MindMap Gallery Data and its characteristics
This is a mind map about data and its characteristics. Data is a symbolic record of objective things in the real world, a carrier of information, and an object of computer processing.
Edited at 2024-03-02 21:18:26This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about the reproductive development of animals, and its main contents include: insects, frogs, birds, sexual reproduction, and asexual reproduction. The summary is comprehensive and meticulous, suitable as review materials.
Data and its characteristics
Data and its characteristics
data
The concept of data: Data is a symbolic record of objective things in the real world, a carrier of information, and an object of computer processing
The data includes numerical and non-numeric symbols
Basic characteristics of data
Basic feature 1: binary system
Basic feature 2: semantics
Basic feature 3: Dispersion
Basic Feature 4: Diversity and Perception
Data encoding
Symbolizing the phenomena of the real world into data requires a process of understanding abstract reasoning, which is completed by computers.
Analog signals and digital signals
Analog signal: Analog signal refers to information expressed by continuously changing physical quantities.
Digital signal: A digital signal is a digital representation of a discrete-time signal
Basic way of coding
text encoding
Single byte code and double byte code
ASCll code and Morse code are single-byte codes
ASCll code Chinese meaning American Standard Code for Information Interchange
National standard code, Unicode is a double-byte code
National standard code
GB2312 contains a total of 7445 characters, 6763 Chinese characters, and 682 other symbols.
There are 3755 commonly used characters in the first level and 3008 in the second level.
The symbols before number 127 have the same meaning as the ASCll code and belong to single-word decoding.
GBK1.0 contains 21886 symbols
Divided into Chinese character area and graphic symbol area
sound coding
sample quantization coding
For audio signals, there are three commonly used sampling frequencies: 1: 44.1kHZ 2: 22.05kHZ 3: 11.025kHZ
Sound storage space = sampling frequency x quantization bits x number of channels x time ÷ 8
image encoding
Bitmap image encoding
The smallest unit of a bitmap is a raster point or pixel. Therefore, it is also called bitmap or pixel image.
Bitmap uses bitmap storage format
Bitmap file size
File size = file header, information header, color representation, image resolution × number of image quantization bits ÷ 8
Information and its characteristics
Shannon is known as the father of information theory
information
Information is meaningful data that has been processed
basic characteristics of information
universality
Transitivity
Sharability
Dependability and tractability
Timeliness
authenticity
value relativity
Knowledge and digital learning
knowledge and wisdom
Doing experiments → Obtaining observation data → Analyzing and processing data → Reasoning, establishing mathematical models → Experimental verification of models → Forming knowledge → Applying knowledge to solve problems is a very effective knowledge development path
Knowledge
Knowledge is the result of people using their brains to systematically refine, research and analyze the information they obtain or accumulate. It can accurately reflect the essence of things. It comes from practice, is processed and refined, and is higher than practice.
Data information knowledge and wisdom are progressive concepts. The former is the foundation and premise of the latter, and the latter is the abstraction and sublimation of the former.
wisdom
Wisdom is the innovative thinking ability to use knowledge to solve problems in order to achieve predetermined goals.
Digital learning and innovation
Digital tools and resources and their benefits
Digital tools and resources
Digital tools refer to equipment and devices capable of collecting, retrieving, expressing, transmitting and processing multimedia digital resources.
Data collection tools: sound card, video card, digital camera, scanner, etc.
Information acquisition tools: desktop computers, laptops, tablets and mobile phones, etc.
Digital visual expression tools: mind maps, presentations, etc.
Information communication exchange and transmission tools: email, blogs, social software, information conference systems, etc.
Information communication exchange and transmission tools: email, blogs, social software, video conferencing systems, etc.
Information storage tools: CD, USB disk, hard disk, server, etc.
Information processing tools: programming software, multimedia production software, website production tools, information system manufacturing tools
3D design tools: 3D production software, 3D printer, virtual reality, augmented reality production system, etc.
Advantages of digital tools and resources
Ease of acquisition
variety of forms
Sharing of resources
Platform interactivity
Extensibility of content
Characteristics of digital learning
problematize
Cooperation
personalise
creativity and regeneration
openness
Experience the digital innovation learning process
needle experiment
The Monte Carlo method is the basis of computer simulation and originated from the head-pin experiment of the 18th-century mathematician Buffon.