describe parallel and serial data transmission
KỸ THUẬT VIỄN THÔNG - Chương 6: Truyền dữ liệu tương tự và dữ liệu số (Analog and digital data transmission) pps
Ngày tải lên :
10/07/2014, 17:20
... xuất sớm theo dạng mã Morse Ngày nay, loại mã sử dụng rộng rãi phổ biến giới mã ASCII (American Standard Code for Information Interchange) tổ chức ANSI công bố thức Với mã ASCII, ký tự đuwocj biểu...
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Tài liệu Chapter 9 Using Telephone and Cable Networks for Data Transmission pptx
Ngày tải lên :
16/02/2014, 20:20
... discussed in this section: Bandwidth Sharing CM and CMTS Data Transmission Schemes: DOCSIS 9.30 Figure 9.16 Division of coaxial cable band by CATV 9.31 Note Downstream data are modulated using the ... Standards 9.10 Figure 9.6 Telephone line bandwidth 9.11 Note Modem stands for modulator/demodulator 9.12 Figure 9.7 Modulation/demodulation 9.13 Figure 9.8 The V.32 and V.32bis constellation and ... Note The tasks of data transfer and signaling are separated in modern telephone networks: data transfer is done by one network, signaling by another 9.7 Figure 9.4 Data transfer and signaling networks...
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Báo cáo hóa học: " Research Article Real-Time Transmission and Storage of Video, Audio, and Health Data in Emergency and Home Care Situations" pdf
Ngày tải lên :
22/06/2014, 19:20
... using both Bluetooth and RS232 serial ports In order to allow realtime interaction and coordination among users, caregivers and medical staff, both audio and video transmission and recording require ... (audio, video data, and control) is sent though GPRS in several ways Media packets (audio and video) using UDP (nonblocked) socket Other data (controls and data such as biomedical data) are sent ... use of real-time audio/video and medical parameters transmission and storage, in order to provide reliable and timely data to clinicians It can be transported to handle situations where there...
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Báo cáo hóa học: " Design and Realization of a New Signal Security System for Multimedia Data Transmission" ppt
Ngày tải lên :
23/06/2014, 01:20
... of µ and x(0) during the transmission of multimedia data frequently Let µb and Xb denote the built-in keys of µ and x(0), respectively, in the proposed signal security system Let µenc,0 and Xenc,0 ... achieve 117 Mbytes/s data throughput rate at the cost of silicon area of 3.59 mm2 This data- processing rate is fast enough for realtime data protection in multimedia data transmission applications ... the successive data transformation on the input data Eight 8-bit data elements are regarded as a set and fed into an × binary matrix In the successive transformation on each row and each column...
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Creating and Management Data Base
Ngày tải lên :
01/09/2012, 09:09
... trợ giải pháp máy chủ standby RDBMS and Data Management/ Session 7/18 of 25 Nhóm tập tin ghi vết giao dịch Thêm tập tin ghi vết vào sở liệu Cú pháp: ALTER DATABASE database_name { } [;] ::= ... tạo Cú pháp: CREATE DATABASE database_snapshot_name ON ( NAME = logical_file_name, FILENAME = ‘os_file_name’ ) [ , n ] AS SNAPSHOT OF source_database_name [;] RDBMS and Data Management/ Session ... COLLATE collation_name ] ] [;] RDBMS and Data Management/ Session 7/15 of 25 Nhóm tập tin ghi vết giao dịch Thêm nhóm tập tin vào CSDL có: Cú pháp ALTER DATABASE database_name { ...
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Saving and Restoring Data
Ngày tải lên :
03/10/2013, 00:20
... XML for the data content of an existing DataSet instance, call its WriteXml method, passing an output file name C# DataSet infoSet = new DataSet(); // - Add tables, relations, and data, then ... format Reading XML Both the DataSet and DataTable classes include ReadXml and ReadXmlSchema counterparts to the XML-writing methods To use them, create a new DataSet or DataTable instance; then ... XmlReadMode.ReadSchema Reconstructs the DataTable members of the DataSet without loading in the data Chapter 7 Saving and Restoring Data 111 ■■ XmlReadMode.IgnoreSchema Loads in the data, ignoring any schema...
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DIGITAL DATA TRANSMISSION - I
Ngày tải lên :
19/10/2013, 17:15
... Prelab Page 13 Plot of PE vs SNR curves for Base Band and ASK signals is shown below PE v/s SNR curves for Base band and ASK signals - For Base band for ASK -50 PE -100 -150 -200 -250 -300 10 ... the bandwidth No = 1.24exp(-4) Watts/ Hz {measured value} Integrator: This is an integrate and dump circuit with the dump discharging the integrating capacitor and occurring at the end of the data ... oscilloscope as it is generated and detected Page Laboratory Procedure A) Base band Transmission: The circuit is built according to the schematic shown in figure 5A The data rate (fs) is set for kHz...
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DIGITAL DATA TRANSMISSION - II
Ngày tải lên :
23/10/2013, 15:15
... convey digital data Normally, FSK modulation is achieved using just two frequencies to represent binary data For example, a frequency of 2000 Hz may represent a binary (mark) and 1000 Hz a binary ... Master Clock) In this mode, a cosine begins at the start of every data period and proceeds at the frequency fx until the end of the data period Then the process repeats Figure 6c The FSk Modulated ... FSK modulation and demodulation schemes and emphasizes the effect of the distance of separation of the two signal components on the error probability The results of the prelab and those from...
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Tài liệu Managing and tabulating data in Excel docx
Ngày tải lên :
09/12/2013, 15:15
... 12.7 Icons relevant to External Data 195 CHAPTER 13 13.1 Data from the Internet 195 READING ASCII TEXT DATA 198 Understanding ASCII Text data 199 Why is data stored and distributed in this format? ... “1995,” “2000” and “2010”) 2.2.A NEW DATA You can enter the data for a new case/row by clicking on “New” and typing in the data for the first series, pressing the “TAB and then entering the data for ... Two Roles Of Data/ Form 38 CHAPTER 3.1 REDUCING ERRORS IN DATA ENTRY— VALIDATION AND AUTOCORRECT 40 Validating Data During Data- Entry 40 3.1.a 3.1.b 3.1.c 3.1.d Validation for numeric data 42 Message...
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Tài liệu Backups and Hidden Data doc
Ngày tải lên :
10/12/2013, 14:16
... my C:\ drive and typed in backup and sure enough, my Windows 95 box had a backup utility and it worked We were able to make a “backup” of Perl and write it to a couple floppies and restore it ... understand the threats and have a chance at finding them Let’s learn a bit more about how data can be hidden on a computer system It makes sense for attackers or criminals to hide files and data ... with Windows and Unix OS • Viruses: File Infector and Boot Record Infector, Macro • Tools like CHKDSK and MEM may help locate malicious code • Files in DOS and Unix can be hidden and found using...
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Tài liệu Module 10: Backing Up and Restoring Data pdf
Ngày tải lên :
10/12/2013, 16:15
... for backing up and restoring data Module 10: Backing Up and Restoring Data Introduction to Backing Up and Restoring Data Slide Objective Backup To introduce backing up and restoring data Lead-in ... topics and objectives ! ! Backing Up Data ! Restoring Data ! In this module, you will learn how to back up and restore data Preparing to Back Up Data ! Lead-in Introduction to Backing Up and Restoring ... lost and corrupt data A user must have the appropriate user right or permission to back up and restore data Permissions and User Rights Are Required to Back Up and Restore Restore Restore Data...
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Tài liệu Module 4: Grouping and Summarizing Data doc
Ngày tải lên :
11/12/2013, 14:15
... the skills to group and summarize data by using aggregate functions These skills include using the GROUP BY and HAVING clauses to summarize and group data and using the ROLLUP and CUBE operators ... the skills to group and summarize data by using aggregate functions These skills include using the GROUP BY and HAVING clauses to summarize and group data and using the ROLLUP and CUBE operators ... summarize data by groups ! Use the ROLLUP and CUBE operators and GROUPING function to generate summary data ! Use the COMPUTE and COMPUTE BY clauses to generate control-break reports, grand totals, and...
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Tài liệu Java and XML Data Binding Brett McLaughlin Publisher ppt
Ngày tải lên :
12/12/2013, 11:15
... between data- driven and business-driven APIs and explains when one model is preferable over the other It then explains how constraint modeling fits into the data binding picture and how data binding ... open source data binding API, and this chapter details its ins and outs You'll see that Quick offers ideas and processes that are entirely different from most data binding frameworks and you'll ... Command lines and options that should be typed verbatim Names and keywords in Java programs, including method names, variable names, and class names XML element names and tags, attribute names, and...
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Tài liệu Analytical Methods: EViews and Panel Data ppt
Ngày tải lên :
20/12/2013, 18:15
... refer to variables by the first part name and the question mark Thus, if we type a command using GDP? EViews uses all three GDP series for the USA, Canada, and Mexico Notice the button PoolGenr PoolGenr ... coefficients and intercepts Even though you may fail to reject the hypotheses that represent restrictions that you impose, the hypotheses may not be perfectly true, and that may affect the estimators and ... That window is shown here We will describe each element of the specification window Dependent Variable The dependent variable will be typed in according to its name and question mark For example,...
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Tài liệu Backups and Hidden Data ppt
Ngày tải lên :
21/12/2013, 05:16
... my C:\ drive and typed in backup and sure enough, my Windows 95 box had a backup utility and it worked We were able to make a “backup” of Perl and write it to a couple floppies and restore it ... understand the threats and have a chance at finding them Let’s learn a bit more about how data can be hidden on a computer system It makes sense for attackers or criminals to hide files and data ... with Windows and Unix OS • Viruses: File Infector and Boot Record Infector, Macro • Tools like CHKDSK and MEM may help locate malicious code • Files in DOS and Unix can be hidden and found using...
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Tài liệu Consuming and Manipulating Data docx
Ngày tải lên :
21/12/2013, 19:15
... data from, modify data in, and update data sources The DataSet Class The DataSet is a collection of DataTable objects that represent the underlying data of a data source A DataSet has zero or ... Description DataColumnCollection DataColumn The DataColumn object contains data that describes the data in the column (metadata): the column name, the data type, whether the column can be NULL, and so ... disconnected data (such as the DataSet class) System .Data. Common Contains utility classes and interfaces that the data providers inherit and implement System .Data. SqlClient Contains the SQL Server NET data...
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Tài liệu Filtering and Sorting Data pptx
Ngày tải lên :
24/12/2013, 05:15
... sorts the data in DataTable objects in the DataSet The DataViewManager can simplify working with multiple views within a DataSet, but is not required The DataViewManager object exposes a DataViewSettingCollection ... dvm.DataViewSettings[ORDERS_TABLE].RowFilter = employeeIdFilter; // Bind the DataViewManager to the grid dataGrid.SetDataBinding(dvm, CUSTOMERS_TABLE); } Discussion The DataView filters and sorts ... private DataSet ds; // private void FilterSortForm_Load(object sender, System.EventArgs e) { ds = new DataSet( ); SqlDataAdapter da; // Fill the Customers table and add it to the DataSet da...
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Tài liệu Module 10: Creating a Security Design for Data Transmission docx
Ngày tải lên :
18/01/2014, 05:20
... transmitted data, depending on how and where the data is transmitted Lesson objectives After completing this lesson, you will be able to: Describe data transmission methods Explain why securing data transmission ... wireless networks, and the Internet Objectives After completing this module, you will be able to: Determine threats and analyze risks to data transmission Design security for data transmission 2 ... for Data Transmission Lab A: Designing Security for Data Transmission To begin the lab, open Microsoft Internet Explorer and click the name of the lab Play the video interviews for students, and...
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