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Impulse Observability and Impulse Controllability of Regular Degenerate Evolution Systems

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Journal of Systems Science & Complexity 2016年第4期29卷 933-945页

作者： ge Zhaoqiang Department of Applied Mathematics Xi’an Jiaotong University

Impulse observability and impulse controllability of regular degenerate evolution systems are discussed by using functional analysis and operator theory in Banach space. Necessary and sufficient conditions for the impulse observability and impulse controllability of the system are obtained. This research is theoretically important for studying the design of the degenerate evolution system.

关键词： Impulse controllability impulse observability regular degenerate evolution systems.

μ-Separations in generalized topological spaces

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Applied Mathematics(A Journal of Chinese Universities) 2010年第2期25卷 243-252页

作者： ge Xun ge Ying School of Mathematical Sciences Soochow University Jiangsu 215006 China College of Zhangjiagang Jiangsu University of Science and Technology Jiangsu 215600 China

This paper takes some investigations on generalized topological spaces with some μ- separations. Some characterizations of μTi-spaces for i = 0, 1, 2, 3, 4, μTn-spaces and μR0-spaces are obtained and some relation... 详细信息

关键词： generalized topological space μ-separation μTi-space (i = 0 1,2 3 4 D) μR0-space.

A replacement name for Chrysolina mikhailovi Lopatin, 2011(Coleoptera:Chrysomelidae:Chrysomelinae), primary junior homonym of Ch. mikhailovi ge & Daccordi, 2011

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Zoological Systematics 2020年第1期45卷 69-70页

作者： Xiaolong Wang Siqin ge Shaoqin Li Department of Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhan 430072China Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China

A replacement name is provided for Chrysolina mikhailovi Lopatin, 2011, a primary junior homonym of Ch. mikhailovi ge & Daccordi, 2011, namely Ch. yurimikhailovi nomen novum. Habitus and aedeagus of Ch. mikhailovi ge ... 详细信息

关键词： Coleoptera Chrysomeloidea Chrysomelidae Chrysolina homonym

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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气固多相催化剂内扩散和反应研究进展

石油炼制与化工 2025年第1期56卷 30-39页

作者：李昕晖李成祥葛蔚沈阳化工大学沈阳110142 中国科学院过程工程研究所介科学与工程全国重点实验室中国科学院大学化学工程学院

化工过程中化学反应通常与传递过程共存,气固多相催化剂一般具有复杂多级孔道结构,其催化性能更是取决于其孔道内反应与扩散过程的耦合。揭示反应和扩散耦合规律,准确获得催化剂颗粒尺度上的反应动力学,对新型催化剂优化设计和制备具有... 详细信息

化工过程中化学反应通常与传递过程共存,气固多相催化剂一般具有复杂多级孔道结构,其催化性能更是取决于其孔道内反应与扩散过程的耦合。揭示反应和扩散耦合规律,准确获得催化剂颗粒尺度上的反应动力学,对新型催化剂优化设计和制备具有重要的科学研究意义和工业应用价值。综述了气固多相催化剂孔道内扩散和反应过程的最新研究进展和反应-扩散耦合的机制,重点介绍反应-扩散耦合模拟研究中的不同模型和方法及其在气固催化反应中的应用。指出将机器学习等人工智能方法和多尺度模拟相结合将会成为研究复杂催化反应体系的一种强大工具。

关键词：反应传递耦合拟颗粒多尺度介尺度分子模拟

An exact null controllability of stochastic singular systems

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Science China(Information Sciences) 2021年第7期64卷 247-249页

作者： Zhaoqiang ge Xiaochi ge School of Mathematics and Statistics Xi'an Jiaotong University Cass Business School City University of London

Dear editor,The stochastic singular system is also called the stochastic differential algebraic system, stochastic descriptor system, generalized stochastic system, and stochastic degenerate system (e.g.,[1–4]). This type of system is found in numerous fields of application, which include fluid dynamics, the modeling of multi-body mechanisms, finance, inputoutput economics and the problem of protein folding.

关键词： stochastic system impulse solution exact null controllability Ito singular system stochastic Laplace transform

On the Minimal Solutions of Variational Inequalities in Orlicz-Sobolev Spaces

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Chinese Annals of Mathematics,Series B 2021年第3期42卷 333-356页

作者： ge DONG Department of Arts and Science Teaching Shanghai University of Medicine and Health SciencesShanghai 201318China

In this paper,the author studies the existence of the minimal nonnegative solutions of some elliptic variational inequalities in Orlicz-Sobolev spaces on bounded or unbounded *** gets some comparison results between different solutions as tools to pass to the limit in the problems and to show the existence of the minimal solutions of the variational inequalities on bounded domains or unbounded *** both cases,coercive and noncoercive operators are *** sufficient and necessary conditions for the existence of the minimal nonnegative solution of the noncoercive variational inequality on bounded domains are established.

关键词： Orlicz-Sobolev spaces Elliptic variational inequalities Minimal nonnegative solutions Bounded domains Unbounded domains

GGCHEMPY: A Pure Python-based Gas-grain Chemical Code for Efficient Simulation of Interstellar Chemistry

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Research in Astronomy and Astrophysics 2022年第1期22卷 30-45页

作者： Jixing ge Chinese Academy of Sciences South America Center for Astronomy National Astronomical ObservatoriesCASBeijing 100101China

In this paper,we present a new gas-grain chemical code for interstellar clouds written in pure Python(GGCHEMPY(GGCHEMPY is available on https://***/Jixingge/GGCHEMPY)).By combining with the high-performance Python compiler Numba,GGCHEMPY is as efficient as the Fortran-based *** the Python features,flexible computational workflows and extensions become *** a showcase,GGCHEMPY is applied to study the general effects of three-dimensional projection on molecular distributions using a two-core system which can be easily extended for more complex *** comparing the molecular distribution differences between two overlapping cores and two merging cores,we summarized the typical chemical differences such as N2 H+,HC3 N,C2 S,H2 CO,HCN and C2 H,which can be used to interpret 3 D structures in molecular clouds.

关键词： astrochemistry (ISM:)evolution ISM:molecules ISM:abundances methods:numerical

Notes on shear viscosity bound violation in anisotropic models

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Science China(Physics,Mechanics & Astronomy) 2016年第3期59卷 56-59页

作者： XianHui ge Department of Physics Shanghai University Shanghai 200444 China Kvali Institute for Theoretical Physics Beijing 100190 China

The shear viscosity bound violation in Einstein gravity for anisotropic black branes is discussed, with the aim of constraining the deviation of the shear viscosity-entropy density ratio from the shear viscosity bound using causality and thermodynamics *** results show that no stringent constraints can be imposed. The diffusion bound in anisotropic plaases is also studied. Ultimately, it is concluded that shear viscosity violation always occurs in cases where the equation of motion of the metric fluctuations cannot be written in a form identical to that of the minimally coupled massless scalar fields.

关键词： the anti-de Sitter-conformal field theory correspondence shear viscosity-entropy density ratio diffusion bounds