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# zbMATH — the first resource for mathematics
A 3D conservative sharp interface method for simulation of compressible two-phase flows. (English) Zbl 1453.76111
Summary: A three-dimensional (3D) conservative sharp interface (CSI) method, which combines 3D cut-cell methods and finite volume methods in the arbitrary Lagr... | {} |
# The Elastic Net¶
## Suggested Prerequisites¶
### Notes:¶
• Compromise between Ridge Regression and the Lasso
• Helps to reduce overfitting by bringing model coefficients towards zero and selectively to zero
• Arguably the most robust linear regularized method
### Loss Function and Optimization Problem¶
The ass... | {} |
# System Macros/Fundamentals
### The ConTeXt version
\contextversion contains the ConTeXt version string. If you need to make sure you are running under ConTeXt, check for this macro. It is not defined in syst-gen.tex but in context.tex. This is because syst-gen.tex is sometimes loaded under Latex.
The expansion of ... | {} |
The Rayleigh-Plesset Equation for Sonoluminescence
1. Oct 10, 2012
Ashiataka
I'm investigating the phenomenon of sonoluminescence. A quick search has yielded the Rayleigh-Plesset equation as being of use.
$$\frac{P_B(t)-P_\infty(t)}{\rho_L}=R\frac{d^2R}{dt^2}+\frac{3}{2}\left( \frac{dR}{dt}\right)^2+\frac{4\nu_L}{R}... | {} |
# NEET Chemistry The p-Block Elements (XII) Questions Solved
BOARD
(a) Explain the following :
(i)$N{F}_{3}$ is an exothermic compound whereas $NC{l}_{3}$ is not.
(ii) ${F}_{2}$ is most reactive of all the four common halogens.
(b) Complete the following chemical equations :
(i) $C+{H}_{2}S{O}_{4}\left(conc\right... | {} |
# Indicator function expression for two sample test
I am trying to understand the theory of this paper. Basically, the paper tries to lay down a framework for using two sample tests using binary classifiers. Let there be two samples $$S_p$$~$$P^n$$ and $$S_Q$$~$$Q^m$$ So they construct a dataset by pairing the $$n$$ s... | {} |
# Rectangle Inside An Ellipse
1. Mar 12, 2010
### Hart
1. The problem statement, all variables and given/known data
A rectangle is placed symmetrically inside an ellipse (i.e. with all four corners
touching the ellipse) which is defined by:
$$x^{2} + 4y^{2} = 1$$
Find the length of the longest perimeter possible ... | {} |
# Quantitative Estimate for the Lam\'e System with Rough Coefficients
## Speaker
Ching-Lung Lin, National Cheng Kung University
## Time
2018.01.31 14:00-15:00
## Venue
520 Pao Yue-Kong Library
## Abstract
In this talk we study the local behavior of a solution to the Lam'e system when the Lam'e coefficients $\la... | {} |
# Simulating a linear voltage regulator with ngspice
I am trying to simulate a simple linear regulator using gschem and ngspice. However, my output voltage varies by over a volt as my input voltage goes from 10V to 20V. Can I reduce this swing in the output voltage by changing circuit parameters or is this a character... | {} |
Difference Between Magnetic Field and Magnetic Flux
Main Difference –Magnetic Field vs. Magnetic Flux
Magnetic field and magnetic flux both refer to properties of magnets. The main difference between magnetic field and magnetic flux is that magnetic field is a region where magnetic poles and moving charges experience... | {} |
# Studies of Euler diagrams/decompose
## Shape of the Euler diagram
the four cells of bundle AB (outside of sets C and D) the two cells of bundle C (inside of set B, outside of A and D) the two cells of bundle D (outside of sets A, B and C) disjunction of the three conjunctions above
These images represent th... | {} |
Genetic variability of the length of postpartum anoestrus in Charolais cows and its relationship with age at puberty
Abstract : Fertility records ($n = 1 802$) were collected from 615 Charolais primiparous and multiparous cows managed in an experimental herd over an 11-year period. The objectives of the study were to ... | {} |
# Search
## mechanics of a point mass
### 1. Series 35. Year - 1. cars
Two cars start to move from the same point at the same time with velocities $v_1 = 100 \mathrm{km\cdot h^{-1}}$ and $v_2 = 60 \mathrm{km\cdot h^{-1}}$. Is it possible for the cars to move away from each other at any of the following velocities? I... | {} |
# Hessian at a non-stationary point
I have a function $G(Q) : \mathbb{R}^n \rightarrow \mathbb{R}$ that is known to be convex. I also know that $Q^*$ is a minimum of $G(D)$. If I apply Taylor's theorem to $G(Q)$ at $Q^*$, I get:
$$G(Q) = G(Q^*) + \nabla G(Q^*) (Q - Q^*) + \frac{1}{2} (Q - Q^*)^T \nabla^2 G(\hat{Q}) (... | {} |
Update all PDFs
# Toilet Roll
Alignments to Content Standards: G-MG.A.1
Picture a roll of toilet paper; assume that the paper in the roll is very tightly rolled. Assuming that the paper in the roll is very thin, find a relationship between the thickness of the paper, the inner and outer radii of the roll, and the le... | {} |
Decimals and Fractions
@ : Home > Quantitative Aptitude > Decimals and Fractions > Important Formulas
Types of Fractions:
1) Proper Fractions: A fraction whose numerator is less than the denominator is known as a proper fraction. Example: 4/5
2) Improper Fractions: A fraction whose numerator is greater than the den... | {} |
## Arab Journal of Mathematical Sciences
### Official Journal of The Saudi Association of Mathematical Sciences
Short Title: Arab J. Math. Sci. Publisher: Emerald, Bingley; King Saud University, Department of Mathematics, Riyadh ISSN: 1319-5166; 2588-9214/e Online: https://www.emerald.com/insight/publication/issn/13... | {} |
# How to separate the band structure of different materials in heterostructures using Quantum ESPRESSO?
So, I know that to calculate surface band structure of a material, you have to take its 2D system eg. single or few-layered. But, how to find the surface band structure in the case of heterostructures. This paper do... | {} |
# How do I simulate a constant velocity flow in porous media
I am modelling gas combustion in porous media. Most contemporary models assume that the pressure drop from the porous media is small enough to disregard, but I want to include that in my investigation. Most studies alos assume that the gas is filtered throug... | {} |
# Integer version of c++ standard library midpoint
I was extremely annoyed by the lengthy, edge-case-galore explanation of integer version of C++ standard library mindpoint implementation here, so I made my own simple 2's complement version. I present it for your judgement.
The general idea is to carry out a + (b-a)/... | {} |
# system
(PHP 4, PHP 5, PHP 7, PHP 8)
systemExecute an external program and display the output
### Description
system(string $command, int &$result_code = null): string|false
system() is just like the C version of the function in that it executes the given command and outputs the result.
The system() call also tr... | {} |
## Monochromatic triangles in every two-coloring of the plane?
An old problem (possibly due to Erdős and Graham?): given a triangle $T$ and a two-coloring of the plane, does there necessary exist a monochromatic congruent copy of $T$? Here "monochromatic" means that all three vertices receive the same color. It is kno... | {} |
# Abstract Confusions
Complexity is not a cause of confusion. It is a result of it.
## Small life
You come across all kind of quotes very often. Most of them will be quotes, interesting, strange and if not bizarre. I came across one such quote. I don’t know whether you can call it as a quote. It is an equation.
“Sm... | {} |
# Mean-Variance Optimization in Practice: Subset Resampling-based Efficient Portfolios
In a previous post, I introduced near efficient portfolios, which are portfolios equivalent to mean-variance efficient portfolios in terms of risk-return but more diversified in terms of asset weights.
Such near efficient portfolio... | {} |
# Problem Study : Geometric Vector
The diagram shows triangle $\displaystyle OAB$ in which $\displaystyle \overrightarrow{{OA}}=\vec{a}$ and $\displaystyle \overrightarrow{{OB}}=\vec{b}$. The point $\displaystyle C$ is the midpoint of $\displaystyle OA$ and the point $\displaystyle D$ is the midpoint of $\displaystyle... | {} |
시간 제한메모리 제한제출정답맞힌 사람정답 비율
20 초 (추가 시간 없음) 1024 MB411100.000%
## 문제
Barbara goes to Alan's banana farm, where the $N$ banana trees are organized in one long line represented by an array $B$. The tree at position $i$ has $B_i$ banana bunches. Each tree has the same cost. Once Barbara buys a tree, she gets all the banan... | {} |
## Eliza earns $400 per week plus$15 for each new customer she signs up.Let c represent the number of new customers Eliza signs up.
Question
Eliza earns $400 per week plus$15 for each new customer she signs up.Let c represent the number of new customers Eliza signs up.
Is she signs up 10 people then how much will sh... | {} |
Thread: Trig and Calculus:
1. Trig and Calculus:
The textbook I used didn't provide a detailed enough explanation.
How should I approach this problem?
Thank you in advance!
2. Re: Trig and Calculus:
let $\arctan2(x,y)$ be the quadrant adjusted arc tangent of point $(x,y)$
$\theta = \arctan2(x,400)$
$\beta = \arc... | {} |
# CF864A Fair Game
• 288通过
• 708提交
• 题目来源
• 评测方式 RemoteJudge
• 标签 排序 模拟
• 难度 入门难度
• 时空限制 1000ms / 256MB
• 提示：收藏到任务计划后，可在首页查看。
## 题意翻译
CF864A Fair Game
题意: Petya和Vasya决定玩一个游戏,他们有偶数张卡片,每张卡片上一个数字.每人选择一个数字(两个人选择的数字不能相同),选择了该数字就意味着需要把写有这个数字的所有卡片都拿走.Petya和Vasya认为,这个游戏是公平的,当仅当两个人可以拿走全部的卡片并且两人拿走的卡片数相同,否则这个游戏就是不公平的.
读入: 第一... | {} |
# Bourbaki General Topology I: Exercise 20, sec. 8 ch.1
I have added a picture with the complete exercise. I'm interested only in c), I think I have proved a) and b).
In c) we are given a topological space $$X_0$$ which is semi-regular (i.e. there exists a base for the topology whose open set satisfy the relation $$\... | {} |
Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles an... | {} |
# zbMATH — the first resource for mathematics
On optimal high-order in time approximations for the Korteweg-de Vries equation. (English) Zbl 0725.65107
This paper discusses the computation of periodic solutions to the Korteweg-de Vries equation $$u_ t+uu_ x+\epsilon u_{xxx}=0,$$ $$x\in (0,1)$$, $$t\in (0,\infty)$$ wit... | {} |
# modules of finite type over a principal ideal domain
The modules of finite type over a principal ring(which, in this post, is considered the same as a principal ideal domain, just for simplify the long name) behaves very well, much like the vector spaces over a field. For example, we know that in linear algebra, any... | {} |
# How "closely" must a slip be linked to the index?
In "How to Take Smart Notes", Ahrens states that before you add a slip to your slipbox, you should:
"Make sure it can be found from the index; add an entry in the index if necessary or refer to it from a note that is connected to the index." (p. 104)
Originally, I ... | {} |
# zbMATH — the first resource for mathematics
Holomorphic plumbing coordinates. (English) Zbl 1264.30031
Jiang, Yunping (ed.) et al., Quasiconformal mappings, Riemann surfaces, and Teichmüller spaces. AMS special session in honor of Clifford J. Earle, Syracuse, NY, USA, October 2–3, 2010. Providence, RI: American Math... | {} |
# Chern-Simons theory
+ 9 like - 0 dislike
13 views
In Witten's paper on QFT and the Jones poly, he quantizes the Chern-Simons Lagrangian on $\Sigma\times \mathbb{R}^1$ for two case: (1) $\Sigma$ has no marked points (i.e., no Wilson loops) and (2) $\Sigma$ has marked points and each point has attached a representati... | {} |
# Economy This Week (29th July to 4th August 2019)
Economy is one of the important areas of questioning in UPSC prelims and mains, series of ‘Economy This Week’ has been initiated to address the need to read and analyse economic articles in various business-related newspapers. The round-up of the Economy/Business sect... | {} |
We can take care of all of your company's cable and networking requirements. GM Cable Contractors GM Cable Contractors, Inc. provides our customers with LAN/WAN design, engineering and installation; CCTV/Video surveillance; voice, data and video networks; directional boring; outside plant design and construction; fiber... | {} |
An example of a noetherian ring in which the integral closure of a finite extension of its field of fractions is not noetherian
Similar to another question I posted. Does anyone know of an example of a noetherian ring in which the integral closure of a finite extension of it's field of fractions is not noetherian.
• ... | {} |
# Proving null quantification
I was reading this question and one of the answers talked about Null Quantification, particularly it said that if $\varphi$ is a wff that does not contain $x$ as a free variable then:
$\forall x \varphi \Leftrightarrow \varphi$
I know that this seems trivial, but is there a way to prove... | {} |
What is the formula for the slope of a secant line?
Sep 28, 2014
The formula for the slope of the secant line can be found using this different forms of the same definition.
$\frac{\Delta y}{\Delta x} = \frac{{y}_{2} - {y}_{1}}{{x}_{2} - {x}_{1}} = \frac{f \left(x + \Delta x\right) - f \left(x\right)}{\Delta x} = \f... | {} |
3 years ago
Quadrupolar Asymmetry (QA), which has been a rampant problem for rod-type Radio Frequency Quadrupole (RFQ) Linacs, arises due to the geometry of resonant structure. A systematic parametric simulation study has been performed to unravel their effect on Figure of Merit (FoM) quantities namely Quality Factor ... | {} |
# Getting started¶
## Installation¶
pytrnsys is best installed as part of its graphical user interface (see also below). For a standalone installation of the pytrnsys python package, please follow the installation guide on GitHub.
## Graphical user interface¶
pytrnsys can be combined with a graphical user interface... | {} |
×
Get Full Access to Atkins' Physical Chemistry - 11 Edition - Chapter 10c - Problem P10c.7
Get Full Access to Atkins' Physical Chemistry - 11 Edition - Chapter 10c - Problem P10c.7
×
ISBN: 9780198769866 2042
## Solution for problem P10C.7 Chapter 10C
Atkins' Physical Chemistry | 11th Edition
• Textbook Solutions
... | {} |
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
sum 在 史学理论 分类中 的翻译结果: 查询用时：0.057秒
历史查询
sum 和(0)总和(0)求和(0)
和
In sum, the dispute of the hypothesis of ‘the general crisis of the seventeenth century’ by the groves of western Academe had scored great successes. However, there are still a lot of questions that is worth studying. 综上所述,... | {} |
If a country wants to decrease its national debt as quickly as possible, what kind of budget will it most likely create? A. One that decreases taxes and decreases spending B. One that decreases taxes and increases spending C. One that increases taxes and decreases spending D. One that increases taxes and increases spen... | {} |
## All functions
add_pointer_struct
Adds Pointer Structure to R objects for use in Pomp
aggregate_model_internal
An Internal Function to Aggregate Model Output Using other Idmodelr functions.
aggregate_model
A Function to Apply Multiple Aggregations to Model Output
balance_polymod
Function to Balance a POLYMOD ... | {} |
# Throwing a ball
1. Sep 28, 2008
### chanv1
1. The problem statement, all variables and given/known data
By throwing a ball at an angle of 35°, a girl can throw it a maximum horizontal distance of R = 42 m on a level field. How far can she throw the same ball vertically upward? Assume that her muscles give the bal... | {} |
# Explanation of O(n2^n) time complexity for powerset generation
I'm working on a problem to generate all powersets of a given set. The algorithm itself is relatively straightforward:
def power_sets(A):
"""Returns the power set of A as a list of lists"""
if len(A) == 0:
return [[]]
else:
ps_n1 = power_sets(A[:-1]) ... | {} |
# 32nd M. Smoluchowski Symposium on Statistical Physics
Sep 18 – 21, 2019
Kraków
Europe/Warsaw timezone
## Random sequential adsorption kinetics for several two-dimensional shapes placed on a one-dimensional line
Not scheduled
15m
Kraków
Poster
### Speaker
Kozubek Konrad (M. Smoluchowski Institute of Physics, Jag... | {} |
# Derivative of 0.2^(3x)
## Derivative of 0.2^(3x). Simple step by step solution, to learn. Simple, and easy to understand, so dont hesitate to use it as a solution of your homework.
If it's not what You are looking for type in the derivative calculator your own function and let us solve it.
## Derivative of 0.2^(3x... | {} |
# Verbatim in plain-format with XeTeX
(I'm aware there has been a similar question before, but this one has a twist)
I wanted a verbatim macro to use which would use an unlikely character as an end-of-verbatim -marker (unlikely as in it would be unlikely to be included in the text that would become verbatim), and loo... | {} |
# Query on magnification by concave mirror [duplicate]
How does a concave mirror give images of same linear magnification for two different object distance?
I assume that you mean $|m|$ can be the same for two images generated by a concave mirror.
In that case, the object can be placed in two places, one which is ou... | {} |
# Contents
## Definition
A field (in the sense of commutative algebra) $F$ is perfect if every algebraic extension of $F$ is separable. In that case, every splitting field extension of $F$ is a Galois extension.
An extension $E/F$ is separable iff every element $\alpha \in E$ is separable, meaning that its irreducib... | {} |
dc.contributor.author Buza, G dc.contributor.author Page, J dc.contributor.author Kerswell, Richard dc.date.accessioned 2022-03-10T00:30:06Z dc.date.available 2022-03-10T00:30:06Z dc.date.issued 2022-04-08 dc.identifier.issn 0022-1120 dc.identifier.uri https://www.repository.cam.ac.uk/handle/1810/334822 dc.description.... | {} |
# Evaluate summation
1. Apr 25, 2010
### annoymage
1. The problem statement, all variables and given/known data
evaluate
$$\sum$$$$\frac{1}{e^n}$$ from 0 -> infinity
2. Relevant equations
N/A
3. The attempt at a solution
from what i've learn, i can calculate summation i in form
$$\sum$$na ,a is integer
or
$$\s... | {} |
Wednesday, July 24, 2019
High School Math Solutions - Series Convergence Calculator, p-Series Test
Last blog post, we discussed what an infinite series is and how to determine if an infinite series converges using the geometric series test. In this blog post, we will discuss how to determine if an infinite series con... | {} |
Public Group
# Convert 1D array to 2D array C#
This topic is 2246 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.
## Recommended Posts
Hello everyone.
I have the following file that looks like this:-
1,2,3,4,5,6,7,8,9, 10,11,12,13,14,15, 16,17,18,19,20,21,
no... | {} |
Lines on Mapbox in R
How to draw a line on Map in R with plotly.
New to Plotly?
Plotly is a free and open-source graphing library for R. We recommend you read our Getting Started guide for the latest installation or upgrade instructions, then move on to our Plotly Fundamentals tutorials or dive straight in to some B... | {} |
Limited access
Let $R$ be a commutative ring with identity $1_R$.
An $R$-algebra $\mathcal{A}$ is a ring $(\mathcal{A}, +, \cdot)$ which is an $R$-module, such that $r(a\cdot a')=(ra)\cdot a'=a\cdot (ra')$ and $1_Ra=a$ , for all $r\in R$ and $a,a'\in \mathcal{A}$. Here $(r,a)\mapsto ra$ is the $R$-module action, and ... | {} |
This appendix has information about using various text editors efficiently with MathBook XML source. The choice of an editor that suits you is a big part of being a productive author. Despite not being open source, we are partial to Sublime Text, due to its unlimited trial period, reasonable licensing (cost and terms),... | {} |
# Help in choosing LaTeX2e books in light of LaTeX3 development
I'm quite new to LaTeX (~3 months) and I'm excited about buying the books. I just bought The TeXbook on eBay and hopefully it should arrive next week. I might even want to get a printed copy of TeX by Topic since I'm not a big fan of reading on-screen. Ne... | {} |
# All Questions
12,287 questions
0answers
6 views
### What's the difference between demand elasticity and demand volatility?
What's the difference between demand elasticity and demand volatility? Demand elasticity: https://www.investopedia.com/terms/d/demand-elasticity.asp Demand volatility: https://www.sdcexec.com/... | {} |
<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
5.1: Fractions, Decimals and Percents
Difficulty Level: At Grade Created by: CK-12
Introduction
Fabulous Football
The local high school’s football season has just ended. At lunch, Car... | {} |
## Fibonacci Numbers
The Fibonacci Numbers have been of great interest since they were first seen as a solution to an algebra word problem published in 1202. The Fibonacci Numbers have many interesting properties which have many applications. For this the focus will be on finding a formula to find the nth Fibonacci nu... | {} |
# Chapter 1 Introduction
Welcome to Tree phenology analysis with R!
My name is Eike Luedeling, and I lead the HortiBonn research group within the Institute of Crop Science and Resource Conservation (INRES) at the University of Bonn.
In this course/module/book, I will provide an overview of methods we can use to stud... | {} |
# What classifier can recognize differences in two text strings immediately?
I'm playing around with the TextBlob library for python. It has in it a NaiveBayesClassifier as well as a DecisionTreeClassifier. However, they do not work for my purposes. I need to be able to look at differences between strings, preferably ... | {} |
• ### Spectral energy distribution and radio halo of NGC 253 at low radio frequencies(1702.02434)
Feb. 19, 2017 astro-ph.GA
We present new radio continuum observations of NGC253 from the Murchison Widefield Array at frequencies between 76 and 227 MHz. We model the broadband radio spectral energy distribution for the t... | {} |
# How to evaluate the quality of probability estimation?
I have a classifier that gives its decisions as probability estimations: for each datum it returns a set of probabilities $p_j$ for each known class $j$: $p_j(\vec{x})=P(c_{real}=j|\vec{x})$.
I have a training dataset, on which I trained the classifier, and I h... | {} |
Acta Chimica Sinica ›› 2020, Vol. 78 ›› Issue (5): 419-426.
Special Issue: 分子探针与纳米生物学
Article
### 基于模拟酶-天然酶级联反应的双模式传感平台用于生物标志物的超灵敏检测
1. 武汉大学化学与分子科学学院 武汉 430072
• 投稿日期:2020-03-19 发布日期:2020-05-06
• 通讯作者: 刘晓庆 E-mail:xiaoqingliu@whu.edu.cn
• 基金资助:
项目受国家自然科学基金（No.81602610）和中央高校基本科研基金（No.2042018kf1006）资助.
### Dual-Mode ... | {} |
There’s a problem that a coworker recently brought up. The problem statement can be found here.
This is a re-hash of an existing problem known as the one hundred prisoners problem. It seems impossible at first, and many naive approaches yield failing results. But, given the correct approach, it is solvable with a surp... | {} |
ForK Library
# krigingmaxeipredictGEK.f90 File Reference
Subroutine to Predict maximum expected improvement from Gradient-Enhanced Kriging Surface based on a current minimum value(requires buildkrigingGEK to be called first)
Only Works for Ordinary Kriging (Constant Mean function) More...
Go to the source code of th... | {} |
# Truth tables
### Truth tables
#### Lessons
Notes:
We can organize truth values of statements by using a truth table.
• Introduction
Truth Tables Overview:
a)
Negation Truth Tables
b)
Conjunction Truth Tables
c)
Disjunction Truth Tables
d)
Truth Tables with three or more statements
• 1.
Truth Tables with Negat... | {} |
# Why is the divergence of the field zero in Maxwell's equations?
I read in a book called Vector Analysis by Murray R. Spiegel by Schaums Series, and I found that there is somewhere printed that the divergence of the electric field is zero.
Since my teacher told that divergence means something which originates from a... | {} |
## 89.27 Remarks regarding minimality
The main theorem of this chapter is Theorem 89.26.4 above. It describes completely those categories cofibred in groupoids over $\mathcal{C}_\Lambda$ which have a presentation by a smooth prorepresentable groupoid in functors. In this section we briefly discuss how the minimality d... | {} |
# What's an intuitive way to think about the determinant?
In my linear algebra class, we just talked about determinants. So far I’ve been understanding the material okay, but now I’m very confused. I get that when the determinant is zero, the matrix doesn’t have an inverse. I can find the determinant of a $2\times 2$ ... | {} |
### Partial Differential Equations - M1 - 8EC
[Fall 2020]
Prerequisites
A basic knowledge of real and complex analysis and/or calculus. A background in ordinary differential equations and/or dynamical systems. Several concepts from functional analysis will be used, but they will introduced and discussed according to... | {} |
GMAT Question of the Day - Daily to your Mailbox; hard ones only
It is currently 13 Nov 2018, 10:15
### GMAT Club Daily Prep
#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customize... | {} |
# Is adjusted R squared score still appropriate when number of regressors is larger than the sample size?
So I have a really small sample size of 50, and I have 80 regressors. The $R^2$ score is about 0.1, and according to the following equation on Wikipedia about how to compute adjusted $\bar{R}^2$,
$$\bar{R}^2 = R^... | {} |
# Change invoice counter to two places
Hey there,
are there any (technical) reasons, why the invoice counter MUST have 4 digits? So far, I created my invoices by this scheme: YYMMXX, like 200804 (the 4th invoice in august 2020). In this way, I can create 99 invoices per month, which is more than enough, since I have ... | {} |
# Our 'second brain'" modelling its development and disease
#### by Prof Kerry Landman
Institution: Department of Mathematics and Statistics, The University of Melbourne
Date: Wed 29th June 2011
Time: 11:00 AM
Location: Room 213, Richard Berry Building, The University of Melbourne
Abstract: The enteric nervous syste... | {} |
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Numerical modelling of ENAs from ... | {} |
• ### Transverse-energy distributions at midrapidity in $p$$+$$p$, $d$$+Au, and Au+Au collisions at \sqrt{s_{_{NN}}}=62.4--200~GeV and implications for particle-production models(1312.6676) Dec. 23, 2013 nucl-ex Measurements of the midrapidity transverse energy distribution, d\Et/d\eta, are presented for p$$+$$p, d$$+$... | {} |
Find the LCD y^2-25 , y^2-10y+25
,
Factor .
Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Factor using the perfect square rule.
Rewrite as .
Check the middle term by multiplying and compare this result with the middle term in the original expression.
Sim... | {} |
So as mentioned the Krapcho-Decarboxylation follows a SN2-mechanism and is therefore working best with a methylester. Thiamin (Vitamin B 1) is the reagent used in living systems to catalyze decarboxylation reaction. 5:15. The Barton decarboxylation (15) and the Barton modification of the Borodin-Hunsdiecker reaction (1... | {} |
# Winner concentration
Winner concentration is one of the indicators used to calculate the zIndex score for evaluating contracting authorities.
The winner concentration indicator measures whether a single bidder, or a very limited group of bidders, is awarded a significant portion of the authority's contracts.
Best ... | {} |
Home How to check whether a file exists?
# How to check whether a file exists?
spence91
1#
spence91 Published in 2008-09-17 12:55:00Z
How to see if a file exists or not, without using the try statement?
abc
2#
import os.path if os.path.isfile(filepath):
abc
3#
import os os.path.exists(path) # returns whether the p... | {} |
Lemma 93.15.4. Let $S$ be a scheme contained in $\mathit{Sch}_{fppf}$. Let $\mathcal{X} \to \mathcal{Y}$ be a morphism of stacks in groupoids over $(\mathit{Sch}/S)_{fppf}$. Assume that
1. $\mathcal{X} \to \mathcal{Y}$ is representable by algebraic spaces, and
2. $\mathcal{Y}$ is an algebraic stack over $S$.
Then $\... | {} |
• G R SRIDHARA
Articles written in Pramana – Journal of Physics
• Systematic study of the $\alpha$ decay properties of actinides
This work analyses the $\alpha$ decay properties of actinides. Geiger–Nuttall plots are presented for actinides. We have studied the competition between $\alpha$ decay and spontaneous fiss... | {} |
# Boundary value problems for heat equation with certain potentials in Lipschitz cylinders
Authors
Type
Published Article
Journal
Forum Mathematicum
Publisher
De Gruyter
Publication Date
Nov 19, 2011
Volume
26
Issue
2
Pages
377–412
Identifiers
DOI: 10.1515/form.2011.164
Source
De Gruyter
Keywords
The Dirichlet and Neu... | {} |
# Ideals of the algebra of all bounded linear operators on $\ell_p \oplus \ell_q$
Let $\mathcal{L}(X)$ be the algebra of all bounded linear operators from $X$ to $X$ for Banach space $X$.
I need to show that $\mathcal{L}(\ell_p \oplus \ell_q)$ for $p \neq q$ contains at least two nontrivial closed two-sided ideals.
... | {} |
1996 monaco grand prix
The screen capture below shows the full screen for wood column design. Read on to learn how to apply the heat capacity formula correctly to obtain a valid result. In simplest term, it is the volume of a box - 1 ft long, 1 ft wide, and 1 ft … Assuming a 6ft length of 4x4 that actually measures 3.5... | {} |
0
0
Entering edit mode
8 days ago
Hello,
I am experiencing issues when downloading from SRA several data using the following command, and I do not understand how to manage it.......
# in ids_mod1.txt file there are 3 SRR ids and I am using WSL ubuntu.
\$ cat ids_mod1.txt | parallel fastq-dump --split-files {}
2021... | {} |
# Where does new space come from as the universe gets bigger?
Greetings,
How is new space created?
There was no space before the big bang, correct? And the universe is still getting bigger? So the amount of space is increasing.
Where did and does it come from? Space is something not nothing correct? It can be stret... | {} |
Blog Post
Fundamentals of Robotics: Wrenches
In the previous lesson, we learned that screws are geometric interpretations of twists, and they can be used to express configurations in robotics. This lesson is about spatial forces or wrenches in robotics. We will talk about wrenches in this lesson, which are 6-vector r... | {} |
# On stellated spheres and a tightness criterion for combinatorial manifolds
@article{Bagchi2014OnSS,
title={On stellated spheres and a tightness criterion for combinatorial manifolds},
journal={Eur. J. Comb.},
year={2014},
volume={36},
pages={294-313}
}
• Published 24 July 2012
• Mathematics
• Eur. J. Comb.
Separatio... | {} |
# A visual introduction to Morse theory
## Tags: howtos, research
In a previous article, I already introduced manifolds and their, ahem, manifold ways. Among the many interesting comments I received about this article, some were dealing with a basic question, namely how to measure the properties of a manifold. In thi... | {} |
# Heisenberg Uncertainty principle defined as $\Delta x \Delta p_x \geq h$ versus $\Delta x \Delta p_x \geq \hbar/2$ [duplicate]
At my university, in the during lectures and in the equation sheet for our exams, the formula for the Heisenberg Uncertainty Principle is stated as $\Delta x \Delta p_x \geq h$, for example ... | {} |
# Thread: help would be appreciated, thanks!
1. ## help would be appreciated, thanks!
as n takes each positive integer value in turn (that is n=1, n=2, n=4 and so on) how many different values are obtained for the remainder when n(squared) is divede by n+4?
a)1 b)8 c)9 d)16 e) infinitely many
help would be apprecia... | {} |
Tools
This site is devoted to mathematics and its applications. Created and run by Peter Saveliev.
Linear independence
Vectors are linearly independent if none of them is a linear combination of the rest.
For example, (1,0,1), (1,2,0), (0,1,-1), (3, 2 1/2, 1 1/2) are linearly dependent as the last vector is represe... | {} |
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