• Bài giảng Xác suất thống kê - Chương 3: Biến ngẫu nhiên nhiều chiều - Lê Xuân LýBài giảng Xác suất thống kê - Chương 3: Biến ngẫu nhiên nhiều chiều - Lê Xuân Lý

    + Ở chương trước chúng ta quan tâm đến xác suất của biến ngẫu nhiên riêng rẽ. Nhưng trong thực tế nhiều khi ta phải xét đồng thời nhiều biến khác nhau có quan | hệ tương hỗ (ví dụ khi nghiên cứu về sinh viên một trường đại học thì cần quan tâm đến chiều cao, cân nặng, tuổi, .). Do đó dẫn đến khái niệm biến ngẫu nhiên nhiều chiều hay véctơ ngẫu nh...

    pdf16 trang | Chia sẻ: thuyduongbt11 | Ngày: 11/06/2022 | Lượt xem: 725 | Lượt tải: 0

  • Status assessment and solutions of management to domestic solid wastes in Ha NoiStatus assessment and solutions of management to domestic solid wastes in Ha Noi

    The amount of domestic solid waste in 4 wards of Dich Vong, Dich Vong Hau, Nghia Do, Cau Giay, Ha Noi city is about 153 tons per day, in which, 90% of it is collected. In average, waste generation coefficient per one person is 0,52 kg/person/day. This study contributes to giving solutions of solid wastes management in larger scale in Ha Noi Cit...

    pdf9 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 392 | Lượt tải: 0

  • A mathematical model to optimize the location planning of future water supply factories in can tho city and neighbor districts with maintaining present accessibilityA mathematical model to optimize the location planning of future water supply factories in can tho city and neighbor districts with maintaining present accessibility

    Environmental pollution and the increasing complexity in migration have put a lot of pressure on the planning of domestic water supply systems in the big cities. With the desire of building a highly reliable scientific base in future water supply network decision-making, this paper proposes a two-step approach with a minimum number of future d...

    pdf8 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 810 | Lượt tải: 0

  • Water quality assessment using water quality index: A case of the ray river, vietnamWater quality assessment using water quality index: A case of the ray river, vietnam

    The Ray River is a critical surface water system which serves for domestic, industrial and agricultural activities running through Dong Nai province, and Ba Ria - Vung Tau province, located in Southeast region in Vietnam. The water quality of the river has increasingly gained attention among scholars due to seriously threatened by effluents fro...

    pdf10 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 337 | Lượt tải: 0

  • Study of application of wastewater treatment process technology in enrichment and melting tinStudy of application of wastewater treatment process technology in enrichment and melting tin

    Effect of catalytics on wastewater treatment of enrichment and melting tin at Thai Nguyen Mine and Metallurgy Co.ltd was reported in this research. Treatment effect is characterized using different analytical techiques such as Atomic Absorption Spectrometric (AAS), Atomic Emission Spectroscopy (AES), total organic carbon analysis. The result s...

    pdf8 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 463 | Lượt tải: 0

  • International Experiences with Policy Instruments for Mobilizing Private Sector in Emission ReductionInternational Experiences with Policy Instruments for Mobilizing Private Sector in Emission Reduction

    Reducing greenhouse gas emissions to limit global temperature rise in this century to less than 2°C above pre-industrial levels was identified as a global task at the 2015 Paris Agreement. However, this task which requires huge resources is a challenge for all countries. In fact, besides the state resources, the private sector in many countries ...

    pdf12 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 397 | Lượt tải: 0

  • Policy and Legislations on Microplastics Pollution Management in VietnamPolicy and Legislations on Microplastics Pollution Management in Vietnam

    Plastic pollution has become a major global environmental problem. The amount of plastic waste, including microplastics discharged into the environment, is on the increase, causing harm to the environment, ecosystems, especially marine ecosystems, entering the food chain, and affecting human health. Recognizing the environmental risks of plastic...

    pdf8 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 345 | Lượt tải: 0

  • Bài giảng Xác suất thống kê - Chương 5: Kiểm định giả thuyết - Lê Xuân LýBài giảng Xác suất thống kê - Chương 5: Kiểm định giả thuyết - Lê Xuân Lý

    Kiểm định giả thuyết cho kỳ vọng • Giả thuyết thống kê: Trong nhiều lĩnh vực của đời sống kinh tế xã hội, chúng ta thường nêu ra các nhận xét khác nhau về đối tượng quan tâm. Những nhận xét như vậy có thể đứng hoặc sai. Vấn đề kiểm tra tính đúng sai của nhận xét sẽ được gọi là kiểm định. © Kiểm định giả thuyết là bài toán để xác định có nên chấp...

    pdf17 trang | Chia sẻ: thuyduongbt11 | Ngày: 11/06/2022 | Lượt xem: 623 | Lượt tải: 0

  • Developing Social-Ecological System Approach and a Case Study in Red River DeltaDeveloping Social-Ecological System Approach and a Case Study in Red River Delta

    After 3 decades of sustainable development, Vietnam's development is still not sustainable, especially in terms of society and ecology, the economy is still a brown economy: low product quality, high consumption resources, causing environmental pollution, increasing greenhouse gas emissions – causing climate change, and other social issues. In t...

    pdf15 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 339 | Lượt tải: 0

  • The Process of Sustainable Development and the Linkage to the Social - Ecological Transformation in the World and in VietnamThe Process of Sustainable Development and the Linkage to the Social - Ecological Transformation in the World and in Vietnam

    Sustainable development is a global trend to build a prosperous society, especially to promote green growth towards ecological approach and based on sustainable use of natural resources in the context of climate change. This article, therefore, is an attempt to synthesize the sustainable development process in the world, from the initial awarene...

    pdf13 trang | Chia sẻ: thanhuyen291 | Ngày: 11/06/2022 | Lượt xem: 404 | Lượt tải: 0