The document discusses series solutions for second order linear differential equations near ordinary and regular singular points.
It defines an ordinary point as a point where the functions p(x) and q(x) in the normalized form of the differential equation are analytic. Near an ordinary point, there exist two linearly independent power series solutions of the form Σcn(x-a)n that converge within the radii of convergence of p(x) and q(x).
It also discusses finding series solutions near a regular singular point x0=0, where the limits of p(x) and q(x) as x approaches 0 exist. An initial guess of a power series solution with exponent r is made, and the
Numerical Analysis and Its application to Boundary Value ProblemsGobinda Debnath
here is a presentation that I have presented on a webinar. in this presentation, I mainly focused on the application of numerical analysis to Boundary Value problems. I described one of the most useful traditional methods called the finite difference method. those who are interested to do research in applied mathematics, CFD, Numerical analysis may go through it for the basic ideas.
Series solution of ordinary differential equation
advance engineering mathematics
The power series method is the standard method for solving linear ODEs with variable
coefficients. It gives solutions in the form of power series. These series can be used for computing values, graphing curves, proving formulas, and exploring properties of
solutions, as we shall see.
This ppt covers the topic of B.Sc.1 Mathematics,unit - 5 , paper - 2, calculus- Introduction of Linear differential equation of second order , complete solution in terms of known integral belonging to the complementary function.
Numerical Analysis and Its application to Boundary Value ProblemsGobinda Debnath
here is a presentation that I have presented on a webinar. in this presentation, I mainly focused on the application of numerical analysis to Boundary Value problems. I described one of the most useful traditional methods called the finite difference method. those who are interested to do research in applied mathematics, CFD, Numerical analysis may go through it for the basic ideas.
Series solution of ordinary differential equation
advance engineering mathematics
The power series method is the standard method for solving linear ODEs with variable
coefficients. It gives solutions in the form of power series. These series can be used for computing values, graphing curves, proving formulas, and exploring properties of
solutions, as we shall see.
This ppt covers the topic of B.Sc.1 Mathematics,unit - 5 , paper - 2, calculus- Introduction of Linear differential equation of second order , complete solution in terms of known integral belonging to the complementary function.
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The presentation shows types of equations inside every topic along with its general form, generating formula, and other equations like recursion, frobenius, rodrigues etc for calculus. Its an overall explanation in a brief. You are at correct link to get your work done out of this in your engineering maths.
Analytic Function, C-R equation, Harmonic function, laplace equation, Construction of analytic function, Critical point, Invariant point , Bilinear Transformation
Power Series - Legendre Polynomial - Bessel's EquationArijitDhali
The presentation shows types of equations inside every topic along with its general form, generating formula, and other equations like recursion, frobenius, rodrigues etc for calculus. Its an overall explanation in a brief. You are at correct link to get your work done out of this in your engineering maths.
Analytic Function, C-R equation, Harmonic function, laplace equation, Construction of analytic function, Critical point, Invariant point , Bilinear Transformation
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Series solutions at ordinary point and regular singular point
1. Series Solutions at Ordinary
point and Regular Singular
point
ADVANCED ENGINEERING MATHEMATICS
2. Series Solutions at Ordinary Point
• We are considering methods of solving second order linear equations when the
coefficients are functions of the independent variable. We consider the second order
linear homogeneous equation
P(x)
𝑑2 𝑦
𝑑𝑥2 + Q(x)
𝑑𝑦
𝑑𝑥
+ R(x)y = 0 (1)
• since the procedure for the non-homogeneous equation is similar. Many problems in
mathematical physics lead to equations of this form having polynomial coefficients;
examples include the Bessel equation
𝑥2y’’ + xy’ + (𝑥2 – 𝑎2) y = 0
• where a is a constant, and the Legendre equation
(1 – 𝑥2) y’’ – 2xy’ + c(c + 1) y = 0
• where c is a constant.
3. • For this reason, as well as to simplify the algebraic computations, we primarily
consider the case in which P, Q, and R are polynomials. However, we will see that
the method can be applied when P, Q, and R are analytic functions. For the time
being, we assume P, Q, and R are polynomials and they do not have common
factors. Suppose that we wish to solve equation (1) in a neighborhood of a point a.
The solution of equation (1) in an interval containing point a is closely related
with the behavior of P(x) in the interval.
• Definition: Given the equation
P(x)
𝑑2 𝑦
𝑑𝑥2 + Q(x)
𝑑𝑦
𝑑𝑥
+ R(x)y = 0
the equation
𝑑2 𝑦
𝑑𝑥2 +
Q(x)
P(x)
𝑑𝑦
𝑑𝑥
+
R(x)
P(x)
y = 0 or
𝑑2 𝑦
𝑑𝑥2 + p(x)
𝑑𝑦
𝑑𝑥
+ q(x) y = 0
where p(x) =
Q(x)
P(x)
and q(x) =
R(x)
P(x)
is called the equivalent normalized form of equation(1)
4. • Definition:
The point a is called an ordinary point of equation (1) if both of the functions p(x) and
q(x) in the equivalent normalized form, are analytic functions at the point a.
If either or both of these functions are not analytic at a, then the point a is a singular
point of equation (1).
• Theorem:
If a is an ordinary point of the differential equation (1), then p(x) = Q(x)/P(x) and q(x)
= R(x)/P(x) are analytic at a, and there are two nontrivial linearly independent power
series solutions of equation (1) of the form
𝑛=0
∞
𝑐 𝑛(𝑥 − 𝑎) 𝑛, 𝑛=0
∞
𝑑 𝑛(𝑥 − 𝑎) 𝑛
Furthermore, the radius of convergence for each of the series solutions is at least as
large as the minimum of the radii of convergence of the series for p(x) and q(x).
5. The Method of Solution
• We assume that a is an ordinary point of the equation (1), so it has a series solution
near a of the form 𝑛=0
∞
𝑐 𝑛(𝑥 − 𝑎) 𝑛 that converges for |x –a| < ρ .
• We want to determine the coefficients c0, c1, c2, … in the series solution. Let’s
differentiate the series termwise twice.
• y(x) = 𝑛=0
∞
𝑐 𝑛(𝑥 − 𝑎) 𝑛 = 𝑐0 + 𝑐1(x-a) + 𝑐2(x−a)2
+ ....
• y'(x) = 𝑛=0
∞
𝑐 𝑛 𝑛(𝑥 − 𝑎) 𝑛−1 = 𝑐1 + 2𝑐2(x-a) + 3𝑐3(x−a)2
+ ....
• y‘’(x) = 𝑛=0
∞
𝑐 𝑛 𝑛(𝑛 − 1)(𝑥 − 𝑎) 𝑛−2 = 2𝑐2 + 6𝑐3(x-a) + 12𝑐4(x−a)2
+ ....
Substituting in the differential equation (1), we get
𝐾0 + 𝐾1(x-a) + 𝐾2(x−a)2
+ .... + 𝐾 𝑛(x−a) 𝑛
+ .... = 0 (4)
where 𝐾 𝑛 is function of certain coefficients 𝑐𝑖. In order that series (4) be valid for all
x in some interval |x – a| < ρ, we must have
𝐾0= 𝐾1= ... = 𝐾 𝑛 = ... = 0
6. Translated Series Solutions
• If we look for a solution of the equation P(x)
𝑑2 𝑦
𝑑𝑥2 + Q(x)
𝑑𝑦
𝑑𝑥
+ R(x)y = 0 of the form
y = 𝑛=0
∞
𝑐 𝑛(𝑥 − 𝑎) 𝑛
, we can make a change of variable x – a = t, obtaining a new
differential equation for y as a function of t, and then look for solutions of this new
equation of the form y(t) = 𝑛=0
∞
𝑐 𝑛 𝑡 𝑛
. When we have finished the calculations, we
replace t by x –a
7. Series Solutions Near a Regular Singular Point
We will now consider solving the equation
P(x)
𝑑2 𝑦
𝑑𝑥2 + Q(x)
𝑑𝑦
𝑑𝑥
+ R(x)y = 0
Where 𝑥0= 0 is a regular singular point. This means that the limits
𝑝0 = lim
𝑥→0
𝑥
Q(x)
P(x)
……(1) and 𝑞0 = lim
𝑥→0
𝑥2 R(x)
P(x)
……(2)
• exist. Sometimes, it is convenient to rewrite this in the form (by dividing by P(x)
and multiplying by 𝑥2):
𝑥2 𝑑2 𝑦
𝑑𝑥2 + x[xp(x)]
𝑑𝑦
𝑑𝑥
+ [𝑥2
q(x)]y = 0 ……(3)
Our initial guess for a solution to this equation is
8. • y(x) = 𝑛=0
∞
𝑎 𝑛 𝑥 𝑛+𝑟
• Where 𝑎0 ≠ 0 After taking derivatives and plugging y’ and y’’ into equation (3),
we can find the indicial equation F(r)=0 by looking at the coeffcient of 𝑥 𝑟, which
is equal to 𝑎0 𝐹 𝑟 .The indicial equation can also be found directly from the
equation:
𝐹 𝑟 = r(r-1)+ 𝑝0 𝑟 + 𝑝0 = 0
• Where 𝑝0 And 𝑞0 are the limits in equations (1) and (2). The roots of
𝐹 𝑟 , denoted by 𝑟1and 𝑟2, are called the exponents at the singularity.
Suppose 𝑟1 ≥ 𝑟2 and are real. Then in the interval 0< 𝑥 < p ,where p is the
minimum of the radii of convergence, there is a solution of the form:
𝑦1(x) = 𝑥 𝑟1 1 + 𝑛=0
∞
𝑎 𝑛(𝑟1)𝑥 𝑛
• Where 𝑎 𝑛(𝑟1) is obtained from the recurrence relation one gets from
looking at the coefficient of 𝑥 𝑛+𝑟 and plugging in r = r1 And 𝑎0 = 1