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微生物自修复混凝土载体材料研究进展

材料导报 2024年第13期38卷 80-94页

作者：侯福星白一鸣沈頔王剑云西安交通大学人居环境与建筑工程学院西安710049

裂缝的存在会使混凝土性能逐渐退化,因此进行裂缝修复具有重要意义。基于微生物诱导碳酸盐沉淀(MICP)的自修复技术作为一种环境友好、长期可行的修复方法而备受关注。在自修复体系中,微生物矿化沉积能力直接决定自修复的效果,而载体则... 详细信息

裂缝的存在会使混凝土性能逐渐退化,因此进行裂缝修复具有重要意义。基于微生物诱导碳酸盐沉淀(MICP)的自修复技术作为一种环境友好、长期可行的修复方法而备受关注。在自修复体系中,微生物矿化沉积能力直接决定自修复的效果,而载体则充当微生物“保护壳”的作用,为其新陈代谢提供足够的空间,载体材料的使用显著提高了微生物抵抗恶劣环境的能力,确保自修复效果的实现。本文评述了目前国内外应用于微生物自修复混凝土体系中载体材料的研究成果。对微生物自修复混凝土的工作机理进行阐述与总结,对多孔类载体、闭合类载体、纳米材料载体以及菌群自身充当载体等不同载体材料的研究进展进行了讨论与对比,分析了载体材料的专利转化以及工程应用,并指出当前存在的问题。最后,展望了载体材料在微生物自修复混凝土领域的应用前景,旨在为该技术的应用提供一定的指导和建议。

关键词：自修复机理裂缝微生物载体多孔类载体水凝胶

A dynamic-inner LSTM prediction method for key alarm variables forecasting in chemical process

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Chinese Journal of Chemical Engineering 2023年第3期55卷 266-276页

作者： yiming bai Shuaiyu Xiang Feifan Cheng Jinsong Zhao Department of Chemical Engineering Tsinghua UniversityBeijing 100084China Beijing Key Laboratory of Industrial Big Data System and Application Tsinghua UniversityBeijing 100084China Sinopec Engineering Incorporation Beijing 100084China

With the increase in the complexity of industrial system, simply detecting and diagnosing a fault may be insufficient in some cases, and prognosing the fault ahead of time could have a certain necessity. Accurate prediction of key alarm variables in chemical process can indicate the possible change to reduce the probability of abnormal conditions. According to the characteristics of chemical process data, this work proposed a key alarm variables prediction model in chemical process based on dynamic-inner principal component analysis(DiPCA) and long short-term memory(LSTM). DiPCA is used to extract the most dynamic components for prediction. While LSTM is used to learn the relationship and predict the key alarm variables. This work used a simulation data set and a real hydrogenation process data set for applications and explained the model validity from the essential characteristics. Comparison of results with different models shows that our model has better prediction accuracy and performance, which can provide the basis for fault prognosis and health management.

关键词： Fault prognosis Process systems Safety Prediction Principal component analysis Long short term memory

Ternary blend strategy in benzotriazole-based organic photovoltaics for indoor application

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Green Energy & Environment 2021年第6期6卷 920-928页

作者： Yinglong bai Runnan Yu yiming bai Erjun Zhou Tasawar Hayat Ahmed Alsaedi Zhan'ao Tan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing100029China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China NAAM Research Group Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Organic photovoltaics(OPVs)suitable for application in indoor lighting environments can power a wide range of internet of things(Io T)related electronic *** ternary structure has huge advantages in improving the photovoltaic performance of OPVs,including broadening the light absorption,improving the charge transport,manipulating the energy loss(E_(loss))and so ***,we use wide-bandgap photo-active materials,including the benzotriazole-based polymer donor(J52-F),chlorinated polymer donor(PM7)and A_(2)-A_1-D-A_1-A_(2)-structured acceptor(BTA3),to construct ternary OPVs for indoor light *** from the introduction of PM7 as the third component in J52-F:BTA3-based blend,a gratifying PCE of 20.04%with a high V_(OC)of 1.00 V can be obtained under the test conditions with an illumination of 300 lx from an LED lighting source with a color temperature of 3000 *** excellent device performance is inseparable from the matched spectrum,enhanced light absorption and the reduced E_(loss),while the improved charge transport capability and suppression of carrier recombination also play an indelible *** work shows a potential material system to meet the requirement of devices applied under indoor ***,these findings demonstrate that designing multi-component OPVs is indeed a feasible way to further improve the performances of the photovoltaic energy conversion system for indoor applications.

关键词： Organic photovoltaics Indoor application Ternary blends Open-circuit voltage Charge generation

The Unmanned Surface Vehicle Course Tracking Control with Input Saturation

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The Unmanned Surface Vehicle Course Tracking Control with In...

Recent Advances of Monolithic All-Perovskite Tandem Solar Cells:From Materials to Devices

第36届中国控制会议

作者： yiming bai Yongsheng Zhao Yunsheng Fan Information Science and Technology College Dalian Maritime University

ISBN: (纸本)9781538629185

The great challenge posed by unmanned surface vehicle is to improve the automation level in practical application. In this paper, an unmanned surface vehicle course tracking controller is designed to overcome the input saturation caused by the limitation of the steering engine. The feedback control law is developed based on backstepping design method with the Lyapunov stability theory. An auxiliary design system is employed to handle the effect of input saturation. The simulation is carried out to verify the backstepping control design.

关键词： Course tracking input saturation backstepping algorithm

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Chinese Journal of Chemistry 2022年第7期40卷 856-871页

作者： Shan Jiang yiming bai Zongwen Ma Shengli Jin Chao Zou Zhao'ao Tan State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Solar Energy Utilization&Energy Saving Technology of Zhejiang Province Zhejiang Energy Group R&D Institute Co.Ltd.HangzhouZhejiang 311121China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhouZhejiang 325027China

Organic-inorganic metal-halide perovskite solar cells(PerSCs)have achieved significant progresses due to their outstanding optoelectronic charac-teristics,and the power conversion efficiency(PCE)of single-junction PerSCs has been boosted from 3.8%to a certified 25.2%.However,the efficien-cy of single-junction cells is governed by the Shockley-Queisser(S-Q)radiative limit,and fabricating all-perovskite tandem solar cells is a particularly attractive method to break the S-Q *** the bandgap of lead(Pb)-based mixed halide perovskite can be tuned from 1.55 eV to 2.3 eV,and the mixed tin(Sn)-Pb perovskites have bandgap of~1.2 eV,these perovskites become the best candidates for the front and rear subcells of all-perovskite tandem device,*** this review,we firstly summarize the current development progresses of two-terminal(2-T)all-perovskite tandem so-lar *** further optimizing the device performance,the wide bandgap mixed halide perovskites for front subcell,mixed Sn-Pb narrow bandgap perovskites for rear subcell,and the interconnection layer(ICL)of 2-T tandem device are then *** review aims to open a pathway to real-ize highly efficient all-perovskite tandem solar cells.

关键词： Perovskite phase Tandem solar cells Interconnection layer Energy conversion Complementary absorption

Printable SnO2 cathode interlayer with up to 500 nm thickness-tolerance for high-performance and large-area organic solar cells

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Science China Chemistry 2020年第7期63卷 957-965页

作者： yiming bai Chunyan Zhao Shuai Zhang Shaoqing Zhang Runnan Yu Jianhui Hou Zhan’ao Tan Yongfang Li State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

The printable electrode interlayer with excellent thickness tolerance is crucial for mass production of organic solar cells(OSCs)by solution-based print techniques. Herein, high-quality printable SnO2 films are simply fabricated by spin-coating or bladecoating the chemical precipitated SnO2 colloid precursor with post thermal annealing treatment. The SnO2 films possess outstanding optical and electrical properties, especially extreme thickness-insensitivity. The interfacial electron trap density of SnO2 cathode interlayers(CILs) are very low and show negligible increase as the thicknesses increase from 10 to 160 nm,resulting in slight change of the power conversion efficiencies(PCEs) of the PM6:Y6 based OSCs from 16.10% to 13.07%. For blade-coated SnO2 CIL, the PCE remains high up to 12.08% even the thickness of SnO2 CIL is high up to 530 nm. More strikingly, the large-area OSCs of 100 mm2 with printed SnO2 CILs obtain a high efficiency of 12.74%. To the best of our knowledge, this work presents the first example for the high-performance and large-area OSCs with the thickness-insensitive SnO2 CIL.

关键词： organic solar cells printable Sn02 cathode interlayer thickness-insensitivity large-area

Podded Propulsion Unmanned Surface Vehicle Model Identification Based on Field Experiments

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Podded Propulsion Unmanned Surface Vehicle Model Identificat...

Temperature dependent spectral response characteristic of Ⅲ-Ⅴ compound tandem cell

第36届中国控制会议

作者： Dongdong Mu Guofeng Wang Yunsheng Fan yiming bai School of Information Science and Technology Dalian Maritime University

ISBN: (纸本)9781538629185

Model is the basis of the control,and in order to achieve the autonomous navigation of podded propulsion unmanned surface vehicle,its model is determined to be the beginning of all the *** research object of this paper is Dalian Maritime University "Lanxin" podded propulsion unmanned surface *** practical engineering applications,the response model is often used to design ship *** first of all,for "Lanxin" unmanned surface vehicle,the MMG model of three DOF is simplified as a response model by force analysis and conditional ***,the field experiments（turning experiment and zig-zag experiment） are executed to collect the experimental *** turning experiment data and zig-zag experiment data are used to identify the response model parameters by recursive least square method,*** the correctness of the identification results are verified by *** results show that the identification result of zig-zag experiment data is more close to the reality than the identification result of turning experiment data,which it proves the correctness of modeling and the feasibility of identification scheme.

关键词： Unmanned surface vehicle POD response model field experiments recursive least squares

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Chinese Science Bulletin 2009年第3期54卷 353-357页

作者： LIU Lei CHEN NuoFu WANG Yu bai yiming CUI Min GAO FuBao Key Laboratory of Semiconductor Materials Science Institute of Semiconductors Chinese Academy of Sciences POB 912 Beijing 100083. China

The GaInP/GaAs/Ge triple-junction tandem cells with a conversion efficiency of 27.1% were fabricated using metalorganic chemical vapor deposition (MOCVD) technique. Temperature dependence of the spectral response measurements of the GaInP/GaAs/Ge tandem cell was performed by a quantum effi- ciency system at temperatures ranging from 25℃ to 160℃. The red-shift phenomena of the absorption limit for all subcells were observed with increasing temperature, which is dued to the energy gap nar-rowing with temperature. The short-circuit current densities (Jsc) of GaInP, GaAs and Ge subcells at room temperature calculated based on the spectral response data were 12.9, 13.7 and 17 mA/cm2, re- spectively. The temperature coefficient of Jsc for the tandem cell was determined to be 8.9 μA/(cm2·℃), and the corresponding temperature coefficient of the open-circuit voltage deduced from the se- ries-connected model was -6.27 mV/℃.

关键词：串行细胞光谱响应温度系数化学沉积作用

Quantum efficiency and temperature coefficients of GaInP/GaAs dual-junction solar cell

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Science China(Technological Sciences) 2009年第5期52卷 1176-1180页

作者： LIU Lei CHEN NuoFu bai yiming CUI Ming ZHANG Han GAO FuBao YIN ZhiGang ZHANG XingWang Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesPOB 912Beijing 100083China National Laboratory of Microgravity Institute of MechanicsChinese Academy of SciencesBeijing 100080China

GaInP/GaAs dual-junction solar cell with a conversion efficiency of 25.2% has been fabricated using metalorganic chemical vapor deposition (MOCVD) technique. Quantum efficiencies of the solar cell were measured within a temperature range from 25 to 160°C. The results indicate that the quantum efficiencies of the subcells increase slightly with the increasing temperature. And red-shift phenomena of absorption limit for all subcells are observed by increasing the cell’s work temperature, which are consistent with the viewpoint of energy gap narrowing effect. The short-circuit current density temperature coefficients dJ sc/dT of GaInP subcell and GaAs subcell are determined to be 8.9 and 7.4 μA/cm2/°C from the quantum efficiency data, respectively. And the open-circuit cell voltage temperature coefficients dV oc/dT calculated based on a theoretical equation are ?2.4 mV/°C and ?2.1 mV/°C for GaInP subcell and GaAs subcell.

关键词： quantum efficiency temperature coefficient solar cell