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Scattering of Water Waves by Dual Symmetric Inclined Floating Porous Barriers Using the DBEM

China Ocean Engineering 2024年第1期38卷 156-168页

作者： WANG Li-xian deng Yan-wen YE Yang-sha deng Zheng-zhi Key Laboratory of High Performance Ship Technology(Wuhan University of Technology) Ministry of EducationWuhan 430063China School of Naval Architecture Ocean and Energy Power EngineeringWuhan University of TechnologyWuhan 430063China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China Institute of Port Coastal and Offshore EngineeringZhejiang UniversityZhoushan 316021China

The scattering of normally incident water waves by two surface-piercing inclined perforated barriers in water with a uniform finite depth is investigated within the framework of linear water wave *** that thin barriers are zero-thickness,a novel numerical method involving the the coupling of the dual boundary element method(DBEM)with damping layers is *** order to effectively damp out the reflected waves,two damping layers,instead of pseudoboundaries are implemented near the two side boundaries of the computational ***,the modified linearized free surface boundary conditions are formulated and used for solving both the ordinary boundary integral equation as well as the hypersingular boundary integral equation for degenerate *** newly developed numerical method is validated against analytical methods using the matched eigenfunction expansion method for the special case of two vertical barriers or the inclined angle to the vertical being *** influence of the length of the two damping layers has been ***,these findings are also validated against previous results for several *** validation,the numerical results for the reflection coefficient,transmission coefficient and dissipation coefficient are obtained by varying the inclination angle and porosity-effect *** effects of both the inclination angle and the porosity on the amplitudes of wave forces acting on both the front and rear barriers are also *** is found that the effect of the inclination angle mainly shifts the location of the extremal values of the reflection and the transmission ***,a moderate value of the porosity-parameter is quite effective at dissipating wave energy and mitigating the wave loads on dual barriers.

关键词： dual boundary element method inclined perforated floating breakwater reflection coefficient transmission coefficient damping layer

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Transition metals for stabilizing lithium metal anode:advances and perspectives

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Tungsten 2024年第1期6卷 212-229页

作者： Si-Cheng Miao Ye Jia Zhi-wen deng Yan deng Ruo-Xuan Chen Xue-Mei Zhang Chang-Haoyue Xu Meng Yao wen-Long Cai Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064China

As the capacity of lithium-ion batteries gradually reaches its limit,the high-capacity characteristics of lithium metal batteries(LMBs)make them one of the most promising electrochemical energy storage devices ***,uncontrolled lithium dendrite growth can cause poor cell performance and severe safety issues,seriously slowing down the commercialization of *** metals(TMs)are lithiophilic materials that effectively stabilize lithium metal anode(LMA)and inhibit dendrite ***,the growth of lithium dendrites and the performance of TMs in stabilizing lithium metals are comprehensively discussed in this ***,we elucidated the formation mechanisms of lithium dendrite,and we put forward several strategies to suppress lithium dendrite formation based on the understanding of these ***,the application of TMs and their compounds to stabilize LMA and their corresponding mechanisms are comprehensively ***,further research perspectives of TMs in stabilizing LMA are emphasized in detail.

关键词： Transition metals Lithium metal batteries Lithium dendrite Solid electrolyte interphase Formation mechanism

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Artificial neural network-based method for discriminating Compton scattering events in high-purity germaniumγ-ray spectrometer

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Nuclear Science and Techniques 2024年第2期35卷 64-84页

作者： Chun-Di Fan Guo-Qiang Zeng Hao-wen deng Lei Yan Jian Yang Chuan-Hao Hu Song Qing Yang Hou College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China

To detect radioactive substances with low activity levels,an anticoincidence detector and a high-purity germanium(HPGe)detector are typically used simultaneously to suppress Compton scattering background,thereby resulting in an extremely low detection limit and improving the measurement ***,the complex and expensive hardware required does not facilitate the application or promotion of this ***,a method is proposed in this study to discriminate the digital waveform of pulse signals output using an HPGe detector,whereby Compton scattering background is suppressed and a low minimum detectable activity(MDA)is achieved without using an expensive and complex anticoincidence detector and *** electric-field-strength and energy-deposition distributions of the detector are simulated to determine the relationship between pulse shape and energy-deposition location,as well as the characteristics of energy-deposition distributions for fulland partial-energy deposition *** relationship is used to develop a pulse-shape-discrimination algorithm based on an artificial neural network for pulse-feature *** accurately determine the relationship between the deposited energy of gamma(γ)rays in the detector and the deposition location,we extract four shape parameters from the pulse signals output by the *** learning is used to input the four shape parameters into the ***,the pulse signals are identified and classified to discriminate between partial-and full-energy deposition *** partial-energy deposition events are removed to suppress Compton *** proposed method effectively decreases the MDA of an HPGeγ-energy dispersive *** results show that the Compton suppression factors for energy spectra obtained from measurements on ^(152)Eu,^(137)Cs,and ^(60)Co radioactive sources are 1.13(344 keV),1.11(662 keV),and 1.08(1332 keV),respectively,and that the corresponding MDAs are 1.4%,5.

关键词： High-purity germaniumγ-ray spectrometer Pulse-shape discrimination Compton scattering Artificial neural network Minimum detectable activity

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Efficacy of radiofrequency ablation combined with sorafenib for treating liver cancer complicated with portal hypertension and prognostic factors

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World Journal of Gastroenterology 2024年第11期30卷 1533-1544页

作者： Li-Min Yang Hong-Juan Wang Shan-Lin Li Guan-Hua Gan wen-wen deng Yong-Sheng Chang Lian-Feng Zhang Department of Gastroenterology The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052Henan ProvinceChina Department of Gastroenterology Zhoukou Central Hospital of Henan ProvinceZhoukou 466000Henan ProvinceChina Department of Gastroenterology The First Affiliated Hospital of Xinxiang Medical CollegeXinxiang 453000Henan ProvinceChina

BACKGROUND Patients with liver cancer complicated by portal hypertension present complex challenges in *** To evaluate the efficacy of radiofrequency ablation in combination with sorafenib for improving liver function and its impact on the prognosis of patients with this *** Data from 100 patients with liver cancer complicated with portal hypertension from May 2014 to March 2019 were analyzed and divided into a study group(n=50)and a control group(n=50)according to the treatment *** research group received radiofrequency ablation(RFA)in combination with sorafenib,and the control group only received *** short-term efficacy of both the research and control groups was *** function and portal hypertension were compared before and after ***-fetoprotein(AFP),glypican-3(GPC-3),and AFP-L3 levels were compared between the two groups prior to and after *** occurrence of adverse reactions in both groups was *** 3-year survival rate was compared between the two *** data were compared between the survival and non-surviving *** identify the independent risk factors for poor prognosis in patients with liver cancer complicated by portal hypertension,multivariate logistic regression analysis was *** When comparing the two groups,the research group's total effective rate(82.00%)was significantly greater than that of the control group(56.00%;P<0.05).Following treatment,alanine aminotransferase and aspartate aminotransferase levels increased,and portal vein pressure decreased in both *** degree of improvement for every index was substantially greater in the research group than in the control group(P<0.05).Following treatment,the AFP,GPC-3,and AFP-L3 levels in both groups decreased,with the research group having significantly lower levels than the control group(P<0.05).The incidence of diarrhea,rash,nausea and vomiting,and fatigue in the research group was significantly great

关键词： Radiofrequency ablation Sorafenib Liver cancer Portal hypertension Efficacy Prognosis analysis

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Bridging buried interface enable 24.67%-efficiency doctor-bladed perovskite solar cells in ambient condition

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Nano Research 2024年第9期17卷 8068-8076页

作者： Jianhui Chang Erming Feng Xiangxiang Feng Hengyue Li Yang Ding Caoyu Long Siyuan Lu Haixia Zhu wen deng Jiayan Shi Yingguo Yang Si Xiao Yongbo Yuan Junliang Yang Hunan Key Laboratory for Super-microstructure and Ultrafast Process School of PhysicsCentral South UniversityChangsha 410083China Hunan Key Laboratory of Nanophotonics and Devices School of PhysicsCentral South UniversityChangsha 410083China Textile and Fashion Collage Hunan Institute of EngineeringXiangtan 411101China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

Scalable deposition of high-efficiency perovskite solar cells(PSCs)is critical to accelerating their commercial ***,a significant number of defects are distributed at the buried interface of perovskite film fabricated by scalable deposition,exhibiting much negative influence on the efficiency and stability of ***,2-(N-morpholino)ethanesulfonic acid potassium salt(MESK)is incorporated as the bridging layer between the tin oxide(SnO_(2))electron transport layer(ETL)and the perovskite film deposited via scalable two-step doctor *** experiment and simulation results demonstrate that MESK can passivate the trap states of Sn suspension bonds,thereby enhancing the charge extraction and transport of the SnO_(2)***,the strong interaction with uncoordinated Pb ions can modulate the crystal growth and crystallographic orientation of perovskite film and passivate buried *** employing MESK interface bridging,PSCs fabricated via scalable doctor blading in ambient condition achieve a power conversion efficiency(PCE)of 24.67%,which is one of the highest PCEs for doctor-bladed PSCs,and PSC modules with an active area of 11.35 cm^(2)achieve a PCE of 19.45%.Furthermore,PSCs exhibit excellent long-term stability,and the unpackaged target device with a storage of 1680 h in ambient condition(25℃and humidity of 30%relative humidity(RH))can maintain more than 90%of the initial *** research provides a strategy for constructing a high-performance interface bridge between SnO_(2)ETL and perovskite film,and achieving efficient and stable large-area PSCs and modules fabricated via scalable doctor-blading process in ambient condition.

关键词： perovskite solar cells doctor blading buried interface defect passivation orientation regulation

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文生视频模型Sora的时间性结构分析——对生成式人工智能的现象学思考

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编辑之友 2024年第6期 46-52页

作者：邓志文湖北科技学院人文与传媒学院湖北咸宁437100

近日,OpenAI推出了代表了目前文生视频最高水平的模型Sora,成为生成式人工智能发展史上的里程碑。然而,Sora还是存在着一些技术上的缺陷和不足。从时间现象学角度看,Sora外在时间结构“阵容”残缺,只有客观时间,没有主观时间和内在时间... 详细信息

近日,OpenAI推出了代表了目前文生视频最高水平的模型Sora,成为生成式人工智能发展史上的里程碑。然而,Sora还是存在着一些技术上的缺陷和不足。从时间现象学角度看,Sora外在时间结构“阵容”残缺,只有客观时间,没有主观时间和内在时间意识,导致其无法描述人类的心理时间,不能解释事件的因果关系和建构复杂有意义的事件及情节。此外,滞留和前摄的缺席,导致其无法连接动作和结果;缺少内在时间性动态生成结构的介入,Sora亦难以展现随着时间推移而发生的事件。因此,从技术层面增加数据模型的意向性实践和提升意向性设计的算量、算法,完善内外两个时间性结构,成为提升Sora现实表现的关键。

关键词：文生视频 Sora 时间性结构生成式人工智能现象学滞留与前摄

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考虑纵向残余顶推力的盾构隧道纵向抗弯刚度解析算法

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中国公路学报 2024年第1期37卷 165-174页

作者：黄大维姜浩罗文俊邓文武华东交通大学轨道交通基础设施性能监测与保障国家重点实验室江西南昌330013 华东交通大学铁路环境振动与噪声教育部工程研究中心江西南昌330013 华东交通大学江西省防灾减灾及应急管理重点实验室江西南昌330013 中铁第六勘察设计院集团有限公司天津300308

纵向抗弯刚度是盾构隧道的基本力学参数,其取值的合理性直接关系到盾构隧道纵向响应分析结果。针对盾构隧道纵向抗弯刚度取值未考虑环缝接头拉伸刚度与纵向残余顶推力的问题,提出了一种考虑纵向残余顶推力的盾构隧道纵向抗弯刚度解析算... 详细信息

纵向抗弯刚度是盾构隧道的基本力学参数,其取值的合理性直接关系到盾构隧道纵向响应分析结果。针对盾构隧道纵向抗弯刚度取值未考虑环缝接头拉伸刚度与纵向残余顶推力的问题,提出了一种考虑纵向残余顶推力的盾构隧道纵向抗弯刚度解析算法。首先,通过理论分析将盾构隧道的纵向挠曲变形考虑为均质圆管的纵向挠曲变形与管片环环缝张开导致的纵向挠曲变形两部分,并由此得到了盾构隧道纵向抗弯刚度解析算法,其结果与管片材料的弹性模量、隧道外径、管片幅宽、环缝接头数量、环缝接头拉伸刚度和纵向残余顶推力等因素有关。然后,设计了可考虑环缝接头拉伸刚度与纵向残余顶推力的缩尺模型盾构隧道,并开展了纵向抗弯刚度模型试验,分别对模型隧道的纵向挠曲变形量与环缝张开变形量进行了测试。最后,通过试验数据对纵向抗弯刚度解析算法进行了验证。结果表明:模型盾构隧道实测纵向抗弯刚度与理论算法求解得到的纵向抗弯刚度基本一致;当不施加纵向残余顶推力时,随着加载的增加,盾构隧道纵向抗弯刚度总体变化不大,而当施加纵向残余顶推力时,对于相同纵向残余顶推力,盾构隧道纵向抗弯刚度随着加载的增加而减小,并逐渐趋于稳定;在盾构隧道纵向响应分析中,需要减小纵向残余顶推力引起的纵向挠曲变形,以作为盾构隧道的安全储备。

关键词：隧道工程盾构隧道模型试验纵向抗弯刚度纵向残余顶推力解析算法

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叙事疗法为基础的循证心理干预对高中生自我同一性水平的提升效果

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中国临床心理学杂志 2024年第2期32卷 469-474页

作者：梁爽杨文登广州大学教育学院广州510006

目的:检验叙事疗法为基础的循证心理干预对高中生自我同一性水平的提升效果。方法:将45名同一性尚未达成的高一学生随机分为3组,每组15人,分别进行为期8周的循证心理干预、常规干预及空白干预。以自我同一性地位量表和同一性危机量表进... 详细信息

目的:检验叙事疗法为基础的循证心理干预对高中生自我同一性水平的提升效果。方法:将45名同一性尚未达成的高一学生随机分为3组,每组15人,分别进行为期8周的循证心理干预、常规干预及空白干预。以自我同一性地位量表和同一性危机量表进行结局评估,以心理咨询效果评估量表(OQ-45.2)进行过程评估。结果:结局评估显示,相比前测,后测时循证干预组的自我同一性地位显著提高,同一性危机显著降低(P<0.001),2个月后的随访显示效果仍然维持;常规干预组的自我同一性地位无显著提高,同一性危机显著降低(P<0.01),随访显示效果不再维持;空白组的自我同一性地位和同一性危机变化均不显著。过程评估显示,循证干预组OQ-45.2总分及人际关系维度分数显著降低(P<0.01),常规干预组差异不显著。结论:叙事疗法为基础的循证心理干预能显著提升高中生的自我同一性水平,且在随访中仍维持显著效果。

关键词：自我同一性同一性危机循证心理干预叙事疗法高中生

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Relationship between Phenotypic Changes of Dendritic Cell Subsets and the Onset of Plateau Phase during Intermittent Interferon Therapy in Patients with CHB

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Biomedical and Environmental Sciences 2024年第3期37卷 303-314页

作者： YANG Liu WANG Shi Yu JIANG Ting Ting deng wen CHANG Min WU Shu Ling CAO Wei Hua LU Yao SHEN Ge LIU Ru Yu GAO Yuan Jiao XU Meng Jiao HU Lei Ping ZHANG Lu XIE Yao LI Ming Hui Department of Hepatology Division 2 Beijing Ditan HospitalCapital Medical UniversityBeijing 100015China Center for Infectious Diseases Second Affiliated Hospital of Air Force Medical UniversityXi'an 710038ShaanxiChina Department of Hepatology Division 2 Peking University Ditan Teaching HospitalBeijing 100015China

Objective This study aimed to evaluate whether the onset of the plateau phase of slow hepatitis B surface antigen decline in patients with chronic hepatitis B treated with intermittent interferon therapy is related to the frequency of dendritic cell subsets and expression of the costimulatory molecules CD40,CD80,CD83,and *** This was a cross-sectional study in which patients were divided into a natural history group(namely NH group),a long-term oral nucleoside analogs treatment group(namely NA group),and a plateau-arriving group(namely P group).The percentage of plasmacytoid dendritic cell and myeloid dendritic cell subsets in peripheral blood lymphocytes and monocytes and the mean fluorescence intensity of their surface costimulatory molecules were detected using a flow *** In total,143 patients were enrolled(NH group,n=49;NA group,n=47;P group,n=47).The results demonstrated that CD141/CD1c double negative myeloid dendritic cell(DNmDC)/lymphocytes and monocytes(%)in P group(0.041[0.024,0.069])was significantly lower than that in NH group(0.270[0.135,0.407])and NA group(0.273[0.150,0.443]),and CD86 mean fluorescence intensity of DNmDCs in P group(1832.0[1484.0,2793.0])was significantly lower than that in NH group(4316.0[2958.0,5169.0])and NA group(3299.0[2534.0,4371.0]),Adjusted P all<*** Reduced DNmDCs and impaired maturation may be associated with the onset of the plateau phase during intermittent interferon therapy in patients with chronic hepatitis B.

关键词： CHB Dendritic Cells Intermittent Interferon Therapy Plateau Phase

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基于像素对比学习的图像超分辨率算法

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自动化学报 2024年第1期50卷 181-193页

作者：周登文刘子涵刘玉铠华北电力大学控制与计算机工程学院北京102206

目前,深度卷积神经网络(Convolutional neural network,CNN)已主导了单图像超分辨率(Single image superresolution,SISR)技术的研究,并取得了很大进展.但是,SISR仍是一个开放性问题,重建的超分辨率(Super-resolution,SR)图像往往会出现模糊、纹理细节丢失和失真等问题.提出一个新的逐像素对比损失,在一个局部区域中,使SR图像的像素尽可能靠近对应的原高分辨率(High-resolution,HR)图像的像素,并远离局部区域中的其他像素,可改进SR图像的保真度和视觉质量.提出一个组合对比损失的渐进残差特征融合网络(Progressive residual feature fusion network,PRFFN).主要贡献有:1)提出一个通用的基于对比学习的逐像素损失函数,能够改进SR图像的保真度和视觉质量;2)提出一个轻量的多尺度残差通道注意力块(Multi-scale residual channel attention block,MRCAB),可以更好地提取和利用多尺度特征信息;3)提出一个空间注意力融合块(Spatial attention fuse block,SAFB),可以更好地利用邻近空间特征的相关性.实验结果表明,PRFFN显著优于其他代表性方法.

关键词：图像超分辨率卷积神经网络对比学习注意力机制

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