How to provide computing power with computer

1. 1. The computing power of mobile phones now exceeds that of the Apollo spacecraft of the United States at that time
2. The computing power of desktop computers using mobile phones requires the support of hardware and software
3. If you are interested, you can study SETI's software and use computer computing resources all over the world to search for aliens

2. The floating-point computing power of single processor is 3tflops

MPE, 8gflops

CPE, 11gflops

the peak computing power of Shenwei Taihu Lake light system reaches 100pflops<

it is necessary to mention here that floating-point computing power refers to the processing power of computer floating-point computing, and the computer has a special floating-point processor FPU for floating-point processing.

home computer 2G Hz, 4G Hz refers to the dominant frequency of the computer, the dominant frequency is 4G Hz, and the floating-point processing power of the computer is about 4gflops. However, the dominant frequency is not equal to floating-point processing power

dominant frequency means the number of computer clock cycles per second. The more processing per second, the more powerful the computer is

the main frequency of CPU does not represent the processing power of CPU and the influence of instruction pipeline on the processing power of CPU

clock cycle is the basic unit of CPU operation, and a floating-point calculation may need several to dozens of clock cycles. So the relationship between the dominant frequency and floating-point processing power is obvious.

3. Do you say PC? In my opinion, any computer has the ability of parallel computing. It depends on how you define it. Parallel computing and distributed system are both computing methods, not hardware specifications

each task in your operating system has a process, and each process is composed of many threads. If you've ever had an operating system class, you should have met multi threads programming. You let different threads cooperate to complete the same task, which is actually called parallel computing and distributed processing.

you can see that the projects of those parallel computing classes also run algorithms with ordinary computers, The key point is that you will simulate this environment. Just like those who run network algorithms use socket to simulate, they also use a PC to simulate the network of N workstations.

if you say multi-core CPU, First of all, you don't have access to the firmware of ordinary motherboards. So you have to buy a programmable board of general purpose, But if you want to buy a multi-core basic, you can't find it... Only in the laboratory can you have it... Even if you find it... I think that the money for that board is estimated to be several times of the tuition for you to go to graate school and then enter the laboratory...

in a word, if the software is implemented, today's PC should have no problem, As for how to start parallel computing mode, you need to read the datasheet of this board.

I don't agree with the above saying that there must be two cores, People with two brains can do parallel. But the left brain and the right brain of one brain are also parallel. When refining different neurons, the other completely independent neuron is also parallel. Parallel is a way to solve problems, an idea. Parallel computing was first proposed in 1912. I can't remember when the multi-core processor appeared, But after 2000, at least

4. That is remote control, right? At present, there are many remote control systems on the Internet, such as grey pigeon, cyber man and so on. At present, I am using 51MyPC, which has been used for nearly half a year. I feel good
in order to avoid the suspicion of advertising, you don't need to send the website. You can search the Internet directly. There are instructions on the official website

5. The work done by gravity is related to the initial and final position of the object, but not to the path

work w = - Mg * (z2-z1) = - 100 * 9.8 * (2-8) = 5880 (Jiao)

[welcome to inquire, thank you for adopting!]

6. There are different instruction sets.
if you play 360 games with PC through simulator,
you are in a circle.
you should understand the story of tortoise and rabbit race

7. It's a good idea, but even if you calculate the data step by step, and then combine the data, you must connect multiple devices before. Since you want to connect, there is a problem of delay. Even if it's very small, there is still some, which is of little significance

8. In the process of using XP, the running speed of the system will become slower and slower with the passage of time. Some friends may think of reloading the system, but after reloading, the common application software also needs to be re installed, which may be more troublesome. How to speed up XP without re installing the system

as long as you operate according to the following nine aspects, I believe your XP will run at a high speed again

first, speed up the startup and shutdown speed

in Windows XP, the system will send a message to the running program and remote server to tell them that the system needs to shut down, and wait for the response before the system starts to shut down. To speed up the startup speed, you can set the auto end task first

1. Find HKEY first_ CURRENT_ Set the key value of autoendtasks to 1 in UserControl panel desktop

2. Next, there is a "hungapptimeout" under the branch. Change its value to "4000 (or less), and the default value is 50000

3. Finally, find HKEY_ LOCAL_， Similarly, set waittokillservicetimeout to "4000"; Through this setting, the shutdown speed is much faster< Second, improve the speed of broadband

professional version of Windows XP retains 20% of the bandwidth by default, which actually has no effect on our indivial users. In particular, it is better to make full use of it

enter gpedit.msc in "start → run" to open the Group Policy Editor. Find "computer configuration → management template → network → QoS packet scheler", select "limit reserved bandwidth" on the right, select "properties" to open the limit reserved bandwidth Properties dialog box, select "enable", and change the original "20" to "0", thus releasing the reserved bandwidth< When using Windows XP network neighborhood, the system will search its own shared directory, printers that can be used as network share, scheled tasks and network related scheled tasks, and then display them. Obviously, the speed will be much slower. If these functions are of little use to us, we can delete them. Find HKEY in the registry editor_ LOCAL_ ， Delete the (printer) and {d6277990-4c6a-11cf8d87-00aa0060f5bf} (scheled task), restart the computer, visit the Internet neighbor again, you will find that it is much faster< Fourth, speed up the startup speed

to speed up the startup speed of Windows XP. You can achieve this goal by modifying the registry. In the registry editor, find HKEY_ LOCAL_ Managermemory managementprefetchparameters, find the enable prefetcher primary key on the right, and change its default value of 3 to 1. In this way, the scrolling time of the scroll bar will be reced< Some times, XP will prompt you to stop responding. It's very annoying. By modifying the registry, we can let it close by itself. In HKEY_ CURRENT_ Change the value of the character key value of autoendtasks to 1 in the user control panel desktop, and then log off or start again< In order to speed up the display speed of the menu, we can set it according to the following methods: we can set it in HKEY_ CURRENT_ Find the "menusholdelay" primary key under the user control panel desktop and change its value to "0" to speed up the menu display< 7. Clear the unused DLL files in the memory_ LOCAL_， Add an item alwaysunloaddll in Explorer. The default value is set to 1. Note: if the default value is set to 0, the function will be disabled< 8. Speed up the pre reading ability and improve the startup speed

Windows XP pre reading setting can improve the system speed and speed up the startup speed. The following modification can further make good use of CPU efficiency: HKEY_ LOCAL_ In the window on the right of prefetchparameters, change the numerical data of the enable prefetcher as follows: for example, if the PIII 800MHz CPU is used, it is recommended to change the numerical data to 4 or 5; otherwise, it is recommended to keep the numerical data as the default value, that is, 3< 9. Rece the number of items to be loaded ring startup. Many applications will be added to the system startup group at the time of installation, and the system will run automatically every time. This not only prolongs the startup time, but also consumes the system resources after startup

start the "system configuration utility". The "start" item lists the items and sources loaded when the system starts. Carefully check whether you need it to load automatically. Otherwise, clear the check box before the items. The fewer items loaded, the faster the startup. This item needs to be restarted to take effect< If you want to access the Internet easily and smoothly, do you notice that the available space of your computer system disk is decreasing day by day? Is it like the old monkey king that moves slowly day by day

Yes! In the process of windows installation and use, there will be a lot of junk files, including temporary files (such as *. TMP, *_ MP) log files (. Log), temporary help files (. GID), disk check files (. Chk), temporary backup files (such as *. Old, *. Bak) and other temporary files. Especially if the temporary Internet Files folder of IE is not cleaned up for a period of time, the cache files in it sometimes occupy hundreds of MB of disk space. These LJ files not only waste valuable disk space, but also make the system run slowly. I'm sure you can't stand this!

9. First of all, we need to make a constraint on "stronger computing power", because in addition to the calculation speed of CPU / GPU, we also need to consider the data transmission speed (bandwidth) between multiple computers and disk I / O. In many cases, the time consumed by data transmission is much longer than the computing time
all tasks supporting parallel computing can be split into multiple parallel computing processes. Taking maprec as an example, most maprec algorithms need to satisfy the commutative law and the associative law. Therefore, it is necessary to ensure that the tasks performed meet the requirements of parallel computing models (maprece, MPI, etc.), including algorithm and data structure. Or, the results of the original algorithm can be approximately obtained by using the algorithm satisfying the parallel computing model
from the implementation level, the simplest way is to use the existing parallel computing framework, such as MPI / openmpi, to write algorithms to perform tasks in its framework. Using Hadoop is another choice, but Hadoop is more suitable for big data storage than computing intensive tasks because it is a master-slave structure and has some overhead for disaster recovery support
btw: the SLI and crossfire technologies of GPU can also be regarded as such an implementation to some extent.

10. I'll teach you a way to deal with any similar operation:
1. Calculator, I won't say more
2. Using the office software Excel to calculate the computing power:
open the office software Excel, Then write the following in any cell:
find the square of 2: = 2 ^ 2
similarly, the fourth power of 3 = 3 ^ 4

find the square root of 2 = sqrt (2) this is a special formula
but the third power root of 2 needs to use power operation = 2 ^ (1 / 3)
similarly, any root mean square operation can be found
for example, the 50th root mean square of 100 = 100 ^ (1 / 50)

about others The operation of Excel can be basically completed. Excel has powerful functions and can simply and effectively complete our common calculations. If you study it carefully, you will have a great harvest
I wish you success!