物理与天文2019nature.com
拒绝将忆阻器视为基本电路元件的理由(2018)
The case for rejecting the memristor as a fundamental circuit element (2018)
进阶 · 约 40 分钟读完前置知识:电路理论、微积分、忆阻器基础
导读
这篇 2018 年发表于 Scientific Reports 的论文重新审视了「忆阻器是第四种基本无源电路元件」这一说法:作者从电荷–电压关系的第一性原理出发重新推导基本无源元件的分类,认为 Strukov 等人提出的「缺失的第四元件」并不成立——它只是把看待电阻的两种方式混为一谈,实际演示的忆阻器更应被理解为「电阻与有源迟滞的非线性组合」,因此不具备基本、不可再分的元件地位。
HN 关注点:的焦点是这场关于「忆阻器是否只是惠普炒作的伪概念」的争论,以及这篇条理清晰的论文从第一性原理拆解了广为流传的四元件表。
HN 评论精选
这几条评论里:支持 2 质疑 1
支持论文从第一性原理证明 Strukov 的四元件表本身有误,忆阻器不是不可再分的基本元件,但这不影响其工程价值。
这是一篇非常漂亮的学术「斩首」之作(褒义)。它意在彻底否定忆阻器作为基本无源电路元件的地位,而且做得很到位。简单说:从第一性原理重新推导无源元件的「周期表」后可以看出,忆阻器并不契合。Strukov 表格里那个「缺失的第四元件」其实并不是某一类缺失的无源元件;论文说明的是 Strukov 的表格本身有误——它只是标准 C/R/I 关系的一种呈现方式,并且把看待电阻的两种不同方式混为一谈。附带说明,这并不削弱忆阻器作为一种可能像晶体管一样改变行业的发明的潜力;但它否定了忆阻器「基本、不可再约的无源电路元件」这一地位。理由包括两点:基本元件都由电荷–电压关系(尤其是随时间的变化,类似经典物理中的位置/速度/加速度)彼此关联,而忆阻器在这一框架里没有独一无二的位置;基本元件不能由彼此组合而成,而迄今展示的忆阻器只是「电阻与有源迟滞的非线性组合」。
60654查看英文原文
Oh what a thoroughly impressive academic hatchet job, and I mean that in the kindest possible sense. It's intended to kill the idea of memristors as fundamental passive circuit elements, and it's very good at doing just that. TLDR: by re-deriving the periodic table of passive elements from first principles, it shows that memristors don't fit. The "missing fourth element" from Strukov's table is not really a missing type of a passive element. Rather, it shows that Strukov's table itself is wrong, that it's just a view of the standard C/R/I relationships that conflates two different ways of looking at resistance specifically (see especially https://www.nature.com/articles/s41598-018-29394-7/figures/3 ) FWIW this does not diminish memristors as potentially industry-changing inventions, like transistors. But it denies them the status of fundamental, irreducible passive circuit elements, specifically, partly by showing that while fundamental elements are all connected by charge-voltage relationships (specifically, changes over time, like position/velocity/acceleration are in classical physics), memristors don't have a unique spot there; and also because fundamental elements can't be composed from each other, while the memristors demonstrated so far are "nonlinear composition of resistors with active hysteresis".
质疑质疑论文是否只是用既有正统去否定新概念,双方可能都错。
抱歉,我不是电子工程师,所以我主要只能把整场忆阻器讨论当作几种互相竞争的说法来看。而「惠普推销的东西并不是最初设想的那个,甚至没人能确定它是否真的存在」这个说法确实很有说服力。但本文给人一种感觉:它在试图用正统理论去调和一种尚不清晰的新概念,这让我不太舒服。读起来有点像炼金术士否定燃素说——也许你们双方都错了?
jameshart查看英文原文
I'm not, I apologize, an electronic engineer, so I mainly only get to view the whole memristor discussion as one of competing narratives - and certainly the 'whatever HP are pitching, it's not what was originally envisaged, and there's no certainty that's even a thing' narrative is certainly compelling. But there is a slight feel in this paper of an attempt to reconcile an unclear new concept with an orthodoxy, and that rubs me the wrong way. It reads a little like an alchemist dismissing the concept of phlogiston. Maybe you're both wrong? "The basic question of the “missing element” is whether we can we have a new passive element that cannot be made from the combination of existing passive elements. Water (W), Fire (F), Earth (E) and Air (A) are the four fundamental passive elements that a contemporary alchemical engineer is familiar with.... "
支持欣赏这种第一性原理视角,正好用来反驳忆阻器炒作。
我很喜欢这篇对忆阻器的审视。从第一性原理切入的方式正合我意。我把它存进笔记,用来转发给那些喋喋不休地讲忆阻器多革命的人。
ChuckMcM查看英文原文
I enjoyed this look at the memristor. Coming at the question from first principles is one that works for me. I've saved it in my notebook for forward to folks who go on and on about how revolutionary they are.
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