- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Correlations among lighting quality metrics for interior lighting
摘要： Correlations between selected lighting quality metrics derived from the spectrum were computed and interpreted for a representative set of interior light source spectra. Metrics of brightness and the melanopic effect were strongly correlated with each other but not with the metrics of colour quality. Results can be used to establish a two-dimensional diagram with criterion values to ensure the general user acceptance of a lighting system. This diagram can be extended in the future by further metrics describing light intensity and spatial and temporal distributions. Relationships between lighting quality metrics and colorimetric quantities as well as photoreceptor signal values are also shown.
关键词： lighting quality metrics,spectral design,correlations,human-centric lighting,interior lighting
更新于2025-09-23 15:23:52
-
[Advances in Intelligent Systems and Computing] Artificial Intelligence on Fashion and Textiles Volume 849 (Proceedings of the Artificial Intelligence on Fashion and Textiles (AIFT) Conference 2018, Hong Kong, July 3–6, 2018) || Woven Light: An Investigation of Woven Photonic Textiles
摘要： Textile materials, which have been widely used in apparel, interior design, health care, automobile, and infrastructure, play a fundamental role and exhibit a close relationship to human’s daily life. For the past few decades, smart textile materials with new performance, functionality, and design values have been developed through the integration of advanced technologies [1]. This study aims to review and examine current approaches to realize photonic textiles, including LED-embedded, photoluminescent, and polymeric optical fiber (POF) textiles. This work also reviews examples of woven interactive textiles and discusses how weave parameters can affect POF textiles. POF textiles, which exhibit the advantage of directly incorporating functional fibers during the fabrication process, have the potential to serve as a flexible textile display. In addition, this material provides high design values due to its dynamic visual appearance. One of the fabrication methods used to produce POF textiles is the weaving technique. The properties of smart textiles, including hand feel, elasticity, flexibility, and drapability, can be considerably changed through the interplay among weaving variables, such as fiber content, patterns, weave structures, fabric construction, and finishing techniques. Complex woven structures can be designed to simplify the production process; novel yarns can be used to provide variety to textile appearance and tactility. However, few studies have been conducted on the fabrication process of smart textiles through weaving. Tan and Bai developed prototypes of interactive cushions using POF textiles integrated with touch sensors [2, 3]. The design process of these prototypes focuses on the integration of electronic components and interactivity instead of on the textile fabrication method. A literature review indicates that research on the weaving structures of POF textiles is lacking. The use of weaving techniques to create innovations for smart textiles to enhance their appearance, performance, and functionality demonstrates potential.
关键词： Interactive photonic textile,Weaving,Textile design
更新于2025-09-23 15:23:52
-
Functional requirements of automotive head-up displays: A systematic review of literature from 1994 to present
摘要： Despite the long history of automotive head-up displays (HUDs), what information they should display in different situations to best serve the driver remains unanswered. The lack of understanding hinders designing useful automotive HUD systems. In an effort to address this, the current study investigated the developer, researcher and user perspectives on the functional requirements of automotive HUDs through literature review. The review results indicated that: 1) the existing commercial HUDs perform largely the same functions as the conventional in-vehicle displays, 2) past research studies proposed various HUD functions for improving driver situation awareness and driving safety, 3) autonomous driving and other new technologies are giving rise to new HUD information, and 4) little research is currently available on HUD users’ perceived information needs. Based on the review results, this study provides insights into the functional requirements of automotive HUDs and also suggests some future research directions for automotive HUD design.
关键词： Automotive head-up displays,Functional requirements,Head-up display design
更新于2025-09-23 15:23:52
-
Design and fabrication of the ultrathin metallic film based infrared selective radiator
摘要： Selective radiators have received considerable research attention and been extensively applied in many areas, such as thermophotovoltaic systems, infrared cloaking and sensing. Herein, the design of the infrared selective radiator based on ultrathin metallic films was fully demonstrated. From the discussions on the radiative characteristic and growth law of the metallic film, it has been concluded that a continuous ultrathin metallic film can behave as a thermal radiation enhancer. Taking the radiative cooling technology as the application background, a multilayered broadband selective radiator, consisting of an ultrathin Ag film and dielectric Ge films is designed and fabricated. The proposed radiator, which can radiate selectively in the 8–13 μm atmospheric transparency window (ε5–8 μm = 0.21; ε8–13 μm = 0.84; ε13–25 μm = 0.39), achieves an average temperature reduction of 3.5 °C under outdoor conditions and exhibits potential application in radiative cooling technology. Moreover, for our proposed selective radiator, flexible tuning of radiative characteristics can be achieved via structural design, which paves the way for its application in various areas. Unlike the common metamaterial based thermal radiator, our selective radiator with a planar structure is free from the complicated process of lithography or etching and is scalable to realize large-area fabrication and application.
关键词： Structural design,Radiative cooling,Selective radiator,Ultrathin metallic film
更新于2025-09-23 15:23:52
-
A performance and technoeconomic study of different geometrical designs of compact single-pass cross-matrix solar air collector with square-tube absorbers
摘要： This manuscript presents a performance study on a forced convection single-pass solar air heater channel with compact cross-matrix absorber (CMA) incorporating metal hollow square-tube absorbers. Four different geometries of CMA (Type I, II, III and IV) were investigated experimentally to evaluate their efficiency, pressure drops and heat transfer parameters. The experiments were conducted with uniform heat flux (indoor) and outdoor solar radiation as heat source. The air mass flow rates used were between 0.0142 kg/s and 0.0360 kg/s. Techno-economic feasibility studies were conducted using cost-benefit ratio (AC/AEG) method. Thermal efficiency of the CMA obtained by Type I with 76%, being the highest. CMA Type I also exhibited the highest temperature elevation than other configurations with 15.3 °C and thermal capacity of 38.7 kJ. Maximum pressure drop obtained was 1.33 Pa in turbulent condition with Reynolds number of 50,794. Type I has the advantage of high performance CMA and has comparatively lower cost-benefit ratio (AC/AEG) of 0.15 RM/kWh than other type of thermal absorbers.
关键词： Thermal absorber design,Solar air collector,Cross-matrix absorber
更新于2025-09-23 15:23:52
-
Inverse design and demonstration of broadband grating couplers
摘要： We present a gradient-based optimization strategy to design broadband grating couplers. Using this method, we are able to reach, and often surpass, a user-specified target bandwidth during optimization. The designs produced for 220 nm silicon-on-insulator are capable of achieving 3 dB bandwidths exceeding 100 nm while maintaining central coupling efficiencies ranging from -3.0 dB to -5.4 dB, depending on partial-etch fraction. We fabricate a subset of these structures and experimentally demonstrate gratings with 3 dB bandwidths exceeding 120 nm. This inverse design approach provides a flexible design paradigm, allowing for the creation of broadband grating couplers without requiring constraints on grating geometry.
关键词： inverse design,optimization,broadband,fiber-packaging,grating couplers
更新于2025-09-23 15:23:52
-
Dispersion flattened extremely high-birefringent kagome lattice elliptic core photonic crystal fiber in THz regime
摘要： A highly birefringent elliptic porous-core photonic crystal fiber with kagome lattice cladding has been presented for terahertz (THz) wave transmission. The slotted airholes inside the elliptic core effectively disrupt the symmetry of the porous-core which offers extremely high modal birefringence whereas the kagome cladding structure results in significantly low effective material loss (EML). The birefringence of the proposed structure is 9.73 × 10?2 for y-polarized mode at an operating frequency of 1 THz. The suggested structure also provides very flat dispersion over a bandwidth of 300 GHz. It is highly expected that this elliptic core waveguide would be remarkably useful in numerous polarization maintaining THz applications.
关键词： Photonic crystal fibers,Microstructured fibers,Fibres, polarization-maintaining,Optical communications,Fiber design and fabrication
更新于2025-09-23 15:23:52
-
Ab Initio Design of Graphene Block Enables Ultrasensitivity, Multimeter-Like Range Switchable Pressure Sensor
摘要： In pursuit of the next-generation pressure sensors, the fabrication of graphene-based devices is considered to be one of the most promising approaches to address the unsatisfied sensitivity within a wide pressure range. Here, an ab initio design based on the graphene block is proposed to realize a high-performance and multimeter-like range switchable pressure sensor. The sensor contains three designed graphene-based foams with different initial resistances, which enable continuous resistance-change behavior induced by the pressure. Specifically, the reduced graphene oxide (rGO) foam–based sensor demonstrates a three times resistance change within the pressure range of 0–300 Pa, the rGO/polyurethane (rGO/PU) foam–based sensor presents a six times resistance change within the pressure range of 0.09–30 kPa, and the selenium-functionalized rGO/PU (SFrGO/PU) foam–based sensor displays a resistance change of more than 1000-fold within the pressure range of 1–72 kPa. Such different initial resistances and responses endow the device with controllable estimating pressure ranges, offering a switchable multimeter-like function for various applications. This ab initio design, which is applicable to various 2D materials and operation modes, can provide a facile and feasible approach toward the next-generation pressure sensors and other application fields related to 2D materials.
关键词： ultrahigh sensitivity,pressure sensor,graphene block,ab initio design,multimeter-like
更新于2025-09-23 15:23:52
-
Ultra-low-distortion optical system design based on tolerance sensitivity optimization
摘要： This study theoretically analyzed the relationship between the primary aberrations and tolerances to meet the distortion requirements of an ultra-low-distortion optical system. Theoretical analysis shows that the distortion sensitivities of the optical system are related to the primary aberrations of the optical surfaces. Consequently, a method of optimizing the primary aberrations on the surface of the optical system to reduce the distortion sensitivities of sensitive tolerances is proposed. A distortion sensitivity analysis of manufacturing and assembly tolerance was carried out for the designed ultra-low-distortion and telecentric optical system. The distortion sensitivities of the sensitive tolerances were reduced by optimizing the primary aberrations on the surface of the optical system. A Monte Carlo analysis of the optimized ultra-low-distortion optical system showed that the proposed method has a remarkable effect on the distortion sensitivity optimization of the tolerances.
关键词： primary aberration,ultra-low distortion,optimization,tolerance sensitivity,optical design
更新于2025-09-23 15:23:52
-
Hemithioindigos for cellular photopharmacology: desymmetrised molecular switch scaffolds enabling design control over the isomer-dependency of potent antimitotic bioactivity
摘要： Druglike small molecules with photoswitchable bioactivity – photopharmaceuticals – allow biologists to perform studies with exquisitely precise and reversible, spatial and temporal control over critical biological systems inaccessible to genetic manipulation. The photoresponsive pharmacophores disclosed have been almost exclusively azobenzenes, which has limited the structural and substituent scope of photopharmacology. More detrimentally, for azobenzene reagents, it is not researchers’ needs for adapted experimental tools, but rather protein binding site sterics, that typically force whether the trans (dark) or cis (lit) isomer is the more bioactive. We now present first hemithioindigo-based pharmacophores enabling photoswitchable control over endogenous biological activity in cellulo. HOTubs optically control microtubule depolymerisation and cell death in unmodified mammalian cells. Notably, we show how the asymmetry of hemithioindigos allows a priori design of either Z- or E- (dark- or lit)-toxic antimitotics, whereas the corresponding azobenzenes are exclusively lit-toxic. We thus demonstrate that hemithioindigos enable an important expansion of the substituent and design scope of photopharmacological interventions for biological systems.
关键词： Photopharmacology,Drug design,Photochromism,Cytoskeleton,Antiproliferation
更新于2025-09-23 15:23:52