页

作者：林佳鑫陈琳艾军广西中医药大学广西南宁530200

小儿咳嗽是小儿常见的肺系病证,临床以咳嗽为主症。外邪已去,尚未内伤到脏腑的咳嗽日趋常见,外感六淫、内伤脏腑的二元化的病因学分类,忽视了小儿咳嗽在证候病机学上内外统一的整体观,已不能满足小儿咳嗽诊疗的需要。本研究根据中医学... 详细信息

小儿咳嗽是小儿常见的肺系病证,临床以咳嗽为主症。外邪已去,尚未内伤到脏腑的咳嗽日趋常见,外感六淫、内伤脏腑的二元化的病因学分类,忽视了小儿咳嗽在证候病机学上内外统一的整体观,已不能满足小儿咳嗽诊疗的需要。本研究根据中医学理论和各医家临床实践经验,提出小儿咳嗽病机关键为“风、热、痰、郁”,以“火郁发之”来阐释小儿咳嗽之证治,以为临床诊治提供参考。

关键词：小儿咳嗽火郁发之中医病机儿童

Extremal Problems Related to Gauss-John Position

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Acta Mathematica Sinica,English Series 2012年第12期28卷 2527-2534页

作者： ai jun LI Gang Song LENG School of Mathematics and Information Science Henan Polytechnic University Department of Mathematics Shanghai University

In this paper, we consider the extremal problem of the ;p-norm： min{;p（TK）, o E TK C L, T E GL（n）}, where K, L are two convex bodies in Rn. Using the optimization theorem of John, we give necessary conditions for K to be in extremal position in terms of a decomposition of the identity. Fhrthermore, the weaker optimization problem, min{（lp（TK））p ： TK C B2n,TK Sn-1 ≠ O,T E GL（n）}, is also considered. As an application, the geometric distance between the unit ball B2n and a centrally symmetric convex body K is obtained.

关键词： Gauss-John position optimization theorem of John lp-norm contact pair

Neighbor Sum Distinguishing Total Colorings of Graphs with Bounded Maximum Average Degree

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Acta Mathematica Sinica,English Series 2014年第4期30卷 703-709页

作者： ai jun DONG Guang Hui WANG School of Science Shandong Jiao Tong University School of Mathematics Shandong University

A proper [h]-total coloring c of a graph G is a proper total coloring c of G using colors of the set [h] ={1, 2,..., h}. Let w（u） denote the sum of the color on a vertex u and colors on all the edges incident to u. For each edge uv ∈ E（G）, if w（u） ≠ w（v）, then we say the coloring c distinguishes adjacent vertices by sum and call it a neighbor sum distinguishing [h]-total coloring of G. By tndi∑ （G）, we denote the smallest value h in such a coloring of G. In this paper, we obtain that G is a graph with at least two vertices, if mad（G）〈 3, then tndi∑ （G） ≤k ＋ 2 where k = max{△（G）, 5}. It partially confirms the conjecture proposed by Pilgniak and Wolniak.

关键词： Total coloring neighbor sum distinguishing total colorings average degree

COVID-19 with asthma:A case report

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World Journal of Clinical Cases 2020年第15期8卷 3355-3364页

作者： ai-Ling Liu Ning Xu ai-jun Li Department of Pulmonary and Critical Care Medicine Weihai Municipal HospitalShandong UniversityWeihai 264200Shandong ProvinceChina

BACKGROUND Coronavirus disease 2019(COVID-19)is a public health emergency of international *** global population lacks immunity to COVID-19 and is generally *** conditions,especially chronic respiratory diseases,may affect progression,treatment and prognosis of *** SUMMARY We report a patient with confirmed COVID-19 combined with *** took 41 d from disease onset to discharge to obtain two negative tests for this *** This case indicates the dynamic clinical characteristics,laboratory and computed tomography findings and adjustment of treatment,and the possible relationship between glucocorticoid therapy and coronavirus clearance.

关键词： COVID-19 Asthma Glucocorticoids Respiratory passage mucosa immune system Case report