digital system design book

1 Experiment contents, steps and experience: The understanding of the experiment process, the understanding of the knowledge point in the experiment instruction book. (1) The concept of multithreading? Why do you want to propose multithreading?In a program, these stand-alone program fragments are called "threads", and the concept of programming with it is known as "multithreading." Use multi-threading to improve applicat

20165230 2018-2019-1 "Information Security system Design Fundamentals" The second week study summary of learning Contents There are two general rules for arranging the bytes of an object: The small-end method (least significant byte at the front) and the big-endian (the most significant byte in front). The expression x>>k will shift the X arithmetic right to K (the left side complements the K-effectiv

20145235 "Information Security system Design Fundamentals" No. 09 Week Study summary _1 Exercise 10.1The first problem is usr/include inside no csapp.h and csapp.c downloaded a compressed package from the night, and to understand the pressure tar-xf Code.tarThen put the inside of the Csapp.h and csapp.c into the usr/include inside.Then compile and run c101.c. The descriptor return value is 3.Code HostingImp

, double Int→float will not overflow but may be roundedInt/float→double results retain exact valuesDouble→float may overflow to ±∞ and may be rounded due to small accuracyThe float/double→int rounds to 0 and can overflow.Problems encountered:1. Error in compiling the 28-page code in the bookCheck the code seems to be nothing wrong, do not know why ... at last, I commented out the line . The source code is as follows2. Exercise 2.52 do not understand, I hope the teacher can explain in classI

email carefully-do not send an email to many people, and expect everyone to read it carefully to find out what you expect him to do. 　　Bad email features 1. Writing prose is long and boring, and people are expected to read it-this is unrealistic. 2. The focus is not prominent. Instead, it relies on the recipient to extract key information: time, action, and goal. 3. mass mailing leads to no targeted mail-the opinion in the book "influence" will lead

Summary of learning contents of textbookIn a simple model, the memory system is a linear byte array, and the CPU can access each memory location within a constant time. In fact, a memory system is a hierarchical structure of storage devices with different capacity, cost, and access times. Some of the contents of the book I will not repeat, just need to summarize

The computer in the end is how to run it, in my study of the computer has not been very clear, but recently borrowed this "the Art of Linux kernel design" is to know what the computer from the boot to start the operating system between what exactly do.This book has just started to introduce not Linux startup, but a step before the Linux boot, that is, after you p

of my reading notes, life impressions, current affairs discussion and even open the brain hole, this kind of thing really suitable to send to the blog? After all, send to let the teacher see the things students are also can see, feel what the heart of what things let others see feel good shame ah.What do you think the teacher of this class should continue to do? The teacher has always been a good teacher, which I believe. So I should go on, except that I don't think I should continue.What do yo

and the number of cylinders in a disk is generally the same relationship? Because in the exercise, they are replaced directly with each other.Problem two, the simple way to estimate disk access time is to take the seek time by 2, but in exercise 6.3, so that the results of 16ms and the actual result 10ms difference is very large?Harvest and experience:This time the homework is completed the longest time, spent three days, finally read the book carefu

default cache type by calling the following API. setbuf, SetvbufSetvbuf can accurately describe the type of cache. Fclose The stream is also flushed when the stream is closed. when a process terminates normally (calling exit directly or returning from the main function), all standard I/O streams with non-writable cached data are flushed and all open standard I/O streams are closed. problems encountered(1) Key differences between standard I/O and unix I/OReferences(1) Textbook in-depth understan

. Connect to I/O Devices: Universal Serial Bus (USB), graphics card, Host bus adapter To access the disk: SSD: The SSD packet is plugged into the I/O bus. An SSD package consists of one or more flash chips and a flash translation layer, instead of a mechanical drive in a traditional rotating disk. SSDs consist of semiconductor memory with no moving parts, so the random access time is faster than rotating the disk, consumes less energy, and is more robust. But easy to wear. Different stor

-feeling bad, read a lot of confusion, code execution is also less. This week's code package gives me a good chance to practice understanding! So I just took the code out of the video in handy. The feeling learned a lot of content. In particular, the function of fork such functions are in the execution of the code to feel its principle. It was really touching when I finished it!!!Because there is also a recent project of this course, the internet also searched a lot of communication between the

VOD (Videoondemand) is called video-on-demand, also known as interactive TV on-demand system. The traditional TV system information is transmitted in one way and the user can only receive it passively. And VOD is a "user autonomy" of the new concept based on the two-way video and audio information system, to achieve the needs of users to play video audio programs

Machine learning goals: Let machines learn to complete tasks through several instances. Statistics is a field that machine learning experts often study. The machine learning method is not a waterfall process. It needs to be analyzed, explored, and tried repeatedly. Python is considered a very effective modeling language. One idea is that algorithms are not the most time-consuming, and the time-consuming is: 1. Read and clean data. 2. explore and understand input data. 3. analyze how to best pres

) or positive (s=0), and the sign bit with the value 0 is interpreted as a special case.Mantissa: M is a binary decimal order: E is weighted against floating-point numbers and can be negativeFloat:s=1 bit, exp=8 bit, frac=23 bitDouble:s=1 bit, exp=11 bit, frac=52 bit2. Integers and floating-point numbers indicate the relationship of the same number:P74: The relative region corresponds to the low of the integer, just before the highest significant bit equal to one stop, and a floating point repre

Learning tasks1. Read the textbook and complete the After-school practice (the book has a reference answer)3.1-3.7 in practice, Focus: 3.1,3.3,3.5,3.6,3.9,3.14,3.15,3.16,3.22,3.23,3.27,3.29,3.30,3.33,3.342. Examination: Exercises to change the data3. Experiment: Need to practice in the lab building4. Deepening, practical topics, extra pointsLearning process3.1 Historical view (textbook p103-p105)1978 8086 29K transistors to 2008 Corei7 781M transistor

The computer is how to carry out, in my learning computer is not very clear, but recently borrowed this "the Art of Linux kernel design" is to know what the computer from the boot to start the operating system between what exactly do.This book is not about Linux startup, it's just a step before Linux starts, which is what the computer does when you press the boot

X Server The most common X implementation on Linux and other pc-based systems is XFree86 (URL click to open link) The x server in this package is an X-protocol specially written for various graphics cards used on PC PCs. The X protocol is not only capable of traversing the network, but also applies to the Xlib library between the client and server running on the same machine Most x software needs to use a C language function library as a program design