grc meaning

how do you differentiate between sending and receiving? By default, the DCE sends data to the DTE, and when DTE decides to send data to DCE, the RTS is valid, indicating that the DTE expects to be sent to the DCE, and that the DCE cannot immediately convert the send and receive status, and DTE can determine if the CTS is valid to see if it can be sent. This avoids the loss of data caused by the DTE being sent when the DCE is not ready. Full double working hours, these two signals have been vali

On the physical meaning of negative frequency in spectrum --Reading analysis * Statement: This article is a large number of references to Chen Hui deep, Fang Haiyan of the relevant paper content* This article is the best I've ever read to explain the negative frequency of the spectrum, just to pay tribute to the two authors in this blog post. Absrtact: This paper discusses the physical

, no basketball awareness, no team sense, I played the position is the defender, and this person really difficult to cooperate, and with the team members of the same without teamwork consciousness, which once made me very tangled , the result is that I am floating in an outside line, become a useless person. And then this guy can not see the past, said I do not play, people are lazy, Daladala, well, I did not explain, I admit very lazy, for a programmer, let's say that is his praise to me.By thi

The meaning and relationship of nal, slice and frame in H.NAL Nal_unit_type 1 (encoding strip for non-IDR images), 2 (coded stripe data split block a), 3 (coded stripe data split block B), 4 (coded stripe data block C), 5 (encoded stripe of IDR image) typesAndThree coding modes for slice species: I_slice, P_slice, B_sliceThere are 3 types of frame: what is the mapping between I-frame, P-frame, and B-frame?Finally, what frame does the 6 (SEI), 7 (SPS),

working directory, and the role of her and the built-in command pwd is the same.# echo ~+/var/log~-Last working directoryThis symbol represents the last working directory.# echo ~-/etc/httpd/logs; Semicolon (Command separator)In the shell, the symbol that functions as a "continuous instruction" is the semicolon. such as the following exampleCD ~/backup; mkdir startup; CP ~/.* startup/.;; Continuous semicolon (Terminator)Dedicated in case options, assume the role of Terminator.Case ' $fop ' inHe

In Java programming, we often use the System.out.println () method to output a string, and perhaps we have already guessed that println () is the method name, but what is the system and what is out?This involves the use of a static keyword. For example, the system is actually a class within the Java.lang.And out is a data member (also known as a field) inside the system, but this member is not the basic class, but the object of the Java.io.PrintStream class, and the Java.io.PrintStream class has

previous sibling node is previoussibling indicates what the next sibling node is nextsilbing Gets the value of the element property getattribute Sets the value of the element property SetattribiteIndicates that the replication node clonechild represents the deletion of child nodes removechlidInsert the NewNode node in front of TargetNode with what is represented InsertBeforeThe difference between childnodes and childrenChildNodes gets the element in the child node, the text, the comment node

1. Tdscdma_op_plmn_list4,100,240,0,100,240,32,100,240,112,100,240,128, change to 16 binary Yes0x03 0x64 0xf0 0x00 0x64 0xf0 0x20 0x64 0xf0 0x70 0x64 0xf0 0x80Reference: Http://www.cnblogs.com/bastard/archive/2013/05/09/3068602.html, which mentions 0x03 0x64 0xf0 0x00 0x64 0xf0 0x20 0x64 0xf0 0x70 (46000, 46002, 46007)Then the whole representation: 4 items, respectively 46000, 46002, 46007, 46008Nv65602:location–/nv/item_files/modem/nas/ehplmnDefault value–0x03 0x64 0xf0 0x00 0x64 0xf0 0x20 0x64

Interpolator is used to modify the animation effect, define the rate of change of the animation, can make the existing animation effect accelerated (acceleration), decelerated (deceleration), repeated (repetition), bounced (bounce) and so on.The contents of the document in Android are as follows:Acceleratedecelerateinterpolator rate changes at the beginning and end of the animation are slower, accelerating in the middleAccelerateinterpolator at the beginning of the animation the rate change is s

-party table and placed in the Student table. Course Abandon Maintenance*/@ManyToManyPrivatesetNewHashset(); @ManyToOnePrivateTeacher Teacher; @Entity @table (name = "T_course" ) Span style= "color: #0000ff;" >public class Course {@Id @GeneratedValu E private Integer ID; private String Coursedesc; // course description private String Courseno; // course code // course abandons the maintenance foreign key. @ManyToMany (mappedby= "courses" ) setnew hashset@Entity @table

Assign: Simple assignment, not changing index count-(void) Setmyobject: (ID) newvalue{_myobject=NewValue;} Copy: Create an object with an index count of 1 and then release the old object-(void) Setmyobject: (ID) newvalue{if(_myobject! =newvalue) {[_myobject release]; _myobject=[newvalue Copy]; }retain: Frees the old object, assigns the value of the old object to the input object, and then increases the index count of the input object to 1-(void) Setmyobject: (ID) newvalue{if(_myobject! =

Values begin with a # sign.The first 2 digits represent the transparency of the color, 00~FF, 00 indicates that the color is completely transparent, and FF indicates that the color is completely opaque.The latter 6 digits represent the RGB value of the color. such as: 000000 for Black, ffffff for white, ff0000 for red, 00ff00 for Green, 0000ff for blue, ffff00 for yellow.The following is an example of the background color of the slide-by menu (set to yellow here), which describes transparency.1

android:drawable attribute in the color_selector.xml above, Know that Android should be based on the folder to determine, in the Color folder file has the Android:color property, the file under the Drawable folder has the Android:drawable propertyIt is also important to note that the files referenced by the TextColor and background properties cannot be referenced in a random way, such as textcolor references Drawable_selector.xml,background references Color_ Selector.xml will make an error. So

index count of the input object to 1Use assign: for underlying data types (nsinteger,cgfloat) and C data types (int, float, double, char, and so on)Using copy: On NSStringUse retain: For other nsobject and its subclassesNonatomic, non-atomic access, no synchronization, multi-threaded concurrent access improves performance. Note that if you do not add this property, the default is two access methods are atomic transaction access@property (nonatomic, retain) Uitextfield *username automatically ge

contribution of different factors to a phenomenon is the so-called detailed analysis model. A lot of things that we seem to be unchanged, in fact, the internal composition of the proportion of the great changes have taken place. And some seemingly changing things, the relative relationship in fact there is no change, but a simple number of fluctuations. 　　 The website says average daily IP/PV visit volume is about 600/2400 means, today visit first page number is 2,400 times, Access IP is 600. T

Class A, and another class B inherits Class A. The following code is available:A = new B (); This is called the parent class's reference A to the subclass object, new B ();If your A is an interface, or an abstract class, then it is not possible to create an object, so that writing can also be used to refer to his subclass or to the object that implements the class. It's not obvious that this sentence is written here. In fact, it is mainly used in the parameters of the method, that is, polymorphi

]= This. Embeddedvalueresolver.resolvestringvalue (Patterns[i]); } returnResolvedpatterns; } } The spring code is not very obscure, interested in child shoes research propertyplaceholderconfigurer (and if it does not find the XXX key defined in ${xxx}, it will also go to the JVM System Properties (System.getproperty () ) and Environment variables (system.getenv ()).Summarize:XML file, if ${} is used, the work of parsing depends on the third-party jar;

object visible content, excluding the scroll bar, excluding the border;10. ClientHeight: Gets the height of the object's visible content, excluding the scroll bar, not including the border;11. ClientLeft: Gets the border width of the object12. ClientTop: Gets the border height of the object13, OffsetParent: The parent Layer object of the current object.IE6.0, ff1.06+:clientwidth = width + paddingclientheight = height + paddingoffsetwidth = width + padding + borderoffsetheight = height + padding

Linux shell status test expression meaning file test-d directory-s file length is greater than 0, non-empty-f Regular file-w writable-L symbol connection-u file has s u I d bit set-r readable-x executable-nt to test whether file1 is updated than file2. The modification date will be used for this comparison with the next comparison. -Ot test whether file1 is older than file2. -Ef tests whether file1 is a hard link to file2. Numerical Test-the eq value

Meaning of linux folders (the most complete version)/bin: where binary programs live. /boot: the special programs that start the system when you turn the machine on. /dev: aaaaaalll the "device" listings for hardware of every concievable flavor, along with some "imaginary" devices, lile/dev/null and/dev/zero. when you get a random number it usually comes from/dev/random. /etc: configuration files. /home: the user's directories Live here. /lib: the lib