chapter 6 data loading storage and file formats
LƯU TRỮ VÀ CẤU TRÚC TẬP TIN (Storage and File Structure)
... cận để ánh xạ CSDL đến file sử dụng số file, lưu trữ mẩu tin thuộc độ dài cố định vào file cho Một cách khác cấu trúc file cho ta điều tiết nhiều độ dài cho mẩu tin Các file mẩu tin độ dài cố ... chức file đống (Heap File Organization) Trong tổ chức này, mẩu tin lưu trữ nơi file, có không gian cho Không có thứ tự mẩu tin Một file cho quan hệ • Tổ chức file ( Sequential File Organization) ... A-217 A-301 550 • file mẩu tin account Trong phần này, ta giả thiết tất file thứ tự khoá tìm kiếm Các file vậy, với mục sơ cấp khoá tìm kiếm này, gọi file mục (index-sequential files) Chúng biểu...
- 39
- 841
- 1
Tài liệu Chapter 6 Bandwidth Utilization: Multiplexing and Spreading pptx
... Mobile Phone System (AMPS) uses two bands The first band of 824 to 849 MHz is used for sending, and 869 to 894 MHz is used for receiving Each user has a bandwidth of 30 kHz in each direction ... Assume there are no guard bands Solution W e shift (modulate) each of the three v oice channels to a different bandw idth, as show n in Figure 6.6 W e use the 20- to 24-kHz bandw idth for the first ... 20- to 24-kHz bandw idth for the first channel, the 24- to 28-kHz bandw idth for the second channel, and the 28- to 32-kHz bandw idth for the third one Then w e combine them as show n in Figure...
- 58
- 1,551
- 0
Magnetic Material Engineering - Chapter 6: Applications in Medical and Biology pot
... relaxation, and these differences create the contrast between different structures, and the contrast between normal and abnormal tissue, seen on MRI scans Chapter 6: Applications in Medical and Biology ... angle between moments and easy axis Chapter 6: Applications in Medical and Biology Magnetic Material Engineering Magnetic anisotropy Chapter 6: Applications in Medical and Biology Magnetic Material ... flip and reverse its direction The mean time between two flips is called the Néel relaxation time τN and is given by the following Néel-Arrhenius equation: Chapter 6: Applications in Medical and...
- 33
- 973
- 0
Principles of GIS chapter 6 data visualization
... (thematic attributes) and time, and their combination Figure 6.3: Maps and time—“When did the Netherlands have its longest coastline?” As such, maps are the most efficient and effective means to ... This may include infrastructure (e.g., railroads and roads), land use (e.g., vegetation and built-up area), relief, hydrology, geographic names and a reference grid Figure 6.5 shows a small scale ... in the spatial data handling process it takes place and the purpose for which it is needed visualizations can be, and are, created during any phase of the spatial data handling process as indicated...
- 21
- 278
- 0
Chapter 6 data types
... convenient and add to the readability and reliability of p g y programs • Arrays and records are included in most languages • Pointers are used for addressing flexibility and to control dynamic storage ... rights reserved 1-33 Subscript Binding and Array Categories (cont.) (cont ) • Heap-dynamic array: binding of subscript ranges and storage allocation is dynamic and can change any number of times ... Pointers in C and C++ • Extremely flexible but must be used with care • Used for dynamic storage management and indirect addressing • Pointer arithmetic is possible • Explicit dereferencing and address-of...
- 51
- 278
- 0
Chapter 6 human resource training and development
... that group standards were highly effective in establishing individual worker output, and that money was less a factor in determining worker output than group standards, sentiments, and security.” ... organizational culture and climate, group interaction and group leadership, as well as the individuality of employees, all need to be examined and considered when designing and implementing motivational ... include typical items from a specific manager’s mails, and a telephone list Important and pressing matters, such as complaints by customers and a demand for a report from a supervisor, are mixed in...
- 21
- 467
- 0
Lecture management a pacific rim focus chapter 6 establishing organisational goals and plans
... collaboratively for the organisation as a whole and every unit within it; the goals are then used as a basis for planning, managing organisational activities, and assessing and rewarding contributions.’ © 2003 ... operational goals tactical plans operational plans © 2003 McGraw-Hill Australia Pty Ltd PowerPoint Goals and performance Key aspects: • Goal content • Goal commitment • Work behaviour • Other process components ... goals & plans Levels of plans: • Strategic • Operational • Tactical Recurring use: • Single use • Standing planspolicies, procedures, rules Time span of goals /plans: • Short • Intermediate • Long...
- 24
- 402
- 0
Tài liệu Dive Into Python-Chapter 6. Exceptions and File Handling doc
... understand the file handling code in the fileinfo.py sample code from teh previous chapter This example shows how to safely open and read from a file and gracefully handle errors Example 6.6 File ... f in fileList if os.path.splitext(f)[1] in fileExtList] def getFileInfoClass(filename, module=sys.modules[FileInfo. module ]): "get file info class from filename extension" subclass = "%sFileInfo" ... module Class Attribute >>> from fileinfo import MP3FileInfo >>> MP3FileInfo. module 'fileinfo' >>> sys.modules[MP3FileInfo. module ] Every Python class...
- 50
- 414
- 0
Data Mining Association Analysis: Basic Concepts and Algorithms Lecture Notes for Chapter 6 Introduction to Data Mining pdf
... each candidate itemset – To reduce the number of comparisons, store the candidates in a hash structure • Instead of matching each transaction against every candidate, match it against candidates ... structures to store the candidates or transactions – No need to match every candidate against every transaction © Tan,Steinbach, Kumar Introduction to Data Mining 11 Reducing Number of Candidates Apriori ... Generate length (k+1) candidate itemsets from length k frequent itemsets • Prune candidate itemsets containing subsets of length k that are infrequent • Count the support of each candidate by scanning...
- 82
- 3,876
- 0
Data Structures and Algorithms - Chapter 6 -Recursion pot
... difference between two cases: o when the temporary storage areas pushed on the stack come from different functions, and o when the temporary storage areas pushed on the stack come from repeated ... Subprogram implementation Subprogram implementation Subprogram implementation Tree and Stack frames of function calls Tree and Stack frames of function calls Stack frames: Each vertical column shows ... Stack frames illustrate the storage requirements for recursion Separate copies of the variables declared in the function are created for 10 each recursive call Tree and Stack frames of function...
- 85
- 531
- 1
Book Econometric Analysis of Cross Section and Panel Data By Wooldridge - Chapter 6 ppt
... that educ and u1 may be correlated The instruments for educ are parents’ education and husband’s education So, we first regress educ on 1, exper, exper , motheduc, fatheduc, and huseduc and obtain ... (2SLS.3), the usual 2SLS standard errors and test statistics are asymptotically valid If Assumption 2SLS.3 is violated, we simply use the heteroskedasticityrobust standard errors and test statistics ... endogeneity ^ ^ Adding v 21 and v 22 to the OLS regression and computing the joint F test yields F ¼ 0:54 and p-value ¼ 0.581; thus we not reject exogeneity of educ and blackÁeduc Incidentally,...
- 27
- 465
- 0
The Water Encyclopedia: Hydrologic Data and Internet Resources - Chapter 6 docx
... HYDROLOGIC DATA AND INTERNET RESOURCES Dune sand Loose sand and gravel Quicksand Loose boulders in alluvial fans or glacial drift Clay and slit Firm shale Sticky shale Brittle shale Sandstone — poorly ... Basin Plateau Plateau Plains Region S and G along water courses S and G along water courses S and G deposits in valleys and along S and G deposits in valleys and along stream courses Highly productive ... and G outwash, much of it U S and G outwash especially along northern boundary of region —I Alluviated plains and valley fills — M to I S and G outwash, terrace S and G outwash in northern S and...
- 92
- 279
- 0
INTRODUCTION TO KNOWLEDGE DISCOVERY AND DATA MINING - CHAPTER 6 docx
... propagation and recurrent back propaga- 91 Knowledge Discovery and Data Mining tion train quite slowly and so are almost never used in real-time or online learning situations ART and radial basis ... building arbitrary large networks and then pruning out nodes and connections until the smallest network that could the job is produced, and starting with a small network and then growing it up until ... Can Handle Categorical and Continuous Data Types Although the data has to be massaged, neural networks have proven themselves using both categorical and continuous data, both for inputs and outputs...
- 17
- 294
- 0
Mechanisms and Mechanical Devices Sourcebook - Chapter 6
... Bearing adjustment This screw arrangement is a handy way for providing bearing adjustment and overload protection Rapid and slow feed With left- and right-hand threads, slide motion with the nut locked ... 0.4—A linear spring rate and high load resistance with small deflections For height to spring ratios between 0.8 and 1.0—An almost linear spring rate for fasteners and bearing and in stacks For rations ... bearings—such as the ball and roller bearings and of sliding bearings—which include sleeve and hydrostatic bearings Neither rolling nor sliding, flexures simply cross-suspend a part and flex to allow...
- 25
- 380
- 0
Real-Time Digital Signal Processing - Chapter 6: Design and Implementation of IIR Filters
... passband is < F < Wp, the stopband is Ws < F < 1, and Wp < Ws For highpass filters, the normalized frequency range of stopband is < F < Ws, the passband is Wp < F < 1, and Wp > Ws For bandpass and ... passband and a monotonic characteristic in the stopband (see Figure 6.7a) The family of type II Chebyshev filters contains both poles and zeros, and exhibit a monotonic behavior in the passband and ... Chebyshev type II, and elliptic filters, respectively The parameters Wp and Ws are the normalized passband and stopband edge frequencies, respectively The range of Wp and Ws are between and 1, where...
- 62
- 721
- 0
Tài liệu Chapter 6: Force and Motion II docx
... the crate does not move We push harder (frame c) and harder (frame d) and the crate still does not move Finally we push with all our strength and the crate moves (frame e) The free body diagrams ... frictional force As we increase F , f s also increases and the crate remains at rest When F reaches a certain limit the crate "breaks away" and accelerates to the left Once the crate starts moving ... Its magnitude is constant and is given by the equation: f k = µk FN µk is known as the coefficient of kinetic friction We note that: f k < f s ,max Note 1: The static and kinetic friction acts...
- 10
- 502
- 0
Tài liệu Bài 6: Data Access and Viewingwith .NET docx
... DataRow, DataColumn, DataRelation, Constraint – Các lớp đặc biệt: SqlCommand, OleDbCommand, SqlCommandBuilder, OleDbCommandBuilder, SqlConnection, OleDbConnection, SqlDataAdapter, OleDbDataAdapter, ... SqlTransaction OleDbTransaction Data Access and Viewing with NET Editor: Đoàn Quang Minh Đoà Commands Là đối tượng thực thi câu lệnh – Một đối tượng command thông thường sử dụng để thực thi câu ... SqlConnection(source); conn.Open(); SqlCommand cmd = new SqlCommand(select, conn); object o = cmd.ExecuteScalar(); Console.WriteLine ( o ) ; } } Data Access and Viewing with NET Editor: Đoàn Quang...
- 20
- 424
- 0
Tài liệu Embedding Perl in HTML with Mason Chapter 6: The Lexer, Compiler, Resolver, and Interpreter Objects doc
... blocks, and so on), sections for special Mason directives ( blocks, blocks, and so on), and plain text sections (anything outside the other two types of sections) The Perl and text ... Resolver The default Resolver, HTML::Mason::Resolver: :File , finds components and their meta-information (for example, modification date and file length) on disk The Resolver is a pretty simple ... following parameters of its own: • autohandler_name This parameter specifies the name that Mason uses for autohandler files The default name is "autohandler." • code_cache_max_size This parameter...
- 20
- 456
- 1
Tài liệu Creating Applications with Mozilla-Chapter 6. Packaging and Installing Applications-P1 docx
... the manifests and other necessary files Then the Installation section shows how you can put your package in a XPI file and create installation script(s) so it can be distributed and installed ... managing the transfer of files to a specified location on the local disk and alerting the chrome registry to the new files and their manifests The chrome registry then finds and reads those manifests ... affected target files and the second is a list of files that should be overlayed into those targets Do not be confused by the names of the files in this case: the tasksOverlay.xul file is a target...
- 24
- 358
- 0
Tài liệu Creating Applications with Mozilla-Chapter 6. Packaging and Installing Applications-P2 ppt
... message and OK and Cancel buttons deleteRegisteredFile Deletes the specified file and its entry in the Client Version Registry Extracts a file from the XPI file to a Execute temporary location and ... "xfly", "0.9", 0); addFile (file) The addFile( ) method adds a single file to the initialized installation file is a pointer to the file in the XPI that will be installed Example: addFile("simple.exe"); ... (platformNode != 'unix') { // Unix script and files } else if (platformNode != 'win') { // Windows script and files } else { // mac // Mac script and files } 6.3.2.5 The install log When you are...
- 23
- 354
- 0
Tìm thêm: hệ việt nam nhật bản và sức hấp dẫn của tiếng nhật tại việt nam xác định các mục tiêu của chương trình khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo của các đơn vị đào tạo tại nhật bản tiến hành xây dựng chương trình đào tạo dành cho đối tượng không chuyên ngữ tại việt nam điều tra đối với đối tượng giảng viên và đối tượng quản lí điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ hệ số công suất cosp fi p2 đặc tuyến hiệu suất h fi p2 đặc tuyến tốc độ rôto n fi p2 đặc tuyến dòng điện stato i1 fi p2 động cơ điện không đồng bộ một pha thông tin liên lạc và các dịch vụ từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng theo chất lượng phẩm chất sản phẩm khô từ gạo của bộ y tế năm 2008 chỉ tiêu chất lượng 9 tr 25