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6.X nm下一代极紫外多层膜技术研究进展

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中国激光 2024年第7期51卷 151-163页

作者：李笑然唐何涛赵娇玲李丰华上海大学微电子学院上海200072 中国科学院上海光学精密机械研究所薄膜光学实验室上海201800

集成电路的生产主要依靠光刻技术为主的工艺体系,采用波长为13.5 nm光源的极紫外光刻是当前最先进的商用规模量产光刻技术,为集成电路的发展带来前所未有的进步。根据瑞利判据,为进一步提高分辨率,以波长6.X nm为光源的下一代“超越极... 详细信息

集成电路的生产主要依靠光刻技术为主的工艺体系,采用波长为13.5 nm光源的极紫外光刻是当前最先进的商用规模量产光刻技术,为集成电路的发展带来前所未有的进步。根据瑞利判据,为进一步提高分辨率,以波长6.X nm为光源的下一代“超越极紫外”光刻成为研究热点。多层膜反射镜是极紫外光刻机光学系统中的关键器件,其反射率和寿命决定光刻机的曝光效率与成像质量。综述了6.X nm多层膜的研究进展,对近年来6.X nm波段的极紫外光源以及多层膜的设计、制备和表征等方面进行了介绍和分析。重点阐述了6.X nm多层膜的界面优化方法,并讨论了多层膜在工程应用中的老化和性能衰减等问题,对面向未来商业应用的方向做出了展望。旨在为我国从事先进光刻等相关研究工作的学者、工程师等提供重要参考。

关键词：先进光刻超越极紫外多层膜反射率界面工程

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三穗县平菇熟料高效栽培技术

长江蔬菜 2024年第13期 37-38页

作者：彭鹤陶三穗县农业农村局贵州黔东南556599

近年来,黔东南苗族侗族自治州三穗县政府大力推广农户在家开展平菇熟料栽培,目前全县很多农户已开始在家种植平菇,但农户技术不够成熟,鉴于此,针对平菇的生长特性和三穗县气候特点,结合家庭种植的技术需求,从栽培条件、发菌期管理、采... 详细信息

近年来,黔东南苗族侗族自治州三穗县政府大力推广农户在家开展平菇熟料栽培,目前全县很多农户已开始在家种植平菇,但农户技术不够成熟,鉴于此,针对平菇的生长特性和三穗县气候特点,结合家庭种植的技术需求,从栽培条件、发菌期管理、采收与贮存、杂菌与虫害防治等方面介绍平菇的栽培技术,为三穗县农户家庭种植平菇提供参考依据。

关键词：平菇熟料栽培

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Effects of Spinach Powder Fat-Soluble Extract on Proliferation of Human Gastric Adenocarcinoma Cells

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Biomedical and Environmental Sciences 1999年第4期12卷 247-252页

作者： hetao HUANGCHENG－YU 等 DepartmentofNutritionandFoodHygiene SchoolofPublicHealthWestChinaUniversityofMedicalSciences Departm

Four kinds of assays were used to study the effect of a fat-soluble extract of spinach powder (SPFE) on the proliferation of human gastric adenocareinoma cell line (SGC-7901) in *** studies included: (Ⅰ) cell growth assay, (Ⅱ) colony forming assay, (Ⅲ) MTT colorimetric assay, and (Ⅳ) 3H-TdR incorporation assay. The concentrations of SPFE expressed as the level of β-carotene in the medium were 2×10-8, 2×10-7 and 2×10-6 mol/L β-carotene in assays (Ⅰ)～(Ⅲ), but 4×10- 8, 4×10-7 and 4×10-6 mol/L β-caretene in assay (Ⅳ) respectively. The results indicated that SPFE inhibited the prolifendion and colony forming ability of SGC-7901 cells. And in MTT assay, SPFE inhibited the viability of SGC7901 cells, but no inhibitory effect of SPFE was observed on the viability of lymphocytes in peripheral blood of healthy people. Finally, in the 3H-TdR incorporation test, both SPFE and β-carotene showed significant inhibitory effects on DNA synthesis in SGC-7901 cells, but SPFE was more effective than β-carotene.

关键词： SGC Chen cell line Effects of Spinach Powder Fat-Soluble Extract on Proliferation of Human Gastric Adenocarcinoma Cells

Numerical simulation to determine the gas explosion risk in longwall goaf areas:A case study of Xutuan Colliery

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International Journal of Mining Science and Technology 2020年第6期30卷 875-882页

作者： Yunzhuo Li hetao Su Huaijun Ji Wuyi Cheng School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Deep Geodrilling Technology Ministry of Land and ResourcesChina University of Geosciences(Beijing)Beijing 100083China

Underground gassy longwall mining goafs may suffer potential gas explosions during the mining process because of the irregularity of gas emissions in the goaf and poor ventilation of the working face,which are risks difficult to *** this work,the 3235 working face of the Xutuan Colliery in Suzhou City,China,was researched as a case *** effects of air quantity and gas emission on the three-dimensional distribution of oxygen and methane concentration in the longwall goaf were *** on the revised Coward’s triangle and linear coupling region formula,the coupled methane-oxygen explosive hazard zones(CEHZs)were ***,a simple practical index was proposed to quantitatively determine the gas explosion risk in the longwall *** results showed that the CEHZs mainly focus on the intake side where the risk of gas explosion is *** CEHZ is reduced with increasing air ***,the higher the gas emission,the larger the CEHZ,which moves towards the intake side at low goaf heights and shifts to the deeper parts of the goaf at high *** addition,the risk of gas explosion is reduced as air quantities increase,but when gas emissions increase to a higher level(greater than 50 m3/min),the volume of the CEHZ does not decrease with the increase of air quantity,and the risk of gas explosion no longer shows a linear downward *** study is of significance as it seeks to reduce gas explosion accidents and improve mine production safety.

关键词： Longwall goaf Gas explosion Air quantity Gas emission Hazard zone Quantitative risk analysis

Response prediction using the PC-NARX model for SDOF systems with degradation and parametric uncertainties

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Earthquake Engineering and Engineering Vibration 2022年第2期21卷 325-340页

作者： Gao Xiaoshu Chen Cheng Hou hetao Jiao Shenghu School of Civil Engineering Shandong UniversityJinan 250100China School of Engineering San Francisco State UniversitySan Francisco 94132-1722USA Shandong Engineering&Technology Research Center for Green Building and Intelligent Construction Jinan 250100China

Building collapses during recent earthquakes have brought up the need for research on factors pertaining to collapse and the safety of *** requires response replication of structures that account for uncertainties from ground motions and structural *** collapse often implies that the structural system is no longer capable of maintaining its gravity load-carrying capacity,which often points to factors involving strength and stiffness *** this study,the polynomial chaos nonlinear autoregressive with exogenous input form(PC-NARX)model is explored for dynamic response replication of a nonlinear single-degree-of-freedom(SDOF)*** generalized hysteretic Bouc-Wen model is applied to emulate stiffness and strength degradation for an SDOF structure close to collapse.A stochastic ground motion model is used to represent the uncertainties in seismic *** PC-NARX model is employed and further evaluated for response replication of an SDOF system with inherent uncertain structural properties.A generic algorithm(GA)is used to select the terms for structural dynamics,and polynomial chaos expansion(PCE)is used to incorporate uncertain parameters into NARX model *** is demonstrated that the PC-NARX model provides good accuracy to account for both ground motion and structural uncertainties into response replication of SDOF structures with significant strength and stiffness *** PC-NARX model thus presents a promising technique for collapse safety analysis of structures.

关键词： polynomial chaos expansion NARX model hysteresis degradation collapse

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不同连接方式下PVC空腔隔墙抗震性能研究

建筑结构学报 2024年第1期45卷 97-107页

作者：张标侯和涛杨阜航王彦明谢素蓉张兴海李海生房海波山东大学土建与水利学院山东济南250061 山东省绿色建筑智能建造工程技术研究中心山东济南250061 山东沂蒙设计咨询有限公司山东临沂276000 荣华建设集团有限公司山东青岛266000 中建八局第二建设有限公司山东济南250014

为研究采用不同连接方式PVC空腔隔墙的抗震性能,对3个安装PVC空腔隔墙的钢框架结构和1个单独钢框架结构进行对比拟静力试验。试验结果表明:现浇PVC空腔隔墙的初始刚度和峰值荷载较大,由于墙体与钢框架连接处开裂和角部压溃,其在小位移... 详细信息

为研究采用不同连接方式PVC空腔隔墙的抗震性能,对3个安装PVC空腔隔墙的钢框架结构和1个单独钢框架结构进行对比拟静力试验。试验结果表明:现浇PVC空腔隔墙的初始刚度和峰值荷载较大,由于墙体与钢框架连接处开裂和角部压溃,其在小位移下刚度退化明显,大位移下的破坏主要表现为墙体内部劈裂和面外鼓曲;采用L型钢连接件的墙体主要耗能形式为螺栓滑移和连接件屈服变形,在刚度、承载力方面对钢框架提升最小,主要破坏形式为节点处水泥砂浆开裂;采用U型和L型钢连接件连接方式相对安全可靠,能使钢框架和墙体在地震作用下更好地协同工作,可根据承载力需求,推荐使用;采用钢筋连接的墙体发生脆性破坏,延性较差,承载力和耗能能力较差,不推荐使用。最后,基于等效斜压杆原理,提出了PVC空腔隔墙的抗侧刚度简化计算公式,计算结果与试验结果吻合较好。

关键词：钢框架 PVC空腔隔墙连接方式拟静力试验抗震性能简化公式

Microstructure and Anticorrosion Property of AT13 Coatings Made by Combination of Nanoparticles Doping and Plasma Spraying Technique

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材料热处理学报 2004年第5B期25卷 964-969页

作者： LIChun-fu DAIJia-lin WANGBin ZHANGYing hetao-e LUOPing-ya StatekeyLaboratoryofOilandGasReservoirGeologyandExploitation（SouthwestPetroleumInstitute ChengduChina）／／MaterialScienceandEngi8neeringCollegeSouthwestPetroleumInstituteChengduChina MaterialScienceandEngi8neeringCollege SouthwestPetroleumInstituteChengduChina

Al2O3+13wt%TiO2 (AT13) particles were doped with 5%～30% nanoparticles and prefabricating powders were prepared by renewed granulation. AT13 coatings were prepared on the surface of steel 45# by air plasma spraying technique with the prefabricating powders. The microstructures of the AT13 prefabricating powders and the resulting coatings were investigated by SEM and EDS and XRD. The samples were undergone corrosion in the medium of 10% H2SO4 aqueous solution at temperature 80℃. The results indicate that the blistering time of coatings in the corrosive medium was increased with the increase of doped nanoparticle concentration while the time from blistering to spalling is independent of nanoparticle concentration. The results revealed that the structure of prefabricating powders was a twisted micrometer grade particle with dimension of 40-60μm, encapsulated by nanoparticles. The homogeneity of element distribution in coatings was improved and porosity was reduced. The phases of (Al2O3) 5.333 and orthorhombic Al2TiO5 were identified . The fracture analysis confirmed that there is a large amount of vermiculate whiskers with diameter of 10nm and length of 100～200 nm in coatings and the fracture type of coatings was the ductile trans-granular fracture.

关键词：显微结构等离子喷涂纳米颗粒掺杂防腐性能 AT13涂层

预制钢-混凝土组合楼梯抗弯性能与舒适度分析

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土木与环境工程学报（中英文） 2024年第4期46卷 151-158页

作者：何传民侯和涛张少远张秀璇房海波李海生山东大学土建与水利学院济南250061 山东大学第二医院济南250033 山东省绿色建筑智能建造工程技术研究中心济南250061 中建八局第二建设有限公司济南250014 荣华建设集团有限公司山东青岛266000

为推进组合材料在建筑结构中的应用,对预制钢-混凝土组合楼梯踏步的抗弯性能和楼梯整体的舒适度进行研究。进行6个楼梯踏步试件的四点弯曲试验,主要探究抗剪件形式和踏步与梯梁的连接方式对楼梯踏步承载性能的影响。试验结果表明,相对... 详细信息

为推进组合材料在建筑结构中的应用,对预制钢-混凝土组合楼梯踏步的抗弯性能和楼梯整体的舒适度进行研究。进行6个楼梯踏步试件的四点弯曲试验,主要探究抗剪件形式和踏步与梯梁的连接方式对楼梯踏步承载性能的影响。试验结果表明,相对于角钢和栓钉抗剪件,槽钢抗剪件对楼梯踏步的承载力提升更为显著。此外,焊接试件的承载力受抗剪件的影响较小,并且高于简支试件的承载力,在今后的工程应用中,焊接可以作为钢-混凝土组合楼梯踏步与梯梁连接的主要方式。为了更准确地研究楼梯踏步的力学行为,使用ABAQUS有限元软件对其进行建模,该有限元模型能够准确模拟楼梯踏步的力学行为。在验证模型准确性的基础上,对整体楼梯进行舒适度分析。结果表明,在规范限值范围内,楼梯的自振频率和人致激励下的加速度响应均满足行走的舒适度要求,使用过程中不会引起明显不适,符合人体工程学的要求。试验和建模分析证明,槽钢抗剪件对楼梯踏步的承载力提升效果更好,焊接可以作为楼梯踏步与梯梁的连接方式,并且楼梯的舒适度满足规范要求。

关键词：钢-混凝土组合楼梯抗弯试验有限元模拟舒适度

创新驱动农业发展的研究动态、热点演变及发展趋势

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北方农业学报 2024年第2期52卷 126-134页

作者：袁合涛梁旬殷兆霞安康学院陕南生态经济研究中心陕西安康725000 安康市农业技术推广中心陕西安康725000

【目的】系统呈现我国创新驱动农业发展研究动态、热点演变及发展趋势。【方法】基于中国知网(CNKI)数据库和CiteSpace6.2 R4计量分析软件,对2001年1月17日—2023年7月15日我国创新驱动农业发展研究动态、热点演变及发展趋势进行可视化... 详细信息

【目的】系统呈现我国创新驱动农业发展研究动态、热点演变及发展趋势。【方法】基于中国知网(CNKI)数据库和CiteSpace6.2 R4计量分析软件,对2001年1月17日—2023年7月15日我国创新驱动农业发展研究动态、热点演变及发展趋势进行可视化知识图谱分析。【结果】2001—2023年我国创新驱动农业发展研究经历了萌芽期、快速增长期、高质量发展期三个发展阶段;发文量排名前5的学科领域为农业经济、经济体制改革、农业基础科学、科学研究管理、信息经济,体现了创新驱动农业发展研究多学科交叉融合的新兴业态;发文量排名第一的作者是姜长云(6篇);政府部门、高校、科研院所是创新驱动农业发展研究发文量的主体,各发文作者及机构之间存在一定程度的合作关系,但合作比较松散;第一高频关键词是创新驱动,频次为87;#0创新驱动是创新驱动农业发展研究中引用次数最多的一个聚类;从关键词突现来看,突现强度最高的前五个关键词为乡村振兴(2.44)、智慧农业(1.92)、创新驱动(1.91)、产业化(1.86)和转型升级(1.76);#0创新驱动从2001年持续到2023年,其研究热度最高、交叉线最多。【结论】创新驱动、科技创新、中央一号文件、现代农业是当前创新驱动农业发展研究的热点,在乡村振兴、智慧农业、转型升级等方面的研究有待深化,未来趋势将会更加注重产业融合、数字农业、农业数智化研究。

关键词：创新驱动农业发展研究动态热点演变发展趋势