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"Wu, Yue"
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Facial Landmark Detection: A Literature Survey
The locations of the fiducial facial landmark points around facial components and facial contour capture the rigid and non-rigid facial deformations due to head movements and facial expressions. They are hence important for various facial analysis tasks. Many facial landmark detection algorithms have been developed to automatically detect those key points over the years, and in this paper, we perform an extensive review of them. We classify the facial landmark detection algorithms into three major categories: holistic methods, Constrained Local Model (CLM) methods, and the regression-based methods. They differ in the ways to utilize the facial appearance and shape information. The holistic methods explicitly build models to represent the global facial appearance and shape information. The CLMs explicitly leverage the global shape model but build the local appearance models. The regression based methods implicitly capture facial shape and appearance information. For algorithms within each category, we discuss their underlying theories as well as their differences. We also compare their performances on both controlled and in the wild benchmark datasets, under varying facial expressions, head poses, and occlusion. Based on the evaluations, we point out their respective strengths and weaknesses. There is also a separate section to review the latest deep learning based algorithms. The survey also includes a listing of the benchmark databases and existing software. Finally, we identify future research directions, including combining methods in different categories to leverage their respective strengths to solve landmark detection “in-the-wild”.
Journal Article
Ultrabroad Microwave Absorption Ability and Infrared Stealth Property of Nano-Micro CuS@rGO Lightweight Aerogels
HighlightsThe CuS@rGO composite aerogel can achieve the broad effective absorption bandwidth (EAB) of 8.44 GHz with the filler content of 6 wt%.The RLmin of CuS@rGO composite aerogel is -55.1 dB and EAB is 7.2 GHz with the filler content of 2 wt% by ascorbic acid thermal reduction. The radar cross-section reduction value of CuS@rGO composite aerogel can reach 53.3 dB m2.The CuS@rGO composite aerogels possess lightweight, compression and recovery, radar-infrared compatible stealth properties. Developing ultrabroad radar-infrared compatible stealth materials has turned into a research hotspot, which is still a problem to be solved. Herein, the copper sulfide wrapped by reduced graphene oxide to obtain three-dimensional (3D) porous network composite aerogels (CuS@rGO) were synthesized via thermal reduction ways (hydrothermal, ascorbic acid reduction) and freeze-drying strategy. It was discovered that the phase components (rGO and CuS phases) and micro/nano structure (microporous and nanosheet) were well-modified by modulating the additive amounts of CuS and changing the reduction ways, which resulted in the variation of the pore structure, defects, complex permittivity, microwave absorption, radar cross section (RCS) reduction value and infrared (IR) emissivity. Notably, the obtained CuS@rGO aerogels with a single dielectric loss type can achieve an ultrabroad bandwidth of 8.44 GHz at 2.8 mm with the low filler content of 6 wt% by a hydrothermal method. Besides, the composite aerogel via the ascorbic acid reduction realizes the minimum reflection loss (RLmin) of − 60.3 dB with the lower filler content of 2 wt%. The RCS reduction value can reach 53.3 dB m2, which effectively reduces the probability of the target being detected by the radar detector. Furthermore, the laminated porous architecture and multicomponent endowed composite aerogels with thermal insulation and IR stealth versatility. Thus, this work offers a facile method to design and develop porous rGO-based composite aerogel absorbers with radar-IR compatible stealth.
Journal Article
Sound and shadow inheritance of urban memory:Research on the Role of Radio and Television Broadcasters & Presenters in the Construction of Historical and Cultural Memory and Media Practice
The aim of the present study is to explore the role of radio and television broadcasters & presenters in the construction of urban historical memory, especially how their participation influences this process through oral history and media practice. Through in-depth interviews with more than ten radio and television broadcasters & presenters, this paper will Code and analyze the materials to reveal how they act as guardians and disseminators of urban memory and, therefore, influence the inheritance and development of urban culture through professional practice. In addition, the study will explore the interactive relationship between media and urban development and how this interaction can jointly promote overall social progress. Through this study, we hope to provide a new perspective on the construction mechanism of urban cultural memory, as well as theoretical support and practical guidance for the development and dissemination of urban culture.
Journal Article
The Sacred in the Mud: On Downward Transcendence in Religious and Spiritual Experience
Although there has been an increasing focus on religious and spiritual experience in literary studies within the context of post-critical and post-secular movements, much of the research is framed around the idea of “upward transcendence” in redemption narratives. This focus tends to overlook the negative aspects of life, such as absurdity, meaninglessness, and existential anxiety. Furthermore, it frequently resonates with capitalist ideals that champion a “seamless existence” while dismissing the unrefined essence of materiality. This article engages in two main tasks: First, it emphasizes the negative dimensions of religious and spiritual experience, drawing on Slavoj Žižek’s interpretation of theological and non-theological literature. Second, it expands the definition and scope of religious and spiritual experience, proposing an alternative paradigm based on absurdity and meaninglessness. This paradigm, “downward transcendence,” rejects the redemptive promise of “ascension” and redefines the sacred by engaging with the disruptive and unsettling fabric of existence, reconstructing the coordinates of the sacred within the fissures of reality. Through the case study of Sartre’s Nausea, the article explores how existential absurdity and meaninglessness can reconfigure the sacred, particularly through marginality and the transformative potential of negative experiences. It ultimately proposes downward transcendence as a radical reimagining of spiritual and existential freedom.
Journal Article
Autophagy and Macrophage Functions: Inflammatory Response and Phagocytosis
Autophagy is a conserved bulk degradation and recycling process that plays important roles in multiple biological functions, including inflammatory responses. As an important component of the innate immune system, macrophages are involved in defending cells from invading pathogens, clearing cellular debris, and regulating inflammatory responses. During the past two decades, accumulated evidence has revealed the intrinsic connection between autophagy and macrophage function. This review focuses on the role of autophagy, both as nonselective and selective forms, in the regulation of the inflammatory and phagocytotic functions of macrophages. Specifically, the roles of autophagy in pattern recognition, cytokine release, inflammasome activation, macrophage polarization, LC3-associated phagocytosis, and xenophagy are comprehensively reviewed. The roles of autophagy receptors in the macrophage function regulation are also summarized. Finally, the obstacles and remaining questions regarding the molecular regulation mechanisms, disease association, and therapeutic applications are discussed.
Journal Article
An investigation of how perceived smart tourism technologies affect tourists’ well-being in marine tourism
Tourism industry is the first of the five happiness industries, playing a crucial role in enhancing people’s well-being and happiness. Its high-quality development cannot be achieved without the use of emerging technologies, and today people have greatly improved the quality and happiness of tourism through smartphones, artificial intelligence, virtual reality and other technologies. Building smart marine tourism also requires widespread use of smart tourism technology. The study aims to examine the implications of perceived smart tourism technologies for tourist well-being in marine tourism, as well as the mediating role memorable tourism experiences play. We collected 445 valid questionnaires through a combination of offline and online methods and developed a theoretical model based on the results. The SPSS 26 statistical software package and Amos were applied in data analysis. There is a significant positive impact of perceived smart tourism technology on both hedonic and eudaimonic well-being of tourists in marine tourism, which is partially mediated by memorable tourism experiences. This paper provides certain suggestions and insights into the construction of smart marine tourism, so that managers can pay more attention to the experience and well-being of tourists and build a humanized, diversified, intelligent and innovative marine tourism. For smart tourism technology suppliers, it can provide them with new ideas for technological improvement, so that they can provide better services and attract more tourists in a market-oriented environment.
Journal Article
Erasure conversion for fault-tolerant quantum computing in alkaline earth Rydberg atom arrays
Executing quantum algorithms on error-corrected logical qubits is a critical step for scalable quantum computing, but the requisite numbers of qubits and physical error rates are demanding for current experimental hardware. Recently, the development of error correcting codes tailored to particular physical noise models has helped relax these requirements. In this work, we propose a qubit encoding and gate protocol for
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Yb neutral atom qubits that converts the dominant physical errors into erasures, that is, errors in known locations. The key idea is to encode qubits in a metastable electronic level, such that gate errors predominantly result in transitions to disjoint subspaces whose populations can be continuously monitored via fluorescence. We estimate that 98% of errors can be converted into erasures. We quantify the benefit of this approach via circuit-level simulations of the surface code, finding a threshold increase from 0.937% to 4.15%. We also observe a larger code distance near the threshold, leading to a faster decrease in the logical error rate for the same number of physical qubits, which is important for near-term implementations. Erasure conversion should benefit any error correcting code, and may also be applied to design new gates and encodings in other qubit platforms.
In quantum computing, realistic error models can allow tailored correction schemes for specific platforms. Here, while considering the case of qubits encoded in metastable electronic levels of atomic arrays, the authors propose a way to convert a large fraction of occurring errors into detectable leakages, or erasure errors, which are vastly easier to correct.
Journal Article
Energy cascade in the Garrett–Munk spectrum of internal gravity waves
We study the spectral energy transfer due to wave–triad interactions in the Garrett–Munk spectrum of internal gravity waves based on a numerical evaluation of the collision integral in the wave kinetic equation. Our numerical evaluation builds on the reduction of the collision integral on the resonant manifold for a horizontally isotropic spectrum. We evaluate directly the downscale energy flux available for ocean mixing, whose value is in close agreement with the finescale parameterization. We further decompose the energy transfer into contributions from different mechanisms, including local interactions and three types of non-local interactions, namely parametric subharmonic instability, elastic scattering (ES) and induced diffusion (ID). Through analysis on the role of each mechanism, we resolve two long-standing paradoxes regarding the mechanism for forward cascade in frequency and zero ID flux for the GM76 spectrum. In addition, our analysis estimates the contribution of each mechanism to the energy transfer in each spectral direction, and reveals new understanding of the importance of local interactions and ES in the energy transfer.
Journal Article
Hyperunified field theory and gravitational gauge–geometry duality
A hyperunified field theory is built in detail based on the postulates of gauge invariance and coordinate independence along with the conformal scaling symmetry. All elementary particles are merged into a single hyper-spinor field and all basic forces are unified into a fundamental interaction governed by the hyper-spin gauge symmetry SP(1, Dh-1). The dimension Dh of hyper-spacetime is conjectured to have a physical origin in correlation with the hyper-spin charge of elementary particles. The hyper-gravifield fiber bundle structure of biframe hyper-spacetime appears naturally with the globally flat Minkowski hyper-spacetime as a base spacetime and the locally flat hyper-gravifield spacetime as a fiber that is viewed as a dynamically emerged hyper-spacetime characterized by a non-commutative geometry. The gravitational origin of gauge symmetry is revealed with the hyper-gravifield that plays an essential role as a Goldstone-like field. The gauge–gravity and gravity–geometry correspondences bring about the gravitational gauge–geometry duality. The basic properties of hyperunified field theory and the issue on the fundamental scale are analyzed within the framework of quantum field theory, which allows us to describe the laws of nature in deriving the gauge gravitational equation with the conserved current and the geometric gravitational equations of Einstein-like type and beyond.
Journal Article