Mining in MHW farm

1. The bus usually takes 55 minutes from Xiangshan passenger transport center to Ningbo East bus station, and it can be even faster to drive by yourself or to Yinzhou District.

2. The amount of data carried by any sensor network will increase with the complexity of network devices. Low end equipment can only transmit 1 bit increment data to indicate simple on / off status. The high-end sensor is not only intelligent, but also can transmit complex data type measured by byte. Many bit oriented instrial networks such as ASI, DeviceNet, interbus-s and BITBUS provide services for simple devices. At first, these sensor networks run at a simple level, but with the development of the times, more complex and characteristic devices are added to these networks. The addition of these devices improves the interoperability and intelligence of the network. For example, a single-chip microprocessor embedded in a limit switch can not only provide on and off status, but also contain complete cycle and device information
in order to meet the needs of more complex data communication, instry has begun to pay attention to other networks. For process control, someone will ask: can Ethernet TCP / IP replace part of the sensor network? Can part of the sensor network be integrated into a high-level Ethernet structure (for example, device net on Ethernet, interbus-s on Ethernet, LonWorks on Ethernet)? After considering the cost, applicability, performance and the support of the equipment supplier, we may get some answers to the above questions
the cost of Ethernet is not necessarily lower than other networks. In the foreseeable future, only when many sensors are concentrated in one Ethernet interface, can the cost be effectively reced
another cost factor is CPU resources. Here, Ethernet doesn't have much advantage over DeviceNet. For example, DeviceNet can run when the CPU has 4000 code bytes and 176 memory bytes. The minimum requirement of Ethernet is that CPU has 64000 code bytes and memory is 64000 bytes. However, many users still find that Ethernet requires at least 256Kb of CPU and memory, preferably 2-4mb of code and memory. If the sales volume is low and the price is high, some simple software will offset the requirement of Ethernet for more CPU. However, if the sales volume increases and the sales price decreases, devices like DeviceNet, which need lower resources, will not have price advantage under the same sales volume
considering the cost of line connection, especially for bit level sensors in instrial environment, people prefer the wiring form of ASI or DeviceNet. These sensor networks are more suitable for some sensor systems which are scattered within a small distance (50m). However, if the distance increases, there will be many difficulties. Moreover, based on the response time of each device, Ethernet layout seems to bring greater benefits
here we mainly discuss the long-term support of software configuration. It includes the following aspects:
· the ease of use of TCP / IP is based on the availability of skilled technicians and tools
· however, TCP / IP lacks high-level standards at present, which can not guarantee the automatic replacement supported by DeviceNet and ASI
· the complex options of TCP / IP will bring great trouble to inexperienced users
some systems such as DeviceNet and ASI are very suitable for application if the communication is within a region. However, when the data is to be transmitted in a wider range and special network technology is required in the application, the commercial TCP / IP network will be more attractive. Network assessment can be as simple as any computer's "trial run". Business technology focusing on simple judgment will eventually become very popular, and training TCP / IP maintenance personnel will become easier. Under this pressure, the device network will undoubtedly develop simpler, even browser based tools
in a well-designed network, the work of TCP / IP will be excellent, but the network must be carefully designed. The reliable working time of a single sub network with limited function or master / slave function is 2-5ms. However, when increasing routers or uncontrollable traffic (including web services), it may cause a delay of 500ms or longer. Therefore, the performance of Ethernet depends on the performance of user design
generally, well-designed Ethernet is comparable to or better than any ordinary control network even if its capability is not fully exhausted. However, poorly designed Ethernet may bring difficulties in operation
it is usually impractical for a web page to try to pass TCP / IP. Users often ignore the fact that the web page will force millions of data bytes through the network to control the traffic of 5-10000 bps. At the same time, the control data is constantly sent out to rece the control data traffic. Here, users and operators still need to learn to weigh and compromise. It's good to enter some web pages, but it needs to share and supplement the web resources stored outside the control network
the support for Ethernet TCP / IP system is very good, but the actual media (such as cable, connector and power supply) are not suitable for instrial applications. Many TCP / IP experts have information technology brains, but they lack consideration of instrial buildings. They do not understand why users need or improve the existing system, but improve the system according to other standards, which makes instrial users suffer losses. For users, they also need to understand the technology, and they should always pay attention to the trend of experts. Ask questions and let the experts know what you think about dealing with them. Ethernet TCP / IP system provides an open network platform, but the high-level application standard has not yet been determined. Because the high layer is dedicated, TCP / IP is often regarded as not a complete open standard. Some new versions of Modbus / TCP, DeviceNet, fieldbus and PROFIBUS provide help in this aspect. Different protocols can communicate through some interfaces, but there are still a large number of application standards that cannot interoperate
many of these networks also contain other protocols, but their interoperability does not extend to the physical layer and transport layer. This prevents communication between the buses. It seems that there is still a lot of work to be done in this area
even if the global TCP / IP system can be competent for the above work, whether its performance is reliable or not depends on the technical level of the executor. At the same time, more instrialized and optimized sensor bus is needed
with the increase of data demand, it will be more common to use mixed and single Ethernet. High level sensor with serial port has been connected with Ethernet. Protocols are transparently transmitted and sent to hosts at the highest level of TCP / IP. Sometimes hosts do not realize that they are running on LAN.

3. This is very simple

just open the network map

turn on voice navigation

there will be voice broadcast on it

you can't go the wrong way anywhere

it doesn't matter where you think.

4. Tuyili is a trading platform for virtual currency appreciation Currency, which is a kind of counterfeit currency. There is not much innovation, but a large number of it. The appreciation currency has published soft articles on many websites, which means that the appreciation currency is very fast, and then there are all kinds of advantages, creating an illusion for players. This kind of virtual currency only rises but does not fall. The future payment scene of appreciation currency is very broad, but in fact it is not. This kind of counterfeit currency was born in April 2015. At this stage, crypto digital currency has entered a long-term downturn. The platform may be created by the creation team of the appreciation Currency, which belongs to the self built platform, and the risk of making money and running away is great
if payment is said, it is even more ridiculous. At present, the performance of the hottest bitcoin in the field of payment is still disappointing. Not to mention other counterfeit currencies, there is basically no payment, which is pure speculation.