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Nano-Micro Letters 2024年第9期16卷 247-261页

作者： ting‑ting liu Qi Zheng Wen‑Qiang Cao Yu‑Ze Wang Min Zhang Quan‑Liang Zhao Mao‑Sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Department of Physics Beijing Technology and Business UniversityBeijing 100048People’s Republic of China School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144People’s Republic of China

With the diversified development of big data,detection and precision guidance technologies,electromagnetic(EM)functional materials and devices serving multiple spectrums have become a hot *** the multispectral response of materials is a challenging and meaningful scientific *** this study,MXene/TiO_(2)hybrids with tunable conduction loss and polarization relaxation are fabricated by in situ atomic reconstruction *** importantly,MXene/TiO_(2)hybrids exhibit adjustable spectral responses in the GHz,infrared and visible spectrums,and several EM devices are constructed based on *** antenna array provides excellent EM energy harvesting in multiple microwave bands,with|S11|up to−63.2 dB,and can be tuned by the degree of *** ultra-wideband bandpass filter realizes a passband of about 5.4 GHz and effectively suppresses the transmission of EM signals in the *** infrared stealth device has an emissivity of less than 0.2 in the infrared spectrum at wavelengths of 6-14μ*** work can provide new inspiration for the design and development of multifunctional,multi-spectrum EM devices.

关键词： Graphene-like MXene hybrids Multi-spectral response Multi-function antenna Ultra-wideband bandpass filter Electromagnetic device

Effect of Ti Particles on the Microstructure and Mechanical Properties of AZ91 Magnesium Matrix Composites

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Acta Metallurgica Sinica(English Letters) 2024年第3期37卷 513-524页

作者： Lu Xiao ting-ting liu Yue Chu Bo Song Jie Zhao Xian-Hua Chen Kai-Hong Zheng Fu-Sheng Pan College of Materials Science and Engineering Chongqing UniversityChongqing 400044China lntelligent Manufacturing and Automobile School Chongqing College of Electronic EngineeringChongqing 401331China School of Materials and Energy Southwest UniversityChongqing 400715China Science and Technology Research Institute of CNNC 404 Co.LTD Gansu 735100China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China

Spherical micro-Ti particle(TiP)-reinforced AZ91 magnesium alloy composites were fabricated by semi-solid stirring assisted ultrasonic vibration,which were then subjected to hot *** microstructure results showed that the addition of Ti particles refined the grain size and decreased the texture intensity of the as-extruded AZ91 *** Al3Ti phase with a thickness of 100 nm formed at the Ti/Mg interface,which had a non-coherent relationship with the magnesium *** as-extruded 1 vol.%TiP/AZ91 composite exhibited the best comprehensive mechanical properties,with yield strength,ultimate tensile strength,and elongation at break of 366 MPa,456 MPa,and 14.6%,respectively,which were significantly higher than those of the AZ91 ***,the addition of Ti particles can improve the strength and ductility of the AZ91 alloy,demonstrating the value of magnesium matrix composites for commercial applications.

关键词： Magnesium matrix composites Ti particles Interface Mechanical properties

Personalized and continuous care intervention affects rehabilitation,living quality,and negative emotions of patients with breast cancer

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World Journal of Psychiatry 2024年第6期14卷 876-883页

作者： Ling-Xia Kong Yan-Hong Zhao Zhi-Lin Feng ting-ting liu Department of Breast Surgery The First Affiliated Hospital of Hebei North UniversityZhangjiakou 075000Hebei ProvinceChina Operating Room The First Affiliated Hospital of Hebei North UniversityZhangjiakou 075000Hebei ProvinceChina

BACKGROUND Breast cancer is among the most common malignancies *** progress in treatment methods and levels,the overall survival period has been prolonged,and the demand for quality care has *** To investigate the effect of individualized and continuous care intervention in patients with breast *** Two hundred patients with breast cancer who received systemic therapy at The First Affiliated Hospital of Hebei North University(January 2021 to July 2023)were retrospectively selected as research *** them,134 received routine care intervention(routing group)and 66 received personalized and continuous care(intervention group).Self-rating anxiety scale(SAS),self-rating depression scale(SDS),and Functional Assessment of Cancer Therapy-Breast(FACT-B)scores,including limb shoulder joint activity,complication rate,and care satisfaction,were compared between both groups after *** SAS and SDS scores were lower in the intervention group than in the routing group at one and three months after *** total FACT-B scores and five dimensions in the intervention group were higher than those in the routing group at three months of *** range of motion of shoulder anteflexion,posterior extension,abduction,internal rotation,and external rotation in the intervention group was higher than that in the routing group one month after *** incidence of postoperative complications was 18.18%lower in the intervention group than in the routing group(34.33%;Pting group(78.36%;P<0.05).CONCLUSION Personalized and continuous care can alleviate negative emotions in patients with breast cancer,quicken rehabilitation of limb function,decrease the incidence of complications,and improve living quality and care satisfaction.

关键词： Breast cancer Personalized care Continuous care Negative emotions Living quality Rehabilitation effect

Selective synthesis of heteroleptic PdAB-cages: modulating size-preference of supramolecular hosts via endo-functionalization

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Science China Chemistry 2024年

作者： Wen-Tao Dai ting-ting liu Qixia Bai Zhe Zhang Pingshan Wang Wei Lu Qi Zhang Key Laboratory of Green Chemistry and Technology of Ministry of Education College of Chemistry Sichuan University Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of Education Guangzhou University

The size complementarity between a host and a guest is a critical prerequisite for selective molecular recognition. Numerous artificial host systems have been designed to achieve size-selective recognition and chemical transformations. However, the inherent challenge lies in the fixed selectivity governed by a size-exclusion mechanism dictated by the host’s *** the selectivity necessitates structural modifications of hosts. Examples of host systems with modifiable sizeselectivity are rare. In this study, we present an approach to modulating guest-selectivity via endo-functionalization of supramolecular cavities. Heteroleptic Pd2A3B-cages are constructed with a Pd2A3precursor or directly from palladium ions and relevant ligands. Furthermore, the simultaneous and selective formation of multiple hetero-cages was achieved by simply mixing PdIIand the free ligands in a one-pot reaction. The fidelity of the assembly process relies on cooperative steric control at the periphery and within the cavity of the hetero-cages, respectively. The central steric group also functions as the endohedral moiety. Variations of the endohedral groups facilitate facile and modular derivatization of the microenvironment within the cages, enabling the fine-tuning of guest binding affinities as evidenced by titration experiments. This strategy offers a new solution for the development of customized host structures.

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通过添加微量Mn元素激活非基面滑移提高镁合金塑性

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 504-518页

作者：周世博刘婷婷汤爱涛时慧敬学锐彭鹏章建跃潘复生重庆大学材料科学与工程学院重庆400044 Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck-Straße 1D-21502GeesthachtGermany 西南大学材料与能源学院重庆400715 重庆大学镁合金国家工程研究中心重庆400044 重庆科技学院冶金和材料工程学院重庆401331 Department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA

分析微量锰添加对镁合金显微组织和力学性能的影响。采用电子背散射技术、迹线分析、透射电镜和粘塑性自洽模拟等方法研究变形过程中的塑性变形机理。结果表明:Mn的加入使Mg−Mn合金的平均晶粒尺寸由28.30μm减小到5.10μm;同时,随着Mn... 详细信息

分析微量锰添加对镁合金显微组织和力学性能的影响。采用电子背散射技术、迹线分析、透射电镜和粘塑性自洽模拟等方法研究变形过程中的塑性变形机理。结果表明:Mn的加入使Mg−Mn合金的平均晶粒尺寸由28.30μm减小到5.10μm;同时,随着Mn含量的增加,样品的断裂伸长率由14.33%提高到20.33%,屈服强度则由84 MPa提高到180 MPa。这种同时提高塑性和强度的原因是基面滑移和非基面滑移之间的临界剪切应力差从173 MPa减小到115 MPa,导致非基面滑移活动明显增加。通过微合金元素调整滑移系统差异为开发具有高强度和延展性的镁合金提供了一种途径。

关键词：镁合金显微组织演变力学性能塑性变形机理

Impact of oxygen supply on production of terpenoids by microorganisms: State of the art

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Chinese Journal of Chemical Engineering 2021年第2期34卷 46-53页

作者： ting-ting liu Han Xiao Jian-Hui Xiao Jian-Jiang Zhong State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental SciencesLaboratory of Molecular Biochemical Engineering and Advanced Fermentation TechnologyDepartment of BioengineeringSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Zunyi Municipal Key Laboratory of Medicinal Biotechnology Center for Translational MedicineAffiliated Hospital of Zunyi Medical UniversityZunyi 563003China

Terpenoids are a class of high value-added natural products with a variety of biological *** engineered microorganisms,such as those of Escherichia coli and Saccharomyces cerevisiae,have merits in producing plant or fungus-derived terpenoids,due to their mature genetic manipulation,simple nutrient demand and fast ***,as a key environmental factor,is particularly important to microbial metabolism and growth,and suitable oxygen supply is viewed as a prerequisite for realizing highly efficient production of terpenoids by engineered *** this article,the role of oxygen in regulating terpenoid bioproduction is overviewed from the viewpoints of cellular carbon metabolism,energy metabolism and terpenoid *** on adjusting oxygen availability to microorganisms,including genetic modification of cellular metabolism related with oxygen utilization,are summarized and discussed,to provide helpful information for further improvement of terpenoid biosynthesis by microbes.

关键词： Terpenoid Microorganisms Oxygen supply Chassis modification

In Situ Elimination of Pores During Laser Powder Bed Fusion of Ti–6.5Al–3.5Mo–l.5Zr–0.3Si Titanium Alloy

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Acta Metallurgica Sinica(English Letters) 2022年第3期35卷 439-452页

作者： Ling Zhang Wen-He Liao ting-ting liu Hui-Liang Wei Chang-Chun Zhang School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094.China

The printing quality of components manufactured using laser powder bed fusion(LPBF)generally depends on the presence of various defects such as massive ***,the efficient elimination of pores is an important factor in the production of a sound LPBF *** this study,the efficacy of two in situ laser remelting approaches to eliminating pores during the LPBF of a titanium alloy Ti–6.5 Al–3.5 Mo–l.5 Zr–0.3 Si(TC11)was assessed both experimentally and *** two remelting methods are surface remelting and layer-by-layer printing and remelting.A multi-track multi-layer phenomenological model was established to analyze the variation of pores with the temperature and velocity *** results showed that surface remelting with a high laser power,such as 180 W,can eff ectively eliminate pores within three deposited ***,such remelting could not reach defects in deeper ***-by-layer remelting with a 180 W laser could eff ectively eliminate the pores formed in the previous layer in real *** results obtained in this study can provide useful guidance for the in situ control of printing defects supported by real-time monitoring,feedback,and operating systems of an intelligent LPBF equipment.

关键词： Laser powder bed fusion Ti–6.5Al–3.5Mo–l.5Zr–0.3Si Pores Laser remelting

Green building materials lit up by electromagnetic absorption function:A review

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Journal of Materials Science & Technology 2022年第17期112卷 329-344页

作者： ting-ting liu Mao-Qing Cao Yong-Sheng Fang Yu-Hang Zhu Mao-Sheng Cao School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Heilongjiang Institute of Construction Technology Harbin 150025China

Healthy and livable living environments,as well as anti-electromagnetic(EM)radiation buildings,are the long-term goals of human *** introduction of advanced EM wave absorbing materials into buildings is one of the most feasible ways to address the increasing EM pollution in building ***-efficiency,broadband,low-cost and good building performance EM wave absorbing materials,as an important support in the field of sustainable building,has gradually become the hotspot ***,we review the research progress of building materials with EM wave absorption functions,and comb their classification,including cement,concrete,ceramics,and prefabs,especially highlighting the advanced coating *** objectively outline and evaluate the latest technology of building materials with EM wave absorption performance,and discuss the main problems and bottlenecks,highlighting potential research opportunities.

关键词： Anti-electromagnetic radiation building Electromagnetic wave absorption Building materials Green building

Domain wall dynamics driven by a circularly polarized magnetic field in ferrimagnet:effect of Dzyaloshinskii-Moriya interaction

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Rare Metals 2022年第11期41卷 3815-3822页

作者： ting-ting liu Yi-Fei Hu Yang liu Zhe-Jun-Yu Jin Zheng-Hua Tang Ming-Hui Qin Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China School of Physics and Electronic and Electrical Engineering Xiangnan UniversityChenzhou423000China

In this work,we study the domain wall motion in ferrimagnet driven by a circularly polarized magnetic field using the collective coordinate theory and atomistic micromagnetic simulations,and we pay particular attention to the effect of Dzyaloshinskii-Moriya interaction(DMI).Similar to the case of antiferromagnetic domain wall,ferrimagnetic wall moves at a speed which is linearly dependent on the DMI *** addition,it is revealed that the DMI plays a role in modulating the domain wall dynamics similar to that of the net spin density,which suggests another internal parameter for controlling domain wall in ***,the results show that the domain wall dynamics in ferrimagnets is much faster than that in ferromagnets,which confirms again the great potential of ferrimagnets in future spintronic applications.

关键词： Domain wall dynamics Spintronics Circularly polarized magnetic field Ferrimagnets

Transformation and migration of phosphorus in excess sludge reduction pretreatment by alkaline ferrate oxidation combined with anaerobic digestion

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Journal of Environmental Sciences 2020年第6期32卷 224-234页

作者： Xiang Li Yan Yuan Yong Huang Chao-ran Guo Run Jin ting-ting liu Jun Ma School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology Suzhou 215009China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

Recently,more and more attention has been paid to the strong oxidation ability of newly prepared potassium ferrate(NAPF) in sludge reduction process,but less attention has been paid to the change of phosphorus in this *** feasibility of phosphorus migration and transformation during excess sludge reduction pretre atment using NAPF pre-oxidation combined with anaerobic digestion was *** 70 mg/g suspended solids NAPF pretreatment and 16 days anaerobic digestion,the solid-phase volatile suspended solids decreased by 44.2%,and much organic matter had been released into the liquid-phase and then degraded during digestion by indigenous *** the sludge pre-oxidation process was performed,solid-phase organic phosphorus and chemically combined phosphorus also released into the liquid-phase as PO4^3-,peaking at 100 mg/*** anaerobic digestion,the Fe3+in the liquid-phase was gradually reduced to Fe2+,and then formed Fe^2+-PO4^3- compound crystals and re-migrated to the *** concentration of PO4^3- decreased to 17.08± 1.1 mg/L in the liquid-phase after anaerobic ***,the phosphorus in the Fe^2+-PO4^3- compound accounts for 80% of the total phosphorus in the solid-phase.A large number of vivianite crystals in sludge were ***,this technology not only effectively reduces sludge,but also increases the proportion of PO43-in the sludge in the form of Vivianite.

关键词： Excess sludge Alkaline ferrate(NAPF) pre-oxidation Anaerobic digestion phosphorus Migration and transformation