Theoretical incompleteness of the existing conservation laws of energy for polar continuum mechanics is further clarified. For completeness, the principles of total work and energy and of total work and energy of incr...Theoretical incompleteness of the existing conservation laws of energy for polar continuum mechanics is further clarified. For completeness, the principles of total work and energy and of total work and energy of incremental rate type are postulated. Via total variations of the former and the latter of them, the principles of virtual displacement and microrotation & stress and couple stress as well as virtual velocity and angular velocity & stress rate and couple stress rate are immediately obtained, respectively. From these principles all balance equations and boundary conditions for micropolar mechanics are naturally and simultaneously deduced. The essential differences between the nontraditional results obtained in this paper and the existing conservation laws of energy are expounded.展开更多
Penetrating wounds of the neck are often life-threatening. The victims are exposed to vascular and laryngotracheal lesions. The purpose of this work is to report the various aspects of the management of penetrating wo...Penetrating wounds of the neck are often life-threatening. The victims are exposed to vascular and laryngotracheal lesions. The purpose of this work is to report the various aspects of the management of penetrating wounds in our context and to make the medico-legal assessment of incapacity in the criminal sense or total incapacity for work. This is a retrospective study (2002-2014) on thirty-nine (39) cases of penetrating neck wounds, received at the ENT departments of the Aristide Le Dantec and Fann University Hospital Centers. Patients were predominantly male, representing 94% of cases with an average age of 27 years. Seventy (70%) of the accidents occurred in the region of Dakar. In 42% of cases, the circumstance of occurrence was a fight or an assault. The weapon used in most cases by the aggressor was a cutter or a knife. The average waiting time was 37 hours with extremes of 02 and 216 hours. Surgically, all patients had been examined under general anesthesia. In terms of lesions, 37 cases had profound cervical muscle injuries, i.e. 94%. There were 17 vascular lesions (43%). The medico-legal distribution of patients showed that among them, 10% had a total incapacity to work exceeding 21 days. The determination of total incapacity for work is an important medical procedure that requires capability and experience. The doctor must not fall into the trap of the confusion between the TIW on the criminal level and the TIW on the civil level. He must limit medically and should not make judgments.展开更多
These days, water and wastewater treatment are one of the most important issues regarding to the human health. Wastewaters are one of the most environmental pollutants and a wide range of adverse effects linked to the...These days, water and wastewater treatment are one of the most important issues regarding to the human health. Wastewaters are one of the most environmental pollutants and a wide range of adverse effects linked to the effect of untreated wastewaters or wastewaters that treat improperly. The aim of this present study was to evaluate performance of the wastewater treatment plant at Al-Diwaniyah City according to the national standards. Therefore, data of the most common parameters (PH, BOD<sub>5</sub>, COD, TSS, PO<sub>4</sub>, NO<sub>3</sub>, Cl, and Oil and Grease) were collected from the wastewater treatment plant. The study revealed that the wastewater treatment plant was receiving medium to strong influent with a BOD<sub>5</sub>/COD ratio of between (0.4 - 0.7). Regression analysis was achieved to approximate the influent of BOD<sub>5</sub> and TSS. While the effluent quality was exceeded the Iraq standards for disposing treated wastewater to the water bodies with a fluctuation in the ratio of BOD5to COD as a consequence of the operational problems. Therefore, these results would be of help to planners and policy makers in the City to combat such this problem and to take the necessary actions to reduce the impact of these pollutants.展开更多
1 INTRODUCTIONIt is known that a process system,typically a chemical process system,is composed of subsystemsof reaction,separation,heat recovery and utility with strong interactions among them.In thepast,in order to ...1 INTRODUCTIONIt is known that a process system,typically a chemical process system,is composed of subsystemsof reaction,separation,heat recovery and utility with strong interactions among them.In thepast,in order to reduce the complexity of the problem,the decomposition strategy was oftenused in process energy analysis and optimization design.According to the decomposition strategy,analysis and optimization of a system are performed heuristically in several steps which展开更多
This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagre...This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagreeable weights and due dates.And then,we extendedly study the two-agent Pareto-scheduling problem with jobs having a common due date to minimize each agent's total weighted late work,and give a polynomial-time algorithm that is based on the parameters analysis to generate the Pareto frontier.展开更多
文摘Theoretical incompleteness of the existing conservation laws of energy for polar continuum mechanics is further clarified. For completeness, the principles of total work and energy and of total work and energy of incremental rate type are postulated. Via total variations of the former and the latter of them, the principles of virtual displacement and microrotation & stress and couple stress as well as virtual velocity and angular velocity & stress rate and couple stress rate are immediately obtained, respectively. From these principles all balance equations and boundary conditions for micropolar mechanics are naturally and simultaneously deduced. The essential differences between the nontraditional results obtained in this paper and the existing conservation laws of energy are expounded.
文摘Penetrating wounds of the neck are often life-threatening. The victims are exposed to vascular and laryngotracheal lesions. The purpose of this work is to report the various aspects of the management of penetrating wounds in our context and to make the medico-legal assessment of incapacity in the criminal sense or total incapacity for work. This is a retrospective study (2002-2014) on thirty-nine (39) cases of penetrating neck wounds, received at the ENT departments of the Aristide Le Dantec and Fann University Hospital Centers. Patients were predominantly male, representing 94% of cases with an average age of 27 years. Seventy (70%) of the accidents occurred in the region of Dakar. In 42% of cases, the circumstance of occurrence was a fight or an assault. The weapon used in most cases by the aggressor was a cutter or a knife. The average waiting time was 37 hours with extremes of 02 and 216 hours. Surgically, all patients had been examined under general anesthesia. In terms of lesions, 37 cases had profound cervical muscle injuries, i.e. 94%. There were 17 vascular lesions (43%). The medico-legal distribution of patients showed that among them, 10% had a total incapacity to work exceeding 21 days. The determination of total incapacity for work is an important medical procedure that requires capability and experience. The doctor must not fall into the trap of the confusion between the TIW on the criminal level and the TIW on the civil level. He must limit medically and should not make judgments.
文摘These days, water and wastewater treatment are one of the most important issues regarding to the human health. Wastewaters are one of the most environmental pollutants and a wide range of adverse effects linked to the effect of untreated wastewaters or wastewaters that treat improperly. The aim of this present study was to evaluate performance of the wastewater treatment plant at Al-Diwaniyah City according to the national standards. Therefore, data of the most common parameters (PH, BOD<sub>5</sub>, COD, TSS, PO<sub>4</sub>, NO<sub>3</sub>, Cl, and Oil and Grease) were collected from the wastewater treatment plant. The study revealed that the wastewater treatment plant was receiving medium to strong influent with a BOD<sub>5</sub>/COD ratio of between (0.4 - 0.7). Regression analysis was achieved to approximate the influent of BOD<sub>5</sub> and TSS. While the effluent quality was exceeded the Iraq standards for disposing treated wastewater to the water bodies with a fluctuation in the ratio of BOD5to COD as a consequence of the operational problems. Therefore, these results would be of help to planners and policy makers in the City to combat such this problem and to take the necessary actions to reduce the impact of these pollutants.
文摘1 INTRODUCTIONIt is known that a process system,typically a chemical process system,is composed of subsystemsof reaction,separation,heat recovery and utility with strong interactions among them.In thepast,in order to reduce the complexity of the problem,the decomposition strategy was oftenused in process energy analysis and optimization design.According to the decomposition strategy,analysis and optimization of a system are performed heuristically in several steps which
基金the National Natural Science Foundation of China(Nos.12071442,11771406,and 11971443).
文摘This paper investigates the preemptive scheduling with release dates on a single machine to minimize the total weighted late work.We firstly present an O(nlogn)-time algorithm for the single-agent problem with disagreeable weights and due dates.And then,we extendedly study the two-agent Pareto-scheduling problem with jobs having a common due date to minimize each agent's total weighted late work,and give a polynomial-time algorithm that is based on the parameters analysis to generate the Pareto frontier.
