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Journal of Computational Mathematics 2024年第3期42卷 814-850页

作者： Dingwen Deng zhijun li College of Mathematics and Information Science Nanchang Hangkong UniversityNanchang 330063China

Du Fort-Frankel finite difference method(FDM)was firstly proposed for linear diffusion equations with periodic boundary conditions by Du Fort and Frankel in *** is an explicit and unconditionally von Neumann stable ***,there has been no research work on numerical solutions of nonlinear Schrödinger equations with wave operator by using Du Fort-Frankel-type finite difference methods(FDMs).In this study,a class of invariants-preserving Du Fort-Frankel-type FDMs are firstly proposed for one-dimensional(1D)and two-dimensional(2D)nonlinear Schrödinger equations with wave *** using the discrete energy method,it is shown that their solutions possess the discrete energy and mass conservative laws,and conditionally converge to exact solutions with an order of for ofο(T^(2)+h_(x)^(2)+(T/h_(x))^(2))1D problem and an order ofο(T^(2)+h_(x)^(2)+h_(Y)^(2)+(T/h_(X))^(2)+(T/h_(y))^(2))for 2D problem in ***,τdenotes time-step size,while,hx and hy represent spatial meshsizes in x-and y-directions,***,by introducing a stabilized term,a type of stabilized invariants-preserving Du Fort-Frankel-type FDMs are *** not only preserve the discrete energies and masses,but also own much better stability than original ***,numerical results demonstrate the theoretical analyses.

关键词： Nonlinear Schrodinger equations with wave operator Du Fort-Frankel finite difference methods Discrete energy and mass conservative laws Numerical convergence

An immunogenic cell death-related signature for prediction of prognosis and response to immunotherapy in breast cancer

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Chinese Medical Journal 2024年第4期137卷 487-489页

作者： Cong li Fengzhu Guo Jingtong Zhai Xiaohan liu zhijun li Binghe Xu Department of Medical Oncology National Cancer CenterNational Clinical Research Center for CancerCancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Medical Oncology Sun Yat-sen University Cancer CenterGuangzhouGuangdong 510060China Department of Medical Oncology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China Department of Histology and Embryology Basic Medical CollegeChina Medical UniversityShenyangLiaoning 110122China

To the Editor:Tumor immune microenvironment plays a key role in breast cancer development and progression,which determines the long-term survival of breast cancer *** data have revealed that the application of cancer immunotherapy has some limitations,including generating weak immune responses due to inadequate delivery of immunostimulants to the immune cells.^([1])Thus,current clinical efforts are primarily focused on developing immune-based chemotherapy that can convert non-responders to responders.^([2])Immunogenic cell death(ICD)is a form of regulated cell death that is sufficient to activate an adaptive immune response.

关键词： breast immunotherapy chemotherapy

Microscopic analysis on eukaryotic algae and cyanobacteria in nine seasonal lakes and ponds in Vestfjella,Dronning Maud Land,Antarctica

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Advances in Polar Science 2024年第2期35卷 206-218页

作者： Lauri ARVOLA Matti LEPPÄRANTA li zhijun Lammi Biological Station University of HelsinkiLammi FI-16900Finland Department of Physics University of HelsinkiHelsinki FI-00014Finland State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116023China

Antarctic continental lakes and ponds are among the most impoverished aquatic environments on earth but many of them support flourishing populations of cyanobacteria,eukaryotic algae,protozoans,and some multicellular *** this study,we present results of a microscopic analysis of cyanobacteria and eukaryotic algae from nine diverse types of Antarctic continental water bodies during one austral *** results supplement and enlarge our previous studies on the limnological characteristics of the epiglacial and supraglacial lakes and ponds in Dronning Maud Land,an area that has received little attention from *** taxon with highest frequency among the samples(n=79)was Mesotaenium ***,a eukaryotic Zygnematophyceae,which occurred in 82%of the samples with a maximum cell density of 68 cells·mL^(-1).The taxa with second and third highest frequency were the prokaryotes Gloeocapsopsis(60%)and Leptolyngbya(41%),followed by Chlamydomonas(34%)and Cyanothece(29%).The number of taxa varied between 7-21 among the lakes and ponds,being highest in a supraglacial lake,and lowest in an epiglacial *** results did not reveal any obvious correlation between the abundance of any taxa and the water chemistry,but water bodies with inorganic sediments had higher cell densities and biomasses than those without *** suggests the importance of sediment in supporting biological diversity in these ultraoligotrophic lakes and ponds.

关键词： Antarctic continental lakes Antarctic continental ponds cyanobacteria algae protozoa rotifers tardigrada

Study of the spatial growth of stimulated Brillouin scattering in a gas-filled hohlraum via detecting the driven ion acoustic wave

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Matter and Radiation at Extremes 2024年第2期9卷 36-49页

作者： Chaoxin Chen Tao Gong Zhichao li liang Hao Yonggang liu Xiangming liu Hang Zhao Yaoyuan liu Kaiqiang Pan Qi li Sanwei li zhijun li Sai Jin Feng Wang Dong Yang Laser Fusion Research Center China Academy of Engineering PhysicsMianyangSichuan 621900People’s Republic of China Institute of Applied Physics and Computational Mathematics Beijing 100094People’s Republic of China

In an experiment performed on the Shenguang-III prototype laser facility, collective Thomson scattering (TS) is used to study the spatialgrowth of stimulated Brillouin scattering (SBS) in a gas-filled hohlraum by detecting the SBS-driven ion acoustic wave. High-quality timeresolved SBS and TS spectra are obtained simultaneously in the experiment, and these are analyzed by a steady-state code based on theray-tracing model. The analysis indicates that ion–ion collisions may play an important role in suppressing SBS growth in the Au plasma;as aresult, the SBS excited in the filled gas region is dominant. In the early phase of the laser pulse, SBS originates primarily from the high-densityplasma at the edges of the interaction beam channel, which is piled up by the heating of the interaction beam. Throughout the duration of thelaser pulse, the presence of the TS probe beam might mitigate SBS by perturbing the density distribution around the region overlapping withthe interaction beam.

关键词： scattering filled Brillouin

Dynamics and synchronization in a memristor-coupled discrete heterogeneous neuron network considering noise

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Chinese Physics B 2024年第2期33卷 537-544页

作者：晏询李志军李春来 School of Automation and Electronic Information Xiangtan UniversityXiangtan 411105China School of Computer Science&School of Cyberspace Science Xiangtan UniversityXiangtan 411105China

Research on discrete memristor-based neural networks has received much ***,current research mainly focuses on memristor–based discrete homogeneous neuron networks,while memristor-coupled discrete heterogeneous neuron networks are rarely *** this study,a new four-stable discrete locally active memristor is proposed and its nonvolatile and locally active properties are verified by its power-off plot and DC V–I *** on two-dimensional(2D)discrete Izhikevich neuron and 2D discrete Chialvo neuron,a heterogeneous discrete neuron network is constructed by using the proposed discrete memristor as a coupling synapse connecting the two heterogeneous *** the coupling strength as the control parameter,chaotic firing,periodic firing,and hyperchaotic firing patterns are *** particular,multiple coexisting firing patterns are observed,which are induced by different initial values of the *** synchronization between the two heterogeneous neurons is discussed and it is found that they can achieve perfect synchronous at large coupling ***,the effect of Gaussian white noise on synchronization behaviors is also *** demonstrate that the presence of noise not only leads to the transition of firing patterns,but also achieves the phase synchronization between two heterogeneous neurons under low coupling strength.

关键词： heterogeneous neuron network discrete memristor coexisting attractors synchronization noise

Dynamical behavior of memristor-coupled heterogeneous discrete neural networks with synaptic crosstalk

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Chinese Physics B 2024年第2期33卷 545-550页

作者：马铭磷熊康灵李志军贺少波 School of Automation and Electronic Information Xiangtan UniversityXiangtan 411105China

Synaptic crosstalk is a prevalent phenomenon among neuronal synapses,playing a crucial role in the transmission of neural ***,considering synaptic crosstalk behavior and investigating the dynamical behavior of discrete neural networks are highly *** this paper,we propose a heterogeneous discrete neural network(HDNN)consisting of a three-dimensional KTz discrete neuron and a Chialvo discrete *** two neurons are coupled mutually by two discrete memristors and the synaptic crosstalk is *** impact of crosstalk strength on the firing behavior of the HDNN is explored through bifurcation diagrams and Lyapunov *** is observed that the HDNN exhibits different coexisting attractors under varying crosstalk ***,the influence of different crosstalk strengths on the synchronized firing of the HDNN is investigated,revealing a gradual attainment of phase synchronization between the two discrete neurons as the crosstalk strength decreases.

关键词： discrete memristor synaptic crosstalk coexisting attractor phase synchronization

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画地分守:明代江防信地区划与职守研究

学术月刊 2024年第1期56卷 176-191页

作者：李智君厦门大学历史与文化遗产学院福建厦门361005

明代长江一线的军事防御,即江防,是仅次于边防、海防的第三大国土军事防御体系。信地是江防精细化军事空间驻防的产物,由明初的新江口营随着管理范围的扩大演变而来。每个信地营署和起止点的选择,都遵循一定的军事地理原则。营署一般设... 详细信息

明代长江一线的军事防御,即江防,是仅次于边防、海防的第三大国土军事防御体系。信地是江防精细化军事空间驻防的产物,由明初的新江口营随着管理范围的扩大演变而来。每个信地营署和起止点的选择,都遵循一定的军事地理原则。营署一般设置于军事要塞或交通要冲,信地上、下至点设在自然分界线或府、县政区分界线,便于一营之地统一管理。江、海防信地分界线,恰好处于长江口的潮流界。江防对重要交通枢纽或军事要冲的防御,采用信地交叉的方法。对江面社会治安问题,上江、应天府盗贼出没之地主要采用增加巡逻次数的方法来治理,下江则在治安问题突出或商民云集之地派兵驻守。备倭的任务主要由处在江海之交的圌山和三江口营负责。总之,无论是营署选址还是信地划分,都是基于明初国内外军事形势、沿江战争经验和长江水文环境作出的,故防御效果显著,保障了留都和东南财赋之地的社会安全。

关键词：江防信地区划盗贼盐徒军事控制

建构中国自主的公共政策评估知识体系:必要性、基本框架与主要途径

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学术月刊 2024年第4期56卷 5-15页

作者：李志军张毅中国海洋大学管理学院山东青岛266102 对外经济贸易大学政府管理学院北京100029

公共政策评估是经世致用之学。中国公共政策评估知识体系演变的历史、学科体系的完备以及理论体系的发展嵌于国家治理现代化进程之中。现有的评估知识体系主要有两方面不足:一是评估知识体系构建之初主要是引进西方的理论,随着中国公共... 详细信息

公共政策评估是经世致用之学。中国公共政策评估知识体系演变的历史、学科体系的完备以及理论体系的发展嵌于国家治理现代化进程之中。现有的评估知识体系主要有两方面不足:一是评估知识体系构建之初主要是引进西方的理论,随着中国公共政策评估体系迈入体制机制建设深水区,组成知识体系架构的西方理论与中国国情之间的不适用性越来越突出;二是重大政策和实践导向的本土化评估理论取得较大进展,适用性较强但普适性和学理性不足,无法对更高层次的知识体系构成贡献。由此,从宏观层面刻画和明确中国自主的公共政策评估知识体系框架与构建途径,引导理论创新、学科发展与知识生产,尤为必要。

关键词：公共政策评估知识体系学科体系学术体系

多孔介质微观结构对柴油机颗粒捕集器性能影响的模拟探究

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哈尔滨工程大学学报 2024年第5期45卷 886-893页

作者：李志军李智洋李振国王妍杨绵松天津大学内燃机燃烧学国家重点实验室天津300072 中国汽车技术研究中心有限公司天津300300

为了优化柴油机颗粒捕集器的捕集、压降性能,本文基于孔径概率密度函数和孔隙率分布函数建立了二维柴油机颗粒捕集器孔道微观结构模型,考虑了拦截机理和扩散机理用以计算颗粒在过滤器中的沉积分布情况和捕集效率。计算结果表明:多孔介... 详细信息

为了优化柴油机颗粒捕集器的捕集、压降性能,本文基于孔径概率密度函数和孔隙率分布函数建立了二维柴油机颗粒捕集器孔道微观结构模型,考虑了拦截机理和扩散机理用以计算颗粒在过滤器中的沉积分布情况和捕集效率。计算结果表明:多孔介质微观结构和入口速度对颗粒捕集效率的影响与粒径有关,100 nm粒径颗粒随流速增大初始捕集效率降低最为明显,1000 nm粒径颗粒在不同均匀性的过滤壁下的捕集效率差超过了30%;孔径分布函数方差越大,颗粒就会更多地分布在过滤壁前端,捕集效率也越高,但较大的孔径方差会导致捕集器的初始压降增大和捕集过程结束时的性能出现恶化。

关键词：颗粒捕集器数值模拟微观结构概率密度函数压降捕集效率

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基于自抗扰控制器的无人艇航向自适应控制

船舶工程 2024年第5期46卷 103-109,119页

作者：向前李志俊武昌首义学院信息科学与工程学院武汉430064 武汉理工大学自动化学院武汉430070 武汉南华工业设备工程股份有限公司武汉430200

为了提高水面无人艇在外界干扰和自身运动状态变化等非线性及不确定因素下的航向控制精度,针对常规自抗扰控制(ADRC)在船舶航向控制中存在的参数整定难这一问题,提出将粒子群优化算法(PSO)与径向基函数神经网络(RBF)相结合的ADRC参数自... 详细信息

为了提高水面无人艇在外界干扰和自身运动状态变化等非线性及不确定因素下的航向控制精度,针对常规自抗扰控制(ADRC)在船舶航向控制中存在的参数整定难这一问题,提出将粒子群优化算法(PSO)与径向基函数神经网络(RBF)相结合的ADRC参数自适应整定和无人艇航向精确控制策略。设计一个RBF网络用于准实时无人艇运动模型建模。在此基础上,运用粒子群算法对无人艇航向ADRC控制器参数整定进行优化。仿真试验结果表明:设计的RBF-PSO-ADRC控制器在无人艇的航向控制中相比常规ADRC控制器和比例-积分-微分控制器(PID)控制器表现出更好的动态响应特性和稳定性,对未知扰动也具有较强的鲁棒性和抗干扰能力。RBF-PSO-ADRC控制器实现了复杂环境下ADRC控制器参数的自适应优化整定,这对于高精度的无人艇航向控制和航线跟踪具有一定实际意义,可为水面无人艇操纵设计提供有益参考。

关键词：无人艇航向控制粒子群优化 RBF网络自适应控制