Question 2: What are the advantages of news management system? What is its research significance? With the popularity of the Internet, more and more enterprises have established their own WWW websites. Through these websites, enterprises can display their products, release the latest trends, communicate with users, establish contacts with partners and conduct e-commerce. Among them, the news management system is an important part of the enterprise website, which plays a dual role. On the one hand, it can be used to dynamically release new products or new development projects, on the other hand, it can timely announce business performance, technology and R&D progress, specially recommended or preferential engineering projects, products and services to customers, thus attracting customers and expanding customer base.
Question 3: Definition of the research significance of cost management: Cost management refers to a series of scientific management behaviors such as cost accounting, cost analysis, cost decision-making and cost control in the process of enterprise production and operation. Cost management generally includes cost forecasting, cost decision-making, cost planning, cost accounting, cost control, cost analysis, cost assessment and other functions. Function: Cost management is an important part of enterprise management, which requires systematic, comprehensive, scientific and reasonable. It is of great significance to increase production and reduce expenditure, strengthen economic accounting, improve enterprise management and improve the overall management level of enterprises.
Question 4: How to write the meaning and requirements of graduation thesis? The global LTE is booming, with huge market opportunities and unlimited development potential. As of May 20 12, 64 LTE networks in 34 countries have been put into commercial use, including 6 TD-LTE networks. In China, six cities, including Shanghai, Nanjing, Hangzhou, Guangzhou, Shenzhen and Xiamen, have built experimental networks, and Hangzhou has achieved trial commercialization in May.
TD-LTE network optimization process TD-LTE network optimization includes optimization project start-up, single station verification, RF optimization, KPI optimization and network acceptance. Single station verification refers to ensuring the normal operation of each cell, including normal access and throughput within the normal range. Radio frequency optimization is used to ensure wireless signal coverage in the network and solve business problems caused by radio frequency. Radio frequency optimization is generally cluster optimization, mainly referring to drive test data. When optimizing radio frequency partition, the network edge between regions also needs attention and optimization. KPI optimization includes the analysis of drive test data and conversation data to make up for the wireless network problems that are not considered in RF optimization. Through KPI optimization, we can solve various business-related problems such as access failure, disconnection and handover failure in the network. Comparison between TD-LTE and 2G/3G network optimization: TD-LTE network optimization has the same idea as 2G/3G optimization, and also pays attention to network coverage, capacity and quality. Through coverage adjustment, interference adjustment, parameter adjustment, fault handling and other network optimization means, the network is dynamically balanced, the network quality is improved, and the user perception is guaranteed. TD-LTE is different from 2G/3G system, which leads to different parameters involved in various processes such as reselection, access and handover in system optimization. The interference source of TD-LTE system is also very different from that of 2G/3G system, which needs to be avoided by different means. The cell capacity of TD-LTE will gradually decrease with the increase of cell coverage, and the balance between coverage and capacity should be paid attention to in optimization. The performance of LTE depends heavily on SINR, and the throughput will decrease rapidly with the deterioration of SINR. Because of the same frequency networking, in order to improve the performance of LTE, the scope of the main service area is stricter than that of 2G/3G. TD-LTE network optimization content TD-LTE optimization content mainly includes PCI optimization, interference investigation, coverage optimization, neighbor optimization and system parameter optimization.
PCI optimization PCI interference is prone to problems such as dropped calls and slow download speed. PCI optimization needs to follow the following three principles: PCI multiplexing should be separated by at least 4 cells, and the cell radius should be more than 5 times; All neighbor lists in the same cell cannot have the same PCI, and the pilot positions in adjacent cells are staggered as much as possible, that is, the remainders after modulo 3 in adjacent cells are different. Interference troubleshooting According to different interference sources, interference can be divided into two categories. One is internal interference, including GPS deviation, equipment hidden failure, antenna feed system failure and so on. The other is external interference, including stray interference, barrage jamming and intermodulation interference. Common network coverage problems in coverage optimization are all caused by over-coverage, under-coverage or unbalanced coverage, which leads to lower access success rate, higher drop rate, lower handover success rate and lower download rate. There are many reasons for the problem of wireless coverage, including the engineering quality problem of antenna feeder system, antenna selection, the rationality of coverage related parameters setting, equipment failure and other reasons. The coverage optimization measures include checking antenna installation, adjusting antenna direction angle and inclination angle, adjusting antenna sector beamforming coefficient, troubleshooting equipment, checking the relationship between adjacent cells and adjusting reference power. Neighbor optimization Neighbor optimization aims to improve coverage, reduce drop-off rate and improve handover success rate. There are two main problems in the process of neighbor cell configuration. The loss of adjacent cell configuration may directly lead to disconnection. Multi-neighbor cell configuration will not only occupy the number of neighbor cell configurations, but also affect the timeliness of measurement. It is very important to configure neighboring cells correctly and reasonably. In the optimization, it is necessary to check, adjust and optimize the neighboring cells according to the geographical location, wireless environment, KPI indicators and test conditions. System parameter optimization At present, TD-LTE mainly includes power parameters, PCI parameters, handover parameters, interference avoidance algorithm parameters and antenna technical parameters. The network optimization of TD-SCDMA lays the foundation of data optimization for the network optimization of TD-LTE, and many optimization ideas can be used for reference. & gt
Question 5: What is the function of management information system? Management information system is a science formed on the basis of management, system science, information science and computer science in order to meet the needs of modern management. It studies the whole process of information processing and decision-making in management system, and discusses the realization method of computer. It is a system composed of hardware and software such as people, computers and communication equipment, which can collect, process, store, transmit, maintain and use management information. Management information system can promote the development of enterprises in the direction of informatization, make enterprises in a virtuous circle of sensitive information, scientific management and accurate decision-making, and bring higher economic benefits to enterprises. Therefore, management information system is an important symbol of enterprise modernization and the only way for enterprise development.
Information system is widely used in the management of various affairs, which promotes the improvement of enterprise management level. Management information system serves management, and its development and establishment make enterprises get rid of backward management methods and realize effective ways of management modernization. Management information system makes management unified, standardized and modernized, greatly improves management efficiency and forms a unified and efficient modern management system. In the past, the traditional management mode was manual operation with people as the main body. Although managers have invested a lot of time and energy, their personal abilities are limited, so the management work is inevitably limited or subjective and one-sided. Management information system (MIS) is a man-machine system, which is established by using system ideas, takes computers as information processing means and modern communication equipment as basic transmission tools, and can provide information services for decision makers. This is undoubtedly an important measure to improve management quality by combining management with modernization and relying on science and technology. Management information system gives a lot of complicated information processing to computers, which makes people and computers give full play to their respective specialties and form a harmonious and effective system, bringing convenience to modern management.
In modern management, computer management information system has become an indispensable helper in enterprise management, and its wide application has become an important symbol of management modernization. In the modernization of enterprise management, the modernization of organization, method and control is inseparable from the modernization of management means. With the development of science and technology, especially information technology and communication technology, computers and networks are gradually applied to modern management. Faced with more and more information resources and more complex internal and external environment of enterprises, it is necessary for enterprises to establish an efficient and practical management information system to provide guarantee for enterprise management decision-making and control, which is an inevitable trend to realize management modernization.
Management information system plays an important role in management modernization. It is not only an effective way to realize management modernization, but also promotes the process of enterprise management modernization.
The role of information: to enhance the sustained and rapid development of the national economy and enhance the comprehensive strength of the country; It is conducive to meeting the challenges after China's entry into WTO and adapting to international competition. Informatization is the key factor to determine success or failure, and it is conducive to grasping the good development opportunities in the new century. We are in an era of rapid rise of knowledge economy and rapid development of global informatization. The collection, sharing, utilization and dissemination of information not only become the key factors to determine the competitiveness of enterprises, but also become the key factors to determine the level of national productivity and economic growth. Information is the basis of sustainable development and successful planning for decision makers, which can improve the accuracy and timeliness of management information and contribute to further scientific decision-making. It can make the business process and management process more reasonable, thus helping to enhance the rapid response ability. It can further promote the rational combination and utilization of resources, so that it can achieve the best utilization effect under the existing resources conditions, thus greatly improving the production and operation efficiency and management efficiency. Providing a powerful and fast information exchange platform will help us closely track some advanced experiences and achievements, thus contributing to the development of the organization.
Question 6: What are the concepts, main types and main features of system theory? 1. Concept: System theory is a knowledge to study the general model, structure and laws of a system. It studies the same characteristics of various systems, quantitatively describes their functions by mathematical methods, and seeks and establishes principles, principles and mathematical models applicable to all systems. It is a science with logical and mathematical attributes. 2. Types: System theories are diverse, which can be divided into system types according to different principles and situations, natural systems and artificial systems according to human intervention, and natural systems, social systems and thinking systems according to scientific fields. 3. Characteristics: System theory holds that integrity, relevance, hierarchical structure, dynamic balance and time sequence are the basic characteristics of all systems, which are not only the basic ideas and viewpoints of the system, but also the basic principles of the system method, indicating that system theory is not only a scientific theory reflecting objective laws, but also has the significance of scientific methods.
Question 7: The purpose and significance of simple wireless remote control system;
The development of wireless remote control technology is only a few decades, but with the rapid development of electronic technology and the continuous emergence of new large-scale remote control integrated circuits, wireless remote control technology is developing with each passing day. The design focuses on the wireless remote control system, which transmits wireless signals through the control switch and then receives signals through the wireless receiving module and its working principle.
The design is conducive to consolidating the professional knowledge learned, promoting the in-depth theoretical research, laying a foundation for further study, evaluating the academic situation and investigating the comprehensive ability during the school period, and also helping to cultivate and exercise the ability to analyze and solve practical problems and scientific research and innovation by using the basic knowledge, theories and skills learned, and cultivate a rigorous learning attitude. Through experiments, we can improve the understanding of single chip microcomputer, further understand and master the structure and working principle of single chip microcomputer, and improve the ability of software debugging.
And all kinds of problems encountered in the research process can promote business learning and improve academic performance. And establish a complete concept of communication system.
Question 8: What function can the "personalized recommendation system" of Ping++growth intelligence system achieve? The intelligent ordering system can get through the data of people, goods and markets, accurately predict the types and demands of goods in future stores, reduce the elimination rate of goods and improve the profit margin.
Question 9: What is the purpose and significance of studying enterprise accounts receivable management? This is the purpose: hope to adopt ~
1, through the systematic study of enterprise accounts receivable management, it can help enterprises to formulate reasonable
Credit policy, reduce the risk of enterprise credit sales, strengthen the dynamic monitoring of accounts receivable,
Avoid enterprises falling into financial crisis or even bankruptcy.
2, through systematic learning enterprise accounts receivable management, enterprises can use credit.
The income increased by sales means is greater than the cost of holding accounts receivable.
3. Through the systematic study of enterprise accounts receivable, the liquidity of accounts receivable can be improved.
Improve the financial indicators related to accounts receivable, so as to improve the financing ability of enterprises.
4. Through the systematic study of enterprise accounts receivable management, we can learn from foreign advanced management.
According to the experience, explore the management mode of accounts receivable suitable for China's national conditions.
Question 10: the purpose and significance of mine ventilation system design 10: Mine ventilation design is an important part of the whole mine design and an important link to ensure safety in production. Mine ventilation relies on ventilation power to continuously input a certain amount of fresh air into the underground along the established ventilation route to meet the needs of coal mining face, tunneling face, electromechanical chamber, powder magazine and other places where wind is used; At the same time, the used dirty air is constantly discharged from the ground.
The mine ventilation system should be determined by optimization or technical and economic comparison according to the mine gas emission, mine design production capacity, coal seam occurrence conditions, topsoil thickness, mine area, ground temperature, coal seam self-biting tendency and other conditions, on the premise of ensuring mine safety, taking into account the production needs in the middle and late stages.