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Chatter suppression techniques in milling processes:A state of the art review

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Chinese Journal of Aeronautics 2024年第7期37卷 1-23页

作者： Zhenmin li Qinghua SONG Peijian JIN Zhanqiang liU Bing WANG Haifeng ma Key Laboratory of High Efficiency and Clean Mechanical manufacture Ministry of EducationSchool of Mechanical EngineeringShandong UniversityJinan 250061China national Demonstration Center for Experimental Mechanical Engineering Education Shandong UniversityJinan 250061China

Chatter in the machining system can result in a decrease in tool life,poor surface finish,conservative cutting parameters,*** many review papers promoting the understanding and research of this area,chatter suppression techniques are generally discussed within limited pages in the framework of comprehensive chatter-related *** recent years,the developments of smart materials,advanced sensing techniques,and more effective control strategies have led to some new progress in chatter ***,the widely used thin-walled parts present more and more severe machining challenges in their milling *** the above deficiencies,this paper summarizes the current state of the art in milling chatter *** classifications of chatter suppression techniques are proposed according to the working principle and control *** on the new classified framework,the mechanism and comparisons of different chatter suppression strategies are ***,the current challenges and potential tendencies of milling chatter suppression techniques are ***,integration,compactness,adaptability to workpiece geometry,and the collaboration of multiple control methods are predicted to be important trends in the future.

关键词： Active control Chatter suppression Damping Milling Regenerative effect

Aptasensing biosynthesized phosphatidylserine with a AuNPs nanozyme-based colorimetric aptasensor

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Food Science and Human Wellness 2024年第2期13卷 823-829页

作者： Sai Wang Rui ma Chengqiang li ling Zhang Haiyang Zhang Xuehan li Xiangzhao mao Qingdao Key Laboratory of Food Biotechnology College of Food Science and EngineeringOcean University of ChinaQingdao 266404China Key Laboratory of Biological Processing of Aquatic Products China National Light IndustryQingdao 266404China Laboratory for marine Drugs and Bioproducts of Qingdao national Laboratory for marine Science and Technology Qingdao 266237China

Sensitive monitoring of the target products during the biosynthesis process is crucial,and facile analytical approaches are urgently ***,phosphatidylserine(PS)was chosen as the model target,a colorimetric aptasensor was developed for the rapid quantitation in biosynthesis samples.A chimeric aptamer was constructed with two homogeneous original PS *** recognition between the chimeric aptamer and PS results in the desorption of aptamer from the surface of the AuNPs nanozyme,and the peroxidase-like enzymatic activity of the AuNPs nanozyme was weakened in a relationship with the different *** developed aptasensor performed well when applied for analyzing PS in biosynthesis *** aptasensor offers good sensitivity and selectivity,under optimal conditions,achieving monitoring and quantitation of PS in the range of 2.5-80.0μmol/L,with a limit of detection at 536.2 nmol/***,the aptasensor provides good accuracy,with comparison rates of 98.17%-106.40%,when compared with the *** study provides a good reference for monitoring other biosynthesized products and promoting the development of aptamers and aptasensors in real-world applications.

关键词： Phosphatidylserine Chimeric aptamer AuNPs nanozyme Colorimetric aptasensor

Simulation of nuclear isomer production in laser-induced plasma

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matter and Radiation at Extremes 2024年第5期9卷 1-9页

作者： Zhiguo ma Yumiao Wang Yi Yang Youjing Wang Kai Zhao Yixin li Changbo Fu Wanbing He Yugang ma Key Laboratory of Nuclear Physics and Ion-Beam Application(MoE) Institute of Modern PhysicsFudan UniversityShanghai 200433China

Nuclear isomers play essential roles in various fields,including stellar nucleosynthesis,nuclear clocks,nuclear batteries,clean nuclear energy,and-ray *** technological advances in high-intensity lasers have made it possible to excite or de-excite nuclear isomers using table-top laser *** a particle-in-cell code,we investigate the interaction of a laser with a nanowire array and calculate the production rates of the^(73m)Ge(E_(1)=13.3 keV)and^(107m)Ag(E_(1)=93.1 keV)***^(73m1)Ge,production by Coulomb excitation is found to contribute a peak efficiency of 1.0×10^(19) particles s^(−1)J^(−1),while nuclear excitation by electron capture(NEEC)contributes a peak of 1.65×10^(11)particles s^(−1)J^(−1).These results indicate a high isomeric production ratio,as well as demonstrating the potential for confirming the existence of NEEC,a long-expected but so far experimentally unobserved fundamental process.

关键词： process. isomers excitation

Laboratory and numerical modelling of irrigation infiltration and nitrogen leaching in homogeneous soils

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Pedosphere 2024年第1期34卷 146-158页

作者： Lei WU Ruizhi li Yan WANG Zongjun GUO Jiaheng li Hang YANG Xiaoyi ma Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas Ministry of EducationNorthwest A&F UniversityYangling 712100China Blackland Research and Extension Center Texas A&M AgriLife ResearchTexas A&M UniversityTemple TX 76502USA State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Northwest A&F UniversityYangling 712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China

Nitrogen (N) plays a key role in crop growth and production;however,data are lacking especially regarding the interaction of biochar,grass cover,and irrigation on N leaching in saturated soil *** soil columns with 20-cm diameter and 60-cm height were designed to characterize the effects of different grass cover and biochar combinations,i.e.,bare soil+0%biochar (control,CK),perennial ryegrass+0%biochar (C1),Festuca arundinacea+0%biochar (C2),perennial ryegrass+1%biochar (C3),perennial ryegrass+2%biochar (C4),perennial ryegrass+3%biochar (C5),***+1%biochar (C6),***+2% biochar (C7),and ***+3%biochar (C8),on periodic irrigation infiltration and N leaching in homogeneous loess soils from July to December *** in CK were 10.2%–35.3%higher than those in C1 and *** perennial ryegrass and *** decreased the volumes of leachates and delayed the leaching process in the 1%,2%,and 3%biochar treatments,and the vertical leaching rate decreased with biochar *** N leaching losses were concentrated in the first few leaching tests,and both total N (TN) and nitrate (NO_(3)^(-))-N concentrations in CK and C1–C8 decreased with increasing leaching test *** addition (1%,2%,and 3%) could further reduce the leaching risk of NO_(3)^(-)-N and the NO_(3)^(-)-N loss decreased with biochar ***,compared to 1%biochar,2% biochar promoted the leaching of TN under both grass cover *** N leaching losses in CK,C1,C2,C3,C4,C6,and C7 were primarily in the form of NO_(3)^(-)-*** these treatments,CK,C1,and C2had the highest cumulative leaching fractions NO_(3)^(-)-N (>90%),followed by those in C3,C4,C6,and C7 (>80%).The cumulative leaching fraction of NO_(3)^(-)-N decreased with increasing leaching test times and biochar addition,and 3%biochar addition (i.e.,C5 and C8) reduced it to approximately 50%.The one-dimensional advective-dispersive-reactive transport equation can be used as an effective nume

关键词： leaching loss nitrate nitrogen biochar grass cover analytical modelling

Distribution law and susceptibility of geohazards across a gradient belt of the Western Sichuan Plateau

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Journal of Mountain Science 2024年第6期21卷 1849-1867页

作者： li Tianbin WANG Jianfeng HE Chaoyang MENG Lubo li Chaofei ma Junjie WEI Daqiang College of Environment and Civil Engineering Chengdu University of TechnologyChengdu 610059China State Key Laboratory of Geohazard Prevention and Geo-environment Protection Chengdu University of TechnologyChengdu 610059China

Across a gradient belt of the Western Sichuan Plateau,geohazards have seriously limited economic and social *** to incomplete statistics,15,673 geohazards have been recorded in the study *** order to mitigate the threat of geohazards to human engineering activities in the region,an overall understanding of the distribution pattern of geohazards and susceptibility assessment are *** this paper,a gradient belt of the Western Sichuan Plateau and its zoning criteria were ***,on the basis of relief amplitude,distance to faults,rainfall,and human activities,three indicators of endogenic process were introduced:Bouguer gravity anomaly gradient,vertical deformation gradient,and horizontal deformation ***,the distribution patterns of geohazards were investigated through mathematical statistics and ArcGIS *** randomly selecting 10,449 hazards,a geohazard susceptibility map was generated using the Information Value(IV)***,the IV model was validated against 5224 hazards using the Area Under Curve(AUC)*** results show that 47.6%of the geohazards were distributed in the zone of steep *** showed strong responses to distance to faults,human activities,and annual *** distribution of geohazards in the gradient belt of the Western Sichuan Plateau is more sensitive to vertical internal dynamics factors(such as vertical deformation gradient and Bouguer gravity anomaly gradient)without any apparent sensitivity to horizontal internal dynamics *** areas of high and very-high risk account for up to 32.22%,mainly distributed in the Longmenshan and Anning River *** to the AUC plot,the success rate of the IV model for generating the susceptibility map is 76%.This susceptibility map and geohazard distribution pattern can provide a reference for geological disaster monitoring,preparation of post-disaster emergency measures,and town planning.

关键词： Gradient belt Geohazards Distribution law Bouguer Gravity anomaly gradient Vertical deformation gradient Susceptibility

Insight into the capacity degradation and structural evolution of single-crystal Ni-rich cathodes

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Journal of Energy Chemistry 2024年第8期95卷 68-76,I0003页

作者： Xiaodong Zhang Jiao lin Ersha Fan Qingrong Huang Su ma Renjie Chen Feng Wu li li Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Advanced Technology Research Institute Beijing Institute of TechnologyJinan 250300ShandongChina Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Single-crystal Ni-rich cathodes are a promising candidate for high-energy lithium-ion batteries due to their higher structural and cycling stability than polycrystalline ***,the phase evolution and capacity degradation of these single-crystal cathodes during continuous lithation/delithation cycling remains *** the mapping relationship between the macroscopic electrochemical properties and the material physicochemical properties is ***,we investigate the correlation between the physical-chemical characteristics,phase transition,and capacity decay using capacity differential curve feature identification and in-situ X-ray spectroscopic *** systematically clarify the dominant mechanism of phase evolution in aging *** high cut-off voltages can mitigate the slow kinetic and electrochemical properties of single-crystal *** also find that second-order differential capacity discharge characteristic curves can be used to identify the crystal structure disorder of Ni-rich *** findings constitute a step forward in elucidating the correlation between the electrochemical extrinsic properties and the physicochemical intrinsic properties and provide new perspectives for failure analysis of layered electrode materials.

关键词： Single-crystal cathodes Capacity decay Phase transition Differential capacity analysis

Biomass-derived porous carbon with single-atomic cobalt toward high-performance aqueous zinc-sulfur batteries at room temperature

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Journal of Energy Chemistry 2024年第8期95卷 325-335,I0008页

作者： Shenfei Zhao Xiaoshuai Wu Jiliang Zhang Chunjie li Zixiang Cui Weihua Hu Ruguang ma Changming li Institute for Clean Energy&Advanced materials School of Materials&EnergySouthwest UniversityChongqing 400715China Institute for materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215009JiangsuChina School of materials Science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina

Aqueous zinc-sulfur batteries at room temperature hold great potential for next-generation energy storage technology due to their low cost,safety and high energy ***,slow reaction kinetics and high activation energy at the sulfur cathode pose great challenges for the practical ***,biomass-derived carbon with single-atomic cobalt sites(MMPC-Co)is synthesized as the cathode in Zn-S *** catalysis of single-atom Co sites greatly promotes the transform of cathode electrolyte interface(CEI)on the cathode surface,while offering accelerated charge transfer rate for high conversion reversibility and large electrochemical surface area(ECSA)for high electrocatalytic ***,the rich pore structure not only physically limits sulfur loss,but also accelerates the transport of zinc *** addition,the large pore volume of MMPC-Co is able to relieve the stress effect caused by the volume expansion of Zn S during charge/discharge cycles,thereby maintaining the stability of electrode ***,the sulfur cathode maintains a high specific capacity of 729.96 m A h g^(-1)after 500 cycles at4 A g^(-1),which is much better than most cathode materials reported in the *** work provides new insights into the design and development of room-temperature aqueous Zn-S batteries.

关键词： Biomass-derived carbon Single-atom catalysts Rich pore structure Sulfur cathode Aqueous zinc-sulfur batteries

Covalent triazine frameworks materials for photo-and electrocatalysis

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nano Research 2024年第9期17卷 7830-7839页

作者： Aoji liang Wenbin li Anbai li Hui Peng Guofu ma Lei Zhu Ziqiang Lei Yuxi Xu Key Laboratory of Eco-functional Polymer materials of the Ministry of Education Key Laboratory of Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Chemistry and materials Science Hubei Key Laboratory of Quality Control of Characteristic Fruits and VegetablesHubei Engineering UniversityXiaogan 432000China School of Engineering Westlake UniversityHangzhou 310024China

Covalent triazine frameworks(CTFs)are a class of unique two-dimensional nitrogen-rich triazine framework with adjustable chemical and electronic structures,rich porosity,good stability and excellent semiconductivity,which enable great various applications in efficient gas/molecular adsorption and separation,energy storage and conversion,especially photo-and *** synthesis strategies strongly affect the morphology of CTFs and play an important role in their structure and *** this concept,we provide a comprehensive and systematic review of the synthesis methods such as ionothermal synthesis,phosphorus pentoxide catalytic method,polycondensation and ultra-strong acid catalyzed method,and applications of CTFs in photo-and *** we offer some insights into the future development progress of CTFs materials for catalytic applications.

关键词： covalent triazine frameworks synthetic strategy photocatalysis electrocatalysis

Association of tumor budding with clinicopathological features and prognostic value in stage III-IV colorectal cancer

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World Journal of Gastroenterology 2024年第2期30卷 158-169页

作者： Yue-Hao Luo Zhe-Cheng Yan Jia-Ying liu Xin-Yi li Ming Yang Jun Fan Bo Huang Cheng-Gong ma Xiao-na Chang Xiu Nie Department of Pathology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina

BACKGROUND Tumor budding(TB)has emerged as a promising independent prognostic biomarker in colorectal cancer(CRC).The prognostic role of TB has been extensively studied and currently affects clinical decision making in patients with stage I and II ***,existing prognostic studies on TB in stage III CRC have been confined to small retrospective cohort ***,this study investigated the correlation among TB categories,clinicopathological features,and prognosis in stage III-IV CRC to further enhance the precision and individualization of treatment through refined prognostic risk *** To analyze the relationship between TB categories and clinicopathological characteristics and assess their prognostic value in stage III-IV CRC to further refine the prognostic risk stratification of stage III-IV *** The clinical data of 547 CRC patients were collected for this retrospective *** at the front edge of the tumor buds was counted according to the 2016 International Tumor Budding Consensus Conference *** Multivariate Cox proportional hazards regression analysis demonstrated that chemotherapy(P=0.004),clinical stage IV(Pnal lymph node metastases(P=0.004),left-sided colonic cancer(P=0.040),and Bd 2-3(P=0.002)were independent prognostic factors in patients with stage III-IV ***,the density of tumor infiltrating lymphocytes was higher in Bd 1 than in Bd 2-3,both in the tumor stroma and its invasive *** TB has an independent predictive prognostic value in patients with stage III-IV *** is recommended to complete the TB report of stage III-IV CRC cases in the standardized pathological report to further refine risk stratification.

关键词： Tumor budding Tumor infiltrating lymphocytes Colorectal cancer Survival analysis Prognosis