Printed Electronics (PE) feature distinct and remarkable characteristics that
make them a prominent technology for achieving true ubiquitous computing. This
is particularly relevant in application domains that require conformal and
ultra-low cost solutions, which have experienced limited penetration of
computing until now. Unlike silicon-based technologies, PE offer unparalleled
features such as non-recurring engineering costs, ultra-low manufacturing cost,
and on-demand fabrication of conformal, flexible, non-toxic, and stretchable
hardware. However, PE face certain limitations due to their large feature
sizes, that impede the realization of complex circuits, such as machine
learning classifiers. In this work, we address these limitations by leveraging
the principles of Approximate Computing and Bespoke (fully-customized) design.
We propose an automated framework for designing ultra-low power Multilayer
Perceptron (MLP) classifiers which employs, for the first time, a holistic
approach to approximate all functions of the MLP's neurons: multiplication,
accumulation, and activation. Through comprehensive evaluation across various
MLPs of varying size, our framework demonstrates the ability to enable
battery-powered operation of even the most intricate MLP architecture examined,
significantly surpassing the current state of the art.

本文提出了一种基于印刷电子技术的自动设计框架，通过引入近似计算和定制设计的原则，克服了印刷电子技术中复杂电路实现的限制，实现了超低功耗的多层感知器分类器，使得即使在最复杂的结构下，也能实现电池供电操作且显著超越目前的技术水平。

面向印刷多层感知机的乘积累加和激活的定制逼近

Bespoke Approximation of Multiplication-Accumulation and Activation  Targeting Printed Multilayer Perceptrons

We present and discuss several old and new methods for mapping a circular
disc to a square. In particular, we present analytical expressions for mapping
each point (u,v) inside the circular disc to a point (x,y) inside a square
region. Ideally, we want the mapping to be smooth and invertible. In addition,
we put emphasis on mappings with desirable properties. These include conformal,
equiareal, and radially-constrained mappings. Finally, we present applications
to logo design, panoramic photography, and hyperbolic art.

本文介绍了多种将圆形盘映射到正方形的方法，并着重讨论了保证映射平滑、可逆的方法，并介绍了包括保角、等面积和射线限制映射在内的几种有用的性质。最后，我们讨论了在商标设计、全景摄影和双曲艺术中的应用。