Mutongde photography hall

Greenwich mean time: the average solar time calculated from midnight of the prime meridian. Also known as Greenwich Mean Time or Greenwich Mean Time. The difference between the local average time and universal time is equal to the geographical longitude of the place. Before 1960, it was widely used as a basic time measurement system. Because of the change of the earth's rotation speed, it is not a unified time system. Later, universal time was replaced by calendar time and atomic time, but it is still necessary in daily life, astronomical navigation, geodesy and space flight. At the same time, universal time reflects the change of the earth's rotation rate, is one of the earth's rotation parameters, and is still the basic data of astronomy and geophysics.

Universal time is a time measurement system based on the earth's rotation. The angle of the earth's rotation can be measured by the movement of the local meridian relative to the basic reference point on the celestial sphere. In order to measure the earth's rotation, people choose two basic reference points on the celestial sphere: the vernal equinox and weekdays.

Taking spring as the basic reference point, the time determined by the apparent motion of the vernal equinox on Sunday is called sidereal time (ST). The number of local stars in a certain place is equal to the time angle of the local vernal equinox relative to meridian circle.

With the average sun as the basic reference point, the time determined by the average sun's apparent motion on Sunday is called the average solar time (MT). Flat Sun is an imaginary reference point proposed by American astronomer S Newcomb (1835–1909) at the end of19th century. It moves at a uniform speed on the celestial equator, and its speed is consistent with the average speed of the apparent motion of the true sun. Its right ascension is:

a⊙= 18 h38 m45s . 836+8640 184s . 542t+0s . 0929 T2

Where t is the number of julian calendar centuries starting from 09001October 0, 65438+ 12.

Greenwich mean solar time starts at midnight and is called Universal Time (UT).

Universal time is derived from sidereal time, and its conversion formula is:

UT0=ST-a⊙-λ+ 12h

λ is the adopted value of the longitude (east longitude) of the observation point.

When observing the world obtained by stars at various observatories, the initial value is recorded as UT0. Observers in different places get different UT0 at the same time. UT 1 is obtained by correcting the longitude variation caused by the pole shift in UT0. that is

ut 1 = UT0+δλ

δλ=(xsinλ-ycosλ)TGφ

X and y are instantaneous polar coordinates. Like λ, it is based on CIO. φ is the geographical latitude of the observation site. UT 1 is the basis of civil time all over the world; At the same time, it also represents the rotation angle of the earth's instantaneous rotation axis, so it is the basic parameter to study the earth's rotation movement. Adding Δ TS to UT 1 and correcting the seasonal variation of the earth's rotation speed can get a smooth universal time UT2 in one year. that is

UT2 = ut 1+δTS = UT0+δλ+δTS

Starting from 1962, the expression of δTS adopted internationally is:

δTS = 0s . 022 sin 2πt-0s . 0 12 cos 2πt-0s . 006 sin 4πt+0s . 007 cos 4πt

T is in years, counting from the beginning of Bessel.

The values of δ λ and δ Ts are calculated by the International Time Bureau (BIH) and notified to all countries.

Prescribed reason

If you travel around the world from west to east, every time you cross a time zone, you will put your watch forward for one hour, so when you cross 24 time zones and return to the original place, your watch will just put it forward for 24 hours, that is, the same hour the next day; On the contrary, when you travel around the world from east to west, your watch indicates the same time the day before. In order to avoid this "date confusion" phenomenon, 180 meridian is defined as "international international date line" internationally. When you cross the international international date line from west to east, you must subtract one day from your timing system; On the other hand, crossing the international international date line from east to west requires an extra day.

Formation of Waterfalls: Waterfalls are called falling water in geology, that is, rivers fall vertically when they flow through faults, depressions and other areas. During the river period, waterfalls are a temporary feature and will eventually disappear. The rate of erosion depends on the height and discharge of a particular waterfall, the type and structure of related rocks and other factors. In some cases, the location of waterfalls recedes upstream because cliffs or scarps are washed away by water; In other cases, this erosion tends to go deep and obliquely cut the whole river section including waterfalls. With the passage of time, either or both of these factors are at work, and the inevitable trend of rivers is to eliminate any possible waterfalls.

The energy of the river will eventually form a relatively smooth and upward concave longitudinal section. Even when gravel does not exist as a tool for river erosion, the energy available for waterfall base erosion is very large. One of the characteristics associated with waterfalls of any size, discharge and height is the existence of sinkholes, which are basins excavated and eroded in rivers under water. In some cases, the depth of the plunge pool may be similar to the height of the steep cliff that caused the waterfall. The plunge pool eventually caused the collapse of steep slopes and the retreat of waterfalls.

The cliff that caused the falling water will continue to collapse under the strong impact of the current, which will make the waterfall retreat upstream, reduce its height and eventually lead to the disappearance of the waterfall.

Famous Waterfalls: Waterfalls are magnificent natural landscapes on the earth. The three most famous waterfalls in the world are Niagara Falls, Victoria Falls and Iguazu Falls.

1) Angel Waterfall: Located in Venezuela, it is the largest waterfall (979 meters) in the world.

2) Tugra Falls in South Africa

3) Kalambo Falls between Tanzania and Zambia

4) yosemite falls, California, USA.

5) Lacouk South Falls in Guyana and Venezuela

6) Thornland Falls in New Zealand

7) Wolomonby Falls in New South Wales, Australia

8) Simadora Falls in Norway

9) East Notre Dame Falls in Norway

10) Gavalin Falls, France

1 1) Galsopa Falls: Located on the Salava River in the west of Karnapek, India, with a height difference of 289)09 meters. The largest waterfall in India.

12) Iguazu Waterfall: Located 23km upstream of the intersection of Iguazu River and parana river on the Argentine-Brazilian border, it is the largest waterfall in South America.

13) Konggen Waterfall: Located on the Mekong River in Chambazhai Province, Laos, it is 9)7 kilometers wide and is one of the largest waterfalls in the world.

Sanming Scenic Area: Yuhua Cave in Jiangle

Sanming has beautiful mountains and rivers, and the unique karst landforms form the wonders of Fujian karst caves. For example, Danxia landforms such as Jiangle Yuhua Cave, Ninghua Swan Cave Group, Shaxian Qixian Cave and Mingxi Yuxu Cave form the wonders of Taining Jinhu and Yong 'an Taoyuan Cave, and igneous landforms form the wonders of Ruiyun Mountain Scenic Area.

Sanming is known as the "green treasure house". There is the highest yield per unit area in the world, "Ninghua Gushan Wangqun"; There are the world's largest Castanopsis kawakamii natural forest area-Sanyuan Shenkou Castanopsis kawakamii nature reserve and four nature reserves, such as Jiangle Qilongshan, Shaxian Radish Rock Nanmu Forest and Yongan Tianbaoyan, which are famous for their many rare animals and plants.

Main attractions: Taining Ancient City, Ganluyan Temple, Comrade Mao Zedong's Former Residence, Shuiqianyan Village, Taining Shangshudi Building Complex, Mao Zedong's Former Residence, Huiqing Bridge, Chenghuang Temple, Beishan Revolutionary Memorial Park, Luoguping Jianning County Revolutionary Memorial Hall, Qingyun Pavilion, Han Yun Temple, Mingtai Temple Jinhu, Fujian Taoyuan Cave and Sanming Brother Ruiyun Mountain. Shaxi River Champion Cave Taining Emei Mountain Jinchang Mountain Beidou Mountain Cold Spring Gale Mountain Longquan Mountain Scenic Area Baohua Cave Datian Daxianfeng Junfengshan Jinchang Shanzhai Xia Grand Canyon Shangqing Stream

Ruiyun Cave: Located in Chen Da Town, northwest of Sanming City, 4 kilometers away from the city center/kloc-0, it is named after the dense clouds on the mountain. The scenic area is 10 square kilometer, and the highest elevation is 1249.8 meters. It is a combination of unique volcanic landform and rich evergreen broad-leaved forest landscape. The main attractions are Ruiyun Cave, Bat Cave, Golden Cave, Changshou Spring, Ren Xian Pool, Sandie Rock and Matou Peak. The third batch of provincial scenic spots.

Ruiyun Cave, 30 meters deep, 6 1 m wide and more than 4 meters high, looks like a lion's mouth. The roof of the cave is loose as a cover, and the flowing water is gurgling, such as beads and curtains, hanging in the hole all the year round. The stone wall at the entrance of the cave is as thin as a razor, and there are several stone carvings on the cliff since the Song Dynasty, including the inscription "Rong Rong" when Han Zhi, the supervisor of the Imperial History Officer, gave a lecture during the Qianlong period of Qing Dynasty (1736 ~ 1795), and the couplets such as "People hide jade in the stone, and visitors come to the cave to be separated by a bead curtain". Yiyan has a five-wood temple, which was built in the Song Dynasty. It is a place where Buddhism, Taoism and local ancestors gather together, and the incense is flourishing. There have been many repairs since the Ming Dynasty. The stone gate in front of the cave was built in the Kangxi period of Qing Dynasty (1662 ~ 1722), and the word "Ruiyun Cave" was engraved on it. The single arch stone bridge in front of the mountain gate was built in the Ming Dynasty, with simple style.

Northeast of the cave, out of the mountain gate, there is an old tree, vigorous and tall, hovering in the shade, called Changshou Spring. By the spring, tourists wrote "Yuquan Waterfall" during the Hongwu period of Ming Dynasty (1368 ~ 1398). Southwest of the cave is a cave to ward off evil spirits, a small sky, fish ponds and other landscapes

There are lush trees in the scenic area, and there are 3 1 family and 192 species of plants. Gu Teng, which is full of mountains, is flexible and vigorous, dancing and winding like a dragon and snake, which is a major feature of the scenic spot.

Dayoushan Eco-tourism Zone: It is located in the northwest of Sanming City 15km, with an area of 12km and the elevation of the main peak of Dayoushan1276.3 m. The scenic spot is a typical volcanic landform, belonging to the continental pyroclastic deposit-volcanic eruption structure, which is characterized by the landform of solitary peaks entering the clouds and overlooking the peaks, and the tourist images such as waterfalls, flowing springs, cliffs of secluded Gorges and pictographic lingshi are carved. The climate in the area is pleasant, with obvious vertical differentiation, hot in summer and cold in winter, warm in spring and cool in autumn, and beautiful scenery in four seasons. Shengshan blessed land has a long history, pleasant scenery and touching legends. The annals of Bamin in the Ming Dynasty, Shaxian in the Qing Dynasty and Fujian in the Republic of China all have considerable space to describe the scenic spots in Judah, and there are records of sitting on the peak banquet, gathering stars, forgetting worries, reducing demons, Tianwei stone, hidden cloud cave and returning cloud cave. People in this city have always regarded Judah as an auspicious holy land. There is a Zhao Pu Temple on the hill, with a strong incense. Since the Song Dynasty, scholars and poets have come to Judas Mountain to recite poems, and Song Jinshi and Luo Qi, Minister of the Ministry of War, have praised them. Seeing the sun and the moon at the top of the mountain on the fifteenth and fifteenth day of the lunar calendar is a symbol of Sanming, a strange astronomical phenomenon of "the sun and the moon shine together".

Shaxi Riverside Tourist Area: Shaxi Riverside Tourist Area is an emerald corridor that displays Sanming's urban scenery, from Chengguan Bridge in Sanyuan District to Banzhu Hydropower Station. There are 3 large cruise ships, motorboats 18, 55 pedal boats, 9 small sampans and 2 special docks. Visitors can take a boat trip to "Sanming in the upper reaches of the water" and "leisure tour at night", appreciate the mountain style of "mountains like jade hairpin, water like green ribbon, and city like a city that never sleeps" and experience the comfort of "traveling in the picture world where green mountains and clear waters and Sanming enjoy the beauty of day and night".

Jinsiwan Provincial Forest Park: Located in Chen Da Forest Farm, with an area of 15 1.7 km2. The natural forests in the park are stacked on top of each other, and waterfalls fly down. Tourists are impressed by all kinds of exotic animals, flowers and plants in the park. The whole park presents an original ecological landscape everywhere. For tourists, it is really interesting to take a relaxing trip after work, experience the fragrance of melons and fruits, surf and explore, and enjoy the charming scenery that makes people feel relaxed and happy.

Jinsiwan Provincial Forest Park consists of five areas: rare bird breeding area, bamboo viewing area, orchard sightseeing area, leisure resort area and Ruiyun drifting area. Visitors can hunt, fish, barbecue, play with monkeys, taste melons and fruits, and have a rest and vacation in Lvbo Tea House and Caidie Mountain Villa. You can personally experience the graceful Jade Girl Waterfall, the steep and spectacular cliff stone carvings and the warm and romantic forest bathing place.

Hutou Mountain: The word "tiger" in Hutou Mountain was originally the "axe" of an axe, so it was named after the shape of Hutou Mountain was like a tilted axe. Because the axe mountain range is endless, just like a gorgeous tiger, it has always been called the "tiger" among tigers and has been used and circulated. The peak altitude is1102m, which is the highest peak in the urban area. "Hufeng Dusk Cloud" is one of the eight scenic spots in the urban area.

Hutou Mountain is rich in vegetation, including coniferous forest, juniper, sapium sebiferum, Schima superba, flower palm, sightseeing wood, Phoebe bournei and more than 200 kinds of trees. The mountains are high and dense, and there are many natural birds and animals. There used to be South China tigers, rabbits, bamboo chickens and so on, all of which were natural. When the afterglow of morning light or sunset reddens the valley, birds such as tits, cuckoos, turtledoves and partridges often sing together and play a touching mountain symphony in harmony with the slow mountain wind and flowing water.

The ancients said: "The bone of the mountain is in the stone, the interest of the mountain is in the water, the state of the mountain is in the tree, and the spirit of the mountain is steep, beautiful and high." Compared with Hutou Mountain, there are not only strange peaks and rocks, steep cliffs and deep valleys, waterfalls and flowing springs, but also ancient temples such as Yunfeng Temple and Tiantan Temple in the worse heaven. Natural scenery and religious culture complement each other.

Qilinshan park

Qilinshan Park: Qilinshan Park is located in the east of Sanming City, and was built in 1980 and 10. Qilin Mountain, formerly known as Niulongshan, is 262 meters above sea level. It was renamed because an ancient grave halfway up the mountain dug up the inscription that Confucius hit Kirin.

Covering an area of 40 hectares, the park has tourist attractions and facilities such as Qilin Pavilion, ropeway, Youlong Water Play, Garden in the Garden, Suzhou Pavilion, Qilin Academy, winding paths leading to a secluded place and so on. There are also Haoran Pavilion, Juyun Pavilion, Sanyuan Pavilion, Lotus Pavilion, Flying Stone Pavilion and Pavilion Gallery. Pavilions and pavilions are three points, six corners and four squares, and the heights are scattered. Qilin Pavilion was built at the highest point of the mountain, with a height of 24.5 meters and a width of 12 meters. It has an octagonal six-story reinforced concrete structure. When you climb the pavilion, you can see the panoramic view of the far and near scenery.

There is an artificial lake with an area of about 3 mu in the north of the mountain. There is a reflection crane pavilion in the east of the lake, and the lonely crane at the top of the pavilion is independent; There is Lin Ji Bridge by the lake, and Wuqu Bridge by the lake. There are electric dragon boats in the lake for tourists to enjoy around the lake.

There are restaurants, teahouses, photography departments and arts and crafts exhibition halls in the park.

The cableway leading to the top of the mountain is the earliest hanging chair cableway put into operation in China's tourist attractions. 1 completed in June, 983, with a length of 625.34m, a height difference of 92.75m, a speed of1m/s, a 4 1 hanging chair, which can seat 82 people. There is a highway around the mountain leading to the top of the mountain.

Cowboy Piccolo: China's Piano Works

That riddle should be flute.

It's been almost an hour since I checked so much information. Please give me some hard work.