Chinese: Document (foreign abbreviation:DOCFull foreign name: Document）YesComputer filescommonFile extensionIt is also a version of Word2003Text Document。sinceWord 2007Afterdocx。This format was originallyPlain text fileIt is often used in different operating systems, as well as the instructions for software and hardware.
. doc, yesComputer filescommonExtensionOne of.This format was originally used as a plain text file, which is often found in different operating systems, software and hardware instructions.By the 1990s,MicrosoftstayWord processing softwareMicrosoft OfficeIn Word,. doc is used as an extension and has become a popular format, while the plain text style of the former has almost disappeared.
Microsoft"Doc" format is a proprietary format of its own, and its files can accommodate more text formatsscripting language And recovery information, compared with other file formats such asRTF、HTMLThere is more waiting, but because this format is a closed formatcompatibilityIt is also low.
By default, Word documents edited with higher versions of Word software such as Word2016, Word2013, Word2010, and Word2007 will be saved in a different Docx format for each version.If Word2010 users often need to exchange Word documents with Word2003 users, and Word2003 users do not installFile format compatibility packageIf Docx documents cannot be opened directly, Word2010 users can set their default save format as Doc files.
The steps to set the default save format as a DOC file in Word2010 are as follows:
Step 2: Switch to "Save" in the open "Word Options" dialog boxtab , on“Save Document”Click the "Save file in this format" drop-down triangle button in the opendrop-down menu Select the Word97-2003 Document (*. doc) option and click OK.
Tip: Change the default saved Word2010file formatYou cannot change the format of a new Word document created using the right-click menu. The new Word document created using the right-click menu is still the sameDocx format.Only when you open the Word2010 document window, and then save it, you can save it as a Doc file by default.
In daily applications, users can set an open password and modify the password for the doc file. If no password is entered after the open password is entered, the file is read-only. The specific steps for setting a password for the doc file are described below.
[1]oneOpen the Save As dialog box, click the Office button, and in the pop-up menumouse pointer Move to Save As, and click Word Document in the pop-up menu as shown below.
Methods of Encrypting DOC Documents
twoOpen the "General Options" dialog box. In the pop-up "Save As" dialog box, click the lower triangle button on the right side of "Tools". Click the "General Options" command in the pop-up menu, as shown below.Opens the General Options dialog box.
Methods of Encrypting DOC Documents
threeSet password.After the "General Options" dialog box pops up, after "Password when opening file" and "Password when modifying file"Text BoxEnter the password, as shown below, and then click OK.
Method of Encrypting DOC Document
fourConfirm the password.After clicking OK, the Confirm Password dialog box pops up. Enter the password for modifying the file in the text box, and then click OK. The Confirm Password dialog box pops up again. Enter the password for opening the file in the text box, and then click OK. As shown below.
Method of Encrypting DOC Document
fiveEnter the password for opening the file.After saving the document and opening it again.The "Password" dialog box pops up. Enter the password set previously for opening the file in the text box, and then click the "OK" button, as shown below.
Method of Encrypting DOC Document
sixEnter the password for modifying the file.Click OK. The Password dialog box pops up again. Enter the previously set password to modify the file in the text box after Password. Then click OK. The document can be opened as shown below.
Methods of Encrypting DOC Documents
Document fee
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In foreign trade documents, (foreign language abbreviation:DOC. Full foreign name: Document charges)"File fee"Means.
Disk on chip
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The disk on the chip (foreign language abbreviation: DOC, foreign language full name: Disk On Chip) adopts NandFlashChip as basicStorage unit, plus some control chips, it is a modular and serialized electronic device operated by special software and hardwareStorage device。It uses TrueFFS (short for True Flash File System) hard diskSimulation technologyFlash can be simulated as a hard disk by managing Flash, which is easy to use and has a capacity of 288MB.It is precisely because TrueFFS technology is used to manage data read/write operations in Flash, which greatly increases the number of DOC write operations, far exceeds the write life of ordinary Flash, and improves the reliability of Flash.
4、 Support multiple operating systems（DOS、WINDOWS、QNX、VxWorks、Linux、pSOSEtc.)
Solution
Low power consumptionDiskOnChip2000 SeriesElectronic disk(hereinafter referred to as DOC2000)PC/104The embedded control system of the structure provides an ultra small, highly reliable, high-capacity, read-write solid state disk (SSD) chip.DOC2000 can be directly plugged into 32 pins on PC/104 series motherboardDIP(or standardIDE interface）On the socket, a standard DOS operable hard disk is provided at the BIOS levelFunctional simulation, no additional software is required to drive the chip, which is reflected in the common bootable hard disk, and the flash speed included in the chipfile systemDamaged withadjustment mechanism Increase the service life of the device, and the normal service life is more than 10 years.DOC2000 adopts Flash chip, which does not need battery power supply, so DOC2000 enables the system to work safely at the temperature andenvironment conditionNext.DOC2000 uses full electronic storage and addressing, while traditional hard disk andfloppy disk driveThe use of semi electronic and semi mechanical storage and addressing greatly improves the reliability and service life.In addition, the electronization also improves the impact on the power supply, which can be used in systems that frequently need to switch on and off.
Direct use under DOS and cooperation under LinuxDriveruse.
◆ Provide 8M to 288M solid state disk capacity on each socket
◆ BIOS level hard disk function simulation, operating like hard disk
◆ Built in flash file system, maintenance free
◆ FLASH technology, high-speed reading and writing, vibration resistance, power shock resistance
doc
◆ The motherboard needs a special DOC interfaceM-Systems' DiskOnChip2000 is a high-performance single chip flash disk packaged as standard 32 pin DIP. This unique data storage solution can provideCost effectivenessIts data storage mode is far better than the traditional hard disk.Especially suitable for applications with space constraints and capacity changes.DiskOnChip2000 can be easily installed onCPUOn the board, you will have a flash disk that can be activated immediately after installation.internetnetwork equipment 、Thin customerTerminal（Thin Clients）And embeddedmother boardThe best solution forDiskOnChip2000 has become an Internet device (such as set-top box,set-top-boxes）, thin client terminal (or thin terminal) and embeddedSingle board computerStandard flash disk module.DOM electronic disk, also known asDOM electronic hard disk，Disk On ModuleAbbreviation of.DOM electronic hard disk（FlashOnDisk)High efficiencyStabilityFastMemoryStorage mediaComponent, the most cost-effective memory storage media solution for time.The industrial control industry generally uses DOM electronic disk, DOC electronic disk, DOM electronic disk parameters and read/write speed for storage
6. Operating humidity: 5% to 95% non condensing (refer to the data of the manufacturer Shenzhen Anxinda Storage Technology Co., Ltd. for parameters, please contact for details)
In general, DOM is much more widely used than DOC, and its speed is several times faster than DOC,IDEInterface DOM ratioHDDIt's close,SATAType interface is much faster than HDD, andstorage space From several megabytes to 2, 4, 8, 16, 32G, etc., so eliminating DOC is likeUSB driveEliminating floppy drives is the same.However, many old devices or special devices based on DOC still use DOC in foreign countries. DOC has not been completely delisted, but devices supporting DOC are compatible with IDE SATAUSB interfaceMost devices that support DOM SATA do not support DOC.Please pay more attention when shopping.
DOC in shipping（DOCument of compliance）: Refers to the issuance of the【International Safety Management Rules】Documentary evidence of the company required.
The carrier of DOC can be divided into ceramic and metal. Generally, ceramic isCordieriteThere are many kinds of metals, such as iron, copperbrassEtc.The carrier is coated with precious metals, such as platinum, iridium, palladium, etc.And the precious metals on these coatings play a catalytic role.
Due to DOC and gasoline vehicle exhaustcatalytic converter OfOxidizabilitySame function, also used to reduce the gas stateCO、THCAnd in particulate matterSOFComposition
Light off temperatureCharacteristic testIt is to gradually increase the load at high and low speeds to improve the exhaust efficiencyBelow temperatureThis is to assess the DOC's light off characteristics within the low speed and high speed areas where the engine often works;
Conversion efficiency includesidlingAnd high and low speed conditions, each speed is constant, and each speed is measured by changing the engine loadOperating pointConversion efficiency.For DOC aging, high and low temperature cycling mode is adopted, that is, DOC lasts for 45 minutes at the bed temperature of 250 ℃;Continue 15 minutes at the bed temperature of 650 ℃, and run alternately until 100 hoursAging testend.
It is called DOC for short.Dissolved stateOrganic matterCarbon in.stayMarine chemistryIn general, it means that it can pass through a 0.45 micron filter membrane andAnalysis processOrganic carbon not lost by evaporation.It includes carbon in a part of colloidal organic matter not trapped by the filter membrane.It is used to indicate dissolved organic matter in seawater（DOM）OfTotal content。The average DOC is 50 ± 5% of the total DOM.It is generally expressed in milligram carbon/liter or ppmC.[2]
stayenvironmental scienceIn this field, DOC refers to the part of organic carbon that cannot be removed from water by specified filtration methods.
Soil dissolved organic carbon isPedosphereA very active chemicalmaterialIt has significant effects on the dissolution, adsorption, desorption, migration and toxicity of chemical substances in soil.
