This study aims to formulate a steady-state mathematical model for a three-dimensional permeable enclosure(cavity)to determine the oil extraction rate using three distinct nanoparticles,SiO_(2),Al_(2)O_(3),and Fe_(2)O...This study aims to formulate a steady-state mathematical model for a three-dimensional permeable enclosure(cavity)to determine the oil extraction rate using three distinct nanoparticles,SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3),in unconventional oil reservoirs.The simulation is conducted for different parameters of volume fractions,porosities,and mass flow rates to determine the optimal oil recovery.The impact of nanoparticles on relative permeability(kr)and water is also investigated.The simulation process utilizes the finite volume ANSYS Fluent.The study results showed that when the mass flow rate at the inlet is low,oil recovery goes up.In addition,they indicated that silicon nanoparticles are better at getting oil out of the ground(i.e.,oil reservoir)than Al_(2)O_(3)and Fe_(2)O_(3).Most oil can be extracted from SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3)at a rate of 97.8%,96.5%,and 88%,respectively.展开更多
APU(Auxiliary Power Unit)辅助动力装置作为民航飞机上不可缺少的系统之一,对飞机起着非常重要的作用。APU的失效、使用困难,将会给飞机的安全和使用带来严重的影响。特别是对那些航班的周转量比较高,或者地面保障设施资源比较紧张的机...APU(Auxiliary Power Unit)辅助动力装置作为民航飞机上不可缺少的系统之一,对飞机起着非常重要的作用。APU的失效、使用困难,将会给飞机的安全和使用带来严重的影响。特别是对那些航班的周转量比较高,或者地面保障设施资源比较紧张的机场,极有可能会直接造成航班的延误。本文针对APU常见故障类型及维护进行总结。展开更多
In this article, we obtain the LP-boundedness of commutators of Lipschitz functions and singular integrals with non-smooth kernels on Euclidean spaces.
Background： DHF （dengue hemorrhagic fever） is an infectious disease that is caused by dengue virus. To date no specific medicine is available for this disease. Jakarta Province ranks 5th in the incidence of DHF. In...Background： DHF （dengue hemorrhagic fever） is an infectious disease that is caused by dengue virus. To date no specific medicine is available for this disease. Jakarta Province ranks 5th in the incidence of DHF. In 2014, the CI （cumulative incidence） of DHF was 48.7 cases/100,000. In Cipayung sub district （East Jakarta）, there were 136 new cases of DHF （CI = 52.1/100,000） in 2015. This study aimed to investigate the determinants of DHF outbreak in Cipayung, East Jakarta. Subjects and Method： This was a cross-sectional study, conducted in Cipayung, East Jakarta. A sample of 594 households were selected at random for this study. The dependent variable was DHF. The independent variables were dweller density, water container drainage, container supervision. The data were collected using questionnaire and observation. The data were analyzed by multiple logistic regression. Results： DHF incidence was affected by container supervision 〈 1 time per week （OR （Odd ratio） = 2.45; 95% CI = 1.57 to 3.84; p 〈 0.001）, container drainage 〈 4 times/month （OR = 1.82; 95% CI = 1.19 to 2.79; p = 0.006）, dweller density 〈 4 （OR = 0.61; 95% CI = 0.42 to 0.87; p = 0.007）. Conclusion： DHF incidence is affected by container supervision 〈 1 time per week, container drainage 〈 4 times/month, dweller density 〈 4.展开更多
Hypertension 10.5%, stroke 6.6%, asthma 5%, COPD 4%, diabetes mellitus 1.3%, cancer 1%, coronary heart disease 0.5%. In Cipunagara Health Center at 2016, the number of NCD (non-communicable disease) was 1,098 cases an...Hypertension 10.5%, stroke 6.6%, asthma 5%, COPD 4%, diabetes mellitus 1.3%, cancer 1%, coronary heart disease 0.5%. In Cipunagara Health Center at 2016, the number of NCD (non-communicable disease) was 1,098 cases and 53.6% cases were hypertension. Research purpose was to prove risk factor of hypertension in Cipunagara Health Center, Subang district at year 2017. Materials and methode: Research applied, crossectional, sample 61 respondents, incidental sampling, one day in Cipunagara and analyzed descriptive and analytic correlation. Results: 85.2% hypertension and complication, 14.8% diabetes mellitus, age ≥ 60 year 52.5%, women 73.8%, elementary level education 93.4%, housewife 54.1%, farmer 39.3%, genetic 75.4 %, smoking 23.0%, alcohol 24.6%, less activity 82%, less fruit and vegetables 80.3%, high salt consumption more than 1 tablespoon 68.9%, high caloric consumption 52.5%, good manage stress 73.8%, obesity 59%, abdominal sircumference normal 70.5%. Correlation results showed only salt consumption was significant and other variables included in model regression smoking, alcohol, stress, calory, activity. Final model of regression salt consumption p 0.019, OR 6.693, 95% CI.1.374-32.612, R216%;caloric consumption p 0.099, OR 0.229, 95% CI 0.040-1.322, R28%. Conclusions: non-communicable diseases risk factor was highest consumption salt and calory has contributed 24 %. Suggestions: reduced salt and calory consumption, salt engineering for reduce hypertension.展开更多
In this article,we obtain some weighted estimates for Marcinkiewicz integrals with non-smooth kernels on spaces of homogeneous type.The weightωconsidered here belongs to the Muckenhoupt’s class A_(∞).Moreover,weigh...In this article,we obtain some weighted estimates for Marcinkiewicz integrals with non-smooth kernels on spaces of homogeneous type.The weightωconsidered here belongs to the Muckenhoupt’s class A_(∞).Moreover,weighted estimates for commutators of BMO functions and Marcinkiewicz integrals are also given.展开更多
基金The APC of this article is covered by Research Grant YUTP 015LCO-526。
文摘This study aims to formulate a steady-state mathematical model for a three-dimensional permeable enclosure(cavity)to determine the oil extraction rate using three distinct nanoparticles,SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3),in unconventional oil reservoirs.The simulation is conducted for different parameters of volume fractions,porosities,and mass flow rates to determine the optimal oil recovery.The impact of nanoparticles on relative permeability(kr)and water is also investigated.The simulation process utilizes the finite volume ANSYS Fluent.The study results showed that when the mass flow rate at the inlet is low,oil recovery goes up.In addition,they indicated that silicon nanoparticles are better at getting oil out of the ground(i.e.,oil reservoir)than Al_(2)O_(3)and Fe_(2)O_(3).Most oil can be extracted from SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3)at a rate of 97.8%,96.5%,and 88%,respectively.
文摘APU(Auxiliary Power Unit)辅助动力装置作为民航飞机上不可缺少的系统之一,对飞机起着非常重要的作用。APU的失效、使用困难,将会给飞机的安全和使用带来严重的影响。特别是对那些航班的周转量比较高,或者地面保障设施资源比较紧张的机场,极有可能会直接造成航班的延误。本文针对APU常见故障类型及维护进行总结。
文摘In this article, we obtain the LP-boundedness of commutators of Lipschitz functions and singular integrals with non-smooth kernels on Euclidean spaces.
文摘Background： DHF （dengue hemorrhagic fever） is an infectious disease that is caused by dengue virus. To date no specific medicine is available for this disease. Jakarta Province ranks 5th in the incidence of DHF. In 2014, the CI （cumulative incidence） of DHF was 48.7 cases/100,000. In Cipayung sub district （East Jakarta）, there were 136 new cases of DHF （CI = 52.1/100,000） in 2015. This study aimed to investigate the determinants of DHF outbreak in Cipayung, East Jakarta. Subjects and Method： This was a cross-sectional study, conducted in Cipayung, East Jakarta. A sample of 594 households were selected at random for this study. The dependent variable was DHF. The independent variables were dweller density, water container drainage, container supervision. The data were collected using questionnaire and observation. The data were analyzed by multiple logistic regression. Results： DHF incidence was affected by container supervision 〈 1 time per week （OR （Odd ratio） = 2.45; 95% CI = 1.57 to 3.84; p 〈 0.001）, container drainage 〈 4 times/month （OR = 1.82; 95% CI = 1.19 to 2.79; p = 0.006）, dweller density 〈 4 （OR = 0.61; 95% CI = 0.42 to 0.87; p = 0.007）. Conclusion： DHF incidence is affected by container supervision 〈 1 time per week, container drainage 〈 4 times/month, dweller density 〈 4.
文摘Hypertension 10.5%, stroke 6.6%, asthma 5%, COPD 4%, diabetes mellitus 1.3%, cancer 1%, coronary heart disease 0.5%. In Cipunagara Health Center at 2016, the number of NCD (non-communicable disease) was 1,098 cases and 53.6% cases were hypertension. Research purpose was to prove risk factor of hypertension in Cipunagara Health Center, Subang district at year 2017. Materials and methode: Research applied, crossectional, sample 61 respondents, incidental sampling, one day in Cipunagara and analyzed descriptive and analytic correlation. Results: 85.2% hypertension and complication, 14.8% diabetes mellitus, age ≥ 60 year 52.5%, women 73.8%, elementary level education 93.4%, housewife 54.1%, farmer 39.3%, genetic 75.4 %, smoking 23.0%, alcohol 24.6%, less activity 82%, less fruit and vegetables 80.3%, high salt consumption more than 1 tablespoon 68.9%, high caloric consumption 52.5%, good manage stress 73.8%, obesity 59%, abdominal sircumference normal 70.5%. Correlation results showed only salt consumption was significant and other variables included in model regression smoking, alcohol, stress, calory, activity. Final model of regression salt consumption p 0.019, OR 6.693, 95% CI.1.374-32.612, R216%;caloric consumption p 0.099, OR 0.229, 95% CI 0.040-1.322, R28%. Conclusions: non-communicable diseases risk factor was highest consumption salt and calory has contributed 24 %. Suggestions: reduced salt and calory consumption, salt engineering for reduce hypertension.
文摘In this article,we obtain some weighted estimates for Marcinkiewicz integrals with non-smooth kernels on spaces of homogeneous type.The weightωconsidered here belongs to the Muckenhoupt’s class A_(∞).Moreover,weighted estimates for commutators of BMO functions and Marcinkiewicz integrals are also given.
