231 research outputs found
20,082,026
The whole idea of my work came from me questioning about the relationship between industrialization and human beings. Our generation look and think conforming to a public standard. When being asked question our answer is not based on our preferences, but whether it matches what we’ve been taught
Research on the Similarities between the Plot of Ji Chun Tai and Content of Sichuan Opera
Ji Chun Tai is the masterpiece of Sichuan dialect on late Qing Dynasty, composed of 40 vernacular short stories. It is divided into four parts, namely, Yuan Ji, Heng Ji, Li Ji, and Zhen Ji. Each part contains ten short stories. The author of Ji Chun Tai is a literator from Zhong Jiang who failed in imperial examination System in late Qing Dynasty. There are a large number of Sichuan Opera elements in those forty vernacular short stories. Generally speaking, the plot of Ji Chun Tai is full of ups and downs, together with relatively concentrated conflicts, which reflects the characteristics of Sichuan opera. Besides, the thought of persuasion and punishment, strong superstitious color, and detective story in Ji Chui Tai are combined together to reflect the characteristics of Sichuan Opera
Watertightization of Trimmed Surfaces at Intersection Boundary
This paper introduces a watertight technique to deal with the boundary
representation of surface-surface intersection in CAD.
Surfaces play an important role in today's geometric design. The mathematical
model of non-uniform rational B-spline surfaces (NURBS) is the mainstream and
ISO standard. In the situation of surface-surface intersection, things are a
little complicated, for some parts of surfaces may be cut-off, so called
trimmed surfaces occur, which is the central topic in the past decades in CAD
community of both academia and industry. The main problem is that the
parametric domain of the trimmed surface generally is not the standard square
or rectangle, and rather, typically, bounded by curves, based on point inverse
of the intersection points and interpolated. The existence of gaps or overlaps
at the intersection boundary makes hard the preprocessing of CAE and other
downstream applications. The NURBS are in this case hard to keep a closed form.
In common, a special data structure of intersection curves must be affiliated
to support downstream applications, while the data structure of the whole CAD
system is not unified, and the calculation is not efficient.
In terms of Bezier surface, a special case of NURBS, this paper designs a
reparameterization or normalization to transform the trimmed surface into a
group of Bezier surface patches in standard parametric domain [0,1]X[0,1]. And
then the boundary curve of normalized Bezier surface patch can be replaced by
the intersection curve to realize watertight along the boundary. In this way,
the trimmed surface is wiped out, the "gap" between CAD and CAE is closed.Comment: 10 pages,6 figure
Kinetin induces microtubular breakdown, cell cycle arrest and programmed cell death in tobacco BY-2 cells
Plant cells can undergo regulated cell death in response to exogenous factors (often in a stress context), but also as regular element of development (often regulated by phytohormones). The cellular aspects of these death responses differ, which implies that the early signalling must be different. We use cytokinin-induced programmed cell death as paradigm to get insight into the role of the cytoskeleton for the regulation of developmentally induced cell death, using tobacco BY-2 cells as experimental model. We show that this PCD in response to kinetin correlates with an arrest of the cell cycle, a deregulation of DNA replication, a loss of plasma membrane integrity, a subsequent permeabilisation of the nuclear envelope, an increase of cytosolic calcium correlated with calcium depletion in the culture medium, an increase of callose deposition and the loss of microtubule and actin integrity. We discuss these findings in the context of a working model, where kinetin, mediated by calcium, causes the breakdown of the cytoskeleton, which, either by release of executing proteins or by mitotic catastrophe, will result in PCD
Selective Differential Privacy for Language Modeling
With the increasing applications of language models, it has become crucial to
protect these models from leaking private information. Previous work has
attempted to tackle this challenge by training RNN-based language models with
differential privacy guarantees. However, applying classical differential
privacy to language models leads to poor model performance as the underlying
privacy notion is over-pessimistic and provides undifferentiated protection for
all tokens in the data. Given that the private information in natural language
is sparse (for example, the bulk of an email might not carry personally
identifiable information), we propose a new privacy notion, selective
differential privacy, to provide rigorous privacy guarantees on the sensitive
portion of the data to improve model utility. To realize such a new notion, we
develop a corresponding privacy mechanism, Selective-DPSGD, for RNN-based
language models. Besides language modeling, we also apply the method to a more
concrete application--dialog systems. Experiments on both language modeling and
dialog system building show that the proposed privacy-preserving mechanism
achieves better utilities while remaining safe under various privacy attacks
compared to the baselines. The data and code are released at
https://github.com/wyshi/lm_privacy to facilitate future research .Comment: NAACL 202
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