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Testing the distance-duality relation with the baryon acoustic oscillations data and type Ia supernovae data

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Communications in Theoretical Physics 2020年第4期72卷 71-77页

作者： jun chen School of Science Kaili UniversityKailiGuizhou 556011China

In this letter,the cosmic distance-duality relation has been constrained with a model-independent method by combining the baryon acoustic oscillation(BAO)data and the type Ia supernova(SNe Ia)*** results show that this relation is consistent with the observational data in the 68.27%error range,except for the instance of Union 2.1 plus BAO with the statistic errors only,where the relation is consistent with the observations in the 95.45%error *** study the result of the uncertainty of the Hubble constant on the investigation of this relation,we treat the dimensionless Hubble constant h as a free parameter and get that the observational data favors the relation in the 68.27%error *** then h has been marginalized and the results support that this relation is favored by the observations in the 68.27%error range too.

关键词： Baryon acoustic oscillation the cosmic distance-duality relation type Ia supernovae

Minimizers of curl prescribed full trace

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Applied Mathematics(A Journal of Chinese Universities) 2020年第2期35卷 157-165页

作者： chen jun College of Computer and Information Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002China

This paper concerns the minimization problem of L2 norm of curl of vector fields prescribed full trace on the boundary of a multiconnected bounded *** existence of the minimizers in H1 are shown by orthogonal decompositions of vector function spaces and a constructed auxiliary variational *** the H2 estimate of the type II divergence-free part of the minimizers is established by div-curl-gradient type estimates of vector fields.

关键词： variational problem operator curl full trace multiconnected domain semilinear degenerate system

Evaluation of mechanical properties of structural materials by a spherical indentation based on the representative strain-an improved algorithm at great depth ratio

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Acta Metallurgica Sinica(English Letters) 2011年第5期24卷 405-414页

作者： jun chen Huaining chen Jinq chen Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

At great depth ratio, two methodologies based on the representative strain were improved to extract mechanical properties of metallic engineering structural materials from P-h curve of an indentation response. The improved aspects include： the com- bination of great ratio h1/R=0.1 and h2/R=0.4 replaced h1/R=0.01 and h2/R=0.06 （Cao＇s method） and h1/R=0.1 and h2/R=0.3 （Ogasawara＇s method）; three types of metallic engineering structural materials with obviously different elastic modulus were dealt with to get their calculation parameters, respectively; a new parameter reflecting the effect of work-hardening exponent n was introduced to get the dimensionless function which is independent of n and a relationship between W/（h3σrS） and E^＊/（σrS） at great depth ratio. By using the results of finite element simulation, the efficiency and accuracy of the improved method have been proved, and it showed that the accuracv of the improved method is much better than the former method.

关键词： Spherical indentation Representative strain Metallicengineering structural material Mechanical property Great depth ratio

A novel proactive soft load balancing framework for ultra dense network

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Digital Communications and Networks 2023年第3期9卷 788-796页

作者： Miaona Huang jun chen School of Electrical Engineering and Intelligentization Dongguan University of TechnologyDongguanGuangdong523808China Huawei Technology Shenzhen518129China

A major challenge for the future wireless network is to design the self-organizing *** reactive self-organizing model of traditional networks needs to be transformed into an active self-organizing *** to the user mobility and the coverage of small cells,the network load often becomes unbalanced,resulting in poor network *** management has become an important issue to ensure seamless communication when users move between cells,and proactive mobility management is one of the important functions of the active Self-Organizing Network(SON).This paper proposes a proactive mobility management framework for active SON,which transforms the original reactive load balancing into a forward-aware and proactive load *** proposed framework firstly uses the BART model to predict the users’temporal and spatial mobility based on a weekly cycle and then formulate the MLB optimization problem based on the soft *** solutions are proposed to solve the above MLB *** simulation results show that the proposed method can better optimize the network performance and realize intelligent mobile management for the future network.

关键词： 5G and beyond Proactive load balancing Heterogeneous network Soft load Location prediction

Empathy for Distress in Humans and Rodents

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Neuroscience Bulletin 2018年第1期34卷 216-236页

作者： jun chen Institute for Biomedical Sciences of Pain Tangdu Hospital Fourth Military Medical University Xi'an 710038 China Key Laboratory of Brain Stress and Behavior PLA Xi'an 710038 China Beijing Institute for Brain Disorders Beijing 100069 China

Empathy is traditionally thought to be a unique ability of humans to feel, understand, and share the emotional state of others. However, the notion has been greatly challenged by the emerging discoveries of empathy for pain or distress in rodents. Because empathy is believed to be fundamental to the formation of prosocial, altruistic, and even moral behaviors in social animals and humans, studies associated with decoding the neural circuits and unraveling the underlying molecular and neural mecha- nisms of empathy for pain or distress in rodents would be very important and encouraging. In this review, the author set out to outline and update the concept of empathy from the evolutionary point of view, and introduce up-to-date advances in the study of empathy and its neural correlates in both humans and rodents. Finally, the author highlights the perspectives and challenges for the further use of rodent models in the study of empathy for pain or distress.

关键词： Empathy Pain Distress Neural correlates

Probing model-independent cosmic opacity and its spatial properties

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Research in Astronomy and Astrophysics 2016年第11期16卷 81-86页

作者： jun chen Department of Physics and Electronic Engineering Kaili University

Cosmic opacity and its spatial distribution have been constrained with a model independent method. The average opacity of the universe is not zero, but can be zero in the 1σ error range. The bestfit value of the spatial distribution of cosmic opacity is not a constant as the redshift varies, though a homogeneous and transparent universe is favored in the 2σ error range.

关键词： cosmology: observations -- cosmology: distance scale -- opacity

基于三矩形谐振腔非通MIM波导的四重法诺传感

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原子与分子物理学报 2025年第3期42卷 116-123页

作者：王叶壮沈宏君陈俊坤王雅雯宁夏大学物理学院银川750000

为了得到高灵敏度的生物传感器,设计了一种可以激发出四重法诺共振的非通金属-绝缘体-金属(Metal-Insulator-Metal,MIM)波导传感器.采用了上下对称结构,由一个竖放矩形谐振腔和两个横放矩形谐振腔与总线波导共同作用而得到了四重法诺共... 详细信息

为了得到高灵敏度的生物传感器,设计了一种可以激发出四重法诺共振的非通金属-绝缘体-金属(Metal-Insulator-Metal,MIM)波导传感器.采用了上下对称结构,由一个竖放矩形谐振腔和两个横放矩形谐振腔与总线波导共同作用而得到了四重法诺共振.采用了有限时域差分方法计算了此结构的传输特性与Z方向的归一化磁场,并详细分析了其法诺共振的产生机理.通过计算结构几何参数调节后的透射光谱,从而得出了四处法诺共振峰透射率和共振位置可以通过改变结构几何参数而获得独立调节.此外还发现在结构中添加不同浓度的葡萄糖溶液可以实现高折射率传感灵敏度(S),获得最高灵敏度2736.98nm/RIU,可以看出此结构对于折射率变化有很高的灵敏度,这为设计和优化纳米级别的折射率传感器提供了新的思路,还可以应用于电路构建前进行性能测试.

关键词：金属-绝缘体-金属传感器谐振腔法诺共振灵敏度

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Robust self-supported anode by integrating Sb2S3 nanoparticles with S,N-codoped graphene to enhance K-storage performance

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Science China Chemistry 2017年第12期60卷 1533-1539页

作者： Yanying Lu jun chen Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education College of Chemistry Nankai University Tianjin 300071 China

Developing high-performance anode materials for potassium-ion batteries is significantly urgent. We here demonstrate Sb_2S_3 nanoparticles(~20 nm) homogeneously dispersed in porous S,N-codoped graphene framework(Sb_2S_3-SNG) as a self-supported anode material for potassium-ion batteries. The rational structure design of integrating Sb_2S_3 nanoparticles with S,N-codoped graphene contributes to high reactivity, strong affinity, good electric conductivity, and robust stability of the composite, enabling superior K-storage performance. Moreover, the self-supported architecture significantly decreases the inactive weight of the battery, resulting in a high energy density of a Sb_2S_3-SNG/KVPO_4 F-C full cell to ~166.3 W h kg^(-1).

关键词： Sb2S3 nanoparticles S,N-codoping self-supported graphene foam anode potassium-ion batteries

CLUSTER SYNCHRONIZATION IN A COMPLEX DYNAMICAL NETWORK WITH TWO NONIDENTICAL CLUSTERS

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Journal of Systems Science & Complexity 2008年第1期21卷 20-33页

作者： Liang chen jun'an LU School of Mathematics and Statistics Wuhan University Wuhan 430072 China.

This paper further investigates cluster synchronization in a complex dynamical network with *** cluster contains a number of identical dynamical systems,however,the sub- systems composing the two clusters can be different,i.e.,the individual dynamical system in one cluster can differ from that in the other *** synchronization within each cluster is possible only if each node from one cluster receives the same input from nodes in other *** this case,the stability condition of one-cluster synchronization is known to contain two terms:the first accounts for the contribution of the inner-cluster coupling structure while the second is simply an extra linear term,which can be deduced by the'same-input'*** the connection graph stability method,the authors obtain an upper bound of input strength for one cluster if the first account is known,by which the synchronizability of cluster can be *** different clusters,there are different upper bound of input strength by virtue of different dynamics and the corresponding cluster ***,two illustrative examples are presented and the numerical simulations coincide with the theoretical analysis.

关键词： Cluster synchronization complex dynamical network connection graph stability.