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Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0737-8

Abstract: The build orientation is crucial in AM because it affects the as-built part, including its part accuracy, surface roughness, support structure, and build time and cost.A mechanical part is usually composed of multiple surface features.This study proposes a method to determine the build orientation of multi-feature mechanical parts (MFMPsorientation from those ABOs.

Keywords： selective laser melting (SLM)     build orientation determination     multi-feature mechanical part (MFMP)    

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Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing based on triangular fuzzy number

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 133-150 doi: 10.1007/s11465-020-0610-6

Abstract: Second, the optimal AM part build orientation is determined using the genetic algorithm to optimize thesurface accuracy of the circular holes by minimizing the weighted volumetric error of the part.Lastly, an improved adaptive slicing algorithm is utilized to reduce the entire build time while maintaining

Keywords： surface accuracy optimization     multiple circular holes     additive manufacturing (AM)     part build orientation    

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INTERCROPPING: FEED MORE PEOPLE AND BUILD MORE SUSTAINABLE AGROECOSYSTEMS

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 3,   Pages 373-386 doi: 10.15302/J-FASE -2021398

Abstract:

Intercropping is a traditional farming system that increases crop diversity to strengthen agroecosystem functions while decreasing chemical inputs and minimizing negative environmental effects of crop production. Intercropping is currently considerable interest because of its importance in sustainable agriculture. Here, we synthesize the factors that make intercropping a sustainable means of food production by integrating biodiversity of natural ecosystems and crop diversity. In addition to well-known yield increases, intercropping can also increase yield stability over the long term and increase systemic resistance to plant diseases, pests and other unfavorable factors (e.g. nutrient deficiencies). The efficient use of resources can save mineral fertilizer inputs, reduce environmental pollution risks and greenhouse gas emissions caused by agriculture, thus mitigating global climate change. Intercropping potentially increases above- and below-ground biodiversity of various taxa at field scale, consequently it enhances ecosystem services. Complementarity and selection effects allow a better understanding the mechanisms behind enhanced ecosystem functioning. The development of mechanization is essential for large-scale application of intercropping. Agroecosystem multifunctionality and soil health should be priority topics in future research on intercropping.

 

Keywords： agroecosystems ， crop diversity ，intercropping，interspecific interactions，sustainable agriculture    

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Utilizing big data to build personalized technology and system of diagnosis and treatment in traditional

Baoyan Liu

Frontiers of Medicine 2014, Volume 8, Issue 3,   Pages 272-278 doi: 10.1007/s11684-014-0364-9

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Build a Bridge between Science and Economy

Hans-Jurgen Warnecke

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 16-17

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Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC

Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11,   Pages 1424-1435 doi: 10.1007/s11709-022-0870-9

Abstract: The orientation of fibers, in this regard, is one of the major factors influencing the ductile behaviorIn this study, fiber orientation distributions in ECC beams influenced by different casting techniquesThe simulation results show a significant impact of the casting direction on fiber orientation distributionsIn addition, casting positions show negligible influences on the orientation distribution of fibers in

Keywords： ECC     fiber orientation distribution     casting direction     casting position    

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Crystallographic orientation effect on cutting-based single atomic layer removal

Wenkun XIE, Fengzhou FANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 631-644 doi: 10.1007/s11465-020-0599-x

Abstract: In the present study, the crystallographic orientation effect on the cutting-based single atomic layer

Keywords： ACSM     single atomic layer removal mechanism     crystallographic orientation effect     mechanical cutting     Manufacturing    

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Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 1-12 doi: 10.1007/s11465-007-0001-2

Abstract: Thin films and multi-layered coatings comprised of different classes of materials are often used for various functional devices. The thermo-mechanical integrity of these systems is becoming a major concern and is strongly related to the residual stresses because of the fabrication processes. In this paper, the sources of the residual stresses in the coating-based systems and the concept of misfit strain were briefly reviewed. Analytical models were developed to predict the residual stresses in multi-layered film structures or coating-based systems using the force and moment balances. In addition, the residual stress distributions in the func tionally and compositionally graded coatings were also analyzed.

Keywords： briefly     different     thermo-mechanical integrity     addition     residual    

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Tomographic diagnosis of defects in hydraulic concrete structure

ZHAO Mingjie, XU Xibin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 226-232 doi: 10.1007/s11709-008-0027-5

Abstract: The influences of water, scale and orientation of defect, processing methods and theoretical model onDefects with the orientation perpendicular to the direction of the diagnosis may have higher precision

Keywords： satisfactory     processing     orientation     tomographic diagnosis     orientation perpendicular    

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Process development for green part printing using binder jetting additive manufacturing

Hadi MIYANAJI, Morgan ORTH, Junaid Muhammad AKBAR, Li YANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4,   Pages 504-512 doi: 10.1007/s11465-018-0508-8

Abstract: In this work, the process design considerations for BJ-AM in green part fabrication were discussed incould significantly affect the printing quality of the green parts such as geometrical accuracy and part

Keywords： binder jetting     additive manufacturing     green part     process optimization     process development    

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Improvement of part-load performance of gas turbine by adjusting compressor inlet air temperature and

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 1000-1016 doi: 10.1007/s11708-021-0746-z

Abstract: A novel adjusting method for improving gas turbine (GT) efficiency and surge margin (SM) under part-loadThe equilibrium running lines calculated through the calculation method involve three part-load conditionsIn addition, inlet air heating has a considerable potential for the improvement of part-load performance

Keywords： inlet air temperature     inlet guide vane (IGV) opening     part-load     equilibrium running line     gas turbine    

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Taking Warning from the Eastern Part Elegant Landscape Maturing Slowly——On Landscape Architectural Developmentin the Western Part of China

Meng Zhaozhen

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 56-58

Abstract:

First of all, it is necessary carried out comprehensive national land planning and individual design from the high plane of harmonious sustainable development between man's production and natural environment.

The essence of cities at present should be an environment for human settlement and living. The relation between urbanization process and natural environment is neither to diametrically oppose nor to damage each other. The image of the city is not only buildings and streets but also a mix of cities, architecture and natural environment, i.e.an artificial beauty merging into nature. Man's bright future will be to put cities and buildings into green environment.

The most important thing for construction of scenic and historical places and city parks and gardens is now to protect the natural resources of the site. It is wrong to follow limelight from others. Each city should creates its own feature from local natural environment and cultural tradition.

Elegant landscape will mature slowly. Great thing always gets a late prosperous termination of an affair.

Keywords： urbanization process     scenic and historical places     urban parks and gardens    

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Planar jumping with stable landing through foot orientation design and ankle joint control

Qilong YUAN, I-Ming CHEN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 100-108 doi: 10.1007/s11465-012-0318-3

Abstract:

This paper introduces a method to generate the planar jumping motion for biped robot. In this work, through determining the upper body posture trajectory in the flight phase, the foot landing posture is made to be flat while landing. Together with properly designing the trajectory for local center of gravity and the foot landing velocity, the soft landing trajectory is generated. A controller on the ankle joint is added to avoid significant impact with the ground and stabilize the robot after landing. Jumping motion with stable landing is achieved in a dynamic simulation environment based on this method.

Keywords： biped jumping     stable landing control     jumping motion generation    

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Part-load, startup, and shutdown strategies of a solid oxide fuel cell-gas turbine hybrid system

Yang LI, Yiwu WENG, Shilie WENG

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 181-194 doi: 10.1007/s11708-011-0149-7

Abstract: Three different part-load strategies are introduced and used to analyze the part-load performance of

Keywords： solid oxide fuel cell (SOFC)     hybrid system     part-load strategy     startup     shutdown    

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Heating energy performance and part load ratio characteristics of boiler staging in an office building

Da Young LEE, Byeong Mo SEO, Yeo Beom YOON, Sung Hyup HONG, Jong Min CHOI, Kwang Ho LEE

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 339-353 doi: 10.1007/s11708-018-0596-5

Abstract: ., the part load ratio characteristics and the corresponding gas energy consumption patterns are notIn this study, the part load ratio and the operating characteristics of gas boiler have been analyzedsignificant portions of total operating hours, heating load and energy consumption has been found to be in a partof 0 through 40% and thus energy consumption is significantly affected by boiler efficiency at low partThis suggests that boiler operation at the part load is an important factor in commercial buildings.

Keywords： EnergyPlus     boiler     part load ratio     gas consumption     office building     boiler staging    

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Title Author Date Type Operation

Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective

Journal Article

Surface accuracy optimization of mechanical parts with multiple circular holes for additive manufacturing based on triangular fuzzy number

Jinghua XU, Hongsheng SHENG, Shuyou ZHANG, Jianrong TAN, Jinlian DENG

Journal Article

INTERCROPPING: FEED MORE PEOPLE AND BUILD MORE SUSTAINABLE AGROECOSYSTEMS

Journal Article

Utilizing big data to build personalized technology and system of diagnosis and treatment in traditional

Baoyan Liu

Journal Article

Build a Bridge between Science and Economy

Hans-Jurgen Warnecke

Journal Article

Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC

Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI

Journal Article

Crystallographic orientation effect on cutting-based single atomic layer removal

Wenkun XIE, Fengzhou FANG

Journal Article

Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling

ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou

Journal Article

Tomographic diagnosis of defects in hydraulic concrete structure

ZHAO Mingjie, XU Xibin

Journal Article

Process development for green part printing using binder jetting additive manufacturing

Hadi MIYANAJI, Morgan ORTH, Junaid Muhammad AKBAR, Li YANG

Journal Article

Improvement of part-load performance of gas turbine by adjusting compressor inlet air temperature and

Journal Article

Taking Warning from the Eastern Part Elegant Landscape Maturing Slowly——On Landscape Architectural Developmentin the Western Part of China

Meng Zhaozhen

Journal Article

Planar jumping with stable landing through foot orientation design and ankle joint control

Qilong YUAN, I-Ming CHEN

Journal Article

Part-load, startup, and shutdown strategies of a solid oxide fuel cell-gas turbine hybrid system

Yang LI, Yiwu WENG, Shilie WENG

Journal Article

Heating energy performance and part load ratio characteristics of boiler staging in an office building

Da Young LEE, Byeong Mo SEO, Yeo Beom YOON, Sung Hyup HONG, Jong Min CHOI, Kwang Ho LEE

Journal Article