and Pylab_examples sample code: annotation_demo.py.
Do not continue unless you have read the basic callout, text () and annotate (). Advanced Annotations use boxes and text to label
Let's start with a simple example.
Source
The text () function in the Pyplot module (or the text method of the Axes class) accepts the Bbox keyword parameter and, when provided, draws a box around the text.
The patch object associated with the text can be accessed in the following ways:
bb = T.get_bbox_patch ()
Th
Address: http://www.pcbres.com/pcbtech/circuit/20070612145.html
URL: http://www.360doc.com/content/10/1227/16/4920904_81765495.shtml
This section describes the PCB wiring and some common rules for PCB painting. When you use PCB layout, you can refer to these materials to draw a high-quality PCB. Of course, you can also flexibly adapt to your actual needs.
This is a complete PCB layout design rule, from the layout of components to component arrangement, to wire wiring, and line width and spacing,
Address: http://blog.csdn.net/baiduluckyboy/article/details/6027547
The first note is that the encapsulated library file is stored under Allegro, not orcad. allegro is a PCB painting tool, and orcad is a Sch painting software that can generate a variety of network tables. after Allegro is installed, the built-in library file path is: C:/Cadence/spb_15.5/share/PCB/pcb_lib/symbols (my files are installed on the C drive, and other disks are similar)
The files under symbols are library files. In fa
box, select VCC in the Net Name drop-down box, and define this layer as a VCC network. The previous step was just to get a VCC name, the same element pins and passing holes as the VCC network are automatically connected to the layer, so that no wiring is required.Define the network for the Gnd layer in the same way and define it as a Gnd network. Click OK to close the dialog box. At this time, we found that in the PCB, the center of some Pad componen
difficulties. 1.3a, 1.3b and 1.3c are shown.1.4 Screw hole metallization, the design of the pad is unreasonable.Screw holes are used to secure the PCB board with screws. In order to prevent excessive wave soldering after plugging, screw hole inside the wall does not allow copper foil, over the crest surface of the screw hole pads need to be designed to "m" or plum-shaped (if the wave soldering using the carrier, may not exist above problems). 1.4A an
For more information about down_interruptible-general Linux technology-Linux programming and kernel, see the following. Recently, I was looking at the rt73 chip wireless NIC Driver, which contains several lines of code.
While (down_interruptible ( pAd-> mlme_semaphore) = 0)
{
If (! Netif_running (pAd-> net_dev ))
Continue;
/* Lock the device pointers, need to check if required */
If (down_interruptible (
Dance blanket songs can be made by ourselves. Based on our production experience, we can organize them as follows:1. Select an easy-to-use production toolThe dance blanket game program itself provides the dance function, but it is troublesome to use it. stepmania4.0 Chinese version is recommended here.2. Add your mp3 songs to the stepmania4.0 Chinese edition game program.First, install stepmania4.0 in Chinese. After this program is installed, a "stepmania
*/char pad[3]; /* 3 bytes */int x; /* 4 bytes */PAD[3] Character array represents the fact that there are 3 bytes of useless space in the struct. The old-fashioned term is called "slop (Puddle)".Compare what happens if X is a 2-byte short integer :char *p;char c;short x;In that case, the actual memory distribution becomes this:char *p; /* 4 or 8 bytes */char C; /* 1 byte */char
1 First make Flash1) Calculate the data before making the pads.Thermal Relief (hot air pad): inner diameter (ID) = Aperture +20mil od (OD) = anti_pad diameter = Regular pad + 20mil opening width spoke width = (od-id)/2 +1 0milBore aperture drill_size = 0.9mm, ID = 1.4mm, OD = Regular pad + 20mil = drill_sizex1.5 + 20mil = 1.4mm +20m Il = 1.9mm Spoke width = 0.5
Are you still using libswscale for Pixel format conversion of Images Using FFMPEG? Hey, it's out of date!
FFmpeg has something new: libavfilter. Using It can completely replace libswscale, and can automatically complete some complex conversion operations. libavfilter, all of which are good! But it is too complicated...
If you only process image pixel format, it is quite simple to use libswscale. You can check the latest ffplay. the code in C is surrounded by # If config_avfilter # endif, which i
variables in the memory. Consider the following variables at the top of the C module:
char *p;char c;int x;
If you do not know the Data Alignment, You may assume that these three variables occupy consecutive bytes in the memory. That is, on a 32-bit machine, the 4-byte pointer is followed by a 1-byte char, followed by a 4-byte int. On 64-bit machines, the only difference is that the pointer is 8 bytes.
This is the actual situation (on x86 or ARM or any self-aligned machine): p is stored in 4
() function to release the memory resources it occupies:Gst_element_unref (Element);GStreamer uses the same mechanism as gobject to manage properties, including query, set, and read (get). All Gstelement objects need to inherit the most basic attribute of name from their parent gstobject, because they are like gst_element_factory_make () and Gst_element_factory_ A function such as create () uses the name attribute when creating the factory object and the Component object, and can set and read t
String ClassCHARSET (str)//return string character setCONCAT (string2 [,...])//connection stringINSTR (string, substring)//returns the position where substring first appeared in string, no return 0LCASE (string2)// Convert to lowercaseLeft (string2, length)//The length of the string from string2Length (string)//stringload_file (file_name)//read content from FileLOCATE (substring, string [, Start_position]) same as InStr, but can specify start positionLpad (string2, length,
Tags: star rollback troubleshooting Flash back here requires and restores the OSIDownloadgit clone https://github.com/danfengcao/binlog2sql.git PrincipleUsing Python to connect to the specified library, read the table structure of the table to be recovered, and the corresponding Binlog log, in case the Binlog is in row format and DML records all the field values, the set and where field values are swapped in place, and the SQL that is stitched together is the rollback of SQL. InstallationUnzip B
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