Tag:signal

  • Crash tracking journey of IOS development (I)

    Time:2022-5-6

    Preface: Recently, I encountered a crash blood disaster caused by crash in daily development. In a release in early May, the crash rate of the app developed by the author was directly increased from one thousand to nearly two thousand. At that time, the project leader just needed to report the relevant situation of project […]

  • How does the nodejs process exit

    Time:2022-5-1

    There are several factors that can cause the nodejs process to exit. Some of these factors are preventable, such as the code throwing an exception; Some are not preventable, such as memory exhaustion.processThis global variable is an event emitter instance. If the process exits gracefully,processOne will be distributedexitevent. The application code can listen to this […]

  • Implement a UNIX shell by yourself

    Time:2022-4-22

    thisexperimentBy implementing a system that supports job controlUnix Shell, let’s be more familiar with process control and signal control. curriculumLabHas helped us buildShellAnd implemented the code that is not very relevant to this experiment. The core part needs to be completed by ourselves. Overall framework ShellInput from standard(stdin)Read the command entered by the user, and […]

  • Ruffian Heng embedded: starting octal flash with DQS on i.mxrt1170 does not strictly set dummy cycle (take mt35xu512 as an example)

    Time:2022-4-12

    Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isDQS signal on octal or hyper flash contacts dummy cycle。 There are four articles about how to set the correct value of cycle.dummy when starting cycle.dummy:Is25wp series dummy cycle setting、Is25lp series dummy cycle setting、Misunderstanding of setting dummy cycle to 0、Dummy […]

  • 1. Digital circuit concept

    Time:2022-4-11

    1、 What is a digital circuit In the world of circuit, signal transmission is divided into two kinds of signals, one is called analog signal and the other is called digital signal Analog signal: analog signal refers to the information expressed by continuously changing physical quantities. The amplitude and frequency of the signal change continuously […]

  • RAC finishing

    Time:2022-4-5

    RAC common methods, [email protected](self); @weakify(self); notice #The notification in RAC does not need to manually remove the observer. It has been implemented internally @weakify(self); [[[NSNotificationCenter defaultCenter] rac_addObserverForName:kNotificationName object:nil] subscribeNext:^(NSNotification * _Nullable x) { @strongify(self); }]; control #General method of control @weakify(self); [[button rac_signalForControlEvents:UIControlEventTouchUpOutside] subscribeNext:^(__kindof UIControl * _Nullable x) { @strongify(self); }]; #Listen for the uicontroleventeditingchanged […]

  • PCI time card (satellite time card) introduction to NTP network time card

    Time:2022-4-3

    PCI time card (satellite time card) introduction to NTP network time card PCI time card (satellite time card) introduction to NTP network time card Jingzhun electronic technology official wechat – ahjzsz 1、 Overview With the deepening of reform and opening up, China’s power system automation technology has developed rapidly. In order to achieve unified management […]

  • Poor iPhone signal? Three ways to say goodbye to carton

    Time:2022-3-22

    IPhone special poor signal? Recently many users have been asking us to make complaints about iPhone signals. To solve this problem, we have collected several methods that can effectively improve the signal problem provided by fruit powder in the forum. If you need it, you can try it and collect it when necessary! Open positioning […]

  • Whether the signal decomposition method similar to EMD is used for preprocessing before prediction has a problem in principle

    Time:2022-3-22

    Whether the signal decomposition method similar to EMD is used for preprocessing before prediction has a problem in principle Many scholars use various signal decomposition methods to decompose the signal and then predict the time series. The common methods areEMD(Empirical Mode Decomposition)AndITD (Intrinsic Time-Scale Decomposition)Wait.Question:However, recently, there are different opinions on whether there is information […]

  • GPS clock synchronization equipment (PTP clock system) helps Guangdong natural gas pipeline network company

    Time:2022-3-21

    GPS clock synchronization equipment (PTP clock system) helps Guangdong natural gas pipeline network company GPS clock synchronization equipment (PTP clock system) helps Guangdong natural gas pipeline network company Jingzhun Electronic TechnologyOfficial wechat – ahjzsz In late March 2021, the GPS clock synchronization equipment (PTP clock system) produced and developed by Jingzhun technology was successfully put […]

  • Source code analysis of QT signal slot (I)

    Time:2022-3-20

    Hello, I’m an it literary man, a front-line programmer from a large front-line factory When we use QT to develop programs, we all know how to use QT signal slot, but how does QT signal slot work? Most people still don’t know; Obviously, we don’t know how to use the deep-seated principle, but we don’t […]

  • Source code analysis of QT signal slot (II)

    Time:2022-3-17

    Hello, I’m an it literary man, a front-line programmer from a large front-line factory The previous video explained the basic concept of QT signal slot, meta object compiler, sample code and QT macro; Today, we will go into the second video of QT signal slot source code analysis series. Macro usage of QT signal slot […]