Homogeneous transparent device and its layered realization

Yang, Cheng–Fu; Huang, Ming; Yang, Jingjing; Mao, Fuchun; Li, Tinghua; Li, Peng; Ren, Pengshan

doi:10.1088/1674-1056/27/12/124101

Cited by 5 publications

(4 citation statements)

References 39 publications

(38 reference statements)

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“…A nationalized or regionalized database is an essential basis and premise for building life cycle assessment [35,[38][39][40]. Different countries and regions have established their own LCA databases and assessment tools for the construction industry [3,21,41].…”

Section: National/regionalized Approachmentioning

confidence: 99%

“…They differ in terms of production conditions, electric mix, and relevant weight coefficients across countries and regions. Previous studies [38,39] have shown that a country-specific LCI database should be applied to obtain more referential results.…”

Section: National/regionalized Approachmentioning

confidence: 99%

“…This contribution is the further exploration based on previous findings on the relevant topics that had been published in a journal article [59] and a conference paper [38] by the same authors.…”

Section: Fundingmentioning

confidence: 99%

See 2 more Smart Citations

A BIM–LCA Approach for the Whole Design Process of Green Buildings in the Chinese Context

Yang

Kohler

et al. 2023

Sustainability

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The integrated description of the building geometry and the element attributes of the building information model (BIM) can reduce the effort needed to acquire data for life cycle assessment (LCA) and life cycle costing (LCC) at each design stage while supporting their potential for analyzing life cycle performances and feeding back to the design process. To support this, several methods and tools have been proposed that aim to obtain the life cycle performances of buildings following the level of model fidelity with the life cycle inventory (LCI) database at different scales. However, inconsistencies in decision-making caused by regional differences in LCA/LCC data sources, benchmarks, and building standards cannot be ignored. In this study, a scalable LCA/LCC method integrated with the BIM platform is proposed for the whole green building design process in the Chinese context, and it is implemented with a developed tool based on Revit. A national-/regional-specified database of building elements and materials is established. Referring to China’s carbon-neutral target and relevant standards for green buildings, the baseline values are deduced, and a reference building is defined accordingly to facilitate the evaluation and improvement of the design scheme. According to the Assessment Standard for Green Building (GB50378-2019) and the survey of architectural design practices in China, the key parameters at different design stages are defined. The method and tool are demonstrated using the case study of a school building, analyzing its life cycle carbon emissions and life cycle costs throughout the design process. The results show that the proposed method can facilitate the improvement of the scheme at different design stages and that it can cope with different data accuracies and different LODs in the building information model in the Chinese green building design process. Lastly, the uncertainties raised by the data quality and time-associated factors are discussed.

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Section: National/regionalized Approachmentioning

confidence: 99%

Section: National/regionalized Approachmentioning

confidence: 99%

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A BIM–LCA Approach for the Whole Design Process of Green Buildings in the Chinese Context

Yang

Kohler

et al. 2023

Sustainability

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“…[6][7][8] Based on the form-invariant of Maxwell's equations and material interpretation, TO links both electromagnetic fields and media between the reference space and real space through the coordinate transformation. [9][10][11][12][13] The spatial beam bender designed by TO is often inhomogeneous and anisotropic, which is still challenging to realize. Choosing a suitable coordinate transformation can simplify the required materials.…”

Section: Introductionmentioning

confidence: 99%

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

Sun¹,

Liu²,

Yang³

et al. 2021

Chinese Phys. B

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By introducing an optic-null medium into the finite embedded transformation, a reflectionless spatial beam bender is designed, which can steer the output beam by a fixed pre-designed angle β for an arbitrary incident angle. The bending angle β of the beam bender is determined by the geometrical angle of the device, which can be changed by simply choosing different geometrical angles. For various bending angles, the designed spatial beam bender can be realized by the same materials (i.e., an optic-null medium), which is a homogenous anisotropic material. Numerical simulations verify the reflectionless bending effect and rotated imaging ability of the proposed beam bender. A reduction model of the optic-null medium is studied, which can also be used for a reflectionless spatial beam bender with a pre-designed bending angle.

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Homogeneous shrinking/amplifying device and its layered realization

Yang

Huang

et al. 2019

AIP Advances

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Arbitrary regular/irregular shaped electromagnetic shrinking device and amplifying device with homogeneous, non-negative, anisotropic and genetic constitutive parameters are proposed and designed based on linear transformation optics, which provides the flexibility for device designing, and closer to the practical implementation. Furthermore, layered structure based on effective medium theory is utilized to remove the anisotropic property of the proposed device. Simulation results show that when with sufficient layers, both the layered shrinking device and amplifying device behave nearly as perfect as the ideal one. A dielectric or magnetic object placed inside the proposed device will be visually transformed into another object with a bigger/smaller size and different constitutive parameters are figured out clearly, making the proposed device have potential applications in military camouflage or other field of electromagnetic engineering system. The shrinking/amplifying scale is tailored by the ratio of b/c (b and c are the quasi-radius of the arbitrarily shaped polygon). Composing of alternatively isotropic layers with positive material parameters would dramatically reduce the fabrication difficulty and move the device a step further towards the practical application.

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Homogeneous transparent device and its layered realization

Cited by 5 publications

References 39 publications

A BIM–LCA Approach for the Whole Design Process of Green Buildings in the Chinese Context

A BIM–LCA Approach for the Whole Design Process of Green Buildings in the Chinese Context

Reflectionless spatial beam benders with arbitrary bending angle by introducing optic-null medium into transformation optics*

Homogeneous shrinking/amplifying device and its layered realization

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