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How to release static electricity before contacting computer accessories?

Computer accessories are extremely sensitive to electrostatic discharge (ESD), and should release the static electricity before contacting with the hand. You'd better wash your hands in advance and dry them with cotton cloth. The operation of the first contact with a hand computer chassis bare metal surface, and then use the other hand and computer accessories electrostatic protective bag contact, at least two seconds to keep the static electricity as

Mac OS X Mavericks GM u disk Production tutorial

successfully. Cannot find please mount with command Sh-3.2#hdiutil Mount-plist-noverify-noautofsck-nobrowse/volumes/os X Install esd/basesystem.dmg 5. Next Open "Disk Utility", restore BASESYSTEM.DMG to the USB flash drive (This step is similar to the previous method, just "source disk" Be sure to select BASESYSTEM.DMG, target disk or USB drive. 6. After the recovery is complete, open the USB drive directory (the default name is ' OS X Base

Spring MVC adds database data and obtains the data ID just generated

Tags: last rate key RAM App Mapper use entity class intoMapper.xml fileSELECT last_insert_id () as SdidINSERT into ESD (AH,SDID,SDWJ) VALUES (#{ah},#{sdid},#{sdwj}Spring MVC adds database data and obtains the data ID just generated

Android Source directory structure detailed

)| |--searchabledictionary (Directory search)| |--simplejni (JNI routines)| |--skeletonapp (empty shell app)| |--Snake (Snake program)| |--softkeyboard (soft keyboard)| |--Wiktionary (? Wikipedia| '--wiktionarysimple (? Wiki routines)|--Scripts (script)|--SDK (SDK Configuration)|--Simulator (? Simulator)|--Testrunner (? For testing)'--tools (some tool)External directory.|--AES (AES encryption)|--apache-http (Web server)|--Astl (Astl (Android STL) is a slimmed-down version of the regular C + + ST

How to Implement LAN switch control

' requirements for multiple switching ports. 1.1 circuit performance requirements High-Speed PCB boards of switches have high requirements on EMC and ESD. It uses a high-speed clock of 75 MHz and 50 MHz. The accuracy of the crystal oscillator must be smaller than 50 ppm, and the clock must be sent to different chips through the clock distribution circuit, the phase difference between the clock to be allocated is less than 2ns. A lan switch has 24 10/1

Decryption of mobile phone production process

silicone three-part, and some buttons between the key cap assembly and the bracket with a light-shielding paper to prevent light transmission between the keys. Stent material according to the key thickness, can be used PC or ABS injection molding, thickness in 0.8-2.0mm; You can also use PC sheet directly blanking, thickness of 0.5, 0.6 or 0.7mm; When the key thickness is not enough, the bracket material with 0.15mm thick stainless steel sheet, but considering the

Recom first two-wire loop-powered signal Conditioning module supporting Hart protocol

Product Features:Output Loop PowerSupport for Hart Protocol communicationHigh accuracy grade (0.1% F.s.)High isolation (input, output both ends 2kvac/1ma)Small Volume: SIP9 package (26*9.5*12.5mm)Low Temperature drift: 50ppm/℃Operating Temperature range: -40℃~85℃High ESD protection class (bare metal ±4KV)Following the release of the industry's first support for two-wire loop-powered signal conditioning module T_LF, recom then launched its upgraded pro

Linux temporary file cleanup

files/tmp/orbit-yyc/linc-7e9-0-56828c5c66be1 Removing files/tmp/orbit-yyc/linc-815-0-1e0f6f36a2ee3 Removing file/tmp/orbit-yyc/bonobo-activation-server-ior Removing files/tmp/orbit-yyc/linc-850-0-5c3b9d5470bfc Removing files/tmp/orbit-yyc/linc-803-0-5ee49981d2cee Removing files/tmp/orbit-yyc/linc-852-0-5c3b9d54bcd06 Removing files/tmp/orbit-yyc/linc-83e-0-716284b294fae Removing files/tmp/orbit-yyc/linc-856-0-5c3b9d547287e Removing files/tmp/orbit-yyc/linc-81d-0-1e0f6f36e88f7 Removing files/tmp/

How to install ext for eclipse plug-in

1. Create an eclipse environment (based on the current environment settings of the project team)Second: Download jsEclipse: http://trials.adobe.com/pub/esd/labs/jseclipse/jseclipse_plugin_040207.zipThird, the configuration file association method is window-preference --- general-editors: file association. Find *. js and set jseclipse to default.Fourth: open any js file (in order to display the JSEclipse menu), under the JSEclipse menu, select Add Libr

Influence of electromagnetic interference on structured cabling systems

compatibility Standard Series Part 2: electrostatic discharge (ESD) Immunity Test Part 3: test the immunity of the radiation field Part 4: electrical fast transient pulse group (EFT)/burst immunity test Part 5: Electrical disturbance resistance test Part 6: conductive field immunity test Part 8: electrical frequency magnetic field immunity test The most common LAN hardware and structured cabling radiation and disturbance resistance standards are EN 5

Ubuntu8.04 (LTS) offline upgrade package User Guide

Ubuntu8.04LTS's offline upgrade package makes it easy for friends who cannot access the Internet. Usage: language-pack-gnome-zh-baselanguage-pack-gnome- The offline upgrade package of Ubuntu 8.04 LTS makes it easy for friends who cannot access the Internet. The following is a list of specific software packages (server software package, applicable to friends who are studying server settings ). Base.tar:Language-pack-gnome-zh-base language-pack-gnome-zh language-pack-zh-base language-support-fonts

Implement a thread library on Linux

. The operating system allocates resources among all processes. To prevent a process from modifying the resources of other processes, processes are completely independent of each other. However, it is also common that multiple processes work together to complete a task. For example, it shows the processes that are simultaneously executed in my Linux system. Four of them are executing mozilla-bin. In this case, processes need to communicate with each other. Therefore, the operating system provide

msm8916 LCD related Tuning Pilot guide

. Front Porch,vsync Pulse Width,vert. Back Porch,vert. Front PorchCopy the values below to fill in the above array.2. DSI PHY RegistersPHY Registersvalue in hexdsiphy_timing_ctrl_0#value!dsiphy_timing_ctrl_11adsiphy_timing_ctrl_212Dsiphy_timing_ctrl_3 0dsiphy_timing_ctrl_440dsiphy_timing_ctrl_542dsiphy_timing_ctrl_616dsiphy_timing_ctrl_71edsiphy_timing_ctrl_814dsiphy_timing_ctrl_93dsiphy_timing_ctrl_104Esd:Qcom,mdss-dsi-panel-status-command = [06 01 00 01 05 00 02 09 08];Qcom,mdss-dsi-panel-stat

Basic knowledge of lithium battery Protection Board (RPM)

protective device for lithium-ion batteries, the protection plate can work reliably within the normal operating current range of the equipment, and can act quickly when the battery is accidentally shorted or overcurrent, so that the core is protected.5, mechanical properties, temperature adaptability, antistatic abilityThe protection plate must be able to pass the national standard Vibration, the impact test; the protection plate can work safely in the 40-85 ℃ and can withstand the non-contact

Inghua Ethernet Media switch provides long transmission distance

Yan Hua technology recently launched the latest Ethernet Media switch product ADAM-6521S. A ADAM-6521S with a Single-Mode Optical Fiber port can be used as an industrial converter with a maximum transmission distance of 15 km. You can also use four industrial 10/100 Mbps Ethernet ports as a switch.Like other modules in the ADAM series, ADAM-6521S can be installed in three ways: DIN rail installation, wall mounting, panel installation or stacked installation. The ADAM-6521S terminal block support

Android system)

developers to learn and develop Android programs and can be used as templates. the external directory is displayed in the following directory: external/ | -- AES | -- APACHE-HTTP | -- bluez | -- clearsilver | -- keystore | -- dhcpcd | -- dropbear | -- elfcopy | -- elfutils | -- Emma | -- ESD | -- expat | -- fdlibm | -- FreeType | -- gdata | -- giflib | -- googleclient | -- icu4c | -- iptables | -- jdiff | -- jhead | -- JPEG |

SAP technology Overview (III)

operation. Each Bo is implemented by a business object provider class, which implements a set of generic interfaces. The attirbute type of Bo must be global data types (gdt) Global Data Type To unify the definition of the service interface, you must unify the data type. Business Process: LDU (logical Deployment Unit) A ldu is composed of a set of semantic-related componenet. To make it simple to activate/deactive a service function. s Process agent: Provides message-based LDU communication

Mac: Create an OS X 10.8.

file. The current version is "Install Mac OS X mountain lion preview 1" Right-click the file and select "show Package content" Open the contents directory, open the sharedsupport directory, and find the "installesd. DMG" file, for example: Double-click the "installesd. DMG" file and extract it to a drive letter similar to a temporary image on the desktop, for example: Next, prepare a USB flash drive and start making the drive.At present, it is recommended that the size of the USB flash drive

Maxcompute pin chart and RS232 pin Definition

channel. TTL/CMOS Data from T1IN, T2IN input into RS-232 data from T1OUT, T2OUT to the computer DP9 plug; the RS-232 data of DP9 plug is output from R1IN, R2IN input to TTL/CMOS Data and then from R1OUT, R2OUT. The third part is power supply. 15 DNG and 16 VCC (+ 5 v ). See the following figure. Maxcompute pin chart General description: maxcompute is a dual-channel TTL level to RS232 level converter, commonly used in the serial port connection of electronic devices. To put it bluntly, the 5 v t

Design of High-Precision Water Level Monitor Based on Single Chip Microcomputer

connected with hardware. The registers and latches inside the chip all have strict timing requirements, therefore, it fully reflects the importance of combining software and hardware in the development process. Data transmission errors caused by timing problems were also encountered during the program design process, but they were finally solved smoothly. 2.5Design of serial communication circuit In this design, the lower computer and the upper computer communication serial port part we adopt t

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