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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 128-140页

作者： Bing Sun Ruipeng Jing Leijiao Ge Yuan Zeng Shimeng Dong Luyang Hou the School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China State Grid Corporation of China BeijingChina the School of Computer Science(National Pilot Software Engineering School) Beijing University of Posts and TelecommunicationsBeijingChina

The smart distribution network(SDN)is integrat ing increasing distributed generation(DG)and energy storage(ES).Hosting capacity evaluation is important for SDN plan ning with *** and ES are usually invested by users or a third party,and they may form friendly microgrids(MGs)and operate *** centralized dispatching meth od no longer suits for hosting capacity evaluation of SDN.A quick hosting capacity evaluation method based on distributed optimal dispatching is ***,a multi-objective DG hosting capacity evaluation model is established,and the host ing capacity for DG is determined by the optimal DG planning *** steady-state security region method is applied to speed up the solving process of the DG hosting capacity evalua tion ***,the optimal dispatching models are estab lished for MG and SDN respectively to realize the operating *** the distributed dispatching strategy,the dual-side optimal operation of SDN-MGs can be realized by several iterations of power exchange ***,an SDN with four MGs is conducted considering multiple flexible *** shows that the DG hosting capacity of SDN oversteps the sum of the maximum active power demand and the rated branch ***,the annual DG electricity oversteps the maximum active power demand value.

关键词： Smart distribution network(SDN) microgrid hosting capacity multi-objective optimization distributed opti mal dispatching flexible resource

Efficient photo-induced RTP materials based on phenothiazine and polycyclic aromatic hydrocarbons:Tunable emission color and thermal stimulus response

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Science China Materials 2024年第9期67卷 2778-2788页

作者： Jiayi Liang Jie Yang Yunsheng Wang Mingda Shan Zhenjiang Liu Jia Ren Manman Fang Zhen Li Institute of Molecular Aggregation Science Tianjin UniversityTianjin 300072China Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Department of ChemistryWuhan UniversityWuhan 430072China Joint School of National university of Singapore and tianjin university International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China

The development of photo-responsive room temperature phosphorescence(RTP)materials has attracted more and more attention for their broad application *** now,it is still difficult to obtain the related ma-terials with both high efficiency and long *** the lacking of emission in blue and red regions also largely re-stricts their further *** this work,we reported a new strategy to maintain both high efficiency and long lifetime in RTP luminogens through the integration of phenothiazine to facilitate n-π*transition and polycyclic aromatic hydro-carbons(PAHs)dominated byπ-π**** they were doped into polymer matrix,full color photo-induced RTP materials were obtained for the changedπ-conjugation of *** them,PTri@PVP showed the best RTP per-formance with phosphorescence efficiency of 20.73%and lifetime up to 819 ***,after turning off the ul-traviolet-visible(UV)irradiation upon this system,time-de-pendent phosphorescence afterglow from green to blue was exhibited,which was found to originate from two distinct molecular conformations and could be further regulated by thermal ***,multiple anti-counterfeiting applications,including screen printing,multi-color patterns and multi-dimensional information encryption,were suc-cessfully demonstrated.

关键词： conformation phenothiazine derivatives room-temperature phosphorescence dual RTP emissions

基于CsPbBr_(3)-MXene纳米结构的高线性度突触光电晶体管用于图像分类和边缘检测

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Science China Materials 2024年第7期67卷 2246-2255页

作者：代岩陈耿旭黄伟龙许晨晖刘常飞黄紫玉郭太良陈惠鹏 National&Local United Engineering Laboratory of Flat Panel Display Technology Institute of Optoelectronic DisplayCollege of Physics and Information EngineeringFuzhou UniversityFuzhou 350108China Fujian Science&Technology innovation Laboratory for Optoelectronic Information of China Fuzhou 350100China

人工光突触为克服数据存储和处理中的冯诺依曼瓶颈,提供了一种有效的解决方案.人工光突触通过消除带宽连接密度的权衡和低功耗,展现了其相较于电突触的优势.钙钛矿量子点由于其易于合成和良好的光电性能,在人工光突触中引起了广泛的关注... 详细信息

人工光突触为克服数据存储和处理中的冯诺依曼瓶颈,提供了一种有效的解决方案.人工光突触通过消除带宽连接密度的权衡和低功耗,展现了其相较于电突触的优势.钙钛矿量子点由于其易于合成和良好的光电性能,在人工光突触中引起了广泛的关注.然而,有限的载流子迁移率和非线性性能阻碍了它在神经形态中的应用.本研究提出了一种吸附CsPbBr_(3)的MXene纳米结构(CsPbBr_(3)-MXene),即在MXene纳米片上原位生长CsPbBr_(3)量子点,并将其作为光电突触晶体管的吸光层,CsPbBr_(3)和MXene形成的异质结构增强了光电流的产生.在相同的光脉冲刺激下,与仅含CsPbBr_(3)的突触晶体管相比,CsPbBr_(3)-MXene突触晶体管的兴奋性突触后电流(EPSC)提高了24.6%.经过计算和比较,其线性度有了明显的改善(从4.586到1.099);此外,其对手写数字分类的识别准确率也显著提高(从86.13%到92.05%);边缘检测的F1分数也有所提高(从0.8165到0.9065),更加接近于1.这些提升表明这项工作将有助于神经计算领域的进一步发展.

关键词： in-situ growth CsPbBr_(3)-attached MXene synaptic phototransistor pattern recognition accuracy image preproces-sing

Controlled growth of Mo2C pyramids on liquid Cu surface

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Journal of Semiconductors 2020年第8期41卷 50-51页

作者： Yixuan Fan Le Huang Dechao Geng Wenping Hu tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University and Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

Precise spatial control of 2D materials is the key capability of engineering their optical,electronic,and mechanical ***,growth of novel 2D Mo2C on Cu surface by chemical vapor deposition method was revealed to be seed-induced 2D growth,limiting further synthesis of complex Mo2C spatial *** this research,we demonstrate the controlled growth of Mo2C pyramids with numerous morphologies,which are characterized with clear terraces within the *** whole evolution for Mo2C pyramids in the coursed of CVD process has been detected,posing significant potential in probing growth *** formation of the Mo2C pyramids arises from the supersaturation-induced nucleation and concentration-gradient driven diffused growth of a new Mo2C layer on the edged areas of intrinsic ones,as supported by STEM *** work provides a novel Mo2C-based pyramid structure and further reveals a sliding growth mechanism,which could offer impetus for the design of new 3D spatial structures of Mo2C and other 2D materials.

关键词： Mo2C pyramids liquid Cu chemical vapor deposition

Preparation of Boric-10 Acid Applied in Nuclear Industry

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Transactions of tianjin university 2015年第2期21卷 172-177页

作者：张雷张卫江徐姣李波 School of Chemical Engineering and Technology Tianjin University

Because of the superior features of boron-10 isotope in absorbing hot neutrons, boric-10 acid(H310BO3)has been used widely in nuclear industry. Boric-10 acid is obtained from boron-10 trifluoride(10BF3) by esterification and hydrolyzation. In this study, trimethyl borate-10 [(CH3O)310B] was prepared from boron-10 trifluoride(10BF3)through chemical exchange rectification. In addition, the hydrolyzation of trimethyl borate-10 was investigated with different p H values, temperatures and molar ratios of water to trimethyl borate-10. Under the optimum process conditions, high yield of boric-10 acid with nuclear industrial purity grade was realized.

关键词： boric-10 acid nuclear industry boron trifluoride trimethyl borate

Equilibrium on the Hydrolysis of Boron Trifluoride in Large Amount of Water

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Transactions of tianjin university 2016年第5期22卷 486-491页

作者： Zhang Weijiang Liu Tianyu Lang Wuke Xu Jiao School of Chemical Engineering and Technology Tianjin University College of Chemistry and Life Science Weinan Normal University

In order to clarify the equilibrium components in the hydrolysis solution of boron trifluoride(BF_3-H_2O),the BF_3-H_2O was prepared by mixing BF_3-CH_3OH with large amount of water,in which the stoichiometric concentration of BF_3 is less than 0.1 mol/*** ionic equilibrium models were proposed to simulate the hydrolysis equilibrium of BF_3 and tested by special acid-base titration *** most accurate ion equilibrium constants were *** model,which was assumed to have no HF,was proved to be more representative for the real system and used to simulate the hydrolysis equilibrium of BF_*** simulation suggested that H^+,BF_4^-,BF_3OH^- and H_3BO_3 were the main species in the dilute hydrolysis solution,while BF_2(OH)_2^- and F^- were insignificant species whose concentrations were both in the order of 10^(-4) mol/L magnitude,and BF(OH)_3^- could be omitted because its concentration almost equaled ***,the equilibrium constant of the overall ionic reaction at 25℃ was obtained as 161.6.

关键词： boron trifluoride hydrolysis equilibrium ionic equilibrium simulation

Determination of Boron Trifluoride in Boron Trifluoride Complex by Fluoride Ion Selective Electrode

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Transactions of tianjin university 2016年第1期22卷 83-88页

作者：郎五可张卫江唐银徐姣张雷 School of Chemical Engineering and Technology Tianjin University College of Chemistry and Life Science Weinan Normal University School of Pharmaceutical Engineering Shenyang Pharmaceutical University

A method was proposed to determine boron trifluoride in boron trifluoride complex using fluoride ion selective electrode(ISE). Hydroxide was chosen to mask aluminum for the determination of 0.01—0.1 mol/L of fluoride. The simulation indicated that the permissible aluminum masked at a certain p H value was limited and hardly related to F-concentration and boric acid. It is better to control p H value below 11.5 and the aluminum concentration within 0.025 mol/L to minimize the interference of hydroxide to the fluoride ISE. The decomposition conditions of boron trifluoride by aluminum chloride were investigated. It is found that the F-detection ratio will approach 1.0 if the Al/F molar ratio is 0.3—0.7 and aluminum concentration is no more than 0.02 mol/L when heated at 80 ℃ for 10 min. In one word, hydroxide is quite fit to mask aluminum for samples which contain high content of fluoride and aluminum and the BF3 content can be successfully determined by this method.

关键词： boron trifluoride complex fluoride ion selective electrode sodium hydroxide aluminum chloride

Kinetics of the Reaction Between Boron Trifluoride Methanol Complex and Sodium Methoxide to Produce Enriched ^(10)B Methylborate

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Transactions of tianjin university 2016年第2期22卷 139-143页

The relation of boron trifluoride concentration with conductivity in boron trifluoride methanol solution(BF_3-CH_3OH)was power exponent fitted in low concentration range. The kinetics of the reaction between boron trifluoride methanol complex and sodium methoxide to produce enriched ^(10)B methylborate was proposed based on a detailed mechanism study, and was verified by acid-base titration method and conductivity method. It was found that this reaction is first order reaction and the rate constant is 0.022 min^(-1) at 338 K(65 ℃), the activity energy is 65 k J/mol. In addition, it was found that the conductivity method is more feasible to measure the kinetic curve than acid-base titration method.

关键词： boron trifluoride methanol complex sodium methoxide conductivity kinetics

Synthesis of Enriched 10B Boric Acid of Nuclear Grade

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Transactions of tianjin university 2014年第6期20卷 458-462页

作者： Zhang Lei School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China Chemical Engineering Research Center Tianjin UniversityTianjin 300072China

An economic and effective method of preparing enriched 10B boric acid was established by chemical reactionof enriched 10BF3 and CaCO3. A process of boron trifluoride reacting with water was investigated under certainconditions. Calcium carbonate was selected to counteract hydrofluoric acid followed on. Some key operation factorswere investigated, such as temperature, reaction time and the ratio of CaCO3 to 10BF3. The results showed that the yieldof enriched 10B boric acid could reach 97. 2% and the purity was up to 94. 1% under the following conditions： the temperaturewas 50-60,℃, the reaction time was 28 h and the ratio of CaCO3 to 10BF3 was 4. In addition, after recrystallizationand titration analysis, the purity of the product could reach over 99. 2% from 94.1%.

关键词： enriched 10B boric acid boron trifluoride calcium carbonate fluoboric acid hydrogen fluoride

Antimicrobial biomaterials with non-antibiotic strategy

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Biosurface and Biotribology 2019年第3期5卷 71-82页

作者： Xiang Ge Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical EngineerngTianjin UniversityTianjin 300354People's Republic of China

Biomedical implants have revolutionised medicine,while they also increase the risk of implant-associatedinfection which is one of the most frequent and severe complications accpmpanied by the application of *** the widespread usage of antibiotics drives the emergence of multidrug-resistant strains,the orthopaedic implantinfections are usually hard to treat due to the antibiotic resistance,tolerance and/or persistence of *** growing impact of multidrug resistance,an urgent need has been triggered to develop new types of antimicrobialstrategy other than using *** this review,the authors highlight the recent progress on antimicrobialbiomaterials with non-antibiotic strategies including chemical strategy,physical strategy,and synergetic *** antimicrobial mechanisms of many kinds of non-antibiotic antimicrobial biomaterials are still not fully *** gradually found that welcoming microbial cellular adhesion to a lethal surface was a more effectivesolution than targeting microbial cellular repulsion when designing antimicrobial ***,there is a populartendency to make the antimicrobial biomaterials not only kill pathogenic microbes but also facilitate the adhesion andgrowth of the healthy cell,which means that the next generation biomaterials should possess dual functions ofpreventing microbial infection together with promoting tissue regeneration simultaneously for biomedical applications.

关键词： biomaterials designing antibiotics