computer operating system
1. What is a computer system
计算机系统包括操作系统（处理管理与配置内存、决定系统资源供需的优先次序、控制输入设备与输出设备、操作网络与管理文件系统等基本事务。也提供一个让用户与系统交互的操作界面。）、存储系统（指计算机中由存放程序和数据的各种存储设备、控制部件及管理信息调度硬件和软件所组成的系统。）、分布式系统（是建立在网络之上的软件系统，具有高度的内聚性和透明性。）、并行系统（是指同时执行多个任务或多条指令或同时对多个数据项进行处理的系统。）等的建造，以及其评估，调试等相关问题的研究。
Second, the factors considered in the design of computer systems
To successfully design a computer system, consider its function , performance , cost , usability , programmability and complexity .
3. How to meet the requirements of researching computer systems
1. Be able to comprehensively use various mathematical tools (Bloomfilter, homomorphic encryption, erasure code).
2. Perception of new general technical requirements, insights into the essential reasons behind technical problems and coding skills are the main tools.
3. There must be a certain algorithm basis.
4. How to learn the construction of system software
1. To understand the basic principles of computer systems, learn computer introduction and computer system design well.
2. To learn to build operating systems and distributed system modules, you need to learn operating system engineering (requires to implement a small operating system, must have startup, memory management, user environment, preemptive multitasking, file system, network driver) and distributed systems (requires to implement MapReduce system, distributed, fault-tolerant kv storage system, etc.).
3. Read more excellent open source codes, learn ideas and methods built by others, and try to open source some codes.
4. Participate in system competitions to enrich your experience.
Timing Dynamics
1. What is time series data
Refers to time series data, that is, columns of data recorded in chronological order at the same time.
2. What is the use of time series data
1. Able to perform online analysis and calculation.
2. Intelligent decision-making can be realized.
3. The value of the obtained data is high.
3. Key technology of real-time data
1. Key technologies for real-time computing of time-series big data:
1. Incremental calculation for statistical indicators of complex time series data ()
2. Dynamic time window for time series data processing (the time window must have the ability to scroll and slide drift, support long-term dynamic precision control, and support real-time Ad-Hoc query based on elastic time window)
3. Timing event sequence recognition()
4. Intelligent decision-making engine (supports millisecond-level decision-making, with non-linear expansion capability of decision-making logic)
2. Key technologies for real-time calculation of time-series dynamic graphs:
1. Real-time incremental calculation of time-series graphs (statistical characteristics of time-series aggregation, association, graph structure)
2. Real-time dynamic backtracking of timing diagrams (supporting long-period, different granularity time slicing capabilities)
3. Distributed memory storage engine for timing diagrams (extremely high performance, higher storage efficiency, linear expansion capability)
4. Real-time decision-making for timing diagrams (realized by machine learning)
4. Real-time data application scenarios
1. For the identification of scalper robots, it is judged whether it is a robot or a human by obtaining real-time request volume.
2. Network security attack and defense, by comparing its previous browsing records with the current browsing records to prevent
digital creative technology
1. Digital creative industries
Movies, games, animation, architecture, toys, architecture, smart wear and smart home.
2. Research direction of digital creative technology
1. Digital object generation system (AI-based digital content intelligent generation technology, cloud computing-based audio production technology, computer visual effect engine and application technology (to achieve high rendering), composite universe (using digital twins and other technologies to combine the real world with the virtual world) and digital twin technology (using digital twins to simulate people and objects))
2. Digital world construction system (video decoding technology, real-time streaming distribution technology, digital infrastructure supporting the composite universe)
3. Digital service integration system (video and audio ingest technology for next-generation fusion information and next-generation video and audio display technology (displayed by AR), rule engine of the multiverse)
3. Digital creative technology involves the integration of multiple disciplines
