A three-dimensional advection-diffusion model coupled with the degradation process is established for describing the transport of chemical oxygen demand (COD). Comparison of the simulated distribution of COD at the su...A three-dimensional advection-diffusion model coupled with the degradation process is established for describing the transport of chemical oxygen demand (COD). Comparison of the simulated distribution of COD at the surface in the Bohai Sea in August, 2001 with field observations, shows that the model simulates the dataset reasonably well. The Laizhou Bay, Bohai Bay, and Liaodong Bay were contaminated heavily near shore. Based on the optimal discharge flux method, the Environmental Capacity (EC) and allocated capacities of COD in the Bohai Sea are calculated. For seawater of Grades I to IV of the Chinese National Standard, the ECs of COD in the Bohai Sea were 77×104 t/a, 116×104 t/a, 154×104 t/a and 193×104 t/a, respectively. The Huanghe (Yellow) River pollutant discharge accounted for the largest percentage of COD at 14.3%, followed by that of from the Liugu River (11.5%), and other nine local rivers below 10%. The COD level in 2005 was worse than that of Grade II seawater and was beyond the environmental capacity. In average, 35% COD reduction is called to meet the standard of Grade I seawater.展开更多
Because women in Taiwan have had more and more opportunities to receive higher education and engage in different kinds of work, they have had developed increasingly higher standards for their marriage partners. Men wh...Because women in Taiwan have had more and more opportunities to receive higher education and engage in different kinds of work, they have had developed increasingly higher standards for their marriage partners. Men who are in the lower socioeconomic working classes such as those who work in agriculture, or fishing, or who are disabled can no longer compete in local marriage market. As a result, these men have begun to look for their brides from other countries to continue the family line, do the housework, and take care of their parents-in-law. In addition to the fact that these foreign brides are often young and from rural areas, language barriers and cultural differences make it difficult for them to raise and educate their children in Taiwan. The inability of these brides often leads to a higher percentage of children who are developmentally delayed, have poor pronunciation, behavior problems, and low academic achievement. Governmental agencies and schools recognize these issues and have tried to help foreign-born mothers take better care of their children. However, there are several influential factors that can limit the cooperative motivation of these foreign-born mothers, including language barriers, parenting stresses, low socioeconomic status, and cultural limitations. Therefore, governmental agencies and related professionals must take these factors into consideration to provide comprehensive services and a better learning environment.展开更多
The monthly changes in chlorophyll a, phytoplankton abundance and physicochemical parameters at two stations in Boka Kotorska Bay were investigated between 2003-2004. Nutrient salts varied widely, with maximum 3.65 μ...The monthly changes in chlorophyll a, phytoplankton abundance and physicochemical parameters at two stations in Boka Kotorska Bay were investigated between 2003-2004. Nutrient salts varied widely, with maximum 3.65 μmol.L^-1 for nitrates and 0.23 μmol.L^-1 for phosphate. Chlorophyll a concentration ranged from 0.25 to 7.63 mg·m^3 and the highest value was measured in winter period of year. It seems that reason for this is the land-based nutrient input into the coastal area here. According to chlorophyll a, nitrates and phosphates concentrations, the area could be oligomesotrophic to mesotrophic during winter.展开更多
During the Cold War,China’s diplomacy failed to treat the Arab states as a whole.It was not until the end of the Cold War that China established diplomatic relations with all 22 Arab states.Since then,a multilateral ...During the Cold War,China’s diplomacy failed to treat the Arab states as a whole.It was not until the end of the Cold War that China established diplomatic relations with all 22 Arab states.Since then,a multilateral cooperation mechanism between China and Arab states has come into existence and become steadily developed.In 2004,the China-Arab States Cooperation Forum was established.In 2010,China and the Arab states announced the establishment of a strategic cooperative relationship.After the Gulf War,the Arab world entered a period of fragmentation and division.The situation deteriorated after the drastic changes in the Middle East in 2011,to the point of entering an era of granulation.The ability of The League of Arab States to operate as a single international actor has been greatly impaired.In the era of the fragmentation of the Arab world,the mechanism of multilateral cooperation between China and the Arab States has developed in spite of these great difficulties.In future,the role and function of the multilateral mechanism of cooperation between China and the Arab states needs to be clarified,and efficiency needs to be improved based on the existing mechanisms.展开更多
A solar still system is designed and built to utilize solar energy in the Gulf States region to produce fresh water from brackish and sea water. This experimental work has been conducted with and without a cooling tub...A solar still system is designed and built to utilize solar energy in the Gulf States region to produce fresh water from brackish and sea water. This experimental work has been conducted with and without a cooling tube. The results showed that the daily production rate of the simple solar still without a cooling tube is slightly higher than that with a cooling tube. This could be due to the fact that the cooling tube has a smaller effective condensation surface area than the glass cover of the simple still. The cooling tube also reduces the solar energy that reaches the water in the still. It might also be due to the fact that the use of a cooling tube has the effect of reducing the average temperature in the solar still cavity. This resulted in reducing the evaporation rate and consequently reduced the production rate.展开更多
基金Supported by 908 Program of the State Ocean Administration of China (Nos.908-02-02-02,908-02-02-03)the State Ocean Administration Foundation of China (No.200805065)
文摘A three-dimensional advection-diffusion model coupled with the degradation process is established for describing the transport of chemical oxygen demand (COD). Comparison of the simulated distribution of COD at the surface in the Bohai Sea in August, 2001 with field observations, shows that the model simulates the dataset reasonably well. The Laizhou Bay, Bohai Bay, and Liaodong Bay were contaminated heavily near shore. Based on the optimal discharge flux method, the Environmental Capacity (EC) and allocated capacities of COD in the Bohai Sea are calculated. For seawater of Grades I to IV of the Chinese National Standard, the ECs of COD in the Bohai Sea were 77×104 t/a, 116×104 t/a, 154×104 t/a and 193×104 t/a, respectively. The Huanghe (Yellow) River pollutant discharge accounted for the largest percentage of COD at 14.3%, followed by that of from the Liugu River (11.5%), and other nine local rivers below 10%. The COD level in 2005 was worse than that of Grade II seawater and was beyond the environmental capacity. In average, 35% COD reduction is called to meet the standard of Grade I seawater.
文摘Because women in Taiwan have had more and more opportunities to receive higher education and engage in different kinds of work, they have had developed increasingly higher standards for their marriage partners. Men who are in the lower socioeconomic working classes such as those who work in agriculture, or fishing, or who are disabled can no longer compete in local marriage market. As a result, these men have begun to look for their brides from other countries to continue the family line, do the housework, and take care of their parents-in-law. In addition to the fact that these foreign brides are often young and from rural areas, language barriers and cultural differences make it difficult for them to raise and educate their children in Taiwan. The inability of these brides often leads to a higher percentage of children who are developmentally delayed, have poor pronunciation, behavior problems, and low academic achievement. Governmental agencies and schools recognize these issues and have tried to help foreign-born mothers take better care of their children. However, there are several influential factors that can limit the cooperative motivation of these foreign-born mothers, including language barriers, parenting stresses, low socioeconomic status, and cultural limitations. Therefore, governmental agencies and related professionals must take these factors into consideration to provide comprehensive services and a better learning environment.
文摘The monthly changes in chlorophyll a, phytoplankton abundance and physicochemical parameters at two stations in Boka Kotorska Bay were investigated between 2003-2004. Nutrient salts varied widely, with maximum 3.65 μmol.L^-1 for nitrates and 0.23 μmol.L^-1 for phosphate. Chlorophyll a concentration ranged from 0.25 to 7.63 mg·m^3 and the highest value was measured in winter period of year. It seems that reason for this is the land-based nutrient input into the coastal area here. According to chlorophyll a, nitrates and phosphates concentrations, the area could be oligomesotrophic to mesotrophic during winter.
文摘During the Cold War,China’s diplomacy failed to treat the Arab states as a whole.It was not until the end of the Cold War that China established diplomatic relations with all 22 Arab states.Since then,a multilateral cooperation mechanism between China and Arab states has come into existence and become steadily developed.In 2004,the China-Arab States Cooperation Forum was established.In 2010,China and the Arab states announced the establishment of a strategic cooperative relationship.After the Gulf War,the Arab world entered a period of fragmentation and division.The situation deteriorated after the drastic changes in the Middle East in 2011,to the point of entering an era of granulation.The ability of The League of Arab States to operate as a single international actor has been greatly impaired.In the era of the fragmentation of the Arab world,the mechanism of multilateral cooperation between China and the Arab States has developed in spite of these great difficulties.In future,the role and function of the multilateral mechanism of cooperation between China and the Arab states needs to be clarified,and efficiency needs to be improved based on the existing mechanisms.
文摘A solar still system is designed and built to utilize solar energy in the Gulf States region to produce fresh water from brackish and sea water. This experimental work has been conducted with and without a cooling tube. The results showed that the daily production rate of the simple solar still without a cooling tube is slightly higher than that with a cooling tube. This could be due to the fact that the cooling tube has a smaller effective condensation surface area than the glass cover of the simple still. The cooling tube also reduces the solar energy that reaches the water in the still. It might also be due to the fact that the use of a cooling tube has the effect of reducing the average temperature in the solar still cavity. This resulted in reducing the evaporation rate and consequently reduced the production rate.
