Sampling. Signal reconstruction. A sinusoid of unknown frequency f0 is sampled at a rate 60 Hz.
The apparent frequency of the sampled signal is 20 Hz. Determine f0 if it is known that f0 lies in
the range 0 to 30 Hz 30 to 60 Hz 60 to 90 Hz 90 to 120 Hz
Solution
f0=f/fc=60/20=30
so option-A is correct.
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Sams Sports Car Galaxy, a supplier of sports car auto parts, uses .pdf
1. Sam's Sports Car Galaxy, a supplier of sports car auto parts, uses a bar-code system for
inventory of the auto parts. Inventory is automatically checked on a regular basis to determine
when reorders are needed. The system automatically generates a purchase order (PO) that is sent
electronically to an employee for authorization. After approval, the PO is sent electronically to
the vendor.
1. Annotate the preceding paragraph.
2. Identify major participants.
3. Identify activities.
4. Identify possible gateways.
5. Identify database tables.
Solution
1) The Supplier of the car uses the bar code system for inventory according to which when the
inventory reaches the set limit it automatically generates a reorder for the inventory which is then
sent to the employee for authorisation and when it is approved by the employee the purchase
order is sent electronically to the vendor.
2) the nmajor participants are the foreman who send the purchase requsiitons to the purchasing
depatment and the purchase department enters the purchase order which automaticallay enter the
purchase order in sequential order, and the vendor.
3) Activites
The foreman approves and sents the purcahse requisitions to the purchasing department and the
purchase department enter it into the computer system which automatically generates the
autoamctic purchase order in sequential form.The system automatically generates a paper copy
of the purchase order which is sent by the purchasing department ot the vendor.
4) Possible gateways:Business card , confirming order , FedEx , Walk in PO,Vendor Blanket ,
Vendor Blanket Revision Request.
5) database tables - purchase order form and vendors data.