Where is the Huangpu tourist center
Chang RI Chang also means a long time in business
Private Sub dceb_ Click ()
the process of defining "click Print button" is
Data4. Refresh
data control Data4 refresh
jjhj = 0, cjhj = 0, ML = 0
these three parameters should be the three column names in the print preview
while Data4. Recordset. EOF = false
when the recordset in data control 4 is not empty
jjhj = jjhj + Data4. Recordset. Fields (4)
the assignment of the first parameter is the original value (that is, 0) plus the value of the fourth column in the recordset
cjhj = cjhj + Data4. Recordset. Fields (5)
the assignment of the second parameter
ml = ml + Data4. Recordset. Fields (6)
ml = ml + Data4 />The third parameter assignment
Data4. Recordset. MoveNext
the pointer of the data control moves down
wend
all the way to the end
DE1. Rscommand2. Open
DE1 is a form, Open a control rscommon2 (a data display control)
DE1. Rscommand2. Addnew
the control pointer points to a new blank line
DE1. Rscommand2. Fields (0) = & quot; Total: & quot
column 0 is named total
de1.rscommand2.fields (1) = & quot---& quot;< The first column is named ---
de1.rscommand2.fields (2) = & quot--& quot;
de1.rscommand2.fields (3) = 0
de1.rscommand2.fields (4) = jjhj
de1.rscommand2.fields (5) = cjhj
de1.rscommand2.fields (6) = ml
the above column is not repeated
datareport2.show 1
the data report window is displayed with parameter 1, and the following dialog box
k = msgbox & quot; Attention& quot; & Chr(13) & " If the data has been printed, click Yes, & quot& Chr(13) & " Otherwise, click No, please confirm& quot;, Vbyesno + vbinformation)
here, K should be a parameter not mentioned in the original but actually assumed, It is used to describe the state value
If k = 6, then if the state value is 6, the records in the data control will be deleted one by one
Data4. Refresh
while Data4. Recordset. EOF = false
Data4. Recordset. Delete
Data4. Recordset. MoveNext
wend
end if
DE1. Rscommand2. Close after deleting, the window will be closed . This shows that this window is likely to be a preview window
End Sub ends the definition
most of the code is abbreviated, which varies according to the habits of programmers. So to explain this, it's too much to guess. Only when you see the specific window and the corresponding function can you correctly explain it.
as evolutionary computation generally uses external penalty function, this paper mainly introces the evolutionary computation of external penalty function The researchers choose the external penalty function to provide the initial row solution, but the internal penalty function has the main disadvantage because the practical problems of evolutionary algorithm can exist the NP hard problem of searching row solution, which is not fatal
the form of external penalty function
b (x) = f (x) + [∑ Rigi + ∑ cjhj]
the new objective function gihj of its B (x) optimization process, the other constraint condition GI (x) HJ (x) function ricj number is called penalty < B (x) R / > gihj see form
GI = max [0, GI (x)] a
HJ = | HJ (x) | B
its AB like 1 or 2
in the ideal case, the penalty should be lower than the value as far as possible to proce non-linear solutions. The optimal solution (called penalty rule) is difficult to solve the problem e to the penalty or evolutionary algorithm, and the optimal solution row boundary evolutionary algorithm can be quickly pushed to search the boundary of the non-linear domain Evolutionary algorithm can only move its region to search the region which is difficult to search, unless some regions are not close to the other side, and the penalty function term is too close to the objective function, then the non-linear domain will be spent between the quantity search. Because the optimal solution of the problem is always on the boundary of the non-linear domain between the quantity search, the search for the optimal solution does not work on evolutionary algorithm. The concept of non fatal
penalty rule is simple, but it is not difficult to determine the non-linear domain boundary of evolutionary algorithm problem It is difficult to determine the exact location of the non row search space, and the relationship between row regions plays a non important role in the body punishment. The principle of using the relationship to guide the search and guide the desired region is clear.
there are three main definitions of the relationship between row regions and non row regions.
(1) the value of the body punishment is only related to the non row relationship and the constraint violation (even if the distance between the body and row regions is used)
(2) violation (3) the cost of non line repair (i.e. the cost of the required repair line)
the researchers studied and designed the penalty function heuristics, and the famous Richardson et al. Proposed the following specific contents:
(1) the performance of using the line domain distance penalty function is better than that of using the constraint violation penalty function
(2) the problem has only a few constraints (3) the performance of penalty function can be evaluated by two criteria: the expected completion is related to the distance between the completion and the row
(4) the penalty function should be close to the expected completion, and the more accurate the expected completion is, the more accurate the penalty function is, the better the solution can be found.
the penalty function can not only deal with the equality constraints In general, equality constraints are transformed into equality constraints
| HJ (x) | - E & lt= 0
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