Unit10TheApplicationsofComputers網絡實用知識(一)——專業網站介紹

Forthemostpart,humanbeingscandowhatevercomputerscando,butcomputerscandoitwithmuchgreaterspeedandaccuracy.Thisisinspiteofthefactthatcomputersperformalltheircalculationsandoperationsonestepatatime.Acomputerisfasterandmoreaccuratethanpeople,butunlikemostpeopleithastobegivenacompletesetofinstructionsthattellitexactlywhattodoateachstepofitsoperation.Thissetofinstructions,calledaprogram,ispreparedbyoneormorepersonsforeachjobthecomputeristodo.

Theseprogramsareplacedinthecomputer’smemoryunitinbinary-codedform,witheachinstructionhavingauniquecode.Thecomputertakestheseinstructioncodesfrommemoryoneatatimeandperformstheoperationcalledforbythecode.

Computershavefoundtheirwayintomanyapplicationareasthatwereoncenotfeasible,andtherapidincreaseinthenumberandvarietyofcomputerapplicationshasmadethemasignificantpartofourlives.

ScientificCalculationsTheearliestcomputerswerecreatedtotakethejobofscientificcalculationswhichinvolvedcomplexanddifficultmathematicsortime-consumingtediousandrepetitive,numericalcalculations.

DataProcessingComputershavebeenwidelyusedindataprocessing,forexample,accounting,statistics,andcensus.Theoperationsinvolvedareverysimple—addition,subtraction,multiplicationanddivision,buttheamountofdataisoverwhelming,beyondhumancapabilityandpatience.Withdatabasesoftwareequipped,thecomputercanhandledatatothesatisfactionoftheuser.

ComputerSimulationComputersimulatingonasapowerfulanalytictoolwidelyusedinscientificresearchandengineeringdesigndemonstratesunrivalledadvantages.Withcomputersimulation,scientistsandengineersdonothavetobuildrealhardwaremodelsorprimaryprototypeswhentheyobserveanunknownphenomenon,analyzeacomplexprocess,designamachineorabuilding.Computersimulationisparticularlysignificantwhentheobjectunderstudyandexaminationiscostlyoritisimpossibletobuilditintoarealmodel.

Manycomputersimulationsystemshavebeendevelopedandprovedtobecost-effective,becauseusingcomputersimulationprograms,engineerscanaccomplishiterativeprocesseachtimebyinputtingdifferentschemesandparametersintotheircomputermodelsratherthanbuildingmanydifferentrealmodels.

ManagementManagementisoneofthedecisivefactorsthattellsuccessorfailureofanybank,corporation,firm,university,researchinstituteincompetition.Managementisacomprehensivetechnique,involvingeveryaspectoftheunit—task(products,inventions,creations,patents),personnel(administrators,clerks,technicians,servants),finance,realestate,equipment,etc.Computerizedmanagementissoftwaredesignedtoprovidetoolsformanagementinanyprofession,forexample,regulationofpersonnel,accounting,sales,inventory,taxation,wages,etc.

Everykindofsoftwareembodiestheup-to-datetheoryandmethodinitsprofession,andisrathereasytolearn.Moreandmoremanagementsoftwareproductsemerge,takingtheplaceofhumanmanagers.

網絡實用知識(一)

——專業網站介紹

信息時代是資源共享的時代，學會從網絡上獲取信息也是技術人員必備的一項專業技能。因此，要求在學會進行信息檢索的同時，了解一些專業網站的情況，這樣可以有針對性地、更安全可靠地獲取準確的技術資料。

1．/華軍軟件園

(1)主要欄目：系統工具，網絡工具，安全工具，媒體工具，圖文處理，桌面工具，管理軟件，教育教學，游戲娛樂，數碼軟件，外語學習，電腦技巧。

(2)主要特點：該網站可以免費下載各類實用軟件，安全可靠。

(3)相關網站：

/index.html天空軟件站

/default.html霏凡軟件站

2．/flwz/website/electron.htm電子網址大全

(1)主要欄目：電子元件，集成電路，無線技術，電子通信等近70個電子欄目。

(2)主要特點：涵蓋了各類電子領域網址和電子類公司的信息資料。

(3)相關網站：

/搜電子網址

/dianzi/7788搜索網

3．/21IC搜索

(1)主要欄目：芯片資料，貨源搜索，參考價格。

(2)主要特點：包括各種芯片資料的特點、參數；芯片管腳圖與應用電路等。

(3)相關網站：

/電子元器件資料查詢網

/dianzi/7788搜索網(含電子元器件、集成電路查詢)

4．/index.htm電子之城

(1)主要欄目：各網站論壇，百G教程中心，共享版軟件，教程和文摘，電子學入門，PROTEL入門，電子小制作，常用的資料，單片機入門，單片機資料，IC資料中心，綜合寶典書，制作5000例。

(2)主要特色：該網站給電子愛好者提供了大量有用的信息和免費的