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  1. Artikel ; Online: Production Structure and Multiple Equilibria - A DSGE Perspective

    Hu Quan / Wang Siwei

    SHS Web of Conferences, Vol 163, p

    2023  Band 02030

    Abstract: This paper integrates the Austrian school’s production structure theory and financial market theory, considers the impact of heterogeneity of firms’ production cycles on economic fluctuations, constructs a DSGE model that incorporates production ... ...

    Abstract This paper integrates the Austrian school’s production structure theory and financial market theory, considers the impact of heterogeneity of firms’ production cycles on economic fluctuations, constructs a DSGE model that incorporates production structure, and uses the model to analyse the existence of multiple equilibria and endogenous financial economic cycles. Compared with previous DSGE models, this paper highlights the asymmetry of firms’ responses due to the existence of different production cycles and considers emotional shocks as the main source of economic volatility, as Keynes’ “animal spirits” suggest.
    Schlagwörter Social Sciences ; H
    Sprache Englisch
    Erscheinungsdatum 2023-01-01T00:00:00Z
    Verlag EDP Sciences
    Dokumenttyp Artikel ; Online
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  2. Artikel ; Online: Gap junctions: The missing piece of the connectome.

    Gutierrez, Gabrielle J / Wang, Siwei

    Current biology : CB

    2023  Band 33, Heft 15, Seite(n) R819–R822

    Abstract: The central pattern generator that controls flying power in Drosophila requires desynchronized firing to drive a steady wingbeat frequency. A new study reveals how gap junctions are the key to desynchronizing the motor neurons. ...

    Abstract The central pattern generator that controls flying power in Drosophila requires desynchronized firing to drive a steady wingbeat frequency. A new study reveals how gap junctions are the key to desynchronizing the motor neurons.
    Mesh-Begriff(e) Animals ; Connectome ; Gap Junctions ; Motor Neurons/physiology ; Drosophila
    Sprache Englisch
    Erscheinungsdatum 2023-08-08
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 1071731-6
    ISSN 1879-0445 ; 0960-9822
    ISSN (online) 1879-0445
    ISSN 0960-9822
    DOI 10.1016/j.cub.2023.06.058
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  3. Artikel ; Online: Restoring Treg/Th17 cell balance in ulcerative colitis through HRas silencing and MAPK pathway inhibition.

    Wang, Siwei / Su, Wenhao / Wu, Xiaohan / Dong, Weiguo

    International immunopharmacology

    2024  Band 130, Seite(n) 111608

    Abstract: This study investigates HRas-dependent mechanisms in the disruption of regulatory T (Treg) cells and T helper 17 (Th17) cells balance in ulcerative colitis (UC). Comprehensive RNA sequencing and bioinformatics analyses revealed elevated HRas and MAPK ... ...

    Abstract This study investigates HRas-dependent mechanisms in the disruption of regulatory T (Treg) cells and T helper 17 (Th17) cells balance in ulcerative colitis (UC). Comprehensive RNA sequencing and bioinformatics analyses revealed elevated HRas and MAPK pathway-related protein expression in UC samples. Using a murine UC model induced by dextran sulfate sodium (DSS), HRas silencing was found to promote Treg cell differentiation and suppress Th17 cell production, effectively restoring balance. Inactivation of the MAPK pathway played a pivotal role in this rebalancing effect. In vivo experiments further confirmed that HRas silencing mitigated colon tissue damage in DSS-induced mice, emphasizing its potential as a therapeutic strategy for UC.
    Mesh-Begriff(e) Animals ; Mice ; Colitis, Ulcerative/chemically induced ; Colitis, Ulcerative/genetics ; Colitis, Ulcerative/drug therapy ; Colon ; Th17 Cells ; T-Lymphocytes, Regulatory ; Cell Differentiation ; Dextran Sulfate/pharmacology ; Colitis/drug therapy ; Disease Models, Animal ; Mice, Inbred C57BL
    Chemische Substanzen Dextran Sulfate (9042-14-2)
    Sprache Englisch
    Erscheinungsdatum 2024-03-01
    Erscheinungsland Netherlands
    Dokumenttyp Journal Article
    ZDB-ID 2043785-7
    ISSN 1878-1705 ; 1567-5769
    ISSN (online) 1878-1705
    ISSN 1567-5769
    DOI 10.1016/j.intimp.2024.111608
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  4. Artikel ; Online: Environmental fate and safety analysis of methoxyfenozide application to control litchi and longan pests.

    Liu, Yanping / Wang, Xiaonan / Wang, Siwei

    Environmental science and pollution research international

    2024  

    Abstract: Litchi and longan pests significantly affect crop yield and quality. Chemical prevention and control are very effective for production; therefore, it is crucial to study fate assessment and appropriate field efficacy before pesticide application on crops ...

    Abstract Litchi and longan pests significantly affect crop yield and quality. Chemical prevention and control are very effective for production; therefore, it is crucial to study fate assessment and appropriate field efficacy before pesticide application on crops to appropriately assess the health and ecological risks linked with these agents. This study conducted Good Agricultural Practice (GAP) field trials and laboratory experiments to elucidate the dissipation, terminal residues, and efficacy of methoxyfenozide on litchi and longan in six locations throughout China. To detect methoxyfenozide residues on litchi and longan, a QuEChERS/UPLC-MS/MS-based method was designed. The initial methoxyfenozide levels in litchi and longan ranged from 2.21-2.86 to 0.83-0.95 mg kg
    Sprache Englisch
    Erscheinungsdatum 2024-05-21
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-024-33677-0
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  5. Dissertation / Habilitation ; Online: Quantum Dynamics of Molecular Spontaneous Emission Process in a Complex Dielectric Environment

    Wang, Siwei

    2020  

    Abstract: Molecular spontaneous emission altered by dielectric environments has attracted extensive attention in the area of chemical physics during 1970-1980. Recently, due to remarkable progress in nanotechnology, the spontaneous emission of a single molecule in ...

    Abstract Molecular spontaneous emission altered by dielectric environments has attracted extensive attention in the area of chemical physics during 1970-1980. Recently, due to remarkable progress in nanotechnology, the spontaneous emission of a single molecule in nanocavities have been experimentally realized, and strong light-matter interactions between molecules and surface plasmon polaritons (SPPs) have been observed. However, in the traditional methods, the molecule is treated as a two-level system and the light field follows the classical Maxwell's Equations. Under such a strong couplings regime, one needs to use a full quantum method to study the dynamics of molecules strongly coupled with SPPs. Therefore, we adopt an advanced technique named macroscopic quantum electrodynamics (mQED) to explore the following subjects: (i) non-Markovian quantum dynamics of a molecule strongly coupled with SPPs. (ii) coherent-to-incoherent transition of molecular fluorescence controlled by the molecule-silver distance. (iii) molecular emission power spectrum in a complex dielectric environment. When a molecular emitter is near a silver surface, the reabsorption of the emitted photon leads to the non-Markovian dynamics of the molecule. Based on mQED, we propose a theory including molecular vibrations, which is general for molecular fluorescence in the presence of arbitrary inhomogeneous, dispersive, and absorbing media. Base on the first subject, we further study the quantum dynamics of molecular fluorescence with varying the metal-molecule distance. A clear coherent-to-incoherent transition is observed with increasing the distance. Moreover, in the incoherent regime, we prove that the exponential decay rate predicted by mQED is identical to the rate based on traditional methods. Additionally, we find that the coherent-to-incoherent transition can be controlled by the permittivity of the dielectric spacer. In the third subject, we derive the formulae of molecular emission power spectra which reflect the quantum dynamics of molecular fluorescence. Furthermore, we prove that it can be divided into the electromagnetic environment factor and the line shape function. To demonstrate the validity of our theory, we obtain the analytical results of the line shape function in two limits. In the incoherent limit, the line shape function follows the Franck-Condon principle. In the coherent limit, the line shape function shows the Rabi splitting.
    Schlagwörter Molecular chemistry
    Thema/Rubrik (Code) 541
    Sprache ENG
    Erscheinungsdatum 2020-01-01 00:00:01.0
    Verlag Princeton University
    Erscheinungsland us
    Dokumenttyp Dissertation / Habilitation ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel ; Online: Dissipation and Safety Analysis of Dimethomorph Application in Lychee by High-Performance Liquid Chromatography-Tandem Mass Spectrometry with QuEChERS.

    Wang, Siwei / Wang, Xiaonan / Liu, Yanping / He, Qiang / Tian, Hai

    Molecules (Basel, Switzerland)

    2024  Band 29, Heft 8

    Abstract: This study presents a method for analyzing dimethomorph residues in lychee using QuEChERS extraction and HPLC-MS/MS. The validation parameters for this method, which include accuracy, precision, linearity, and recovery, indicate that it meets standard ... ...

    Abstract This study presents a method for analyzing dimethomorph residues in lychee using QuEChERS extraction and HPLC-MS/MS. The validation parameters for this method, which include accuracy, precision, linearity, and recovery, indicate that it meets standard validation requirements. Following first-order kinetics, the dissipation dynamic of dimethomorph in lychee was determined to range from 6.4 to 9.2 days. Analysis of terminal residues revealed that residues in whole lychee were substantially greater than those in the pulp, indicating that dimethomorph residues are predominantly concentrated in the peel. When applied twice and thrice at two dosage levels with pre-harvest intervals (PHIs) of 5, 7, and 10 days, the terminal residues in whole lychee ranged from 0.092 to 1.99 mg/kg. The terminal residues of the pulp ranged from 0.01 to 0.18 mg/kg, with the residue ratio of whole lychee to pulp consistently exceeding one. The risk quotient (RQ) for dimethomorph, even at the recommended dosage, was less than one, indicating that the potential for damage was negligible. This study contributes to the establishment of maximum residue limits (MRLs) in China by providing essential information on the safe application of dimethomorph in lychee orchards.
    Mesh-Begriff(e) Chromatography, High Pressure Liquid/methods ; Tandem Mass Spectrometry/methods ; Litchi/chemistry ; Morpholines/analysis ; Pesticide Residues/analysis ; Food Contamination/analysis
    Chemische Substanzen dimethomorph (3EXL2158GV) ; Morpholines ; Pesticide Residues
    Sprache Englisch
    Erscheinungsdatum 2024-04-19
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29081860
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  7. Artikel ; Online: Fast Incomplete Multi-View Clustering With View-Independent Anchors.

    Liu, Suyuan / Liu, Xinwang / Wang, Siwei / Niu, Xin / Zhu, En

    IEEE transactions on neural networks and learning systems

    2024  Band 35, Heft 6, Seite(n) 7740–7751

    Abstract: Multi-view clustering (MVC) methods aim to exploit consistent and complementary information among each view and achieve encouraging performance improvement than single-view counterparts. In practical applications, it is common to obtain instances with ... ...

    Abstract Multi-view clustering (MVC) methods aim to exploit consistent and complementary information among each view and achieve encouraging performance improvement than single-view counterparts. In practical applications, it is common to obtain instances with partially available information, raising researches of incomplete multi-view clustering (IMC) issues. Recently, several fast IMC methods have been proposed to process the large-scale partial data. Though with considerable acceleration, these methods seek view-shared anchors and ignore specific information among single views. To tackle the above issue, we propose a fast IMC with view-independent anchors (FIMVC-VIA) method in this article. Specifically, we learn individual anchors based on the diversity of distribution among each incomplete view and construct a unified anchor graph following the principle of consistent clustering structure. By constructing an anchor graph instead of pairwise full graph, the time and space complexities of our proposed FIMVC-VIA are proven to be linearly related to the number of samples, which can efficiently solve the large-scale task. The experiment performed on benchmarks with different missing rate illustrates the improvement in complexity and effectiveness of our method compared with other IMC methods. Our code is publicly available at https://github.com/Tracesource/ FIMVC-VIA.
    Sprache Englisch
    Erscheinungsdatum 2024-06-03
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2162-2388
    ISSN (online) 2162-2388
    DOI 10.1109/TNNLS.2022.3220486
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  8. Artikel ; Online: Adaptive Zone Learning for Weakly Supervised Object Localization.

    Chen, Zhiwei / Wang, Siwei / Cao, Liujuan / Shen, Yunhang / Ji, Rongrong

    IEEE transactions on neural networks and learning systems

    2024  Band PP

    Abstract: Weakly supervised object localization (WSOL) stands as a pivotal endeavor within the realm of computer vision, entailing the location of objects utilizing merely image-level labels. Contemporary approaches in WSOL have leveraged FPMs, yielding ... ...

    Abstract Weakly supervised object localization (WSOL) stands as a pivotal endeavor within the realm of computer vision, entailing the location of objects utilizing merely image-level labels. Contemporary approaches in WSOL have leveraged FPMs, yielding commendable outcomes. However, these existing FPM-based techniques are predominantly confined to rudimentary strategies of either augmenting the foreground or diminishing the background presence. We argue for the exploration and exploitation of the intricate interplay between the object's foreground and its background to achieve efficient object localization. In this manuscript, we introduce an innovative framework, termed adaptive zone learning (AZL), which operates on a coarse-to-fine basis to refine FPMs through a triad of adaptive zone mechanisms. First, an adversarial learning mechanism (ALM) is employed, orchestrating an interplay between the foreground and background regions. This mechanism accentuates coarse-grained object regions in a mutually adversarial manner. Subsequently, an oriented learning mechanism (OLM) is unveiled, which harnesses local insights from both foreground and background in a fine-grained manner. This mechanism is instrumental in delineating object regions with greater granularity, thereby generating better FPMs. Furthermore, we propose a reinforced learning mechanism (RLM) as the compensatory mechanism for adversarial design, by which the undesirable foreground maps are refined again. Extensive experiments on CUB-200-2011 and ILSVRC datasets demonstrate that AZL achieves significant and consistent performance improvements over other state-of-the-art WSOL methods.
    Sprache Englisch
    Erscheinungsdatum 2024-06-04
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 2162-2388
    ISSN (online) 2162-2388
    DOI 10.1109/TNNLS.2024.3392948
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  9. Buch ; Online: Towards understanding neural collapse in supervised contrastive learning with the information bottleneck method

    Wang, Siwei / Palmer, Stephanie E

    2023  

    Abstract: Neural collapse describes the geometry of activation in the final layer of a deep neural network when it is trained beyond performance plateaus. Open questions include whether neural collapse leads to better generalization and, if so, why and how ... ...

    Abstract Neural collapse describes the geometry of activation in the final layer of a deep neural network when it is trained beyond performance plateaus. Open questions include whether neural collapse leads to better generalization and, if so, why and how training beyond the plateau helps. We model neural collapse as an information bottleneck (IB) problem in order to investigate whether such a compact representation exists and discover its connection to generalization. We demonstrate that neural collapse leads to good generalization specifically when it approaches an optimal IB solution of the classification problem. Recent research has shown that two deep neural networks independently trained with the same contrastive loss objective are linearly identifiable, meaning that the resulting representations are equivalent up to a matrix transformation. We leverage linear identifiability to approximate an analytical solution of the IB problem. This approximation demonstrates that when class means exhibit $K$-simplex Equiangular Tight Frame (ETF) behavior (e.g., $K$=10 for CIFAR10 and $K$=100 for CIFAR100), they coincide with the critical phase transitions of the corresponding IB problem. The performance plateau occurs once the optimal solution for the IB problem includes all of these phase transitions. We also show that the resulting $K$-simplex ETF can be packed into a $K$-dimensional Gaussian distribution using supervised contrastive learning with a ResNet50 backbone. This geometry suggests that the $K$-simplex ETF learned by supervised contrastive learning approximates the optimal features for source coding. Hence, there is a direct correspondence between optimal IB solutions and generalization in contrastive learning.
    Schlagwörter Computer Science - Machine Learning ; Computer Science - Information Theory
    Thema/Rubrik (Code) 006
    Erscheinungsdatum 2023-05-19
    Erscheinungsland us
    Dokumenttyp Buch ; Online
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  10. Artikel ; Online: Safe Application of 75% Trifloxystrobin-Tebuconazole as Water-Dispersible Granules in Paddy Based on Residue and Dietary Risk Assessment.

    Wang, Siwei / Liu, Yanping / Zhu, Manshan

    Molecules (Basel, Switzerland)

    2023  Band 29, Heft 1

    Abstract: The present study describes the development of a highly effective approach for determining the residue distribution and dissipation of trifloxystrobin and tebuconazole, and their risk assessment in brown rice, husk, straw, and grain using high- ... ...

    Abstract The present study describes the development of a highly effective approach for determining the residue distribution and dissipation of trifloxystrobin and tebuconazole, and their risk assessment in brown rice, husk, straw, and grain using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The current study provides considerable novel information regarding the safe utilization of a mixture of trifloxystrobin and tebuconazole in paddy production. The samples demonstrated a range of mean recoveries between 72% and 86%, with a 1.1-9.2% relative standard deviation (RSD). The limits of quantification (LOQ) and half-lives (t
    Mesh-Begriff(e) Humans ; Tandem Mass Spectrometry ; Edible Grain ; Risk Assessment ; Water ; Triazoles ; Strobilurins ; Acetates ; Imines
    Chemische Substanzen tebuconazole (401ATW8TRW) ; trifloxystrobin (F625Z36B2D) ; Water (059QF0KO0R) ; Triazoles ; Strobilurins ; Acetates ; Imines
    Sprache Englisch
    Erscheinungsdatum 2023-12-27
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules29010163
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