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Endowing low fatigue for elastocaloric effect by refined hierarchical microcomposite in additive manufactured NiTiCuCo alloy

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International Journal of Extreme Manufacturing 2024年第4期6卷 307-322页

作者： Bo Feng Helong Liu Ying Yang hui Shen Yang Ren Yinong Liu Lishan cui Bingmin Huang Shijie Hao College of New Energy and Materials China University of PetroleumBeijing 102249People's Republic of China College of Chemical Engineering and Environment China University of PetroleumBeijing 102249People's Republic of China Department of Physics City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong Special Administrative Region of ChinaPeople's Republic of China Department of Mechanical Engineering The University of Western AustraliaPerthWA 6009Australia Jiangsu Smart Advanced Material Tech Co. LtdXuzhou 221000People's Republic of China

NiTiCu-based shape memory alloys have been considered as ideal materials for solid-state refrigeration due to their superb cycling stability for elastocaloric ***,the embrittlement and deterioration caused by secondary phase and coarse grains restrict their applications,and it is still challenging since the geometric components are ***,bulk NiTiCuCo parts with excellent forming quality were fabricated by laser powder bed fusion(LPBF)*** as-fabricated alloy exhibits refined three-phases hierarchical microcomposite formed based on the rapid cooling mode of LPBF,composed of intricate dendritic Ti2Ni–NiTi composite and nano Ti2Cu embedded inside the *** configuration endows far superior elastocaloric stability compared to the as-cast *** low fatigue stems from the strong elastic coupling between the interphases with reversible martensite transformation,revealed by in-situ synchrotron high-energy x-ray *** fabrication of NiTiCuCo alloy via LPBF fills the bill of complex geometric structures for elastocaloric NiTiCu *** understanding of interphase micro-coupling could provide the guide for designing LPBF fabricated shape memory-based composites,enabling their applications for special demands on other functionalities.

关键词： NiTiCuCo shape memoryalloy microcomposite high-energyx-raydiffraction laser powderbedfusion

Damage Characteristics Analysis and Fractal Study of Shale With Prefabricated Fractures under Thermal-mechanical Coupling

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 570-586页

作者：张辉邬忠虎 SONG Huailei WANG Wentao TANG Motian cui Hengtao College of Civil Engineering Guizhou UniversityGuiyang 550025China

To study the damage and failure of shale with different fracture inclination angles under uniaxial compression loading,in this work,RFPA2D-Thermal,a two-dimensional real failure process analysis software,was used for numerical *** simulation results show that quartz in shale mainly affects the tensile and compressive strength of shale by increasing rock *** coupling of temperature and pressure will cause lateral and volume destruction of shale,which enables the shale body to be more easily *** inclination is the key factor affecting shale damage *** failure mode of shale with low-and high-angle fractures is mainly shear failure,and the compressive strength does not vary with crack *** damage mode of obliquely intersecting fractured shale is slip damage along the fracture face,the compressive strength decreases and then increases with the fracture inclination,and a minimum value *** acoustic emission simulation results of the damage process effectively reflect the accumulated internal damage and macroscopic crack appearance until fracture instability when the prefabricated fractured shale is subjected to uniaxial compressive *** crack inclinations of 0°and 120℃ corresponds to the most complex"N"shape damage *** crack inclinations of 30°and 60°,and the damage mode is an inverted"λ"shape.

关键词： shale temperature and pressure numerical simulation fracture dip angle fractal dimension

Degradation of o-dichlorobenzene by DBD-NTP co-modified titanium gel catalyst

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Journal of Environmental Sciences 2024年第9期143卷 71-84页

作者： Wenbo Zhang Yi Xing Wei Su Jiaqing Wang Haoqi Jia Yongkang cui Jing Chen hui Zhang School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology BeijingBeijing 100083China Guangdong Province Engineering Laboratory for Air Pollution Control Guangzhou 510530China College of Environmental and Resource Sciences Shanxi UniversityTaiyuan 030006China Sinosteel Maanshan Mine Research Institute Co.Ltd. Anhui 243071China

In order to study the degradation process of dioxins in industrial flue gas,the decomposition of o-dichlorobenzene(o-DCB)in a DBD plasma catalytic reactor was *** results showed that an NTP-catalyzed system,especially using the Cu Mn Ti Oxcatalyst,had better o-DCB degradation performance compared to plasma *** combination of the Cu Mn Ti Oxcatalyst with NTP can achieve a degradation efficiency of up to 97.2%for o-DCB;the selectivity of CO and CO_(2)and the carbon balance were 40%,45%,and 85%,*** dielectric constant and electrical property results indicated that the surface discharge capacity of the catalysts played a major role in the degradation of o-DCB,and a higher dielectric constant could suppress the plasma expansion and enhance the duration of the plasma discharge per discharge *** to the O1s XPS and O_(2)-TPD results,the conversion of CO to CO_(2)follows the M-v-K mechanism;thus,the active species on the catalyst surface play an important ***,the Cu Mn Ti Oxand NTP mixed system exhibited excellent stability,which is probably because Cu doping improved the lifetime of the *** work can provide an experimental and theoretical basis for research in the degradation of o-DCB by plasma catalyst systems.

关键词： o-dichlorobenzene(o-DCB) Non-thermal plasma catalysis Ozone concentration

Groundwater resources survey of tongchuan city using the audio magnetotelluric method

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Applied Geophysics 2020年第5期17卷 660-671,900页

作者： Xu Zhi-min Tang Jing-tian Li Guang Xin hui-cui Xu Zhang-jian Tan Xin-ping LI Jin Heibei Instrument&Meter Engineering Technology Research Center Chengde Petroleum CollegeChengde 067000China School of Geosciences and Info-Physics Central South UniversityChangsha 410083China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education(Central South University)Changsha 410083China Northwest Research Institution of Engineering Investigations and Design Xi’an 710003China School of Geophysics and Measurement-control Technology Nanchang 330013China College of Information Science and Engineering Hunan Normal UniversityChangsha 410081China

The development of Tongchuan City,Shaanxi Province,located in the northwestern region of China,is restricted by water *** direct current resistivity and induced polarization sounding methods are typically applied in finding urban *** methods,however,are not effective due to their complicated topography and geological *** application practice shows that the audio magnetotelluric(AMT)method has a large depth of exploration,high work effi ciency,and high lateral *** investigate the distribution of groundwater resources,we deployed three audio-frequency magnetotelluric profiles in the city *** impedance tensor information of AMT data is obtained using *** data dimension analysis reveals that the two-dimensional structural features of the observation area are *** main structure of the observation area is about 45°northeast,as indicated by structural trend analysis.A shallow two-dimensional electrical profile of 1 km in Tongchuan City is obtained by two-dimensional nonlinear conjugate gradient ***,combined with regional geological information,the geological structure characteristics reflected by the electrical profile were obtained along with the detailed characteristics of water-rich structures in the *** infl uence of the structure on the groundwater distribution was analyzed,and the water-rich areas were identifi *** work contributes to the prospective development of Tongchuan City.

关键词： urban geology audio magnetotelluric sounding method electrical structure groundwater resources

Macroscopic model and statistical model to characterize electromagnetic information of a digital coding metasurface

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National Science Review 2024年第3期11卷 159-171页

作者： Rui Wen Shao Jun Wei Wu Zheng Xing Wang hui Xu Han Qing Yang Qiang Cheng Tie Jun cui Institute of Electromagnetic Space Southeast University State Key Laboratory of Millimeter Waves Southeast University Peng Cheng Laboratory Pazhou Laboratory(Huangpu)

A digital coding metasurface is a platform connecting the digital space and electromagnetic wave space, and has therefore gained much attention due to its intriguing value in reshaping wireless channels and realizing new communication architectures. Correspondingly, there is an urgent need for electromagnetic information theory that reveals the upper limit of communication capacity and supports the accurate design of metasurface-based communication systems. To this end, we propose a macroscopic model and a statistical model of the digital coding metasurface. The macroscopic model uniformly accommodates both digital and electromagnetic aspects of the meta-atoms and predicts all possible scattered fields of the digital coding metasurface based on a small number of simulations or measurements. Full-wave simulations and experimental results show that the macroscopic model is feasible and accurate. A statistical model is further proposed to correlate the mutual coupling between meta-atoms with covariance and to calculate the entropy of the equivalent currents of digital coding metasurface. These two models can help reconfigurable intelligent surfaces achieve more accurate beamforming and channel estimation, and thus improve signal power and coverage. Moreover, the models will encourage the creation of a precoding codebook in metasurface-based direct digital modulation systems, with the aim of approaching the upper limit of channel capacity. With these two models, the concepts of current space and current entropy, as well as the analysis of information loss from the coding space to wave space, is established for the first time, helping to bridge the gap between the digital world and the physical world, and advancing developments of electromagnetic information theory and new-architecture wireless systems.

关键词： electromagnetic information theory current entropy current space digital coding metasurface macroscopic model statistical model

胰十二指肠切除术手术部位感染危险因素及耐药性分析

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中国现代普通外科进展 2024年第8期27卷 652-655页

作者：孟葳王楠徐建威李伟苏欣单慧翠董艳艳山东大学齐鲁医院医院感染管理处山东济南250012 山东大学齐鲁医院普通外科山东济南250012 山东大学齐鲁医院检验科山东济南250012

探讨开腹胰十二指肠切除术(OPD)发生手术部位感染的危险因素及病原菌耐药情况,指导手术部位感染防控及抗菌药物合理应用。收集2019年1月至2022年12月675例在我院接受OPD患者的临床资料,采用病例对照分析方法,回顾性调查42例感染者和42... 详细信息

探讨开腹胰十二指肠切除术(OPD)发生手术部位感染的危险因素及病原菌耐药情况,指导手术部位感染防控及抗菌药物合理应用。收集2019年1月至2022年12月675例在我院接受OPD患者的临床资料,采用病例对照分析方法,回顾性调查42例感染者和42例未感染者,采用单因素和多因素的非条件Logistic回归进行危险因素分析。BMI≥24(OR=3.745,95%CI:1.164~12.045)、手术时长>75百分位数(335 min,OR=4.588,95%CI:1.109~18.988)两个因素是发生手术部位感染的独立危险因素(P75百分位数(335 min)等两个因素为OPD术后发生手术部位感染的独立危险因素,应据此制定有效预防控制措施;如发生感染,应根据病原特点及药敏试验结果针对性地使用抗菌药物。

关键词：胰十二指肠切除术手术部位感染危险因素药敏试验

Yang cycle enzyme DEP1: its moonlighting functions in PSI and ROS production during leaf senescence

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Molecular Horticulture 2022年第1期2卷 133-148页

作者： Chu-Kun Wang Xiu-Ming Li Fang Dong cui-hui Sun Wen-Li Lu Da-Gang Hu National Key Laboratory of Crop Biology MOA Key Laboratory of Horticultural Crop Biology and Germplasm InnovationCollege of Horticulture Science and EngineeringShandong Agricultural UniversityTai’an 271018ShandongChina Shandong Institute of Pomology Key Laboratory for Fruit Biotechnology Breeding of ShandongTai’an 271000ShandongChina

Ethylene-mediated leaf senescence and the compromise of photosynthesis are closely associated but the underlying molecular mechanism is a *** we reported that apple DEHYDRATASE-ENOLASE-PHOSPHATASE-COMPLEX1(MdDEP1),initially characterized to its enzymatic function in the recycling of the ethylene precursor SAM,plays a role in the regulation of photosystem I(PSI)activity,activating reactive oxygen species(ROS)homeostasis,and negatively regulating the leaf senescence.A series of Y2H,Pull-down,CO-IP and Cell-free degradation biochemical assays showed that MdDEP1 directly interacts with and dephosphorylates the nucleus-encoded thylakoid protein MdY3IP1,leading to the destabilization of MdY3IP1,reduction of the PSI activity,and the overproduction of ROS in plant *** findings elucidate a novel mechanism that the two pathways intersect at MdDEP1 due to its moonlighting role in destabilizing MdY3IP1,and synchronize ethylene-mediated leaf senescence and the compromise of photosynthesis.

关键词： DEHYDRATASE-ENOLASE-PHOSPHATASE-COMPLEX1 Yang cycle Photosystem I ROS Leaf senescence Photosynthesis

Influence of the initial electronic state on minima of high-order harmonic spectrum radiated from hydrogen molecular ion

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Influence of the initial electronic state on minima of high-...

The 13-atom encapsulated gold cage clusters

第七届全国计算原子与分子物理学术会议

作者： hui-Fang cui Xiang-Yang Miao College of Physics and Information Engineering Shanxi Normal University

We theoretically investigate the high-order harmonic generation of the one-dimensional hydrogen molecular ion at fixed intermediate internuclear distance,driven by a multicycle laser field. Our results show that the initial electronic state of the hydrogen molecular ion affects the modulation of the high-order harmonic spectrum,especially the positions of the minima. Based on the two-state model, the underlying physical mechanism of the minimum is analyzed and discussed. Further analysis shows that the different positions of the minima in the different initial electronic states can be understood via the different interferences of the two phase-adiabatic states at the ionization times.

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Chinese Physics B 2012年第10期21卷 201-205页

作者：张川晖崔航申江 Institute of Applied Physics University of Science and Technology Beijing

The structure and the magnetic moment of transition metal encapsulated in a Au 12 cage cluster have been studied by using the density functional *** results show that all of the transition metal atoms（TMA） can embed into the Au 12 cage and increase the stability of the clusters except *** of them have the I h or O h *** curves of binding energy have oscillation characteristics when the extra-nuclear electrons increase;the reason for this may be the interaction between parity changes of extra-nuclear electrons and Au *** curves of highest occupied molecular orbital-lowest unoccupied molecular orbital（HOMO-LUMO） gap also have oscillation characteristics when the extra-nuclear electrons *** binding energies of many M@Au 12 clusters are much larger than that of the pure Au 13 cluster,while the gaps of some of them are less than that of Au 13,so maybe Cr@Au 12,Nb@Au 12,and W@Au 12 clusters are most stable in *** magnetic calculations,some clusters are quenched totally,but the Au 13 cluster has the largest magnetic moment of 5 μ *** the number of extra-nuclear electrons of the encapsulated TMA is even,the magnetic moment of relevant M@Au 12 cluster is even,and so are the odd ones.

关键词： cluster icosahedral cuboctahedral fullerenes