file handling and applications
Tài liệu Dive Into Python-Chapter 6. Exceptions and File Handling doc
Ngày tải lên :
26/01/2014, 08:20
... 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" ... you wrote to the file ended up smooshed together on the same line Further Reading on File Handling * Python Tutorial discusses reading and writing files, including how to read a file one line at...
- 50
- 414
- 0
fluidization solids handling and processing industrial applications
Ngày tải lên :
02/04/2014, 14:57
... spanning the basic and specialty chemicals, agricultural products, pharmaceuticals, paints, dyestuffs and pigments, cement, ceramics, and electronic materials Solids handling and processing technologies ... Cataloging-in-Publication Data Fluidization, solids handling, and processing : industrial applications / edited by Wen-Ching Yang p cm Includes bibliographical references and index ISBN 0-8155-1427-1 Fluidization ... emphasis of the book is for industrial applications and the primary audience is expected to be the practitioners of the art of fluidization, solids handling, and processing It will be particularly...
- 906
- 343
- 1
Multi-Carrier Digital Communications - Theory and Applications of OFDM
Ngày tải lên :
02/03/2013, 16:58
... time and coherence bandwidths Then, by using time and frequency interpolation, the impulse response and frequency response of the channel can be calculated Figure 2.7 Pilot positioning in time and ... With Wireless Applications Sergio Benedetto and Ezio Biglieri Simulation of Communication Systems, 2nd Edition: Methodology, Modeling, and Techniques Michel C Jeruchim, Philip Balaban, and K Sam ... elsewhere The book concludes with descriptions of three very important and diverse applications of OFDM that have been standardized and are now being deployed ADSL provides access to digital services...
- 221
- 976
- 1
Data mining and medical knowledge management cases and applications
Ngày tải lên :
16/08/2013, 16:24
... Information and Knowledge and communication technologies These new technologies are speeding an exchange and use of data, information and knowledge and are eliminating geographical and time barriers ... supported by arguments, and the explanation of decisions and predictions should be mandatory for an effective deployment of DM models DM and KM are thus becoming of great interest and importance for ... Data Data mining and medical knowledge management : cases and applications / Petr Berka, Jan Rauch, and Djamel Abdelkader Zighed, editors p ; cm Includes bibliographical references and index Summary:...
- 465
- 631
- 2
Investigation on K2Ti4O9 Whisker Absorbent and Applications in Heavy Metal Ions Removal
Ngày tải lên :
05/09/2013, 09:38
... Water and Environment Technology, Vol.5, No.1, 2007 RESULTS AND DISCUSSION Absorption behavior of PTW Fig shows the relationship between the quantity of PTW and the adsorption efficiency of Pb2+ and ... Preparation and Applications of Potassium Titanate Whisker, Journal of Salt Lake Research, Vol.12 , No.4, 58-59 [2]Qinghao Meng, Xiaofeng Li and Zhiqiang Du, etc (2002)Synthesis and Characterization ... PTW increases quickly in the beginning and slows down gradually, and reaches constant at equilibrium It is because that in the beginning, PTW is fresh and the metallic ion contents are high,...
- 6
- 437
- 0
File System and Disk Administration
Ngày tải lên :
28/09/2013, 11:20
... dùng lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Nh ta biêt hệ thống file UNIX đợc lu trữ dới dạng ... để kiểm tra file không tham chiếu đếm liên kết không file, directory, file đặc biệt Thông báo nh sau: UNREF FILE I=inode number OWNER=O MODE=M SIZE=S MTIME=T (RECONNECT?) LINK COUNT FILE I=inode ... tất file systems đợc mount Chi tiết lệnh xem tài liệu ứng với loại hệ điều hành UNIX Unmounting file systems Để bỏ mount hệ thống file dùng lệnh umount umountall Lệnh umount: Bỏ mount hệ thống file...
- 10
- 521
- 0
Voice over IP Benefits and Applications
Ngày tải lên :
30/09/2013, 05:20
... download voice mail and respond electronically, and to forward voice mail to a group Such technology exists today and will soon be available and widely used through enterprise and service provider ... can burst up to 56 K Raleigh and San Diego both have a 64 K CIR and can burst up to 128 K The IS department conducted a study and determined that both data and voice bandwidth needs were growing ... a combined voice and data network would provide the expected savings Acme's Convergence Plan and Goals It is important to understand where the customer's network stands today and where the customer...
- 15
- 436
- 0
File system and Disk Administration
Ngày tải lên :
09/10/2013, 13:20
... lệnh newfs), mkswap tạo swap file system Ví dụ mke2fs /dev/hda1 mkswap /dev/hda2 Mounting and unmounting file systems Mounting file systems Như ta đ biêt hệ thống file UNIX lưu trữ dạng thư mục ... để kiểm tra file không tham chiếu đếm liên kết không file, directory, file đặc biệt Thông báo sau: UNREF FILE I=inode number OWNER=O MODE=M SIZE=S MTIME=T (RECONNECT?) LINK COUNT FILE I=inode ... thiết bị thể dạng file Các file thiết bị thường đặt thư mục /dev Với hệ điều hành UNIX file thiết bị ký hiệu khác đặt mức thư mục thấp Thông thường hệ điều hành UNIX tự động tạo file thiết bị mà...
- 10
- 322
- 0
Chapter-10-File systems and devices
Ngày tải lên :
22/10/2013, 19:15
... stands for read permission, w stands for write permission, and x stands for execute permission The three groups represent the permissions for the owner, the group and others respectively If the ... (I can read and execute the program, and nobody else can anything with it) The permissions for the draft document would be rw-r - (I can read and write, the group can read, and others can’t ... Mail Makefile Makefile.bak Makefile˜ depend deppert.floppy doio filesys.mm,v v4.17 (2003/04/02 06:43:57) April 2003, 17:00:47 The Complete FreeBSD ( /tools/tmac.Mn), page 183 183 Chapter 10: File...
- 17
- 461
- 0
Practical mod_perl-CHAPTER 21:Error Handling and Debugging
Ngày tải lên :
24/10/2013, 08:15
... PerlPostReadRequestHandler handlers returned `PerlTransHandler' push_handlers( ) stack is empty PerlTransHandler handlers returned -1 `PerlInitHandler' push_handlers( ) stack is empty PerlInitHandler handlers ... the open _file( ) function: sub open _file { my $filename = shift; die "No filename passed" unless defined $filename; open FILE, $filename or die "failed to open $filename: $!"; } open _file( "/tmp/test.txt"); ... `PerlHeaderParserHandler' push_handlers( ) stack is empty `PerlAccessHandler' push_handlers( ) stack is empty PerlAccessHandler handlers returned -1 `PerlTypeHandler' push_handlers( ) stack is empty PerlTypeHandler...
- 77
- 299
- 0
Understanding GPS principles and applications 2nd kaplan2006
Ngày tải lên :
27/10/2013, 15:59
... Government and Military Applications 12.9.1 Military User Equipment—Aviation, Shipboard, and Land 12.9.2 Autonomous Receivers—Smart Weapons 12.9.3 Space Applications 12.9.4 Other Government Applications ... examples of applications are presented next Further discussion on applications and market projections is contained in Chapter 12 1.9.1 Land The majority of GNSS users are land-based Applications ... Principles and Applications Second Edition Elliott D Kaplan Christopher J Hegarty Editors artechhouse.com Library of Congress Cataloging-in-Publication Data Understanding GPS: principles and applications/ [editors],...
- 724
- 339
- 2
Tài liệu Metal Machining Theory and Applications ppt
Ngày tải lên :
17/12/2013, 11:15
... of, and Chapters and with the development and application of, finite element methods in machining analysis Chapter is concerned with embedding process understanding into process control and optimization ... 1.13 A traditional – column and knee – design and (right and below) partly-built and complete views of a modern (bed) design of milling machine In Figures 1.16(a) and (b) the capacity of a milling ... thousands made in small batches, less than 10 to 20 or even one at a time, then planning improved materials handling strategies is probably not worthwhile The large amounts of materials handling...
- 416
- 540
- 0
Tài liệu Lab 3.1.1 Safe Handling and Use of a Multimeter docx
Ngày tải lên :
21/12/2013, 19:15
... taken to avoid electrical shock Step Insert the red and black leads into the proper jacks on the meter a The black probe should go in the COM jack and the red probe should go in the + (plus) jack ... Step Swith or turn to different measurements For example, voltage, and ohms a How many different switch positions does the multimeter have? b What are...
- 2
- 392
- 0
Tài liệu PLC Programming Methods and Applications P2 pptx
Ngày tải lên :
22/12/2013, 21:18
... only handling discrete inputs and outputs (that is, on-off type signals), while today's systems can accept and generate analog voltages and currents as well as a wide range of voltage levels and ... cumbersome and time consuming to modify Wiring had to be removed and replaced to provide for the new control scheme required This modification was difficult and time consuming to design and install and ... dangerous to hand-feed the machine while it is cycling The two buttons are positioned apart so that they both cannot be pressed by one arm (e.g., a hand and elbow) Both buttons must be released and pressed...
- 20
- 509
- 0
Tài liệu PLC Programming Methods and Applications P1 docx
Ngày tải lên :
22/12/2013, 21:18
... Fundamentals SWITCH1 and SWITCH2 and SWITCH3 SWITCH1 and SWITCH2 and SWITCH4 SWITCH1 and SWITCH3 and SWITCH4 SWITCH2 and SWITCH3 and SWITCH4 SWITCH1 and SWITCH2 and SWITCH3 and SWITCH4 SWITCH1 ... energize a rung For this OR -AND circuit, LAMP4 will be lit when the following combinations of switches are on: SWITCH1 and SWITCH3 SWITCH1 and SWITCH4 SWITCH2 and SWITCH3 SWITCH2 and SWITCH4 1-18 Chapter ... thorough understanding of fundamental ac and dc circuits, electronic devices (including thyristors), a knowledge of basic logic gates, flip flops, and Boolean algebra, and college algebra and trigonometry...
- 30
- 484
- 1
Plc programming methods and applications
Ngày tải lên :
25/12/2013, 09:01
... Fundamentals SWITCH1 and SWITCH2 and SWITCH3 SWITCH1 and SWITCH2 and SWITCH4 SWITCH1 and SWITCH3 and SWITCH4 SWITCH2 and SWITCH3 and SWITCH4 SWITCH1 and SWITCH2 and SWITCH3 and SWITCH4 SWITCH1 ... only handling discrete inputs and outputs (that is, on-off type signals), while today's systems can accept and generate analog voltages and currents as well as a wide range of voltage levels and ... thorough understanding of fundamental ac and dc circuits, electronic devices (including thyristors), a knowledge of basic logic gates, flip flops, and Boolean algebra, and college algebra and trigonometry...
- 271
- 490
- 1
Adaptive dual control theory and applications
Ngày tải lên :
01/01/2014, 18:08
... and Filatov, 1995); and the parameters of the above mentioned quadratic criterion provide certain pole locations of the closed-loop systems and are frequently used for this purpose (Keuchel and ... reference adaptive control (MRAC) (Landau and Lozano, 1981), adaptive pole-placement controllers (APPC) with direct and indirect adaptation (Filatov et al., 1995; Filatov and Unbehauen, 1996b), pole-zero ... nξ , (k ) ∈ ℜ nε and (k ) ∈ ℜ nη the vector of unknown parameters; ny the vector of system outputs; and are vectors of independent random white noise sequences with zero mean and known probability...
- 250
- 403
- 0
Interval analysis theory and applications g otz alefelda g unter mayerb
Ngày tải lên :
12/01/2014, 22:05
... +; −; ·; = and standard functions ’ ∈ F If one replaces the variable x by an interval [x] ⊆ D and if one can evaluate the resulting interval expression following the rules in (1) and (4) then ... on (6) – (8) and Brouwer’s ÿxed point theorem and reads as follows Theorem Let f:D ⊆ Rn → Rn be continuous and let f([x]) ⊆ [x] ⊆ D: (22) Then f has at least one ÿxed point in [x] and the iteration ... Krawczyk’s method is well deÿned and x∗ ∈ [x]k ; k¿0 If on the other hand f(x) = and K[x]k ∩ [x]k = ∅ then {[x]k } is well deÿned Because of (B) ¡ we have d[x]k → and since we have a nested sequence...
- 44
- 479
- 0