comparisons among objects and structures chapter one

... methods and other special class methods, and understanding when they are called  Subclassing UserDict to define classes that act like dictionaries  Defining data attributes and class attributes, and ... file's name and location) are known, the handler class knows how to derive other attributes automatically This is done by overriding the setitem method, checking for particular keys, and adding ... all the same keys and values, and strings are equal when they are the same length and contain the same sequence of characters For class instances, you can define the cmp method and code the comparison...

Ngày tải lên: 14/12/2013, 14:15

... elements of type T is a finite sequence of elements of T, in which all insertions and deletions are restricted to one end, called the top Stack is a Last In - First Out (LIFO) data structure Basic ... count = 13 Push data into a Linked Stack Allocate memory for the new node and set up data count n … top pNew X Update pointers and count: pNew->link = top (1) • Point the new node to the top node ... data into a stack having elements and push data into an empty stack (top having NULL value is assigned to pNew->link: that’s corresponding to a list having only one element) count top pNew pNew->link...

Ngày tải lên: 06/03/2014, 17:20

... destination Various complexity and extension of goal seeking problem:  • • • • • • • • • • Having only one start node and one destination Having one start node and some destinations Need to determine ... the brackets are matched or not Pre Post Return opening and closing is one of the brackets: (, [, {, ), ], } Return TRUE if both opening and closing are paired off, FALSE otherwise TRUE or FALSE ... detected) return success 11 Postponement Postponement: The usage of data is deferred until some later point Ex.: * * = 10 Evaluate a Postfix Expression: all operands will not be processed until...

Ngày tải lên: 06/03/2014, 17:20

... Faculty - HCMUT 25 01 December 2008 Pseudorandom Key Pseudorandom Number Generator Random Number Modulo Division Address y = ax + c For maximum efficiency, a and c should be prime numbers Cao Hoang ... HCMUT 27 01 December 2008 Collision Resolution • Except for the direct hashing, none of the others are one- to -one mapping ⇒ Requiring collision resolution methods • Each collision resolution ... hash(B) = B and A collide at hash(C) = 17 A [1] [5] B [9] [17] Collision Resolution Cao Hoang Tru CSE Faculty - HCMUT 12 01 December 2008 Basic Concepts Insert A, B, C hash(A) = hash(B) = B and A collide...

Ngày tải lên: 06/03/2014, 17:20

... appears at only one place in the function, but might be inside a loop: more than one recursive calls!  Recursive call appears at more than one place in the function but only one call can actually ... the same calculations over and over  The amount of time used by the recursive function to calculate Fn grows exponentially with n  Simple iteractive program: starts at and keep only three variables, ... factN End RecursiveFactorial 24 Recursive Solution  The recursive definition and recursive solution can be both concise and elegant  The computational details can require keeping track of many...

Ngày tải lên: 15/03/2014, 17:20

... comparisons of keys  If the tree degenerates into a long chain, search will Ө(n) comparisons on n vertices  The bushier the tree, the smaller the number of comparisons of keys need to be done ... Search Tree  BST is one of implementations for ordered list  In BST we can search quickly (as with binary search on a contiguous list)  In BST we can make insertions and deletions quickly ... BinaryTree A B C D E F G Physical Conceptual i (suitable for complete tree, nearly complete tree, and bushy tree) 2i+1 2i+2 23 Contiguous Implementation of Binary Tree Record Data Parent...

Ngày tải lên: 15/03/2014, 17:20

... expensive: the minimum of d children must be found, which takes d-1 comparisons  The multiplications and divisions to find children and parents are now by d, which increases the running time (If ... position of the root, and ReheapDown is called for that position 14 Delete minimum element from min-heap 31 The element in the last position is put to the position of the root, and ReheapDown is ... BuildHeap 19 Build heap Algorithm BuildHeap2 () Builds a heap from an array of random data Pre Array of count random data Post Array of data becames a heap Uses Recursive function ReheapDown...

Ngày tải lên: 15/03/2014, 17:20

... 43 Divide -and- conquer sorting Algorithm DivideAndConquer() if (the list has length greater than 1) partition the list into lowlist, highlist lowlist DivideAndConquer() highlist DivideAndConquer() ... between indices low and high to two sublists Pre Post Uses low and high are valid positions in contiguous list, with low

Ngày tải lên: 15/03/2014, 17:20

... position = loop (position < subroot->count) AND (target>subroot->dataposition) position = position + // Sequential Search if (position < subroot->count) AND (target = subroot->dataposition) return ... > branch End B_Node B_Tree root End B_Tree 20 Methods and Functions SearchTree (calls) recursiveSearchTree SearchNode Insert recursiveInsert splitNode ... Basic Concepts Basic Concepts Trees Trees and Orchard Lexicographic Search Tree Multiway Trees 10 11 M-Way Search Tree 12 13 14 15 B-Tree...

Ngày tải lên: 15/03/2014, 17:20

... M-Way Search Trees • Each node has m - data entries and m subtree pointers • The key values in a subtree such that: – >= the key of the left data entry ... Insertion • Insert the new entry into a leaf node • If the leaf node is overflow, then split it and insert its median entry into its parent Cao Hoang Tru CSE Faculty - HCMUT 17 November 2008 B-Tree ... Algorithm insertEntry (val node , val entryNdx , val newEntry ) Inserts one entry into a node by shifting nodes to make room Pre Post node is pointer to node to contain...

Ngày tải lên: 15/03/2014, 17:20

...  Continue work on AASHTO Standard analysis engine - Add P/S concrete girder analysis and rating - Add R/C continuous beam and slab analysis and ratingTwo Bridges, One Project | Sections & - Funded ... Enhancements – Dec 05 Virtis and Opis Superstructure  New AASHTO standard analysis engine - Engine from PennDOT under special agreement - Steel girder, R/C slabs and beams analysis and rating (LFD) - ... Virtis and Opis Superstructure  Non-Standard gage vehicle analysis - Uses AASHTO FEA engine - Funded by Alabama, New York State, Illinois and Montana DOTs along with SC&RA Two Bridges, One Project...

Ngày tải lên: 06/09/2012, 15:57

... Chapter I/O Streams as an Introduction to Objects and Classes Copyright © 2007 Pearson Education, Inc Publishing as Pearson Addison-Wesley Overview 6.1 Streams and Basic File I/O ... Slide 6- 19 Objects  An object is a variable that has functions and data associated with it  in_stream and out_stream each have a function named open associated with them  in_stream and out_stream ... Addison-Wesley Slide 6- 21 Objects and Member Function Names  Objects of different types have different member functions  Some of these member functions might have the same name  Different objects of the...

Ngày tải lên: 12/09/2012, 22:49

... wear unevenly and push the flow-control element down 30 Globe Valves Hand Wheel Nut Washer Figure 2.5 Globe Valve Components Hand Wheel Yoke Sleeve Stem Gland Nut Gland Bolt Gland Bolt Pin Gasket ... systems and operations • Reactor systems and operations Key concepts and learning features include: • Valves, piping, tanks, and vessels • Pumps, compressors, and simple systems • Turbines and motors ... designs and safety considerations • Scroll and diaphragm compressors • Compressor systems and operations • Heat exchanger and cooling tower systems and operations • Steam generation and furnace...

Ngày tải lên: 15/08/2013, 07:50

... pronounced between 950° and 1,000°F (510°C and 537.77°C) For example, at 950° and 1,000°F (510°C and 537.77°C), the strength of low-carbon steel is about one- third and one- sixth, respectively, ... somewhat flattened top and bottom Cone-Roof Tanks: Low to Medium Pressure A cone-roof tank has a fixed, slightly conical roof, one or more inside support columns, and a flat bottom Cone-roof tanks are ... cobalt, and molybdenum Some typical examples of these alloys are Monel, Hastelloy, and Inconel These alloys are used in a variety of services that involve acids and caustics For example, Monel is...

Ngày tải lên: 16/08/2013, 15:29

... have a flexible pressure range and overall capacity, low power cost, and high efficiency rating They can handle density and gas composition changes, and small volumes and can deliver high pressures ... 5.11 Scroll Compressor 129 Chapter ● Compressors run quietly and smoothly at lower volumes, trapping fluid between the scrolls In most cases, one scroll is fixed and one orbits eccentrically without ... Membranes are designed to be durable and tough and able to withstand high temperatures and a variety of conditions Diaphragm compressors can generate very high pressures and are used to compress hydrogen,...

Ngày tải lên: 19/08/2013, 10:47

... Shell Outlet Cone Plug Cone Plug Nut 169 Chapter ● Heat Exchangers Shell -and- Tube Heat Exchangers The shell -and- tube heat exchanger is the most common style found in industry Shell -and- tube heat ... hold the baffles in place and prevent vibration and excessive tube movement Nozzles and Accessory Parts Shell -and- tube inlet and outlet nozzles are sized for pressure drop and velocity considerations ... shell and tube, reboiler, plate and frame, air cooled, and spiral The shell -and- tube heat exchanger is the most common in the process industry Shell -and- tube heat exchangers are designed to handle...

Ngày tải lên: 20/08/2013, 10:39

... water and steam flow rates and temperatures and water level in the boiler The operator also checks for smoke and checks burner and flame pattern The operator maintains good housekeeping and unit ... contract and open Steam causes the bellows to expand and close Bellows traps can handle condensate and noncondensable gases Steam Generation System Steam-generating systems are very large and very ... combustion Basic Components of a Furnace Fired heaters come in a variety of shapes and sizes They have different tube arrangements and feed inlets and burn different types of fuels and have different...

Ngày tải lên: 21/08/2013, 10:47

... material codes, and steam traps Pumps and Tanks Pumps and tanks come in a variety of designs and shapes Common pump and tank symbols are shown in Figure 12.11 Compressors, Steam Turbines, and Motors ... technicians and instrument and electrical, mechanical, safety, and engineering personnel In order to read a P&ID, the technician needs an understanding of the equipment, instrumentation, and technology ... among plants; others differ from plant to plant Some standardization of process symbols and diagrams is taking place The symbols used in this chapter reflect a wide variety of petrochemical and...

Ngày tải lên: 23/08/2013, 14:30

... existing industries and created new ones The steel and metal fabrication and manufacturing, glass, machining, rubber, petroleum, concrete and stone industries, and many others had to develop new ... excessive pressure drops, and impurities in the feed or product streams The type and quantity of instrumentation are usually determined by past data and experience and from research and development Reactor ... substance from one condition to another: P1V1 T1 P2V2 T2 Ideal and Nonideal Systems Efficient tower operation requires an operator to understand the theory of distillation and the key components of...

Ngày tải lên: 23/08/2013, 14:47