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Regulating Thermogalvanic Effect and Mechanical Robustness via Redox Ions for Flexible Quasi‑Solid‑State Thermocells

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Nano-Micro Letters 2022年第5期14卷 153-167页

作者： Peng Peng Jiaqian Zhou Lirong Liang Xuan Huang Haicai Lv Zhuoxin Liu Guangming Chen College of Materials Science and Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China

The design of power supply systems for wearable applications requires both flexibility and durability.Thermoelectrochemical cells(TECs)with large Seebeck coefficient can efficiently convert lowgrade heat into electricity,thus having attracted considerable attention in recent years.Utilizing hydrogel electrolyte essentially addresses the electrolyte leakage and complicated packaging issues existing in conventional liquid-based TECs,which well satisfies the need for flexibility.Whereas,the concern of mechanical robustness to ensure stable energy output remains yet to be addressed.Herein,a flexible quasisolid-state TEC is proposed based on the rational design of a hydrogel electrolyte,of which the thermogalvanic effect and mechanical robustness are simultaneously regulated via the multivalent ions of a redox couple.The introduced redox ions not only endow the hydrogel with excellent heat-to-electricity conversion capability,but also act as ionic crosslinks to afford a dual-crosslinked structure,resulting in reversible bonds for effective energy dissipation.The optimized TEC exhibits a high Seebeck coefficient of 1.43 mV K−1 and a significantly improved fracture toughness of 3555 J m^(−2),thereby can maintain a stable thermoelectrochemical performance against various harsh mechanical stimuli.This study reveals the high potential of the quasi-solid-state TEC as a flexible and durable energy supply system for wearable applications.

关键词： Thermocells Thermoelectric Flexible energy devices Wearable applications Hydrogel electrolytes

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A multi-layer modelling approach for mining versatile ports of a global maritime transportation network

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International Journal of Digital Earth 2023年第1期16卷 2129-2151页

作者： Peng Peng Christophe Claramunt Shifen Cheng Yu Yang Feng Lu State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China Naval Academy Research Institute Brest NavalFrance Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijingPeople’s Republic of China The Academy of Digital China Fuzhou UniversityFuzhouPeople’s Republic of China Jiangsu Center for Collaborative Innovation in Giographical Information Resource Development and Application NanjingPeople’s Republic of China

International ports play critical roles in maintaining transportation flows and sustaining the effectiveness of global maritime logistics.Although the concept of versatile ports has been introduced to represent the specific patterns that these ports play at the regional and global levels,there is still a need for the design and development of computational approaches that support these notions.This paper introduces a flexible multi-layer network approach for an international maritime network whose interest is that it offers a flexible model that favours the identification of the different transportation flows and versatile ports.The model is complemented by a series of structural indices complemented by a new overlap measure that evaluates the specific role of a given port across various transportation trades.The whole approach is implemented and experimented with using massive AIS maritime data that supports the automatic generation of the multi-layer network,and derivation of the structural measures while maintaining a flexible view of the maritime network.The experiments applied to the global maritime transportation network identify key versatile ports and highlight significant differences at the regional and trade flow levels.

关键词： Versatile port multilayer network aggregated network maritime transportation vessel trajectory data

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Spiral Vector Modeling of Brushless Doubly-fed Induction Machines with Short-circuited Rotor Windings

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Chinese Journal of Electrical Engineering 2021年第3期7卷 29-41页

作者： peng Han Ming Cheng Zhiwei Zhang Peng Peng Ansys Inc.San JoseCA 95134USA School of Electrical Engineering Southeast UniversityNanjing 210096China Department of ECE The Ohio State UniversityColumbusOH 43210USA Milwaukee Electric Tool Corporation MilwaukeeWI 53005USA

A unified spiral vector model is presented that can be used to assist the finite element method-based performance analysis of brushless doubly-fed induction machines with various short-circuited rotor windings.Specifically,magnet-free brushless doubly-fed induction machines working in doubly-fed or singly-fed synchronous mode are investigated.A dynamic model in spiral vector notation is developed,based on which the torque-angle and power-angle characteristics are derived.It is shown that the investigated brushless machines are equivalent to a traditional non-salient-pole synchronous machine with brushes.By introducing a conversion factor,they can also be analyzed with methods similar to the conventional phasor theory.A comparison is made between the brushless doubly-fed induction machine and non-salient-pole wound-field synchronous machine with brushes,revealing that the performance of the brushless machine degrades faster when the laminated core is saturated.A scaled-down prototype is tested to validate the effectiveness of the theoretical analysis.

关键词： AC machine brushless machine modeling performance evaluation synchronous machine

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Precambrian mafic dyke swarms in the North China Craton and their geological implications

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Science China Earth Sciences 2015年第5期58卷 649-675页

作者： Peng Peng State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences

A map of major Precambrian mafic dyke swarms and related units in the North China Craton is compiled, and the features and geological implications of these swarms are demonstrated. The Archean dyke swarms are available to portray the early crustal growth and cratonization. The middle Paleoproterozoic(2200–1850 Ma) swarms and related magmatic series could constrain the tectonic evolution: They approve that the craton was amalgamated by two sub-cratons. The late Paleoproterozoic(1800–1600 Ma), Mesoproterozoic(1400–1200 Ma) and Neoproterozoic(1000–800 Ma) series swarms are important in paleogeographic reconstruction: they indicate that North China might have connected with some of the North European and North American cratons during Proterozoic. Dyke swarms are not only geological timescales and tectonic markers but also evolution indicators of lithospheric mantle: they imply a rejuvenation of the sub-continental lithospheric mantle of North China at 1780–1730 Ma. These swarms occurred with several rifts, including the Hengling(2200–1970 Ma), Xuwujia(1970–1880 Ma), Xiong'er(1800–1600 Ma), Yan-Liao(1730–1200 Ma), and Xu-Huai(1000–800 Ma). Among them, the Xuwujia rift was possibly continental arc associated; whereas the others were intra-continental. In addition, the Xiong'er and Xu-Huai rifts were possibly triple junctions along the present southern and southeastern margins of the Craton, respectively. Different tectonic settings of these rifts and dyke swarms would result in diversified series of ore deposits.

关键词：克拉通化中国北方地质意义岩墙群寒武纪大陆岩石圈地幔古元古代构造演化

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Model tests and corresponding numerical simulations on cave model subjected to thermo-mechanical loading

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Underground Space 2022年第2期7卷 162-183页

作者： Peng Peng Hiromasa Iwai Eishi Ohne Yusuke Itani Feng Zhang Department of Civil Engineering Nagoya Institute of TechnologyShowa-kuGokiso-choNagoya 466-8555Japan

Geological repository of high-level nuclear waste(HLNW),the most feasible approach for the safe and permanent treatment of HLNW without human intervention,has been investigated for years by many researchers.In some countries,real facilities for the geo-logical repository are already under construction.In Japan,however,due to complicated geologic conditions,especially underground water and fractured rock masses,and the high risk of natural disasters,ensuring the long-term stability of the method remains a struggle.The influential factors include underground water,heat generation from radioactive waste,and thermal and chemical weathering of the surrounding rock mass as a natural barrier.It is difficult to estimate and verify the long-term stability for up to one hundred thousand years,a complicated thermal-hydraulic-mechanical-chemical coupling behavior,via any field test.The objective of the study is to develop a numerical method for predicting the long-term stability of geological repositories.As the first step toward realizing this objec-tive,heating and loading tests on cave model made of man-made rock specimens that are composed of diatoms,gypsum,and water,which are viscoplastic materials,were conducted,based on which a newly proposed numerical method with finite element method(FEM)was used to describe the thermal,mechanical,and time-dependent behavior of the model tests for a geological repository.To ensure the accuracy of the numerical calculations,all the material parameters in the thermoelasto-viscoplastic model with consideration of overconsolidation,the structure,and the influence of intermediate stress were determined via triaxial compression/creep tests under various temperatures,confining stresses,and loading rates.Finally,the validity of the numerical method was demonstrated by model tests over a limited time span.

关键词： Geological repository High-level nuclear waste Heating and loading test Cave model Thermoelasto-viscoplasticity FEM Long-term stability

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心手相传续绣艺匠心别具谱新章——彭氏蜀绣新时代的活态传承

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现代艺术 2024年第1期 76-79页

作者：彭玲成都彭世平蜀绣文化艺术有限公司

蜀绣又名“川绣”,与苏绣、湘绣、粤绣并称为中国四大名绣。蜀绣针法包括12大类130余种。蜀绣与其他三大绣最大的区别是蜀绣针法更为严谨,讲究籽眼和车拧。而我们运用最多的一大类传统针法“晕针”中的“二三针”则可以充分表现这一点... 详细信息

蜀绣又名“川绣”,与苏绣、湘绣、粤绣并称为中国四大名绣。蜀绣针法包括12大类130余种。蜀绣与其他三大绣最大的区别是蜀绣针法更为严谨,讲究籽眼和车拧。而我们运用最多的一大类传统针法“晕针”中的“二三针”则可以充分表现这一点。二三针,顾名思义每五针为一组,可分解为三针组合和二针组合。三针组合时,每针距离落差三分之一;二针组合时,第一针在“三针组合”的一、二针之间,第二针在“三针组合”的第二、三针之间。

关键词：三针晕针四大名绣三分之一蜀绣针法活态传承

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Software development in the age of intelligence:embracing large language models with the right approach

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Frontiers of Information Technology & Electronic Engineering 2023年第11期24卷 1513-1519页

作者： Xin peng School of Computer Science Fudan UniversityShanghai 200438China

The emergence of large language models(LLMs),represented by ChatGPT,has had a profound impact on various fields,including software engineering,and has also aroused widespread concerns.To see a right way through the fog,we have recently been discussing and contemplating a theme of“software development in the age of LLMs,”or rather“the capability of LLMs in software development,”based on various technical literature,shared experiences,and our own preliminary explorations.

关键词： Software software approach

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Fracture propagation laws of staged hydraulic fracture in fractured geothermal reservoir based on phase field model

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International Journal of Coal Science & Technology 2023年第4期10卷 128-138页

作者： Genbo peng School of Environment Liaoning UniversityShenyang 110036China

Hydraulic fracturing is widely used in geothermal resource exploitation, and many natural fractures exist in hot dry rock reservoirs due to in-situ stress and faults. However, the infuence of natural fractures on hydraulic fracture propagation is not considered in the current study. In this paper, based on the phase feld model, a thermo-hydro-mechanical coupled hydraulic fracture propagation model was established to reveal the infuence of injection time, fracturing method, injection fow rate, and natural fracture distribution on the fracture propagation mechanism. The results show that fracture complexity increases with an increase in injection time. The stress disturbance causes the fracture initiation pressure of the second cluster signifcantly higher than that of the frst and third clusters. The zipper-type fracturing method can reduce the degree of stress disturbance and increase fracture complexity by 7.2% compared to simultaneous hydraulic fracturing. Both low and high injection fow rate lead to a decrease in fracture propagation time, which is not conducive to an increase in fracture complexity. An increase in the natural fracture angle leads to hydraulic fracture crossing natural fracture, but has a lesser efect on fracture complexity. In this paper, we analyzed the infuence of diferent factors on initiation pressure and fracture complexity, providing valuable guidance for the exploitation of geothermal resources.

关键词： Hot dry rock Enhanced geothermal system Phase feld model Fracture propagation

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Effects of cooling rate on microstructure and microhardness of directionally solidified Galvalume alloy

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China Foundry 2024年第3期21卷 213-220页

作者： Ji-peng Li De-gao Qiao Jian Li Xiao-yang Luo Peng Peng Xian-tao Yan Xu-dong Zhang Gansu Jiu Steel Group Hongxing Iron and Steel Co. Ltd.Jiayuguan 735111GansuChina School of Materials and Energy Lanzhou UniversityLanzhou 730000China

The influences of cooling rate on the phase constitution,microstructural length scale,and microhardness of directionally solidified Galvalume(Zn-55Al-1.6Si)alloy were investigated by directional solidification experiments at different withdrawal speeds(5,10,20,50,100,200,and 400μm·s^(-1)).The results show that the microstructure of directionally solidified Galvalume alloys is composed of primary Al dendrites,Si-rich phase and(Zn-Al-Si)ternary eutectics at the withdrawal speed ranging from 5 to 400μm·s^(-1).As the withdrawal speed increases,the segregation of Si element intensifies,resulting in an increase in the area fraction of the Si-rich phase.In addition,the primary Al dendrites show significant refinement with an increase in the withdrawal speed.The relationship between the primary dendrite arm spacing(λ_(1))and the thermal parameters of solidification is obtained:λ_(1)=127.3V^(-0.31).Moreover,as the withdrawal speed increases from 5 to 400μm·s^(-1),the microhardness of the alloy increases from 90 HV to 151 HV.This is a combined effect of grain refinement and second-phase strengthening.

关键词： Galvalume alloy directional solidification microstructure length scale microhardness

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才子彭端淑:其人其书及其学

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地域文化研究 2022年第5期 46-52页

作者：彭华四川大学古籍整理研究所四川成都610064

彭端淑(1699-1779),四川丹棱人,著名文学家、蜀中知名教育家,与李调元、张问陶并称为清代四川“三大才子”。彭端淑著有《白鹤堂文稿》《白鹤堂诗稿》《白鹤堂诗话》《白鹤堂晚年自订诗稿》等,编有《曹植以下八家诗选》《蜀名家诗抄》... 详细信息

彭端淑(1699-1779),四川丹棱人,著名文学家、蜀中知名教育家,与李调元、张问陶并称为清代四川“三大才子”。彭端淑著有《白鹤堂文稿》《白鹤堂诗稿》《白鹤堂诗话》《白鹤堂晚年自订诗稿》等,编有《曹植以下八家诗选》《蜀名家诗抄》等。彭端淑既是一位正直廉洁、颇有治绩的官吏,又是成就卓著、极负盛名的文学家,而且是痒心教育、育才有成的教育家。《彭端淑诗文集新编新注》以《彭端淑诗文注》为基础,做了补充、新增、新注等工作。

关键词：彭端淑其人其书其学诗文集

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