B3 has low computational power

1.

bitcoin was obtained by CPU in the early days. With the continuous development of GPU speed and the emerging advantages of GPU general computing, miners graally began to use GPU instead of CPU for mining. Bitcoin mining uses SHA-256 hash operation, which will carry out a large number of 32-bit integer cyclic right shift operation. Interestingly, this algorithm operation can be implemented by a single hardware instruction in AMD GPU, while it needs three hardware instructions to simulate in NVIDIA GPU. This one alone brings an additional 1.7 times of computing efficiency advantage for AMD GPU. With this advantage, amd GPU is favored by the majority of miners

advise the landlord not to dig up if the budget is not too much!!! This money is not earned if you want to

the difficulty of bitcoin is increasing. Mining with graphics card is a race against time. The main reason is that the difficulty of mining bitcoin is graally increasing (the reason of bitcoin algorithm design). If a set of platforms can get 1 bitcoin per day according to the current difficulty, then in one month, the platforms with the same computing power will only get 0.8 bitcoins, even the top graphics cards will get 18.2 days (which can't be shut down), and the lowest second-hand hd7750 will need more than 400 (it will take 214 days to get one). Just look at this figure (this is the data in May this year, Now it's more than 18 days)

people can earn money by buying several mining machines (mining machines with dozens of top graphics cards piled together)

I hope I can help you

2. Disease analysis:
in this case, we need to see what method is used,
Guidance:
if the examination results of small hospitals or pharmacies are not correct and feasible enough,

3. Vitamin B3 is widely found in animal and plant food, good sources for animal liver, kidney, lean meat, whole grains, beans, etc., milk, green leafy vegetables also have considerable content. Nicotinic acid is not only directly absorbed from food, but also transformed from tryptophan in the body. On average, 60 mg tryptophan can be transformed into 1 mg nicotinic acid. The recommended intake for alts is 12 mg / d
deficiency of vitamin B3 can cause leprosy
prodromal symptoms: weight loss, fatigue, poor memory, insomnia, etc. if not treated in time, dermatitis, diarrhea and dementia may occur
skin symptoms: typical symptoms are symmetrical dermatitis in the exposed parts of limbs, such as the back of hand, wrist, forearm, face, neck, dorsum of foot and ankle
digestive system symptoms: mainly include angular stomatitis, glossitis, diarrhea, etc. diarrhea is a typical symptom of the disease. In the early stage, patients often suffer from constipation, and then they often have diarrhea e to atrophy of digestive glands and enteritis, with different times
nervous system symptoms: rarely appear in the initial stage, and appear when skin and digestive system symptoms are obvious. Mild patients may have general fatigue, irritability, depression, forgetfulness and insomnia. Severe cases are manic, auditory hallucination, delirium, numbness, and even dementia
oral ulcer is not the lack of vitamin B3, but the prohibition of vitamin B3 in patients with ulcer disease. Lack of vitamin A can lead to night blindness, dry eye and dry skin; Vitamin D deficiency can lead to rickets; Deficiency of vitamin B1 can lead to beriberi; Lack of vitamin B2 can cause cheilitis, angular stomatitis, glossitis and scrotum inflammation; The lack of PP may lead to leprosy; Deficiency of vitamin B12 may lead to pernicious anemia; Vitamin C deficiency can lead to scurvy.

4. The design of B3 earplug is similar to JVC and Xiaomeng procts to some extent. The two moving coil units are arranged on a plane instead of leading out through independent cts. This kind of design has both advantages and disadvantages. The advantage is that it is relatively simple and easy to assemble, but it also has the problem of poor sound control. The price of B3 is not high, but there are too many competitors at this price. Besieged earplugs and Fido a63 are its strong competitors. Compared with them, B3 has three obvious advantages: one is the appearance, the other is the feeling of wearing, and the third is the materials for workmanship. Nothing else, but the tempered glass on the back of the cavity is the only one in the headset. As for sound, I can only say that each has its own advantages. B3 does not show the strength of other procts. B3's low frequency is different from others. It's a relaxed route. It's very atmospheric and has a good sound field, but it's less elastic and some big dynamics can't keep up. Although the cavity is not small, because it is a al cell, the size of the low-frequency cell will not be very large. It can be said that there are some inherent limitations on the cell, so it is reasonable that B3 low-frequency does not win by transient texture. B3's medium frequency is more prominent, the voice is very close, slightly tone dye, can obviously feel some sweet voice, for the friends who like popular voice, it is a good choice. The high-frequency extension is general, and it's not very bright, but it's not a big problem. For those ethereal style music works, the interpretation of B3 is quite right

generally speaking, as the first proct, B3 has certain potential. Try different combinations in a few days. The multi unit technology, especially the multi unit dynamic coil technology, is still immature. It is hoped that manufacturers can continue to innovate and make better procts. Also hope to choose to buy after Pro comparison. If my answer is useful to you, please give me a "good comment". I wish you a happy life and a good mood every day

5.

1： Grade: Hastelloy B-3 nickel molybdenum alloy

2: chemical composition: phosphorus P (≤ 0.03) sulfur s (≤ 0.03) nickel Ni (resial) molybdenum mo (27.0 ~ 32.0) cobalt CO (≤ 3.0) carbon C (≤ 0.05) tungsten w (≤ 3.0) iron Fe (1.0 ~ 3.0) manganese Mn (≤ 3.0) silicon Si (≤ 0.1) chromium Cr (1.0 ~ 3.0)

3: application scope:

Hastelloy B-3 alloy can be applied It is suitable for all previous uses of B-2 alloy. Like B-2 alloy, Hastelloy B-3 is not recommended for use in the presence of trivalent iron salts and bivalent copper salts, because these salts can cause rapid corrosion damage. When hydrochloric acid comes into contact with iron and copper, it will react with them to form trivalent iron salt and bivalent copper salt

Physical properties: density g / cm3 (9.22) melting point ℃ (1418) elastic molus GPA (216) resistivity μΩ&# 8226; M (137) hardness (94)

V: Overview: excellent resistance to various organic acid corrosion. Hastelloy B-3 alloy is a new member of Ni Mo alloy family. It has excellent corrosion resistance to hydrochloric acid at any temperature and concentration. At the same time, it also has good corrosion resistance for sulfuric acid, formic acid, phosphoric acid and other non oxidizing media. Moreover, e to the adjustment of its chemical composition, its thermal stability is greatly improved compared with the original Hastelloy B-2 alloy. B-3 alloy has high resistance to pitting corrosion, stress corrosion cracking, knife corrosion and HAZ corrosion

6. =IF((A1=B1)*(A2=B2),min(A3,B3),"")

7. The basic effects of vitamin B3 are as follows:
(1) it can help to rece cholesterol and triglyceride
(2) help metabolize fat, promote the health of digestive system, and rece gastrointestinal disorders
(3) make the skin more healthy< (4) prevention and relief of severe migraine
(5) promoting blood pressure circulation and lowering blood pressure
(6) rece diarrhea
(7) relieve the symptoms of Meniere's disease
(8) make full use of food to increase energy
(9) treat mouth and lip inflammation and prevent halitosis<

vitamin B3 deficiency:
(1) pellagra< (2) severe dermatitis
the main source of vitamin B3 -
it is widely distributed in animal food, liver, yeast, egg yolk, beans and vegetables< br /> http://iask.fh21.com.cn/question.php?id=987

8. 3b, BBB, is one of the credit grades. General credit rating is divided into: AAA, AA, a, BBB, BB, B, C, D (also use + for letters, such as a + + is equivalent to AAA)
BBB is generally the lowest level of investment grade (for bonds and stocks), while BBB is generally the lowest level of allowing new loans in the process of bank credit to enterprises. But different banks have different regulations.