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Journal of Energy Chemistry 2024年第4期91卷 36-49页

作者： Yifan Zhang Linsheng liu Yuxuan Li Xueqin mu Shichun mu Suli liu Zhihui Dai School of Chemistry and Molecular Engineering Nanjing Tech UniversityNanjing 211816JiangsuChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology InstitutionWuhan 430070HubeiChina School of Chemistry and Materials Science Nanjing Normal UniversityNanjing 210023JiangsuChina

Atomically dispersed catalysts exhibit significant influence on facilitating the sluggish oxygen reduction reaction(ORR)kinetics with high atom economy,owing to remarkable attributes including nearly 100%atomic utilization and exceptional catalytic ***,accurately controlling atomic physical properties including spin,charge,orbital,and lattice degrees of atomically dispersed catalysts can realize the optimized chemical properties including maximum atom utilization efficiency,homogenous active centers,and satisfactory catalytic performance,but remains ***,through physical and chemical insight,we review and systematically summarize the strategies to optimize atomically dispersed ORR catalysts including adjusting the atomic coordination environment,adjacent electronic orbital and site density,and the choice of dual-atom *** the emphasis is on the fundamental understanding of the correlation between the physical property and the catalytic behavior for atomically dispersed ***,an overview of the existing challenges and prospects to illustrate the current obstacles and potential opportunities for the advancement of atomically dispersed catalysts in the realm of electrocatalytic reactions is offered.

关键词： Atomically dispersed catalysts Coordination environment Electronic orbitals Inter-site distance effect Oxygen reduction reaction

Current understanding of mesenchymal stem cells in liver diseases

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World Journal of Stem Cells 2021年第9期13卷 1349-1359页

作者： mu-Chen Wu qing-Hua Meng Department of Medical Oncology You An HospitalCapital Medical UniversityBeijing 100069China

Liver diseases caused by various factors have become a significant threat to publichealth worldwide. Liver transplantation has been considered as the only effectivetreatment for end-stage liver diseases;however, it is limited by the shortage ofdonor organs, postoperative complications, long-term immunosuppression, andhigh cost of treatment. Thus, it is not available for all patients. Recently,mesenchymal stem cells (MSCs) transplantation has been extensively explored forrepairing hepatic injury in various liver diseases. MSCs are multipotent adultprogenitor cells originated from the embryonic mesoderm, and can be found inmesenchymal tissues including the bone marrow, umbilical cord blood, adiposetissue, liver, lung, and others. Although the precise mechanisms of MSC transplantationremain mysterious, MSCs have been demonstrated to be able toprevent the progression of liver injury and improve liver function. MSCs can selfrenewby dividing, migrating to injury sites and differentiating into multiple celltypes including hepatocytes. Additionally, MSCs have immune-modulatoryproperties and release paracrine soluble factors. Indeed, the safety and effectivenessof MSC therapy for liver diseases have been demonstrated in ***, pre-clinical and clinical trials are largely required to confirm its safetyand efficacy before large scale clinical application. In this review, we will explorethe molecular mechanisms underlying therapeutic effects of MSCs on liverdiseases. We also summarize clinical advances in MSC-based therapies.

关键词： Mesenchymal stem cell Liver disease Clinical trial Treatment Safety Efficacy

Excess capacity on compound phases of Li_(2)FeTiO_(4) composite cathode materials synthesized by hydrothermal reaction using optional titanium sources to boost battery performance

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Chinese Chemical Letters 2020年第12期31卷 3200-3204页

作者： liu Yang Shaohua Luo Yafeng Wang Yang Zhan qing Wang Yahui Zhang Xin liu Wenning mu Fei Teng School of Materials Science and Engineering Northeastern UniversityShenyang 110819China School of Resources and Materials Northeastern University ar QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei PYrovince Qinhuangdao 066004China Qinhuangdao Laboratory of Resources Cleaner Conversion and Efficient Utilization Qinhuangdao 066004China

Li_(2)FeTiO_(4) composites have been produced using commercial LiAC,FeCl_(2) and different titanium sources by hydrothermal synthesis(HS)at 175℃and subsequent annealing at 700℃.Impure phase TiO_(2),Fe_(2)O_(3) and FeTi0_(4) were detected out among the Li_(2)FeTiO_(4) composites with different titanium *** and nano-sized particles of Li2FeTiO4 were prepared from various titanium raw materials,with nano-sized particles predominating when titanium raw materials were layered hydrogen titanate nanowire(H2Ti3O7 NW,HTO-NW)and titanium oxide nanotubes(TiO_(2) NB).The Li_(2)FeTiO_(4) composites synthesized by HTO-NW shows a primary particle size of 50-200 nm of high crystallinity staggered with undissolved nanowire with a diameter size of about 100 *** samples using one-dimensio nal nanometer titanium oxide(TiO2 NB)as the raw material can get a super high initial discharge capacity of 367.8 mAh/g at the rate of C/10 and excellent cycling *** selection of raw materials and adopting multi-phase modification can be considered as an effective strategy to improve the electro-chemical properties of Li_(2)FeTiO_(4) composite cathode materials for the lithium secondary battery.

关键词： Li_(2)FeTiO_(4)nanocomposites Cathode materials Hydrothermal reaction Lithium ion battery Post-heat-treatment

multiplicative Functions Resembling the Mobius Function

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Acta Mathematica Sinica,English Series 2023年第12期39卷 2316-2328页

作者： qing Yang liu School of Mathematics Renmin University of ChinaBeijing 100872P.R.China Institute of Mathematics AMSSThe Chinese Academy of SciencesBeijing 100080P.R.China

A multiplicative function f is said to be resembling the Mobius function if f is supported on the square-free integers,and f(p)=±1 for each prime *** prove O-and Ω-results for the summatory function ∑_(n)≤x f(n)for a class of these f,and the point is that these O-results demonstrate cancellations better than the square-root *** is proved in particular that the summatory function is O(x^(1/3+ε))under the Riemann *** the other hand it is proved to be Ω(x^(1/4))*** is interesting to compare these with the corresponding results for the Mobius function.

关键词： Mobius function random multiplicative function zeta-function

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On λ-harmonic graphs

Applied Mathematics(A Journal of Chinese Universities) 2009年第2期24卷 245-252页

作者： liu mu-huo liu Bo-lian Dept. of Math. South China Agricultural Univ. Guangzhou 510642 China College of Math. Sci. South China Normal Univ. Guangzhou 510631 China

A λ harmonic graph G, a λ-Hgraph G for short, means that there exists a constant A such that the equality λd（ui） = ∑（vi,vj）∈E（G） d（vj） holds for all i = 1, 2,…, ｜V（G）｜, where d（vi） denotes the degree of vertex vi. In this paper, some harmonic properties of the complement and line graph are given, and some algebraic properties for the λ-Hgraphs are obtained.

关键词： harmonic graph regular graph line graph degree series

Conversion-type cathode materials for high energy density solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期 409-425页

作者： Yuhao Ma Shihong qing Hongyu liu Chuntao Ma Yuan Yu Chuang Yu Liping Wang School of Materials and Energy University of Electronic Science and Technology of China Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech University State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology

Solid-state lithium batteries （SSLBs） are regarded as an essential growth path in energy storage systems due to their excellent safety and high energy *** particular,SSLBs using conversion-type cathode materials have received widespread attention because of their high theoretical energy densities,low cost,and *** the great progress in research and development of SSLBs based on conversiontype cathodes,their practical applications still face challenges such as blocked ionic-electronic migration pathways,huge volume change,interfacial incompatibility,and expensive processing *** review focuses on the advantages and critical issues of coupling conversion-type cathodes with solid-state electrolytes （SSEs）,as well as state-of-the-art progress in various promising cathodes （e.g.,FeS2,CuS,FeF3,FeF2,and S） in ***,representative research on conversion-type solid-state full cells is discussed to offer enlightenment for their practical ***,the energy density exhibited by the S cathode stands out impressively,while sulfide SSEs and halide SSEs have demonstrated immense potential for coupling with conversion-type ***,perspectives on conversion-type cathodes are provided at the material,interface,composite electrode,and battery levels,with a view to accelerating the development of conversion-type cathodes for high-energy–density SSLBs.

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Reliable routing mechanism based on neighbor stability for MANET

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The Journal of China Universities of Posts and Telecommunications 2009年第3期16卷 33-39页

作者： WU Da-peng WU mu-qing ZHEN Yan Broadband Communication Networks Lab Beijing University of Posts and Telecommunications Beijing 100876 China

One critical issue for routing in mobile Ad-hoc networks （MANETs） is how to select a reliable path that can last longer because mobility may cause frequent breakdown in radio links. A novel routing mechanism based on link lifetime estimation is proposed in this article. In this mechanism, the node＇s received signal strength is obtained continuously by using Newton interpolation polynomial, and by method of middle value and interception, the reference points are selected to estimate the link lifetime. With the constraint of link lifetime and hop counts, the source nodes set up the route hop by hop. The simulations show that link lifetime can be predicted regardless of mobility pattern. Moreover, the route discovery times and packet drop ratio can be reduced by the proposed mechanism, and thus improving the performance of MANETs.

关键词： Ad-hoc networks routing protocol link lifetime received signal strength interpolation polynomial

Some Results on the Majorization Theorem of Connected Graphs

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Acta Mathematica Sinica,English Series 2012年第2期28卷 371-378页

作者： mu Huo liu Bo Lian liu Department of Applied Mathematics South China Agricultural UniversityGuangzhou 510642P.R.Ch.ina School of Mathematical Science South China Normal UniversityGuangzhou 510631P.R.China

Let π = （d1, d2,..., dn） and π＇ = （d＇1, d＇2,..., d＇n） be two non-increasing degree sequences.

关键词： Spectral radius Perron vector majorization

Degree series of the 3-harmonic graphs

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Applied Mathematics(A Journal of Chinese Universities) 2008年第4期23卷 481-489页

作者： liu mu-huo liu Bo-lian Department of Mathematics South China Agricultural University Guangzhou 510642 China School of Mathematical Sciences South China Normal University Guangzhou 510631 China

A λ harmonic graph G, a λ-Hgraph G for short, means that there exists a constant λ such that the equality λd（vi） = Σ（vi,vj）∈E（G） d（vj） holds for all i = 1, 2,..., ｜V（G）｜, where d（vi） denotes the degree of vertex vi. Let ni denote the number of vertices with degree i. This paper deals with the 3-Hgraphs and determines their degree series. Moreover, the 3-Hgraphs with bounded ni （1 ≤ i ≤ 7） are studied and some interesting results are obtained.

关键词： harmonic graph non-regular graph degree series

Synthesis and application of lignin-based copolymer LSAA on controlling non-point source pollution resulted from surface runoff

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Journal of Environmental Sciences 2008年第7期20卷 820-826页

作者： liu Chen WU Guangxia mu Huanzhen Research Center for Eco-Environmental Sciences Chinese Academic of SciencesBeijing 100085China

In this article,alkali lignin separated from paper pulp waste was grafted into a novel copolymer LSAA (a copolymer of lignin,starch, acrylamide,and acrylic acid).Its practical application effect and environmental safety were *** results of field simulation experiment indicated that the application of LSAA significantly affected the output of the runoff and *** runoff quantity was decreased by 16.67%-47.00%and the loads of total suspended solids (TSS),chemical oxygen demand (COD),total nit...

关键词： application copolymer a copolymer of lignin starch acrylamide and acrylic acid (LSAA) non-point source pollution (NPS) surface runoff