spectrum problems

DDR1 clock problems, DDR1 clock Problems I encountered a problem recently. I had a hard time tossing for a week and had a special crash! When the board is powered on, when reading data from Flash, sometimes an error occurs when writing data to DDR. For occasional errors, it is difficult to use reveal to locate the error online, and the location of each error is not the same. Today, the hardware engineer t

Summary of some problems when the set stores URLs and URL Problems Let's take a look at the question first: package com.lk.C;import java.net.MalformedURLException;import java.net.URL;import java.util.HashSet;import java.util.Set;public class Test3 { private static final String [] URLNAMES = { "http://www.sina.com",//202.108.33.94 "http://www.nuw.edu.cn",//124.115.173.252 "http://java

FPGA timing problems and fpga timing problems Recently I made a project ------ 4 1080 p (1920x1080) to synthesize a 4 K (3840x2160,297 M) interface board. When 1080 p goes in and p goes out, the video is played normally. However, when P and 4 K are in progress, the video image will have water ripple. At that time, it was assumed that the timing sequence sent by FPGA to the downstream device SII9136 could no

. Creates a picture object, first looking for the object in the cache, and then fetching the object directly, No, the image resource is found from the bundle, and the object is created and returned. There are no picture resources in the bundle, then nil is returned. Objects created by Imagewithcontentsoffile:magewithcontentsoffile are not cached in system memory. The advantage is that the cache is not generated. Cons: Frequent use of s

Xiao Kee 1. About the initialization of fragmentWhen we set up the interface using the avtivity+fragment combination, we usually have new fragment in the activity, but when we need to pass the parameters in fragment, Are we going to have a problem with the way we use the constructor in the fragment? Yes, we are using the method of construction in the Androidstudio parameter, will be error, simply said: "Fragment in the way the parameter assignment can cause a memory leak problem", the code

/topics/ui/actionbar.html. So you can see that this project is intended to be compatible with the SDK for the lower version number.Workaround:Method one, because this project is to be compatible with the low version of the SDK generated, it is only necessary to create a new project when the minimum version number is selected as Android4.0.Method Two, not in the ADT update to the 22.6.x version number appears after the code, 22.3.x before the version number will not have, good then discard the ne

The simplest practice of area problems and the practice of area Problems1. Calculate the area of the following figure enclosed. The area calculation method is to count the number of horizontal and vertical line intersections in the closed curve enclosed. As shown in, in the two-dimensional array of 10*10, "*" contains 15 points, so the area is 15.[Example input]Area. in0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 00 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 00 0 0 0

EditPlus open PHP file or HTML file, save, select the encoding, if the database and page encoding is GBK, then the code here choose ANSI; If the database and page encoding is Utf-8, The Utf-8 is also chosen here. 4, also note that the data passed in JavaScript or flash is UTF-8 encoded, if the database and page encoding is GBK, to transcode, and then write to the database. iconv (' utf-8 ', ' GBK ', $content); 5, in the PHP program, you can add a line to specify the code of the PHP source

Timestamp and character set encoding problems $ time = time (); $ unixtime = date ( quot; Y-m-dH: I: s quot ;, $ time); this gets the server time... I am using a foreign server .. how can I change the above two sentences to adjust the time ?? Another question is about timestamp and character set encoding. $ Time = time (); $ Unixtime = date ("Y-m-d H: I: s", $ time ); This gets the server time... the foreign server is used now... how can I change

Change to a single record of historical data: Common Database Design (2) -- change to a single record of historical data problems 1. Overview There is a type of data stored in the historical customer operation data, such as the bidding documents, the refining scheme list, the price change of the product price, and the change list. Such historical data includes a mainstream water meter that controls the flow version and a list table corresponding to

Common js problems and common js ProblemsJavaScript match () methodDefinition and usageThe match () method can be used to search for a specified value in a string or to find a match between one or more regular expressions.This method is similar to indexOf () and lastIndexOf (), but it returns the specified value rather than the position of the string.Syntax// Match the string and return the specified valueStringObject. match (searchvalue)// Matches th

. Net program memory usage Problems 1. Use the Performance Testing Tool dottrace 3.0 to calculate that the code in your program occupies a large amount of memory. 2. Forced garbage collection 3. Multiple dispose and close 4. Call timer every several seconds: setprocessworkingsetsize (process. getcurrentprocess (). Handle,-1,-1). For details, see the appendix. 5. Select release for release. 6. Note that less garbage is generated during code writing. Fo

Problems encountered during ecere Compilation First download to the latest source code in https://nodeload.github.com/ecere/sdk/tarball/master After decompression, make Shown as follows: Bootstrapping EC compiling tools... building ecere... building EC... building ECP... building ecc... building ECs... all done! Building dependencies... building libungif... building 2nd stage ecere... src/sys/eararchive. EC: 4: 18: Fatal error: zlib. h:

(finished [barber_number]); // wait until the haircut ends.Pay (); // paymentSignal (payment); // paymentWait (receipt); // wait for the receiptGet_up_barberchair (); // leave the chairSignal (leave_barberchair); // sends the exit SignalExit_shop (); // leave the barber shop}Void Barber (int I){While (true){Wait (mutex1 );Enqueue (I); // Add the number of the barber to the queueSignal (mutex1 );Wait (customer_ready); // wait for the customer to prepareWait (mutex );Cut_hair (); // haircutSignal

[Original] troubleshooting of small program common problems and small program Common ProblemsDirectory (updated to 201701130) FAQs How to Adapt pages How to correctly use the image Tag How to disable page sliding Local resources cannot be obtained through WXSS. How can this problem be solved? How to skip a Applet Restriction on the wxss-Selector How to wrap a br label without html Scroll-view tag bug How to simulate the hover eff

When buying things in a supermarket, you often encounter payment and money-seeking problems. In general, the nominal value of our currency is also 100, 50, 20, 10, 5, 1, 0.5, 0.1, which are basically multiples of 1 or 5. Q: How many bills do I have to pay at least? This problem is relatively easy, as long as the payment from large to small. In addition, the number of banknotes that can be changed is also counted in the total number of banknotes, which

NYOJ wiring problems and nyoj wiring problemsWiring Problem time limit: 1000 MS | memory limit: 65535 KB difficulty: 4 Description Nanyang institute of technology needs to transform the power line. The principal now asks the designer to design a wiring method which must meet the following requirements: 1. Power up all the buildings. 2. Minimum Cost of wires used Input The first line is an integer n, indicat

Win7 iis7 ASP. NET mvc3.0 deployment problems 1. ApplicationProgramThe pool adopts the Classic mode, framework4.0. There may be permission issues. Solution: Set the identifier of the advanced settings to LocalSystem. Generally, MVC adopts the integration mode. Why should I select the Classic mode? Because you need to identify the httpmodules configuration. 2. Open the handler ing settings of IIS, and "add wildcard script ing" Request Path :*

[Html] button problems, button ProblemsProblem: When the type attribute is not set, the button does not work in different browsers. For example: Html: Result. php: We found that the form can be submitted normally if you click ie8 or later, but under ie6 or ie7, the button does not respond.Cause: Why is there a difference? Because the type attribute is not set for the button, the type of the button to be parsed in different browsers is different. Thr

Typical java problems !!!, Typical java ProblemsQuestion 1: = what is the difference with equal? = And equals are both compared, while the former is an operator, while the latter is a method. The basic data type and reference data type can both use the operator =, equals can be used only for reference data. The following describes the usage and differences of the two.= The operator is used to compare whether the values of two variables are equal, that