It has been suggested1 that an appropriate figure of merit for a low probability of intercept and
detection (LPI/D) waveform is the quantity “Range x Bandwidth / Joule”. That is, the further the
range, the wider the bandwidth and the less amount of energy used to achieve these values, the
more covert is the resultant communications system.
The basic principle using the branchand-
bound strategy to solve the traveling
salesperson optimization problem (TSP)
consists of two parts.
There is a way to split the solution space.
There is a way to predict a lower bound for a
class of solutions.
There is also a way to find an upper bound of
an optimal solution.
If the lower bound of a solution exceeds this
upper bound, this solution cannot be optimal.
Thus, we should terminate the branching
associated with this solution.
The SP486 and SP487 are low–power quad differential line drivers meeting RS-485 and RS-422
standards. The SP486 features a common driver enable control the SP487 provides independent
driver enable controls for each pair of drivers. Both feature tri–state outputs and wide
common–mode input range. Both are available in 16–pin plastic DIP and SOIC packages.
The CSS Cookbook cuts straight through the theory to provide hundreds of useful examples and CSS code recipes you can use immediately to format your web pages. Reflecting CSS2 and including topics that range from basic web typography and page layout to techniques for formatting lists, forms, and tables, the CSS Cookbook is a must-have resource for any web author who has even considered using CSS.
Modern, large scale, display systems are
migrating from traditional technologies such as
incandescent, fluorescent and mechanical to
sophisticated products based on LEDs. LED
displays offer power savings and a superior
visual experience in a range of products from
programmable signage to large-scale video
displays and commercial installations.
Enhanced version of the Serial Peripheral Interface available on Motorola s MC68HC11 family of CPUs.Enhancements include a wider supported operating frequency range, 4deep read and write fifos, and programmable transfer count dependent interrupt generation.
As with the SPI found in MC68HC11 processors the core features programmable clock phase [CPHA] and clock polarity [CPOL]. The core features an 8bit wishbone interface.
Very simple, very small.
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DESCRIPTION
The DCP0105 family is a series of high efficiency, 5V
input isolated DC/DC converters. In addition to 1W
nominal galvanically isolated output power capability,
the range of DC/DCs are also fully synchronizable.
The devices feature thermal shutdown, and overload
protection is implemented via watchdog circuitry.
Advanced power-on reset techniques give superior
reset performance and the devices will start into any
capacitive load up to full power output.
The DCP0105 family is implemented in standard-
molded IC packaging, giving outlines suitable for high
volume assembly.
在網(wǎng)絡(luò)安全中經(jīng)常會遇到rootkit，NSA安全和入侵檢測術(shù)語字典( NSA Glossary of Terms Used in Security and Intrusion Detection)對rootkit的定義如下：A hacker security tool that captures passwords and message traffic to and from a computer. A collection of tools that allows a hacker to provide a backdoor into a system, collect information on other systems on the network,mask the fact that the system is compromised, and much more. Rootkit is a classic example of Trojan Horse software. Rootkit is available for a wide range of operating systems.
