Chemical Artificial Intelligence (CAI) is the burgeoning research field devising chemical systems in "wetware" (i.e., in liquid solutions) to mimic biological intelligence competencies. UV-visible radiation ...
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Chemical Artificial Intelligence (CAI) is the burgeoning research field devising chemical systems in "wetware" (i.e., in liquid solutions) to mimic biological intelligence competencies. UV-visible radiation is valuable for maintaining those systems out-of-equilibrium, prompting them to respond to optical and other physicochemical signals and probing their evolution. As it occurs in all the kingdoms of life, photochromic compounds play a relevant role. Several living beings exploit photochromic switches for variegate responses to the features of the environmental light. This work proposes a plausible justification by evidencing how each photochrome can be conceived as a trivial form of Markov blanket and implement (i) forward, (ii) final, and (iii) circular causalities. Furthermore, photochromic materials are appropriate for processing Boolean and fuzzy logic, exploiting their chemical reactivity, chaos, and quantum computing. Finally, photochromic molecules and oscillatory chemical reactions are promising ingredients for developing neuromorphic engineering in wetware based on optical signals. CAI inspires the design of adaptive, active, and autonomous chemical systems, which help humanity to colonize the molecular world against diseases, pollution, and poverty.
We present a new approach for the tolerancing of correlated opticalsystems. These systems consist of at least two optical channels, which are linked together. To represent the correlations e.g., for compensators corr...
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ISBN:
(纸本)9781510673571;9781510673564
We present a new approach for the tolerancing of correlated opticalsystems. These systems consist of at least two optical channels, which are linked together. To represent the correlations e.g., for compensators correctly in the tolerancing procedure, tabulated pseudo random numbers are used. This leads to efficient tolerancing and accurate results.
These days, nothing lasts very long, and things often change for the better, but there are sure things in our community, such as this annual event, which has been going on for 25 years. The first edition in 2000 of th...
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ISBN:
(纸本)9781510679221;9781510679238
These days, nothing lasts very long, and things often change for the better, but there are sure things in our community, such as this annual event, which has been going on for 25 years. The first edition in 2000 of the Current Developments in Lens design and opticalsystemsengineeringconference took place during International Symposium on optical science and technology, 30 July - 4 August 2000 in San Diego. Over 45 oral presentations and ten posters were presented. The chairs were Robert E. Fischer, Warren J. Smith, R. Barry Johnson, and William H. Swantner. The proceeding was numbered 4093 and 24 years later the number is 12666 (2023). This paper looks back on the great moments of our conference, its speakers, the subjects that have come and gone, and those that have remained.
In order to quickly realize the composite optical axis stabilization, this article develops a RTX-based Rapid Control Prototyping (RCP) system. The composite optical axis stabilization consists of inertial and optical...
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ISBN:
(纸本)9798350375084;9798350375077
In order to quickly realize the composite optical axis stabilization, this article develops a RTX-based Rapid Control Prototyping (RCP) system. The composite optical axis stabilization consists of inertial and optical-mechanical image stabilization, by reasonably decomposing the control range of which, the stabilization accuracy of the optical axis is improved. The RTX shared memory technology is used to separate the real-time domain from the non-real-time domain, realizing the real-time control and communication of each controller, and effectively improving the control bandwidth of the system. Experimental test shows that the real-time performance of the RCP platform meets the requirements, achieving functions such as the identification, control and testing of the composite optical axis stabilization system. Due to the generic design, the RCP platform is able to support subsequent control systems of the same type.
In order to efficiently apply Wireless Power Transfer (WPT) technology in photovoltaic (PV) systems, mathematical modeling and mechanism analysis of Magnetic Coupling Resonant Wireless Power Transfer (MCR-WPT) systems...
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A new method for glass substitution during the lens design has been developed. Exploring existing longitudinal aberration contributions, the new method uses sensitivity analysis to find optimal optical glass constants...
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ISBN:
(纸本)9781510673571;9781510673564
A new method for glass substitution during the lens design has been developed. Exploring existing longitudinal aberration contributions, the new method uses sensitivity analysis to find optimal optical glass constants (refractive index, Abbe number, and relative partial dispersion) for certain optical system elements. A case study introducing the glass substitution method to the optical system design is described. It is shown that the new approach provides step-by-step improvements in the optical system's longitudinal aberration correction. The current limitations of the method are also described.
For the design of well corrected opticalsystems with a certain spectral bandwidth, it is often not sufficient to only control axial and lateral color, but also chromatic variations of the fourth order wave aberration...
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ISBN:
(纸本)9781510673571;9781510673564
For the design of well corrected opticalsystems with a certain spectral bandwidth, it is often not sufficient to only control axial and lateral color, but also chromatic variations of the fourth order wave aberrations or Seidel coefficients need to be considered. This has already been studied in detail in the literature by Berner. We propose a different approach to calculate the induced surface contributions to chromatic variations of the Seidel coefficients, which is based on the principles of stop and object shift. This offers a different perspective that might be helpful for opticaldesigners. Furthermore, it is demonstrated how this approach generalizes to other cases of tolerance sensitivities of rotationally symmetric systems.
The possibility of buckling, and avoidance of associated consequences, are issues that have engaged researchers in the field of structural engineering since the eighteenth century, when the Swiss mathematician Leonhar...
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The possibility of buckling, and avoidance of associated consequences, are issues that have engaged researchers in the field of structural engineering since the eighteenth century, when the Swiss mathematician Leonhard Euler first formulated his theory on the buckling of struts. In more recent times, research efforts have generally aimed at (i) enhancing understanding of buckling phenomena in materials, structures and structural systems, (ii) developing analytical, numerical and experimental methods for determining the buckling resistance of structural elements, and (iii) developing rules and guidelines for the practical design of structural members to withstand buckling. This article is an overview of a special issue on advances in buckling, based on papers that were presented at the Eighth International conference on Structural engineering, Mechanics and Computation (Cape Town, 5-7 September 2022). Between them, the articles provide new insights on buckling behaviour, alternative methods of analysis and design, and novel or more efficient techniques for experimental testing and numerical modelling.
Spherical arrangement is a common way to pack lens arrays. Due to the restriction of original structures, the previous optimization methods based on icosahedral subdivision are only applicable to a few types of lens a...
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Spherical arrangement is a common way to pack lens arrays. Due to the restriction of original structures, the previous optimization methods based on icosahedral subdivision are only applicable to a few types of lens arrays adopting different numbers of sub-lenses. In order to design more types of lens arrays, an optimization packing method is proposed with the vertices of class ii and class iiI geodesic polyhedra as the arrangement positions of sub-lenses. The vertices of the geodesic polyhedron are generated by projecting grid nodes on each face of the ortho-icosahedron to a sphere. The vertex translation function is established in a barycentric coordinate system, and then the chord ratio and packing density are used as evaluation functions to optimize the vertices' positions. The universality of the optimization method is tested, and its robustness is certified by analyzing the optimization results of different original structures with the same number of vertices. Finally, the effectiveness and feasibility of the optimization method in engineering applications are demonstrated in a monocentric multi-scale imaging system. The optimization method proposed in this paper can significantly increase the types of lens arrays from 9 to 37 types, adopting different numbers of sub-lenses within 1000 and effectively improved the distribution uniformity of lens arrays.
Discrete molecular organometallic europium(ii) complexes are promising functional materials due to their ability to behave as highly sensitive band-shift luminescence thermometers. Furthering our understanding of the ...
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Discrete molecular organometallic europium(ii) complexes are promising functional materials due to their ability to behave as highly sensitive band-shift luminescence thermometers. Furthering our understanding of the design principles salient to the emission behavior of such systems is important for developing them in this emerging application. To this end, a series of pseudo-C 4v -symmetric organometallic europium(ii) complexes bearing systematically varying ligand sets were synthesized and characterized to probe the influence of subtle structural modification on their optical properties. Opto-structural correlation analyses via variable-temperature single-crystal X-ray diffraction and photoluminescence spectroscopy reveal a remarkable variability in properties among structurally similar complexes and a convoluted dependence of the emission characteristics on the stereoelectronic properties of the ligands. A few factors of particular influence are nevertheless identified, including the distance between the europium(ii) ion and the basal plane of the square-pyramidal coordination polyhedron, the presence of pendant electron density that might further interact with the excited-state 5d orbitals, and, qualitatively, the metal-ligand flexibility of the construct. These results help to elucidate principles that govern the luminescence properties of organometallic europium(ii) complexes with an eye to enabling the rational design of high-performance luminescence thermometers of this genre.
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