Spread-spectrum techniques are methods by which electromagnetic energy generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of secure communications, increasing resistance to natural interference and jamming, and to prevent detec
Sensing and planning are at the core of robot motion. Traditionally,
mobile robots have been used for performing various tasks
with a general-purpose processor on-board. This book grew out of
our research enquiry into alternate architectures for sensor-based
robot motion. It describes our research starting early 2002 with the
objectives of obtaining a time, space and energy-efficient solution
for processing sensor data for various robotic tasks.
New algorithms and architectures have been developed for
exploration and other aspects of robot motion. The research has
also resulted in design and fabrication of an FPGA-based mobile
robot equipped with ultrasonic sensors. Numerous experiments
with the FPGA-based mobile robot have also been performed and
they confirm the efficacy of the alternate architecture.
In the rectangle packing problem, encoding
schemes to represent the placements of rectangles
are the key factors of efficient algorithms. In
1995, an epoch-making encoding scheme
Universal.Data.Access.Components 2.50
Universal Data Access Components (UniDAC) is a library of components that provides direct access to most popular database servers from Delphi, Delphi for .NET and, C++Builder. UniDAC can work with such servers as Oracle, Microsoft SQL Server, MySQL, Interbase, Firebird. The UniDAC library is designed to help programmers develop faster and cleaner cross-database applications. UniDAC is a complete replacement for such standard universal technology as dbExpress. UniDAC is a handy in use and efficient data access solution bringing into play many features specific to each server.
*** HyperString v6.0 ***
(c)1996-2000 EFD Systems, All rights reserved
efd@mindspring.com
*** THIS IS NOT PUBLIC DOMAIN SOFTWARE ***
See below for license agreement, disclaimer, installation and use.
Introduction ---------------------------------------------------------
Welcome to HyperString!
One of the most significant new features with Delphi32 is long dynamic
strings. However, the built-in functions don t really exploit the full
potential of these new strings. HyperString provides over 400 fast,
efficient string management routines to help you realize the full power
of this highly versatile new data type.
Some of the contents of this paper are adapted from the author’s book Real-Time UML:
Developing Efficient Objects for Embedded Systems published by Addison-Wesley, 1998.
hcon是工作在Linux控制臺下的高效雙字節(jié)中/日/韓(CJK)虛擬終端，就像DOS環(huán)境中的UCDOS一樣，為控制臺(console)環(huán)境提供完整的雙字節(jié)語言環(huán)境。-zhcon work in the Linux console is under the efficient double-byte Chinese / Japanese / Korean (CJK) virtual terminal, just like DOS environment UCDOS same for console (console) environment to provide a complete double-byte language environments.
Faster, better, and cheaper is the name of the game for machine designers. Demands for higherperformance
and increasingly efficient machines designed in a shorter amount of time with smaller design
teams are challenging machine designers to improve their machine design processes.
The Fortran 90 Handbook is a definitive and comprehensive guide to Fortran 90
and its use. Fortran 90, the latest standard version of Fortran, has many
excellent new features that will assist the programmer in writing efficient,
portable, and maintainable programs. The Fortran 90 Handbook is an informal
description of Fortran 90, developed to provide not only a readable
explanation of features, but also some rationale for the inclusion of features
and their use. In addition, “models” give the reader better insight as to why
things are done as they are in the language.
Collection of key-value pairs.
TDictionary represents a generic collection of key-value pairs.
This class provides a mapping from a collection of keys to a collection of values. When you create a TDictionary object, you can specify various combinations of initial capacity, equality operation, and initial content.
You can add a key that is associated with a corresponding value with the Add or AddOrSetValue methods. You can remove entries with Remove or Clear, which removes all key-value pairs. Adding or removing a key-value pair and looking up a key are efficient, close to O(1), because keys are hashed. A key must not be nil (though a value may be nil) and there must be an equality comparison operation for keys.
You can test for the presence or keys and values with the TryGetValue, ContainsKey and ContainsValue methods.
The Items property lists all Count dictionary entries. You can also set and get values by indexing the Items property. Setting the value this way overwrites any existing value.
The class TObjectDictionary inherits from TDictionary and provides an automatic mechanism for freeing objects removed from dictionary entries.
