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Performance-control-orientated hybrid metal additive manufacturing technologies:state of the art,challenges,and future trends

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International Journal of Extreme Manufacturing 2024年第3期6卷 274-328页

作者： Jiming Lv Yuchen Liang Xiang Xu Gang Xu Hongmei Zhang Haifei lu Kaiyu luo jie Cai Jinzhong lu School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003People’s Republic of China

Metal additive manufacturing(AM)technologies have made significant progress in the basic theoretical field since their invention in the ***,performance instability during continuous processing,such as thermal history,residual stress accumulation,and columnar grain epitaxial growth,consistently hinders their broad application in standardized industrial *** overcome these challenges,performance-control-oriented hybrid AM(HAM)technologies have been *** technologies,by leveraging external auxiliary processes,aim to regulate microstructural evolution and mechanical properties during metal *** paper provides a systematic and detailed review of performance-control-oriented HAM technology,which is categorized into two main groups:energy field-assisted AM(EFed AM,***,electromagnetic,and heat)technologies and interlayer plastic deformation-assisted AM(IPDed AM,*** shock peening,rolling,ultrasonic peening,and friction stir process)*** review covers the influence of external energy fields on the melting,flow,and solidification behavior of materials,and the regulatory effects of interlayer plastic deformation on grain refinement,nucleation,and ***,the role of performance-control-oriented HAM technologies in managing residual stress conversion,metallurgical defect closure,mechanical property improvement,and anisotropy regulation is thoroughly reviewed and *** review concludes with an analysis of future development trends in EFed AM and IPDed AM technologies.

关键词： hybrid additive manufacturing in-situ/interlayer plastic deformation auxiliary energy fields microstructure customization mechanical properties enhancement

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Effect of moxibustion on expression profile of miRNAs in Tripterygium glycoside-induced decreased ovarian reserve

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Journal of Traditional Chinese Medicine 2024年第4期44卷 745-752页

作者： SHEN jie YIN Yaoli LI Hongxiao lu Ge ZHU Yaoyao QIN Yantong JIN Xun CHENG jie SHEN Meihong College of Acupuncture and Tuina Nanjing University of Chinese MedicineNanjing 210023China

OBJECTIVE:To explore the possible regulatory mechanism of microRNA(miRNA)in moxibustion treatment for decreased ovarian reserve(DOR).METHODS:The DOR model was constructed by intragastrical Tripterygium glycoside suspension administration,and moxibustion therapy was simultaneously *** morphological ovarian changes were observed by hematoxylin and eosin *** miRNA expression profile was detected by RNA sequencing,and bioinformatics analysis was *** software 3.6.1 was used to establish a regulatory network and differentially expressed miRNAs were verified by reverse transcription quantitative polymerase chain reaction(RT-qPCR).RESULTS:Decreased number of mature follicles,increased atresia follicles,and abnormal granulosa cell morphology were observed in the model group compared with the control *** moxibustion group demonstrated increased mature follicles,decreased atretic follicles,and significantly decreased abnormal morphology of granulosa cells compared with the model ***,RNA sequencing results manifested significantly up-regulated miRNA expressions(miR-92b-3p,miR-26-5p_R+1_1ss10TC,miR-206-3p,miR-9993b-3p_1ss6GA,miR-7857-3p_R-1,miR-219a-2-3p_1ss10GC,miR-3968-p5_1ss10AT,and PC-5p-6478_1795)and down-regulated miR-664-2-5p_R+1 in the model group,compared with the control group,and the moxibustion group reversed abnormal disorder levels of these ***,these differentially expressed miRNAs were mainly involved in the phosphatidylinositol-3-kinase/protein kinase B signaling pathway and nuclear factor erythropoietin-2-related factor 2/heme oxygenase 1 signaling ***,network and RT-qPCR verification revealed miR-9993b-3p_1ss6GA as the most critical ***:This experiment proved the effectiveness of moxibustion in improving the ovarian reserve of rats by regulating miRNA expression,especially miR-9993b-3p_1ss6GA.

关键词： ovarian reserve moxibustion microRNAs mechanics

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Multi-user reinforcement learning based task migration in mobile edge computing

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Frontiers of Computer Science 2024年第4期18卷 161-173页

作者： Yuya CUI Degan ZHANG jie ZHANG Ting ZHANG Lixiang CAO lu CHEN Tianjin Key Lab of Intelligent Computing and Novel Software Technology Tianjin University of TechnologyTianjin 300384China School of Internet of Things Engineering Jiangsu Vocational College of Information TechnologyWuxi 214153China School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China School of Sports Economics and Management Tianjin University of SportTianjin 301617China

Mobile Edge Computing(MEC)is a promising *** service migration is a key technology in *** order to maintain the continuity of services in a dynamic environment,mobile users need to migrate tasks between multiple servers in real *** to the uncertainty of movement,frequent migration will increase delays and costs and non-migration will lead to service ***,it is very challenging to design an optimal migration *** this paper,we investigate the multi-user task migration problem in a dynamic environment and minimizes the average service delay while meeting the migration *** order to optimize the service delay and migration cost,we propose an adaptive weight deep deterministic policy gradient(AWDDPG)*** distributed execution and centralized training are adopted to solve the high-dimensional *** show that the proposed algorithm can greatly reduce the migration cost and service delay compared with the other related algorithms.

关键词： mobile edge computing mobility service migration deep reinforcement learning deep deterministic policy gradient

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Piperine regulates the circadian rhythms of hepatic clock gene expressions and gut microbiota in high-fat diet-induced obese rats

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Food Science and Human Wellness 2024年第3期13卷 1617-1627页

作者： Weiyun Zhang Chi-tang Ho Wenlian Wei jie Xiao Muwen lu Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods College of Food ScienceSouth China Agricultural UniversityGuangzhou 510642China Department of Food Science Rutgers UniversityNew Brunswick 08901USA

The interplay between the host circadian clock and microbiota has significant influences on host metabolism processes,and circadian desynchrony triggered by high-fat diet(HFD)is closely related to metabolic *** this study,the modulatory effects of piperine(PIP)on lipid metabolism homeostasis,gut microbiota community and circadian rhythm of hepatic clock gene expressions in obese rats were *** Sprague-Dawley(SD)rats were fed with normal diet(ND),HFD and HFD supplemented with PIP,*** 9 weeks,rats were sacrificed with tissue and fecal samples collected for circadian *** showed that chronic PIP administration ameliorated the obesity-induced alterations in lipid metabolism and dysregulation of hepatic clock gene expressions in obese *** gut microbial communities studied through 16S rRNA sequencing showed that PIP ameliorated the imbalanced nicrobiota and recovered the circadian rhythm of Lactobacillaceae,Desulfovibrionaceae,Paraprevotellaceae,and *** fecal metabolic profiles indicated that 3-dehydroshikimate,cytidine and lithocholyltaurine were altered,which were involved in the amino acid and fatty acid metabolism *** findings could provide theoretical basis for PIP to work as functional food to alleviate the lipid metabolism disorder,circadian rhythm misalignment,and gut microbiota dysbiosis with wide applications in the food and pharmaceutic industries.

关键词： Piperine Circadian clock Obesity Gut microbiota

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Compact magneto-optical traps using planar optics

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Chinese Physics B 2024年第9期33卷 93-108页

作者： Zhi tan Bo lu Chengyin Han Chaohong Lee Institute of Quantum Precision Measurement State Key Laboratory of Radio Frequency Heterogeneous IntegrationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area(Guangdong) Shenzhen 518045China

Magneto-optical traps (MOTs) composed of magnetic fields and light fields have been widely utilized to cool andconfine microscopic particles. Practical technology applications require miniaturized MOTs. The advancement of planaroptics has promoted the development of compact MOTs. In this article, we review the development of compact MOTs basedon planar optics. First, we introduce the standardMOTs. We then introduce the gratingMOTs with micron structures, whichhave been used to build cold atomic clocks, cold atomic interferometers, and ultra-cold sources. Further, we introducethe integrated MOTs based on nano-scale metasurfaces. These new compact MOTs greatly reduce volume and powerconsumption, and provide new opportunities for fundamental research and practical applications.

关键词： magneto-optical trap (MOT) planar optics grating MOT metasurface MOT

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Tungsten pnictides for water electrolysis:advances and perspectives

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Tungsten 2024年第4期6卷 675-695页

作者： Xue Kang Xi-Han tan Ning Han Jian-Feng Hou Chen-Min Yao Zhi-jie Chen Bing-jie Ni Department of Chemistry and Chemical Engineering Lyuliang University Department of Materials Engineering State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration Key Laboratory of Oral Biomedicine Ministry of Education Hubei Key Laboratory of Stomatology School & Hospital of Stomatology Wuhan University School of Civil and Environmental Engineering The University of New South Wales

Hydrogen fuel is recognized as a promising energy carrier for the sustainable development of global energy system and the green hydrogen production via water electrolysis attracts great *** development of cost-effective electrocatalysts for water electrolysis is important for enhancing green hydrogen production ***,tungsten pnictides(phosphides and nitrides) have emerged as promising catalysts for water electrolysis,and efficient tungsten pnictide-based catalysts with different nanostructures,compositions,and surface chemical properties have been *** this review,recent progress in the design of tungsten pnictide-based electrocatalysts for water electrolysis is comprehensively *** synthesis of tungsten pnictide-based electrocatalysts are discussed ***,current achievements in developing efficient tungsten pnictide electrocatalysts for water electrolysis are detailed,and four key catalyst design strategies(i.e.,nanostructure control,heteroatom doping,defect engineering,and heterostructure design) are *** physicochemical properties-catalytic performance relationship of tungsten pnictide-based electrocatalysts is also *** last,perspectives in this field are put forward for guiding further research on the design and application of high-performance tungsten pnictide-based electrocatalysts.

关键词： Electrocatalysts Hydrogen evolution reaction Oxygen evolution reaction Tungsten nitrides Tungsten phosphides

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Nitrogen-doping boosts *CO utilization and H2O activation on copper for improving CO2 reduction to C2+ products

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Green Energy & Environment 2024年第9期9卷 1459-1465页

作者： Yisen Yang Zhonghao tan Jianling Zhang jie Yang Renjie Zhang Sha Wang Yi Song Zhuizhui Su Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Center for Carbon Neutral Chemistry Institute of Chemistry Chinese Academy of Sciences School of Chemical Sciences University of Chinese Academy of Sciences Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

To improve the electrocatalytic transformation of carbon dioxide （CO2） to multi-carbon (C2+) products is of great *** we developed a nitrogen-doped Cu catalyst,by which the maximum C2+Faradaic efficiency can reach 72.7%in flow-cell system,with the partial current density reaching 0.62 A *** in situ Raman spectra demonstrate that the *CO adsorption can be strengthened on such a N-doped Cu catalyst,thus promoting the*CO utilization in the subsequent C–C coupling ***,the water activation can be well enhanced by N doping on Cu *** to the synergistic effects,the selectivity and activity for C2+products over the N-deoped Cu catalyst are much improved.

关键词： Electrocatalytic CO 2 reduction reaction Copper catalyst Doping Multi-carbon products In situ Raman measurement

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Quantum weak force sensing with squeezed magnomechanics

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 23-32页

作者： Qian Zhang jie Wang Tian-Xiang lu Ran Huang Franco Nori Hui Jing Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Theoretical Quantum Physics Laboratory Cluster for Pioneering ResearchRIKENWako-shi 351-0198Japan Center for Quantum Computing RIKENWako-shi 351-0198Japan Department of Physics University of MichiganAnn Arbor 48109-1040USA College of Physics and Electronic Information Gannan Normal UniversityGanzhou 341000China Academy for Quantum Science and Technology Zhengzhou University of Light IndustryZhengzhou 450002China

Cavity magnomechanics,exhibiting remarkable experimental tunability,rich magnonic nonlinearities,and compatibility with various quantum systems,has witnessed considerable advances in recent ***,the potential benefits of using cavity magnomechanical(CMM)systems in further improving the performance of quantum-enhanced sensing for weak forces remain largely *** we show that,by squeezing the magnons,the performance of a quantum CMM sensor can be significantly enhanced beyond the standard quantum limit(SQL).We find that,for comparable parameters,two orders of magnitude enhancement in the force sensitivity can be achieved in comparison with the case without magnon ***,we obtain the optimal parameter regimes of homodyne angle for minimizing the added quantum *** findings provide a promising approach for highly tunable and compatible quantum force sensing using hybrid CMM devices,with potential applications ranging from quantum precision measurements to quantum information processing.

关键词： quantum force sensing cavity magnomechanics magnon Kerr effect

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How Effective are Decentralized Anti-poverty Programs?

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China & World Economy 2024年第4期32卷 85-113页

作者： Shuai Chen Mingda Cheng jie-Sheng tan-Soo China Academy for Rural Development and School of Public Affairs Zhejiang UniversityChina Jiangxi Caitong Supply Chain Financial Group Co. Ltd.Jiangxi Financial Holding Group Co.Ltd.China Lee Kuan Yew School of Public Policy National University of SingaporeSingapore

This study examines the effectiveness of China's National Poor Counties(NPC)program,a decentralized anti-poverty initiative,by analyzing five rounds of individual-level panel data from 1988 to *** impact of two waves of the NPC program(1994 and 2001)is evaluated utilizing a panel fixed-effects regression *** results indicate substantial positive effects,with residents in NPC counties experiencing a 47 percent income increase,3.1 percent higher employment rates,and a 5.7 percent rise in household expenditure from 1988 to 2008,in comparison with non-NPC ***,the program benefited vulnerable populations,dispelling concerns about"elite capture."The study also reveals that evolving policy focus has played a pivotal role in sustaining the effects of the program over *** 1994 round prioritized low-skilled employment,and the 2001 wave emphasized productivity enhancement through skills *** findings highlight the continued efficacy of decentralized anti-povertyefforts.

关键词： decentralization elite capture National Poor Counties program poverty

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Regulation of aqueous electrolyte interface via electrolyte strategies for uniform zinc deposition

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Nano Research 2024年第10期17卷 8678-8693页

作者： Wei Zhong Chaoqiang tan Laixi Li Shichao Zhang Xinyang Wang Hao Cheng Yingying lu Institute of Wenzhou Zhejiang UniversityWenzhou 325006China State Key Laboratory of Chemical Engineering Institute of Pharmaceutical EngineeringCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Zhejiang Huayou Cobalt Company Limited Tongxiang 314500China

Aqueous zinc ion batteries(AZIBs),renowned for their high theoretical energy density,safety,cost-effectiveness and ecofriendliness,offer immense potential in the realm of energy storage and conversion,finding applications in renewable energy and portable ***,the development of AZIBs still faces several challenges related to the electrochemical behavior of zinc anodes in aqueous electrolytes,primarily zinc dendrite formation,which emphasize the critical need for a fundamental understanding of the interfacial phenomena between the electrode and *** review focuses on the three models:the electric double layer(EDL)model,the solvation structure model,and the Zn/electrolyte interface *** guide the design of the electrolyte system in *** models provide a comprehensive understanding of the interactions between the electrode,electrolyte,and the solvated ions in the *** optimizing the salt types,salt concentrations,solvents and additives based on these models,it is possible to enhance the performance of AZIBs,including their energy density,cycle life,and *** review also highlights recent research progress in electrolyte modification of AZIBs for understanding battery behavior,along with perspectives for the direction of further investigations.

关键词： aqueous zinc ion batteries electric double layer solvation structure electrolyte optimization

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