LuanVan.net.vn - Luận văn, đồ án, tiểu luận, luận án, đề tài, đề án, chuyên đề thực tập, tốt nghiệp

Lý thuyết tối ưu vecto được hình thành từ ý tưởng về cân bằng kinh tế, lý thuyết giá trị của Edgeworth năm 1881 và Pareto năm 1909. Nhưng từ những năm 1950 trở lại đây, sau những công trình của Kuhn - Tucker năm 1951, về giá trị cân bằng và tối ưu Pareto của Debreu năm 1954, lý thuyết tối ưu vecto mới thực sự được chào đón như một ngành mới của toá...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1496 | Lượt tải: 0

Reproductive tract infections (RTIs) is one of the most common disease of reproductive age women. This disease imposes negative impacts on reproductive health, working and quality of life of women. According to the World Health Organization (WHO), there are about 50% of reproductive age women have RTIs, mainly focus in developing countries. In...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1437 | Lượt tải: 0

Xuan Son National Park located in the territory of Tan Son district, Phu Tho Province has a relatively abundant and diversified forest ecosystem of the North of Viet Nam in particular and Vietnam in general. With the tropical and subtropical forests here, there are quite a lot of rare plant and animal species existing and typical for the north...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1720 | Lượt tải: 0

The Circular 35/2010/MARD has introduced an additional list of forest trees which can be lucratively planted and produced in 63 poor districts of 21 provinces. This list included both timber and non-timber product species. Further, the Resolution 30 A/2008/NQCP of Prime Minister has determined Phay (Duabanga grandiflora Roxb.Ex DC) as one of pri...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1577 | Lượt tải: 0

The main fruit trees of Vietnam are orange, mandarin, lemon and pomelo trees that have a long history of development and have been planted throughout the ecoregions nationwide. In the past many decades, citrus fruit remains one of the key export products and demand of domestic consumption is very large (Hoang Ngoc Thuan, 2004). The study of de...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1517 | Lượt tải: 0

Throughout the history, the relationship between the folk literature and written literature has drawn the attention of many domestic and foreign scientists. The attention not only focuses on the theoretical aspect but also specific and lively actual surveys. However, it can be said that the relationship between the folk literature and written ...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1553 | Lượt tải: 1

Literature of Vietnamese ethnic minorities includes literary writings of minority writers focusing on the theme of mountainous culture and the lives of ethnic minorities in all regions of the country. The literature of ethnic minorities also has a particularly important position in the history of modern Vietnam literature - a literature of 54 ...

28 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1476 | Lượt tải: 0

The process of heat transfer or diffusion are often modelled by boundary value problems for parabolic equations: when the physical domain, the coefficients of equations, the initial condition and boundary conditions are known, one studies the boundary value problems and then bases on them to predict about the processes under consideration. This...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1585 | Lượt tải: 1

Tourism is growing rapidly, bringing high socio - economic and environmental efficiency of many countries in over the world. Tourism has become the key economic sector in Viet Nam thanks to divers and abundant tourism resource. The fact of tourism growth in our country shows that a proper and judicious evaluating and exploitating not only promote e...

25 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1589 | Lượt tải: 0

Cau river watershed - Bac Kan province locates on the territory of four districts and towns: Cho Don, Bach Thong, Cho Moi and Bac Kan. The terrain there is high, mountainous, steep and dissected. In watershed area of Cau river - Bac Kan province, an area of 21,996.8 hectares of land is without forest (Bac Kan province, 2010). Scientific basis ...

27 trang | Chia sẻ: lecuong1825 | Ngày: 15/07/2016 | Lượt xem: 1444 | Lượt tải: 0