Topic: Mathematical knowledge in the 24 solar terms.
I. Definition of solar terms
Twenty-four solar terms refer to 24 specific solar terms in the China lunar calendar, including the vernal equinox, summer solstice, autumn equinox and winter solstice. These solar terms are determined according to the position of the sun on the ecliptic, reflecting the periodic and seasonal changes of the earth's revolution around the sun.
Second, mathematics knowledge points
1. Calculation of solar ecliptic
The ecliptic of the sun refers to the longitude of the sun on the ecliptic, which is the theoretical basis of the 24 solar terms. In ancient China, the position of the sun on the ecliptic was determined by observing the position of the sun, and the specific date of each solar term was determined by mathematical calculation.
2. Angle and time conversion
In the twenty-four solar terms, the longitude angle of the sun has a certain relationship with the specific date. Through mathematical calculation and transformation, the specific date and time of each solar term can be determined.
3. Geometry and astronomy
Geometry and astronomy also played an important role in the formation of the 24 solar terms. By observing and measuring the position and motion law of the sun, people can calculate the specific date and time of each solar term.
Third, the case analysis
Take the vernal equinox as an example. The vernal equinox refers to the 360-degree solar term, which is also the midpoint of spring. Through mathematical calculation, it can be determined that the vernal equinox is on March 20th or March 2nd1day every year. On this day, people on the earth feel the changes of rising temperature, longer days and shorter nights.
Four. conclusion
Twenty-four solar terms are one of the scientific and cultural heritages in ancient China, which contains rich mathematical knowledge. By understanding and exploring these mathematical knowledge, we can better understand and apply these solar terms, which is of great help to our lives.
These are simple tabloid samples. By introducing the mathematical knowledge points and application examples in the 24 solar terms, readers can better understand and apply these knowledge points. If you want to make a tabloid, you can follow the following steps:
1. Determine the theme and title: Before making a tabloid, you need to determine the theme and title of the tabloid. For example, you can take "mathematical knowledge in the twenty-four solar terms" as the theme and take it as the title.
2. Collecting data: collecting data of mathematical knowledge points and application examples in the 24 solar terms. You can collect information by reading related books, searching the Internet or interviewing experts.
3. Organize the content: Organize the tabloid content according to the collected information. According to the structure of theme and title, the content can be organized into several sections, and attention should be paid to the logic and coherence of the content.
4. Layout design: According to the contents of tabloids, design a beautiful, concise and clear layout. You can use fonts, colors, pictures and other elements to design the layout to make it more attractive.
5. Write content: Write tabloid content according to the designed layout. We should not only pay attention to the conciseness and accuracy of the language, but also pay attention to the aesthetic norms of typesetting.
6. Check and proofread: After the tabloid is written, check and proofread it. Check whether the content is accurate, whether there are typos or other errors, and ensure the quality and accuracy of tabloids.
7. Finish the tabloid: Finally finish the production of the tabloid, which can be printed or handwritten. At the same time, you can also share it with others or participate in some competitions or activities.