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从四方到立方:高性能太阳能电池的钙钛矿相结构演变

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Science Bulletin 2023年第2期68卷 141-145,M0003页

作者：魏旗梁昊 Yuki Haruta Makhsud Saidaminov 米启兮 Michael Saliba 崔光磊宁志军 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China High Performance Computing Department National Supercomputing Center in ShenzhenShenzhen 200441China Department of Chemistry and Department of electrical&Computer Engineering and Centre for Advanced Materials and Related Technologies(CAMTEC) University of VictoriaVictoria V8P 5C2Canada institute for Photovoltaics University of StuttgartStuttgart 70569Germany Qingdao Industrial Energy Storage research institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China

Crystal structure, which is generally determined by the composition, ionic radius and valence state of constituent elements, plays a significant role in the material’s fundamental properties such as optical, electronic, and mechanical characters. The manipulation of the crystal structure through compositional engineering, and understanding the relationship between crystal structure and properties are essential for the development of materials.

关键词：太阳能电池结构演变钙钛矿相

Status of tissue engineering and regenerative medicine in Iran and related advanced tools: Bioreactors and scaffolds

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Journal of Biomedical Science and Engineering 2012年第4期5卷 217-227页

作者： Anneh Mohammad Gharravi Mahmoud Orazizadeh Mahmoud Hashemitabar Karim Ansari-Asl Salem Banoni Ali Alifard Sina Izadi Cellular and Molecular research Center Department of Anatomical Sciences Faculty of Medicine Ahvaz Jundishapour University of Medical Sciences Ahvaz Iran Computer Engineering Department Engineering Faculty Shahid Chamran University Ahvaz Iran electrical Engineering Department Engineering Faculty Shahid Chamran University Ahvaz Iran mechanical Engineering Department Engineering Faculty Shahid Chamran University Ahvaz Iran

Because of increased need to tissue and organ transplantation, tissue engineering (TE) researches have significantly increased in recent years in Iran. The present study explored briefly the advances in the TE approaches in Iran. Through comprehensive search, we explored main TE components researches include cell, scaffold, growth factor and bioreactor conducted in Iran. The field of TE and regenerative medicine in Iran dates back to the early part of the 1990 decade and the advent of stem cell researches. During past two decades, Iran was one of leader in stem cell research in Middle East. The next major step in TE was application and fabrication of scaffolds for TE in the early 2000s with focused on engineering bone and nerve tissue. Iranian researchers extensively used natural scaffolds in their studies and hybridized natural polymers and inorganic scaffolds. There are many universities and government research institutes are conducting active research on tissue-engineering technologies. Limitations to TE in Iran include property design and validation of bioreactors. In conclusion, in the last few years, fields of tissue engineering and regenerative medicine such as stem cell technology and scaffolds have progressed in Iran, but one of the biggest challenges for TE is bioreactors researches.

关键词： Iran Tissue Engineering Cell Scaffold Signal Bioreactor

Series-parallel Hybrid Vehicle Control Strategy design and Optimization Using Real-valued Genetic Algorithm

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Chinese Journal of mechanical Engineering 2009年第6期22卷 862-868页

作者： XIONG Weiwei YIN Chengliang ZHANG Yong ZHANG Jianlong institute of Automotive Engineering Shanghai Jiao Tong University Shanghai 200240 China

Despite the series-parallel hybrid electric vehicle inherits the performance advantages from both series and parallel hybrid electric vehicle, few researches about the series-parallel hybrid electric vehicle have been revealed because of its complex co nstruction and control strategy. In this paper, a series-parallel hybrid electric bus as well as its control strategy is revealed, and a control parameter optimization approach using the real-valued genetic algorithm is proposed. The optimization objective is to minimize the fuel consumption while sustain the battery state of charge, a tangent penalty function of state of charge（SOC） is embodied in the objective function to recast this multi-objective nonlinear optimization problem as a single linear optimization problem. For this strategy, the vehicle operating mode is switched based on the vehicle speed, and an ＂optimal line＂ typed strategy is designed for the parallel control. The optimization parameters include the speed threshold for mode switching, the highest state of charge allowed, the lowest state of charge allowed and the scale factor of the engine optimal torque to the engine maximum torque at a rotational speed. They are optimized through numerical experiments based on real-value genes, arithmetic crossover and mutation operators. The hybrid bus has been evaluated at the Chinese Transit Bus City Driving Cycle via road test, in which a control area network-based monitor system was used to trace the driving schedule. The test result shows that this approach is feasible for the control parameter optimization. This approach can be applied to not only the novel construction presented in this paper, but also other types of hybrid electric vehicles.

关键词： series-parallel hybrid electric vehicle control strategy design optimization real-valued genetic algorithm

MoS_(2) wrapped MOF-derived N-doped carbon nanocomposite with wideband electromagnetic wave absorption

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Nano research 2022年第7期15卷 5781-5789页

作者： Juhua Luo Mengna Feng Ziyang Dai Chenye Jiang Wei Yao Naixin Zhai School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051China

designing electromagnetic wave absorption(EMWA)materials with wide bandwidth,strong absorption,and light weight is still a great challenge for practical ***,the novel nitrogen doped carbon(NDC)/MoS_(2) composite with rationally designed composition and structure was *** NDC particles were introduced into MoS_(2) nanosheets through the calcination of ZIF-8 precursor and consequent hydrothermal process.A series of characterizations were carried out to investigate the physical properties of the as-prepared *** NDC particles exhibited the shape of rhombic dodecahedron with the size of about 500 nm,which were decorated on flower-shaped MoS_(2) with the size of about 3μ*** the increasing NDC content,the absorbing properties of NDC/MoS_(2) composites increased firstly and then *** features of NDC/MoS_(2) composite including interconnected porous structure,nitrogen dopant,and appropriate electrical conductivity gave rise to the polarization,multiple reflection,multiple scattering,and impedance matching,resulting in the outstanding EMWA *** a filler loading ratio of 30 wt.%,the optimized EMWA property can be achieved when the mass ratio of NDC to MoS_(2) was adjusted to be 1:*** a coating thickness of 3.0 mm,the effective EMWA bandwidth(design of high-performance EMWA and new ideas for future research on wideband EMWA.

关键词： metal organic framework materials nitrogen doped carbon molybdenum disulfide wideband absorption

Advances in high-temperature operatable triboelectric nanogenerator

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SusMat 2024年第3期4卷 1-35页

作者： Ruirui Cao Ying Liu Huilin Li Zhitao Shen Fumin Li Xiaoyong Jia Chong Chen RongLiu Caiqin Luo Wensheng Yang Rongrong Bao Caofeng Pan Henan Key Laboratory of Photovoltaic Materials School of Future TechnologyHenan UniversityKaifengChina CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingChina Engineering research Center for Nanomaterials Henan UniversityKaifengChina institute of Solid State Physics HFIPSChinese Academy of SciencesHefeiChina

The triboelectric nanogenerator(TENG)offers a novel approach to harness mechanical energy continuously and *** has emerged as a leading technology for converting mechanical energy into *** demand for self-powered wearable microelectronics and energy generation in extreme conditions underscores the need for efficient high-temperature operatable TENGs(HTO-TENGs).However,the operating environment temperature not only affects the storage and dissipation of electrons during triboelectrification,leading to decreased output performance of TENG and instability at high temperatures,but also damage to the mechanical stability and effective defects in most tribomaterials,resulting in a further reduction in TENG’s effective output ***,the unstable material properties of the triboelectric layer at high temperatures also restrict the use of the TENG in harsh ***,it is imperative to consider the structural durability and electrical output stability of TENG when applying it in challenging working *** review aims to bridge this gap by providing a comprehensive overview of the current state and research advancements in HTO-TENG for the first ***,this review presents insights into future research prospects and proposes design strategies to facilitate the rapid development of the field.

关键词： electrical output stability harsh environments high-temperature operatable thermionic emission triboelectric nanogenerator

Shear failure behaviors and degradation mechanical model of rockmass under true triaxial multi-level loading and unloading shear tests

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International Journal of Mining Science and Technology 2024年第10期34卷 1385-1408页

作者： Zhi Zheng Ronghua Li Pengzhi Pan Jinghua Qid Guoshao Su Hong Zheng State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Key Laboratory of Disaster Prevention and Structural Safety of Ministry of EducationCollege of Civil Engineering and ArchitectureGuangxi UniversityNanning 530004China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China China Energy Engineering Group Guangxi Electric Power design institute Co.Ltd. Nanning 530007China State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China

The redistribution of three-dimensional(3D)geostress during underground tunnel excavation can easily induce to shear failure along rockmass structural plane,potentially resulting in engineering ***,the current understanding of rockmass shear behavior is mainly based on shear tests under2D stress without lateral stress,the shear fracture under 3D stress is unclear,and the relevant 3D shear fracture theory research is ***,this study conducted true triaxial cyclic loading and unloading shear tests on intact and bedded limestone under different normal stress σ_(n) and lateral stressσ_(p)to investigate the shear strength,deformation,and failure *** results indicate that under differentσ_(n)and σ_(p),the stress–strain hysteresis loop area gradually increases from nearly zero in the pre-peak stage,becomes most significant in the post-peak stage,and then becomes very small in the residual stage as the number of shear test cycles *** shear peak strength and failure surface roughness almost linearly increase with the increase inσ_(n),while they first increase and then gradually decrease asσ_(p)increases,with the maximum increases of 12.9%for strength and 15.1%for *** shear residual strength almost linearly increases withσ_(n),but shows no significant change withσ_(p).Based on the acoustic emission characteristic parameters during the test process,the shear fracture process and microscopic failure mechanism were *** the shear stressτincreases,the acoustic emission activity,main frequency,and amplitude gradually increase,showing a significant rise during the cycle near the peak strength,while remaining almost unchanged in the residual *** true triaxial shear fracture process presents tensile-shear mixture failure characteristics dominated by microscopic tensile *** on the test results,a 3D shear strength criterion considering the lateral stress effect was proposed,and the determination met

关键词： True triaxial shear test Lateral stress effect Acoustic emission monitoring Shear parameters evolution Shear degradation mechanical model

Co-Simulation research of the mechanical-Hydraulic-Control Coupling System of ITER Tractor

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Plasma Science and Technology 2009年第3期11卷 334-340页

作者：杨秀清骆敏舟梅涛姚达毛 institute of Intelligent Machines(IIM) Chinese Academy of Sciences University of Science and Technology of China institute of Plasma Physics Chinese Academy of Sciences

The virtual prototyping models of the mechanical, hydraulic and control system of the ITER tractor were built with CATIA, ADAMS and MATLAB/Simulink respectively according to its heavy load and high precision characteristics, and the data transfer between the different models was accomplished by the integration interface between different software. Consequently the virtual experimental platform for the multi-disciplinary co-simulation was established. A co-simulation study of the mechanical-hydraulic-control coupling system of the ITER tractor was carried out. The synchronization servo control of parallel hydraulic cylinders was implemented, and the tracking control of the preconcerted trajectory of the hydraulic cylinders was realized on the established experimental platform. This paper presents the optimization design and technology rebuilding for the complicated coupling system with its theoretic foundation and co-simulation virtual experimental platform.

关键词： co-simulation mechanical-hydraulic coupling PID control of integral separation hydraulic synchronization servo system

Development of a China test cryomodule for ILC

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Chinese Physics C 2009年第1期33卷 77-80页

作者：徐庆金翟纪元李春华孙毅侯治龙高杰赵同宪熊联友陆文海宗占国刘立强张亮 institute of High Energy Physics Chinese Academy of Sciences Technical institute of Physics and Chemistry Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences

research and development of a 1.3 GHz 9-cell cavity test cryomodule were carried out by a collaboration group between IHEP （institute of High Energy Physics） and TIPC （Technical institute of Physics and Chemistry） in China. The cryomodule is a ＂test model＂ for the ILC cryomodule, and a key component of a superconducting accelerator test unit which will be built in the near future, also can be used as a horizontal test facility for 1.3 GHz 9-cell cavities. This paper presents the development status of the cryomodule, including structure design, cryogenic flow diagram, thermal and mechanical simulations, heat load estimation and etc.

关键词： cryomodule 1.3 GHz cavity ILC test model

Multi-channel DMA Based design of Voltage Monitoring Using Synchronous Frequency Trace-Sampling Technique

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Modern Electronic Technology 2020年第2期4卷 17-20页

作者： Yuan Lei Li Lei Lei Xia Mingxiang Liu Yueming Cai Jingtao Zhao Mengyue Li NARI Group Corporation(State Grid Electric Power research institute) NanjingJiangsu210003China Tianjin Pinggao Intelligent Electric Co.Ltd. Tianjin300251China Nanjing Normal University School of electrical and Automation Engineering NanjingJiangsu210023China

In order to eliminate the influence of frequency change on real-time voltage acquisition,a low-cost solution of voltage monitoring was proposed using the multi-channel DMA synchronous frequency trace-sampling ***-chip resources of the designed voltage monitor were fully utilized in hardware design to reduce external *** MQX RTOS was used to perform the functional tasks flexibly and efficiently;especially the Ethernet communication applications and USB device connection were realized using its TCP/IP protocol stack and USB *** addition,to ensure the safety of electrical records,data statistics and alarm information management were also implemented through the management of the storage in *** test results show that the voltage monitor designed in this paper has the advantages of accurate measurement,strong resistance to frequency interference and low cost,and can be widely applied in the field of voltage monitoring in distribution networks.

关键词： Voltage monitoring DMA Synchronous sampling Frequency tracing-sampling MQX RTOS