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Global stability analysis for a virus dynamics model with distributed intracellular delays and eclipse stages

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Global stability analysis for a virus dynamics model with di...

不同压力环境下不透明非碳化ABS材料的热解温度模型研究

第37届中国控制会议

作者： Yongqi Liu yanghui hu College of Applied Mathematics Beijing Normal University College of Applied Science Beijing Institute of Technology

This paper investigates the global asymptotic stability of an HIV dynamics model with discrete intracellular delays incorporating Beddington-De Angelis functional *** eclipse stage of infected cells（*** infected cells）,not yet producing virus,is included in our *** consider nonnegativity and boundedness of solutions and global asymptotic stability of the uninfected and infected equilibria（steady states） of the *** have proved that if the basic reproduction number R0 is less than unity,then the disease-free equilibrium is globally asymptotically stable,and if R0 is greater than unity,then the infected equilibrium is globally asymptotically stable by constructing suitable Lyapunov *** results obtained show that the global dynamics are completely determined by the basic reproduction number R0.

关键词： Global stability Beddington-De Angelis functional response Discrete intracellular delays Lyapunov functionals

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火灾科学 2017年第2期26卷 79-86页

作者：康茹雪胡杨慧宗若雯支有冉中国科学技术大学火灾科学国家重点实验室合肥230026 中国科学技术大学苏州研究院苏州城市公共安全重点实验室苏州215123 南京工程学院机械工程学院南京211167

在不同热流强度下,利用智能步进低压实验仓对不透明非碳化聚合物材料丙烯腈-丁二烯-苯乙烯(ABS)在不同压力情况下的热解过程中的表面及背面温度进行了实时测量,建立了表面吸收一维热解模型,预测了ABS在不同外界热流密度下,不同压力环境... 详细信息

在不同热流强度下,利用智能步进低压实验仓对不透明非碳化聚合物材料丙烯腈-丁二烯-苯乙烯(ABS)在不同压力情况下的热解过程中的表面及背面温度进行了实时测量,建立了表面吸收一维热解模型,预测了ABS在不同外界热流密度下,不同压力环境下表面温度及背面温度随时间的变化;并将实验测量值与模型模拟值进行对比。结果表明,非碳化聚合物的表面吸收一维热解模型在高热流密度下对温度的预测情况优于在低热流密度下对温度的预测结果,总体来说,模拟计算结果与实验测量值较为一致。

关键词：一维热解模型环境压力表面温度背面温度

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新时代新征程优化公安组织结构论纲

辽宁警察学院学报 2024年第2期26卷 1-10页

作者：赵炜胡杨慧中国人民公安大学北京100038 辽宁警察学院治安管理系辽宁大连116036

优化公安组织结构是深入贯彻党的二十大决策部署、全面深化公安改革以及全面建设法治公安的重要任务。通过深化改革和挖掘内部潜力,对公安组织的职能结构、层级结构、部门结构、职位结构以及编制结构进行优化,从公安组织结构设计必须考... 详细信息

优化公安组织结构是深入贯彻党的二十大决策部署、全面深化公安改革以及全面建设法治公安的重要任务。通过深化改革和挖掘内部潜力,对公安组织的职能结构、层级结构、部门结构、职位结构以及编制结构进行优化,从公安组织结构设计必须考虑的七大要素、正确处理大部门大警种制和职务与职级并行制度的关系、探索建立警衔主导的等级制度、积极借鉴境外警察组织结构设计的有益经验、推动制定“公安机关组织法”等五个方面展开论述,为优化公安组织结构提供全方位的理论和法律支撑。

关键词：新时代优化公安组织结构论纲

75例病毒性脑炎患者的脑电图与经颅多普勒临床分析

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中国现代医学杂志 2009年第20期19卷 3168-3171页

作者：文芳向军邹婷胡艳辉熊艳春中南大学湘雅二医院神经内科湖南长沙410011 中南大学湘雅二医院功能神经外科湖南长沙410011 中南大学湘雅二医院脑电图和经颅多普勒室湖南长沙410011

目的探讨脑电图(EEG)及经颅多普勒(TCD)对病毒性脑炎早期诊断、判断病情严重程度和临床预后的应用价值。方法对75例病毒性脑炎患者发病2～15d内的脑电图和经颅多普勒结果进行回顾性分析。结果75例病毒性脑炎患者15d内脑电图异常62例,阳... 详细信息

目的探讨脑电图(EEG)及经颅多普勒(TCD)对病毒性脑炎早期诊断、判断病情严重程度和临床预后的应用价值。方法对75例病毒性脑炎患者发病2～15d内的脑电图和经颅多普勒结果进行回顾性分析。结果75例病毒性脑炎患者15d内脑电图异常62例,阳性率82.7%,以额颞叶最为多见。TCD异常65例,阳性率86.7%,主要表现为颈内动脉系统血流动力学的改变,大脑前动脉流速与病情严重程度成正相关。意识障碍越重,EEG和TCD的阳性率越高,异常程度也越高。结论脑电图对病毒性脑炎特别是伴有癫痫患者的早期诊断有重要价值,TCD可反映病毒性脑炎的血流动力学,在判断病情严重程度和预后方面有一定应用价值。

关键词：病毒性脑炎脑电图经颅多普勒

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公交都市建设示范工程考核评价指标优化

城市交通 2017年第3期15卷 43-51页

作者：安健郭继孚董杨慧胡学文全永燊北京交通发展研究院城市交通运行仿真与决策支持北京市重点实验室北京100073 北京智诚智达交通科技有限公司北京100044

公交都市建设示范工程已推进落实4年有余,部分城市在指标完成情况、缓解城市交通压力、改善人居环境等方面取得的成效并不理想。公交都市考核评价指标体系作为政策落地中最为重要的一环,首当其冲成为反思的关键。在浅析现行指标存在问... 详细信息

公交都市建设示范工程已推进落实4年有余,部分城市在指标完成情况、缓解城市交通压力、改善人居环境等方面取得的成效并不理想。公交都市考核评价指标体系作为政策落地中最为重要的一环,首当其冲成为反思的关键。在浅析现行指标存在问题与面临挑战的基础上,以公交都市的应有内涵和目标为导向,探讨指标选取与设计的原则。将城市公共交通优先发展战略目标进行战术化分解,提出采用六项评判标准作为判断城市发展模式是否与公共交通优先发展理念吻合的基本准则。最后,对公交都市考核指标体系进行概念性优化并给出相关建议。

关键词：城市交通公交都市评价指标体系公共交通优先发展

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广东某高岭土选矿试验研究

非金属矿 2018年第3期41卷 56-58页

作者：张韬岑对对于阳辉胡锐潘卫苏州中材非金属矿工业设计研究院有限公司江苏苏州215004 国家非金属矿深加工工程技术研究中心江苏苏州215004

对广东某高岭土进行原矿性质分析和选矿试验研究,确定了合理的工艺流程,原矿经捣浆-除砂-φ75 mm水力旋流器提纯-磁选后,可以获得优质陶瓷用高岭土,产率为24.01%,Al_2O_3含量为37.11%,SiO_2含量为45.46%,Fe_2O_3含量为0.68%,烧成白度为9... 详细信息

对广东某高岭土进行原矿性质分析和选矿试验研究,确定了合理的工艺流程,原矿经捣浆-除砂-φ75 mm水力旋流器提纯-磁选后,可以获得优质陶瓷用高岭土,产率为24.01%,Al_2O_3含量为37.11%,SiO_2含量为45.46%,Fe_2O_3含量为0.68%,烧成白度为90.7%,为该地区高岭土的开发利用提供了依据。

关键词：高岭土选矿磁选白度

ON THE NECESSARY AND SUFFICIENT CONDITIONS TO SOLVE A HEAT EQUATION WITH GENERAL ADDITIVE GAUSSIAN NOISE

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Acta Mathematica Scientia 2019年第3期39卷 669-690页

作者： Yaozhong hu yanghui LIU Department of Mathematical and Statistical Sciences University of AlbertaEdmontonT6G 2G1Canada Department of Mathematics Purdue UniversityWest LafayetteIN 47907USA

In this note, we consider stochastic heat equation with general additive Gaussian noise. Our aim is to derive some necessary and sufficient conditions on the Gaussian noise in order to solve the corresponding heat equation. We investigate this problem invoking two differen t met hods, respectively, based on variance compu tations and on pat h-wise considerations in Besov spaces. We are going to see that, as anticipated, both approaches lead to the same necessary and sufficient condition on the noise. In addition, the path-wise approach brings out regularity results for the solution.

关键词： Stochastic heat equation general Gaussian noise L^(2) solution sufficient and necessary condition Wong-Zakai approximation pathwise solution Holder continuity Besov space

Whole-exome sequencing reveals genetic risks of early-onset sporadic dilated cardiomyopathy in the Chinese Han population

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Science China(Life Sciences) 2022年第4期65卷 770-780页

作者： Lei Xiao Dongyang Wu Yang Sun Dong hu Jiaqi Dai yanghui Chen Daowen Wang Division of Cardiology Department of Internal MedicineTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiologic Disorders Huazhong University of Science and TechnologyWuhan430030China

To reveal genetic risks of early-onset sporadic dilated cardiomyopathy(DCM) patients in the Chinese Han population, we enlisted 363 DCM cases and 414 healthy controls. Whole-exome sequencing and phenotypic characterization were conducted. In total, we identified 26 loss-of-function(LOF) candidates and 66 pathogenic variants from 33 genes, most of which were *** deleterious variants can account for 25.07%(91/363) of all patients. Furthermore, rare missense variants in 21 genes were found to be significantly associated with DCM in burden tests. Other than rare variants, twelve common SNPs were significantly associated with an increased risk of DCM in allele-based genetic model association analysis. Of note, in the cumulative risk model, high-risk subjects had a 3.113-fold higher risk of developing DCM than low-risk subjects. Also, DCM in the high-risk group had a younger age of onset than that in the low-risk group. In terms of cardiac function, the mean left ventricular ejection fraction of patients with the deleterious variants was lower than those without(27.73%±10.02% vs. 30.61%±10.85%, P=0.026).To conclude, we mapped a comprehensive atlas of genetic risks in Chinese patients with DCM that might lead to new insights into the mechanisms and risk stratification for DCM.

关键词： DCM genetics case-control risk stratification

Classification and Prediction on Rural Property Mortgage Data with Three Data Mining Methods

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Journal of Software Engineering and Applications 2018年第7期11卷 348-361页

作者： Kaixi Zhang Yingpeng hu yanghui Wu School of Science Northwest A&F University Yangling China

The Farmers Property Mortgage Policy is a strategic financial policy in western China, a relatively underdeveloped region. Many contradictions and conflicts exist in the process between the strong demand for the loans by farmers and the strict risk control by the financial institutions. The rural finance corporations should use scientific analysis and investigation of the potential households for overall evaluation of the customers. These include historical credit rating, present family situation, and other related information. Three different data mining methods were applied in this paper to the specifically-collected household data. The objective was to study which factor could be the most important in determining loan demand for households, and in the meanwhile, to classify and predict the possibility of loan demand for the potential customers. The results obtained from the three methods indicated the similar outputs, income level, land area, the way of loan, and the understanding of policy were four main factors which decided the probability of one specific farmer applying for a credit loan. The results also embodied the difference within the three methods for classifying and predicting the loan anticipation for the testing households. The artificial neural network model had the highest accuracy of 91.4 which is better than the other two methods.

关键词： Rural Property Mortgage Bayesian Network Artificial Neural Network Logistic Regression Classification and Prediction