Now the popular technology is javaee's integration framework struts2+hibernate+spring.
There are also some official e-gallbladder B.
In short, javaee has a wide range of technical aspects. I think as long as you are an elite on one hand, you are a hero.
Question 2: What do you mean by the transformation of key technological achievements? Apply technology to production and transform theoretical knowledge into productive forces, commodities and so on.
Question 3: What are the key technologies of big data? Big data technology is a technology to quickly obtain valuable information from all kinds of data. A large number of new technologies have emerged in the field of big data, which has become a powerful weapon for the collection, storage, processing and presentation of big data.
Bigdata-job summarizes the key technologies of big data processing, including: big data collection, big data preprocessing, big data storage and management, big data analysis and mining, big data presentation and application (big data retrieval, big data visualization, big data application, big data security, etc.). ).
Question 4: What key technologies of 5G have China mastered? First, multiple access. Multiple access technology refers to the technology to solve the problem that multiple users communicate with the base station at the same time and how to share resources. In the battle for 5G standard, multiple access is a key point. The popular view now is NOMA, but some scholars hold different views.
The second is coding. Coding consists of long codes and short codes. LDPC year, driven by China manufacturer (Huawei), Polar introduced Turbo2.0 promoted by Europe and eMBB field promoted by the United States.
Competition between scene length code and short code scheme. American enterprises seized the encoded channels of long code and short code of eMBB scene (used to enhance the ability of resisting all kinds of interference when data is transmitted in the channel), and China enterprises obtained the eMBB field.
Control channel of scene short code (mainly used to transmit instructions to operate lower-level network devices). Although in the game of eMBB scene coding technology, Polar promoted by China is not as good as LDPC promoted by the United States, but the phase
It is still much better for Turbo2.0, and there is no gain.
Finally, multi-antenna technology. Multi-antenna is a technology to increase capacity, and now the industry is more optimistic about MIMO technology. Large-scale MIMO technology can not only reduce emissions without increasing spectrum resources.
Power, reduce intra-cell and inter-cell interference, and realize spectrum efficiency and power efficiency of 4G.
On this basis, it will be upgraded by another order of magnitude. In addition, RF modem technology and soft frequency reuse technology are also expected to become the key technologies of 5G communication, especially the heavyweight patent of soft frequency reuse is in Huawei's hands.
Overall, China has made important breakthroughs in many key technologies of 5G, and some technologies have entered the stage of testing and verification. Recently, Pilot V 1, the first prototype of Spreadtrum using FPGA, has completed the docking experiment with Huawei. The bandwidth of the second prototype is planned to increase to 100M, and it will be connected with the system manufacturer in the second half of 20 17.
Question 5: What are the main technical indicators of a computer? 1) operation speed. Operation speed is an important index to measure the performance of a computer. 2) word length. Generally speaking, the capacity of the memory is in the unit of binary number (3) processed by the computer at the same time. Memory, also known as main memory, is the memory that CPU can directly access, and the capacity of memory reflects the computer's ability to store information in real time. (4) Capacity of external memory. External storage capacity usually refers to hard disk capacity (including internal hard disk and mobile hard disk). The larger the capacity of the external memory, the more information can be stored. (5) The configuration and expansion ability of external devices mainly refers to the possibility, flexibility and adaptability of connecting computer systems with various external devices. Software is an indispensable part of the computer system, and whether its configuration is complete or not is directly related to the performance and efficiency of the computer.
Question 6: What do technical performance indicators mean? Refers to the technical performance indicators of this product, such as the main frequency of cpu and the front-end bus, rather than how many nanometers the process is when producing cpu.
Question 7: What are the main technical indicators in the paper?
Question 8: What are the key technologies of energy substitution technology innovation? The following points are energy saving.
1. Power saving 2. Low carbon cooking. Save water. Energy-saving use of household appliances. Recycling 6. Energy-saving fitness 7. Save energy for heating and cooling. Economy car. Bring your own shopping bag or reuse plastic bags 10. Use less disposable products 1 1. Use computers and printers reasonably.
Vigorously develop the tertiary industry, focusing on specialized division of labor and improving social efficiency, and actively develop productive industries; Focus on meeting people's needs and facilitating people's lives and promoting the development of life; Vigorously develop high-tech industries, adhere to the road of new industrialization, promote the upgrading of traditional industries, and increase the proportion of high-tech industries in industry. According to the concept of circular economy, accelerate the ecological transformation of the park, promote the construction of eco-agricultural park, build an inter-industry ecological chain, and promote the recycling of waste between industries. It is necessary to promote cleaner production in enterprises, reduce the generation of waste from the source, realize the transformation from terminal treatment to pollution prevention in the whole production process, promote the reduction and resource utilization of energy consumption, industrial solid waste and packaging waste in enterprises, control and reduce pollutant emissions, and improve resource utilization efficiency. Organize and cultivate scientific and technological innovative enterprises to improve the regional independent innovation ability.
Force. Strengthen cooperation with scientific research institutions, build a technology research and development service platform, and focus on building technical standard demonstration enterprises. Focusing on the efficient recycling of resources, we will actively carry out research on key technologies such as substitution technology, reduction technology, reuse technology, resource utilization technology and systematization technology, and break through the technical bottleneck that restricts the development of circular economy. Establish working institutions for developing circular economy and building a conservation-oriented society, and study and formulate various policies and measures for developing circular economy and building a conservation-oriented society. It is necessary to set up special funds for developing circular economy and building a conservation-oriented society, focusing on supporting circular economy development projects, energy-saving and consumption-reducing activities and subsidies for technological innovation in emission reduction. It is necessary to incorporate the gross domestic product of 10,000 yuan, chemical oxygen demand and total sulfur dioxide emissions into the annual plan for national economic and social development; It is necessary to establish and improve the energy conservation and environmental protection guarantee mechanism, and incorporate consumption reduction and emission reduction indicators into the target responsibility and cadre assessment system.
Question 9: What technologies does the network technology include? The key technologies of network include network nodes, broadband network system, resource management and task scheduling tools, and visualization tools of application layer. Network nodes are providers of network computing resources, including high-end servers, cluster systems, MPP system large storage devices, databases and so on. Broadband network system is a necessary means to provide high-performance communication in network computing environment. Resource management and task scheduling tools are used to solve key problems such as resource description, organization and management. The task scheduling tool dynamically schedules tasks in the system according to the current system load, thus improving the operating efficiency of the system. Network computing is mainly scientific computing, often accompanied by massive data. If the calculation results are converted into intuitive graphic information, it can help researchers get rid of the difficulty of understanding the data. This requires the development of visual tools that can be transmitted and read in network computing, and provides a friendly user interface.
baike.baidu/view/25363