The total organic carbon (TOC) content series from the lake sediment of Minqin Basin (100°57′–104°57′E, 37°48′–39°17′N) in northwestern China, which has a 10 000-year-long paleo-climatic prox...The total organic carbon (TOC) content series from the lake sediment of Minqin Basin (100°57′–104°57′E, 37°48′–39°17′N) in northwestern China, which has a 10 000-year-long paleo-climatic proxy record, was used to analyze the Holocene climate changes in the local region. The proxy record was established in the Sanjiaocheng (SJC), Triangle Town in Chinese, Section (103°20′25″E, 39°00′38″N), which is located at the northwestern boundary of the present Asian summer monsoon in China, and is sensitive to global environmental and climate changes. Applying singular spectrum analysis (SSA) to the TOC series, principal climatic oscillations and periodical changes were studied. The results reveal 3 major patterns of climate change regulated by reconstructed components (RCs). The first pattern is natural long-term trend of climatic change in the local area (Minqin Basin), indicating a relatively wetter stage in early Holocene (starting at 9.5 kaBP), and a relatively dryer stage with a strong lake desiccation and a declined vegetation cover in mid-Holocene (during 7–6 kaBP). From 4.0 kaBP to the present, there has been a gradually decreasing trend in the third reconstructed component (RC3) showing that the local climate changed again into a dryer stage. The second pattern shows millennial-centennial scale oscillations containing cycles of 1 600 and 800 years that have been present throughout almost the entire Holocene period of the last 10 000 years. The third pattern is a millennial-centennial scale variation with a relatively smaller amplitude and unclear cycles showing a nonlinear interaction within the earth’s climate systems.展开更多
Though the farmer is the group with the biggest population in China,they are a disadvantaged group.In the construction of new socialist countryside in China.there are also causes for the disadvantaged group status,whi...Though the farmer is the group with the biggest population in China,they are a disadvantaged group.In the construction of new socialist countryside in China.there are also causes for the disadvantaged group status,which are embodied in many aspects.The status is the important root of many problems of agriculture and countryside in China.Changing the farmers status of the disadvantaged group is the key to constructing the new socialist countryside,deepening the reform in the countryside and realizing the benign social and econontic development in the countryside in China.展开更多
Innovation is the source of modem enterprise profit, is also the fundamental driving force for enterprise development. With the rapid development of knowledge economy, the private economy is more and more important in...Innovation is the source of modem enterprise profit, is also the fundamental driving force for enterprise development. With the rapid development of knowledge economy, the private economy is more and more important in our national economy. Private enterprises become the main body of the market economy, at the same time, private enterprises in stabling economic growth, promoting international trade, promoting technological progress, reducing unemployment plays a positive role which cannot be substituted. However, private enterprises are existence problems such as lack of innovation resources, and inadequate innovation ability. Therefore, the private enterprise has important practical significance to studying the technological innovation project.展开更多
Preparation of tourism development planning should be based on economic and social development plan, and adapt to economic growth and the development of related industries. Tourism development planning should use land...Preparation of tourism development planning should be based on economic and social development plan, and adapt to economic growth and the development of related industries. Tourism development planning should use land planning, regional planning and territorial planning to be related to the overall urban planning coordination, it shall comply with the relevant provisions of the national infrastructure plan. Tourism development planning should be coordinated with scenic spots, nature reserves, cultural and religious sites, cultural relic＇ s protection units and other professional planning. National Tourism Bureau is responsible for organizing the preparation of the national tourism development plan, the development of regional tourism planning across provincial development planning and national priorities identified tourist routes, and tourist areas; local tourism bureau is responsible for organizing the preparation of the administrative region tourism development plan. According to the relevant provisions of the National Tourism Administration Tourism Planning and Design Qualification management, tourism development plan is announced for the preparation of qualification units. Tourism Development Plan prepares for the economic and social development which should be market prospects, resources, environmental factors to conduct a thorough investigation to obtain accurate basic data, it starts from the market demand attention ecological environment and cultural heritage protection and continuation of the positive use of advanced planning methods and techniques.展开更多
基金the National Natural Science Foundation of China (NSFC) (No. 40571169)the NSFC’s Innovation Team Project (No. 40421101), and the NSFC’s Key Program Project (No. 90502008)
文摘The total organic carbon (TOC) content series from the lake sediment of Minqin Basin (100°57′–104°57′E, 37°48′–39°17′N) in northwestern China, which has a 10 000-year-long paleo-climatic proxy record, was used to analyze the Holocene climate changes in the local region. The proxy record was established in the Sanjiaocheng (SJC), Triangle Town in Chinese, Section (103°20′25″E, 39°00′38″N), which is located at the northwestern boundary of the present Asian summer monsoon in China, and is sensitive to global environmental and climate changes. Applying singular spectrum analysis (SSA) to the TOC series, principal climatic oscillations and periodical changes were studied. The results reveal 3 major patterns of climate change regulated by reconstructed components (RCs). The first pattern is natural long-term trend of climatic change in the local area (Minqin Basin), indicating a relatively wetter stage in early Holocene (starting at 9.5 kaBP), and a relatively dryer stage with a strong lake desiccation and a declined vegetation cover in mid-Holocene (during 7–6 kaBP). From 4.0 kaBP to the present, there has been a gradually decreasing trend in the third reconstructed component (RC3) showing that the local climate changed again into a dryer stage. The second pattern shows millennial-centennial scale oscillations containing cycles of 1 600 and 800 years that have been present throughout almost the entire Holocene period of the last 10 000 years. The third pattern is a millennial-centennial scale variation with a relatively smaller amplitude and unclear cycles showing a nonlinear interaction within the earth’s climate systems.
文摘Though the farmer is the group with the biggest population in China,they are a disadvantaged group.In the construction of new socialist countryside in China.there are also causes for the disadvantaged group status,which are embodied in many aspects.The status is the important root of many problems of agriculture and countryside in China.Changing the farmers status of the disadvantaged group is the key to constructing the new socialist countryside,deepening the reform in the countryside and realizing the benign social and econontic development in the countryside in China.
文摘Innovation is the source of modem enterprise profit, is also the fundamental driving force for enterprise development. With the rapid development of knowledge economy, the private economy is more and more important in our national economy. Private enterprises become the main body of the market economy, at the same time, private enterprises in stabling economic growth, promoting international trade, promoting technological progress, reducing unemployment plays a positive role which cannot be substituted. However, private enterprises are existence problems such as lack of innovation resources, and inadequate innovation ability. Therefore, the private enterprise has important practical significance to studying the technological innovation project.
文摘Preparation of tourism development planning should be based on economic and social development plan, and adapt to economic growth and the development of related industries. Tourism development planning should use land planning, regional planning and territorial planning to be related to the overall urban planning coordination, it shall comply with the relevant provisions of the national infrastructure plan. Tourism development planning should be coordinated with scenic spots, nature reserves, cultural and religious sites, cultural relic＇ s protection units and other professional planning. National Tourism Bureau is responsible for organizing the preparation of the national tourism development plan, the development of regional tourism planning across provincial development planning and national priorities identified tourist routes, and tourist areas; local tourism bureau is responsible for organizing the preparation of the administrative region tourism development plan. According to the relevant provisions of the National Tourism Administration Tourism Planning and Design Qualification management, tourism development plan is announced for the preparation of qualification units. Tourism Development Plan prepares for the economic and social development which should be market prospects, resources, environmental factors to conduct a thorough investigation to obtain accurate basic data, it starts from the market demand attention ecological environment and cultural heritage protection and continuation of the positive use of advanced planning methods and techniques.
