102 research outputs found
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Youth Narrative in Feng Tang\u27s The Beijing Trilogy
In the past fifteen years, the Beijing writer Feng Tang has enjoyed great popularity, especially among young readers. As a versatile writer, he published not only novels but also essays and poems. His representative work is the semi-autobiographical The Beijing Trilogy which depicts the coming-of-age of a boy named Qiushui and his friends. The main theme of this trilogy is the growth of youth and thus establishes a youth narrative. Based on a close reading of the trilogy, this paper aims to explore the true nature of the youth narrative that Feng Tang presents in his The Beijing Trilogy. This paper is divided into five sections: section one introduces the writer Feng Tang and The Beijing Trilogy; section two discusses the feature of youth narrative in the realm of the genre bildungsroman; section three analyzes the counter-sublime tendency associated with the writer’s rebellion from the official discourse and mainstream ideology; section four focuses on the phallocentrism that is pervasive in the story; and section five is the conclusion
A PEL-type Igusa Stack and the -adic Geometry of Shimura Varieties
Let be a PEL-Shimura datum of type AC in Kottwitz's classification.
Assume is unramified. We show that the good reduction locus
of the infinite -level Shimura variety attached to this datum, considered as
a diamond, can be described as the fiber product of a certain v-stack (which we
call ``Igusa stack") with a Schubert cell of the corresponding
-affine Grassmannian, over the stack of -torsors on
the Fargues-Fontaine curve. We also construct a minimal compactification of the
Igusa stack and show that this fiber product structure extends to the minimal
compactification of the Shimura variety. When the Schubert cell of the affine
Grassmannian is replaced by a bounded substack of -shtukas, where
is a reductive model of over ,
we show that this fiber product recovers the integral model of the Shimura
variety. This result on integral models, if specialized to a Newton polygon
stratum, recovers the fiber product formula of Mantovan. Similar fiber product
structures are conjectured by Scholze to exist on general Shimura varieties.Comment: Comments welcome
Evolutionary Reinforcement Learning via Cooperative Coevolutionary Negatively Correlated Search
Evolutionary algorithms (EAs) have been successfully applied to optimize the
policies for Reinforcement Learning (RL) tasks due to their exploration
ability. The recently proposed Negatively Correlated Search (NCS) provides a
distinct parallel exploration search behavior and is expected to facilitate RL
more effectively. Considering that the commonly adopted neural policies usually
involves millions of parameters to be optimized, the direct application of NCS
to RL may face a great challenge of the large-scale search space. To address
this issue, this paper presents an NCS-friendly Cooperative Coevolution (CC)
framework to scale-up NCS while largely preserving its parallel exploration
search behavior. The issue of traditional CC that can deteriorate NCS is also
discussed. Empirical studies on 10 popular Atari games show that the proposed
method can significantly outperform three state-of-the-art deep RL methods with
50% less computational time by effectively exploring a 1.7 million-dimensional
search space
Cellulase Recycling after High-Solids Simultaneous Saccharification and Fermentation of Combined Pretreated Corncob
Despite the advantageous prospect of second-generation bioethanol, its final commercialization must overcome the primary cost impediment due to enzyme assumption. To solve this problem, this work achieves high-concentration ethanol fermentation and multi-round cellulase recycling through process integration. The optimal time and temperature of the re-adsorption process were determined by monitoring the adsorption kinetics of cellulases. Both glucose and cellobiose inhibited cellulase adsorption. After 96 h of ethanol fermentation, 40% of the initial cellulase remained in the broth, from which 62.5% of the cellulase can be recycled and reused in fresh substrate re-adsorption for 90 min. Under optimum conditions, i.e., pH 5.0, dry matter loading of 15 wt%, cellulase loading of 45 FPU/g glucan, two cycles of fermentation and re-adsorption can yield two-fold increased ethanol outputs and reduce enzyme costs by over 50%. The ethanol concentration in each cycle can be achieved at levels greater than 40 g/L
PRIOR: Personalized Prior for Reactivating the Information Overlooked in Federated Learning
Classical federated learning (FL) enables training machine learning models
without sharing data for privacy preservation, but heterogeneous data
characteristic degrades the performance of the localized model. Personalized FL
(PFL) addresses this by synthesizing personalized models from a global model
via training on local data. Such a global model may overlook the specific
information that the clients have been sampled. In this paper, we propose a
novel scheme to inject personalized prior knowledge into the global model in
each client, which attempts to mitigate the introduced incomplete information
problem in PFL. At the heart of our proposed approach is a framework, the PFL
with Bregman Divergence (pFedBreD), decoupling the personalized prior from the
local objective function regularized by Bregman divergence for greater
adaptability in personalized scenarios. We also relax the mirror descent (RMD)
to extract the prior explicitly to provide optional strategies. Additionally,
our pFedBreD is backed up by a convergence analysis. Sufficient experiments
demonstrate that our method reaches the state-of-the-art performances on 5
datasets and outperforms other methods by up to 3.5% across 8 benchmarks.
Extensive analyses verify the robustness and necessity of proposed designs.Comment: Accepted by NeurIPS 202
Geometry of the Wiman Pencil, I: Algebro-Geometric Aspects
In 1981 W.L. Edge discovered and studied a pencil of highly
symmetric genus projective curves with remarkable properties. Edge's work
was based on an 1895 paper of A. Wiman. Both papers were written in the
satisfying style of 19th century algebraic geometry. In this paper and its
sequel [FL], we consider from a more modern, conceptual
perspective, whereby explicit equations are reincarnated as geometric objects.Comment: Minor revisions. Now 49 pages, 4 figures. To appear in European
Journal of Mathematics, special issue in memory of W.L. Edg
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