Characteristics of miner poisoning
In fact, it's not difficult. When we use mobile phones everyday, there will be some background applications, which will be "killed" after restart. However, if the mobile phone is hacked and rebooted, it will enter a high load state again, and the system running memory will be used up quickly. Therefore, if the mobile phone is stuck, hot or dead for no reason, it may be g
it is possible that hackers steal all the information before using mobile phones to "mine" cryptocurrency. People will not only encounter problems such as cell phone stuck, fever and even crash, but also other financial losses
moreover, it is worth noting that some mobile mining apps, in the name of "mining", allow users to invest money and continue to develop offline
MLM refers to MLM organizations selling or providing services through multi-level (MLM: multi-level marketing) and independent MLM operators. Each MLM operator can not only sell goods to earn profits, but also introce and train others as New MLM operators, and establish a new sales network to sell the company's goods, so as to make more profits for the company, Each MLM member also gets the corresponding balance in their own sales network. MLM is popular all over the world, so MLM enterprises get a large amount of profit, but not Commission. It is precisely because of the huge commercial profits of MLM that some illegal businessmen tend to use the way of MLM to carry out illegal MLM, turn the legitimate MLM into illegal forms such as "network chain", gather wealth and cheat the masses in disguise, thus causing various types of crimes with the pursuit of property as the core. MLM originated from the genius idea of two math students at Harvard University in the United States. At the beginning, they just studied multiplication, such as the mathematical model of 1-variable-2, 2-variable-4. Later, it was quoted into marketing and became MLM< The obvious characteristics of MLM are as follows:
1. The commodity price of MLM deviates from the actual value of the commodity itself seriously. Some MLM commodities have no use value and service items are fictitious< (2) the income of participants does not come from the reasonable profit from selling procts or services, but from the fees paid by others when they join< In our country, it belongs to financial fraud. It has three characteristics:
1. It takes membership fee as profit point,
2. It takes high return as t< 3. The development of pyramid
pyramid schemes can be divided into the following categories: violent pyramid schemes, traditional pyramid schemes, new pyramid schemes, online pyramid schemes, legal pyramid schemes and unprofitable pyramid schemes
1. Violent MLM, the most primitive form of MLM, uses restrictions on personal freedom or even kidnapping to achieve the goal of MLM. Some of them don't even know what the proct is. It's rare now
2. Traditional MLM, in the form of class and brainwashing, allows people to voluntarily join MLM organizations. They have procts, but they can't afford to consume at all. MLM organizations will limit some of your freedom, such as making phone calls and so on. We often see tens of thousands of people in MLM. The above two are the targets of the government's attack
3. The new type of MLM, some procts can also be consumed, but the price is higher, completely free, you can do it if you want, you can go if you don't want. Of course, it's hard to say if you pay the membership fee
4. Online MLM is a form of obtaining membership fees by using virtual procts such as point cards and video advertisements. In today's society, this way of pyramid selling is the most common, and it is impossible to prevent. For this kind of MLM, we should focus on prevention
5. Legal MLM enterprises, which are approved by the government to operate in the offline mode, are generally relatively large, and their procts can be consumed normally. If you charge a certain franchise fee, you can operate independently or jointly. For example, some cosmetics, some chain stores, logistics and express companies< 6. It is a non-governmental organization that has no profit in MLM and develops in the way of pulling down the line, but does not take membership fee as the profit purpose. Like a religious organization
How can we prevent pyramid selling in the process of employment and part-time jobs< First, don't believe that pie falls from the sky. The most commonly used words of MLM companies are "let you make money while consuming". This is nonsense. Consumption is consumption, and making money is making money. Take consumption as a profession and never make money
Second, there is a rule in the business world, that is, all relationships are established by signing contracts. Contract is a necessary tool to ensure equality and mutual benefit between both parties. In particular, the company and the indivial labor relations, China's labor contract law, is to sign a contract, regular companies will take the initiative to sign a contract with you. If the other party doesn't talk about the contract at all, or even refuses to sign the contract, then he must be sincere and stay away from him< 3. Don't be sentimental. MLM companies usually find acquaintances from acquaintances. There is a saying that friends don't talk business. There is a certain truth in this. Don't hurt yourself because of your friends' feelings. Some people, as long as their friends invite them, don't ask for anything and follow them. As a result, they fall into a dilemma and can't extricate themselves< 4. Examination of qualification. Whether you want to join a company or accept a company's sales promotion, you should first understand a company's qualification and credit
to say no to illegal pyramid schemes, you, me and him are needed.
what attracts more attention is that the proponents of the concepts of "learning ledger" and "ecation blockchain" claim that they can track and record the real-time income of learners, so as to analyze and determine which knowledge, skills, courses or majors can bring more rewards to learners, so as to provide advice and guidance for later learners; Learners themselves can also use the "learning account book" to seek sponsors who are willing to invest in their learning. The principle behind this is that the "learning account book" can track and record the rewards that learners get through each ecation blockchain, so the sponsors can ask for a certain proportion of the learners' income as their return on investment, The protocol between learners and investors is managed by smart contract. Like bitcoin's technology foundation, "learning ledger" is also built on blockchain technology, which means that every ecation blockchain acquired by learners will become an eternal record of knowledge and skills that are constantly increasing and will not be deleted on the "learning ledger"< br /> MOOCS and open ecation resource movement, which are born out of technological innovation, have and will continue to reconstruct the essence, connotation and boundary of ecation in the era of sharing economy, reshape the mission, function and organization mode of ecational institutions in the digital era, and promote the reform of teaching philosophy, content and mode in the teaching environment of technology empowerment. The development and application of blockchain technology has created a new technical basis and practice mode for the reform of ecation and teaching.
because he has many participants (content creators, ecational institutions, learners and consumers), he also has many problems, such as uneven content quality, hidden charges and so on. Ecational institutions have to bear high marketing costs, while parents have to bear the unbearable tuition fees
in specific application fields, Internet technology has given birth to online learning, live video and other means of touch and interaction. The blockchain can make unified records and mechanisms for knowledge content procers, learners' participation, and promoters' promotion effect in the community, so that each participant can be motivated. Specifically, you can refer to two projects: livee (online learning) in the United States and ekt (ecation public chain and ecation marketing related) released by ecare foundation in Singapore. Different entrepreneurs have different entry points
in short, ecation instry is a long tail instry, which needs in-depth research and practical implementation.
many fields are using this concept to promote
blockchain is divided into public chain, private chain and alliance chain
the real reconstruction is private, so as to ensure that it will not be changed, but it is too difficult
The two-dimensional structure of the vertical mill is mainly composed of two parts: the cylinder and the guide plate. The guide plate is fixed on the feeding hollow shaft tube. The supporting arm connecting the guide plate and the hollow shaft tube is omitted in the figure. The guide plate is static when it works, and the cylinder rotates at a certain angular speed to drive the pulp flow in the cylinder. The rotation direction of the cylinder is counter clockwise
because the whole model is composed of some simple geometric bodies, the use of structured grid in the calculation process of the mill can effectively improve the calculation efficiency and accuracy. In the two-dimensional problem, the mesh types include triangle, quadrilateral and mixed element combination. Considering the initialization time, computational cost and numerical dissipation, the quadrilateral mesh is selected and the model is divided into 8330 meshes
as the flow field of the vertical mill is unsteady, the sliding grid model is selected to calculate the flow field, the non confluent solver is selected, and the simple algorithm is used to solve the velocity pressure field
is the full vector distribution diagram of the cross-section velocity of the mill when the mill speed is 250r / min after 1000 second iteration. The velocity unit in the diagram is m / s, from which the flow direction of the fluid in the mill cylinder can be seen. Under the action of the guide plate, the fluid which moves centrifugally close to the cylinder changes its trajectory. One part of the fluid continues to move centrifugally, and the other part makes a linear impact motion along the inner surface of the guide plate. From the color shown in the figure, we can see the velocity gradient of the flow field. The farther away from the center of the cylinder, the greater the fluid velocity is, and the closer to the center of the cylinder, the smaller the fluid velocity is. It can be seen that the whole flow field is actually a large vortex, which is damaged by the guide plate, and can be regarded as a kind of disturbed axisymmetric vortex with axial flow. When the speed is high, most of the inner region of the vortex is hollow. Therefore, the main grinding area of the mill lies in the annular zone far away from the center of the cylinder and near the wall of the cylinder. The forces generated in this area include extrusion force, shear force and impact force, which are the main forces for grinding effect. The crusher generally deals with large pieces of material, and the particle size of the proct is coarse, usually larger than 8 mm. Its structural feature is that there is a certain gap between the broken parts and they do not contact each other. Crusher can be divided into coarse crusher, medium crusher and fine crusher
crushers mainly include jaw crusher, cone crusher, impact crusher, impact crusher (sand making machine), hammer crusher, counter roller crusher, etc; 1、 Jaw crusher
the main structure of jaw crusher includes frame, eccentric shaft, large belt pulley, flywheel, side guard plate, elbow plate, back seat of elbow plate, clearance adjusting screw, return spring, fixed jaw plate and moving jaw plate, etc
when working, the motor drives the belt and pulley to make the moving jaw move up and down through the eccentric shaft. When the moving jaw rises, the angle between the elbow plate and the moving jaw becomes larger, so as to push the moving jaw plate closer to the fixed jaw plate. At the same time, the material is crushed by extrusion, rubbing, grinding and other multiple crushing; When the moving jaw goes down, the angle between the elbow plate and the moving jaw becomes smaller, the moving jaw plate leaves the fixed jaw plate under the action of the pull rod and the spring, and the crushed materials are discharged freely through the discharge port at the lower part of the jaw cavity under the action of gravity. Therefore, the jaw crusher works intermittently, and the crushing and discharging processes are carried out alternately in the jaw cavity. With the continuous rotation of the motor, the jaw of the crusher makes periodic crushing and discharging to realize mass proction< The cone crusher is mainly composed of frame, belt pulley, horizontal shaft, eccentric sleeve, upper crushing wall (fixed cone), lower crushing wall (moving cone), hydraulic coupling, lubrication system and control system
its moving cone is fixed on a suspended vertical axis, which is placed in an eccentric sleeve on the horizontal axis. When working, the motor drives the belt pulley or coupling to rotate, so as to force the moving cone to swing along the inner surface of the fixed cone through the horizontal axis, eccentric sleeve and hanging vertical axis. When the moving cone is close to the fixed cone, the material is crushed by the extrusion, impact and bending of the moving cone, forming a crushing cavity; Where the moving cone deviates from the fixed cone, the broken material is discharged from the bottom of the cone under the action of self weight. Crusher through continuous work to achieve continuous crushing of stone< The main structure of impact crusher is: frame, rotor, hammer, impact plate, side guard plate, etc
under the drive of the motor, the rotor rotates at a high speed. When the material enters the action area of the plate hammer, it collides with the plate hammer on the rotor and then is thrown to the impact device for crushing again. The ore bounced back by the impact plate collides with the plate hammer or other ore thrown out behind the rotor, so the ore in the first crushing chamber is repeatedly impacted and crushed. After crushing to a certain size in the first crushing chamber, some ores are discharged into the second crushing chamber through the gap between the impact plate and the rotor, and continue to be hit repeatedly until they reach the ideal size before they are discharged from the bottom discharge port of the crusher< 4. Impact crusher (sand making machine)
the impact crusher is composed of seven parts: feeding hopper, distributor, whirling crushing chamber, impeller body, main shaft assembly, base transmission device and motor. The principle of stone striking is adopted to make more materials collide and crush by themselves
the material enters the sand making machine from the feeding hopper, and is divided into two parts by the distributor. One part enters the high-speed rotating impeller from the middle of the distributor, and is rapidly accelerated in the impeller, which can reach hundreds of times of the acceleration of gravity, and then ejected from the three evenly distributed channels of the impeller at the speed of 60-70 M / s, First of all, a part of the material collected from around the distributor is impacted and broken, and then it impacts on the material lining in the whirling chamber together. It is rebounded by the material lining, and then it impacts obliquely upward to the top of the whirling chamber. After reflection, it deflects and moves downward, and then it collides with the material emitted from the impeller again. In this way, a piece of material is impacted twice or more in the whirling crushing chamber Friction and grinding crushing, and finally the material lost energy is discharged from the crushing cavity. In the whole crushing process, the materials are self impacted and crushed, not in direct contact with the metal components, but in impact and friction with the material lining, which greatly reces the wear of the equipment and prolongs the service life of the machine. At the same time, the ingenious self circulation of air flow in the vortex chamber also eliminates the st pollution to the maximum extent. Generally speaking, the material processed by the mill is fine, and the particle size of the proct is fine, up to 0. 074 mm, even thinner. Its structural feature is that the crushing parts (or medium) contact each other, and the medium used is steel ball, steel bar, gravel or ore block. But some machines have the function of crushing and grinding at the same time, such as autogenous mill. ∮5 five × 1 The upper limit of particle size of ore processed by 8m autogenous mill can reach 350-400mm, and the fineness of proct can reach - 200 mesh, accounting for about 40%
mills mainly include: Raymond mill, high-pressure mill, ladder mill, medium speed mill, vertical roller mill, ball mill, air flow mill, etc