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Mechanistic investigation on Ag-Cu_(2)O in electrocatalytic CO_(2) to CH_(4) by in situ/operando spectroscopic and theoretical analysis

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Journal of Energy Chemistry 2024年第1期88卷 521-531,I0012页

作者： Min Sun Luxiao Zhang Fuli Tian Jiaxin Li yanqiu Lei Heng Zhang Lifeng Han Zhihua Guo Yonghui gao Fenrong Liu Yan Wang Luhui Wang Shanghong Zeng School of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021Inner MongoliaChina Key Laboratory of Medicinal and Edible Plants Resources of Hainan Province Hainan Vocational University of Science and TechnologyHaikou 571126HainanChina State Key Laboratory of Baiyunobo Rare Earth Resource Research and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030Inner MongoliaChina Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control Zhejiang Ocean UniversityZhoushan 316022ZhejiangChina

Silver-copper electrocatalysts have demonstrated effectively catalytic performance in electroreduction CO_(2) toward CH_(4),yet a revealing insight into the reaction pathway and mechanism has remained ***,we construct chemically bonded Ag-Cu_(2)O boundaries,in which the complete reduction of Cu_(2)O to Cu has been strongly impeded owing to the presence of surface Ag *** interfacial confinement effect helps to maintain Cu^(+)sites at the Ag-Cu_(2)O *** in situ/operando spectroscopy and theoretical simulations,it is revealed that CO_(2) is enriched at the Ag-Cu_(2)O boundaries due to the enhanced physisorption and chemisorption to CO_(2),activating CO_(2) to form the stable intermediate^(*)*** boundaries between Ag shell and the Cu_(2)O mediate local^(*)CO coverage and promote^(*)CHO intermediate formation,consequently facilitating CO_(2)-to-CH_(4) *** work not only reveals the structure-activity relationships but also offers insights into the reaction mechanism on Ag-Cu catalysts for efficient electrocatalytic CO_(2) reduction.

关键词： Ag shell Interfacial confinement effect Cu~+ Local*CO coverage CO_(2)reduction

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气体标准物质标称值测量的不确定度评定

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上海计量测试 2024年第1期51卷 2-5,24页

作者：魏王慧姜阳刘旺旺董翊于瑞祥任逸尘高艳秋王德发上海市计量测试技术研究院中国计量科学研究院

介绍了气体标准物质标称值测量的应用领域和测量结果的重要性。通过对气体标准物质样品标称值的测量和标称值的结果评价,着重描述了气体标准物质标称值两种测量方式的不确定度评定方法。明确了气体标准物质标称值的量值溯源路径,有效提... 详细信息

介绍了气体标准物质标称值测量的应用领域和测量结果的重要性。通过对气体标准物质样品标称值的测量和标称值的结果评价,着重描述了气体标准物质标称值两种测量方式的不确定度评定方法。明确了气体标准物质标称值的量值溯源路径,有效提升了气体标准物质使用和测量过程中不确定度评定的规范性。

关键词：气体标准物质标称值不确定度评定

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High-throughput sequencing detection and ensartinib treatment of lung cancer harboring NTRK1 fusion

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Cancer Communications 2021年第2期41卷 192-196页

作者： Zhengbo Song Chunwei Xu Xingxiang Pu Youcai Zhu Wenxian Wang Xingliang Li yanqiu gao Wenliang Zhu Yunwei He Lin Wu Li Mao Li Chen Ming Chen Department of Medical Oncology Institute of Cancer and Basic MedicineChinese Academy of Sciences(Zhejiang Cancer Hospital)HangzhouZhejiang 310002P.R.China Department of Pathology Fujian Cancer HospitalFuzhouFujian 350014P.R.China Department of Thoracic Oncology Hunan Cancer HospitalChangshaHunan 410013P.R.China Thoracic Disease Diagnosis and Treatment Center Zhejiang Rongjun HospitalJiaxingZhejiang 314000P.R.China Tumor Molecular Laboratory Zhejiang Rongjun HospitalJiaxingZhejiang 314000P.R.China HeliTec Biotechnologies ShenzhenGuangdong 518000P.R.China Betta Pharmaceutical HangzhouZhejiang 311100P.R.China Department of Radiotherapy Institute of Cancer and Basic MedicineChinese Academy of Sciences(Zhejiang Cancer Hospital)HangzhouZhejiang 310022P.R.China

Dear Editor,Although fusion events involving neurotrophic receptor tyrosine kinase 1,2,and 3 genes(NTRK1,NTRK2,and NTRK3,encoding TRKA/B/C respectively)were found in diverse tumor types,only 0.1%-0.3%of lung cancer patients harbor an NTRK(and mostly NTRK1)fusion as the primary oncogenic event[1].Such low prevalence may be partially due to the limited availability of first-line assays for detecting rare fusion events[2].Immunohistochemistry is limited by sensitivity and variable tissue background,and fluorescence in-situ hybridization falls short of elucidating functional significance such as the identity of the partner or structure of the *** DNA next-generation sequencing(NGS)is suitable for mutation calling(single nucleotide variation[SNV]and insertion-or-deletion[indel]),and RNA NGS is particularly effective in detecting fusions[3],routinely performing these two assays together is *** a solution,we have developed a single NGS assay(PANO-Seq)for unified RNA/DNA target enrichment library preparation[4],which takes about 12 hours and $10 to prepare.

关键词： routine harbor treatment

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孕产妇死亡健康公平性分析

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人口研究 2007年第5期31卷 66-74页

作者：王斌高燕秋卫生部妇幼保健与社区卫生司妇女处北京大学医学部妇女与儿童青少年卫生学系

文章利用2000～2005年全国卫生统计年报中孕产妇死亡情况有关资料,计算了以孕产妇死亡率为基础的一系列健康公平性指标,分析了2000～2005年间我国孕产妇死亡的健康公平性。研究结果从人群归因危险度百分比、集中指数、集中曲线等指标反... 详细信息

文章利用2000～2005年全国卫生统计年报中孕产妇死亡情况有关资料,计算了以孕产妇死亡率为基础的一系列健康公平性指标,分析了2000～2005年间我国孕产妇死亡的健康公平性。研究结果从人群归因危险度百分比、集中指数、集中曲线等指标反映出在我国孕产妇死亡存在分布的不均衡。2000～2005年我国孕产妇死亡在地区间及省际的差距没有明显变化,即不公平现象6年间没有得到改善。

关键词：健康公平性孕产妇死亡

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层间颗粒增韧HT3/QY8911的损伤阻抗和损伤容限

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复合材料学报 2006年第1期23卷 167-172页

作者：高峰矫桂琼高艳秋宁荣昌卢智先西北工业大学工程力学系西安710072 北京航空制造工程研究所北京100024 西北工业大学化学工程系西安710072

采用热塑性颗粒对双马基体复合材料层合板HT3/QY8911进行层间增韧,制备未加入增韧颗粒的对比件和加入增韧颗粒的改性件。通过准静态压痕(QSI)实验和冲击后压缩实验,研究了层间增韧后HT3/QY8911的损伤阻抗和损伤容限特性。结果和分析表明... 详细信息

采用热塑性颗粒对双马基体复合材料层合板HT3/QY8911进行层间增韧,制备未加入增韧颗粒的对比件和加入增韧颗粒的改性件。通过准静态压痕(QSI)实验和冲击后压缩实验,研究了层间增韧后HT3/QY8911的损伤阻抗和损伤容限特性。结果和分析表明,改性件在静压痕力下具有较高的分层起始载荷,或在相同载荷水平下具有较小的损伤面积。提出从分层起始点载荷大小和载荷下降程度两方面来衡量试件对准静压痕力的响应。在相同的静压痕力或单位厚度冲击能量下,层间增韧后的HT3/QY8911具有较深的凹坑,表明塑性变形较大的层间区域以凹坑为代价换取了较小的损伤面积,具有较高的损伤阻抗。在冲击后压缩面积相差不大的情况下,层间增韧件的冲击后压缩强度和压缩破坏应变显著增加。

关键词： HT3/QY8911 层间颗粒增韧损伤阻抗损伤容限准静态压痕力

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集合资料同化方法的理论框架及其在海洋资料同化的研究展望

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海洋学报 2016年第3期38卷 1-14页

作者：沈浙奇唐佑民高艳秋国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室浙江杭州310012 北大不列颠哥伦比亚大学环境科学及工程系

在海洋动力系统的数值模拟中,海洋资料同化是一种能够有效融合多源海洋观测资料和数值模式的方法。它不仅可以显著地提高数值模拟的效果,构造海洋再分析资料场,还能有效减少海洋和气候预报时模式初始条件的不确定性。因此,海洋资料同化... 详细信息

在海洋动力系统的数值模拟中,海洋资料同化是一种能够有效融合多源海洋观测资料和数值模式的方法。它不仅可以显著地提高数值模拟的效果,构造海洋再分析资料场,还能有效减少海洋和气候预报时模式初始条件的不确定性。因此,海洋资料同化对于海洋研究和业务化应用具有非常重要的意义。资料同化方法的研究一直是大气、海洋科学的热门课题之一。其中,集合卡尔曼滤波器(EnKF)是一种有效的资料同化方法,自提出以来经过了20多年的发展和改进,已经在海洋资料同化中得到了广泛的研究和应用。近年来,随着动力模式的不断发展和计算能力的提高,粒子滤波器由于不受模型线性和误差高斯分布假设的约束,也逐渐成为了当前资料同化方法研究的热点。本文分析和总结了目前关于集合卡尔曼滤波器和粒子滤波器的一些最新理论研究结果,在贝叶斯滤波理论的框架下讨论了这两类算法的关联和区别,以及各自在资料同化实践中的优势和不足。在此基础上,我们探讨了粒子滤波器应用于海洋模式资料同化的主要困难和目前可行的一些解决方法,展望了集合资料同化方法研究的新趋势,为集合资料同化方法的进一步发展和应用提供理论基础。

关键词：资料同化集合卡尔曼滤波器粒子滤波器非高斯噪声贝叶斯滤波

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Record-high efficiency perovskite LEDs achieved by accelerating radiative recombination

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Science China Materials 2024年第9期67卷 3039-3040页

作者： Feng gao Department of Physics Chemistry and BiologyLinköping UniversityLinköping58183Sweden

Light-emitting diodes(LEDs)have revolutionized the lighting and displays due to their superior energy *** increasing demand for more efficient and brighter thin-film LEDs in flat-panel displays and solid-state lighting applications has driven extensive research into perovskite materials,which show great promise for high brightness and efficiency.

关键词： lighting radiative high

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Stress tensor determination by modified hydraulic tests on pre-existing fractures:Method and stress constraints

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1637-1648页

作者： Guiyun gao Chenghu Wang Ke gao National Institute of Natural Hazards Ministry of Emergency Management of ChinaBeijing100085China Beijing Engineering Research Center of Earthquake Observation Beijing100085China Key Laboratory of Compound and Chained Natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing100085China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen518055China

The hydraulic testing of pre-existing fractures(HTPF)is one of the most promising in situ stress measurement methods,particularly for three-dimensional stress tensor ***,the stress tensor determination based on the HTPF method requires at least six tests or a minimum of 14-15 tests(under different conditions)for reliable *** this study,we modified the HTPF method by considering the shear stress on each pre-existing fracture,which increased the number of equations for the stress tensor determination and decreased the number of tests *** shear stresses were attributed to different fractures by random sampling;therefore,the stress tensors were obtained by searching for the optimal solution using the least squares criterion based on the Monte Carlo ***,we constrained the stress tensor based on the tensile strength criterion,compressive strength criterion,and vertical stress *** inverted stress tensors were presented and analyzed based on the tensorial nature of the stress using the Euclidean mean stress *** stress-measurement campaigns in Weifang(Shandong Province,China)and Mercantour road tunnel(France)were implemented to highlight the validity and efficiency of the modified HTPF(M-HTPF)*** results showed that the M-HTPF method can be applied for stress tensor inversion using only three to four tests on pre-existing fractures,neglecting the stress *** inversion results were confined to relatively small distribution dispersions and were significantly reliable and stable due to the shear stresses on the fractures and the stress constraints *** M-HTPF method is highly feasible and efficient for complete stress tensor determination in a single borehole.

关键词： Stress tensor Hydraulic tests on pre-existing fractures Mean stress Stress constraint Hydraulic fracturing

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Thermal and mechanical behavior of casting copper alloy wheel during wheel and belt continuous casting process

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China Foundry 2024年第1期21卷 82-90页

作者： Kun gao Yan Peng School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina

To investigate the thermal and mechanical behavior of casting wheel,a two-dimensional thermoelastic-plastic finite element model was used to predict the temperature,stress and distortion distribution of the casting wheel during the wheel and belt continuous casting *** effects of grinding thickness and casting speed on the thermal and mechanical behaviors of the center of the hot face of the casting wheel were discussed in *** each rotation,the casting wheel passes through four different spray *** results show that the temperature distribution of the casting wheel in different spray zones is similar,the temperature of the hot face is the highest and the temperature reaches the peak in the spray zoneⅢ.The stress and distortion depend on the temperature distribution,and the maximum stress and distortion of the hot face are 358.2 MPa and 1.82 mm,*** temperature at the center of the hot face decreases with increasing grinding thickness and increases with increasing casting speed.

关键词： casting wheel finite element model grinding thickness casting speed hot face spray zones

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Numerical simulation of fluid flow and free surface fluctuations during wheel and belt casting process

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Journal of Iron and Steel Research International 2024年第5期31卷 1117-1126页

作者： Kun gao Yan Peng National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityQinhuangdao066004HebeiChina

The unstable fluid flow and severe free surface fluctuations in the wheel and belt caster can affect the quality of the cast *** lower level height tends to entrap inclusions in the molten *** the other hand,the higher level height makes the production process more dangerous due to the overflow of high temperature fluid from the mold.A computational model of the molten metal pouring process was *** transient fluid flow and free surface fluctuations behavior were calculated using the three-dimensional large eddy simulation model and the volume of fluid *** results show that the flow velocity of the main jet gradually decreases under the influence of the low kinetic energy fluid in the *** is an obvious oscillation in the tail of the jet,while the flow field is asymmetric in *** jet is closer to the inside radius side due to the Coanda effect,and there is a recirculation zone on the inside radius and the outside radius respectively,according to the 10 s time-averaged *** with the industrial observation and simulation results,the shape of the free surface is a wave that varies with *** addition,the free surface height is lowest and the flow velocity is highest in the region near the jet.

关键词： Fluid flow Free surface Wheel and belt caster Large eddy simulation Volume of fluid method

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