build your own pc for dummies
build your own pc do-it-yourself for dummies
Ngày tải lên :
07/04/2014, 13:56
... MacBook For Dummies; iMac For Dummies; Mac OS X Leopard All-in-One Desk Reference For Dummies; Scanners For Dummies; CD & DVD Recording For Dummies; PCs All-in-One Desk Reference For Dummies; ... PM Page xiv Build Your Own PC Do-It-Yourself For Dummies Chapter 2: What Type of PC Should I Build? 23 Interrogating Yourself on Your Computer Needs .23 Answering Your Computer-Needs ... Configuring Your PC and Hard Drive 132 Formatting Your Hard Drive 134 xv 02_196113-ftoc.qxp xvi 12/12/08 10:51 PM Page xvi Build Your Own PC Do-It-Yourself For Dummies Chapter...
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An introduction to disk drive modeling
Ngày tải lên :
12/09/2012, 14:16
... for example, that • seek times are often modeled as a linear function of seek distance, producing poor results for smaller seeks, which are the most common; • uniform distributions are used for ... perfectly reasonable for the disk’s operation, it makes it nearly impossible to model the disk’s rotational position some 100-200 revolutions after the last known operation Fortunately, many I/O ... determine them experimentally The information required to determine how much power to apply to the pivot motor and for how long on a particular seek is encoded in tabular form in the disk controller...
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Tài liệu Tổng quan về Ổ cứng Hard Disk Drive (HDD) doc
Ngày tải lên :
13/12/2013, 04:15
... mong muốn đầu tư Thông tin servo dành riêng (Dedicated servo information) ghi mặt đĩa từ dự trữ Thông tin servo nhúng (Embedded servo information) lại mã hoá thành chùm liệu ngắn đặt sector Hệ thống ... máy tính xách tay thường dùng vo plastic Vật liệu vỏ cụ thể phụ thuộc vào yếu tố [I]hình dạng (form factor) tức kích thước ổ cứng.[/I] Đĩa từ Đĩa từ ổ cứng đĩa nhôm, thuỷ tinh, sứ có chế độ hoạt ... việc đọc liệu sector sang ghi liệu Khi đọc liệu, đầu từ bỏ qua góc rỗng -Dữ liệu: Thông thường ta format đĩa cứng duới Windows DOS sector chứa 512 byte liệu Phần cuối vùng liệu chứa thông tin mã...
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Tài liệu Hard Disk Drive Servo Systems- P1 docx
Ngày tải lên :
14/12/2013, 19:15
... been the standard for over a decade F IRST 5.25 FORM FACTOR DISK DRIVE (1980): Seagate’s ST-506 was the first drive in the 5.25 form factor, used in the earliest PCs F IRST 3.5 FORM FACTOR DISK ... platter surface F IRST 1.8 FORM FACTOR DISK DRIVE (1991): Integral Peripherals’ 1820 was the first hard disk with 1.8 platters, later used for PC- card disk drives F IRST 1.3 FORM FACTOR DISK DRIVE ... identification [57] In order to achieve a certain desirable performance for a given plant, it is necessary to derive a model for the plant that is adequate for controller design The conventional design techniques...
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Tài liệu Hard Disk Drive Servo Systems- P2 docx
Ngày tải lên :
14/12/2013, 19:15
... transformations , and to put the subsystem into the structural form of Theorem 3.1 and in a small variation of the compact form of Equations 3.20 to 3.23 It can be shown that the compact form ... the work of Chen [74] for a detailed treatment of this particular issue For simplicity, we assume throughout this section that has been determined and hence it is known For the case when , the ... Disturbance Decoupling 71 and (3.165) for for all system: and Then, it can be shown that there exists an such that the following control law is an -suboptimal for the given (3.166) where (3.167)...
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Tài liệu Hard Disk Drive Servo Systems- P3 ppt
Ngày tải lên :
14/12/2013, 19:15
... extreme levels for this time period We can precalculate the minimum time for a specified reference set point Let the control be for (4.17) for We now solve Equations 4.14 and 4.15 for the accelerating ... shown that there exists a satisfying we have Q and hence Case Similarly, for the case when such that for any (5.71) such that for any satisfying we can show that there exists a , we have for ... the optimal control is for for sgn (4.10) The calculus of variation (see [124]) yields the following necessary condition for a time-optimal solution: (4.11) which is known as a costate equation...
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Tài liệu Hard Disk Drive Servo Systems- P4 ppt
Ngày tải lên :
14/12/2013, 19:15
... control technique for continuous-time systems in the following example We consider a continuous-time system of Equation 5.89 with (5.129) (5.130) and The disturbance is unknown For simulation purpose, ... that the increment and implies that N N N (5.164) N Thus, for all , we have , and hence (5.165) Similarly, for the case when it can be shown N Thus, is an invariant set of the closed-loop system ... freedom can be used to command input for any choice of the function improve the performance of the overall system The choice of will be discussed in the forthcoming subsection ii Full-order Measurement...
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Tài liệu Hard Disk Drive Servo Systems- P5 pdf
Ngày tải lên :
14/12/2013, 19:15
... performances, but more studies need to be done before such dual-stage actuated HDDs can be considered for commercialization We present in this chapter the design of track-following controllers for ... the PTOS control law for our disk drive is as is given by l follows: 7.3 Track-seeking with MSC P where sat 203 (7.6) with being the target reference, and for (7.7) sgn for with (7.8) and (7.9) ... by Equations 5.79 and 5.80 for the commercial hard disk model shown in Figure 6.1 As the CNF control law depends on the size of the step command input, we derive, for our HDD model given in Equation...
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Tài liệu Hard Disk Drive Servo Systems- P6 pdf
Ngày tải lên :
14/12/2013, 19:15
... actuator the performance of the servo systems This issue becomes more noticeable for small drives and is one of the challenges to design head positioning servo systems for small HDDs Much effort has ... N N sgn (9.1) N where is the friction force, N is the normal force, i.e the force perpendicular to the contacted surfaces of the objects, is the external force applied to the object, is the relative ... [168]) to estimate friction parameters for typical DC motors for which both velocity and displacement are measurable and without constraint Unfortunately, for the VCM actuator studied in this chapter,...
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Tài liệu Hard Disk Drive Servo Systems- P7 pptx
Ngày tải lên :
14/12/2013, 19:15
... target reference, say l good testbed for control techniques developed for systems with actuator saturation Interested readers are referred to Chapter for more information on track seeking of HDD ... controllers for hard disk drives with novel reference signal generation Proc American Contr Conf; San Diego, CA; 1999 p 4132–6 Huang Y, Messner WC, Steele J Feed-forward algorithms for time-optimal ... improvement of tracking performance – nonlinear feedback for linear systems Int J Contr 1998; 70:1–11 131 Turner MC, Postlethwaite I, Walker DJ Nonlinear tracking control for multivariable constrained...
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Tài liệu Hard Disk Drive Servo Systems- P8 docx
Ngày tải lên :
14/12/2013, 19:15
... Improving transient performance in tracking control for a class of nonlinear systems with input saturation Syst Contr Lett 2006; 55:132–8 137 He Y, Chen BM, Lan W Improving transient performance in tracking ... control for a linear brushless DC motor IEEE/ASME Trans Mechatron 2003; 8:56–65 191 Hwang CL, Jan C Optimal and reinforced robustness designs of fuzzy variable structure tracking control for a ... Takaishi K Vibration minimized access control for disk drives IEEE Trans Magn 1996; 32:1793–8 145 Yamaguchi T, Nakagawa S Recent control technologies for fast and precise servo system of hard disk...
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Tài liệu Giải quyết lỗi “Setup did not find any hard disk drives” khi cài Windows XP ppt
Ngày tải lên :
23/12/2013, 18:15
... ta sử dụng chương trình WinImage Với ví dụ sau, bạn thấy đường dẫn download cho Intel SATA controller driver cho máy tính HP Download chạy file thực thi để giải nén file với tên gọi f6flpy32.exe ... download phần mềm Cài đặt khởi chạy chương trình nLite, bạn nhận thông báo nạp vào cài đặt Windows, kích vào nút Browse Duyệt tới thư mục chứa cài đặt ổ đĩa CD, sau kích vào OK cửa sổ Browse For...
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Tài liệu Giải quyết lỗi “Setup did not find any hard disk drives” khi cài Windows XP pptx
Ngày tải lên :
25/01/2014, 02:20
... download phần mềm Cài đặt khởi chạy chương trình nLite, bạn nhận thông báo nạp vào cài đặt Windows, kích vào nút Browse Duyệt tới thư mục chứa cài đặt ổ đĩa CD, sau kích vào OK cửa sổ Browse For...
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Vô hiệu hóa các ổ USB, CD-ROM, Floppy Disk và LS-120 bằng Group Policy potx
Ngày tải lên :
03/04/2014, 12:20
... KEYNAME "SYSTEM\CurrentControlSet\Services\USBSTOR" EXPLAIN !!explaintextusb PART !!labeltextusb DROPDOWNLIST REQUIRED VALUENAME "Start" ITEMLIST NAME !!Disabled VALUE NUMERIC DEFAULT NAME !!Enabled ... KEYNAME "SYSTEM\CurrentControlSet\Services\Cdrom" EXPLAIN !!explaintextcd PART !!labeltextcd DROPDOWNLIST REQUIRED VALUENAME "Start" ITEMLIST NAME !!Disabled VALUE NUMERIC DEFAULT NAME !!Enabled ... "SYSTEM\CurrentControlSet\Services\Flpydisk" EXPLAIN !!explaintextflpy PART !!labeltextflpy DROPDOWNLIST REQUIRED VALUENAME "Start" ITEMLIST NAME !!Disabled VALUE NUMERIC DEFAULT NAME !!Enabled...
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Hacking quota floppy disk eject motor
Ngày tải lên :
18/04/2014, 09:12
... use rubbing alcohol on a clean rag Now just glue your parts together For what it's worth, I use a type of epoxy made primarily for metal bonding for this work It seems to work a bit better, doesn't ... and use the brown and red leads as follows: For CCW rotation (facing the white output gear, with the metal "nub" pointing at you), connect the red wire to positive voltage, and brown to negative ... "hacked" for a head Now prep your parts for gluing the surfaces you want the epoxy to "grab" need to be roughened a bit (via sandpaper), cleaned, and degreased For degreasing, I use rubbing...
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Tổng quan về Ổ cứng Hard Disk Drive (HDD) potx
Ngày tải lên :
29/07/2014, 11:21
... mong muốn đầu tư Thông tin servo dành riêng (Dedicated servo information) ghi mặt đĩa từ dự trữ Thông tin servo nhúng (Embedded servo information) lại mã hoá thành chùm liệu ngắn đặt sector Hệ thống ... việc đọc liệu sector sang ghi liệu Khi đọc liệu, đầu từ bỏ qua góc rỗng -Dữ liệu: Thông thường ta format đĩa cứng duới Windows DOS sector chứa 512 byte liệu Phần cuối vùng liệu chứa thông tin mã...
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