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Preliminary Investigation of the Reversible 4D Printing of a Dual-Layer Component Article

Amelia Yilin Lee, Jia An, Chee Kai Chu, Yi Zhang

Engineering 2019, Volume 5, Issue 6,   Pages 1159-1170 doi: 10.1016/j.eng.2019.09.007

Abstract: manufacturing and advances in shape memory materials have fueled the progress of four-dimensional (4DWith increasing improvements in design, reversible 4D printing—or two-way 4D printing—hasneed for human interference, as the programming is completely driven by external stimuli, which allows 4D-printedThis study proposes a new reversible 4D printing actuation method.This understanding of the curvature will provide a great degree of control over the reversible 4D-printed

Keywords： 4D printing     Additive manufacturing     Shape memory polymer     Reversible 4D printing     Two-way 4D printing    

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Laws of 4D Printing Article

Farhang Momeni, Jun Ni

Engineering 2020, Volume 6, Issue 9,   Pages 1035-1055 doi: 10.1016/j.eng.2020.01.015

Abstract: Accordingly, four-dimensional (4D) printing is a manufacturing process that involves multiple researchfields. 4D printing conserves the general attributes of 3D printing (such as material waste reductionshow that two types of time constants are needed to capture the correct time-dependent behavior of 4Dintroduce the concept of mismatch-driven stress at the interface of active and passive materials in 4Dwith governing equations can serve as general design principles for future research in the field of 4D

Keywords： Manufacturing     Stimuli-responsive materials     Mechanics of materials     Time constant     4D printing    

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System Simulation for Large-scale Bridge Construction Schedule Based on 4D CAD

Zhang Zhengfeng,Fu Jinqiang,Wu Kangxin,Zhang Fayu

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 63-66

Abstract: system with the CAD digital modeling technology, the system simulation of bridge construction based upon 4DCAD was presented, which linked a 3D model of a construction project with a project activity scheduleAnd the corresponding software of visualization simulating system, based on 4D CAD, for construction

Keywords： construction schedule     system simulation     4D CAD     cable-stayed bridge    

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Two-Way 4D Printing: A Review on the Reversibility of 3D-Printed Shape Memory Materials

Amelia Yilin Lee, Jia An, Chee Kai Chua

Engineering 2017, Volume 3, Issue 5,   Pages 663-674 doi: 10.1016/J.ENG.2017.05.014

Abstract: manufacturing and advances in shape memory materials have fueled the progress of four-dimensional (4D, but reversible 4D printing, or two-way 4D printing, will fully eliminate the need for human interference, current findings regarding 4D printing in alloys and polymers, and their respective limitations.For reversible 4D printing, the methods of 3D printing, mechanisms used for actuation, and strategiesFinally, prospective future research directions in reversible 4D printing are suggested.

Keywords： 4D printing     Additive manufacturing     Shape memory material     Smart materials     Shape memory alloy     Shape memory    

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Development of Bioimplants with 2D, 3D, and 4D Additive Manufacturing Materials Review

Guo Liu, Yunhu He, Pengchao Liu, Zhou Chen, Xuliang Chen, Lei Wan, Ying Li, Jian Lu

Engineering 2020, Volume 6, Issue 11,   Pages 1232-1243 doi: 10.1016/j.eng.2020.04.015

Abstract: However, 3D printable materials are still quite limited for the fabrication of bioimplants.In this work, 2D/3D AM materials for bioimplants are reviewed.Furthermore, inspired by Tai Chi, a simple yet novel soft/rigid hybrid 4D AM concept is advanced to developcomplex and dynamic biological structures in the human body based on 4D printing hybrid ceramic precursor3D/4D AM materials can be anticipated.

Keywords： Bioprinting     2D additive manufacturing     3D printing     4D printing     Bioimplants    

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Identifying stakeholders’ roles and relevant project documents for 4D-based collaborative decision making

Veronika BOLSHAKOVA, Annie GUERRIERO, Gilles HALIN

Frontiers of Engineering Management 2020, Volume 7, Issue 1,   Pages 104-118 doi: 10.1007/s42524-019-0041-4

Abstract: To fully understand and effectively implement 4D building information modelling (BIM) models and methodsThis article studies the convergence between uses of 4D BIM and digital project documents.We hypothesize that a clear visualization of the construction simulation through a 4D model is a usefulIt then introduces a proposition for 4D BIM uses implementation by the project development phase.It concludes by summarizing stakeholders’ roles and documents relevant to 4D BIM uses.

Keywords： BIM     4D BIM     4D BIM use     AEC project management     collaboration     decision making    

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Semantics for linking data from 4D BIM to digital collaborative support

Calin BOJE, Veronika BOLSHAKOVA, Annie GUERRIERO, Sylvain KUBICKI, Gilles HALIN

Frontiers of Engineering Management 2022, Volume 9, Issue 1,   Pages 104-116 doi: 10.1007/s42524-020-0111-7

Abstract: Synchronous collaboration sessions within the context of 4D BIM position construction professionals intoThe model is designed by considering various 4D BIM model uses while a digital multiuser touch tableAlthough 4D BIM model data can be imported by using standard formats, capturing data about the social

Keywords： 4D BIM     ontology     IFC     decision-making     linked data     collaboration     planning    

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A Theoretical Summary and Mathematics Expression on the Regulation of Life in Meridian (Jing-Iuo) Science

Zhang Renxiang,Zhang Renji

Strategic Study of CAE 2005, Volume 7, Issue 4,   Pages 42-46

Abstract:

The meridian (Jing-Luo) is a core principle of Chinese medicine. The meridian plays a central role in the regulation of human health and vitality. In the past 50 years,the scientific evidence has been gathered via physiological experiments to confirm the biological basis of the human meridian pathway phenomenon. Meridian Science has been established as a new branch of natural science to advance and promote the study of this important phenomenon for human life. In this paper, the authors describe the theoretical concept of the meridian and mathematics expression, its relationship to an efficient meridian circadian cycle, and its significance to human life.

Keywords： comprehension     meridian science     principal of bi-way transforming modulation in symmetry and asymmetry     diagramof 4D meridian circulation     efficiency of meridian linking up    

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Research on 4-adj model for determination of spatial relations in spattio model

Li Chengming

Strategic Study of CAE 2013, Volume 15, Issue 5,   Pages 37-41

Abstract: At last, the paper proposes the new method called four-adjacent mathematical model (4-adj model) basedon Voronoi diagram to dynamically infer the spatial relations in spattio model, and gives the only complete

Keywords： spattio model     spattio object     Voronoi diagram     4-adj model    

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Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

SWARUP, D. P. KOTHARI

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 333-341 doi: 10.1007/s11708-013-0259-5

Abstract: In the present electricity market, where renewable energy power plants have been included in the power systems, there is a lot of unpredictability in the demand and generation. There are many conventional and evolutionary programming techniques used for solving the unit commitment (UC) problem. Dynamic programming (DP) is a conventional algorithm used to solve the deterministic problem. In this paper DP is used to solve the stochastic model of UC problem. The stochastic modeling for load and generation side has been formulated using an approximate state decision approach. The programs were developed in a MATLAB environment and were extensively tested for a four-unit eight-hour system. The results obtained from these techniques were validated with the available literature and outcome was good. The commitment is in such a way that the total cost is minimal. The novelty of this paper lies in the fact that DP is used for solving the stochastic UC problem.

Keywords： unit commitment (UC)     deterministic     stochastic     dynamic programming (DP)     optimization     state diagram    

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Development of dimensionless P-I diagram for curved SCS sandwich shell subjected to uniformly distributed

Yonghui WANG, Ximei ZHAI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1432-1445 doi: 10.1007/s11709-019-0566-y

Abstract: In this paper, a dimensionless Pressure-Impulse (P-I) diagram was constructed as a convenient tool toTo construct the dimensionless P-I diagram, the energy balance method was utilized to yield the pressureThen, the finite element method was employed to validate the developed dimensionless P-I diagram.Finally, the procedures of using the constructed dimensionless P-I diagram to quickly conduct the blast

Keywords： blast loading     curved steel-concrete-steel sandwich shell     Pressure-Impulse diagram     single-degree-of-freedom    

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Fabrication of layered structure VS anchor in 3D graphene aerogels as a new cathode material for lithium

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 597-602 doi: doi:10.1007/s11708-018-0576-9

Abstract: VS4 has gained more and more attention for its high theoretical capacity (449 mAh/g with 3eHerein, a layered structure VS4 anchored in graphene aerogels is prepared and first reportedVS4@GAs composite exhibits an exceptional high initial reversible capacity (511 mAh/g), an

Keywords： VS4     graphene aerogels     cathode     lithium storage    

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Construction of a CaHPO4-PGUS1 hybrid nanoflower through protein-inorganic self-assembly, and its applicationin glycyrrhetinic acid 3-O-mono-β-D-glucuronide preparation

Tian Jiang, Yuhui Hou, Tengjiang Zhang, Xudong Feng, Chun Li

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 554-562 doi: 10.1007/s11705-019-1834-z

Abstract: Glycyrrhetinic acid 3- -mono- -D-glucuronide (GAMG), an important pharmaceutical intermediate and functional

Keywords： enzyme-inorganic hybrid nanoflower     biotransformation     glycyrrhizin     glycyrrtinic acid 3-O-mono-β-D-glucuronide    

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Efficient production of D-1,2,4-butanetriol from D-xylose by engineered

Shewei Hu, Qian Gao, Xin Wang, Jianming Yang, Nana Xu, Kequan Chen, Sheng Xu, Pingkai Ouyang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 772-779 doi: 10.1007/s11705-018-1731-x

Abstract: We have developed a whole-cell bioconversion system for the production of D-1,2,4-butanetriol (BT) fromconstructed and transformed to BL21(DE3) to obtain the whole cells of BL21- capable of bioconversion D-xylose

Keywords： D-1     2     4-butanetriol     whole-cell bioconversion     carbon source     nitrogen sources     metal ions     culture conditions    

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Title Author Date Type Operation

Preliminary Investigation of the Reversible 4D Printing of a Dual-Layer Component

Amelia Yilin Lee, Jia An, Chee Kai Chu, Yi Zhang

Journal Article

Laws of 4D Printing

Farhang Momeni, Jun Ni

Journal Article

System Simulation for Large-scale Bridge Construction Schedule Based on 4D CAD

Zhang Zhengfeng,Fu Jinqiang,Wu Kangxin,Zhang Fayu

Journal Article

Two-Way 4D Printing: A Review on the Reversibility of 3D-Printed Shape Memory Materials

Amelia Yilin Lee, Jia An, Chee Kai Chua

Journal Article

Development of Bioimplants with 2D, 3D, and 4D Additive Manufacturing Materials

Guo Liu, Yunhu He, Pengchao Liu, Zhou Chen, Xuliang Chen, Lei Wan, Ying Li, Jian Lu

Journal Article

Identifying stakeholders’ roles and relevant project documents for 4D-based collaborative decision making

Veronika BOLSHAKOVA, Annie GUERRIERO, Gilles HALIN

Journal Article

Semantics for linking data from 4D BIM to digital collaborative support

Calin BOJE, Veronika BOLSHAKOVA, Annie GUERRIERO, Sylvain KUBICKI, Gilles HALIN

Journal Article

A Theoretical Summary and Mathematics Expression on the Regulation of Life in Meridian (Jing-Iuo) Science

Zhang Renxiang,Zhang Renji

Journal Article

Lv Jian: Recent Development of Additive Manufacturing of Nanomaterials and 4D Printing Structures（2019

吕坚(院士)

20 Jan 2021

Conference Videos

Research on 4-adj model for determination of spatial relations in spattio model

Li Chengming

Journal Article

Unit commitment using dynamic programming–an exhaustive working of both classical and stochastic approach

SWARUP, D. P. KOTHARI

Journal Article

Development of dimensionless P-I diagram for curved SCS sandwich shell subjected to uniformly distributed

Yonghui WANG, Ximei ZHAI

Journal Article

Fabrication of layered structure VS anchor in 3D graphene aerogels as a new cathode material for lithium

Journal Article

Construction of a CaHPO4-PGUS1 hybrid nanoflower through protein-inorganic self-assembly, and its applicationin glycyrrhetinic acid 3-O-mono-β-D-glucuronide preparation

Tian Jiang, Yuhui Hou, Tengjiang Zhang, Xudong Feng, Chun Li

Journal Article

Efficient production of D-1,2,4-butanetriol from D-xylose by engineered

Shewei Hu, Qian Gao, Xin Wang, Jianming Yang, Nana Xu, Kequan Chen, Sheng Xu, Pingkai Ouyang

Journal Article