Il documento si rivolge a chi già conosce le regole degli scacchi e i movimenti dei pezzi e si propone di esporre alcune tattiche di base che si possono applicare ai vari pezzi durante una partita.
Il documento si rivolge a chi già conosce le regole degli scacchi e i movimenti dei pezzi e si propone di esporre alcune tattiche di base che si possono applicare ai vari pezzi durante una partita.
Improving System Security and User Privacy in Secure Electronic Transaction (...IJERA Editor
With the advancement of internets, user’s transaction is at ease, timely manner and effective wise through online payment method, so also cybercriminals become increasingly more prompt in areas like e-commerce sites, financial institutions, payment processes and other online transactions. Therefore the need for the system security and privacy became the central issues for the acceptance of online payment methods in particular and growth of the Internet market in general. Using SET as an open encryption and security specification designed to protect credit card transaction on the internet. This paper proposes a new approach for increasing security by avoiding privacy violation using Public Key Infrastructure, X.509 certificate and Format Preservation encryption method, the credit card number is encrypted using public key algorithm and re-encrypted using Format preservation Encryption algorithm and finally stored in the X.509 version 3 certificate private extensions. This technique can be used to improve the security of the user credit card information against card fraud or the compromise of data associated with the account.
Energy Storage Management in Grid Connected Solar Photovoltaic SystemIJERA Editor
The penetration of renewable sources in the power system network in the power system has been increasing in the recent years. One of the solutions being proposed to improve the reliability and performance of these systems is to integrate energy storage device into the power system network. This paper discusses the modeling of photo voltaic and status of the storage device such as lead acid battery for better energy management in the system. The energy management for the grid connected system was performed by the dynamic switching process.
Improving System Security and User Privacy in Secure Electronic Transaction (...IJERA Editor
With the advancement of internets, user’s transaction is at ease, timely manner and effective wise through online payment method, so also cybercriminals become increasingly more prompt in areas like e-commerce sites, financial institutions, payment processes and other online transactions. Therefore the need for the system security and privacy became the central issues for the acceptance of online payment methods in particular and growth of the Internet market in general. Using SET as an open encryption and security specification designed to protect credit card transaction on the internet. This paper proposes a new approach for increasing security by avoiding privacy violation using Public Key Infrastructure, X.509 certificate and Format Preservation encryption method, the credit card number is encrypted using public key algorithm and re-encrypted using Format preservation Encryption algorithm and finally stored in the X.509 version 3 certificate private extensions. This technique can be used to improve the security of the user credit card information against card fraud or the compromise of data associated with the account.
Energy Storage Management in Grid Connected Solar Photovoltaic SystemIJERA Editor
The penetration of renewable sources in the power system network in the power system has been increasing in the recent years. One of the solutions being proposed to improve the reliability and performance of these systems is to integrate energy storage device into the power system network. This paper discusses the modeling of photo voltaic and status of the storage device such as lead acid battery for better energy management in the system. The energy management for the grid connected system was performed by the dynamic switching process.
200 bài toán nâng cao ôn tập lớp 2 | iHoc.me - Tài liệu toán tiểu họchaic2hv.net
200 bài toán nâng cao ôn tập lớp 2 file word sẽ giúp các thầy cô và các em học sinh luyện tập các bài toán nâng cao dễ dàng hơn.
Tải về máy tài liệu 200 bai toan nang cao on tap lop 2 tại địa chỉ:
http://ihoc.me/200-bai-toan-nang-cao-lop-2/
4. Hai tamgi¸c vu«ng ®ång d¹ng víi nhauHai tamgi¸c vu«ng ®ång d¹ng víi nhau
nÕu tho¶ m·n :nÕu tho¶ m·n :
a)Tamgi¸c vu«ng nµy cã mét gãc nhän
b»ng gãc nhän cña tamgi¸c vu«ng
kia.
b) Tamgi¸c vu«ng nµy cã hai c¹nhgãc
vu«ngtû lÖ víi haic¹nhgãc vu«ng
cña tamgi¸c vu«ng kia.
5. A
CB
A’
B’ C’M N
Tamgi¸c A’B’C’ vµ tamgi¸c ABC cã:
'
''''
;90ˆ'ˆ 0
BC
CB
AB
BA
AA ===
)('''''
''''
cgvchCBAAMNCBMN
BC
CB
BC
MN
AB
BA
BC
MN
AB
AM
−∆=∆⇒=⇒
==⇒=
Suy ra: ABC A’B’C’.
Trªn tia AB®Æt AM=A’B’ qua MvÏ ®êng th¼ng
MN//BC . Ta cã AMN ABC nªn:
C¸ch 2
6. Bµi 1: Cho ABC A’B’C’
(k=3/5) . BiÕt AHvµ A’H’ lµ hai ®êng
cao cña tamgi¸c ABC vµ tamgi¸c A’B’C’.
BiÕt AH=6. TÝnh A’H’.
A
B C
A’
B’ C’
H H’
⇒
ABH A’B’H’(g.g) 5
3
''''
==⇒
BA
AB
HA
AH
10''
5
3
''
6
=⇒= HA
HA
7. A B
CD
6
9
4
Bµi 2: a) T×m
cÆp tamgi¸c
®ång d¹ng cã
trong h×nh vÏ
sau.
b) TÝnh tû sè
diÖn tÝch cña hai
tam gi¸c ABDvµ
tam gi¸c BDC.
8. Bµi 3: a)T×mc¸c tamgi¸c ®ång d¹ng
cã trong h×nh vÏ sau:
2
A
BC H
M
N
6
b)NÕu diÖn tÝch tam gi¸c CMN b»ng 24
th× diÖn tÝch tamgi¸c ABC lµ bao
nhiªu?
2
cm
9. §Þnh lý 1: NÕu c¹nh huyÒn vµ mét c¹nh
gãc vu«ng cña tam gi¸c vu«ng nµy tû lÖ
víi c¹nh huyÒn vµ mét c¹nh gãc vu«ng cña
tam gi¸c vu«ng kia th× hai tam gi¸c vu«ng
®ã ®ång d¹ng.
§Þnh lý 2: Tû sè hai ®êng cao t¬ng øng
cña hai tam gi¸c ®ång d¹ng b»ng tû sè
®ång d¹ng.
§Þnh lý 3: Tû sè diÖn tÝch cña hai tam
gi¸c ®ång d¹ng b»ng b×nh ph¬ng tû sè
®ång d¹ng.
10. Híng dÉn vÒ nhµ
- Häc thuéc c¸c trêng hîp ®ång d¹ng cña
tam gi¸c vu«ng.
- Häc thuéc 2 ®Þnh lý vÒ tû sè ®êng cao
vµ tû sè diÖn tÝch cña hai tam gi¸c ®ång
d¹ng.
- Lµm c¸c bµi tËp 46, 47, 48, 49 (SGK).