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How much does the blockchain mall cost
Publish: 2021-05-24 01:14:55
1. There is no answer to this question, because blockchain software is only a large field, which needs specific analysis. Asking this question is like asking how much to buy a house
blockchain software can be divided into many kinds
for example, exchanges are the most popular, from tens of thousands of simple to hundreds of thousands of full-featured
and blockchain games, depending on the game settings, generally from hundreds of thousands to hundreds of thousands
the rest depends on the category.
blockchain software can be divided into many kinds
for example, exchanges are the most popular, from tens of thousands of simple to hundreds of thousands of full-featured
and blockchain games, depending on the game settings, generally from hundreds of thousands to hundreds of thousands
the rest depends on the category.
2. It also depends on what kind of blockchain app you develop. A simple one can be done with thousands of yuan, and a complex one can be done with tens of thousands or even hundreds of thousands of yuan
3. As we all know, there are many blockchain projects. The common ones are: mobile phone mining, digital currency development (token), digital currency exchange, digital currency wallet, blockchain mall, blockchain pet cultivation, blockchain games...
blockchain development needs to be determined according to the development methods and functions. Customized development is expensive, and it will be very expensive if there are many and complex functions, Therefore, this specific price can only be expressed in a specific scheme.
blockchain development needs to be determined according to the development methods and functions. Customized development is expensive, and it will be very expensive if there are many and complex functions, Therefore, this specific price can only be expressed in a specific scheme.
4. Blockchain development is a promising instry. Many companies are doing blockchain development. Shenzhen Shengshi Huacai is very professional. I suggest you consult Shengshi Huacai in detail.
5. How much does it cost to develop a blockchain application? For example, blockchain digital wallet
there are many kinds of blockchain digital wallet apps. For example, online applications can be divided into many kinds, including full node wallet, light wallet and centralized wallet. In addition, they can be divided into single chain wallet and Multi Chain Wallet, while offline applications can be divided into paper wallet and hardware Wallet
the development costs of different types of blockchain digital wallets are very different. For example, the development costs of single chain wallets and Multi Chain wallets are different because of the different system types used in the development. It can be known that the development of Multi Chain wallets is more difficult, because the quotation will be much higher than that of single chain wallets.
there are many kinds of blockchain digital wallet apps. For example, online applications can be divided into many kinds, including full node wallet, light wallet and centralized wallet. In addition, they can be divided into single chain wallet and Multi Chain Wallet, while offline applications can be divided into paper wallet and hardware Wallet
the development costs of different types of blockchain digital wallets are very different. For example, the development costs of single chain wallets and Multi Chain wallets are different because of the different system types used in the development. It can be known that the development of Multi Chain wallets is more difficult, because the quotation will be much higher than that of single chain wallets.
6. There are too many factors that affect the price. For example, different companies may set different prices, and the complexity of software functions may also affect the price. Then there are development cycles, extended functions and so on. I don't think you will get a satisfactory answer if you don't have in-depth communication with blockchain app development companies.
7. Ask customer service, we are not professional
8. It's going to have an impact
9. When the mussel is feeding on the seabed, the shell opens, and foreign bodies such as sand particles and parasites occasionally fall into it. When the mantle is stimulated, it will secrete nacre, wrap the falling foreign bodies layer by layer, make them smooth, and graally form a bright and moist outer layer of the pearl sac. Pearl culture is based on this principle, the application of nuclear technology will be implanted into the round pearl mussel, pearl will be formed
it is generally believed that the mantle epidermal cells of mussels are stimulated by a certain stimulus and proliferate rapidly, graally covering the stimulus source to form a complete nacre sac, and graally secreting nacre layer by layer with the stimulus source as the center to form pearls. Therefore, the Pearl formed is spherical or non spherical, the crux is whether the pearl can be evenly accumulated around the stimulation source, and it can not be raised without certain professional level and breeding experience. After all, it is different from pet
(1) the water area type of pearl culture, the living environment of pearl mussel is water area, The quality of water environment directly affects the growth of pearl oyster and pearl breeding
generally speaking, pearl can be cultured in any water area where fish can be cultured
2) the water conditions of pearl culture include water depth, water flow, water pH, inorganic salt and food organisms
1. The water depth of pearl culture is 1.5-3m
2. The water flow with a certain speed is of great significance for the growth of pearl oyster and the breeding of pearl. Hyriopsis cumingii grew well in the river with smooth flow. The proction practice has proved that the luster of Pearl bred in flowing water is better than that in still water, and the yield is also higher
3. The water with neutral pH value (ph7-7.5) is most suitable for the growth and secretion of nacre. The pH value of most fresh water is 6.5-8.5; The hard water is alkaline. The growth and survival of Hyriopsis cumingii will be affected if the pH value exceeds a certain limit. If it is acidic, it can be neutralized by lime water; If it is alkaline, it can be changed by applying organic fertilizer
4. Inorganic salt water is a good solvent, there are many kinds of inorganic salts dissolved in water. These salts have direct and indirect effects on the growth and pearl formation of Hyriopsis cumingii. Calcium is the main component (in the form of calcium carbonate) of oyster shells and pearls. Therefore, a certain amount of calcium is required in the breeding place of pearl mussel, generally more than 10 mg per liter. In addition, there are magnesium, silicon, manganese, iron, etc., which are required to have a certain content
5. Food organisms are the material basis for the survival of pearl mussel. With abundant food organisms in the water, the pearl mussel grows well because of its rich nutrition, so the Pearl grows fast and has high quality. The main food organisms are phytoplankton and zooplankton. Hyriopsis cumingii mainly feeds on diatoms, protozoa and organic debris. The content of plankton and sediment debris in water determines the water color and transparency. From the color of the water, we can estimate the number of food organisms in the water. There are many food organisms, low transparency and deep water color. Generally, the yellow green water is the most suitable for breeding pearl mussels. The transparency of aquaculture water area is 30 cm
6. Illumination and ventilation illumination are one of the main environmental factors. Light directly proces heat effect, which provides energy source for the survival of pearl mussel and food organisms; Light affects the physical and chemical properties of water environment; Light plays an important role in the color, reproction and behavior of pearl mussels, and it is also beneficial to enrich the luster of pearls. The wind blows and fluctuates. In a well ventilated environment, the water wave increases the dissolved oxygen in the water and promotes the movement of the upper and lower water masses and the heat transfer
7. There is a close relationship between water temperature and biological metabolism. The growth, development, reproction and distribution of pearl oyster are directly affected and controlled by the water temperature, and the formation and growth of pearl are also restricted by the water temperature
(1) the optimal temperature range: 15-30 ℃: in this temperature range, the growth and development of pearl mussel is normal, the secretion of nacre is vigorous, and the growth of pearl is fast
(2) the lowest temperature is below 10 ℃: below this temperature, the metabolism of pearl oyster is stagnant, the activity is weak, and the secretion of nacre is basically stopped
(3) the highest temperature -- above 35 ℃: when the temperature exceeds 35 ℃, the growth of Hyriopsis cumingii is hindered, and the metabolism of alienation is greater than assimilation, resulting in the decline or death of Hyriopsis cumingii; At the same time, high temperature caused anoxia and suffocation
there should be no vascular plants at the bottom of aquaculture waters, because aquatic plants compete with food organisms for inorganic salts and proce toxic substances after plants die, which affects the growth of pearl mussel. If pearl mussels are cultured in waters with aquatic vascular plants, they should be removed
3) the management of pearl culture period, pearl culture time is relatively long, generally after 2-3 years of culture can be harvested. In the whole breeding process, we should take various effective measures to create good environmental conditions and cultivate high-yield and high-quality pearls. The main management work can be divided into the following aspects< (1) after operation, most of the mussels were weak and needed half a month to a month to recuperate. After wound healing, they returned to normal physiological activities. Within one month after the operation, the management should be very careful
(2) ring the culture period, e to the large-scale propagation of aquatic algae, there are often a large number of algae attached to the cage, which hinders the smooth flow of water and affects the feeding of pearl mussel. At the same time, a large number of algae are often attached to the shell of Hyriopsis cumingii, which affects the growth of Hyriopsis cumingii. Therefore, ring the breeding period, the attachments on the cage and shell should be removed regularly, and weeds in the water should be removed to keep the water clean
(3) adjusting the water level and water temperature requires adjusting the breeding depth of pearl mussel. The depth of hanging should change with the change of seasonal temperature: in winter and summer, the depth of hanging should be deeper to prevent the adverse effects of cold and heat. In summer, it is about one foot above the water surface. In winter, it is better to reach the bottom of the river without touching the mud. In spring and autumn, it can be placed shallower to strengthen the light and promote the formation and growth of pearls< (4) water quality management water quality management mainly refers to the cultivation of fertilizer and water in aquaculture waters, because it is an important factor to obtain high quality and high yield of pearls. Fertile water quality is the only way to cultivate abundant food organisms for pearl mussels. In order to improve the proction capacity of pearl growing water, proper fertilization is needed
in spring, the water temperature is graally rising, the metabolism of pearl oyster is becoming more and more vigorous, the nacre begins to deposit, and the food demand is increasing. Organic fertilizer and water should be applied to cultivate food organisms to meet the growth and development needs of pearl oyster. 4、 May is the sexual maturity period of Hyriopsis cumingii, which needs more nutrients. Organic fertilizers include pig manure, cattle manure, sheep manure, human manure and green manure. In summer, in order to prevent the consumption of oxygen in water by organic fertilizer fermentation, inorganic fertilizer and nitrogen and phosphorus fertilizer should be applied, and the general ratio is 2:1. In autumn, the water temperature decreases graally, so some organic fertilizer can be applied in combination with inorganic fertilizer. In the late autumn, more organic fertilizer should be applied to ensure enough food for the pearl mussel before overwintering. Fertilization should be carried out in sunny days. The amount of fertilizer application depends on the water quality. The principle is to improve the water quality and fertilizer level step by step, so that the pearl mussel breeding has an adaptive process. Organic fertilizer is applied around the water area, or around the pearl mussel, or suspended in the water in the basket, so that it can slowly dissolve in the water. Never apply fertilizer on the mussel to avoid unnecessary losses; Inorganic fertilizer is best dissolved in water and then applied
4) pearl harvesting is not only the last work of pearl proction cycle, but also the harvest time of hard-working fruit of Pearl workers
(1) the culture cycle of pearl mussel is generally 2-3 years. In terms of the formation process of Seedless pearl, the growth rate was the fastest from the second to the third year. After the fourth year, the growth rate decreased, and the Pearl Oyster graally weakened and was easy to die. The pearls cultured for 2-3 years are large, round, glossy and of high quality. For more than three years, although the particles are large, the luster is not good and the quality is not high< (2) the harvest season of pearls is usually after the autumn of the last year of the growing season, that is, October to December, and it is best to harvest pearls around February of the next year
(3) the method of Pearl harvesting is often used to kill mussels. When collecting pearls, take the oyster out of the water, clean the sludge and other attachments on the shell, cut off the front and rear adctor muscles, and pinch the pearls with hands
(4) after the pearl is harvested, the collected pearl should be treated immediately, because there are body fluid and dirt on the surface of the collected pearl. If it is kept for a long time, the luster of the Pearl will be dim and the quality will be affected
after the pearl is harvested, first wash it with water, then soak it in saturated salt water for 5-10 minutes, remove the body fluid and dirt on the pearl surface with cloth, then wash it with soapy water (it is better to use alkaline soap), rinse it with water, finally polish it with flannelette or soft towel, and dry it in the air. If you want to damage the luster of pearls by washing them with soapy water, you'd better wash them with 0.15-0.2% sodium Dodecanoate (soak overnight)
it is generally believed that the mantle epidermal cells of mussels are stimulated by a certain stimulus and proliferate rapidly, graally covering the stimulus source to form a complete nacre sac, and graally secreting nacre layer by layer with the stimulus source as the center to form pearls. Therefore, the Pearl formed is spherical or non spherical, the crux is whether the pearl can be evenly accumulated around the stimulation source, and it can not be raised without certain professional level and breeding experience. After all, it is different from pet
(1) the water area type of pearl culture, the living environment of pearl mussel is water area, The quality of water environment directly affects the growth of pearl oyster and pearl breeding
generally speaking, pearl can be cultured in any water area where fish can be cultured
2) the water conditions of pearl culture include water depth, water flow, water pH, inorganic salt and food organisms
1. The water depth of pearl culture is 1.5-3m
2. The water flow with a certain speed is of great significance for the growth of pearl oyster and the breeding of pearl. Hyriopsis cumingii grew well in the river with smooth flow. The proction practice has proved that the luster of Pearl bred in flowing water is better than that in still water, and the yield is also higher
3. The water with neutral pH value (ph7-7.5) is most suitable for the growth and secretion of nacre. The pH value of most fresh water is 6.5-8.5; The hard water is alkaline. The growth and survival of Hyriopsis cumingii will be affected if the pH value exceeds a certain limit. If it is acidic, it can be neutralized by lime water; If it is alkaline, it can be changed by applying organic fertilizer
4. Inorganic salt water is a good solvent, there are many kinds of inorganic salts dissolved in water. These salts have direct and indirect effects on the growth and pearl formation of Hyriopsis cumingii. Calcium is the main component (in the form of calcium carbonate) of oyster shells and pearls. Therefore, a certain amount of calcium is required in the breeding place of pearl mussel, generally more than 10 mg per liter. In addition, there are magnesium, silicon, manganese, iron, etc., which are required to have a certain content
5. Food organisms are the material basis for the survival of pearl mussel. With abundant food organisms in the water, the pearl mussel grows well because of its rich nutrition, so the Pearl grows fast and has high quality. The main food organisms are phytoplankton and zooplankton. Hyriopsis cumingii mainly feeds on diatoms, protozoa and organic debris. The content of plankton and sediment debris in water determines the water color and transparency. From the color of the water, we can estimate the number of food organisms in the water. There are many food organisms, low transparency and deep water color. Generally, the yellow green water is the most suitable for breeding pearl mussels. The transparency of aquaculture water area is 30 cm
6. Illumination and ventilation illumination are one of the main environmental factors. Light directly proces heat effect, which provides energy source for the survival of pearl mussel and food organisms; Light affects the physical and chemical properties of water environment; Light plays an important role in the color, reproction and behavior of pearl mussels, and it is also beneficial to enrich the luster of pearls. The wind blows and fluctuates. In a well ventilated environment, the water wave increases the dissolved oxygen in the water and promotes the movement of the upper and lower water masses and the heat transfer
7. There is a close relationship between water temperature and biological metabolism. The growth, development, reproction and distribution of pearl oyster are directly affected and controlled by the water temperature, and the formation and growth of pearl are also restricted by the water temperature
(1) the optimal temperature range: 15-30 ℃: in this temperature range, the growth and development of pearl mussel is normal, the secretion of nacre is vigorous, and the growth of pearl is fast
(2) the lowest temperature is below 10 ℃: below this temperature, the metabolism of pearl oyster is stagnant, the activity is weak, and the secretion of nacre is basically stopped
(3) the highest temperature -- above 35 ℃: when the temperature exceeds 35 ℃, the growth of Hyriopsis cumingii is hindered, and the metabolism of alienation is greater than assimilation, resulting in the decline or death of Hyriopsis cumingii; At the same time, high temperature caused anoxia and suffocation
there should be no vascular plants at the bottom of aquaculture waters, because aquatic plants compete with food organisms for inorganic salts and proce toxic substances after plants die, which affects the growth of pearl mussel. If pearl mussels are cultured in waters with aquatic vascular plants, they should be removed
3) the management of pearl culture period, pearl culture time is relatively long, generally after 2-3 years of culture can be harvested. In the whole breeding process, we should take various effective measures to create good environmental conditions and cultivate high-yield and high-quality pearls. The main management work can be divided into the following aspects< (1) after operation, most of the mussels were weak and needed half a month to a month to recuperate. After wound healing, they returned to normal physiological activities. Within one month after the operation, the management should be very careful
(2) ring the culture period, e to the large-scale propagation of aquatic algae, there are often a large number of algae attached to the cage, which hinders the smooth flow of water and affects the feeding of pearl mussel. At the same time, a large number of algae are often attached to the shell of Hyriopsis cumingii, which affects the growth of Hyriopsis cumingii. Therefore, ring the breeding period, the attachments on the cage and shell should be removed regularly, and weeds in the water should be removed to keep the water clean
(3) adjusting the water level and water temperature requires adjusting the breeding depth of pearl mussel. The depth of hanging should change with the change of seasonal temperature: in winter and summer, the depth of hanging should be deeper to prevent the adverse effects of cold and heat. In summer, it is about one foot above the water surface. In winter, it is better to reach the bottom of the river without touching the mud. In spring and autumn, it can be placed shallower to strengthen the light and promote the formation and growth of pearls< (4) water quality management water quality management mainly refers to the cultivation of fertilizer and water in aquaculture waters, because it is an important factor to obtain high quality and high yield of pearls. Fertile water quality is the only way to cultivate abundant food organisms for pearl mussels. In order to improve the proction capacity of pearl growing water, proper fertilization is needed
in spring, the water temperature is graally rising, the metabolism of pearl oyster is becoming more and more vigorous, the nacre begins to deposit, and the food demand is increasing. Organic fertilizer and water should be applied to cultivate food organisms to meet the growth and development needs of pearl oyster. 4、 May is the sexual maturity period of Hyriopsis cumingii, which needs more nutrients. Organic fertilizers include pig manure, cattle manure, sheep manure, human manure and green manure. In summer, in order to prevent the consumption of oxygen in water by organic fertilizer fermentation, inorganic fertilizer and nitrogen and phosphorus fertilizer should be applied, and the general ratio is 2:1. In autumn, the water temperature decreases graally, so some organic fertilizer can be applied in combination with inorganic fertilizer. In the late autumn, more organic fertilizer should be applied to ensure enough food for the pearl mussel before overwintering. Fertilization should be carried out in sunny days. The amount of fertilizer application depends on the water quality. The principle is to improve the water quality and fertilizer level step by step, so that the pearl mussel breeding has an adaptive process. Organic fertilizer is applied around the water area, or around the pearl mussel, or suspended in the water in the basket, so that it can slowly dissolve in the water. Never apply fertilizer on the mussel to avoid unnecessary losses; Inorganic fertilizer is best dissolved in water and then applied
4) pearl harvesting is not only the last work of pearl proction cycle, but also the harvest time of hard-working fruit of Pearl workers
(1) the culture cycle of pearl mussel is generally 2-3 years. In terms of the formation process of Seedless pearl, the growth rate was the fastest from the second to the third year. After the fourth year, the growth rate decreased, and the Pearl Oyster graally weakened and was easy to die. The pearls cultured for 2-3 years are large, round, glossy and of high quality. For more than three years, although the particles are large, the luster is not good and the quality is not high< (2) the harvest season of pearls is usually after the autumn of the last year of the growing season, that is, October to December, and it is best to harvest pearls around February of the next year
(3) the method of Pearl harvesting is often used to kill mussels. When collecting pearls, take the oyster out of the water, clean the sludge and other attachments on the shell, cut off the front and rear adctor muscles, and pinch the pearls with hands
(4) after the pearl is harvested, the collected pearl should be treated immediately, because there are body fluid and dirt on the surface of the collected pearl. If it is kept for a long time, the luster of the Pearl will be dim and the quality will be affected
after the pearl is harvested, first wash it with water, then soak it in saturated salt water for 5-10 minutes, remove the body fluid and dirt on the pearl surface with cloth, then wash it with soapy water (it is better to use alkaline soap), rinse it with water, finally polish it with flannelette or soft towel, and dry it in the air. If you want to damage the luster of pearls by washing them with soapy water, you'd better wash them with 0.15-0.2% sodium Dodecanoate (soak overnight)
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