Linux systems: Ubuntu 14.04Install Bumblebee to manage dual graphics, the following command will automatically install the Nvidia graphics driversudo add-apt-repository ppa:bumblebee/stablesudo apt-get updatesudo apt-get install bumblebee
Operating system upgrade to Windows 10 will be in C disk to generate a Windows.old folder, generally occupy a larger C disk space, resulting in a C disk space is insufficient.
Reason analysis:
This folder is the data for the operating system
First install the Lenovo settings program in the App Store and update the website's "Lenovo Battery gauge for Windows 64-bit-notebooks" drive, and then restart your computer to open the Lenovo Settings, the option to find the battery charging
The computer keyboard is broken, the typing party. Repairs are usually slaughtered. Buy a keyboard on your own online to pack the wholesale price. is so willful.
1, Ready tools, disconnect the power, remove the battery.
2. Use a
1, the replacement of solid state hard drive (SSD)
First turn off the computer, then remove the mobile battery (note: There are two batteries, the inside and together), unscrew the screws, open the back cover can be opened after the image:
Only
ThinkPad logo is displayed, press F2 to enter the BIOS Utility.
ThinkPad 365X/XD Series
ThinkPad 380 Series
THINKPAD 560 Series
ThinkPad 600 Series
ThinkPad 755 Series
ThinkPad 7
series: s85x,s80x,s78x,s77x,s74x,s72x,s71x (H61-ivybridge platform), s59x,s56x,s51x,s52x,s31x,s32x.
Yang Tian a series (Q87,q77,q75,b75,h81,h61-ivybridge,a75 platform)
Yang Tian M series (H81,h61-ivybridge,a75,a68 platform)
Yang Tian T Series (H81,h61-ivybridge,a75 platform)
Yang Tian R series (H61-ivybridge,a75 platform)
Yang Tian W series (H81,h61-ivybridge platform)
ThinkCentre series desktop, integrated machine
ThinkCentre m8400t (Q77 platform), ThinkCentre m8400s (Q77 platform)
Thi
holding down the ESC key (satellite 17xx,30/31,3000 series machine startup, hold down the F12 key, SATELLITE5XXX series DOS-free mode of the BIOS setup interface, can only be set by the first way). To use this method, you must turn off the computer first, and the suspend or hibernate state is invalid. First press the boot button to power on, and then quickly hold down the ESC key (or you can press ESC first and then power on). When the system self-test is complete, the user will be prompted to
points of the transformation can be expressed as:
According to the transformation formula:
Define several auxiliary variables:
All for 0 o'clock the transformation plane is parallel to the original, and can be obtained:
Not for 0 o'clock, get:
The transformed matrix can transform a square to a quadrilateral. Conversely, the quadrilateral transformation to the square is the same. So we can transform any quadrilateral to another quadrilateral by two transformations: quadrilateral transformati
traditional BIOS password protection.
IBM Notebook Password Detailed
Applicable models:
All ThinkPad 380; all ThinkPad 380D; all ThinkPad 380ED; all ThinkPad 380XD; all ThinkPad 380Z; all ThinkPad 560; all
transformation, which let me pay attention to, want to re-review (learning) this knowledge point. Also searched a lot of blog posts, but did not specify the downward transformation, just gave an example of how to use, instead of upward transformation spoke a bunch (maybe I did not find).This blog is about the downward transformation, then we will learn the downward transformation, to understand the significance of this feature and the use of the sceneCreate an electronic product interface as fo
,a25,a26,a27,a28,a29},{A31,a32,a33,a34,a35,a36,a37,a38,a39},{a41,a42,a43,a44,a45,a46,a47,a48,a49}};So it corresponds to a two-dimensional tree-like array c[][]?Remember:B[1]={a11,a11+a12,a13,a11+a12+a13+a14,a15,a15+a16,...} This is the first row of a one-dimensional tree arrayB[2]={a21,a21+a22,a23,a21+a22+a23+a24,a25,a25+a26,...} This is a one-dimensional tree array of the second rowB[3]={a31,
Title Link: POJ 1195 Mobile Phones"The main topic", the start operation is 0 initialized s * S size map with a value of 0Action 1, enter X Y A, change the value of coordinates (x, y) in the map to aOperation 2, input L B R T query interval (x, y) lAction 3 Closing the programA typical two-dimensional tree-like arrayTwo-dimensional tree arrays and one-dimensional tree arrays are the same principle.We first look at the one-dimensional tree array C "MAXN",Its storage structureC1 = A1C2 = A1 + A2C3
Q: Find the number of set bits in a given integer
Sol: Parallel Counting: MIT HAKMEM Count Hakmem (hacks memo) is a legendary collection of neat mathematical and programming hacks contributed mostly by people at MIT and some elsewhere. this source is from the mit ai labs and this brilliant piece of code orginally in assembly was probably conceivedIn the late 70's.
Int bitcount (unsigned int U){Unsigned int ucount;
Ucount = u-(u> 1) 033333333333)-(u> 2) 011111111111 );Return (ucount + (ucount>
Two, the tree-like array can be extended to two-dimensional.
Problem: A large matrix made up of numbers that can perform two kinds of operations
1 to a number in the Matrix plus an integer (can be positive and negative)
2 Query a matrix of all the numbers and requirements for each query, output results.
A one-dimensional tree array can easily be extended to two-dimensional, in two-dimensional cases: array a[][] The tree array is defined as:
C[x][y] =∑a[i][j], of which,
X-lowbit (x) + 1 Y-low
today, a netizen has a problem:give the following parent-child structure (you can describe it in a similar structure in your language, the first column is the parent, the second column is the child), and comb it into a similar hierarchical parent-child structure. Origin= [('A112','A1122'), ('A','A1'), ('A','A2'), ('A1','A11'), ('A2','A21'), ('A2','A22'), ('A','A3'), ('A22','A221'), ('A11','A111'), ('A21','A211'),
.
Open or restart the computer;
When you see the Dell icon, press the "F2" button to enter the system setup (BIOS) immediately;
Each brand notebook computer enters the BIOS method
IBM (Cold Boot Press F1, part of the new number can be restarted when the press F1)
1.ThinkPad 315ED
After the boot, when you see the screen on the ThinkPad logo, quickly press the F2 key to enter the BIOS.
2.
on the list. Slatebook 14 runs the Android system, and such Android notebooks are not common in the market. Although the Android operating system built for mobile platforms has some productivity gaps compared to desktop operating systems such as Windows and OS X, the test Slatebook 14 of the time to 6 hours and 52 minutes, easily surpassing many windows laptops.
And it is worth mentioning that the proposed retail price of Slatebook 14 is only 430 U.S. dollars (about 2628 yuan), and the current
Inverted index. GIN is designed for handling cases where the items to was indexed are composite values, and the queries to being handled by The index need to search for element values appear within the composite items. For example, the items could is documents, and the queries could be searches for documents containing specific word S " Here are the syntax for the creation of a GIN index: warehouse_db=# CREATE index index_name on table_name USING GI N (column_name); The GIN index requir
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