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Three-dimensionally ordered macroporous(3DOM) structure promoted the activity and H_(2)O poisoning resistance of Ce Mn/3DOM-TiO_(2) catalyst in NH_(3)-SCR

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Journal of Rare Earths 2024年第3期42卷 523-533,I0004页

作者： Yaqin Hu Shipeng Ding Chenchen Tan Peng Wu Guobo Li Sheng Wang Hongqiang yang Yaping Zhang Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China State Power Environmental Protection Research Institute Nanjing210031China

NH_(3)-SCR is an effective mean of NOxremoval in the non-electric industry, however, the high activation temperature and poor H_(2)O resistance of SCR catalysts posed a barrier to its application. In this work, a series of three-dimensionally ordered macroporous(3DOM) catalysts were synthesized via a colloidal crystal template(CCT) method, and various characterizations were carried out to explore the physicochemical property of catalysts. The experiment results reveal that Ce_(0.2)Mn_(0.2)/3DOM-TiO_(2) catalyst presents the excellent low-temperature catalytic activity of nearly 100% at 100℃. Furthermore, the enhanced H_(2)O resistance is achieved, certified by the unaffected NO remove at 150℃ in the participation of 15 vol% H_(2)O. The characterizations results exhibit that the improved dispersion of the active component and enhanced redox ability are conducive to the low-temperature catalytic activity. N_(2) adsorption and desorption experiments indicate that catalyst with 3DOM support possesses a larger pore diameter and specific surface area, which may weaken the condensation of H_(2)O in the microporosity of catalysts and improved the H_(2)O resistance of the catalyst. In situ DRIFTS results manifest that Ce_(0.2)Mn_(0.2)/3DOM-TiO_(2) catalyst could not only absorb more NH_(3) and generate more surface-active sites, but inhibit the competitive adsorption between H_(2)O and SCR reactants.

关键词： 3DOM material NH_(3)-SCR H_(2)O resistance Low-temperature Cerium Rare earths

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Remnant Paleoproterozoic Subduction or Lithospheric Drip Initiation at the Yilgarn Craton Margin: Constraints from P-wave Tomography

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Acta Geologica Sinica(English Edition) 2024年第S1期 72-74页

作者： XU Xiaobing WANG Kun yang Dinghui ZHAO Liang YUAN Huaiyu Department of Mathematical Sciences Tsinghua University Institute of Geophysics China Earthquake Administration State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences ARC Centre of Excellence for Core to Crust Fluid Systems Department of Earth and Environmental SciencesMacquarie University Centre for Exploration Targeting University of Western Australia

The Paleoproterozoic was a critical time in whether modern-style plate tectonics had become globally dominant(e.g., Wan et al., 2020). The Capricorn Orogen witnessed the assembly of the Pilbara and Yilgarn Cratons and an exotic microcontinent, the Glenburgh Terrane, to form the West Australia Craton(WAC) through two collisional orogenic events, the 2215–2145 Ma Ophthalmian and 2005–1950 Ma Glenburgh Orogenies(Johnson et al., 2013; Fig. 1). Compared to other Proterozoic orogenic belts in Australia, the Capricorn Orogen preserves ‘complete' opposing continental margin successions, together with intervening arc fragments associated with oceanic closure and foreland basins associated with collisional loading(Cawood et al., 2009).

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Effect of viral hepatitis on type 2 diabetes:A Mendelian randomization study

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World Journal of Diabetes 2024年第2期15卷 220-231页

作者： Yun-Feng Yu Gang Hu Ke-Ke Tong Xin-Yu yang Jing-Yi Wu Rong Yu The First Hospital of Hunan University of Chinese Medicine Changsha 410007Hunan ProvinceChina The Hospital of Hunan University of Traditional Chinese Medicine Changde 415213Hunan ProvinceChina College of Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina The Third Hospital of Zhejiang Chinese Medical University Hangzhou 310005Zhejiang ProvinceChina

BACKGROUND The effects of viral hepatitis(VH)on type 2 diabetes(T2D)remain *** To analyze the causal correlation between different types of VH and T2D using Mendelian randomization(MR).METHODS Single nucleotide polymorphisms of VH,chronic hepatitis B(CHB),chronic hepatitis C(CHC)and T2D were obtained from the BioBank Japan Project,European Bioinformatics Institute,and *** variance weighted,MREgger,and weighted median were used to test exposure-outcome *** MR-Egger intercept analysis and Cochran’s Q test were used to assess horizontal pleiotropy and heterogeneity,***-one-out sensitivity analysis was used to evaluate the robustness of the MR analysis *** The MR analysis showed no significant causal relationship between VH and T2D in Europeans[odds ratio(OR)=1.028;95%confidence interval(CI):0.995-1.062,P=0.101].There was a negative causal association between CHB and T2D among East Asians(OR=0.949;95%CI:0.931-0.968,P0.05).Sensitivity analysis showed that the results were *** Among East Asians,CHB is associated with a reduced T2D risk,but this association is limited by HBV load and *** VH among Europeans and CHC among East Asians are not associated with the risk of T2D,focusing on blood glucose in patients with CHC is still relevant for the early detection of T2D induced by CHCmediated pathways of hepatic steatosis,liver fibrosis,and cirrhosis.

关键词： Viral hepatitis Chronic hepatitis B Chronic hepatitis C Type 2 diabetes Mendelian randomization

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进口集装箱堆场箱位分配与场桥调度协同优化

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吉林大学学报（工学版） 2024年第5期54卷 1347-1354页

作者：朱瑾刘洋上海海事大学物流科学与工程研究院上海201306

针对场桥作业均衡和效率问题,设计了分时段平衡策略(TPBS),考虑了场桥之间作业安全距离和堆场容量的约束,建立了一个混合整数规划模型,以最大限度地减少双场桥的作业量方差和作业总时间,为了求解建立的模型并分析算例,开发了模拟退火遗... 详细信息

针对场桥作业均衡和效率问题,设计了分时段平衡策略(TPBS),考虑了场桥之间作业安全距离和堆场容量的约束,建立了一个混合整数规划模型,以最大限度地减少双场桥的作业量方差和作业总时间,为了求解建立的模型并分析算例,开发了模拟退火遗传算法(SAGA)。通过不同算法对比实验和3种平衡策略在集装箱数量为80~500个时的对比实验及分析,实验结果表明:SAGA对比于GA和SA的目标值分别平均降低7.32%、20.66%,分时段平衡策略可以均衡场桥作业任务量,缩短集装箱装卸任务的完成时间,有效地提高了堆场空间的利用率,并有助于提高场桥的整体作业效率。

关键词：分时段平衡策略箱位分配场桥调度混合整数规划模型模拟退火遗传算法

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Strong Earthquake Model of North China Craton: A Case of 2023 Mw 5.5 Earthquake in Pingyuan County, Shandong Province, China

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Acta Geologica Sinica(English Edition) 2024年第S1期 39-40页

作者： LIU Guanshen LU Renqi HE Dengfa FANG Lihua ZHANG yang Institute of Geology China Earthquake Administration College of Energy Resource China University of Geosciences Institute of Geophysics China Earthquake Administration Henan Earthquake Agency

North China is one of the high-risk areas for destructive strong earthquakes in mainland China, with a history of numerous significant seismic events. On August 6, 2023, an Mw5.5 earthquake struck Pingyuan County, Dezhou City, in Shandong Province, China. This earthquake was the largest in the eastern North China Craton(NCC) since the Tangshan earthquake of 1976. Due to the absence of surface ruptures, the fault responsible for the Pingyuan Mw5.5 earthquake remains unclear. To reveal the subsurface geological structure near the earthquake epicenter, this study utilized highresolution two-dimensional seismic reflection profiles to interpret pre-existing faults.

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圆弧形蜂窝夹芯板在低速冲击下的动力响应研究

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振动与冲击 2024年第5期43卷 214-222,238页

作者：余阳付涛昆明理工大学机电工程学院昆明650500

为了研究具有负泊松比特性的圆弧形蜂窝夹芯板的动力响应,基于哈密顿原理和一阶剪切变形理论推导了圆弧形蜂窝夹芯板的运动方程,同时建立两自由度的质量-弹簧模型来获得蜂窝夹芯板与冲击器之间的接触力,利用Navier法和Duhamel积分对圆... 详细信息

为了研究具有负泊松比特性的圆弧形蜂窝夹芯板的动力响应,基于哈密顿原理和一阶剪切变形理论推导了圆弧形蜂窝夹芯板的运动方程,同时建立两自由度的质量-弹簧模型来获得蜂窝夹芯板与冲击器之间的接触力,利用Navier法和Duhamel积分对圆弧形夹芯板的运动方程解析求解。在理论模型有效性验证方面,低速冲击下蜂窝夹芯板中心最大横向位移的理论模型计算结果与ABAQUS有限元仿真结果的最大相对误差为4.9%,同时求得理论模型与已发表文献计算出的接触力最大相对误差为8%,验证了理论模型的有效性。通过理论模型研究了蜂窝胞元参数变化对蜂窝夹芯板动力响应的影响,研究结果表明:随着球形冲击器的冲击速度递增,圆弧形蜂窝夹芯板中心最大横向位移也呈现出递增的规律;圆弧形蜂窝夹芯板的抗冲击特性随着蜂窝胞元半径或角度的增大而减小,当蜂窝胞元半径从5 mm增加至7 mm时,蜂窝夹芯板的抗冲击特性减少40.28%;当蜂窝胞元角度从30°增加至60°时,蜂窝夹芯板的抗冲击特性减少83.64%;蜂窝夹芯板的抗冲击特性随着蜂窝胞元壁厚的增大而增大,当蜂窝胞元壁厚从1 mm增加至3 mm时,蜂窝夹芯板的抗冲击特性提升59.51%。通过减小胞元角度和半径,增加胞元壁厚可以提升圆弧形蜂窝夹芯板的抗冲击特性。

关键词：低速冲击蜂窝夹芯板一阶剪切变形理论质量-弹簧模型 ABAQUS有限元仿真

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融合双注意力机制和动态图卷积的点云语义分割

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北京航空航天大学学报 2024年第10期50卷 2984-2994页

作者：杨军张琛兰州交通大学电子与信息工程学院兰州730070 兰州交通大学测绘与地理信息学院兰州730070

针对现有基于深度学习的三维点云语义分割算法通常在提取局部特征时忽略邻域点间深层次语义信息,聚合局部邻域特征时忽略其他邻域特征中有用信息的问题,提出融合双注意力机制和动态图卷积神经网络(DGCNN)的三维点云语义分割算法。通过... 详细信息

针对现有基于深度学习的三维点云语义分割算法通常在提取局部特征时忽略邻域点间深层次语义信息,聚合局部邻域特征时忽略其他邻域特征中有用信息的问题,提出融合双注意力机制和动态图卷积神经网络(DGCNN)的三维点云语义分割算法。通过动态图卷积操作构造边缘特征,并将中心点与邻域点的相对距离输入到核点卷积操作得到增强后的边缘特征,进一步加强中心点与邻域点之间的联系;引入空间注意力模块以建立邻域点之间的依赖关系,将特征相似点相互关联,从而在局部邻域内提取到更深层次的上下文信息,丰富邻域点的几何特征;在聚合局部邻域特征时引入通道注意力模块,通过给不同通道赋予不同的权值以达到增强有用通道同时抑制无用通道的目的,从而提高语义分割的准确率。在S3DIS数据集和SemanticKITTI数据集上的实验结果表明:所提算法的语义分割精度分别达到了66.0%和59.4%,与其他经典的网络模型相比,取得了更好的点云分割效果。

关键词：三维点云语义分割深度学习注意力机制动态图卷积

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Recent Advances in Fault Diagnosis Techniques for Photovoltaic Systems:a Critical Review

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Protection and Control of Modern Power Systems 2024年第3期9卷 36-59页

作者： Bo yang Ruyi Zheng Yiming Han Jianxiang Huang Miwei Li Hongchun Shu Shi Su Zhengxun Guo the School of Electrical Engineering Kunming University of Science and TechnologyKunmingChina Kunming University of Science and Technology KunmingChina the School of Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming 650500China the Kunming Bureau of CSG EHV Transmission Company KunmingChina the Power Science Research Institute of Yunnan Power Grid Co. LtdKunmingChina

If a failure in the components of a photovoltaic(PV)system,such as PV module,controller,inverter,load,cable,*** undetected and uncorrected,it can seriously affect the efficiency,safety,and reliability of the entire PV power *** addition,fires can occur if specific faults,such as arc,ground,and line-to-line faults remain ***,PV system(PVS)fault diagnoses are crucial for PV power plant reliability,efficiency,and *** fault diagnosis methods and techniques for PVS components have been *** addition,with the development of PV devices,more advanced and intelligent diagnostic technologies are continuously being researched and ***,a systematic and thorough analysis,summary,and conclusion are still urgently ***,this paper introduces the types,causes,and impacts of PVS faults,and reviews and discusses the methods proposed in the literature for PVS fault diagnosis,and in particular,failures in PV *** attention is paid to the optimization direction of various fault diagnosis methods under different priorities,and their limitations,feasibility,complexity,and ***,challenges and suggestions are put forward for future research.

关键词： PVS monitoring system PV fault types PV diagnosis review.

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稀薄气体动理论中介观尺度数值模拟的加速方法

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国防科技大学学报 2024年第2期46卷 70-78页

作者：杨伟奇国防科技大学空天科学学院湖南长沙410073

针对滑移流、早期过渡流区域采用离散速度法(discrete velocity method,DVM)求解Boltzmann方程收敛速度极慢、计算资源消耗大的难题,提出全流场耦合介观/宏观方程加速方法。在介观层面基于有限差分的DVM求解Boltzmann方程,在宏观层面基... 详细信息

针对滑移流、早期过渡流区域采用离散速度法(discrete velocity method,DVM)求解Boltzmann方程收敛速度极慢、计算资源消耗大的难题,提出全流场耦合介观/宏观方程加速方法。在介观层面基于有限差分的DVM求解Boltzmann方程,在宏观层面基于有限体积的压力耦合方程组半隐式方法求解矩方程,充分利用纳维-斯托克斯-傅里叶/R26矩方程在低克努森数下的快速收敛特性,对介观方程进行加速。基于高阶Hermite多项式重构分布函数,完成宏观方程与介观方程之间的数据传输。仿真结果表明:全流场耦合介观/宏观方程的加速方法在滑移流、早期过渡流区域具有显著加速性能,最大降低了95.28%的计算时长;但对中、大克努森数流域,加速性能大幅度下降。

关键词：稀薄气体 Boltzmann方程离散速度法 R26矩方法加速方法

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Experience of humanistic nursing in hemodialysis nursing for patients with diabetic kidney disease

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World Journal of Diabetes 2024年第2期15卷 186-195页

作者： Xiao-Ying Chai Xiao-Yan Bao Ying Dai Xing-Xing Dai Yu Zhang Yu-Ling yang Department of Nephrology The Affiliated Hospital of Jiangnan UniversityWuxi 214000Jiangsu ProvinceChina Department of Hemodialysis The Affiliated Hospital of Jiangnan UniversityWuxi 214000Jiangsu ProvinceChina Department of Endocrinology The Affiliated Hospital of Jiangnan UniversityWuxi 214000Jiangsu ProvinceChina

BACKGROUND Diabetic kidney disease(DKD)is a prevalent complication of diabetes that often requires hemodialysis for *** the field of nursing,there is a growing recognition of the importance of humanistic care,which focuses on the holistic needs of patients,including their emotional,psychological,and social ***,the application of humanistic nursing in the context of hemodialysis for DKD patients remains relatively *** To explore the experience of humanistic nursing in hemodialysis nursing for DKD *** Ninety-six DKD patients treated with hemodialysis from March 2020 to June 2022 were included in the study and divided into the control cluster(48 cases)and the study cluster(48 cases)according to different nursing methods;the control cluster was given routine nursing and the study cluster was given humanized *** variances of negative emotion mark,blood glucose,renal function,the incidence of complications,life mark and nursing satisfaction before and after nur-sing were contrasted between the two *** No significant difference in negative emotion markers between the two clusters were observed before nursing(P>0.05),and the negative emotion markers of the two clusters decreased after *** Hamilton Anxiety Rating Scale and Hamilton Depression Rating Scale markers were lower in the study cluster than the control *** healing rate of patients in the study cluster was significantly higher than the control cluster(97.92%vs 85.42%,P0.05).However,after nursing,blood urea nitrogen and serum creatinine(SCr)levels in the study cluster were lower than those in the control cluster(P<0.05).The incidence rate of complications was significantly lower in the study group compared to the control cluster(6.25%vs 20.83%,P<0.05).There was no significant difference in the life markers between the two clusters be

关键词： Diabetic kidney disease Hemodialysis Humanistic nursing Incidence of complication Effect

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