Editorial HFD, v. 11, n. 22, dez. 2022

$n$-cocoherent rings‎, ‎$n$-cosemihereditary rings and $n$-V-rings

 Let $R$ be a ring‎, ‎and let $n‎, ‎d$ be non-negative integers‎. ‎A right $R$-module $M$ is called $(n‎, ‎d)$-projective if $Ext^{d+1}_R(M‎, ‎A)=0$ for every $n$-copresented right $R$-module $A$‎. ‎$R$ is called right $n$-cocoherent if every $n$-copresented right $R$-module is $(n+1)$-coprese-nted‎, ‎it is called a right co-$(n,d)$-ring if every right $R$-module is $(n‎, ‎d)$-projective‎. ‎$R$...

What Will 2022 Look Like? The IEEE CS 2022 Report

Lecture 11 — March 22 , 2012

Before presenting any integer data structures, we present some models for computations with integers (both to precisely state what we are looking for, and as a framework to prove lower bounds). In each model, memory is arranged as a collection of words of some size (and potentially a small amount of working memory), and a fixed cost is charged for each operation. We also always make the fixed u...

Lecture 22 — Nov 11 , 2014

2.1 Regression Problem Statement Given A ∈ Rn×d and b ∈ Rn, Find x ∈ Rd minimizing ‖Ax− b‖2. (n d) A is given data composed of n rows of size d which indicates the d different features. And for those n items, vector b is composed of n outcomes corresponding to each 1× d feature vector. By finding solution x ∈ minimizing ‖Ax− b‖2, we can find an approximate linear mapping between A and b via x: ...

Sensors 2002, 2, 11-22

Macroporous silicon has been etched from n-type Si, using a vertical etching cell where no rear side contact on the silicon wafer is necessary. The resulting macropores have been characterised by means of Scanning Electron Microscopy (SEM). After etching, SiO2 was thermally grown on the top of the porous silicon as an insulating layer and Si3N4 was deposited by means of Low Pressure Chemical Va...