检索结果-南通市图书馆

milling degree affects the fermentation properties of rice:perspectives from the composition of nutrients and gut microbiota via in vitro fermentation

引用

Food Science and Human Wellness 2024年第3期13卷 1578-1588页

作者： Yu Zhang Fan Li Shutong Pan Bing Bai Kai Huang Sen Li Hongwei Cao Tian Xie Jian Xie Xiao Guan School of Health Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China National Grain Industry(Urban Grain and Oil Security)Technology Innovation Center Shanghai 200093China Nutrition&Health Research Institute Co.Ltd. COFCO CorporationBeijing 102209China China Grain Wuhan Scientific Research&Design Institute Co.Ltd. Wuhan 430079China

Fermentation substrates of rice with different milling degrees(MDs) were prepared and fermented with human feces to compare their fermentation properties and effects on gut *** 0s,MD 5s and MD 60s represented brown rice,moderately-milled rice and white rice,*** in vitro fermentation,the MD 5s group showed higher starch utilization,compared with the MD 0s and 60s groups evaluated by Fourier transform infrared spectrometer,and confocal laser scanning *** of fermentation substrates of rice with different MDs on gut microbiota were evaluated by 16S rDNA *** the sample groups reduced the pH and produced short-chain fatty acids(SCFAs) and branched-chain fatty *** MD 5s group exhibited higher α-diversity than the MD 0s and 60s *** of Phascolarctobacterium,Blautia and norank_f_Ruminococcaceae were higher in the MD 0s and 5s groups,compared with the MD 60s *** bacteria were also positively correlated with the SCFAs production via Spearman correlation *** vitro culture assay revealed that fermentation substrates of MD 0s and 5s promoted the growth of two probiotics(Akkermansia muciniphila and Bifidobacterium adolescentis).Our results showed that moderate milling might be an appropriate way to produce rice products with richer nutrients and better fermentation properties.

关键词： Rice processing milling Whole grains Gut microbiota

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bone milling:On Monitoring Cutting State and Force Using Sound Signals

引用

Chinese Journal of Mechanical Engineering 2022年第3期35卷 123-134页

作者： Zhenzhi Ying Liming Shu Naohiko Sugita Department of Mechanical Engineering School of EngineeringThe University of Tokyo7‑3‑1 HongoBunkyo‑kuTokyo 1138656Japan Research into Artifacts Center for Engineering School of EngineeringThe University of Tokyo7‑3‑1 HongoBunkyo‑kuTokyo 1138656Japan

Efficient monitoring of bone milling conditions in orthopedic and neurosurgical surgery can prevent tissue,bone,and tool damage,and reduce surgery *** researches are mainly focused on recognizing the cutting state using force ***,the force signal during the milling process is difficult and expensive to *** this study,a neural network-based method is proposed to recognize the cutting state and force during the bone milling process using sound *** modeling of the cutting force is performed to capture the relationship between the cutting force and the depth of cut in the bone milling *** force model is used to calibrate the training data to improve the recognition *** package transform is used for signal processing to understand bone-cutting phenomena using sound *** proposed system succeeds to monitor the bone milling process to reduce the surgical *** on standard bone specimens and vertebrae also indicate that the proposed approach has considerable potential for use in computer-assisted and robot-assisted bone-cutting systems used in various types of surgery.

关键词： Cutting state Force milling Artificial neural network

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

State of the art in finite element approaches for milling process:a review

引用

Advances in Manufacturing 2023年第4期11卷 708-751页

作者： Shailendra Chauhan Rajeev Trehan Ravi Pratap Singh Department of Industrial and Production Engineering Dr.B R Ambedkar National Institute of TechnologyJalandharPunjabIndia

Over a century,metal cutting has been observed as a vital process in the domain of *** the numerous available metal-cutting processes,milling has been considered as one of the most employable processes to machine a variety of engineering materials *** the milling process,material removal occurs when the workpiece is fed against a rotating tool with multiple cutting *** order to maximize the profitability of metal cutting operations,it is essential that the various input and output variable relationships are analyzed and *** experimental method of studying milling processes is costly and time demanding,particularly when a large variety of elements such as cutting tool shape,materials,cutting conditions,and so on,are *** to these issues,other alternatives emerged in the form of mathematical simulations that employ numerical *** finite element approaches have well-proven to be the most practical and commonly utilized numerical *** finite element model(FEM)can be used to determine the various physical interactions occurring during the machining process along with the prediction of various milling characteristics,such as cutting forces,cutting temperature,stresses,etc.,with the help of milling *** the present article,various research studies in the broad milling process domain practiced with numerous finite element approaches have been critically reviewed and *** further highlights the several experimental and finite element approaches-based research studies that attempted to analyze and optimize the overall performance of the different milling *** recent years,various investigators have explored numerous ways to enhance milling performance by probing the different factors that influence the quality *** of the studies have also been found to be focused on the economic impacts of milling and various process inputs that affect milling ***,various milli

关键词： milling Finite element modeling(FEM) Micro milling Turn-milling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tribological Performance of Different Concentrations of Al_(2)O_(3)Nanofluids on Minimum Quantity Lubrication milling

引用

Chinese Journal of Mechanical Engineering 2023年第4期36卷 67-78页

作者： Xiufang Bai Juan Jiang Changhe Li Lan Dong Hafiz Muhammad Ali Shubham Sharma School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical and Electrical Engineering Qingdao Binhai UniversityQingdao 266555China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Mechanical Engineering IK Gujral Punjab Technical UniversityMain Campus-KapurthalaJalandhar 144603India

Nanofluid minimum quantity lubrication(NMQL)is a green processing *** oil is suitable as base oil because of excellent lubrication performance,low freezing temperature,and high ***_(2)O_(3)nanoparticles improve not only the heat transfer capacity but also the lubrication *** physical and chemical proper-ties of nanofluid change when Al_(2)O_(3)nanoparticles are ***,the effects of the concentration of nanofluid on lubrication performance remain ***,the mechanisms of interaction between Al_(2)O_(3)nanoparti-cles and cottonseed oil are *** this research,nanofluid is prepared by adding different mass concentrations of Al_(2)O_(3)nanoparticles(0,0.2%,0.5%,1%,1.5%,and 2%wt)to cottonseed oil during minimum quantity lubrication(MQL)milling 45 *** tribological properties of nanofluid with different concentrations at the tool/workpiece interface are studied through macro-evaluation parameters(milling force,specific energy)and micro-evaluation parameters(surface roughness,micro morphology,contact angle).The result show that the specific energy is at the minimum(114 J/mm^(3)),and the roughness value is the lowest(1.63μm)when the concentration is 0.5 wt%.The surfaces of the chip and workpiece are the smoothest,and the contact angle is the lowest,indicating that the tribological proper-ties are the best under 0.5 wt%.This research investigates the intercoupling mechanisms of Al_(2)O_(3)nanoparticles and cottonseed base oil,and acquires the optimal Al_(2)O_(3)nanofluid concentration to receive satisfactory tribological properties.

关键词： milling Al_(2)O_(3)nanofluid Minimum quantity lubrication(MQL) Surface micromorphology

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental study on the wear evolution of different PVD coated tools under milling operations of LDX2101 duplex stainless steel

引用

Advances in Manufacturing 2023年第1期11卷 158-179页

作者： Vitor F.C.Sousa Francisco J.G.Silva Ricardo Alexandre Jose S.Fecheira Gustavo Pinto Andresa Baptista ISEP-School of Engineering Polytechnic of PortoRua Dr.António Bernardino de Almeida4314200–072PortoPortugal INEGI-Driving Science and Innovation Rua Dr.Roberto Frias4004200–465PortoPortugal TEandM-Technology Engineering and MaterialsS.A.Parque Industrial do TaveiroLotes 41-423045–504TaveiroPortugal

Duplex stainless steels are being used on applications that require,especially,high corrosion resistance and overall good mechanical properties,such as the naval and oil-gas exploration *** components employed in these industries are usually obtained by machining,however,these alloys have low machinability when compared to conventional stainless *** this work,a study of the wear developed when milling duplex stainless-steel,LDX 2101,is going to be presented and evaluated,employing four types of milling tools with different geometries and coatings,while studying the influence of feed rate and cutting length in the wear of these *** used have been provided with two and four flutes,as well as three different coatings,namely:TiAlN,TiAlSiN and *** cutting behavior of these tools was analyzed;data relative to the cutting forces developed during the process were obtained;and roughness measurements of the machined surfaces were *** tools were then submitted to scanning electron microscope(SEM)analysis,enabling the identification of the wear mechanisms that tools were subjected to when machining this material,furthermore,the early stages of these mechanisms were also *** this work was done with the goal of relating the machining parameters and cutting force values obtained,identifying,and discussing the wear patterns that were observed in the coating and tools after the milling tests,providing further information on the machining of these alloys.

关键词： Duplex stainless-steel milling Tool coatings Surface roughness Wear mechanisms

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Vibration signal-based chatter identification for milling of thin-walled structure

引用

Chinese Journal of Aeronautics 2022年第1期35卷 204-214页

作者： Wenping MOU Shaowei ZHU Zhenxi JIANG Ge SONG NC Machining Plant Chengdu Aircraft Industrial(Group)Co.LtdChengdu 610092China

In high speed milling aeronautical part,tool condition monitoring(TCM)is very important,because it is prone to get a chatter owing to the low stiffness of thin-walled *** the TCM is key technology for automated *** this paper,aiming to chatter monitoring in thin-walled structure milling,a variational mode decomposition–energy distribution(VMD-ED)method is proposed to improve the identification *** a moving average root mean square–mean value(MARMS-MV)identification method and a variational mode decomposition–energy entropy(VMD-EE)identification method are also *** accuracy and computing time of the three methods are *** vibration signals collected from the spindle and worktable are also *** conducted experimental study shows that,the proposed VMD-ED method offers an identification method for chatter monitoring with greater sensitivity,better stability and less computing time,and mounting the vibration sensor on worktable is better than spindle for a chatter monitoring system.

关键词： Chatter milling Thin-walled structure Tool condition monitoring Vibration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Feasibility analysis and process characteristics of selective laser ablation assisted milling Inconel 718

引用

Advances in Manufacturing 2022年第4期10卷 495-519页

作者： Bao-Yu Zhang Yu-Ning Zeng Xue-Qin Pang Song-Qing Li Xiao Liu Wen-Jun Deng School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510641People’s Republic of China

Laser-assisted machining(LAM),as one of the most efficient ways,has been employed to improve the machinability of nickel-based ***,the conventional LAM process usually used high power laser with large spot size,easily leading to high processing costs and overheating of bulk *** this paper,a new approach of selective laser ablation assisted milling(SLA-Mill)process for nickel-based superalloys was proposed,in which low power laser with small spot size was used to selectively ablate the uncut surface in front of the cutting tool,resulting in plentiful surface defects *** defects would significantly weaken the mechanical strength of difficult-to-cut materials,which was different from the thermal“softening”principle of conventional ***,the laser ablation effect with low power and small spot size was first *** relationship between process parameters(e.g.,laser power,cutting speed and cutting depth)and process characteristics of SLA-Mill(e.g.,chip morphology,tool wear and surface integrity)was systematically ***,the chip formation mechanism in the SLA-Mill process was indepth *** show that the SLA-Mill process is an effective approach for enhancing the machinability of nickel-based *** resultant cutting force has a reduction of about 30%at laser power of 60 W,cutting speed of 90 m/min,and cutting depth of 0.1 ***,the chip formation,tool wear,and surface integrity have improved *** general,this paper provides a new route for the application of LAM technology.

关键词： Laser-assisted machining(LAM) Nickel-based superalloys Laser ablation Machinability milling

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fiber-reinforced composites in milling and grinding:machining bottlenecks and advanced strategies

引用

Frontiers of Mechanical Engineering 2022年第2期17卷 1-35页

作者： Teng GAO Yanbin ZHANG Changhe LI Yiqi WANG Yun CHEN Qinglong AN Song ZHANG Hao Nan LI Huajun CAO Hafiz Muhammad ALI Zongming ZHOU Shubham SHARMA School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical Engineering Dalian University of TechnologyDalian 116024China Chengdu Tool Research Institute Co. Ltd.Chengdu 610500China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Aerospace University of Nottingham Ningbo ChinaNingbo 315100China School of Mechanical Engineering Chongqing UniversityChongqing 400044China Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Hanergy(Qingdao)Lubrication Technology Co. Ltd.Qingdao 266100China Department of Mechanical Engineering IK Gujral Punjab Technical UniversityPunjab 144603India

Fiber-reinforced composites have become the preferred material in the fields of aviation and aerospace because of their high-strength performance in unit *** composite components are manufactured by near netshape and only require finishing operations to achieve final dimensional and assembly *** and grinding arise as the preferred choices because of their precision ***,given their laminated,anisotropic,and heterogeneous nature,these materials are considered *** undesirable results and challenging breakthroughs,the surface damage and integrity of these materials is a research hotspot with important engineering *** review summarizes an up-to-date progress of the damage formation mechanisms and suppression strategies in milling and grinding for the fiber-reinforced composites reported in the ***,the formation mechanisms of milling damage,including delamination,burr,and tear,are ***,the grinding mechanisms,covering material removal mechanism,thermal mechanical behavior,surface integrity,and damage,are ***,suppression strategies are reviewed systematically from the aspects of advanced cutting tools and technologies,including ultrasonic vibration-assisted machining,cryogenic cooling,minimum quantity lubrication(MQL),and tool optimization *** vibration shows the greatest advantage of restraining machining force,which can be reduced by approximately 60%compared with conventional *** cooling is the most effective method to reduce temperature with a maximum reduction of approximately 60%.MQL shows its advantages in terms of reducing friction coefficient,force,temperature,and tool ***,research gaps and future exploration directions are prospected,giving researchers opportunity to deepen specific aspects and explore new area for achieving high precision surface machining of fiber-reinforced composites.

关键词： milling grinding fiber-reinforced composites damage formation mechanism delamination material removal mechanism surface integrity minimum quantity lubrication

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

milling surface roughness for 7050 aluminum alloy cavity influenced by nozzle position of nanofluid minimum quantity lubrication

引用

Chinese Journal of Aeronautics 2021年第6期34卷 33-53页

作者： Zhenjing DUAN Changhe LI Yanbin ZHANG Lan DONG Xiufang BAI Min YANG Dongzhou JIA Runze LI Huajun CAO Xuefeng XU School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao 266520China School of Mechanical and Electrical Engineering Qingdao Binhai UniversityQingdao 266555China School of Mechanical Engineering Inner Mongolia University for NationalitiesTongliao 028000China Department of Biomedical Engineering University of Southern CaliforniaCA90089-1111 Los AngelesU.S.A. State Key Laboratory Mechanical Transmiss Chongqing UniversityChongqing 400044China Zhejiang University of Technology Hangzhou 310032China

In nanofluid minimum quantity lubrication(NMQL)milling of aviation aluminum alloy,it is the bottleneck problem to adjust the position parameters(target distance,incidence angle,and elevation angle)of the nozzle to improve the surface roughness of milling,which has large and uncontrollable *** this paper,the influence law of milling cutter speed,helical angle,and cavity shape on the flow field around the milling cutter was studied,and the optimal nozzle profile parameters were *** 7050 aluminum alloy as the workpiece material,the milling experiment of the NMQL cavity was conducted by utilizing cottonseed oil-based Al2 O3 *** show that the high velocity of the surrounding air flow field and the strong gas barrier could be attributed to high rotating velocities of the milling *** incidence angle of the nozzle was consistent with the helical angle of the milling cutter,the target distance was appropriate at 25–30 mm,and the elevation angle was suitable at 60°–65°.The range and variance analyses of the signal-to-noise ratio of milling force and roughness were performed,and the chip morphology was observed and *** results show that the optimal combination of nozzle position parameters was the target distance of 30 mm,the incidence angle of 35°,and the elevation angle of 60°.Among these parameters,target distance had the largest impact on cutting performance with a contribution rate of more than 55%,followed by incidence angle and elevation contribution *** by orthogonal experiment revealed that the nozzle position parameters were appropriate,and Ra(0.087 lm)was reduced by 30.4%from the maximum value(0.125 lm).Moreover,Rsm(0.05 mm)was minimum,which was 36%lower than that of the seventh group(Rsm=0.078 mm).

关键词： 7050 aluminum alloy milling milling force Nanofluid minimum quantity lubrication Nozzle position Orthogonal experimental Roughness SNR

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：