Harm of hacker mining
who told you that hackers need to mine? Don't you know they're all ransackers
if you have any questions, please ask.
to prevent hackers from mining with your machine is just like anti malware. Don't visit messy websites, Download messy software, insert picked up USB flash drives, install anti-virus software (Windows Defender on windows is very good, but it's too strict), check and kill viruses regularly, and check abnormal processes and files regularly. If a program attracts UAC, If you don't understand, try to choose no, and don't believe that "it may be misled by anti-virus software". If possible, you'd better install an isolation machine, shadow system, or create a virtual machine directly with Hyper-V of windows system for daily work
for Android phones, phones before Android 6 are unlikely to win. After all, mobile phone mining also needs good hardware. After Android 6, mobile phones have the management of the authority of each application, as long as they don't go blind root, don't install applications of unknown origin, try to download apps from the official market and rece the unnecessary authority as much as possible (you can also use "refrigerator" and "black domain" to prohibit other apps from running in the background)
for the mobile phones of apple, windows and other operating systems, I think that as long as we don't break the prison blindly and keep the system in the latest version, we can prevent the hooliganism of most apps.
Before we learned a simple price situation of enamel steel plate, this time, Xiaobian will take you to have a more in-depth understanding of the proction process of enamel steel plate. We mentioned that enamel steel plate is a kind of composite material, so the proction process is relatively more complex, but its material performance is good, and its appearance is also good-looking, which can be used in many different places. Then come to understand the proction process of this enamel steel plate
I. conditions of enamel steel plate
1. The carbon content is 0.08 ~ 0.12%
2. The surface structure is uniform
3. It is suitable for stretch forming, not easy to crack and wrinkle
4. It is suitable for welding, easy to clean
5. It is not easy to deform and bend ring firing. At present, the commonly used plates and models in China are Baosteel btc1, Maanshan spcc-1dc01, etc
Second, the glaze should have a wide range of firing temperature and resistance to firing, and the coefficient of thermal expansion is appropriate, After firing, it is not easy to proce cracks and deformation5. It has certain explosion-proof performance
the grinding additive and function of glaze formula
1, clay 2, quartz 3, electrolyte (nitrous borax)
the function of clay:
1 as the suspending agent of glaze, plays a suspending role
2, Clay can affect the physical structure and expansion coefficient of enamel ring sintering. Clay can change the covering power, whiteness and luster of enamel. Electrolyte: nitrite: antirust effect. Generally, 0.2-0.5% borax is used as melting aid. The standard thickness of steel plate enamel is 80-120um, The primary glaze is 120 ~ 150um
surface glaze: the surface glaze is divided into base glaze and titanium glaze
the base glaze is mainly used for color matching, the base glaze needs to have good luster and porcelain surface, glue resistance, and it is not easy to proce glue film after Decal
the white glaze needs to have good hiding power and luster, Acid resistance
the thickness of surface glaze is generally 150 ~ 200um
test index and method of glaze slurry:
1 particle size (coarse and fine) 2 specific gravity (solution weight) 3 retention (adhesion)
glaze slurry particle size test
take 50ml glaze slurry and wash it with 200 mesh screen water, After the resial porcelain powder is dried, the following results can be obtained:
standard particle size: down lead: 6-8g surface glaze: 3-5g colored glaze: 2-4G
specific gravity:
take 100ml glaze slurry into a Pycnometer (set bottle weight 50g), The total weight minus the bottle weight can be obtained as follows:
specific gravity requirements: pot cover: down lead 169-170g / 100ml surface glaze: 172-174g / 100ml colored glaze: 172-174g / 100ml
pot body: down lead 166-167g / 100ml surface glaze: 167-169g / 100ml colored glaze: 167-169g / 100ml
adhesion test:
take the plate thickness of 1mm, length and width of 100cm × 10cm stainless steel sheet (set weight as 50g) is placed in the glaze slurry after mixing, and the glaze slurry does not continue to drop until it is lifted vertically (not fast or slow). After weighing and recing the weight of stainless steel sheet, the adhesion amount is
pot cover: downward: 12g / 10 × 10cm white glaze: 14g / 10 × 10cm color glaze: 14g / 10 × 10cm
pot body downward: 7g / 10 × 10cm white glaze: 9g / 10 × 10cm color glaze: 9g / 10 × 10cm
aging of glaze slurry:
the glaze slurry needs to be aged for 36-48 hours before use, which is very important. It can improve the working properties and operating performance of glaze slurry, but if the aging time is prolonged, it will be harmful to the properties of glaze slurry, The surface glaze is generally added (potassium carbonate + magnesium sulfate). Before use, take a small amount of glaze slurry and adjust the thickness. Add the thickness adjusted glaze slurry into the glaze slurry to be adjusted, so as to avoid small bubbles and affect the performance of glaze slurry
In order to improve the unevenness of enameling powder, it is better to adopt natural dripping operation, so as to achieve uniform thickness, rationalization of action, standardization of operation, and save physical strength, so as to rece the defect rate, improve proct quality, rece the amount of glaze slurry, and save cost, Generally follow the principle that the proportion of large procts is slightly lower, the proportion of small procts is slightly higher, and the cover is slightly higher than the pot body2 gesture should be consistent as far as possible, the bottom should be swung 4-5 times, and the two sides should be swung about 2 times, and the force should be subject to the swing of the penlum.
3 when soaking the pot body, it should be 360 degrees to the edge of the pot, not to the bottom, so as to avoid the horizontal bar or too thick bottom, The manufacturing process of enamel steel plate is relatively complex, so we pay attention to the accuracy of hand gestures in the process of firing and enamelling. The accuracy of hand gestures can save the beauty of the finished proct and the amount of raw materials. In addition, in the manufacturing process of enamel steel plate will encounter some more difficult to solve problems, these problems depend on everyone's experience in the actual operation to improve his practice
1. Endangering national security
with superb hacker technology, hackers illegally break into the internal network of military intelligence agencies, interfere with the normal work of military command system, steal, access and tamper with relevant military information, leak highly sensitive information, and intend to create military chaos or political turbulence
On October 16, 2006, Li Jun, a Chinese hacker, released the panda burning incense Trojan horse, which infected millions of Chinese users and spread to neighboring countries in a short period of time. The impact of the incident was extremely bad, and it was listed as the top ten viruses of that year. This shows that hackers destroy the social order In 1995, Vladimir Lenin, a hacker from Russia, put on a wonderful show on the Internet. He was the first hacker in history to gain profits by hacking into the computer system of a bank. In 1995, he invaded Citibank of the United States and stole 10 million. In 1995, he was arrested by Interpol in the United Kingdom, He transferred the money from his account to the United States, Finland, the Netherlands, Germany, Ireland and other places 
extended data:
hacker attack methods to obtain passwords:
first, illegal user passwords are obtained through network monitoring. This kind of method has certain limitations, but the harm is great. The listener can often obtain all the user accounts and passwords of the network segment, which poses a huge threat to LAN security
Second, after knowing the user's account number (such as the part in front of e-mail), some special software is used to forcibly crack the user's password. This method is not limited by the network segment, but the hacker should have enough patience and time Third, after obtaining a user password file on the server (this file becomes a shadow file), use brute force cracking program to crack the user password. The premise of this method is that the hacker obtains the shadow file of the passwordThe so-called hacker program refers to a non infectious system security screening program. It is implanted into the computer system, once the hacker program infects the computer, it will cooperate with the hacker, making the hacker attack very easy
nowadays, the hacker program is very terrible, it's like hiding a video recording device on your computer. It may steal your passbook and credit card account password, peek at your diary, love letters, sometimes, it can even leave a secret door on your computer, and then for hackers to access, to completely control your computer
imagine if hackers enter the important political, economic, military, financial and insurance network systems of the country through a computer and a telephone line, and control or destroy them
hacker software is such a tool, it can make those who know some software become hackers, because everything is ready-made, just learn how to use it. With the help of hacker software, teenagers can become hackers. It's as easy as operating their own computers. It's really a terrible thing to enter and remotely control the computers "infected" by hacker programs through the Internet
Therefore, experts believe that hacker software is not a virus, but it is much more harmful than virusa group of hackers has released a program "back door" to invade windows machines. It allows users to access and control remote windows computers via the Internet. In fact, there are free software downloads all over the Internet now, which is just as dangerous as gun shops everywhere
all computer systems running on Windows 95 / 98 operating platform and networking with TCP / IP protocol are likely to be attacked by hackers. In fact, this includes almost all the network users, who can dial up the Internet through the telephone line to catch all the users
Experts tell us that there are many kinds of hacker programs. The hacker program can be installed automatically as long as it runs deceptively once, and it always works. Its destruction is irregular and unpredictablehacker programs are also spread in various ways, such as email attachments, sharing software programs, chat software, unknown software on pirated CDs, and executable "gift" programs sent by e-cards. This tells us that it is a very dangerous thing to install programs casually, especially the computer systems of important departments
The harm of hacker attack to society
endangering national security
with superb hacker technology, hackers illegally break into the internal network of military intelligence agencies, interfere with the normal work of military command system, steal, access and tamper with relevant military information, leak highly sensitive information, and intend to create military chaos or political turbulence
in recent years, hacker activities began to take on a political color. The Middle East crisis, the India Pakistan conflict and the US Arab war have all become the reasons for hackers with different political positions to fight online