Tài liệu Updating a Database Using a DataSet doc

... tables. UpdateOrders( ) Takes a DataSet argument containing the changes made to the DataSet created by the LoadOrders( ) method, creates two DataAdapter objects with CommandBuilder generated ... Use a DataSet object. The XML web service code contains two methods: LoadOrders( ) Creates and returns a DataSet containing the Orders and Order Details tables from Northwind an...

Ngày tải lên: 24/12/2013, 05:15

... tables. UpdateOrders( ) Takes a DataSet argument containing the changes made to the DataSet created by the LoadOrders( ) method, creates two DataAdapter objects with CommandBuilder generated ... Use a DataSet object. The XML web service code contains two methods: LoadOrders( ) Creates and returns a DataSet containing the Orders and Order Details tables from Northwind an...

Ngày tải lên: 26/01/2014, 10:20

... it again. The DataSet in this case is referred to as a disconnected DataSet as it doesn't maintain an active connection to the database. Disconnected DataSet objects act as a data cache ... time. Instead, a better approach is to connect to the database, fetch the data into a DataSet object, and then disconnect again. The user can browse the data in the DataSet and m...

Ngày tải lên: 15/12/2013, 00:15

... statement or type declarations. Storage of data and variables is allocated automatically once the data and variables are used. MATLAB statements are normally of the form: variable = expression ... respectively. For addition and subtraction, the array and matrix op- erations are the same. Thus, + and .+ can be regarded as an array or matrix addition. If A1 and B1 are matrices of t...

Ngày tải lên: 22/12/2013, 19:17

Ngày tải lên: 17/01/2014, 09:20

... semilogx(f,abs(h(1,:)),'w',f,abs(h(2,:)),'w',f,abs(h(3,:)),'w') title('Op Amp Frequency Characteristics') xlabel('Frequency, Hz') ylabel('Gain') axis([1.0e-2,1.0e10,0,1200]) ... operational amplifiers, w 1 is very small (approx. 20 π radians /s) and w 2 might be in the range of 2 to 6 mega-radians/s. Example 11.4...

Ngày tải lên: 19/01/2014, 17:20

... fprintf('phasor voltage Van,magnitude: %f \n phasor voltage Van, an- gle in degree: %f \n', Van_abs, Van_ang) fprintf('phasor voltage Vbn,magnitude: %f \n phasor voltage Vbn, an- gle ... Source and Delta- connected Load For a balanced abc system, the voltages VVV an bn cn ,, have the same magni- tude and they are out of phase by 120 0 . Specifically, for a balanced...

Ngày tải lên: 19/01/2014, 17:20

... plot(t,vo,'b') title('State Variable Approach') xlabel('Time, s'),ylabel('Capacitor Voltage, V'),grid subplot(122) plot(t,vo_analy,'b') title('Analytical ... 5.13 Capacitor Voltage vt 0 () Obtained from Both State Variable Approach and Laplace Transform The results from the state variable approach and those obtained from Example...

Ngày tải lên: 19/01/2014, 17:20

... The MATLAB program for obtaining the nodal voltages is shown below. MATLAB Script diary ex4_5.dat % Program determines the nodal voltages % given an admittance matrix Y and current ... title('Power delivered to load') xlabel('load resistance in Ohms') ylabel('power in watts') The results obtained from MATLAB are Maximum power occurs at 1000...

Ngày tải lên: 19/01/2014, 17:20

... format of an output. Table 3.4 shows some formats available in MATLAB. Table 3.4 Format Displays COMMAND MEANING format short 5 significant decimal digits format long 15 significant ... equal size are shown in Table 3.1. Table 3.1 Relational Operators RELATIONAL OPERATOR MEANING < less than <= less than or equal > greater than >= greater than or equal ....

Ngày tải lên: 19/01/2014, 17:20