From 50 water and sediment samples collected in coastal zone of Haiphong, we have isolated 65 bacterial strains and identification belong to 31 species, 16 gena, 8 families and 2 orders, the genus Bacillus, there are the highest species number - 8 species, Pseudomonas being 5 species and the other genus has only 1 - 2 species. Aerobic bacterial...
15 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 753 | Lượt tải: 0
This study aims at developing an artificial neural network OceanANN in MATLAB to recover missing wave data. The program OceanANN was designed friendly to the user for their convenient and useful interfaces. Based on the Levenberg-Marquardt algorithm, OceanANN was established with 1 input - layer, 2 hidden - layers and 1 output - layer. Each hid...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 737 | Lượt tải: 0
Based on the research results of National project KC09-24/06-10, in this paper we would like to present our experimental calculation results - a program called Phan Thiet Ver. 1.0 - obtained from a physical model with simplified conditions to calculate and predict material (particles) transport in Phan Thiet bay. In the our first version process...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 672 | Lượt tải: 0
In this study, the author present the calculating method and some results studying interaction between frame and coral foundation of Truong Sa archipelago under static loading and earthquake loading simultaneous. The problem analysis with finite element method and using strain plane element (for coral foundation), two nodes beam element (for fr...
10 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 702 | Lượt tải: 0
A study has been carried out to understand the distribution of the net longshore sediment transport rate due to wave action around the Cua Dai (Hoian). Wind data obtained from 6 hourly NCEP/NCAR reanalysis data over the East Sea (South China Sea) was used to estimate the wave characteristics in the offshore and nearshore regions using WAM and S...
16 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 716 | Lượt tải: 0
The characteristics of the tidal regime in coastal areas are formed by the resonance of the astronomical tidal waves transmitted from the ocean in shallow water under the action of horizontal terrain (scale water bodies) and the straight vertical (depth). Thus, sea level rise due to climate change that would alter the depth and scale of the ocea...
7 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 990 | Lượt tải: 0
The priority issues for the integrated management of Vietnam coastal zone have been determined based on the systematic analysis and evaluation of data and information of natural conditions, ecosystems, status and trends of coastal environment and resources; on the status and orientation of coastal socio-economic development; the perspective on ...
9 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 669 | Lượt tải: 0
Series of problems of infiltration and seepage deformation, as well as slope failure of river band and dike of Red River in Hanoi has made the administators and people to be fearful. In history, dike breaks have occurred in many places, influencing on the social-economic situation of the region. The major cause of the above geological hazards is ...
13 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 933 | Lượt tải: 0
This paper presents the model on Nitrogen transformation cycle in the marine ecosystem has been established and used to study on primary productivity in Gulf of Tonkin. In the cycle, the Nitrogen element is transformated through 5 compounds: Phytoplankton, Zooplankton, Dissolved Organic Matter, Amonium and Nitrate. The transformation processes ...
22 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 719 | Lượt tải: 0
Based on phytoplankton data collected in Tonkin Gulf and adjacent from 1959 to 2009, phytoplankton is studied. The total of phytoplankton species has been identified to be 449 species, 100 genuses, 43 families, 10 orders, 4 classes, 4 phylums and be divided into three ecological groups. The biological indexes (diversity index - H’, Evenness inde...
17 trang | Chia sẻ: honghp95 | Ngày: 28/11/2020 | Lượt xem: 954 | Lượt tải: 0
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