20191317 "Introduction to information security professionals," the fourth week of learning summary

Teaching materials summary

I understand gates and combinational circuit, as well as embedded systems and parallel structures, in reading "is self-craft", I also learned to write the rules of the string, the string identifies the knowledge and data containers. Again, I was in class this Saturday Principal Association preliminary understanding python to use.

Gate circuit: a logic gate circuit is the basic logic units various digital circuits and digital systems, the digital circuit is one of the key. In order to facilitate rational selection and proper use of the integrated digital device, must be familiar with their main parameters such as input voltage, output high and low current range, noise margin, the number of fan-in, fan-out number, average transmission delay time and power consumption Wait.

Embedded Systems: Embedded system is application-centric, modern computer technology, special purpose computer system can be in accordance with user requirements (function, reliability, cost, size, power consumption, environment, hardware and software modules such as flexible cutting point. summarized as, application-centric, specificity, modern computer technology as the core software and hardware can be cut.

Parallel architecture: parallel architecture generally refers to the parallel architecture and software architecture taking parallel programming. The main purpose is to make the data more tasks or run concurrently. It refers to a parallel architecture architecture many instructions can be simultaneously performed; generally parallel programming the following modes: a shared memory mode; message passing model; parallel mode data. In the database, and query in order to improve the access rate, simultaneously using two or more parallel structure.

Textbook learning problems encountered and solutions

I finished the job class cloud course of time "to implement other logic gates using NOR gate," and could not immediately understand how to solve this problem, so I find the logical relationship between different gate and a NAND gate on the Internet implement some data from other logic gates, together with their reasoning and thinking, I successfully solved the problem.

This is an example implemented by a NOR gate and the door:

This is an exclusive OR gate

We can start with this simplified illustration look XOR gate, then use the NOR gate XOR gate may be a little easier to understand: (This is an exclusive OR gate)

Learn sentiment

I think the logic gate may not understand at the time new to, but once mastered, it becomes very simple to solve some of the problems associated with logic gates will become much easier.

Reference material

And realization of the principle of the NOR gate

Embedded Systems

Parallel structures