How to get to the first center of Tianjin Metro Line 2

1. < UL >

Tianjin First Central Hospital Address: No.24 Fukang Road, Nankai District, Tianjin

2.

bus line: Metro Line 6, the whole journey is about 4.7km

1. Walk about 900m from Tianjin No.1 central hospital to No.1 Central Hospital Station

2. Take Metro Line 6, pass 4 stops to Changhong Park Station, and then take Metro Line 2

source: www.chinanet.com

3. As we all know, SHA-1 is not a secure cryptographic hash function. Researchers now believe that it is inevitable to find a pair of conflicting hash values (that is, two different input hashes result in the same hash value), which may appear in the next month. This poses a potential threat to the network, because nowadays many websites still use sha-1-based digital signature certificate. Fortunately, just finding a pair of conflicting hash values is not enough to forge digital certificates and break the network trust model
this article describes how to forge digital certificate by hash collision, and how certificate authority makes it more difficult for attackers to forge digital certificate by using random certificate serial number
digital signature is the cornerstone of trust
the Internet depends on trust. Whether you log in online banking or browse reddit, HTTPS always protects you by encrypting communication data and verifying website digital certificate. Most browsers will hang a lock on the address bar intuitively when they visit the website using HTTPS
when the target website has a digital certificate containing the owner's identity information and the host name, HTTPS can confirm the authenticity of the current website to the browser. A certificate is a small file with a digital signature issued by a trusted third party certification authority. For browsers, digital signatures are a source of trust. If your browser believes that the digital signature on the certificate is correct, it will trust the certificate. This system for identity authentication is called public key infrastructure (PKI)
if the digital signature cannot be trusted in the system, all systems relying on the digital signature will crash. For example, someone can forge a cloudflare.com certificate issued by a trusted Ca, and he can fake cloudflare.com to deceive visitors
digital signature is a string of numbers calculated based on message and public key. Each digital signature needs a public-private key pair and a hash function. The hash function is used to replace the message with a unique digest, the private key is used to sign, and the public key is used to verify the signature
for example, to create an RSA signature, you need to calculate the hash value of the message, and then use the private key to encrypt the calculated hash value. Anyone can verify whether the signature belongs to you and the authenticity of the message. We only need to obtain the public key, then decrypt it, and compare the decryption value with the hash value of the source message. If the two values match, we think that the digital signature is correct.

4. Collision is not happy to encounter things, do not think, so all attention to have the wrong to recover

5. The same diameter or different diameter of the tee and the large and small ends of the elbow can be automatically developed by software
steel structure CAD
inputting parameters

6.

1. First, draw the elbow side projection according to the actual size. Including stitches

extended data:

saddle mouth calculation formula, that is, the calculation formula of the length of each prime line. It is as follows:

L = [H] ± rsin α cos β Main view) - & 61480&# 61481;&# 61531;&# 61533;&# 61563;&# 61565; 2290sin α&# 61485;&# 61485; RR (left view)] / sin β Left view)

the saddle mouth is also called tee, the elbow size of this kind, the head, the sky, the round place and so on. This software can be used for steel structure CAD and fully automatic overall lofting

7. Bus route: no.953, about 6.7 km
1. Walk about 730 meters from Tianjin station to Tianjin station
2. Take no.953, pass 9 stops to taidayuan station
3. Walk about 380 meters to people's Park

8.

bus line: 900 bus, about 3.3km in the whole journey

1. Walk about 130m from Xinhua Middle School to Hong Kong Road Station

2. Take 900 bus, after 5 stops, to national hotel station

3. Walk about 150m, Get to the Central Park

walk about 190 meters from Xinhua Middle School to Pukou Road Station

2. Take No. 904 and pass 4 stops to Rongshan Xili station (or take No. 4)

3. Walk about 360 meters, Arrive at Central Park

9.

bus line: Metro Line 3 → Metro Line 1 → Metro Line 2, the whole journey is about 15.7km

1. Take Metro Line 3 from Shijia street to tonghuamen station after 2 stops

2. Walk about 220m, then transfer to Metro Line 1

3. Take Metro Line 1, pass 4 stops, and reach Beidajie station

4. Take Metro Line 2, pass 6 stops, Arrive at the administrative center station and walk 790 meters to Xi'an City Sports Park