com s introduction to differential equations

... videos is also available from the ebook publisher bookboon .com I welcome any comments, suggestions or corrections sent by email to jeffrey.chasnov@ust.hk Links to my website, these lecture notes, ... this license, visit http://creativecommons.org/licenses/by/3.0/hk/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA Preface What follows ... this equation has units of one over length squared times R and that E < for a bound state solution It is customary to nondimensionalize the length scale so that 2µE/¯h2 = −1/4 in dimensionless

Ngày tải lên: 11/06/2017, 15:07

... Programmer? ?s Introduction to C# explains how C# works, why it was designed the way it was, and how C# fits into Microsoft? ?s new NET Frameworks This book teaches programmers how to write C# components ... and how to use the basic runtime features (such as I/O) Gunnerson also devoted time to more advanced topics such as regular expressions and collections Final chapters include Making Friends with ... 20 Namespaces and Using - 20 Namespaces and Assemblies - 21 Basic Data Types - 22 Classes, Structs, and Interfaces - 23 -2- Statements

Ngày tải lên: 10/12/2013, 16:15

... the masses. In its more than seven versions, Visual Basic has continued to provide us with the features we need to create rich, powerful Windows applications and as our needs evolved, so too did ... Visual Basic for the past six years, it is similar Just as a standard COM DLL has a type library, the assembly has a manifest that contains the metadata for the assembly, such as... that ... developing custom applications and providing consultancy and training services based around Visual Basic, ASP, COM+ , and SQL Server. Adding to Craig? ?s industry experience, the Microsoft Visual Basic Program

Ngày tải lên: 10/12/2013, 16:15

... the string assigned to $sentence2 These differing outcomes are due to the usage of double and single quotation marks in assigning the corresponding strings to $sentence and $sentence2 Before discussing ... languages, a set of delimiters is used to represent special characters, such as the tab or newline characters Table 2-1 lists the supported delimiters: Table 2-1 Supported String Delimiters CHARACTER ... Expressions, Operators, and Control Structures Alternative Enclosure Bracketing Control structures are enclosed in a set of brackets to clearly signify the various statements making up the structure

Ngày tải lên: 09/08/2014, 12:22

... (discussed shortly) A class is a template from which specific instances of the class may be created and used in a program These instances are also known as objects One way to grasp the relationship ... from the user, allowing the user to focus on the task at hand OOP makes this possible through the use of classes, objects, and various means of expressing hierarchical relationships between data ... variable scoping as it relates to functions, were introduced in Chapter 2, “Variables and Data Types.” Nested Functions It is also possible to nest functions within functions, much as you can insert

Ngày tải lên: 09/08/2014, 12:22

... Class Abstraction Sometimes it is useful to create a class that will never be instantiated and instead will just act as the base for a derived class. This kind of class is known as an ab- stract ... class. An abstract class is useful when a program designer wants to ensure that certain functionality is available in any subsequently derived classes based on that abstract class. PHP does not ... array... get_class_vars() The get_class_vars() function returns an array of attributes defined in the class specified by class_name Its syntax is: array get_class_vars (string class_name) An example

Ngày tải lên: 09/08/2014, 12:22

... File System // Increment the   count // Recursive call to display_directory() function display_directory($file, $folder_location, $using_linux, // $init_depth); // Not dealing with a directory ... print " "; $x++; endwhile; print "".basename($file)." "; else : print "".basename($file)." "; endif; endif; // Is_dir(file) endif; // If ! "." or " " endwhile; // close the directory closedir($dh); ... $using_linux, // $init_depth); // Not dealing with a directory else : // Build path In accordance with what OS Is being used if ($using_linux == 0) : $tab_depth = ($current_depth - $init_depth)

Ngày tải lên: 09/08/2014, 12:22

... list of data from which you would like users to select a value Pull-down menus are commonly used for large data sets, a list of American states or countries, for example The syntax is: ... use in almost all of my PHP-enabled Web sites is a header file, such as the one shown in Listing 9-5. This file holds several pieces of information that will be applied sitewide, such as the title, ... ?> Using functions further condenses the code and number of templates needed, ultimately allowing you to more efficiently administer your site. This strategy also makes it easier to reuse your

Ngày tải lên: 09/08/2014, 12:22

... this book. However, the MySQL database server sufficiently summarizes the general capabilities of many of PHP? ?s supported database servers and serves as a base for any SQL-based server. For this ... hostname [:port] [:/path /to/ socket] [, string username] [, string password]) The hostname is the name of the host as listed in the MySQL server privilege tables. Of course, it is also used to ... This is not the case. Depending on the type of query, mysql_query() has different outcomes. In a successful SELECT SQL statement, a result ID is returned that can subsequently be passed to mysql_result()

Ngày tải lên: 09/08/2014, 12:22

... database Its syntax is: boolean session_encode() Executing this function will result in all session data being formatted... session At the same time, a file with the same name as the SID is stored ... 13 the server As the user navigates throughout the site, you may wish to record certain variables as session variables These variables are stored in that user? ?s file Any subsequent call to any ... this also facilitates useful features such as searching and ordering data. I’ll use a MySQL database to store the address information. The table looks like this: mysql>CREATE table addressbook

Ngày tải lên: 09/08/2014, 12:22

... general concepts that would make it possible to begin sharing documents across operating systems and applications: • The document-processing programs must all be able to communicate using a common formatting ... ".date("m-d-Y");?> Processing instructions are useful because they make it possible for several applications to work with the same document in unison. Comments Comments are always a useful feature of ... used to format and display text. The same is true of XML. SGML was born out of the necessity to share data between different applica- tions and operating systems. As far back as the 196 0s, this

Ngày tải lên: 09/08/2014, 12:22

... button looks like this: statbar('Hi! This is the statusbar!'); Inside the brackets we specify the string ’Hi! This is the statusbar!’ This means this string is passed alond to the function statbar() ... button is pressed We pass this.form to the functions in order to be able to address the right elements in the functions later on The function test1(form) tests if the string is empty This is done ... the statusbar - this is the bar at the bottom of your browser window All you have to is to assign a string to window.status The following example shows you two buttons which can be used to write...

Ngày tải lên: 21/12/2013, 04:19

... classes, such as queues, arrays, stacks, and hash tables Database access classes IO classes WinForms classes, for creating user interfaces Network classes Outside the base class runtime, there ... then allows that member to be accessible from classes in the same assembly as itself, but not from classes outside the assembly This is especially useful when several public classes need to cooperate, ... grants the same access as private, except that classes that are derived from this class also have access to the field Protected is therefore used to give classes that derive from this class access...

Ngày tải lên: 19/01/2014, 16:20

... classes, such as queues, arrays, stacks, and hash tables Database access classes IO classes WinForms classes, for creating user interfaces Network classes Outside the base class runtime, there ... then allows that member to be accessible from classes in the same assembly as itself, but not from classes outside the assembly This is especially useful when several public classes need to cooperate, ... grants the same access as private, except that classes that are derived from this class also have access to the field Protected is therefore used to give classes that derive from this class access...

Ngày tải lên: 24/01/2014, 09:20

... affairs.9 Exercises Modify the program CoinTosses to toss a coin n times and print out after every 100 tosses the proportion of heads minus 1/2 Do these numbers appear to approach as n increases? ... pistoles each Then consider, Sir, if the first man wins, he gets 64 pistoles; if he loses he gets 32 Thus if they not wish to risk this last game but wish to separate without playing it, the first ... possible outcomes are 1, 2, 3, 4, 5, corresponding to the side that turns up We toss a coin with possible outcomes H (heads) and T (tails) It is frequently useful to be able to refer to an outcome...

Ngày tải lên: 21/02/2014, 09:20

... conditions, simply expressing that, if these equations have a solution, then necessarily ∂ik F j = ∂ki F j in Ω It is no surprise that these necessary conditions are of the same nature as those of ... in this respect, I am indebted to Arjen Sevenster for his kind permission to rely on such excerpts Otherwise, the bulk of this work was substantially supported by two grants from the Research ... the necessary conditions Rqijk = in Ω are also sufficient for the existence of such an immersion Θ Besides, if Ω is connected, this immersion is unique up to isometries of E3 This means that,...

Ngày tải lên: 17/03/2014, 14:24

... definitions of members that are accessible to subclasses must be CLS types • The parameters of public methods in public classes must be CLS types • The parameters of methods that are accessible to subclasses ... past six years, it is similar Just as a standard COM DLL has a type library, the assembly has a manifest that contains the metadata for the assembly, such as the classes, types, and references ... transactions that spanned multiple components, multiple databases, or both To address these issues, Microsoft created Microsoft Transaction Services (MTS) and COM+ Component Services MTS (in Windows NT 4)...

Ngày tải lên: 24/03/2014, 04:20

... r sin x1 cos x2 y3 = r sin x1 sin x2 cos x3 yn-1 = r sin x1 sin x2 sin x3 sin x4 cos xn-1 yn = r sin x1 sin x2 sin x3 sin x4 sin xn-1 cos xn yn+1 = r sin x1 sin x2 sin x3 sin x4 sin xn-1 sin ... , x r cos x1 sin x2 sin xn-1 cos xn, r cos x1 sin x2 sin xn-1 sin xn) 2 n-1 cos xn, = (0, -r sin x sin x , , r sin x cos x sin x sin x x r sin x1 cos x2 sin x3 sin xn-1 sin xn) 3 = ... xn) 3 = (0, 0, -r sin x sin x sin x , r sin x sin x cos x cos x , x r sin x1 sin x2 cos x3 sin x4 sin xn-1 cos xn, r sin x1 sin x2 cos x3 sin x4 sin xn-1 sin xn), and so on g11 = /x1, /x1...

Ngày tải lên: 27/03/2014, 11:52

... S `VȦ6ics’¬ƒqq đ e £siE S đ “Vê¦6iÄg®ƒV 9s1 ‘#‘yS D US U E Y b t S ò B t ™ “ I I B US U E Y b t S B t q dS € h U b Ê U @ d – U ˆVS U E Y b t ¦6iXsS – skT¦“Ỉ¬¨CAsc¦‘¨¢‘’1TÈ(Ð1saCC¢1XgS ... Eh É @S B U E R E S  s1 1‘¢À#si1‰if@ Va(isPĐg1Ä"¦g1CÀC (s ia53ss”‰3Pr5¬ò s1 isT‘C6VrÊ €h t Ç b Ç US B U b f €h Y `S t E xS B @ xS R E Ê h @S B R @ Y t Ç b Ç US B U b s 5‘1ÍVT(i¢ƒV5PsP‘VT¨¨VT¦1ÄisT“i5P5i5(sC(‘¢f ... E Ĩ I € BShS S ỵ E tS D B t Ç E xS  hhS U bS BS U Õ E Ê E D B b B U bS BS Ê Ê @ E D à I t B R @ D f E B @ US Ê R b b f d b E fS b D f R Ç b b B US € BShS S ỵ E E R b isCV15¦r¬1CĐC‰isCVr1i©1đTC5umC¨VruiͦoX¢gi1u”1‘ĐT s VVs 1s ¦5XTia`...

Ngày tải lên: 27/03/2014, 11:54

... y2 = sin x1 cos x2 y3 = sin x1 sin x2 cos x3 yn-1 = sin x1 sin x2 sin x3 sin x4 cos xn-1 yn = sin x1 sin x2 sin x3 sin x4 sin xn-1 cos xn yn+1 = sin x1 sin x2 sin x3 sin x4 sin xn-1 sin xn ... r sin x1 sin x2 cos x3 yn-1 = r sin x1 sin x2 sin x3 sin x4 cos xn-1 yn = r sin x1 sin x2 sin x3 sin x4 sin xn-1 cos xn yn+1 = r sin x1 sin x2 sin x3 sin x4 sin xn-1 sin xn (d) The torus ... r sin x1 cos x2 y3 = r sin x1 sin x2 cos x3 yn-1 = r sin x1 sin x2 sin x3 sin x4 cos xn-1 yn = r sin x1 sin x2 sin x3 sin x4 sin xn-1 cos xn yn+1 = r sin x1 sin x2 sin x3 sin x4 sin xn-1 sin...

Ngày tải lên: 24/04/2014, 17:08