Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rule...Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes.展开更多
The importance of sleep has been described in proverbs such as “the early bird catches the worm”. However, there are few scientific reports on the effects of early rising. Therefore, early risers (Group E) and late ...The importance of sleep has been described in proverbs such as “the early bird catches the worm”. However, there are few scientific reports on the effects of early rising. Therefore, early risers (Group E) and late risers (Group L) were compared and the number and ratio of leukocytes, body temperature, glucose and its associated hormones were studied. Furthermore, each group was divided into two groups by the duration of sleep and the following four groups were compared: early risers with short sleep (Group E-S);early risers with long sleep (Group E-L);late risers with short sleep (Group L-S);and late risers with long sleep (Group L-L). Then, compared with Group L, Group E showed lower numbers and ratio of granulocytes and a higher ratio of lymphocytes showing parasympathetic nerve dominance. Group E showed higher levels of glucose and its related hormones than Group L, indicating sympathetic nerve dominance. Compared with Groups E-S and L-S, Groups E-L and L-L showed lower glucose and cortisol levels, respectively. These results indicated that early rising might affect leukocyte subsets, and adequate duration of sleep could decrease levels of glucose via modification of the autonomic nervous system.展开更多
There has been no decline but rather a rise in foreign investment in China since the China-US trade dispute started earlier this year.In the first10months of this year,49,545new foreign-invested enterprises were set u...There has been no decline but rather a rise in foreign investment in China since the China-US trade dispute started earlier this year.In the first10months of this year,49,545new foreign-invested enterprises were set up nationwide,up89.3%over the same period last year,data from the Ministry of Commerce(MOC)showed.展开更多
Since July 2010,the prices of geographical indication products have risen with the occurrence of inflation.In contrast with other products,geographical indication products are distinct.The increasing prices of geograp...Since July 2010,the prices of geographical indication products have risen with the occurrence of inflation.In contrast with other products,geographical indication products are distinct.The increasing prices of geographical indication goods have their own necessities.From the perspective of the products,they are equipped with appreciation potential due to the cultural pe culiarities.From the historical standpoint,their prices have not been high as well as other agricultural products.Realistically,the increase in their prices results from the costs of labors and raw materials.Therefore,the prices of geographical indication products rise to catch up.Not only are their prices at a reasonable level,but also they are beneficial to increase peasants'income.In con clusion,it is necessary that the strategies which are different from those of other products be adopted to regulate and control the prices of geographical indication products.展开更多
Experiments were carried out on carburizing and temperature rising of the semi-steel melt in a plasma induction furnace.Influence of many factors,such as power supply mode,position of the plasma torch and bottom-blown...Experiments were carried out on carburizing and temperature rising of the semi-steel melt in a plasma induction furnace.Influence of many factors,such as power supply mode,position of the plasma torch and bottom-blown-gas stirring,on heating efficiency and melt temperature distribution was studied.Melt temperature could be effectively controlled by plasma heating,and carbon content of semi-steel melt increased from 1.92%to 4.58%,and the utilization rate of carbon reached up to 61.57%during carburizing of the melt.展开更多
Growth and energy budget of marine amphipod juvenile Eogammarus possjeticus at different temperatures(20℃,24℃,26℃,28℃,30℃,32℃ and 34℃)were investigated in this study.The results showed that the cumulative morta...Growth and energy budget of marine amphipod juvenile Eogammarus possjeticus at different temperatures(20℃,24℃,26℃,28℃,30℃,32℃ and 34℃)were investigated in this study.The results showed that the cumulative mortality rate increased significantly with rising temperature(p<0.01),and exceeded 50%after 24 h when temperature was above 30℃.With the temperature increasing from 20℃ to 26℃,the ingestion rate and absorption rate increased,but decreased significantly above 28℃(p<0.01),indicating a decline in feeding ability at high temperatures.The specific growth rate increased with rising temperature,but decreased significantly(p<0.01)after reaching the maximum value at 24℃.Similarly,the oxygen consumption and ammonia emission rates also showed a trend of first increase and then decrease.However,the O:N ratio decreased first and then increased with rising temperature,indicating that the energy demand of E.possjeticus juvenile transferred from metabolism of carbohydrate and lipid to protein.In the energy distribution of amphipods,the proportion of each energy is different.With rising temperature,the ratio of the energy deposited for growth accounted for ingested gross energy showing a trend of decrease,while the energy lost to respiration,ammonia excretion,and feces accounted for ingested gross energy being showed a trend of increase.It seemed that rising temperature increased the metabolism and energy consumption of the amphipods and,meanwhile,decreased the energy used for growth,which may be an important reason for the slow growth and small body size of the amphipods during the summer high-temperature period.展开更多
Precision engineering is the discipline that encompasses the design,development,fabrication,and measurement of parts of a mechanical,optical,or electronic system,in software or in fixtures and other structures.For exa...Precision engineering is the discipline that encompasses the design,development,fabrication,and measurement of parts of a mechanical,optical,or electronic system,in software or in fixtures and other structures.For example,a precision instrument or machine should be able to function or perform at a high accuracy that is many orders of magnitude smaller than the size of the instrument or machine itself.It is critical that such accuracy and accurate performance are repeatable and stable over a designated period.Precision engineering also involves the generation of new knowledge-bases and creation of new technologies which will advance the innovation of such machines,instruments,or systems.展开更多
In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extende...In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extended binomial coefficients,and the Stirling numbers of the first and second kinds.These results are new,interesting,important,useful,and applicable in combinatorial number theory.展开更多
Background:Predicting the possibility of severe effects of global warming on animals is important for understanding the ecological consequences of climate change on ecosystem.Spring is the season during which birds ha...Background:Predicting the possibility of severe effects of global warming on animals is important for understanding the ecological consequences of climate change on ecosystem.Spring is the season during which birds have to physiologically prepare for the subsequent breeding period,and unusual spring temperature rising probably becomes a heat stress to the birds which have adapted to the low spring temperature.Therefore,it is necessary to understand the physiological effect of spring warming on the temperate birds.Methods:Using the activities of blood anti-oxidative enzymes(SOD,CAT,GPx)and the concentrations of serum immunogloblins(IgA,IgY,IgM)as indicators,we compared the anti-oxidative and immune functions of Asian Shorttoed Larks(Calandrella cheleensis)captured between 10 and 15 March,2015 and housed under conditions of 21°C and 16°C.Results:The SOD activities of birds in 21°C group were significantly lower than those in 16°C group on all the treatment days.The CAT activities of the birds in 21°C group were significantly lower than those in 16°C group on the 1 st,5 th,13 th,17 treatment days.The GPx activities of the birds in 21°C group were signifthicantly lower than those in 16°C group on the 1 st,13 th and 17 th,but significantly higher on the 21 st treatment day.The IgA,IgY and IgM concentrations of birds in 21°C group were significantly lower than those in 16°C group on all the treatment days.Conclusions:This study shows that spring temperature rising negatively influences antioxibative and humoral immune functions,which indicates that spring climate warming might reduce the fitness of the temperate passerine birds which have adapted to the low spring temperature.展开更多
This paper examines the rise in the level of the groundwater in the Quaternary aquifer at Aswan city, Upper Egypt. Since the 1960’s, the areal extent of Aswan City and the urban populations are growing at a high pace...This paper examines the rise in the level of the groundwater in the Quaternary aquifer at Aswan city, Upper Egypt. Since the 1960’s, the areal extent of Aswan City and the urban populations are growing at a high pace which introduces new sources of water that increase groundwater recharge. As a result of leakages or infiltrations from different sources, the natural groundwater balance is overturned into an unbalance where the input to water table is comparatively much more than the natural groundwater flow towards the Nile River. The present study shows a variation in the groundwater level, from 1971 up to 2014, where the water table rising ranges between 12.55 and 13.69 m. Also, it shows an abrupt increase in the water levels in 2010 continuing up till now. The groundwater rising phenomena that happened in 2010 can be directly refereed to the cessation of groundwater pumping from El-Shallal wells, and to the reduction of pumping from KIMA factory wells. Generally, the rate of water rising is much higher in the western side of the city and in Kima factory area, where they are characterized by low relief and dense population. The most troublesome groundwater mounds under urban areas are likely to develop in low-lying areas of relatively high permeability aquifer, which is not exploited for water supply. These damages will become more widespread if the rising groundwater table remains uncontrolled.?The environmental impact of the water rising includes: forming ponds in low lying areas (Kima and El Shallal ponds), flooding building’s basements, and inundating underground infrastructure.?A general deterioration in groundwater quality was identified.展开更多
Along with the progress in breadth and depth of international arms controland disarmament, US-led Western nations are increasingly in need of China’s co-operation. They began to seek consultations and coordination wi...Along with the progress in breadth and depth of international arms controland disarmament, US-led Western nations are increasingly in need of China’s co-operation. They began to seek consultations and coordination with China. This hasled to China’ s bigger say and rising role in international arms control.展开更多
Wehave the very reason to believe, one month later, afterthe last piece of British Union Jack flag has no choicebut to be lowered down at the twilight, with the risingbright Five5tar Red Flag, will come the first beam...Wehave the very reason to believe, one month later, afterthe last piece of British Union Jack flag has no choicebut to be lowered down at the twilight, with the risingbright Five5tar Red Flag, will come the first beam of sun light,marking the beginning of a new epoch in Hong Kong.With only one month to go, the return of Hong Kong hasalready become the hottest topic. Everyone has been quite acquaintedwith the situation, has got something to speak about, and展开更多
Through the analysis of the reservoir connection relationship and the water-cut rising rules after water breakthrough in the highly volatile oil AKPO oilfield, a new model of water-cut rising was established, and the ...Through the analysis of the reservoir connection relationship and the water-cut rising rules after water breakthrough in the highly volatile oil AKPO oilfield, a new model of water-cut rising was established, and the timing and strategy of water injection were put forward. The water-cut rising shapes of producers after water breakthrough can be divided into three types, and their water-cut rising mechanism is mainly controlled by reservoir connectivity. For the producers which directly connect with injectors in the single-phase sand body of the single-phase channel or lobe with good reservoir connectivity, the water-cut rising curve is "sub-convex". For the producers which connect with injectors through sand bodies developed in multi-phases with good inner sand connectivity but poorer physical property and connectivity at the overlapping parts of sands, the response to water injection is slow and the water-cut rising curve is "sub-concave". For the producers which connect with injectors through multi-phase sand bodies with reservoir physical properties, connectivity in between the former two and characteristics of both direct connection and overlapping connection, the response to water injection is slightly slower and the water-cut rising curve is "sub-S". Based on ratio relationship of oil and water relative permeability, a new model of water cut rising was established. Through the fitting analysis of actual production data, the optimal timing and corresponding technology for water injection after water breakthrough were put forward. Composite channel and lobe reservoirs can adopt water injection strategies concentrating on improving the vertical sweep efficiency and areal sweep efficiency respectively. This technology has worked well in the AKPO oilfield and can guide the development of similar oilfields.展开更多
Wenzhou is situated in the mid section of Chinese coast line. The Ou river dissects its northern and suburban areas. It is on the East Sea with the advantages of the western Pacific and the Chinese southeastern coast....Wenzhou is situated in the mid section of Chinese coast line. The Ou river dissects its northern and suburban areas. It is on the East Sea with the advantages of the western Pacific and the Chinese southeastern coast. It is the economic, cultural and traffic centre of the southern part of Zhejiang province, connecting the vast hinterland of Fujian, Jiangxi, Hubei and Hunan provinces.展开更多
<strong>Background:</strong><span style="font-family:""><span style="font-family:Verdana;"> Teenage pregnancy is a major public health problem worldwide, also in northe...<strong>Background:</strong><span style="font-family:""><span style="font-family:Verdana;"> Teenage pregnancy is a major public health problem worldwide, also in northern Ghana. The aim of this study was to identify factors contributing to the rising trend in teenage pregnancy and the resultant effects. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was a cross-sectional study using a quasi-structured questionnaire on 60 pregnant teenagers. Demographic data and factors associated with teenage pregnancy were collected/analyzed. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> The mean age of respondents was 17.25 ± 1.93 years. Junior high school students or graduates accounted for 55%. About 35% of participants dropped out of school due to pregnancy. The following factors were identified to be associated with teenage pregnancy: low socio-economic status, no/less sexual- and reproductive-communication with parents, low level of education, no sexual and reproductive health knowledge, and unsafe sexual behaviours. The consequences of teenage pregnancy identified were: truncation of the girls’ education, psychological trauma, and worsening family relationships. The following health consequences were identified;anaemia in pregnancy, severe malaria, hypertension in pregnancy, and prolonged labour. </span><b><span style="font-family:Verdana;">Conclusion: </span></b><span style="font-family:Verdana;">The following factors may account for the rising trend in teenage pregnancy in this area: family-related problem, sociocultural factors, low education level, and the lack of adequate knowledge on reproductive health. Teenage pregnancy caused several problems in themselves and their family members.</span></span>展开更多
Late rising in pacing threshold is an uncommon complication of permanent pacing. Treatment with high dose systemic steroid could spare the patient another procedure. We report a case of late rising pacing threshold th...Late rising in pacing threshold is an uncommon complication of permanent pacing. Treatment with high dose systemic steroid could spare the patient another procedure. We report a case of late rising pacing threshold that responded to high dose sys-temic steroid which lowered the pacing threshold to one volt, then rose again to around 2 volts.展开更多
Since Modi took office as Indian prime minister in 2014,India has quickened its pace toward great power status.Although the Indian government did not issue relevant documents and did not systematically give official s...Since Modi took office as Indian prime minister in 2014,India has quickened its pace toward great power status.Although the Indian government did not issue relevant documents and did not systematically give official statements,from the perspective of Modi’s domestic and foreign policies the outline of its strategy of rising as a great power展开更多
There is a small island in the north of the Brunei Bay and south of South China Sea,with an area of only92sq.m.It is described as one of the most mystical places of Asia,surrounded by coral reef with beautiful sands b...There is a small island in the north of the Brunei Bay and south of South China Sea,with an area of only92sq.m.It is described as one of the most mystical places of Asia,surrounded by coral reef with beautiful sands beaches and elegant maritime scenery.This island is called as the“garden island”of Borneo.There are also four sunken ships at the bottom of the sea area,bringing challenges and excitement to the adventurous divers.展开更多
基金Supported by the National Natural Science Foundation of China(21276132)the Transformation Project of Scientific and Technological Achievements of Qingdao(16-6-2-50-nsh)
文摘Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes.
文摘The importance of sleep has been described in proverbs such as “the early bird catches the worm”. However, there are few scientific reports on the effects of early rising. Therefore, early risers (Group E) and late risers (Group L) were compared and the number and ratio of leukocytes, body temperature, glucose and its associated hormones were studied. Furthermore, each group was divided into two groups by the duration of sleep and the following four groups were compared: early risers with short sleep (Group E-S);early risers with long sleep (Group E-L);late risers with short sleep (Group L-S);and late risers with long sleep (Group L-L). Then, compared with Group L, Group E showed lower numbers and ratio of granulocytes and a higher ratio of lymphocytes showing parasympathetic nerve dominance. Group E showed higher levels of glucose and its related hormones than Group L, indicating sympathetic nerve dominance. Compared with Groups E-S and L-S, Groups E-L and L-L showed lower glucose and cortisol levels, respectively. These results indicated that early rising might affect leukocyte subsets, and adequate duration of sleep could decrease levels of glucose via modification of the autonomic nervous system.
文摘There has been no decline but rather a rise in foreign investment in China since the China-US trade dispute started earlier this year.In the first10months of this year,49,545new foreign-invested enterprises were set up nationwide,up89.3%over the same period last year,data from the Ministry of Commerce(MOC)showed.
文摘Since July 2010,the prices of geographical indication products have risen with the occurrence of inflation.In contrast with other products,geographical indication products are distinct.The increasing prices of geographical indication goods have their own necessities.From the perspective of the products,they are equipped with appreciation potential due to the cultural pe culiarities.From the historical standpoint,their prices have not been high as well as other agricultural products.Realistically,the increase in their prices results from the costs of labors and raw materials.Therefore,the prices of geographical indication products rise to catch up.Not only are their prices at a reasonable level,but also they are beneficial to increase peasants'income.In con clusion,it is necessary that the strategies which are different from those of other products be adopted to regulate and control the prices of geographical indication products.
文摘Experiments were carried out on carburizing and temperature rising of the semi-steel melt in a plasma induction furnace.Influence of many factors,such as power supply mode,position of the plasma torch and bottom-blown-gas stirring,on heating efficiency and melt temperature distribution was studied.Melt temperature could be effectively controlled by plasma heating,and carbon content of semi-steel melt increased from 1.92%to 4.58%,and the utilization rate of carbon reached up to 61.57%during carburizing of the melt.
基金The Youth Talent Support Program of the Laboratory for Marine Ecology and Environmental SciencePilot National Laboratory for Marine Science and Technology(Qingdao)under contract No.LMEESYTSP-2018-04-02+3 种基金the Creative Team Project of the Laboratory for Marine Ecology and Environmental SciencePilot National Laboratory for Marine Science and Technology(Qingdao)under contract No.LMEES-CTSP-2018-4the Central Public-interest Scientific Institution Basal Research FundCAFS under contract No.2020TD50。
文摘Growth and energy budget of marine amphipod juvenile Eogammarus possjeticus at different temperatures(20℃,24℃,26℃,28℃,30℃,32℃ and 34℃)were investigated in this study.The results showed that the cumulative mortality rate increased significantly with rising temperature(p<0.01),and exceeded 50%after 24 h when temperature was above 30℃.With the temperature increasing from 20℃ to 26℃,the ingestion rate and absorption rate increased,but decreased significantly above 28℃(p<0.01),indicating a decline in feeding ability at high temperatures.The specific growth rate increased with rising temperature,but decreased significantly(p<0.01)after reaching the maximum value at 24℃.Similarly,the oxygen consumption and ammonia emission rates also showed a trend of first increase and then decrease.However,the O:N ratio decreased first and then increased with rising temperature,indicating that the energy demand of E.possjeticus juvenile transferred from metabolism of carbohydrate and lipid to protein.In the energy distribution of amphipods,the proportion of each energy is different.With rising temperature,the ratio of the energy deposited for growth accounted for ingested gross energy showing a trend of decrease,while the energy lost to respiration,ammonia excretion,and feces accounted for ingested gross energy being showed a trend of increase.It seemed that rising temperature increased the metabolism and energy consumption of the amphipods and,meanwhile,decreased the energy used for growth,which may be an important reason for the slow growth and small body size of the amphipods during the summer high-temperature period.
文摘Precision engineering is the discipline that encompasses the design,development,fabrication,and measurement of parts of a mechanical,optical,or electronic system,in software or in fixtures and other structures.For example,a precision instrument or machine should be able to function or perform at a high accuracy that is many orders of magnitude smaller than the size of the instrument or machine itself.It is critical that such accuracy and accurate performance are repeatable and stable over a designated period.Precision engineering also involves the generation of new knowledge-bases and creation of new technologies which will advance the innovation of such machines,instruments,or systems.
基金supported in part by the National Natural Science Foundation of China(Grant No.12061033)by the Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region(Grants No.NJZY20119)by the Natural Science Foundation of Inner Mongolia(Grant No.2019MS01007),China.
文摘In the paper,the authors collect,discuss,and find out several connections,equivalences,closed-form formulas,and combinatorial identities concerning partial Bell polynomials,falling factorials,rising factorials,extended binomial coefficients,and the Stirling numbers of the first and second kinds.These results are new,interesting,important,useful,and applicable in combinatorial number theory.
基金supported by the National Natural Science Foundation of China(No.31872246)。
文摘Background:Predicting the possibility of severe effects of global warming on animals is important for understanding the ecological consequences of climate change on ecosystem.Spring is the season during which birds have to physiologically prepare for the subsequent breeding period,and unusual spring temperature rising probably becomes a heat stress to the birds which have adapted to the low spring temperature.Therefore,it is necessary to understand the physiological effect of spring warming on the temperate birds.Methods:Using the activities of blood anti-oxidative enzymes(SOD,CAT,GPx)and the concentrations of serum immunogloblins(IgA,IgY,IgM)as indicators,we compared the anti-oxidative and immune functions of Asian Shorttoed Larks(Calandrella cheleensis)captured between 10 and 15 March,2015 and housed under conditions of 21°C and 16°C.Results:The SOD activities of birds in 21°C group were significantly lower than those in 16°C group on all the treatment days.The CAT activities of the birds in 21°C group were significantly lower than those in 16°C group on the 1 st,5 th,13 th,17 treatment days.The GPx activities of the birds in 21°C group were signifthicantly lower than those in 16°C group on the 1 st,13 th and 17 th,but significantly higher on the 21 st treatment day.The IgA,IgY and IgM concentrations of birds in 21°C group were significantly lower than those in 16°C group on all the treatment days.Conclusions:This study shows that spring temperature rising negatively influences antioxibative and humoral immune functions,which indicates that spring climate warming might reduce the fitness of the temperate passerine birds which have adapted to the low spring temperature.
文摘This paper examines the rise in the level of the groundwater in the Quaternary aquifer at Aswan city, Upper Egypt. Since the 1960’s, the areal extent of Aswan City and the urban populations are growing at a high pace which introduces new sources of water that increase groundwater recharge. As a result of leakages or infiltrations from different sources, the natural groundwater balance is overturned into an unbalance where the input to water table is comparatively much more than the natural groundwater flow towards the Nile River. The present study shows a variation in the groundwater level, from 1971 up to 2014, where the water table rising ranges between 12.55 and 13.69 m. Also, it shows an abrupt increase in the water levels in 2010 continuing up till now. The groundwater rising phenomena that happened in 2010 can be directly refereed to the cessation of groundwater pumping from El-Shallal wells, and to the reduction of pumping from KIMA factory wells. Generally, the rate of water rising is much higher in the western side of the city and in Kima factory area, where they are characterized by low relief and dense population. The most troublesome groundwater mounds under urban areas are likely to develop in low-lying areas of relatively high permeability aquifer, which is not exploited for water supply. These damages will become more widespread if the rising groundwater table remains uncontrolled.?The environmental impact of the water rising includes: forming ponds in low lying areas (Kima and El Shallal ponds), flooding building’s basements, and inundating underground infrastructure.?A general deterioration in groundwater quality was identified.
文摘Along with the progress in breadth and depth of international arms controland disarmament, US-led Western nations are increasingly in need of China’s co-operation. They began to seek consultations and coordination with China. This hasled to China’ s bigger say and rising role in international arms control.
文摘Wehave the very reason to believe, one month later, afterthe last piece of British Union Jack flag has no choicebut to be lowered down at the twilight, with the risingbright Five5tar Red Flag, will come the first beam of sun light,marking the beginning of a new epoch in Hong Kong.With only one month to go, the return of Hong Kong hasalready become the hottest topic. Everyone has been quite acquaintedwith the situation, has got something to speak about, and
基金Supported by the China National Science and Technology Major Project(2011ZX05030-005)
文摘Through the analysis of the reservoir connection relationship and the water-cut rising rules after water breakthrough in the highly volatile oil AKPO oilfield, a new model of water-cut rising was established, and the timing and strategy of water injection were put forward. The water-cut rising shapes of producers after water breakthrough can be divided into three types, and their water-cut rising mechanism is mainly controlled by reservoir connectivity. For the producers which directly connect with injectors in the single-phase sand body of the single-phase channel or lobe with good reservoir connectivity, the water-cut rising curve is "sub-convex". For the producers which connect with injectors through sand bodies developed in multi-phases with good inner sand connectivity but poorer physical property and connectivity at the overlapping parts of sands, the response to water injection is slow and the water-cut rising curve is "sub-concave". For the producers which connect with injectors through multi-phase sand bodies with reservoir physical properties, connectivity in between the former two and characteristics of both direct connection and overlapping connection, the response to water injection is slightly slower and the water-cut rising curve is "sub-S". Based on ratio relationship of oil and water relative permeability, a new model of water cut rising was established. Through the fitting analysis of actual production data, the optimal timing and corresponding technology for water injection after water breakthrough were put forward. Composite channel and lobe reservoirs can adopt water injection strategies concentrating on improving the vertical sweep efficiency and areal sweep efficiency respectively. This technology has worked well in the AKPO oilfield and can guide the development of similar oilfields.
文摘Wenzhou is situated in the mid section of Chinese coast line. The Ou river dissects its northern and suburban areas. It is on the East Sea with the advantages of the western Pacific and the Chinese southeastern coast. It is the economic, cultural and traffic centre of the southern part of Zhejiang province, connecting the vast hinterland of Fujian, Jiangxi, Hubei and Hunan provinces.
文摘<strong>Background:</strong><span style="font-family:""><span style="font-family:Verdana;"> Teenage pregnancy is a major public health problem worldwide, also in northern Ghana. The aim of this study was to identify factors contributing to the rising trend in teenage pregnancy and the resultant effects. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was a cross-sectional study using a quasi-structured questionnaire on 60 pregnant teenagers. Demographic data and factors associated with teenage pregnancy were collected/analyzed. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> The mean age of respondents was 17.25 ± 1.93 years. Junior high school students or graduates accounted for 55%. About 35% of participants dropped out of school due to pregnancy. The following factors were identified to be associated with teenage pregnancy: low socio-economic status, no/less sexual- and reproductive-communication with parents, low level of education, no sexual and reproductive health knowledge, and unsafe sexual behaviours. The consequences of teenage pregnancy identified were: truncation of the girls’ education, psychological trauma, and worsening family relationships. The following health consequences were identified;anaemia in pregnancy, severe malaria, hypertension in pregnancy, and prolonged labour. </span><b><span style="font-family:Verdana;">Conclusion: </span></b><span style="font-family:Verdana;">The following factors may account for the rising trend in teenage pregnancy in this area: family-related problem, sociocultural factors, low education level, and the lack of adequate knowledge on reproductive health. Teenage pregnancy caused several problems in themselves and their family members.</span></span>
文摘Late rising in pacing threshold is an uncommon complication of permanent pacing. Treatment with high dose systemic steroid could spare the patient another procedure. We report a case of late rising pacing threshold that responded to high dose sys-temic steroid which lowered the pacing threshold to one volt, then rose again to around 2 volts.
文摘Since Modi took office as Indian prime minister in 2014,India has quickened its pace toward great power status.Although the Indian government did not issue relevant documents and did not systematically give official statements,from the perspective of Modi’s domestic and foreign policies the outline of its strategy of rising as a great power
文摘There is a small island in the north of the Brunei Bay and south of South China Sea,with an area of only92sq.m.It is described as one of the most mystical places of Asia,surrounded by coral reef with beautiful sands beaches and elegant maritime scenery.This island is called as the“garden island”of Borneo.There are also four sunken ships at the bottom of the sea area,bringing challenges and excitement to the adventurous divers.
