10m transceiver

changing as each symbol changes. EVM is also very important for the performance of WCDMA transmitter, because it indicates the modulation quality of the transmitting signal. A large EVM value will result in poor detection accuracy, thus reducing the performance of the transceiver. Frequency error: The difference between the specified carrier frequency and the actual carrier frequency. Due to the adjacent channel interference and low quality detecti

" java.lang.OutOfMemoryError:unable to create new native threadThree, method area overflow A method area overflow is caused when the run-time pool is too large or too many classes.import Java.util.arraylist;import java.util.List;/** * VM args:-xx:permsize=10m-xx:maxpermsize=10m * @author*/ Public classRuntimeconstantpooloom { Public Static voidMain (string[] args) {//use list to keep constant pool reference

overflow:The run-time allocation is within the method area and can limit the size of the method area through-xx:permsize and-xx:maxpermsize, thereby indirectly limiting the capacity of the constant pool. The experiment code failed on the JDK 1.7.0_72./***-xx:permsize=10m-xx:maxpermsize=10m *@authorAdministrator **/ Public classRuntimeconstantpooloom { Public Static voidMain (string[] args) {ListNewArraylis

In a computer, using a float or double to store decimals is not an exact value. If you want to get accurate results, it's best to use fractional notation to represent decimals. Finite decimals or infinite loop decimals can be converted to fractions. Like what:0.9 = 9/100.333 (3) = 1/3 (the number in parentheses indicates a circular section)Of course, a decimal number can be expressed in several different fractional forms. Such as:0.333 (3) = 1/3 = 3/9Given a finite decimal or infinite loop decim

difference between the two modules is the limit on the number of connections over time, which is the limit on the number of connections at the same timeHttplimitreqmodul limit the number of instances of the same IP access over a period of timeHTTP {.....#定义一个名为allips的limit_req_zone用来存储session, the size is 10M of memory,#以 $binary _remote_addr as key, limiting the average request per second to 1,#1M能存储16000个状态, the value of Rete must be an integer,#如果

. Command function:Displays information about the processes currently being executed by the system, including process IDs, memory usage, CPU utilization, etc.3. Command parameters:-B Batch Processing-C Displays the complete ruling command-I ignores the failure process-S Secret mode-S cumulative mode-i-u-p-n4. Usage examples:Example 1: Displaying process informationCommand:TopOutput:[email protected] log]# toptop-14:06:23 up to Days, 16:44, 2 users, load average:1.25, 1.32, 1.35Tasks:206 Total, 1

wait_timeout (show Status to see this setting), there may be a problem. The simplest way is to change the wait_timeout, of course, you can also in the program occasionally mysql_ping (), so that MySQL knows it is not a person in the fight. troubleshoot MySQL server has gone away 1, applications (such as PHP) for a long time to execute the batch of MySQL statements. The most common is acquisition or new and old data conversion.Solution:Add or modify the following two variables in the my.cnf fi

The principle of backing up a control file is to back up the control file after the physical structure of the database has changed. 1. Trace: Used to control file rebuilding (generated trace file in Udump) sql> ALTER DATABASE backup Controlfile to trace; Database altered. The following is a backup of the control file: CREATE controlfile Reuse DATABASE "LX01" Noresetlogs Archivelog Maxlogfiles 16 Maxlogmembers 3 Maxdatafiles 100 Maxinstances 1 Maxloghistory 292 LOGFILE GROUP 1 ( '/di

routers on this side of the WAN port are plugged in, but not connected to the modem, LAN access is not connected to the wall modules. 2, network cable connectivity failure, mainly the quality of the network cable is poor, or the line sequence is not correct. Modem access to the router, usually the modem distance from the router is not far, as long as the line sequence is no problem, is very bad network cable can be normal connection. For LAN access to the broadband, it should be noted that if

method that returns a reference to the string in the constant pool if the run-time pool already contains a string equal to the contents of this string object, and if not, creates the same string as the string content in the constant pool and returns a reference to the string created in the constant pool. The implementation of the JDK7 intern () method is different, when the string is not created in the constant pool, instead of creating the same string as this string content in the constant poo

packet from the ge-2/3/0 port; the RT2 ge-1/1/11 port transceiver counter unchanged, indicating that the RT4 ping package does not reach RT2. RT4: Interface ge-2/3/0 Input packets: 25 Output packets: 8246 RT2: Disp int gi 1/1/11 Input: 0 bytes, 0 packets Output: 1536 bytes, 24 packets Case 2: Only one Pigtails are required to be connected, that is, RT4 sends the pigtails in the RT2 receiving direction; RT2 ge-1/1/11 port up, RT4 ge-2/3/0 port down,

, in fact, the two kinds of RJ-45 port is completely the same as the port itself, however, the network circuit structure corresponding to the port is different, so it cannot be connected at will.2. the AUI port is the LAN interface used to connect to the coarse coaxial cable. It is a D-type 15-pin LAN interface, this is one of the most common ports in the ring or bus network. The router can connect to the 10Base-5 network through the coarse coaxial cable tra