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混凝土抗压强度的可解释深度学习预测模型

东北大学学报（自然科学版） 2024年第5期45卷 738-744,752页

作者：章伟琪王辉明新疆大学建筑工程学院新疆乌鲁木齐830017

为快速、准确地预测混凝土抗压强度,采用深度学习技术建立预测模型,使用贝叶斯优化算法进行模型自动优化调节,并结合SHapley Additive exPlanations(SHAP)可解释性方法对预测结果进行分析,以克服预测模型的“黑盒子”问题.利用深度学习... 详细信息

为快速、准确地预测混凝土抗压强度,采用深度学习技术建立预测模型,使用贝叶斯优化算法进行模型自动优化调节,并结合SHapley Additive exPlanations(SHAP)可解释性方法对预测结果进行分析,以克服预测模型的“黑盒子”问题.利用深度学习模型挖掘各输入特征参数与抗压强度之间潜在的规律;通过可视化输入特征参数的SHAP值分析参数对抗压强度预测结果的重要性及影响规律.结果表明,所建深度学习模型相比其他传统模型具有更好的性能;SHAP分析结果与试验结果一致,该模型较好地反映了各特征参数之间复杂的非线性关系,可为混凝土材料的工程设计提供依据和参考.

关键词：混凝土抗压强度深度学习 SHAP方法可解释性

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In-beam gamma rays of CSNS Back-n characterized by black resonance filter

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NUCLEAR SCIENCE AND TECHNIQUES 2024年第10期35卷 1-12页

作者： Wang, Jin-Cheng Ren, Jie Jiang, wei Ruan, Xi-Chao Liu, Ying-Yi Yang, Hao-Lan Xu, Kuo-Zhi Pan, Xin-Yi Sun, qi Bao, Jie Huang, Han-Xiong Bai, Hao-Fan Bai, Jiang-Bo Cao, Ping Chen, qi-Ping Chen, Yong-Hao Duan, Wen-Hao Fan, An-Chuan Fan, Rui-Rui Feng, Chang-qing Gu, Min-Hao Han, Chang-Cai Han, Zi-Jie He, Guo-Zhu He, Yong-Cheng Hong, Yang Hu, Yi-wei Jiang, Zhi-Jie Kang, Ling Lan, Chang-Lin Li, Bo Li, Feng Li, qiang Li, Xiao Li, Yang Liu, Jie Liu, Rong Liu, Shu-Bin Liu, Yi-Na Luan, Guang-Yuan Ning, Chang-Jun qiu, Yi-Jia Ren, Wen-Kai Ren, Zhi-Zhou Song, Zhao-Hui Sun, Kang Tan, Zhi-Xin Tang, Jing-Yu Tang, Sheng-Da Wang, Li-Jiao Wang, Peng-Cheng Wang, Zhao-Hui Wen, Zhong-wei Wu, Xiao-Guang Wu, Xuan Wu, Ze-Peng Xia, Cong Xie, Li-Kun Yi, Han Yu, Tao Yu, Yong-Ji zhang, Guo-Hui zhang, Hang-Chang zhang, qi-wei zhang, Xian-Peng zhang, Yu-Liang zhang, Zhi-Yong Zhao, Mao-Yuan Zhou, Zhi-Hao Zhu, Ke-Jun Zou, Chong China Inst Atom Energy Key Lab Nucl Data Beijing 102413 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China Spallat Neutron Source Sci Ctr Dongguan 523803 Peoples R China Chinese Acad Sci Inst High Energy Phys State Key Lab Particle Detect & Elect Beijing 100049 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Peking Univ Sch Phys State Key Lab Nucl Phys & Technol Beijing 100871 Peoples R China Fudan Univ Inst Modern Phys Shanghai 200433 Peoples R China Univ Sci & Technol China State Key Lab Particle Detect & Elect Hefei 230026 Peoples R China Univ Sci & Technol China Sch Nucl Sci & Technol Hefei 230026 Peoples R China Univ Sci & Technol China Dept Modern Phys Hefei 230026 Peoples R China China Acad Engn Phys Inst Nucl Phys & Chem Mianyang 621900 Peoples R China Univ Sci & Technol China USTC Archaeometry Lab Hefei 230026 Peoples R China Northwest Inst Nucl Technol Xian 710024 Peoples R China Lanzhou Univ Sch Nucl Sci & Technol Lanzhou 730000 Peoples R China Univ Sci & Technol China Inst Adv Technol Hefei 230027 Peoples R China

The back-streaming white-neutron beamline (Back-n) of the China Spallation Neutron Source is an essential neutron- research platform built for the study of nuclear data, neutron physics, and neutron applications. Many types of cross-sectional neutron-reaction measurements have been performed at Back-n since early 2018. These measurements have shown that a significant number of gamma rays can be transmitted to the experimental stations of Back-n along with the neutron beam. These gamma rays, commonly referred to as in-beam gamma rays, can induce a non-negligible experimental background in neutron-reaction measurements. Studying the characteristics of in-beam gamma rays is important for understanding the experimental background. However, measuring in-beam gamma rays is challenging because most gamma-ray detectors are sensitive to neutrons; thus, discriminating between neutron-induced signals and those from in-beam gamma rays is difficult. In this study, we propose the use of the black resonance filter method and a CeBr3 scintillation detector to measure the characteristics of the in-beam gamma rays of Back-n. Four types of black resonance filters, Ta-181, Co-59, Ag-nat, and Cd-nat, were used in this measurement. The time-of-flight (TOF) technique was used to select the detector signals remaining in the absorption region of the TOF spectra, which were mainly induced by in-beam gamma rays. The energy distribution and flux of the in-beam gamma rays of Back-n were determined by analyzing the deposited energy spectra of the CeBr3 scintillation detector and using Monte Carlo simulations. Based on the results of this study, the background contributions from in-beam gamma rays in neutron-reaction measurements at Back-n can be reasonably evaluated, which is beneficial for enhancing both the experimental methodology and data analysis.

关键词： In-beam gamma rays Back-n Black filter resonance technique In-beam gamma rays Back-n CeBr3 scintillator Black filter resonance technique C6D6 DETECTOR SYSTEM LINE

基于深度信念极限学习机与卷积优化算法的洪水预报方法

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水电能源科学 2024年第8期42卷 48-52页

作者：徐军杨张奇伟蔡鹏罗远林张坚张楚华东勘测设计研究院有限公司浙江杭州311122 昆山市水务局江苏苏州215131 淮阴工学院自动化学院江苏淮安223003

针对洪水峰高量大、汇流时间短以及流域地貌复杂,导致洪水预报难度大和预报精度不理想的问题,提出一种基于深度信念极限学习机(DBN-ELM)和改进卷积优化算法(ICOA)的ICOA-DBN-ELM模型。以渭河上游北道水文站点2006~2020年的日径流数据作... 详细信息

针对洪水峰高量大、汇流时间短以及流域地貌复杂,导致洪水预报难度大和预报精度不理想的问题,提出一种基于深度信念极限学习机(DBN-ELM)和改进卷积优化算法(ICOA)的ICOA-DBN-ELM模型。以渭河上游北道水文站点2006~2020年的日径流数据作为输入数据,并将该模型与BP、ELM、DBN-BP、DBN-ELM、COA-DBN-ELM模型进行对比。结果表明,所建立的ICOA-DBN-ELM模型有更好的预报精度,在洪水预报领域具有良好的应用前景。

关键词：洪水预报深度信念极限学习机参数优化卷积优化算法

A Chiral Helical Compound Based on Achiral Components

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Chinese Journal of Structural Chemistry 2007年第5期26卷 551-554页

作者： zhang qi-wei WANG Gui-Xian Department of Chemistry Lishui University Lishui Zhejiang 323000 China

The title compound, [Cu（dpa）（2,2＇-bipy）（H2O）2]n 1 （H2dpa = diphenic acid and 2,2＇- bipy = 2,2＇-bipyridine）, has been synthesized and its structure was determined by single-crystal X-ray diffraction. The crystal is of orthorhombic, space group P212121 with a = 10.597（4）, b = 11.317（4）, c = 17.630（7）A, V = 2114.3（14）A^3, C24H20CuN2O6, Mr = 495.97, Z = 4, Dc = 1.558 g/cm^3, μ = 1.079 mm^-1, F（000） = 1020, Flack value = 0.052（18）, R = 0.0430 and wR = 0.1016 for 3381 observed reflections （Ⅰ 〉 2σ（Ⅰ））. In compound 1, the dpa ligands link metal ions into helical structures in the same direction.

关键词： crystal structure chiral hydrogen bond diphenic acid helix

Microwave-assisted synthesis,crystal structure and toxicity of L-aspartic acid zinc spiral linear supramolecular polymer

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Science China Chemistry 2004年第4期47卷 295-300页

作者： zhang Youming LIN qi wei Taibao College of Chemistry and Chemical Engineering Gansu Key Laboratory of Polymer Materials Northwest Normal University Lanzhou730070China College of Chemistry and Chemical Engineering Gansu Key Laboratory of Polymer Materials Northwest Normal University Lanzhou730070China College of Chemistry and Chemical Engineering Gansu Key Laboratory of Polymer Materials Northwest Normal University Lanzhou730070China

L-aspartic acid zinc was synthesized by a rapid and convenient method in high yield under microwave conditions, and its single crystal structure was analyzed by X-ray diffraction. The structure unit of the title compound is [Zn(L-Asp)(H2O)2]·H2O, which is a bicyclo-complex forming a spiral linear polymer via coordination bonds. The spiral linear polymers are assembled as a three-dimensional supramolecule by intermolecular hydrogen bonds. The crystal belongs to the orthorhombic crystal system, P2(1)2(1)2(1) space group, a=0.7830(3) nm, b=0.9369(4) nm, c=11.599(5) nm, α=β=γ=90.00°, V=0.8509(6) nm3, Z=4, Dc=1.955 g/cm3, F(000)=512, μ=2.289. The toxicity of the title compound is lower than that of glutamic acid zinc and zinc sulfate. Keywords L-aspartic acid - zinc - microwave - supramolecule - toxicity

关键词： L-aspartic acid zinc microwave supramolecule toxicity

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基于模型分析的光伏阵列发电量优化仿真研究

计算机仿真 2024年第7期41卷 140-145页

作者：张伟琦甘英浩张剑锋王艳敏哈尔滨工业大学电气工程及自动化学院黑龙江哈尔滨150001 黑龙江东方学院建筑工程学院黑龙江哈尔滨150066

针对光伏系统的阵列设计与低发电量问题,以某智慧校园为实际应用场景,从光伏板参数特性与太阳能辐射量两个方面建模研究以优化系统发电量。首先建立了单相光伏板正向输出模型,并利用仿真分析得到内外参数影响下的系统输出特性;基于教学... 详细信息

针对光伏系统的阵列设计与低发电量问题,以某智慧校园为实际应用场景,从光伏板参数特性与太阳能辐射量两个方面建模研究以优化系统发电量。首先建立了单相光伏板正向输出模型,并利用仿真分析得到内外参数影响下的系统输出特性;基于教学楼日常用电负荷需求,设计光伏系统的最大输出参数,并结合教学楼顶部空间限制对光伏阵列进行优化设计;考虑光伏发电的客观限制因素,通过计算太阳辐射量建立了任意角度下的光伏阵列太阳辐射模型,以提高系统发电量。

关键词：光伏发电模型仿真发电量优化太阳辐射阵列角度智慧校园

A facile strategy to construct MOF-based nanocatalyst with enhanced activity and selectivity in oxytetracycline degradation

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Nano Research 2024年第7期17卷 5863-5871页

作者： Yanjing Ke Jiaxing zhang Xin Peng Zhiyi zhang Xu Wang wei qi Mengfan Wang School of Life Sciences Faculty of MedicineSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China The Co-Innovation Centre of Chemistry and Chemical Engineering of Tianjin Tianjin 300072China Tianjin Key Laboratory of Membrane Science and Desalination Technology Tianjin 300350China

Recently,many efforts have been dedicated to construct artificial catalysts with enzyme-like ***,it is still a big challenge to endow artificial catalysts with specific substrate *** this study,we developed a facile strategy to construct a MIL-53(Fe)-based nanocatalyst with designable selectivity in the degradation of oxytetracycline(OTC).Through the Fe–O–P conjunction,oxytetracycline aptamer(OA)can be easily anchored on MIL-53(Fe)to provide the specific site for OTC *** verified that the obtained MIL-53(Fe)-Apt nanocatalyst displayed enhanced catalytic ability in the degradation of OTC,whereas obvious suppression toward other substrate *** performance therefore brings about an anticipated selectivity toward ***,we highlighted that the configuration of aptamers on MIL-53(Fe)can be modulated through varying conjunction ***–function analysis revealed that aptamer configuration affects the local concentration of substrate around catalytic site,which thus decides the catalytic performance toward *** work presented a facile and promising strategy for developing artificial catalysts with designable selectivity.

关键词： MIL-53(Fe) aptamer Fe-O-P catalytic selectivity oxytetracycline

China＇s Market Transition： A Third Reform Strategy

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Fudan Journal of the Humanities and Social Sciences 2011年第3期4卷 1-17页

作者： zhang wei-qi

This paper tries to explain how China can keep domestic stability under both socialist government and rapid capitalist economic growth. By tracing China＇s reform experience and comparing it with the mainstream reform strategies, the paper argues that, first, Chin＇s reform strategy is fundamentally different from the conventional reform strategies; second, China＇s success to a large extent is the result of Chinese leaders＇ decision making and careful management over reform process rather than of simply market force. Finally, the paper suggests that the active role the Chinese Communist Party plays in economic reform grants its legitimacy, thus enabling it to enjoy political stability under long term rapid economic and social transition.

关键词： China market transition reform strategy

基于白光中子源的^(197)Au中子辐射俘获截面测量及共振参数分析

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物理学报 2024年第7期73卷 104-113页

作者：罗淏天张奇玮栾广源王晓宇邹翀任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉吴鸿毅顾旻皓余滔解立坤陈永浩安琪白怀勇鲍煜曹平陈昊磊陈琪萍陈裕凯陈朕崔增琪樊瑞睿封常青高可庆韩长材韩子杰何泳成洪杨黄蔚玲黄锡汝季筱璐吉旭阳蒋伟江浩雨姜智杰敬罕涛康玲康明涛李波李超李嘉雯李论李强李晓李样刘荣刘树彬刘星言穆奇丽宁常军齐斌斌任智洲宋英鹏宋朝晖孙虹孙康孙晓阳孙志嘉谭志新唐洪庆唐靖宇唐新懿田斌斌王丽娇王鹏程王琦王涛峰文杰温中伟吴青彪吴晓光吴煊羊奕伟易晗于莉于永积张国辉张林浩张显鹏张玉亮张志永赵豫斌周路平周祖英朱丹阳朱科军朱鹏朱兴华中国原子能科学研究院核数据重点实验室北京102413 中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803 核探测与核电子学国家重点实验室北京100049 中国科学技术大学近代物理系核探测与核电子学国家重点实验室合肥230026 北京大学物理学院核物理与核技术国家重点实验室北京100871 中国工程物理研究院核物理与化学研究所绵阳621900 西北核技术研究院西安710024 中国科学院大学北京100049 中国科学技术大学工程与应用物理系合肥230026 北京航空航天大学物理学院北京100083 华能山东石岛湾核电有限公司荣成264312

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室... 详细信息

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室建立了伽马全吸收装置(Gamma total absorption facility,GTAF),该装置用28块六棱BaF_(2)晶体和12块五棱BaF_(2)晶体构成了外径25 cm,内径10 cm的球壳,覆盖了95.2%的立体角.利用GTAF在中国散裂中子源Back-n束线上,测量了197Au(n,γ)的反应截面数据.测量数据通过能量筛选、PSD方法、晶体多重性筛选进行了初步本底扣除,随后结合对^(nat)C及空样品的测量数据对本底进行了分析及扣除,获得了197Au俘获反应的产额,利用SAMMY程序拟合得到了^(197)Au在1—100 e V的共振能量、中子共振宽度和伽马共振宽度参数.实验测量结果与ENDF/B-VIII.0数据库符合良好,其共振参数存在一定差异,分析原因可能与GTAF能量分辨率、Back-n的中子能谱测量精度、以及实验本底扣除方法相关,这也是下一步工作的重点.

关键词：中子辐射俘获截面共振参数白光中子源伽马全吸收装置

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