Ha Yu mining CPU only half running
1. At present, most currencies are linked in US dollars
2 the effect of direct hedging is better,
3 the hedging currency group; Non US currency, gold, silver, Euro American pound, US, Australia US, hedge currency, US Japan, US Canada, US Switzerland
for hedging in Europe and the United States, choose the United States and Japan, and at the same time, the same direction and the same amount
is there no hedging in the same currency? What you mean is lock in.
warm tips:
1. The withdrawal of self-service machines and tools is limited by single and daily accumulated amount
2. The support business of self-service machines and tools varies in different regions. Please refer to the machine page for specific functions and operations
(answer time: June 13, 2019, in case of business change, please refer to the actual situation.)
Theoretically, the friction coefficient of linear guide is between 0.01 and 0.02, but in practical application, e to the parallelism of installation, the pre tightening adopted to eliminate the clearance, the curve distortion of ball returning device (reflected at high speed), the consistency of inner and outer raceways and other factors are too uncontrollable. It is often much larger than the theoretical value. It is suggested that the accounting should be based on 0.15
calculation formula:
for the linear rolling guide with roller, the rated life is:
in the calculation formula of friction coefficient of linear guide,
L: rated life.km
C: basic rated dynamic load, kn
PC: calculated load, LN
Fh: hardness coefficient
ft: temperature coefficient
FC: Contact coefficient,
FW: load coefficient
It can be seen from the above two formulas that the rated life of linear rolling guide is directly affected by hardness coefficient FH, temperature coefficient ft, contact coefficient FC and load coefficient FWhardness coefficient
in order to give full play to the excellent performance of linear rolling guide, the guide surface contacting with steel ball or roller should have hrc58-64 hardness from surface to appropriate depth. If the required hardness is not reached for some reason, the service life will be shortened. During calculation, the basic rated dynamic load C shall be multiplied by the hardness coefficient FH
temperature coefficient
when the working temperature of the linear rolling guide exceeds 100 ℃, the hardness of the guide surface will decrease, and the service life will be shortened compared with that under normal temperature. In the calculation, the basic rated dynamic load C shall be multiplied by the temperature coefficient ft
At the same time, the change of material size and different lubrication methods should be considered when operating at high temperature When calculating the load acting on the linear rolling guide, it is necessary to correctly calculate the load caused by the weight of the object, including the inertia load caused by the change of movement speed and the torque load caused by the suspension part. In addition, the machine tool in reciprocating motion, often accompanied by vibration and shock, especially in the high-speed movement of the vibration and normal work e to repeated start, stop and other operations caused by the impact, often difficult to calculate correctly. Therefore, the basic rated dynamic load C should be multiplied by the empirical load factor FW as shown in Table 2contact coefficient
in most cases, in order to achieve linear motion, at least two rolling sliders should be installed on the guide rail. However, the load imposed on each slider is affected by the installation accuracy and the accuracy of the slider itself, which is not necessarily equal to the calculated value. Therefore, the basic rated dynamic load C should be multiplied by the contact coefficient FC shown in Table 1 in the life calculation
mine, don't dig in other areas. Although the demand for these mines is good, the price is not flattering. Except for krypton
it is recommended to dig silver ore and silver ore. these two kinds of mines have good cost performance, and if no one grabs them, they will be very efficient. I believe many people will grab the mines in Outland
It is necessary to issue the transfer letter issued by the employer with relevant qualifications. Because the talent market is based on the file transfer letter, the file transfer letter is generally issued by the human resources department of the unit
the second thing you need is a registration card, which says the registration unit. The government's talent market accepts files according to the registration certificate. Those who do not have the registration certificate do not have the graation qualification. Without the graation qualification, they can not enjoy the confirmation and management of cadre files in the talent market. Next is the personal ID card, to confirm that the file is really my own
it should be noted that people who go to the company to keep files can only open a file transfer letter from the office center. As long as there is a file transfer letter, an ID card and a graation certificate, the file can be collected by someone
extended data:
importance of personal file
personal file is the abbreviation of a person's life track, is a very important information for employers to understand a person's situation, is also an important part of a person's political career, can not be underestimated and ignored
as long as a person needs to work and live, he can't do without dealing with some units, departments and organizations in the society. The establishment of personal files is not only the need of work, but also the need of the society, but also the need of a person's work and life in the society, which is an important means for units or enterprises to understand a person. Of course, people without archives will not be easy for units or enterprises to understand you, which is definitely unfavorable to indivials. Storage and safekeeping is of course an important link