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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin Tang Hongsheng Jiang Zhengliang Lin xuan wang Wenliang wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOT:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

Resolving the developmental mechanisms of cardiac microthrombosis of SARS-CoV-2 based on single-cell transcriptome analysis

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Science China Life Sciences 2025年第1期68卷 103-115页

作者： Xizi Luo Nan Zhang Yuntao Liu Beibei Du xuan wang Tianxu Zhao Bingqiang Liu Shishun Zhao Jiazhang Qiu Guoqing wang State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Basic MedicineJilin University State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases Key Laboratory for Zoonosis Research of the Ministry of EducationCollege of Veterinary MedicineJilin University College of Mathematics Jilin University Bioinformatic Lab School of MathematicsShandong University Department of Cardiology China-Japan Union HospitalJilin University

The coronavirus disease 2019（COVID-19） outbreak caused by the severe acute respiratory syndrome coronavirus-2（SARS-CoV-2） developed into a global health emergency. Systemic microthrombus caused by SARS-CoV-2 infection is a common complication in patients with COVID-19. Cardiac microthrombosis as a complication of SARS-CoV-2 infection is the primary cause of cardiac injury and death in patietns with severe COVID-19. In this study, we performed single-cell sequencing analysis of the right ventricular free wall tissue from healthy donors,patients who died during the hypercoagulable period of characteristic coagulation abnormality（CAC）, and patients who died during the fibrinolytic period of CAC. We collected 61,187 cells enriched in 24 immune cell subsets and 13 cardiac-resident cell subsets. We found that in the course of SARS-CoV-2 infected heart microthrombus, MYO1EhighRASGEF1Bhighmonocyte-derived macrophages promoted hyperactivation of the immune system and initiated the extrinsic coagulation pathway by activating chemokines CCL3, CCL5. This series of events is the main cause of cardiac microthrombi following SARS-CoV-2 infection. In a SARS-CoV-2 infected heart microthrombus, excessive immune activation is accompanied by an increase in cellular iron content, which in turn promotes oxidative stress and intensifies intercellular competition. This induces cells to alter their metabolic environment, resulting in increased sugar uptake via the glycosaminoglycan synthesis pathway. In addition, high levels of reactive oxygen species generated by elevated iron levels promote increased endogenous malondialdehyde synthesis in a subpopulation of cardiac endothelial cells. This exacerbates endothelial cell dysfunction and exacerbates the coagulopathy process.

关键词： SARS-CoV-2 cardiac microthrombosis immune hyperactivation cell competition

一种缓释型ε-PL PA6复合材料的制备及其抗菌性能

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石油炼制与化工 2025年第1期56卷 40-48页

作者：王璇李伟李泽阳刘伟中石化石油化工科学研究院有限公司北京100083

以尼龙6(PA6)和聚赖氨酸(ε-PL)为原料,采用溶液共混方法制备了一系列不同ε-PL含量的ε-PL PA6复合材料,并利用扫描电镜、热重分析、差示扫描量热仪以及X射线衍射等方法对ε-PL PA6复合材料结构与性能进行了系统研究。结果表明:当ε-P... 详细信息

以尼龙6(PA6)和聚赖氨酸(ε-PL)为原料,采用溶液共混方法制备了一系列不同ε-PL含量的ε-PL PA6复合材料,并利用扫描电镜、热重分析、差示扫描量热仪以及X射线衍射等方法对ε-PL PA6复合材料结构与性能进行了系统研究。结果表明:当ε-PL质量分数为15%时,ε-PL在PA6中分散最均匀;ε-PL PA6两种材料复合对PA6晶型无影响,但其结晶温度升高、熔点降低;压片型ε-PL PA6复合材料样品中的ε-PL能够在水中持续缓慢释放,缓释过程符合Logistic模型;ε-PL质量分数为10%~20%的ε-PL PA6复合材料表现出良好的溶出抗菌性和表面抗菌性,对大肠杆菌和金黄色葡萄球菌的表面抗菌率均大于99.99%,是兼具表面抗菌和缓释抗菌功能的新型高分子复合抗菌材料。

关键词：尼龙6 聚赖氨酸缓释抗菌复合材料

DWI和DCE联合PSA检测对前列腺癌诊断价值研究

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罕少疾病杂志 2025年第1期32卷 113-115页

作者：鲁果果王轩轩马爱珍河南科技大学第一附属医院影像中心河南洛阳471000

目的分析、探究DWI、DCE联合PSA检测在前列腺癌临床诊断中的应用价值。方法选取我院20216至20232月期间收治的80例前列腺癌患者为研究对象并设置为观察组,同时选取同期来我院接受诊疗的85例前列腺增生(BHP)患者为对照组,对患者临床资料... 详细信息

目的分析、探究DWI、DCE联合PSA检测在前列腺癌临床诊断中的应用价值。方法选取我院20216至20232月期间收治的80例前列腺癌患者为研究对象并设置为观察组,同时选取同期来我院接受诊疗的85例前列腺增生(BHP)患者为对照组,对患者临床资料进行回顾性分析。两组患者均以病理诊断结果为“金标准”,为两组患者实施常规MRI检查、DCE-MRI检查、DWI检查及血清PSA检测,对比分析不同检测方法在临床诊疗工作的作用与价值。结.果80例前列腺癌患者中,34例患者属于是中央区癌、46例患者属于外周带癌。对照组与观察组在时间信.号强度.曲线类型的分布上存在统计学差异(P<005);根据DWI影像结果提示,前列腺癌病灶信号普遍都为明显高信号,且ADC.数值偏.低,平均ADC值为(069±012)×10^(-3)mm^(2)/s;前列腺增.生增生结节则以稍高信号为主,少部分则提示为高信号,ADC值有所降低,平均ADC值为(104±020)×10^(-3)mm^(2)/s,两组在ADC值上存在统计学差异(P<005)。以DWI+D CE.+PSA联合诊断方式诊断前列腺癌的准确度、灵敏度、特异度、阳性预测值、阴性预测值最高,与其他各项诊断方式比较,差异均有统计学意义(P<005)。结论DWI、DCE在鉴别前列腺癌与前列腺增生症时具备了一定的临床价值的,联合PSA对前列腺癌的诊断效果显著,有助于指导临床治疗方案的合理选择。

关键词： DWI DCE PSA 前列腺癌

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Incompressible Limit of the Compressible Q-tensor System of Liquid Crystals

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Acta Mathematicae Applicatae Sinica 2023年第1期39卷 179-201页

作者： Yi-xuan wang University of Pittsburgh PA 15260USA

We study the connection between the compressible Navier-Stokes equations coupled by the Qtensor equation for liquid crystals with the incompressible system in the periodic case, when the Mach number is low. To be more specific, the convergence of the weak solutions of the compressible nematic liquid crystal model to the incompressible one is proved as the Mach number approaches zero, and we also obtain the similar results in the stochastic setting when the equations are driven by a stochastic force. Our approach is based on the uniform estimates of the weak solutions and the martingale solutions, then we justify the limits using various compactness criteria.

关键词： compressible liquid crystal system Q-tensor weak solutions martingale solution stochastic compactness Mach number incompressible limit

Free vibration analysis of functionally graded material beams based on Levinson beam theory

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Applied Mathematics and Mechanics(English Edition) 2016年第7期37卷 861-878页

作者： xuan wang Shirong LI School of Hydraulic Energy and Power Engineering Yangzhou University School of Civil Science and Engineering Yangzhou University

Free vibration response of functionally graded material （FGM） beams is studied based on the Levinson beam theory （LBT）. Equations of motion of an FGM beam are derived by directly integrating the stress-form equations of elasticity along the beam depth with the inertial resultant forces related to the included coupling and higherorder shear strain. Assuming harmonic response, governing equations of the free vibration of the FGM beam are reduced to a standard system of second-order ordinary differential equations associated with boundary conditions in terms of shape functions related to axial and transverse displacements and the rotational angle. By a shooting method to solve the two-point boundary value problem of the three coupled ordinary differential equations, free vibration response of thick FGM beams is obtained numerically. Particularly, for a beam with simply supported edges, the natural frequency of an FGM Levinson beam is analytically derived in terms of the natural frequency of a corresponding homogenous Euler-Bernoulli beam. As the material properties are assumed to vary through the depth according to the power-law functions, the numerical results of frequencies are presented to examine the effects of the material gradient parameter, the length-to-depth ratio, and the boundary conditions on the vibration response.

关键词： functionally graded material (FGM) beam Levinson beam theory (LBT),free vibration shooting method natural frequency

CLASSICAL AND HOMOGENIZED EXPRESSIONS FOR BUCKLING SOLUTIONS OF FUNCTIONALLY GRADED MATERIAL LEVINSON BEAMS

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Acta Mechanica Solida Sinica 2015年第5期28卷 592-604页

作者： Shirong Li xuan wang Zeqing Wan Department of Civil Engineering Yangzhou University

The relationship between the critical buckling loads of functionally graded material （FGM） Levinson beams （LBs） and those of the corresponding homogeneous Euler-Bernoulli beams （HEBBs） is investigated. Properties of the beam are assumed to vary continuously in the depth direction. The governing equations of the FGM beam are derived based on the Levinson beam theory, in which a quadratic variation of the transverse shear strain through the depth is included. By eliminating the axial displacement as well as the rotational angle in the governing equations, an ordinary differential equation in terms of the deflection of the FGM LBs is derived, the form of which is the same as that of HEBBs except for the definition of the load parameter. By solving the eigenvalue problem of ordinary differential equations under different boundary conditions clamped （C）, simply-supported （S）, roller （R） and free （F） edges combined, a uniform analytical formulation of buckling loads of FGM LBs with S-S, C-C, C-F, C-R and S-R edges is presented for those of HEBBs with the same boundary conditions. For the C-S beam the above-mentioned equation does not hold. Instead, a transcendental equation is derived to find the critical buckling load for the FGM LB which is similar to that for HEBB with the same ends. The significance of this work lies in that the solution of the critical buckling load of a FGM LB can be reduced to that of the HEBB and calculation of three constants whose values only depend upon the through- the-depth gradient of the material properties and the geometry of the beam. So, a homogeneous and classical expression for the buckling solution of FGM LBs is accomplished.

关键词： FCM beam Levinson beam theory buckling critical load Euler-Bernoulli beam

Ultrafast electron diffraction

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Chinese Physics B 2018年第7期27卷 72-80页

作者： xuan wang Yutong Li Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Collaborative Innovation Center of IFZSA（CICIFSA） Shanghai Jiao Tong UniversityShanghai 200240China

Ultrafast electron diffraction （UED） technique has proven to be an innovative tool for providing new insights in lattice dynamics with unprecedented temporal and spatial sensitivities. In this article, we give a brief introduction of this technique using the proposed UED station in the Synergetic Extreme Condition User Facility （SECUF） as a prototype. We briefly discussed UED＇s functionality, working principle, design consideration, and main components. We also briefly reviewed several pioneer works with UED to study structure-function correlations in several research areas. With these efforts, we endeavor to raise the awareness of this tool among those researchers, who may not yet have realized the emerging opportunities offered by this technique.

关键词： ultrafast phenomena lattice dynamics ultrafast electron diffraction

A New Online Dynamic Testing Method for Nonlinear Distortion of Broadcast Transmitter

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Chinese Journal of Electronics 2020年第2期29卷 385-390页

作者： LI Shanshan ZHOU Jian wang xuan School of Information and Communication Engineering Communication University of China

The traditional method for measuring the parameters of the transmitter is that the tester measures the parameters according to the test standard and records the test results manually in the case of non-work time. It has some shortcomings, such as low efficiency, inconvenient data storage and higher requirements for testers. In view of the shortcomings, an automatic online method of measuring harmonic distortion of transmitter is *** method calculates parameter values by collecting transmitter data in real time. It is based on the histogram algorithm. According to the cumulative distribution function, discrete distribution of transmitter input and output signal amplitude values are obtained, and then the least squares algorithm is applied to the nonlinear polynomial fitting of discrete values. The feasibility of the method is verified by experimental simulation, and the residual value and test accuracy of different test methods are given.

关键词： Histogram Least square Nonlinear fitting Gauss-Newton iteration Digital measurement

Optimized Dispatching Method for Flexibility Improvement of AC-MTDC Distribution Systems Considering Aggregated Electric Vehicles

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Journal of Modern Power Systems and Clean Energy 2023年第6期11卷 1857-1867页

作者： Xingyue Jiang Shouxiang wang Qianyu Zhao xuan wang Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China IEEE

With the increasing use of renewable resources and electric vehicles(EVs), the variability and uncertainty in their nature put forward a high requirement for flexibility in AC distribution system incorporating voltage source converter(VSC) based multi-terminal direct current(MTDC) grids. In order to improve the capability of distribution systems to cope with uncertainty, the flexibility enhancement of AC-MTDC distribution systems considering aggregated EVs is studied. Firstly, the charging and discharging model of one EV is proposed considering the users' demand difference and traveling needs. Based on this, a vehicle-to-grid(V2G) control strategy for aggregated EVs to participate in the flexibility promotion of distribution systems is provided. After that, an optimal flexible dispatching method is proposed to improve the flexibility of power systems through cooperation of VSCs, controllable distributed generations(CDGs), aggregated EVs, and energy storage systems(ESSs). Finally, a case study of an AC-MTDC distribution system is carried out. Simulation results show that the proposed dispatching method is capable of effectively enhancing the system flexibility, reducing renewable power curtailment, decreasing load abandonment, and cutting down system cost.

关键词： Multi-terminal direct current(MTDC) distribution system aggregated electric vehicle(EV) flexibility optimized dispatching