Part VII: Working with Specialized Functionality in .NET

Printing QR-Code in .NET Part VII: Working with Specialized Functionality

tem s memory cache so that you do not have to manually retype this information each time you wish to use it.

LP P2,4

By Euler's relationship for any 'ordinary' polyhedron, V + F E + 2. So, if V = F, then 2V = 2F = E + 2, and therefore E must be even. The cases E = 2 and V = 2, and E = 4 and V = F = 3, cannot be constructed as polyhedra. For E = 6 and V = F = 4, we get the tetrahedron that we have already considered. The case E 8 and V = F = 5 corresponds to a square pyramid (Fig. 13.23). This joins on to the previous case because a tetrahedron can be thought of as a triangular pyramid. The next case, E = 10 and V = F = 6 could yield a pentagonal pyramid - and so on - all higher values of E (and the matching equal values of V and F) can be matched against pyramids with more and more sides.

[2(12 - 1,)] 1/2 [ ( 1')]

You can implement a StreamReader class in two ways: through the path of a physical disk file or through an existing stream. The syntax is identical for creating both types of StreamReader objects with the exception of the first argument, path or stream: (path As String[, encoding As Encoding[, bufferSize As Integer[, detectEncodingFromByteOrderMarks As Boolean]]]) Or for implementing a stream class: (stream As Stream[, encoding As Encoding[, bufferSize As Integer[, detectEncodingFromByteOrderMarks As Boolean]]]) For example: Dim s as new StreamReader("C:\MyFile.txt") The optional arguments are as follows: Encoding : Specified character encoding to use. BufferSize: Suggested minimum buffer size. DetectEncodingFromByteOrderMarks: Encoding type indicator. When you read data from the StreamReader for the first time, you can change the encoding by changing the encoding flag. The detectEndcodingFromByteOrderMarks argument detects the encoding from the first three bytes of the stream. The big endian, little endian, and UTF-8 Unicode text are automatically recognized. If the encoding cannot be determined, the user-defined encoding is implemented. Table 10-9 lists the core members of the StreamReader class. Table 10-9: StreamReader Members Member Close Description Closes the StreamRead er and releases any resources associated with the object. Allows a StreamRead er to discard its current data. Returns the next available character without reading it from the stream. Reads the next character(s) from the stream. Reads the

where CTOT = CCG + CD + CS + Cchan + CB and the C terms indicate the capacitance between the floating gate and the control gate, drain, source, channel, and body, respectively. The capacitance ratios appearing in Eq. 8.1 are often referred to as the coupling ratios. To program with CHE, hot electrons must be generated in the pinchoff region and collected on the floating gate. For efficient. collection, the floating gate must be at a more positive potential than the channel in the vicinity of the pinchoff point where most of the hot electrons are generated. These conditions can be created by applying a moderately high voltage to the control gate to provide a collecting potential for the hot carriers. A somewhat lower drain bias serves to produce the hot carriers. The lucky electron model has been applied to drain-side CHE programming of EPROMs. 11 The model predicts that the gate current is given by

Figure 3.4 shows a useful nomograph of the mismatch conversion formulas of Figure 3.3. The left-hand side of the gure is a perfect match. The percentage of re ected power is 0, the re ection coef cient is 0, the SWR is 1, and the return loss is in nity. The right-hand side of the gure is a short. The percentage of re ected power is 100, the re ection coef cient is 1, the SWR is in nity, and the return loss is 0. Three signi cant mismatch values are shown by the three vertical lines (Fig. 3.4). The line at 1% re ection is generally considered to be an acceptable match. Of course, 0% re ection is better, but it is expensive to achieve in actual equipment. The line at 4% re ection is often used as a speci cation for an overall RF system mismatch. The third line at 10% is the maximum allowable mismatch. Greater values of mismatch must be reduced by using the matching techniques described in Sections 3.5 3.10. Return loss, SWR, and re ection coef cient are merely different ways of specifying the ratio of the re ected power to the incident power at a mismatch. To characterize a mismatch completely, however, the amplitude of the mismatch (as expressed by return loss, SWR, or re ection coef cient) and the phase of the re ected RF eld relative to the incident eld must be speci ed. Thus far, the discussion has covered only the amplitude of the re ected and incident signals.

Because the list of commands is so long, there is a Search function available, and a drop-down arrow that makes visible only the commands from a selected menu. The list of commands is organized by menu name, and the menus are listed as they occur in the interface. Fortunately, here on the Keyboard tab, SolidWorks allows you to sort using the column headers to list the menus, commands, or hotkeys in alphabetical order, simply by clicking the column header. This is a highly usable interface.

( r + Re ) 1 + ( rc + Rc ) ro r + Re [ r + ( o + 1) ro ]

mysql> create table players (id int auto_increment primary key, -> first_name varchar(255), -> last_name varchar(255), -> number int, -> team int, -> batting_avg float, -> position varchar(255)); Query OK, 0 rows affected (0.01 sec) mysql> create table games (id int auto_increment primary key, -> visiting_team int, -> home_team int, -> visiting_score int, -> home_score int, -> game_date date); Query OK, 0 rows affected (0.00 sec)