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Epstein-Barr virus-associated monomorphic post-transplant lymphoproliferative disorder after pediatric kidney transplantation: A case report

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World Journal of Clinical Cases 2021年第2期9卷 469-475页

作者： zhen wang Yang Xu jie Zhao Ying-Xin Fu Department of Kidney Transplantation Tianjin First Central HospitalTianjin 300192China

BACKGROUND Post-transplant lymphoproliferative disease(PTLD)is the most common malignant tumor that occurs after kidney transplantation in children,and is associated with Epstein-Barr virus(EBV).CASE SUMMARY We report a case of PTLD that occurred in a 17-year-old female patient at 5 mo *** first symptom was abdominal pain accompanied by fever,nausea,and ***-associated monomorphic PTLD with multiple abdominal nodules was diagnosed by pathology,clinical manifestations,imaging results,and the presence of *** successful treatment with rituximab,the abdominal nodules in the spleen and liver *** Early pathological biopsy to confirm the diagnosis is critical to treatment and *** immunosuppression and rituximab therapy are effective methods for treating PTLD,but need to be initiated as early as possible.

关键词： Post-transplant lymphoproliferative disorder Epstein-Barr virus Kidney transplantation Case report Biopsy Calcineurin inhibitors

Uniform Truncation Error for Shannon Sampling Expansion from Local Averages

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Acta Mathematicae Applicatae Sinica 2015年第1期31卷 121-130页

作者： Zhan-jie SONG Pei-xin YE Ping wang Shou-zhen ZENG School of Science and SKL of HESS Tianjin University School of Mathematics and LPMC Nankai University Department of Mathematics School of Science Tianjin University Institute of Mathmatics Zhejiang Wanli University

Let B^pΩ,1≤Р≤∞,be the set of all bounded functions in L^p（R）which can be extended to entire unctions of exponential typeΩ. The unitbrm bounds for truncation error of Shannon sampling expansion fromlocal averages are obtained for functions f∈BpΩwith the decay condition f（t）≤A/t^δ,t≠0,where A and δare positive constants. Furthermore we also establish similar results for non-bandlimit functions in Besov classes with the same decay condition as above.

关键词： Shannon sampling Theorem local averages truncation error modulus of continuity

Mechanistic Study on the Dominant Promotion Effect of Al-/Ti-/Zr-modifications over the VOx/SiO2 UHMWPE Catalysts

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Chinese Journal of Polymer Science 2019年第10期37卷 995-1004,I0004页

作者： Yu-Long Jin Lin Liu Yu-jie wang zhen Liu Bo-Ping Liu College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China School of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

Recently, we reported the first VOx/SiO2 ethylene polymerization catalyst for making Cl-free UHMWPE, and found the dominant promotion effects of Al-/Ti-/Zr-modifications over this catalyst system(Macromol. Chem. Phys. 2017, 218, 1600443). In this work, density functional theory is applied to investigate the underlying mechanism of this remarkable promotion effect of Al-/Ti-/Zrmodifications on a molecular and atomic level. The cluster model with V(Ⅲ) is found to be the most possible active site due to its lowest overall energy barrier for monomer insertion, though the process of C2H4 coordination and the subsequent formation of transition state are most energy favored for V(Ⅱ) species. By modifying one of or both V―O―Si in the active model with V―O―M(M = Al, Ti, or Zr),the energy barrier for the binding of the upcoming C2H4 gets lower(particularly for Al-and Zr-modified catalysts), and the transition state also becomes more stable. Generally, the insertion process of C2H4 gets easier after support Al-/Ti-/Zr-modifications. This dominant promotion effect is partially ascribed to the more enriched positive charge distribution on or nearby the V center, and the narrower energy gap between the LUMO of model catalysts and the HOMO of C2H4 for these modified catalysts also contributes much. In addition, the decreased steric hindrance around the V center should be taken into account for the modified models as well. Furthermore, the Br?nsted acidity of the catalysts is investigated by introducing a pendent hydroxyl group to the model catalysts, which has a close contact with the V center. Similar promotion effect of support modification by Al, Ti, and Zr could still be observed.

关键词： Density functional theory Vanadium-oxides Ethylene polymerization Support modification Mechanism

A zero-sum hybrid stochastic differential game with impulse controls

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Science China(Information Sciences) 2024年第11期67卷 285-299页

作者： Siyu LV zhen WU jie XIONG School of Mathematics Southeast University School of Mathematics Shandong University Department of Mathematics and SUSTech International Center for Mathematics Southern University of Science and Technology

In this paper, we study a zero-sum stochastic differential game with the following salient features:(i) the system state is dictated by a hybrid diffusion,(ii) both players use impulse controls, and(iii) the game takes place on an infinite time horizon. First, the dynamic programming principle for the problem is ***, the lower and upper value functions of the game are characterized as the unique viscosity solution of the associated Hamilton-Jacobi-Bellman-Isaacs(HJBI) equation, which turns out to be a coupled system of variational inequalities with bilateral obstacles. Moreover, a verification theorem as a sufficient condition to identify a Nash equilibrium is established. The Nash equilibrium strategies for the two players, indicating when and how it is optimal to intervene, are given in terms of the obstacle part of the HJBI equation.

关键词： stochastic differential game Markov chain impulse control HJBI equation viscosity solution verification theorem

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Green Synthesis of Mechanical Robust Superhydrophobic CNT@PU Coatings with High Flexibility for Extensive Applications

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Journal of Bionic Engineering 2021年第1期18卷 40-54页

作者： zhengwei Wu Yizhou Shen jie Tao zhenfeng Jia Haifeng Chen Jiawei Jiang zhen wang College of Materials Science and Technology Nanjing University of Aeronauics and AstronauticsNanjing 210016China School of Engineering Huzhou UniversityHuzhou Centre HospitalHuzhou 313000China

Superhydrophobic coatings with high flexibility and mechanical durability can well address many practical application *** this end,we proposed and fabricated a kind of bio-based superhydrophobic(multi-walled carbon nanotubes)CNT@PU(polyurethane)*** was demonstrated that the CNT@PU coatings with 64%soft segment content possessed the preferable bonding strength(5B)with metal *** multi-walled carbon nanotubes,as additive materials,were used to construct the microscopic structures of the coating surfaces,which made polyurethane surface superhydrophobic(water contact angle being 156.9°,and water sliding angle being 4.3°).Furthermore,the high bonding strength between CNT and coating matrix led to robust mechanical durability of supertiydrophobic CNT@PU coatings,and the coatings remained superhydrophobicity after 10 cycles of abrasion under 100 g load ***,the superhydrophobic coatings could well resist 5 cycles of tape-peeling action,and presented outstanding *** supernydrophobic CNT@PU coatings with high flexibility and mechanical durability could be applied to various substrates suggesting their big potential in future real-world application.

关键词： bio-based PU superhydrophobic coatings high flexibility mechanical durability

Full-parameter constrained parsimonious subspace identification with steady-state information for DC–DC converters

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Control Theory and Technology 2024年第2期22卷 173-183页

作者： jie Hou zhen Yang Taifu Li Huiming wang Jincheng Jiang Xiaolei Chen College of Automation Chongqing University of Posts and TelecommunicationsChongqing400065China School of Electrical and Information Engineering Chongqing University of Science and TechnologyChongqing401331China

A full-parameter constrained parsimonious subspace identification method that incorporates the steady-state a priori infor-mation of the system is proposed to model the DC-DC converters.A parsimonious model with fewer parameters is used to represent the system,and then an optimal weighted methods is used to estimate the system parameters matrices by taking into account both dynamical data and steady-state *** with traditional data-driven methods for DC-DC convert-ers,the subspace-based method can simultaneously estimate model structure and parameter with appropriate computational ***,compared with the traditional full-parameter constrained subspace approach,the proposed algorithm can accurately estimate the system parameters with a smaller *** experimental results on a DC-DC synchronous buck converter verify the effectiveness and superiority of the proposed method.

关键词： System identification Constrained identification DC-DC converters Subspace identification

EBSD parameter assessment and constitutive models of crept HR3C austenitic steel

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Journal of Iron and Steel Research International 2023年第4期30卷 772-781页

作者： jie Zhang zheng-fei Hu zhen Zhang Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials School of Materials Science and EngineeringTongji UniversityShanghai 201804China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167JiangsuChina

Creep damage and evolution of HR3C steel at 650℃ were investigated using electron backscatter diffraction(EBSD),and EBSD-based parameter assessments were *** analyses show that the grain size is almost unchanged and no obvious texture formed after creep at different creep *** lowest proportion of low Σ coincidence site lattice grain boundaries under 150 MPa implies that the primary twin structures are preserved under the low stress level,while some twin structures evolved into general grain boundaries at the high creep *** main damage features of microcracks and cavities can be seen along the grain boundaries:the former emerged at higher stress levels,while the latter appeared at the lower stress level,and both were shown under medium *** contrast shows that the most severe creep damage is present at 170 *** implies that the creep mechanism differs distinctly under different stress levels,and the transition point is around 170 *** average misorientation is better to describe the local plastic deformation related to the strain distribution while grain reference orientation deviation describes the inhomogeneous strain *** lifetime prediction models including the isothermal method,Larson-Miller parameter method and Monkman–Grant relation were evaluated by the experimental data and literature data,and they are valid for predicting creep behavior.

关键词： Austenitic heat-resistant steel Creep damage Electron backscatter diffraction Creep constitutive model Creep lifetime prediction

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基于特征融合和模板更新的孪生网络跟踪算法

电光与控制 2025年第1期32卷 41-47,85页

作者：吴国瑞王峰李杰太原理工大学电子信息与光学工程学院山西晋中030000 太原理工大学电气与动力工程学院太原030000

针对现有孪生网络跟踪算法仅使用主干网络最后一层的特征进行相似度匹配,以及缺少有效模板更新策略的问题,提出基于多尺度特征融合和自适应模板更新的孪生网络跟踪算法。首先,结合深度过参数化卷积设计非填充单元,提取更深层的前景特征... 详细信息

针对现有孪生网络跟踪算法仅使用主干网络最后一层的特征进行相似度匹配,以及缺少有效模板更新策略的问题,提出基于多尺度特征融合和自适应模板更新的孪生网络跟踪算法。首先,结合深度过参数化卷积设计非填充单元,提取更深层的前景特征和语义背景;然后,设计新的全局-局部特征融合模块,充分聚合浅、中层特征的全局和局部信息,捕获丰富的浅层外观特征和中层过渡特征;最后,采用自适应模板更新机制在线更新模板。为验证算法的有效性,在公开数据集上对所提算法进行详尽评估,实验结果显示,所提算法在OTB2015和VOT2018数据集上的精确度分别达到0.878和0.588,GOT10K数据集上平均重叠率达到0.526,优于其他主流算法。

关键词：目标跟踪孪生网络计算机应用多层特征融合模板更新

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Enriched environment elevates expression of growth associated protein-43 in the substantia nigra of SAMP8 mice

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Neural Regeneration Research 2018年第11期13卷 1988-1994页

作者： zhen-Yun Yuan jie Yang Xiao-Wei Ma Yan-Yong wang Ming-Wei wang The First Hospital of Hebei Medical University Brain Aging and Cognitive Neuroscience Laboratory of Hebei Province Shijiazhuang Hebei ProvinceChina

An enriched environment protects dopaminergic neurons from 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine（MPTP）-induced neuronal injury, but the underlying mechanism for this is not clear. Growth associated protein-43（GAP-43） is closely associated with neurite outgrowth and axon regeneration during neural development. We speculate that an enriched environment can reduce damage to dopaminergic neurons by affecting the expression of GAP-43. This study is designed to test this hypothesis. Three-month-old female senescence-accelerated mouse prone 8（SAMP8） mice were housed for 3 months in an enriched environment or a standard environment. These mice were then subcutaneously injected in the abdomen with 14 mg/kg MPTP four times at 2-hour intervals. Morris water maze testing demonstrated that learning and memory abilities were better in the enriched environment group than in the standard environment group. Reverse-transcription polymerase chain reaction, immunohistochemistry and western blot assays showed that m RNA and protein levels of GAP-43 in the substantia nigra were higher after MPTP application in the enriched environment group compared with the standard environment group. These findings indicate that an enriched environment can increase GAP-43 expression in SAMP8 mice. The upregulation of GAP-43 may be a mechanism by which an enriched environment protects against MPTP-induced neuronal damage.

关键词： nerve regeneration Parkinson's disease neural plasticity senescence-accelerated mouse prone 8 growth associated protein-43 substantia nigra learning and memory neural regeneration