📄 有源rfid冲突计算.frm
字号:
VERSION 5.00
Begin VB.Form 有源RFID冲突计算
Caption = "有源RFID冲突计算"
ClientHeight = 4185
ClientLeft = 60
ClientTop = 450
ClientWidth = 7650
ControlBox = 0 'False
LinkTopic = "Form1"
MDIChild = -1 'True
ScaleHeight = 4185
ScaleWidth = 7650
Begin VB.TextBox Text7
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H00FF0000&
Height = 375
Left = 4080
TabIndex = 14
Top = 3360
Width = 3375
End
Begin VB.TextBox Text6
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 1215
Left = 5520
MultiLine = -1 'True
TabIndex = 12
Text = "有源RFID冲突计算.frx":0000
Top = 120
Width = 1935
End
Begin VB.CommandButton 退出
Caption = "退出"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 495
Left = 6240
TabIndex = 11
Top = 1920
Width = 1215
End
Begin VB.CommandButton 计算
Caption = "计算"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 495
Left = 6240
TabIndex = 10
Top = 1440
Width = 1215
End
Begin VB.TextBox Text5
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H000000FF&
Height = 375
Left = 4080
TabIndex = 9
Top = 2640
Width = 3375
End
Begin VB.TextBox Text4
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 4200
TabIndex = 7
Text = "2"
Top = 1920
Width = 975
End
Begin VB.TextBox Text3
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 4200
TabIndex = 5
Text = "100"
Top = 1320
Width = 975
End
Begin VB.TextBox Text2
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 4200
TabIndex = 3
Text = "1"
Top = 720
Width = 975
End
Begin VB.TextBox Text1
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 4200
TabIndex = 1
Text = "1500"
Top = 120
Width = 975
End
Begin VB.Label Label6
Caption = "计算至少有 2个 发生相碰的概率 PP"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H00FF0000&
Height = 375
Left = 240
TabIndex = 13
Top = 3480
Width = 3735
End
Begin VB.Label Label5
Caption = "计算发生 M个 相碰的概率 P"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H000000FF&
Height = 375
Left = 240
TabIndex = 8
Top = 2760
Width = 3135
End
Begin VB.Label Label4
Caption = "设置在某时刻发生相碰的RFID个数 M"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 240
TabIndex = 6
Top = 2040
Width = 3855
End
Begin VB.Label Label3
Caption = "同时在基站范围的RFID个数 N"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 240
TabIndex = 4
Top = 1440
Width = 3255
End
Begin VB.Label Label2
Caption = "有源RFID在一秒内唤醒的次数 Y"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 240
TabIndex = 2
Top = 840
Width = 3255
End
Begin VB.Label Label1
Caption = "一秒内基站呼叫的次数 X"
BeginProperty Font
Name = "宋体"
Size = 10.5
Charset = 134
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Left = 240
TabIndex = 0
Top = 240
Width = 2655
End
End
Attribute VB_Name = "有源RFID冲突计算"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Form_Load()
Me.Width = 7770
Me.Height = 4700
End Sub
Private Sub 计算_Click()
Dim P As Double
Dim M As Integer
Dim N As Integer
Dim i As Integer
M = Val(Text4.Text)
P = Px(M)
Text5.Text = Int(P * 100000000) / 100000000
N = Int(Val(Text3.Text))
P = 0
For i = 2 To N
P = P + Px(i)
Next
Text7.Text = Int(P * 1000000000) / 1000000000
End Sub
Private Sub 退出_Click()
Unload Me
End Sub
Private Function Px(Mm As Integer) As Double
Dim X As Double
Dim Y As Double
Dim N As Integer
Dim M As Integer
Dim nm As Integer
Dim i As Integer
Dim P As Double
X = Val(Val(Text1.Text))
Y = Val(Val(Text2.Text))
N = Int(Val(Text3.Text))
M = Mm
' m Y m n! Y m
'P= C * (-----) =----------- *(---)
' n X (n-m)!*m! X
'
nm = N - M
If nm <= 0 Then nm = 1
P = N / (nm * M) / X
For i = N To 1 Step -1
N = N - 1
If N <= 0 Then N = 1
nm = nm - 1
If nm <= 0 Then nm = 1
M = M - 1
If M <= 0 Then
M = 1
X = 1
Y = 1
End If
P = P * (N / nm / M) * Y / X
Next
Px = P
End Function
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