Gravity zone division in some countries Italy and Germany have stipulated the gravity zone in the national metrology regulations in 1994 and 1995, respectively. These regulations enable weighing instrument measurement and equipment manufacturers to directly use one, two or The average gravitational acceleration value of several gravitational zones correctly adjusts the scale. At the same time, Austria also made a corresponding division of gravity. Since the relative change in global gravity is relatively small, a sufficiently large gravity zone can be determined. When the height h is the same, the maximum change of the gravity acceleration value $ g (that is, the difference between the gravity of the poles and the equator) is about. At the same geographic latitude U, the gravity acceleration value decreases with the increase of the height h, and decreases every 1000m 2. Therefore, the gravity zone is mainly for those countries or regions with a large distance between north and south or uneven terrain. The European Organization for Legal Metrology established a unified gravity zone in 2000.
The size and number of gravity zones depend on the maximum allowable error of the scale when moving in the gravity zone, that is, the maximum variation range of the gravity acceleration value of the gravity zone. Germany and Italy use the following formula to determine the range of gravitational acceleration in the gravity zone: where: $ g / g is the relative allowable change of the gravitational acceleration in the gravitational zone, e is the maximum allowable error of the weighing instrument concerned, n is the weighing instrument verification The number of division values ​​e (n = maximum range divided by the verification division value, e is usually equal to the digital resolution d). Since the provinces of Germany and Italy span a small latitude, they divide the gravity zone according to administrative boundaries.
The European New Gravity Zone established by the European Legal Metrology Cooperation Organization is applicable to countries that have been established or not. The new gravity zone has nothing to do with politics and national boundaries. The basis for its establishment is: 1) An independent gravity zone is determined for the weighing instrument, which is only related to the physical influence factors U and h and the accuracy of the weighing instrument; 2) The reference gravity acceleration value g is calculated by the standard gravity calculation formula, which is Used as the basis for weighing instrument adjustment; 3) Use the same criterion to calculate the maximum relative allowable error of the gravity acceleration value in the gravity zone, that is, the criterion is three times stricter than that of the German and Italian standards, and the range of the gravity zone is better than that of the German and Italian The outgoing gravity zone is obviously smaller.
Nervos is an ambitious newcomer on the crypto market and Changelly has long watched it with interest. The project attracted the attention of investors and developers since its purpose is not to launch another cryptocurrency in the ecosystem. Nervos is a simple connecting database between any blockchains.
Nervos was launched in November 2019 by Nervos Network and aims to fix issues that plague both Bitcoin and Ethereum. Among them are scalability and value differences. To fix them, the Nervos team wants to implement effective scalability and raise the cost of their token by hosting other cryptocurrencies on their blockchain. Nervos supports smart contracts and is censorship-resistant. CKB is a native token of the Nervos network. It scales with the value of other assets stored on the network: the more cryptos and tokens are there, the more valuable CKB becomes. This means that this token will continue raising its value the more attention and assets it attracts. Add to that the support of smart contracts, and you have a nice crypto bridge between different blockchains. Which is exactly what makes it so attractive for both crypto enthusiasts and investors.
ckb mining machine,eaglesong algorythm,ckb miner,goldshel ck6,goldshell ck5
Shenzhen YLHM Technology Co., Ltd. , https://www.ylhm-tech.com